阅读说明：本技术 智能电动车 (Intelligent electric vehicle ) 是由 彭杰 王淳 于 2018-09-11 设计创作，主要内容包括：本发明公开了一种智能电动车,包括可拆卸地连接到智能电动车的电池集成件和充电设备,所述电池集成件包括：由多个电池电连接组成电池单元、主监测电路、副监测电路和保护器,并在副监测电路检测到任意一个电池达到过电压的条件时,保护器中断电池单元流向电源模块的电流,产生充电禁止信号,充电设备接收所述禁止充电信号,中断流向电池集成件的充电电流,停止充电,如此可以提高充电的安全性。(The invention discloses an intelligent electric vehicle, which comprises a battery integration piece and a charging device, wherein the battery integration piece is detachably connected to the intelligent electric vehicle, and the battery integration piece comprises: the charging device comprises a battery unit, a main monitoring circuit, an auxiliary monitoring circuit and a protector, wherein the battery unit, the main monitoring circuit, the auxiliary monitoring circuit and the protector are electrically connected, when the auxiliary monitoring circuit detects that any battery reaches an overvoltage condition, the protector interrupts the current flowing to a power supply module from the battery unit to generate a charging prohibition signal, the charging device receives the charging prohibition signal, interrupts the charging current flowing to a battery integrated part, and stops charging, so that the charging safety can be improved.)

1. An intelligent electric vehicle including a battery pack detachably connected to the intelligent electric vehicle and a charging device, the battery pack comprising:

a battery unit composed of a plurality of batteries electrically connected;

a main monitoring circuit that monitors the voltage of each battery and/or the total voltage of the battery cells during the charging and discharging of the battery integrated parts;

the main control unit is used for controlling the charging process of the battery unit during the charging of the battery integration piece and controlling the current flowing to the intelligent electric vehicle during the discharging of the battery integration piece;

the power supply module is electrically connected to the battery unit and is used for converting the electric energy of the battery unit into the electric energy used by the main control unit;

an interaction module electrically connected to the main control unit for communicating with the intelligent electric vehicle and the charging device during the charging and discharging of the battery integration;

characterized in that, the battery integrated piece still includes:

a sub-monitoring circuit that monitors the voltage of each battery during charging of the battery integrated part to detect whether any battery reaches an overvoltage condition; and

and the protector is electrically connected between the battery unit and the power supply module, and when the auxiliary monitoring circuit detects that any battery reaches an overvoltage condition, the protector interrupts the current flowing to the power supply module from the battery unit so as to enable the interaction module to generate a charging prohibition signal, and the charging equipment receives the charging prohibition signal so as to interrupt the charging current flowing to the battery integration piece.

2. The intelligent electric vehicle according to claim 1, wherein: the protector includes:

the photoelectric coupler is electrically connected with the auxiliary monitoring circuit;

a fuse electrically connected between the battery cell and the power module; and

and a field effect transistor electrically connected to the battery unit and the fuse, and receiving a signal of the photoelectric coupler to short-circuit the fuse with the battery unit when the sub monitoring circuit detects that any one of the batteries reaches an overvoltage condition, thereby interrupting a current flowing from the battery unit to the power module.

3. The intelligent electric vehicle according to claim 1, wherein: and under the condition that the main monitoring circuit cannot work normally, the auxiliary monitoring circuit provides backup protection.

4. The intelligent electric vehicle according to claim 1, wherein: the main monitoring circuit is electrically connected to the main control unit, and the main control unit receives information of the main monitoring circuit indicating a voltage of each battery and/or a total voltage of the battery cells and outputs a control signal to control a charging process of the battery pack during charging of the battery pack and to control a current flowing to the smart electric vehicle during discharging of the battery pack.

