Multifunctional detection equipment for battery pack and use method of multifunctional detection equipment

Abstract

The invention provides multifunctional detection equipment for a battery pack and a use method of the multifunctional detection equipment. The multifunctional detection equipment comprises a detection platform for bearing a to-be-detected battery pack; the basic electrical performance detection module is used for detecting the charging and discharging performance, the internal resistance and the consistency of the battery pack to be detected; the safety protection performance detection module is used for detecting the over-charge / over-discharge protection performance, the short-circuit protection performance, the thermal safety protection performance and the insulation performance of the to-be-detected battery pack; the environment adaptability detection module is used for detecting the performance stability, the mechanical strength performance and the waterproof and dustproof performance of the battery to be detected in temperature and humidity circulation; the battery management system function detection module is used for detecting the functional integrity of the battery management system; and the data management and analysis module is used for comprehensively studying and judging the plurality of detection results and generating a detection report. According to the invention, the generation efficiency and reliability of the detection report are improved.

Description

Technical Field

[0001] The present invention relates to the field of artificial intelligence education technology, and in particular to a multifunctional battery pack detection device and a method for using the same. Background Art

[0002] Multifunctional testing of battery packs is a core link in ensuring the safety, reliability and performance stability of battery packs.

[0003] The existing method for performing multi-functional testing on battery packs is: decentralized single-function equipment + manual circulation. Specifically, the battery packs are tested separately by different special equipment, and are manually circulated between different special equipment. It has the following technical problems: 1. The battery packs need to be repeatedly disassembled and transported, the testing is fragmented, the single complete testing cycle is too long, and the testing efficiency is low. 2. The data storage format of each special equipment is not unified, resulting in the problem of data islands. The test report can only be generated through manual integration, and the generation efficiency and reliability of the test report are low. In addition, the existing tests are all aimed at the charging and discharging performance of the battery pack, and there is a lack of effective testing of the battery management system in the battery pack. However, the battery management system is the key control component of the battery pack, which is equivalent to the "brain" of the battery pack. Since the battery management system is not effectively tested, the testing of the battery pack is not comprehensive.

[0004] Therefore, there is an urgent need to provide a multifunctional battery pack testing device and its use method. This device can perform integrated testing of multiple functions of the battery pack, eliminating the disassembly and transportation process, and integrate data from different test items to improve the efficiency and accuracy of the generated test reports. Furthermore, it can perform specialized testing of the battery management system in the battery pack to improve the comprehensiveness of the test. Summary of the Invention

[0005] In view of this, it is necessary to provide a multifunctional detection device for battery packs and a method of using the same to solve the technical problems existing in the prior art of using dedicated equipment for detection + manual circulation, without detecting the battery management system, resulting in low detection efficiency, data islands and incomplete detection, which in turn causes technical problems such as low efficiency and accuracy in generating detection reports.

[0006] In a first aspect, in order to solve the above technical problems, the present invention provides a multifunctional detection device for a battery pack, comprising: Testing platform, used to carry the battery pack to be tested; A basic electrical performance testing module is used to test the charge and discharge performance, internal resistance and consistency of the battery pack to be tested and obtain basic electrical performance test results; A safety protection performance detection module is used to detect the overcharge / over-discharge protection performance, short-circuit protection performance, thermal safety protection performance and insulation performance of the battery pack to be detected, and obtain safety protection performance detection results; An environmental adaptability testing module is used to test the performance stability, mechanical strength, and waterproof and dustproof performance of the battery to be tested in temperature and humidity cycles to obtain environmental adaptability test results; The battery management system function detection module is used to detect the functional integrity of the battery management system and obtain the battery management system function detection results; The data management and analysis module is used to comprehensively analyze the basic electrical performance test results, safety protection performance test results, environmental adaptability test results and battery management system function test results to generate a test report.

[0007] In a possible implementation, the basic electrical performance detection module includes a charge and discharge performance detection unit, an internal resistance detection unit, and a current / voltage consistency detection unit; The charge and discharge performance detection unit is used to detect the standard charge and discharge performance of the battery pack to be detected based on a standard charge simulation power supply and a standard discharge scheme, detect the fast charge performance of the battery pack to be detected based on a fast charge simulation power supply, and detect the dynamic charge and discharge performance of the battery pack to be detected based on a dynamic charge simulation power supply and a dynamic discharge scheme, to obtain a charge and discharge detection result; The internal resistance detection unit is used to measure the internal resistance of the battery pack to be detected based on an AC impedance method or a DC discharge method to obtain an internal resistance detection result; The current / voltage consistency detection unit is used to detect the voltage and current of each single battery in the battery pack to be detected, and determine the current / voltage consistency of the battery pack to be detected based on the voltage and the current.

