阅读说明：本技术 叉车电源装置、叉车充电装置和叉车充电系统 (Forklift power supply device, forklift charging device and forklift charging system ) 是由 夏先坤 王克田 于 2019-12-24 设计创作，主要内容包括：本发明涉及一种叉车车载电源装置、叉车充电装置和叉车充电系统。通过将充电连接器母头和公头上的连接检测端子设置为比充电端子短的端子,当充电连接器被误拔时,连接检测端子先于充电端子断开,使得叉车充电装置在充电端子还未断开时检测到连接检测端子的断开,及时切断充电电流,当充电端子断开时两侧充电端子上已经没有电流。可以达到防止在未人为切断充电电流的情况下,直接断开充电连接器的公头和母头,造成充电连接器发热、提前老化或损坏的风险。而且,也可以为工作人员人身安全提供更好的保障。(The invention relates to a forklift vehicle-mounted power supply device, a forklift charging device and a forklift charging system. By setting the connection detection terminals on the female head and the male head of the charging connector to be terminals shorter than the charging terminals, when the charging connector is pulled out by mistake, the connection detection terminals are disconnected before the charging terminals, so that the forklift charging device detects the disconnection of the connection detection terminals when the charging terminals are not disconnected, the charging current is cut off in time, and no current exists on the charging terminals on two sides when the charging terminals are disconnected. The charging connector can prevent the risk that the charging connector generates heat, ages in advance or is damaged due to the fact that the male head and the female head of the charging connector are directly disconnected under the condition that charging current is not artificially cut off. Moreover, better guarantee can be provided for the personal safety of workers.)

1. The utility model provides a fork truck vehicle mounted power supply device which characterized in that includes: the charging connector comprises a battery module, a battery management module and a charging connector female head;

the connection detection terminal of the female charging connector is connected with the connection detection end of the battery management module, the communication terminal of the female charging connector is connected with the communication end of the battery management module, and the charging terminal of the female charging connector is connected with the charging end of the battery module; the management control end of the battery management module is connected with the management controlled end of the battery module;

the charging connector female head is arranged corresponding to a charging connector male head on a forklift charging device, a connection detection terminal of the charging connector female head is used for being connected with a connection detection terminal of the charging connector male head, a communication terminal of the charging connector female head is used for being connected with a communication terminal of the charging connector male head, and a charging terminal of the charging connector female head is used for being connected with a charging terminal of the charging connector male head;

the length of the connection detection terminal of the charging connector female head is smaller than that of the charging terminal, and the length of the connection detection terminal of the charging connector male head is also smaller than that of the charging terminal;

when the charging connector female head is disconnected with the charging connector male head, the connection detection terminal in a connection state is disconnected before the charging terminal, so that the forklift charging device cuts off charging current before the charging terminal is disconnected.

2. The on-board power supply device for the forklift as recited in claim 1, further comprising a DC power supply module, an output terminal of the DC power supply module being connected to the connection detection terminal of the battery management module and the connection detection terminal of the female charging connector, respectively.

3. The forklift onboard power supply device according to claim 2, wherein the connection detection terminal of the charging connector female head includes a positive connection detection terminal and a negative connection detection terminal, the communication terminal includes a high communication terminal and a low communication terminal, and the charging terminal includes a positive charging terminal and a negative charging terminal; the connection detection end of the battery management module comprises a positive connection detection end and a negative connection detection end, and the communication end comprises a high communication end and a low communication end; the charging terminals of the battery module comprise a positive charging terminal and a negative charging terminal; the output end of the DC power supply module comprises a positive output end and a negative output end;

the positive connection detection terminal of the charging connector female head is respectively connected with a positive connection detection terminal of the battery management module and a positive output terminal of the DC power module, the negative connection detection terminal of the charging connector female head is respectively connected with a negative connection detection terminal of the battery management module and a negative output terminal of the DC power module, the high communication terminal of the charging connector female head is connected with a high communication terminal of the battery management module, the low communication terminal of the charging connector female head is connected with a low communication terminal of the battery management module, the positive charging terminal of the charging connector female head is connected with a positive charging terminal of the battery module, and the negative charging terminal of the charging connector female head is connected with a negative charging terminal of the battery module;

