Hitting type lithium battery thermal runaway detection device

Abstract

The utility model relates to the technical field of thermal runaway detection, in particular to a striking type lithium battery thermal runaway detection device which comprises a base, a detection box is fixedly connected to the outer wall of the top end of the base, a support is fixedly connected to the outer wall of the top end of the detection box, and a hydraulic rod is installed on the outer wall of the top end of the support. A pressing plate is fixedly connected to one end of a piston rod of the hydraulic rod, mounting grooves are formed in the outer walls of the two sides of the pressing plate correspondingly, supporting rods are slidably connected to the inner walls of the mounting grooves correspondingly, balls are fixedly connected to the outer walls of one sides of the supporting rods correspondingly, and annular plates are fixedly connected to the outer walls of the supporting rods correspondingly; the outer wall of each supporting rod is sleeved with a spring. According to the lithium battery thermal runaway detection device, the striking block can fall from a certain fixed height to strike a lithium battery, the accuracy is high, the falling height can be adjusted according to requirements so as to adjust the striking force, the corresponding striking block can be replaced according to requirements, the application range is wider, and the detection efficiency of lithium battery thermal runaway is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal runaway detection, in particular to a percussion type lithium battery thermal runaway detection device. Background Technique

[0002] A lithium battery is a battery with a lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Therefore, this kind of battery is also called a lithium metal battery. Different from other batteries, a lithium battery has characteristics such as high charging density, long life, and high unit cost. A lithium battery pack is an integration of multiple lithium batteries.

[0003] Lithium batteries need to reach a specified impact resistance. Otherwise, during use or transportation, they may burst due to insufficient strength during a collision. Therefore, before mass production, lithium batteries need to pass a percussion test of a specified strength. Currently, most of the testing methods are manual percussion tests. This process does not have relevant detection test equipment, resulting in poor stability and reliability of the detection data, low accuracy, inability to make the percussion structure strike the lithium battery stably with the same force, inability to adjust the percussion force according to requirements, a small scope of application, and reduced detection efficiency of lithium battery thermal runaway. Content of the Utility Model

[0004] The purpose of the utility model is to provide a percussion type lithium battery thermal runaway detection device to solve the problems raised in the above background technique.

[0005] The technical solution of the utility model is: a percussion type lithium battery thermal runaway detection device, including a base. The outer wall of the top end of the base is fixedly connected with a detection box. The outer wall of the top end of the detection box is fixedly connected with a support. A hydraulic rod is installed on the outer wall of the top end of the support. One end of the piston rod of the hydraulic rod is fixedly connected with a pressing plate. Installation grooves are respectively opened on the outer walls of both sides of the pressing plate. Support rods are slidably connected to the inner walls of the installation grooves. Spheres are fixedly connected to the outer walls of one sides of the support rods. Annular plates are fixedly connected to the outer walls of the support rods. Springs are sleeved on the outer walls of the support rods. The two ends of the springs are respectively fixedly connected with the annular plates and the pressing plate. Push blocks are fixedly connected to the outer walls of the other sides of the support rods. A rectangular groove is opened on the outer wall of the bottom end of the pressing plate. A mounting plate is slidably connected to the inner wall of the rectangular groove. A magnetic block is fixedly connected to the outer wall of the top end of the mounting plate. A slide rail is arranged on the outer wall of the bottom end of the mounting plate. A percussion block is slidably connected to the inner wall of the slide rail. A U-shaped frame is slidably connected to the outer wall of the support. Pressing blocks are fixedly connected to the outer walls of both sides of the U-shaped frame.

[0006] Preferably, the push blocks are all in a right trapezoidal shape, the magnetic block is in an isosceles trapezoidal shape, and the sizes of the push blocks and the magnetic block are adapted to each other.

[0007] Preferably, the outer walls of the bottom ends of the pressing plates are provided with inclined surfaces, which are located directly above the spheres, and the inclined surfaces are adapted to the sizes of the spheres.

[0008] Preferably, a placement plate is provided on the inner wall of the detection box, a camera is installed on one inner wall of the detection box, a feeding pipe is installed on the other inner wall of the detection box, a nozzle is connected to the outer wall of one side of the feeding pipe by a thread, and a dry powder pump is sleeved at one end of the feeding pipe.

[0009] Preferably, a limiting hole is formed in one outer wall of the U-shaped frame, and a locking knob is connected to the inner wall of the limiting hole by a thread, and the locking knob is adapted to the position of the bracket.

[0010] Preferably, the pressing block is slidably connected to the inner wall of the bracket, and a scale mark is provided on one outer wall of the bracket.

