Battery safety test system

Abstract

The invention relates to the technical field of battery testing, and discloses a battery safety testing system which comprises a dynamic loading system used for performing safety testing on a to-be-tested battery according to a target testing instruction; the central control system is connected with the dynamic loading system and is used for searching corresponding target test data from a pre-established standard file according to the battery type of the battery to be tested and the current test type, generating a corresponding target test instruction from the target test data and sending the target test instruction to the dynamic loading system; the standard file comprises test data in one-to-one correspondence with different battery types under different test types, and the test data comprises test parameters and test tool parameters. Therefore, the consistency of each test can be effectively kept, and the comparability of test results is improved. Meanwhile, the automation level and the intelligence level of testing can be improved, the testing efficiency and accuracy are improved, and errors caused by manual operation are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery testing, and in particular to a battery safety testing system. BACKGROUND

[0002] As a core component in modern electronic devices, the safety of a battery is of great importance. The safety testing of a battery includes evaluating the performance of the battery under extreme conditions, such as needle puncture, extrusion, etc., to ensure that the battery can work stably and safely under extreme use environments.

[0003] However, the conventional battery safety testing method relies on manual operation, and the conditions and methods of each test may be different. Many testing devices have complex setting and adjustment parameters, which need to be adjusted manually according to the specific requirements of the test object. For example, the needle puncture test needs to select appropriate needle puncture tools according to the size and type of the battery, and the extrusion test needs to adjust the pressure and time according to the structure and tolerance of the battery. These manual adjustment processes are prone to human error, and it is difficult to ensure the accuracy and consistency of each test. SUMMARY

[0004] Therefore, the present application provides a battery safety testing system to solve the problem of inconsistency in the needle puncture and extrusion safety testing of a battery in the prior art.

[0005] In a first aspect, the present application provides a battery safety testing system, which comprises:

[0006] a dynamic loading system for performing safety testing on a battery to be tested according to target testing instructions;

[0007] a central control system connected to the dynamic loading system, for searching corresponding target testing data from a pre-established standard file according to the battery type of the battery to be tested and the current testing type, and sending the target testing data to the dynamic loading system to generate corresponding target testing instructions; the standard file includes one-to-one testing data of different battery types under different testing types, and the testing data includes testing parameters and testing tool parameters.

[0008] According to the present application, the target testing data corresponding to the battery type of the battery to be tested and the current testing type is searched from the pre-established standard file, so that the dynamic loading system performs battery safety testing according to the target testing data determined by the search, which can effectively maintain the consistency of each test and increase the comparability of the test results. At the same time, it can also improve the automation and intelligence level of the test, improve the test efficiency and accuracy, and reduce the error caused by human operation.

[0009] In an optional embodiment, the dynamic loading system comprises:

[0010] The multi-degree-of-freedom mechanical arm is configured to grasp the target test head corresponding to the battery to be tested in response to a test tool grasping instruction in the target test instruction, and to perform a needle test on the battery to be tested in response to a test parameter instruction in the target test instruction.

[0011] In this embodiment, the multi-degree-of-freedom mechanical arm can simulate needle tests at different angles and simulate different types of foreign object penetration, thereby being suitable for a variety of different test tasks and having high flexibility. In addition, the multi-degree-of-freedom mechanical arm can continuously perform a large number of tests, thereby saving a large amount of manual time, effectively ensuring test consistency, avoiding errors in manual operation, and ensuring the safety of test personnel.

[0012] In an alternative embodiment, the dynamic loading system comprises:

[0013] The intelligent three-dimensional hydraulic platform is configured to perform an extrusion test on the battery to be tested in response to a hydraulic instruction in the target test instruction.

[0014] In this embodiment, the intelligent three-dimensional hydraulic platform can provide multi-directional extrusion tests, simulate extreme situations in different scenarios, and has high test flexibility. In addition, through an automated test process, consistency under the same test data can be effectively ensured, and the efficiency and accuracy of safety testing can be improved. At the same time, the safety during the test process is ensured, and the safety of the test personnel is ensured.

[0015] In an alternative embodiment, the intelligent three-dimensional hydraulic platform further comprises:

[0016] The vibration module is arranged on the intelligent three-dimensional hydraulic platform and is electrically connected to the intelligent three-dimensional hydraulic platform, and is configured to generate vibrations during the extrusion test.