[0008] In a possible implementation, the safety protection performance detection module includes an overcharge / overdischarge protection detection unit, a short circuit protection detection unit, a thermal safety protection detection unit, and an insulation detection unit; The overcharge / over-discharge protection detection unit is used to perform overcharge protection detection and over-discharge protection detection on the battery pack to be detected based on the overcharge detection scheme and the over-discharge detection scheme respectively, and obtain an overcharge / over-discharge protection detection result; The short-circuit protection detection unit is used to perform internal short-circuit protection detection and load short-circuit protection detection on the battery pack to be detected based on the internal short-circuit simulation signal and the load short-circuit simulation signal to obtain a short-circuit detection result; The thermal safety protection detection unit is used to perform heating failure detection, temperature protection detection and thermal runaway propagation detection on the battery pack to be detected based on a simulated heat source to obtain a thermal safety protection detection result; The insulation detection unit is used to apply a target pressure having a pressure value greater than a pressure threshold to the battery pack to be detected, and obtain the insulation resistance of the battery pack to be detected under the target pressure.

[0009] In a possible implementation, the environmental adaptability detection module includes a temperature and humidity cycle detection unit, a mechanical strength detection unit, and a waterproof and dustproof detection unit; The temperature and humidity cycle detection unit is used to obtain the performance stability index value of the battery pack to be tested in the temperature and humidity cycle when placed in a high and low temperature alternating hot and humid environment temperature box; The mechanical strength testing unit is used to simulate vibration conditions and impact conditions based on a vibration table, and to test the mechanical properties of the battery pack to be tested under the vibration conditions and the impact conditions; The waterproof and dustproof detection unit is used to detect the waterproof and dustproof performance of the battery pack to be detected under different IP levels.

[0010] In a possible implementation, the battery management system function detection module includes a protocol detection unit and a function detection unit; The protocol detection unit is used to send legal messages and illegal messages that comply with a set protocol to the battery management system, obtain a first response message from the battery management system, and obtain a protocol detection result based on the first response message; The function detection unit is used to send a simulated fault message and a control message to the battery management system, obtain a second response message from the battery management system, and obtain a function detection result based on the second response message.

[0011] In a possible implementation, the data management and analysis module includes a data storage unit, a data analysis unit, and a report generation unit; The data storage unit is used to store the basic electrical performance test results, safety protection performance test results, environmental adaptability test results, battery management system function test results and test process data; The data analysis unit is used to analyze the detection process data, the basic electrical performance test results, the safety protection performance test results, the environmental adaptability test results, and the battery management system function test results based on a preset machine learning algorithm to obtain a detection analysis result; The report generating unit is used to generate the detection report based on a preset report template and the detection analysis result.

[0012] In a possible implementation, the data management and analysis module further includes a fault prediction unit and a fault contingency plan unit; The fault prediction unit is used to input the detection process data, the basic electrical performance test results, the safety protection performance test results, the environmental adaptability test results, and the battery management system function test results into a fault prediction model to obtain a fault prediction result; The fault contingency plan unit is used to perform matching in a contingency plan database based on the fault prediction result to obtain a target fault contingency plan corresponding to the fault prediction result.

[0013] In a possible implementation, the data management and analysis module further includes a traceability unit; The traceability unit is used to obtain the unique identification code of the battery pack to be tested and establish a binding relationship between the unique identification code and the test report.

[0014] In a possible implementation, the device further includes a long-term life detection module: The long-term life detection module is used to detect the cycle service life of the battery pack to be detected and obtain a long-term life detection result.

[0015] In a second aspect, the present invention further provides a method for using a multifunctional detection device for a battery pack, wherein the multifunctional detection device for a battery pack is the multifunctional detection device for a battery pack described in any one of the possible implementations above, and the method for using the multifunctional detection device comprises: Perform basic electrical performance testing, safety protection performance testing, environmental adaptability testing, and battery management system function testing on the battery pack to be tested placed on the testing platform to obtain multifunctional test results; Comprehensively analyze and judge the multifunctional detection results and generate a detection report.

