Double-temperature-zone test box for predicting cycle life failure of battery and use method of double-temperature-zone test box

Abstract

The invention provides a dual-temperature-zone test box for predicting battery cycle life failure, which comprises a test box assembly, an explosion door assembly, a test inner box assembly, a dual-temperature-zone door assembly, an electrical assembly and an operation control panel assembly.The dual-temperature-zone test box has the beneficial effects that the equipment is simple to operate, is provided with a touch display screen and an automatic control system, is convenient to use, and is suitable for popularization and application. High temperature and low temperature can be quickly switched, so that the test period is greatly shortened, and the working efficiency is improved; through the high-precision temperature sensor and the controller, the environmental test box can ensure the accuracy of temperature control; the equipment can also store multiple groups of test programs, so that a user can conveniently perform repeated tests, and the test efficiency is improved; long-time loop testing is not needed, so that the time cost is saved; according to the method, a specific battery cycle failure problem point can be locked, and compared with the prediction of the cycle life, the battery design can be optimized aiming at the specific problem point, so that the research and development period is greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and more particularly to a dual-temperature zone test chamber for predicting battery cycle life failure and its usage method. Background Technology

[0002] With the development of the new energy vehicle industry, the research, development, production and product testing of battery packs and battery controllers and other related equipment are constantly placing increasing demands on water-cooled temperature control equipment.

[0003] For example, to study and verify the performance of battery packs during charging and discharging, it is necessary to simulate the performance of battery packs and battery controllers under different air environmental conditions and different automotive antifreeze temperatures during various operating processes. Regarding the automotive antifreeze temperature range, current national standards and industry requirements generally specify a testing range between -40℃ and +100℃. However, due to the rapid development of this industry in recent years, traditional equipment is insufficient to meet the various new technical requirements of this rapidly evolving industry.

[0004] High and low temperature cycling test chambers (also known as high and low temperature cycle test chambers, high and low temperature test chambers, etc.) are mainly used for adaptability testing of electrical and electronic products, their components, and other materials during storage, transportation, and use in high and low temperature environments. They can generally be divided into programmable high and low temperature test chambers (touchscreen / button type) and single-point high and low temperature test chambers.

[0005] Existing high and low temperature cycling test chambers are often located in small spaces with slow air circulation. However, since the operation of the high and low temperature cycling test chamber generates a lot of heat, this heat tends to accumulate around the chamber in a poorly ventilated environment. This can lead to inadequate heat dissipation, circuit combustion problems, and consequently, material waste.

[0006] In modern society, battery technology has become an indispensable and crucial technology. Due to its high safety, long cycle life, and excellent environmental performance, batteries have become the widely used type of battery in electric vehicles and energy storage systems. However, batteries may experience electrical performance failures during use, which not only affect battery performance and lifespan but may also pose safety hazards. Therefore, how to quickly evaluate methods affecting battery cycle life and how to predict the causes of potential electrical performance failures during battery use have become urgent problems to be solved in the field of battery technology.

[0007] Existing technologies typically assess battery cycle life through cycle life testing. This testing method usually involves repeatedly charging and discharging the battery under constant current and temperature conditions until the battery capacity drops to a predetermined value, at which point the battery's cycle performance can be evaluated. While this method can accurately assess battery cycle life, it requires significant time and resources. In addition, some methods use preliminary cycle data combined with simulations to predict cycle life. Although this method can predict battery cycle life quickly and accurately, it cannot predict the specific issues affecting battery cycle life and does not provide effective support for quickly resolving problems during product development. Summary of the Invention

[0008] The purpose of this invention is to solve the aforementioned technical problems by providing a novel dual-temperature zone test chamber for predicting battery cycle life failure and its usage method. This equipment is simple to operate, equipped with a touch screen display and an automatic control system, making it convenient to use. It can quickly switch between high and low temperatures, greatly shortening the testing cycle and improving work efficiency. Through high-precision temperature sensors and controllers, the environmental test chamber ensures accurate temperature control. The equipment can also store multiple test programs, facilitating repeated testing and improving testing efficiency. It eliminates the need for lengthy cycle testing, saving time and costs. This invention can pinpoint specific battery cycle failure points, allowing for optimization of battery design based on specific problems, compared to cycle life prediction, significantly shortening the development cycle.

