Battery energy management method and device for hybrid vehicle, vehicle and storage medium

Abstract

The application provides a battery energy management method and device of a hybrid vehicle, a storage medium and a vehicle, and belongs to the technical field of new energy vehicles. The method comprises the following steps: under the condition that a preset adaptive power adjustment function is activated, the current vehicle speed, the current ambient temperature and the current battery temperature of the hybrid vehicle are obtained; based on the current vehicle speed, the current ambient temperature and the current battery temperature, the preset residual capacity balance value of the power battery is adjusted to obtain a target residual capacity balance value; and under the condition that the residual capacity of the power battery is greater than the target residual capacity balance value, the hybrid vehicle is controlled to travel in a mode of preferentially consuming battery power. According to the application, the preset residual capacity balance value of the power battery can be adaptively adjusted by comprehensively considering the current vehicle speed, the current ambient temperature and the current battery temperature, so that the utilization rate of the power battery power is effectively improved, and the pure electric cruising range of the vehicle is maximally prolonged.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a battery energy management method, device, storage medium, and vehicle for hybrid vehicles. Background Technology

[0002] Plug-in hybrid electric vehicles (PHEVs) are a type of new energy vehicle that falls between pure electric vehicles and gasoline vehicles. They have the engine, transmission, drive system, fuel line and fuel tank of traditional vehicles, as well as the battery, electric motor and control circuit of pure electric vehicles. They combine the advantages of pure electric vehicles (EVs) and hybrid electric vehicles (HEVs), enabling pure electric, zero-emission driving, and also increasing the vehicle's driving range through hybrid mode.

[0003] For the power battery of plug-in hybrid vehicles, it is usually divided into CD (Charge Depleting) stage and CS (Charge Sustaining) stage. The initial state of the CD stage is that the battery of the plug-in hybrid vehicle is initially at full SOC (state of charge, also known as remaining capacity). After that, the vehicle's battery energy is consumed. When it is less than a certain SOC value, it enters the CS stage. This SOC value is the remaining capacity balance value of the power battery.

[0004] In related technologies, to prevent users from being unable to charge plug-in hybrid vehicles externally in a timely manner, the remaining capacity balance value is generally set to a relatively high fixed value, such as 20%. When the remaining capacity of the plug-in hybrid vehicle's power battery is lower than the remaining capacity balance value, it will switch from pure electric mode to hybrid mode to replenish the battery by consuming fuel to ensure power demand. However, this method makes it impossible to effectively utilize the power below the remaining capacity balance value, resulting in unnecessary power waste. Summary of the Invention

[0005] This application provides a battery energy management method, device, storage medium, and vehicle for hybrid vehicles to solve the problem in related technologies where the amount of power in a power battery below its remaining capacity balance value cannot be effectively utilized, resulting in unnecessary power waste.

[0006] To solve the above problems, this application adopts the following technical solution:

[0007] In a first aspect, embodiments of this application provide a battery energy management method for a hybrid vehicle, the method comprising:

[0008] When the preset adaptive power adjustment function is activated, the current vehicle speed, current ambient temperature, and current battery temperature of the power battery of the hybrid vehicle are obtained.

[0009] Based on the current vehicle speed, the current ambient temperature, and the current battery temperature, the preset remaining capacity balance value of the power battery is adjusted to obtain the target remaining capacity balance value.

[0010] When the remaining capacity of the power battery is greater than the target remaining capacity balance value, the hybrid vehicle is controlled to drive in a manner that prioritizes consuming battery power.

[0011] In one embodiment of this application, before the step of obtaining the current vehicle speed, current ambient temperature, and current battery temperature of the hybrid vehicle when the preset adaptive power adjustment function is activated, the method further includes:

[0012] Obtain the power mode, driving mode, and remaining capacity of the power battery of the hybrid vehicle;

[0013] The adaptive power adjustment function is activated when the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold.

[0014] In one embodiment of this application, the step of adjusting the preset remaining capacity balance value of the power battery based on the current vehicle speed, the current ambient temperature, and the current battery temperature to obtain a target remaining capacity balance value includes:

[0015] Based on the current vehicle speed, the current ambient temperature, and the current battery temperature, a target correction value is determined;

[0016] Based on the target correction value, the preset remaining capacity balance value of the power battery is adjusted to obtain the target remaining capacity balance value.

[0017] In one embodiment of this application, the step of determining a target correction value based on the current vehicle speed, the current ambient temperature, and the current battery temperature includes:

[0018] Based on the current vehicle speed and the current ambient temperature, a first correction value is determined;

[0019] Based on the current vehicle speed and the current battery temperature, a second correction value is determined;

[0020] The larger of the first correction value and the second correction value is determined as the target correction value.

