Power Battery Power Control Method and Device

Abstract

The present invention discloses a power control method and device for a power battery, relating to the technical field of power batteries. During the acceleration process of an electric vehicle, when the state of charge (SOC) of the power battery is lower than a first value, the present invention determines the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value. Since the second power value is small, the discharge power of the power battery will start to decrease from a small value during the acceleration process, resulting in less consumption of the power battery and improving problems such as power attenuation and undervoltage of the power battery.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and particularly to a method and device for controlling the power of a power battery. Background Art

[0002] During the driving of an electric vehicle, the discharge power of the power battery decreases as the SOC decreases. The current power control strategy of the power battery has certain defects. When the SOC of the power battery is low and the vehicle accelerates, problems such as power attenuation and undervoltage of the power battery will occur, affecting the user's driving experience and even the safety of the vehicle and the driver. Therefore, a new method for controlling the power of the power battery is needed to improve the problems of power attenuation and undervoltage of the power battery in the above situation. Summary of the Invention

[0003] The present invention solves the technical problem of how to improve the power attenuation and undervoltage of the power battery by providing a method and device for controlling the power of the power battery.

[0004] On the one hand, the embodiments of the present invention provide the following technical solutions:

[0005] A method for controlling the power of a power battery, comprising:

[0006] During the acceleration of an electric vehicle, obtaining the SOC of the power battery and the stepping time of the accelerator pedal;

[0007] If the SOC of the power battery is higher than a preset first value, determining the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset first power value;

[0008] If the SOC of the power battery is lower than the first value, determining the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value, and the second power value is less than the first power value.

[0009] Preferably, the determining the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value, includes:

[0010] Before the stepping time of the accelerator pedal reaches a preset first duration, setting the discharge power to the second power value;

[0011] After the stepping time of the accelerator pedal reaches the first duration, setting the discharge power to a preset third power value, and the third power value is less than the second power value.

[0012] Preferably, before obtaining the SOC of the power battery and the stepping time of the accelerator pedal during the accelerating process of the electric vehicle, it further includes:

[0013] During the driving process of the electric vehicle, predict the driving state of the vehicle;

[0014] If the driving state is acceleration, it is determined that the electric vehicle is in the accelerating process.

[0015] Preferably, after predicting the driving state of the vehicle during the driving process of the electric vehicle, it further includes:

[0016] If the driving state is uniform speed, obtain the SOC of the power battery, the stepping time of the accelerator pedal, and the vehicle speed;

[0017] If the SOC of the power battery is lower than a preset second value and the vehicle speed is lower than a preset speed threshold, determine the discharge power according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset fourth power value, and the fourth power value is less than the second power value.

[0018] Preferably, determining the discharge power according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset fourth power value includes:

[0019] Before the stepping time of the accelerator pedal reaches a preset second duration, set the discharge power to the fourth power value;

[0020] After the stepping time of the accelerator pedal reaches the second duration, set the discharge power to a preset third power value, and the third power value is less than the fourth power value.

[0021] Preferably, after predicting the driving state of the vehicle during the driving process of the electric vehicle, it further includes:

[0022] If the driving state is deceleration, obtain the SOC of the power battery and the stepping time of the brake pedal;

[0023] If the SOC of the power battery is higher than a preset third value, determine the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases;

[0024] If the SOC of the power battery is lower than the third value, determine the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset sixth power value, and the sixth power value is greater than the fifth power value.

[0025] Preferably, determining the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset fifth power value, includes:

[0026] Before the stepping time of the brake pedal reaches a preset third duration, setting the feedback power to the fifth power value;

[0027] After the stepping time of the brake pedal reaches the third duration, setting the feedback power to a preset seventh power value, and the seventh power value is less than the fifth power value.

[0028] On the other hand, the embodiments of the present invention also provide the following technical solutions:

[0029] A power battery power control device includes:

[0030] A vehicle data acquisition module, configured to acquire the SOC of the power battery and the stepping time of the accelerator pedal during the acceleration driving process of the electric vehicle;

[0031] A discharge power control module, configured to, if the SOC of the power battery is higher than a preset first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset first power value;

[0032] The discharge power control module is further configured to, if the SOC of the power battery is lower than the first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value, and the second power value is less than the first power value.

