Vehicle power battery control method and device, vehicle, and storage medium

Abstract

The application relates to a power battery control method and device of a vehicle, the vehicle and a storage medium, wherein the method comprises the following steps: identifying a current whole-vehicle working mode of the vehicle; determining available maximum discharge power of a power battery of the vehicle according to the whole-vehicle working mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power; and controlling power output of the power battery based on the optimal power output strategy and actual load power demand of the vehicle. Therefore, the technical problem that, in the prior art, the power composition of a hybrid vehicle is different in different working modes, so that the discharge capacity of the battery cannot be fully released, and the service life of the battery is reduced, is solved.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a power battery control method, device, vehicle, and storage medium for a vehicle. Background Technology

[0002] Hybrid vehicles contain two powertrains and have two operating modes: hybrid and pure electric. Both the engine and the battery can serve as power sources.

[0003] In related technologies, the vehicle controller can logically control the intervention of different power sources as the driving force of the vehicle based on a comprehensive consideration of the vehicle's operating conditions and the power battery's discharge capacity.

[0004] However, current power battery discharge control technologies do not take into account the different power compositions and varying power demands of hybrid vehicles under different operating modes. This makes it difficult to fully unleash the battery's discharge capacity and results in insufficient safety discharge protection measures, thereby reducing battery lifespan. Improvements are needed. Summary of the Invention

[0005] This application provides a power battery control method, device, vehicle, and storage medium for a vehicle, to solve the technical problem in the related art that the different power composition of hybrid vehicles under different operating modes is not taken into account, which makes it difficult to fully release the battery's discharge capacity and thus reduces the battery's service life.

[0006] The first aspect of this application provides a power battery control method for a vehicle, comprising the following steps: identifying the current vehicle operating mode; determining the maximum available discharge power of the vehicle's power battery according to the vehicle operating mode, and generating an optimal power output strategy for the power battery based on the maximum available discharge power; and controlling the output power of the power battery based on the optimal power output strategy and the actual load power requirements of the vehicle.

[0007] Optionally, in one embodiment of this application, identifying the current vehicle operating mode includes: acquiring the power source status information of the vehicle; and determining the current vehicle operating mode based on the power source status information, wherein the current vehicle operating mode is a hybrid operating mode, a cold start operating mode, or a pure electric operating mode.

[0008] Optionally, in an embodiment of the present application, the determining the available maximum discharge power of the power battery of the vehicle according to the working mode of the vehicle and generating the optimal power output strategy of the power battery based on the available maximum discharge power comprises: if the working mode of the vehicle is the hybrid working mode, querying a preset power table to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is greater than the second available maximum discharge power, and a strategy of controlling the power battery to output smoothly based on the first available maximum discharge power and the second available maximum discharge power.

[0009] Optionally, in an embodiment of the present application, the strategy of controlling the power battery to output smoothly based on the first available maximum discharge power and the second available maximum discharge power comprises: calculating a first product value of a current and a voltage output by the power battery; determining whether the first product value meets a preset first determination condition; if the first product value meets the preset first determination condition, controlling the power battery to decrease the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power at a first preset speed, otherwise, controlling the power battery to decrease the maximum discharge power to the second available maximum discharge power at a second preset speed, wherein the first preset speed is greater than the second preset speed.

[0010] Optionally, in an embodiment of the present application, the determining the available maximum discharge power of the power battery of the vehicle according to the working mode of the vehicle and generating the optimal power output strategy of the power battery based on the available maximum discharge power comprises: if the working mode of the vehicle is the cold start working mode, the optimal power output strategy is a strategy of keeping the available maximum discharge power of the cold start working mode to output.

[0011] Optionally, in an embodiment of the present application, the determining the available maximum discharge power of the power battery of the vehicle according to the working mode of the vehicle and generating the optimal power output strategy of the power battery based on the available maximum discharge power comprises: if the working mode of the vehicle is the pure electric working mode, querying a preset power table to obtain a third available maximum discharge power and a fourth available maximum discharge power of the pure electric working mode, wherein the third available maximum discharge power is greater than the fourth available maximum discharge power, and a strategy of controlling the power battery to output smoothly based on the third available maximum discharge power and the fourth available maximum discharge power.

