Method, device, equipment and medium for testing equalization capability of power storage battery system

Abstract

The application relates to the technical field of testing, and discloses a method, a device, equipment and a medium for testing the equalization capability of a power storage battery system. The method comprises the following steps: performing at least one pre-test preparation operation on the power storage battery system; connecting a static test platform to the system after the pre-test preparation operation, performing a static equalization capability test operation on the power storage battery system to obtain static test data; performing at least one pre-test preparation operation on the power storage battery system again, connecting a dynamic test platform to the power storage battery system after the pre-test preparation operation, performing a dynamic equalization capability test operation on the power storage battery system to obtain dynamic test data; performing at least one post-test processing operation on the power storage battery system to obtain post-test processing data, and then outputting a system equalization performance evaluation result according to at least the static test data, the dynamic test data and the post-test processing data. The application can support equalization circuit design, control algorithm optimization and industry standard formulation.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and in particular to a method, apparatus, equipment and medium for testing the balancing capability of a power battery system. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage systems, lithium-ion power batteries, as the core energy carrier, directly determine the system's energy utilization rate, cycle life, and safety margins based on their performance consistency. In practical applications, due to factors such as manufacturing process tolerances, operating temperature gradients, and differences in charge and discharge history, inconsistencies in parameters such as voltage, capacity, and internal resistance inevitably occur between individual cells within a battery pack. This inconsistency accumulates during cyclic use, leading to the "weakest link effect"—some cells are overcharged or over-discharged, which in turn causes prominent problems such as system capacity decay and increased risk of thermal runaway.

[0003] To address consistency issues, battery management systems (BMS) need to incorporate battery balancing functionality, dynamically adjusting the state of charge between individual cells using either energy dissipation (passive balancing) or energy transfer (active balancing) circuits. However, the effectiveness of balancing strategies heavily relies on the reliability of their circuit design, the adaptability of the control algorithm, and the stability of balancing efficiency. Currently, the industry lacks standardized and systematic methods for testing and evaluating balancing performance, and the following technical challenges are prevalent:

[0004] 1. One-sided testing scenarios: Most tests only focus on the static voltage equalization speed, ignoring the impact of dynamic current and temperature changes on the equalization effect under actual operating conditions;

[0005] 2. Discrete testing platform: Existing testing equipment can often only simulate ideal battery models and cannot reproduce the equalization behavior of real battery packs under fault conditions such as aging and micro-short circuits, resulting in deviations between test results and actual vehicle performance;

[0006] 3. Lack of a standard system: There are no complete testing standards covering equalization circuits, strategies, energy efficiency and reliability at home and abroad, which restricts the iteration and industrial application of high-performance equalization technology. Summary of the Invention

[0007] The purpose of this invention is to provide a method, apparatus, equipment, and medium for testing the balancing capability of a power battery system, and to propose at least one framework for testing the balancing performance of a power battery system, providing technical support for balancing circuit design verification, control algorithm optimization, and industry standard formulation.

[0008] To address the aforementioned technical problems, in a first aspect, the present invention provides a method for testing the balancing capability of a power battery system, comprising at least:

[0009] Perform at least one pre-test preparation operation on the power battery system;

[0010] After connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, a static equalization capability test operation is performed on the power battery system to obtain static test data.

[0011] Re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, perform a dynamic balancing capability test operation on the power battery system to obtain dynamic test data;

[0012] At least one post-test processing operation is performed on the power battery system to obtain post-test processing data, and then the system balanced performance evaluation result is output based on at least the static test data, the dynamic test data and the post-test processing data.

[0013] Based on the same concept, in a second aspect, the present invention also provides a method for testing the balancing capability of a power battery system, comprising at least:

[0014] Perform at least one pre-test preparation operation on the power battery system;

[0015] After connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, a dynamic balancing capability test operation is performed on the power battery system to obtain dynamic test data.

[0016] Re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, perform a static equalization capability test operation on the power battery system to obtain static test data;

[0017] At least one post-test processing operation is performed on the power battery system to obtain post-test processing data, and then the system balanced performance evaluation result is output based on at least the static test data, the dynamic test data and the post-test processing data.

