A battery charging method and device, vehicle and medium

Abstract

The application provides a battery charging method and device, a vehicle and a medium. The method is applied to a charging system and includes the following steps: determining a target battery state interval according to a preset basic rate table, wherein the target battery state interval is obtained by splitting a basic battery state interval in the basic rate table; determining target charging rate information according to the target battery state interval; constructing a target rate table according to the target battery state interval and the target charging rate information; collecting actual battery state information of a battery; determining actual charging rate information in the target rate table according to the actual battery state information; and charging the battery by using the actual charging rate information. According to the target rate table, the charging rate is determined, and then the battery is charged, so that the charging process is smooth and efficient, and the charging experience of a user is improved. Meanwhile, the heat amount in the charging process can be better controlled, the service life of the battery is prolonged, and the safety and stability of the charging are improved.

Description

Technical Field

[0001] This application relates to the field of battery charging, and in particular to a battery charging method, apparatus, vehicle, and medium. Background Technology

[0002] With the rapid development of new energy vehicles, consumers have placed higher demands on the fast charging experience. The primary concern is reducing charging time; users expect to complete charging in a shorter period to improve convenience. Simultaneously, the change in charging current needs to be more natural and smooth to avoid abrupt changes that could adversely affect the battery and charging system.

[0003] However, because the battery state and charging rate are not perfectly matched, the charging rate may fluctuate significantly as the battery temperature gradually increases during charging. This mismatch can cause a noticeable "U"-shaped gap in the charging curve at a certain stage, where the charging rate drops sharply for a short period and then quickly recovers. This phenomenon not only affects battery life and safety but also causes significant pauses or speed fluctuations in the charging process, reducing the user's charging experience. Summary of the Invention

[0004] In view of the above problems, embodiments of this application propose a battery charging method, apparatus, vehicle, and medium.

[0005] In a first aspect of this application, a battery charging method is provided, applied to a charging system, the method comprising: The target battery state range is determined according to a preset base rate table; wherein, the target battery state range is obtained by splitting the base battery state range in the base rate table. Determine the target charging rate information based on the target battery state range; Construct a target rate table based on the target battery state range and the target charging rate information; Collect the actual battery state information of the battery, and determine the actual charging rate information in the target rate table based on the actual battery state information; The battery is charged using the actual charging rate information.

[0006] Optionally, the target battery state range includes a target voltage range, a target temperature range, and a target charge range, and the base battery state range includes a base voltage range, a base temperature range, and a base charge range; the target voltage range is obtained by dividing the base voltage range according to a preset voltage scale value; the target temperature range is obtained by dividing the base temperature range according to a preset temperature scale value; and the target charge range is obtained by dividing the base charge range according to a preset charge scale value.

[0007] Optionally, determining the target charging rate information based on the target battery state range includes: The target charging rate information is determined based on the target voltage range, the target temperature range, and the target charge range.

[0008] Optionally, the basic rate table further includes a basic end-point battery capacity range and basic end-point charging rate information, and the target rate table further includes a target end-point battery capacity range and target end-point charging rate information; the basic end-point battery capacity range is the basic battery capacity range corresponding to a preset end-point battery capacity threshold in the basic rate table; the basic end-point charging rate information is the basic charging rate information corresponding to the basic end-point battery capacity range in the basic rate table; the target end-point battery capacity range is the target battery capacity range corresponding to the preset end-point battery capacity threshold in the target rate table; the target end-point charging rate information is the target charging rate information corresponding to the target end-point battery capacity range in the target rate table; the target end-point charging rate information is greater than the basic end-point charging rate information; The method further includes: If the battery's charge level is greater than or equal to the charging terminal charge level threshold, then the battery is charged using the target terminal charging rate information.

[0009] Optionally, the actual battery status information includes actual voltage information, actual temperature information, and actual charge information. The process of collecting the actual battery status information and determining the actual charging rate information in the target rate table based on the actual battery status information includes: Collect the battery's actual voltage information, actual temperature information, and actual charge information; The actual voltage information is taken as the target voltage range corresponding to the target multiplier table; The actual temperature range is defined as the target temperature range corresponding to the actual temperature information in the target magnification table. The target power range corresponding to the actual power information in the target multiplier table is taken as the actual power range. The target charging rate information corresponding to the actual voltage range, the actual temperature range, and the actual power range in the target rate table is used as the actual charging rate information.

[0010] Optionally, the actual voltage information includes actual voltage upper limit information and actual voltage lower limit information, and the step of using the target voltage range corresponding to the actual voltage information in the target multiplier table as the actual voltage range includes: The target voltage range corresponding to the actual voltage upper limit information in the target multiplier table shall be used as the actual voltage upper limit range. The target voltage range corresponding to the actual voltage lower limit information in the target multiplier table is taken as the actual voltage lower limit range; The upper limit range of the actual voltage and the lower limit range of the actual voltage are defined as the actual voltage range.

[0011] Optionally, the actual temperature information includes upper limit information and lower limit information of the actual temperature, and the step of using the target temperature range corresponding to the actual temperature information in the target magnification table as the actual temperature range includes: The target temperature range corresponding to the actual temperature upper limit information in the target magnification table shall be used as the actual temperature upper limit range. The target temperature range corresponding to the actual temperature lower limit information in the target magnification table is taken as the actual temperature lower limit range; The upper limit range of the actual temperature and the lower limit range of the actual temperature are defined as the actual temperature range.

[0012] Optionally, the step of using the target charging rate information corresponding to the actual voltage range, the actual temperature range, and the actual charge range in the target charging rate table as the actual charging rate information includes: The target charging rate information corresponding to the actual voltage upper limit range, the actual temperature upper limit range, and the actual power range in the target rate table is used as the first charging rate information; The target charging rate information corresponding to the actual voltage upper limit range, the actual temperature lower limit range, and the actual power range in the target rate table is used as the second charging rate information; The target charging rate information corresponding to the actual voltage lower limit range, the actual temperature upper limit range, and the actual power range in the target rate table is used as the third charging rate information; The target charging rate information corresponding to the actual voltage lower limit range, the actual temperature lower limit range, and the actual power range in the target rate table is used as the fourth charging rate information; The actual charging rate information is selected from the first charging rate information, the second charging rate information, the third charging rate information, and the fourth charging rate information.

[0013] Optionally, the charging system includes a thermal management component, and the method further includes: If the actual power information is less than the preset thermal management pause power threshold, and the actual voltage upper limit information is less than the preset thermal management pause voltage threshold, then the thermal management component is controlled to perform thermal management on the battery. If the actual power information is greater than or equal to the preset thermal management pause power threshold, or the actual voltage upper limit information is greater than or equal to the preset thermal management pause voltage threshold, then the thermal management component is controlled to pause thermal management of the battery.

[0014] Optionally, the method further includes: If the actual power information is greater than or equal to a preset charging end power threshold, the thermal management component is controlled to re-perform thermal management on the battery; wherein the charging end power threshold is greater than the thermal management pause power threshold.

[0015] In a second aspect of this application, a battery charging device is also provided for use in a charging system, the device comprising: The target range determination module is used to determine the target battery state range according to a preset base rate table; wherein, the target battery state range is obtained by splitting the base battery state range in the base rate table; The target charging rate determination module is used to determine the target charging rate information based on the target battery state range. The target table construction module is used to construct a target rate table based on the target battery state range and the target charging rate information. The actual charging rate determination module is used to collect the actual battery state information of the battery and determine the actual charging rate information in the target charging rate table based on the actual battery state information. The charging module is used to charge the battery using the actual charging rate information.