[0016] The beneficial effects of the present invention are as follows: the multifunctional detection equipment for battery packs provided by the present invention integrates the basic electrical performance detection module, the safety protection performance detection module, the environmental adaptability detection module and the battery management system function detection module into the same device, thereby eliminating the need for manual transportation of battery packs to different dedicated equipment, eliminating the transportation time, and improving the single full-process detection time. It has been verified that the detection time is shortened by more than 60%. At the same time, since the multifunctional detection modules are all integrated into one device, the data format of the detection results of each functional detection module is unified, eliminating the data island problem, and providing a data basis for the use of subsequent data management and analysis modules. In addition, the present invention can realize the integration and analysis of the detection results of the above-mentioned multiple functional detection modules by setting up a data management and analysis module, thereby realizing multi-dimensional analysis and automatically generating the detection report, reducing the errors of manual interpretation, and improving the generation efficiency and reliability of the detection report.

[0017] In summary, the present invention achieves a leap from single-point detection to full life cycle data detection of battery packs, and realizes comprehensive and reliable detection of battery packs through multifunctional detection equipment with hardware integration, working condition coupling and intelligent analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a multifunctional detection device for a battery pack provided by the present invention; Figure 2 A schematic structural diagram of an embodiment of a basic electrical performance detection module provided by the present invention; Figure 3 A schematic structural diagram of an embodiment of a safety protection performance detection module provided by the present invention; Figure 4 A schematic structural diagram of an embodiment of the environmental adaptability detection module provided by the present invention; Figure 5 A schematic structural diagram of an embodiment of a battery management system function detection module provided by the present invention; Figure 6 A schematic diagram of the structure of an embodiment of the data management and analysis module provided by the present invention; Figure 7 A schematic flow chart of an embodiment of a method for using the multifunctional detection device for a battery pack provided by the present invention. DETAILED DESCRIPTION

[0020] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in the present invention illustrate operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps that have no logical contextual relationship can be reversed in order or implemented simultaneously. In addition, those skilled in the art, guided by the content of the present invention, can add one or more other operations to the flowcharts or remove one or more operations from the flowcharts. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0022] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The present invention provides a multifunctional detection device for a battery pack and a method for using the same, which are described below.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the multifunctional detection device for a battery pack provided by the present invention, as shown in FIG. Figure 1 As shown, the multifunctional testing device 10 for a battery pack includes: The testing platform 100 is used to carry the battery pack to be tested; The basic electrical performance testing module 200 is used to test the charge and discharge performance, internal resistance and consistency of the battery pack to be tested and obtain basic electrical performance test results; The safety protection performance detection module 300 is used to detect the overcharge / over-discharge protection performance, short-circuit protection performance, thermal safety protection performance, and insulation performance of the battery pack to be detected, and obtain the safety protection performance detection results; Environmental adaptability testing module 400, used to test the performance stability, mechanical strength, and waterproof and dustproof performance of the battery under test in temperature and humidity cycles, and obtain environmental adaptability test results; The battery management system function detection module 500 is used to detect the functional integrity of the battery management system and obtain the battery management system function detection result; The data management and analysis module 600 is used to comprehensively analyze the basic electrical performance test results, safety protection performance test results, environmental adaptability test results and battery management system function test results to generate a test report.

[0025] Since battery packs from different manufacturers have different specifications, in order to achieve the applicability and compatibility of the multifunctional detection equipment proposed in the embodiment of the present invention, the detection platform 100 is an adjustable detection platform. Specifically, it is equipped with adjustable clamps and limiting components to realize the carrying of battery packs of various specifications. Specifically, the size variation range of the detection platform 100 is 200mm-2000mm in length, 100mm-1000mm in width, and 50mm-500mm in height.

[0026] It should be understood that: since there are many result parameters for basic electrical performance test results, safety protection performance test results, environmental adaptability test results and battery management system function test results, in some embodiments of the present invention, the data management and analysis module 600 can use a machine learning model to comprehensively analyze the input multiple test results and generate a test report.