[0018] Optionally, the static testing platform and the dynamic testing platform share the same equipment;

[0019] The shared equipment includes at least a host computer, data acquisition equipment, low-voltage power supply, BMS control box, and high-voltage charging and discharging equipment;

[0020] The first end of the power battery system is connected to the high-voltage charging and discharging equipment, and the second end of the power battery system is connected to the first end of the BMS control box;

[0021] The second terminal of the BMS control box is connected to the KL15 wake-up terminal of the low-voltage power supply, the third terminal of the BMS control box is connected to the 24V output terminal of the low-voltage power supply, and the fourth terminal of the BMS control box is connected to the first terminal of the data acquisition device.

[0022] The second end of the data acquisition device is connected to the host computer.

[0023] Optionally, the system equalization performance evaluation results include at least the average static equalization current and the average dynamic equalization current of each target cell.

[0024] Optionally, the average static equalization current is calculated at least in the following ways:

[0025] I avgnJ =ΔC nJ / T J ;

[0026] In the above formula, I avgnJ The static equalization current average value, ΔC, represents the average value of the static equalization current. nJ T represents the balanced capacity of each target cell after static balancing capability testing. J Indicates the duration of static equilibrium.

[0027] Optionally, the average value of the dynamic equalization current is calculated at least in the following ways:

[0028] I avgnD =(ΔC nD -I avgnJ ×T1) / T D ;

[0029] In the above formula, I avgnD ΔC represents the average value of the dynamic equalization current. nD I represents the balanced capacity of each target cell after dynamic balancing capability testing. avgnJ T represents the average value of the static equalization current, T1 represents the preset resting time, and T D This indicates the duration of dynamic equilibrium.

[0030] Based on the same concept, in a third aspect, the present invention also provides a power battery system balancing capability testing device for performing the power battery system balancing capability testing method described in any one of the first aspects.

[0031] The equalization capability testing device for the power battery system includes at least the following:

[0032] The first pre-test preparation module is used to perform at least one pre-test preparation operation on the power battery system.

[0033] The first static test module is used to connect the static test platform to the power battery system after the pre-test preparation operation, and then perform a static equalization capability test on the power battery system to obtain static test data.

[0034] The first dynamic test module is used to re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, perform a dynamic balancing capability test operation on the power battery system to obtain dynamic test data.

[0035] The first result output module is used to perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system balanced performance evaluation result based at least on the static test data, the dynamic test data and the post-test processing data.

[0036] Based on the same concept, in a fourth aspect, the present invention also provides a power battery system balancing capability testing device for performing the power battery system balancing capability testing method described in any of the second aspects.

[0037] The equalization capability testing device for the power battery system includes at least the following:

[0038] The second pre-test preparation module is used to perform at least one pre-test preparation operation on the power battery system.

[0039] The second dynamic testing module is used to connect the dynamic testing platform to the power battery system after the pre-test preparation operation, and then perform a dynamic balancing capability test on the power battery system to obtain dynamic test data.

[0040] The second static test module is used to re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, perform a static equalization capability test operation on the power battery system to obtain static test data.

[0041] The second result output module is used to perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system balanced performance evaluation result based at least on the static test data, the dynamic test data and the post-test processing data.

[0042] Based on the same concept, in a fifth aspect, the present invention also provides an electronic device, including a memory and a processor, the memory storing a computer program executable on the processor, wherein the processor, when executing the program, implements the steps in the balancing capability test method for the power battery system of any one of the first or second aspects.

[0043] Based on the same concept, in a sixth aspect, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps in the balancing capability test method for the power battery system described in either the first or second aspect.

