Charging control method, control device, control system and storage medium

Abstract

The invention discloses a charging control method, a charging control device, a charging control system and a computer readable storage medium. The charging control method comprises the steps that a plurality of maximum charging current rates of a tested battery in a plurality of different battery temperatures and a plurality of different SOC intervals are acquired to determine a first charging strategy and a second charging strategy, and the charging rate of the first charging strategy is larger than that of the second charging strategy; acquiring the current battery temperature of the current battery; and according to the current battery temperature, the maximum charging current rate in the first charging strategy or the second charging strategy is determined to be adopted to charge the current battery. Therefore, the current battery can be charged by adopting the proper maximum charging current rate, the fast charging time is shortened as far as possible, the rapid temperature rise caused by the overlarge charging current rate is avoided, and the lithium precipitation problem caused by the fast charging temperature difference is further avoided.

Description

Technical Field

[0001] The present application relates to the technical field of battery charging, and in particular to a charging control method, a charging control device, a charging control system and a computer-readable storage medium. Background Art

[0002] With the development of power electronics technology, the demand for fast charging time of new energy vehicles is increasing rapidly. When the battery system enters the fast charging process, due to the large charging current rate, a large amount of heat will be generated, causing the temperature to rise sharply. The thermal management system cools the battery cell by bonding the cold plate to the battery cell, which will cause the temperature of the pole ears at both ends of the battery cell to be high and the temperature close to the cold plate to be low. At this time, lithium is easily deposited at the pole ears at both ends in the low SOC range, and lithium is easily deposited on the cold plate side in the high SOC range. At present, an effective charging strategy has not been formulated to avoid the problem of lithium deposition caused by the temperature difference of fast charging. Summary of the invention

[0003] The embodiments of the present application provide a charging control method, a charging control device, a charging control system and a computer-readable storage medium to solve at least one of the above-mentioned technical problems.

[0004] The charging control method of the embodiment of the present application includes:

[0005] Acquire multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy;

[0006] Get the current battery temperature of the current battery;

[0007] According to the current battery temperature, it is determined to adopt the maximum charging current ratio in the first charging strategy or the second charging strategy to charge the current battery.

[0008] In some embodiments, obtaining a plurality of maximum charging current rates of the test battery at a plurality of different battery temperatures and a plurality of different SOC intervals to determine the first charging strategy and the second charging strategy includes:

[0009] Obtaining the corresponding relationship between multiple charging current rates and multiple different negative parameter potentials of the test battery at each battery temperature and each SOC interval;

[0010] According to the corresponding relationship, the maximum charging current ratio corresponding to the multiple different negative parameter potentials is obtained by fitting;

[0011] For a plurality of different battery temperatures and a plurality of different SOC intervals, a plurality of corresponding maximum charging current multiples are obtained to determine a first charging strategy and a second charging strategy.

[0012] In some implementations, obtaining the current battery temperature of the current battery includes:

[0013] Get multiple regional temperatures corresponding to different regions of the current battery;

[0014] The step of determining, according to the current battery temperature, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0015] Obtaining a minimum regional temperature among the multiple regional temperatures;

[0016] When the minimum area temperature is not in the predetermined fast charging temperature range, it is determined to charge the current battery using the maximum charging current rate in the first charging strategy.

[0017] In some implementations, obtaining the current battery temperature of the current battery includes:

[0018] Get multiple regional temperatures corresponding to different regions of the current battery;

[0019] The step of determining, according to the current battery temperature, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0020] Obtaining a minimum regional temperature among the multiple regional temperatures;

[0021] When the minimum zone temperature is within a predetermined fast-charging temperature interval, calculating a temperature difference according to the multiple zone temperatures;

[0022] According to the temperature difference, it is determined to adopt the maximum charging current ratio in the first charging strategy or the second charging strategy to charge the current battery.

[0023] In some embodiments, determining, based on the temperature difference, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0024] Determining the temperature difference interval in which the temperature difference lies;

[0025] When the temperature difference is within a first temperature difference interval, it is determined to charge the current battery using the maximum charging current ratio in the first charging strategy.

[0026] In some embodiments, determining, based on the temperature difference, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0027] Determining the temperature difference interval in which the temperature difference lies;

[0028] When the temperature difference is in the second temperature difference interval, determining whether the current ambient temperature is in the corresponding ambient temperature interval;

[0029] When the current ambient temperature is within the corresponding ambient temperature range, it is determined to use the maximum charging current ratio in the first charging strategy to charge the current battery.

[0030] In some embodiments, the second temperature difference interval includes a first sub-temperature difference interval and a second sub-temperature difference interval, the ambient temperature interval includes a first ambient temperature interval and a second ambient temperature interval, and when the temperature difference is in the second temperature difference interval, determining whether the current ambient temperature is in the corresponding ambient temperature interval includes:

[0031] When the temperature difference is within the first sub-temperature difference interval, determining whether the current ambient temperature is within the first ambient temperature interval;

[0032] When the temperature difference is within the second sub-temperature difference interval, determining whether the current ambient temperature is within the second ambient temperature interval;

[0033] When the current ambient temperature is within the corresponding ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery includes:

[0034] When the current ambient temperature is within the first ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery;

[0035] When the current ambient temperature is within the second ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery;

[0036] The second sub-temperature difference interval is higher than the first sub-temperature difference interval, and the second ambient temperature interval is higher than the first ambient temperature interval.