[0009] This invention is achieved through the following technical solution: A dual-temperature zone test chamber for predicting battery cycle life failure includes a test chamber assembly, an explosion-proof door assembly, a test inner chamber assembly, a dual-temperature zone door assembly, an electrical assembly, and an operation control panel assembly. The test inner chamber assembly is located inside the front end of the test chamber assembly, and the dual-temperature zone door assembly is located on the outer side wall of the test chamber assembly. The dual-temperature zone door assembly seamlessly connects and fastens the inner chamber assembly to the test chamber assembly. The electrical assembly is located on one inner side wall of the test chamber assembly, and the operation control panel assembly is located on the right front side of the test chamber assembly. The operation control panel assembly is electrically connected to the test inner chamber assembly, and the electrical assembly is electrically connected to the operation control panel assembly.

[0010] As a further step, the test chamber assembly includes a test chamber, a test chamber clamping component, a left side sealing plate of the test chamber, a side air guide plate of the test chamber, a test chamber test hole, a test chamber baffle, a rolled-edge impeller component, a finned heating tube mounting bracket, a finned heating tube, an evaporator, a right side sealing plate of the test chamber, and a rear sealing plate of the test chamber. The test chamber has a clamping cavity inside, and the test chamber clamping component is embedded in the clamping cavity inside the test chamber. A left side sealing plate of the test chamber is located on the inner left side wall of the test chamber, and the test chamber side air guide plate is installed on the test chamber... On the inner wall of the left side panel of the inner chamber, there are several inner chamber test holes at the rear end of the inner chamber. The rear end of the inner chamber is equipped with a rear panel, and a baffle is provided on one side of the rear panel. A rolled-edge impeller component is provided on the right side of the test holes. A finned heating tube mounting bracket is provided on the left side of the rolled-edge impeller component, and a finned heating tube is mounted on the mounting bracket. A right side panel is provided on the inner wall of the right side panel, and an evaporator is provided on the inner wall of the right side panel. The evaporator is electrically connected to the electrical components.

[0011] As a further step, the test chamber includes an inner left side panel, an inner bottom panel, an inner top panel, an inner right side panel, an inner test hole mounting component, an inner rear fixing component, an inner rear panel, and an inner wind baffle. The inner bottom panel has an inner left side panel and an inner right side panel on both sides, and an inner top panel is provided at the top between the inner left side panel and the inner right side panel. An inner rear panel is provided at the rear between the inner left side panel and the inner right side panel. An inner rear fixing component is provided on the left inner side wall of the inner rear panel. An inner test hole mounting component is provided on one side of the inner rear fixing component. An inner test hole is provided on the inner test hole mounting component. An inner wind baffle is provided on the right inner side wall of the inner rear panel. A rolled-edge impeller component is provided on the inner wind baffle.

[0012] As a further step, the test chamber fixture component includes a left bracket, a left slide rail mounting plate, a left slide rail, a right bracket, a right slide rail mounting plate, a right slide rail, a wiring fastener, a test fixture mounting plate, and a test fixture. The left bracket is mounted on the left side panel of the inner chamber, and the left bracket has a left slide rail mounting plate. The left slide rail mounting plate has a left slide rail. The right bracket is mounted on the right side panel of the inner chamber, and the right bracket has a right slide rail mounting plate. The right slide rail mounting plate has a right slide rail. A test fixture mounting plate is located between the left slide rail mounting plate and the right slide rail mounting plate. The test fixture mounting plate has a test fixture shelf, and the test fixture shelf has several sets of test fixture guide rails. Several test fixtures are mounted on the test fixture guide rails. A wiring fastener is located at the rear end of the test fixture mounting plate and is fixed to the lower part of the rear side panel of the inner chamber. The test fixture is electrically connected to the operation control panel component via a four-wire conductor.

