Vehicle energy recovery method, device, computer program product and vehicle

Abstract

The invention discloses a vehicle energy recovery method and device, a computer program product and a vehicle. Determining the maximum recoverable energy of the battery within the preset time, obtaining the actual power of the battery, and when the actual power is smaller than the rated power of the battery, integrating the actual power to obtain the energy exceeding the rated power of the battery. Based on the maximum recoverable energy and the energy exceeding the rated power of the battery, the energy recovery overload degree of the battery is obtained. And reducing the energy recovery power or keeping the energy recovery power unchanged based on the degree. For example, when the degree is higher than a preset value, it is indicated that energy recovery may be overloaded, and energy recovery power needs to be reduced at the moment. Otherwise, the current energy recovery is just appropriate, and the reduction is not needed. In this way, the current energy recovery condition can be judged according to the actual working condition of the battery, so that the energy recovery power is automatically adjusted to be more stable, and the phenomena that the vehicle speed is unstable and pause are relieved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a method, device, computer program product and vehicle for recovering vehicle energy. Background Art

[0002] The principle of energy recovery technology is to switch the vehicle motor mode from driving to power generation when the vehicle is coasting or braking, that is, converting kinetic energy into electrical energy and then storing it in the vehicle battery. This technology can not only reduce braking loss, but also reduce energy consumption and improve endurance.

[0003] In the prior art, the recovery power of energy recovery technology can be automatically controlled by parameters such as vehicle speed, throttle opening, and brake opening. However, for scenarios with large energy recovery requirements and long time, this method easily makes the recovery power unstable, resulting in unstable vehicle speed and frequent vehicle setbacks. Summary of the invention

[0004] Based on the above problems, the present application provides a method, device, computer program product and vehicle for vehicle energy recovery to stabilize the power of energy recovery and reduce the phenomenon of unstable vehicle speed and frequent vehicle stalling.

[0005] The present application discloses a method for vehicle energy recovery, the method comprising:

[0006] Determine the recoverable energy value of the battery based on a preset time; the recoverable energy value represents the maximum recoverable energy of the battery within the preset time;

[0007] Acquire the actual power of the battery, and when the actual power is less than the rated power of the battery, integrate the actual power to obtain an integration result; the integration result represents energy exceeding the rated power of the battery;

[0008] Based on the integration result and the recoverable energy value, obtaining a load factor of the battery; the load factor indicates a degree of overload of battery energy recovery;

[0009] The energy recovery power is reduced based on the load factor, or the energy recovery power is maintained unchanged.

[0010] Optionally, determining the recoverable energy value of the battery based on a preset time includes:

[0011] Obtaining the peak power of the battery and the preset time, the peak power being the maximum power of the battery within the preset time;

[0012] The recoverable energy value is obtained based on the product of the peak power and the preset time.

[0013] Optionally, obtaining the load factor of the battery based on the integration result and the recoverable energy value includes:

[0014] The load factor is obtained, where the load factor is the quotient of the integration result and the recoverable energy value.

[0015] Optionally, reducing the energy recovery power based on the load factor, or keeping the energy recovery power unchanged, includes:

[0016] When the load factor is greater than a preset threshold, reducing the energy recovery power;

[0017] When the load factor is less than or equal to the preset threshold, the energy recovery power is kept unchanged.

[0018] Optionally, reducing the energy recovery power includes:

[0019] Acquire the rated energy recovery power of the battery at the rated power, and acquire the peak energy recovery power of the battery at the peak power;

[0020] Based on a preset function, the peak energy recovery power is reduced to the rated energy recovery power.

[0021] Optionally, the acquiring the rated energy recovery power of the battery at the rated power, and acquiring the peak energy recovery power of the battery at the peak power, includes:

[0022] Obtain a first value, the first value being the sum of the rated power, the engine power, and the accessory power;

[0023] acquiring a second value, the second value being the sum of the peak power, the engine power, and the accessory power;

[0024] Determine a maximum value from the energy recovery required power and the first value, wherein the maximum value is the rated energy recovery power, and the energy recovery required power is a preset expected value;

[0025] A maximum value is determined from the energy recovery demand power and the second value, and the maximum value is the peak energy recovery power.