[0017] In this embodiment, by adjusting the frequency of the vibration module, the vibration state under different environments can be accurately simulated, the authenticity of the battery safety test is improved, and the test result is more accurate.

[0018] In an alternative embodiment, the battery safety test system further comprises:

[0019] The multi-sensing monitoring system is connected to the central control system and is configured to monitor multi-dimensional parameters during the battery safety test and send the multi-dimensional parameters to the central control system.

[0020] In this embodiment, the multi-sensor monitoring system can monitor different parameters of the battery in real time during the battery safety test, conduct comprehensive data monitoring of the test process, and transmit the data to the central control system for centralized processing and analysis. Through this integrated monitoring, the accuracy and reliability of the test can be ensured, and the comprehensiveness of the battery safety evaluation can be improved.

[0021] In an alternative embodiment, the multi-sensor monitoring system comprises:

[0022] A voltage acquisition device for acquiring voltage information of the battery to be tested in real time and sending the voltage information to the central control system;

[0023] An infrared thermal imaging device for acquiring temperature change information of the battery to be tested in real time and sending the temperature change information to the central control system;

[0024] An X-ray imaging device for detecting internal structure information of the battery to be tested during the safety test process in real time and sending the voltage information to the central control system;

[0025] A laser displacement device for detecting deformation information of the battery to be tested during the safety test process in real time and sending the deformation information to the central control system;

[0026] A gas analysis device for analyzing whether harmful gases are released by the battery to be tested during the safety test process in real time and sending the analysis result information to the central control system.

[0027] In this embodiment, by integrating different high-precision sensing devices into a multi-sensor monitoring system, the performance and safety of the battery can be comprehensively and real-time monitored and analyzed during the test process, which helps to early detect abnormal behavior and potential risks of the battery during the safety test and prevent safety hazards caused by the battery test.

[0028] In an alternative embodiment, the battery safety test system further comprises:

[0029] An intelligent safety system connected to the central control system for starting a safety response according to a safety protection signal sent by the central control system; the safety protection signal is generated by the central control system according to the received multi-dimensional parameters.

[0030] In this embodiment, through multi-dimensional real-time monitoring and analysis, the system can detect potential risks at an early stage and then start corresponding safety measures, which can greatly improve the safety guarantee capability and reduce the probability of accidents.

[0031] In an alternative embodiment, the intelligent safety system comprises:

[0032] The exhaust gas collecting device is used for collecting the gas generated by the battery to be tested during the safety test process.

[0033] The exhaust gas collecting device is further provided with an exhaust gas purification device for purifying harmful gas.

[0034] In the embodiment, the safety of the battery test process is guaranteed, and the personal safety of the tester is effectively protected by providing the exhaust gas collecting device and the four-stage exhaust gas purification device in the intelligent safety system.

[0035] In an alternative embodiment, the intelligent safety system further comprises:

[0036] The inert gas fire extinguishing device is used for extinguishing the fire source by using inert gas.

[0037] In the embodiment, the inert gas fire extinguishing device can quickly and effectively extinguish the fire source, prevent the spread of fire, avoid damage to the test equipment, and ensure the personal safety of the tester.

[0038] In an alternative embodiment, the battery safety test system further comprises:

[0039] The explosion-proof isolation cabin is provided with the dynamic loading system and the inert gas fire extinguishing device.

[0040] In the embodiment, the safety test of the battery is carried out in the explosion-proof isolation cabin. Once an explosion or fire occurs, the closed structure of the explosion-proof isolation cabin can prevent the fire source, shock wave and harmful gas from leaking to the external environment. At the same time, the inert gas fire extinguishing device quickly stops the spread of fire, ensuring the safety of the equipment and the tester. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 is a structural schematic diagram of a battery safety test system according to an embodiment of the present application;

[0043] Figure 2 is a flowchart of exhaust gas purification according to an embodiment of the present application;

[0044] Figure 3 is a timing diagram of a battery safety test process according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] At present, in the process of battery safety test, battery needle and extrusion test is the core experimental method to evaluate the safety of lithium ion battery, which can simulate extreme abuse scene, expose potential risk, prevent thermal runaway and avoid catastrophic consequences. At the same time, through the test, the safety of consumers' life and property can be guaranteed. But the present test method still has certain limitations, mainly including the following aspects:

[0047] 1. Operation level: At present, due to the non-uniformity of test standard parameters, the comparability of results is poor; specifically, the needle parameters differ greatly, the general steel needle diameter is 3mm-8mm; the penetration speed is 25mm / s in the national standard, and 5mm / s-100mm / s in practice; due to the lack of global unified standard for needle angle, the extrusion test direction is also not uniform, cylindrical battery needs to be extruded parallel to the plate, square battery only tests the wide surface, etc. In addition, the fixture design and positioning accuracy are also insufficient, which leads to unstable battery fixation. In traditional test, the battery is simply placed, and when the needle is pierced, the internal gas expansion leads to displacement, the steel needle deviates from the predetermined position (such as the weak area of the diaphragm), which greatly affects the accuracy of short-circuit point.

[0048] 2. Lack of safety protection and pollutant treatment: In needle / extrusion, the battery may splash electrolyte and release toxic smoke (such as HF), but most equipment does not integrate real-time smoke filtration system, relying only on laboratory ventilation, and the operator is exposed to chemical risk. In addition, the efficiency of the fire extinguishing device is also insufficient, for example, although the horizontal equipment can extinguish fire by sinking water, the battery pack is damaged after being immersed in water, which hinders the analysis of failure mechanism.

[0049] 3. Technical inherent defects: (1) Poor repeatability and controllability of testing, high randomness of needle puncture test: the steel needle may be wrapped by active substances when puncturing the separator, causing short-circuit resistance fluctuation, and the dispersion degree of multiple test results of the same battery is high. While the controllability of heat triggered heat diffusion is better, but it is questioned whether it can completely replace the authenticity of needle puncture. (2) The current equipment mainly uses one-way static extrusion (such as the semi-cylindrical pressure head required by the national standard), which cannot reproduce the torsional deformation of the battery monomer and battery pack in the accident and collision. (3) High cost and low efficiency of destructive testing, a complete battery is consumed for a single test (the cost of module-level testing is more than 10,000 yuan), and the equipment compatibility is poor. For example, solid-state batteries and power batteries require different range equipment, and the customized demand increases the cost. (4) Monitoring means lags behind failure dynamics: temperature rise monitoring delay: the interlayer thermal conductivity of soft package battery is poor, and the external thermocouple response lags behind when internal thermal runaway occurs, resulting in insufficient fire warning time; insufficient voltage sampling rate: the voltage sampling rate of traditional equipment is ≤10Hz, which is difficult to capture the microsecond-level voltage drop in the early stage of internal short circuit (such as the current collector melting feature); insufficient adaptability of high-energy batteries: nickel-cobalt-manganese (NCM) 811, silicon-carbon negative electrode and other high-energy systems have poor thermal stability, and the ceramic coating of the separator may be instantaneously punctured during needle puncture, and traditional testing cannot quantify the "safety margin"; solid-state batteries have no liquid electrolyte, and there may be no short-circuit current during needle puncture, which is not suitable for existing test standards.

[0050] In view of this, a battery safety test system is provided in the embodiment, Figure 1 is a structural schematic diagram of a battery safety test system according to an embodiment of the application, which comprises a dynamic loading system and a central control system, as follows.

[0051] The dynamic loading system is used for safety testing of the battery to be tested according to the target test instruction.

[0052] The central control system is connected with the dynamic loading system, and is used for finding the corresponding target test data from the pre-established standard file according to the battery type and the current test type of the battery to be tested, and sending the target test data to the dynamic loading system to generate the corresponding target test instruction; the standard file includes test data corresponding one by one for different battery types under different test types, and the test data includes test parameters and test tool parameters.

[0053] The safety test types mainly targeted in the embodiment are needle puncture test and extrusion test, and the dynamic loading system mainly includes a needle puncture device for needle puncture test and an extrusion device for extrusion test.