[0027] Compared with the prior art, the multifunctional detection device 10 for battery packs provided in the embodiment of the present invention integrates the basic electrical performance detection module 200, the safety protection performance detection module 300, the environmental adaptability detection module 400 and the battery management system function detection module 500 into the same device, eliminating the need for manual transportation of battery packs to different dedicated equipment, eliminating the transportation time, and improving the single full-process detection time. It has been verified that the detection time is shortened by more than 60%. At the same time, since the multifunctional detection modules are all integrated into one device, the data format of the detection results of each functional detection module is unified, eliminating the data island problem and providing a data foundation for the use of subsequent data management and analysis modules. In addition, the embodiment of the present invention can realize the integration and analysis of the detection results of the above-mentioned multiple functional detection modules by setting the data management and analysis module 600, realizing the purpose of multi-dimensional analysis and automatic generation of detection reports, reducing the errors of manual interpretation, and improving the generation efficiency and reliability of detection reports.

[0028] In summary, the embodiments of the present invention achieve a leap from single-point detection to full life cycle data detection of battery packs, and realize comprehensive and reliable detection of battery packs through multifunctional detection equipment with hardware integration, working condition coupling and intelligent analysis.

[0029] In some embodiments of the present invention, Figure 2 As shown, the basic electrical performance detection module 200 includes a charge and discharge performance detection unit 210, an internal resistance detection unit 220 and a current / voltage consistency detection unit 230; The charge and discharge performance detection unit 210 is used to detect the standard charge and discharge performance of the battery pack to be detected based on the standard charge simulation power supply and the standard discharge scheme, to detect the fast charging performance of the battery pack to be detected based on the fast charge simulation power supply, and to detect the dynamic charge and discharge performance of the battery pack to be detected based on the dynamic charge simulation power supply and the dynamic discharge scheme, to obtain the charge and discharge detection results.

[0030] Among them, the standard charging simulation power supply is used to simulate the power supply of the battery pack under standard charging and discharging parameters. The standard charging and discharging test specifically simulates the standard charging (constant current and constant voltage charging) and discharging processes, and detects the core indicators of the battery pack to be tested, such as capacity, voltage platform, and energy efficiency, to verify whether it meets the design specifications.

[0031] Among them, fast charging simulation power supply refers to charging the battery pack to be tested with charging parameters under different fast charging protocols. Fast charging detection is specifically: simulating fast charging scenarios through high-current fast charging protocols (such as PD, QC, etc.), testing the battery pack's voltage / current response, charging time, heat generation and fast charging compatibility under fast charging conditions, and evaluating the impact of fast charging on battery life.

[0032] Among them, the dynamic charging simulation power supply refers to the power supply that simulates dynamic working conditions such as vehicle starting, acceleration and braking. The dynamic charging and discharging detection is specifically: detecting the performance stability of the battery pack to be tested under dynamic working conditions, that is, under variable load conditions.

[0033] The embodiment of the present invention improves the comprehensiveness of detection by detecting charging and discharging in various situations.

[0034] The internal resistance detection unit 220 is used to measure the internal resistance of the battery pack to be detected based on an AC impedance method or a DC discharge method to obtain an internal resistance detection result.

[0035] The internal resistance detection result includes but is not limited to the results of determining whether the internal resistance is abnormal and whether the internal connection is reliable based on the internal resistance value.

[0036] The current / voltage consistency detection unit 230 is used to detect the voltage and current of each single battery in the battery pack to be detected, and determine the current / voltage consistency of the battery pack to be detected based on the voltage and current.

[0037] Among them, the current / voltage consistency result includes four situations: both current and voltage consistency are good, current consistency is good but voltage consistency is poor, current consistency is poor but voltage consistency is good, and current and voltage consistency are poor.

[0038] Current / voltage consistency testing can avoid the risk of over-discharge during the process due to cell differences and can be used to verify the balancing function of the battery management system.

[0039] The basic electrical performance detection module 200 of the embodiment of the present invention can evaluate the electrical performance of the battery pack to be tested under normal working conditions by setting multiple basic electrical performance tests including charging and discharging, internal resistance and voltage / current consistency.

[0040] In some embodiments of the present invention, Figure 3 As shown, the safety protection performance detection module 300 includes an overcharge / overdischarge protection detection unit 310, a short circuit protection detection unit 320, a thermal safety protection detection unit 330 and an insulation detection unit 340; The overcharge / over-discharge protection detection unit 310 is used to perform overcharge protection detection and over-discharge protection detection on the battery pack to be detected based on the overcharge detection scheme and the over-discharge detection scheme respectively, and obtain the overcharge / over-discharge protection detection result.

