Battery energy efficiency test method and system and storage medium

Abstract

The invention relates to a battery energy efficiency test method and system and a storage medium, and the method comprises the steps: carrying out the charging and discharging preprocessing of an initial test battery based on a first preset rate, and confirming the preprocessed initial test battery as a corrected test battery; and carrying out charging and discharging test on the corrected test battery based on the first preset rate to obtain the charging power and the discharging power, and obtaining the energy efficiency of the corresponding to-be-tested battery according to the charging power and the discharging power, thereby realizing accurate test on the energy efficiency of the battery. Before the energy efficiency test, the battery is preprocessed by using the first preset rate of the energy efficiency, so that the battery state before the energy efficiency test does not influence the test result, the error of the battery energy efficiency test is reduced, the accuracy of the energy efficiency test result is improved, and the actual energy efficiency of the battery can be truly reflected.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery energy efficiency testing method, system, and storage medium. Background Technology

[0002] Battery energy efficiency (EE) is a core indicator that measures the energy conversion efficiency during battery charging and discharging, reflecting the efficiency of battery energy conversion and utilization. Battery energy efficiency testing is an important means of evaluating the energy conversion capability of a battery system. By measuring the energy loss during battery charging and discharging, it reflects the energy utilization efficiency of the battery in actual use.

[0003] Currently, existing battery energy efficiency testing processes contain certain errors, resulting in low accuracy of energy efficiency test results that cannot truly reflect the actual energy efficiency of the battery. Summary of the Invention

[0004] Based on this, a battery energy efficiency testing method, system, and storage medium are provided.

[0005] In a first aspect, this application provides a battery energy efficiency testing method, comprising the following steps: The initial test battery is pre-processed by charging and discharging based on the first preset rate, and the pre-processed initial test battery is identified as the corrected test battery. The modified test battery is charged and discharged based on the first preset rate to obtain the charging power and discharging power. Based on the charging power and discharging power, the energy efficiency of the corresponding test battery is obtained.

[0006] In one embodiment, the step of performing charge-discharge pre-processing on the initial test battery based on a first preset rate, and confirming the pre-processed initial test battery as a corrected test battery includes: Based on the first preset rate and preset SOC, the initial test battery is charged, and the initial test battery charged to the preset SOC is identified as the first charging test battery. Based on the first preset rate, the first charging test battery is discharged until it is in a depleted state, and the depleted first charging test battery is identified as the correction test battery.

[0007] In one embodiment, the step of discharging the first charging test battery based on a first preset rate until the first charging test battery is in a depleted state includes: Based on the first preset rate and preset discharge voltage, the first charging test battery is discharged until it is discharged to the preset discharge voltage, confirming that the first charging test battery is in an empty state.

[0008] In one embodiment, prior to the step of discharging the first charging test battery based on a first preset rate, the following steps are included: The first charging test battery is left idle for a first preset time; After confirming the first charging test battery, which is in a depleted state, as the corrective test battery, the following steps are included: The battery was left to stand for a second preset time during the test.

[0009] In one embodiment, the step of performing a charge-discharge test on the modified test battery based on a first preset rate to obtain the charging power and discharging power includes: Based on the first preset rate and preset charging voltage, the modified test battery is charged, the power of the modified test battery charged to the preset charging voltage is detected to obtain the charging power, and the modified test battery charged to the preset charging voltage is identified as the second charging test battery. Based on the first preset rate and preset discharge voltage, the second charging test battery is discharged, and the power of the second charging test battery discharged to the preset discharge voltage is detected to obtain the charging power.

[0010] In one embodiment, the step of performing power detection on a corrected test battery charged to a preset charging voltage includes: The second charging test battery is left to stand for a third preset time; After performing power detection on the second charge test battery discharged to a preset discharge voltage, the following steps are included: The second charging test battery, which has been discharged to a preset discharge voltage, is left to stand for a fourth preset time.

[0011] In one embodiment, prior to the step of performing charge-discharge pretreatment on the initial test battery based on a first preset rate, the following steps are included: Perform a battery capacity test on the battery under test, and confirm the battery under test after the capacity test as the initial test battery.