[0021] In one embodiment of this application, after the step of controlling the hybrid vehicle to operate in a manner that prioritizes consuming battery power when the remaining capacity of the power battery is greater than the target remaining capacity balance value, the method further includes:

[0022] When the remaining capacity of the power battery decreases to the preset remaining capacity balance value at a historical time, the total historical driving mileage corresponding to that historical time is recorded.

[0023] If the difference between the current total mileage and the historical total mileage of the hybrid vehicle at the current moment is greater than a distance threshold, the adaptive power adjustment function will be deactivated.

[0024] In one embodiment of this application, after adjusting the preset remaining capacity balance value of the power battery based on the current vehicle speed, the current ambient temperature, and the current battery temperature to obtain the target remaining capacity balance value, the method further includes:

[0025] Obtain a preset direct drive mode enable value; the direct drive mode enable value represents the minimum remaining capacity of the power battery to satisfy the vehicle's entry into direct drive mode;

[0026] If the target remaining capacity balance value is greater than or equal to the direct drive mode enable value, the target remaining capacity balance value remains unchanged.

[0027] If the target remaining capacity balance value is less than the direct drive mode enable value, the direct drive mode enable value is determined as the final target remaining capacity balance value.

[0028] In one embodiment of this application, after activating the adaptive power adjustment function when the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold, the method further includes:

[0029] If the power mode is not pure electric priority mode, or the driving mode is not standard mode, or the remaining capacity of the power battery is less than or equal to the target remaining capacity balance value, the adaptive power adjustment function will be deactivated.

[0030] Secondly, based on the same inventive concept, embodiments of this application provide a battery energy management device for a hybrid vehicle, the device comprising:

[0031] The acquisition module is used to acquire the current vehicle speed, current ambient temperature, and current battery temperature of the power battery of the hybrid vehicle when the preset adaptive power adjustment function is activated.

[0032] The adjustment module is used to adjust the preset remaining capacity balance value of the power battery based on the current vehicle speed, the current ambient temperature and the current battery temperature to obtain the target remaining capacity balance value.

[0033] The control module is used to control the hybrid vehicle to drive in a manner that prioritizes consuming battery power when the remaining capacity of the power battery is greater than the target remaining capacity balance value.

[0034] In one embodiment of this application, the battery energy management device for the hybrid vehicle further includes:

[0035] The acquisition submodule is used to acquire the power mode, driving mode and remaining capacity of the power battery of the hybrid vehicle;

[0036] The function activation submodule is used to activate the adaptive power adjustment function when the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold.

[0037] In one embodiment of this application, the adjustment module includes:

[0038] The target correction value determination submodule is used to determine the target correction value based on the current vehicle speed, the current ambient temperature, and the current battery temperature.

[0039] The adjustment submodule is used to adjust the preset remaining capacity balance value of the power battery based on the target correction value to obtain the target remaining capacity balance value.

[0040] In one embodiment of this application, the target correction value determination submodule includes:

[0041] The first correction value determination unit is used to determine a first correction value based on the current vehicle speed and the current ambient temperature;

[0042] The second correction value determination unit is used to determine a second correction value based on the current vehicle speed and the current battery temperature;

[0043] The target correction value determination unit is used to determine the larger of the first correction value and the second correction value as the target correction value.

[0044] In one embodiment of this application, the battery energy management device for the hybrid vehicle further includes:

[0045] The recording module is used to record the total historical mileage corresponding to the historical moment when the remaining capacity of the power battery decreases to the preset remaining capacity balance value at a historical moment.

[0046] The first function exit module is used to exit the adaptive power adjustment function when it is detected that the difference between the current total mileage and the historical total mileage of the hybrid vehicle at the current moment is greater than a distance threshold.

[0047] In one embodiment of this application, the battery energy management device for the hybrid vehicle further includes:

[0048] The enable value acquisition module is used to acquire a preset direct drive mode enable value; the direct drive mode enable value represents the minimum remaining capacity of the power battery to satisfy the vehicle's entry into direct drive mode.

[0049] The holding module is used to keep the target remaining capacity balance value unchanged when the target remaining capacity balance value is greater than or equal to the direct drive mode enable value;

[0050] The determination module is used to determine the direct drive mode enable value as the final target remaining capacity balance value when the target remaining capacity balance value is less than the direct drive mode enable value.

[0051] In one embodiment of this application, the battery energy management device for the hybrid vehicle further includes:

[0052] The second function exit module is used to exit the adaptive power adjustment function when it is detected that the power mode is not the pure electric priority mode, or the driving mode is not the standard mode, or the remaining capacity of the power battery is less than or equal to the target remaining capacity balance value.

[0053] Thirdly, based on the same inventive concept, embodiments of this application provide a storage medium storing machine-executable instructions, which, when executed by a processor, implement the battery energy management method for hybrid vehicles proposed in the first aspect of this application.