[0033] On the other hand, the embodiments of the present invention also provide the following technical solutions:

[0034] An electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the above-mentioned any power battery power control method is implemented.

[0035] On the other hand, the embodiments of the present invention also provide the following technical solutions:

[0036] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned any power battery power control method is implemented.

[0037] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0038] During the acceleration of an electric vehicle, when the state of charge (SOC) of the power battery is lower than a first value, the discharge power of the power battery is determined according to the depression time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value. Since the second power value is small, the discharge power of the power battery will start to decline from a small value during the acceleration process, which consumes less power from the power battery and can improve problems such as power attenuation and undervoltage of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a flowchart of the power battery power control method in the embodiment of the present invention;

[0041] Figure 2 It is a schematic structural diagram of the power battery power control device in the embodiment of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The embodiments of the present invention provide a power battery power control method and device, which solve the technical problem of how to improve the power attenuation and undervoltage of the power battery.

[0043] To better understand the technical solutions of the present invention, the following will detail the technical solutions of the present invention in combination with the drawings of the specification and specific embodiments.

[0044] First, it should be noted that the term "and / or" appearing in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0045] As Figure 1 shown, the power battery power control method of this embodiment includes:

[0046] Step S1, during the acceleration of the electric vehicle, obtain the SOC of the power battery and the depression time of the accelerator pedal;

[0047] Step S2, if the SOC of the power battery is higher than a preset first value, determine the discharge power of the power battery according to the depression time of the accelerator pedal, so that the discharge power gradually decreases from a preset first power value;

[0048] Step S3, if the SOC of the power battery is lower than the first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value, and the second power value is less than the first power value.

[0049] Among them, steps S2 and S3 are parallel steps.

[0050] In the traditional power control strategy of the power battery, the discharge power of the power battery is directly determined according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset first power value. It is difficult to ensure the power attenuation problem and undervoltage problem in any SOC interval. During the driving of the electric vehicle, the SOC of the power battery will gradually decrease, and thus the discharge power of the power battery will also decrease. It can be considered that it gradually decreases from the first power value and is applicable to all driving states of the vehicle. The first power value can be 400kW. Determining the discharge power of the power battery according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from the preset first power value includes: before the stepping time of the accelerator pedal reaches 5s, set the discharge power to 400kW (for 5s); after the stepping time of the accelerator pedal reaches 5s and before it reaches 15s, set the discharge power to 360kW (for 10s); after the stepping time of the accelerator pedal reaches 15s and before it reaches 45s, set the discharge power to 180kW (for 30s); after the stepping time of the accelerator pedal reaches 45s and before it reaches 105s, set the discharge power to 130kW (for 60s); after the stepping time of the accelerator pedal reaches 105s, set the discharge power to 100kW and keep it during the acceleration process.

[0051] Since the first power value is relatively large, the discharge power of the power battery will start to decrease from a relatively large value during the acceleration process. If the SOC of the power battery is low at the start of acceleration, the discharge power of the power battery starting to decrease from a relatively high value consumes a large amount of the power battery and will cause problems such as power attenuation and undervoltage of the power battery.

[0052] In step S3, the first value can be 50%, and when the SOC of the power battery is lower than 50%, it can be considered that the SOC of the power battery is low. The second power value can be 180kW. In this way, in this embodiment, when the SOC of the power battery is lower than the first value, the discharge power of the power battery is determined according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from the preset second power value. Since the second power value is less than the first power value, the discharge power of the power battery will start to decrease from a relatively small value during the acceleration process, consuming less power of the power battery, and can improve problems such as power attenuation and undervoltage of the power battery.

[0053] Specifically, in step S3, determining the discharge power of the power battery according to the depression time of the accelerator pedal so that the discharge power gradually decreases from a preset second power value, including but not limited to: before the depression time of the accelerator pedal reaches a preset first duration, setting the discharge power to the second power value; after the depression time of the accelerator pedal reaches the first duration, setting the discharge power to a preset third power value, where the third power value is less than the second power value. Among them, the first duration can be 30s, and the third power value can be 100kW. That is, before the depression time of the accelerator pedal reaches 30s, set the discharge power to 180kW (for 30s); after the depression time of the accelerator pedal reaches 30s, set the discharge power to 100kW and keep it that way. Of course, it can also be divided into multiple descending stages, which will not be exemplified one by one here.

