Battery charging method and device, electronic equipment and storage medium

Abstract

This invention provides a battery charging method, apparatus, electronic device, and storage medium. The battery charging method includes: determining the ambient temperature at a target time step; determining a thermal management strategy threshold for the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; and performing thermal management operations for a target battery in a charging state based on the thermal management strategy threshold; wherein the thermal management operations include at least one of: activating heating, deactivating heating, activating cooling, and deactivating cooling. This invention can safely and efficiently perform HPC charging.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery charging method, apparatus, electronic device, and storage medium. Background Technology

[0002] To improve the user's high-power charging (HPC) experience, battery charging performance is gradually increasing. Under high current, the battery will generate a lot of heat, which will lead to an increase in battery temperature. To protect the charging safety of the battery and extend its life, the battery needs to be cooled. In addition, due to the decrease in electrochemical reaction rate at low temperatures, the battery charging capacity decreases as the temperature decreases. To improve the charging speed at low temperatures, the battery needs to be heated.

[0003] In related technologies, the use of a fixed threshold thermal management strategy during HPC charging is difficult to adapt to different charging environments, resulting in low charging efficiency and even safety hazards.

[0004] Therefore, how to perform HPC charging safely and efficiently is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This invention provides a battery charging method, apparatus, electronic device, and storage medium to overcome the aforementioned deficiencies in the prior art and achieve safe and efficient HPC charging.

[0006] This invention provides a method for charging a battery, comprising the following steps.

[0007] Determine the ambient temperature at the target time step; based on the ambient temperature, determine the thermal management strategy threshold for the target time step; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; based on the thermal management strategy threshold, perform thermal management operations for the target battery in a charging state; wherein the thermal management operations include at least one of the following: activating heating, deactivating heating, activating cooling, and deactivating cooling.

[0008] According to a battery charging method provided by the present invention, the step of determining the thermal management strategy threshold of the target time step based on the ambient temperature includes: determining that the ambient temperature belongs to a first ambient temperature range; and determining the thermal management strategy threshold of the target time step based on the thermal management strategy threshold corresponding to the first ambient temperature range.

[0009] According to a battery charging method provided by the present invention, when the remaining charge of the target battery is within the range of the remaining charge of the target battery, the thermal management strategy threshold corresponding to the first ambient temperature range satisfies at least one of the following conditions: a first battery heating activation threshold is higher than a second battery heating activation threshold; a first battery cooling activation threshold is higher than a second battery cooling activation threshold; a first battery heating deactivation threshold is higher than a second battery heating deactivation threshold; a first battery cooling deactivation threshold is higher than a second battery cooling deactivation threshold; wherein, the first battery heating activation threshold, the first battery heating deactivation threshold, the first battery cooling activation threshold, and the first battery cooling deactivation threshold belong to the thermal management strategy threshold corresponding to the first ambient temperature range; the second battery heating activation threshold, the second battery heating deactivation threshold, the second battery cooling activation threshold, and the second battery cooling deactivation threshold belong to the thermal management strategy threshold corresponding to the second ambient temperature range; and the temperature range of the first ambient temperature range is lower than the temperature range of the second ambient temperature range.

[0010] According to a battery charging method provided by the present invention, determining the thermal management strategy threshold of the target time step based on the thermal management strategy threshold corresponding to the first ambient temperature range includes: determining that the remaining charge of the target battery belongs to a first remaining charge range; determining the thermal management strategy threshold in a thermal management strategy matrix based on the first ambient temperature range and the first remaining charge range; wherein the elements of the thermal management strategy matrix are thermal management strategy thresholds determined based on different combinations of ambient temperature ranges and remaining charge ranges.

[0011] According to a battery charging method provided by the present invention, when the remaining charge of the target battery is in the range of 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating activation threshold is 25°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, 30° to 85°; and the second battery heating activation threshold is 20°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating activation threshold is 32°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating activation threshold is 30°. Alternatively, when the target battery's remaining charge range is 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating exit threshold is 27°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating exit threshold is 22°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating exit threshold is 34°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating exit threshold is 32°.

