Battery charging parameter testing method, device, testing equipment and readable storage medium

Abstract

The embodiments of the present application provide a battery charging parameter testing method, device, test equipment and readable storage medium, which relate to the field of battery technology. Through the embodiments of the present application, during the cyclic charge and discharge test of the battery, the real-time charging current can be determined based on the charging matrix to be tested and the real-time battery cell temperature. In this way, even if the temperature of the battery cell changes during the charging process, the embodiments of the present application can also change the charging current in time according to the changed battery cell temperature, so that the entire cyclic charge and discharge test process conforms to the actual usage scenario. In other words, a charging matrix that conforms to the actual usage scenario can be obtained through the embodiments of the present application. Furthermore, the charging matrix obtained by the test of the embodiments of the present application can effectively improve the charging efficiency of the battery while ensuring the safety of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery charging parameter testing method, apparatus, testing equipment, and readable storage medium. Background Art

[0002] With the increasing awareness of environmental protection and the development of new energy technologies, traditional energy is gradually being replaced by new energy. For example, using electricity instead of fuel can effectively reduce carbon emissions.

[0003] Currently, rechargeable batteries can be used to power devices. Take lithium batteries as an example. Lithium batteries are rechargeable batteries that can continuously provide energy for devices through repeated charge and discharge cycles.

[0004] However, due to the highly reactive chemical properties of lithium metal, lithium batteries have high environmental requirements during use. Especially during charging, different battery cell temperatures require different charging currents. Therefore, ensuring charging efficiency while ensuring safety is a pressing issue. Summary of the Invention

[0005] In view of this, the embodiments of the present application provide a battery charging parameter testing method, apparatus, testing equipment and readable storage medium, so that the charging matrix obtained by the test can meet the actual usage scenario and effectively improve the battery charging efficiency while ensuring battery safety.

[0006] In a first aspect, a battery charging parameter testing method is provided, the method being applied to a testing device, the method comprising:

[0007] Obtaining a charging matrix to be tested, wherein the charging matrix to be tested includes a correspondence between power information, battery cell temperature, and charging current;

[0008] Performing cyclic charging and discharging on the battery according to the charging matrix to be tested, wherein the cyclic charging and discharging includes a charging process and a discharging process; and

[0009] determining a test result in response to the number of cycles of the cyclic charge and discharge reaching a predetermined value;

[0010] The charging process includes:

[0011] Determining a real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and

[0012] The battery cell is charged according to the real-time charging current.

[0013] In a second aspect, a battery charging parameter testing system is provided, the system comprising:

[0014] battery cells; and

[0015] The test equipment is configured to perform the following steps:

[0016] Obtaining a charging matrix to be tested, wherein the charging matrix to be tested includes a correspondence between power information, battery cell temperature, and charging current;

[0017] Performing cyclic charging and discharging on the battery according to the charging matrix to be tested, wherein the cyclic charging and discharging includes a charging process and a discharging process; and

[0018] determining a test result in response to the number of cycles of the cyclic charge and discharge reaching a predetermined value;

[0019] The charging process includes:

[0020] Determining a real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and

[0021] The battery cell is charged according to the real-time charging current.

[0022] In a third aspect, a battery charging parameter testing device is provided, wherein the method is applied to a testing device, and the device comprises:

[0023] An acquisition module is used to acquire a charging matrix to be tested, wherein the charging matrix to be tested includes a correspondence between power information, battery cell temperature and charging current;

[0024] a charge and discharge module, configured to perform cyclic charge and discharge on the battery according to the charging matrix to be tested, wherein the cyclic charge and discharge includes a charging process and a discharging process; and

[0025] a test result determination module, configured to determine a test result in response to the number of cycles of the cyclic charge and discharge reaching a predetermined value;

[0026] Wherein, the charging and discharging module includes:

[0027] a real-time charging current determination module, configured to determine the real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and

[0028] A charging module is used to charge the battery cell according to the real-time charging current.

[0029] In a fourth aspect, an embodiment of the present application provides a testing device comprising a memory and a processor, wherein the memory is used to store one or more computer program instructions, wherein the one or more computer program instructions are executed by the processor to implement the method described in the first aspect.

[0030] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the method described in the first aspect is implemented.

[0031] In a sixth aspect, an embodiment of the present application provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the method described in the first aspect.