[0012] Optionally, in an embodiment of the present application, the strategy of controlling the smooth output of the power battery based on the third available maximum discharge power and the fourth available maximum discharge power comprises: calculating a second product value of the current and the voltage of the output of the power battery; judging whether the second product value satisfies a preset second judgment condition; if the second product value satisfies the preset second judgment condition, controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power at a third preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power at a fourth preset speed, wherein the third preset speed is greater than the fourth preset speed.

[0013] The second aspect embodiment of the present application provides a power battery control device of a vehicle, comprising: an identification module configured to identify a current vehicle working mode of the vehicle; a generation module configured to determine an available maximum discharge power of a power battery of the vehicle according to the vehicle working mode, and generate an optimal power output strategy of the power battery based on the available maximum discharge power; and a control module configured to control the output power of the power battery based on the optimal power output strategy and an actual load power demand of the vehicle.

[0014] Optionally, in an embodiment of the present application, the identification module comprises: a first acquisition unit configured to acquire power source state information of the vehicle; and a determination unit configured to determine the current vehicle working mode of the vehicle according to the power source state information, wherein the current vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.

[0015] Optionally, in an embodiment of the present application, the generation module comprises: a second acquisition unit configured to, when the vehicle working mode is the hybrid working mode, query a preset power table to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is greater than the second available maximum discharge power, and a strategy of controlling the smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power.

[0016] Optionally, in an embodiment of the present application, the second obtaining unit comprises: a first calculating sub-unit, configured to calculate a first product value of a current and a voltage output by the power battery; a first judging sub-unit, configured to judge whether the first product value satisfies a preset first judging condition; and a first control sub-unit, configured to control the power battery to decrease the available maximum discharging power from the first available maximum discharging power to the second available maximum discharging power at a first preset speed when the first product value satisfies the preset first judging condition, or control the power battery to decrease the maximum discharging power to the second available maximum discharging power at a second preset speed when the first product value does not satisfy the preset first judging condition, wherein the first preset speed is greater than the second preset speed.

[0017] Optionally, in an embodiment of the present application, the generating module is further configured to, when the working mode of the vehicle is the cold start working mode, generate the optimal power output strategy as a strategy of keeping the available maximum discharging power of the cold start working mode for output.

[0018] Optionally, in an embodiment of the present application, the generating module comprises: a second obtaining unit, configured to, when the working mode of the vehicle is the pure electric working mode, query a preset power table to obtain a third available maximum discharging power and a fourth available maximum discharging power of the pure electric working mode, wherein the third available maximum discharging power is greater than the fourth available maximum discharging power, and a strategy of controlling the power battery to output smoothly based on the third available maximum discharging power and the fourth available maximum discharging power.

[0019] Optionally, in an embodiment of the present application, the second obtaining unit comprises: a second calculating sub-unit, configured to calculate a second product value of a current and a voltage output by the power battery; a second judging sub-unit, configured to judge whether the second product value satisfies a preset second judging condition; and a second control sub-unit, configured to control the power battery to decrease the available maximum discharging power from the third available maximum discharging power to the fourth available maximum discharging power at a third preset speed when the second product value satisfies the preset second judging condition, or control the power battery to decrease the maximum discharging power to the fourth available maximum discharging power at a fourth preset speed when the second product value does not satisfy the preset second judging condition, wherein the third preset speed is greater than the fourth preset speed.

[0020] The third aspect embodiment of the present application provides a vehicle, comprising the power battery control device of the vehicle as described in the above embodiments.

[0021] The fourth aspect of the present application provides a computer readable storage medium, which stores computer program codes, when the computer program codes are run on a computer, the computer is caused to execute the vehicle power battery control method in the first aspect or any possible implementation manner of the first aspect.

[0022] The embodiments of the present application can determine the available maximum discharge power of the power battery of the vehicle according to different whole vehicle working modes of the vehicle, thereby generating the optimal power output strategy of the power battery based on the available maximum discharge power, and controlling the power output of the power battery based on the optimal power output strategy and the actual load power demand of the vehicle, which greatly improves the available maximum discharge power of the battery under different working conditions, guarantees the whole vehicle power performance, and prolongs the service life of the power battery. Thus, the technical problem that the discharge capacity of the battery cannot be fully released due to different power compositions of the hybrid vehicle under different working modes in the related art, thereby reducing the service life of the battery, is solved.