[0041] Among them, the overcharge detection scheme is: forcing a voltage exceeding the rated charging voltage of the battery pack to be tested to be input into the battery pack to be tested, testing whether the battery management system can cut off the charging circuit in time, and recording the protection response time and recovery mechanism to verify the accuracy of the overcharge protection threshold.

[0042] Among them, the over-discharge detection scheme is: control the battery pack to be tested to continuously discharge to below the rated cut-off voltage, detect whether the over-discharge protection function of the battery management system is triggered, and avoid deep discharge damage to the battery.

[0043] The short circuit protection detection unit 320 is used to perform internal short circuit protection detection and load short circuit protection detection on the battery pack to be detected based on the internal short circuit simulation signal and the load short circuit simulation signal to obtain a short circuit detection result.

[0044] The internal short-circuit simulation signal simulates a short circuit within the battery cell. Common types include diaphragm failure, dendrite penetration, and metal impurities. The load short-circuit simulation signal simulates a short circuit in the battery's external circuit. Common types include wire damage and connector failure.

[0045] The embodiment of the present invention performs protection detection on two different short circuit mechanisms, namely, internal short circuit and complex short circuit, respectively, thereby improving the comprehensiveness of short circuit protection detection.

[0046] The thermal safety protection detection unit 330 is used to perform heating failure detection, temperature protection detection and thermal runaway propagation detection on the battery pack to be detected based on a simulated heat source to obtain a thermal safety protection detection result.

[0047] Heating failure detection refers to simulating local overheating of the battery pack (such as heating plate failure or poor heat dissipation) through a built-in heating device or an external heat source, monitoring the temperature sensor response, BMS thermal management strategy (such as cooling fan startup and charging current limiting) and thermal runaway warning function, and verifying the effectiveness of the thermal protection threshold and the cooling system.

[0048] Temperature protection testing refers to: testing the battery pack's charge and discharge performance in high and low temperature environments (such as -40°C to 85°C), detecting whether the battery management system triggers temperature protection (such as stopping charging and discharging) under extreme temperatures, and evaluating the reliability of the thermal management system.

[0049] Thermal runaway propagation testing refers to: simulating the thermal runaway scenario of a single battery cell, testing whether the fire protection structure of the battery pack (such as insulation materials and explosion-proof valves) can suppress heat propagation, and verifying whether the safety design complies with safety standards such as GB 38031.

[0050] The insulation detection unit 340 is configured to apply a target pressure having a pressure value greater than a pressure threshold to the battery pack to be detected, and obtain the insulation resistance of the battery pack to be detected under the target pressure.

[0051] The pressure threshold can be set according to actual application scenarios. In a specific embodiment, the pressure threshold is 500V DC.

[0052] The safety protection performance detection module 300 proposed in the embodiment of the present invention realizes detection under abnormal or dangerous conditions by verifying whether the protection logic of the battery pack to be tested is triggered in a timely and effective manner under abnormal or dangerous conditions, thereby preventing serious accidents such as thermal runaway, fire, and electric shock.

[0053] In some embodiments of the present invention, Figure 4 As shown, the environmental adaptability detection module 400 includes a temperature and humidity cycle detection unit 410, a mechanical strength detection unit 420 and a waterproof and dustproof detection unit 430; The temperature and humidity cycle detection unit 410 is used to obtain the performance stability index value of the battery pack to be tested in the temperature and humidity cycle when placed in a high and low temperature alternating hot and humid environment temperature box.

[0054] In a specific embodiment of the present invention, the high and low temperature alternating humid heat environment temperature box can provide a temperature of -30°C to 60°C and a humidity of 95%, which is used to simulate storage, transportation and working conditions under different climatic conditions, and detect performance stability indicators such as capacity attenuation and internal resistance change of the battery pack to be tested in the temperature and humidity cycle.

[0055] The mechanical strength testing unit 420 is used to simulate vibration conditions and impact conditions based on a vibration table, and to test the mechanical properties of the battery pack to be tested under the vibration conditions and impact conditions.

[0056] The vibration working condition may be sinusoidal vibration or random vibration, and the impact working condition may be falling or collision.

[0057] Specifically, the mechanical properties include but are not limited to whether the internal connections of the battery pack to be tested are loose, whether the shell is deformed, etc.

[0058] It should be noted that the mechanical strength detection unit 420 can also detect the extrusion condition, that is, simulate the battery pack to be tested being squeezed by external mechanical force, verify the ability of the shell, battery cells and internal circuits to resist mechanical damage, and ensure the reliability of the safety protection structure.

