High-low-temperature explosion-proof test box for high-safety battery

Abstract

The invention relates to the technical field of battery high-low temperature explosion-proof test boxes, in particular to a high-safety battery high-low temperature explosion-proof test box. The device comprises a machine body, a heating device and a cooling device are arranged in the machine body, a temperature sensor is arranged in the machine body and used for obtaining the real-time temperature in the machine body, a groove is formed in the lower portion of a workbench of the machine body, and an anti-explosion box is arranged in the groove. The steel wire ropes are pulled by the falling plate in the moving process, the steel wire ropes are pulled by external force to move in a manner of being attached to the surface of the fixed pulley, and the steel wire ropes on the two sides of the falling plate pull the left cover plate and the right cover plate to move relatively in the moving process; therefore, the opening of the explosion-proof box between the left cover plate and the right cover plate is quickly closed, and potential safety hazards are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of battery high and low temperature explosion-proof test boxes, in particular to a high-safety battery high and low temperature explosion-proof test box. Background Art

[0002] After lithium batteries are produced and before they reach consumers, battery safety testing is required to ensure the safety of the batteries. Whether lithium batteries can withstand high or low temperatures depends on the quality of the lithium batteries. The batteries are now tested in test chambers.

[0003] There are many existing technologies for experimental devices, such as:

[0004] Chinese patent publication number CN216560922U discloses a high and low temperature test chamber specially designed for lithium battery explosion-proof, which belongs to the field of battery test chambers, including an experimental chamber and a cavity. The test chamber is provided with multiple cavities, a pressure relief valve is provided on the top of the test chamber, and a temperature control mechanism is provided in the cavity. The temperature control mechanism is a refrigeration device and a heating device. The refrigeration device includes a refrigerator, a circulating fan, and a circulating air duct. The circulating air duct is installed on the test chamber, and both ends of the circulating air duct extend into the cavity respectively. A refrigerator is provided on the circulating air duct, and the refrigerator is installed outside the test chamber.

[0005] However, there are still some problems in actual use:

[0006] 1. During the use of the current experimental device, the heating system of the experimental device may have certain design defects. For example, the heating method used is relatively single and cannot achieve all-round and uniform heat transfer. It may rely only on local heating sources, resulting in serious uneven distribution of heat in different parts of the battery, or the layout of the heating elements is unreasonable, resulting in excessive heating in some areas and insufficient heat in other areas, resulting in inaccurate test results;

[0007] 2. Qualified batteries often have many problems such as internal short circuit, unstable electrode materials, damaged diaphragms, etc. Under certain conditions, such as high temperature environment, overcharging, over-discharging, etc., these defects will trigger violent chemical reactions, causing the internal pressure of the battery to rise sharply, and eventually lead to explosion, resulting in damage to the internal parts of the body.

[0008] In view of this, we propose a high-safety battery high and low temperature explosion-proof test chamber. Summary of the invention

[0009] The object of the present invention is to provide a high-safety battery high and low temperature explosion-proof test box to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the object of the present invention is to provide a high-safety battery high and low temperature explosion-proof test box, including a body, a heating device and a cooling device are arranged inside the body, a temperature sensor is arranged inside the body, the temperature sensor is used to obtain the real-time temperature inside the body, a groove is opened under the workbench of the body, an explosion-proof box is arranged in the groove, a cylinder is arranged on the top of the body, a base plate is arranged on the piston rod at the end of the cylinder, a test assembly is arranged under the base plate, the test assembly is used to place the battery to be tested, when the battery has an explosion tendency during the test, the test assembly is controlled to push the battery to fall into the explosion-proof box, slide grooves are arranged on both sides of the outer wall of the explosion-proof box, a sealing assembly is arranged on the surface of the explosion-proof box, the sealing assembly is used to automatically close the opening on the surface of the explosion-proof box when the battery falls into the explosion-proof box, so as to prevent the battery explosion from impacting the inside of the body, and a fixing assembly is arranged on the surface of the sealing assembly, and the fixing assembly is used to reinforce the sealing assembly.