[0023] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein:

[0025] Figure 1 A flowchart of a vehicle power battery control method according to an embodiment of the present application is provided;

[0026] Figure 2 A principle schematic diagram of a vehicle power battery control method according to an embodiment of the present application is provided;

[0027] Figure 3 A structural schematic diagram of a vehicle power battery control device according to an embodiment of the present application is provided;

[0028] Figure 4 A structural schematic diagram of a vehicle according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] A vehicle power battery control method, device, vehicle and storage medium are described below with reference to the accompanying drawings. In the related art mentioned in the background, the power composition of a hybrid vehicle is different in different working modes, which makes it difficult to fully release the discharge capacity of the battery, thereby reducing the service life of the battery. To solve the technical problem that the related art does not consider that the power composition of a hybrid vehicle is different in different working modes, which makes it difficult to fully release the discharge capacity of the battery, thereby reducing the service life of the battery, the present application provides a vehicle power battery control method. In this method, the available maximum discharge power of the vehicle power battery can be determined according to the different working modes of the vehicle. Therefore, the optimal power output strategy of the power battery can be generated based on the available maximum discharge power, and the power output of the power battery can be controlled based on the optimal power output strategy and the actual load power demand of the vehicle. This greatly improves the available maximum discharge power of the battery under different working conditions, while ensuring the power performance of the vehicle and prolonging the service life of the power battery. Thus, the technical problem that the related art does not consider that the power composition of a hybrid vehicle is different in different working modes, which makes it difficult to fully release the discharge capacity of the battery, thereby reducing the service life of the battery, is solved.

[0031] Specifically, Figure 1 A flowchart of a vehicle power battery control method provided by an embodiment of the present application is shown.

[0032] As Figure 1 shown, the vehicle power battery control method includes the following steps:

[0033] In step S101, the current vehicle working mode is identified.

[0034] In actual execution, the present application can obtain the working mode of the vehicle in real time through the power battery of the vehicle, so as to adjust the discharge power of the power battery according to different working modes, thereby improving the available maximum discharge power of the battery under different working conditions, ensuring the power performance of the vehicle, and prolonging the service life of the power battery.

[0035] Optionally, in an embodiment of the present application, identifying the current vehicle working mode of the vehicle includes: obtaining power source state information of the vehicle; determining the current vehicle working mode of the vehicle according to the power source state information, wherein the current vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.

[0036] Specifically, the present application can obtain the power source state information of the vehicle, including the number of power sources currently working in the vehicle, the type of power source, etc., wherein the power source refers to the engine and the power battery. The present application can determine the current vehicle working mode of the vehicle according to the power source state information and in combination with the current state of the vehicle, such as the low-temperature cold start state, the normal driving state, etc.

[0037] When both power sources discharge simultaneously, the current vehicle operating mode is a hybrid operating mode, meaning that there are two power sources providing power to the vehicle.

[0038] When the vehicle is cold-started at low temperatures, the current operating mode of the vehicle is cold-start operating mode;

[0039] When only the power battery is discharging, the current vehicle operating mode is pure electric mode, meaning there is a power source that provides power to the vehicle.

[0040] In step S102, the maximum available discharge power of the vehicle's power battery is determined according to the vehicle's operating mode, and the optimal power output strategy of the power battery is generated based on the maximum available discharge power.

[0041] Furthermore, embodiments of this application can determine the maximum available discharge power of the vehicle's power battery for hybrid operating mode, cold start operating mode, or pure electric operating mode, thereby obtaining the optimal power output strategy for the power battery.

[0042] Among them, the discharge power refers to the power battery's output power, which can be obtained by looking up a table based on the temperature, SOC (System on Chip) status, and a certain discharge time.

[0043] Optionally, in one embodiment of this application, determining the maximum available discharge power of the vehicle's power battery according to the vehicle's operating mode, and generating an optimal power output strategy for the power battery based on the maximum available discharge power, includes: if the vehicle's operating mode is a hybrid operating mode, querying a preset power table to obtain a first maximum available discharge power and a second maximum available discharge power for the hybrid operating mode, wherein the first maximum available discharge power is greater than the second maximum available discharge power, and a strategy for controlling the smooth output of the power battery based on the first maximum available discharge power and the second maximum available discharge power.

