阅读说明：本技术 一种新能源汽车高压配电箱的上电方法、装置及设备 (Power-on method, device and equipment for high-voltage distribution box of new energy automobile ) 是由 张玉良 袁贵和 付照德 杨俊鹏 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种新能源汽车高压配电箱的上电方法装置、设备、计算机可读存储介质及一种新能源汽车高压配电箱,通过接收预充电压信号；判断所述预充电压信号是否超过额定电压的第一比值；当超过所述额定电压的第一比值后,发送吸合信号至电机接触器,使所述电机接触器吸合,所述电机接触器对应的电机控制器上电；发送所述吸合信号后经过第一预设时间,发送预充断路信号至电机预充接触器,使所述电机预充接触器断开；所述电机预充接触器与预充电阻串联。本发明通过所述电机预充接触器对所述电机控制器进行小电流充电,至所述电机控制器中的电容近乎充满,实现了对工作安全的保障,即兼顾了低成本与高工作稳定性、安全性。(The invention discloses a power-on method device, equipment, a computer readable storage medium and a new energy automobile high-voltage distribution box, wherein the power-on method device, the equipment and the computer readable storage medium receive a pre-charging voltage signal; judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not; when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor; after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series. According to the invention, the motor controller is charged with small current through the motor pre-charging contactor until the capacitor in the motor controller is almost full, so that the work safety is guaranteed, namely the low cost, the high work stability and the safety are considered.)

1. The power-on method of the new energy automobile high-voltage distribution box is characterized by comprising the following steps:

receiving a pre-charge voltage signal;

judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not;

when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor;

after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series.

2. The method for powering up the high-voltage distribution box of the new energy vehicle according to claim 1, wherein the receiving the pre-charge voltage signal comprises:

receiving a BMS pull-in signal;

and sending a pre-charging pull-in signal and receiving the pre-charging voltage signal after a second preset time after the BMS pull-in signal is received.

3. The method for powering on the high-voltage distribution box of the new energy automobile according to claim 1, wherein the step of judging whether the pre-charge voltage signal exceeds a first ratio of rated voltage comprises the following steps:

judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage within a third preset time;

accordingly, when the first ratio of the rated voltage is not exceeded within the third preset time, an alarm signal is sent.

4. The utility model provides a new energy automobile high tension switchgear's last electric installation which characterized in that includes:

the receiving module is used for receiving a pre-charging voltage signal;

the judging module is used for judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not;

the sending module is used for sending a pull-in signal to the motor contactor after the first ratio of the rated voltage is exceeded, so that a motor controller corresponding to the click contactor is powered on;

and the circuit breaking module is used for sending a pre-charging circuit breaking signal to the motor pre-charging contactor after a first preset time after sending the attraction signal so as to disconnect the motor pre-charging contactor.

5. The power-on device for the high-voltage distribution box of the new energy automobile according to claim 4, wherein the receiving module comprises:

the electric connection determining unit is used for receiving BMS pull-in signals;

and the attraction unit is used for sending a pre-charging attraction signal and receiving the pre-charging pressure signal after receiving the BMS attraction signal and after a second preset time.

6. The power-on device for the high-voltage distribution box of the new energy automobile according to claim 4, wherein the judging module comprises:

the time-limited judging unit is used for judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage within a third preset time;

and the time-limited alarm unit is used for sending an alarm signal when the first ratio of the rated voltage is not exceeded in the third preset time.

7. The utility model provides a new energy automobile high voltage distributor box's last electronic equipment which characterized in that includes:

a memory for storing a computer program;

a processor for implementing the steps of the method for powering up the hv power distribution box of a new energy vehicle according to any of claims 1 to 3 when executing the computer program.

8. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the power-on method for the new energy vehicle high voltage distribution box according to any one of claims 1 to 3.