[0026] Optionally, the preset function is:

[0027]

[0028] Wherein, y is the final value of the peak energy recovery power, x is the duration of reducing the peak energy recovery power, t 总 To reduce the preset total duration of energy recovery power, P 峰值回收is the peak energy recovery power, P 额定回收 is the rated energy recovery power.

[0029] Based on the above-mentioned vehicle energy recovery method, the present application also discloses a vehicle energy recovery device, including: a determination unit, a comparison unit, an acquisition unit and an adjustment unit;

[0030] The determining unit is used to determine the recoverable energy value of the battery based on a preset time; the recoverable energy value represents the maximum recoverable energy of the battery within the preset time;

[0031] The comparison unit is used to obtain the actual power of the battery, and when the actual power is less than the rated power of the battery, integrate the actual power to obtain an integration result; the integration result represents energy exceeding the rated power of the battery;

[0032] The acquisition unit is used to acquire the load factor of the battery based on the integration result and the recoverable energy value; the load factor indicates the degree of overload of battery energy recovery;

[0033] The adjustment unit is used to reduce the energy recovery power based on the load factor, or keep the energy recovery power unchanged.

[0034] Optionally, the determining unit includes:

[0035] A time subunit, used to obtain the peak power of the battery and the preset time, wherein the peak power is the maximum power of the battery within the preset time;

[0036] A product subunit is used to obtain the recoverable energy value based on the product of the peak power and the preset time.

[0037] Optionally, the acquisition unit includes:

[0038] A division subunit is used to obtain the load factor, where the load factor is the quotient of the integral result and the recoverable energy value.

[0039] Optionally, the adjustment unit includes:

[0040] a reducing subunit, configured to reduce the energy recovery power when the load factor is greater than a preset threshold;

[0041] A maintaining subunit is used to keep the energy recovery power unchanged when the load factor is less than or equal to the preset threshold.

[0042] Optionally, the adjustment unit includes:

[0043] an acquisition subunit, configured to acquire the rated energy recovery power of the battery at the rated power, and acquire the peak energy recovery power of the battery at the peak power;

[0044] The adjustment subunit is used to reduce the peak energy recovery power to the rated energy recovery power based on a preset function.

[0045] Optionally, the acquisition subunit includes:

[0046] A first acquisition subunit, configured to acquire a first value, wherein the first value is the sum of the rated power, the engine power, and the accessory power;

[0047] A second acquisition subunit is used to acquire a second value, where the second value is the sum of the peak power, the engine power and the accessory power;

[0048] a first maximum subunit, configured to determine a maximum value from the energy recovery demand power and the first value, wherein the maximum value is the rated energy recovery power, and the energy recovery demand power is a preset expected value;

[0049] The second subunit is used to determine a maximum value from the energy recovery demand power and the second value, and the maximum value is the peak energy recovery power.

[0050] Optionally, the preset function is:

[0051]

[0052] Wherein, y is the final value of the peak energy recovery power, x is the duration of reducing the peak energy recovery power, t 总 To reduce the preset total duration of energy recovery power, P 峰值回收 is the peak energy recovery power, P 额定回收 is the rated energy recovery power.

[0053] Based on the above-mentioned vehicle energy recovery method, the present application also discloses a computer program product, wherein the computer program product includes a computer program, and when the computer program is executed by a processor, it is used to implement any of the above-mentioned methods.

[0054] Based on the above-mentioned vehicle energy recovery method, the present application also discloses a vehicle, including: a processor, a memory, and a system bus;

[0055] The processor and the memory are connected via the system bus;

[0056] The memory is used to store a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes the steps of any one of the above-mentioned vehicle energy recovery methods.