[0037] In some embodiments, determining, based on the temperature difference, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0038] Determining the temperature difference interval in which the temperature difference lies;

[0039] When the temperature difference is within a third temperature difference interval, it is determined to use the maximum charging current ratio in the second charging strategy to charge the current battery.

[0040] In some embodiments, before determining whether the current ambient temperature is within the corresponding ambient temperature range, the charging control method further includes:

[0041] The current ambient temperature is determined according to an average value of the temperatures of the plurality of regions when the current battery is initially charged.

[0042] In some embodiments, the charging control method further includes:

[0043] Obtaining a current SOC range of the current battery;

[0044] The determining to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0045] Determine to use the maximum charging current rate corresponding to the minimum area temperature and the current SOC interval in the first charging strategy or the second charging strategy to charge the current battery.

[0046] The charging control device of the embodiment of the present application includes:

[0047] A first acquisition module is used to acquire multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy;

[0048] A second acquisition module is used to acquire the current battery temperature of the current battery;

[0049] A determination module is used to determine, according to the current battery temperature, to adopt the maximum charging current ratio in the first charging strategy or the second charging strategy to charge the current battery.

[0050] The charging control system of the embodiment of the present application includes one or more processors and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the charging control method of any of the above embodiments is implemented.

[0051] The computer-readable storage medium of the embodiment of the present application stores a computer program thereon, and when the program is executed by a processor, the charging control method of any of the above embodiments is implemented.

[0052] The charging control method, charging control device, charging control system and computer-readable storage medium of the embodiment of the present application obtain multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to formulate a first charging strategy and a second charging strategy, so as to subsequently determine the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery according to the current battery temperature. In this way, the current battery can be charged with a suitable maximum charging current rate, the fast charging time can be shortened as much as possible, and the temperature can be avoided from rising sharply due to excessive charging current rate, thereby avoiding the lithium precipitation problem caused by the fast charging temperature difference.

[0053] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0055] Figure 1 is a flow chart of a charging control method in certain embodiments of the present application;

[0056] Figure 2 is a flow chart of a charging control method in certain embodiments of the present application;

[0057] Figure 3 is a schematic diagram of the relationship between the negative reference potential and the charging current rate in certain embodiments of the present application;

[0058] Figure 4 is a flow chart of a charging control method in certain embodiments of the present application;

[0059] Figure 5 is a flow chart of a charging control method in certain embodiments of the present application;

[0060] Figure 6 is a flow chart of a charging control method in certain embodiments of the present application;

[0061] Figure 7 is a flow chart of a charging control method in certain embodiments of the present application;

[0062] Figure 8 is a flow chart of a charging control method in certain embodiments of the present application;

[0063] Fig. 9 is a flow chart of a charging control method in certain embodiments of the present application;

[0064] Fig.10 is a flow chart of a charging control method in certain embodiments of the present application;

[0065] Fig.11 is a flow chart of a charging control method in certain embodiments of the present application;

[0066] Fig.12 is a flow chart of a charging control method in certain embodiments of the present application;

[0067] Fig.13 is a flow chart of a charging control method in certain embodiments of the present application;

[0068] Fig.14 is a module schematic diagram of a charging control device in certain embodiments of the present application;

[0069] Fig.15 is a module schematic diagram of a charging control system of certain embodiments of the present application;

[0070] Fig.16 It is a schematic diagram of the connection status between a computer-readable storage medium and a processor in certain embodiments of the present application.

[0071] Description of reference numerals:

[0072] The charging control device 100 , the first acquisition module 10 , the second acquisition module 20 , the determination module 30 , the charging control system 200 , the processor 210 , the memory 220 , the computer-readable storage medium 300 , the computer program 310 , and the processor 320 . DETAILED DESCRIPTION

[0073] The following is a further description of the embodiments of the present application in conjunction with the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements or elements with the same or similar functions from beginning to end. In addition, the embodiments of the present application described below in conjunction with the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the present application.

[0074] See also Figure 1 , the charging control method of the embodiment of the present application includes:

[0075] 010: Obtain multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy;

[0076] 020: Get the current battery temperature of the current battery;

[0077] 030: Determine, according to the current battery temperature, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery.

[0078] The charging control method of the embodiment of the present application obtains multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to formulate a first charging strategy and a second charging strategy, so as to subsequently determine the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery according to the current battery temperature. In this way, the current battery can be charged with a suitable maximum charging current rate, the fast charging time can be shortened as much as possible, and the temperature can be avoided from rising sharply due to excessive charging current rate, thereby avoiding the lithium plating problem caused by the fast charging temperature difference (the fast charging temperature difference will make the current density unevenly distributed, and the negative electrode of the battery will undergo lithium plating reaction).

[0079] Specifically, in 010, multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals are obtained to determine the first charging strategy and the second charging strategy. Multiple different battery temperatures include, for example, 6 temperature points of 5°C, 10°C, 15°C, 25°C, 35°C, and 45°C. SOC interval, that is, the battery remaining power percentage (State of Charge) interval. Multiple different SOC intervals include, for example, 0-20%, 20-40%, 40-60%, 60-80%, 80-90%, and 90-95%, a total of 6 intervals. The test battery has a corresponding maximum charging current rate at each battery temperature and each SOC interval, and the test battery has corresponding multiple maximum charging current rates at multiple different battery temperatures and multiple different SOC intervals. The first charging strategy and the second charging strategy can be formulated based on multiple different battery temperatures, multiple different SOC intervals, and corresponding multiple maximum charging current rates.