[0012] In one embodiment, the step of performing a battery capacity test on the battery under test and confirming the battery under test after the capacity test as the initial test battery includes: Based on the second preset rate and the preset charging voltage, the battery under test is charged, and the battery under test charged to the preset charging voltage is placed for a fifth preset time. The battery under test placed for the fifth preset time is identified as the third charging test battery. Based on the second preset rate and the preset discharge voltage, the third charging test battery is discharged, and the third charging test battery discharged to the preset discharge voltage is placed for a sixth preset time. The third charging test battery placed for the sixth preset time is identified as the initial test battery.

[0013] Secondly, this application also provides a battery energy efficiency testing system, including a testing device and a detection module. The testing device is connected to the detection module, and the testing device is used to perform the steps of the battery energy efficiency testing method described above.

[0014] Thirdly, this application also provides a computer storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the battery energy efficiency testing method described above.

[0015] One of the above technical solutions has the following advantages and beneficial effects: In the aforementioned battery energy efficiency testing method, the initial test battery is pre-processed by charging and discharging at a first preset rate, and the pre-processed initial test battery is identified as a corrected test battery. The corrected test battery is then charged and discharged at the first preset rate to obtain charging power and discharging power. Based on the charging power and discharging power, the energy efficiency of the corresponding battery under test is obtained, thus achieving accurate testing of battery energy efficiency. This application, by pre-processing the battery with a first preset rate of energy efficiency before energy efficiency testing, ensures that the battery state before energy efficiency testing does not affect the test results, thereby reducing errors in battery energy efficiency testing, improving the accuracy of energy efficiency test results, and truly reflecting the actual energy efficiency of the battery. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the application environment of the battery energy efficiency testing method in the embodiments of this application; Figure 2 This is a schematic diagram of the first process of the battery energy efficiency testing method in the embodiments of this application; Figure 3 This is a flowchart illustrating the initial test battery charge / discharge pretreatment steps in an embodiment of this application. Figure 4 This is a flowchart illustrating the charging and discharging power testing steps in an embodiment of this application. Figure 5 This is a schematic diagram of the second process of the battery energy efficiency testing method in the embodiments of this application; Figure 6 This is a flowchart illustrating the battery capacity confirmation steps in an embodiment of this application. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] In addition, the term "multiple" should mean two or more.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] The battery energy efficiency testing method provided in this application can be applied to, for example... Figure 1 The application environment shown is illustrated. The battery energy efficiency testing system includes a testing device 102 and a detection module 104. The testing device 102 is connected to the detection module 104. The detection module 104 can detect the charging signal of the corrected test battery after a charging test and transmit the charging signal to the testing device 102. The detection module 104 is also used to detect the discharge signal of the corrected test battery after a discharging test and transmit the discharge signal to the testing device 102. The testing device 102 is used to perform charge-discharge preprocessing on the initial test battery based on a first preset rate, and confirm the preprocessed initial test battery as the corrected test battery. It then performs charge-discharge tests on the corrected test battery based on the first preset rate to obtain the charging power and discharging power, and obtains the energy efficiency of the corresponding battery under test based on the charging power and discharging power. The testing device 102 is also used to receive the charging signal and discharging signal transmitted by the detection module 104 after performing charge-discharge tests on the corrected test battery, and process the charging signal and discharging signal to obtain the corresponding charging power and discharging power.

[0022] In one embodiment, such as Figure 2As shown, a battery energy efficiency testing method is also provided, applied to... Figure 1 Taking the aforementioned testing equipment as an example, the battery energy efficiency testing method includes the following steps: Step S210: Perform charge and discharge pre-processing on the initial test battery based on the first preset rate, and confirm the pre-processed initial test battery as the corrected test battery.

[0023] The first preset rate refers to the rate at which the energy efficiency is tested; this rate can be preset by the system. For example, the first preset rate could be 1C, 0.6C, or 0.4C. The initial test battery refers to the battery whose capacity has been confirmed. It should be noted that the battery can be a lithium-ion battery. A battery can consist of a single cell; a battery can also consist of multiple cells connected in series and / or parallel.

