Split type explosion-proof test box for battery test

Abstract

The utility model discloses a split type explosion-proof test box for battery testing, which relates to the technical field of battery testing, and comprises a box body, a detection instrument and a pressure relief mechanism, and an opening is arranged on the side surface of the box body; an opening is formed in the box body, the bottom plate trolley enters and exits the box body through the opening, a bottom plate used for bearing a battery is arranged on the bottom plate trolley, a moving mechanism is arranged below the bottom plate, a protective cover is movably connected to the upper face of the bottom plate, and a pull rod is connected to the protective cover. The device is good in compatibility, can adapt to batteries of different sizes, meets the requirements of data recording and phenomenon observation in the testing process, keeps the state of residues after testing to be complete, keeps the testing detail to be complete, and is safe and reliable in subsequent disassembly, analysis and transfer.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a split-type explosion-proof test box for battery testing. Background Art

[0002] With the development of the new energy vehicle industry, pure electric vehicles are increasingly gaining user acceptance. At the same time, extensive testing is required on the R&D side to verify and accumulate relevant experience in order to lay a solid foundation for the development of the new energy vehicle industry. This process requires some auxiliary equipment, such as explosion-proof chambers. An explosion-proof test chamber for battery testing is a device specifically designed to test batteries, especially lithium-ion batteries, under extreme conditions. This type of chamber provides a safe and controllable environment in the event of overcharging, over-discharging, short-circuiting, extrusion, puncture, thermal abuse, or other conditions that may cause a sharp increase in internal pressure in the battery and potentially cause a fire or explosion. Battery explosion-proof test chambers play a vital role in battery R&D, production, and quality control, ensuring the safety performance of battery products under various extreme conditions, thereby protecting user safety and reducing potential risks.

[0003] For example, the patent with announcement number CN210323094U discloses an explosion-proof protection device for lithium battery testing. The main body of the device is a box with a detachable top. The side walls of the box are provided with through holes for pressure relief. The bottom of the box is provided with a battery positioning portion for placing batteries. The box has an insulating layer fixedly laid on the inner wall of the box. Mainly to prevent hazards to personnel in the open environment of battery testing, the side walls of the box are opened for heat dissipation, and sample holes are reserved at the bottom to fix samples. For large-capacity battery module products, the box's explosion-proof protection is not high. After the holes are opened, oxygen supplementation may occur during the test, affecting the battery test results. There is no complete record of the phenomena during the test, and it is unsafe to transport the samples after testing.

[0004] For example, patent publication number CN217879555U discloses an over-discharge test device, including a main body, a wiring harness, a battery test system, an explosion-proof box, a test table, and a test cavity. The test table is detachably connected to the interior of the explosion-proof box, and the test cavity is disposed on the test table. The test cavity is provided with a pressure relief hole. The battery main body and the battery test system are disposed inside and outside the test cavity, respectively. The battery main body is connected to the battery test system via a wiring harness extending through the test cavity. The test table is detachably connected relative to the explosion-proof box, and the test table and test cavity can be removed from the explosion-proof box after an explosion occurs. Using a test table and box combination, the device performs an over-discharge test without a design for collecting other data for battery testing. After the test, removing the table from the bottom of the incubator facilitates the removal of explosion residues, but the removal process affects the state of the residues.

[0005] For example, the patent with announcement number CN218630116U discloses an explosion-proof box for battery testing. This explosion-proof box for battery testing includes a box body with an opening, a cover plate, and an exhaust pipe. The battery to be tested can be placed in the box body through the opening. The box body is provided with a cooling device for cooling the battery to be tested and a collection device capable of collecting and transmitting the status information of the battery to be tested. The side wall of the box body is provided with a mounting hole, and an explosion-proof valve is detachably mounted on the mounting hole. The cover plate is detachably connected to the box body and is used to seal the opening. The top opening design and the box body structure are insufficient for explosion-proof protection of high-capacity battery modules and above. The fixed and open top setting makes it inconvenient to disassemble before and after testing. The monitoring of process phenomena during the test is not recorded.