[0032] Through the embodiment of the present application, during the cyclic charge and discharge test of the battery, the real-time charging current can be determined based on the charging matrix to be tested and the real-time battery cell temperature. In this way, even if the temperature of the battery cell changes during the charging process, the embodiment of the present application can timely change the charging current based on the changed battery cell temperature, so that the entire cyclic charge and discharge test process conforms to the actual usage scenario. In other words, through the embodiment of the present application, a charging matrix that conforms to the actual usage scenario can be obtained. Furthermore, the charging matrix obtained through the test of the embodiment of the present application can effectively improve the charging efficiency of the battery while ensuring battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other objects, features and advantages of the embodiments of the present application will become more apparent through the following description of the embodiments of the present application with reference to the accompanying drawings, in which:

[0034] Figure 1 A schematic diagram of a charging matrix according to an embodiment of the present application;

[0035] Figure 2 A schematic diagram of a battery charging parameter testing system according to an embodiment of the present application;

[0036] Figure 3 This is a flow chart of a battery charging parameter testing method according to an embodiment of the present application;

[0037] Figure 4 A schematic diagram of another charging matrix according to an embodiment of the present application;

[0038] Figure 5 A schematic structural diagram of a battery charging parameter testing device provided in an embodiment of the present application;

[0039] Figure 6 A schematic diagram of the structure of a test device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The present application is described below based on the following embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. To avoid obscuring the essence of the present application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0041] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0042] Unless the context clearly requires otherwise, words like “include”, “comprising” and the like in the specification should be interpreted as including rather than exclusive or exhaustive; that is, as “including but not limited to”.

[0043] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0044] When charging a battery, in order to protect the battery from loss, an appropriate charging current should be used to charge the battery. However, if a smaller current is used to charge the battery, the efficiency of the battery charging will be affected.

[0045] Taking lithium batteries as an example, if the charging current is too low, it will affect the charging efficiency of the lithium battery. If the charging current is too high, it will cause lithium plating. Lithium plating refers to a loss condition in lithium-ion batteries that reduces the safety of lithium batteries. Specifically, lithium plating refers to the irreversible deposition of metallic lithium on the surface of the lithium battery anode.

[0046] In addition, the charging current threshold at which lithium plating occurs in lithium batteries varies at different temperatures and under different states of charge. Therefore, how to ensure charging safety while ensuring charging efficiency is an urgent problem that needs to be solved.

[0047] Currently, in related technologies, the charging current is generally determined by the ambient temperature and a pre-set charging matrix, wherein the charging matrix generally includes the correspondence between power information, temperature, and charging current.

[0048] Specifically, as shown in Table 1 below, Table 1 is an example of a charging matrix according to an embodiment of the present application, specifically as follows:

[0049] Table 1

[0050]

[0051]

[0052] T represents temperature, and SOC (State of Charge) represents the state of charge. Specifically, SOC is the ratio of the battery's remaining available capacity to its total available capacity. C represents the charging current, and its unit is discharge rate (C). The discharge rate represents the battery's charge and discharge capabilities. In practical applications, discharge rate = discharge current / rated capacity.

[0053] As shown in Table 1, which shows the appropriate charging current at different temperatures and states of charge, the charging current can be determined according to the charging matrix shown in Table 1. Testing the reliability of the charging current in the charging matrix is ​​crucial for ensuring charging efficiency and safety.

[0054] In related technologies, the commonly used testing method is to perform charge and discharge cycle tests on battery cells at different ambient temperatures using the corresponding charging current in the charging matrix. If lithium plating occurs in the lithium battery, it proves that the charging matrix is ​​unreasonable; otherwise, it proves that the charging matrix is ​​reasonable.

[0055] However, since the temperature of the battery cell itself will gradually increase during the charging process, testing only by the charging current determined by the ambient temperature will affect the test results to a certain extent. Figure 1 As shown, Figure 1 Schematic diagram of a charging matrix according to an embodiment of the present application, including a charging matrix 11 and a dotted line 12 representing a charging path.

[0056] like Figure 1 As shown, during the related art testing of the charging matrix 11 , if the current ambient temperature is −5° C., the related art will adopt the charging path shown by the dotted line 12 to charge the battery.

[0057] That is, in the related art, the corresponding charging current is searched in the charging matrix 11 according to the charge state of the battery and the ambient temperature of -5°C to charge the battery.