5. An intelligent electric vehicle including a battery pack detachably connected to the intelligent electric vehicle and a charging device, the battery pack comprising:

a battery unit composed of a plurality of batteries electrically connected;

a main monitoring circuit that monitors the voltage of each battery and/or the total voltage of the battery integrated piece during the charging and discharging of the battery integrated piece;

the main control unit is used for controlling the charging process of the battery integration piece during the charging of the battery integration piece and controlling the current flowing to the intelligent electric vehicle during the discharging of the battery integration piece;

the power supply module is electrically connected to the battery unit and is used for converting the electric energy of the battery unit into the electric energy used by the main control unit;

an interaction module electrically connected to the main control unit for communicating with the intelligent electric vehicle and the charging device during the charging and discharging of the battery integration;

characterized in that, the battery integrated piece still includes:

the auxiliary monitoring circuit monitors the voltage of each battery during the charging of the battery integrated part so as to detect whether the battery reaches an overvoltage state; and

and the protector is electrically connected to the auxiliary monitoring circuit and used for controlling the current flowing to the power module from the battery unit according to the detection signal of the auxiliary monitoring circuit.

6. The intelligent electric vehicle of claim 5, wherein: the protector includes:

the photoelectric coupler is electrically connected with the auxiliary monitoring circuit;

a fuse electrically connected between the battery cell and the power module; and

and a field effect transistor electrically connected to the battery unit and the fuse, and receiving a signal of the photoelectric coupler to short-circuit the fuse with the battery unit when the sub monitoring circuit detects that any one of the batteries reaches an overvoltage condition, thereby interrupting a current flowing from the battery unit to the power module.

7. The intelligent electric vehicle of claim 5, wherein: and under the condition that the main monitoring circuit cannot work normally, the auxiliary monitoring circuit provides backup protection.

8. The intelligent electric vehicle of claim 5, wherein: the main monitoring circuit is electrically connected to the main control unit, and the main control unit receives information of the main monitoring circuit indicating a voltage of each battery and/or a total voltage of the battery cells and outputs a control signal to control a charging process of the battery pack during charging of the battery pack and to control a current flowing to the smart electric vehicle during discharging of the battery pack.

9. An intelligent electric vehicle including a battery pack detachably connected to the intelligent electric vehicle and a charging device, the battery pack comprising:

the battery unit is formed by electrically connecting a plurality of battery cores;

a main monitoring circuit that monitors the voltage of each battery and/or the total voltage of the battery integrated piece during the charging and discharging of the battery integrated piece;

the main control unit is used for controlling the charging process of the battery integration piece during the charging of the battery integration piece and controlling the current flowing to the intelligent electric vehicle during the discharging of the battery integration piece;

characterized in that, the battery integrated piece still includes:

the auxiliary monitoring circuit monitors the voltage of each battery during the charging of the battery integrated part so as to detect whether the battery reaches an overvoltage state; and

and the protector is electrically connected to the auxiliary monitoring circuit and used for controlling the charging current flowing to the power module from the charging equipment according to the detection signal of the auxiliary monitoring circuit.

10. The intelligent electric vehicle of claim 9, wherein: the protector includes:

the photoelectric coupler is electrically connected with the auxiliary monitoring circuit;

a fuse electrically connected between the battery cell and the power module; and

and a field effect transistor electrically connected to the battery unit and the fuse, and receiving a signal of the photoelectric coupler to short-circuit the fuse with the battery unit when the sub monitoring circuit detects that any one of the batteries reaches an overvoltage condition, thereby interrupting a current flowing from the battery unit to the power module.

Technical Field

The invention relates to an intelligent electric vehicle, in particular to an intelligent electric vehicle with a battery integration piece.

Background

The power demand of the intelligent electric vehicle is getting bigger and bigger, the battery integration piece is used as the energy source of the intelligent electric vehicle, and the demand of the output voltage is also getting higher and higher.

However, a higher output voltage also means that the possibility of failure of the battery in the battery pack is also higher and higher. Therefore, it is necessary to take additional protective measures to solve possible malfunctions of the battery pack, such as overcharge, overdischarge, overcurrent, overheat, battery unbalance, etc., and prevent damage to internal or external components of the battery pack.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide an intelligent electric vehicle capable of improving charging/discharging safety.