[0011] As a further improvement of the technical solution, a carbon canister is provided on the top of the cylinder, carbon powder is placed inside the carbon canister, a spray head is provided at the bottom of the carbon canister, the opening and closing of the spray head is controlled by an electric valve, and the state of the battery to be tested is observed through an observation window provided on the surface of the body. When the battery catches fire and smokes, the spray head sprays carbon powder on the battery surface to extinguish the fire.

[0012] As a further improvement of the present technical solution, the test assembly includes a motor arranged on one side of the substrate, a screw is provided on the surface of the motor output shaft, the thread on the screw surface is symmetrical, and placement plates are provided on both sides of the screw surface. The rotation of the screw is controlled to make the placement plates move relatively, and a placement surface is formed between the placement plates.

[0013] As a further improvement of the technical solution, a column tube is provided on one side of the placement plate, a sliding rod is slidably provided on the inner wall of the column tube, and a compression spring is provided between the column tube and the sliding rod.

[0014] As a further improvement of the technical solution, a clamping plate is provided at the end of the slide rod, and a plurality of heat dissipation holes are opened on the surface of the clamping plate. The clamping plate is used to automatically limit and fix the battery placed between the placement plates to form a placement surface.

[0015] As a further improvement of the present technical solution, the sealing assembly includes a left cover plate and a right cover plate arranged on the surface of the explosion-proof box, a through groove is opened at the center of the left cover plate and the right cover plate, rollers are provided on both sides of the left cover plate and the right cover plate, the rollers slide on the surface of the slide groove, push the left cover plate and the right cover plate to move relative to each other to close the bottom opening of the explosion-proof box.

[0016] As a further improvement of the technical solution, a drop plate is provided inside the explosion-proof box, a buffer spring is provided between the drop plate and the explosion-proof box, and a steel wire rope is provided between the drop plate and the through groove. When the battery falls onto the surface of the drop plate, the drop plate moves inside the explosion-proof box under the action of gravity, and fixed pulleys are provided on both sides of the inner wall of the explosion-proof box. During the movement of the drop plate, the steel wire rope is pulled, and the steel wire rope moves along the surface of the fixed pulley, so that the left cover plate and the right cover plate move relative to each other.

[0017] As a further improvement of the technical solution, a limiting groove is provided on the surface of the left cover plate, and a fixing component is provided on the surface of the right cover plate. When the fixing component moves to the limiting groove, the position between the left cover plate and the right cover plate is fixed.

[0018] As a further improvement of the technical solution, energy absorption boxes are provided on both sides of the inner wall of the explosion-proof box, and baffles are provided at the ends of the energy absorption boxes. When the battery explodes, the baffles are used to buffer the explosion impact force.

[0019] As a further improvement of the present technical solution, the fixing assembly includes support rods arranged on both sides of the top of the right cover plate, the support rods are marked with a blocking block for rotation, a torsion spring is provided on the surface of the support rod, and the two ends of the torsion spring are respectively fixed on the support rod and the side wall of the blocking block, and the blocking block is subjected to the force of the torsion spring and forms an angle of 7.5° with the horizontal plane.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In this high-safety battery high and low temperature explosion-proof test box, the output end of the control motor drives the screw to rotate. Since the thread on the screw surface is symmetrical, the screw rotates to drive the placement plate to move relatively. When the placement plate moves to the end contact, the output shaft of the control motor stops rotating. By placing the battery on the surface of the placement plate, the control cylinder drives the motor to move, so that the battery placed on the surface of the placement plate moves to the center of the body, so that the battery surface is heated evenly, and the accuracy of the experimental results is improved.