9. A high-voltage distribution box of a new energy automobile is characterized by comprising a motor controller, a motor main circuit and a motor pre-charging circuit;

the motor main circuit comprises a motor contactor, and the motor pre-charging circuit comprises a pre-charging resistor and a motor pre-charging contactor which are connected in series;

the motor main circuit and the motor pre-charging circuit are connected in parallel;

and the external circuit supplies power to the motor controller through the motor main circuit and/or the motor pre-charging circuit.

10. The new energy vehicle high voltage distribution box according to claim 9, wherein the new energy vehicle high voltage distribution box comprises a plurality of motor controllers;

correspondingly, the motor pre-charging circuit comprises a plurality of motor pre-charging contactors; the motor pre-charging contactors correspond to the motor controllers one by one;

the second ends of the pre-charging resistors are respectively connected to the first ends of the motor pre-charging contactors;

and the second ends of the motor pre-charging contactors are connected with corresponding motor controllers.

Technical Field

The invention relates to the field of power supply of new energy automobiles, in particular to a power-on method, a power-on device, power-on equipment, a computer readable storage medium and a new energy automobile high-voltage distribution box.

Background

The new energy automobile power system has the characteristics of high voltage, large instantaneous energy and the like, and has higher requirements on the safety of the whole automobile and parts in the using process. The higher the voltage platform of the new energy automobile is, the higher the requirements on the voltage resistance level, the safety and the like of parts and the whole automobile are, and the cost of the parts and the whole automobile is increased. For a new energy automobile with a low-voltage platform, in a reasonable cost range, how to improve the use safety of a high-voltage electrical appliance is of great importance.

As described above, the high-voltage system of the current new energy vehicle has the problems of large instantaneous current and easy component damage, and the method for solving the problem in the prior art is to use high-cost precision components, but the cost is greatly increased.

Therefore, how to combine the production cost and the working safety of the circuit element becomes a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a power-on method, a power-on device, power-on equipment, a computer readable storage medium and a new energy automobile high-voltage distribution box, and aims to solve the problem that production cost and working safety of circuit elements cannot be considered in the prior art.

In order to solve the technical problem, the invention provides a power-on method of a high-voltage distribution box of a new energy automobile, which comprises the following steps:

receiving a pre-charge voltage signal;

judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not;

when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor;

after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series.

Optionally, in the power-on method of the new energy vehicle high-voltage distribution box, the receiving a pre-charge voltage signal includes:

receiving a BMS pull-in signal;

and sending a pre-charging pull-in signal and receiving the pre-charging voltage signal after a second preset time after the BMS pull-in signal is received.

Optionally, in the power-on method of the new energy vehicle high-voltage distribution box, the determining whether the pre-charge voltage signal exceeds a first ratio of a rated voltage includes:

judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage within a third preset time;

accordingly, when the first ratio of the rated voltage is not exceeded within the third preset time, an alarm signal is sent.

The utility model provides a new energy automobile high tension switchgear's last electric installation, includes:

the receiving module is used for receiving a pre-charging voltage signal;

the judging module is used for judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not;

the sending module is used for sending a pull-in signal to the motor contactor after the first ratio of the rated voltage is exceeded, so that a motor controller corresponding to the click contactor is powered on;

and the circuit breaking module is used for sending a pre-charging circuit breaking signal to the motor pre-charging contactor after a first preset time after sending the attraction signal so as to disconnect the motor pre-charging contactor.

Optionally, in the power-on device of the new energy vehicle high-voltage distribution box, the receiving module includes:

the electric connection determining unit is used for receiving BMS pull-in signals;

and the attraction unit is used for sending a pre-charging attraction signal and receiving the pre-charging pressure signal after receiving the BMS attraction signal and after a second preset time.

Optionally, in the power-on device of the new energy vehicle high-voltage distribution box, the determining module includes:

the time-limited judging unit is used for judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage within a third preset time;

and the time-limited alarm unit is used for sending an alarm signal when the first ratio of the rated voltage is not exceeded in the third preset time.