[0044] The technical solution provided by this invention firstly performs at least one pre-test preparation operation on the power battery system; further, after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, a static equalization capability test operation is performed on the power battery system to obtain static test data; further, at least one pre-test preparation operation is performed again on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, a dynamic equalization capability test operation is performed on the power battery system to obtain dynamic test data; finally, at least one post-test processing operation is performed on the power battery system to obtain post-test processed data, and then the system equalization performance evaluation result is output based on at least the static test data, dynamic test data, and post-test processed data. Therefore, this invention provides at least one equalization performance testing framework for power battery systems, which can provide technical support for equalization circuit design verification, control algorithm optimization, and industry standard formulation. Attached Figure Description

[0045] Figure 1 This is a flowchart of a method for testing the balancing capability of a power battery system provided in an embodiment of the present invention;

[0046] Figure 2 This is a system device connection diagram provided in an embodiment of the present invention;

[0047] Figure 3 This is a flowchart of another method for testing the balancing capability of a power battery system provided in an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the structure of a power battery system balancing capability testing device provided in an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of another power battery system balancing capability testing device provided in an embodiment of the present invention;

[0050] Figure 6This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0053] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0054] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0055] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0056] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0057] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0058] Figure 1 This is a flowchart of a method for testing the balancing capability of a power battery system according to an embodiment of the present invention. This embodiment is applicable to at least any scenario of quantitative testing and evaluation of the balancing capability of a power battery system in a new energy vehicle (e.g., an electric vehicle). The method for testing the balancing capability of a power battery system can be, but is not limited to, executed by the power battery system balancing capability testing device described in this embodiment of the present invention. This execution entity can be implemented using software and / or hardware. Figure 1 As shown, the method for testing the balancing capability of this power battery system includes at least the following steps:

[0059] S1. Perform at least one pre-test preparation operation on the power battery system.

[0060] Among them, the pre-test preparation operations can be set according to the actual adaptability of the vehicle.

[0061] In one specific implementation, step S1 is configured at least as follows:

[0062] (1-1) Perform a constant-capacity test on the power battery system and record the constant-capacity result as Q0; further, charge the power battery system to the preset charging cut-off condition according to the preset charging mechanism (the preset charging mechanism can be negotiated and formulated with the manufacturer of the power battery system) (the preset charging cut-off condition can be specified by the manufacturer of the power battery system to achieve sufficient rest of the power battery system).

[0063] (1-2) Power on the power battery system at low voltage, read the individual cell voltage data after resting, and select the cell with the largest individual voltage and several adjacent cells (for example, select 5 adjacent cells, numbered A0, A1, A2, A3, A4, and A5 from left to right); remove the top cover of the power battery, and charge the target cell (i.e., the aforementioned cell with the largest individual voltage and several adjacent cells) again with a preset current (the preset current can be, for example, a current not greater than 0.1C, or can be determined by the power battery system manufacturer) to the preset charging cut-off condition. After charging is completed, let it rest for a preset period of time (the preset period of time can be, for example, 2 hours, or the resting time specified by the power battery system manufacturer).

[0064] (1-3) Discharge multiple adjacent cells to their corresponding preset capacity (for example, cells A1 to A5 can be discharged to 3%Q0, 6%Q0, 9%Q0, 12%Q0, and 15%Q0 respectively, and the discharge capacity of each cell can be recorded as C1, C2, C3, C4, and C5 respectively, with A0 as a control group and no treatment). Then restore the power battery system; keep the power battery system powered on at low voltage and record the equalization time as the starting point of the equalization test. Discharge to the preset discharge cutoff condition according to the preset discharge mechanism (the preset discharge mechanism can be negotiated and formulated with the power battery system manufacturer) (the preset discharge cutoff condition can be specified by the power battery system manufacturer); further, let it stand for a preset standing time (the set time period can be, for example, 2 hours, or the standing time specified by the power battery system manufacturer), and record the standing time (i.e., the preset standing time) as T1.

[0065] S2. After connecting the static test platform to the power battery system that has undergone pre-test preparation, perform a static balancing capability test on the power battery system to obtain static test data.

[0066] S3. Re-perform at least one pre-test preparation operation on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, perform a dynamic balancing capability test on the power battery system to obtain dynamic test data.

[0067] There are various operating procedures for static or dynamic balancing capability testing, all of which can be set according to the actual vehicle application.