[0013] As a further step, the test chamber assembly includes a frame assembly, a cooling assembly, a heat dissipation assembly, a power supply assembly, an inner side panel, an external air duct assembly, and a middle partition. The front end of the frame assembly has a test chamber mounting position, and the left and right slide rail mounting plates are respectively installed in the test chamber mounting position at the front end of the frame assembly. The rear end of the frame assembly has a power supply mounting position, and the power supply assembly is installed in the power supply mounting position at the rear end of the frame assembly. A cooling assembly is located to the left of the power supply assembly, and a middle partition is provided between the cooling assembly and the power supply assembly. An inner side panel is provided between the cooling assembly and the front end of the power supply assembly. An external air duct assembly is located on the right side of the top rear end of the frame assembly. A heat dissipation assembly is located at the rear end of the power supply assembly. The cooling assembly, heat dissipation assembly, power supply assembly, and external air duct assembly are electrically connected to the electrical assembly. The power supply assembly is electrically connected to the cooling assembly, heat dissipation assembly, and external air duct assembly. The power supply assembly is electrically connected to the operation control panel assembly. The test fixture is electrically connected to the power supply assembly.

[0014] As a further step, the operation control panel assembly includes an operation control panel, an operation control circuit board, an operation control display screen, a thermostatic programmable control display, operation control buttons, and an operation control emergency stop button. The operation control panel has a display mounting hole at its upper part, and the operation control display screen is embedded in the display mounting hole. The operation control circuit board is located inside the operation control panel. A thermostatic programmable control display mounting hole is located to the lower left of the display mounting hole, and the thermostatic programmable control display is embedded in the thermostatic programmable control display mounting hole. Several control button mounting holes are located below the thermostatic programmable control display mounting hole, and the operation control buttons are embedded in the control button mounting holes. An emergency stop button mounting hole is located at the lower part of the operation control panel, and the operation control emergency stop button is embedded in the emergency stop button mounting hole. The operation control circuit board is electrically connected to the operation control display screen, the thermostatic programmable control display, the operation control buttons, and the operation control emergency stop button. The thermostatic programmable control display is electrically connected to the cooling component, the heat dissipation component, and the power supply component. The operation control display screen is electrically connected to the cooling component, the heat dissipation component, and the power supply component.

[0015] As a further step, a method for using a dual-temperature zone test chamber to predict battery cycle life failure includes the following: S1: Select a group of batteries, then charge the batteries and store them at high temperature; S2: Place the stored battery on the test fixture, and then set the constant temperature and battery capacity on the constant temperature programmable control display. During the charge and discharge test, the test will stop when the battery capacity decays to the target SOH, and the test results will be displayed on the operation control display screen. S3: Analyze the test results of the batteries, remove the batteries from the test chamber, disassemble these batteries to determine the battery cycle failure problem points.

[0016] As a further step, the device is charged to 45% SOC and then stored at high temperature. The high-temperature storage conditions are as follows: storage temperature T, 60℃ ≥ T ≥ 30℃, storage time M, 25 days ≥ M ≥ 1 day; preferably T is 50℃ and M is 25 days; the charge / discharge voltage range is 1.5V to 3.65V.

[0017] As a further step, the target SOH is 75% SOH.

[0018] As a further step, the method for determining battery cycle failure is to observe and record the state of the positive and negative electrode materials of the battery, whether there is gas generation inside the battery, to fabricate a button cell from the disassembled electrode sheets, and to further determine the changes that occur in the battery during the test through physicochemical analysis.