[0016] In a third aspect of this application, a vehicle is also provided, characterized in that it includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the method described above.

[0017] In a fourth aspect of this application, a computer-readable storage medium is also provided, characterized in that a computer program is stored on the computer-readable storage medium, and the computer program, when executed by a processor, implements the method described above.

[0018] The embodiments of this application have the following advantages: In this embodiment, a target battery state range is determined based on a preset base rate table. This target battery state range is obtained by subdividing the base battery state ranges in the base rate table. By finely subdividing the battery state ranges in the base rate table to form the target battery state range, this application can reflect more subtle changes in battery state. Target charging rate information is determined based on the target battery state range. A target rate table is constructed based on the target battery state range and the target charging rate information. This application avoids mismatches between charging rate and battery state by determining the charging rate based on detailed battery state information, and obtains a more accurate target rate table that matches the actual battery state. Actual battery state information is collected, and the actual charging rate information is determined in the target rate table based on the actual battery state information. The battery is then charged using the actual charging rate information. This application ensures a smoother and more efficient charging process by determining the charging rate based on the target rate table, thus improving the user's charging experience. Simultaneously, using an actual charging rate that matches the actual battery state to charge the battery can better control heat generation during charging, extend battery life, and improve charging safety and stability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the charging curve of a charging method to be optimized according to an embodiment of this application; Figure 2 This is a flowchart illustrating the steps of a battery charging method according to an embodiment of this application; Figure 3 This is a logic flowchart of a charging process thermal management provided in an embodiment of this application; Figure 4 This is a schematic diagram of the charging curve of an optimized charging method provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a battery charging device provided in an embodiment of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and updates based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0022] With the rapid development of new energy vehicles, people's demands for fast charging experiences are increasing, specifically in terms of shorter charging times and smoother charging current changes. Regarding charging time, there is a need not only to achieve fast charging at higher charging rates, such as when SOC (State of Charge) is ≤90%, but also to shorten charging time during the full charge phase when SOC >90%. Simultaneously, current changes during charging should remain natural and smooth, avoiding significant abrupt changes.

[0023] Existing fast-charging models for lithium-ion batteries in electric vehicles are built based on the battery system's voltage, temperature, and state of charge (SOC). In this model, voltage, temperature, and SOC are grouped according to fixed rows and columns. Lithium-ion battery fast-charging models can also be called charging maps or charging maps.

[0024] It should be noted that the charging rate (C-rate) can be used to describe the speed at which a battery is charged or discharged. It can be a dimensionless numerical value representing the rate at which the battery is charged or discharged. In the embodiments of this application, the charging rate can be used to charge batteries in different states.

[0025] In this embodiment, the existing fast-charging model for lithium-ion batteries in electric vehicles can be represented by a basic rate table. Referring to Table 1, a basic rate table provided in this embodiment is shown.

[0026] As shown in Table 1, the charging states can be grouped as follows: the initial stage is 0%~10%, the final stage is 95%~100%, and the intermediate part can be divided into 5% or 10% increments. Temperature is measured in °C, and temperature groupings are divided into 5°C or 10°C increments. Voltage groupings do not have fixed increments; each charging state corresponds to a specific cell voltage. For example, the initial charging voltage corresponding to 0% SOC is 3.3V, meaning V1 in Table 1 can be set to 3.3V. The maximum charging voltage (i.e., cutoff voltage) corresponding to 100% SOC, or Vn in Table 1, is 4.4V. The charging temperature range for lithium-ion batteries can be set between -20°C and 55°C, and the SOC range can be set from 0% to 100%. C represents the charging rate corresponding to different voltages or temperatures.

[0027] As shown in Table 1, V1, V2...Vn represent the cell voltages corresponding to different charging states. Taking C(1,1) as an example, C(1,1) represents the charging rate used when the charging state is 0%, the cell voltage is V1, and the temperature is -20℃. Taking C(5,n-3) as another example, C(5,n-3) represents the charging rate used when the charging state is 90%, the cell voltage is Vn-2, and the temperature is 20℃.

[0028] Table 1 Basic Ratio Table

[0029] When determining the charging rate, a process of "voltage first, then temperature, and looking up the table to the right" can be adopted. At a specific moment, the cell voltage range of the battery system can be (Vmin, Vmax), and the cell temperature range can be (Tmin, Tmax). Vmin and Vmax represent the minimum and maximum voltage of the battery system at that moment, respectively, while Tmin and Tmax represent the minimum and maximum temperature of the battery system at that moment, respectively.

[0030] For example, if the State of Charge (SOC) is 10%, and assuming the cell voltage range is (Vmin = V1, Vmax = V2), by looking up the table to the right, the cell voltage can be considered as V2. Then, by looking up the table using the cell temperature, assuming the cell temperature range is (Tmin = 20, Tmax = 30), the cell temperature can be considered as 20. The resulting charging rate is C(5, 2). In practice, the charging rate in the base rate table gradually increases as the battery temperature rises, leading to a sharp increase in battery heat generation. Because the battery thermal management strategy and the base rate table are not perfectly matched, the battery state and charging rate are also not perfectly aligned, resulting in a "U"-shaped gap in the charging curve. This negatively impacts the charging experience for car owners.

[0031] Reference Figure 1 The diagram shows a charging curve of a charging method to be optimized according to an embodiment of this application.

[0032] like Figure 1 As shown, the horizontal axis represents the state of charge (SOC), the left vertical axis represents the temperature, and the right vertical axis can represent the charging rate. Figure 1 There are three different lines, representing the charging curve to be optimized, the battery temperature curve, and the cooling water curve, respectively. Tmax11 represents the temperature threshold for entering cooling, and Tmax12 represents the battery temperature at different times. The current battery thermal management strategy is the threshold method, that is, the battery temperature Tmax12 ≤ Tmax11 - ΔTx (Tmax11 is the temperature threshold for entering cooling, Tmax11 - ΔTx is the temperature threshold for exiting cooling, and ΔTx is the difference between the temperature threshold for entering cooling and the temperature threshold for exiting cooling, ΔTx = 3~5℃).

[0033] In practical implementation, considering the lag between battery thermal management and battery heat generation, the cooling system needs to be activated in advance to cope with the rise in battery temperature. However, for large capacity and high charging rates, due to the large charging current, even if the cooling system is activated in advance, it is impossible to effectively control the battery's maximum temperature from rising further. To ensure the safety of the battery system, the basic rate table design limits the charging rate to a relatively low value, that is... Figure 1 The charging curve will have a sudden change at the bottom of the "U"-shaped notch. As a result, the charging current will drop sharply, and the heat generated by the battery will also decrease.

[0034] However, as the battery thermal management system continues to cool, when the heat removed by the cooling system exceeds the heat generated by the battery, the battery temperature will begin to drop, thereby increasing the charging rate again. Figure 1 In some cases, the charging curve exhibits a sudden return to a charging rate similar to that before the abrupt change, where the bottom of the "U"-shaped gap reverts to a near-normal level. This results in a "U"-shaped gap in the charging curve. For car owners, this charging experience is less than ideal.