[0006] In summary, at present, most explosion-proof test chambers used for battery testing are integrated boxes with explosion-proof pressure relief devices. The commonly used method for testing battery performance is to place the samples in a standard explosion-proof test chamber for testing. The test setup, wiring harness connection, and sampling line connection are inconvenient, and the observation and analysis of sample residues after the test pose safety risks. Utility Model Content

[0007] Technical problems to be solved by utility models

[0008] In response to the technical problems that existing explosion-proof test chambers used for battery testing are not compatible with batteries of different sizes and have single functions, the utility model provides a split explosion-proof test chamber for battery testing. It has good compatibility and can adapt to batteries of different sizes. It can achieve the requirements of data recording and phenomenon observation during the test process. The state of the residue after the test remains intact, the test details are fully preserved, and the subsequent disassembly, analysis and transportation are safe and reliable.

[0009] Technical Solution

[0010] In order to solve the above problems, the technical solution provided by the present invention is as follows:

[0011] A split explosion-proof test box for battery testing includes a box body, a detection instrument and a pressure relief mechanism. The side of the box body is provided with an opening; a bottom plate trolley enters and exits the box body through the opening; the bottom plate trolley is provided with a bottom plate for carrying batteries, a moving mechanism is provided under the bottom plate, and a protective cover is movably connected to the top of the bottom plate, and the protective cover is connected to a pull rod.

[0012] Split Design: The design of the box and the bottom trolley are separated, so the bottom trolley can load and unload batteries outside the box and then enter the box through the opening for testing. This not only improves the safety of operation, but also increases the efficiency of the experiment.

[0013] Bottom plate trolley and moving mechanism: The moving mechanism (such as wheels) on the bottom plate trolley allows easy movement in and out of the box without the need for manual handling of heavy batteries, reducing the labor intensity and risk of operators.

[0014] Protective cover and lever: The protective cover protects the battery from external interference while maintaining a good viewing angle during testing. The lever design allows the operator to remotely control the opening and closing of the protective cover, further enhancing operational safety.

[0015] Compatibility: Since the base plate on the base plate trolley is large and can cover batteries of different sizes, the test chamber can adapt to a variety of battery specifications, improving the versatility and scope of use of the equipment.

[0016] Data recording and observation: The detection instruments integrated in the box can record various parameters of the battery during the test, such as voltage, current, temperature, etc. At the same time, through the transparent protective cover or observation window, the operator can intuitively observe the battery's response during the test, which helps to analyze the battery performance more deeply.

[0017] Safe handling after testing: After the test, the bottom plate trolley can safely move the battery with residue out of the box, facilitating subsequent disassembly analysis and waste disposal, reducing the risk of operators directly contacting hazardous substances.

[0018] Overall safety: The pressure relief mechanism of the box plays a key role in the test. It can effectively control the pressure inside the box, prevent the harm caused by explosion, and protect the safety of laboratory personnel and equipment.

[0019] Optionally, the protective cover is provided with at least three sides, and the side where the pull rod is located is provided with a protective cover.

[0020] The protective cover is designed to have at least three sides, meaning it's box-like in shape but may have one open side. This provides comprehensive protection, mitigating the risk of flying debris from accidental collisions or chemical reactions during battery testing, thereby protecting both operators and equipment. The side where the pull rod resides is also covered, indicating that the pull rod is located on one side of the cover or integrated with one side, allowing for easy opening and closing of the cover. This ensures that even when the pull rod is pulled, the operator is not directly exposed to potential hazards. When closed, the cover forms an enclosed space, completely surrounding the battery, leaving only necessary viewing windows or sensor ports. The operator can control the sliding of the cover using the pull rod, allowing for loading, testing, and unloading of batteries without direct contact. This contactless operation significantly improves testing safety, particularly when handling high-energy-density batteries, which could experience thermal runaway, explosion, or other hazardous events during testing.

[0021] Optionally, a buckle is provided at the bottom of the protective cover, and a slot is provided at the edge of the base trolley, and the slot cooperates with the buckle.

[0022] Quick Installation and Removal: The combined buckle and slot design allows for quick installation and removal of the protective cover. Operators simply align the buckle on the bottom of the cover with the slot on the edge of the base carriage and secure it with a simple push, or vice versa. This design simplifies the operation process and improves work efficiency.

