Lithium battery cover plate convenient to assemble

Abstract

The utility model relates to the technical field of lithium battery cover plates, in particular to a lithium battery cover plate convenient to assemble, which comprises a cover plate body, the cover plate body is clamped on an output end of a lithium battery pack, a plastic plate is clamped on one side of the cover plate body close to the lithium battery pack, and a pole is inserted between the cover plate body and the plastic plate. One end of the pole is electrically connected with the output end of the lithium battery pack, a cavity used for being filled with flame-retardant gas is formed in the upper end of the cover plate body, and a sealing plate used for sealing the cavity covers the upper end of the cavity; when the lithium battery is overheated, the air pressure in the cavity is increased, the sealing plate is extruded, and the flame-retardant gas in the cavity leaks, so that the situation that the air pressure in the cavity is reduced, the spring extrudes the fixed plate and the connecting column pulls the sealing plate to seal the cavity after the phenomena of combustion and overheating of the lithium battery pack disappear is prevented, and the lithium battery cover plate has a flame-retardant function and is relatively high in safety performance.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery cover plates, in particular to a lithium battery cover plate which is easy to assemble. Background Art

[0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as positive and negative electrode materials and uses non-aqueous electrolyte solution. Lithium battery is mainly composed of shell, diaphragm, electrolyte, cover and other structures. The lithium battery cover is assembled at the power connection end of the lithium battery.

[0003] Existing lithium battery cover plates, such as the battery cover plate proposed in patent application number "CN202120267156.1", can prevent the insulating sheet from shifting or being installed inaccurately through structures such as the cover plate body, the snap-on assembly, the insulating assembly, and the limiting protrusion, thereby avoiding short circuits.

[0004] However, when the lithium battery is running, the output end of the lithium battery is electrically connected to the cover plate, the temperature of the battery output end rises, and the temperature of the cover plate body and other structures rises. If the lithium battery overheats, it will cause the battery to burn, which is prone to fire accidents. The safety performance of the lithium battery cover plate is poor. Therefore, a lithium battery cover plate that is easy to assemble is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a lithium battery cover plate that is easy to assemble, so as to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A lithium battery cover plate that is easy to assemble, comprising a cover plate body, the cover plate body being clamped on the output end of a lithium battery pack, a plastic plate being clamped on one side of the cover plate body close to the lithium battery pack, a pole being inserted between the cover plate body and the plastic plate, and one end of the pole being electrically connected to the output end of the lithium battery pack;

[0008] A cavity for filling with flame-retardant gas is formed at the upper end of the cover body, and a sealing plate for sealing the cavity is provided on the upper end cover of the cavity. A connecting column is fixedly connected to one side of the cover plate located in the cavity, and the connecting column passes through the bottom of the cover body, and a fixing plate is fixedly connected to the end of the connecting column. A spring is fixedly connected between the fixing plate and the bottom of the cover body, and the spring is sleeved on the connecting column.

[0009] Preferably, a mounting hole is formed through the cover body, the mounting hole passes through the plastic plate, the pole is inserted into the mounting hole, and one end of the pole is clamped between the plastic plate and the lithium battery pack.

[0010] Preferably, an insulating cylinder is fixedly connected to the upper end of the plastic plate, the insulating cylinder passes through the mounting hole, the pole passes through the inside of the insulating cylinder, and the end of the insulating cylinder is snap-fitted with the upper end of the cover body.

[0011] Preferably, a fixing ring is fixedly connected to the lower end of the cover body, a groove is provided on the upper end of the plastic plate, the fixing ring is snap-fitted with the groove, and a sealing gasket is snap-fitted between the cover body and the plastic plate.

[0012] Preferably, both ends of the cover body are fixed with plug plates, the upper end of the side wall of the lithium battery pack is fixed with a mounting frame, both ends of the mounting frame are provided with card slots, two groups of plug plates are respectively located at both ends of the plastic plate, and the two groups of plug plates are both inserted into the card slots, and the ends of the two groups of plug plates are respectively engaged with the ends of the inner walls of the two groups of card slots.

[0013] Preferably, the two groups of plug board side walls are fixed with elastic pressing blocks, and the two groups of elastic pressing blocks are respectively squeezed and matched with the inner walls of the two groups of slots. A sealing ring is clamped on the upper end of the installation frame, and the inner wall of the sealing ring is tightly fitted with the side wall of the plug board.