[0035] Therefore, this application proposes a battery charging method that finely divides the battery state range into target battery state ranges using a preset basic rate table, reflecting more detailed changes in battery state. Target charging rate information is determined based on the target battery state range, and a target rate table is constructed based on the target battery state range and target charging rate information. This application avoids the mismatch between charging rate and battery state by determining the charging rate through detailed battery state determination, and obtains a more accurate target rate table that matches the actual battery state. The actual battery state information is collected, and the actual charging rate information is determined in the target rate table based on the actual battery state information. The battery is then charged using the actual charging rate information. This application determines the charging rate based on the target rate table and then charges the battery, ensuring a smoother and more efficient charging process, improving the user's charging experience. Simultaneously, using an actual charging rate that matches the actual battery state to charge the battery better controls heat generation during charging, extends battery life, and improves charging safety and stability.

[0036] Reference Figure 2 The diagram shows a flowchart of a battery charging method according to an embodiment of this application.

[0037] In this embodiment, the battery charging method can be applied to a charging system. A charging system refers to a general term for equipment and technologies installed inside or outside a vehicle to receive external power and charge the vehicle's power battery. It may include an on-board charger (OBC), a charging interface, a battery management system (BMS), a charging control unit, and related protection circuits. It supports charging the battery via AC or DC and has functions such as intelligent control, overcurrent protection, and temperature monitoring to ensure the safety, efficiency, and optimization of battery life during the charging process. In this embodiment, the charging method can be implemented through a charging system.

[0038] The method may specifically include the following steps: Step 201: Determine the target battery state range according to the preset base rate table; wherein the target battery state range is obtained by splitting the base battery state range in the base rate table.

[0039] In this embodiment, the basic battery state interval in the basic rate table can be divided to obtain the target battery state interval. It is understood that the target battery state interval is a more finely divided interval than the basic battery state interval. The basic battery state interval can characterize the division method of the basic battery states in the basic rate table. Battery states can include voltage, temperature, and charge level. It is understood that the battery's charge level can be represented by its state of charge (SOC).

[0040] Step 202: Determine the target charging rate information based on the target battery state range.

[0041] In this embodiment, the target charging rate information can be determined based on the target battery state range. The target charging rate information can represent the charging rate corresponding to the target battery state range.

[0042] In practical implementation, the target battery state can be analyzed, including parameters such as battery charge, temperature, and voltage. Using this data, the target battery state range can be determined, allowing for the setting of an appropriate charging rate as the target charging rate, thus achieving both fast and safe charging.

[0043] For example, when the battery is at a low temperature, a lower charging rate can be set to avoid damage from rapid charging in cold environments. Conversely, if the battery temperature is suitable and the charge level is low, a higher charging rate can be set to shorten charging time.

[0044] Step 203: Construct a target rate table based on the target battery state range and the target charging rate information.

[0045] In this embodiment, a target rate table can be constructed based on the target battery state range and target charging rate information. The target rate table can be a lithium-ion battery fast-charging model with a more detailed division of battery state ranges compared to the basic rate table; it can also be called a charging MAP or charging mapping table. It is understood that the optimized lithium-ion battery fast-charging model for electric vehicles can be represented by the target rate table.

[0046] Step 204: Collect the actual battery status information and determine the actual charging rate information in the target rate table based on the actual battery status information.

[0047] In this embodiment of the application, the actual battery status information of the battery can be collected. The actual battery status information can refer to the real-time battery status of the battery at the time of information collection, which may include battery (cell) voltage, battery (cell) temperature, battery power, etc.

[0048] Then, based on the battery (cell) voltage, battery (cell) temperature, battery capacity, etc., the corresponding target battery state range can be determined in the target rate table, and then the actual charging rate information corresponding to the target battery state range can be determined.

[0049] Step 205: Charge the battery using the actual charging rate information.

[0050] In this embodiment of the application, the battery can be charged using the actual charging rate information determined in the target rate table.

[0051] In this embodiment, a target battery state range is determined based on a preset base rate table. This target battery state range is obtained by subdividing the base battery state ranges in the base rate table. This application refines the battery state ranges using a preset base rate table to form the target battery state range, reflecting more subtle changes in battery state. Target charging rate information is determined based on the target battery state range. A target rate table is constructed based on the target battery state range and the target charging rate information. This application determines the charging rate based on detailed battery state information, avoiding mismatches between charging rate and battery state, and obtaining a more accurate target rate table that matches the actual battery state. Actual battery state information is collected, and the actual charging rate information is determined in the target rate table based on the actual battery state information. The battery is then charged using the actual charging rate information. This application determines the charging rate based on the target rate table and then charges the battery, ensuring a smoother and more efficient charging process, improving the user's charging experience. Simultaneously, using an actual charging rate that matches the actual battery state allows for better control of heat generation during charging, extending battery life and improving charging safety and stability.

[0052] In one optional embodiment of this application, the target battery state range includes a target voltage range, a target temperature range, and a target charge range, and the base battery state range includes a base voltage range, a base temperature range, and a base charge range.

[0053] The target voltage range is obtained by dividing the basic voltage range according to a preset voltage scale value; The target temperature range is obtained by dividing the basic temperature range according to a preset temperature scale value; The target power range is obtained by dividing the basic power range according to a preset power scale value.

[0054] In this embodiment of the application, the target voltage range, target temperature range, and target charge range are the voltage range, temperature range, and charge range in the target rate table. The target rate table may include the target voltage range, target temperature range, and target charge range.

[0055] The base voltage range, base temperature range, and base charge range are the voltage range, temperature range, and charge range in the base multiplier table. The base multiplier table can include the base voltage range, base temperature range, and base charge range.

[0056] In this embodiment of the application, the target voltage range is obtained by dividing the basic voltage range according to a preset voltage scale value. The voltage scale value can refer to the cell voltage scale value, which can be set according to actual needs.

[0057] In a specific implementation, the voltage range of the battery cell can be refined. If the standard voltage of the cell corresponding to 0% SOC is V0 (V0 = 3.3V), and the standard voltage of the cell corresponding to 100% SOC is V100 (V100 = 4.4V), and the voltage division value is ΔV, then the number of cell voltage divisions Nv = (V100 - V0) / ΔV. In this embodiment, the voltage division value ΔV can be set between 30mV and 100mV. Preferably, the voltage division value ΔV can be taken between 30mV and 50mV.

[0058] Since the voltage grouping in the base rate table does not have a fixed scale, but rather each charging state corresponds to a specific cell voltage, the base voltage range division in the base rate table is rather coarse. This application re-divides the base voltage range according to the voltage scale value ΔV, which can obtain a more granular target voltage range.

[0059] In this embodiment of the application, the target temperature range is obtained by dividing the basic temperature range according to a preset temperature scale value. The temperature scale value can refer to the cell temperature scale value, which can be set according to actual needs.

[0060] In practical implementation, the temperature range of the battery cell can be refined. In the basic rate table, the temperature grouping uses 5℃ or 10℃ as the smallest division. The original 5℃~10℃ range is refined, with the temperature division value being ΔT. Then, the cell temperature division number Nt = (Ntmax - Ntmin) / ΔT, where Ntmax and Ntmin are the maximum and minimum rechargeable temperatures of the battery, respectively. For example, the maximum battery charging temperature Ntmax can be set to 55℃, and the minimum battery charging temperature Ntmin can be set to -20℃. In this embodiment, the temperature division value ΔT can be set to 1~3℃.

[0061] Since the temperature grouping in the basic ratio table uses 5℃ or 10℃ as the smallest scale, the basic temperature range division in the basic ratio table is relatively coarse. This application re-divides the basic temperature range according to the temperature scale value ΔT, which can obtain a more granular target temperature range.