[0012] According to a battery charging method provided by the present invention, when the remaining charge of the target battery is in the range of 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling activation threshold is 30°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, 30° to 85°; and the second battery cooling activation threshold is 26°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling activation threshold is 42°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling activation threshold is 40°. Alternatively, when the target battery's remaining charge range is 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling threshold is 28°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling threshold is 24°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling threshold is 40°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling threshold is 38°.

[0013] According to a battery charging method provided by the present invention, the step of performing a thermal management operation for a target battery based on the thermal management strategy threshold includes: determining that the temperature of the target battery is less than a first battery heating activation threshold, and that no heating operation is performed on the target battery at the target time step; and initiating a heating operation for the target battery.

[0014] According to a battery charging method provided by the present invention, the step of performing a thermal management operation for a target battery based on the thermal management strategy threshold includes: determining that the temperature of the target battery is greater than a first battery cooling activation threshold, and that no cooling operation is performed on the target battery at the target time step; and initiating a cooling operation for the target battery.

[0015] According to a battery charging method provided by the present invention, the step of performing a thermal management operation for a target battery based on the thermal management strategy threshold includes: determining that the temperature of the target battery is greater than a first battery heating exit threshold, and performing a heating operation for the target battery at a target time step; and stopping the heating operation for the target battery.

[0016] According to a battery charging method provided by the present invention, the step of performing a thermal management operation for a target battery based on the thermal management strategy threshold includes: determining that the temperature of the target battery is lower than a first battery cooling exit threshold, and performing a cooling operation for the target battery at a target time step; and stopping the cooling operation for the target battery.

[0017] The present invention also provides a battery charging device, comprising: A first determining module is used to determine the ambient temperature of the target time step; a second determining module is used to determine the thermal management strategy threshold of the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; an execution module is used to execute thermal management operations for the target battery in a charging state based on the thermal management strategy threshold; wherein the thermal management operations include at least one of the following: activating heating, deactivating heating, activating cooling, and deactivating cooling.

[0018] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a charging method for a battery as described above.

[0019] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a charging method for a battery as described above.

[0020] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements a charging method for a battery as described above.

[0021] The battery charging method, apparatus, electronic device, and storage medium provided by this invention dynamically adjust the thermal management strategy threshold according to the real-time ambient temperature during battery charging, thereby enabling more precise control of battery heating and cooling operations. This effectively solves the problem of poor adaptability of traditional fixed threshold strategies under different ambient temperatures, avoiding delayed heating exit in low-temperature environments or delayed cooling in high-temperature environments, thus improving battery charging efficiency, ensuring the safety of the charging process, and extending battery life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic flowchart of the battery charging method provided by the present invention.

[0024] Figure 2 This is a flowchart illustrating the method provided by the present invention for determining the thermal management strategy threshold of a target time step based on the thermal management strategy threshold corresponding to a first ambient temperature range.

[0025] Figure 3 This is a schematic diagram of the structure of the battery charging device provided by the present invention.

[0026] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] The following is combined Figures 1 to 2 A method for charging the battery according to the present invention is described.

[0029] Figure 1This is a schematic flowchart of the battery charging method provided by the present invention. Figure 1 As shown, the method includes the following: Step 101: Determine the ambient temperature at the target time step.

[0030] Ambient temperature refers to the temperature of the external environment in which the target battery is located. This temperature is an important factor affecting the battery's thermal state, and its value directly affects the battery's charge-discharge performance and safety.

[0031] The target battery is a battery currently undergoing a charging process. For example, the target battery is a battery installed in a new energy vehicle that is currently being charged. This invention provides thermal management for the charging process of the target battery to ensure that it operates within a suitable temperature range.

[0032] The target time step refers to a selected discrete point in time or a specific time period during battery charging. Within this time step, the ambient temperature is determined, the thermal management strategy threshold is calculated, and the corresponding thermal management operations are executed.

[0033] In practice, ambient temperature can be obtained in real time by deploying temperature sensors outside the battery system or near the charging station. For example, devices such as thermistors, thermocouples, or infrared temperature sensors can be used to acquire ambient temperature data.

[0034] Step 102: Determine the thermal management strategy threshold for the target time step based on the ambient temperature.