[0023] Stable Fixation: During battery testing, batteries may react violently or even explode due to overcharging, over-discharging, thermal runaway, and other factors. The combination of clips and slots ensures the protective cover is stably fixed to the base trolley, maintaining its integrity even in emergencies and providing additional safety for operators. It also provides both fixing and positioning functions, allowing for easier movement of the base trolley.

[0024] Precise alignment: The combination of snaps and slots also helps to accurately align the protective cover, ensuring that the position is consistent every time it is installed. This is especially important for tests that require a high degree of precision. It also helps the protective cover align correctly with other components (such as sensors, cable interfaces, etc.).

[0025] Optionally, a slot structure is provided at the connection between the box body and the bottom plate trolley.

[0026] Positioning and fixation: The slot structure can help the bottom plate trolley to be accurately positioned in the box. When the bottom plate trolley is pushed into the box, its edge will match the slot structure inside the box, ensuring that the bottom plate trolley stays stably in the predetermined position and will not move at will. This is especially important during the test process, because any slight movement may affect the accuracy of the test results.

[0027] Safety lock: The slot structure can be used as part of the safety locking mechanism. Once the base trolley is correctly positioned, the slot structure will lock the base trolley to prevent accidental movement of the trolley due to vibration or battery reaction during the test, thereby ensuring the safety of the operator and the smooth progress of the test.

[0028] Easy to operate: The slot structure design makes the bottom trolley's entry and exit smoother and faster. The operator only needs to push or pull the trolley along the track, and the slot will automatically guide the trolley into place, reducing the time for alignment and adjustment and improving work efficiency.

[0029] Optionally, the pressure relief mechanism includes a pressure relief plate body, a pressure relief plate connector, a pressure relief connecting pin, a pressure relief chamber, a pressure relief ball and a pressure relief spring. The pressure relief plate body is rotatably connected to the upper edge of the pressure relief window on the side of the box body through the pressure relief plate connector and the pressure relief connecting pin. A pair of the pressure relief chamber, the pressure relief ball and the pressure relief spring are combined to form a clamping member. The pressure relief ball slides in the pressure relief chamber. The lower edge of the pressure relief plate body is provided with a protrusion that cooperates with the clamping member.

[0030] Pressure relief plate body: The pressure relief plate body is usually installed on the pressure relief window on the side of the box. It forms a rotational connection with the box through the pressure relief plate connector and the pressure relief connecting pin. In this way, when the internal pressure increases, the pressure relief plate body can flip outward to open the pressure relief channel.

[0031] Pressure relief plate connector and pressure relief connecting pin: The function of these parts is to connect the pressure relief plate to the pressure relief window on the side of the box, while allowing the pressure relief plate to rotate freely within a certain angle to facilitate pressure release.

[0032] Pressure relief chamber: The pressure relief chamber is an internal space that contains a pressure relief ball and a pressure relief spring, which form a channel for pressure release. When the pressure in the box is normal, the pressure relief ball, under the action of the pressure relief spring, clamps the protrusion and the pressure relief plate body.

[0033] Pressure relief ball: The pressure relief ball is located in the pressure relief chamber and is connected to the pressure relief spring. When the pressure inside the box rises, the pressure overcomes the force of the pressure relief spring and pushes the pressure relief ball to move.

[0034] Pressure relief spring: One end of the pressure relief spring is connected to the opening of the pressure relief chamber, and the other end is connected to the pressure relief ball. It provides a certain preload, allowing the pressure relief ball to tightly clamp the protrusion under normal circumstances. When the internal pressure rises to a certain level, the pressure relief spring is compressed, allowing the pressure relief ball to move, and the pressure relief plate body is loosened and flipped outward.

[0035] Optionally, the opening is connected to a box door, the box door is provided with an observation window, and the box door is closed by bolts.

[0036] The observation window is typically made of special, high-temperature and impact-resistant materials, such as tempered glass or polycarbonate. It allows operators to safely observe the chamber during testing without having to open the door, reducing operational risks. The presence of the observation window is crucial for monitoring the battery's test status, assessing test progress, and taking emergency measures when necessary.

[0037] Using bolts to close the chamber door is a reliable method for ensuring a tight fit and a good seal between the door and the chamber. Bolt-on closing mechanisms often require the operator to manually tighten multiple bolts to ensure a complete seal. The advantage of this design is that it provides sufficient force to withstand the high pressures that may occur within the chamber while also allowing the door to be easily opened for sample changes when necessary.

