New energy lithium battery detection auxiliary equipment

Abstract

The present application relates to a kind of new energy lithium battery detection auxiliary equipment, including front hinged test box of sealing door and control unit, the inside of the test box is provided with heating device and temperature sensor electrically connected with control unit, the inside of the test box is connected with cross bar, the middle part of the cross bar is provided with connecting block, the lower end of the connecting block is detachably connected with steel needle, two vertical boards are detachably connected on the cross bar near its both ends, and wedge block is respectively arranged on the opposite surface of two vertical boards;Supporting plate is provided on the inner rear wall of the test box, two side plates are symmetrically arranged at the both ends of the supporting plate, a horizontal rod is respectively slidably connected on each side plate, and extrusion plate is respectively arranged at the opposite end of two horizontal rods;The present application fills the blank in the prior art by being extruded or punctured under the heating state of lithium battery.

Description

Technical Field

[0001] This invention relates to the field of lithium battery testing technology, and in particular to an auxiliary device for testing new energy lithium batteries. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the positive / negative electrode materials and a non-aqueous electrolyte solution. The lithium metal battery was first proposed and researched by Gilbert N. Lewis in 1912. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require very strict environmental controls. With the development of science and technology, lithium-ion batteries have become mainstream.

[0003] Lithium battery testing refers to the process of conducting various performance and safety tests on lithium batteries. Lithium batteries are a commonly used type of battery in modern electronic products. Their advantages, such as high power density, high energy density, long lifespan, and fast charging speed, make them widely used in mobile electronic devices, electric vehicles, and other fields. However, due to differences in manufacturing processes, material selection, and operating environments, the performance and safety of lithium batteries from different brands and models vary. Therefore, comprehensive and accurate testing of lithium batteries is crucial. Lithium battery safety issues typically manifest as combustion and explosion, the root cause of which lies in thermal runaway within the battery. External factors such as overcharging, fire sources, compression, puncture, and short circuits can also lead to safety problems.

[0004] After lithium batteries are manufactured, they undergo a series of tests before reaching consumers to ensure battery safety and minimize potential hazards. Current technologies typically perform compression and puncture tests on lithium batteries at room temperature to assess their safety performance, focusing on whether the battery catches fire or explodes after compression or puncture. However, traffic accidents usually occur unexpectedly during driving. In such cases, the lithium batteries in electric vehicles, having undergone prolonged discharge, experience a rapid temperature increase, a key factor leading to thermal runaway, combustion, or explosion. Current technology lacks equipment to perform compression and puncture tests on heated lithium batteries, making it impossible to assess the safety performance of electric vehicle lithium batteries under compression or puncture during driving. Therefore, there is an urgent need to design an auxiliary testing device for new energy lithium batteries that simulates compression or puncture during electric vehicle operation. Summary of the Invention

[0005] This invention provides an auxiliary testing device for new energy lithium batteries, which performs compression or puncture testing on lithium batteries under heated conditions. This solves the problem in the prior art of lacking equipment for compression and puncture testing of lithium batteries under heated conditions, making it impossible to assess the safety performance of electric vehicle lithium batteries when they are compressed or punctured during driving.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a new energy lithium battery testing auxiliary equipment, including a test chamber with a sealed door hinged at the front end and a control unit. The test chamber is equipped with a heating device and a temperature sensor electrically connected to the control unit. A crossbar is lifted and connected inside the test chamber. A connecting block is provided in the middle of the crossbar. A steel needle is detachably connected to the lower end of the connecting block. Two vertical plates are detachably connected to the crossbar near its two ends. Wedge-shaped blocks are respectively provided on the opposite surfaces of the two vertical plates. A support plate is provided on the inner rear wall of the test chamber. Two side plates are symmetrically arranged at both ends of the support plate. A horizontal rod is slidably connected to each side plate. A pressing plate is provided at the opposite ends of the two horizontal rods. A tension spring is provided between the side plate and the pressing plate on the same side. Rollers are rotatably connected to the opposite ends of the two horizontal rods. The two rollers are in contact with wedge blocks on the same side.

[0007] Preferably, a ball screw is rotatably connected to one side of the test chamber, and a screw nut that is fixedly connected to a crossbar is threaded onto the ball screw. A guide rod is provided on the other side of the test chamber, and a guide sleeve that is fixedly connected to the crossbar is slidably connected to the guide rod. A motor whose output end is fixedly connected to the ball screw is provided at the upper end of the test chamber, and the motor is electrically connected to the control unit.