[0035] The thermal management strategy threshold is a temperature limit used to trigger or stop battery thermal management operations. The thermal management strategy threshold may include at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold.

[0036] When the temperature of the target battery is below the battery heating activation threshold, a heating operation needs to be initiated to raise the battery temperature.

[0037] When the temperature of the target battery exceeds the battery heating exit threshold, the heating operation needs to be stopped.

[0038] When the temperature of the target battery is higher than the battery cooling activation threshold, a cooling operation needs to be initiated to reduce the battery temperature.

[0039] When the temperature of the target battery is below the battery cooling exit threshold, the cooling operation needs to be stopped.

[0040] In practical implementation, the thermal management strategy threshold for the target time step can be determined in various ways based on the ambient temperature, without being limited by the description in this specification. For example, a mapping table between ambient temperature and thermal management strategy thresholds can be established in advance. After obtaining the current ambient temperature, the set of thermal management strategy thresholds corresponding to the current ambient temperature is looked up in the mapping table. The set of thermal management strategy thresholds may include at least one of the following: battery heating activation threshold, battery heating deactivation threshold, battery cooling activation threshold, and battery cooling deactivation threshold.

[0041] For example, when the ambient temperature is high, a relatively low battery cooling activation threshold can be set to prevent the battery from overheating.

[0042] In some embodiments, the ambient temperature is determined to belong to a first ambient temperature range; the thermal management strategy threshold for the target time step is determined based on the thermal management strategy threshold corresponding to the first ambient temperature range.

[0043] In practice, the ambient temperature can be pre-divided into multiple temperature ranges. Each ambient temperature range corresponds to a temperature spectrum, and the ranges do not overlap.

[0044] In the embodiments provided by this invention, by dividing the ambient temperature into intervals, and determining that the ambient temperature belongs to a first ambient temperature interval, the corresponding thermal management strategy threshold for that first ambient temperature interval is then matched. This balances control stability (avoiding frequent threshold jumps) with calibration convenience (using finite parameters instead of continuous curves).

[0045] The first ambient temperature range and the second ambient temperature range are two different ambient temperature ranges among multiple ambient temperature ranges. The temperature range of the first ambient temperature range is lower than the temperature range of the second ambient temperature range.

[0046] When the remaining charge of the target battery is within the range of the remaining charge of the target battery, the thermal management strategy threshold corresponding to the first ambient temperature range satisfies at least one of the following conditions: the first battery heating activation threshold is higher than the second battery heating activation threshold; the first battery cooling activation threshold is higher than the second battery cooling activation threshold; the first battery heating deactivation threshold is higher than the second battery heating deactivation threshold; the first battery cooling deactivation threshold is higher than the second battery cooling deactivation threshold.

[0047] The first battery heating activation threshold, the first battery heating deactivation threshold, the first battery cooling activation threshold, and the first battery cooling deactivation threshold are thermal management strategy thresholds corresponding to the first ambient temperature range.

[0048] The second battery heating activation threshold, the second battery heating deactivation threshold, the second battery cooling activation threshold, and the second battery cooling deactivation threshold are thermal management strategy thresholds corresponding to the second ambient temperature range.

[0049] The remaining charge (SOC) of a battery is a key parameter affecting its internal impedance, heat generation rate, and temperature sensitivity. For example, in the low charge range, the battery requires more heating to improve its charge acceptance, while in the high charge range, more stringent cooling may be needed to prevent overheating. Therefore, this invention uses the battery's remaining charge as one of the criteria for setting the threshold for its thermal management strategy.

[0050] In the embodiments provided by the present invention, the heating / cooling threshold is set higher in low-temperature environments, which can make full use of the natural heat dissipation capacity of low temperatures and reduce unnecessary energy consumption, while ensuring that the battery is heated to the appropriate charging temperature in time. This ensures safety while taking into account charging efficiency, and realizes safe and efficient operation of HPC charging.

[0051] For a detailed description of the first ambient temperature range, the second ambient temperature range, the first battery heating activation threshold, the first battery heating deactivation threshold, the first battery cooling activation threshold, the first battery cooling deactivation threshold, the second battery heating activation threshold, the second battery heating deactivation threshold, the second battery cooling activation threshold, and the second battery cooling deactivation threshold, please refer to the relevant content in step 202, which will not be repeated here.