In order to achieve the above object, the present invention adopts the following technical solutions:

an intelligent electric vehicle comprises a battery integration piece and a charging device, wherein the battery integration piece is detachably connected to the intelligent electric vehicle, comprises a battery unit and is formed by electrically connecting a plurality of batteries; a main monitoring circuit that monitors the voltage of each battery and/or the total voltage of the battery cells during the charging and discharging of the battery integrated parts; the main control unit is used for controlling the charging process of the battery unit during the charging of the battery integration piece and controlling the current flowing to the intelligent electric vehicle during the discharging of the battery integration piece; the power supply module is electrically connected to the battery unit and is used for converting the electric energy of the battery unit into the electric energy used by the main control unit; an interaction module electrically connected to the main control unit for communicating with the intelligent electric vehicle and the charging device during the charging and discharging of the battery integration; the battery integrated part also comprises a secondary monitoring circuit, wherein the secondary monitoring circuit monitors the voltage of each battery during the charging period of the battery integrated part so as to detect whether the battery reaches an overvoltage condition; and the protector is electrically connected between the battery unit and the power supply module, when the auxiliary monitoring circuit detects that any battery reaches an overvoltage condition, the protector interrupts the current flowing to the power supply module from the battery unit so as to enable the interaction module to generate a charging prohibition signal, and the charging equipment receives the charging prohibition signal so as to interrupt the charging current flowing to the battery integration piece.

Further, the protector comprises a photoelectric coupler electrically connected with the secondary monitoring circuit; a fuse electrically connected between the battery cell and the power module; and a field effect transistor electrically connected to the battery unit and the fuse, and receiving a signal of the photocoupler to short-circuit the fuse with the battery unit when the sub monitoring circuit detects that any one of the batteries reaches an overvoltage condition, thereby interrupting a current flowing from the battery unit to the power module.

Further, under the condition that the main monitoring circuit can not work normally, the auxiliary monitoring circuit provides backup protection.

Further, the main monitoring circuit is electrically connected to the main control unit, and the main control unit receives information of the main monitoring circuit indicating a voltage of each battery and/or a total voltage of the battery cells and outputs a control signal to control a charging process of the battery pack during the charging of the battery pack and control a current flowing to the smart electric vehicle during the discharging of the battery pack.

The battery integration piece comprises a battery unit consisting of a plurality of batteries which are electrically connected; a main monitoring circuit that monitors the voltage of each battery and/or the total voltage of the battery integrated piece during the charging and discharging of the battery integrated piece; the main control unit is used for controlling the charging process of the battery integration piece during the charging of the battery integration piece and controlling the current flowing to the intelligent electric vehicle during the discharging of the battery integration piece; the power supply module is electrically connected to the battery unit and is used for converting the electric energy of the battery unit into the electric energy used by the main control unit; an interaction module electrically connected to the main control unit for communicating with the intelligent electric vehicle and the charging device during the charging and discharging of the battery integration; the battery integrated part also comprises a secondary monitoring circuit, wherein the secondary monitoring circuit monitors the voltage of each battery during the charging period of the battery integrated part so as to detect whether the battery reaches an overvoltage state; and the protector is electrically connected to the auxiliary monitoring circuit and used for controlling the current flowing to the power module from the battery unit according to the detection signal of the auxiliary monitoring circuit.

Further, the protector comprises a photoelectric coupler electrically connected with the secondary monitoring circuit; a fuse electrically connected between the battery cell and the power module; and a field effect transistor electrically connected to the battery unit and the fuse, and receiving a signal of the photocoupler to short-circuit the fuse with the battery unit when the sub monitoring circuit detects that any one of the batteries reaches an overvoltage condition, thereby interrupting a current flowing from the battery unit to the power module.

Further, under the condition that the main monitoring circuit can not work normally, the auxiliary monitoring circuit provides backup protection.

Further, the main monitoring circuit is electrically connected to the main control unit, and the main control unit receives information of the main monitoring circuit indicating a voltage of each battery and/or a total voltage of the battery cells and outputs a control signal to control a charging process of the battery pack during the charging of the battery pack and control a current flowing to the smart electric vehicle during the discharging of the battery pack.

The battery integration piece comprises a battery unit consisting of a plurality of battery cores which are electrically connected; a main monitoring circuit that monitors the voltage of each battery and/or the total voltage of the battery integrated piece during the charging and discharging of the battery integrated piece; the main control unit is used for controlling the charging process of the battery integration piece during the charging of the battery integration piece and controlling the current flowing to the intelligent electric vehicle during the discharging of the battery integration piece; the battery integrated part also comprises a secondary monitoring circuit, wherein the secondary monitoring circuit monitors the voltage of each battery during the charging period of the battery integrated part so as to detect whether the battery reaches an overvoltage state; and the protector is electrically connected to the auxiliary monitoring circuit and used for controlling the charging current flowing to the power supply module by the charging equipment according to the detection signal of the auxiliary monitoring circuit.