[0062] In this embodiment of the application, the target power range is obtained by dividing the basic power range according to a preset power scale value, wherein the power scale value can be set according to actual needs.

[0063] In a specific implementation, the basic power range in the basic multiplier table can use 5% or 10% as the minimum division, and the power division value of 5% or 10% can be further refined. In the embodiment of this application, the power division value can be set to 5%.

[0064] Since the basic power rating table uses 5% or 10% as the minimum scale for grouping the power, the basic temperature range division in the basic power rating table is relatively coarse. This application re-divides the basic power range according to the power rating scale value of 5%, which can obtain a more granular target power range.

[0065] In this embodiment of the application, referring to Table 2, a target magnification table of this embodiment is shown.

[0066] Table 2 Target Multiplier Table

[0067] The State of Charge (SOC) in Table 2 corresponds to the battery capacity. Temperature and voltage can be divided according to the above-mentioned scale values. As shown in Table 2, V1, V2…Vn represent the cell voltages corresponding to different charging states, and the charging states are also divided in 5% increments. Compared to the base rate table, each base voltage range in the target rate table is divided into several target voltage ranges. For example, the base voltage range V1 is divided into target voltage ranges V1, V1+ΔV, and V1+2ΔV, etc. Similarly, compared to the base rate table, each base temperature range in the target rate table is divided into several target temperature ranges. For example, the base temperature range -20℃ is divided into target temperature ranges -20℃, -19℃, -18℃, etc. Furthermore, it can be understood that in the target rate table of Table 2, when the charging state is 5%, 10%, etc., the corresponding cell voltage is also similar to the target voltage ranges V1, V1+ΔV, and V1+2ΔV, such as Vn, Vn+ΔV, and Vn+2ΔV, etc.

[0068] Taking C(1,1) as an example, C(1,1) represents the charging rate used when the state of charge is 0%, the cell voltage is V1, and the temperature is -20℃. Taking C(1B,1a) as another example, C(1B,1a) represents the charging rate used when the state of charge is 0%, the cell voltage is V1+ΔV, and the temperature is -18℃.

[0069] Comparing the contents of the target rate table in Table 2 with those in the basic rate table in Table 1, it can be found that the basic rate table groups the battery capacity with a minimum increment of 5% or 10%, while the target rate table sets the state of charge (SOC), i.e., the battery capacity increment value, to 5%, thus obtaining a more granular target battery capacity range.

[0070] Furthermore, the base voltage range V1 in the base multiplier table is divided into multiple target voltage ranges in the target multiplier table according to the voltage scale value ΔV, such as V1, V1+ΔV, and V1+2ΔV. It can be understood that the target voltage ranges included in the base voltage range V1 are not limited to V1, V1+ΔV, and V1+2ΔV. The number of target voltage ranges can be adjusted according to the voltage scale value ΔV.

[0071] In addition, for the basic temperature range in the basic multiplier table, the temperature is grouped with a minimum scale of 5℃ or 10℃, such as 10℃~20℃, 50℃~55℃, etc. It is then divided into multiple target temperature ranges in the target multiplier table according to the temperature scale value ΔT, such as -20℃, -19℃, and -18℃. It can be understood that the target temperature ranges included in the basic temperature range are not limited to -20℃, -19℃, and -18℃. The number of target temperature ranges can be adjusted according to the temperature scale value ΔT.

[0072] Compared to the base rate table, the target rate table has finer granularity in terms of capacity, voltage, and temperature. The corresponding charging rate in the target rate table will also correspond more precisely with temperature and voltage. The battery's rate switching during constant current charging is more precise, and the charging rate can avoid large jumps, thus avoiding the "U"-shaped gap in the charging curve.

[0073] In one optional embodiment of this application, step 202 further includes the following steps: S11, determine the target charging rate information based on the target voltage range, the target temperature range, and the target charge range.

[0074] In this embodiment, the target charging rate information can be determined based on the target voltage range, target temperature range, and target charge range. The target charging rate information is the charging rate in the target charging rate table.

[0075] In practice, the target charging rate information can be recalibrated based on the refined target voltage range, target temperature range, and target capacity range, according to the battery's charging characteristics.

[0076] Taking the target charging rate table in Table 2 as an example, the target charging rate information can be the charging rates C(1,1), C(1,1a), C(1,1b), C(1A,1) and C(1A,1a) in Table 2.

[0077] This application employs refined target voltage, temperature, and charge ranges to more accurately reflect the battery's current state, thereby enabling recalibration of the charging rate based on the battery's charging characteristics. This not only avoids overcharging or over-discharging, extending battery life, but also optimizes charging time, improves user experience, and allows for refined management of the charging rate, ensuring battery stability and safety under different operating conditions.

[0078] During battery charging, when the battery level exceeds 90%, it's typically necessary to switch from constant current charging mode to constant voltage charging mode to reduce charging current and eliminate polarization. However, within this charging range, the charging rate decreases significantly, resulting in a substantial increase in charging time. Especially when the battery level exceeds 95%, the charging rate may drop to 0.01C~0.05C, further slowing down the charging speed. Statistics show that the charging time for the last 10% of battery level can exceed 50% of the total full charge time, severely impacting the charging experience for car owners.

[0079] Therefore, this application proposes a charging method that increases the charging rate at the end of the charging process, as follows: In one optional embodiment of this application, the basic rate table further includes basic end-of-life range and basic end-of-life charging rate information, and the target rate table further includes target end-of-life range and target end-of-life charging rate information; The basic end-of-charge power range is the basic power range corresponding to the preset charging end-of-charge power threshold in the basic rate table. The basic end-point charging rate information is the basic charging rate information corresponding to the basic end-point power range in the basic rate table; The target end-of-charge range is the target charge range corresponding to the preset end-of-charge charge threshold in the target rate table; The target end-point charging rate information is the target charging rate information corresponding to the target end-point power range in the target charging rate table; the target end-point charging rate information is greater than the base end-point charging rate information; The method further includes the following steps: S21, if the battery capacity is greater than or equal to the charging end capacity threshold, then the battery is charged using the target end charging rate information.

[0080] It should be noted that the charging end power threshold is the power threshold of the battery at the end of the charging process, such as 95%, and can be set according to the actual situation.

[0081] In this embodiment of the application, the basic rate table also includes a basic end-point power range and basic end-point charging rate information. The basic end-point power range is the basic power range corresponding to the preset charging end-point power threshold in the basic rate table, and the basic end-point charging rate information is the basic charging rate information corresponding to the basic end-point power range in the basic rate table.

[0082] In the specific implementation, you can refer to the basic rate table in Table 1. Taking the charging end power threshold of 95% and the temperature of 55℃ as an example, the basic end power range can be 95% and 100%, and the basic end charging rate information can be C(10, n-1) and C(10, n).

[0083] In this embodiment, the target charging rate table further includes a target end-point battery capacity range and target end-point charging rate information. The target end-point battery capacity range is the target battery capacity range corresponding to a preset end-point battery capacity threshold in the target charging rate table. The target end-point charging rate information is the target charging rate information corresponding to the target end-point battery capacity range in the target charging rate table. The target end-point charging rate information is greater than the base end-point charging rate information.

[0084] In the specific implementation, the target rate table in Table 2 can be referred to. Taking the charging end power threshold of 95% and the temperature of 55℃ as an example, the basic end power range can be 95% to 100%. The basic end charging rate information can be several target end charging rate information corresponding to the charging state of 95% and C(10,n), C(10,na) and C(10,nb) corresponding to the charging state of 100%.