[0054] Fourthly, based on the same inventive concept, embodiments of this application provide a vehicle including a processor and a memory. The memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the battery energy management method for a hybrid vehicle proposed in the first aspect of this application.

[0055] Compared with the prior art, this application has the following advantages:

[0056] This application provides a battery energy management method for a hybrid vehicle, comprising: acquiring the current vehicle speed, current ambient temperature, and current battery temperature of the power battery when a preset adaptive power adjustment function is activated; adjusting a preset remaining capacity balance value of the power battery based on the current vehicle speed, current ambient temperature, and current battery temperature to obtain a target remaining capacity balance value; and controlling the hybrid vehicle to drive in a manner that prioritizes battery power consumption when the remaining capacity of the power battery is greater than the target remaining capacity balance value. This application embodiment, by comprehensively considering the current vehicle speed, current ambient temperature, and current battery temperature, can adaptively adjust the preset remaining capacity balance value of the power battery, thereby effectively improving the utilization rate of the power battery power and maximizing the pure electric driving range of the vehicle. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a flowchart illustrating the steps of a battery energy management method for a hybrid vehicle according to an embodiment of this application.

[0059] Figure 2 This is a schematic diagram of the functional modules of a battery energy management device for a hybrid vehicle according to one embodiment of this application.

[0060] Figure 3 This is a structural schematic diagram of a vehicle according to one embodiment of this application. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] It should be noted that, for economic and environmental reasons, the default power mode of plug-in hybrid vehicles is usually pure electric priority, meaning they operate by prioritizing battery power. After a plug-in hybrid vehicle transitions from the CD (Distributed Electric) stage to the CS (Continuous Electric) stage, it will switch from pure electric mode to hybrid mode to ensure the user can charge the vehicle externally in a timely manner.

[0063] However, based on actual driving experience, the inventors of this application have discovered that when the power battery is within its suitable operating temperature range or the vehicle is traveling at a lower speed, the power battery can output more electricity to drive the vehicle without affecting its power demand. However, in traditional hybrid vehicle battery energy management strategies, when the remaining capacity of the plug-in hybrid vehicle's power battery falls below the remaining capacity balance value, it switches from pure electric mode to hybrid mode. Since the remaining capacity balance value is fixed, it cannot be flexibly adjusted according to the actual situation of the vehicle. This means that electricity below the remaining capacity balance value not only cannot be effectively utilized but also reduces the vehicle's pure electric range, affecting the user experience.

[0064] In view of the deficiencies of the above-mentioned background technology, this application aims to provide a battery energy management method for hybrid vehicles, which can adaptively adjust the preset remaining capacity balance value of the power battery based on the current vehicle speed, current ambient temperature and current battery temperature, thereby effectively improving the utilization rate of the power battery and maximizing the pure electric driving range of the vehicle.

[0065] Reference Figure 1 This application illustrates a battery energy management method for a hybrid vehicle, which may include the following steps:

[0066] S101: When the preset adaptive power adjustment function is activated, obtain the current vehicle speed, current ambient temperature, and current battery temperature of the hybrid vehicle.

[0067] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, or an electronic device with the above functions, such as a vehicle computer, an on-board computer, such as an ECU (Electronic Control Unit), a BCM (Body Control Module), or a VCU (Vehicle Control Unit). This embodiment will use a VCU as the executing entity for explanation. It should also be noted that this embodiment does not impose specific limitations on the executing entity of the vehicle.

[0068] In this embodiment, the VCU can determine whether the vehicle meets the conditions for activating the adaptive power adjustment function based on the vehicle's current operating condition information. If the activation conditions are met, the adaptive power adjustment function can be automatically activated. For example, when the remaining capacity of the power battery is detected to be high, such as when the power battery has finished charging and the remaining capacity is close to full charge, the adaptive power adjustment function can be automatically activated to adjust the preset remaining capacity balance value.

[0069] In this embodiment, by obtaining the current speed of the hybrid vehicle, the driver's power demand can be determined. When the power demand is lower, the preset remaining capacity balance value can be appropriately reduced. By obtaining the current ambient temperature of the hybrid vehicle and the current battery temperature of the power battery, it can be determined whether the power battery is operating within a suitable temperature range. If the power battery is operating within a suitable temperature range, the preset remaining capacity balance value can also be appropriately reduced so that the power battery can output more power.

[0070] In this embodiment, considering that the battery temperature of different cells in the power battery may vary during the operation of the power battery, the maximum value of the battery temperature of all cells in the power battery can be used as the current battery temperature of the power battery. This can avoid the power battery from being damaged by operating under high temperature and low charge conditions for a long time when the overall average battery temperature of the power battery is low and the temperature of a certain cell is high.