[0054] Before implementing step S1 in this embodiment, it is also necessary to determine the driving state of the vehicle. It can be understood that in this embodiment, steps S2 and S3 can be performed after the electric vehicle starts to accelerate, but this is to protect the power battery after starting to accelerate, without prior protection. The high consumption of the power battery caused by acceleration has already started, and the effect of improving problems such as power attenuation and undervoltage of the power battery cannot reach the best.

[0055] Therefore, preferably before step S1 in this embodiment, the power battery power control method further includes: during the driving process of the electric vehicle, predicting the driving state of the vehicle; if the driving state is acceleration, it is determined that the electric vehicle is in an accelerating driving process. Among them, during the driving process of the vehicle on the highway, if there is no vehicle in the left lane and the vehicle speed of the vehicle in front in this lane is slow, it can be predicted that the driving state of the vehicle is acceleration, that is, the vehicle will accelerate next. This can anticipate the driving state of the vehicle in advance, determine that the electric vehicle is in an accelerating driving process before the vehicle accelerates, that is, perform steps S2 and S3 before the vehicle accelerates, achieving prior protection of the power battery and improving the effect of improving problems such as power attenuation and undervoltage of the power battery. It should be noted that in this embodiment, it is defaulted that the vehicle will definitely accelerate after predicting that the driving state of the vehicle is acceleration.

[0056] Of course, if the SOC of the power battery is low during the constant-speed driving of the electric vehicle, the consumption of the power battery is also relatively large when the discharge power of the power battery starts to decrease from a relatively high value. To improve problems such as power attenuation and undervoltage of the power battery during the constant-speed driving of the electric vehicle, preferably after predicting the driving state of the vehicle during the driving process of the electric vehicle, the power battery power control method further includes:

[0057] If the predicted driving state of the vehicle is uniform, obtain the SOC of the power battery, the stepping time of the accelerator pedal, and the vehicle speed; if the SOC of the power battery is lower than a preset second value and the vehicle speed is lower than a preset speed threshold, determine the discharge power according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset fourth power value, and the fourth power value is less than the second power value; if the SOC of the power battery is higher than the second value or the vehicle speed is higher than the speed threshold, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a first power value.

[0058] Among them, if the cruise control mode is activated during the vehicle's driving on the highway, the predicted driving state of the vehicle is uniform. The second value can be 50%, the speed threshold can be 80 km / h, and the fourth power value can be 130 kW. If the vehicle speed is higher than the speed threshold, that is, the vehicle speed is relatively high, making the discharge power of the power battery start to decline from a small value will cause the discharge power of the power battery to be unable to meet the needs of uniform driving. Therefore, in this case, the discharge power also gradually decreases from the first power value.

[0059] Specifically, the determining the discharge power according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset fourth power value includes: before the stepping time of the accelerator pedal reaches a preset second duration, set the discharge power to the fourth power value; after the stepping time of the accelerator pedal reaches the second duration, set the discharge power to a preset third power value, and the third power value is less than the fourth power value. The second duration can be 30 s, and the fourth power value can be 130 kW, that is, before the stepping time of the accelerator pedal reaches 30 s, set the discharge power to 130 kW (for 30 s); after the stepping time of the accelerator pedal reaches 30 s, set the discharge power to 100 kW and keep it. Of course, it can also be divided into multiple descending stages, and no examples are given here one by one. It can be understood that this embodiment can also predict that the vehicle is about to drive at a uniform speed before the vehicle drives at a uniform speed, that is, it realizes the pre-protection of the power battery when the vehicle drives at a uniform speed, and improves the effect of improving problems such as power attenuation and undervoltage of the power battery. It should be noted that this embodiment defaults that the vehicle will definitely drive at a uniform speed after predicting that the driving state of the vehicle is uniform.

[0060] Furthermore, during the driving of the electric vehicle, after predicting the driving state of the vehicle, the power battery power control method of this embodiment further includes:

[0061] If the predicted driving state of the vehicle is deceleration, obtain the SOC of the power battery and the stepping time of the brake pedal; if the SOC of the power battery is higher than a preset third value, determine the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset fifth power value; if the SOC of the power battery is lower than the third value, determine the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset sixth power value, and the sixth power value is greater than the fifth power value. Among them, if the vehicle in front decelerates or a red light appears ahead on an urban road during the vehicle driving process, the predicted driving state of the vehicle is deceleration. The third value can be 50%, the fifth power value can be 180 kW, and the sixth power value can be 300 kW.