[0052] Step 103: Perform thermal management operations for the target battery that is in the charging state according to the thermal management strategy threshold.

[0053] Thermal management operations refer to measures taken to maintain a target battery within a suitable temperature range. These operations may include at least one of turning on heating, turning off heating, turning on cooling, and turning off cooling to adjust the battery's real-time temperature state.

[0054] In some embodiments, it is determined that the temperature of the target battery is less than a first battery heating activation threshold, and no heating operation is performed on the target battery at the target time step; then a heating operation is initiated for the target battery.

[0055] In the embodiments provided by the present invention, heating is only initiated when the battery temperature is below the heating activation threshold and heating is not currently being performed, thus avoiding repeated triggering of the heating operation and ensuring that heating only intervenes when truly needed. This not only improves the battery temperature in a timely manner to ensure low-temperature charging efficiency but also prevents unnecessary energy waste, thereby achieving safe and efficient operation of HPC charging.

[0056] In some embodiments, it is determined that the temperature of the target battery is greater than a first battery cooling activation threshold, and no cooling operation is performed on the target battery at the target time step; then a cooling operation is initiated for the target battery.

[0057] In the embodiments provided by the present invention, cooling is only initiated when the battery temperature is higher than the cooling activation threshold and cooling is not currently being performed, thus avoiding repeated triggering of the cooling operation and ensuring that cooling only intervenes when truly needed. This not only reduces the battery temperature in a timely manner to ensure charging safety but also prevents unnecessary energy waste, thereby achieving safe and efficient operation of HPC charging.

[0058] In some embodiments, it is determined that the temperature of the target battery is greater than a first battery heating exit threshold, and a heating operation is performed on the target battery at a target time step; the heating operation on the target battery is then stopped.

[0059] In the embodiments provided by the present invention, heating is stopped only when the battery temperature is higher than the heating exit threshold and heating is currently being performed, thus avoiding premature termination of the heating operation and ensuring that the battery is fully heated to a suitable charging temperature before heating is stopped. This improves the low-temperature charging efficiency while preventing the charging performance from deteriorating due to premature heating, thereby achieving safe and efficient operation of HPC charging.

[0060] In some embodiments, it is determined that the temperature of the target battery is below a first battery cooling exit threshold, and a cooling operation is performed on the target battery at a target time step; the cooling operation on the target battery is then stopped.

[0061] In the embodiments provided by the present invention, cooling is stopped only when the battery temperature is below the cooling exit threshold and cooling is currently being performed, thus avoiding premature termination of the cooling operation and ensuring that the battery is cooled to a safe temperature after sufficient heat dissipation before exiting the cooling process.

[0062] Figure 2 This is a flowchart illustrating the method provided by the present invention for determining the thermal management strategy threshold of a target time step for a battery based on the thermal management strategy threshold corresponding to a first ambient temperature range. Figure 2 As shown, the method includes the following: Step 201: Determine that the remaining charge of the target battery belongs to the remaining charge range of the first battery.

[0063] Step 202: Determine the thermal management strategy threshold in the thermal management strategy matrix based on the first ambient temperature range and the first battery remaining charge range.

[0064] The elements of the thermal management strategy matrix are thermal management strategy thresholds determined based on different combinations of ambient temperature ranges and battery remaining charge ranges.

[0065] Each battery heating activation threshold in the thermal management strategy matrix is ​​used to ensure optimal charging performance and battery protection under specific combinations of ambient temperature and battery capacity.

[0066] In practical implementation, extensive experimental testing and data calibration can be conducted to analyze the charging performance and thermal behavior of the battery under various ambient temperatures and remaining battery charge conditions, thereby determining the optimal thermal management strategy threshold for each combination. This experimental data, after processing, is then incorporated into the thermal management strategy matrix.

[0067] The thermal management strategy matrix is ​​shown in Tables 1, 2, 3 and 4 below.

[0068] Table 1 shows the values ​​of the battery heating activation threshold during HPC charging with a maximum current of 400 amps or more, as a function of ambient temperature and the remaining charge of the battery.