[0022] 2. In the high-safety battery high and low temperature explosion-proof test box, the battery falls onto the surface of the drop plate, and the drop plate is compressed by the gravity of the battery to compress the buffer spring, so that the drop plate moves vertically inside the explosion-proof box. The drop plate pulls the wire rope during the movement, and the wire rope is pulled by external force to move in contact with the surface of the fixed pulley. The wire ropes on both sides of the drop plate pull the left cover plate and the right cover plate to move relative to each other during the movement. Since rollers are provided on both sides of the left cover plate and the right cover plate, the rollers slide on the inner wall of the slide groove, thereby quickly forming a closed state between the left cover plate and the right cover plate to the opening of the explosion-proof box, reducing safety hazards.

[0023] 3. In this high-safety battery high and low temperature explosion-proof test box, when the left cover and the right cover move relative to each other, the card block first fits with the slope surface at the end of the left cover, and the card block forms an angle of 7.5° with the horizontal plane. The card block slides along the slope surface of the left cover to the limit groove, and the external force on the card block disappears. The card block is clamped inside the limit groove by the force of the torsion spring, thereby realizing the fixing function between the left cover and the right cover to avoid damage to the internal parts of the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the substrate structure of the present invention;

[0026] Figure 3 is a cross-sectional view of a test assembly of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the sealing assembly of the present invention;

[0028] Figure 5 is a cross-sectional view of a sealing assembly of the present invention;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of point A;

[0030] Figure 7 The schematic diagram of the energy absorbing box structure of the present invention is

[0031] Figure 8 It is a schematic diagram of the closed structure of the left cover plate and the right cover plate of the present invention.

[0032] The meaning of each number in the figure is:

[0033] 100, machine body; 101, temperature sensor; 102, explosion-proof box; 103, energy absorption box; 104, baffle; 105, slideway; 106, fixed pulley;

[0034] 200, cylinder; 201, base plate; 202, carbon canister; 203, spray head;

[0035] 300, test assembly; 301, motor; 302, screw rod; 303, placement plate; 304, column tube; 305, slide rod; 306, compression spring; 307, clamping plate;

[0036] 400, sealing assembly; 401, left cover plate; 402, right cover plate; 403, roller; 404, drop plate; 405, buffer spring; 406, through groove; 407, wire rope; 408, limit groove;

[0037] 500, fixing assembly; 501, supporting rod; 502, clamping block; 503, torsion spring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The purpose of this embodiment is to provide a high-safety battery high and low temperature explosion-proof test box, see Figure 1-Figure 8 As shown, the machine body 100 includes a heating device and a cooling device inside the machine body 100, a temperature sensor 101 inside the machine body 100, and the temperature sensor 101 is used to obtain the real-time temperature inside the machine body 100. A groove is provided under the workbench of the machine body 100, and an explosion-proof box 102 is provided in the groove. A cylinder 200 is provided on the top of the machine body 100, and a base plate 201 is provided on the piston rod at the end of the cylinder 200. A test assembly 300 is provided under the base plate 201, and the test assembly 300 is used to place the battery to be tested. When the test During the process, the battery has a tendency to explode, and the control test component 300 pushes the battery to fall into the explosion-proof box 102. Slide grooves 105 are provided on both sides of the outer wall of the explosion-proof box 102. A sealing component 400 is provided on the surface of the explosion-proof box 102. The sealing component 400 is used to automatically seal the opening on the surface of the explosion-proof box 102 when the battery falls into the explosion-proof box 102 to prevent the battery explosion from impacting the inside of the body 100. A fixing component 500 is provided on the surface of the sealing component 400, and the fixing component 500 is used to reinforce the sealing component 400.

[0041] When conducting high-temperature tests on batteries, if the battery quality is unqualified and catches fire, in order to prevent the flame from spreading and causing damage to the internal parts of the equipment, a carbon canister 202 is provided on the top of the cylinder 200, and carbon powder is placed inside the carbon canister 202. A spray head 203 is provided at the bottom of the carbon canister 202. The opening and closing of the spray head 203 is controlled by an electric valve, and the state of the battery to be tested is observed through an observation window provided on the surface of the body 100. When the battery catches fire and smokes, the spray head 203 sprays carbon powder on the surface of the battery to extinguish the fire. During the test, the operator observes the observation window provided on the surface of the body 100. If the battery burns internally due to high temperature, the electric valve is controlled to spray the carbon dioxide carbon powder inside the carbon canister 202 through the spray head 203, so that the burning part of the battery is isolated from external oxygen, thereby quickly extinguishing the fire and avoiding damage to parts caused by fire inside the device, thereby increasing the service life of the device.