[0038] Optionally, the pull rod is movably connected to the base trolley.

[0039] Operational convenience: The movable lever allows the operator to easily move the trolley without directly contacting it. This design usually allows the lever to rotate or retract within a certain range to accommodate different operating postures and space constraints, improving operator comfort and efficiency.

[0040] Safe Distance: The flexible connection between the pull rod and the base trolley ensures that the operator maintains a safe distance from the test chamber and the batteries inside. This is particularly important when handling high-energy-density batteries, as it reduces the operator's direct exposure to potential explosion risks.

[0041] Optionally, the pull rod includes a pull rod connector, a cross coupling and a pull rod body, and the pull rod body is connected to the protective cover through the pull rod connector and the cross coupling.

[0042] The tie rod connector is designed with fastening screws or clips to facilitate installation and disassembly. The tie rod connector must ensure a reliable connection between the tie rod and the protective cover, while allowing a certain degree of relative movement between the two to adapt to different operational requirements. A cross coupling is a mechanical connector used to connect two axes that are not in the same straight line or have an angular deviation. In the tie rod system, the function of the cross coupling is to compensate for the possible angular deviation between the tie rod body and the protective cover, ensuring that the pulling force can be smoothly transmitted to the protective cover, while allowing the tie rod to have a certain degree of swing during operation, thereby improving the flexibility and comfort of operation. The length and diameter of the tie rod body need to be designed according to actual usage requirements to ensure that the operator can effectively control the movement of the protective cover from a safe distance.

[0043] Optionally, a moving mechanism is provided at the bottom of the box.

[0044] The mobile mechanism set at the bottom of the box is to improve the flexibility and portability of the equipment, making it easier to move and position in a laboratory or factory environment, and can be flexibly moved to meet different test conditions and site conversions.

[0045] Beneficial effects

[0046] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0047] The technical solution provided by the present invention sets up a split structure, a box body and a bottom plate trolley, and the side of the box body is provided with an opening; the bottom plate trolley enters and exits the box body through the opening, and the bottom plate trolley is provided with a bottom plate for carrying batteries, and a moving mechanism is provided under the bottom plate. A protective cover is movably connected to the top of the bottom plate, and the protective cover is connected to a pull rod. The design of separating the box body and the bottom plate trolley allows the bottom plate trolley to load and unload batteries outside the box body, and then enter the box body through the opening for testing. This not only improves the safety of the operation, but also increases the efficiency of the experiment. After the test, the bottom plate trolley can be pulled out of the box body, and the state of the battery residue remains intact, making the subsequent disassembly, analysis and transportation more efficient, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the explosion structure of a split explosion-proof test chamber for battery testing proposed in an embodiment of the present utility model;

[0049] Figure 2 A schematic structural diagram of a floor trolley and a protective cover of a split explosion-proof test chamber for battery testing proposed in an embodiment of the present utility model;

[0050] Figure 3 A partial schematic diagram of the pull rod connection of a split explosion-proof test chamber for battery testing proposed in an embodiment of the present utility model;

[0051] Figure 4 A schematic diagram of a pressure relief panel of a split explosion-proof test chamber for battery testing proposed in an embodiment of the present utility model;

[0052] 1. Box body; 2. Bottom plate trolley; 3. Protective cover; 4. Wheel body; 5. Wheel connecting pin; 6. Wheel connecting piece; 7. Pull rod connecting piece; 8. Cross coupling; 9. Pull rod body; 10. Observation window; 11. Box door body; 12. Box door bushing; 13. Box door connecting pin; 14. Box door connecting bolt; 15. Box door connecting nut; 16. Fire sprinkler; 17. Camera; 18. Camera window glass; 19. Pressure relief plate body; 20. Pressure relief plate connecting piece; 21. Pressure relief connecting pin; 22. Pressure relief chamber; 23. Pressure relief ball; 24. Pressure relief spring; 25. Sealing plug; 26. Test battery. DETAILED DESCRIPTION

[0053] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0054] Example

[0055] Combined with attachment Figure 1 A split-type explosion-proof test chamber for battery testing, comprising a split chamber 1 and a floor trolley 2, covers safety testing of battery products from single cells and modules to packs. It facilitates transportation before and after battery safety testing, setup of test harnesses, preparation of sampling lines, and data recording during testing, meeting the needs of testing R&D and protecting the safety of testers. Chamber 1 includes testing instruments and a pressure relief mechanism, and has an opening on its side.