the positive connection detection terminal of the female charging connector is used for being connected with the positive connection detection terminal of the male charging connector, the negative connection detection terminal of the female charging connector is used for being connected with the negative connection detection terminal of the male charging connector, the high communication terminal of the female charging connector is used for being connected with the high communication terminal of the male charging connector, the low communication terminal of the female charging connector is used for being connected with the low communication terminal of the male charging connector, the positive charging terminal of the female charging connector is used for being connected with the positive charging terminal of the male charging connector, and the positive charging terminal of the female charging connector is used for being connected with the positive charging terminal of the male charging connector;

when the charging connector female head and the charging connector male head are in a connected state, the lengths of the positive connection detection terminal and the negative connection detection terminal are the same, the lengths of the high communication terminal and the low communication terminal are the same, and the lengths of the positive charging terminal and the negative charging terminal are the same; the positive connection detection terminal has a length less than a length of the positive charging terminal.

4. The on-board power supply device for the forklift as recited in claim 3, wherein the battery module includes a battery unit and a switch unit, a controlled terminal of the switch unit is connected to a management control terminal of the battery management module, an input terminal of the switch unit is connected to the positive charging terminal of the charging connector female terminal, and an output terminal of the switch unit is connected to a management controlled terminal of the battery unit.

5. The on-board power supply apparatus for a forklift truck according to claim 3 or 4, wherein the charging connector is a REMA320 connector.

6. A forklift charging device, comprising: the charging connector comprises a voltage transformation and current transformation module, a power supply module, a control module and a charging connector male head;

the input end of the variable voltage and variable current module is connected with the power module, the controlled end of the variable voltage and variable current module is connected with the control end of the control module, the output end of the variable voltage and variable current module is connected with the charging terminal of the male head of the charging connector, the connection detection terminal of the male head of the charging connector is connected with the connection detection end of the control module, and the communication terminal of the male head of the charging connector is connected with the communication end of the control module;

the charging connector male head is arranged corresponding to a charging connector female head on a forklift vehicle-mounted power supply device, a connection detection terminal of the charging connector male head is used for being connected with a connection detection terminal of the charging connector female head, a communication terminal of the charging connector male head is used for being connected with a communication terminal of the charging connector female head, and a charging terminal of the charging connector male head is used for being connected with a charging terminal of the charging connector female head;

the length of the connection detection terminal of the charging connector male head is smaller than that of the charging terminal, and the length of the connection detection terminal of the charging connector female head is also smaller than that of the charging terminal;

when the male head of the charging connector is disconnected with the female head of the charging connector, the control module detects that the connection detection terminal is disconnected while the connection detection terminal in a connection state is disconnected, and controls the voltage transformation and current transformation module not to output current any more, so that the charging current is cut off before the charging terminal is disconnected.

7. The forklift charging device according to claim 6, wherein the connection detection terminal of the charging connector male head includes a positive connection detection terminal and a negative connection detection terminal, the communication terminal includes a high communication terminal and a low communication terminal, and the charging terminal includes a positive charging terminal and a negative charging terminal; the output end of the voltage transformation and current transformation module comprises a positive output end and a negative output end, the communication end of the control module comprises a high communication end and a low communication end, and the connection detection end of the control module comprises a positive connection detection end and a negative connection detection end;

the positive connection detection terminal of the male head of the charging connector is connected with the positive connection detection end of the control module, the negative connection detection terminal of the male head of the charging connector is connected with the negative connection detection end of the control module, the high communication terminal of the male head of the charging connector is connected with the high communication end of the control module, the low communication terminal of the male head of the charging connector is connected with the low communication end of the control module, the positive charging terminal of the male head of the charging connector is connected with the positive output end of the variable voltage and variable current module, and the negative charging terminal of the male head of the charging connector is connected with the negative output end of the variable voltage and variable current module;

the positive connection detection terminal of the male head of the charging connector is used for being connected with the positive connection detection terminal of the female head of the charging connector, the negative connection detection terminal of the male head of the charging connector is used for being connected with the negative connection detection terminal of the female head of the charging connector, the high communication terminal of the male head of the charging connector is used for being connected with the high communication terminal of the female head of the charging connector, the low communication terminal of the male head of the charging connector is used for being connected with the low communication terminal of the female head of the charging connector, the positive charging terminal of the male head of the charging connector is used for being connected with the positive charging terminal of the female head of the charging connector, and the positive charging terminal of the male head of the charging connector is used for being connected with the positive charging terminal of the female head of the charging connector;

when the male head of the charging connector and the female head of the charging connector are in a connected state, the lengths of the positive connection detection terminal and the negative connection detection terminal are the same, the lengths of the high communication terminal and the low communication terminal are the same, and the contact lengths of the positive charging terminal and the negative charging terminal are the same; the positive connection detection terminal has a length less than a length of the positive charging terminal.