[0042] When the battery is subjected to temperature test, in order to make the battery be heated evenly and thus obtain accurate test results, the test assembly 300 includes a motor 301 disposed on one side of the substrate 201, a screw rod 302 is disposed on the surface of the output shaft of the motor 301, the thread on the surface of the screw rod 302 is symmetrical, and placement plates 303 are disposed on both sides of the surface of the screw rod 302. The screw rod 302 is controlled to rotate so that the placement plates 303 move relatively, and a placement surface is formed between the placement plates 303. The screw rod 302 is driven to rotate by the output end of the control motor 301. Since the thread on the surface of the screw rod 302 is symmetrical, the placement plates 303 are driven to move relatively when the screw rod 302 rotates. When the placement plates 303 move to the end contact, the output shaft of the control motor 301 stops rotating, and the battery is placed on the surface of the placement plate 303, and the cylinder 200 is controlled to drive the motor 301 to move, so that the battery placed on the surface of the placement plate 303 moves to the center of the body 100, so that the battery surface is heated evenly, thereby improving the accuracy of the battery test.

[0043] When the battery is placed on the placement surface directly formed by the placement plate 303, the placement plate 303 drives the battery to move into the body 100. In order to prevent the battery from sliding off the surface of the placement plate 303 and being damaged during the movement, a clamping plate 307 is provided at the end of the slide bar 305. The surface of the clamping plate 307 is provided with a plurality of heat dissipation holes. The clamping plate 307 is used to automatically limit and fix the battery placed on the placement surface formed between the placement plates 303. When the battery is placed, the clamping plates 307 are pressed to move away from each other. The clamping plates 307 are moved with The movable slide bar 305 slides on the inner wall of the column 304, and at the same time, the slide bar 305 squeezes the compression spring 306 to produce deformation, placing the battery between the clamps 307 and stopping squeezing the clamps 307. When the external force disappears, the slide bar 305 is reset by the force of the compression spring 306, so that the clamp 307 provided at the end of the slide bar 305 fits against the side wall of the battery. At the same time, by opening a plurality of heat dissipation holes on the surface of the clamp 307, when the internal environment of the body 100 is heated, the slow heat dissipation of the clamp 307 causing the battery to spontaneously combust is avoided, thereby improving the accuracy of the experiment.

[0044] When the battery spontaneously ignites during the experiment, carbon powder is sprayed on its surface through the spray head 203 to prevent it from burning. However, the internal materials of the battery are prone to chemical reactions and explosions, which may cause potential safety hazards to the temperature sensor 101 installed inside the body 100. Therefore, the sealing component 400 includes a left cover plate 401 and a right cover plate 402 installed on the surface of the explosion-proof box 102. A through groove 406 is opened at the center of the left cover plate 401 and the right cover plate 402. Rollers 403 are provided on both sides of the left cover plate 401 and the right cover plate 402. The rollers 403 slide on the surface of the slide groove 105 to push the left cover plate 401 and the right cover plate 402 to move relative to each other to close the bottom opening of the explosion-proof box 102. When the battery burns, the spray head 203 sprays carbon powder on the surface of the battery to prevent it from burning. Temporary flame retardancy is performed. After the spraying is completed, the output shaft of the control motor 301 drives the screw rod 302 to rotate in the opposite direction. The placement plates 303 provided on the surface of the screw rod 302 move in the direction of separation, so that there is a gap between the placement plates 303. At the same time, during the movement of the placement plates 303, the slide bar 305 at the end of the clamping plate 307 is pushed by the force of the compression spring 306 to push the battery. When the gap is larger than the battery size, the battery falls into the explosion-proof box 102 from the gap, and the surface of the explosion-proof box 102 is closed by pulling the left cover plate 401 and the right cover plate 402. Therefore, when a chemical reaction explosion occurs inside the battery, the explosion impact is minimized through the sealed space formed by the explosion-proof box 102 and the left cover plate 401 and the right cover plate 402, thereby improving the safety of the test.