[0056] The bottom of the box 1 is provided with a moving mechanism. Wheels, connecting pins and connecting parts are installed at the bottom of the box 1. The box 1 can move freely. There are two universal wheels in the front and fixed wheels in the back, so that the box 1 can be flexibly moved to meet different test conditions and site conversions.

[0057] The opening is connected to the box door body 11, and the box door body 11 is provided with an observation window 10, and the box door body 11 is closed by bolts. A large-area observation window is designed on the box door body 11, which can ensure that the test personnel can observe the phenomena produced by the experiment visually or by setting a camera. At the same time, the box door body 11 provides a fixing function for the bottom plate trolley 2, placing the trolley to move. The box door shaft sleeve 12, the box door connecting pin 13, the box door connecting bolt 14, and the box door connecting nut 15 constitute an explosion-proof lock structure. The box door connecting bolt 14 is threadedly connected with the box door connecting nut 15 to prevent the box door from being bounced open due to the high internal explosion pressure during the experiment.

[0058] A slot structure is provided at the connection between the box body 1 and the bottom plate trolley 2. The bottom plate trolley 2 can freely enter the connection box body 1, ensuring the accuracy of direction, as well as positioning and fixing effects.

[0059] A fire extinguishing steel material shower is installed inside the box 1. If a battery fire occurs during the test, the test is judged to be failed and the fire can be extinguished by manually remotely switching on and off.

[0060] Combined with attachment Figure 2 A base trolley 2 enters and exits the box 1 through the opening. The base trolley 2 is provided with a base for carrying batteries, and a movable mechanism is provided beneath the base. A wheel body 4, a wheel connecting pin 5, and a wheel connector 6 are mounted beneath the base trolley 2. The wheel design is still characterized by two universal wheels in the front and fixed wheels in the rear, allowing the base trolley 2 to be flexibly moved, facilitating the forward and backward transport of test samples.

[0061] Testing Instrumentation: Cameras 17 are installed on the back and left and right sides of enclosure 1 to capture the experimental process and experimental phenomena in all directions. Glass windows are installed at the camera 17 mounting locations to prevent damage to the camera 17 in the event of fire or explosion during testing. Two threading holes are designed on the back of enclosure 1 to allow the sampling wiring harnesses for current, voltage, temperature, and other testing to enter and exit the explosion-proof enclosure. After connection is established, they are secured with sealing plugs 25 to ensure the seal and integrity of the test bench explosion-proof enclosure.

[0062] A protective cover 3 is movably connected to the upper surface of the base plate. The protective cover 3 has at least three sides, including the side where the pull rod is located. In this embodiment, the protective cover 3 is provided on three sides, with no protective cover 3 facing the housing 1. When the operator pulls out the base trolley 2, it is positioned on the side of the pull rod, facing the housing 1, where it is less likely to endanger the operator. The housing 1 provides a shield, making it safer. One side remains vacant for convenient loading and unloading of the test battery 26.

[0063] The bottom of the protective cover 3 is equipped with a snap, and the edge of the base cart 2 has a slot that mates with the snap. The left and right sides of the protective cover 3 are also equipped with slots. A 10cm slot is located at the bottom of the front section of the protective cover 3. Once the slot contacts the front of the cart, the protective cover 3 is connected to the cart.

[0064] Combined with attachment Figure 3 , the protective cover 3 is connected to a pull rod, and the pull rod is movably connected to the base trolley 2. The pull rod includes a pull rod connector 7, a cross coupling 8 and a pull rod body 9, and the pull rod body 9 is connected to the protective cover 3 through the pull rod connector 7 and the cross coupling 8. The base trolley 2 protective cover 3, the pull rod connector 7, the cross coupling 8 and the pull rod connector 7 are assembled into a new type of pull rod. Because it is equipped with a cross coupling 8, the pull rod connector 7 can rotate flexibly. The box body 1 and the base trolley 2 can be combined. They can realize their functions separately and be combined to realize the test explosion-proof box. The test battery 26 is placed on the base trolley 2, and the connection lines can be prepared in advance. A handle is added to the base trolley 2 to control the direction.