[0057] The present application discloses a method, device, computer program product and vehicle for vehicle energy recovery. Determine the maximum amount of energy that can be recovered by a battery within a preset time, obtain the actual power of the battery, and when the actual power is less than the rated power of the battery, integrate the actual power to obtain the energy that exceeds the rated power of the battery. Based on the maximum amount of energy that can be recovered and the energy that exceeds the rated power of the battery, obtain the degree of battery energy recovery overload. Based on this degree, reduce the energy recovery power, or keep the energy recovery power unchanged. For example, when the degree is higher than the preset value, it means that the energy recovery may be overloaded, and the energy recovery power needs to be reduced. Otherwise, it means that the current energy recovery is just right and does not need to be reduced. In this way, the current energy recovery status can be judged according to the actual working condition of the battery, so as to automatically adjust the energy recovery power to make it more stable and alleviate the phenomenon of unstable speed and setbacks of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0059] Figure 1a A schematic flow chart of a vehicle energy recovery method disclosed in an embodiment of the present application;

[0060] Figure 1b A schematic diagram of the recoverable energy value disclosed in the embodiments of the present application;

[0061] Figure 1c A schematic diagram of the integration results disclosed in the embodiments of the present application;

[0062] Figure 2a A schematic diagram of vehicle energy recovery in a scenario disclosed in an embodiment of the present application;

[0063] Figure 2b A schematic diagram of vehicle energy recovery in another scenario disclosed in an embodiment of the present application;

[0064] Figure 3 This is a schematic diagram of the structure of a vehicle energy recovery device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] Embodiment 1: This application discloses a method for vehicle energy recovery.

[0067] For details, please refer to Figure 1a A vehicle energy recovery method disclosed in this embodiment includes the following steps:

[0068] Step 101: Determine the recoverable energy value of the battery based on a preset time.

[0069] In the method of this embodiment, a suitable preset time can be flexibly determined according to the performance of the battery. For example, for a certain type of battery, the preset time can be set to 10 seconds. The maximum energy that can be recovered by the battery within this time is obtained, which is the recoverable energy value.

[0070] Specifically, after determining the preset time, the maximum power of the battery within the preset time is obtained, that is, the peak power of the battery. The recoverable energy value is obtained based on the product of the peak power and the preset time. In other words, this embodiment can obtain the maximum energy that the battery can recover before triggering the battery overload (the battery still works at peak power after exceeding the preset time). For example, within 10s, the maximum power of the battery is 10kW, then the recoverable energy value is the product of 10s and 10kW, 100kW·s, which can be converted to the standard unit of 1.67kW·h.

[0071] As an alternative method, Figure 1b As shown, the actual power of the battery is the black solid line, the rated power is the yellow dotted line, the peak power is the red dotted line, and the energy recovery demand is a preset expected value for energy recovery. Figure 1b The black dotted line in the figure shows the recoverable energy value. It can be seen that the actual power of the battery is constantly changing, and the process is not smooth.

[0072] Step 102: Acquire the actual power of the battery. When the actual power is less than the rated power of the battery, integrate the actual power to obtain an integration result.

[0073] In the method of this embodiment, the actual power of the battery can be obtained in real time, and compared with the normal capacity of the battery, that is, the rated power. When the actual power is less than the rated power, the actual power is integrated and calculated in real time. Specifically, it can be as follows:

[0074] W = ∫(P 实际 -P 频定 )dt (1)

[0075] Where W is the integral result, which represents the energy exceeding the rated power of the battery. 实际 is the actual power, P 额定 is the rated power.

[0076] In the method of this embodiment, when the actual power is greater than 0, the result of the previous integral calculation can be cleared. As an optional method, Figure 1c As shown, the blue irregular graphic area is the integration result.

[0077] Step 103: Based on the integration result and the recoverable energy value, obtain the load factor of the battery.

[0078] In the method of this embodiment, the load factor indicates the degree of overload of battery energy recovery, and is used as a criterion for determining whether the energy recovery power needs to be reduced in subsequent steps. When the battery energy recovery is overloaded, the energy recovery power is reduced to avoid battery overload while recovering energy as much as possible. Specifically, the quotient of the integral result and the recoverable energy value can be obtained, which is the load factor.

