Power battery power correction method, vehicle and storage medium

Abstract

The application provides a power battery power correction method, a vehicle and a storage medium. The method comprises the following steps: obtaining an initial discharge power of a power battery; obtaining a minimum single battery voltage and a minimum single battery temperature in the power battery, and determining a single battery target power based on the minimum single battery voltage and the minimum single battery temperature; and correcting the initial discharge power based on the single battery target power to obtain a final discharge power of the power battery. The minimum single battery voltage and the minimum single battery temperature in the power battery are introduced to correct the voltage closed-loop control, so as to correct the initial discharge power of the power battery, and avoid the risk of excessive power output and battery over-discharge when the single battery voltage value of the power battery is too low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a power battery power correction method, a vehicle and a storage medium. BACKGROUND

[0002] The power battery control device can manage the power battery to meet the power usage demand of the vehicle and monitor the state of the power battery. At present, the power battery control device usually determines the discharge power of the power battery according to the temperature, SOC (state of charge) and the like of the power battery. However, this method may cause the risk of excessive power output and battery over-discharge in some specific situations, for example, when the voltage value of a single battery in the power battery is too low. SUMMARY

[0003] The embodiments of the present application provide a power battery power correction method, a vehicle and a storage medium to solve the problem that the prior art may cause the risk of excessive power output and battery over-discharge when the voltage value of a single battery in the power battery is too low.

[0004] In a first aspect, the embodiments of the present application provide a power battery power correction method, comprising:

[0005] obtaining an initial discharge power of a power battery;

[0006] obtaining a minimum single battery voltage and a minimum single battery temperature in the power battery, and determining a single battery target power based on the minimum single battery voltage and the minimum single battery temperature;

[0007] correcting the initial discharge power based on the single battery target power to obtain a final discharge power of the power battery.

[0008] In a possible implementation manner, the single battery target power is determined based on the minimum single battery voltage and the minimum single battery temperature, comprising:

[0009] determining the single battery target power corresponding to the minimum single battery voltage and the minimum single battery temperature based on a pre-stored first table;

[0010] The first table stores the corresponding relationship among the single battery voltage, the single battery temperature and the target power.

[0011] In a possible implementation manner, the initial discharge power is corrected based on the single battery target power to obtain the final discharge power of the power battery, comprising:

[0012] determining a candidate power based on the single battery target power and the initial discharge power;

[0013] filtering the candidate power to obtain a filtered candidate power;

[0014] determining the final discharge power of the power battery based on the filtered candidate power and the initial discharge power.

[0015] In a possible implementation, the initial discharge power includes a first initial discharge power and a second initial discharge power; the first initial discharge power and the second initial discharge power are initial discharge powers of different sizes that meet different use requirements.

[0016] determining the candidate power based on the single battery target power and the initial discharge power, including:

[0017] taking the minimum of the single battery target power, the first initial discharge power, and the second initial discharge power as the candidate power.

[0018] In a possible implementation, the initial discharge power includes a first initial discharge power and a second initial discharge power; the final discharge power includes a first final discharge power and a second final discharge power; the first final discharge power is a discharge power after the first initial discharge power is corrected; the second final discharge power is a discharge power after the second initial discharge power is corrected.

[0019] determining the final discharge power of the power battery based on the filtered candidate power and the initial discharge power, including:

[0020] taking the smaller value of the filtered candidate power and the first initial discharge power as the first final discharge power of the power battery.

[0021] taking the smaller value of the filtered candidate power and the second initial discharge power as the second final discharge power of the power battery.

[0022] In a possible implementation, filtering the candidate power to obtain a filtered candidate power includes:

[0023] determining a target filtering gradient based on the minimum single battery voltage and the minimum single battery temperature;

[0024] gradient filtering the candidate power according to the filtering gradient to obtain the filtered candidate power.

[0025] In a possible implementation, the target filtering gradient includes a target rising gradient or a target falling gradient.

[0026] determining a target filtering gradient based on the minimum single battery voltage and the minimum single battery temperature, including:

[0027] According to a discharge requirement of the current power battery, a target rising gradient or a target falling gradient is determined based on a minimum single battery voltage and a minimum single battery temperature.

[0028] In a possible implementation, the target rising gradient is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0029] The minimum single battery voltage and the minimum single battery temperature correspond to the target rising gradient based on a pre-stored second table.