The utility model provides a new energy automobile high tension switchgear's last electronic equipment, includes:

a memory for storing a computer program;

and the processor is used for realizing the steps of the power-on method of the new energy automobile high-voltage distribution box when executing the computer program.

A computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method for powering up a new energy vehicle high voltage distribution box as described in any one of the above.

A high-voltage distribution box of a new energy automobile comprises a motor controller, a motor main circuit and a motor pre-charging circuit;

the motor main circuit comprises a motor contactor, and the motor pre-charging circuit comprises a pre-charging resistor and a motor pre-charging contactor which are connected in series;

the motor main circuit and the motor pre-charging circuit are connected in parallel;

and the external circuit supplies power to the motor controller through the motor main circuit and/or the motor pre-charging circuit.

Optionally, in the new energy vehicle high-voltage distribution box, the new energy vehicle high-voltage distribution box includes a plurality of motor controllers;

correspondingly, the motor pre-charging circuit comprises a plurality of motor pre-charging contactors; the motor pre-charging contactors correspond to the motor controllers one by one;

the second ends of the pre-charging resistors are respectively connected to the first ends of the motor pre-charging contactors;

and the second ends of the motor pre-charging contactors are connected with corresponding motor controllers.

The power-on method of the new energy automobile high-voltage distribution box provided by the invention comprises the steps of receiving a pre-charging voltage signal; judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not; when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor; after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series.

Before the motor controller is formally electrified, the motor controller is charged with low current through the motor pre-charging contactor, the low current in the pre-charging stage can be adjusted through the pre-charging resistor, the voltage of the motor controller in the pre-charging stage (namely, the pre-charging voltage signal) is further monitored, when the pre-charging voltage signal exceeds a first ratio of rated voltage, the capacitor in the motor controller is considered to be almost fully charged at the moment, the motor main circuit controlled by the motor contactor is switched to normally supply power at the moment, the situation that the large current impacts the capacitor in the motor controller to burn the capacitor is avoided, the pre-charging circuit is disconnected after the first preset time after the attraction signal is sent, the phenomenon that the motor contactor does not act in time and the pre-charging circuit is not attracted when the pre-charging circuit is disconnected is avoided, the problem of damage to the internal electric elements of the motor controller is caused, and on the premise of not needing to replace a large number of high-cost components, the guarantee of work safety is realized, namely low cost, high work stability and safety are considered. The invention also provides a power-on device, equipment, a computer readable storage medium and the new energy automobile high-voltage distribution box, which have the beneficial effects.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic flow chart of an embodiment of a power-on method of a new energy automobile high-voltage distribution box according to the present invention;

fig. 2 is a schematic flow chart of another embodiment of the power-on method of the new energy automobile high-voltage distribution box provided by the invention;

fig. 3 is a schematic structural diagram of an embodiment of a power-on device of a new energy automobile high-voltage distribution box provided by the invention;

fig. 4 is a schematic structural diagram of an embodiment of the new energy vehicle high-voltage distribution box provided by the invention;

fig. 5 is a schematic structural diagram of another specific embodiment of the new energy automobile high-voltage distribution box provided by the invention.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a method for electrifying a high-voltage distribution box of a new energy automobile, wherein the flow schematic diagram of one specific embodiment is shown in fig. 1, which is called as a first specific embodiment and comprises the following steps:

s101: a pre-charge voltage signal is received.

The pre-charging voltage signal is a signal representing the voltage of the motor controller in a pre-charging state, and is acquired once every preset interval time.

In the process of receiving the pre-charging voltage signal, the motor controller is in a pre-charging state, namely the motor contactor is disconnected, the motor pre-charging contactor is closed, and the motor controller acquires current through a motor pre-charging circuit where the motor pre-charging contactor is located.

S102: and judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not.