[0079] Step 104: reducing the energy recovery power based on the load factor, or keeping the energy recovery power unchanged.

[0080] In the method of this embodiment, it can be determined whether the energy recovery power needs to be reduced based on the load factor. Specifically, when the load factor is greater than a preset threshold, it is determined that the energy recovery power needs to be reduced, and when the load factor is not greater than the preset threshold, the energy recovery power is kept unchanged. In this case, after the energy recovery is exited, there is no need to reduce the energy recovery power.

[0081] Among them, the preset threshold is a value that can be set according to parameters such as vehicle model, vehicle weight and battery, so as to flexibly adapt to various vehicle conditions.

[0082] In the method of this embodiment, as an optional method, when reducing the energy recovery power, the rated energy recovery power of the battery at the rated power and the peak energy recovery power of the battery at the peak power can be first obtained. Specifically, the sum of the rated power of the battery, the engine power and the accessory power can be first obtained, which is the first value. The sum of the peak power of the battery, the engine power and the accessory power can be obtained, which is the second value. The engine power and the accessory power can be obtained in real time.

[0083] Then, according to the demand, an expected value is preset for energy recovery, that is, the energy recovery required power. The maximum value is determined from the energy recovery required power and the first value, and the maximum value is the rated energy recovery power. The maximum value is determined from the energy recovery required power and the second value, and the maximum value is the peak energy recovery power.

[0084] As an optional method, the process can be as follows:

[0085] P 频定回收 =max(P 能量回收需求 , (P 频定 +P 发动机 +P 附件 )) (2)

[0086] P 峰值回收 =max(P 能量回收需求 , (P 峰值 +P 发动机 +P 附件 )) (3)

[0087] Where P 额定回收 is the rated energy recovery power, P 峰值回收 is the peak energy recovery power, P 能量回收需求 is the energy recovery power requirement, P 峰值 is the peak power, P 发动机 is the engine power, P 附件 is the accessory power. When the vehicle is running purely on electricity, P 发动机 is 0.

[0088] In the method of this embodiment, in order to avoid frequent vehicle setbacks caused by sudden changes in energy recovery power, the energy recovery power can be controlled to smoothly transition from the peak value to the constant value, that is, the peak energy recovery power is controlled to smoothly decrease to the rated energy recovery power. This step can be implemented based on a preset function, which is as follows:

[0089]

[0090] In the formula, y is the final value of the peak energy recovery power, and x is the duration of reducing the peak energy recovery power, that is, the time from when the energy recovery power reduction is triggered to when the energy recovery power reduction ends. 总 The preset total duration for reducing the energy recovery power is the total time for the transition to complete.

[0091] Among them, t 总 is a variable value that can be automatically adjusted based on parameters such as slope, dynamic load, and road surface conditions. For example, t can be set based on the slope length parameter. 总 is 20s. And x must be less than t 总 .

[0092] The method of this embodiment can automatically adjust the energy recovery power according to the battery operating conditions, environment and other parameters, and smoothly transition the energy recovery power from the peak power to the rated power, so as to avoid frequent vehicle setbacks caused by repeated sudden changes in the energy recovery power. In scenarios where the energy recovery demand is large and the demand time is long, the problem of unstable energy recovery power caused by battery overload is reduced, and driving comfort is improved while recovering as much energy as possible. In addition, the method of this embodiment is applicable to pure electric and hybrid models. Under hybrid conditions, when the engine charges the battery, the above steps will also be triggered to improve the stability of hybrid energy recovery.

[0093] Example 2: This application discloses a scenario of vehicle energy recovery, please refer to Figure 2a In the method of this embodiment, the battery of the vehicle is fully charged to 30 kWh, the vehicle has an unladen weight of 2000 kg, and is driving downhill on a highway with a slope of 3%.

[0094] In the method of this embodiment, the threshold parameter is adjusted to 70%, t 总 The energy recovery power is reduced for 5s, that is, when the load factor is greater than 70%, the energy recovery power is reduced, and the process of reducing the energy recovery power is 5s in total. After reducing the energy recovery power, the power of this energy recovery does not change. Under this condition, it is necessary to recover as much energy as possible while keeping the vehicle acceleration within an acceptable range to avoid frequent acceleration and deceleration.