[0014] Beneficial effects of the utility model:

[0015] The utility model is electrically connected to the pole through the output end of the lithium battery pack, the cover plate body is clamped and assembled with one end of the lithium battery pack, and the plastic plate isolates the cover plate body from the lithium battery pack. When the lithium battery is overheated, the air pressure in the cavity increases, squeezing the sealing plate, and the flame-retardant gas in the cavity leaks out to prevent the lithium battery pack from burning. After the overheating phenomenon disappears, the air pressure in the cavity decreases, and the spring squeezes the fixed plate, so that the connecting column pulls the sealing plate to close the cavity. The lithium battery cover plate has a flame retardant function and high safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the cover body of the utility model;

[0019] Figure 3 This is a schematic diagram of the explosion structure of the cover plate of the utility model;

[0020] Figure 4 yes Figure 2 A schematic diagram of the structure at A;

[0021] Figure 5 yes Figure 2 A schematic diagram of the structure at B;

[0022] The reference numerals in the figures are as follows:

[0023] 1. Lithium battery pack; 2. Mounting frame; 3. Card slot; 4. Cover body; 5. Plastic plate; 6. Insert plate; 8. Elastic pressure block; 9. Sealing pad; 10. Insulating cylinder; 11. Pole; 12. Sealing ring; 13. Mounting hole; 14. Cavity; 15. Closing plate; 16. Connecting column; 17. Spring; 18. Fixing ring; 19. Groove; 20. Fixing plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A lithium battery cover that is easy to assemble, such as Figure 1-Figure 5 As shown, it includes a cover body 4, the cover body 4 is clamped on the output end of the lithium battery pack 1, a plastic plate 5 is clamped on one side of the cover body 4 close to the lithium battery pack 1, a pole 11 is inserted between the cover body 4 and the plastic plate 5, and one end of the pole 11 is electrically connected to the output end of the lithium battery pack 1;

[0026] The upper end of the cover body 4 is provided with a cavity 14 for filling with flame-retardant gas, and the upper end of the cavity 14 is covered with a sealing plate 15 for sealing the cavity 14. A connecting column 16 is fixedly connected to one side of the cover located in the cavity 14. The connecting column 16 passes through the bottom of the cover body 4, and a fixing plate 20 is fixedly connected to the end of the connecting column 16. A spring 17 is fixedly connected between the fixing plate 20 and the bottom of the cover body 4, and the spring 17 is sleeved on the connecting column 16.

[0027] The output end of the lithium battery pack 1 is electrically connected to the pole 11, the plastic plate 5 and the pole 11 are fixedly installed at the output end of the lithium battery pack 1 through the cover body 4, the cover body 4 is snap-fitted and assembled with one end of the lithium battery pack 1, the plastic plate 5 isolates the cover body 4 from the lithium battery pack 1, and the sealing plate 15 seals the inside of the cavity 14. When the lithium battery is overheated, the air pressure in the cavity 14 increases, squeezing the sealing plate 15, causing the connecting column 16 to slide, the spring 17 is compressed, and the flame-retardant gas in the cavity 14 leaks to prevent the lithium battery pack 1 from burning. After the overheating phenomenon disappears, the air pressure in the cavity 14 decreases, the spring 17 squeezes the fixing plate 20, causing the connecting column 16 to pull the sealing plate 15 to close the cavity 14. The lithium battery cover has a flame retardant function and a high safety performance.

[0028] The cover body 4 is provided with a mounting hole 13 , which penetrates the plastic plate 5 . The pole 11 is inserted into the mounting hole 13 , and one end of the pole 11 is clamped between the plastic plate 5 and the lithium battery pack 1 .

[0029] like Figure 1-Figure 3 As shown, the mounting hole 13 facilitates the installation of the pole 11, so that the pole 11 passes through the cover body 4 and the plastic plate 5, which facilitates the electrical connection of the pole 11 with the external connector. The end of the pole 11 close to the lithium battery pack 1 is located between the plastic plate 5 and the lithium battery pack 1, and is electrically connected to the output end of the lithium battery pack 1.

[0030] An insulating tube 10 is fixedly connected to the upper end of the plastic plate 5 . The insulating tube 10 passes through the mounting hole 13 . The pole 11 passes through the inside of the insulating tube 10 . The end of the insulating tube 10 is snap-fitted with the upper end of the cover body 4 .

[0031] like Figure 2 As shown, the insulating tube 10 prevents the cover body 4 and the pole 11 from contacting each other, and prevents the cover body 4 and the pole 11 from being connected to each other and causing a short circuit.

[0032] A fixing ring 18 is fixedly connected to the lower end of the cover body 4 , a groove 19 is formed at the upper end of the plastic plate 5 , the fixing ring 18 is snap-fitted with the groove 19 , and a sealing gasket 9 is snap-fitted between the cover body 4 and the plastic plate 5 .

[0033] like Figure 2 As shown, the fixing ring 18 is docked with the groove 19 to facilitate docking and installation between the cover body 4 and the plastic plate 5. The sealing gasket 9 seals the cover body 4 and the plastic plate 5 to prevent impurities or liquids from entering therebetween and provides a certain space for the movement of the fixing plate 20.

[0034] Both ends of the cover body 4 are fixedly connected with plug plates 6, the upper end of the side wall of the lithium battery pack 1 is fixedly connected with a mounting frame 2, both ends of the mounting frame 2 are provided with card slots 3, two groups of plug plates 6 are respectively located at both ends of the plastic plate 5, and the two groups of plug plates 6 are both inserted into the card slots 3, and the ends of the two groups of plug plates 6 are respectively engaged with the ends of the inner walls of the two groups of card slots 3.