[0030] The second table stores a corresponding relationship among the single battery voltage, the single battery temperature and the rising gradient.

[0031] The target falling gradient is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0032] The minimum single battery voltage and the minimum single battery temperature correspond to the target falling gradient based on a pre-stored third table.

[0033] The third table stores a corresponding relationship among the single battery voltage, the single battery temperature and the falling gradient.

[0034] In a second aspect, an embodiment of the present application provides a power battery power correction device, including:

[0035] An acquisition module is configured to acquire an initial discharge power of a power battery.

[0036] A target power determination module is configured to acquire a minimum single battery voltage and a minimum single battery temperature in the power battery, and determine a single battery target power based on the minimum single battery voltage and the minimum single battery temperature.

[0037] A correction module is configured to correct the initial discharge power based on the single battery target power to obtain a final discharge power of the power battery.

[0038] In a third aspect, an embodiment of the present application provides a control device, including a processor and a memory, the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to execute the power battery power correction method as described in the first aspect or any possible implementation of the first aspect.

[0039] In a fourth aspect, an embodiment of the present application provides a vehicle including the control device as described in the third aspect.

[0040] In a fifth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps of the power battery power correction method according to the first aspect or any possible implementation manner of the first aspect.

[0041] The embodiment of the present application provides a power battery power correction method, a vehicle and a storage medium. The method corrects an initial discharge power by using a minimum single battery voltage and a minimum single battery temperature in a power battery to determine a single battery target power, and obtains a final discharge power of the power battery. The minimum single battery voltage and the minimum single battery temperature are used to introduce voltage closed-loop control correction, so as to correct the initial discharge power of the power battery, and avoid the risk of excessive power output and battery over-discharge when the single battery voltage value of the power battery is too low. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0043] Figure 1 is an implementation flowchart of the power battery power correction method provided by an embodiment of the present application;

[0044] Figure 2 is a schematic diagram of the architecture of a hybrid vehicle provided by the present application;

[0045] Figure 3 is a structural schematic diagram of a power battery power correction device provided by an embodiment of the present application;

[0046] Figure 4 is a schematic diagram of a control device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0047] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without these specific details. In other instances, well-known systems, devices, circuits and methods have not been described in detail so as not to obscure the description of the present application.

[0048] In order to make the purpose, technical scheme and advantages of the present application clearer, specific embodiments will be described in combination with the drawings.

[0049] Referring to Figure 1 It shows an implementation flowchart of a power battery power correction method provided by the embodiment of the application. The execution subject of the power battery power correction method can be a control device, which can be a controller of the power battery, and specifically can be a BMS (Battery Management System) of the power battery.

[0050] The battery power correction method provided by the application can be applied to any vehicle that has the problem of excessive power output and battery over-discharge risk when the voltage value of the single battery of the power battery is too low, and is especially suitable for hybrid vehicles.

[0051] The power battery power correction method is described in detail as follows:

[0052] In S101, the initial discharge power of the power battery is obtained.

[0053] The control device of the power battery has a discharge map inside, which can be used to determine the initial discharge power of the power battery. Exemplarily, the discharge map can be a correspondence relationship among the temperature of the power battery, the SOC of the power battery and the discharge power. Based on the current temperature and the current SOC of the power battery, the map can be queried to obtain the initial discharge power of the power battery. In other embodiments, the discharge map can be related to other parameters of the power battery in addition to the temperature and the SOC, such as the SOF (State of Function) of the power battery, etc.

[0054] In S102, the minimum single battery voltage and the minimum single battery temperature in the power battery are obtained, and the single battery target power is determined based on the minimum single battery voltage and the minimum single battery temperature.

[0055] The power battery contains multiple single batteries, which can also be referred to as single battery cells. The multiple single batteries in the power battery can be in a series relationship, or some single batteries can be in series, and then the single batteries in series can be in parallel, etc.

[0056] The minimum single battery voltage is the minimum voltage among the current voltages of all single batteries contained in the power battery. The minimum single battery temperature is the minimum temperature among the current temperatures of all single batteries contained in the power battery.

[0057] The monomer battery target power is a voltage closed loop strategy target power, which can be understood as a discharge power determined based on the minimum monomer battery voltage and the minimum monomer battery temperature to avoid over-discharge risk of each monomer battery. Exemplarily, the monomer battery target power can be a maximum discharge power determined based on the minimum monomer battery voltage and the minimum monomer battery temperature to avoid over-discharge risk of each monomer battery.