[0080] Among them, the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy. In other words, when the battery temperature and SOC range are the same, the maximum charging current rate in the first charging strategy is greater than the maximum charging current rate in the second charging strategy, so that the charging rate of the first charging strategy is faster, while the charging of the second charging strategy is safer. The first charging strategy and the second charging strategy can respectively adapt to the charging needs under different conditions.

[0081] In 020, the current battery temperature of the current battery is obtained. It can be understood that during the charging process of the current battery, the current battery temperature changes because the charging generates heat. Therefore, it is necessary to monitor the current battery temperature of the current battery in real time to select a suitable maximum charging current rate from the formulated first charging strategy and the second charging strategy for charging. In one example, an NTC temperature sensor, i.e., a negative temperature coefficient (Negative Temperature Coefficient) temperature sensor, can be used to collect the current battery temperature of the current battery.

[0082] In 030, according to the current battery temperature, it is determined to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery. For example, when the current battery temperature is low or moderate, the maximum charging current rate in the first charging strategy with a faster charging rate can be selected to charge the current battery to shorten the charging time; when the current battery temperature is high, the maximum charging current rate in the second charging strategy with a slower charging rate can be selected to charge the current battery to prevent the battery from overheating.

[0083] The charging control method of the embodiment of the present application is based on the current battery temperature, and can dynamically select the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery. It can effectively control the temperature rise of the battery during the charging process, reduce battery overheating and lithium precipitation caused by fast charging, thereby improving the safety of the charging process, and maximize the charging efficiency, shorten the charging time, and has strong flexibility.

[0084] The charging control method of the embodiment of the present application can be widely applied to different types of battery cells, including blade, soft-pack and other ternary, iron-lithium batteries, etc. It has universal applicability and does not require the introduction of other components. It only relies on system control to determine the maximum charging current rate in the first charging strategy or the second charging strategy. The design is simple and there is no cost increase.

[0085] See also Figure 2 In some embodiments, obtaining a plurality of maximum charging current ratios of the test battery at a plurality of different battery temperatures and a plurality of different SOC intervals to determine a first charging strategy and a second charging strategy (ie, 010) includes:

[0086] 011: Obtain the corresponding relationship between multiple charging current rates and multiple different negative parameter potentials of the test battery at each battery temperature and each SOC interval;

[0087] 012: According to the corresponding relationship, the maximum charging current ratio corresponding to multiple different negative parameter potentials is obtained by fitting;

[0088] 013: For a plurality of different battery temperatures and a plurality of different SOC intervals, obtain a plurality of corresponding maximum charging current ratios to determine a first charging strategy and a second charging strategy.

[0089] In the implementation mode of the present application, when obtaining the maximum charging current rate, multiple charging current rates corresponding to multiple different negative parameter potentials of the test battery at each battery temperature and each SOC range are taken into consideration, and then the maximum charging current rate that different negative parameter potentials can withstand can be calculated by fitting a straight line.

[0090] First, three electrodes are pre-embedded in the battery cell to accurately monitor the electrochemical process inside the battery, especially the change in negative parameter potential, that is, the change in negative electrode potential. For the aforementioned multiple different battery temperatures of 5°C, 10°C, 15°C, 25°C, 35°C, and 45°C, and multiple different SOC intervals of 0-20%, 20-40%, 40-60%, 60-80%, 80-90%, and 90-95%, multi-stage current charging is performed at each battery temperature and each SOC interval, multiple different negative parameter potentials are collected, and multiple current density tests are performed to obtain the corresponding relationship between multiple charging current rates and multiple different negative parameter potentials. Figure 3 As shown, the horizontal axis represents the charging current rate, the vertical axis represents the negative reference potential, the battery temperature is 45°C, and different dotted lines represent different SOC intervals. From right to left, the 6 dotted lines represent the SOC intervals of 0-20%, 20-40%, 40-60%, 60-80%, 80-90%, and 90-95%, respectively. Figure 3 It can be transformed into the following Table 1.

[0091] Table 1

[0092]

[0093] Taking Table 1 as an example, for a battery temperature of 45 degrees, an SOC interval of 0%-20%, and multiple charging current rates corresponding to multiple different negative reference potentials of 30mV, 0mV, and -30mV are 5.63C, 7.04C, and 8.44C, respectively. Therefore, the maximum charging current rate corresponding to multiple different negative reference potentials of 30mV, 0mV, and -30mV can be fitted. The maximum charging current rate can be determined based on multiple charging current rates of 5.63C, 7.04C, and 8.44C. For example, 7.04C is selected as the maximum charging current rate from multiple charging current rates.

[0094] For another example, for a battery temperature of 45 degrees and an SOC range of 20-40%, multiple charging current rates corresponding to multiple different negative reference potentials of 30mV, 0mV, and -30mV are 3.53C, 4.57C, and 5.60C, respectively. Therefore, the maximum charging current rate corresponding to multiple different negative reference potentials of 30mV, 0mV, and -30mV can be fitted. The maximum charging current rate can be determined based on multiple charging current rates of 3.53C, 4.57C, and 5.60C. For example, 4.57C is selected as the maximum charging current rate from multiple charging current rates.