[0068] In another specific implementation, step S2 is configured at least as follows:

[0069] (2-1) according to Figure 2 ( Figure 2 (This is a system equipment connection diagram provided in an embodiment of the present invention) to connect the power battery system to the static test platform, maintain the power battery system under low voltage and record data throughout the process;

[0070] (2-2) With the equalization function enabled, set a set time period (e.g., 72h±1h).

[0071] (2-3) Charge the power battery system according to the set charging mechanism (the set charging mechanism can be negotiated and determined with the power battery system manufacturer) to the set charging cutoff condition (the set charging cutoff condition can be specified by the power battery system manufacturer, and it can be, but is not limited to, consistent with the aforementioned preset charging cutoff condition); energize the power battery system at low voltage, and record the total equalization time (i.e., the static equalization time below) as the endpoint of the equalization test, denoted as T. J .

[0072] In yet another specific implementation, step S3 is configured at least as follows:

[0073] (3-1) Reprocess the power battery system according to the aforementioned step S1, and continue according to... Figure 2 Connect the power battery system to the dynamic test platform, keep the power battery system powered on at low voltage and record data throughout the process;

[0074] (3-2) Cycle the power battery system to a set SOC cycle limit (which can be determined in consultation with the power battery system manufacturer) using a set operating condition. Further, charge the power battery system to a set charging cutoff condition (which can be determined in consultation with the power battery system manufacturer) according to a predetermined charging mechanism (which can be determined in consultation with the power battery system manufacturer).

[0075] (3-3) After cycling through the predetermined time according to step (3-2) (the predetermined time can be determined in consultation with the manufacturer of the power battery system), charge the power battery system to the pre-configured charging cutoff condition according to the pre-configured charging mechanism (the pre-configured charging cutoff condition can be determined in consultation with the manufacturer of the power battery system); further, power down the power battery system at low voltage, and record the total equalization time as the endpoint of the equalization test, denoted as T2, then the dynamic equalization time T D By T D =T2-T1 is calculated.

[0076] See also Figure 2 In another specific implementation, the static test platform and the dynamic test platform equipment can optionally be shared.

[0077] The shared equipment includes at least a host computer, data acquisition equipment, low-voltage power supply, BMS control box, and high-voltage charging and discharging equipment;

[0078] The first end of the power battery system is connected to the high-voltage charging and discharging equipment (this can be done via a high-voltage wiring harness), and the second end of the power battery system is connected to the first end of the BMS control box.

[0079] The second terminal of the BMS control box is connected to the KL15 wake-up terminal of the low-voltage power supply, the third terminal of the BMS control box is connected to the 24V output terminal of the low-voltage power supply, and the fourth terminal of the BMS control box is connected to the first terminal of the data acquisition device.

[0080] The second end of the data acquisition device is connected to the host computer.

[0081] S4. Perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system balance performance evaluation result based on at least the static test data, dynamic test data and post-test processing data.

[0082] The system equilibrium performance evaluation results can include a variety of evaluation parameters.

[0083] In another specific implementation, optionally, the system equalization performance evaluation results include at least the average static equalization current and the average dynamic equalization current of each target cell.

[0084] In yet another specific implementation, the average static equalization current can optionally be calculated at least in the following manner:

[0085] I avgnJ =ΔC nJ / T J ;

[0086] In the above formula, I avgnJ ΔC represents the average static equilibrium current. nJ T represents the balanced capacity of each target cell after static balancing capability testing. J Indicates the duration of static equilibrium.

[0087] In yet another specific implementation, the average value of the dynamic equalization current may optionally be calculated at least in the following manner:

[0088] I avgnD =(ΔC nD -I avgnJ ×T1) / T D ;

[0089] In the above formula, I avgnD ΔC represents the average value of the dynamic equilibrium current. nD I represents the balanced capacity of each target cell after dynamic balancing capability testing. avgnJ T represents the average static equalization current, T1 represents the preset resting time, and T... D This indicates the duration of dynamic equilibrium.

[0090] Based on this, in another specific implementation, step S4 is configured at least as follows:

[0091] (4-1) Charge the power battery system to the preset charging cut-off condition according to the preset charging mechanism (the preset charging mechanism can be negotiated and formulated with the power battery system manufacturer) (the preset charging cut-off condition can be specified by the power battery system manufacturer); and let the power battery system stand still for a preset set-off time under the condition of low voltage (the preset set-off time can be, for example, 2 hours, or the set-off time specified by the power battery system manufacturer).