[0085] The statement that the target end-charge rate information is greater than the base end-charge rate information means that, during the process of recalibrating the target charge rate information according to the refined target voltage range, target temperature range, and target capacity range, and based on the battery's charging characteristics, when the target charge rate exceeds the end-charge capacity threshold, the charge rate in the target rate table corresponding to the same charging state, voltage, and temperature is calibrated as greater than the charge rate in the base rate table corresponding to the same charging state, voltage, and temperature. Taking Tables 1 and 2 as examples, for the same charging state of 100%, voltage Vn, and temperature of -20℃, the charge rate C(1,n) value in the target rate table is greater than the charge rate C(1,n) value in the base rate table. Similarly, for the same charging state of 100%, voltage Vn, and temperature of 55℃, the charge rate C(10,n) value in the target rate table is greater than the charge rate C(10,n) value in the base rate table.

[0086] In this embodiment of the application, if the battery capacity is greater than or equal to the charging end capacity threshold, the battery is charged using the target end charging rate information.

[0087] In practical implementation, assuming the final charge level is 95% and the charging rate in the basic rate table is 0.1C, the charging time t = (100-95) / 0.1*60 = 30 minutes. By increasing the charging rate to 0.15C in the target rate table, the charging time t = (100-95) / 0.15*60 = 20 minutes, reducing the charging time from 30 minutes to 20 minutes and improving the user's charging experience.

[0088] This application effectively shortens charging time and improves user experience by increasing the charging rate at the charging end. Specifically, when the battery level exceeds the charging end threshold (e.g., 95%), a target charging rate is used for charging. This rate is greater than the base charging rate, thereby accelerating the charging speed and improving the user's charging experience.

[0089] In one optional embodiment of this application, the actual battery state information includes actual voltage information, actual temperature information, and actual charge information. Step 204 further includes the following steps: S31, Collect the actual voltage information, the actual temperature information, and the actual charge information of the battery; S32, the target voltage range corresponding to the actual voltage information in the target multiplier table is taken as the actual voltage range; S33, the actual temperature information is taken as the target temperature range corresponding to the target magnification table as the actual temperature range; S34, the target power range corresponding to the actual power information in the target multiplier table is taken as the actual power range; S35, the target charging rate information corresponding to the actual voltage range, the actual temperature range and the actual power range in the target rate table is used as the actual charging rate information.

[0090] In this embodiment, the actual voltage information, actual temperature information, and actual charge information of the battery can be collected. The actual voltage information refers to the real-time collected voltage information of the battery (cell). The actual temperature information refers to the real-time collected temperature information of the battery (cell). The actual charge information refers to the real-time collected charge information of the battery (cell).

[0091] In this embodiment, the target voltage range corresponding to the actual voltage information in the target rate table can be used as the actual voltage range, the target temperature range corresponding to the actual temperature information in the target rate table can be used as the actual temperature range, and the target power range corresponding to the actual power information in the target rate table can be used as the actual power range. Then, the target charging rate information corresponding to the actual voltage range, actual temperature range, and actual power range in the target rate table can be used as the actual charging rate information.

[0092] This application dynamically determines the actual charging rate by collecting real-time data on the battery's actual voltage, temperature, and charge level, and mapping these data to the corresponding target voltage, temperature, and charge ranges in a target rate table. This refined management approach based on the actual battery state ensures that the charging rate precisely matches the battery's current state, improving charging efficiency and safety, while also optimizing charging time and significantly enhancing the user's charging experience.

[0093] In an optional embodiment of this application, the actual voltage information includes actual voltage upper limit information and actual voltage lower limit information, and step S32 further includes the following steps: S41, the target voltage range corresponding to the actual voltage upper limit information in the target multiplier table is taken as the actual voltage upper limit range; S42, the target voltage range corresponding to the actual voltage lower limit information in the target multiplier table is taken as the actual voltage lower limit range; S43, the upper limit range of the actual voltage and the lower limit range of the actual voltage are taken as the actual voltage range.

[0094] It should be noted that the actual voltage upper limit information can be the highest voltage Vmax of the battery at a certain moment, and the actual voltage lower limit information can be the lowest voltage Vmin of the battery at a certain moment. In the embodiments of this application, the actual voltage range of the battery at this moment can be determined based on Vmax and Vmin.

[0095] In this embodiment, the target voltage range corresponding to the upper limit information of the actual voltage in the target multiplier table can be used as the upper limit range of the actual voltage, and the target voltage range corresponding to the lower limit information of the actual voltage in the target multiplier table can be used as the lower limit range of the actual voltage. The upper limit range of the actual voltage and the lower limit range of the actual voltage can be used as the actual voltage range.

[0096] In the specific implementation, you can refer to the target rate table in Table 2. When the charging state is 0%, assuming that the highest battery voltage Vmax is V1+2ΔV and the lowest voltage Vmin is V1, you can look up the voltages to the right of Vmax and Vmin respectively, and select them downwards to obtain two columns of charging rate values. That is, you can obtain the charging rate of the column C(1,1), C(1A,1), C(1B,1)...C(2,1)...C(10,1) corresponding to the lowest voltage Vmin and the charging rate of the column C(1,1b), C(1A,1b), C(1B,1b)...C(2,1b)...C(10,1b) corresponding to the highest voltage Vmax.

[0097] In an optional embodiment of this application, the actual temperature information includes actual temperature upper limit information and actual temperature lower limit information, and step S33 further includes the following steps: S51, the target temperature range corresponding to the actual temperature upper limit information in the target magnification table is taken as the actual temperature upper limit range; S52, the target temperature range corresponding to the actual temperature lower limit information in the target magnification table is taken as the actual temperature lower limit range; S53, the upper limit range of the actual temperature and the lower limit range of the actual temperature are taken as the actual temperature range.

[0098] It should be noted that the actual upper temperature limit information can be the highest temperature Tmax of the battery at a certain moment, and the actual lower temperature limit information can be the lowest temperature Tmin of the battery at a certain moment. In the embodiments of this application, the actual temperature range of the battery at this moment can be determined based on Tmax and Tmin.

[0099] In this embodiment, the target temperature range corresponding to the upper limit of the actual temperature information in the target magnification table can be used as the upper limit of the actual temperature range, the target temperature range corresponding to the lower limit of the actual temperature information in the target magnification table can be used as the lower limit of the actual temperature range, and the upper limit of the actual temperature range and the lower limit of the actual temperature range can be used as the actual temperature range.

[0100] In the specific implementation, you can refer to the target rate table in Table 2. When the charging state is 0%, assuming that the highest battery temperature Tmax is -15 and the lowest temperature Tmin is -20, you can look up the nearest temperature in the table according to Tmax and Tmin respectively, and select it to the right to get two rows of charging rate values. That is, you can get the charging rate of the row corresponding to the lowest temperature Tmin, which is C(1,1), C(1,1a), C(1,1b)...C(1,2)...C(1,n), C(1,na), C(1,nb) and the charging rate of the row corresponding to the highest temperature Tmax, which is C(2,1), C(2,1a), C(2,1b)...C(2,2)...C(2,n), C(2,na), C(2,nb).