That is, it is determined whether the magnitude of the pre-charge voltage signal exceeds a certain proportion of the rated voltage, and of course, it is not always necessary to multiply the rated voltage and the first ratio to obtain the determination criterion each time, but a specific voltage value corresponding to the first ratio of the rated voltage may be pre-stored as an operation threshold in advance, and the obtained pre-charge voltage signal is directly compared with the operation threshold each time.

S103: and after the first ratio of the rated voltage is exceeded, sending a pull-in signal to the motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor.

When the first ratio of the rated voltage is exceeded, the capacitor in the motor controller accumulates certain charges, and even if the motor main circuit is switched to the motor main circuit in normal operation to supply power to the motor controller, components such as a capacitor in the motor controller cannot break down or be damaged due to suddenly high current.

S104: after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series.

In the step, only after sending the first preset time of the attraction signal, the pre-charging open-circuit signal is sent to the motor contactor to reserve the reaction time, so that the motor contactor is ensured to be disconnected after attraction, the pre-charging contactor of the motor is prevented from generating electric sparks between the opening and the closing of the contactor, and the production safety is improved.

In addition, the motor pre-charging contactor is connected with a pre-charging resistor in series, and the pre-charging resistor is used for reducing the current flowing through the motor pre-charging circuit, so that the phenomenon that the excessive current directly impacts the internal elements of the motor controller to cause element damage is avoided.

Still further, the receiving a precharge voltage signal includes:

a1: and receiving a BMS pull-in signal.

The BMS is a battery management system, and the BMS attraction signal refers to a signal that the high-voltage distribution box is connected with an external charger when the new energy automobile is charged.

A2: and sending a pre-charging pull-in signal and receiving the pre-charging voltage signal after a second preset time after the BMS pull-in signal is received.

In the preferred embodiment, the pre-charging attracting signal is further sent at a second preset time after the BMS attracting signal is received, so that an action time is reserved for the connection between the high-voltage distribution box and an external charger; the pre-charging attracting signal is a signal for attracting the motor pre-charging contactor to enter a pre-charging state.

The power-on method of the new energy automobile high-voltage distribution box provided by the invention comprises the steps of receiving a pre-charging voltage signal; judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not; when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor; after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series. Before the motor controller is formally electrified, the motor controller is charged with low current through the motor pre-charging contactor, the low current in the pre-charging stage can be adjusted through the pre-charging resistor, the voltage of the motor controller in the pre-charging stage (namely, the pre-charging voltage signal) is further monitored, when the pre-charging voltage signal exceeds a first ratio of rated voltage, the capacitor in the motor controller is considered to be almost fully charged at the moment, the motor main circuit controlled by the motor contactor is switched to normally supply power at the moment, the situation that the large current impacts the capacitor in the motor controller to burn the capacitor is avoided, the pre-charging circuit is disconnected after the first preset time after the attraction signal is sent, the phenomenon that the motor contactor does not act in time and the pre-charging circuit is not attracted when the pre-charging circuit is disconnected is avoided, the problem of damage to the internal electric elements of the motor controller is caused, and on the premise of not needing to replace a large number of high-cost components, the guarantee of work safety is realized, namely low cost, high work stability and safety are considered.

On the basis of the first specific embodiment, the determining step is further improved to obtain a second specific embodiment, a schematic flow diagram of which is shown in fig. 2, and the method includes:

s201: a pre-charge voltage signal is received.

S202: and judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage within a third preset time.

S203: and when the first ratio of the rated voltage is not exceeded in the third preset time, sending an alarm signal.

S204: and when the first ratio of the rated voltage is not exceeded within the third preset time, sending a pull-in signal to the motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor.

S205: after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series.

In this embodiment, a time is defined for determining whether the first ratio of the rated voltage is exceeded, and the motor pre-charging circuit is a designed circuit, so that the charging time required for reaching the first ratio is also determined when the charging voltage is known, and therefore, if the charging voltage exceeds the third preset time, the pre-charging voltage signal does not reach the preset value yet, a circuit fault is indicated, and at this time, an alarm signal is timely sent to notify a worker to process the signal, so that the working safety of the device can be greatly improved.

