Low-voltage battery charging cut-off electric quantity determination method, device and equipment and storage medium

Abstract

The invention discloses a low-voltage battery charging cut-off electric quantity determination method and device, equipment and a storage medium, and relates to the technical field of vehicles. The method comprises the following steps: acquiring the minimum charging cut-off electric quantity of a first low-voltage battery, first energy consumed by a first high-voltage battery in a preset time period of charging the first low-voltage battery, and second energy obtained by charging the first low-voltage battery; and determining the charging efficiency of the first high-voltage battery for charging the first low-voltage battery, determining a first charging cut-off electric quantity corresponding to the charging efficiency according to a corresponding relation between the charging efficiency and the charging cut-off electric quantity, and determining a target charging cut-off electric quantity of the first low-voltage battery according to the minimum charging cut-off electric quantity and the first charging cut-off electric quantity. According to the embodiment of the invention, the optimal opportunity for stopping charging can be determined according to the target charging cut-off electric quantity, and excessive consumption of extra electric quantity caused by overlong charging process time is avoided.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular, relates to a method, device, equipment, storage medium and computer program product for determining a low-voltage battery recharging cut-off power. Background Art

[0002] Usually, cars are equipped with 12V low-voltage batteries to power low-voltage electrical appliances in the car. When the vehicle is parked, the power of the low-voltage battery will be slowly consumed. Long-term parking of the vehicle can easily lead to low-voltage battery power. The vehicle needs to be pumped to start again, which brings inconvenience to users. For new energy vehicles, when the power of the low-voltage battery drops to a certain level, the energy of the power battery can be used to recharge the low-voltage battery.

[0003] The existing power battery has a fixed cut-off value for charging the low-voltage battery. In this way, when charging, the charging will only stop when the amount of power obtained by charging the low-voltage battery reaches the fixed value. However, since the relevant controllers in the car are awakened at the same time during the charging process, the controllers will consume a considerable amount of power. Stopping the charging according to the fixed value will extend the charging time, causing excessive additional power consumption during the charging process. Summary of the invention

[0004] The embodiments of the present application provide a method, device, equipment, storage medium and computer program product for determining a low-voltage battery charging cut-off power, which can determine the best time to stop charging according to a target charging cut-off power, thereby avoiding excessive consumption of extra power due to a long charging process.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a low-voltage battery charging cut-off power, the method comprising:

[0006] Acquire the minimum charging cut-off power of the first low-voltage battery, the first energy consumed by the first high-voltage battery within a preset period of time when charging the first low-voltage battery, and the second energy obtained by charging the first low-voltage battery;

[0007] Determining, according to the first energy and the second energy, a power replenishment efficiency of the first high-voltage battery for the first low-voltage battery;

[0008] According to the corresponding relationship between the power replenishment efficiency and the power replenishment cut-off power, determining a first power replenishment cut-off power corresponding to the power replenishment efficiency;

[0009] A target power-recharging cut-off power of the first low-voltage battery is determined according to the minimum power-recharging cut-off power and the first power-recharging cut-off power.

[0010] In a second aspect, an embodiment of the present application provides a device for determining a low-voltage battery charging cut-off power, the device comprising:

[0011] An acquisition module, used to acquire a minimum charging cut-off power of the first low-voltage battery, a first energy consumed by the first high-voltage battery within a preset period of time when charging the first low-voltage battery, and a second energy obtained by charging the first low-voltage battery;

[0012] A determination module, configured to determine a power replenishment efficiency of the first high-voltage battery for replenishing power to the first low-voltage battery according to the first energy and the second energy;

[0013] The determination module is further used to determine a first power supplement cut-off power corresponding to the power supplement efficiency according to the corresponding relationship between the power supplement efficiency and the power supplement cut-off power;

[0014] The determination module is further used to determine a target power-recharging cut-off power of the first low-voltage battery according to the minimum power-recharging cut-off power and the first power-recharging cut-off power.

[0015] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the method for determining the low-voltage battery recharging cut-off power as in the first aspect is implemented.

[0016] In a fourth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the method for determining the low-voltage battery recharging cut-off power level as in the first aspect is implemented.

[0017] In a fifth aspect, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the method for determining the low-voltage battery recharging cut-off power as in the first aspect.

[0018] In a sixth aspect, an embodiment of the present application provides a vehicle, the vehicle comprising at least one of the following:

[0019] A low-voltage battery charging cut-off capacity determination device as in any one of the embodiments of the second aspect;

[0020] An electronic device as in any one of the embodiments of the third aspect;

[0021] A computer storage medium as in any one of the embodiments of the fourth aspect;

[0022] A computer program product as in any embodiment of the fifth aspect.

[0023] The embodiments of the present application provide a method, device, equipment, storage medium and computer program product for determining the recharging cut-off capacity of a low-voltage battery. The cut-off capacity of the low-voltage battery in the embodiments of the present application is determined based on the minimum recharging cut-off capacity and the first recharging cut-off capacity determined by the recharging efficiency, and the recharging efficiency is the result obtained by considering the extra power consumption, so the first recharging cut-off capacity determined by the recharging efficiency can avoid excessive power consumption caused by the controller being awakened during the recharging process, so the first recharging cut-off capacity can avoid excessive extra power consumption due to the recharging process being too long, and at the same time, the minimum recharging cut-off capacity, as the minimum standard for the recharging cut-off capacity, can avoid the risk of power shortage. Therefore, based on the minimum recharging cut-off capacity and the first recharging cut-off capacity, the target recharging cut-off capacity of the low-voltage battery that is finally determined can avoid the risk of power shortage while avoiding excessive extra power consumption due to the recharging process being too long. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 It is a flowchart of a method for determining a low-voltage battery charging cut-off power provided by an embodiment of the present application;

[0026] Figure 2 It is a flowchart of a method for a first high-voltage battery to replenish power for a first low-voltage battery provided by an embodiment of the present application;

[0027] Figure 3 It is a structural schematic diagram of a low-voltage battery charging cut-off power determination device provided by an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0031] Usually, a car is equipped with a 12V low-voltage battery to power low-voltage electrical appliances. When the vehicle is parked, the battery power will slowly consume. Long-term parking will cause the battery to run out of power and the vehicle will need to be pumped to start again. For new energy vehicles, when the low-voltage battery power drops, the energy of the power battery can be used to replenish the low-voltage battery.