[0101] In one optional embodiment of this application, step S35 further includes the following steps: S61, the target charging rate information corresponding to the actual voltage upper limit range, the actual temperature upper limit range and the actual power range in the target rate table is used as the first charging rate information; S62, the target charging rate information corresponding to the actual voltage upper limit range, the actual temperature lower limit range and the actual power range in the target rate table is used as the second charging rate information; S63, the target charging rate information corresponding to the actual voltage lower limit range, the actual temperature upper limit range and the actual power range in the target rate table is used as the third charging rate information; S64, the target charging rate information corresponding to the actual voltage lower limit range, the actual temperature lower limit range and the actual power range in the target rate table is used as the fourth charging rate information; S65, select the actual charging rate information from the first charging rate information, the second charging rate information, the third charging rate information, and the fourth charging rate information.

[0102] In this embodiment, the target charging rate information corresponding to the upper limit range of actual voltage, the upper limit range of actual temperature, and the actual capacity range in the target charging rate table can be used as the first charging rate information. The target charging rate information corresponding to the upper limit range of actual voltage, the lower limit range of actual temperature, and the actual capacity range in the target charging rate table can be used as the second charging rate information. The target charging rate information corresponding to the lower limit range of actual voltage, the upper limit range of actual temperature, and the actual capacity range in the target charging rate table can be used as the third charging rate information. The target charging rate information corresponding to the lower limit range of actual voltage, the lower limit range of actual temperature, and the actual capacity range in the target charging rate table can be used as the fourth charging rate information.

[0103] In this embodiment, the actual charging rate information is selected from the first charging rate information, the second charging rate information, the third charging rate information, and the fourth charging rate information. Specifically, the charging rate information with the largest charging rate value among the first, second, third, and fourth charging rate information can be selected as the actual charging rate information.

[0104] In the specific implementation, refer to Table 2, the target charging rate table. As shown above, when the charging state is 0%, assuming the battery's highest voltage Vmax is V1 + 2ΔV, the lowest voltage Vmin is V1, the highest battery temperature Tmax is -15°C, and the lowest temperature Tmin is -20°C, two columns and two rows of charging rates have been obtained. Four charging rates corresponding to the overlapping points of the two columns and two rows can be obtained, namely C(1,1), C(1,1b), C(2,1), and C(2,1b). Here, C(2,1b) can be the first charging rate information, C(1,1b) can be the second charging rate information, C(2,1) can be the third charging rate information, and C(1,1) can be the fourth charging rate information.

[0105] Then, the largest charging rate among the four charging rates C(1,1), C(1,1b), C(2,1), and C(2,1b) is selected as the charging rate corresponding to the battery under the following conditions: charging state is 0%, battery maximum voltage Vmax is V1+2ΔV, minimum voltage Vmin is V1, battery maximum temperature Tmax is -15, and minimum temperature Tmin is -20. This can shorten the charging time and improve the user's charging experience.

[0106] To shorten the charging time at the end of the full charge, the above methods increase the charging rate at the end of the charge, especially in the 95%–100% SOC range. Simultaneously, due to the increased charging rate, the deteriorating charging polarization at the end of the charge needs to be eliminated. Current battery thermal management strategies use a threshold method, where the battery temperature Tmax12 ≤ Tmax11 - ΔTx (Tmax11 is the temperature threshold for entering cooling, Tmax11 - ΔTx is the temperature threshold for exiting cooling, and ΔTx is the difference between the entry and exit cooling thresholds, ΔTx = 3~5℃). Furthermore, the current battery thermal management strategy's exit cooling threshold Tmax11 - ΔTx is typically higher than 30℃. This means that when the battery's charge exceeds the end-of-charge threshold, the battery thermal management strategy has already exited, and continuous cooling of the battery is no longer possible.

[0107] This application reduces battery temperature by adding a forced end-of-charge battery thermal management strategy. The strategy is activated based on a charging end-of-charge capacity threshold; when the actual battery capacity is greater than or equal to this threshold, the battery enters the constant-voltage charging phase, forcibly activating thermal management to further reduce battery temperature. Compared to current methods that only eliminate polarization through pulse discharge, the forced end-of-charge battery thermal management strategy has the advantage of having no impact on the overall vehicle architecture and eliminating battery polarization in two ways: through slight discharge and by reducing battery temperature. The specific solution is as follows: In one optional embodiment of this application, the charging system includes a thermal management component, and the method further includes the following steps: S71, if the actual power information is less than the preset thermal management pause power threshold, and the actual voltage upper limit information is less than the preset thermal management pause voltage threshold, then control the thermal management component to perform thermal management on the battery. S72, if the actual power information is greater than or equal to the preset thermal management pause power threshold, or the actual voltage upper limit information is greater than or equal to the preset thermal management pause voltage threshold, then control the thermal management component to pause thermal management of the battery.

[0108] It should be noted that the thermal management component can be a thermal management system on a vehicle. In this embodiment, the thermal management component can be used to manage the thermal properties of the battery.

[0109] In this embodiment, if the actual battery level is less than a preset thermal management pause battery level threshold, and the actual voltage limit is less than a preset thermal management pause voltage threshold, the thermal management component can be controlled to perform thermal management on the battery. The thermal management pause battery level threshold can refer to the battery level threshold corresponding to the battery switching between constant current and constant voltage charging modes, and the thermal management pause voltage threshold can refer to the voltage threshold corresponding to the battery at this battery level threshold.

[0110] If the actual power level is greater than or equal to the preset thermal management pause power level threshold, or if the actual voltage limit is greater than or equal to the preset thermal management pause voltage threshold, the thermal management component can be controlled to pause thermal management of the battery.

[0111] In one optional embodiment of this application, the method further includes the following steps: S81, if the actual power information is greater than or equal to a preset charging end power threshold, then control the thermal management component to re-perform thermal management on the battery; wherein, the charging end power threshold is greater than the thermal management pause power threshold.

[0112] In this embodiment, if the actual battery level is greater than or equal to a preset charging end battery level threshold, the thermal management component can be controlled to re-perform thermal management of the battery. The charging end battery level threshold is greater than the thermal management pause battery level threshold.

[0113] In the specific implementation, you can refer to Figure 3 Perform thermal management during the charging process. Figure 3 A logic flowchart of a charging process thermal management method provided in an embodiment of this application is shown.

[0114] Once charging begins, the system first collects battery status information, such as the actual upper voltage limit, actual lower voltage limit, actual upper temperature limit, actual lower temperature limit, and actual battery level.

[0115] Then, it determines whether thermal management should be paused. This can be done based on the actual battery level and the actual voltage limit. If the actual battery level is less than the preset thermal management pause threshold, and the actual voltage limit is less than the preset thermal management pause voltage threshold, then the thermal management component can be controlled to perform thermal management on the battery. Then, fast charging begins; the thermal management performed at this stage is the battery thermal management for the fast charging phase.

[0116] If the actual power level is greater than or equal to the preset thermal management pause power level threshold, or if the actual voltage limit is greater than or equal to the preset thermal management pause voltage threshold, the thermal management component can be controlled to pause thermal management of the battery.

[0117] After pausing battery thermal management, the system can determine whether to restart thermal management based on the actual battery level. If the actual battery level is greater than or equal to a preset charging end-of-charge threshold, the thermal management component can be controlled to restart battery thermal management. This charging end-of-charge threshold is greater than the thermal management pause threshold.

[0118] After the battery is re-entered for thermal management, the thermal management system activated at this time is the end-stage thermal management cooling.

[0119] During this stage, you can continuously determine whether the battery is fully charged based on the actual battery level information.