[0095] Similarly, for multiple different battery temperatures, such as the aforementioned 5°C, 10°C, 15°C, 25°C, 35°C, and 45°C, in multiple different SOC intervals, such as the aforementioned 0-20%, 20-40%, 40-60%, 60-80%, 80-90%, and 90-95%, the corresponding multiple maximum charging current rates can be obtained. Assuming there are M different battery temperatures and N different SOC intervals, the corresponding M*N maximum charging current rates can be obtained.

[0096] Thus, it can be obtained that multiple maximum charging current rates corresponding to multiple different battery temperatures and multiple different SOC intervals are used to formulate the first charging strategy and the second charging strategy. The first charging strategy and the second charging strategy can be expressed as mappings, charts or other forms, which are not limited here. Since the first charging strategy and the second charging strategy are both determined by multiple different battery temperatures, multiple different SOC intervals, and corresponding multiple maximum charging current rates, the difference is that the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy. Therefore, at the same battery temperature and the same SOC interval, the corresponding maximum charging current rate in the first charging strategy can be set relatively high, while the corresponding maximum charging current rate in the second charging strategy can be set relatively low.

[0097] For example, at a battery temperature of 45 degrees and an SOC range of 0%-20%, the corresponding maximum charging current ratio in the first charging strategy is 7.04C, while the corresponding maximum charging current ratio in the second charging strategy is 5.63C. For another example, at a battery temperature of 45 degrees and an SOC range of 20-40%, the corresponding maximum charging current ratio in the first charging strategy is 4.57C, while the corresponding maximum charging current ratio in the second charging strategy is 3.53C.

[0098] See also Figure 4 In some embodiments, obtaining the current battery temperature (ie, 020) of the current battery includes:

[0099] 021: Get the temperatures of multiple regions corresponding to different regions of the current battery;

[0100] Determining, according to the current battery temperature, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery (ie, 030), including:

[0101] 031: Get the minimum regional temperature among multiple regional temperatures;

[0102] 032: When the minimum area temperature is not within the predetermined fast charging temperature range, determine to use the maximum charging current rate in the first charging strategy to charge the current battery.

[0103] Specifically, since the thermal management system cools the battery cell by bonding it to a cold plate, the temperature of the tabs at both ends of the battery cell will be high, and the temperature close to the cold plate will be low. Therefore, the current battery temperature in the embodiment of the present application may include multiple regional temperatures corresponding to different areas of the current battery. For example, tab temperature T1, tab temperature T2, cold plate side temperature T3, etc. The minimum regional temperature Tmin among the multiple regional temperatures is obtained, and based on whether the minimum regional temperature is in a predetermined fast charging temperature range, it is determined to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery. The battery temperature in the aforementioned 010 may refer to the overall temperature or average temperature of the test battery.

[0104] like Figure 5 For example, the predetermined fast charging temperature interval can be [25℃, 45℃]. When 25℃≤Tmin≤45℃, the minimum area temperature Tmin is in the predetermined fast charging temperature interval; when Tmin<25℃, the minimum area temperature Tmin is not in the predetermined fast charging temperature interval. It can be understood that since the battery has thermal management protection measures, the minimum area temperature Tmin is generally not greater than 45℃. Furthermore, when the minimum area temperature Tmin is not in the predetermined fast charging temperature interval, indicating that the current battery temperature is low, the maximum charging current rate in the first charging strategy MAP1 is used to charge the current battery to improve the charging efficiency and minimize the fast charging time.

[0105] It should be noted that the above-mentioned predetermined fast charging temperature range [25°C, 45°C] is only for illustrative purposes. In other examples, the predetermined fast charging temperature range may also be other numerical ranges, which is not limited here.

[0106] See also Figure 6 In some embodiments, obtaining the current battery temperature (ie, 020) of the current battery includes:

[0107] 021: Get the temperatures of multiple regions corresponding to different regions of the current battery;

[0108] Determining, according to the current battery temperature, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery (ie, 030), including:

[0109] 031: Get the minimum regional temperature among multiple regional temperatures;

[0110] 033: When the minimum zone temperature is within the predetermined fast-charging temperature range, the temperature difference is calculated based on the temperatures of multiple zones;

[0111] 034: Determine, based on the temperature difference, whether to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery.

[0112] Specifically, Figure 5 For example, the predetermined fast charging temperature range can be [25°C, 45°C]. When 25°C≤Tmin≤45°C, the minimum area temperature Tmin is in the predetermined fast charging temperature range. When the minimum area temperature Tmin is in the predetermined fast charging temperature range, it indicates that the current battery temperature is high, and it is necessary to further determine the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery based on the temperature difference between multiple area temperatures.

[0113] In one example, the temperature difference between multiple regional temperatures can be the difference between the two regional temperatures with the largest temperature difference among the multiple regional temperatures, that is, ΔT=Tmax-Tmin. According to the temperature difference ΔT, it can be determined whether to charge the current battery using the maximum charging current rate in the first charging strategy or the second charging strategy. For example, when the temperature difference ΔT is small, the maximum charging current rate in the first charging strategy with a faster charging rate can be selected to charge the current battery to shorten the fast charging time; when the temperature difference ΔT is large, the maximum charging current rate in the second charging strategy with a slower charging rate can be selected to charge the current battery to avoid lithium deposition caused by temperature difference in the battery.