[0035] like Figure 1-Figure 4 As shown, the shape of the card slot 3 is an inverted "L" shape. When the cover is assembled, the plug-in plates 6 at both ends of the cover body 4 are aligned with the upper end of the mounting frame 2 and plugged in, so that the two sets of plug-in plates 6 are plugged into the card slot 3. An elastic card plate is provided at the plug-in end, and the elastic card plate is snap-fitted with the side wall of the end of the card slot 3 to snap-fit ​​and assemble the cover and the mounting frame 2. The outer wall of the mounting frame 2 and the outer wall of the lithium battery pack 1 can be wrapped with waterproof insulating tape to further ensure the assembly firmness of the cover.

[0036] The side walls of the two groups of plug boards 6 are fixed with elastic pressing blocks 8, which are respectively squeezed and matched with the inner walls of the two groups of slots 3. A sealing ring 12 is clamped on the upper end of the installation frame 2, and the inner wall of the sealing ring 12 is tightly fitted with the side walls of the plug boards 6.

[0037] like Figure 1-Figure 4As shown, the elastic card plate squeezes the side wall of the plug plate 6 and the inner wall of the card slot 3 to prevent the plug plate 6 from moving left and right in the card slot 3. The sealing ring 12 seals the inside of the card slot 3 and increases the friction between the plug plate 6 and the mounting frame 2 to prevent the plug plate 6, the sealing gasket 9, and the mounting frame 2 from easily separating.

[0038] The working principle of the lithium battery cover provided by the utility model which is easy to assemble is as follows:

[0039] The output end of the lithium battery pack 1 is electrically connected to the pole 11, the cover body 4 is snap-fitted and assembled with one end of the lithium battery pack 1, and the plastic plate 5 isolates the cover body 4 from the lithium battery pack 1. When the lithium battery is overheated, the air pressure in the cavity 14 increases, squeezing the sealing plate 15, and the flame-retardant gas in the cavity 14 leaks to prevent the lithium battery pack 1 from burning. After the overheating phenomenon disappears, the air pressure in the cavity 14 decreases, and the spring 17 squeezes the fixing plate 20, so that the connecting column 16 pulls the sealing plate 15 to close the cavity 14. The lithium battery cover has a flame retardant function and a high safety performance.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A lithium battery cover plate that is easy to assemble, comprising a cover plate body (4), characterized in that: The cover body (4) is clamped on the output end of the lithium battery pack (1), a plastic plate (5) is clamped on one side of the cover body (4) close to the lithium battery pack (1), a pole (11) is inserted between the cover body (4) and the plastic plate (5), and one end of the pole (11) is electrically connected to the output end of the lithium battery pack (1); The upper end of the cover plate body (4) is provided with a cavity (14) for filling with flame-retardant gas, the upper end of the cavity (14) is covered with a sealing plate (15) for sealing the cavity (14), a connecting column (16) is fixedly connected to one side of the cover plate located in the cavity (14), the connecting column (16) passes through the bottom of the cover plate body (4), and a fixing plate (20) is fixedly connected to the end of the connecting column (16), a spring (17) is fixedly connected between the fixing plate (20) and the bottom of the cover plate body (4), and the spring (17) is sleeved on the connecting column (16).

2. The lithium battery cover plate that is easy to assemble according to claim 1, characterized in that: The cover plate body (4) is provided with a mounting hole (13), the mounting hole (13) penetrates the plastic plate (5), the pole (11) is inserted into the mounting hole (13), and one end of the pole (11) is clamped between the plastic plate (5) and the lithium battery pack (1).

3. A lithium battery cover plate that is easy to assemble according to claim 2, characterized in that: An insulating tube (10) is fixedly connected to the upper end of the plastic plate (5), the insulating tube (10) passes through the mounting hole (13), the pole (11) passes through the inside of the insulating tube (10), and the end of the insulating tube (10) is snap-fitted with the upper end of the cover body (4).

4. The lithium battery cover plate that is easy to assemble according to claim 1, characterized in that: A fixing ring (18) is fixedly connected to the lower end of the cover body (4), a groove (19) is provided at the upper end of the plastic plate (5), the fixing ring (18) and the groove (19) are snap-fitted together, and a sealing gasket (9) is snap-fitted between the cover body (4) and the plastic plate (5).

5. The lithium battery cover plate that is easy to assemble according to claim 1, characterized in that: Both ends of the cover plate body (4) are fixedly connected with plug plates (6); the upper end of the side wall of the lithium battery pack (1) is fixedly connected with a mounting frame (2); both ends of the mounting frame (2) are provided with card slots (3); two groups of plug plates (6) are respectively located at the two ends of the plastic plate (5); the two groups of plug plates (6) are both inserted into the card slots (3); and the ends of the two groups of plug plates (6) are respectively engaged with the ends of the inner walls of the two groups of card slots (3).

6. The lithium battery cover plate that is easy to assemble according to claim 5, characterized in that: The side walls of the two groups of plug plates (6) are fixedly connected with elastic pressing blocks (8), and the two groups of elastic pressing blocks (8) are respectively pressed and matched with the inner walls of the two groups of slots (3). The upper end of the installation frame (2) is clamped with a sealing ring (12), and the inner wall of the sealing ring (12) is tightly fitted with the side wall of the plug plate (6).

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