Further, the protector comprises a photoelectric coupler electrically connected with the secondary monitoring circuit; a fuse electrically connected between the battery cell and the power module; and a field effect transistor electrically connected to the battery unit and the fuse, and receiving a signal of the photocoupler to short-circuit the fuse with the battery unit when the sub monitoring circuit detects that any one of the batteries reaches an overvoltage condition, thereby interrupting a current flowing from the battery unit to the power module.

The invention has the advantages of providing double protection and improving the charging and/or discharging safety of the battery integration piece.

Drawings

FIG. 1 is a schematic view of one embodiment of an intelligent electric vehicle;

fig. 2 is a schematic diagram of an internal circuit of the battery pack and the charging apparatus of the first embodiment;

fig. 3 is a schematic diagram of an internal circuit of the battery pack and the charging apparatus according to the second embodiment.

Detailed Description

The invention is described in detail below with reference to the figures and the embodiments.

Referring to fig. 1, the battery integrated unit 10 is detachably mounted to the intelligent electric vehicle 20 and can supply power to the intelligent electric vehicle 20. Referring to fig. 2, the battery cartridge 10 is detachably mounted to a charging device 30 that can supply a charging current to the battery cartridge 10.

The battery integrated part 10 includes a housing 101, a plurality of batteries 102 are disposed in the housing, and the plurality of batteries 102 are electrically connected in series and/or in parallel to form a battery unit 103.

Referring to fig. 3, the charging apparatus 30 includes a positive power supply terminal P +, a negative power supply terminal P-, a power conversion module 304, a main control unit 302, and a charging switch 303. The positive power supply terminal P + and the negative power supply terminal P-of the charging device 30 are electrically connected to the power conversion module 304, and the power conversion module 304 is configured to convert the electric energy of the external power supply 40 into the electric energy that can be obtained by the battery pack 10. The charge switch 303 is electrically connected between the positive power supply terminal P + or the negative power supply terminal P-and the power conversion module 304, and is used for allowing or prohibiting the current from the power conversion module 304 and the external power supply 40 according to a signal of the main control unit. The main control unit 302 is used to output a control signal to the charging switch 303 to allow or prohibit the current from the power conversion module 304 and the external power source 40.

The battery pack 10 has a positive power terminal B + electrically connected to the positive electrode of the battery cell 103 and a negative power terminal B-electrically connected to the negative electrode of the battery cell 103. When the battery pack 10 is connected to the charging device 30, the positive power terminal B + of the battery pack 10 is electrically connected to the positive power terminal P + of the charging device 30, and the negative power terminal B + of the battery pack 10 is electrically connected to the negative power terminal P-of the charging device 30. In this way, the external power supply 40, the charging device 30, and the battery integrated unit 10 constitute a charging circuit by electrically connecting the power terminal of the battery integrated unit 10 and the power terminal of the charging device 30.

In some embodiments, the battery pack 10 further includes an interaction module 108, and the charging device 30 has an interaction module 301 corresponding thereto. The battery integrated communication module 108 is electrically connected with the communication module 301 of the charging device 30 in a limited manner or in a wireless manner. In some specific embodiments, the interaction module 108 of the battery integrated part is electrically connected with the interaction module 301 of the charging device 30 by a wired manner. For example, the interaction module 108 of the battery integrated package 10 has the communication terminal D1, the interaction module 301 of the charging device 30 has the communication terminal D2, and when the battery integrated package 10 is connected to the charging device 30, the communication terminal D1 of the battery integrated package 10 and the communication terminal D2 of the charging device 30 are electrically connected. In some embodiments, the interaction module 108 of the battery pack 10 includes only the communication terminal D1, and the interaction module 301 of the charging device 30 includes only the communication terminal D2. That is, the battery pack 10 includes only the communication terminal D1, the charging device 30 includes only the communication terminal D2, and the battery pack 10 and the charging device 30 directly perform signal transmission through the connection of the communication terminal D1 and the communication terminal D2.