8. The forklift charging device of claim 7, wherein said charging connector is a REMA320 connector.

9. A forklift charging system, comprising: the forklift-mounted power supply device of any one of claims 1 to 5 and the forklift charging device of any one of claims 6 to 8.

Technical Field

The invention relates to the field of electric automobile charging, in particular to a forklift vehicle-mounted power supply device, a forklift charging device and a forklift charging system.

Background

With the increase of global warming and energy problems, automobile research and development manufacturers have developed pure electric vehicles in recent years. As a special vehicle device, a forklift also starts an electric driving process gradually due to its wide application scenario. In the conventional technology, for safety, electric forklifts are charged by using voltages far lower than that of private new energy vehicles, such as 24V, 48V and 80V. However, in order to ensure quick charging and operation continuity, a large charging current is required for charging, and the charging current of a general electric forklift is 200A or more.

In the process of charging the power supply device on the forklift truck, the inventor finds that at least the following problems exist in the conventional technology: the charging device of the forklift and the vehicle-mounted power supply device of the forklift are connected and charged through the charging connector, and a worker can directly disconnect the male head and the female head of the charging connector sometimes under the condition of forgetting to cut off the charging current of the charging device of the forklift, so that the charging connector generates heat, is aged or damaged in advance, and can also cause potential safety hazards endangering the personal safety of the worker.

Disclosure of Invention

Based on this, it is necessary to provide a fork truck vehicle mounted power supply device, fork truck charging device and fork truck charging system to plug loss and the potential safety hazard problem that the staff directly breaks off electric connector public head and female head and cause.

In order to achieve the above object, an embodiment of the present invention provides a power supply device mounted on a forklift truck, including: the charging connector comprises a battery module, a battery management module and a charging connector female head;

the connection detection terminal of the female head of the charging connector is connected with the connection detection end of the battery management module, the communication terminal of the female head of the charging connector is connected with the communication end of the battery management module, and the charging terminal of the female head of the charging connector is connected with the charging end of the battery module; the management control end of the battery management module is connected with the management controlled end of the battery module;

the charging connector female head is arranged corresponding to a charging connector male head on a forklift charging device, a connection detection terminal of the charging connector female head is used for being connected with a connection detection terminal of the charging connector male head, a communication terminal of the charging connector female head is used for being connected with a communication terminal of the charging connector male head, and a charging terminal of the charging connector female head is used for being connected with a charging terminal of the charging connector male head;

the length of the connection detection terminal of the female head of the charging connector is smaller than that of the charging terminal, and the length of the connection detection terminal of the male head of the charging connector is also smaller than that of the charging terminal;

when the female connector of the charging connector is disconnected with the male connector of the charging connector, the connection detection terminal in the connection state is disconnected before the charging terminal, so that the forklift charging device cuts off the charging current before the charging terminal is disconnected.

In one embodiment, the charging connector further comprises a DC power supply module, and the output end of the DC power supply module is respectively connected with the connection detection end of the battery management module and the connection detection terminal of the charging connector female head.

In one embodiment, the DC power module comprises a DC/DC transforming unit and a DC power source connected in series.

In one embodiment, the connection detection terminal of the female charging connector includes a positive connection detection terminal and a negative connection detection terminal, the communication terminal includes a high communication terminal and a low communication terminal, and the charging terminal includes a positive charging terminal and a negative charging terminal; the connection detection end of the battery management module comprises a positive connection detection end and a negative connection detection end, and the communication end comprises a high communication end and a low communication end; the charging terminals of the battery module comprise a positive charging terminal and a negative charging terminal; the output end of the DC power supply module comprises a positive output end and a negative output end;

the positive connection detection terminal of the female head of the charging connector is respectively connected with the positive connection detection end of the battery management module and the positive output end of the DC power module, the negative connection detection terminal of the female head of the charging connector is respectively connected with the negative connection detection end of the battery management module and the negative output end of the DC power module, the high communication terminal of the female head of the charging connector is connected with the high communication end of the battery management module, the low communication terminal of the female head of the charging connector is connected with the low communication end of the battery management module, the positive charging terminal of the female head of the charging connector is connected with the positive charging end of the battery module, and the negative charging terminal of the female head of the charging connector is connected with the negative charging end of the battery module;