[0019] The beneficial effects of this invention are as follows: the equipment is simple to operate, equipped with a touch screen and an automatic control system, making it convenient to use. It can quickly switch between high and low temperatures, greatly shortening the testing cycle and improving work efficiency. Through high-precision temperature sensors and controllers, the environmental test chamber can ensure accurate temperature control. The equipment can also store multiple sets of test programs, facilitating repeated testing and improving testing efficiency. It eliminates the need for lengthy cyclic testing, saving time and costs. This invention can pinpoint specific battery cycle failure points, allowing for optimization of battery design based on specific issues, compared to predicting cycle life, thus significantly shortening the R&D cycle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the dual-temperature zone test chamber structure for predicting battery cycle life failure according to the present invention; Figure 2 This is a schematic diagram of the explosion structure of the dual-temperature zone test chamber for predicting battery cycle life failure according to the present invention. Figure 3 This is a schematic diagram of the test inner box assembly structure of the present invention; Figure 4 This is a schematic diagram of the exploded structure of the inner casing component tested in this invention; Figure 5 This is a schematic diagram of the test inner box structure of the present invention; Figure 6 This is a schematic diagram of the exploded structure of the inner box used in the present invention. Figure 7 This is a schematic diagram of the structure of the test inner box clamp component of the present invention; Figure 8 This is a schematic diagram of the exploded structure of the test inner box clamp component of the present invention; Figure 9 This is a schematic diagram of the test chamber assembly structure of the present invention; Figure 10 This is a schematic diagram of the exploded structure of the test chamber assembly of the present invention; Figure 11 This is a schematic diagram of the component structure of the control panel of the present invention; Figure 12 This is a schematic diagram of the component structure of the control panel of the present invention; Reference numerals: 1. Test chamber assembly; 101. Frame assembly; 1010. Test inner chamber mounting position; 102. Refrigeration assembly; 103. Heat dissipation assembly; 104. Power supply assembly; 105. Inner side panel; 106. External air duct assembly; 107. Middle partition; 2. Explosion-proof door assembly; 3. Test inner chamber assembly; 301. Test inner chamber; 3010. Left side panel of inner chamber; 3011. Bottom panel of inner chamber; 3012. Top panel of inner chamber; 3013. 3014. Inner box right side panel; 3015. Inner box test hole mounting bracket; 3016. Inner box rear side fixing bracket; 3017. Inner box wind baffle; 302. Test inner box clamp component; 3020. Left side bracket; 3021. Left side slide rail mounting plate; 3022. Left side slide rail; 3023. Right side bracket; 3024. Right side slide rail mounting plate; 3025. Right side slide rail; 3026. Cable routing fixing component; 3027. Test 3028. Fixture mounting plate; 3029. Test fixture shelf; 3030. Test fixture guide rail; 303. Left side sealing plate of the inner test chamber; 304. Side air guide plate of the inner test chamber; 305. Test hole of the inner chamber; 306. Baffle of the inner test chamber; 307. Rolled impeller assembly; 308. Tilt-type heating tube mounting bracket; 309. Tilt-type heating tube; 310. Evaporator; 311. Right side sealing plate of the inner test chamber; 312. Inner test chamber 4. Rear sealing plate; 5. Dual-temperature zone door assembly; 6. Electrical components; 7. Operation control panel assembly; 8. Operation control panel; 9. Display mounting hole; 10. Constant temperature programmable control display mounting hole; 11. Control button mounting hole; 12. Emergency stop button mounting hole; 13. Operation control circuit board; 14. Operation control display screen; 15. Constant temperature programmable control display; 16. Operation control button; 17. Operation control emergency stop button. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] For reference Figures 1-12 As shown, a dual-temperature zone test chamber for predicting battery cycle life failure includes a test chamber assembly 1, an explosion-proof door assembly 2, a test inner chamber assembly 3, a dual-temperature zone door assembly 4, an electrical assembly 5, and an operation control panel assembly 6. The test inner chamber assembly 3 is located inside the front end of the test chamber assembly 1, and the dual-temperature zone door assembly 4 is located on the outer side wall of the test chamber assembly 1. The dual-temperature zone door assembly 4 seamlessly connects and fastens the test inner chamber assembly 3 to the test chamber assembly 1. The electrical assembly 5 is located on the inner side wall of one side of the test chamber assembly 1, and the operation control panel assembly 6 is located on the right side of the front end of the test chamber assembly 1. The operation control panel assembly 6 is electrically connected to the test inner chamber assembly 3, and the electrical assembly 5 is electrically connected to the operation control panel assembly 6.