[0008] Preferably, the upper end of the vertical plate is provided with a U-shaped groove for the crossbar to pass through, and the side wall of the U-shaped groove is provided with a first threaded hole for the bolt to pass through.

[0009] Preferably, the lower end of the connecting block has a second threaded hole in the middle, and the upper end of the steel needle has an external thread that matches the second threaded hole.

[0010] Preferably, the connecting block is an electromagnet electrically connected to the control unit, and the steel needle is made of magnetic steel.

[0011] Preferably, the support plate has a clearance hole in the middle.

[0012] Preferably, a water tank is provided at the bottom of the test chamber, and an annular spray pipe is provided on the inner side wall of the test chamber. The water outlet direction of the nozzle on the annular spray pipe is inclined inward and downward. The water tank and the annular spray pipe are connected by a water pipe. A water pump electrically connected to the control unit is provided on the water pipe. A flame sensor electrically connected to the control unit is provided inside the test chamber.

[0013] Preferably, the water pipe is provided with a housing, and a water turbine blade is rotatably connected inside the housing. The rotating shaft of the water turbine blade extends into the interior of the test chamber and is fixedly connected to a fan blade. A ventilation opening is provided on the side wall of the test chamber. A telescopic device electrically connected to the control unit is provided near the ventilation opening. The telescopic end of the telescopic device is provided with a sealing plate for opening and closing the ventilation opening.

[0014] Preferably, an activated carbon filter is provided at the vent.

[0015] Preferably, the water tank is provided with a water inlet at the upper end, a filter screen is provided at the water inlet, and a return pipe with the water outlet direction facing the filter screen is provided at the lower end of the side wall of the test chamber.

[0016] Compared to existing technologies, this invention utilizes a test chamber, control unit, heating device, temperature sensor, crossbar, connecting block, steel needle, and support plate in a coordinated configuration. After the lithium battery to be tested is placed on the support plate and the sealing door is closed, the control unit controls the heating device to heat the interior of the test chamber. Once the temperature sensor detects that the temperature has risen to the set temperature, the crossbar descends, and the connecting block drives the steel needle to descend and pierce the lithium battery. The safety performance of the lithium battery when punctured during driving is evaluated by observing whether the lithium battery catches fire or explodes. This invention fills a gap in existing technologies.

[0017] Compared to existing technologies, this invention utilizes a test chamber, control unit, heating device, temperature sensor, crossbar, vertical plate, wedge blocks, support plate, side plate, horizontal bar, compression plate, rollers, and tension springs in a coordinated configuration. After the lithium battery to be tested is placed on the support plate and the sealing door is closed, the control unit controls the heating device to heat the interior of the test chamber. Once the temperature sensor detects that the temperature has risen to the set temperature, the crossbar descends, causing two wedge blocks to descend via two vertical plates. The two wedge blocks then gradually compress the two compression plates inward via two horizontal bars. The two compression plates compress the lithium battery, and the safety performance of the battery under pressure during driving is assessed by observing whether it catches fire or explodes. This invention fills a gap in existing technologies.

[0018] Compared to existing technologies, this invention utilizes a test chamber, control unit, heating device, temperature sensor, crossbar, connecting block, steel needle, vertical plate, wedge block, support plate, side plate, horizontal bar, compression plate, roller, and tension spring in a coordinated configuration. After the lithium battery to be tested is placed on the support plate and the sealing door is closed, the control unit controls the heating device to heat the interior of the test chamber. Once the temperature sensor detects that the temperature has risen to the set temperature, the crossbar descends, causing the steel needle and two vertical plates to descend simultaneously. The two vertical plates then cause two wedge blocks to descend. The two wedge blocks gradually compress the two compression plates inward through the two horizontal bars. As the steel needle pierces the lithium battery, the two compression plates compress the lithium battery. By observing whether the lithium battery catches fire or explodes, the safety performance of the battery under the external coupling force of puncture and compression during operation after installation on an electric vehicle is evaluated, filling a gap in existing technologies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 2 This is a side view of the vertical plate structure of the present invention; Figure 3 This is a top view of the support plate structure of the present invention; Figure 4 This is a top view of the water tank structure of the present invention; Figure 5 This is a top view schematic diagram of the annular spray pipe structure of the present invention; Figure 6 This is a schematic diagram of the side cross-sectional structure of the housing of the present invention; Figure 7 This is a schematic diagram of the control system structure of the present invention.