[0058] However, since the temperature of the battery cell itself will gradually increase during the charging process, the temperature of the battery cell will be higher than the ambient temperature, which will make the test process not suitable for actual use scenarios.

[0059] For example, in the charging matrix 11, the charging current corresponding to -5°C and 50% state of charge is 0.13C. However, due to the increase in the temperature of the battery cell itself, the temperature of the battery cell may have risen to -4°C. At this time, the charging current applicable to the battery cell should be 0.19C. However, the relevant technology will still charge the battery with a charging current of 0.13C.

[0060] Therefore, in the related art, the charging path shown by the dotted line 12 may cause the test process to be inconsistent with the actual usage scenario, thereby affecting the reliability of the test results.

[0061] In order to solve the above problems, an embodiment of the present application provides a battery charging parameter testing system so that the testing process conforms to the actual usage scenario.

[0062] Specifically, such as Figure 2 As shown, Figure 2 Schematic diagram of a battery charging parameter testing system according to an embodiment of the present application, wherein the schematic diagram includes: a battery cell 21 and a testing device 22 .

[0063] In the embodiment of the present application, the battery cell 21 may be a lithium battery cell. In a preferred embodiment, one or more temperature sensors may be provided on or within the battery cell 21. Through the temperature sensors, the test device 22 can obtain the real-time cell temperature of the battery cell 21.

[0064] If a plurality of temperature sensors are provided on the surface or inside the battery cell 21 , the testing device 22 may determine the real-time cell temperature of the battery cell 21 according to the temperature data sent by each temperature sensor.

[0065] Specifically, in a preferred embodiment, the process of determining the real-time battery cell temperature can be performed as follows: determining the candidate battery cell temperatures output by each temperature sensor, and then determining the candidate battery cell temperature with the largest value among the candidate battery cell temperatures as the real-time battery cell temperature.

[0066] In another preferred embodiment, the process of determining the real-time battery cell temperature can be performed as follows: determining the candidate battery cell temperatures output by each temperature sensor, and then determining the candidate battery cell temperature with the smallest value among the candidate battery cell temperatures as the real-time battery cell temperature.

[0067] In another preferred embodiment, the process of determining the real-time battery cell temperature may be performed as follows: determining the candidate battery cell temperatures output by each temperature sensor, and then determining the average value of the candidate battery cell temperatures as the real-time battery cell temperature.

[0068] Through the above-mentioned various implementation methods, the embodiment of the present application can select an applicable real-time battery cell temperature determination method according to actual conditions, thereby increasing the applicability of the system.

[0069] On the one hand, the test device 22 can obtain the real-time cell temperature of the battery cell 21. On the other hand, the test device 22 can also be used to cyclically charge and discharge the battery cell 21, and change the real-time charging current of the battery cell 21 based on the charging matrix to be tested and the real-time cell temperature of the battery cell 21.

[0070] Specifically, such as Figure 3 As shown, the test device 22 can be configured to perform the following steps:

[0071] In step 31, a charging matrix to be tested is obtained.

[0072] The charging matrix to be tested includes the corresponding relationship between power information, battery cell temperature and charging current.

[0073] Specifically, Figure 1 The charging matrix shown can be a charging matrix to be tested. In the embodiment of the present application, if Figure 1 The charging matrix shown is the charging matrix to be tested, then Figure 1 T in the equation is the cell temperature. Figure 1 The SOC in it is the power information.

[0074] In addition, the parameters in the charging matrix to be measured may also be other types of parameters. For example, the power information in the charging matrix to be measured may also be voltage.

[0075] In step 32, the battery is cyclically charged and discharged according to the charging matrix to be tested.

[0076] The cyclic charge and discharge includes a charging process and a discharging process. Specifically, the charging process can be performed as follows: determining a real-time charging current based on at least the charging matrix to be measured and the real-time battery cell temperature, and then charging the battery cell according to the real-time charging current.

[0077] That is to say, during the process of testing the battery cell in the embodiment of the present application, if the temperature of the battery cell changes, the testing equipment can determine the real-time charging current in the charging matrix to be tested based on the changed battery cell temperature (i.e., the real-time battery cell temperature), so that the testing process is more in line with the actual usage scenario.