[0032] The existing power battery has a fixed cut-off value for charging the low-voltage battery. In this way, when charging, the charging will only stop when the amount of power obtained by charging the low-voltage battery reaches the fixed value. However, since the relevant controllers in the car are awakened at the same time during the charging process, the controllers will consume a considerable amount of power. Stopping the charging according to the fixed value will extend the charging time, causing excessive additional power consumption during the charging process.

[0033] The reason why the prior art has the above-mentioned problems is that, since the relevant controller in the vehicle is awakened during the process of the power battery recharging the low-voltage battery, the controller will consume a considerable amount of electricity, and the recharging efficiency is affected by the battery temperature and power. In the low temperature state and the power of the low-voltage battery is already at a high level, the recharging efficiency will be reduced. The reduction in recharging efficiency will inevitably extend the overall recharging time, thereby resulting in excessive additional power consumption during the recharging process.

[0034] In order to solve the problems of the prior art, the embodiments of the present application provide a method, device, equipment, storage medium and computer program product for determining the recharging cut-off power of a low-voltage battery. The cut-off power of the low-voltage battery in the embodiments of the present application is determined based on the minimum recharging cut-off power and the first recharging cut-off power determined by the recharging efficiency, and the recharging efficiency is the result obtained by considering the additional power consumption, so the first recharging cut-off power determined by the recharging efficiency can avoid excessive power consumption caused by the controller being awakened during the recharging process, so the first recharging cut-off power can avoid excessive additional power consumption due to the recharging process being too long, and at the same time, the minimum recharging cut-off power as the minimum standard for the recharging cut-off power can avoid the risk of power shortage. Therefore, based on the minimum recharging cut-off power and the first recharging cut-off power, the target recharging cut-off power of the low-voltage battery finally determined can avoid the risk of power shortage while avoiding excessive additional power consumption due to the recharging process being too long.

[0035] The following first introduces the method for determining the low-voltage battery recharging cut-off power provided in the embodiment of the present application.

[0036] Figure 1 FIG. 1 is a flow chart showing a method for determining a low-voltage battery charging cut-off power level according to an embodiment of the present application. Figure 1 As shown, the method may include the following steps: S101 to S104.

[0037] S101: Acquire a minimum charging cut-off power of a first low-voltage battery, a first energy consumed by a first high-voltage battery within a preset period of time when charging the first low-voltage battery, and a second energy obtained by charging the first low-voltage battery.

[0038] The first low-voltage battery is used to supply power to low-voltage electrical appliances, and the first high-voltage battery represents the power battery of the vehicle, which is used to provide power to the vehicle and to replenish the power of the first low-voltage battery when the power of the first low-voltage battery is too low.

[0039] The minimum recharging cut-off power indicates the minimum cut-off power of the first high-voltage battery for a single recharging of the first low-voltage battery, to ensure that after the recharging, the power of the low-voltage battery will not drop below the preset recharging start power in the next wake-up cycle, to avoid the risk of power shortage.

[0040] The first energy represents the energy consumed by the first high-voltage battery to replenish the first low-voltage battery within a preset time period; the second energy represents the energy obtained by the first low-voltage battery to replenish the battery.

[0041] In some embodiments, obtaining the minimum recharging cut-off power of the first low-voltage battery may be determined and obtained according to the maximum power reduction rate and recharging start power of the first low-voltage battery in different wake-up cycles.

[0042] In some embodiments, obtaining the first energy consumed by the first high-voltage battery during the preset period of time when the first low-voltage battery is charged can be obtained by obtaining the power consumption of the first high-voltage battery during the preset period of time. And obtaining the power consumption of the first high-voltage battery during the preset period of time can be obtained by calculating the integral of the product of the voltage and current of the first high-voltage battery at different times during the preset period of time during the preset period of time.

[0043] In some embodiments, obtaining the second energy obtained by charging the first low-voltage battery can be obtained by obtaining the power consumption of the first low-voltage battery in a preset period of time. And obtaining the power consumption of the first low-voltage battery in the preset period of time can be obtained by calculating the integral of the product of the voltage and current of the first low-voltage battery at different times in the preset period of time in the preset period of time.

[0044] S102: Determine, according to the first energy and the second energy, a power replenishment efficiency of the first high-voltage battery for the first low-voltage battery.

[0045] The charging efficiency indicates the effectiveness of the first high-voltage battery charging the first low-voltage battery. If the second amount of electricity obtained by charging the first low-voltage battery is far less than the first energy consumed by the first high-voltage battery to charge the first low-voltage battery, it indicates that the charging efficiency of the first high-voltage battery to charge the first low-voltage battery is low, and accordingly, the charging time of the first low-voltage battery will be extended, thereby increasing the additional electricity consumed during the charging process.