[0054] Battery needle test is mainly used to simulate the situation when the battery is pierced by an external sharp object, to check whether there will be a short circuit, fire or explosion inside the battery. For example, when the battery is pierced by a foreign object, it may cause internal electrolyte leakage, gas expansion, and even trigger thermal runaway, resulting in fire or explosion and other safety hazards. During the test, a needle tool is used to pierce the battery at a certain speed and force. Then monitor whether the battery has internal short circuit, rapid temperature rise, smoke or fire, etc.

[0055] Battery extrusion test is to simulate the safety of the battery when it is pressed or extruded by an external object by applying external force to the battery. It is mainly used to simulate the situation that may occur during transportation or physical impact. During the test, the battery is placed between two parallel pressure plates, and a certain pressure is applied, usually gradually increasing the pressure until the battery deforms or is damaged inside. Then monitor whether the battery has liquid leakage, heating, swelling, smoking or explosion, etc.

[0056] Battery types such as lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries, etc., each have different chemical compositions, working principles and safety risks. For example, lithium-ion batteries are more prone to thermal runaway in the case of overcharging, short circuit, and high temperature, so special attention should be paid to the temperature, pressure and current parameters during the test. Test types mainly include needle test and extrusion test.

[0057] The target test data usually includes specific test parameters for each battery type and test type, such as the size of the test head selected, the piercing direction, the piercing depth, the piercing force, etc., and the test pressure head selected is a flat or curved pressure head, the extrusion force, etc. These data are usually defined in pre-established standard files, and each test type is clearly marked with which parameters should be used for testing. The standard file in this embodiment integrates the ISO (International Organization for Standardization) / GB (Chinese national standard) / UL (American safety testing and certification standard) standard parameter library, and supports one-key switching of test mode.

[0058] In this embodiment, the target test data is found from the pre-established standard file according to the battery type of the battery to be tested and the current test type, so that the dynamic loading system performs battery safety testing according to the target test data determined by the search, which can effectively maintain the consistency of each test and increase the comparability of the test results. At the same time, it can also improve the automation and intelligence level of the test, improve the test efficiency and accuracy, and reduce the errors caused by human operation.

[0059] In some optional embodiments, the dynamic loading system comprises:

[0060] The multi-degree-of-freedom robot arm is used for clamping a target test head corresponding to a battery to be tested in response to a test tool clamping instruction in a target test instruction, and is also used for performing a needle test on the battery to be tested in response to a test parameter instruction in the target test instruction.

[0061] The multi-degree-of-freedom robot arm in the embodiment can be a six-degree-of-freedom robot arm. The six-degree-of-freedom robot arm can move in three-dimensional space, that is, can move along X, Y and Z directions and can rotate around each axis, and can realize space arbitrary path loading, such as simulation of collision torsion deformation. Different directions of puncture angles and puncture forces can be simulated through the six-degree-of-freedom robot arm. The six-degree-of-freedom robot arm can be used to repeatedly perform the same operation according to preset test parameters, and each test can be realized through programmatic control of the robot arm, which can effectively ensure the standardization of the test.

[0062] In addition, according to the test instructions generated by the central control system, such as the test tool clamping instruction and the test parameter instruction, the multi-degree-of-freedom robot arm can clamp the corresponding test head, such as a 5mm test steel needle, from the tool table, and then puncture from the required battery angle at the required test speed according to the test parameter instruction, such as 25mm / s from the side of the battery. The test head also has a built-in piezoelectric sensor that can provide real-time feedback of contact force (accuracy ±0.05N).

[0063] In the embodiment, the multi-degree-of-freedom robot arm can simulate needle test at different angles and simulate puncture of different types of foreign matter, which can adapt to a variety of different test tasks and has strong flexibility. In addition, the multi-degree-of-freedom robot arm can continuously perform large-scale tests, saving a large amount of manual time, effectively ensuring the consistency of the test, avoiding errors in manual operation, and ensuring the safety of the test personnel.

[0064] In some optional embodiments, the dynamic loading system includes:

[0065] The intelligent three-dimensional hydraulic platform is used for performing an extrusion test on a battery to be tested in response to a hydraulic instruction in a target test instruction.

[0066] The intelligent three-dimensional hydraulic platform in the embodiment can independently or in combination move in X, Y and Z directions, provide different extrusion actions, and support multi-directional extrusion tests. The intelligent three-dimensional hydraulic platform can also accurately control the applied force, extrusion speed and direction according to the received hydraulic instruction, to ensure the accuracy and consistency of the test process.