[0045] Taking into account the chemical reaction inside the battery, the reaction speed is uncontrollable. Therefore, there is a safety hazard when the top opening of the explosion-proof box 102 is manually sealed by the left cover 401 and the right cover 402. Therefore, a drop plate 404 is provided inside the explosion-proof box 102, a buffer spring 405 is provided between the drop plate 404 and the explosion-proof box 102, and a steel wire rope 407 is provided between the drop plate 404 and the through groove 406. When the battery falls on the surface of the drop plate 404, the drop plate 404 moves inside the explosion-proof box 102 under the action of gravity. Fixed pulleys 106 are provided on both sides of the inner wall of the explosion-proof box 102. During the movement of the drop plate 404, the steel wire rope 407 is pulled, and the steel wire rope 407 moves along the surface of the fixed pulley 106, so that the left cover 401 and the right cover 402 move relative to each other. Energy absorption boxes 103 are provided on both sides of the inner wall of the explosion-proof box 102. The ends of the energy absorption boxes 103 A baffle 104 is provided. When the battery explodes, the baffle 104 buffers the explosion impact force. When the battery burns and is pushed into the explosion-proof box 102, the battery first falls onto the surface of the drop plate 404. The drop plate 404 is subjected to the gravity of the battery to compress the buffer spring 405, so that the drop plate 404 moves vertically inside the explosion-proof box 102. The drop plate 404 pulls the steel wire rope 407 during the movement. The steel wire rope 407 moves along the surface of the fixed pulley 106. The steel wire ropes 407 on both sides of the drop plate 404 pull the left cover plate 401 and the right cover plate 402 to move relative to each other during the movement. Since rollers 403 are provided on both sides of the left cover plate 401 and the right cover plate 402, the rollers 403 slide on the inner wall of the slide groove 105, thereby quickly forming a closed state between the left cover plate 401 and the right cover plate 402 to the opening of the explosion-proof box 102, thereby reducing the generation of safety hazards.

[0046] Considering that during the relative movement of the left cover plate 401 and the right cover plate 402, when the ends collide due to the inertial force, an opening is easily formed between the left cover plate 401 and the right cover plate 402. When the battery explodes, the internal materials splash from the opening into the body 100, which is easy to cause damage to the equipment. Therefore, a limiting groove 408 is provided on the surface of the left cover plate 401, and a fixing component 500 is provided on the surface of the right cover plate 402. When the fixing component 500 moves to the limiting groove 408, the position between the left cover plate 401 and the right cover plate 402 is fixed. The fixing component 500 includes support rods 501 arranged on both sides of the top of the right cover plate 402. The support rod 501 is marked with a block 502 for rotation, and the surface of the support rod 501 is provided with a torsion spring. Spring 503, both ends of the torsion spring 503 are respectively fixed on the support rod 501 and the side wall of the clamping block 502, and the clamping block 502 is subjected to the force of the torsion spring 503 and forms an angle of 7.5° with the horizontal plane. When the left cover plate 401 and the right cover plate 402 move relatively, the clamping block 502 first fits with the inclined surface of the end of the left cover plate 401, and the clamping block 502 forms an angle of 7.5° with the horizontal plane. The clamping block 502 is pushed by the tilt, so the clamping block 502 slides along the inclined surface of the left cover plate 401 to the limiting groove 408, and the external force on the clamping block 502 disappears. The clamping block 502 is clamped inside the limiting groove 408 by the force of the torsion spring 503, thereby realizing the fixing function between the left cover plate 401 and the right cover plate 402, avoiding damage to the internal parts of the body 100.