[0058] The embodiment of the present application does not make specific limitation on the implementation means of determining the monomer battery target power based on the minimum monomer battery voltage and the minimum monomer battery temperature.

[0059] In S103, the initial discharge power is corrected based on the monomer battery target power to obtain the final discharge power of the power battery.

[0060] The embodiment can correct the initial discharge power according to the monomer battery target power to obtain the final discharge power of the power battery, so that the power battery can discharge based on the final discharge power. The final discharge power is the corrected discharge power.

[0061] The embodiment does not make specific limitation on the implementation means of correcting the initial discharge power based on the monomer battery target power to obtain the final discharge power of the power battery.

[0062] In some embodiments, in S102, the monomer battery target power is determined based on the minimum monomer battery voltage and the minimum monomer battery temperature, including:

[0063] The monomer battery target power corresponding to the minimum monomer battery voltage and the minimum monomer battery temperature is determined based on the pre-stored first table.

[0064] The first table stores the corresponding relationship among the monomer battery voltage, the monomer battery temperature and the target power.

[0065] The first table can be obtained by pre-calibration and stored in the control device. The corresponding target power can be queried from the first table by the minimum monomer battery voltage and the minimum monomer battery temperature, and the target power is the monomer battery target power.

[0066] Exemplarily, the first table can be as shown in Table 1, wherein X is the monomer battery voltage, the unit is V; Y is the monomer battery temperature, the unit is ℃; Z1 is the target power, the unit is W.

[0067] Table 1 first table

[0068]

[0069] In some embodiments, S103 can include:

[0070] determine a candidate power based on the single battery target power and the initial discharge power;

[0071] filter the candidate power to obtain a filtered candidate power;

[0072] determine the final discharge power of the power battery based on the filtered candidate power and the initial discharge power.

[0073] According to the single battery target power and the initial discharge power, the candidate power can be determined, for example, the smallest power can be selected as the candidate power. Then the candidate power is filtered to obtain a filtered candidate power; finally, the final discharge power of the power battery is determined according to the filtered candidate power and the initial discharge power.

[0074] In some embodiments, the initial discharge power includes a first initial discharge power and a second initial discharge power; the first initial discharge power and the second initial discharge power are different sizes of initial discharge power to meet different use requirements;

[0075] The above determining a candidate power based on the single battery target power and the initial discharge power includes:

[0076] The smallest one of the single battery target power, the first initial discharge power and the second initial discharge power is taken as the candidate power.

[0077] Generally, the first initial discharge power is a larger discharge power to meet the use of a shorter duration of larger discharge power, such as vehicle starting, etc.; the second initial discharge power is a smaller discharge power to meet the use of a longer duration of smaller discharge power, such as discharge power use after vehicle starting, etc.

[0078] The first initial discharge power can be referred to as an initial 2s discharge power, corresponding to a first discharge map, and the first discharge map can be a correspondence between the temperature of the power battery, the SOC of the power battery and the first discharge power. The first initial discharge power can be obtained according to the first discharge map.

[0079] The second initial discharge power can be referred to as an initial 10s discharge power, corresponding to a second discharge map, and the second discharge map can be a correspondence between the temperature of the power battery, the SOC of the power battery and the second discharge power. The second initial discharge power can be obtained according to the second discharge map.

[0080] In this embodiment, the smallest one of the single battery target power, the first initial discharge power and the second initial discharge power is taken as the candidate power.

[0081] In some embodiments, the initial discharge power includes a first initial discharge power and a second initial discharge power; the final discharge power includes a first final discharge power and a second final discharge power; the first final discharge power is the discharge power after the first initial discharge power is corrected; and the second final discharge power is the discharge power after the second initial discharge power is corrected.

[0082] The final discharge power of the power battery is determined based on the filtered candidate power and the initial discharge power, including:

[0083] The smaller one of the filtered candidate power and the first initial discharge power is taken as the first final discharge power of the power battery.

[0084] The smaller one of the filtered candidate power and the second initial discharge power is taken as the second final discharge power of the power battery.

[0085] In the embodiment, the first initial discharge power corresponds to the first final discharge power, and the second initial discharge power corresponds to the second final discharge power. The first final discharge power can be a final 2s discharge power, and the second final discharge power can be a final 10s discharge power.