[0024] Preferably, the test chamber assembly 3 includes a test chamber 301, a test chamber clamping component 302, a test chamber left side sealing plate 303, a test chamber side air guide plate 304, a test chamber test hole 305, a test chamber baffle 306, a rolled-edge impeller component 307, a finned heating tube mounting bracket 308, a finned heating tube 309, an evaporator 310, a test chamber right side sealing plate 311, and a test chamber rear sealing plate 312. The test chamber 301 has a clamping cavity inside, and the test chamber clamping component 302 is embedded in the clamping cavity inside the test chamber 301. The test chamber left side sealing plate 303 is provided on the inner left side wall inside the test chamber 301, and the test chamber side air guide plate 304 is installed on the test chamber. On the inner wall of the left side sealing plate 303 of the inner box, there are several inner box test holes 305 at the rear end of the test inner box 301. The rear end of the test inner box 301 is provided with a test inner box rear sealing plate 312. A test inner box baffle 306 is provided on one side of the test inner box rear sealing plate 312. A rolled edge impeller component 307 is provided on the right side of the inner box test hole 305. A finned heating tube mounting bracket 309 is provided on the left side of the rolled edge impeller component 307. A finned heating tube 309 is provided on the finned heating tube mounting bracket 309. A test inner box right side sealing plate 311 is provided on the inner wall of the right side of the test inner box 301. An evaporator 310 is provided on the inner wall of the test inner box right side sealing plate 311. The evaporator 310 is electrically connected to the electrical component 5.

[0025] Preferably, the test chamber 301 includes a left side panel 3010, a bottom panel 3011, a top panel 3012, a right side panel 3013, a test hole mounting component 3014, a rear fixing component 3015, a rear side panel 3016, and a windbreak panel 3017. The bottom panel 3011 has a left side panel 3010 and a right side panel 3013 on both sides, and a top panel 3012 is located between the left side panel 3010 and the right side panel 3013. An inner rear side panel 3016 is provided at the rear between the left side panel 3010 and the right side panel 3013 of the inner box. An inner rear side fixing member 3015 is provided on the left inner side wall of the inner box rear side panel 3016. An inner box test hole mounting member 3014 is provided on one side of the inner box rear side fixing member 3015. An inner box test hole 305 is provided on the inner box test hole mounting member 3014. An inner box wind baffle 3017 is provided on the right inner side wall of the inner box rear side panel 3016. A rolled impeller component 307 is provided on the inner box wind baffle 3017.

[0026] Preferably, the test inner box fixture component 302 includes a left side bracket 3020, a left side slide rail mounting plate 3021, a left side slide rail 3022, a right side bracket 3023, a right side slide rail mounting plate 3024, a right side slide rail 3025, a cable routing fastener 3026, a test fixture mounting plate 3027, and a test fixture 3028. The left side bracket 3020 is mounted on the left side plate 3010 of the inner box, and the left side bracket 3020 is provided with the left side slide rail mounting plate 3021. The left side slide rail mounting plate 3021 is provided with the left side slide rail 3022. The right side bracket 3023 is mounted on the right side plate 3013 of the inner box, and the right side bracket 3023 is provided with the right side slide rail mounting plate 3024. The right slide rail mounting plate 3024 is provided with a right slide rail 3025. A test fixture mounting plate 3027 is provided between the left slide rail mounting plate 3021 and the right slide rail mounting plate 3024. The test fixture mounting plate 3027 is provided with a test fixture shelf 3029. The test fixture shelf 3029 is provided with several sets of test fixture guide rails 3030. Several test fixtures 3028 are provided on the test fixture guide rails 3030. The rear end of the test fixture mounting plate 3027 is provided with a wiring fixing component 3026. The wiring fixing component 3026 is fixed to the lower part of the rear side plate 3016 of the inner box. The test fixtures 3028 are electrically connected to the operation control panel assembly 6 through a four-wire wire.