[0114] See also Figure 7 In some embodiments, according to the temperature difference, determining to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery (ie, 034) includes:

[0115] 0341: Determine the temperature difference range in which the temperature difference lies;

[0116] 0342: When the temperature difference is within the first temperature difference interval, determine to use the maximum charging current rate in the first charging strategy to charge the current battery.

[0117] Specifically, Figure 5 For example, the first temperature difference interval can be (0, 10°C]. When the temperature difference ΔT≤10°C, it indicates that the current battery temperature difference is small, and the maximum charging current rate in the first charging strategy MAP1 is used to charge the current battery to improve the charging efficiency and minimize the fast charging time.

[0118] See also Figure 8 In some embodiments, according to the temperature difference, determining to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery (ie, 034) includes:

[0119] 0341: Determine the temperature difference range in which the temperature difference lies;

[0120] 0343: When the temperature difference is in the second temperature difference interval, determining whether the current ambient temperature is in the corresponding ambient temperature interval;

[0121] 0344: When the current ambient temperature is within the corresponding ambient temperature range, determine to use the maximum charging current rate in the first charging strategy to charge the current battery.

[0122] Specifically, the second temperature difference interval may be higher than the aforementioned first temperature difference interval. In one example, the second temperature difference interval may be (10°C, 20°C]. When 10°C<ΔT≤20°C, it indicates that the battery temperature difference has reached a certain level. At this time, since the temperature difference range that the battery can withstand is different under different ambient temperatures, it is necessary to further combine the ambient temperature to determine whether to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery. When the current ambient temperature is in the corresponding ambient temperature interval, the maximum charging current rate in the first charging strategy is used to charge the current battery. When the current ambient temperature is not in the corresponding ambient temperature interval, the maximum charging current rate in the second charging strategy is used to charge the current battery.

[0123] See also Fig. 9 and Fig.10 In some embodiments, the second temperature difference interval includes a first sub-temperature difference interval and a second sub-temperature difference interval. The ambient temperature interval includes a first ambient temperature interval and a second ambient temperature interval. When the temperature difference is in the second temperature difference interval, determining whether the current ambient temperature is in the corresponding ambient temperature interval (i.e., 0343) includes:

[0124] 03431: When the temperature difference is in the first sub-temperature difference interval, determine whether the current ambient temperature is in the first ambient temperature interval;

[0125] 03432: when the temperature difference is in the second sub-temperature difference interval, determine whether the current ambient temperature is in the second ambient temperature interval;

[0126] When the current ambient temperature is within the corresponding ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery (0344) includes:

[0127] 03441: When the current ambient temperature is within the first ambient temperature range, determine to use the maximum charging current rate in the first charging strategy to charge the current battery;

[0128] 03442: When the current ambient temperature is in the second ambient temperature range, determine to use the maximum charging current rate in the first charging strategy to charge the current battery;

[0129] The second sub-temperature difference interval is higher than the first sub-temperature difference interval, and the second ambient temperature interval is higher than the first ambient temperature interval.

[0130] Specifically, Figure 5 For example, the second temperature difference interval [10°C, 20°C] may include a first sub-temperature difference interval (10°C, 15°C] and a second sub-temperature difference interval (15°C, 20°C]. Correspondingly, the first ambient temperature interval is [30°C, 35°C], and the second ambient temperature interval is (35°C, 45°C]. Since the temperature difference range that the battery can withstand is different under different ambient temperatures, in the implementation manner of the present application, when the sub-temperature difference interval in which the temperature difference is located is higher, the ambient temperature interval corresponding to the current ambient temperature is also set higher.

[0131] When the temperature difference ΔT is in the first sub-temperature difference interval (10°C, 15°C], if it is further determined that the current ambient temperature T_ave is in the first ambient temperature interval [30°C, 35°C], it indicates that the current temperature difference is still within the tolerable range of the current ambient temperature, and it is determined to use the maximum charging current rate in the first charging strategy MAP1 to charge the current battery. In this way, the charging efficiency can be improved and the fast charging time can be minimized.

[0132] When the temperature difference ΔT is in the second sub-temperature difference interval [15°C, 20°C], if it is further determined that the current ambient temperature T_ave is in the second ambient temperature interval (35°C, 45°C], it indicates that the current temperature difference is also within the tolerable range of the current ambient temperature, and it is determined to use the maximum charging current rate in the first charging strategy MAP1 to charge the current battery. In this way, the charging efficiency can be improved and the fast charging time can be minimized.

[0133] In addition, when the temperature difference ΔT is in the first sub-temperature difference interval (10°C, 15°C], but it is further determined that the current ambient temperature T_ave is not in the first ambient temperature interval [30°C, 35°C], it indicates that the current temperature difference exceeds the tolerable range of the current ambient temperature, and it is determined to use the maximum charging current rate in the second charging strategy MAP2 to charge the current battery. In this way, lithium plating of the battery can be avoided.