[0069] Table 1

[0070] As shown in Table 1, when the remaining charge of the target battery is between 0% and 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating activation threshold is 25°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery heating activation threshold is 20°.

[0071] This first ambient temperature range represents relatively cold or extremely cold external environmental conditions. In low-temperature environments, the electrochemical activity of the battery decreases significantly, charging efficiency declines, and irreversible damage may even occur. Therefore, in such environments, more aggressive heating strategies are needed to bring the battery to a suitable charging temperature.

[0072] The first battery heating activation threshold is 25°C. This threshold is used to determine whether battery heating should be activated when the ambient temperature is low or extremely cold and the battery's remaining charge is in the low-charge range of 0% to 30%. Setting it to 25°C ensures that the battery can be heated to a relatively high and suitable charging temperature in a timely manner under cold conditions, thereby effectively avoiding the negative impact of low temperature on charging performance and accelerating the charging process.

[0073] This second ambient temperature range encompasses a variety of external environmental conditions, from cool to hot. Compared to the first ambient temperature range, these temperatures typically have a smaller impact on battery charging performance. Under these conditions, the battery's self-heating effect may be more pronounced, and overheating should be avoided.

[0074] The second battery heating activation threshold is 20°C. This threshold is used to determine whether battery heating operation needs to be initiated when the ambient temperature is within a second ambient temperature range (i.e., a relatively high or normal temperature environment) and the battery's remaining charge is in the low charge range of 0% to 30%. It is set at 20°C, lower than the first battery heating activation threshold of 25°C, because in these environments, the natural heat dissipation capacity of the environment is reduced, and the battery is more prone to heating. However, to maintain optimal charging performance, heating is still necessary when needed to compensate for any potential temperature deficiencies and ensure that the battery is charged within a suitable temperature range.

[0075] As shown in Table 1, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating activation threshold is 32°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating activation threshold is 30°.

[0076] During battery charging, a high remaining charge range (such as 60% to 80% or 80% to 100%) usually means that the internal ion migration and electrochemical reactions of the battery have reached a high degree of saturation. At this time, the battery may be more sensitive to temperature changes, and excessively high temperatures may accelerate battery aging or cause safety risks.

[0077] When the battery is in a high-charge state and in a low-temperature environment, the heating activation threshold is set to 32°C. This is intended to ensure that the battery reaches a relatively high temperature during charging before heating is activated, thereby avoiding premature or unnecessary heating when the ambient temperature is low, making full use of the environment's natural heat dissipation capacity, and reducing heating energy consumption.

[0078] When the battery is in a high-charge state and in a high-temperature environment, the heating activation threshold is set to 30°C to allow the battery to initiate heating at slightly lower temperatures. This is because in these environments, the natural heat dissipation capacity of the environment is reduced, and the battery is more likely to heat up. However, to maintain optimal charging performance, heating is still necessary when needed to compensate for any potential temperature deficiencies and ensure that the battery is charged within a suitable temperature range.

[0079] Table 2 shows the battery cooling activation threshold values ​​as a function of ambient temperature and battery remaining charge in HPC charging with a maximum current of 400 amps or more.

[0080] Table 2

[0081] As shown in Table 2, when the target battery has a remaining charge of 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling activation threshold is 30°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling activation threshold is 26°.

[0082] When the battery is in a low charge state and in a low temperature environment, setting the battery cooling activation threshold to 30° can utilize the natural heat dissipation capacity of the low temperature environment to delay or reduce the intervention of active cooling, thereby reducing energy consumption.

[0083] When the battery is in a low charge state and in a high temperature environment, setting the battery cooling activation threshold to 26° can ensure that cooling can be activated in time when the ambient temperature is high, preventing the battery from overheating and ensuring charging safety and battery life.

[0084] As shown in Table 2, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling activation threshold is 42°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling activation threshold is 40°.

[0085] When the battery is in a high charge state and in a low temperature environment, setting the battery cooling activation threshold to 42° can utilize the natural heat dissipation capacity of the low temperature environment to delay or reduce the intervention of active cooling, thereby reducing energy consumption.