[0027] Preferably, the test chamber assembly 1 includes a frame assembly 101, a cooling assembly 102, a heat dissipation assembly 103, a power supply assembly 104, an inner side panel 105, an external air duct assembly 106, and a middle partition 107. The front end of the frame assembly 101 has a test inner chamber mounting position 1010. A left side slide rail mounting plate 3021 and a right side slide rail mounting plate 3024 are respectively installed in the test inner chamber mounting position 1010 at the front end of the frame assembly 101. The rear end of the frame assembly 101 has a power supply mounting position, and the power supply assembly 104 is installed in the power supply mounting position at the rear end of the frame assembly 101. A cooling assembly 102 is located on the left side of the power supply assembly 104. The cooling assembly 102 and the... A middle partition 107 is provided between the power supply components 104. An inner side plate 105 is provided between the cooling component 102 and the front end of the power supply component 104. An external air duct component 106 is provided on the right side of the top rear end of the frame component 101. A heat dissipation component 103 is provided at the rear end of the power supply component 104. The cooling component 102, heat dissipation component 13, power supply component 104, and external air duct component 106 are electrically connected to the electrical component 5. The power supply component 104 is electrically connected to the cooling component 102, heat dissipation component 103, and external air duct component 106. The power supply component 104 is electrically connected to the operation control panel component 6. The test fixture 3028 is electrically connected to the power supply component 104.

[0028] Preferably, the operation control panel assembly 6 includes an operation control panel 61, an operation control circuit board 62, an operation control display screen 63, a thermostatic programmable control display 64, operation control buttons 65, and an operation control emergency stop button 66. The operation control panel 61 has a display mounting hole 610 at its upper part, and the operation control display screen 63 is embedded in the display mounting hole 610. The operation control circuit board 62 is located inside the operation control panel 61. A thermostatic programmable control display mounting hole 611 is located to the lower left of the display mounting hole 610, and the thermostatic programmable control display 64 is embedded in the thermostatic programmable control display mounting hole 611. Below the thermostatic programmable control display mounting hole 611... The system has several control button mounting holes 612, and the operation control button 65 is embedded in the control button mounting holes 612. The lower part of the operation control panel 61 has a control emergency stop button mounting hole 613, and the operation control emergency stop button 66 is embedded in the control emergency stop button mounting hole 613. The operation control circuit board 62 is electrically connected to the operation control display screen 63, the constant temperature programmable control display screen 64, the operation control button 65, and the operation control emergency stop button 66. The constant temperature programmable control display screen 64 is electrically connected to the cooling component 102, the heat dissipation component 103, and the power supply component 104. The operation control display screen 63 is electrically connected to the cooling component 102, the heat dissipation component 103, and the power supply component 104.

[0029] Preferably, a method for using a dual-temperature zone test chamber for predicting battery cycle life failure includes the following: S1: Select a group of batteries, then charge the batteries and store them at high temperature; S2: Place the stored battery on the test fixture, and then set the constant temperature and battery capacity on the constant temperature programmable control display. During the charge and discharge test, the test will stop when the battery capacity decays to the target SOH, and the test results will be displayed on the operation control display screen. S3: Analyze the test results of the batteries, remove the batteries from the test chamber, disassemble these batteries to determine the battery cycle failure problem points.

[0030] Preferably, the storage is performed after charging to 45% SOC. The high-temperature storage conditions are: storage temperature T, 60℃≥T≥30℃, storage time M, 25 days≥M≥1 day; preferably, T is 50℃ and M is 25 days; the charge / discharge voltage range is 1.5V to 3.65V.

[0031] Preferably, the target SOH is 75% SOH.

[0032] Preferably, the method for determining battery cycle failure is to observe and record the state of the positive and negative electrode materials of the battery, whether there is gas generation inside the battery, to fabricate a button cell from the disassembled electrode sheets, and to further determine the changes that occur in the battery during the test through physicochemical analysis.