[0086] The smaller one of the filtered candidate power and the first initial discharge power is taken as the first final discharge power of the power battery, and the smaller one of the filtered candidate power and the second initial discharge power is taken as the second final discharge power of the power battery, so as to avoid over-discharge of the single battery.

[0087] The embodiment provides two final discharge powers of different sizes, and the control device can use the first final discharge power or the second final discharge power according to actual needs, or switch the power between the first final discharge power and the second final discharge power according to actual needs. For example, the first final discharge power is greater than the second final discharge power. When a larger discharge power is needed, the first final discharge power can be selected for discharging, and when a smaller discharge power is needed, the second final discharge power can be selected for discharging. When switching the power between the first final discharge power and the second final discharge power, the power is usually switched slowly at a certain rate instead of being switched directly from one final discharge power to another final discharge power.

[0088] In another embodiment, the initial discharge power is a first initial discharge power.

[0089] The candidate power is determined based on the single battery target power and the initial discharge power, including:

[0090] The smaller one of the single battery target power and the first initial discharge power is taken as the candidate power.

[0091] Correspondingly, the final discharge power is a first final discharge power;

[0092] The final discharge power of the power battery is determined based on the filtered candidate power and the initial discharge power, including:

[0093] The smaller value between the filtered candidate power and the first initial discharge power is taken as the first final discharge power of the power battery.

[0094] In another embodiment, the initial discharge power is a second initial discharge power;

[0095] The candidate power is determined based on the single battery target power and the initial discharge power, including:

[0096] The smaller value between the single battery target power and the second initial discharge power is taken as the candidate power.

[0097] Correspondingly, the final discharge power is a second final discharge power;

[0098] The final discharge power of the power battery is determined based on the filtered candidate power and the initial discharge power, including:

[0099] The smaller value between the filtered candidate power and the second initial discharge power is taken as the second final discharge power of the power battery.

[0100] In some embodiments, the filtering of the candidate power to obtain the filtered candidate power can include:

[0101] The target filter gradient is determined based on the minimum single battery voltage and the minimum single battery temperature;

[0102] The candidate power is gradient filtered according to the filter gradient to obtain the filtered candidate power.

[0103] In this embodiment, the candidate power is filtered and processed by gradient filtering to obtain the filtered candidate power. The target filter gradient is the filter gradient for gradient filtering of the candidate power, which can also be understood as the power change rate, and can be obtained based on the minimum single battery voltage and the minimum single battery temperature. The step length of gradient filtering can be 100 ms.

[0104] In some embodiments, the target filter gradient includes a target rising gradient or a target falling gradient;

[0105] The target filter gradient is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0106] According to the current discharge requirement of the power battery, a target rising gradient or a target falling gradient is determined based on the minimum single battery voltage and the minimum single battery temperature.

[0107] The gradient filtering can be transforming a smaller power to a larger power, corresponding to the target rising gradient, or transforming a larger power to a smaller power, corresponding to the target falling gradient.

[0108] The embodiment can determine whether the discharge power needs to be increased or decreased according to the current discharge requirement of the power battery. If the discharge power needs to be increased, a target rising gradient is determined based on the minimum single battery voltage and the minimum single battery temperature. If the discharge power needs to be decreased, a target falling gradient is determined based on the minimum single battery voltage and the minimum single battery temperature.

[0109] The current discharge power needs to be increased or decreased can be determined according to the current power of the power battery. For example, if the current power of the power battery is greater than a preset power threshold, it is determined that the discharge power needs to be increased. If the current power of the power battery is less than or equal to the preset power threshold, it is determined that the discharge power needs to be decreased.

[0110] In a possible implementation, whether the discharge power needs to be increased or decreased can be determined according to the current power of the power battery and the actual required power. For example, if the current power of the power battery is greater than a preset power threshold, and the actual required power is greater than a preset required power, it is determined that the discharge power needs to be increased. If the current power of the power battery is less than or equal to the preset power threshold, and / or the actual required power is less than or equal to the preset required power, it is determined that the discharge power needs to be decreased.

[0111] In a possible implementation, whether the discharge power needs to be increased or decreased can be determined according to the current power of the power battery and the current actual discharge power. For example, if the current power of the power battery is greater than a preset power threshold, and the current actual discharge power is less than or equal to a preset discharge power threshold, it is determined that the discharge power needs to be increased. If the current power of the power battery is less than or equal to the preset power threshold, and / or the current actual discharge power is greater than the preset discharge power threshold, it is determined that the discharge power needs to be decreased.