[0059] The waterproof and dustproof detection unit 430 is used to detect the waterproof and dustproof performance of the battery pack to be detected under different IP levels.

[0060] Among them, different IP levels are used to simulate rainy days, muddy road conditions and other environments to detect the sealing of the battery pack to be tested, avoiding the intrusion of water vapor and dust that may cause short circuits or performance degradation.

[0061] The environmental adaptability detection module 400 proposed in the embodiment of the present invention realizes functional detection of the battery to be tested under extreme temperature changes, humidity, harsh transportation conditions, etc., and realizes detection of its performance stability, sealing and structural integrity.

[0062] From the above description, it can be seen that the battery management system (BMS) needs to participate in the above detection process, but the above detections all assume that the BMS performance is intact. Based on this premise, the detection of the above detection items is realized. The reliable performance of the BMS is the premise of the reliability of the above detection. Therefore, in order to ensure the performance of the BMS, in some embodiments of the present invention, such as Figure 5 As shown, the battery management system function detection module 500 includes a protocol detection unit 510 and a function detection unit 520; The protocol detection unit 510 is used to send legal messages and illegal messages that comply with a set protocol to the battery management system, obtain a first response message from the battery management system, and obtain a protocol detection result based on the first response message.

[0063] Specifically, the protocol detection result can be obtained by analyzing the data length, data content and response time of the first response message.

[0064] The function detection unit 520 is used to send a simulated fault message and a control message to the battery management system, obtain a second response message from the battery management system, and obtain a function detection result based on the second response message.

[0065] Among them, the simulated fault message refers to the simulated message when the battery pack to be detected has a fault. The simulated fault message includes but is not limited to more than 30 fault codes such as abnormal voltage signal and abnormal sensor signal.

[0066] The control messages include but are not limited to charge / discharge permission / prohibition messages, balancing messages, etc.

[0067] The embodiments of the present invention can fully verify the functions of the battery management system by testing the protocols and functions of the battery management system, further improve the comprehensiveness of the test items of the battery pack to be tested, and improve the accuracy of the test report.

[0068] In some embodiments of the present invention, Figure 6 As shown, the data management and analysis module 600 includes a data storage unit 610, a data analysis unit 620 and a report generation unit 630; The data storage unit 610 is used to store basic electrical performance test results, safety protection performance test results, environmental adaptability test results, battery management system function test results and test process data.

[0069] In addition to storing the detection results of the above-mentioned multiple functional detection modules, the embodiment of the present invention also stores the detection process data, which increases the diversity and comprehensiveness of the stored data, and can provide a solid data foundation for the subsequent data analysis unit 620 to improve the accuracy of the detection and analysis results.

[0070] The detection process data may be sensor detection data during the detection process of each detection module, including but not limited to temperature data, voltage data, current data, response time, detection accuracy, etc.

[0071] The data analysis unit 620 is used to analyze the detection process data, basic electrical performance test results, safety protection performance test results, environmental adaptability test results, and battery management system function test results based on a preset machine learning algorithm to obtain detection analysis results.

[0072] Among them, the machine learning algorithm is an algorithm used to construct a nonlinear mapping relationship between multiple detection results and detection analysis results. It can be any mature algorithm and is not specifically limited here.

[0073] The report generating unit 630 is used to generate a test report based on a preset report template and the test analysis results.

[0074] Specifically, the report template includes test items, judgment criteria, test results corresponding to the test items, test conclusions, etc. By filling the corresponding information in the test analysis results into the report template, a test report can be obtained.

[0075] In actual application scenarios, due to the margin in the judgment criteria of test items, there may be a problem where there are no abnormal items in the test report, but there may be a risk of failure in the future. In order to handle this scenario, in some embodiments of the present invention, Figure 6 As shown, the data management and analysis module 600 further includes a fault prediction unit 640 and a fault prevention plan unit 650; The fault prediction unit 640 is used to input the detection process data, basic electrical performance test results, safety protection performance test results, environmental adaptability test results, and battery management system function test results into the fault prediction model to obtain a fault prediction result; The fault contingency plan unit 650 is used to perform matching in the contingency plan database based on the fault prediction result to obtain a target fault contingency plan corresponding to the fault prediction result.

[0076] The similarity between the fault prediction result and the fault results in the plan database can be calculated, and the fault plan corresponding to the fault result with the highest similarity can be used as the target fault plan.