[0044] As one possible implementation, in this embodiment of the application, when the vehicle is in hybrid mode, the first available maximum discharge power, i.e., the 30-second discharge power P, can be obtained by querying a preset power table. 30S The second available maximum discharge power, i.e., the continuous discharge power P cont Among them, the 30-second discharge power P 30S Greater than the continuous discharge power P cont .

[0045] The embodiments of this application can be based on a 30S discharge power P 30S and continuous discharge power P cont Strategies for controlling the smooth output of power batteries.

[0046] Optionally, in one embodiment of this application, the strategy for controlling the smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power includes: calculating a first product value of the current and voltage output by the power battery; determining whether the first product value satisfies a preset first judgment condition; if the first product value satisfies the preset first judgment condition, controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power at a first preset speed; otherwise, controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power at a second preset speed, wherein the first preset speed is greater than the second preset speed.

[0047] Specifically, in the embodiments of this application, the 30-second discharge power P 30S and continuous discharge power P cont Smooth switching between them refers to the power battery first switching according to P... 30S The power output is reported to the vehicle, and the power battery calculates the first product value P of the current and voltage of the power output in real time. now When P now ≥δ1*P 30S And (ΔP) now When / Δt)>k1, the output power reported by the battery decreases linearly to the continuous discharge power P at a first preset speed, such as 10kW / s. cont When P now ≥δ1*P 30S And (ΔP) now When / Δt)≤k1, the output power reported by the battery decreases linearly to the continuous discharge power P at a second preset speed, such as 8kW / s. cont .

[0048] Among them, δ1 is 0.8-0.85; k1 is 5-10kW / s.

[0049] Optionally, in one embodiment of this application, the maximum available discharge power of the vehicle's power battery is determined according to the vehicle's operating mode, and an optimal power output strategy for the power battery is generated based on the maximum available discharge power, including: if the vehicle's operating mode is a cold start operating mode, then the optimal power output strategy is a strategy that maintains the maximum available discharge power of the cold start operating mode for output.

[0050] In some embodiments of this application, when the vehicle is in cold start mode, a preset power table can be consulted to maintain the maximum available discharge power output in cold start mode, such as the power battery maintaining a 2-second discharge power P. 2S It outputs power to meet the power requirements during startup.

[0051] Optionally, in one embodiment of this application, determining the maximum available discharge power of the vehicle's power battery according to the vehicle's operating mode, and generating an optimal power output strategy for the power battery based on the maximum available discharge power, includes: if the vehicle's operating mode is a pure electric operating mode, querying a preset power table to obtain a third and a fourth available maximum discharge power for the pure electric operating mode, wherein the third available maximum discharge power is greater than the fourth available maximum discharge power, and a strategy for controlling the smooth output of the power battery based on the third and fourth available maximum discharge power.

[0052] In other embodiments, when the vehicle is in pure electric mode, the present application embodiments can query a preset power table to obtain the third available maximum discharge power in pure electric mode, i.e., the 5-second discharge power P. 5S And the fourth available maximum discharge power, i.e., the 10S discharge power P 10S Among them, the 5S discharge power P 5S Discharge power P greater than 10s 10S .

[0053] The embodiments of this application can be based on a 5S discharge power P 5S and 10S discharge power P 10S Strategies for controlling the smooth output of power batteries.

[0054] Optionally, in one embodiment of this application, the strategy for controlling the smooth output of the power battery based on the third available maximum discharge power and the fourth available maximum discharge power includes: calculating a second product value of the current and voltage output by the power battery; determining whether the second product value satisfies a preset second judgment condition; if the second product value satisfies the preset second judgment condition, controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power at a third preset speed; otherwise, controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power at a fourth preset speed, wherein the third preset speed is greater than the fourth preset speed.

[0055] Specifically, in the embodiments of this application, the 5S discharge power P 5S and 10S discharge power P 10S Smooth switching between them refers to the power battery first discharging at a power output of P in 5 seconds. 5S The power output is reported to the vehicle, and the power battery calculates the second product P of the current and voltage of the power output in real time. now When P now ≥δ2*P 5S And (ΔP) now When / Δt)>k2, the output power reported by the battery decreases linearly to the discharge power P in 10 seconds at a third preset speed, such as 6kW / s. 10S When Pnow ≥ δ2*P 5S and (ΔP now / Δt)≤k2, the output power reported by the battery is linearly reduced to 10S discharge power P 10S .

