A general lithium battery cover plate explosion-proof valve pressure detection device

Abstract

The utility model discloses a general lithium battery apron explosion -proof valve pressure detection device, including upper cavity and lower cavity, the lower cavity includes bottom plate and first side plate, second side plate, the recess is equipped with first screw rod in the bottom plate center, one end of first screw rod passes through first side plate, and the other end is equipped with sliding block, and the recess can be moved to sliding block through rotating first screw rod, the second side plate is equipped with through -hole, and the through -hole is connected high pressure gas passage and pressure detection device, the both sides of lower cavity are equipped with side face support plate, the side face support plate includes fixed plate and sliding plate, and be equipped with mobile propulsion mechanism between fixed plate and sliding plate, the utility model discloses simple structure, and the device volume is small, and can be placed in the required high -low temperature or high -low pressure environment, square aluminium shell apron of different shape, different volume size can be fixed on the device through three -way lock catch, and explosion -proof valve and this device form airtight space.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery cover plate explosion -proof valve pressure detection technical field, concretely is a kind of general lithium battery cover plate explosion -proof valve pressure detection device. BACKGROUND

[0002] Lithium battery explosion -proof valve is a safety device, mainly used to prevent lithium battery from exploding or catching fire under overcharge, short circuit or other fault conditions. Its working principle is that when the internal pressure of the battery exceeds the safety threshold, the explosion -proof valve will automatically open, releasing gas to reduce internal pressure and prevent the battery from rupturing or exploding. This device is crucial in the design of lithium batteries, especially in applications such as electric vehicles and electronic devices.

[0003] Explosion -proof valves may face extreme temperatures, pressures and corrosive gases in actual application. However, current test conditions may not fully simulate these real working conditions, resulting in test results that do not accurately reflect their actual performance.

[0004] Each cover plate needs to be designed with a dedicated explosion -proof valve detection device. The non-universal nature of the mold leads to high idle rate of the device. Testing different covers requires the development of different detection molds, resulting in high testing costs and time consumption.

[0005] The equipment for testing explosion -proof valves needs to be highly precise and reliable. However, the pressure machine connected to the current explosion -proof valve detection device changes with air pressure, and cannot display the maximum pressure during the measurement process, resulting in measurement errors and affecting the accuracy of test results.

[0006] Explosion -proof valves in actual use may be affected by various factors (such as wear, fatigue, corrosion, etc.) over a long period of time, and short-term laboratory tests may not be able to simulate these long-term effects, resulting in a gap between test results and actual performance in application. SUMMARY

[0007] The utility model aims at providing a kind of general lithium battery cover plate explosion -proof valve pressure detection device to solve the problems raised in the above background art. To achieve the above purpose, the utility model provides the following technical scheme: a kind of general lithium battery cover plate explosion -proof valve pressure detection device, including upper cavity and lower cavity, the lower cavity includes bottom plate and first side plate, second side plate, the bottom plate central is equipped with recess, the recess is equipped with first screw rod, one end of the first screw rod passes through first side plate, the other end is equipped with slider, by rotating first screw rod can make slider move in recess, the second side plate is equipped with through -hole, the through -hole is connected with high-pressure gas channel and pressure detection device, the two sides of the lower cavity are equipped with side support plate, the side support plate includes fixed plate and sliding plate, mobile propulsion mechanism is equipped between the fixed plate and sliding plate.

[0008] Preferably, the upper cavity comprises a fixing frame, four corners of the fixing frame are provided with propelling screws, the top of the first side plate and the second side plate are provided with a plurality of threaded holes, the tail end of the propelling screw is inserted into the threaded hole, and the bottom of the fixing frame is provided with a stop block.

[0009] Preferably, the second screw is arranged between the side support plates, the two ends of the second screw pass through the side support plates, and the middle position is provided with a positioning pin which is inserted into the groove to ensure that the two side support plates are relatively parallel.

[0010] Preferably, the moving propelling mechanism comprises an L-shaped connecting rod, one end of the L-shaped connecting rod is fixed in the fixing plate, the other end is provided with a threaded opening, the threaded opening is provided with a third screw, and the other end of the third screw abuts against the sliding plate.

[0011] Preferably, the inside of the first side plate is provided with a front pressing plate, the first side plate is provided with a fourth screw, and the end of the fourth screw abuts against the front pressing plate.

[0012] Preferably, the inside of the front pressing plate and the inside of the second side plate are provided with rubber pads, and the rubber pad on the inside of the second side plate is provided with a hole corresponding to the through hole.