[0065] Combined with attachment Figure 4 The pressure relief mechanism includes a pressure relief plate body 19, a pressure relief plate connector 20, a pressure relief connecting pin 21, a pressure relief cavity 22, a pressure relief ball 23 and a pressure relief spring 24. The pressure relief plate body 19 is rotatably connected to the upper edge of the pressure relief window on the side of the box body 1 through the pressure relief plate connector 20 and the pressure relief connecting pin 21. A pair of the pressure relief cavity 22, the pressure relief ball 23 and the pressure relief spring 24 are combined to form a clamping member. The pressure relief ball 23 slides in the pressure relief cavity 22. The lower edge of the pressure relief plate body 19 is provided with a protrusion that cooperates with the clamping member.

[0066] As a preferred implementation example, the thermal diffusion experiment of the test module requires pre-test sample modification by adding a heating plate in the middle of the sample battery cell. The test process requires recording temperature data at multiple points on the module sample. To prepare for the test, the sample can be placed on the base cart 2 in advance, and various pre-test pre-treatments are performed. After completion, the sample is transferred to the explosion-proof box 1. After connection is complete, the wiring harness is routed through the threading holes on the back of the box 1 to connect to the sampler and heating equipment. The test chamber door is closed, and preparations are made for testing. Monitoring remains active during the test, accurately recording any smoke or fire during the test and the time of occurrence. If a sample catches fire, the inventory test is invalid, and a fire extinguishing water sprinkler is activated to suppress the fire. After the test, the sample wiring is disconnected and can be removed from the base cart 2 for subsequent sample disassembly and analysis. This facilitates the removal of uncontrolled battery residue while effectively ensuring the safety of personnel transporting the sample.

[0067] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A split explosion-proof test chamber for battery testing, characterized in that: include A box body, including a detection instrument and a pressure relief mechanism, wherein an opening is provided on the side of the box body, and the pressure relief mechanism includes a pressure relief plate body, a pressure relief plate connector, a pressure relief connecting pin, a pressure relief chamber, a pressure relief ball, and a pressure relief spring. The pressure relief plate body is rotatably connected to the upper edge of the pressure relief window on the side of the box body through the pressure relief plate connector and the pressure relief connecting pin. A pair of the pressure relief chambers, the pressure relief balls, and the pressure relief springs are combined to form a clamping member. The pressure relief balls slide in the pressure relief chambers. The lower edge of the pressure relief plate body is provided with a protrusion that cooperates with the clamping member. A bottom plate trolley enters and exits the box through the opening. The bottom plate trolley is provided with a bottom plate for carrying batteries. A moving mechanism is provided under the bottom plate. A protective cover is movably connected to the top of the bottom plate, and the protective cover is connected to a pull rod.

2. A split explosion-proof test chamber for battery testing according to claim 1, characterized in that: The protective cover is provided with at least three sides, and the side where the pull rod is located is provided with a protective cover.

3. A split explosion-proof test chamber for battery testing according to claim 2, characterized in that: A buckle is provided at the bottom of the protective cover, and a slot is provided at the edge of the bottom plate trolley, and the slot cooperates with the buckle.

4. The split explosion-proof test chamber for battery testing according to claim 1, characterized in that: A slot structure is provided at the connection between the box body and the bottom plate trolley.

5. The split explosion-proof test chamber for battery testing according to claim 1, characterized in that: The opening is connected to a box door, an observation window is provided on the box door, and the box door is closed by bolts.

6. The split explosion-proof test chamber for battery testing according to claim 1, characterized in that: The pull rod is movably connected to the bottom plate trolley.

7. A split explosion-proof test chamber for battery testing according to claim 6, characterized in that: The pull rod comprises a pull rod connector, a cross coupling and a pull rod body, and the pull rod body is connected to the protective cover through the pull rod connector and the cross coupling.

8. A split explosion-proof test chamber for battery testing according to any one of claims 1 to 7, characterized in that: A moving mechanism is provided at the bottom of the box.

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