[0062] When the vehicle decelerates, the power battery will recover energy, and the SOC of the power battery will increase. Generally, the SOC of the power battery is not considered, and the feedback power of the power battery is directly determined according to the stepping time of the brake pedal, so that the feedback power of the power battery gradually decreases from a preset sixth power value. However, when the SOC of the power battery is relatively large, if the feedback power of the power battery starts to decrease from a large value, the SOC of the power battery will increase rapidly, causing a great impact on the power battery. In this embodiment, when the SOC of the power battery is higher than the third value, the feedback power of the power battery is determined according to the stepping time of the brake pedal, so that the feedback power gradually decreases from the fifth power value, and the feedback power of the power battery starts to decrease from a small value, which can reduce the impact on the power battery caused by energy recovery during vehicle deceleration. It can be understood that this embodiment can also predict that the vehicle is about to decelerate before the vehicle decelerates, that is, it realizes the pre - protection of the power battery when the vehicle decelerates, and improves the effect of improving problems such as power attenuation and over - voltage of the power battery. It should be noted that in this embodiment, it is default that the vehicle will surely decelerate after the predicted driving state of the vehicle is decelerated.

[0063] Specifically, the determining the feedback power of the power battery according to the stepping time of the brake pedal so that the feedback power gradually decreases from a preset fifth power value includes, but is not limited to: before the stepping time of the brake pedal reaches a preset third duration, set the feedback power to the fifth power value; after the stepping time of the brake pedal reaches the third duration, set the feedback power to a preset seventh power value, and the seventh power value is less than the fifth power value. Among them, the third duration can be 30 s, and the seventh power value can be 80 kW, that is, before the stepping time of the brake pedal reaches 30 s, set the feedback power to 180 kW (for 30 s); after the stepping time of the brake pedal reaches 30 s, set the feedback power to 80 kW and keep it all the time.

[0064] Specifically, determining the feedback power of the power battery according to the stepping time of the brake pedal so that the feedback power gradually decreases from a preset sixth power value includes, but is not limited to: before the stepping time of the brake pedal reaches 5 s, setting the feedback power to 300 kW (lasting for 5 s); after the stepping time of the brake pedal reaches 5 s and before it reaches 15 s, setting the feedback power to 250 kW (lasting for 10 s); after the stepping time of the brake pedal reaches 15 s and before it reaches 45 s, setting the feedback power to 180 kW (lasting for 30 s); after the stepping time of the brake pedal reaches 45 s and before it reaches 105 s, setting the feedback power to 130 kW (lasting for 60 s); after the stepping time of the brake pedal reaches 105 s, setting the feedback power to 80 kW and maintaining it throughout the braking process.

[0065] As Figure 2 shown, this embodiment also provides a power battery power control device, including:

[0066] A vehicle data acquisition module, configured to acquire the SOC of the power battery and the stepping time of the accelerator pedal during the acceleration of the electric vehicle;

[0067] A discharge power control module, configured to, if the SOC of the power battery is higher than a preset first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset first power value;

[0068] The discharge power control module is further configured to, if the SOC of the power battery is lower than the first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset second power value, and the second power value is less than the first power value.

[0069] When the SOC of the power battery in the power battery power control device of this embodiment is lower than the first value, the discharge power of the power battery is determined according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset second power value. Since the second power value is less than the first power value, the discharge power of the power battery will start to decline from a relatively small value during the acceleration process, resulting in less consumption of the power battery and improving problems such as power attenuation and undervoltage of the power battery.

[0070] Based on the same inventive concept as the power battery power control method described above, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the steps of any of the power battery power control methods described above.

[0071] Among them, for the bus architecture (represented by the bus), the bus can include any number of interconnected buses and bridges, which link together various circuits including one or more processors represented by the processor and the memory represented by the memory. The bus can also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and thus will not be further described herein. The bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter can be the same element, i.e., the transceiver, which provides a unit for communicating with various other devices on the transmission medium. The processor is responsible for managing the bus and general processing, while the memory can be used to store data used by the processor when performing operations.