[0077] The embodiment of the present invention predicts the faults of the battery pack to be detected by setting a fault prediction model and matches the corresponding target fault plan based on the fault prediction result, so as to make a risk plan for the battery pack to be detected in advance and improve its safety.

[0078] To facilitate quality traceability, in some embodiments of the present invention, Figure 6 As shown, the data management and analysis module 600 further includes a traceability unit 660; The traceability unit 660 is used to obtain the unique identification code of the battery pack to be tested and establish a binding relationship between the unique identification code and the test report.

[0079] By binding the test report with the unique identification code of the battery pack to be tested, the embodiment of the present invention can associate all test data and test reports through the unique identification code, thereby facilitating quality traceability and analysis.

[0080] In order to realize the detection of the whole life cycle of the battery pack to be detected, in some embodiments of the present invention, such as Figure 1 As shown, the multifunctional testing device 10 for the battery pack further includes a long-term life detection module 700: The long-term life detection module 700 is used to detect the cycle service life of the battery pack to be detected and obtain a long-term life detection result.

[0081] Specifically, the cycle service life testing process is: subject the battery pack to be tested to long-term charge and discharge cycles (such as 100 cycles), detect the capacity decay rate and performance stability, and evaluate whether the service life of the battery pack to be tested meets the design requirements.

[0082] In summary, the multifunctional battery pack testing equipment provided by the embodiments of the present invention integrates multiple key functions, covering a full range of verification requirements, from basic electrical performance, safety protection mechanisms, environmental adaptability, mechanical reliability, long-term lifespan, to BMS intelligent management. By performing these multifunctional tests on the battery pack under test, the quality, safety, and reliability of the battery pack under test can be guaranteed.

[0083] Correspondingly, an embodiment of the present invention further provides a method for using a multifunctional detection device for a battery pack, wherein the multifunctional detection device for a battery pack is the multifunctional detection device for a battery pack in any of the above embodiments, such as Figure 7 As shown, the method of using the multifunctional testing device for the battery pack includes: S701. Perform basic electrical performance testing, safety protection performance testing, environmental adaptability testing, and battery management system function testing on the battery pack to be tested placed on the testing platform to obtain multi-function test results. S702. Comprehensively analyze and judge the multi-functional test results and generate a test report.

[0084] It should be noted that the detection process of each detection item in the method of using the multifunctional detection device of the battery pack provided in the above embodiment can refer to the technical solution described in the embodiment of the multifunctional detection device of the battery pack, and will not be described one by one here.

[0085] The above is a detailed introduction to the multifunctional detection device for a battery pack and its use method provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A multifunctional testing device for battery packs, characterized in that: include: Testing platform, used to carry the battery pack to be tested; A basic electrical performance testing module is used to test the charge and discharge performance, internal resistance and consistency of the battery pack to be tested and obtain basic electrical performance test results; A safety protection performance detection module is used to detect the overcharge / over-discharge protection performance, short-circuit protection performance, thermal safety protection performance and insulation performance of the battery pack to be detected, and obtain safety protection performance detection results; An environmental adaptability testing module is used to test the performance stability, mechanical strength, and waterproof and dustproof performance of the battery to be tested in temperature and humidity cycles to obtain environmental adaptability test results; The battery management system function detection module is used to detect the functional integrity of the battery management system and obtain the battery management system function detection results; The data management and analysis module is used to comprehensively analyze the basic electrical performance test results, safety protection performance test results, environmental adaptability test results and battery management system function test results to generate a test report.

2. The multifunctional testing device for battery pack according to claim 1, characterized in that: The basic electrical performance detection module includes a charge and discharge performance detection unit, an internal resistance detection unit and a current / voltage consistency detection unit; The charge and discharge performance detection unit is used to detect the standard charge and discharge performance of the battery pack to be detected based on a standard charge simulation power supply and a standard discharge scheme, detect the fast charge performance of the battery pack to be detected based on a fast charge simulation power supply, and detect the dynamic charge and discharge performance of the battery pack to be detected based on a dynamic charge simulation power supply and a dynamic discharge scheme, to obtain a charge and discharge detection result; The internal resistance detection unit is used to measure the internal resistance of the battery pack to be detected based on an AC impedance method or a DC discharge method to obtain an internal resistance detection result; The current / voltage consistency detection unit is used to detect the voltage and current of each single battery in the battery pack to be detected, and determine the current / voltage consistency of the battery pack to be detected based on the voltage and the current.