[0086] When the battery is in a high state of charge and in a high-temperature environment, setting the battery cooling activation threshold to 40°C can ensure that cooling can be activated in time when the ambient temperature is high, preventing the battery from overheating and ensuring charging safety and battery life.

[0087] Table 3 shows the values ​​of the battery heating exit threshold during HPC charging with a maximum current of 400 amps or more, as a function of ambient temperature and the remaining charge of the battery.

[0088] Table 3

[0089] As shown in Table 3, when the remaining charge of the target battery is between 0% and 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating exit threshold is 27°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery heating exit threshold is 22°.

[0090] When the battery is in a low charge state and in a low-temperature environment, setting the battery heating exit threshold to 27°C still allows for a significant temperature difference between the battery and the environment, enabling natural heat dissipation and reducing the risk of battery overheating. Therefore, the first battery heating exit threshold is set at 27°C, which is higher than the second battery heating exit threshold of 22°C.

[0091] As shown in Table 3, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating exit threshold is 34°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery heating exit threshold is 32°.

[0092] When the battery is in a high-charge state and in a low-temperature environment, a higher first battery heating exit threshold of 34°C is used. This allows the battery to be heated to closer to its optimal charging temperature in a low-temperature environment, thereby improving the charging efficiency and charging speed of the battery in a high-charge state. At the same time, the natural heat dissipation capacity of the low-temperature environment is utilized to effectively avoid overheating. When the ambient temperature is relatively high, a lower second battery heating exit threshold of 32°C is used, which can stop the heating operation earlier and prevent the battery from overheating due to continuous heating in environments with poor heat dissipation conditions. This ensures the safety and lifespan of the battery during the charging process with high remaining charge.

[0093] Table 4 shows the battery cooling exit threshold values ​​as a function of ambient temperature and battery remaining charge in HPC charging with a maximum current of 400 amps or more.

[0094] Table 4

[0095] As shown in Table 4, when the remaining charge of the target battery is between 0% and 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling threshold is 28°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery cooling threshold is 24°.

[0096] When the battery is in a low-charge state and in a low-temperature environment, the first battery cooling exit threshold is set to a relatively high 28°C. This allows the battery to stop active cooling when it reaches 28°C, thus fully utilizing the natural heat dissipation capacity of the low-temperature environment, avoiding unnecessary continuous cooling operations, and reducing the energy consumption of the thermal management system. Simultaneously, due to the low ambient temperature, even if active cooling stops, the battery temperature will not rise rapidly; instead, it can continue to dissipate heat through natural convection or conduction, helping to maintain the battery temperature within a suitable charging range and avoiding the impact of overcooling on charging efficiency. In relatively high or normal temperature environments, the second battery cooling exit threshold is set to a relatively low 24°C. This is because in these environments, the natural heat dissipation capacity is limited, requiring cooling to stop earlier to ensure that the battery temperature does not rise too quickly due to ambient heat, thereby effectively preventing battery overheating and ensuring charging safety.

[0097] As shown in Table 4, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling threshold is 40°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery cooling threshold is 38°.

[0098] When the battery is in a high-charge state and in a low-temperature environment, setting a higher cooling exit threshold of 40°C can fully utilize the natural heat dissipation capacity of the low-temperature environment, avoiding unnecessary continuous cooling operations and reducing the energy consumption of the thermal management system. In the second ambient temperature range, the natural heat dissipation capacity of the environment is relatively weak, or the ambient temperature itself is high. Therefore, the thermal management strategy needs to be adjusted accordingly to adapt to different heat dissipation conditions and battery heating. The second battery cooling exit threshold is 38°C, which is lower than the first battery cooling exit threshold. This threshold is set lower to ensure that the battery can dissipate heat sufficiently during charging, avoiding a re-increase in battery temperature due to premature cooling cessation, especially under conditions of high charge and high heat generation.

[0099] In the embodiments provided by the present invention, the battery heating activation threshold provided by the thermal management strategy matrix can achieve the following technical effects: At 25°C, the remaining charge of the battery is in the range of 20% to 80%. The fast charging time that related technologies can achieve is 10 minutes and 9 seconds, while the fast charging time that this invention can achieve is 9 minutes and 39 seconds. Compared with related technologies, the fast charging time of this invention is improved by more than 30 seconds.