[0047] When in use, the output end of the motor 301 is controlled to drive the screw rod 302 to rotate. Since the thread on the surface of the screw rod 302 is symmetrical, the screw rod 302 drives the placement plate 303 to move relatively when it rotates. When the placement plate 303 moves to the end contact, the output shaft of the motor 301 is controlled to stop rotating. By placing the battery on the surface of the placement plate 303, the cylinder 200 is controlled to drive the motor 301 to move, so that the battery placed on the surface of the placement plate 303 moves to the center of the body 100, so that the battery surface is evenly heated, thereby improving the accuracy of the experimental results.

[0048] The output shaft of the control motor 301 drives the screw rod 302 to rotate in the opposite direction, and the placement plates 303 provided on the surface of the screw rod 302 move in the direction of separation, so that there is a gap between the placement plates 303. At the same time, during the movement of the placement plates 303, the slide bar 305 at the end of the clamping plate 307 is pushed by the force of the compression spring 306 to push the battery. When the gap is larger than the battery size, the battery falls into the explosion-proof box 102 from the gap. When the battery burns and is pushed into the explosion-proof box 102, the battery first falls onto the surface of the drop plate 404, and the drop plate 404 is compressed by the gravity of the battery. The buffer spring 405 , so that the drop plate 404 moves in the vertical direction. The drop plate 404 inside the explosion-proof box 102 pulls the wire rope 407 during the movement, and the wire rope 407 moves in contact with the surface of the fixed pulley 106. The wire ropes 407 on both sides of the drop plate 404 pull the left cover plate 401 and the right cover plate 402 to move relatively during the movement. Since rollers 403 are provided on both sides of the left cover plate 401 and the right cover plate 402, the rollers 403 slide on the inner wall of the slide groove 105, so that the left cover plate 401 and the right cover plate 402 quickly form a closed state on the opening of the explosion-proof box 102, reducing the potential safety hazards;

[0049] When the left cover 401 and the right cover 402 move relative to each other, the block 502 first fits against the inclined surface at the end of the left cover 401, and the block 502 forms an angle of 7.5° with the horizontal plane. The block 502 is pushed by the tilt, so that the block 502 slides along the inclined surface of the left cover 401 to the limiting groove 408, and the external force on the block 502 disappears. The block 502 is clamped inside the limiting groove 408 by the force of the torsion spring 503, thereby realizing the fixing function between the left cover 401 and the right cover 402, avoiding damage to the internal parts of the body 100.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-safety battery high and low temperature explosion-proof test box, characterized by: The invention comprises a machine body (100), wherein a heating device and a cooling device are provided inside the machine body (100), wherein a temperature sensor (101) is provided inside the machine body (100), wherein the temperature sensor (101) is used to obtain the real-time temperature inside the machine body (100), wherein a groove is provided below a workbench of the machine body (100), wherein an explosion-proof box (102) is provided in the groove, wherein a cylinder (200) is provided on the top of the machine body (100), wherein a piston rod at the end of the cylinder (200) is provided with a base plate (201), wherein a test assembly (300) is provided below the base plate (201), wherein the test assembly (300) is used to place a battery to be tested, and when During the test, the battery has a tendency to explode, and the control test component (300) pushes the battery to fall into the explosion-proof box (102). Slide grooves (105) are provided on both sides of the outer wall of the explosion-proof box (102). A sealing component (400) is provided on the surface of the explosion-proof box (102). The sealing component (400) is used to automatically seal the opening on the surface of the explosion-proof box (102) when the battery falls into the explosion-proof box (102) to prevent the battery explosion from impacting the inside of the body (100). A fixing component (500) is provided on the surface of the sealing component (400). The fixing component (500) is used to reinforce the sealing component (400).