[0095] Example 3: This application discloses another scenario of vehicle energy recovery, please refer to Figure 2b In the method of this embodiment, the battery of the vehicle is fully charged to 30 kWh, the vehicle is fully loaded with 5000 kg, and is driving downhill on a highway with a slope of 5%.

[0096] In the method of this embodiment, the preset threshold is 10%, t 总 The energy recovery power is reduced for 20 seconds, that is, when the load factor is greater than 10%, the energy recovery power is reduced, and the total process of reducing the energy recovery power is 20 seconds. After reducing the energy recovery power, the energy recovery power of this time does not change. Under this working condition, the driver is more sensitive to acceleration, so it is necessary to give priority to ensuring driving stability.

[0097] Based on the vehicle energy recovery method disclosed in the above embodiment, this embodiment correspondingly discloses a vehicle energy recovery device. Figure 3 , the vehicle energy recovery device comprises: a determination unit 301, a comparison unit 302, an acquisition unit 303 and an adjustment unit 304;

[0098] The determining unit 301 is used to determine the recoverable energy value of the battery based on a preset time; the recoverable energy value represents the maximum recoverable energy of the battery within the preset time;

[0099] The comparison unit 302 is used to obtain the actual power of the battery, and when the actual power is less than the rated power of the battery, integrate the actual power to obtain an integration result; the integration result represents the energy exceeding the rated power of the battery;

[0100] The acquisition unit 303 is used to acquire the load factor of the battery based on the integration result and the recoverable energy value; the load factor indicates the degree of battery energy recovery overload;

[0101] The adjustment unit 304 is used to reduce the energy recovery power based on the load factor, or keep the energy recovery power unchanged.

[0102] Optionally, the determining unit 301 includes:

[0103] A time subunit, used to obtain the peak power of the battery and the preset time, wherein the peak power is the maximum power of the battery within the preset time;

[0104] A product subunit is used to obtain the recoverable energy value based on the product of the peak power and the preset time.

[0105] Optionally, the acquiring unit 303 includes:

[0106] A division subunit is used to obtain the load factor, where the load factor is the quotient of the integral result and the recoverable energy value.

[0107] Optionally, the adjusting unit 304 includes:

[0108] a reducing subunit, configured to reduce the energy recovery power when the load factor is greater than a preset threshold;

[0109] A maintaining subunit is used to keep the energy recovery power unchanged when the load factor is less than or equal to the preset threshold.

[0110] Optionally, the adjusting unit 304 includes:

[0111] an acquisition subunit, configured to acquire the rated energy recovery power of the battery at the rated power, and acquire the peak energy recovery power of the battery at the peak power;

[0112] The adjustment subunit is used to reduce the peak energy recovery power to the rated energy recovery power based on a preset function.

[0113] Optionally, the acquisition subunit includes:

[0114] A first acquisition subunit, configured to acquire a first value, wherein the first value is the sum of the rated power, the engine power, and the accessory power;

[0115] A second acquisition subunit is used to acquire a second value, where the second value is the sum of the peak power, the engine power and the accessory power;

[0116] a first maximum subunit, configured to determine a maximum value from the energy recovery demand power and the first value, wherein the maximum value is the rated energy recovery power, and the energy recovery demand power is a preset expected value;

[0117] The second subunit is used to determine a maximum value from the energy recovery demand power and the second value, and the maximum value is the peak energy recovery power.

[0118] Optionally, the preset function is:

[0119]

[0120] Wherein, y is the final value of the peak energy recovery power, x is the duration of reducing the peak energy recovery power, t 总 To reduce the preset total duration of energy recovery power, P 峰值回收 is the peak energy recovery power, P 额定回收 is the rated energy recovery power.

[0121] Based on the above-mentioned vehicle energy recovery method, the present application also discloses a computer program product, wherein the computer program product includes a computer program, and when the computer program is executed by a processor, it is used to implement any of the above-mentioned methods.