[0112] The preset power threshold, the preset required power, and the preset discharge power threshold can be set according to actual requirements, which are not limited here.

[0113] In some embodiments, the target rising gradient is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0114] determine, based on the pre-stored second table, a target rising gradient corresponding to the minimum single battery voltage and the minimum single battery temperature;

[0115] wherein the second table stores a corresponding relationship among the single battery voltage, the single battery temperature and the rising gradient;

[0116] determine, based on the minimum single battery voltage and the minimum single battery temperature, a target falling gradient, comprising:

[0117] determine, based on the pre-stored third table, a target falling gradient corresponding to the minimum single battery voltage and the minimum single battery temperature;

[0118] wherein the third table stores a corresponding relationship among the single battery voltage, the single battery temperature and the falling gradient.

[0119] The second table and the third table can be obtained through pre-calibration and stored in the control device. The corresponding rising gradient can be queried from the second table through the minimum single battery voltage and the minimum single battery temperature, and the rising gradient is the target rising gradient. The corresponding falling gradient can be queried from the third table through the minimum single battery voltage and the minimum single battery temperature, and the falling gradient is the target falling gradient.

[0120] Exemplarily, the second table can be as shown in Table 2, wherein X is the single battery voltage, the unit is V; Y is the single battery temperature, the unit is ℃; Z2 is the rising gradient, the unit is W. The third table can be as shown in Table 3, wherein X is the single battery voltage, the unit is V; Y is the single battery temperature, the unit is ℃; Z3 is the falling gradient, the unit is W.

[0121] Table 2 second table

[0122]

[0123] Table 3 third table

[0124]

[0125] The power battery power correction method provided in the application can be applied to a 2HAMT+P4 architecture hybrid vehicle, but not only to the architecture hybrid vehicle, and can be used for any vehicle that may have the foregoing technical problems.

[0126] wherein the structure of the 2HAMT+P4 architecture hybrid vehicle is as shown in Figure 2 , comprising an engine 21, a clutch 22, a gearbox 23, a P2 motor 24 and a P4 motor 25, the gearbox 23 comprising a synchronizer 231, and the connection relationship is described in Figure 2 , and will not be described again. The gearbox can be a two-gear gearbox, and the 2HAMT is a two-gear hybrid intelligent four-wheel drive automatic gearbox.

[0127] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0128] The following is the device embodiment of the present application. For details not described in detail, please refer to the corresponding method embodiments described above.

[0129] Figure 3 The structure diagram of the power battery power correction device provided by the embodiment of the present application is shown. In order to facilitate the description, only the part related to the embodiment of the present application is shown, and the details are as follows:

[0130] As shown in Figure 3 The power battery power correction device 30 includes an acquisition module 31, a target power determination module 32 and a correction module 33.

[0131] The acquisition module 31 is configured to acquire the initial discharge power of the power battery.

[0132] The target power determination module 32 is configured to acquire the minimum single battery voltage and the minimum single battery temperature in the power battery, and determine the single battery target power based on the minimum single battery voltage and the minimum single battery temperature.

[0133] The correction module 33 is configured to correct the initial discharge power based on the single battery target power to obtain the final discharge power of the power battery.

[0134] In a possible implementation, in the target power determination module 32, the single battery target power is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0135] The single battery target power corresponding to the minimum single battery voltage and the minimum single battery temperature is determined based on a pre-stored first table.

[0136] The first table stores the corresponding relationship among the single battery voltage, the single battery temperature and the target power.

[0137] In a possible implementation, the correction module 33 is specifically configured to:

[0138] Determine the candidate power based on the single battery target power and the initial discharge power.

[0139] Filter the candidate power to obtain the filtered candidate power.

[0140] Determine the final discharge power of the power battery based on the filtered candidate power and the initial discharge power.

[0141] In a possible implementation, in the correction module 33, the initial discharge power includes a first initial discharge power and a second initial discharge power; the first initial discharge power and the second initial discharge power are initial discharge powers of different sizes meeting different use requirements;

[0142] Based on the single battery target power and the initial discharge power, the candidate power is determined, including:

[0143] The minimum of the single battery target power, the first initial discharge power and the second initial discharge power is taken as the candidate power.