[0134] When the temperature difference ΔT is in the second sub-temperature difference interval (15°C, 20°C], but it is further determined that the current ambient temperature T_ave is not in the second ambient temperature interval (35°C, 45°C], it indicates that the current temperature difference exceeds the tolerable range of the current ambient temperature, and it is determined to use the maximum charging current rate in the second charging strategy MAP2 to charge the current battery. In this way, lithium plating of the battery can be avoided.

[0135] See also Fig.11 In some embodiments, according to the temperature difference, determining to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery (ie, 034) includes:

[0136] 0341: Determine the temperature difference range in which the temperature difference lies;

[0137] 0345: When the temperature difference is within the third temperature difference interval, determine to use the maximum charging current rate in the second charging strategy to charge the current battery.

[0138] Specifically, the third temperature difference interval may be higher than the second temperature difference interval. Figure 5 For example, the third temperature difference interval can be (20°C, +∞]. When the temperature difference ΔT>20°C, it indicates that the current battery temperature difference is large, and the maximum charging current rate in the second charging strategy MAP2 is used to charge the current battery to avoid lithium deposition in the battery.

[0139] See also Fig.12 In some embodiments, before determining whether the current ambient temperature is within the corresponding ambient temperature range (ie, 0343), the charging control method further includes:

[0140] 040: Determine the current ambient temperature based on the average temperature of multiple areas when the current battery is initially charged.

[0141] Specifically, when the current battery just starts to charge, the battery has not yet generated heat, and due to the heat exchange between the battery and the environment when it was in a static state, the temperature of the battery tends to be consistent with the ambient temperature. In the implementation of the present application, the current ambient temperature is determined according to the average value of the temperatures of multiple regions when the current battery is initially charged, for example, the current ambient temperature T_ave = (T1+T2+T3) / 3. In this way, the temperature sensor for detecting the current ambient temperature can be omitted, and the average value of the temperatures of multiple regions can be used to avoid the inaccuracy of the current ambient temperature obtained due to uneven distribution of battery temperature.

[0142] See also Fig.13 In some embodiments, the charging control method further includes:

[0143] 050: Get the current SOC range of the current battery;

[0144] Determining to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes:

[0145] 035: Determine to use the maximum charging current rate corresponding to the minimum area temperature and the current SOC range in the first charging strategy or the second charging strategy to charge the current battery.

[0146] Specifically, the implementation method of the present application also obtains the current SOC range of the current battery. After determining to adopt the first charging strategy or the second charging strategy, the specific maximum charging current rate in the first charging strategy or the second charging strategy is determined based on the minimum area temperature and the current SOC range. In other words, for different minimum area temperatures and current SOC ranges, the maximum charging current rate in the first charging strategy or the second charging strategy also changes accordingly.

[0147] It can be understood that the first charging strategy includes multiple maximum charging current ratios corresponding to multiple different battery temperatures and multiple different SOC intervals. When determining to use the maximum charging current ratio in the first charging strategy to charge the current battery, the minimum area temperature and the current SOC interval are substituted to obtain the maximum charging current ratio corresponding to the minimum area temperature Tmin and the current SOC interval in the first charging strategy MAP1.

[0148] Similarly, the second charging strategy includes multiple maximum charging current rates corresponding to multiple different battery temperatures and multiple different SOC intervals. When determining to use the maximum charging current rate in the second charging strategy to charge the current battery, the minimum area temperature and the current SOC interval are substituted to obtain the maximum charging current rate corresponding to the minimum area temperature Tmin and the current SOC interval in the second charging strategy MAP1.

[0149] See also Fig.14 The charging control device 100 of the embodiment of the present application includes a first acquisition module 10, a second acquisition module 20 and a determination module 30. The first acquisition module 10 is used to obtain multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy. The second acquisition module 20 is used to obtain the current battery temperature of the current battery. The determination module 30 is used to determine, based on the current battery temperature, whether to charge the current battery using the maximum charging current rate in the first charging strategy or the second charging strategy.

[0150] In some embodiments, the first acquisition module 10 is specifically used to: obtain the correspondence between multiple charging current rates and multiple different negative parameter potentials for the test battery at each battery temperature and each SOC interval; obtain the maximum charging current rates corresponding to multiple different negative parameter potentials according to the corresponding relationships; and obtain the corresponding multiple maximum charging current rates for multiple different battery temperatures and multiple different SOC intervals to determine the first charging strategy and the second charging strategy.

[0151] In some embodiments, the second acquisition module 20 is specifically used to: obtain multiple regional temperatures corresponding to different regions of the current battery. The determination module 30 is specifically used to: obtain the minimum regional temperature among the multiple regional temperatures; when the minimum regional temperature is not in the predetermined fast charging temperature range, determine to use the maximum charging current rate in the first charging strategy to charge the current battery.

[0152] In some embodiments, the second acquisition module 20 is specifically used to: obtain multiple regional temperatures corresponding to different regions of the current battery. The determination module 30 is specifically used to: obtain the minimum regional temperature among the multiple regional temperatures; when the minimum regional temperature is in a predetermined fast charging temperature range, calculate the temperature difference according to the multiple regional temperatures; and determine to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery according to the temperature difference.

[0153] In some embodiments, the determination module 30 is specifically used to: determine the temperature difference interval in which the temperature difference is located; when the temperature difference is in the first temperature difference interval, determine to use the maximum charging current rate in the first charging strategy to charge the current battery.