3. The multifunctional testing device for battery pack according to claim 1, characterized in that: The safety protection performance detection module includes an overcharge / over-discharge protection detection unit, a short circuit protection detection unit, a thermal safety protection detection unit and an insulation detection unit; The overcharge / over-discharge protection detection unit is used to perform overcharge protection detection and over-discharge protection detection on the battery pack to be detected based on the overcharge detection scheme and the over-discharge detection scheme respectively, and obtain an overcharge / over-discharge protection detection result; The short-circuit protection detection unit is used to perform internal short-circuit protection detection and load short-circuit protection detection on the battery pack to be detected based on the internal short-circuit simulation signal and the load short-circuit simulation signal to obtain a short-circuit detection result; The thermal safety protection detection unit is used to perform heating failure detection, temperature protection detection and thermal runaway propagation detection on the battery pack to be detected based on a simulated heat source to obtain a thermal safety protection detection result; The insulation detection unit is used to apply a target pressure having a pressure value greater than a pressure threshold to the battery pack to be detected, and obtain the insulation resistance of the battery pack to be detected under the target pressure.

4. The multifunctional testing device for battery pack according to claim 1, characterized in that: The environmental adaptability detection module includes a temperature and humidity cycle detection unit, a mechanical strength detection unit, and a waterproof and dustproof detection unit; The temperature and humidity cycle detection unit is used to obtain the performance stability index value of the battery pack to be tested in the temperature and humidity cycle when placed in a high and low temperature alternating hot and humid environment temperature box; The mechanical strength testing unit is used to simulate vibration conditions and impact conditions based on a vibration table, and to test the mechanical properties of the battery pack to be tested under the vibration conditions and the impact conditions; The waterproof and dustproof detection unit is used to detect the waterproof and dustproof performance of the battery pack to be detected under different IP levels.

5. The multifunctional testing device for battery pack according to claim 1, characterized in that: The battery management system function detection module includes a protocol detection unit and a function detection unit; The protocol detection unit is used to send legal messages and illegal messages that comply with a set protocol to the battery management system, obtain a first response message from the battery management system, and obtain a protocol detection result based on the first response message; The function detection unit is used to send a simulated fault message and a control message to the battery management system, obtain a second response message from the battery management system, and obtain a function detection result based on the second response message.

6. The multifunctional battery pack detection device according to any one of claims 1 to 5, characterized in that: The data management and analysis module includes a data storage unit, a data analysis unit and a report generation unit; The data storage unit is used to store the basic electrical performance test results, safety protection performance test results, environmental adaptability test results, battery management system function test results and test process data; The data analysis unit is used to analyze the detection process data, the basic electrical performance test results, the safety protection performance test results, the environmental adaptability test results, and the battery management system function test results based on a preset machine learning algorithm to obtain a detection analysis result; The report generating unit is used to generate the detection report based on a preset report template and the detection analysis result.

7. The multifunctional testing device for battery pack according to claim 6, characterized in that: The data management and analysis module also includes a fault prediction unit and a fault plan unit; The fault prediction unit is used to input the detection process data, the basic electrical performance test results, the safety protection performance test results, the environmental adaptability test results, and the battery management system function test results into a fault prediction model to obtain a fault prediction result; The fault contingency plan unit is used to perform matching in a contingency plan database based on the fault prediction result to obtain a target fault contingency plan corresponding to the fault prediction result.

8. The multifunctional testing device for battery pack according to claim 6, characterized in that: The data management and analysis module also includes a traceability unit; The traceability unit is used to obtain the unique identification code of the battery pack to be tested and establish a binding relationship between the unique identification code and the test report.

9. The multifunctional testing device for battery pack according to claim 1, characterized in that: The device also includes a long-term life detection module: The long-term life detection module is used to detect the cycle service life of the battery pack to be detected and obtain a long-term life detection result.

10. A method for using a multifunctional battery pack detection device, characterized in that: The multifunctional detection device for a battery pack is the multifunctional detection device for a battery pack according to any one of claims 1 to 9, and the method of using the device comprises: Perform basic electrical performance testing, safety protection performance testing, environmental adaptability testing, and battery management system function testing on the battery pack to be tested placed on the testing platform to obtain multifunctional test results; Comprehensively analyze and judge the multifunctional detection results and generate a detection report.

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