[0067] In addition, the intelligent three-dimensional hydraulic platform in the embodiment can replace the pressure head, such as a curved or flat pressure head, for the intelligent three-dimensional hydraulic platform by clamping different test heads. The replacement of the pressure head can be performed by the multi-degree-of-freedom robot arm according to the received test instruction.

[0068] In this embodiment, the intelligent three-dimensional hydraulic platform can provide multi-directional extrusion testing, simulate extreme conditions under different scenarios, and has strong testing flexibility. In addition, through the automated testing process, consistency under the same test data can be effectively guaranteed, and the efficiency and accuracy of safety testing can be improved. At the same time, the safety during testing is also ensured, and the personal safety of the test personnel is guaranteed.

[0069] In some optional embodiments, the intelligent three-dimensional hydraulic platform further comprises:

[0070] A vibration module is arranged on the intelligent three-dimensional hydraulic platform and electrically connected thereto, and is used to generate vibration during extrusion testing.

[0071] The vibration module in this embodiment can be embedded inside the intelligent three-dimensional hydraulic platform or arranged on the surface of the intelligent three-dimensional hydraulic platform. The vibration module is adjustable in frequency from 5Hz to 50Hz, and can simulate the driving vibration of an electric vehicle under different environments.

[0072] In this embodiment, by adjusting the frequency of the vibration module, the vibration state under different environments can be accurately simulated, the authenticity of battery safety testing is improved, and the test results are more accurate.

[0073] In some optional embodiments, the battery safety testing system further comprises:

[0074] A multi-sensing monitoring system is connected to the central control system and is used to monitor multi-dimensional parameters during battery safety testing and send the multi-dimensional parameters to the central control system.

[0075] In this embodiment, the multi-sensing monitoring system can monitor different parameters of the battery in real time during battery safety testing, conduct comprehensive data monitoring of the testing process, and transmit the data to the central control system for centralized processing and analysis. Through such integrated monitoring, the accuracy and reliability of the test can be ensured, and the comprehensiveness of battery safety evaluation is improved.

[0076] In some optional embodiments, the multi-sensing monitoring system comprises:

[0077] A voltage acquisition device is used to acquire voltage information of the battery to be tested in real time and send the voltage information to the central control system.

[0078] The voltage acquisition device mainly monitors the voltage fluctuation of the battery through high-precision sensors such as microsecond-level sensors, and can capture abnormal fluctuations of the battery during safety testing. The acquired voltage information is sent to the central control system in real time to monitor the working state of the battery in real time, and an alarm is triggered or corresponding protective measures are taken when the voltage is abnormal.

[0079] An infrared thermal imaging device is used to collect temperature change information of the battery to be tested in real time and send the temperature change information to the central control system.

[0080] The infrared thermal imaging device in this embodiment uses infrared thermal imaging technology to non-contact monitor the temperature of the battery during the test process. The collected data is fed back to the central control system for analysis.

[0081] An X-ray imaging device is used to detect internal structure information of the battery to be tested in real time during the safety test process and send the voltage information to the central control system.

[0082] The X-ray imaging device in this embodiment uses X-ray imaging technology to penetrate the shell of the battery and obtain its internal structure and state information, especially whether there is a short circuit, crack, bubble or other damage in the battery. The X-ray imaging result is transmitted to the central control system in real time, and then the system analyzes the internal structure change and identifies potential structural problems generated during the test process.

[0083] A laser displacement device is used to detect deformation information of the battery to be tested in real time during the safety test process and send the deformation information to the central control system.

[0084] The laser displacement device in this embodiment can be a laser displacement sensor, which accurately detects the deformation of the battery under external pressure, vibration or other stress by emitting a laser beam and measuring the displacement of the reflected light. The deformation information can be used to evaluate whether the battery is excessively squeezed or damaged.

[0085] A gas analysis device is used to analyze whether harmful gases are released by the battery to be tested in real time during the safety test process and send the analysis result information to the central control system.

[0086] During the test process, the battery may release toxic gases such as hydrogen and carbon monoxide. The gas analysis device can detect the concentration of these harmful gases in real time. Then the collected data is sent to the central control system, and the system can judge whether there is danger according to the preset safety threshold to timely give a risk warning or take protective measures.