the positive connection detection terminal of the female head of the charging connector is used for being connected with the positive connection detection terminal of the male head of the charging connector, the negative connection detection terminal of the female head of the charging connector is used for being connected with the negative connection detection terminal of the male head of the charging connector, the high communication terminal of the female head of the charging connector is used for being connected with the high communication terminal of the male head of the charging connector, the low communication terminal of the female head of the charging connector is used for being connected with the low communication terminal of the male head of the charging connector, the positive charging terminal of the female head of the charging connector is used for being connected with the positive charging terminal of the male head of the charging connector, and the positive charging terminal of the female head of the charging connector is used for being connected with the positive charging terminal of;

when the female head of the charging connector and the male head of the charging connector are in a connected state, the lengths of the positive connection detection terminal and the negative connection detection terminal are the same, the lengths of the high communication terminal and the low communication terminal are the same, and the lengths of the positive charging terminal and the negative charging terminal are the same; the length of the positive connection detection terminal is less than the length of the positive charging terminal.

In one embodiment, the battery module comprises a battery unit and a switch unit, wherein a controlled end of the switch unit is connected with a management control end of the battery management module, an input end of the switch unit is connected with a positive charging terminal of the female terminal of the charging connector, and an output end of the switch unit is connected with a management controlled end of the battery unit.

In one embodiment, the charging connector is a REMA320 connector.

On the other hand, the embodiment of the invention also provides a forklift charging device, which comprises: the charging connector comprises a voltage transformation and current transformation module, a power supply module, a control module and a charging connector male head;

the input end of the voltage transformation and current transformation module is connected with the power supply module, the controlled end of the voltage transformation and current transformation module is connected with the control end of the control module, the output end of the voltage transformation and current transformation module is connected with the charging terminal of the male head of the charging connector, the connection detection terminal of the male head of the charging connector is connected with the connection detection end of the control module, and the communication terminal of the male head of the charging connector is connected with the communication end of the control module;

the charging connector male head is arranged corresponding to a charging connector female head on a forklift vehicle-mounted power supply device, a connection detection terminal of the charging connector male head is used for being connected with a connection detection terminal of the charging connector female head, a communication terminal of the charging connector male head is used for being connected with a communication terminal of the charging connector female head, and a charging terminal of the charging connector male head is used for being connected with a charging terminal of the charging connector female head;

the length of the connection detection terminal of the male head of the charging connector is smaller than that of the charging terminal, and the length of the connection detection terminal of the female head of the charging connector is also smaller than that of the charging terminal;

when the male head of the charging connector is disconnected with the female head of the charging connector, the control module detects that the connection detection terminal is disconnected while the connection detection terminal in the connection state is disconnected, and controls the variable voltage and variable current module not to output current any more, so that the charging current is cut off before the charging terminal is disconnected.

In one embodiment, the connection detection terminal of the male connector of the charging connector includes a positive connection detection terminal and a negative connection detection terminal, the communication terminal includes a high communication terminal and a low communication terminal, and the charging terminal includes a positive charging terminal and a negative charging terminal; the output end of the voltage transformation and current transformation module comprises a positive output end and a negative output end, the communication end of the control module comprises a high communication end and a low communication end, and the connection detection end of the control module comprises a positive connection detection end and a negative connection detection end;

the positive connection detection terminal of the male head of the charging connector is connected with the positive connection detection end of the control module, the negative connection detection terminal of the male head of the charging connector is connected with the negative connection detection end of the control module, the high communication terminal of the male head of the charging connector is connected with the high communication end of the control module, the low communication terminal of the male head of the charging connector is connected with the low communication end of the control module, the positive charging terminal of the male head of the charging connector is connected with the positive output end of the voltage transformation and current transformation module, and the negative charging terminal of the male head of the charging connector is connected with the negative output end of the voltage transformation and current transformation module;

the positive connection detection terminal of the male head of the charging connector is used for being connected with the positive connection detection terminal of the female head of the charging connector, the negative connection detection terminal of the male head of the charging connector is used for being connected with the negative connection detection terminal of the female head of the charging connector, the high communication terminal of the male head of the charging connector is used for being connected with the high communication terminal of the female head of the charging connector, the low communication terminal of the male head of the charging connector is used for being connected with the low communication terminal of the female head of the charging connector, the positive charging terminal of the male head of the charging connector is used for being connected with the positive charging terminal of the female head of the charging connector, and the positive charging terminal of the male head of the charging connector is used for being connected with the positive charging terminal of;

when the male head of the charging connector and the female head of the charging connector are in a connected state, the lengths of the positive connection detection terminal and the negative connection detection terminal are the same, the lengths of the high communication terminal and the low communication terminal are the same, and the contact lengths of the positive charging terminal and the negative charging terminal are the same; the length of the positive connection detection terminal is less than the length of the positive charging terminal.