[0046] In some embodiments, the efficiency of the first high-voltage battery in replenishing the first low-voltage battery is determined based on the first energy and the second energy. The efficiency of the first high-voltage battery in replenishing the first low-voltage battery may be determined based on the ratio of the first energy to the second energy.

[0047] S103: Determine a first power supplement cut-off power supply corresponding to the power supplement efficiency according to the corresponding relationship between the power supplement efficiency and the power supplement cut-off power supply.

[0048] The corresponding relationship between the power replenishment efficiency and the power replenishment cut-off power is used to determine the corresponding power replenishment cut-off power according to the power replenishment efficiency.

[0049] The first charging cut-off power level indicates a charging cut-off power level determined according to a charging efficiency of the first high-voltage battery charging the first low-voltage battery.

[0050] The charging cut-off power is determined according to the charging efficiency of the first high-voltage battery in charging the first low-voltage battery. When the charging efficiency is high, the charging is continued. When the charging efficiency is low, the charging is stopped in advance. This can avoid extending the charging time and thus avoid excessive consumption of extra power.

[0051] In some embodiments, the correspondence between the charging efficiency and the charging cut-off power can be a functional relationship with a positive correlation. According to the correspondence between the charging efficiency and the charging cut-off power, the first charging cut-off power corresponding to the charging efficiency is determined by substituting the charging efficiency into the functional relationship to obtain the first charging cut-off power.

[0052] S104: Determine a target power-recharging cut-off power of the first low-voltage battery according to the minimum power-recharging cut-off power and the first power-recharging cut-off power.

[0053] The target power replenishment cut-off power represents a threshold standard that is ultimately used to control the first high-voltage battery to stop replenishing power for the first low-voltage battery.

[0054] In order to ensure that the power of a single power replenishment based on the power replenishment cut-off power can meet the power consumption demand within the wake-up cycle and avoid the risk of power shortage, this embodiment uses the minimum power replenishment cut-off power as the minimum cut-off power standard, and determines the final target power replenishment cut-off power of the low-voltage battery based on the first power replenishment cut-off power.

[0055] In some embodiments, when the first power-replenishing cut-off power is not less than the minimum power-replenishing cut-off power, the first power-replenishing cut-off power is determined as the target power-replenishing cut-off power; when the first power-replenishing cut-off power is less than the minimum power-replenishing cut-off power, the minimum power-replenishing cut-off power is determined as the target power-replenishing cut-off power.

[0056] The cut-off power of the low-voltage battery in the embodiment of the present application is determined based on the minimum power-replenishing cut-off power and the first power-replenishing cut-off power determined by the power-replenishing efficiency, and the power-replenishing efficiency is the result obtained by considering the extra power consumption, so the first power-replenishing cut-off power determined by the power-replenishing efficiency can avoid excessive power consumption caused by the controller being awakened during the power-replenishing process, so the first power-replenishing cut-off power can avoid excessive extra power consumption due to the power-replenishing process being too long, and at the same time, the minimum power-replenishing cut-off power as the minimum standard for the power-replenishing cut-off power can avoid the risk of power shortage. Therefore, based on the minimum power-replenishing cut-off power and the first power-replenishing cut-off power, the target power-replenishing cut-off power of the low-voltage battery that is finally determined can avoid the risk of power shortage while avoiding excessive extra power consumption due to the power-replenishing process being too long.

[0057] In some embodiments, before S103, the method for determining the low-voltage battery charging cut-off power may further include:

[0058] Obtaining a preset maximum charging efficiency and a minimum charging efficiency of the high-voltage battery for charging the low-voltage battery, a maximum charging cutoff power corresponding to the maximum charging efficiency, and a minimum charging cutoff power corresponding to the minimum charging efficiency;

[0059] According to the maximum power replenishment efficiency, the minimum power replenishment efficiency, the maximum power replenishment cut-off power and the minimum power replenishment cut-off power, a linear fitting is performed on the relationship between the power replenishment efficiency and the power replenishment cut-off power to obtain the corresponding relationship between the power replenishment efficiency and the power replenishment cut-off power.

[0060] The maximum charging cut-off power corresponding to the maximum charging efficiency can be determined according to the properties of the low-voltage battery. For example, if the maximum power that the low-voltage battery can charge is 95%, the maximum charging cut-off power corresponding to the maximum charging efficiency can be set to 95%.

[0061] The minimum recharging cut-off power corresponding to the minimum recharging efficiency can be determined by the extreme value of the power drop of the low-voltage battery during the wake-up cycle. The extreme value of the power drop of the low-voltage battery represents the maximum value of the power drop of the low-voltage battery in multiple wake-up cycles. For example, if the extreme value of the power drop of the low-voltage battery during the wake-up cycle is 50%, the minimum recharging cut-off power corresponding to the minimum recharging efficiency can be set to 50%.

[0062] By performing linear fitting on the relationship between the charging efficiency and the charging cut-off power according to the preset maximum charging efficiency and minimum charging efficiency of the high-voltage battery for charging the low-voltage battery, the maximum charging cut-off power corresponding to the maximum charging efficiency, and the minimum charging cut-off power corresponding to the minimum charging efficiency, a corresponding relationship between the charging efficiency and the charging cut-off power is obtained, the first charging cut-off power can be accurately determined according to the corresponding relationship between the charging efficiency and the charging cut-off power, and then the target charging cut-off power can be accurately determined according to the first charging cut-off power and the minimum charging cut-off power, so that the best time for the first high-voltage battery to stop charging the first low-voltage battery can be determined based on the target charging cut-off power.