[0011] The present utility model hereby provides a percussion type lithium battery thermal runaway detection device through improvement. Compared with the prior art, it has the following improvements and advantages:

[0012] First: The present utility model is provided with a base, a detection box, a bracket, a U-shaped frame, a pressing plate, a pressing block, a magnetic block and a pushing block. When the pressing plate continues to rise, the inclined surface of the pressing block presses the sphere, and the two support rods cooperate with the annular plate to compress the spring, driving the pushing block to close and press the magnetic block. The magnetic block is separated from the pressing plate and drops to strike the lithium battery inside the detection box to test the thermal runaway data. The height of the U-shaped frame can be adjusted according to the requirements of different striking forces. When performing the thermal runaway test of the lithium battery, the striking block can fall from a certain fixed height to strike the lithium battery, with high accuracy, and the falling height can be adjusted according to the requirements to adjust the striking force, and the corresponding striking block can also be replaced according to the requirements, with a wider application range and improved detection efficiency of the lithium battery thermal runaway;

[0013] Second: The present utility model is provided with a support rod, a spring and a scale mark. The spring sleeved on the outer wall of the support rod facilitates the reset of the structure. A scale mark is provided on the outer wall of the bracket, which is convenient for accurately controlling the adjustment height of the U-shaped frame, thereby controlling the striking force and improving the practicability of the lithium battery thermal runaway detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following will further explain the present utility model in conjunction with the drawings and embodiments:

[0015] Figure 1 is the overall structural schematic diagram of the present utility model;

[0016] Figure 2 is the cross-sectional schematic diagram of the connection structure of the detection box of the present utility model;

[0017] Figure 3 It is a schematic diagram of the U-shaped frame connection structure of the present utility model;

[0018] Figure 4 It is a schematic cross-sectional view of the pressing plate connection structure of the present utility model.

[0019] Explanation of reference numerals:

[0020] 1. Base; 2. Detection box; 3. Scale mark; 4. Bracket; 5. U-shaped frame; 6. Hydraulic rod; 7. Locking knob; 8. Striking block; 9. Nozzle; 10. Pressing plate; 11. Placing plate; 12. Pressing block; 13. Support rod; 14. Sphere; 15. Ring plate; 16. Spring; 17. Magnet; 18. Pushing block; 19. Mounting plate. Specific implementation manner

[0021] The present utility model will be described in detail below. The technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] The present utility model provides a striking type lithium battery thermal runaway detection device through improvement. The technical solution of the present utility model is:

[0023] As Figures 1 - 4 shown, a striking type lithium battery thermal runaway detection device includes a base 1. The outer wall of the top end of the base 1 is fixedly connected with a detection box 2. The outer wall of the top end of the detection box 2 is fixedly connected with a bracket 4. A hydraulic rod 6 is installed on the outer wall of the top end of the bracket 4. One end of the piston rod of the hydraulic rod 6 is fixedly connected with a pressing plate 10. Installation grooves are respectively opened on the outer walls of both sides of the pressing plate 10. Support rods 13 are slidably connected to the inner walls of the installation grooves. Spheres 14 are fixedly connected to the outer walls of one sides of the support rods 13. Ring plates 15 are fixedly connected to the outer walls of the support rods 13. Springs 16 are sleeved on the outer walls of the support rods 13. The two ends of the springs 16 are respectively fixedly connected with the ring plates 15 and the pressing plate 10. Pushing blocks 18 are fixedly connected to the outer walls of the other sides of the support rods 13. A rectangular groove is opened on the outer wall of the bottom end of the pressing plate 10. A mounting plate 19 is slidably connected to the inner wall of the rectangular groove. A magnet 17 is fixedly connected to the outer wall of the top end of the mounting plate 19. A slide rail is arranged on the outer wall of the bottom end of the mounting plate 19. A striking block 8 is slidably connected to the inner wall of the slide rail. A U-shaped frame 5 is slidably connected to the outer wall of the bracket 4. Pressing blocks 12 are fixedly connected to the outer walls of both sides of the U-shaped frame 5.

[0024] Furthermore, the pushing blocks 18 are all arranged in a right trapezoid shape, the magnetic blocks 17 are arranged in an isosceles trapezoid shape, the sizes of the pushing blocks 18 and the magnetic blocks 17 are adapted to each other. The outer walls of the bottom ends of the pressing plates 10 are all provided with inclined surfaces, which are located directly above the spheres 14, and the inclined surfaces are adapted to the sizes of the spheres 14. A placing plate 11 is arranged on the inner wall of the detection box 2. A camera is installed on one inner wall of the detection box 2, and a feeding pipe is installed on the other inner wall of the detection box 2. A nozzle 9 is connected to the outer wall of one side of the feeding pipe by means of threads. One end of the feeding pipe is sleeved with a dry powder pump. When a lithium battery catches fire, the dry powder pump can be started, so that dry powder is ejected through the nozzle 9 for fire extinguishing treatment.

[0025] Furthermore, a limiting hole is formed in the outer wall of one side of the U-shaped frame 5, and a locking knob 7 is connected to the inner wall of the limiting hole by means of threads. The locking knob 7 is adapted to the position of the support 4. The pressing block 12 is slidably connected to the inner wall of the support 4. A scale mark 3 is arranged on the outer wall of one side of the support 4. The spring 16 sleeved on the outer wall of the support rod 13 facilitates the reset of the structure. A scale mark 3 is arranged on the outer wall of the support 4, which is convenient for accurately controlling the adjustment height of the U-shaped frame 5, so as to control the hitting force.