In one embodiment, the charging connector is a REMA320 connector.

In another aspect, an embodiment of the present invention further provides a forklift charging system, including: the forklift vehicle-mounted power supply device and the forklift charging device are disclosed.

One of the above technical solutions has the following advantages and beneficial effects:

by setting the connection detection terminals on the female head and the male head of the charging connector to be terminals shorter than the charging terminals, when the charging connector is pulled out by mistake, the connection detection terminals are disconnected before the charging terminals, so that the forklift charging device detects the disconnection of the connection detection terminals when the charging terminals are not disconnected, the charging current is cut off in time, and no current exists on the charging terminals on two sides when the charging terminals are disconnected. Based on the above embodiment, the risk that the charging connector generates heat, is aged in advance or is damaged due to the fact that the male head and the female head of the charging connector are directly disconnected under the condition that the charging current is not manually cut off can be prevented. Moreover, better guarantee can be provided for the personal safety of workers.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic diagram of a charging system for a forklift in one embodiment;

FIG. 2 is a schematic structural diagram of a forklift charging system in another embodiment;

FIG. 3 is a schematic structural diagram of a forklift charging system in another embodiment;

FIG. 4 is a schematic diagram of the structure of a REMA320 connector in one embodiment;

fig. 5 is a schematic diagram of the terminal arrangement of the REMA320 connector female/male in one embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An embodiment of the present invention provides a forklift-mounted power supply apparatus 100, as shown in fig. 1, including: battery module 110, battery management module 120, and charging connector female 130.

The connection detection terminal d of the female charging connector head 130 is connected to the connection detection terminal a of the battery management module 120, the communication terminal e of the female charging connector head 130 is connected to the communication terminal b of the battery management module 120, and the charging terminal f of the female charging connector head 130 is connected to the charging terminal c of the battery module 110; the management control terminal g of the battery management module 120 is connected to the management controlled terminal h of the battery module 110.

The charging connector female head 130 is arranged corresponding to the charging connector male head 240 on the forklift charging device 200, the connection detection terminal d of the charging connector female head 130 is used for connecting the connection detection terminal i of the charging connector male head 240, the communication terminal e of the charging connector female head 130 is used for connecting the communication terminal j of the charging connector male head 240, and the charging terminal f of the charging connector female head 130 is used for connecting the charging terminal k of the charging connector male head 240;

the length of the connection detection terminal d of the female charging connector 130 is smaller than that of the charging terminal f, and the length of the connection detection terminal i of the male charging connector 240 is also smaller than that of the charging terminal k; when the charging connector female head 130 is disconnected from the charging connector male head 240, the connection detection terminals (d and i) in the connected state are disconnected earlier than the charging terminals (f and k), so that the forklift charging device cuts off the charging current before the charging terminals (f and k) are disconnected.

Specifically, after the battery management module 120 is started, the connection detection voltage is continuously output at the connection detection terminal a. When the charging connector female head 130 and the male head 240 are connected, the forklift charging device 200 can detect that the forklift is connected, and then send the standard message protocol to the battery management module 120 through the communication terminal j of the charging connector female head 130. After the battery management module 120 analyzes and verifies the message correctly, the communication terminal e sends a voltage and current request charging message protocol to the forklift charging device 200, and after the forklift charging device 200 analyzes the message, the forklift charging device starts to charge the forklift power supply device through the charging terminal k according to the requested voltage and current.

Three kinds of terminals, namely, a charging terminal (f and k), a communication terminal (e and j) and a connection detection terminal (d and i), are arranged on the female head 130 and the male head 240 of the charging connector, and the terminals of the male head and the female head are correspondingly contacted and connected when the charging connector is connected. The female and male connection detection terminals (d and i) are shorter (f and k) than the charging terminals. When the connectors are connected, the contact length of the both-side connection detection terminals (d and i) is smaller than the contact length of the both-side charging terminals (f and k). The contact length of the terminal is the contact length of the terminal on two sides along the plugging direction of the female head and the male head. The female terminal and the male terminal may be a pin and a socket or a golden finger contact and a golden finger contact, which are not limited herein.