[0063] As an example, the above-preset maximum charging efficiency and minimum charging efficiency of the high-voltage battery for charging the low-voltage battery can be 100% and 0% respectively. According to the maximum charging efficiency, the minimum charging efficiency, the maximum charging cut-off power and the minimum charging cut-off power, a linear fit is performed on the relationship between the charging efficiency and the charging cut-off power, and the corresponding relationship between the charging efficiency and the charging cut-off power can be shown in the following Table 1.

[0064] Table 1 Corresponding relationship between power replenishment efficiency and power replenishment cut-off power

[0065] Power replenishment efficiency 0％ 20％ 40％ 60％ 80％ 100％ Power supply cut-off capacity 50％ 60％ 70％ 80％ 90％ 95％

[0066] In some embodiments, obtaining the minimum charging cut-off power of the first low-voltage battery in S101 may include:

[0067] Obtaining the power of the first low-voltage battery corresponding to each wake-up cycle in a plurality of wake-up cycles and a preset replenishment start power;

[0068] Based on the multiple power levels, determining a power reduction rate of the first low-voltage battery in different wake-up cycles;

[0069] Determine a maximum rate of decrease from a plurality of rates of decrease in power;

[0070] The minimum power replenishment cut-off power is determined based on the power replenishment start power and the maximum drop rate.

[0071] The replenishment start power level represents a threshold standard for controlling the first high-voltage battery to start replenishing power to the first low-voltage battery to avoid the risk of power shortage.

[0072] Specifically, when the vehicle is parked, the controller wakes up every wake-up period T and detects the power of the first low-voltage battery. If the power is lower than the preset charging start power SOCThr1, charging begins; if the power is higher than the charging end power SOCThr2, the power of this wake-up is recorded in the storage unit.

[0073] As an example, obtaining the power of the first low-voltage battery corresponding to each wake-up cycle in multiple wake-up cycles may be recording the power SOC corresponding to the past N wake-up cycles. 1，2，3…N .

[0074] By calculating SOC 2 and SOC 1 The difference SOCDelta 2 , and calculate the ratio of the difference to the wake-up cycle T, the rate of decrease of the power of the first low-voltage battery in the second wake-up cycle can be obtained. 3 and SOC 2 The difference SOCDelta 3 , and calculate the ratio of the difference to the wake-up cycle T, the power drop rate of the first low-voltage battery in the third wake-up cycle can be obtained. N and SOC N-1 The difference SOCDelta N , and calculate the ratio of the difference to the wake-up cycle T, the power decrease rate of the first low-voltage battery in the Nth wake-up cycle can be obtained.

[0075] As an example, the above-mentioned determination of the maximum power decrease rate from multiple power decrease rates can be achieved by determining the maximum power decrease rate from the power decrease rates corresponding to the past N wake-up cycles, that is, the above-mentioned maximum decrease rate can be used to determine the minimum power replenishment cut-off power.

[0076] As an example, the minimum power replenishment cut-off power level is determined based on the power replenishment start power level and the maximum decrease rate. The method may be to determine the power decrease value corresponding to the maximum decrease rate, that is, the power decrease extreme value SOCDeltaMax within the past N wake-up cycles, and determine the minimum power replenishment cut-off power level based on the sum of the power decrease extreme value SOCDeltaMax and the preset power replenishment start power level SOCThr1.

[0077] As an example, the minimum supplementary power cut-off power SOCThr2Min is determined based on the sum of the power reduction extreme value SOCDeltaMax and the preset supplementary power start power SOCThr1, which can be shown as the following formula.

[0078] SOCThr2Min=SOCThr1+SOCDeltaMax+Offset (1)

[0079] Among them, SOCThr2Min is the minimum power supply cut-off power supply, SOCThr1 is the power supply start power supply, SOCDeltaMax is the power supply drop limit, and Offset is the fixed margin value.

[0080] By determining the minimum recharging cut-off power based on the maximum rate of decrease of power of the first low-voltage battery in different wake-up cycles, it can ensure that the power of the first low-voltage battery will not drop below the preset recharging start power in the next wake-up cycle after recharging, and can avoid the risk of power shortage caused by the first high-voltage battery recharging too little power to the first low-voltage battery, which cannot meet the power consumption required by the first low-voltage battery in the wake-up cycle.

[0081] In some embodiments, in S101, obtaining the first energy consumed by the first high-voltage battery within a preset period of time when the first low-voltage battery is recharged and the second energy obtained by the first low-voltage battery during the recharge may include:

[0082] Acquire a first voltage and a first current of the first high-voltage battery at different times within a preset period, and acquire a second voltage and a second current of the first low-voltage battery at different times within a preset period;

[0083] Integrate the product of the first voltage and the first current within a preset period of time to obtain a first energy consumed by the first high-voltage battery within the preset period of time when the first low-voltage battery is supplemented with electricity;

[0084] The product of the second voltage and the second current is integrated within a preset period of time to obtain the second energy obtained by charging the first low-voltage battery.

[0085] The preset time period may be a time period from the moment when the first high-voltage battery starts to supplement the first low-voltage battery to the current moment.

[0086] The first voltage UHVBat and the first current IHVBat of the first high-voltage battery at different times within the preset time period may be the voltage and current of the first high-voltage battery detected by the controller in different operation cycles within the preset time period.

[0087] The second voltage ULVBat and the second current ILVBat of the first low voltage battery at different times within the preset time period may be the voltage and current of the first low voltage battery detected by the controller in different operation cycles within the preset time period.

[0088] By integrating the product of the first voltage and the first current of the first high-voltage battery at different times within a preset time period within the preset time period, and integrating the product of the second voltage and the second current of the first low-voltage battery at different times within the preset time period within the preset time period, it is possible to accurately obtain the first energy consumed by the first high-voltage battery during the preset time period of replenishing the first low-voltage battery and the second energy obtained by replenishing the first low-voltage battery, thereby ensuring the accuracy of the replenishment efficiency determined based on the first energy and the second energy.