[0026] Working principle: When performing the impact thermal runaway detection of a lithium battery, the lithium battery to be detected is placed on the placing plate 11 of the detection box 2. The hitting block 8 is installed at the bottom of the mounting plate 19 through a slide rail. The mounting plate 19 is adsorbed on the bottom of the pressing plate 10 by the magnetic block 17. The U-shaped frame 5 is moved to a specified height according to the requirements of the impact test force. When an impact test is required, the hydraulic rod 6 is started, and the pressing plate 10 rises accordingly. When the pressing plate 10 moves close to the U-shaped frame 5, the pressing blocks 12 fixed on both sides of the U-shaped frame 5 are in contact with the spheres 14 on the support rods 13 on both sides of the pressing plate 10. When the pressing plate 10 continues to rise, the inclined surface of the pressing block 12 presses the sphere 14, and the two support rods 13 cooperate with the annular plate 15 to compress the spring 16, driving the pushing blocks 18 to close together to press the magnetic block 17. The magnetic block 17 is separated from the pressing plate 10 and falls off, so as to perform an impact test on the lithium battery inside the detection box 2 to obtain data on thermal runaway. The height of the U-shaped frame 5 can be adjusted according to the requirements of different impact forces. The locking knob 7 fixes the U-shaped frame 5. The spring 16 sleeved on the outer wall of the support rod 13 facilitates the reset of the structure. A scale mark 3 is arranged on the outer wall of the support 4, which is convenient for accurately controlling the adjustment height of the U-shaped frame 5, so as to control the hitting force.

[0027] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacements of the above technical features. The matters not covered in the present invention belong to the common general knowledge of those skilled in the art.

Claims

1. A striking type lithium battery thermal runaway detection device, comprising a base (1), characterized in that: The top outer wall of the base (1) is fixedly connected to a detection box (2), the top outer wall of the detection box (2) is fixedly connected to a bracket (4), the top outer wall of the bracket (4) is installed with a hydraulic rod (6), one end of the piston rod of the hydraulic rod (6) is fixedly connected to a pressing plate (10), both sides of the outer walls of the pressing plate (10) are provided with mounting grooves, the inner walls of the mounting grooves are slidably connected to support rods (13), one side outer wall of the support rod (13) is fixedly connected to a sphere (14), the outer wall of the support rod (13) is fixedly connected to an annular plate (15), and the outer wall of the support rod (13) is sleeved with a spring (16). The two ends of the spring (16) are respectively fixedly connected to the annular plate (15) and the pressing plate (10); the outer wall on the other side of the support rod (13) is fixedly connected with a push block (18); the outer wall at the bottom end of the pressing plate (10) is provided with a rectangular groove; the inner wall of the rectangular groove is slidably connected with a mounting plate (19); the top outer wall of the mounting plate (19) is fixedly connected with a magnetic block (17); the outer wall at the bottom end of the mounting plate (19) is provided with a slide rail; the inner wall of the slide rail is slidably connected with a striking block (8); the outer wall of the bracket (4) is slidably connected with a U-shaped frame (5); the outer walls on both sides of the U-shaped frame (5) are fixedly connected with pressing blocks (12).

2. The thermal runaway detection device for a lithium battery according to claim 1, characterized in that: The push blocks (18) are all arranged in a right-angle trapezoidal shape, the magnetic blocks (17) are arranged in an isosceles trapezoidal shape, and the sizes of the push blocks (18) and the magnetic blocks (17) are adapted.

3. The thermal runaway detection device for a striking lithium battery according to claim 1, characterized in that: The outer wall of the bottom end of the pressing plate (10) is provided with an inclined surface, the inclined surface is located directly above the sphere (14), and the size of the inclined surface is adapted to the size of the sphere (14).

4. The thermal runaway detection device for a striking lithium battery according to claim 1, characterized in that: The inner wall of the detection box (2) is provided with a placement plate (11), a camera is installed on the inner wall of one side of the detection box (2), and a feed pipe is installed on the inner wall of the other side of the detection box (2). The outer wall of one side of the feed pipe is connected to a nozzle (9) through a thread, and a dry powder pump is sleeved on one end of the feed pipe.

5. The thermal runaway detection device for a striking lithium battery according to claim 1, characterized in that: A limiting hole is provided on an outer wall of one side of the U-shaped frame (5), and a locking knob (7) is threadedly connected to the inner wall of the limiting hole, wherein the locking knob (7) is adapted to the position of the bracket (4).

6. The thermal runaway detection device for a striking lithium battery according to claim 1, characterized in that: The pressing block (12) is slidably connected to the inner wall of the bracket (4), and a scale mark (3) is provided on one side outer wall of the bracket (4).

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