[0087] In this embodiment, different high-precision sensing devices are integrated into a multi-sensing monitoring system, so that the performance and safety of the battery can be comprehensively and real-time monitored and analyzed during the test process, which helps to early detect abnormal behavior and potential risks of the battery during the safety test and prevent safety hazards caused by battery testing.

[0088] In some optional embodiments, the battery safety test system further comprises:

[0089] The intelligent safety system is connected with the central control system, and is configured to start a safety response according to a safety protection signal sent by the central control system. The safety protection signal is generated by the central control system according to received multi-dimensional parameters.

[0090] The intelligent safety system in this embodiment includes a multi-stage safety protection process, including inert gas fire extinguishing, waste gas collection, and four-stage tail gas purification.

[0091] Through multi-dimensional real-time monitoring and analysis, the system can discover potential risks at an early stage, and then start corresponding safety measures, which can greatly improve the safety guarantee capability and reduce the probability of accidents.

[0092] In some optional embodiments, the intelligent safety system includes:

[0093] The waste gas collection device is configured to collect the gas generated by the battery to be tested during the safety test.

[0094] The waste gas collection device is further provided with a tail gas purification device, and the tail gas purification device is configured to purify harmful gas.

[0095] The waste gas collection device, as part of the intelligent safety system, is mainly used to collect harmful gases such as hydrogen, ammonia, and sulfur dioxide generated by the battery during the battery test. The waste gas collection device can effectively prevent the diffusion of these gases into the environment, thereby ensuring the safety of the working environment.

[0096] Specifically, the gas collection device includes a recovery pipeline and an adsorption system, as shown in Figure 2 After the battery triggers a heat runaway and is monitored by the infrared thermal imaging device and the gas analysis device, the central control system processes the data and determines that there is waste gas. In the case where it is confirmed that there is waste gas, the gas is quickly guided to the tail gas purification device. In this embodiment, a four-stage purification device is used. The four-stage purification device gradually removes harmful substances in the waste gas through different purification stages, including coarse filtration, activated carbon adsorption, plasma catalysis, high-efficiency filtration, and sterilization. This ensures that harmful substances in the waste gas can be effectively removed, ensuring that the final discharged gas has almost no pollutants and meets the requirements of environmental protection. The removal rate of hydrofluoric acid can reach more than 99%.

[0097] In this embodiment, by providing the waste gas collection device and the four-stage tail gas purification device in the intelligent safety system, a safe environmental guarantee is provided for the battery test process, effectively protecting the personal safety of the test personnel.

[0098] In some optional embodiments, the intelligent safety system further includes:

[0099] The inert gas fire extinguishing device is configured to extinguish the fire source using inert gas.

[0100] In the battery needle test and extrusion test, the battery is likely to cause fire and explosion risk when encountering external damage. In the case of detecting the presence of a fire source by an infrared thermal imaging device, the inert gas fire extinguishing device can be started instantly by the central control system to extinguish the fire source by inert gases such as nitrogen, argon, carbon dioxide, etc. to prevent the spread of fire. The protection response time of the inert gas fire extinguishing device can reach milliseconds, such as 30ms.

[0101] In this embodiment, the inert gas fire extinguishing device can quickly and effectively extinguish the fire source, prevent the spread of fire, avoid damage to the test equipment, and at the same time ensure the personal safety of the test personnel.

[0102] In some optional embodiments, the battery safety test system further comprises:

[0103] The explosion-proof isolation cabin, the dynamic loading system, and the inert gas fire extinguishing device are arranged in the explosion-proof isolation cabin.

[0104] In this embodiment, the safety test of the battery is carried out in the explosion-proof isolation cabin. Once an explosion or fire occurs, the airtight structure of the explosion-proof isolation cabin can prevent the fire source, shock wave, and harmful gas from leaking to the external environment. At the same time, the inert gas fire extinguishing device quickly stops the spread of fire, ensuring the safety of the equipment and the test personnel.

[0105] The exhaust gas collection device, the central control system, etc. can be arranged in the equipment room, i.e. outside the explosion-proof isolation cabin.