[0024] For example, after the system is powered on and initialized, the operator can manually set the first preset rate to 1C, and then perform charging pre-processing on the initial test battery based on the 1C rate, and then perform discharging pre-processing on the initial test battery after charging pre-processing based on the 1C rate. The initial test battery after discharging pre-processing is then identified as the corrected test battery. This achieves the goal of adjusting the state of the battery before the energy efficiency test to the state after processing at the same rate, ensuring that the battery is pre-processed using the energy efficiency test rate before the energy efficiency test, and ensuring that the battery state before the energy efficiency test does not affect the test results.

[0025] Step S220: Perform charge and discharge tests on the modified test battery based on the first preset rate to obtain the charging power and discharging power, and obtain the energy efficiency of the corresponding test battery based on the charging power and discharging power.

[0026] Among them, charging power refers to the charging signal obtained after charging the modified test battery and processing it; discharging power refers to the discharging signal obtained after discharging the modified test battery and processing it.

[0027] For example, a first preset charging rate of 1C is set. A charging test is performed on the modified test battery based on this 1C rate. After charging, the charging signal (e.g., charging voltage signal) of the modified test battery is acquired and processed to obtain the corresponding charging power. A discharging test is then performed on the modified test battery after the charging test at the 1C rate. After discharging, the discharging signal (e.g., discharging voltage signal) of the modified test battery is acquired and processed to obtain the corresponding discharging power. By comparing the charging power and the discharging power, the energy efficiency of the battery under test is obtained.

[0028] In the above embodiments, the initial test battery is pre-processed by charging and discharging based on a first preset rate, and the pre-processed initial test battery is identified as a corrected test battery. The corrected test battery is then charged and discharged based on the first preset rate to obtain charging power and discharging power. Based on the charging power and discharging power, the energy efficiency of the corresponding battery under test is obtained, thus achieving accurate testing of the battery's energy efficiency. This application, by pre-processing the battery using a first preset rate of energy efficiency before energy efficiency testing, ensures that the battery's state before the energy efficiency test does not affect the test results, thereby reducing errors in battery energy efficiency testing, improving the accuracy of energy efficiency test results, and truly reflecting the actual energy efficiency of the battery.

[0029] In one embodiment, the step of performing charge-discharge pre-processing on the initial test battery based on a first preset rate, and then identifying the pre-processed initial test battery as a corrected test battery includes: Step S310: Based on the first preset rate and preset SOC, charge the initial test battery, and confirm the initial test battery charged to the preset SOC as the first charging test battery.

[0030] The preset SOC can be obtained from system presets. For example, the preset SOC value can range from 2% SOC to 100% SOC.

[0031] For example, the initial test battery is charged to a preset SOC at a constant power based on a first preset rate, and the initial test battery charged to the preset SOC is identified as the first charging test battery; or, the initial test battery is charged to a preset SOC at a constant current based on a first preset rate, and the initial test battery charged to the preset SOC is identified as the first charging test battery. This ensures that the battery is in a reasonable state before the energy efficiency test. That is, it is necessary to ensure that the battery is discharged at the first preset rate in a non-empty state when the energy efficiency test is conducted based on the first preset rate, so as to improve the accuracy of the energy efficiency test results.

[0032] Step S320: Based on the first preset rate, discharge the first charging test battery until the first charging test battery is in an empty state, and confirm the first charging test battery in the empty state as the correction test battery.

[0033] Among them, the empty state refers to the state in which the battery is fully discharged.

[0034] For example, the first charging test battery is discharged at a constant power rate until it is in a depleted state, and the depleted first charging test battery is identified as the correction test battery; or, the first charging test battery is discharged at a constant current rate until it is in a depleted state, and the depleted first charging test battery is identified as the correction test battery. This adjusts the state of the battery before the energy efficiency test to the state after processing at the same rate, ensuring that the battery is pre-processed using the energy efficiency test rate before the energy efficiency test, and ensuring that the battery is in the same depleted state before the energy efficiency test, so that the battery state before the energy efficiency test will not affect the test results.

[0035] In one embodiment, the step of discharging the first charging test battery based on a first preset rate until the first charging test battery is in a depleted state includes: Based on the first preset rate and preset discharge voltage, the first charging test battery is discharged until it is discharged to the preset discharge voltage, confirming that the first charging test battery is in an empty state.