[0071] S102: Based on the current vehicle speed, current ambient temperature, and current battery temperature, adjust the preset remaining capacity balance value of the power battery to obtain the target remaining capacity balance value.

[0072] It should be noted that the preset remaining capacity balance value is the proportion of the remaining capacity of the hybrid vehicle's power battery to the total capacity of the power battery when the remaining capacity during charging and discharging are balanced. The preset remaining capacity balance value is a pre-set calibration value for the hybrid vehicle, usually 20% of the larger value.

[0073] In this embodiment, by comprehensively considering factors such as current vehicle speed, current ambient temperature, and current battery temperature, the preset remaining capacity balance value is adjusted, which can adaptively reduce the preset remaining capacity balance value. Since the target remaining capacity balance value is less than the preset remaining capacity balance value, the vehicle can enter the CS phase after consuming more power battery power.

[0074] In practice, a mapping relationship can be established between the current vehicle speed, current ambient temperature, and current battery temperature and the target remaining capacity balance value. Then, the target remaining capacity balance value corresponding to the current vehicle speed, current ambient temperature, and current battery temperature can be determined by looking up the table.

[0075] S103: When the remaining capacity of the power battery is greater than the target remaining capacity balance value, control the hybrid vehicle to drive in a way that prioritizes consuming battery power.

[0076] In this embodiment, since the target remaining capacity balance value is less than the original preset remaining capacity balance value, the hybrid vehicle can use more of the power battery's charge during vehicle operation.

[0077] For example, if the preset remaining capacity balance value is 20%, and the target remaining capacity balance value is 15% after adjustment, then the hybrid vehicle can utilize 5% more of the power battery's charge, thus extending the pure electric driving range.

[0078] It should be noted that when the remaining capacity of the power battery is greater than the target remaining capacity balance value, the hybrid vehicle will default to driving in pure electric mode that only consumes battery power, such as pure electric rear-wheel drive mode or pure electric four-wheel drive mode. However, when the driver has a high power demand, such as when the driver accelerates and overtakes with a large throttle, the hybrid vehicle is allowed to switch from pure electric mode to other power modes that consume fuel, such as series mode or direct drive mode, in order to meet the driver's power demand in special situations.

[0079] In this embodiment, by controlling the hybrid vehicle to operate in a manner that prioritizes the consumption of battery power, the power battery and fuel energy can be managed more rationally. This not only effectively improves the utilization rate of the power battery power, but also maximizes the pure electric range of the vehicle, thereby enhancing the user experience.

[0080] In one feasible implementation, prior to S101, the battery energy management method for hybrid vehicles may further include the following steps:

[0081] S201: Obtain the power mode, driving mode, and remaining capacity of the power battery of the hybrid vehicle.

[0082] It should be noted that "Power Mode" refers to the power output mode of the vehicle's powertrain, which can include pure electric mode and hybrid mode. Pure electric mode consumes only battery power, such as pure electric rear-wheel drive or pure electric four-wheel drive. Hybrid mode consumes both battery power and fuel, such as series hybrid or direct drive. "Drive Mode" refers to the vehicle's driving mode, such as Eco mode, Standard mode, Sport mode, and Snow mode.

[0083] In this embodiment, the VCU records the current power mode and driving mode of the hybrid vehicle to determine whether the user needs to activate the engine. For example, if the user selects hybrid mode as the power mode or sport mode as the driving mode, it means that the driver needs to start the engine to drive the vehicle, and there is no need to activate the adaptive battery adjustment function.

[0084] In this embodiment, the VCU can determine whether the power battery has enough charge to drive the vehicle by obtaining the remaining capacity of the power battery. For example, if the remaining capacity of the power battery is detected to be low, the adaptive charge adjustment function will not be activated.

[0085] S202: When the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold, the adaptive power adjustment function is activated.

[0086] It should be noted that when the vehicle's HUT (Host and Utility Test) account is not logged in, the default power mode is usually pure electric priority mode, and the default driving mode is usually standard mode. Therefore, the driver can activate the adaptive battery adjustment function the first time they drive the vehicle.

[0087] In this embodiment, when the power mode is detected to be pure electric priority mode and the driving mode is standard mode, it indicates that the user does not require engine use; at the same time, the remaining capacity of the power battery is greater than the remaining capacity threshold, indicating that there is sufficient remaining capacity to drive the vehicle. At this time, the vehicle is considered to meet the activation conditions of the adaptive power adjustment function, and the adaptive power adjustment function is automatically activated so that during vehicle operation, the preset remaining capacity balance value can be adaptively adjusted to improve the utilization rate of the power battery.

[0088] In one feasible implementation, S101 may specifically include the following steps:

[0089] S101-1: Determine the target correction value based on the current vehicle speed, current ambient temperature, and current battery temperature.