When the charging connector is suddenly disconnected, since the connection detection terminals (d and i) are shorter than the charging terminals (f and k), the connection detection terminals (d and i) are disconnected before the charging terminals (f and k), so that the connection detection voltage output by the battery management module 120 cannot reach the forklift charging device, and the forklift charging device 200 detects that the connection detection voltage is disconnected, the output of the charging current is cut off, and the charging current is guaranteed to be cut off before the charging terminals (f and k) on the two sides of the charging connector are disconnected.

The on-vehicle power supply unit of fork truck that this embodiment provided sets up the connection detection terminal on female head 130 of charging connector and the public head to the terminal that is shorter than the charging terminal, and when the charging connector was pulled out by mistake, the disconnection of connection detection terminal was earlier than the charging terminal for fork truck charging device detects the disconnection of connecting detection terminal when the charging terminal has not disconnected yet, in time cuts off the charging current, has not had the electric current on the charging terminal of both sides when the charging terminal disconnection. Based on the above embodiment, the risk that the charging connector generates heat, is aged in advance or is damaged due to the fact that the male head and the female head of the charging connector are directly disconnected under the condition that the charging current is not manually cut off can be prevented. Moreover, better guarantee can be provided for the personal safety of workers.

In one embodiment, since the capacity of the battery management module 120 to output voltage is limited, in order to achieve better connection detection effect, based on the above embodiment, as shown in fig. 2, the present embodiment further includes a DC power module 140 (i.e., a DC power module), and the output terminal of the DC power module 140 is connected to the connection detection terminal a of the battery management module 120 and the connection detection terminal d of the female charging connector 130, respectively. The DC power module 140 can continuously output a DC voltage, for example, a 12V DC voltage. In one embodiment, the DC power module 140 includes a DC/DC transformer unit and a DC power source in series. In another embodiment, the DC power module includes a DC/DC voltage/current transformation/transformation unit, an input end of the DC/DC voltage/current transformation/transformation unit is externally connected to the vehicle power supply, and an output end of the DC/DC voltage/current transformation/transformation unit is respectively connected to the connection detection end a of the battery management module 120 and the connection detection terminal d of the charging connector female head 130.

In one embodiment, as shown in fig. 3, the connection detection terminals of the female charging connector head 130 include a positive connection detection terminal and a negative connection detection terminal, the communication terminals include a high communication terminal and a low communication terminal, and the charging terminals include a positive charging terminal and a negative charging terminal. The connection detection end of the battery management module 120 includes a positive connection detection end (connection detection +) and a negative connection detection end (connection detection-), and the communication end includes a high communication end (communication-H) and a low communication end (communication-L); the charging terminals of the battery module 110 include a positive charging terminal (charge +) and a negative charging terminal (charge-). The output of the DC power module 140 includes a positive output and a negative output.

The positive connection detection terminal of the charging connector female head 130 is connected with the positive connection detection end of the battery management module 120 and the positive output end of the DC power module 140 respectively, the negative connection detection terminal of the charging connector female head 130 is connected with the negative connection detection end of the battery management module 120 and the negative output end of the DC power module 140 respectively, the high communication terminal of the charging connector female head 130 is connected with the high communication end of the battery management module 120, the low communication terminal of the charging connector female head 130 is connected with the low communication end of the battery management module 120, the positive charging terminal of the charging connector female head 130 is connected with the positive charging end of the battery module 110, and the negative charging terminal of the charging connector female head 130 is connected with the negative charging end of the battery module 110.

The positive connection detection terminal of the female charging connector head 130 is used for connecting the positive connection detection terminal of the male charging connector head 240, the negative connection detection terminal of the female charging connector head 130 is used for connecting the negative connection detection terminal of the male charging connector head 240, the high-communication terminal of the female charging connector head 130 is used for connecting the high-communication terminal of the male charging connector head 240, the low-communication terminal of the female charging connector head 130 is used for connecting the low-communication terminal of the male charging connector head 240, the positive charging terminal of the female charging connector head 130 is used for connecting the positive charging terminal of the male charging connector head 240, and the positive charging terminal of the female charging connector head 130 is used for connecting the positive charging terminal of the male charging connector head 240.