[0100] At 25°C, the remaining charge of the battery is in the range of 20% to 95%. The fast charging time that related technologies can achieve is 15 minutes and 36 seconds, while the fast charging time that this invention can achieve is 14 minutes and 24 seconds. Compared with related technologies, the fast charging time of this invention is improved by more than 1 minute and 12 seconds.

[0101] At 0℃, the remaining charge of the battery is in the range of 20 / 40~95%, and compared with related technologies, the invention improves the fast charging time by 1 minute.

[0102] At 0°C, the remaining charge of the battery is in the range of 40% to 95%. The highest charging power of related technologies is 90 kW, while the present invention can reach 110 kW. When the battery has 95% remaining charge, the charging power is greater than 100 kW.

[0103] When the battery has 10% remaining charge at 0°C, the embodiment provided by the invention shows that the battery temperature is less than 45°C, enabling the battery to dissipate heat naturally by utilizing the low ambient temperature without activating cooling in low-temperature fast charging scenarios.

[0104] The charging device for the battery provided by the present invention will be described below. The charging device for the battery described below can be referred to in correspondence with the charging method for the battery described above.

[0105] Figure 3 This is a schematic diagram of the battery charging device provided by the present invention. Figure 3 As shown, the battery charging device 300 includes the following modules.

[0106] The first determining module 310 is used to determine the ambient temperature at the target time step.

[0107] The second determining module 320 is used to determine the thermal management strategy threshold of the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold.

[0108] The execution module 330 is configured to perform thermal management operations for a target battery in a charging state according to the thermal management strategy threshold; wherein the thermal management operations include at least one of the following: turning on heating, turning off heating, turning on cooling, and turning off cooling.

[0109] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4As shown, the electronic device may include: a processor 410, a communications interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communications interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 can call logical instructions in the memory 430 to execute a battery charging method, which includes: determining the ambient temperature at a target time step; determining a thermal management strategy threshold for the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; and performing thermal management operations for a target battery in a charging state based on the thermal management strategy threshold; wherein the thermal management operations include at least one of: activating heating, deactivating heating, activating cooling, and deactivating cooling.

[0110] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0111] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the battery charging method provided by the above methods. The method includes: determining the ambient temperature at a target time step; determining a thermal management strategy threshold for the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; and performing a thermal management operation for a target battery in a charging state based on the thermal management strategy threshold; wherein the thermal management operation includes at least one of the following: activating heating, deactivating heating, activating cooling, and deactivating cooling.

[0112] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a battery charging method provided by the methods described above. The method includes: determining an ambient temperature at a target time step; determining a thermal management strategy threshold for the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; and performing a thermal management operation for a target battery in a charging state based on the thermal management strategy threshold; wherein the thermal management operation includes at least one of: activating heating, deactivating heating, activating cooling, and deactivating cooling.

[0113] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0114] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for charging a battery, characterized in that, include: Determine the ambient temperature at the target time step; Based on the ambient temperature, a thermal management strategy threshold for the target time step is determined; wherein, the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold; According to the thermal management strategy threshold, perform thermal management operations for the target battery in the charging state; wherein the thermal management operations include at least one of the following: turn on heating, turn off heating, turn on cooling, and turn off cooling.

2. The battery charging method according to claim 1, characterized in that, Determining the thermal management strategy threshold for the target time step based on the ambient temperature includes: The ambient temperature is determined to belong to the first ambient temperature range; The thermal management strategy threshold for the target time step is determined based on the thermal management strategy threshold corresponding to the first ambient temperature range.

3. The battery charging method according to claim 2, characterized in that, When the remaining charge of the target battery is within the target battery remaining charge range, the thermal management strategy threshold corresponding to the first ambient temperature range satisfies at least one of the following conditions: The heating activation threshold of the first battery is higher than that of the second battery. The cooling activation threshold of the first battery is higher than that of the second battery. The heating exit threshold of the first battery is higher than that of the second battery. The cooling exit threshold for the first battery is higher than the cooling exit threshold for the second battery. Among them, the first battery heating activation threshold, the first battery heating deactivation threshold, the first battery cooling activation threshold, and the first battery cooling deactivation threshold belong to the thermal management strategy thresholds corresponding to the first ambient temperature range. The second battery heating activation threshold, the second battery heating deactivation threshold, the second battery cooling activation threshold, and the second battery cooling deactivation threshold belong to the thermal management strategy thresholds corresponding to the second ambient temperature range. The temperature range of the first ambient temperature range is lower than the temperature range of the second ambient temperature range.