[0144] In a possible implementation, in the correction module 33, the initial discharge power includes a first initial discharge power and a second initial discharge power; the final discharge power includes a first final discharge power and a second final discharge power; the first final discharge power is the discharge power after the first initial discharge power is corrected; the second final discharge power is the discharge power after the second initial discharge power is corrected;

[0145] Based on the filtered candidate power and the initial discharge power, the final discharge power of the power battery is determined, including:

[0146] The smaller value of the filtered candidate power and the first initial discharge power is taken as the first final discharge power of the power battery;

[0147] The smaller value of the filtered candidate power and the second initial discharge power is taken as the second final discharge power of the power battery.

[0148] In a possible implementation, in the correction module 33, the candidate power is filtered to obtain the filtered candidate power, including:

[0149] Based on the minimum single battery voltage and the minimum single battery temperature, the target filtering gradient is determined;

[0150] According to the filtering gradient, the gradient filtering is performed on the candidate power to obtain the filtered candidate power.

[0151] In a possible implementation, in the correction module 33, the target filtering gradient includes a target rising gradient or a target falling gradient;

[0152] Based on the minimum single battery voltage and the minimum single battery temperature, the target filtering gradient is determined, including:

[0153] According to the current discharge requirement of the power battery, based on the minimum single battery voltage and the minimum single battery temperature, the target rising gradient or the target falling gradient is determined.

[0154] In a possible implementation, in the correction module 33, the target rising gradient is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0155] The target rising gradient corresponding to the minimum single battery voltage and the minimum single battery temperature is determined based on a pre-stored second table;

[0156] The second table stores a corresponding relationship among the single battery voltage, the single battery temperature and the rising gradient.

[0157] The target falling gradient is determined based on the minimum single battery voltage and the minimum single battery temperature, including:

[0158] The target falling gradient corresponding to the minimum single battery voltage and the minimum single battery temperature is determined based on a pre-stored third table;

[0159] The third table stores a corresponding relationship among the single battery voltage, the single battery temperature and the falling gradient.

[0160] The embodiments of the present application also provide a computer program product having program codes, which perform the steps in any one of the above power battery power correction method embodiments when running in a corresponding processor, controller, computing device or control device, for example Figure 1 S101 to S103. Those skilled in the art should understand that the method and the device proposed by the embodiments of the present application can be realized in various forms of hardware, software, firmware, special-purpose processor or combination thereof. The special-purpose processor can include application-specific integrated circuit (ASIC), reduced instruction set computer (RISC) and / or field programmable gate array (FPGA). The proposed method and device are preferably realized as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. It is typically a machine based on a computer platform with hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein can be part of the application program, or part thereof can be executed by the operating system.

[0161] Figure 4 is a schematic diagram of the control device provided by the embodiments of the present application. As Figure 4 shown, the control device 4 of the embodiments includes a processor 40 and a memory 41. The memory 41 is used to store a computer program 42, and the processor 40 is used to call and run the computer program 42 stored in the memory 41 to perform the steps in each of the above power battery power correction method embodiments, for example Figure 1S101 to S103. Alternatively, the processor 40 is configured to invoke and run the computer program 42 stored in the memory 41, so as to realize the functions of the modules / units in the above-mentioned various apparatus embodiments, for example Figure 3 the functions of the modules / units 31 to 33.

[0162] For example, the computer program 42 can be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete / implement the schemes provided in the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program 42 in the control device 4. For example, the computer program 42 can be divided into Figure 3 the modules / units 31 to 33.

[0163] The control device 4 can include, but is not limited to, the processor 40 and the memory 41. Those skilled in the art can understand that the control device 4 can further include other components, for example, the control device 4 can further include an input / output device, a network access device, a bus, etc. Figure 4 The control device 4 shown in the figure is merely an example and does not constitute a limitation on the control device 4, and can include more or fewer components than those shown in the figure, or combine certain components, or different components, for example, the control device can further include an input / output device, a network access device, a bus, etc.

[0164] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0165] The memory 41 can be an internal storage unit of the control device 4, for example, a hard disk or a memory of the control device 4. The memory 41 can also be an external storage device of the control device 4, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the control device 4. Further, the memory 41 can also include both the internal storage unit and the external storage device of the control device 4. The memory 41 is used to store the computer program and other programs and data required by the control device. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0166] Corresponding to the above control device, the embodiment of the present application also provides a vehicle comprising the above control device.