[0013] Preferably, the top of the side support plate is provided with a rubber pad.

[0014] Compared with the prior art, the device has the advantages that: the device is novel in design, small in size, and can be placed in a required high-temperature or high-pressure environment, and the gas pipeline can pass through air, inert gas or corrosive gas;

[0015] Square aluminum shell cover plates of different sizes can be used for explosion-proof valve pressure detection by being fixed on the device through three-way buckles, and the explosion-proof valve and the device form a sealed space.

[0016] The disassembled cover plate can be polished and used to measure the explosion pressure of the explosion-proof valve, which has important reference significance for the safety of the battery cell in the later stage of life.

[0017] The device can be placed in a complex environment of different temperatures and different pressures, and different gases can be passed through to measure the explosion pressure, which greatly simulates the real use scene, and the test data is more reliable.

[0018] The pressure display number can display the maximum pressure value in the whole test process, and the measurement error is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model;

[0020] Figure 2 The utility model discloses a structure explosion map;

[0021] Figure 3 The utility model discloses a lower cavity structure schematic diagram in the utility model;

[0022] Figure 4 The utility model discloses a side support plate and second screw structure schematic diagram in the utility model;

[0023] Figure 5 The utility model discloses a side support plate structure schematic diagram in the utility model;

[0024] Figure 6 The utility model discloses an upper cavity structure schematic diagram in the utility model;

[0025] Figure 7 The utility model discloses the placement position schematic diagram of cover plate when carrying out pressure detection;

[0026] In the drawing, upper cavity-1, fixed frame-11, propelling screw-12, screw hole-13, stopper-14, lower cavity-2, bottom plate-21, first side plate-22, second side plate-23, recess-24, first screw-25, sliding block-26, through hole-27, side support plate-3, fixed plate-31, sliding plate-32, L type connecting rod-33, third screw-34, second screw-35, positioning pin-36, front compression plate-4, fourth screw 41, rubber pad-5, cover plate-6. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0028] Please refer to Figure 1 The utility model provides a kind of technical scheme: a general lithium battery cover plate explosion-proof valve pressure detection device, including upper cavity 1 and lower cavity 2, the lower cavity 2 includes bottom plate 21 and first side plate 22, second side plate 23, the bottom plate 21 is equipped with recess 24 in the center, first screw 25 is equipped in the recess 24, the recess 24 is used to position first screw 25, one end of the first screw 25 passes through first side plate 22, the other end is equipped with sliding block 26, by rotating first screw 25, sliding block 26 can be moved in recess 24, through hole 27 is opened in the second side plate 23, high-pressure gas passage and pressure detection device are circumscribed to the through hole 27, the pressure detection device can be pointer type, digital display or other detection gas pressure instrument.

[0029] The upper cavity 1 includes a fixed frame 11, the four corners of the fixed frame 11 are provided with propelling screws 12, the top of the first side plate 22 and the second side plate 23 are provided with a plurality of threaded holes 13, the end of the propelling screw 12 is inserted into the threaded hole 13, rotating the propelling screw 12 can control the up and down movement and disassembly of the upper cavity 1, the bottom of the fixed frame 11 is provided with a stop block 14, the stop block 14 is detachable, and is installed or adsorbed on the fixed frame 11 according to the size and shape of the cover plate, the stop block 14 is used for pressing the measured cover plate 6 to prevent air leakage during pressure detection.

[0030] The lower cavity 2 is provided with side support plates 3 on both sides, the top of the side support plate 3 is provided with a rubber pad 5, the side support plate 3 includes a fixed plate 31 and a sliding plate 32, the fixed plate 31 is divided into multiple length specifications, and can be selected and replaced according to the different sizes of the cover plate 6, and the total length of the sliding plate 32 should be greater than the propelling length.

[0031] The fixed plate 31 and the sliding plate 32 are provided with a moving propelling mechanism, the moving propelling mechanism includes an L-shaped connecting rod 33, one end of the L-shaped connecting rod 33 is fixed in the fixed plate 31, the other end is provided with a threaded opening, the threaded opening is provided with a third screw 34, the other end of the third screw 34 abuts against the sliding plate 32, and the distance between the fixed plate 31 and the sliding plate 32 is adjusted by rotating the third screw 34, so as to adjust the length of the whole side support plate 3.

[0032] The two side support plates 3 are provided with a second screw 35, the two ends of the second screw 35 pass through the side support plate 3, and a positioning pin 36 is arranged at the middle position, the positioning pin 36 is inserted into the groove 24 on the bottom plate 21 of the lower cavity 2, so as to ensure that the two side support plates 3 are relatively parallel, the distance between the two side support plates 3 is determined according to the size of the measured cover plate, and the minimum distance needs to be greater than the width of the explosion-proof valve.