[0106] In some optional embodiments, the battery safety test system further comprises:

[0107] The circulating cooling system comprises a cooling unit and is connected to the central control system for cooling operation during the battery safety test.

[0108] This embodiment provides a complete battery safety test process. Referring to FIG. 6, which is a dynamic coupling test timing diagram, the details are as follows: Figure 3

[0109] The test process includes a loading phase, a monitoring phase, and a safety response phase. Each phase contains and couples with each other, which is illustrated as follows. Loading phase: initial positioning (0-0.5s), needle trigger (0.5-0.8s), superimposed vibration (0.8-2.8s), multi-directional extrusion (1.5-6.5s); Monitoring phase: voltage acquisition (0-6.5s), X-ray perspective (0.5-4.5s), thermal imaging scanning (0.3-4.8s); Safety response: gas detection (3.5-4.0s), fire extinguishing start (4.0-4.03s), tail gas purification (4.03-7.03s). ​

[0110] While embodiments of the present application have been described in conjunction with the appended drawings, various modifications and changes can be suggested by persons skilled in the art, and all such modifications and changes are believed to fall within the scope of the present application as defined by the appended claims.

Claims

1. A battery safety testing system, characterized by, The battery safety test system comprises: A dynamic loading system for performing safety test on the battery to be tested according to target test instructions; A central control system connected with the dynamic loading system, for searching corresponding target test data from a pre-established standard file according to the battery type of the battery to be tested and the current test type, and sending the target test data to the dynamic loading system in the form of corresponding target test instructions; the standard file comprises test data corresponding to different battery types under different test types, and the test data comprises test parameters and test tool parameters.

2. The battery safety testing system of claim 1, wherein, The dynamic loading system comprises: A multi-degree-of-freedom mechanical arm for clamping a target test head corresponding to the battery to be tested in response to a test tool clamping instruction in the target test instructions, and for performing a needle test on the battery to be tested in response to a test parameter instruction in the target test instructions.

3. The battery safety testing system of claim 1, wherein, The dynamic loading system comprises: An intelligent three-dimensional hydraulic platform for performing an extrusion test on the battery to be tested in response to a hydraulic instruction in the target test instructions.

4. The battery safety testing system of claim 3, wherein, The intelligent three-dimensional hydraulic platform further comprises: A vibration module arranged on the intelligent three-dimensional hydraulic platform and electrically connected with the intelligent three-dimensional hydraulic platform, for generating vibration during the extrusion test.

5. The battery safety testing system of claim 1, wherein, The battery safety test system further comprises: A multi-sensing monitoring system connected with the central control system, for monitoring multi-dimensional parameters in the battery safety test process and sending the multi-dimensional parameters to the central control system.

6. The battery safety testing system of claim 5, wherein, The multi-sensing monitoring system comprises: A voltage acquisition device for acquiring voltage information of the battery to be tested in real time and sending the voltage information to the central control system; An infrared thermal imaging device for acquiring temperature change information of the battery to be tested in real time and sending the temperature change information to the central control system; An X-ray imaging device for detecting internal structure information of the battery to be tested in real time during the safety test process and sending the voltage information to the central control system; A laser displacement device for detecting deformation information of the battery to be tested in real time during the safety test process and sending the deformation information to the central control system; A gas analysis device for analyzing whether harmful gas is released from the battery to be tested in real time during the safety test process and sending analysis result information to the central control system.

7. The battery safety testing system of claim 5, wherein, The battery safety test system further comprises: An intelligent safety system connected with the central control system, for starting a safety response according to a safety protection signal sent by the central control system; the safety protection signal is generated by the central control system according to the received multi-dimensional parameters.

8. The battery safety testing system of claim 7, wherein, The intelligent safety system comprises: An exhaust gas collection device for collecting gas generated during the safety test of the battery to be tested; The exhaust gas collection device further comprises an exhaust gas purification device for purifying harmful gas.

9. The battery safety testing system of claim 7 or 8, wherein, The intelligent safety system further comprises: An inert gas fire extinguishing device for extinguishing a fire source by using inert gas.

10. The battery safety testing system of claim 9, wherein, The battery safety test system further comprises: The explosion-proof isolation cabin, the dynamic loading system and the inert gas fire extinguishing device are arranged in the explosion-proof isolation cabin.

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