[0092] (4-2) Remove the top cover of the power battery, and charge the target cells to the preset charging cutoff condition with a constant current of no more than 0.1C or the current recommended by the power battery system manufacturer. After charging, let them stand for 2 hours and record the charging capacity of each cell as C1', C2', C3', C4', and C5'. Further, calculate the difference between C1 and C1' as the amount of charge lost by cell A1 and record it as ΔC1. Calculate the amount of charge lost by cells A2 to A5 as ΔC1. n And denoted as ΔC2, ΔC3, ΔC4, ΔC5 (it can be understood that if Cn' is measured by the power battery system after performing a static equalization capability test, then the obtained ΔC n That is, the aforementioned ΔC nJ Conversely, if Cn' is measured by a power battery system that has undergone dynamic balancing capability testing, then the obtained ΔC n That is, the aforementioned ΔC nD );

[0093] (4-3) According to Formula I avgnJ =ΔC nJ / T J Calculate the average static equalization current I for each target cell. avgnJ (n=1~5), where ΔC nJ The unit is ampere-hour (Ah), T J The unit is seconds (s); according to formula I avgnD =(ΔC nD -I avgnJ ×T1) / T D Calculate the average dynamic equilibrium current I for each target cell. avgnD (n=1~5), where ΔC nD The unit is ampere-hour (Ah), T D The unit is seconds (s).

[0094] The technical solution provided in this embodiment first performs at least one pre-test preparation operation on the power battery system; further, after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, a static equalization capability test operation is performed on the power battery system to obtain static test data; further, at least one pre-test preparation operation is performed again on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, a dynamic equalization capability test operation is performed on the power battery system to obtain dynamic test data; finally, at least one post-test processing operation is performed on the power battery system to obtain post-test processed data, and then the system equalization performance evaluation result is output based on at least the static test data, dynamic test data, and post-test processed data. Therefore, this embodiment proposes at least one equalization performance testing framework for power battery systems, which can provide technical support for equalization circuit design verification, control algorithm optimization, and industry standard formulation.

[0095] It should be noted that the balancing capability testing method for the power battery system shown in the above embodiments or implementation methods is a test procedure that performs static testing first and then dynamic testing. In actual vehicle applications, dynamic testing can also be performed first and then static testing. Therefore, Figure 3 This is a flowchart of another method for testing the balancing capability of a power battery system provided in an embodiment of the present invention. Figure 1 The only difference between the two processes is the execution order of static and dynamic tests. The test details for both can be implemented with reference to the previous embodiment, and will not be repeated here.

[0096] Figure 4 This is a schematic diagram of a power battery system balancing capability testing device provided in an embodiment of the present invention. This embodiment is applicable to at least any scenario for quantitative testing and evaluation of the balancing capability of a power battery system in a new energy vehicle. The power battery system balancing capability testing device can be implemented using software and / or hardware. Figure 4 As shown, the equalization capability testing device for a power battery system includes at least:

[0097] The first pre-test preparation module 110 is used to perform at least one pre-test preparation operation on the power battery system.

[0098] The first static test module 120 is used to connect the static test platform to the power battery system after the pre-test preparation operation, and then perform a static equalization capability test on the power battery system to obtain static test data.

[0099] The first dynamic test module 130 is used to re-perform at least one pre-test preparation operation on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, perform a dynamic balancing capability test operation on the power battery system to obtain dynamic test data.

[0100] The first result output module 140 is used to perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system balanced performance evaluation result based on at least the static test data, dynamic test data and post-test processing data.

[0101] Optionally, the static test platform and the dynamic test platform share the same equipment;

[0102] The shared equipment includes at least a host computer, data acquisition equipment, low-voltage power supply, BMS control box, and high-voltage charging and discharging equipment;

[0103] The first terminal of the power battery system is connected to the high-voltage charging and discharging equipment, and the second terminal of the power battery system is connected to the first terminal of the BMS control box.

