Electric vehicle power distribution method and system

Abstract

The present invention discloses a method and system for distributing power of an electric vehicle; wherein the method comprises: obtaining an electronic throttle signal of an electric vehicle, a maximum allowable discharge power of a high-voltage battery, a required power of high-voltage accessories, a maximum output torque of a motor drive system, and the efficiency of the motor drive system; calculating the requested torque under the current working condition according to the acquired data; in the motor drive system, after executing the requested torque, calculating the actual power consumption of the current motor controller; calculating the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; comparing the sum with the maximum allowable discharge power of the high-voltage battery, and redistributing the power according to the comparison result, so as to realize closed-loop control of the power of the electric vehicle. When the motor efficiency does not meet the calibration definition, the vehicle power type can be guaranteed and the battery over-discharge can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a power distribution method and system for electric vehicles. Background Art

[0002] The statements in this section merely mention background art related to the present invention and do not necessarily constitute prior art.

[0003] In cars, the size of the motor drive system is strictly required due to the limited installation space. Therefore, a sine wave permanent magnet synchronous motor is generally used in the pure electric vehicle drive system. It has significant advantages such as reliable operation, small size, light weight, low loss, high efficiency, and flexible shape and size. It can not only drive the whole vehicle, but also charge the battery through braking energy recovery. Torque control is mainly used in pure electric vehicles, so the vehicle controller needs to perform appropriate torque request control, which can not only ensure that the vehicle has appropriate power, but also avoid over-discharge alarm of the high-voltage battery.

[0004] At present, the existing strategy for power distribution during the electric process of the whole vehicle is that the VCU (Vehicle Control Unit) receives the allowed discharge power sent by the BMS (Battery Management System), subtracts the power required by the remaining high-voltage accessories such as DCDC (DC-DC converter), PTC (Positive Temperature control), AC (Air-condition compressor), etc. to obtain the power allowed to be used at the DC bus end of the MCU (Motor Control Unit), and then obtains the allowed requested torque of the current motor based on the efficiency and speed of the motor.

[0005] With the current control method, when the actual efficiency of the motor product does not meet the existing calibration value, the DC bus end will consume more power when the mechanical end consumes the same power. This will cause the battery to be over-discharged. On the one hand, it will damage the battery. On the other hand, it will cause the battery to be over-discharged and the power will be limited. The power of the whole vehicle will be greatly reduced. Summary of the invention

[0006] In order to solve the deficiencies of the prior art, the present invention provides a power distribution method and system for an electric vehicle; the technical method of this patent mainly solves the problem that when the motor efficiency does not meet the calibration definition, it can both ensure the vehicle power type and avoid over-discharge of the battery.

[0007] In a first aspect, the present invention provides a method for allocating power to an electric vehicle;

[0008] A power distribution method for an electric vehicle, comprising:

[0009] Obtain the electric vehicle's electronic throttle signal, the maximum allowable discharge power of the high-voltage battery, the required power of the high-voltage accessories, the maximum output torque of the motor drive system, and the efficiency of the motor drive system; calculate the requested torque under the current working condition based on the acquired data;

[0010] In the motor drive system, after executing the requested torque, the actual power consumed by the current motor controller is calculated;

[0011] Calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and reallocate the power based on the comparison result to achieve closed-loop power control of the electric vehicle.

[0012] In a second aspect, the present invention provides a power distribution system for an electric vehicle;

[0013] A power distribution system for an electric vehicle, comprising:

[0014] An acquisition module is configured to: acquire an electronic throttle signal of the electric vehicle, a maximum allowable discharge power of a high-voltage battery, a required power of a high-voltage accessory, a maximum output torque of a motor drive system, and an efficiency of the motor drive system; and calculate a requested torque under a current working condition based on the acquired data;

[0015] A calculation module is configured to: in a motor drive system, after executing a requested torque, calculate the actual power consumed by the current motor controller;

[0016] The comparison module is configured to: calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and reallocate power based on the comparison result to achieve closed-loop power control of the electric vehicle.

[0017] In a third aspect, the present invention further provides an electronic device, comprising:

[0018] a memory for non-transitory storage of computer-readable instructions; and

[0019] a processor for executing the computer readable instructions,

[0020] When the computer-readable instructions are executed by the processor, the method described in the first aspect is executed.