[0090] In this embodiment, considering that the power battery is greatly affected by temperature, and the temperature effect can be further divided into the effect of its own temperature and the effect of the external ambient temperature, in order to effectively distinguish the different effects of the two on the battery, the impact of the current ambient temperature and the current battery temperature on the power battery will be quantified in conjunction with the vehicle.

[0091] In practical implementation, a first correction value can be determined based on the current vehicle speed and current ambient temperature; simultaneously, a second correction value can be determined based on the current vehicle speed and current battery temperature; finally, the larger of the first and second correction values ​​is determined as the target correction value. Referring to Tables 1 and 2, examples of the mapping relationships between the current vehicle speed and current ambient temperature and the first correction value, and the mapping relationship between the current vehicle speed and current battery temperature and the second correction value are shown respectively.

[0092] Table 1. Mapping Relationship Between Current Vehicle Speed, Current Ambient Temperature, and the First Correction Value

[0093]

[0094] It should be noted that in Table 1, X represents the current vehicle speed in km / h; Y represents the current ambient temperature in °C; and α represents the first correction value in %. Wherein, α0-α 103The specific value can be obtained through experimental calibration. Different current ambient temperatures Y at different current vehicle speeds X can correspond to different first correction values ​​α.

[0095] Table 2. Mapping relationship between current vehicle speed, current battery temperature, and the second correction value.

[0096]

[0097] It should be noted that in Table 2, X represents the current vehicle speed in km / h; Z represents the current battery temperature in °C; and β represents the second correction value in %. Wherein, β0-β 103 Based on experimental calibration, different current battery temperatures Z at different current vehicle speeds X correspond to different second correction values ​​β.

[0098] In this embodiment, both the first correction value and the second correction value are negative values. The absolute value of the first correction value represents the extent to which the preset remaining capacity balance value can be reduced under the current vehicle speed and current ambient temperature, and the absolute value of the second correction value represents the extent to which the preset remaining capacity balance value can be reduced under the current vehicle speed and current battery temperature.

[0099] In this embodiment, by taking the larger of the first correction value and the second correction value as the target correction value, it is possible to avoid the preset remaining capacity balance value from dropping too much, which would affect the normal use of the power battery.

[0100] S101-2: Based on the target correction value, adjust the preset remaining capacity balance value of the power battery to obtain the target remaining capacity balance value.

[0101] It should be noted that the target correction value is usually negative, indicating a downward adjustment of the original preset remaining capacity balance value. Therefore, the target remaining capacity balance value can be obtained by adding the preset remaining capacity balance value to the target correction value.

[0102] For example, if the preset remaining capacity balance value is 20%, and the first correction value is -10% and the second correction value is -5%, the larger value of the first correction value and the second correction value, -5%, will be selected as the target correction value, thereby obtaining a target remaining capacity balance value of 15%.

[0103] In one feasible implementation, after S103, the battery energy management method for hybrid vehicles may further include the following steps:

[0104] S301: When the remaining capacity of the power battery decreases to the preset remaining capacity balance value at a historical time, record the total historical driving mileage corresponding to that historical time.

[0105] In this embodiment, by recording the total historical mileage at the moment when the remaining capacity of the power battery decreases to a preset remaining capacity balance value, the distance traveled by the vehicle can be recorded during subsequent vehicle driving to determine whether the driver intends to charge the battery.

[0106] S302: If the difference between the current total mileage and the historical total mileage of the hybrid vehicle at the current moment is greater than the distance threshold, the adaptive power adjustment function will be deactivated.

[0107] It should be noted that the historical total mileage represents the total mileage of the vehicle recorded at historical time T1; the current total mileage is the total mileage of the vehicle recorded at the current time T2, where T2 > T1.

[0108] In this embodiment, when the difference between the current total mileage and the historical total mileage of the hybrid vehicle at the current moment is detected to be greater than the distance threshold, it indicates that the driver will continue to drive with the power battery at a low charge level and has no intention of charging. At this time, the adaptive power adjustment function will be deactivated in advance, and the battery will be recharged by consuming fuel to ensure the vehicle's power needs and meet the driver's long-distance driving needs.

[0109] For example, the distance threshold can be set to 30 km. That is, if the remaining capacity of the power battery drops to the preset remaining capacity balance value and the driver has driven continuously for 30 km, it means that there are no available charging piles around the vehicle or the driver does not intend to charge. At this time, the adaptive power adjustment function will be exited, and the original preset remaining capacity balance value will be used as the balance value for entering the CS stage for energy management.

[0110] In this embodiment, the adaptive power adjustment function will also be deactivated when the difference between the current total mileage and the historical total mileage is less than the second distance threshold, where the second distance threshold can be set to 0 km. In other words, if the current total mileage is detected to be less than the historical total mileage, it indicates that the vehicle's total mileage recording function has malfunctioned, and the adaptive power adjustment function will be deactivated.