[0036] The preset discharge voltage can be determined according to the battery model; for example, the preset discharge voltage can be set to 2.5V.

[0037] For example, the first charging test battery is discharged at a constant power to a preset discharge voltage based on a first preset rate, and it is confirmed that the first charging test battery discharged to the preset discharge voltage is in an empty state; or, the first charging test battery is discharged at a constant current to a preset discharge voltage based on a first preset rate, and it is confirmed that the first charging test battery discharged to the preset discharge voltage is in an empty state. Then, the first charging test battery in the empty state is identified as the correction test battery. This achieves pre-processing of the battery using the energy efficiency test rate before the energy efficiency test, while ensuring that the battery is in the same empty state before the energy efficiency test, so as to ensure that the battery state before the energy efficiency test will not affect the test results, thereby improving the accuracy of the energy efficiency test results.

[0038] In one example, prior to the step of discharging the first charging test battery based on a first preset rate, the following steps are included: The battery is left unused for a first preset time during the first charging test.

[0039] The first preset time can be determined based on the magnitude of the first preset multiplier. For example, when the value range of the first preset multiplier is greater than 0 and less than 0.5C, the first preset time can be set to 30 minutes; when the value range of the first preset multiplier is greater than or equal to 0.5 and less than 1C, the first preset time can be set to 60 minutes; when the value range of the first preset multiplier is greater than or equal to 1C, the first preset time can be set to 120 minutes.

[0040] For example, the initial test battery is charged with constant power or constant current based on a first preset rate. When the battery is charged to a preset SOC, the initial test battery is left to stand for a first preset time. That is, the first preset time is completed before the first charged test battery is discharged, so as to ensure that the temperature of the battery returns to the ambient temperature after charging and before discharging, and to avoid the battery being affected by temperature, which would reduce the accuracy of the test.

[0041] In one example, after identifying the first charging test battery, which is in a depleted state, as the corrective test battery, the following steps are included: The battery was left to stand for a second preset time during the test.

[0042] The second preset time can be determined based on the magnitude of the first preset multiplier, and the second preset time can be set to be the same as the first preset time.

[0043] For example, the first charging test battery is discharged at constant power or constant current based on a first preset rate. When the first charging test battery is discharged to the point of being empty, the confirmed corrected test battery is left to stand for a second preset time to ensure that the temperature returns to the ambient temperature after the battery is discharged and before the energy efficiency test, so as to avoid the battery being affected by temperature and thus reducing the test accuracy.

[0044] In one embodiment, such as Figure 4 As shown, the steps for performing charge and discharge tests on the corrected test battery based on a first preset rate to obtain the charging power and discharging power include: Step S410: Based on the first preset rate and preset charging voltage, charge the correction test battery, perform power detection on the correction test battery charged to the preset charging voltage to obtain the charging power, and confirm the correction test battery charged to the preset charging voltage as the second charging test battery.

[0045] The second charging test battery refers to the battery obtained after charging the modified test battery.

[0046] For example, if the first preset charging rate is 1C and the preset charging voltage is 3.65V, then the correction test battery is charged to 3.65V by constant power or constant current based on the 1C charging rate. When the battery is charged to 3.65V, the power of the correction test battery is detected to obtain the charging power. The correction test battery charged to 3.65V is then identified as the second charging test battery.

[0047] Step S420: Based on the first preset rate and preset discharge voltage, discharge the second charging test battery, and perform power detection on the second charging test battery that has been discharged to the preset discharge voltage to obtain the charging power.

[0048] For example, if the first preset rate is 1C and the preset discharge voltage is 2.5V, then the modified test battery is discharged to 2.5V with constant power or constant current based on the 1C rate. When the battery is discharged to 2.5V, the power of the second charging test battery is detected to obtain the discharge power. Then, by processing the ratio of the charging power and the discharge power, the energy efficiency of the corresponding battery under test can be obtained. This reduces the error of the battery energy efficiency test, improves the accuracy of the energy efficiency test results, and can truly reflect the actual energy efficiency of the battery.