4. The battery charging method according to claim 3, characterized in that, The step of determining the thermal management strategy threshold for the target time step based on the thermal management strategy threshold corresponding to the first ambient temperature range includes: The remaining charge of the target battery is determined to belong to the remaining charge range of the first battery. Based on the first ambient temperature range and the first battery remaining charge range, the thermal management strategy threshold is determined in the thermal management strategy matrix; wherein, the elements of the thermal management strategy matrix are thermal management strategy thresholds determined based on different combinations of ambient temperature ranges and battery remaining charge ranges.

5. The battery charging method according to claim 3 or 4, characterized in that, When the remaining charge of the target battery is in the range of 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating activation threshold is 25°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery heating activation threshold is 20°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating activation threshold is 32°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating activation threshold is 30°. Alternatively, when the target battery's remaining charge range is 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating exit threshold is 27°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating exit threshold is 22°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery heating exit threshold is 34°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery heating exit threshold is 32°.

6. The battery charging method according to claim 3 or 4, characterized in that, When the remaining charge of the target battery is in the range of 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling activation threshold is 30°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; the second battery cooling activation threshold is 26°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling activation threshold is 42°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling activation threshold is 40°. Alternatively, when the target battery's remaining charge range is 0% to 30%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling threshold is 28°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling threshold is 24°. Alternatively, when the remaining charge of the target battery is in the range of 60% to 80% or 80% to 100%, the first ambient temperature range is 0° to 10° or -40° to 0°, and the first battery cooling threshold is 40°; the second ambient temperature range is one of the following: 10° to 20°, 20° to 30°, or 30° to 85°; and the second battery cooling threshold is 38°.

7. The method for charging a battery according to any one of claims 3 to 6, characterized in that, The step of performing thermal management operations for the target battery based on the thermal management strategy threshold includes: It is determined that the temperature of the target battery is less than the heating activation threshold of the first battery, and no heating operation is performed on the target battery at the target time step; Initiate the heating operation for the target battery.

8. The method for charging a battery according to any one of claims 3 to 6, characterized in that, The step of performing thermal management operations for the target battery based on the thermal management strategy threshold includes: It is determined that the temperature of the target battery is greater than the first battery cooling activation threshold, and no cooling operation is performed on the target battery at the target time step; Initiate a cooling operation for the target battery.

9. The method for charging a battery according to any one of claims 3 to 6, characterized in that, The step of performing thermal management operations for the target battery based on the thermal management strategy threshold includes: The temperature of the target battery is determined to be greater than the heating exit threshold of the first battery, and a heating operation is performed on the target battery at the target time step; Stop the heating operation on the target battery.

10. The method for charging a battery according to any one of claims 3 to 6, characterized in that, The step of performing thermal management operations for the target battery based on the thermal management strategy threshold includes: Determine that the temperature of the target battery is lower than the first battery cooling exit threshold, and perform a cooling operation on the target battery at the target time step; Stop the cooling operation for the target battery.

11. A battery charging device, characterized in that, include: The first determining module is used to determine the ambient temperature at the target time step; The second determining module is used to determine the thermal management strategy threshold for the target time step based on the ambient temperature; wherein the thermal management strategy threshold includes at least one of a battery heating activation threshold, a battery heating deactivation threshold, a battery cooling activation threshold, and a battery cooling deactivation threshold. An execution module is configured to perform thermal management operations for a target battery in a charging state according to the thermal management strategy threshold; wherein the thermal management operations include at least one of the following: turning on heating, turning off heating, turning on cooling, and turning off cooling.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the battery charging method as described in any one of claims 1 to 10.

13. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the charging method for the battery as described in any one of claims 1 to 10.

14. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the charging method for the battery as described in any one of claims 1 to 10.

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