[0154] In some embodiments, the determination module 30 is specifically used to: determine the temperature difference range in which the temperature difference is located; when the temperature difference is in the second temperature difference range, determine whether the current ambient temperature is in the corresponding ambient temperature range; when the current ambient temperature is in the corresponding ambient temperature range, determine to use the maximum charging current rate in the first charging strategy to charge the current battery.

[0155] In some embodiments, the second temperature difference interval includes a first sub-temperature difference interval and a second sub-temperature difference interval, and the ambient temperature interval includes a first ambient temperature interval and a second ambient temperature interval. When the temperature difference is in the second temperature difference interval, the determination module 30 is specifically used to: when the temperature difference is in the first sub-temperature difference interval, determine whether the current ambient temperature is in the first ambient temperature interval; when the temperature difference is in the second sub-temperature difference interval, determine whether the current ambient temperature is in the second ambient temperature interval; when the current ambient temperature is in the first ambient temperature interval, determine to use the maximum charging current rate in the first charging strategy to charge the current battery; when the current ambient temperature is in the second ambient temperature interval, determine to use the maximum charging current rate in the first charging strategy to charge the current battery; wherein, the second sub-temperature difference interval is higher than the first sub-temperature difference interval, and the second ambient temperature interval is higher than the first ambient temperature interval.

[0156] In some embodiments, the determination module 30 is specifically used to: determine the temperature difference interval in which the temperature difference is located; when the temperature difference is in the third temperature difference interval, determine to use the maximum charging current rate in the second charging strategy to charge the current battery.

[0157] In some embodiments, the determination module 30 is specifically used to: before determining whether the current ambient temperature is within the corresponding ambient temperature range, determine the current ambient temperature according to an average value of temperatures of multiple regions during initial charging of the current battery.

[0158] In some embodiments, the second acquisition module 20 is further used to: acquire the current SOC interval of the current battery. The determination module 30 is specifically used to: determine to charge the current battery using the maximum charging current ratio corresponding to the minimum area temperature and the current SOC interval in the first charging strategy or the second charging strategy.

[0159] It should be noted that the explanation of the charging control method in the aforementioned embodiment is also applicable to the charging control device 100 in the embodiment of the present application, and will not be elaborated here.

[0160] See also Fig.15 The charging control system 200 of the embodiment of the present application includes one or more processors 210 and a memory 220. The memory 220 stores a computer program. When the computer program is executed by the processor 210, the charging control method of any of the above embodiments is implemented.

[0161] For example, when the computer program is executed by the processor 210, the following charging control method is implemented:

[0162] 010: Obtain multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy;

[0163] 020: Get the current battery temperature of the current battery;

[0164] 030: Determine, according to the current battery temperature, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery.

[0165] For another example, when the computer program is executed by the processor 210, the following charging control method is implemented:

[0166] 011: Obtain the corresponding relationship between multiple charging current rates and multiple different negative parameter potentials of the test battery at each battery temperature and each SOC interval;

[0167] 012: According to the corresponding relationship, the maximum charging current ratio corresponding to multiple different negative parameter potentials is obtained by fitting;

[0168] 013: For a plurality of different battery temperatures and a plurality of different SOC intervals, obtain a plurality of corresponding maximum charging current ratios to determine a first charging strategy and a second charging strategy.

[0169] It should be noted that the explanation of the charging control method in the aforementioned embodiment is also applicable to the charging control system 200 of the embodiment of the present application, and will not be elaborated here.

[0170] See also Fig.16 The computer-readable storage medium 300 of the embodiment of the present application stores a computer program 310 thereon, and when the program is executed by the processor 320, the charging control method of any of the above-mentioned embodiments is implemented.

[0171] For example, when the program is executed by the processor 320, the following charging control method is implemented:

[0172] 010: Obtain multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy;

[0173] 020: Get the current battery temperature of the current battery;

[0174] 030: Determine, according to the current battery temperature, to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery.

[0175] For another example, when the program is executed by the processor 320, the following charging control method is implemented:

[0176] 011: Obtain the corresponding relationship between multiple charging current rates and multiple different negative parameter potentials of the test battery at each battery temperature and each SOC interval;

[0177] 012: According to the corresponding relationship, the maximum charging current ratio corresponding to multiple different negative parameter potentials is obtained by fitting;

[0178] 013: For a plurality of different battery temperatures and a plurality of different SOC intervals, obtain a plurality of corresponding maximum charging current ratios to determine a first charging strategy and a second charging strategy.

[0179] It should be noted that the explanation of the charging control method in the aforementioned embodiment is also applicable to the computer-readable storage medium 300 in the embodiment of the present application, and will not be elaborated here.

[0180] In summary, the charging control method, charging control device 100, charging control system 200 and computer-readable storage medium 300 of the embodiment of the present application obtain multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to formulate a first charging strategy and a second charging strategy, so as to subsequently determine the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery according to the current battery temperature. In this way, the current battery can be charged with a suitable maximum charging current rate, the fast charging time can be shortened as much as possible, and the temperature can be avoided from rising sharply due to excessive charging current rate, thereby avoiding the lithium plating problem caused by the fast charging temperature difference.

[0181] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0182] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0183] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a computer-readable storage medium can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0184] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0185] A person of ordinary skill in the art will appreciate that all or part of the steps carried by the method for implementing the above-mentioned embodiment can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment. In addition, each functional unit in each embodiment of the present application can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The above-mentioned storage medium can be a read-only memory, a disk or an optical disk, etc.