2. The high-safety battery high and low temperature explosion-proof test box according to claim 1 is characterized in that: A carbon canister (202) is provided on the top of the cylinder (200), carbon powder is placed inside the carbon canister (202), and a spray head (203) is provided at the bottom of the carbon canister (202). The opening and closing of the spray head (203) is controlled by an electric valve, and the state of the battery to be tested is observed through an observation window provided on the surface of the body (100). When the battery catches fire and smokes, the spray head (203) sprays carbon powder on the surface of the battery to extinguish the fire.

3. The high-safety battery high and low temperature explosion-proof test box according to claim 1 is characterized in that: The test assembly (300) comprises a motor (301) arranged on one side of a substrate (201); a screw rod (302) is arranged on the surface of an output shaft of the motor (301); threads on the surface of the screw rod (302) are symmetrical; placement plates (303) are arranged on both sides of the surface of the screw rod (302); the placement plates (303) are relatively moved by controlling the rotation of the screw rod (302); and placement surfaces are formed between the placement plates (303).

4. The high-safety battery high and low temperature explosion-proof test box according to claim 3 is characterized in that: A column tube (304) is provided on one side of the placement plate (303), a sliding rod (305) is slidably provided on the inner wall of the column tube (304), and a compression spring (306) is provided between the column tube (304) and the sliding rod (305).

5. The high-safety battery high and low temperature explosion-proof test box according to claim 4 is characterized in that: A clamping plate (307) is provided at the end of the slide bar (305), and a plurality of heat dissipation holes are provided on the surface of the clamping plate (307). The clamping plate (307) is used to automatically limit and fix the battery placed between the placement plates (303) to form a placement surface.

6. The high-safety battery high and low temperature explosion-proof test box according to claim 1 is characterized in that: The sealing assembly (400) comprises a left cover plate (401) and a right cover plate (402) arranged on the surface of the explosion-proof box (102); a through groove (406) is provided at the center of the left cover plate (401) and the right cover plate (402); rollers (403) are provided on both sides of the left cover plate (401) and the right cover plate (402); the rollers (403) slide on the surface of the slide groove (105) to push the left cover plate (401) and the right cover plate (402) to move relative to each other to seal the bottom opening of the explosion-proof box (102).

7. The high-safety battery high and low temperature explosion-proof test box according to claim 6, characterized in that: A drop plate (404) is provided inside the explosion-proof box (102), a buffer spring (405) is provided between the drop plate (404) and the explosion-proof box (102), and a steel wire rope (407) is provided between the drop plate (404) and the through groove (406). When the battery falls onto the surface of the drop plate (404), the drop plate (404) moves inside the explosion-proof box (102) under the action of gravity. Fixed pulleys (106) are provided on both sides of the inner wall of the explosion-proof box (102). During the movement of the drop plate (404), the steel wire rope (407) is pulled, and the steel wire rope (407) moves in contact with the surface of the fixed pulley (106), so that the left cover plate (401) and the right cover plate (402) move relative to each other.

8. The high-safety battery high and low temperature explosion-proof test box according to claim 7 is characterized in that: A limiting groove (408) is provided on the surface of the left cover plate (401), and a fixing assembly (500) is provided on the surface of the right cover plate (402). When the fixing assembly (500) moves to the limiting groove (408), the position between the left cover plate (401) and the right cover plate (402) is fixed.

9. The high-safety battery high and low temperature explosion-proof test box according to claim 6, characterized in that: Energy absorption boxes (103) are provided on both sides of the inner wall of the explosion-proof box (102), and baffles (104) are provided at the ends of the energy absorption box (103). When the battery explodes, the baffles (104) buffer the explosion impact force.

10. The high-safety battery high and low temperature explosion-proof test box according to claim 9, characterized in that: The fixing assembly (500) comprises a support rod (501) arranged on both sides of the top of the right cover plate (402); the support rod (501) is provided with a block (502) for rotation; a torsion spring (503) is provided on the surface of the support rod (501); two ends of the torsion spring (503) are respectively fixed to the support rod (501) and the side wall of the block (502); the block (502) is subjected to the force of the torsion spring (503) and forms an angle of 7.5° with the horizontal plane.

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