[0089] On the basis of the above embodiment, the charging efficiency Eff of the first high-voltage battery for the first low-voltage battery is determined according to the first energy and the second energy. The charging efficiency of the first high-voltage battery for the first low-voltage battery can be determined according to the ratio of the first energy to the second energy.

[0090] As an example, the efficiency of the first high-voltage battery in replenishing the first low-voltage battery according to the ratio of the first energy to the second energy can be expressed by the following formula.

[0091]

[0092] Wherein, Eff is the power replenishment efficiency, ULVBat is the second voltage, ILVBat is the second current, UHVBat is the first voltage, IHVBat is the first current, and t is the preset time period.

[0093] In some embodiments, S104 may include:

[0094] When the first power-supply cut-off power is not less than the minimum power-supply cut-off power, determining the first power-supply cut-off power as the target power-supply cut-off power;

[0095] When the first power supplement cut-off power level is less than the minimum power supplement cut-off power level, the minimum power supplement cut-off power level is determined as the target power supplement cut-off power level.

[0096] In order to ensure that the power of a single power replenishment based on the power replenishment cut-off power can meet the power consumption demand within the wake-up cycle and avoid the risk of power shortage, this embodiment uses the minimum power replenishment cut-off power as the minimum cut-off power standard, and determines the final target power replenishment cut-off power of the low-voltage battery based on the first power replenishment cut-off power.

[0097] When the first power supplement cut-off power SOCThr2Dyna is not less than the minimum power supplement cut-off power SOCThr2Min, the first power supplement cut-off power SOCThr2Dyna is determined as the target power supplement cut-off power SOCThr2; when the first power supplement cut-off power SOCThr2Dyna is less than the minimum power supplement cut-off power SOCThr2Min, the minimum power supplement cut-off power SOCThr2Min is determined as the target power supplement cut-off power SOCThr2.

[0098] By using the minimum power replenishment cut-off power as the minimum cut-off power standard, the best time to stop power replenishment can be determined based on the first power replenishment cut-off power, while still ensuring that the power consumption demand for a single power replenishment can be met during the wake-up cycle, thereby avoiding the risk of power shortage due to the first power replenishment cut-off power being too low.

[0099] As an example, the target charging cut-off power of the low-voltage battery is determined according to the minimum charging cut-off power and the first charging cut-off power, which can be expressed by the following formula.

[0100] SOCThr2=max{SOCThr2Dyna,SOCThr2Min} (3)

[0101] Among them, SOCThr2 is the target power supplement cut-off power, SOCThr2Dyna is the first power supplement cut-off power, and SOCThr2Min is the minimum power supplement cut-off power.

[0102] In some embodiments, before S101, the method for determining the low-voltage battery charging cut-off power may further include:

[0103] Acquire a power requirement and an energy requirement of a first low-voltage battery and a battery cell temperature corresponding to each wake-up cycle of the first low-voltage battery in a plurality of wake-up cycles;

[0104] determining a lowest cell temperature from a plurality of cell temperatures;

[0105] Determine a first supplementary power start power corresponding to the lowest battery cell temperature and power requirement from a mapping relationship between the battery cell temperature, power requirement and supplementary power start power;

[0106] Determine a second supplementary power start power corresponding to the minimum battery cell temperature and energy demand from a mapping relationship between the battery cell temperature, energy demand and supplementary power start power;

[0107] A target power replenishment start power is determined according to the first power replenishment start power and the second power replenishment start power, so as to control the first high voltage battery to start replenishing the first low voltage battery.

[0108] The target power replenishment start power represents a threshold standard for controlling the first high-voltage battery to start replenishing power for the first low-voltage battery.

[0109] The power requirement Preq represents the power that the first low-voltage battery needs to output per unit time. The power requirement can be set according to the low-voltage power consumption of the vehicle.

[0110] The energy requirement Ereq represents the energy that the first low-voltage battery needs to consume within a preset period of time. The energy requirement can be set according to the low-voltage power consumption of the vehicle.

[0111] Considering that the battery discharge capacity, available energy and temperature are strongly correlated, the lower the temperature, the higher the battery discharge capacity and available energy, and the value of the target power replenishment start power SOCThr1 can be associated with the temperature. To this end, this embodiment obtains the battery cell temperature corresponding to each wake-up cycle of the first low-voltage battery in multiple wake-up cycles, and determines the lowest battery cell temperature from the multiple battery cell temperatures to determine the target power replenishment start power.

[0112] On the basis of determining the minimum battery cell temperature, through the mapping relationship between the battery cell temperature, power demand and the charging start power, and the mapping relationship between the battery cell temperature, energy demand and the charging start power, the first charging start power and the second charging start power can be accurately determined, and then the target charging start power can be accurately determined according to the first charging start power and the second charging start power, so that the best start time for the first high-voltage battery to charge the first low-voltage battery can be determined based on the target charging start power.

[0113] As an example, the controller periodically wakes up and detects the first low-voltage battery cell temperature CellTemp and records it in the storage unit. CellTemp of the past N wake-up cycles can be recorded. 1，2，3…N， Take the minimum value, i.e. the lowest cell temperature CellTempMin, and record it.

[0114] As an example, the mapping relationship between the battery cell temperature, power demand and the starting power of the battery replenishment can be shown in Table 2 below.