It should be noted that steps S203 and S204 in the present embodiment have no precedence relationship, and only in two different cases after the determination of S202 is performed, the positions of S203 and S204 can be exchanged, which does not affect the effect of the present application.

The power-on device of the new energy automobile high-voltage distribution box provided by the embodiment of the invention is introduced below, and the power-on device of the new energy automobile high-voltage distribution box described below and the power-on method of the new energy automobile high-voltage distribution box described above can be referred to correspondingly.

Fig. 3 is a structural block diagram of a power-on device of a new energy vehicle high-voltage distribution box according to an embodiment of the present invention, which is referred to as a third embodiment, and referring to fig. 3, the power-on device of the new energy vehicle high-voltage distribution box may include:

a receiving module 100, configured to receive a pre-charge voltage signal;

the judging module 200 is configured to judge whether the pre-charge voltage signal exceeds a first ratio of a rated voltage;

the sending module 300 is configured to send a pull-in signal to the motor contactor after the first ratio of the rated voltage is exceeded, so that a motor controller corresponding to the click contactor is powered on;

and the circuit breaking module 400 is configured to send a pre-charging circuit breaking signal to the motor pre-charging contactor after a first preset time elapses after the attraction signal is sent, so that the motor pre-charging contactor is turned off.

As a preferred embodiment, the receiving module 100 includes:

the electric connection determining unit is used for receiving BMS pull-in signals;

and the attraction unit is used for sending a pre-charging attraction signal and receiving the pre-charging pressure signal after receiving the BMS attraction signal and after a second preset time.

As a preferred implementation, the determining module 200 includes:

the time-limited judging unit is used for judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage within a third preset time;

and the time-limited alarm unit is used for sending an alarm signal when the first ratio of the rated voltage is not exceeded in the third preset time.

The power-on device of the new energy vehicle high-voltage distribution box of the embodiment is used for implementing the power-on method of the new energy vehicle high-voltage distribution box, and therefore specific embodiments of the power-on device of the new energy vehicle high-voltage distribution box can be found in the foregoing embodiments of the power-on method of the new energy vehicle high-voltage distribution box, for example, the receiving module 100, the determining module 200, the sending module 300, and the disconnecting module 400 are respectively used for implementing steps S101, S102, S103, and S104 in the power-on method of the new energy vehicle high-voltage distribution box, so that the specific embodiments thereof may refer to descriptions of corresponding respective embodiments of the respective portions, and are not repeated herein.

The power-on device of the new energy automobile high-voltage distribution box provided by the invention is used for receiving a pre-charging voltage signal through the receiving module 100; the judging module 200 is configured to judge whether the pre-charge voltage signal exceeds a first ratio of a rated voltage; the sending module 300 is configured to send a pull-in signal to the motor contactor after the first ratio of the rated voltage is exceeded, so that a motor controller corresponding to the click contactor is powered on; and the circuit breaking module 400 is configured to send a pre-charging circuit breaking signal to the motor pre-charging contactor after a first preset time elapses after the attraction signal is sent, so that the motor pre-charging contactor is turned off. Before the motor controller is formally electrified, the motor controller is charged with low current through the motor pre-charging contactor, the low current in the pre-charging stage can be adjusted through the pre-charging resistor, the voltage of the motor controller in the pre-charging stage (namely, the pre-charging voltage signal) is further monitored, when the pre-charging voltage signal exceeds a first ratio of rated voltage, the capacitor in the motor controller is considered to be almost fully charged at the moment, the motor main circuit controlled by the motor contactor is switched to normally supply power at the moment, the situation that the large current impacts the capacitor in the motor controller to burn the capacitor is avoided, the pre-charging circuit is disconnected after the first preset time after the attraction signal is sent, the phenomenon that the motor contactor does not act in time and the pre-charging circuit is not attracted when the pre-charging circuit is disconnected is avoided, the problem of damage to the internal electric elements of the motor controller is caused, and on the premise of not needing to replace a large number of high-cost components, the guarantee of work safety is realized, namely low cost, high work stability and safety are considered.