[0111] In one feasible implementation, after S102, the battery energy management method for hybrid vehicles may further include the following steps:

[0112] S401: Obtain the preset direct drive mode enable value.

[0113] It should be noted that the direct drive mode enable value represents the minimum remaining capacity of the power battery required for the vehicle to enter direct drive mode. In other words, when the remaining capacity of the power battery is greater than the direct drive mode enable value, the vehicle can switch to direct drive mode. In direct drive mode, the front drive motor, rear drive motor, and engine are all in a driving state, with the engine power directly driving the vehicle through the front axle transmission.

[0114] S402: If the target remaining capacity balance value is greater than or equal to the direct drive mode enable value, keep the target remaining capacity balance value unchanged.

[0115] S403: If the target remaining capacity balance value is less than the direct drive mode enable value, the direct drive mode enable value will be determined as the final target remaining capacity balance value.

[0116] In this embodiment, considering that the vehicle will not be able to switch to direct drive mode smoothly when the remaining capacity of the power battery is less than the direct drive mode enable value, in order to avoid this phenomenon, after adjusting the preset remaining capacity balance value of the power battery based on the current vehicle speed, current ambient temperature, and current battery temperature to obtain the target remaining capacity balance value, the target remaining capacity balance value is compared with the direct drive mode enable value. If the target remaining capacity balance value is greater than or equal to the direct drive mode enable value, it means that the target remaining capacity balance value can enable the vehicle to enter direct drive mode, and no adjustment is made; if the target remaining capacity balance value is less than the direct drive mode enable value, it means that the target remaining capacity balance value is insufficient to enable the vehicle to enter direct drive mode, and the direct drive mode enable value is determined as the final target remaining capacity balance value.

[0117] In this embodiment, the target remaining capacity balance value is adjusted a second time by the direct drive mode enable value, which can effectively meet the driver's strong power demand. The driver can control the vehicle to enter the direct drive mode at any time according to the power demand, thereby avoiding the situation where the direct drive mode switching fails and affects the user's driving experience.

[0118] In one feasible implementation, after S103, the battery energy management method for hybrid vehicles may further include the following steps:

[0119] S501: If the power mode is not pure electric priority mode, or the driving mode is not standard mode, or the remaining capacity of the power battery is less than or equal to the target remaining capacity balance value, the adaptive power adjustment function will be deactivated.

[0120] In this embodiment, if the vehicle is detected to not meet any of the activation conditions of the adaptive power adjustment function during driving, the adaptive power adjustment function will be deactivated.

[0121] For example, if the remaining capacity of the power battery is detected to be less than or equal to the target remaining capacity balance value, it means that the power battery has been fully discharged and is at a low charge level. At this time, the adaptive charge adjustment function will be deactivated, and the power battery will be charged with the original preset remaining capacity balance value as the balance value for entering the CS stage, so that the remaining capacity of the power battery can be maintained at least at the preset remaining capacity balance value. Alternatively, when the driver drives from a low-speed urban area to a high-speed suburban area or an elevated road, the power mode will be switched to hybrid mode, or the driving mode will be switched to power mode. At this time, the adaptive charge adjustment function will be deactivated to provide the driver with sufficient power.

[0122] The battery energy management method for hybrid vehicles provided in this application comprehensively considers the current vehicle speed, current ambient temperature, and current battery temperature of the power battery. It can adaptively adjust the preset remaining capacity balance value of the power battery, making energy management more reasonable, effectively extending the pure electric driving range of the vehicle, and improving the vehicle's economy. At the same time, it sets flexible adaptive power adjustment function exit conditions for various scenarios, which can effectively avoid affecting the normal driving needs of users in various scenarios.

[0123] Secondly, based on the same inventive concept, and referring to... Figure 2 This application provides a battery energy management device 200 for a hybrid vehicle, which includes:

[0124] The acquisition module 201 is used to acquire the current vehicle speed, current ambient temperature and current battery temperature of the hybrid vehicle when the preset adaptive power adjustment function is activated.

[0125] The adjustment module 202 is used to adjust the preset remaining capacity balance value of the power battery based on the current vehicle speed, current ambient temperature and current battery temperature, so as to obtain the target remaining capacity balance value.

[0126] The control module 203 is used to control the hybrid vehicle to drive in a manner that prioritizes the consumption of battery power when the remaining capacity of the power battery is greater than the target remaining capacity balance value.

[0127] In one embodiment of this application, the battery energy management device 200 for a hybrid vehicle further includes:

[0128] The acquisition submodule is used to acquire the hybrid vehicle's power mode, driving mode, and remaining battery capacity.