[0021] In a fourth aspect, the present invention further provides a storage medium that non-temporarily stores computer-readable instructions, wherein when the non-temporary computer-readable instructions are executed by a computer, the instructions of the method described in the first aspect are executed.

[0022] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, wherein the computer program is used to implement the method described in the first aspect when running on one or more processors.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention realizes a closed-loop control method for electric vehicle power, and the requested torque is obtained by parsing the electronic throttle signal, the maximum allowable discharge power of the high-voltage battery, the required power of the high-voltage accessories, the maximum output torque of the motor drive system, the efficiency of the motor drive system and other information. After the drive system executes the torque response, the actual required power of the current motor controller is calculated, and then compared with the current maximum allowable discharge power of the high-voltage battery. According to the comparison result, the power is redistributed to realize the closed-loop control of the entire high-voltage system circuit, so as to avoid the actual consumption at the motor controller end exceeding the current maximum discharge power of the battery, causing the BMS (Battery Management System) to directly limit the power to a very small value and affect the power of the whole vehicle, thereby improving the safety and reliability of the whole vehicle. When the motor efficiency does not meet the calibration definition, it can not only ensure the power type of the vehicle, but also avoid over-discharge of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of a high voltage electrical device of the first embodiment;

[0027] Figure 2 This is a power allocation flow chart of embodiment 1. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "include" and "have" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0031] In this embodiment, all data is obtained in compliance with laws and regulations and based on the user's consent, and is used legally.

[0032] Embodiment 1

[0033] This embodiment provides a method for allocating power to an electric vehicle;

[0034] like Figure 2 As shown, a power distribution method for an electric vehicle comprises:

[0035] S101: obtaining an electronic throttle signal of the electric vehicle, a maximum allowable discharge power of a high-voltage battery, a required power of high-voltage accessories, a maximum output torque of a motor drive system, and efficiency of the motor drive system; and calculating a requested torque under a current working condition based on the obtained data;

[0036] S102: In the motor drive system, after executing the requested torque, calculating the actual power consumed by the current motor controller;

[0037] S103: Calculating the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories;

[0038] The summation result is compared with the maximum allowable discharge power of the high-voltage battery, and the power is redistributed according to the comparison result to achieve closed-loop power control of the electric vehicle.

[0039] Further, S101: obtaining an electronic throttle signal of the electric vehicle, a maximum allowable discharge power of a high-voltage battery, a required power of high-voltage accessories, a maximum output torque of a motor drive system, and an efficiency of the motor drive system; and calculating a requested torque under a current working condition based on the obtained data; specifically including:

[0040] P1=(P-P0)*x,

[0041] Among them, P1 is the maximum allowable output power of the motor, P is the maximum allowable discharge power of the high-voltage battery, P0 is the total power of the high-voltage accessories, and x is the efficiency of the motor drive system;

[0042] T = P1*9550 / n,

[0043] Among them, T is the motor torque and n is the motor speed.

[0044] Furthermore, if Figure 1 As shown, the method is executed by a vehicle controller, which is respectively connected to a motor controller, a power manager and a high-voltage accessory manager; the motor controller is connected to the motor; the power manager is connected to the power battery; the high-voltage accessory manager is connected to a high-voltage electric heating module, an air-conditioning compressor and a DC converter.

[0045] Furthermore, the high-voltage accessories specifically include: a high-voltage electric heating module, an air-conditioning compressor and a DC converter.

[0046] Furthermore, the motor drive system includes a motor controller and a motor connected to each other.

[0047] Furthermore, the motor drive system efficiency refers to:

[0048] Motor output power:

[0049] P = T*n / 9550;

[0050] Where, T is the motor torque, n is the motor speed;

[0051] Motor controller input power:

[0052] P1 = U * I;

[0053] Among them, U is the input voltage and I is the input current

[0054] The efficiency of the motor drive system is: P / P 1.

[0055] Further, the S102: in the motor drive system, after executing the requested torque, calculating the actual power consumption of the current motor controller; specifically includes:

[0056] P = U * I;

[0057] Among them, U is the input voltage and I is the input current.