[0104] The second terminal of the BMS control box is connected to the KL15 wake-up terminal of the low-voltage power supply, the third terminal of the BMS control box is connected to the 24V output terminal of the low-voltage power supply, and the fourth terminal of the BMS control box is connected to the first terminal of the data acquisition device.

[0105] The second end of the data acquisition device is connected to the host computer.

[0106] Optionally, the system equalization performance evaluation results shall include at least the average static equalization current and the average dynamic equalization current of each target cell.

[0107] Alternatively, the average static equalization current can be calculated at least in the following ways:

[0108] I avgnJ =ΔC nJ / T J ;

[0109] In the above formula, I avgnJ ΔC represents the average static equilibrium current. nJ T represents the balanced capacity of each target cell after static balancing capability testing. J Indicates the duration of static equilibrium.

[0110] Optionally, the average value of the dynamic equalization current is calculated at least in the following ways:

[0111] I avgnD =(ΔC nD -I avgnJ ×T1) / T D ;

[0112] In the above formula, I avgnD ΔC represents the average value of the dynamic equilibrium current. nD I represents the balanced capacity of each target cell after dynamic balancing capability testing. avgnJ T represents the average static equalization current, T1 represents the preset resting time, and T... D This indicates the duration of dynamic equilibrium.

[0113] The technical solution provided in this embodiment firstly performs at least one pre-test preparation operation on the power battery system through a first pre-test preparation module; further, after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation through a first static test module, a static equalization capability test operation is performed on the power battery system to obtain static test data; further, after re-performing at least one pre-test preparation operation on the power battery system through a first dynamic test module, and connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, a dynamic equalization capability test operation is performed on the power battery system to obtain dynamic test data; finally, at least one post-test processing operation is performed on the power battery system through a first result output module to obtain post-test processed data, and then the system equalization performance evaluation result is output based on at least the static test data, dynamic test data, and post-test processed data. Therefore, this embodiment proposes at least one equalization performance testing framework for power battery systems, which can provide technical support for equalization circuit design verification, control algorithm optimization, and industry standard formulation.

[0114] Figure 5 This is a schematic diagram of another power battery system balancing capability testing device provided in an embodiment of the present invention. This embodiment is applicable to at least any scenario for quantitative testing and evaluation of the balancing capability of a power battery system in a new energy vehicle. This power battery system balancing capability testing device can be implemented using software and / or hardware. Figure 5 As shown, the equalization capability testing device for a power battery system includes at least:

[0115] The second pre-test preparation module 210 is used to perform at least one pre-test preparation operation on the power battery system.

[0116] The second dynamic test module 220 is used to connect the dynamic test platform to the power battery system after the pre-test preparation operation, and then perform a dynamic balancing capability test on the power battery system to obtain dynamic test data.

[0117] The second static test module 230 is used to re-perform at least one pre-test preparation operation on the power battery system, and after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, perform a static equalization capability test operation on the power battery system to obtain static test data.

[0118] The second result output module 240 is used to perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system equalization performance evaluation result based on at least the static test data, dynamic test data and post-test processing data.

[0119] Optionally, the static test platform and the dynamic test platform share the same equipment;

[0120] The shared equipment includes at least a host computer, data acquisition equipment, low-voltage power supply, BMS control box, and high-voltage charging and discharging equipment;

[0121] The first terminal of the power battery system is connected to the high-voltage charging and discharging equipment, and the second terminal of the power battery system is connected to the first terminal of the BMS control box.

[0122] The second terminal of the BMS control box is connected to the KL15 wake-up terminal of the low-voltage power supply, the third terminal of the BMS control box is connected to the 24V output terminal of the low-voltage power supply, and the fourth terminal of the BMS control box is connected to the first terminal of the data acquisition device.

[0123] The second end of the data acquisition device is connected to the host computer.

[0124] Optionally, the system equalization performance evaluation results shall include at least the average static equalization current and the average dynamic equalization current of each target cell.