[0078] For example, Figure 4 As shown, Figure 4 This is a schematic diagram of another charging matrix according to an embodiment of the present application, which includes a charging matrix 41 to be tested and a dotted line 42 representing a charging path.

[0079] like Figure 4As shown, in the embodiment of the present application, during the test of the charging matrix 41 to be tested, the test equipment can adjust the charging current of the battery cells in real time. For example, in the embodiment of the present application, the initial temperature is -5°C and the initial SOC is 0%. At this time, the test equipment will use a current of 0.19 to charge the battery cells.

[0080] As the remaining charge (i.e., SOC) and cell temperature of the battery cell increase, when the SOC of the battery cell reaches 20% and the real-time cell temperature reaches -4°C, the test equipment will use a current of 0.24C to charge the battery cell. Therefore, through the embodiment of the present application, even if the SOC and cell temperature of the battery cell change during the charging process, the embodiment of the present application can also timely change the charging current according to the changed SOC and cell temperature, making the test process more consistent with actual usage scenarios.

[0081] If necessary, Figure 4 As shown, even if only the SOC of the battery cell changes or only the temperature of the battery cell changes, the test equipment can adjust the real-time charging current according to the charging matrix 41 to be tested.

[0082] In a preferred embodiment, if the power information in the charging matrix to be tested is voltage, the above-mentioned step of determining the real-time charging current based on at least the charging matrix to be tested and the real-time battery cell temperature can be specifically performed as follows: determining the real-time voltage and real-time battery cell temperature of the battery cell, and then determining the real-time charging current in the charging matrix to be tested based on the real-time battery cell temperature and the real-time voltage.

[0083] In the embodiment of the present application, the charging matrix to be tested can represent the corresponding relationship between voltage, battery cell temperature, and charging current. Furthermore, after the test equipment determines the real-time voltage and real-time battery cell temperature of the battery cell, the charging current of the battery cell can be adjusted according to the real-time voltage and real-time battery cell temperature.

[0084] In another preferred embodiment, if the power information in the charging matrix to be tested is the state of charge, the above-mentioned step of determining the real-time charging current based on at least the charging matrix to be tested and the real-time battery cell temperature can be specifically performed as follows: determining the real-time voltage and real-time battery cell temperature of the battery cell, and then determining the real-time state of charge of the battery cell based on the real-time voltage, and then determining the real-time charging current in the charging matrix to be tested based on the real-time battery cell temperature and the real-time state of charge.

[0085] In the embodiment of the present application, the charging matrix to be tested can represent the corresponding relationship between the state of charge, battery cell temperature, and charging current. Furthermore, after the test equipment determines the real-time voltage of the battery cell, it can first determine the real-time state of charge of the battery cell (i.e., the real-time remaining power of the battery cell) based on the real-time voltage of the battery cell, and then adjust the charging current of the battery cell based on the real-time state of charge and the real-time battery cell temperature.

[0086] Through the above implementation, the power information in the charging matrix to be tested can be either voltage or charge state. Furthermore, the testing equipment can directly adjust the real-time charging current based on the real-time voltage of the battery cell, or first determine the real-time charge state based on the real-time voltage, and then adjust the real-time charging current based on the real-time charge state, thereby increasing the adaptability of the embodiments of the present application.

[0087] In another preferred embodiment, the step of determining the real-time charging current based on at least the charging matrix to be tested and the real-time battery cell temperature may further be performed as follows: in response to the difference between the real-time battery cell temperature and the ambient temperature being greater than a predetermined temperature difference threshold, adjusting the real-time charging current to 0 until the difference between the real-time battery cell temperature and the ambient temperature is less than or equal to the predetermined temperature difference threshold. In response to the difference between the real-time battery cell temperature and the ambient temperature being less than or equal to the predetermined temperature difference threshold, determining the real-time charging current in the charging matrix to be tested based on the ambient temperature.

[0088] The predetermined temperature difference threshold may be a value greater than or equal to 0.

[0089] That is, in the embodiment of the present application, as the test device charges the battery cell for an increasing amount of time, the real-time battery cell temperature will become increasingly higher. When the real-time battery cell temperature is too high (i.e., the difference between the real-time battery cell temperature and the ambient temperature is greater than a predetermined temperature difference threshold), the test device may stop charging the battery cell (i.e., adjust the real-time charging current to 0).