[0049] In one example, the step of performing power detection on a corrected test battery charged to a preset charging voltage includes: The second charging test battery is left to stand for a third preset time.

[0050] The third preset time can be determined based on the magnitude of the first preset multiplier. For example, if the first preset multiplier is greater than 0 and less than 0.5C, the third preset time can be set to 30 minutes; if the first preset multiplier is greater than or equal to 0.5 and less than 1C, the third preset time can be set to 60 minutes; if the first preset multiplier is greater than or equal to 1C, the third preset time can be set to 120 minutes.

[0051] For example, the modified test battery is charged to a preset charging voltage by constant power or constant current based on a first preset rate. When the battery is charged to the preset charging voltage, the modified test battery charged to the preset charging voltage is identified as the second charging test battery. The second charging test battery is left to stand for a third preset time to allow the battery temperature to return to the ambient temperature. The power of the second charging test battery after standing for the third preset time is detected to obtain the charging power.

[0052] In one example, the step of performing power detection on a second charge test battery discharged to a preset discharge voltage includes: The second charging test battery, which has been discharged to a preset discharge voltage, is left to stand for a fourth preset time.

[0053] The fourth preset time can be determined based on the magnitude of the first preset multiplier. For example, if the first preset multiplier is greater than 0 and less than 0.5C, the fourth preset time can be set to 30 minutes; if the first preset multiplier is greater than or equal to 0.5 and less than 1C, the fourth preset time can be set to 60 minutes; if the first preset multiplier is greater than or equal to 1C, the fourth preset time can be set to 120 minutes.

[0054] For example, the second charging test battery is discharged to a preset discharge voltage using constant power or constant current based on a first preset rate. When the battery is discharged to the preset discharge voltage, it is left to stand for a fourth preset time to allow the battery temperature to return to the ambient temperature. Then, the power of the second charging test battery after standing for the fourth preset time is detected to obtain the discharge power. By processing the ratio of the charging power and the discharge power, the energy efficiency of the corresponding battery under test is obtained, which further improves the accuracy of the energy efficiency test results and can truly reflect the actual energy efficiency of the battery.

[0055] In one embodiment, such as Figure 5 As shown, a battery energy efficiency testing method is also provided, applied to... Figure 1 Taking the aforementioned testing equipment as an example, the battery energy efficiency testing method includes the following steps: Step S510: Perform a battery capacity test on the battery to be tested, and confirm the battery to be tested after the capacity test as the initial test battery.

[0056] Among them, the capacity response rate varies for different models or types of batteries under test.

[0057] For example, the battery under test is charged and discharged under preset conditions to perform a battery capacity test, and then the battery under test after the capacity test is identified as the initial test battery.

[0058] Step S520: Perform charge and discharge pre-processing on the initial test battery based on the first preset rate, and confirm the pre-processed initial test battery as the corrected test battery.

[0059] For a detailed explanation of step S520, please refer to the description of the above embodiments, which will not be repeated here.

[0060] Step S530: Perform charge and discharge tests on the corrected test battery based on the first preset rate to obtain the charging power and discharging power, and obtain the energy efficiency of the corresponding test battery based on the charging power and discharging power.

[0061] For a detailed explanation of step S530, please refer to the description of the above embodiments, which will not be repeated here.

[0062] In the above embodiments, by performing a capacity confirmation test on the battery to be tested before the energy efficiency test, and then pre-processing the battery using a first preset energy efficiency ratio, it is ensured that the battery state before the energy efficiency test will not affect the test results, thereby reducing the error of the battery energy efficiency test, improving the accuracy of the energy efficiency test results, and truly reflecting the actual energy efficiency of the battery.

[0063] In one embodiment, such as Figure 6 As shown, the steps for performing a battery capacity test on the battery under test and confirming the battery under test after the capacity test as the initial test battery include: Step S610: Based on the second preset rate and preset charging voltage, charge the battery under test, place the battery under test charged to the preset charging voltage for a fifth preset time, and confirm the battery under test placed for the fifth preset time as the third charging test battery.