[0056] wherein δ2 is 0.9-0.95; k2 is 10-15kW / s.

[0057] In step S103, the power battery output power is controlled based on the optimal power output strategy and the actual load power demand of the vehicle.

[0058] Further, the power battery output power can be controlled based on the optimal power output strategy and the actual load power demand of the vehicle, so that the maximum discharge power of the battery under different working modes is greatly improved, the power performance of the vehicle is ensured, and the service life of the power battery is maintained.

[0059] In combination with Figure 2 , the working principle of the power battery control method of the vehicle in the embodiments of the present application is described in detail.

[0060] As shown in Figure 2 , the embodiments of the present application can include the following steps:

[0061] Step S201: Obtain the working mode of the vehicle, and the power battery is switched to different discharge power in real time according to different working modes.

[0062] Step S202: Cold start mode. When the working mode of the vehicle is the cold start working mode, the power battery obtains 2S discharge power P 2S according to the temperature and SOC state lookup table, and reports the 2S discharge power P 2S to the vehicle to maintain the maximum discharge power of the cold start working mode, so as to meet the power demand at the start.

[0063] Step S203: Pure electric mode. When the working mode of the vehicle is the pure electric working mode, the power battery obtains 5S discharge power P 5S and 10S discharge power P 10S according to the temperature and SOC state lookup table. Wherein, the 5S discharge power P 5S is greater than the 10S discharge power P 10S .

[0064] Specifically, in the embodiments of the present application, the 5S discharge power P 5S is greater than the 10S discharge power P 10SSmooth switching between them refers to the power battery first discharging at a power output of P in 5 seconds. 5S The power output is reported to the vehicle, and the power battery calculates the product of the current and voltage, P, in real time. now When P now ≥δ2*P 5S And (ΔP) now When / Δt)>k2, the output power reported by the battery decreases linearly to the discharge power P in 10 seconds at a rate of 6kW / s. 10S When P now ≥δ2*P 5S And (ΔP) now When / Δt)≤k2, the output power reported by the battery decreases linearly to the discharge power P in 10 seconds at a rate of 3kW / s. 10S .

[0065] Among them, δ2 is 0.9-0.95; k2 is 10-15kW / s.

[0066] Step S204: Hybrid Mode. In this embodiment, when the vehicle is in hybrid mode, the power battery can obtain the 30-second discharge power P by looking up a table based on temperature and SOC status. 30S and continuous discharge power P cont Among them, the 30-second discharge power P 30S Greater than the continuous discharge power P cont .

[0067] Specifically, in the embodiments of this application, the 30-second discharge power P 30S and continuous discharge power P cont Smooth switching between them refers to the power battery first switching according to P... 30S The power output is reported to the vehicle, and the power battery calculates the product of the current and voltage, P, in real time. now When P now ≥δ1*P 30S And (ΔP) now When ( / Δt)>k1, the output power reported by the battery decreases linearly to the continuous discharge power P at a rate of 10kW / s. cont When P now ≥δ1*P 30S And (ΔP) now When / Δt)≤k1, the output power reported by the battery decreases linearly to the continuous discharge power P at a rate of 8kW / s. cont .

[0068] Among them, δ1 is 0.8-0.85; k1 is 5-10kW / s.

[0069] According to the vehicle power battery control method provided in the embodiments of the present application, the available maximum discharge power of the power battery of the vehicle can be determined according to different vehicle working modes, so that the optimal power output strategy of the power battery is generated based on the available maximum discharge power, and the power output of the power battery is controlled based on the optimal power output strategy and the actual load power demand of the vehicle, which greatly improves the available maximum discharge power of the battery under different working conditions, guarantees the vehicle power performance, and prolongs the service life of the power battery. Therefore, the technical problem in the related art that the discharge capacity of the battery cannot be fully released due to different power compositions of the hybrid vehicle under different working modes, thereby reducing the service life of the battery, is solved.