The utility model provides a new energy automobile high tension switchgear's last electronic equipment, includes:

a memory for storing a computer program;

and the processor is used for realizing the steps of the power-on method of the new energy automobile high-voltage distribution box when executing the computer program. The power-on method of the new energy automobile high-voltage distribution box provided by the invention comprises the steps of receiving a pre-charging voltage signal; judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not; when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor; after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series. Before the motor controller is formally electrified, the motor controller is charged with low current through the motor pre-charging contactor, the low current in the pre-charging stage can be adjusted through the pre-charging resistor, the voltage of the motor controller in the pre-charging stage (namely, the pre-charging voltage signal) is further monitored, when the pre-charging voltage signal exceeds a first ratio of rated voltage, the capacitor in the motor controller is considered to be almost fully charged at the moment, the motor main circuit controlled by the motor contactor is switched to normally supply power at the moment, the situation that the large current impacts the capacitor in the motor controller to burn the capacitor is avoided, the pre-charging circuit is disconnected after the first preset time after the attraction signal is sent, the phenomenon that the motor contactor does not act in time and the pre-charging circuit is not attracted when the pre-charging circuit is disconnected is avoided, the problem of damage to the internal electric elements of the motor controller is caused, and on the premise of not needing to replace a large number of high-cost components, the guarantee of work safety is realized, namely low cost, high work stability and safety are considered.

A computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method for powering up a new energy vehicle high voltage distribution box as described in any one of the above. The power-on method of the new energy automobile high-voltage distribution box provided by the invention comprises the steps of receiving a pre-charging voltage signal; judging whether the pre-charging voltage signal exceeds a first ratio of rated voltage or not; when the first ratio of the rated voltage is exceeded, sending a pull-in signal to a motor contactor to pull in the motor contactor, and electrifying a motor controller corresponding to the motor contactor; after a first preset time passes after the actuation signal is sent, sending a pre-charging open-circuit signal to a motor pre-charging contactor to disconnect the motor pre-charging contactor; the motor pre-charging contactor is connected with the pre-charging resistor in series. Before the motor controller is formally electrified, the motor controller is charged with low current through the motor pre-charging contactor, the low current in the pre-charging stage can be adjusted through the pre-charging resistor, the voltage of the motor controller in the pre-charging stage (namely, the pre-charging voltage signal) is further monitored, when the pre-charging voltage signal exceeds a first ratio of rated voltage, the capacitor in the motor controller is considered to be almost fully charged at the moment, the motor main circuit controlled by the motor contactor is switched to normally supply power at the moment, the situation that the large current impacts the capacitor in the motor controller to burn the capacitor is avoided, the pre-charging circuit is disconnected after the first preset time after the attraction signal is sent, the phenomenon that the motor contactor does not act in time and the pre-charging circuit is not attracted when the pre-charging circuit is disconnected is avoided, the problem of damage to the internal electric elements of the motor controller is caused, and on the premise of not needing to replace a large number of high-cost components, the guarantee of work safety is realized, namely low cost, high work stability and safety are considered.

The invention also provides a new energy automobile high-voltage distribution box, the structural schematic diagram of one specific embodiment of which is shown in fig. 4, namely the fourth specific embodiment, and the fourth specific embodiment comprises a motor controller G1, a motor main circuit and a motor pre-charging circuit;

the motor main circuit comprises a motor contactor K1, and the motor pre-charging circuit comprises a pre-charging resistor R1 and a motor pre-charging contactor K2 which are connected in series;

the motor main circuit and the motor pre-charging circuit are connected in parallel;

an external circuit supplies power to the motor controller G1 through the motor main circuit and/or the motor pre-charge circuit.