[0115] Table 2 Mapping relationship between battery cell temperature, power demand and charging start power, unit (kW)

[0116]

[0117] For example, if the minimum cell temperature CellTempMin is -20 and the power requirement Preq is 1.4, it can be determined that the first supplementary power starting amount SOCThr1Min1 is 50%.

[0118] As an example, the mapping relationship between the battery cell temperature, energy demand and the starting power of the power replenishment can be shown in the following Table 3.

[0119] Table 3 Mapping relationship between battery cell temperature, energy demand and charging start power, unit (%)

[0120]

[0121]

[0122] For example, if the minimum cell temperature CellTempMin is -20 and the energy demand Ereq is 30, then the second supplementary power starting amount SOCThr1Min2 can be determined to be 40%.

[0123] In some embodiments, determining the target supplementary power starting power according to the first supplementary power starting power and the second supplementary power starting power may include:

[0124] When the first supplementary power starting power is not less than the second supplementary power starting power, determining the first supplementary power starting power as the target supplementary power starting power;

[0125] When the first electric supplementation start power quantity is less than the second electric supplementation start power quantity, the second electric supplementation start power quantity is determined as the target electric supplementation start power quantity.

[0126] By using the second power replenishment starting power as the minimum starting power standard, the best time to start power replenishment can be determined based on the first power replenishment starting power, while still ensuring that the power replenishment power can meet the power consumption demand within the wake-up cycle, thereby avoiding the risk of power shortage caused by too low power at the first power replenishment starting power.

[0127] As an example, the above-mentioned determination of the target electric supplement start electric supplement power according to the first electric supplement start electric supplement power and the second electric supplement start electric supplement power can be expressed by the following formula.

[0128] SOCThr1=max{SOCThr1Min1, SOCThr1Min2} (4)

[0129] Among them, SOCThr1 is the target supplementary power starting power, SOCThr1Min1 is the first supplementary power starting power, and SOCThr1Min2 is the second supplementary power starting power.

[0130] In order to better describe the solutions in the present application, some specific examples are given based on the above embodiments.

[0131] For example, a method for a first high-voltage battery to replenish power for a first low-voltage battery provided in an embodiment of the present application can be as follows: Figure 2 As shown, the method may include the following steps: S201 to S206.

[0132] S201 : Detecting a voltage UHVBat and a current IHVBat of a first high-voltage battery, and a voltage ULVBat and a current ILVBat of a first low-voltage battery.

[0133] S202: Calculate the power consumption EHVBat of the first high voltage battery and the power consumption ELVBat of the first low voltage battery in the current operation cycle t of the controller and record them:

[0134] EHVBat=UHVBat×IHVBat×t (5)

[0135] ELVBat=ULVBat×ILVBat×t (6)

[0136] S203: Accumulate the power consumption data of the past n operation cycles and calculate the power replenishment efficiency Eff:

[0137]

[0138] S204: Determine the first power supplement cut-off power SOCThr2Dyna corresponding to the power supplement efficiency Eff according to the corresponding relationship between the power supplement efficiency and the first power supplement cut-off power.

[0139] S205: Determine the target supplementary power cut-off power SOCThr2 according to the first supplementary power cut-off power SOCThr2Dyna and the minimum supplementary power cut-off power SOCThr2Min.

[0140] S206: Determine whether the power LVBatSOC of the first low-voltage battery is greater than the target charging cut-off power SOCThr2. If yes, the charging ends, if no, jump to S201.

[0141] Figure 3 is a structural diagram of a low-voltage battery charging cut-off power determination device 300 provided in an embodiment of the present application. Figure 3 As shown, the device may include an acquisition module 310 and a determination module 320 .

[0142] An acquisition module 310 is used to acquire a minimum charging cut-off power of the first low-voltage battery, a first energy consumed by the first high-voltage battery during a preset period of time when charging the first low-voltage battery, and a second energy obtained by charging the first low-voltage battery;

[0143] A determination module 320, configured to determine a power replenishment efficiency of the first high-voltage battery for replenishing power to the first low-voltage battery according to the first energy and the second energy;

[0144] The determination module 320 is further configured to determine a first power supplement cut-off power supply corresponding to the power supplement efficiency according to a corresponding relationship between the power supplement efficiency and the power supplement cut-off power supply;

[0145] The determination module 320 is further configured to determine a target power-recharging cut-off power of the first low-voltage battery according to the minimum power-recharging cut-off power and the first power-recharging cut-off power.

[0146] The cut-off power of the low-voltage battery in the embodiment of the present application is determined based on the minimum power-replenishing cut-off power and the first power-replenishing cut-off power determined by the power-replenishing efficiency, and the power-replenishing efficiency is the result obtained by considering the extra power consumption, so the first power-replenishing cut-off power determined by the power-replenishing efficiency can avoid excessive power consumption caused by the controller being awakened during the power-replenishing process, so the first power-replenishing cut-off power can avoid excessive extra power consumption due to the power-replenishing process being too long, and at the same time, the minimum power-replenishing cut-off power as the minimum standard for the power-replenishing cut-off power can avoid the risk of power shortage. Therefore, based on the minimum power-replenishing cut-off power and the first power-replenishing cut-off power, the target power-replenishing cut-off power of the low-voltage battery that is finally determined can avoid the risk of power shortage while avoiding excessive extra power consumption due to the power-replenishing process being too long.