[0090] Then, when the battery cell naturally cools down to a temperature similar to the ambient temperature (i.e., until the difference between the real-time battery cell temperature and the ambient temperature is less than or equal to the predetermined temperature difference threshold), the test equipment can determine the real-time charging current in the charging matrix to be tested according to the ambient temperature and recharge the battery cell.

[0091] For example, in actual applications, the predetermined temperature difference threshold can be set to 3°C. That is, when the real-time battery cell temperature exceeds the ambient temperature by 3°C, the test equipment can stop charging the battery cell. When the battery cell naturally cools down to a temperature difference of less than or equal to 3°C from the ambient temperature, the test equipment can continue charging the battery cell.

[0092] For another example, in actual applications, the predetermined temperature difference threshold may also be set to 0° C. That is, when the real-time battery cell temperature exceeds the ambient temperature, the test device may stop charging the battery cell, and when the battery cell naturally cools down to the ambient temperature, the test device may continue charging the battery cell.

[0093] Of course, the predetermined temperature difference threshold may also be other applicable values, which will not be elaborated in the embodiment of the present application.

[0094] Furthermore, in a preferred embodiment, if the power information in the charging matrix to be tested is voltage, the above-mentioned step of determining the real-time charging current in the charging matrix to be tested based on the ambient temperature can be specifically performed as follows: determining the real-time voltage of the battery cell, and then determining the real-time charging current in the charging matrix to be tested based on the ambient temperature and the real-time voltage.

[0095] In an embodiment of the present application, the charging matrix to be tested can represent the corresponding relationship between voltage, cell temperature, and charging current. Furthermore, when the test equipment determines that the difference between the real-time cell temperature of the battery cell and the ambient temperature is less than or equal to a predetermined temperature difference threshold, it indicates that the real-time cell temperature of the battery cell is substantially the same as the ambient temperature. The test equipment can then adjust the charging current of the battery cell based on the real-time voltage and ambient temperature of the battery cell.

[0096] In another preferred embodiment, if the power information in the charging matrix to be tested is the state of charge, the above-mentioned step of determining the real-time charging current in the charging matrix to be tested based on the ambient temperature can be specifically performed as follows: determining the real-time voltage of the battery cell, and then determining the real-time state of charge of the battery cell based on the real-time voltage, and then determining the real-time charging current in the charging matrix to be tested based on the ambient temperature and the real-time state of charge.

[0097] In an embodiment of the present application, the charging matrix to be tested can represent the corresponding relationship between the state of charge, the battery cell temperature, and the charging current. Furthermore, when the test equipment determines that the difference between the real-time battery cell temperature and the ambient temperature is less than or equal to a predetermined temperature difference threshold, it represents that the real-time battery cell temperature is substantially the same as the ambient temperature. Then, the test equipment can first determine the real-time state of charge of the battery cell (i.e., the real-time remaining power of the battery cell) based on the real-time voltage of the battery cell, and then adjust the charging current of the battery cell based on the real-time state of charge and the real-time battery cell temperature.

[0098] Through the above implementation, the power information in the charging matrix to be tested can be either voltage or charge state. Furthermore, the testing equipment can directly adjust the real-time charging current based on the real-time voltage of the battery cell, or first determine the real-time charge state based on the real-time voltage, and then adjust the real-time charging current based on the real-time charge state, thereby increasing the adaptability of the embodiments of the present application.

[0099] At step 33 , in response to the number of cycles of cyclic charge and discharge reaching a predetermined value, a test result is determined.

[0100] The test results can be expressed by the battery cell status. For example, if lithium deposition occurs in a lithium battery cell, the test results may include "The charging matrix under test is unusable and requires further optimization," "The charging matrix under test is inaccurate," "Lithium deposition occurs," and so on. This indicates that the current charging matrix under test is not suitable for practical applications and requires further optimization.

[0101] If the lithium battery cells do not exhibit lithium deposition, the test results may be "The tested charging matrix is ​​usable and can be further optimized," "No lithium deposition occurred," or similar. This indicates that the tested charging matrix is ​​suitable for practical applications. Further optimization and testing can be performed on the tested charging matrix, or the test can be terminated and used in the corresponding charging scenario.