[0058] Further, the S103: calculating the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; comparing the sum with the maximum allowable discharge power of the high-voltage battery, and reallocating the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically includes:

[0059] S103-1: If the high voltage accessory requires power P 00 The actual power consumption P of the motor controller 10 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller;

[0060] S103-2: If the high voltage accessory requires power P 00 The actual power consumption P of the motor controller 10 If the sum of the power required by the high-voltage accessories is greater than the maximum allowable discharge power P of the high-voltage battery and the duration exceeds t1, the power of the AC (Air-condition compressor) and PTC (Positive Temperature control) in the high-voltage accessories is reduced to the calibrated value, and the power demand of the DCDC (DC-DC converter) remains unchanged, and the new high-voltage accessory power demand P is obtained. 01 ; Based on the power required by the new high-voltage accessories P 01 Implement power allocation (duration t1') to obtain the actual power consumption P of the new motor controller 11 .

[0061] It should be understood that the power required by the new high-voltage accessory P 01 Implement power allocation (duration t1') to obtain the actual power consumption P of the new motor controller 11 ; means:

[0062] The maximum allowable discharge power of the battery minus the power required by the new high-voltage accessories P 01 , get the actual power consumption P of the new motor controller 11 .

[0063] Further, the S103: calculating the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; comparing the sum with the maximum allowable discharge power of the high-voltage battery, and reallocating the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically also includes:

[0064] S103-3: If the new high voltage accessory requires power P 01 The actual power consumption of the new motor controller is P 11 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller;

[0065] S103-4: If the new high voltage accessory requires power P01 The actual power consumption of the new motor controller is P 11 If the sum of is greater than the maximum allowable discharge power P of the high-voltage battery, and the duration exceeds t2, the high-voltage accessories only retain the power demand of DCDC (DC-DC converter), set the power of AC (Positive Temperature control, high-voltage electric heating module) and PTC (Air-condition compressor) to zero, and obtain the new high-voltage accessory power demand P 02 ; Based on the power required by the new high-voltage accessories P 02 Implement power allocation (duration t2') to obtain the actual power consumption P of the new motor controller 12 .

[0066] The maximum allowable discharge power of the battery minus the required power of the new high-voltage accessories is the power consumption allowed by the new motor controller; the actual power consumption of the new motor controller is P 12 Specifically, it is the actual power consumed at the DC bus terminal of the motor controller.

[0067] Further, the S103: calculating the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; comparing the sum with the maximum allowable discharge power of the high-voltage battery, and reallocating the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically also includes:

[0068] S103-5: If the new high voltage accessory requires power P 02 The actual power consumption of the new motor controller is P 12 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller;

[0069] S103-6: If the new high voltage accessory requires power P 02 The actual power consumption of the new motor controller is P 12 If the sum of the values ​​is greater than the maximum allowable discharge power P of the high-voltage battery, and the duration exceeds t3, the power of AC (Air-condition compressor) and PTC (Positive Temperature control) is limited to zero, and the output voltage of DCDC (DC-DC converter) is reduced to the calibrated value (the minimum requirement of the calibrated value is to meet the low-voltage load voltage requirement of the whole vehicle), the current remains unchanged, and the new high-voltage accessory required power P is obtained. 03 ; Based on the power required by the new high-voltage accessories P03 Implement power allocation (duration t3') to obtain the actual power consumption P of the new motor controller 13 .

[0070] The maximum allowable discharge power of the battery minus the new high-voltage accessory power requirement is the power consumption allowed by the new motor controller.

[0071] Further, the S103: calculating the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; comparing the sum with the maximum allowable discharge power of the high-voltage battery, and reallocating the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically also includes:

[0072] S103-7: If the new high voltage accessory requires power P 03 The actual power consumption of the new motor controller is P 13 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller;

[0073] S103-8: If the new high voltage accessory requires power P 03 The actual power consumption of the new motor controller is P 13 If the sum of is greater than the maximum allowable discharge power P of the high-voltage battery, and the duration exceeds t4, the battery management system reports a high-voltage battery failure and reduces the maximum allowable discharge power P of the high-voltage battery at this time to a calibrated value.

[0074] First, after the vehicle is powered on, each controller reports no faults, the motor drive system can respond normally to the mode request of the vehicle controller and enter the drive mode, and the drive system can respond normally to the torque request of the vehicle controller.

[0075] The motor controller monitors its own temperature, operating mode, bus voltage, bus current, motor temperature, and motor speed in real time.

[0076] The motor drive system sends the maximum output torque of the current drive motor to the vehicle controller based on the current speed, motor temperature, motor controller temperature and motor external characteristic curve.