[0120] If not fully charged, end-of-charge thermal management cooling will continue. If fully charged, end-of-charge thermal management cooling can be discontinued, and charging will end.

[0121] This application addresses the issue of insufficient cooling at the charging end by adding a forced battery thermal management strategy, thereby improving polarization elimination at the charging end. When the battery's actual charge level reaches the charging end threshold, this application forcibly activates the thermal management components to further reduce the battery temperature. Polarization is eliminated through a combination of partial discharge and temperature control, ensuring charging safety and efficiency. Furthermore, this application requires no changes to the overall vehicle architecture, exhibiting high compatibility and practicality, and significantly optimizing charging end performance and user experience.

[0122] In the specific implementation, Figure 4 A schematic diagram of the charging curve of an optimized charging method provided in an embodiment of this application is shown.

[0123] like Figure 4 As shown, the horizontal axis represents the state of charge (SOC), the left vertical axis represents the temperature, and the right vertical axis can represent the charging rate. Figure 1 There are four different lines, representing the charging curve to be optimized, the optimized charging curve, the battery temperature curve, and the cooling water curve, respectively. Tmax11 is the temperature threshold for entering cooling, Tmax11-ΔTx is the cooling exit threshold, and ΔTx is the difference between the cooling entry threshold and the cooling exit threshold, ΔTx=3~5℃.

[0124] By dividing voltage and temperature into distinct parameters, the charging rate switching during battery charging is more precise, with no large jumps in the charging rate value, thus avoiding a "U"-shaped charging gap. Furthermore, near the end of the charging process, end-of-charge thermal management cooling is activated to further reduce battery temperature, ensuring charging safety and efficiency.

[0125] Reference Figure 5 This illustration shows a schematic diagram of a battery charging device according to an embodiment of this application, applied to a charging system. The device includes: The target range determination module 501 is used to determine the target battery state range according to a preset base rate table; wherein, the target battery state range is obtained by splitting the base battery state range in the base rate table; The target charging rate determination module 502 is used to determine the target charging rate information based on the target battery state range. The target table construction module 503 is used to construct a target rate table based on the target battery state range and the target charging rate information. The actual charging rate determination module 504 is used to collect the actual battery state information of the battery and determine the actual charging rate information in the target charging rate table based on the actual battery state information. The charging module 505 is used to charge the battery using the actual charging rate information.

[0126] In one optional embodiment of this application, the target battery state range includes a target voltage range, a target temperature range, and a target charge range, and the base battery state range includes a base voltage range, a base temperature range, and a base charge range; the target voltage range is obtained by dividing the base voltage range according to a preset voltage scale value; the target temperature range is obtained by dividing the base temperature range according to a preset temperature scale value; and the target charge range is obtained by dividing the base charge range according to a preset charge scale value.

[0127] In one optional embodiment of this application, the target magnification determination module 502 includes: The target charging rate determination submodule is used to determine the target charging rate information based on the target voltage range, the target temperature range, and the target charge range.

[0128] In one optional embodiment of this application, the basic rate table further includes a basic end-of-charge capacity range and basic end-of-charge rate information, and the target rate table further includes a target end-of-charge capacity range and target end-of-charge rate information; the basic end-of-charge capacity range is the basic capacity range corresponding to a preset end-of-charge capacity threshold in the basic rate table; the basic end-of-charge rate information is the basic charging rate information corresponding to the basic end-of-charge capacity range in the basic rate table; the target end-of-charge capacity range is the target capacity range corresponding to the preset end-of-charge capacity threshold in the target rate table; the target end-of-charge rate information is the target charging rate information corresponding to the target end-of-charge capacity range in the target rate table; the target end-of-charge rate information is greater than the basic end-of-charge rate information; The device further includes: The end-of-line charging module is used to charge the battery using the target end-of-line charging rate information if the battery's charge level is greater than or equal to the end-of-line charge level threshold.

[0129] In one optional embodiment of this application, the actual battery state information includes actual voltage information, actual temperature information, and actual charge information, and the actual rate determination module 504 includes: The information acquisition submodule is used to acquire the actual voltage information, the actual temperature information, and the actual power information of the battery; The voltage range determination submodule is used to take the target voltage range corresponding to the actual voltage information in the target multiplier table as the actual voltage range; The temperature range determination submodule is used to take the target temperature range corresponding to the actual temperature information in the target magnification table as the actual temperature range. The power range determination submodule is used to take the target power range corresponding to the actual power information in the target multiplier table as the actual power range. The actual charging rate determination submodule is used to take the target charging rate information corresponding to the actual voltage range, the actual temperature range, and the actual power range in the target charging rate table as the actual charging rate information.

[0130] In one optional embodiment of this application, the actual voltage information includes actual voltage upper limit information and actual voltage lower limit information, and the voltage range determination submodule includes: The voltage upper limit determination unit is used to take the target voltage range corresponding to the actual voltage upper limit information in the target multiplier table as the actual voltage upper limit range; A voltage lower limit determination unit is used to take the target voltage range corresponding to the actual voltage lower limit information in the target multiplier table as the actual voltage lower limit range; A voltage range determination unit is used to determine the upper limit range of the actual voltage and the lower limit range of the actual voltage as the actual voltage range.

[0131] In one optional embodiment of this application, the actual temperature information includes actual temperature upper limit information and actual temperature lower limit information, and the temperature range determination submodule includes: The temperature upper limit determination unit is used to take the target temperature range corresponding to the actual temperature upper limit information in the target magnification table as the actual temperature upper limit range. The lower limit determination unit is used to take the target temperature range corresponding to the actual lower limit information in the target magnification table as the actual lower limit range; A temperature range determination unit is used to determine the upper limit range of the actual temperature and the lower limit range of the actual temperature as the actual temperature range.

[0132] In one optional embodiment of this application, the actual magnification determination submodule includes: The first rate determination unit is used to take the target charging rate information corresponding to the actual voltage upper limit range, the actual temperature upper limit range and the actual power range in the target rate table as the first charging rate information. The second rate determination unit is used to take the target charging rate information corresponding to the actual voltage upper limit range, the actual temperature lower limit range and the actual power range in the target rate table as the second charging rate information; The third rate determination unit is used to take the target charging rate information corresponding to the actual voltage lower limit range, the actual temperature upper limit range and the actual power range in the target rate table as the third charging rate information. The fourth rate determination unit is used to take the target charging rate information corresponding to the actual voltage lower limit range, the actual temperature lower limit range, and the actual power range in the target rate table as the fourth charging rate information; The actual charging rate determination unit is used to select the actual charging rate information from the first charging rate information, the second charging rate information, the third charging rate information, and the fourth charging rate information.

[0133] In one optional embodiment of this application, the charging system includes a thermal management component, and the device further includes: The thermal management module is used to control the thermal management component to perform thermal management on the battery if the actual power information is less than a preset thermal management pause power threshold and the actual voltage upper limit information is less than a preset thermal management pause voltage threshold. The thermal management pause module is used to control the thermal management component to pause thermal management of the battery if the actual power information is greater than or equal to the preset thermal management pause power threshold, or the actual voltage upper limit information is greater than or equal to the preset thermal management pause voltage threshold.

[0134] In one optional embodiment of this application, the apparatus further includes: The thermal management restart module is used to control the thermal management component to re-perform thermal management on the battery if the actual power information is greater than or equal to a preset charging end power threshold; wherein the charging end power threshold is greater than the thermal management pause power threshold.