[0125] Alternatively, the average static equalization current can be calculated at least in the following ways:

[0126] I avgnJ =ΔC nJ / T J ;

[0127] In the above formula, I avgnJ ΔC represents the average static equilibrium current. nJ T represents the balanced capacity of each target cell after static balancing capability testing. J Indicates the duration of static equilibrium.

[0128] Optionally, the average value of the dynamic equalization current is calculated at least in the following ways:

[0129] I avgnD =(ΔC nD -I avgnJ ×T1) / T D ;

[0130] In the above formula, I avgnD ΔC represents the average value of the dynamic equilibrium current. nD I represents the balanced capacity of each target cell after dynamic balancing capability testing. avgnJ T represents the average static equalization current, T1 represents the preset resting time, and T... D This indicates the duration of dynamic equilibrium.

[0131] The technical solution provided in this embodiment firstly performs at least one pre-test preparation operation on the power battery system through a second pre-test preparation module; further, after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation through a second dynamic test module, a dynamic balancing capability test operation is performed on the power battery system to obtain dynamic test data; further, after re-performing at least one pre-test preparation operation on the power battery system through a second static test module, and connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, a static balancing capability test operation is performed on the power battery system to obtain static test data; finally, at least one post-test processing operation is performed on the power battery system through a second result output module to obtain post-test processed data, and then the system balancing performance evaluation result is output based on at least the static test data, dynamic test data, and post-test processed data. Therefore, this embodiment proposes at least one balancing performance testing framework for power battery systems, which can provide technical support for balancing circuit design verification, control algorithm optimization, and industry standard formulation.

[0132] This embodiment provides an electronic device. Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. See also: Figure 6The electronic device 1000 includes a processor 1001 and a memory 1002. The memory 1002 stores computer-readable instructions. When the computer-readable instructions are executed by the processor 1001, the steps in any of the above-mentioned power battery system balancing capability test methods are performed. Through the above technical solution, the processor 1001 and the memory 1002 are interconnected and communicate with each other through a communication bus and / or other forms of connection mechanism (not shown). The memory 1002 stores a computer program that can be executed by the processor. When the electronic device 1000 is running, the processor 1001 executes the computer program to perform the power battery system balancing capability test method in any optional implementation of the above embodiments, so as to achieve at least the following functions: performing at least one pre-test preparation operation on the power battery system; connecting the static test platform to the power battery system after the pre-test preparation operation, and performing a static balancing capability test operation on the power battery system to obtain static test data; re-performing at least one pre-test preparation operation on the power battery system, and connecting the dynamic test platform to the power battery system after the pre-test preparation operation, and performing a dynamic balancing capability test operation on the power battery system to obtain dynamic test data; performing at least one post-test processing operation on the power battery system to obtain post-test processing data, and then outputting a system balancing performance evaluation result based at least on the static test data, dynamic test data, and post-test processing data.

[0133] This embodiment provides a computer-readable storage medium storing a computer program. When executed by a processor, the program implements the equalization capability testing method for a power battery system as provided in all embodiments of this application: performing at least one pre-test preparation operation on the power battery system; connecting a static test platform to the power battery system after the pre-test preparation operation, and performing a static equalization capability test operation on the power battery system to obtain static test data; re-performing at least one pre-test preparation operation on the power battery system, and connecting a dynamic test platform to the power battery system after the pre-test preparation operation, and performing a dynamic equalization capability test operation on the power battery system to obtain dynamic test data; performing at least one post-test processing operation on the power battery system to obtain post-test processing data, and then outputting a system equalization performance evaluation result based at least on the static test data, dynamic test data, and post-test processing data.

[0134] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0135] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0136] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0137] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—as well as conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the balancing capability of a power battery system, characterized in that, At least including: Perform at least one pre-test preparation operation on the power battery system; After connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, a static equalization capability test operation is performed on the power battery system to obtain static test data. Re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, perform a dynamic balancing capability test operation on the power battery system to obtain dynamic test data; At least one post-test processing operation is performed on the power battery system to obtain post-test processing data, and then the system balanced performance evaluation result is output based on at least the static test data, the dynamic test data and the post-test processing data.