Referring to fig. 2, a battery integrated unit 10 according to an embodiment includes: a main monitoring circuit 104 that monitors the voltage of each battery 10 and/or the total voltage of the battery integration during the charge and discharge of the battery integration 10; a sub-monitoring circuit 105 that monitors the voltage of each battery 102 during charging of the battery integrated unit 10 to detect whether any of the batteries 102 reaches an overvoltage condition; a main control unit 106 for controlling a charging process of the battery integrated unit 10 during charging of the battery integrated unit 10 and controlling a current flowing to the smart electric vehicle 20 during discharging of the battery integrated unit 10; a power module 107 electrically connected to the battery unit 103 for converting the electric energy of the battery unit 103 into electric energy for the main control unit 106 to use; and an interaction module 108 electrically connected to the main control unit 106 for information transfer with the interaction modules of the intelligent electric vehicle 20 and the charging device 30 during the charging and discharging of the battery integrated part 100.

The overvoltage condition is that the voltage of each battery is greater than or equal to a first voltage threshold, and/or the total voltage of the battery cells or the battery integration is greater than or equal to a second voltage threshold. The first voltage threshold is, for example, 4.0V, and the threshold of the second voltage threshold may be set according to the total number of the batteries 102 in the battery integrated unit 10 and the first voltage threshold of each battery.

The battery pack 10 further includes a protector electrically connected between the battery cells 103 and the power module 107, and when the secondary monitoring circuit 105 detects that any one of the batteries 102 has reached an overvoltage condition, the protector interrupts the current flowing from the battery cell 103 to the power module 107 to cause the interaction module 108 to generate a charge prohibition signal, which is received by the charging device 30 to interrupt the charging current flowing to the battery cells 103 in the battery pack 10.

In some specific embodiments, the main monitoring circuit 104 is electrically connected to the main control unit 106, and the main control unit 106 receives the information of the main monitoring circuit 104 indicating the voltage of each battery and/or the total voltage of the battery cells and outputs a control signal to control the charging process of the battery pack 10 during the charging of the battery pack 10, for example, when the battery pack 10 has a condition such as overcharge, over-temperature, unbalance of the battery, etc., the main control unit 106 controls the electronic switch 107 to be turned off to interrupt the current from the charging device; and controlling the current flowing to the smart electric vehicle 20 during the discharge of the battery pack, for example, when the battery pack 10 has a condition such as over-discharge, over-current, over-temperature, etc., the main control unit 106 controls the electronic switch 107 to be turned off to interrupt the current flowing to the battery cell.

The secondary monitoring circuit 105 is different from the primary monitoring circuit 104 in that it is independent of each other, so that the secondary monitoring circuit 105 can provide backup protection to avoid internal or external damage to the battery pack 10 when the primary monitoring circuit 104 fails to operate normally, for example, when the battery equalization protection function of the primary monitoring circuit 104 fails during charging. In such a way, two voltage monitoring circuits which are independent of each other are used, and after any one voltage monitoring circuit is abnormal, the other voltage monitoring circuit can be used, so that the charging and/or discharging safety is improved.

The sub-monitoring circuit 105 is not electrically connected to the main control unit 106, i.e. the sub-monitoring circuit 105 does not communicate with the main control unit. The monitoring signal of the sub-monitoring circuit 105 is directly sent to the protector. When the secondary monitoring circuit 105 detects that any one of the batteries 102 has reached an overvoltage condition, the protector interrupts the current flowing from the battery cell 103 to the power module 107, so that the interaction module 108 generates a charge inhibit signal, which is received or recognized by the charging device 30 to interrupt the charging current flowing to the battery pack 10.

In some specific embodiments, the protector comprises: a photocoupler 110 having an input end electrically connected to the sub monitoring circuit 105; a fuse 111 electrically connected between the battery cell 103 and the power supply module 107; and an electronic switch 112 electrically connected to the battery cells 103 and the fuse 111, wherein when the sub-monitoring circuit 105 monitors that any one of the batteries 102 reaches an overvoltage condition, the electronic switch 112 receives an electrical signal of the photocoupler 110 to short-circuit the fuse 111 with the battery cells 103, and the fuse 111 is blown, thereby interrupting the current flowing from the battery cells 103 to the power module 107. Thus, the power module 107 loses power and cannot provide power for the main control unit 106, the main control unit 106 cannot work with electricity, the interaction module 108 electrically connected to the main control unit 106 cannot work normally, the interaction module 108 generates a signal for prohibiting charging, and the interaction module 301 of the charging device 30 interrupts the charging current flowing to the battery unit 103 after recognizing the signal for prohibiting charging. In some embodiments, the electronic switch 112 may be a Field Effect Transistor (FET), a bipolar transistor (BJT).