[0167] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the unit and module in the above system can refer to the corresponding process in the foregoing method embodiment, which will not be described here.

[0168] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0169] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0170] In the embodiments of the present application, it should be understood that the disclosed apparatus / control device and method can be implemented in other manners. For example, the described apparatus / control device embodiments are merely schematic. For example, the division of the modules or units is merely logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0171] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0172] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0173] The integrated module / unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-described embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of the above various power battery power correction methods embodiments can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the computer readable medium can include appropriate contents according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0174] Furthermore, the features of the embodiments shown in the accompanying drawings or the various embodiments mentioned in this specification should not be construed as independent embodiments. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the accompanying drawings.

[0175] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for power correction of a power battery, characterized in that, The method comprises: acquiring an initial discharge power of the power battery; acquiring a minimum single battery voltage and a minimum single battery temperature in the power battery, and determining a single battery target power based on the minimum single battery voltage and the minimum single battery temperature; correcting the initial discharge power based on the single battery target power to obtain a final discharge power of the power battery; the correcting the initial discharge power based on the single battery target power to obtain a final discharge power of the power battery comprises: determining a candidate power based on the single battery target power and the initial discharge power; filtering the candidate power to obtain a filtered candidate power; determining a final discharge power of the power battery based on the filtered candidate power and the initial discharge power; the initial discharge power comprises a first initial discharge power and / or a second initial discharge power; when the initial discharge power comprises the first initial discharge power and the second initial discharge power, the first initial discharge power and the second initial discharge power are initial discharge powers of different sizes meeting different use requirements.

2. The method of claim 1, wherein, the determining a single battery target power based on the minimum single battery voltage and the minimum single battery temperature comprises: determining a single battery target power corresponding to the minimum single battery voltage and the minimum single battery temperature based on a pre-stored first table; wherein the first table stores a correspondence among a single battery voltage, a single battery temperature and a target power.

3. The method of claim 1, wherein, the initial discharge power comprises a first initial discharge power and a second initial discharge power; the determining a candidate power based on the single battery target power and the initial discharge power comprises: taking the minimum one of the single battery target power, the first initial discharge power and the second initial discharge power as the candidate power.

4. The method of claim 1, wherein, the initial discharge power comprises a first initial discharge power and a second initial discharge power; the final discharge power comprises a first final discharge power and a second final discharge power; the first final discharge power is a discharge power after the first initial discharge power is corrected; the second final discharge power is a discharge power after the second initial discharge power is corrected; the determining a final discharge power of the power battery based on the filtered candidate power and the initial discharge power comprises: taking a smaller value between the filtered candidate power and the first initial discharge power as the first final discharge power of the power battery; taking a smaller value between the filtered candidate power and the second initial discharge power as the second final discharge power of the power battery.

5. The method of claim 1, wherein, the filtering the candidate power to obtain a filtered candidate power comprises: determining a target filtering gradient based on the minimum single battery voltage and the minimum single battery temperature; gradient filtering the candidate power according to the filtering gradient to obtain a filtered candidate power.

6. The method of claim 5, wherein, the target filtering gradient comprises a target rising gradient or a target falling gradient; the determining a target filtering gradient based on the minimum single battery voltage and the minimum single battery temperature comprises: According to a current power battery discharge requirement, a target rising gradient or a target falling gradient is determined based on the minimum single battery voltage and the minimum single battery temperature.

7. The method of claim 6, wherein, Determining the target rising gradient based on the minimum single battery voltage and the minimum single battery temperature comprises: Determining the target rising gradient corresponding to the minimum single battery voltage and the minimum single battery temperature based on a pre-stored second table; The second table stores a corresponding relationship among a single battery voltage, a single battery temperature and a rising gradient. Determining the target falling gradient based on the minimum single battery voltage and the minimum single battery temperature comprises: Determining the target falling gradient corresponding to the minimum single battery voltage and the minimum single battery temperature based on a pre-stored third table; The third table stores a corresponding relationship among a single battery voltage, a single battery temperature and a falling gradient.

8. A vehicle characterized by comprising: The control device comprises a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the power battery power correction method according to any one of claims 1 to 7.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by the processor to implement the steps of the power battery power correction method according to any one of claims 1 to 7.

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