[0129] The function activation submodule is used to activate the adaptive power adjustment function when the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold.

[0130] In one embodiment of this application, the adjustment module 202 includes:

[0131] The target correction value determination submodule is used to determine the target correction value based on the current vehicle speed, current ambient temperature, and current battery temperature.

[0132] The adjustment submodule is used to adjust the preset remaining capacity balance value of the power battery based on the target correction value to obtain the target remaining capacity balance value.

[0133] In one embodiment of this application, the target correction value determination submodule includes:

[0134] The first correction value determination unit is used to determine the first correction value based on the current vehicle speed and the current ambient temperature;

[0135] The second correction value determination unit is used to determine the second correction value based on the current vehicle speed and the current battery temperature;

[0136] The target correction value determination unit is used to determine the larger of the first correction value and the second correction value as the target correction value.

[0137] In one embodiment of this application, the battery energy management device 200 for a hybrid vehicle further includes:

[0138] The recording module is used to record the total historical mileage at a historical moment when the remaining capacity of the power battery decreases to a preset remaining capacity balance value.

[0139] The first function exit module is used to exit the adaptive power adjustment function when the difference between the current total mileage and the historical total mileage of the hybrid vehicle at the current moment is greater than the distance threshold.

[0140] In one embodiment of this application, the battery energy management device for a hybrid vehicle further includes:

[0141] The enable value acquisition module is used to acquire the preset direct drive mode enable value; the direct drive mode enable value represents the minimum remaining capacity of the power battery to allow the vehicle to enter direct drive mode.

[0142] The holding module is used to keep the target remaining capacity balance value unchanged when the target remaining capacity balance value is greater than or equal to the direct drive mode enable value;

[0143] The determination module is used to determine the direct drive mode enable value as the final target remaining capacity balance value when the target remaining capacity balance value is less than the direct drive mode enable value.

[0144] In one embodiment of this application, the battery energy management device 200 for a hybrid vehicle further includes:

[0145] The second function exit module is used to exit the adaptive power adjustment function when the power mode is not pure electric priority mode, or the driving mode is not standard mode, or the remaining capacity of the power battery is less than or equal to the target remaining capacity balance value.

[0146] It should be noted that the specific implementation of the battery energy management device 200 for hybrid vehicles in this application embodiment refers to the specific implementation of the battery energy management method for hybrid vehicles proposed in the first aspect of the aforementioned application embodiment, and will not be repeated here.

[0147] Thirdly, based on the same inventive concept, embodiments of this application provide a storage medium storing machine-executable instructions, which, when executed by a processor, implement the battery energy management method for hybrid vehicles proposed in the first aspect of embodiments of this application.

[0148] It should be noted that the specific implementation of the storage medium in this application embodiment refers to the specific implementation of the battery energy management method for hybrid vehicles proposed in the first aspect of the above-mentioned application embodiment, and will not be repeated here.

[0149] Fourthly, based on the same inventive concept, referring to Figure 3 This application provides a vehicle 300, including a processor 301 and a memory 302; the memory 302 stores machine-executable instructions that can be executed by the processor 301, and the processor 301 is used to execute the machine-executable instructions to implement the battery energy management method for hybrid vehicles proposed in the first aspect.

[0150] It should be noted that the specific implementation of the vehicle 300 in this application embodiment refers to the specific implementation of the battery energy management method for hybrid vehicles proposed in the first aspect of the aforementioned application embodiment, and will not be repeated here.

[0151] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, embodiments of the present invention can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0152] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0153] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0154] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0155] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0156] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0157] The present invention provides a detailed description of a battery energy management method, device, storage medium, and vehicle for hybrid vehicles. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery energy management method for a hybrid vehicle, characterized in that, The method includes: When the preset adaptive power adjustment function is activated, the current vehicle speed, current ambient temperature, and current battery temperature of the hybrid vehicle are obtained; the current battery temperature of the power battery is the maximum value among the battery temperatures of all cells in the power battery. Based on the current vehicle speed, the current ambient temperature, and the current battery temperature, the preset remaining capacity balance value of the power battery is adjusted to obtain the target remaining capacity balance value. When the remaining capacity of the power battery is greater than the target remaining capacity balance value, the hybrid vehicle is controlled to drive in a manner that prioritizes consuming battery power. The step of adjusting the preset remaining capacity balance value of the power battery based on the current vehicle speed, the current ambient temperature, and the current battery temperature to obtain the target remaining capacity balance value includes: Based on the current vehicle speed, the current ambient temperature, and the current battery temperature, a target correction value is determined; Based on the target correction value, the preset remaining capacity balance value of the power battery is adjusted to obtain the target remaining capacity balance value; wherein, the target correction value is negative, indicating that the preset remaining capacity balance value of the power battery is reduced; the preset remaining capacity balance value of the power battery is added to the target correction value to obtain the target remaining capacity balance value. The step of determining the target correction value based on the current vehicle speed, the current ambient temperature, and the current battery temperature includes: Based on the current vehicle speed and the current ambient temperature, a first correction value is determined; different current ambient temperatures at different current vehicle speeds correspond to different first correction values; A second correction value is determined based on the current vehicle speed and the current battery temperature; different current battery temperatures at different current vehicle speeds correspond to different second correction values; The larger of the first correction value and the second correction value is determined as the target correction value.