[0064] The second preset multiplier is a multiplier of the capacity of the battery being tested. It should be noted that the second preset multiplier for capacity response varies between different products. For example, the second preset multiplier could be 1C, 0.6C, or 0.4C. The fifth preset time can be determined based on the magnitude of the second preset multiplier. For example, if the second preset multiplier is greater than 0 and less than 0.5C, the fifth preset time can be set to 30 minutes; if the second preset multiplier is greater than or equal to 0.5C and less than 1C, the fifth preset time can be set to 60 minutes; and if the second preset multiplier is greater than or equal to 1C, the fifth preset time can be set to 120 minutes.

[0065] For example, the second preset rate is set to 0.4C. Based on the 0.4C rate, the battery under test is charged to a preset charging voltage using constant power or constant current. The battery under test charged to the preset charging voltage is then left to stand for a fifth preset time, allowing the voltage and temperature after charging to return to the ambient temperature. The battery under test left to stand for the fifth preset time is then identified as the third charging test battery.

[0066] Step S620: Based on the second preset rate and the preset discharge voltage, discharge the third charging test battery, place the third charging test battery that has been discharged to the preset discharge voltage for a sixth preset time, and confirm the third charging test battery that has been placed for the sixth preset time as the initial test battery.

[0067] The sixth preset time can be determined based on the magnitude of the second preset multiplier. For example, the sixth preset time can be the same as the fifth preset time.

[0068] For example, the second preset rate is 0.4C. Based on the 0.4C rate, the third charging test battery is discharged at constant power or constant current to a preset discharge voltage. The third charging test battery that has been discharged to the preset discharge voltage is then placed for a sixth preset time to allow the voltage and temperature after discharge to return to the ambient temperature. The battery under test that has been placed for the sixth preset time is then identified as the initial test battery, thereby realizing the capacity confirmation test of the battery under test.

[0069] It should be understood that, although Figures 2 to 6 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 2 to 6 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0070] In one embodiment, a battery energy efficiency testing device is provided, comprising: The preprocessing unit is used to perform charge-discharge preprocessing on the initial test battery based on a first preset rate, and to identify the preprocessed initial test battery as a corrected test battery.

[0071] The energy efficiency testing unit is used to perform charge and discharge tests on the modified test battery based on a first preset rate to obtain the charging power and discharging power, and to obtain the energy efficiency of the corresponding battery under test based on the charging power and discharging power.

[0072] Specific limitations regarding the battery energy efficiency testing device can be found in the limitations of the battery energy efficiency testing method described above, and will not be repeated here. Each module in the aforementioned battery energy efficiency testing device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware within or independently of the testing equipment in the battery energy efficiency testing system, or stored in software within the memory of the battery energy efficiency testing system, so that the testing equipment can call and execute the corresponding operations of each module.

[0073] In one embodiment, such as Figure 1 As shown, a battery energy efficiency testing system is also provided, including a testing device 102 and a detection module 104. The testing device 102 is connected to the detection module 104, and the testing device 102 is used to perform the steps of the battery energy efficiency testing method described above.

[0074] For a detailed description of the testing equipment 102 and the detection module 104, please refer to the description of the above embodiments, which will not be repeated here.

[0075] Based on the connection of the testing device 102 and the detection module 104, the testing device 102 performs charge-discharge preprocessing on the initial test battery based on a first preset rate, and confirms the preprocessed initial test battery as a corrected test battery. The testing device 102 performs charge-discharge tests on the corrected test battery based on the first preset rate. The detection module 104 detects the charging and discharging signals of the corrected test battery and transmits the charging and discharging signals to the testing device 102. Then, the testing device 102 obtains the charging power and discharging power based on the charging and discharging signals, and obtains the energy efficiency of the corresponding battery under test based on the charging power and discharging power, thereby achieving accurate testing of the battery's energy efficiency. This application, by preprocessing the battery with a first preset rate of energy efficiency before the energy efficiency test, ensures that the battery state before the energy efficiency test will not affect the test results, thereby reducing the error of the battery energy efficiency test, improving the accuracy of the energy efficiency test results, and truly reflecting the actual energy efficiency of the battery.

[0076] In one embodiment, a computer storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the battery energy efficiency testing method described above.