[0020] In the diagram: 1. Test chamber; 2. Control unit; 3. Heating device; 4. Crossbar; 5. Connecting block; 6. Steel needle; 7. Vertical plate; 8. Wedge block; 9. Support plate; 10. Side plate; 11. Horizontal bar; 12. Extrusion plate; 13. Roller; 14. Tension spring; 15. U-groove; 16. First threaded hole; 17. Ball screw; 18. Screw nut; 19. Guide rod; 20. Guide sleeve; 21. Motor; 22. Activated carbon filter; 23. Return pipe; 24. Clearance hole; 25. Temperature sensor; 26. Water tank; 27. Annular spray pipe; 28. Water pipe; 29. ​​Water pump; 30. Flame sensor; 31. Housing; 32. Water turbine blade; 33. Fan blade; 34. Ventilation opening; 35. Telescopic device; 36. Sealing plate. Detailed Implementation

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1-7 As shown, a new energy lithium battery testing auxiliary equipment includes a test chamber 1 with a sealed door hinged at the front end and a control unit 2. The test chamber 1 is equipped with a heating device 3 and a temperature sensor 25 that are electrically connected to the control unit 2. A crossbar 4 is lifted and connected inside the test chamber 1. A connecting block 5 is provided in the middle of the crossbar 4. A steel needle 6 is detachably connected to the lower end of the connecting block 5. Two vertical plates 7 are detachably connected to the crossbar 4 near its two ends. Wedge-shaped blocks 8 are respectively provided on the opposite surfaces of the two vertical plates 7. A support plate 9 is provided on the inner rear wall of the test chamber 1. Two side plates 10 are symmetrically arranged at both ends of the support plate 9. A horizontal rod 11 is horizontally slidably connected to each side plate 10. A pressing plate 12 is provided at the opposite ends of the two horizontal rods 11. A tension spring 14 is provided between the side plate 10 and the pressing plate 12 on the same side. Rollers 13 are rotatably connected to the opposite ends of the two horizontal rods 11. The two rollers 13 are in contact with the wedge block 8 on the same side.

[0023] 1. Puncture test under heating conditions: After removing the two vertical plates 7 separately, place the lithium battery to be tested on the support plate 9 and close the sealing door. The control unit 2 controls the heating device 3 to heat the inside of the test chamber 1. After the temperature sensor 25 detects that the temperature has risen to the set temperature, the crossbar 4 descends and drives the steel needle 6 to descend through the connecting block 5 to puncture the lithium battery. Observe whether the lithium battery catches fire or explodes to evaluate its safety performance when punctured during driving after being installed on the electric vehicle. 2. Extrusion test under heating conditions: After disassembling the steel needle 6 separately, place the lithium battery to be tested on the support plate 9 and close the sealing door. The control unit 2 controls the heating device 3 to heat the inside of the test chamber 1. After the temperature sensor 25 detects that the temperature has risen to the set temperature, the horizontal bar 4 descends and drives the two wedge blocks 8 to descend through the two vertical plates 7. The two wedge blocks 8 gradually squeeze the two extrusion plates 12 inward through the two horizontal bars 11. The two extrusion plates 12 squeeze the lithium battery and observe whether the lithium battery catches fire or explodes to evaluate its safety performance when squeezed during driving after being installed on the electric vehicle. 3. Extrusion and puncture test under heating conditions: After installing the two vertical plates 7 and the steel needle 6, place the lithium battery to be tested on the support plate 9 and close the sealing door. The control unit 2 controls the heating device 3 to heat the inside of the test chamber 1. After the temperature sensor 25 detects that the temperature has risen to the set temperature, the horizontal bar 4 descends, causing the steel needle 6 and the two vertical plates 7 to descend simultaneously. The two vertical plates 7 drive the two wedge blocks 8 to descend. The two wedge blocks 8 gradually squeeze the two extrusion plates 12 inward through the two horizontal bars 11. During the process of the steel needle 6 descending and puncturing the lithium battery, the two extrusion plates 12 squeeze the lithium battery. Observe whether the lithium battery catches fire or explodes to evaluate its safety performance under the action of external coupling force of puncture and extrusion during the driving process after it is installed on the electric vehicle.