[0102] Through the embodiment of the present application, during the cyclic charge and discharge test of the battery, the real-time charging current can be determined based on the charging matrix to be tested and the real-time battery cell temperature. In this way, even if the temperature of the battery cell changes during the charging process, the embodiment of the present application can timely change the charging current based on the changed battery cell temperature, so that the entire cyclic charge and discharge test process conforms to the actual usage scenario. In other words, through the embodiment of the present application, a charging matrix that conforms to the actual usage scenario can be obtained. Furthermore, the charging matrix obtained through the test of the embodiment of the present application can effectively improve the charging efficiency of the battery while ensuring battery safety.

[0103] Based on the same technical concept, the embodiment of the present application also provides a battery charging parameter testing device, such as Figure 5 As shown, the device includes: an acquisition module 51, a charge and discharge module 52 and a test result determination module 53.

[0104] An acquisition module 51 is configured to acquire a charging matrix to be measured, wherein the charging matrix to be measured includes a correspondence between power information, battery cell temperature, and charging current;

[0105] A charge and discharge module 52 is configured to perform cyclic charge and discharge on the battery according to the charging matrix to be tested, wherein the cyclic charge and discharge includes a charging process and a discharging process; and

[0106] a test result determination module 53, configured to determine a test result in response to the number of cycles of the cyclic charge and discharge reaching a predetermined value;

[0107] The charging and discharging module 52 includes:

[0108] A real-time charging current determination module 521 is configured to determine the real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and

[0109] The charging module 522 is configured to charge the battery cell according to the real-time charging current.

[0110] In some embodiments, the power information is voltage, and the real-time charging current determination module 521 is specifically configured to:

[0111] Determining the real-time voltage and real-time cell temperature of the battery cell; and

[0112] The real-time charging current is determined in the charging matrix to be tested according to the real-time battery cell temperature and the real-time voltage.

[0113] In some embodiments, the power information is the state of charge, and the real-time charging current determination module 521 is specifically configured to:

[0114] Determining the real-time voltage and real-time cell temperature of the battery cell;

[0115] determining a real-time state of charge of the battery cell according to the real-time voltage; and

[0116] The real-time charging current is determined in the charging matrix to be tested according to the real-time battery cell temperature and the real-time state of charge.

[0117] In some embodiments, the real-time charging current determination module 521 is specifically configured to:

[0118] In response to a difference between the real-time battery cell temperature and the ambient temperature being greater than a predetermined temperature difference threshold, adjusting the real-time charging current to 0 until the difference between the real-time battery cell temperature and the ambient temperature is less than or equal to the predetermined temperature difference threshold;

[0119] In response to a difference between the real-time battery cell temperature and the ambient temperature being less than or equal to a predetermined temperature difference threshold, the real-time charging current is determined in the charging matrix to be tested according to the ambient temperature.

[0120] In some embodiments, the power information is voltage, and the real-time charging current determination module 521 is specifically configured to:

[0121] determining the real-time voltage of the battery cell; and

[0122] The real-time charging current is determined in the charging matrix to be tested according to the ambient temperature and the real-time voltage.

[0123] In some embodiments, the power information is the state of charge, and the real-time charging current determination module 521 is specifically configured to:

[0124] Determining the real-time voltage of the battery cell;

[0125] determining a real-time state of charge of the battery cell according to the real-time voltage; and

[0126] The real-time charging current is determined in the charging matrix to be tested according to the ambient temperature and the real-time state of charge.

[0127] In some embodiments, a plurality of temperature sensors are provided on the surface or inside the battery cell, and the device further comprises:

[0128] A first candidate cell temperature determination module, configured to determine the candidate cell temperature output by each of the temperature sensors; and

[0129] The first real-time battery cell temperature determination module is configured to determine the candidate battery cell temperature with the largest value among the candidate battery cell temperatures as the real-time battery cell temperature.

[0130] In some embodiments, a plurality of temperature sensors are provided on the surface or inside the battery cell, and the device further comprises:

[0131] A second candidate cell temperature determination module, configured to determine the candidate cell temperature output by each of the temperature sensors; and

[0132] The second real-time battery cell temperature determination module is configured to determine the candidate battery cell temperature with the smallest value among the candidate battery cell temperatures as the real-time battery cell temperature.

[0133] In some embodiments, a plurality of temperature sensors are provided on the surface or inside the battery cell, and the device further comprises:

[0134] A third candidate cell temperature determination module is configured to determine the candidate cell temperature output by each of the temperature sensors; and

[0135] The third real-time battery cell temperature determination module is configured to determine an average value of the candidate battery cell temperatures as the real-time battery cell temperature.