When the charging connector female head 130 and the charging connector male head 240 are in a connected state, the lengths of the positive connection detection terminal and the negative connection detection terminal are the same, the lengths of the high communication terminal and the low communication terminal are the same, and the lengths of the positive charging terminal and the negative charging terminal are the same; the length of the positive connection detection terminal is less than the length of the positive charging terminal.

Specifically, a positive connection terminal and a positive charging terminal of the charging connector female head 130 are used for passing through a positive electrical signal, a negative connection terminal and a negative charging terminal of the charging connector female head 130 are used for passing through a negative electrical signal, and a high communication terminal and a low communication terminal of the charging connector female head 130 are matched with each other to pass through an interactive message protocol electrical signal between the forklift truck-mounted power supply device and the forklift truck charging device.

In one embodiment, the battery module 110 includes a battery unit 112 and a switch unit 111, wherein a controlled terminal of the switch unit 111 is connected to a management control terminal of the battery management module 120, an input terminal of the switch unit 111 is connected to a positive charging terminal of the charging connector female terminal, and an output terminal of the switch unit 111 is connected to a management controlled terminal of the battery unit 112.

After sending the voltage and current request charging message protocol to the forklift truck charging device 200, the battery management module 120 sends a control signal to connect the input and output terminals of the switch unit 111, so that the battery unit 112 can receive the charging current from the forklift truck charging device 200. Since the last charging voltage and current of the forklift charging device 200 may be larger than the voltage and current requested by the battery management module 120, it is possible to prevent damage to the battery unit 112 when the forklift charging device 200 is turned on by mistake.

In one embodiment, as shown in fig. 4 and 5, the charging connector is a REMA320 connector.

Specifically, the longest terminals on both sides of the REMA320 connector female/male may be used as the positive charging terminal and the negative charging terminal, the second longest terminals of the REMA320 connector female/male may be used as the positive connection detection terminal and the negative connection detection terminal, and the shortest terminals of the REMA320 connector female/male may be used as the high communication terminal and the low communication terminal.

In one embodiment, the battery management module 120 is a BMS management module.

On the other hand, an embodiment of the present invention further provides a forklift charging device 200, as shown in fig. 1, including: a transformer module 210, a power module 220, a control module 230, and a charging connector male 240.

An input end q of the transforming and converting module 210 is connected with an output end r of the power module 220, a controlled end p of the transforming and converting module 210 is connected with a control end o of the control module 230, an output end n of the transforming and converting module 210 is connected with a charging terminal k of the charging connector male connector 240, a connection detection terminal i of the charging connector male connector 240 is connected with a connection detection end l of the control module 230, and a communication terminal j of the charging connector male connector 240 is connected with a communication end m of the control module 230.

The charging connector male connector 240 is arranged corresponding to the charging connector female connector 130 on the forklift truck-mounted power supply device 100, the connection detection terminal i of the charging connector male connector 240 is used for connecting the connection detection terminal d of the charging connector female connector 130, the communication terminal j of the charging connector male connector 240 is used for connecting the communication terminal e of the charging connector female connector 130, and the charging terminal k of the charging connector male connector 240 is used for connecting the charging terminal f of the charging connector female connector 130.

The length of the connection detection terminal i of the charging connector male head 240 is smaller than the length of the charging terminal k, and the length of the connection detection terminal d of the charging connector female head 130 is also smaller than the length of the charging terminal f.

When the male charging connector 240 is disconnected from the female charging connector 130, the control module 230 detects that the connection detection terminals (i and d) are disconnected while the connection detection terminals (i and d) in the connected state are disconnected, and controls the transformer module 210 to stop outputting current, so as to cut off the charging current before the charging terminals (k and f) are disconnected.

Specifically, the principle is the same as that of the forklift vehicle-mounted power supply device. When the charging connector is connected, the corresponding terminals on the female head and the male head of the charging connector are in contact connection. The battery management module 120 of the on-board power supply device for a forklift truck outputs a connection detection voltage to the control module 230 of the charging device 200 for a forklift truck. After detecting the connection detection voltage, the control module 230 sends standard message protocol information to the communication terminal b of the battery management module 120 of the on-board power supply device of the forklift through the communication terminals (j and e) of the male and female charging connectors. After receiving the standard message protocol information, the battery management module 120 performs parsing and verification, and if the verification is correct, sends a voltage and current request charging message protocol to the communication terminal of the control module 230 of the forklift charging device through the communication terminal b via the communication terminals (j and e) of the male and female connectors of the charging connector. After the control module 230 analyzes the voltage and current request charging message protocol, the voltage and current transformation and transformation module 210 is controlled to output an electrical signal according to the analyzed current and voltage, and the electrical signal is charged to the battery module 110 of the forklift vehicle-mounted power supply device through the charging terminals (k and f) of the male terminal and the female terminal of the charging connector. The power module 220 may be a circuit module for externally connecting to a commercial power supply. The power module 220 may also be a circuit module that includes an energy storage battery and may be externally connected to a mains power supply.