[0077] The motor drive system includes a motor controller and a motor. The efficiency requirements of the system will be determined at the beginning of the design of the motor drive system, that is, the drive system has different efficiencies at different speeds and torques, from which the efficiency distribution diagram of the motor drive system can be obtained. The vehicle controller makes this efficiency diagram into a table, and uses the table lookup method in the strategy to obtain the efficiency values ​​of the motor drive system under different speeds and torques.

[0078] Table 1 Table made based on efficiency diagram

[0079]

[0080] The high-voltage accessories will periodically send the detected high-voltage input voltage and current to the vehicle controller, and the power consumed by each can be obtained through calculation.

[0081] The high-voltage battery sends the current allowable peak discharge power to the vehicle controller through the Can network based on its own voltage, temperature and other information. After receiving the current allowable peak discharge power of the high-voltage battery, the vehicle controller subtracts the power consumed by the current high-voltage accessories from the maximum allowable discharge power of the battery to obtain the allowable power consumption of the motor controller in the current state. The efficiency value of the drive system in the current state is obtained by table lookup method, and the allowable output power of the motor end is calculated. The motor power calculation formula is then used to invert the torque that should be requested from the motor at the current speed.

[0082] The formula for calculating the motor output power is:

[0083] P = (T*n) / 9550,

[0084] Where T is the motor torque and n is the motor speed.

[0085] The vehicle controller uses the electronic throttle signal, the maximum allowable discharge power P of the high-voltage battery, and the required power P of the high-voltage accessories. 00 , the maximum output torque of the motor drive system, the motor drive system efficiency MAP and other information to parse the requested torque. After the drive system executes the torque response, the actual power consumption P of the DC bus terminal of the current motor controller is calculated. 10 .

[0086] During the operation of this control method, the time parameters t′1, t′2, and t′3 for changing the power allocated to the high-voltage accessories are all within the set range, only to ensure that the vehicle's power meets the demand. If it still does not return to normal within the specified time, it is necessary to report the fault and restore the required power of the high-voltage accessories.

[0087] Embodiment 2

[0088] This embodiment provides an electric vehicle power distribution system;

[0089] A power distribution system for an electric vehicle, comprising:

[0090] An acquisition module is configured to: acquire an electronic throttle signal of the electric vehicle, a maximum allowable discharge power of a high-voltage battery, a required power of a high-voltage accessory, a maximum output torque of a motor drive system, and an efficiency of the motor drive system; and calculate a requested torque under a current working condition based on the acquired data;

[0091] A calculation module is configured to: in a motor drive system, after executing a requested torque, calculate the actual power consumed by the current motor controller;

[0092] The comparison module is configured to: calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and reallocate power based on the comparison result to achieve closed-loop power control of the electric vehicle.

[0093] Embodiment 3

[0094] The present invention also provides an electronic device, comprising:

[0095] a memory for non-transitory storage of computer-readable instructions; and

[0096] a processor for executing the computer readable instructions,

[0097] When the computer-readable instructions are executed by the processor, the method described in Embodiment 1 is executed.

[0098] Embodiment 4

[0099] The present invention also provides a storage medium that non-temporarily stores computer-readable instructions, wherein when the non-temporary computer-readable instructions are executed by a computer, the instructions of the method described in Example 1 are executed.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for distributing power of an electric vehicle, characterized in that: include: Obtain the electric vehicle's electronic throttle signal, the maximum allowable discharge power of the high-voltage battery, the required power of the high-voltage accessories, the maximum output torque of the motor drive system, and the efficiency of the motor drive system; Calculate the requested torque under the current working condition based on the acquired data; In the motor drive system, after executing the requested torque, the actual power consumed by the current motor controller is calculated; Calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and redistribute the power according to the comparison result to achieve closed-loop power control of the electric vehicle; Calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and redistribute the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically include: If the high voltage accessory requires power P 00 The actual power consumption P of the motor controller 10 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller; If the high voltage accessory requires power P 00 The actual power consumption P of the motor controller 10 If the sum of the power required by the high-voltage accessories is greater than the maximum allowable discharge power P of the high-voltage battery and lasts longer than t1, the power of the air-conditioning compressor and the high-voltage electric heating module in the high-voltage accessories is reduced to the calibrated value, and the power demand of the DC converter remains unchanged, and the new high-voltage accessory power demand P is obtained. 01 ; Based on the power required by the new high-voltage accessories P 01 Implement power distribution and obtain the actual power consumption P of the new motor controller 11 .