Specifically, an input terminal of the photocoupler 110 is electrically connected to an output terminal of the sub monitoring circuit 105, and an output terminal of the photocoupler 110 is electrically connected to a control terminal of the electronic switch 112. One end of the fuse 111 is electrically connected to the positive electrode of the battery cell 103, and the other end is electrically connected to the power supply module 107. An input terminal of the electronic switch 112 is electrically connected to the other end of the fuse 111 near the power supply module 107, and an output terminal of the electronic switch 112 is electrically connected to the negative electrode of the battery cell 103. When the sub-monitoring circuit 105 monitors that any one of the batteries 102 reaches an overvoltage condition, the sub-monitoring circuit 105 sends an electrical signal to the input terminal of the photocoupler 110, that is, the sub-monitoring circuit 105 applies an electrical signal to the input terminal of the photocoupler 110 to make the light emitting source in the photocoupler 110 emit light, for example, a light emitting diode, and after the light is irradiated to the light receiver packaged together with the light emitting source in the photocoupler 110, a photocurrent is generated due to the photoelectric effect, and a current is drawn from the output terminal of the light receiver. The current is applied to the control end of the electronic switch 112 after being converted, the electronic switch 112 is controlled to be closed, so that the fuse 111 connected to the two ends of the electronic switch 112 is directly electrically connected with the battery unit 103, the fuse 111 is fused, the power supply line from the battery unit 103 to the power module 107 is disconnected, the power module 107 cannot provide electric energy for the main control unit 106, the interaction module 108 electrically connected with the main control unit 106 cannot normally work naturally, the interaction module 108 generates a charging prohibition signal, the interaction module of the charging device 30 sends the charging prohibition signal to the main control unit 302 of the charging device 30 after recognizing the charging prohibition signal, and the main control unit 303 controls the charging switch to be disconnected so as to interrupt the current from the power conversion module 304 and the external power source 40.

In some specific embodiments, the interaction module 108 of the battery pack and the interaction module 301 of the charging device 30 communicate information via a pulse-type signal. When the main control unit 106 in the battery pack 10 cannot be operated in a charged state because the power module 107 cannot supply power, a charge inhibiting signal, for example, a continuous high signal, is generated at the communication terminal D1 of the interaction module 108 of the battery pack 10, so that the continuous high signal is received at the communication terminal D2 of the charging device 30, and the main control unit 303 of the charging device 30 recognizes the charge inhibiting signal according to the continuous high signal. In some specific embodiments, when the high signal duration reaches 1s, the main control unit 303 of the charging device 30 confirms as the charge prohibition signal.

With the above-described secondary monitoring circuit 105, it is also possible to provide backup protection after the primary monitoring circuit is abnormal, so as to improve the safety of charging and/or discharging. When the secondary monitoring circuit 105 detects that any one of the batteries has reached an overvoltage condition, the protector electrically connected to the secondary monitoring circuit 105 disconnects the current flowing from the battery cell 103 by shorting the fuse 111 to the battery cell 103, thereby causing the interaction module 108 to generate a charging prohibition signal different from the normal communication signal, so that the charging device 30 interrupts the charging current flowing to the battery cell 103 in the battery pack 10 upon receiving the charging prohibition signal. By adopting the mode, the number of used components is small, the circuit design is simple, and the safety and the reliability are realized.

Referring to fig. 3, a battery integrated unit 10 according to another embodiment includes: a main monitoring circuit 104 that monitors the voltage of each battery 10 and/or the total voltage of the battery integration during the charge and discharge of the battery integration 10; a sub-monitoring circuit 105 that monitors the voltage of each battery 102 during charging of the battery integrated unit 10 to detect whether any of the batteries 102 reaches an overvoltage condition; a main control unit 106 for controlling a charging process of the battery integrated unit 10 during charging of the battery integrated unit 10 and controlling a current flowing to the smart electric vehicle 20 during discharging of the battery integrated unit 10; and a power module 107 electrically connected to the battery unit 103 for converting the electric energy of the battery unit 103 into electric energy for the main control unit 106.