[0147] In some embodiments, the low-voltage battery recharging cut-off power determination device 300 further includes a fitting module;

[0148] The acquisition module 310 is further used to obtain the preset maximum charging efficiency and minimum charging efficiency of the high-voltage battery for charging the low-voltage battery, the maximum charging cut-off power corresponding to the maximum charging efficiency, and the minimum charging cut-off power corresponding to the minimum charging efficiency;

[0149] The fitting module is used to perform linear fitting on the relationship between the charging efficiency and the charging cut-off power according to the maximum charging efficiency, the minimum charging efficiency, the maximum charging cut-off power and the minimum charging cut-off power, so as to obtain the corresponding relationship between the charging efficiency and the charging cut-off power.

[0150] In some embodiments, the acquisition module 310 is further used to acquire the power corresponding to each wake-up cycle of the first low-voltage battery in a plurality of wake-up cycles and a preset replenishment start power;

[0151] The determination module 320 is further configured to determine a rate of decrease of power of the first low-voltage battery in different wake-up cycles based on the multiple power levels;

[0152] The determination module 320 is further configured to determine a maximum power reduction rate from among the plurality of power reduction rates;

[0153] The determination module 320 is further configured to determine a minimum power supplement cut-off power supply based on the power supplement start power supply and the maximum drop rate.

[0154] In some embodiments, the acquisition module 310 is further used to acquire a first voltage and a first current of the first high-voltage battery at different times within a preset period, and to acquire a second voltage and a second current of the first low-voltage battery at different times within a preset period;

[0155] The determination module 320 is further configured to integrate the product of the first voltage and the first current within a preset period of time to obtain a first energy consumed by the first high-voltage battery within the preset period of time when the first low-voltage battery is supplemented with electricity;

[0156] The determination module 320 is further configured to integrate the product of the second voltage and the second current within a preset period of time to obtain a second energy obtained by charging the first low-voltage battery.

[0157] In some embodiments, the determination module 320 is further configured to determine the first supplementary power cutoff power as the target supplementary power cutoff power when the first supplementary power cutoff power is not less than the minimum supplementary power cutoff power;

[0158] The determination module 320 is further configured to determine the minimum supplementary power cutoff power as the target supplementary power cutoff power when the first supplementary power cutoff power is less than the minimum supplementary power cutoff power.

[0159] In some embodiments, the acquisition module 310 is further used to acquire the power demand and energy demand of the first low-voltage battery and the battery cell temperature corresponding to each wake-up cycle of the first low-voltage battery in multiple wake-up cycles;

[0160] The determination module 320 is further used to determine the lowest battery cell temperature from the multiple battery cell temperatures;

[0161] The determination module 320 is further configured to determine a first supplementary power start power corresponding to the minimum battery cell temperature and power requirement from a mapping relationship between the battery cell temperature, the power requirement and the supplementary power start power;

[0162] The determination module 320 is further configured to determine a second supplementary power start power corresponding to the minimum battery cell temperature and energy requirement from a mapping relationship among the battery cell temperature, energy requirement and supplementary power start power;

[0163] The determination module 320 is further configured to determine a target power replenishment start power according to the first power replenishment start power and the second power replenishment start power, so as to control the first high voltage battery to start replenishing the first low voltage battery.

[0164] In some embodiments, the determination module 320 is further configured to determine the first supplementary power starting power as the target supplementary power starting power when the first supplementary power starting power is not less than the second supplementary power starting power;

[0165] The determination module 320 is further configured to determine the second supplementary power starting power as the target supplementary power starting power when the first supplementary power starting power is less than the second supplementary power starting power.

[0166] Figure 3 The various modules in the device shown can be implemented Figure 1 Each step in the above steps can achieve the corresponding technical effect, which will not be repeated here for the sake of brevity.

[0167] Figure 4 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0168] The electronic device may include a processor 401 and a memory 402 storing computer program instructions.

[0169] Specifically, the processor 401 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0170] Memory 402 may include a large capacity memory for data or instructions. By way of example and not limitation, memory 402 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, memory 402 may include a removable or non-removable (or fixed) medium. In appropriate cases, memory 402 may be inside or outside of an integrated gateway disaster recovery device. In a specific embodiment, memory 402 is a non-volatile solid-state memory.

[0171] In certain embodiments, the memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of the present application.

[0172] The processor 401 reads and executes computer program instructions stored in the memory 402 to implement any one of the methods for determining the low-voltage battery charging cut-off power in the above embodiments.

[0173] In one example, the electronic device may further include a communication interface 403 and a bus 410. Figure 4 As shown, the processor 401, the memory 402, and the communication interface 403 are connected via a bus 410 and communicate with each other.

[0174] The communication interface 403 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0175] Bus 410 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 410 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0176] In addition, in combination with the method for determining the cut-off capacity of low-voltage battery recharge in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the methods for determining the cut-off capacity of low-voltage battery recharge in the above embodiment is implemented.

[0177] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed, implements any one of the methods for determining the low-voltage battery recharging cut-off power in the above embodiments.

[0178] In addition, the embodiment of the present application further provides a vehicle, which may include at least one of the following:

[0179] A low-voltage battery charging cut-off capacity determination device as in any one of the embodiments of the second aspect;

[0180] An electronic device as in any one of the embodiments of the third aspect;

[0181] A computer-readable storage medium as in any embodiment of the fourth aspect;

[0182] The computer program product in any one of the embodiments of the fifth aspect will not be described in detail here.

[0183] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0184] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0185] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0186] The above reference is to the flowchart and / or block diagram of the method, device, equipment, storage medium and computer program product according to the embodiment of the present application. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. This processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of the boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0187] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for determining the cut-off power of a low-voltage battery, characterized in that: include: Acquire the minimum charging cut-off power of the first low-voltage battery, the first energy consumed by the first high-voltage battery within a preset period of time when charging the first low-voltage battery, and the second energy obtained by charging the first low-voltage battery; determining, according to the first energy and the second energy, a charging efficiency of the first high-voltage battery for charging the first low-voltage battery; According to the corresponding relationship between the power supplement efficiency and the power supplement cut-off power, determining a first power supplement cut-off power corresponding to the power supplement efficiency; A target power-recharging cut-off power of the first low-voltage battery is determined according to the minimum power-recharging cut-off power and the first power-recharging cut-off power.