The new energy automobile high-voltage distribution box is used for executing the power-on method of the new energy automobile high-voltage distribution box, and specific steps can refer to the foregoing and are not described herein again.

Wherein the resistance value of the pre-charging resistor R1 is in a range of 20 ohms to 60 ohms, inclusive, such as any one of 20.0 ohms, 46.3 ohms, or 60.0 ohms.

The rated current of the electrode pre-charge contactor ranges from 12 amps to 40 amps, inclusive, such as any of 12.0 amps, 26.4 amps, or 40.0 amps.

The following exemplifies a practical assembly scheme of the new energy automobile high-voltage distribution box, and monitors, manages and distributes high-voltage electricity input by a power battery.

Introduction of a high-pressure system: the whole vehicle adopts a 72V voltage platform, and the battery adopts a lithium iron phosphate battery with the power of 160A.h and 11.52 kW.h.

High-voltage distribution load parameters: the rated power of the motor is 7.5kW, the rated power of a vehicle-mounted charger is 1.8kW, the rated power of DC is 1.2kW, and the total rated power of the business is 4kW (wherein the rated power of the high-pressure fog gun motor is 2kW, and the rated power of the business water pump is 2 kW).

The high-voltage distribution system consists of a DC charging circuit, a service circuit and a motor driving circuit, and the system parts mainly comprise a fuse, a contactor, a pre-charging resistor R1 and a power management control panel.

The whole vehicle adopts a lithium iron phosphate battery and a 72V low-voltage platform, and after receiving a power-on demand, the BMS attracts a battery pack negative contactor. The distribution box starts to distribute power after detecting the input voltage of the power battery:

1. a main loop: after the BMS actuates the negative contactor for 100ms, the power management control panel actuates the main pre-charging contactor, the pre-charging voltage is detected to be more than or equal to 90% of the rated voltage within 1000ms, the pre-charging is successful, the power management control panel actuates the main contactor, the time delay is 100ms, the main pre-charging relay is disconnected, and the power-on of the main circuit is completed.

2. Service loop: after the main pre-charging contactor is disconnected for 100ms, the power management control panel actuates the service pre-charging contactor, the pre-charging voltage detected within 1000ms is larger than or equal to 90% of the rated voltage, the pre-charging is successful, the power management control panel actuates the main contactor, the service pre-charging relay is disconnected after the time delay of 100ms, and the service loop is powered on. The service loop is divided into two paths, one path supplies power to the service motor controller G1, and the other path supplies power to other services and is controlled by the service 2 contactor.

3. A DC loop: after the service pre-charging contactor is disconnected for 1s, the DC contactor is closed, the DC-DC converter is directly electrified, a pre-charging resistor R1 is arranged in the DC-DC converter, the pre-charging resistor R1 is not needed to be connected in the distribution box, the DC-DC converter is started to work after the DC-DC converter is electrified and self-checked normally, and detected input and output voltages are sent to the whole vehicle CAN network in a message mode. And after the power management control board detects that the DC-DC output voltage is normal, judging that the high voltage is successfully electrified, and sending a discharge permission command.

4. A charging loop: the charging loop and the DC-DC share the safety, after the whole vehicle gun is inserted and the CC signal is detected, the charging process is started, the leakage sensor detects the insulation resistance of the whole vehicle and the charger after the DC contactor is closed, the BMS closes the negative electrode contactor of the battery pack after no abnormity occurs, the DC-DC starts to start, and the BMS sends the charging required voltage and current to start charging.

The selection of parts of new energy automobile high voltage distribution box gives a concrete implementation scheme below, wherein, owing to adopted the pre-charge circuit, can select for use the spare part that the cost is lower, of course, also can select according to actual need, and this application does not do the restriction here.

Designing parts;

and selecting parts such as a safety device, a contactor, a pre-charging resistor R1 and the like according to the load parameters of the parts of the whole vehicle.