2. The battery energy management method for hybrid vehicles according to claim 1, characterized in that, Before obtaining the current vehicle speed, current ambient temperature, and current battery temperature of the hybrid vehicle when the preset adaptive power adjustment function is activated, the method further includes: Obtain the power mode, driving mode, and remaining capacity of the power battery of the hybrid vehicle; The adaptive power adjustment function is activated when the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold.

3. The battery energy management method for hybrid vehicles according to claim 1, characterized in that, After the step of controlling the hybrid vehicle to operate in a manner that prioritizes consuming battery power when the remaining capacity of the power battery is greater than the target remaining capacity balance value, the method further includes: When the remaining capacity of the power battery decreases to the preset remaining capacity balance value at a historical time, the total historical driving mileage corresponding to that historical time is recorded. If the difference between the current total mileage and the historical total mileage of the hybrid vehicle at the current moment is greater than a distance threshold, the adaptive power adjustment function will be deactivated.

4. The battery energy management method for hybrid vehicles according to claim 1, characterized in that, After adjusting the preset remaining capacity balance value of the power battery based on the current vehicle speed, the current ambient temperature, and the current battery temperature to obtain the target remaining capacity balance value, the method further includes: Obtain a preset direct drive mode enable value; the direct drive mode enable value represents the minimum remaining capacity of the power battery to satisfy the vehicle's entry into direct drive mode; If the target remaining capacity balance value is greater than or equal to the direct drive mode enable value, the target remaining capacity balance value remains unchanged. If the target remaining capacity balance value is less than the direct drive mode enable value, the direct drive mode enable value is determined as the final target remaining capacity balance value.

5. The battery energy management method for hybrid vehicles according to claim 2, characterized in that, After activating the adaptive power adjustment function when the power mode is pure electric priority mode, the driving mode is standard mode, and the remaining capacity of the power battery is greater than the remaining capacity threshold, the method further includes: If the power mode is not pure electric priority mode, or the driving mode is not standard mode, or the remaining capacity of the power battery is less than or equal to the target remaining capacity balance value, the adaptive power adjustment function will be deactivated.

6. A battery energy management device for a hybrid vehicle, characterized in that, The device includes: The acquisition module is used to acquire the current vehicle speed, current ambient temperature, and current battery temperature of the hybrid vehicle when the preset adaptive power adjustment function is activated; the current battery temperature of the power battery is the maximum value among the battery temperatures of all cells in the power battery. The adjustment module is used to adjust the preset remaining capacity balance value of the power battery based on the current vehicle speed, the current ambient temperature and the current battery temperature, so as to obtain the target remaining capacity balance value. The control module is used to control the hybrid vehicle to drive in a manner that prioritizes consuming battery power when the remaining capacity of the power battery is greater than the target remaining capacity balance value. The adjustment module includes: The target correction value determination submodule is used to determine the target correction value based on the current vehicle speed, the current ambient temperature, and the current battery temperature; An adjustment submodule is used to adjust the preset remaining capacity balance value of the power battery based on the target correction value to obtain the target remaining capacity balance value; wherein, the target correction value is negative, indicating that the preset remaining capacity balance value of the power battery is reduced; the preset remaining capacity balance value of the power battery is added to the target correction value to obtain the target remaining capacity balance value; The target correction value determination submodule includes: The first correction value determination unit is used to determine a first correction value based on the current vehicle speed and the current ambient temperature; different current ambient temperatures at different current vehicle speeds correspond to different first correction values; The second correction value determination unit is used to determine a second correction value based on the current vehicle speed and the current battery temperature; different current battery temperatures at different current vehicle speeds correspond to different second correction values; The target correction value determination unit is used to determine the larger of the first correction value and the second correction value as the target correction value.

7. A storage medium, characterized in that, The storage medium stores machine-executable instructions, which, when executed by a processor, implement the battery energy management method for hybrid vehicles as described in any one of claims 1-5.

8. A vehicle, characterized in that, The device includes a processor and a memory, the memory storing machine-executable instructions that can be executed by the processor, the processor executing the machine-executable instructions to implement the battery energy management method for a hybrid vehicle as described in any one of claims 1-5.

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