2. The method according to claim 1, characterized in that: Before determining the first power supplement cut-off power supply corresponding to the power supplement efficiency according to the correspondence between the power supplement efficiency and the power supplement cut-off power supply, the method further includes: Obtaining a preset maximum charging efficiency and a minimum charging efficiency of the high-voltage battery for charging the low-voltage battery, a maximum charging cutoff power corresponding to the maximum charging efficiency, and a minimum charging cutoff power corresponding to the minimum charging efficiency; According to the maximum power replenishment efficiency, the minimum power replenishment efficiency, the maximum power replenishment cut-off quantity and the minimum power replenishment cut-off quantity, a linear fitting is performed on the relationship between the power replenishment efficiency and the power replenishment cut-off quantity to obtain a corresponding relationship between the power replenishment efficiency and the power replenishment cut-off quantity.

3. The method according to claim 1, characterized in that The obtaining of the minimum charging cut-off power of the first low-voltage battery includes: Obtaining the power of the first low-voltage battery corresponding to each wake-up cycle in a plurality of wake-up cycles and a preset recharging start power; Based on the multiple power levels, determining a power reduction rate of the first low-voltage battery in different wake-up cycles; Determine a maximum rate of decrease from a plurality of the rates of decrease in power; Based on the power supplement start power and the maximum drop rate, a minimum power supplement cut-off power is determined.

4. The method according to claim 1, characterized in that: The obtaining of the first energy consumed by the first high-voltage battery within a preset period of time when the first low-voltage battery is replenished with electricity and the second energy obtained by the first low-voltage battery from the replenishment with electricity comprises: Acquire a first voltage and a first current of the first high-voltage battery at different times within the preset time period, and acquire a second voltage and a second current of the first low-voltage battery at different times within the preset time period; Integrating the product of the first voltage and the first current within the preset time period to obtain a first energy consumed by the first high-voltage battery within the preset time period when the first low-voltage battery is charged; The product of the second voltage and the second current is integrated within the preset time period to obtain the second energy obtained by charging the first low-voltage battery.

5. The method according to claim 1, characterized in that: The determining, according to the minimum power-up cut-off power supply and the first power-up cut-off power supply, a target power-up cut-off power supply of the first low-voltage battery includes: When the first power supplement cut-off power is not less than the minimum power supplement cut-off power, determining the first power supplement cut-off power as the target power supplement cut-off power; When the first power supplement cut-off power level is less than the minimum power supplement cut-off power level, the minimum power supplement cut-off power level is determined as the target power supplement cut-off power level.

6. The method according to any one of claims 1 to 5, characterized in that: Before obtaining the minimum charging cut-off power of the first low-voltage battery, the first energy consumed by the first high-voltage battery within a preset period of time for charging the first low-voltage battery, and the second energy obtained by charging the first low-voltage battery, the method further includes: Acquire a power requirement and an energy requirement of the first low-voltage battery and a battery cell temperature corresponding to each wake-up cycle of the first low-voltage battery in a plurality of wake-up cycles; determining a lowest battery cell temperature from a plurality of the battery cell temperatures; Determining a first supplementary power starting power corresponding to the minimum battery cell temperature and the power requirement from a mapping relationship between the battery cell temperature, the power requirement and the supplementary power starting power; Determine, from a mapping relationship among the battery cell temperature, the energy requirement and the supplementary power starting power corresponding to the minimum battery cell temperature and the energy requirement; A target power replenishment start power quantity is determined according to the first power replenishment start power quantity and the second power replenishment start power quantity, so as to control the first high-voltage battery to start replenishing power for the first low-voltage battery.

7. The method according to claim 6, characterized in that The determining the target supplementary power starting power according to the first supplementary power starting power and the second supplementary power starting power includes: When the first supplementary power starting power is not less than the second supplementary power starting power, determining the first supplementary power starting power as the target supplementary power starting power; When the first complementary power starting power amount is less than the second complementary power starting power amount, the second complementary power starting power amount is determined as the target complementary power starting power amount.

8. A device for determining the cut-off power of a low-voltage battery, characterized in that: The device comprises: an acquisition module, configured to acquire a minimum charging cut-off power of the first low-voltage battery, a first energy consumed by the first high-voltage battery within a preset period of time when charging the first low-voltage battery, and a second energy obtained by charging the first low-voltage battery; a determination module, configured to determine, according to the first energy and the second energy, a power replenishment efficiency of the first high-voltage battery for replenishing the first low-voltage battery; The determining module is further configured to determine a first power supplement cut-off power supply corresponding to the power supplement efficiency according to a corresponding relationship between the power supplement efficiency and the power supplement cut-off power supply; The determining module is further configured to determine a target power-recharging cut-off power of the low-voltage battery according to the minimum power-recharging cut-off power and the first power-recharging cut-off power.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the method for determining the low-voltage battery charging cut-off power according to any one of claims 1 to 7 is implemented.

10. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the method for determining the low-voltage battery charging cut-off power according to any one of claims 1 to 7.

11. A vehicle, characterized in that: Include at least one of the following: The low-voltage battery charging cut-off capacity determination device as claimed in claim 8; The computer readable storage medium of claim 9; The computer program product of claim 10.

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