Load insurance: the DC-charging circuit adopts 32A insurance, the service circuit adopts 80A insurance and the motor driving circuit adopts 160A insurance.

A load contactor: the motor selects a 160A contactor, the service selects an 80A contactor, the charging selects a 40A contactor, the main pre-charging contactor 40A and the service pre-charging contactor 40A.

Pre-charge resistor R1: the capacitor 700 muF of the driving motor controller G1 and the capacitor 1300 muF of the service motor controller G1300 muF are selected from the pre-charging resistor R1 of 30 omega and 100W, and the pre-charging time is calculated to be less than 100 ms.

Secondly, designing a mechanical structure of the distribution box;

high-voltage electricity in the battery pack is input into a distribution box through a lead, the positive electrode and the negative electrode of the distribution box are respectively and uniformly distributed by a 20mmX3mm copper busbar, and the positive electrode of the distribution box is respectively connected with each loop fuse and a pre-charging resistor R1. After the over-insurance, the contactors are respectively connected, and high-voltage distribution is controlled according to requirements.

For high-voltage components with large capacitors, before power-on, an auxiliary pre-charging loop is required, 2 pre-charging contactors are added and arranged behind a main contactor and a service contactor. And meanwhile, a service contactor is arranged for controlling the service loop water pump to supply power.

The distribution box shell adopts aluminum alloy die-casting, and the box lid and cross the line hole and need beat the sealed processing of gluing.

Thirdly, designing an embedded software and hardware development scheme;

the power management control panel comprises a power supply, a voltage signal acquisition module, a logic control module and a CAN communication module. By collecting the voltage, it is monitored whether the fuse state of each circuit has been precharged successfully. The power consumption requirement of the whole vehicle is received, and the high-voltage system management is realized by attracting different contactors. The power management board receives a power-on command of the whole vehicle through the CAN communication module, and simultaneously sends the state of a contactor of the distribution box, the pre-charging voltage and other information to the whole vehicle controller through the CAN network, so that data interaction is carried out in real time.

As a preferred embodiment, referring to fig. 5, the structural schematic diagram of the new energy vehicle high voltage distribution box includes a plurality of motor controllers G1;

accordingly, the motor pre-charge circuit includes a plurality of the motor pre-charge contactors K2; the motor pre-charging contactor K2 corresponds to the motor controller G1 one by one;

the second ends of the pre-charging resistors R1 are respectively connected to the first ends of the motor pre-charging contactors K2;

the second ends of a plurality of motor pre-charging contactors K2 are connected with corresponding motor controllers G1.

In the preferred embodiment, the motor pre-charging circuit simultaneously performs the pre-charging function of a plurality of motor controllers G1, and a plurality of motor controllers G1 share one pre-charging resistor R1, so that an independent pre-charging resistor R1 is not provided for each motor pre-charging circuit corresponding to the motor controller G1, and the production cost is greatly reduced.

Referring to fig. 5, fig. 5 includes a plurality of motor controllers, which can be broadly divided into two categories, i.e., a driving motor controller G1 and a service motor controller G22, wherein the service motor controller is divided into a service 1 motor controller G21 and a service 2 motor controller G22, corresponding to different driving motors, the motor pre-charging contactor is divided into K21 and K22, and the motor contactors are divided into K11 and K12, and it can be seen from the figure that whether the service 2 motor controller G22 is connected to a circuit is controlled by the motor contactor K12' alone. In addition, this new energy automobile high voltage distribution box in the mode that should be concrete still includes maintenance switch, 300A electric current hall sensor, working resistor 1 and working resistor 2, and wherein, two working resistors are used for adjusting the working current size of corresponding motor controller.

The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The invention provides a new energy automobile high-voltage distribution box, and a power-on method, a power-on device, power-on equipment, a computer readable storage medium and a new energy automobile high-voltage distribution box which are provided by the invention are described in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.