[0024] Preferably, the heating device 3 is an infrared heater or an electric heating grid, and the control unit 2 is a microcontroller.

[0025] To achieve the purpose of puncture and / or crush testing of lithium batteries, preferably, a ball screw 17 is rotatably connected to one side of the test chamber 1, and a screw nut 18 fixedly connected to the crossbar 4 is threaded onto the ball screw 17. A guide rod 19 is provided on the other side of the test chamber 1, and a guide sleeve 20 fixedly connected to the crossbar 4 is slidably connected to the guide rod 19. A motor 21 with its output end fixedly connected to the ball screw 17 is provided at the upper end of the test chamber 1, and the motor 21 is electrically connected to the control unit 2.

[0026] In use, the control unit 2 controls the motor 21 to rotate in the forward or reverse direction, driving the ball screw 17 to rotate synchronously. Under the guidance of the guide rod 19 on the guide sleeve 20, the screw nut 18 drives the crossbar 4 to rise or fall, so that the two vertical plates 7 and / or the steel needles 6 rise or fall, achieving the purpose of puncturing or / and squeezing the lithium battery.

[0027] To facilitate the assembly and disassembly of the vertical plate 7, preferably, the upper end of the vertical plate 7 is provided with a U-shaped groove 15 for the horizontal bar 4 to pass through, and the side wall of the U-shaped groove 15 is provided with a first threaded hole 16 for the bolt to pass through. During installation, the vertical plate 7 is moved from bottom to top so that the horizontal bar 4 is located between the two side walls of the U-shaped groove 15. After the bolt passes through the first threaded hole 16, it abuts against the horizontal bar 4, thus achieving the installation and fixation of the vertical plate 7. During disassembly, the bolt can be removed, making assembly and disassembly convenient.

[0028] To facilitate the assembly and disassembly of the steel needle 6, preferably, a second threaded hole is provided in the middle of the lower end of the connecting block 5, and an external thread that matches the second threaded hole is provided in the upper end of the steel needle 6. The steel needle 6 is fixedly connected to the connecting block 5 through the external thread that matches the second threaded hole in its upper end, making assembly and disassembly convenient.

[0029] To facilitate the installation and removal of the steel needle 6, preferably, the connecting block 5 is an electromagnet electrically connected to the control unit 2, and the steel needle 6 is made of magnetic steel. When the steel needle 6 is installed, the electromagnet is energized to generate magnetism to attract the steel needle 6 to complete the installation. When disassembling, the electromagnet is de-energized.

[0030] In order to avoid interference between the steel needle 6 and the support plate 9 after piercing the lithium battery, preferably, the support plate 9 is provided with a clearance hole 24 in the middle.

[0031] To extinguish the fire of the lithium battery, preferably, a water tank 26 is installed at the bottom of the test chamber 1, and an annular spray pipe 27 is installed on the inner side wall of the test chamber 1. The water outlet direction of the nozzle on the annular spray pipe 27 is inclined inward and downward. The water tank 26 and the annular spray pipe 27 are connected by a water pipe 28. A water pump 29 electrically connected to the control unit 2 is installed on the water pipe 28. A flame sensor 30 electrically connected to the control unit 2 is installed inside the test chamber 1.

[0032] When in use, if the detected lithium battery catches fire, the flame sensor 30 transmits the fire signal to the control unit 2. The control unit 2 then controls the water pump 29 to start, which delivers water from the water tank 26 to each nozzle of the annular spray pipe 27 and sprays it out to extinguish the fire in time, thus preventing the gases produced by continuous combustion from causing continuous pollution and damage to the surrounding environment.

[0033] To prevent the lithium battery from reigniting during fire suppression, preferably, a housing 31 is provided on the water pipe 28, and a water turbine blade 32 is rotatably connected inside the housing 31. The shaft of the water turbine blade 32 extends into the interior of the test chamber 1 and is fixedly connected to a fan blade 33. A ventilation opening 34 is provided on the side wall of the test chamber 1, and a telescopic device 35 electrically connected to the control unit 2 is provided near the ventilation opening 34. A sealing plate 36 for opening and closing the ventilation opening 34 is provided at the telescopic end of the telescopic device 35.