[0070] Next, the vehicle power battery control device provided in the embodiments of the present application is described with reference to the accompanying drawings.

[0071] Figure 3 FIG. 1 is a block schematic diagram of the vehicle power battery control device according to the embodiments of the present application.

[0072] As shown in FIG. 1, the vehicle power battery control device 10 includes an identification module 100, a generation module 200, and a control module 300. Figure 3

[0073] Specifically, the identification module 100 is configured to identify the current vehicle working mode of the vehicle.

[0074] The generation module 200 is configured to determine the available maximum discharge power of the power battery of the vehicle according to the vehicle working mode, and generate the optimal power output strategy of the power battery based on the available maximum discharge power.

[0075] The control module 300 is configured to control the power output of the power battery based on the optimal power output strategy and the actual load power demand of the vehicle.

[0076] Optionally, in an embodiment of the present application, the identification module 100 includes a first acquisition unit and a determination unit.

[0077] The first acquisition unit is configured to acquire the power source state information of the vehicle.

[0078] The determination unit is configured to determine the current vehicle working mode of the vehicle according to the power source state information, wherein the current vehicle working mode is a hybrid working mode, a cold start working mode, or a pure electric working mode.

[0079] Optionally, in an embodiment of the present application, the generation module 200 includes a second acquisition unit.

[0080] ​The second acquisition unit is configured to query a preset power table to obtain a first available maximum discharging power and a second available maximum discharging power of the hybrid working mode when the working mode of the whole vehicle is the hybrid working mode, the first available maximum discharging power is greater than the second available maximum discharging power, and a strategy for controlling the smooth output of the power battery is based on the first available maximum discharging power and the second available maximum discharging power.

[0081] Optionally, in an embodiment of the present application, the second acquisition unit comprises a first calculation sub-unit, a first judgment sub-unit and a first control sub-unit.

[0082] The first calculation sub-unit is configured to calculate a first product value of the current and the voltage output by the power battery.

[0083] The first judgment sub-unit is configured to judge whether the first product value meets a preset first judgment condition.

[0084] The first control sub-unit is configured to control the power battery to reduce the available maximum discharging power from the first available maximum discharging power to the second available maximum discharging power at a first preset speed when the first product value meets the preset first judgment condition, or control the power battery to reduce the maximum discharging power to the second available maximum discharging power at a second preset speed, wherein the first preset speed is greater than the second preset speed.

[0085] Optionally, in an embodiment of the present application, the generation module 200 is further configured to, when the working mode of the whole vehicle is the cold start working mode, the optimal power output strategy is a strategy of keeping the available maximum discharging power of the cold start working mode for output.

[0086] Optionally, in an embodiment of the present application, the generation module 200 comprises a second acquisition unit.

[0087] The second acquisition unit is configured to query a preset power table to obtain a third available maximum discharging power and a fourth available maximum discharging power of the pure electric working mode when the working mode of the whole vehicle is the pure electric working mode, the third available maximum discharging power is greater than the fourth available maximum discharging power, and a strategy for controlling the smooth output of the power battery is based on the third available maximum discharging power and the fourth available maximum discharging power.

[0088] Optionally, in an embodiment of the present application, the second acquisition unit comprises a second calculation sub-unit, a second judgment sub-unit and a second control sub-unit.

[0089] The second calculation sub-unit is configured to calculate a second product value of the current and the voltage output by the power battery.

[0090] The second judgment sub-unit is configured to judge whether the second product value meets a preset second judgment condition.

[0091] The second control subunit is configured to control the power battery to decrease the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power at a third preset speed when the second product value satisfies a preset second judgment condition, and otherwise, control the power battery to decrease the maximum discharge power to the fourth available maximum discharge power at a fourth preset speed, where the third preset speed is greater than the fourth preset speed.

[0092] It should be noted that the above description of the vehicle power battery control method embodiment is also applicable to the vehicle power battery control device of the embodiment, which will not be described here.

[0093] The vehicle power battery control device provided by the embodiment of the application can determine the available maximum discharge power of the vehicle power battery according to different whole vehicle working modes of the vehicle, thereby generating an optimal power output strategy of the power battery based on the available maximum discharge power, and controlling the power battery output power based on the optimal power output strategy and the actual load power demand of the vehicle, which greatly improves the available maximum discharge power of the battery under different working conditions, guarantees the whole vehicle power performance, and prolongs the service life of the power battery. Thus, the technical problem that the discharge capacity of the battery cannot be fully released due to different power compositions of the hybrid vehicle under different working modes in the related art, thereby reducing the service life of the battery, is solved.