[0033] The inside of the first side plate 22 is provided with a front pressing plate 4, the first side plate 22 is provided with a fourth screw 41, and the end of the fourth screw 41 abuts against the front pressing plate 4.

[0034] The inside of the front pressing plate 4 and the inside of the second side plate 23 are provided with rubber pads 5, and a hole corresponding to the through hole 27 is formed in the rubber pad on the inside of the second side plate 23.

[0035] In use, the measured cover plate 6 is placed horizontally on the side support plate 3, with the explosion-proof valve between the two side support plates 3, one side of the measured cover plate 6 abutting against the rubber pad of the second side plate 23, the fourth screw rod 41 is rotated to move the front pressing plate 4 towards the measured cover plate 6, until the rubber pad on the front pressing plate 4 abuts against the other side of the cover plate 6, the third screw rod 34 is rotated to make the sliding plate 32 abut against the front pressing plate 4, the first screw rod 25 is rotated to make the sliding block 26 close to the positioning pin 36 on the second screw rod 35, to ensure no air leakage, the advancing screw rod 12 is rotated to press the upper cavity 1 against the cover plate 6, thus forming a sealed space surrounded by the measured cover plate and the lower cavity 2, with the explosion-proof valve in the sealed space, air, inert gas or corrosive gas is introduced into the sealed space through the external pipeline connected to the through hole 27 to pressurize, until the measured cover plate explosion-proof valve breaks, the gas pressure detection table of the external pipeline is observed, the maximum value of the gas pressure in the test stage is shown on the table, and the value is the burst pressure value of the measured cover plate explosion-proof valve.

[0036] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A universal lithium battery cover explosion-proof valve pressure detection device, comprising an upper cavity (1) and a lower cavity (2), characterized in that: The lower cavity (2) includes a base plate (21), a first side plate (22), and a second side plate (23). The base plate (21) has a groove (24) in the center. A first screw (25) is provided in the groove (24). One end of the first screw (25) passes through the first side plate (22), and the other end is provided with a slider (26). By rotating the first screw (25), the slider (26) can move in the groove (24). A through hole (27) is provided on the second side plate (23). The through hole (27) is connected to a high-pressure gas channel and a pressure detection device. Side support plates (3) are provided on both sides of the lower cavity (2). The side support plates (3) include a fixed plate (31) and a sliding plate (32). A moving propulsion mechanism is provided between the fixed plate (31) and the sliding plate (32).

2. The universal lithium battery cover explosion-proof valve pressure detection device according to claim 1, characterized in that: The upper cavity (1) includes a fixed frame (11), and each of the four corners of the fixed frame (11) is provided with a push screw (12). The top of the first side plate (22) and the second side plate (23) are provided with multiple threaded holes (13). The end of the push screw (12) is inserted into the threaded hole (13). The bottom of the fixed frame (11) is provided with a stop block (14).

3. The universal lithium battery cover explosion-proof valve pressure detection device according to claim 2, characterized in that: A second screw (35) is provided between the side support plates (3). The two ends of the second screw (35) pass through the side support plates (3), and a positioning pin (36) is provided in the middle position. The positioning pin (36) is inserted into the groove (24) to ensure that the two side support plates (3) are relatively parallel.

4. The universal lithium battery cover explosion-proof valve pressure detection device according to claim 3, characterized in that: The moving propulsion mechanism includes an L-shaped connecting rod (33), one end of which is fixed inside the fixed plate (31), and the other end is provided with a threaded opening. A third screw (34) is provided inside the threaded opening, and the other end of the third screw (34) abuts against the sliding plate (32).

5. The universal lithium battery cover explosion-proof valve pressure detection device according to claim 4, characterized in that: The first side plate (22) has a front pressing plate (4) on its inner side, and a fourth screw (41) is provided on the first side plate (22), with the end of the fourth screw (41) abutting against the front pressing plate (4).

6. The universal lithium battery cover explosion-proof valve pressure detection device according to claim 5, characterized in that: The inner side of the front pressing plate (4) and the inner side of the second side plate (23) are both provided with rubber pads (5), and the rubber pad on the inner side of the second side plate (23) has a hole corresponding to the through hole (27).

7. The universal lithium battery cover explosion-proof valve pressure detection device according to claim 6, characterized in that: Each of the side support plates (3) is provided with a rubber pad (5) on its top.

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