[0034] When in use, after the tested lithium battery catches fire, the control unit 2 controls the telescopic device 35 to open the vent 34. During the process of the water pump 29 delivering water from the water tank 26 to each nozzle of the annular spray pipe 27, the water flow impacts the water wheel blades 32, causing the water wheel blades 32 to rotate. The rotating water wheel blades 32 drive the fan blades 33 to rotate through the shaft, so that the smoke generated by the lithium battery combustion and the heat inside the test chamber 1 are discharged from the vent 34 in time, and the interior of the test chamber 1 is cooled down quickly. Since the thermal runaway of the lithium battery is a chemical reaction, it is generally an oxygen-free combustion. Therefore, cooling is an important means to prevent reignition.

[0035] Preferably, the telescopic device 35 is an electric push rod or a cylinder.

[0036] To achieve the goal of environmental protection, preferably, an activated carbon filter 22 is installed at the ventilation opening 34. The activated carbon filter can adsorb and purify the discharged harmful gases, thus protecting the environment.

[0037] To achieve the goal of saving water resources, preferably, the upper end of the water tank 26 is provided with a water inlet and a filter screen is provided at the water inlet. The lower end of the side wall of the test chamber 1 is provided with a return pipe 23 with the water outlet direction facing the filter screen. After the fire is extinguished, the water flows back from the return pipe 23 to the water tank 26 for filtration and reuse, thus saving water resources.

[0038] Compared to existing technologies, this invention utilizes a combination of a test chamber 1, a control unit 2, a heating device 3, a temperature sensor 25, a crossbar 4, a connecting block 5, a steel needle 6, and a support plate 9. After placing the lithium battery to be tested on the support plate 9 and closing the sealed door, the control unit 2 controls the heating device 3 to heat the interior of the test chamber 1. Once the temperature sensor 25 detects that the temperature has risen to the set temperature, the crossbar 4 descends, driving the steel needle 6 down through the connecting block 5 to pierce the lithium battery. The safety performance of the lithium battery when punctured during driving after installation on an electric vehicle is evaluated by observing whether the lithium battery catches fire or explodes. This invention fills a gap in existing technologies.

[0039] Compared to existing technologies, this invention utilizes a combination of a test chamber 1, a control unit 2, a heating device 3, a temperature sensor 25, a crossbar 4, vertical plates 7, wedge blocks 8, a support plate 9, side plates 10, a horizontal bar 11, a compression plate 12, rollers 13, and a tension spring 14. After the lithium battery to be tested is placed on the support plate 9 and the sealing door is closed, the control unit 2 controls the heating device 3 to heat the interior of the test chamber 1. Once the temperature sensor 25 detects that the temperature has risen to the set temperature, the crossbar 4 descends, causing the two wedge blocks 8 to descend via the two vertical plates 7. The two wedge blocks 8 gradually compress the two compression plates 12 inward via the two horizontal bars 11. The two compression plates 12 compress the lithium battery, and the safety performance of the lithium battery under pressure during driving is evaluated by observing whether it catches fire or explodes after installation on an electric vehicle. This invention fills a gap in existing technologies.