[0033] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A dual-temperature zone test chamber for predicting battery cycle life failure, characterized in that: The system includes a test chamber assembly, an explosion-proof door assembly, a test inner chamber assembly, a dual-temperature zone door assembly, an electrical assembly, and an operation control panel assembly. The test inner chamber assembly is located inside the front end of the test chamber assembly. The dual-temperature zone door assembly is located on the outer side wall of the test chamber assembly, and the dual-temperature zone door assembly seamlessly connects and fastens the test inner chamber assembly to the test chamber assembly. The electrical assembly is located on the inner side wall of one side of the test chamber assembly. The operation control panel assembly is located on the right side of the front end of the test chamber assembly. The operation control panel assembly is electrically connected to the test inner chamber assembly, and the electrical assembly is electrically connected to the operation control panel assembly.

2. The dual-temperature zone test chamber for predicting battery cycle life failure according to claim 1, characterized in that: The test chamber assembly includes a test chamber, a test chamber clamping component, a left side sealing plate of the test chamber, a side air guide plate of the test chamber, a test hole in the test chamber, a baffle plate of the test chamber, a rolled-edge impeller component, a finned heating tube mounting bracket, a finned heating tube, an evaporator, a right side sealing plate of the test chamber, and a rear sealing plate of the test chamber. The test chamber has a clamping cavity inside, and the test chamber clamping component is embedded in the clamping cavity inside the test chamber. A left side sealing plate of the test chamber is located on the inner left side wall of the test chamber, and the side air guide plate of the test chamber is installed on the left side of the test chamber. On the inner wall of the side sealing plate, the rear end of the test chamber is provided with several inner chamber test holes. The rear end of the test chamber is provided with a test chamber rear sealing plate. A test chamber baffle is provided on one side of the test chamber rear sealing plate. A rolled-edge impeller component is provided on the right side of the inner chamber test holes. A finned heating tube mounting bracket is provided on the left side of the rolled-edge impeller component. A finned heating tube is mounted on the finned heating tube mounting bracket. A test chamber right side sealing plate is provided on the inner right side wall of the test chamber. An evaporator is provided on the inner side wall of the test chamber right side sealing plate. The evaporator is electrically connected to the electrical components.

3. The dual-temperature zone test chamber for predicting battery cycle life failure according to claim 2, characterized in that: The test chamber includes a left side panel, a bottom panel, a top panel, a right side panel, a test hole mounting component, a rear fixing component, a rear panel, and a windbreak. The bottom panel has a left side panel and a right side panel on each side. A top panel is located between the left and right side panels. A rear panel is located between the left and right side panels. A rear fixing component is located on the left inner wall of the rear panel. A test hole mounting component is located on one side of the rear fixing component, and a test hole is located on the mounting component. A windbreak is located on the right inner wall of the rear panel, and a rolled-edge impeller is located on the windbreak.

4. The dual-temperature zone test chamber for predicting battery cycle life failure according to claim 3, characterized in that: The test chamber fixture component includes a left bracket, a left slide rail mounting plate, a left slide rail, a right bracket, a right slide rail mounting plate, a right slide rail, a wiring fastener, a test fixture mounting plate, and test fixtures. The left bracket is mounted on the left side panel of the inner chamber, and the left bracket has a left slide rail mounting plate. The left slide rail mounting plate has a left slide rail. The right bracket is mounted on the right side panel of the inner chamber, and the right bracket has a right slide rail mounting plate. The right slide rail mounting plate has a right slide rail. A test fixture mounting plate is located between the left and right slide rail mounting plates. The test fixture mounting plate has a test fixture shelf, and the test fixture shelf has several sets of test fixture guide rails. Several test fixtures are mounted on the test fixture guide rails. A wiring fastener is located at the rear end of the test fixture mounting plate and is fixed to the lower part of the rear side panel of the inner chamber. The test fixtures are electrically connected to the operation control panel component via a four-wire conductor.