[0094] Figure 4 The vehicle provided by the embodiment of the application is shown in the structural schematic diagram. The vehicle can include:

[0095] The memory 401, the processor 402, and the computer program stored in the memory 401 and executable on the processor 402.

[0096] The processor 402 implements the vehicle power battery control method provided in the above embodiments when executing the program.

[0097] Further, the vehicle further includes:

[0098] The communication interface 403 is configured to communicate between the memory 401 and the processor 402.

[0099] The memory 401 is configured to store the computer program executable on the processor 402.

[0100] The memory 401 can include a high-speed RAM memory, and can also include a non-volatile memory, for example, at least one disk memory.

[0101] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected with each other through a bus and complete communication between each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, Figure 4 Only one thick line is used in the figure to represent the bus, but it does not mean that there is only one bus or only one type of bus.

[0102] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can complete communication between each other through an internal interface.

[0103] The processor 402 can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0104] The embodiment also provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the power battery control method of the vehicle.

[0105] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0106] Moreover, the terms "first", "second", "third", etc. are used herein only to describe different steps or claims and do not imply a relative importance or a specific order of steps. Thus, a feature defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "N" is at least two, for example, two, three, etc., unless explicitly specifically defined otherwise.

[0107] Any process or method descriptions or blocks in flow charts described herein and elsewhere can be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process. Alternate implementations are included within the scope of the preferred embodiments of the present application in which additional functionality can be added or some functionality can be removed, by, for example, adding one or more steps performing a similar or new function, omitting one or more steps, or both. Such modifications and changes can be made to the processes and methods described herein and graphs without departing from the scope of the present application. The steps of the processes and methods described herein and elsewhere can be carried out in any order unless otherwise specifically limited. The steps of any of the processes and methods described herein and elsewhere can be repeated any number of times unless otherwise specifically limited. Although the drawings represent possible process flows, it is understood that the processes can include any number of additional or

[0108] The logic and / or steps represented in the flow charts described herein and elsewhere can be embodied in computer readable medium, which can be any available media that can be accessed by a general purpose or special purpose computer system, including the functional design of the computer system itself with the accompanying logic / functional circuitry that utilize it. By way of example, such computer readable medium can include RAM, ROM, EPROM, EEPROM, CD- ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired computer readable code in the form of computer-executable instructions or data structures and that can be accessed by a general purpose or special purpose computer system, including the functional design of the computer system itself with the accompanying logic / functional circuitry that utilize it. Computer readable medium can be transitory or non-transitory.

[0109] It should be understood that portions of the application can be realized with a combination of hardware, software, firmware, or their combination. In the above-described embodiments, the N steps or methods can be realized with software or firmware stored in a memory and executed by a suitable instruction execution system. As in another embodiment, if realized with hardware, any one or their combination of the following technologies known in the art can be used: discrete logic circuit with logic gate circuit for implementing logic functions on data signals, application specific integrated circuit with suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0110] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by a program instructing the relevant hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0111] In addition, the functional units in each embodiment of the present application can be integrated into one processing module, or each unit can be physically present separately, or two or more units can be integrated into one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software function module. The integrated module, if realized in the form of a software function module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0112] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A power storage device control method for a vehicle, characterized by, The method comprises the following steps: identifying a current vehicle working mode of a vehicle; determining an available maximum discharge power of a power battery of the vehicle according to the vehicle working mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power; and controlling the power battery output power based on the optimal power output strategy and an actual load power demand of the vehicle; wherein the determining the available maximum discharge power of the power battery of the vehicle according to the vehicle working mode, and the generating the optimal power output strategy of the power battery based on the available maximum discharge power, comprises: if the vehicle working mode is a hybrid working mode, querying a preset power table to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is greater than the second available maximum discharge power, and a strategy for controlling the power battery to output smoothly is based on the first available maximum discharge power and the second available maximum discharge power; wherein the first available maximum discharge power is a 30S discharge power in the hybrid working mode obtained by querying the preset power table; and the second available maximum discharge power is a continuous discharge power in the hybrid working mode obtained by querying the preset power table. wherein the strategy for controlling the power battery to output smoothly based on the first available maximum discharge power and the second available maximum discharge power comprises: calculating a first product value of a current and a voltage output by the power battery; judging whether the first product value meets a preset first judgment condition; if the first product value meets the preset first judgment condition, controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power at a first preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power at a second preset speed, wherein the first preset speed is greater than the second preset speed.