2. The electric vehicle power distribution method according to claim 1, characterized in that: Calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and redistribute the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically include: If the new high-voltage accessory requires power P 01 The actual power consumption of the new motor controller is P 11 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller; If the new high-voltage accessory requires power P 01 The actual power consumption of the new motor controller is P 11 If the sum of is greater than the maximum allowable discharge power P of the high-voltage battery, and the duration exceeds t2, the high-voltage accessories only retain the power demand of the DC converter, and the power of the high-voltage electric heating module and the air-conditioning compressor is set to zero, and the new high-voltage accessory power demand P is obtained. 02 ; Based on the power required by the new high-voltage accessories P 02 Implement power distribution and obtain the actual power consumption P of the new motor controller 12 .

3. A method for distributing electric vehicle power as claimed in claim 2, characterized in that: Calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and redistribute the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically include: If the new high-voltage accessory requires power P 02 The actual power consumption of the new motor controller is P 12 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller; If the new high-voltage accessory requires power P 02 The actual power consumption of the new motor controller is P 12 If the sum of the values ​​is greater than the maximum allowable discharge power P of the high-voltage battery, and the duration exceeds t3, the power of the air-conditioning compressor and the high-voltage electric heating module is limited to zero, the output voltage of the DC converter is reduced to the calibrated value, and the current remains unchanged, and the new high-voltage accessory required power P is obtained. 03 ; Based on the power required by the new high-voltage accessories P 03 Implement power distribution and obtain the actual power consumption P of the new motor controller 13 .

4. A method for distributing electric vehicle power as claimed in claim 3, characterized in that: Calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and redistribute the power according to the comparison result to achieve closed-loop power control of the electric vehicle; specifically include: If the new high-voltage accessory requires power P 03 The actual power consumption of the new motor controller is P 13 If the sum of is less than or equal to the maximum allowable discharge power P of the high-voltage battery, the vehicle maintains the previous power distribution, and the motor drive system responds to the torque request of the vehicle controller; If the new high-voltage accessory requires power P 03 The actual power consumption of the new motor controller is P 13 If the sum of is greater than the maximum allowable discharge power P of the high-voltage battery, and the duration exceeds t4, the battery management system reports a high-voltage battery failure and reduces the maximum allowable discharge power P of the high-voltage battery at this time to a calibrated value.

5. The electric vehicle power distribution method according to claim 1, characterized in that: The method is executed by a vehicle controller, which is respectively connected to a motor controller, a power manager and a high-voltage accessory manager; the motor controller is connected to the motor; the power manager is connected to the power battery; the high-voltage accessory manager is connected to a high-voltage electric heating module, an air-conditioning compressor and a DC converter.

6. The electric vehicle power distribution method according to claim 1, characterized in that: The motor drive system includes a motor controller and a motor which are connected to each other.

7. An electric vehicle power distribution system, based on an electric vehicle power distribution method as claimed in any one of claims 1 to 6, characterized in that: include: An acquisition module is configured to: acquire an electronic throttle signal of the electric vehicle, a maximum allowable discharge power of a high-voltage battery, a required power of a high-voltage accessory, a maximum output torque of a motor drive system, and an efficiency of the motor drive system; and calculate a requested torque under a current working condition based on the acquired data; A calculation module is configured to: in a motor drive system, after executing a requested torque, calculate the actual power consumed by the current motor controller; The comparison module is configured to: calculate the sum of the actual power consumption of the motor controller and the power consumption of the high-voltage accessories; compare the sum with the maximum allowable discharge power of the high-voltage battery, and reallocate power based on the comparison result to achieve closed-loop power control of the electric vehicle.

8. An electronic device, comprising: a memory for non-transitory storage of computer readable instructions; as well as a processor for executing the computer readable instructions, Wherein, when the computer-readable instructions are executed by the processor, the method described in any one of claims 1 to 6 is executed.

9. A storage medium, characterized in that it non-temporarily stores computer-readable instructions, wherein: When the non-transitory computer-readable instructions are executed by a computer, the instructions of the method according to any one of claims 1 to 6 are executed.

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