[0072] Since the electronic device introduced in this embodiment is the electronic device adopted for implementing the power battery power control method in the embodiments of the present invention, based on the power battery power control method introduced in the embodiments of the present invention, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, how this electronic device implements the method in the embodiments of the present invention will not be described in detail herein. As long as the electronic device adopted by those skilled in the art for implementing the power battery power control method in the embodiments of the present invention falls within the scope of protection of the present invention.

[0073] Based on the same inventive concept as the above power battery power control method, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements any of the above power battery power control methods.

[0074] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0075] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and combinations of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device generate means for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or one or more of the blocks.

[0076] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including instruction means that implement the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or one or more of the blocks.

[0077] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or one or more of the blocks.

[0078] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A power control method for a power battery, characterized in that, Including: During the acceleration process of the electric vehicle, obtain the SOC of the power battery and the stepping time of the accelerator pedal; If the SOC of the power battery is higher than a preset first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset first power value; If the SOC of the power battery is lower than the first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value, and the second power value is less than the first power value.

2. The power battery power control method according to claim 1, characterized in that The determining the discharge power of the power battery according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset second power value includes: Before the stepping time of the accelerator pedal reaches a preset first duration, set the discharge power to the second power value; After the stepping time of the accelerator pedal reaches the first duration, set the discharge power to a preset third power value, and the third power value is less than the second power value.

3. The power battery power control method according to claim 1, characterized in that, Before obtaining the SOC of the power battery and the stepping time of the accelerator pedal during the acceleration process of the electric vehicle, it further includes: During the driving process of the electric vehicle, predict the driving state of the vehicle; If the driving state is acceleration, it is determined that the electric vehicle is in the acceleration process.

4. The power battery power control method according to claim 3, wherein, After predicting the driving state of the vehicle during the driving process of the electric vehicle, it further includes: If the driving state is uniform speed, obtain the SOC of the power battery, the stepping time of the accelerator pedal, and the vehicle speed; If the SOC of the power battery is lower than a preset second value and the vehicle speed is lower than a preset speed threshold, determine the discharge power according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset fourth power value, and the fourth power value is less than the second power value.

5. The power battery power control method according to claim 4, characterized in that, The determining the discharge power according to the stepping time of the accelerator pedal so that the discharge power gradually decreases from a preset fourth power value includes: Before the stepping time of the accelerator pedal reaches a preset second duration, set the discharge power to the fourth power value; After the stepping time of the accelerator pedal reaches the second duration, set the discharge power to a preset third power value, and the third power value is less than the fourth power value.

6. The power battery power control method according to claim 3, wherein After predicting the driving state of the vehicle during the driving process of the electric vehicle, it further includes: If the driving state is deceleration, obtain the SOC of the power battery and the stepping time of the brake pedal; If the SOC of the power battery is higher than a preset third value, determine the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset fifth power value; If the SOC of the power battery is lower than the third value, determine the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset sixth power value, and the sixth power value is greater than the fifth power value.

7. The power battery power control method according to claim 6, characterized in that, Determining the feedback power of the power battery according to the stepping time of the brake pedal, so that the feedback power gradually decreases from a preset fifth power value, includes: Before the stepping time of the brake pedal reaches a preset third duration, setting the feedback power to the fifth power value; After the stepping time of the brake pedal reaches the third duration, setting the feedback power to a preset seventh power value, and the seventh power value is less than the fifth power value.

8. A power control device for a power battery, characterized in that, Includes: A vehicle data acquisition module, configured to acquire the SOC of the power battery and the stepping time of the accelerator pedal during the acceleration driving process of the electric vehicle; A discharge power control module, configured to, if the SOC of the power battery is higher than a preset first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset first power value; The discharge power control module is further configured to, if the SOC of the power battery is lower than the first value, determine the discharge power of the power battery according to the stepping time of the accelerator pedal, so that the discharge power gradually decreases from a preset second power value, and the second power value is less than the first power value.

9. An electronic device, characterized in that, Includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the power battery power control method described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium. When the computer program is executed by the processor, it implements the power battery power control method described in any one of claims 1-7.

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