2. The method of claim 1, wherein, The identifying the current vehicle working mode of the vehicle comprises: obtaining power source state information of the vehicle; determining the current vehicle working mode of the vehicle according to the power source state information, wherein the current vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.

3. The method of claim 2, wherein, The determining the available maximum discharge power of the power battery of the vehicle according to the vehicle working mode, and the generating the optimal power output strategy of the power battery based on the available maximum discharge power, comprises: if the vehicle working mode is the cold start working mode, the optimal power output strategy is a strategy for maintaining the available maximum discharge power of the cold start working mode to output.

4. The method of claim 2, wherein, The determining the available maximum discharge power of the power battery of the vehicle according to the vehicle working mode, and the generating the optimal power output strategy of the power battery based on the available maximum discharge power, comprises: If the whole vehicle working mode is the pure electric working mode, a preset power table is inquired to obtain a third available maximum discharging power and a fourth available maximum discharging power of the pure electric working mode, wherein the third available maximum discharging power is greater than the fourth available maximum discharging power, and a strategy for controlling smooth output of the power battery based on the third available maximum discharging power and the fourth available maximum discharging power; Wherein the third available maximum discharging power is a 5S discharging power in the pure electric working mode obtained by inquiring a preset power table; and the fourth available maximum discharging power is a 10S discharging power in the pure electric working mode obtained by inquiring the preset power table.

5. The method of claim 4, wherein, The strategy for controlling smooth output of the power battery based on the third available maximum discharging power and the fourth available maximum discharging power includes: calculating a second product value of a current and a voltage output by the power battery; determining whether the second product value meets a preset second determination condition; If the second product value meets the preset second determination condition, controlling the power battery to reduce the available maximum discharging power from the third available maximum discharging power to the fourth available maximum discharging power at a third preset speed, otherwise, controlling the power battery to reduce the maximum discharging power to the fourth available maximum discharging power at a fourth preset speed, wherein the third preset speed is greater than the fourth preset speed.

6. A power storage device control apparatus for a vehicle, characterized by comprising: including: an identification module for identifying a current whole vehicle working mode of a vehicle; a generation module for determining an available maximum discharging power of a power battery of the vehicle according to the whole vehicle working mode, and generating an optimal power output strategy of the power battery based on the available maximum discharging power; and a control module for controlling power output of the power battery based on the optimal power output strategy and an actual load power demand of the vehicle; Wherein the generation module includes: a second acquisition unit for inquiring a preset power table to obtain a first available maximum discharging power and a second available maximum discharging power of a hybrid working mode when the whole vehicle working mode is the hybrid working mode, wherein the first available maximum discharging power is greater than the second available maximum discharging power, and a strategy for controlling smooth output of the power battery based on the first available maximum discharging power and the second available maximum discharging power; wherein the first available maximum discharging power is a 30S discharging power in the hybrid working mode obtained by inquiring a preset power table; and the second available maximum discharging power is a continuous discharging power in the hybrid working mode obtained by inquiring the preset power table. The second obtaining unit comprises: a first calculation sub-unit, configured to calculate a first product value of a current and a voltage output by the power battery; a first judgment sub-unit, configured to judge whether the first product value satisfies a preset first judgment condition; and a first control sub-unit, configured to control the power battery to reduce the available maximum discharging power from the first available maximum discharging power to the second available maximum discharging power at a first preset speed when the first product value satisfies the preset first judgment condition, or to control the power battery to reduce the maximum discharging power to the second available maximum discharging power at a second preset speed, otherwise, wherein the first preset speed is greater than the second preset speed.

7. A vehicle characterized by comprising: The application relates to a vehicle power battery control device. The computer readable storage medium stores a computer program which, when executed, implements the vehicle power battery control method of any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, ​

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