[0135] One embodiment of this application also provides a vehicle that may include a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the method described above.

[0136] An embodiment of this application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, it implements the method described above.

[0137] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0138] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0139] Those skilled in the art will understand that embodiments of this application can be provided as methods, apparatus, or computer program products. Therefore, embodiments of this application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of this application can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0140] This application describes embodiments with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0141] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0142] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0143] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other modifications and updates to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all modifications and updates falling within the scope of the embodiments of the present application.

[0144] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the aforementioned element.

[0145] The above provides a detailed description of the battery charging method, apparatus, vehicle, and medium. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery charging method, characterized in that, Applied to a charging system, the method includes: The target battery state range is determined according to a preset base rate table; wherein, the target battery state range is obtained by splitting the base battery state range in the base rate table. Determine the target charging rate information based on the target battery state range; Construct a target rate table based on the target battery state range and the target charging rate information; Collect the battery's actual voltage, actual temperature, and actual charge information; The actual voltage information is taken as the target voltage range corresponding to the target multiplier table; The actual temperature range is defined as the target temperature range corresponding to the actual temperature information in the target magnification table. The target power range corresponding to the actual power information in the target multiplier table is taken as the actual power range. The target charging rate information corresponding to the actual voltage upper limit range, the actual temperature upper limit range, and the actual power range in the target rate table is used as the first charging rate information; The target charging rate information corresponding to the actual voltage upper limit range, the actual temperature lower limit range, and the actual power range in the target rate table is used as the second charging rate information; The target charging rate information corresponding to the actual voltage lower limit range, the actual temperature upper limit range, and the actual power range in the target rate table is used as the third charging rate information; The target charging rate information corresponding to the actual voltage lower limit range, the actual temperature lower limit range, and the actual power range in the target rate table is used as the fourth charging rate information; The actual charging rate information is selected from the first charging rate information, the second charging rate information, the third charging rate information, and the fourth charging rate information; The battery is charged using the actual charging rate information.

2. The method according to claim 1, characterized in that, The target battery state range includes a target voltage range, a target temperature range, and a target charge range; the base battery state range includes a base voltage range, a base temperature range, and a base charge range. The target voltage range is obtained by dividing the base voltage range according to a preset voltage scale value; the target temperature range is obtained by dividing the base temperature range according to a preset temperature scale value. The target power range is obtained by dividing the basic power range according to a preset power scale value.

3. The method according to claim 2, characterized in that, Determining the target charging rate information based on the target battery state range includes: The target charging rate information is determined based on the target voltage range, the target temperature range, and the target charge range.

4. The method according to claim 3, characterized in that, The basic rate table also includes basic end-point power range and basic end-point charging rate information, and the target rate table also includes target end-point power range and target end-point charging rate information; the basic end-point power range is the basic power range corresponding to the preset end-point power threshold in the basic rate table; the basic end-point charging rate information is the basic charging rate information corresponding to the basic end-point power range in the basic rate table; The target end-of-charge range is the target charge range corresponding to the preset end-of-charge charge threshold in the target rate table; The target end-point charging rate information is the target charging rate information corresponding to the target end-point power range in the target rate table; The target terminal charging rate information is greater than the basic terminal charging rate information; The method further includes: If the battery's charge level is greater than or equal to the charging terminal charge level threshold, then the battery is charged using the target terminal charging rate information.

5. The method according to claim 1, characterized in that, The actual voltage information includes actual voltage upper limit information and actual voltage lower limit information. The step of using the target voltage range corresponding to the actual voltage information in the target multiplier table as the actual voltage range includes: The target voltage range corresponding to the actual voltage upper limit information in the target multiplier table is taken as the actual voltage upper limit range; The target voltage range corresponding to the actual voltage lower limit information in the target multiplier table is taken as the actual voltage lower limit range; The upper limit range of the actual voltage and the lower limit range of the actual voltage are defined as the actual voltage range.

6. The method according to claim 1, characterized in that, The actual temperature information includes upper limit information and lower limit information of the actual temperature. The step of using the target temperature range corresponding to the actual temperature information in the target magnification table as the actual temperature range includes: The target temperature range corresponding to the actual temperature upper limit information in the target magnification table shall be used as the actual temperature upper limit range. The target temperature range corresponding to the actual temperature lower limit information in the target magnification table is taken as the actual temperature lower limit range; The upper limit range of the actual temperature and the lower limit range of the actual temperature are defined as the actual temperature range.

7. The method according to claim 5, characterized in that, The charging system includes a thermal management component, and the method further includes: If the actual power information is less than the preset thermal management pause power threshold, and the actual voltage upper limit information is less than the preset thermal management pause voltage threshold, then the thermal management component is controlled to perform thermal management on the battery. If the actual power information is greater than or equal to the preset thermal management pause power threshold, or the actual voltage upper limit information is greater than or equal to the preset thermal management pause voltage threshold, then the thermal management component is controlled to pause thermal management of the battery.

8. The method according to claim 7, characterized in that, The method further includes: If the actual power information is greater than or equal to a preset charging end power threshold, the thermal management component is controlled to re-perform thermal management on the battery; wherein the charging end power threshold is greater than the thermal management pause power threshold.

9. A battery charging device, characterized in that, The device, used in a charging system, includes: The target range determination module is used to determine the target battery state range according to a preset base rate table; wherein, the target battery state range is obtained by splitting the base battery state range in the base rate table; The target charging rate determination module is used to determine the target charging rate information based on the target battery state range. The target table construction module is used to construct a target rate table based on the target battery state range and the target charging rate information. The actual charging rate determination module is used to collect the actual battery state information of the battery and determine the actual charging rate information in the target charging rate table based on the actual battery state information. A charging module is used to charge the battery using the actual charging rate information. The actual battery status information includes actual voltage information, actual temperature information, and actual charge information. The actual rate determination module includes: The information acquisition submodule is used to acquire the actual voltage information, the actual temperature information, and the actual power information of the battery; The voltage range determination submodule is used to take the target voltage range corresponding to the actual voltage information in the target multiplier table as the actual voltage range; The temperature range determination submodule is used to take the target temperature range corresponding to the actual temperature information in the target magnification table as the actual temperature range. The power range determination submodule is used to take the target power range corresponding to the actual power information in the target multiplier table as the actual power range. The actual charging rate determination submodule is used to take the target charging rate information corresponding to the actual voltage range, the actual temperature range, and the actual power range in the target charging rate table as the actual charging rate information; The actual magnification determination submodule includes: The first rate determination unit is used to take the target charging rate information corresponding to the actual voltage upper limit range, the actual temperature upper limit range and the actual power range in the target rate table as the first charging rate information. The second rate determination unit is used to take the target charging rate information corresponding to the actual voltage upper limit range, the actual temperature lower limit range and the actual power range in the target rate table as the second charging rate information; The third rate determination unit is used to take the target charging rate information corresponding to the actual voltage lower limit range, the actual temperature upper limit range and the actual power range in the target rate table as the third charging rate information. The fourth rate determination unit is used to take the target charging rate information corresponding to the actual voltage lower limit range, the actual temperature lower limit range, and the actual power range in the target rate table as the fourth charging rate information; The actual charging rate determination unit is used to select the actual charging rate information from the first charging rate information, the second charging rate information, the third charging rate information, and the fourth charging rate information.

10. A vehicle, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the method as described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the method as described in any one of claims 1-8.

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