[0186] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A charging control method, characterized in that: include: Acquire multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy; Get the current battery temperature of the current battery; According to the current battery temperature, it is determined to adopt the maximum charging current ratio in the first charging strategy or the second charging strategy to charge the current battery.

2. The charging control method according to claim 1, characterized in that: The method of obtaining a plurality of maximum charging current ratios of the test battery at a plurality of different battery temperatures and a plurality of different SOC intervals to determine a first charging strategy and a second charging strategy includes: Obtaining the corresponding relationship between multiple charging current rates and multiple different negative parameter potentials of the test battery at each battery temperature and each SOC interval; According to the corresponding relationship, the maximum charging current ratio corresponding to the multiple different negative parameter potentials is obtained by fitting; For a plurality of different battery temperatures and a plurality of different SOC intervals, a plurality of corresponding maximum charging current multiples are obtained to determine a first charging strategy and a second charging strategy.

3. The charging control method according to claim 1, characterized in that: The obtaining of the current battery temperature of the current battery includes: Get multiple regional temperatures corresponding to different regions of the current battery; The step of determining, according to the current battery temperature, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes: Obtaining a minimum regional temperature among the multiple regional temperatures; When the minimum area temperature is not in the predetermined fast charging temperature range, it is determined to charge the current battery using the maximum charging current rate in the first charging strategy.

4. The charging control method according to claim 1, characterized in that: The obtaining of the current battery temperature of the current battery includes: Get multiple regional temperatures corresponding to different regions of the current battery; The step of determining, according to the current battery temperature, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes: Obtaining a minimum regional temperature among the multiple regional temperatures; When the minimum zone temperature is within a predetermined fast-charging temperature interval, calculating a temperature difference according to the multiple zone temperatures; According to the temperature difference, it is determined to adopt the maximum charging current ratio in the first charging strategy or the second charging strategy to charge the current battery.

5. The charging control method according to claim 4, characterized in that: The step of determining, according to the temperature difference, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery comprises: Determining the temperature difference interval in which the temperature difference lies; When the temperature difference is within a first temperature difference interval, it is determined to charge the current battery using the maximum charging current ratio in the first charging strategy.

6. The charging control method according to claim 4, characterized in that: The step of determining, according to the temperature difference, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery comprises: Determining the temperature difference interval in which the temperature difference lies; When the temperature difference is in the second temperature difference interval, determining whether the current ambient temperature is in the corresponding ambient temperature interval; When the current ambient temperature is within the corresponding ambient temperature range, it is determined to use the maximum charging current ratio in the first charging strategy to charge the current battery.

7. The charging control method according to claim 6, characterized in that: The second temperature difference interval includes a first sub-temperature difference interval and a second sub-temperature difference interval, the ambient temperature interval includes a first ambient temperature interval and a second ambient temperature interval, and when the temperature difference is in the second temperature difference interval, determining whether the current ambient temperature is in the corresponding ambient temperature interval includes: When the temperature difference is within the first sub-temperature difference interval, determining whether the current ambient temperature is within the first ambient temperature interval; When the temperature difference is within the second sub-temperature difference interval, determining whether the current ambient temperature is within the second ambient temperature interval; When the current ambient temperature is within the corresponding ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery includes: When the current ambient temperature is within the first ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery; When the current ambient temperature is within the second ambient temperature range, determining to use the maximum charging current rate in the first charging strategy to charge the current battery; The second sub-temperature difference interval is higher than the first sub-temperature difference interval, and the second ambient temperature interval is higher than the first ambient temperature interval.

8. The charging control method according to claim 4, characterized in that: The step of determining, according to the temperature difference, to adopt the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery comprises: Determining the temperature difference interval in which the temperature difference lies; When the temperature difference is within a third temperature difference interval, it is determined to use the maximum charging current ratio in the second charging strategy to charge the current battery.

9. The charging control method according to claim 6, characterized in that: Before determining whether the current ambient temperature is within the corresponding ambient temperature range, the charging control method further includes: The current ambient temperature is determined according to an average value of the temperatures of the plurality of regions when the current battery is initially charged.

10. The charging control method according to any one of claims 3 to 9, characterized in that: The charging control method further includes: Obtaining a current SOC range of the current battery; The determining to use the maximum charging current rate in the first charging strategy or the second charging strategy to charge the current battery includes: Determine to use the maximum charging current rate corresponding to the minimum area temperature and the current SOC interval in the first charging strategy or the second charging strategy to charge the current battery.

11. A charging control device, characterized in that: include: A first acquisition module is used to acquire multiple maximum charging current rates of the test battery at multiple different battery temperatures and multiple different SOC intervals to determine a first charging strategy and a second charging strategy, wherein the charging rate of the first charging strategy is greater than the charging rate of the second charging strategy; A second acquisition module is used to acquire the current battery temperature of the current battery; A determination module is used to determine, according to the current battery temperature, to adopt the maximum charging current ratio in the first charging strategy or the second charging strategy to charge the current battery.

12. A charging control system, characterized in that: The charging control system includes one or more processors and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the charging control method according to any one of claims 1 to 10 is implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the charging control method described in any one of claims 1 to 10 is implemented.

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