2. A method for testing the balancing capability of a power battery system, characterized in that, At least including: Perform at least one pre-test preparation operation on the power battery system; After connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, a dynamic balancing capability test operation is performed on the power battery system to obtain dynamic test data. Re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, perform a static equalization capability test operation on the power battery system to obtain static test data; At least one post-test processing operation is performed on the power battery system to obtain post-test processing data, and then the system balanced performance evaluation result is output based on at least the static test data, the dynamic test data and the post-test processing data.

3. The method for testing the balancing capability of a power battery system according to claim 1 or 2, characterized in that, The static testing platform and the dynamic testing platform share the same equipment; The shared equipment includes at least a host computer, data acquisition equipment, low-voltage power supply, BMS control box, and high-voltage charging and discharging equipment; The first end of the power battery system is connected to the high-voltage charging and discharging equipment, and the second end of the power battery system is connected to the first end of the BMS control box; The second terminal of the BMS control box is connected to the KL15 wake-up terminal of the low-voltage power supply, the third terminal of the BMS control box is connected to the 24V output terminal of the low-voltage power supply, and the fourth terminal of the BMS control box is connected to the first terminal of the data acquisition device. The second end of the data acquisition device is connected to the host computer.

4. The method for testing the balancing capability of a power battery system according to claim 1 or 2, characterized in that, The system equalization performance evaluation results include at least the average static equalization current and the average dynamic equalization current for each target cell.

5. The method for testing the balancing capability of a power battery system according to claim 4, characterized in that, The average static equalization current can be calculated at least in the following ways: I avgnJ =ΔC nJ / T J ; In the above formula, I avgnJ The static equalization current average value, ΔC, represents the average value of the static equalization current. nJ T represents the balanced capacity of each target cell after static balancing capability testing. J Indicates the duration of static equilibrium.

6. The method for testing the balancing capability of a power battery system according to claim 4, characterized in that, The average value of the dynamic equilibrium current is calculated at least in the following ways: I avgnD =(ΔC nD -I avgnJ ×T1) / T D ; In the above formula, I avgnD ΔC represents the average value of the dynamic equalization current. nD I represents the balanced capacity of each target cell after dynamic balancing capability testing. avgnJ T represents the average value of the static equalization current, T1 represents the preset resting time, and T D This indicates the duration of dynamic equilibrium.

7. A device for testing the balancing capability of a power battery system, characterized in that, At least for performing the equalization capability test method of the power battery system as described in claim 1; The equalization capability testing device for the power battery system includes at least the following: The first pre-test preparation module is used to perform at least one pre-test preparation operation on the power battery system. The first static test module is used to connect the static test platform to the power battery system after the pre-test preparation operation, and then perform a static equalization capability test on the power battery system to obtain static test data. The first dynamic test module is used to re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the dynamic test platform to the power battery system that has undergone the pre-test preparation operation, perform a dynamic balancing capability test operation on the power battery system to obtain dynamic test data. The first result output module is used to perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system balanced performance evaluation result based at least on the static test data, the dynamic test data and the post-test processing data.

8. A device for testing the balancing capability of a power battery system, characterized in that, At least for performing the equalization capability test method of the power battery system as described in claim 2; The equalization capability testing device for the power battery system includes at least the following: The second pre-test preparation module is used to perform at least one pre-test preparation operation on the power battery system. The second dynamic testing module is used to connect the dynamic testing platform to the power battery system after the pre-test preparation operation, and then perform a dynamic balancing capability test on the power battery system to obtain dynamic test data. The second static test module is used to re-perform at least one of the pre-test preparation operations on the power battery system, and after connecting the static test platform to the power battery system that has undergone the pre-test preparation operation, perform a static equalization capability test operation on the power battery system to obtain static test data. The second result output module is used to perform at least one post-test processing operation on the power battery system to obtain post-test processing data, and then output the system balanced performance evaluation result based at least on the static test data, the dynamic test data and the post-test processing data.

9. An electronic device comprising a memory and a processor, the memory storing a computer program executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the equalization capability test method of the power battery system according to any one of claims 1-6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps in the equalization capability test method of the power battery system according to any one of claims 1-6.

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