[0040] Compared to existing technologies, this invention utilizes a combination of a test chamber 1, a control unit 2, a heating device 3, a temperature sensor 25, a crossbar 4, a connecting block 5, a steel needle 6, a vertical plate 7, a wedge block 8, a support plate 9, a side plate 10, a horizontal bar 11, a compression plate 12, a roller 13, and a tension spring 14. After placing the lithium battery to be tested on the support plate 9 and closing the sealed door, the control unit 2 controls the heating device 3 to heat the interior of the test chamber 1. Once the temperature sensor 25 detects that the temperature has risen to the set temperature, the crossbar 4 descends, causing the steel needle 6 and the two vertical plates 7 to descend simultaneously. The two vertical plates 7 then cause the two wedge blocks 8 to descend. The two wedge blocks 8 gradually compress the two compression plates 12 inwards via the two horizontal bars 11. As the steel needle 6 pierces the lithium battery, the two compression plates 12 compress the lithium battery. By observing whether the lithium battery catches fire or explodes, the safety performance under the external coupling force of puncture and compression during driving after installation on an electric vehicle is evaluated, filling a gap in existing technologies.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new energy lithium battery testing auxiliary device, comprising a test chamber (1) with a sealed door hinged at the front end and a control unit (2), characterized in that: The test chamber (1) is equipped with a heating device (3) and a temperature sensor (25) electrically connected to the control unit (2). The test chamber (1) is connected to a horizontal bar (4) with a lifting connection. A connecting block (5) is provided in the middle of the horizontal bar (4). A steel needle (6) is detachably connected to the lower end of the connecting block (5). Two vertical plates (7) are detachably connected to the horizontal bar (4) near its two ends. Wedge blocks (8) are provided on the opposite surfaces of the two vertical plates (7). A support plate (9) is provided on the inner rear wall of the test chamber (1). Two side plates (10) are symmetrically arranged at both ends of the support plate (9). A horizontal rod (11) is horizontally slidably connected to each side plate (10). A pressing plate (12) is provided at the opposite ends of the two horizontal rods (11). A tension spring (14) is provided between the side plate (10) and the pressing plate (12) on the same side. Rollers (13) are rotatably connected to the opposite ends of the two horizontal rods (11). The two rollers (13) are in contact with the wedge block (8) on the same side.

2. The auxiliary testing equipment for new energy lithium batteries according to claim 1, characterized in that: A ball screw (17) is rotatably connected to one side of the test chamber (1). A screw nut (18) fixedly connected to the crossbar (4) is threaded onto the ball screw (17). A guide rod (19) is provided on the other side of the test chamber (1). A guide sleeve (20) fixedly connected to the crossbar (4) is slidably connected to the guide rod (19). A motor (21) with its output end fixedly connected to the ball screw (17) is provided at the upper end of the test chamber (1). The motor (21) is electrically connected to the control unit (2).

3. The auxiliary testing equipment for new energy lithium batteries according to claim 1 or 2, characterized in that: The upper end of the vertical plate (7) is provided with a U-shaped groove (15) for the horizontal bar (4) to pass through, and the side wall of the U-shaped groove (15) is provided with a first threaded hole (16) for the bolt to pass through.

4. The auxiliary testing equipment for new energy lithium batteries according to claim 3, characterized in that: The lower end of the connecting block (5) is provided with a second threaded hole, and the upper end of the steel needle (6) is provided with an external thread that matches the second threaded hole.

5. The auxiliary testing equipment for new energy lithium batteries according to claim 3, characterized in that: The connecting block (5) is an electromagnet electrically connected to the control unit (2), and the steel needle (6) is made of magnetic steel.

6. A new energy lithium battery testing auxiliary device according to claim 4 or 5, characterized in that: The support plate (9) is provided with a clearance hole (24) in the middle.

7. The auxiliary testing equipment for new energy lithium batteries according to claim 6, characterized in that: A water tank (26) is provided below the test chamber (1). An annular spray pipe (27) is provided on the inner wall of the test chamber (1). The water outlet direction of the nozzle on the annular spray pipe (27) is inclined inward and downward. The water tank (26) and the annular spray pipe (27) are connected by a water pipe (28). A water pump (29) electrically connected to the control unit (2) is provided on the water pipe (28). A flame sensor (30) electrically connected to the control unit (2) is provided inside the test chamber (1).

8. The auxiliary testing equipment for new energy lithium batteries according to claim 7, characterized in that: The water pipe (28) is provided with a housing (31), and a water turbine blade (32) is rotatably connected inside the housing (31). The rotating shaft of the water turbine blade (32) extends into the interior of the test chamber (1) and is fixedly connected with a fan blade (33). A vent (34) is provided on the side wall of the test chamber (1). A telescopic device (35) electrically connected to the control unit (2) is provided near the vent (34). A sealing plate (36) for opening and closing the vent (34) is provided at the telescopic end of the telescopic device (35).

9. The auxiliary testing equipment for new energy lithium batteries according to claim 8, characterized in that: An activated carbon filter (22) is provided at the ventilation opening (34).

10. A new energy lithium battery testing auxiliary device according to claim 7, 8 or 9, characterized in that: The water tank (26) is provided with an inlet at the upper end, and a filter screen is provided at the inlet. The test chamber (1) is provided with a return pipe (23) with the water outlet direction facing the filter screen at the lower end of the side wall.

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