The battery pack 10 further includes a protector that is electrically connected between the battery cells 103 and the charging device 30 and interrupts the charging current from the charging device 30 when the secondary monitoring circuit 105 detects that any one of the batteries 102 has reached an overvoltage condition.

In some specific embodiments, the protector comprises: a photocoupler 110 having an input end electrically connected to the sub monitoring circuit 105; a fuse 111 electrically connected to the charging circuit; and an electronic switch 112 electrically connected to the battery cell 103 and the fuse 111, wherein when the secondary monitoring circuit 105 detects that any one of the batteries reaches an overvoltage condition, the electronic switch 112 short-circuits the fuse 111 to the battery cell 103, and the fuse 111 interrupts a charging current flowing from the charging device 30 to the battery cell 103. In some embodiments, the electronic switch 112 may be a Field Effect Transistor (FET), a bipolar transistor (BJT).

Specifically, an input terminal of the photocoupler 110 is electrically connected to an output terminal of the sub monitoring circuit 105, and an output terminal of the photocoupler 110 is electrically connected to a control terminal of the electronic switch 112. One end of the fuse 111 is electrically connected to the positive electrode of the battery cell 103, and the other end is electrically connected to the power supply positive terminal B + of the battery integration 10. An input terminal of the electronic switch 112 is electrically connected to the other end of the fuse 111 near the positive power terminal B +, and an output terminal of the electronic switch 112 is electrically connected to the negative electrode of the battery cell 103. When the sub-monitoring circuit 105 monitors that any one of the batteries 102 reaches an overvoltage condition, the sub-monitoring circuit 105 sends an electrical signal to the input terminal of the photocoupler 110, that is, the sub-monitoring circuit 105 applies an electrical signal to the input terminal of the photocoupler 110 to make the light emitting source in the photocoupler 110 emit light, for example, a light emitting diode, and after the light is irradiated to the light receiver packaged together with the light emitting source in the photocoupler 110, a photocurrent is generated due to the photoelectric effect, and a current is drawn from the output terminal of the light receiver. The current is converted and applied to the control terminal of the electronic switch 112, and the electronic switch 112 is controlled to be closed, so that the fuse 111 connected to the two terminals of the electronic switch 112 and the battery unit 103 are directly electrically connected, causing the fuse 111 to be blown, thereby disconnecting the charging loop between the battery unit 103 and the charging device 10, so that the current from the charging device 30 is cut off, and the charging device 30 cannot charge the battery unit 103.

Optionally, the battery integration 10 may further include an interaction module 108 electrically connected to the main control unit 106 for information transfer with the interaction modules of the smart electric vehicle 20 and the charging device 30 during the charging and discharging of the battery integration 100.

Optionally, the battery manifold further includes a second fuse 112 electrically connected between the positive electrode of the battery cell 103 and the power module 107, providing additional protection.

With the above-described secondary monitoring circuit 105, it is also possible to provide backup protection after the primary monitoring circuit is abnormal, so as to improve the safety of charging and/or discharging. When the secondary monitoring circuit 105 detects that any one of the batteries has reached an overvoltage condition, a protector electrically connected to the secondary monitoring circuit 105 stops charging by shorting the fuse 111 to the battery cell 103 to disconnect the current from the charging device 30 to the battery cell 103 in the battery pack 10. By adopting the mode, the number of used components is small, the circuit design is simple, and the circuit is safe and reliable.

Through the mode, the two voltage monitoring circuits which are independent of each other are used, and after any one voltage monitoring circuit is abnormal, the other voltage monitoring circuit can be used, so that the charging and/or discharging safety is improved.

Particularly, the photoelectric coupler is used as a signal transmission medium, so that the isolation performance is good, the response speed is high, the transmission efficiency is high, the common-mode interference resistance is high, and the interference can be well inhibited and the noise can be well eliminated.

In some embodiments, a charging assembly includes the above-described battery pack and a charging device to which the battery pack is detachably attached.

In some embodiments, the intelligent electric vehicle comprises the above battery integration piece and the charging device, and the battery integration piece is detachably mounted to the charging device and the intelligent electric vehicle.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.