When the operator forgets to turn off the charging current and directly pulls out the charging connector, due to the special design of the length of the terminal of the charging connector, the connection detection terminal is disconnected first, and when the control module 230 of the forklift charging device detects that the voltage of the connection detection terminal disappears, the voltage-variable current-variable module 210 is immediately controlled to stop outputting the charging current. The control may be implemented by a three terminal switch. Therefore, before the charging terminal of the long and connection detection terminal is disconnected, the charging terminals of the male head and the female head do not have electric signals to pass through, and the risk that the charging connector generates heat, ages in advance or is damaged due to the fact that the male head and the female head of the charging connector are directly disconnected under the condition that the charging current is not artificially cut off in advance is effectively prevented. Moreover, better guarantee can be provided for the personal safety of workers.

In one embodiment, as shown in fig. 3, the connection detection terminal of the male charging connector 240 includes a positive connection detection terminal and a negative connection detection terminal, the communication terminal includes a high communication terminal and a low communication terminal, and the charging terminal includes a positive charging terminal and a negative charging terminal; the output end of the voltage transformation and current transformation module 210 comprises a positive output end (charging +) and a negative output end (charging-), the communication end of the control module 230 comprises a high communication end (communication-H) and a low communication end (communication-L), and the connection detection end of the control module 230 comprises a positive connection detection end (connection detection +) and a negative connection detection end (connection detection-);

the positive connection detection terminal of the male head 240 of the charging connector is connected with the positive connection detection end of the control module 230, the negative connection detection terminal of the male head 240 of the charging connector is connected with the negative connection detection end of the control module 230, the high communication terminal of the male head 240 of the charging connector is connected with the high communication end of the control module 230, the low communication terminal of the male head 240 of the charging connector is connected with the low communication end of the control module 230, the positive charging terminal of the male head 240 of the charging connector is connected with the positive output end of the variable voltage and current module 210, and the negative charging terminal of the male head 240 of the charging connector is connected with the negative output end of the variable voltage and current module 210;

the positive connection detection terminal of the male charging connector 240 is used for connecting the positive connection detection terminal of the female charging connector 130, the negative connection detection terminal of the male charging connector 240 is used for connecting the negative connection detection terminal of the female charging connector 130, the high communication terminal of the male charging connector 240 is used for connecting the high communication terminal of the female charging connector 130, the low communication terminal of the male charging connector 240 is used for connecting the low communication terminal of the female charging connector 130, the positive charging terminal of the male charging connector 240 is used for connecting the positive charging terminal of the female charging connector 130, and the positive charging terminal of the male charging connector 240 is used for connecting the positive charging terminal of the female charging connector 130;

when the male charging connector head 240 and the female charging connector head 130 are in a connected state, the lengths of the positive connection detection terminal and the negative connection detection terminal are the same, the lengths of the high communication terminal and the low communication terminal are the same, and the contact lengths of the positive charging terminal and the negative charging terminal are the same; the length of the positive connection detection terminal is less than the length of the positive charging terminal.

In one embodiment, as shown in fig. 4 and 5, the charging connector is a REMA320 connector.

Specifically, the longest terminals on both sides of the REMA320 connector female/male may be used as the positive charging terminal and the negative charging terminal, the second longest terminals of the REMA320 connector female/male may be used as the positive connection detection terminal and the negative connection detection terminal, and the shortest terminals of the REMA320 connector female/male may be used as the high communication terminal and the low communication terminal.

In one embodiment, when the control module 230 does not detect the connection detection voltage for 10 minutes, it enters the sleep mode, which reduces the energy consumption cost of the forklift charging device.

In one embodiment, the transformer module 210 is a DC/DC module.

In one embodiment, the control module 230 includes a chip capable of performing data processing or a chip system capable of performing data processing, such as a single chip, an ARM processor, a DSP processor, and the like.

On the other hand, an embodiment of the present invention further provides a forklift charging system, as shown in fig. 1 to 3, including: the forklift vehicle-mounted power supply device and the forklift charging device are disclosed.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.