[0077] For example, when a computer program is executed by a processor, it performs the following steps: The initial test battery is pre-processed by charging and discharging based on the first preset rate, and the pre-processed initial test battery is identified as the corrected test battery. The corrected test battery is then charged and discharged based on the first preset rate to obtain the charging power and discharging power. Based on the charging power and discharging power, the energy efficiency of the corresponding test battery is obtained.

[0078] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the division operations described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), direct memory bus RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for testing battery energy efficiency, characterized in that, Includes the following steps: The initial test battery is pre-processed by charging and discharging based on the first preset rate, and the pre-processed initial test battery is identified as the corrected test battery. The modified test battery is charged and discharged based on the first preset rate to obtain the charging power and discharging power, and the energy efficiency of the corresponding test battery is obtained based on the charging power and the discharging power.

2. The battery energy efficiency testing method according to claim 1, characterized in that, The step of performing charge-discharge pre-processing on the initial test battery based on a first preset rate, and then confirming the pre-processed initial test battery as a corrected test battery includes: Based on the first preset rate and preset SOC, the initial test battery is charged, and the initial test battery charged to the preset SOC is identified as the first charging test battery. Based on the first preset rate, the first charging test battery is discharged until it is in a depleted state, and the depleted first charging test battery is identified as the corrected test battery.

3. The battery energy efficiency testing method according to claim 2, characterized in that, The step of discharging the first charging test battery based on the first preset rate until the first charging test battery is in a depleted state includes: Based on the first preset rate and preset discharge voltage, the first charging test battery is discharged until it discharges to the preset discharge voltage, confirming that the first charging test battery is in an empty state.

4. The battery energy efficiency testing method according to claim 3, characterized in that, Before the step of discharging the first charging test battery based on the first preset rate, the following steps are included: The first charging test battery is left idle for a first preset time; The step of identifying the first charging test battery, which is in a depleted state, as the corrected test battery includes: The modified test battery is left to stand for a second preset time.

5. The battery energy efficiency testing method according to claim 1, characterized in that, The step of performing a charge-discharge test on the modified test battery based on the first preset rate to obtain the charging power and discharging power includes: Based on the first preset rate and preset charging voltage, the modified test battery is charged, the power of the modified test battery charged to the preset charging voltage is detected, the charging power is obtained, and the modified test battery charged to the preset charging voltage is identified as the second charging test battery. Based on the first preset rate and preset discharge voltage, the second charging test battery is discharged, and the power of the second charging test battery discharged to the preset discharge voltage is detected to obtain the charging power.

6. The battery energy efficiency testing method according to claim 5, characterized in that, Before the step of performing power detection on the corrected test battery charged to a preset charging voltage, the following steps are included: The second charging test battery is left idle for a third preset time; Following the step of performing power detection on the second charging test battery discharged to a preset discharge voltage, the following steps are included: The second charging test battery, which has been discharged to a preset discharge voltage, is left to stand for a fourth preset time.

7. The battery energy efficiency testing method according to any one of claims 1 to 6, characterized in that, Before the step of performing charge-discharge pretreatment on the initial test battery based on a first preset rate, the following steps are included: Perform a battery capacity test on the battery under test, and confirm the battery under test after the capacity test as the initial test battery.

8. The battery energy efficiency testing method according to claim 7, characterized in that, The step of performing a battery capacity test on the battery to be tested and confirming the battery to be tested after the capacity test as the initial test battery includes: Based on the second preset rate and the preset charging voltage, the battery under test is charged, and the battery under test charged to the preset charging voltage is placed for a fifth preset time. The battery under test placed for the fifth preset time is identified as the third charging test battery. Based on the second preset rate and preset discharge voltage, the third charging test battery is discharged, and the third charging test battery discharged to the preset discharge voltage is placed for a sixth preset time. The third charging test battery placed for the sixth preset time is identified as the initial test battery.

9. A battery energy efficiency testing system, characterized in that, The device includes a testing device and a detection module, wherein the testing device is connected to the detection module, and the testing device is used to perform the steps of the battery energy efficiency testing method according to any one of claims 1 to 8.

10. A computer storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the battery energy efficiency testing method according to any one of claims 1 to 8.

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