[0136] Through the embodiment of the present application, during the cyclic charge and discharge test of the battery, the real-time charging current can be determined based on the charging matrix to be tested and the real-time battery cell temperature. In this way, even if the temperature of the battery cell changes during the charging process, the embodiment of the present application can timely change the charging current based on the changed battery cell temperature, so that the entire cyclic charge and discharge test process conforms to the actual usage scenario. In other words, through the embodiment of the present application, a charging matrix that conforms to the actual usage scenario can be obtained. Furthermore, the charging matrix obtained through the test of the embodiment of the present application can effectively improve the charging efficiency of the battery while ensuring battery safety.

[0137] Figure 6 Schematic diagram of the test equipment of the embodiment of the present application. Figure 6 As shown, Figure 6 The electronic device shown is a universal address query device, which includes a universal computer hardware structure, which includes at least a processor 61, a memory 62 and a charging device 67. The processor 61 and the memory 62 are connected via a bus 63. The memory 62 is suitable for storing instructions or programs executable by the processor 61. The processor 61 can be an independent microprocessor or a collection of one or more microprocessors. Thus, the processor 61 executes the instructions stored in the memory 62, thereby executing the method flow of the embodiment of the present application as described above to process data and control other devices. The bus 63 connects the above-mentioned multiple components together, and at the same time connects the above-mentioned components to the display controller 64 and the display device and the input / output (I / O) device 65. The input / output (I / O) device 65 can be a mouse, keyboard, modem, network interface, touch input device, somatosensory input device, printer and other devices known in the art. Typically, the input / output device 65 is connected to the system via an input / output (I / O) controller 66. The charging device 67 can be used to charge the battery cells, and the processor 61 can control the charging current of the charging device 67 through the bus 63 .

[0138] It will be understood by those skilled in the art that the embodiments of the present application may be provided as methods, devices (equipment), or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0139] The present application is described with reference to flowcharts of methods, apparatuses (devices), and computer program products according to embodiments of the present application. It should be understood that each process in the flowcharts can be implemented by computer program instructions.

[0140] These computer program instructions may be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 A function specified in a process or multiple processes.

[0141] These computer program instructions can also be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce the instructions for implementing the process Figure 1 A device that specifies functions in a process or multiple processes.

[0142] Another embodiment of the present application relates to a non-volatile storage medium for storing a computer-readable program, wherein the computer-readable program is used to enable a computer to execute part or all of the above method embodiments.

[0143] That is, those skilled in the art will understand that all or part of the steps in the above-mentioned embodiments can be implemented by specifying relevant hardware through a program, which is stored in a storage medium and includes a number of instructions for causing a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0144] Another embodiment of the present application relates to a computer program product, including a computer program / instruction, which can implement some or all of the above method embodiments when executed by a processor.

[0145] That is, those skilled in the art can understand that the embodiments of the present application can specify relevant hardware (including the processor itself) by executing a computer program product (computer program / instructions) through a processor, thereby implementing all or part of the steps in the above-mentioned embodiment method.

[0146] The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A battery charging parameter testing method, characterized in that: The method comprises: Obtaining a charging matrix to be tested, wherein the charging matrix to be tested includes a correspondence between power information, battery cell temperature, and charging current; Performing cyclic charging and discharging on the battery according to the charging matrix to be tested, wherein the cyclic charging and discharging includes a charging process and a discharging process; and In response to the number of cycles of the cyclic charge and discharge reaching a predetermined value, determining a test result, wherein the test result is used to indicate whether the charging matrix to be tested is suitable for practical application; The charging process includes: Determining a real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and charging the battery cell according to the real-time charging current; The power information is voltage, and determining the real-time charging current at least based on the charging matrix to be measured and the real-time battery cell temperature includes: Determining the real-time voltage and real-time cell temperature of the battery cell; and The real-time charging current is determined in the charging matrix to be tested according to the real-time battery cell temperature and the real-time voltage.

2. The method according to claim 1, characterized in that The power information is the state of charge, and determining the real-time charging current at least according to the charging matrix to be measured and the real-time battery cell temperature includes: Determining the real-time voltage and real-time cell temperature of the battery cell; determining a real-time state of charge of the battery cell according to the real-time voltage; and The real-time charging current is determined in the charging matrix to be tested according to the real-time battery cell temperature and the real-time state of charge.