5. The dual-temperature zone test chamber for predicting battery cycle life failure according to claim 4, characterized in that: The test chamber assembly includes a frame assembly, a cooling assembly, a heat dissipation assembly, a power supply assembly, an inner side panel, an external air duct assembly, and a middle partition. The front end of the frame assembly has a test chamber mounting position, and left and right slide rail mounting plates are respectively installed in the test chamber mounting positions at the front end of the frame assembly. The rear end of the frame assembly has a power supply mounting position, and the power supply assembly is installed in the power supply mounting position at the rear end of the frame assembly. A cooling assembly is located to the left of the power supply assembly, and a middle partition is provided between the cooling assembly and the power supply assembly. An inner side panel is provided between the cooling assembly and the front end of the power supply assembly. An external air duct assembly is located on the right side of the top rear end of the frame assembly. A heat dissipation assembly is located at the rear end of the power supply assembly. The cooling assembly, heat dissipation assembly, power supply assembly, and external air duct assembly are electrically connected to the electrical components. The power supply assembly is electrically connected to the cooling assembly, heat dissipation assembly, and external air duct assembly. The power supply assembly is electrically connected to the operation control panel assembly. The test fixture is electrically connected to the power supply assembly.

6. The dual-temperature zone test chamber for predicting battery cycle life failure according to claim 5, characterized in that: The operation control panel assembly includes an operation control panel, an operation control circuit board, an operation control display screen, a thermostatic programmable control display, operation control buttons, and an operation control emergency stop button. The operation control panel has a display mounting hole at its upper part, and the operation control display screen is embedded in the display mounting hole. The operation control circuit board is located inside the operation control panel. A thermostatic programmable control display mounting hole is located to the lower left of the display mounting hole, and the thermostatic programmable control display is embedded in the thermostatic programmable control display mounting hole. Several control button mounting holes are located below the thermostatic programmable control display mounting hole, and the operation control buttons are embedded in the control button mounting holes. An emergency stop button mounting hole is located at the lower part of the operation control panel, and the operation control emergency stop button is embedded in the emergency stop button mounting hole. The operation control circuit board is electrically connected to the operation control display screen, the thermostatic programmable control display, the operation control buttons, and the operation control emergency stop button. The thermostatic programmable control display is electrically connected to the cooling component, the heat dissipation component, and the power supply component. The operation control display screen is electrically connected to the cooling component, the heat dissipation component, and the power supply component.

7. A method for using a dual-temperature zone test chamber for predicting battery cycle life failure, characterized in that, Including the following: S1: Select a group of batteries, then charge the batteries and store them at high temperature; S2: Place the stored battery on the test fixture, and then set the constant temperature and battery capacity on the constant temperature programmable control display. During the charge and discharge test, the test will stop when the battery capacity decays to the target SOH, and the test results will be displayed on the operation control display screen. S3: Analyze the test results of the batteries, remove the batteries from the test chamber, disassemble these batteries to determine the battery cycle failure problem points.

8. The method of using the dual-temperature zone test chamber for predicting battery cycle life failure according to claim 7, characterized in that: The device is charged to 45% SOC and then stored at high temperature. The high-temperature storage conditions are as follows: storage temperature T, 60℃≥T≥30℃, storage time M, 25 days≥M≥1 day; preferably T is 50℃ and M is 25 days; the charge and discharge voltage range is 1.5V to 3.65V.

9. The method of using the dual-temperature zone test chamber for predicting battery cycle life failure according to claim 7, characterized in that: The target SOH is 75% SOH.

10. The method of using the dual-temperature zone test chamber for predicting battery cycle life failure according to claim 7, characterized in that: The methods for determining battery cycle failure include observing and recording the state of the positive and negative electrode materials, whether there is gas generation inside the battery, fabricating a button cell from the disassembled electrode sheets, and conducting physicochemical analysis to further determine the changes that occurred in the battery during the test.

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