[0122] Based on the above-mentioned vehicle energy recovery method, the present application also discloses a vehicle, including: a processor, a memory, and a system bus;

[0123] The processor and the memory are connected via the system bus;

[0124] The memory is used to store a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes the steps of any one of the above-mentioned vehicle energy recovery methods.

[0125] The embodiments in this specification are described in a progressive manner. As for the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the methods.

[0126] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0127] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0128] The features described in the embodiments of this specification can be replaced or combined with each other, so that professional and technical personnel in this field can implement or use the present application.

[0129] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for vehicle energy recovery, characterized in that: include: Determining a recoverable energy value of the battery based on a preset time; The recoverable energy value represents the maximum recoverable energy of the battery within the preset time; Acquire the actual power of the battery, and when the actual power is less than the rated power of the battery, integrate the actual power to obtain an integration result; the integration result represents energy exceeding the rated power of the battery; Based on the integration result and the recoverable energy value, obtaining a load factor of the battery; the load factor indicates a degree of overload of battery energy recovery; The energy recovery power is reduced based on the load factor, or the energy recovery power is maintained unchanged.

2. The method according to claim 1, characterized in that The determining the recoverable energy value of the battery based on a preset time includes: Obtaining the peak power of the battery and the preset time, the peak power being the maximum power of the battery within the preset time; The recoverable energy value is obtained based on the product of the peak power and the preset time.

3. The method according to claim 1, characterized in that The obtaining the load factor of the battery based on the integration result and the recoverable energy value includes: The load factor is obtained, where the load factor is the quotient of the integration result and the recoverable energy value.

4. The method according to claim 1, characterized in that: The reducing the energy recovery power based on the load factor, or keeping the energy recovery power unchanged, comprises: When the load factor is greater than a preset threshold, reducing the energy recovery power; When the load factor is less than or equal to the preset threshold, the energy recovery power is kept unchanged.

5. The method according to claim 1, characterized in that: The reducing the energy recovery power comprises: Acquire the rated energy recovery power of the battery at the rated power, and acquire the peak energy recovery power of the battery at the peak power; Based on a preset function, the peak energy recovery power is reduced to the rated energy recovery power.

6. The method according to claim 5, characterized in that The obtaining of the rated energy recovery power of the battery at the rated power and the obtaining of the peak energy recovery power of the battery at the peak power includes: Obtain a first value, the first value being the sum of the rated power, the engine power, and the accessory power; acquiring a second value, the second value being the sum of the peak power, the engine power, and the accessory power; Determine a maximum value from the energy recovery required power and the first value, wherein the maximum value is the rated energy recovery power, and the energy recovery required power is a preset expected value; A maximum value is determined from the energy recovery demand power and the second value, and the maximum value is the peak energy recovery power.

7. The method according to claim 5, characterized in that The preset function is: Wherein, y is the final value of the peak energy recovery power, x is the duration of reducing the peak energy recovery power, t 总 To reduce the total duration of the energy recovery power, P 峰值回收 is the peak energy recovery power, P 额定回收 is the rated energy recovery power.

8. A vehicle energy recovery device, characterized in that: include: Determine unit, compare unit, obtain unit and adjust unit; The determining unit is used to determine the recoverable energy value of the battery based on a preset time; The recoverable energy value represents the maximum recoverable energy of the battery within the preset time; The comparison unit is used to obtain the actual power of the battery, and when the actual power is less than the rated power of the battery, integrate the actual power to obtain an integration result; the integration result represents energy exceeding the rated power of the battery; The acquisition unit is used to acquire the load factor of the battery based on the integration result and the recoverable energy value; the load factor indicates the degree of overload of battery energy recovery; The adjustment unit is used to reduce the energy recovery power based on the load factor, or keep the energy recovery power unchanged.

9. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, it is used to implement the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: include: Processor, memory, system bus; The processor and the memory are connected via the system bus; The memory is used to store a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes the steps of the vehicle energy recovery method according to any one of claims 1 to 7.

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