3. The method according to claim 1, characterized in that The determining the real-time charging current at least according to the charging matrix to be measured and the real-time battery cell temperature includes: In response to a difference between the real-time battery cell temperature and the ambient temperature being greater than a predetermined temperature difference threshold, adjusting the real-time charging current to 0 until the difference between the real-time battery cell temperature and the ambient temperature is less than or equal to the predetermined temperature difference threshold; In response to a difference between the real-time battery cell temperature and the ambient temperature being less than or equal to a predetermined temperature difference threshold, the real-time charging current is determined in the charging matrix to be tested according to the ambient temperature.

4. The method according to claim 3, characterized in that The electric quantity information is voltage, and determining the real-time charging current in the charging matrix to be measured according to the ambient temperature includes: determining the real-time voltage of the battery cell; and The real-time charging current is determined in the charging matrix to be tested according to the ambient temperature and the real-time voltage.

5. The method according to claim 3, characterized in that The power information is the state of charge, and determining the real-time charging current in the charging matrix to be measured according to the ambient temperature includes: Determining the real-time voltage of the battery cell; determining a real-time state of charge of the battery cell according to the real-time voltage; and The real-time charging current is determined in the charging matrix to be tested according to the ambient temperature and the real-time state of charge.

6. The method according to claim 1, characterized in that A plurality of temperature sensors are provided on the surface or inside the battery cell, and the method further comprises: Determining the candidate cell temperature output by each of the temperature sensors; and Determine the candidate cell temperature with the largest value among the candidate cell temperatures as the real-time cell temperature.

7. The method according to claim 1, characterized in that A plurality of temperature sensors are provided on the surface or inside the battery cell, and the method further comprises: Determining the candidate cell temperature output by each of the temperature sensors; and Determine the candidate cell temperature with the smallest value among the candidate cell temperatures as the real-time cell temperature.

8. The method according to claim 1, characterized in that A plurality of temperature sensors are provided on the surface or inside the battery cell, and the method further comprises: Determining the candidate cell temperature output by each of the temperature sensors; and An average value of the candidate battery cell temperatures is determined as the real-time battery cell temperature.

9. A battery charging parameter testing system, characterized in that: The system comprises: battery cells; and The test equipment is configured to perform the following steps: Obtaining a charging matrix to be tested, wherein the charging matrix to be tested includes a correspondence between power information, battery cell temperature, and charging current; Performing cyclic charging and discharging on the battery according to the charging matrix to be tested, wherein the cyclic charging and discharging includes a charging process and a discharging process; and determining a test result in response to the number of cycles of the cyclic charge and discharge reaching a predetermined value; The charging process includes: Determining a real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and charging the battery cell according to the real-time charging current; The power information is voltage, and determining the real-time charging current at least based on the charging matrix to be measured and the real-time battery cell temperature includes: Determining the real-time voltage and real-time cell temperature of the battery cell; and The real-time charging current is determined in the charging matrix to be tested according to the real-time battery cell temperature and the real-time voltage.

10. A battery charging parameter testing device, characterized in that: The device comprises: An acquisition module is used to acquire a charging matrix to be tested, wherein the charging matrix to be tested includes a correspondence between power information, battery cell temperature and charging current; a charge and discharge module, configured to perform cyclic charge and discharge on the battery according to the charging matrix to be tested, wherein the cyclic charge and discharge includes a charging process and a discharging process; and a test result determination module, configured to determine a test result in response to the number of cycles of the cyclic charge and discharge reaching a predetermined value; Wherein, the charging and discharging module includes: a real-time charging current determination module, configured to determine the real-time charging current based at least on the charging matrix to be measured and the real-time battery cell temperature; and A charging module, configured to charge the battery cell according to the real-time charging current; When the power information is voltage, the real-time charging current determination module is further used to determine the real-time voltage and real-time cell temperature of the battery cell, and to determine the real-time charging current in the charging matrix to be tested based on the real-time cell temperature and the real-time voltage.

11. A test device comprising a memory and a processor, characterized in that: The memory is configured to store one or more computer program instructions, wherein the one or more computer program instructions are executed by the processor to implement the method according to any one of claims 1 to 8.

12. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

13. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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