Explosion-proof combined cap

Abstract

The utility model relates to the technical field of lithium batteries, and discloses an explosion-proof combined cap which comprises a cap body arranged at one end of a lithium battery; the connecting structure comprises a first connecting part and a second connecting part, the first connecting part comprises a first fixing ring plate fixedly installed at the top of the cap body, two sets of third clamping grooves are formed in the top of the first fixing ring plate, four sets of first clamping grooves are formed in the top of the cap body, and two sets of second clamping grooves are formed in the top of the cap body; an electrode plate is fixedly mounted at the top of the cap body; the second connecting part comprises a first protective gasket arranged at the top of the cap body, and four groups of first limiting holes are formed in the bottom of the first protective gasket, so that the purpose of limiting and fixing the device is achieved, the connecting effect of the cap is improved, the cap is convenient to dismount and mount, the mounting efficiency of the device is improved, and the fixing effect of the device is improved; and the use flexibility of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery technical field, specifically, relate to a kind of explosion-proof combination cap. BACKGROUND

[0002] Power lithium battery is widely used in new energy vehicles, energy storage systems and other fields due to its high energy density, long cycle life, light weight and small size. However, during the charging and discharging process of power lithium battery, especially in the case of overcharging or overdischarging, a large amount of heat and gas may be generated, leading to a sharp rise in internal pressure of the battery and a risk of explosion and combustion. Therefore, designing a reliable explosion-proof combination cap is crucial for ensuring the safe operation of power lithium battery.

[0003] The utility model discloses a kind of ultra-thin explosion-proof combination cap, including sealing ring;Boss, the lower end of the sealing ring is inwardly provided with boss;Explosion-proof sheet, the explosion-proof sheet is set on the boss of sealing ring lower end;Isolation ring, the isolation ring is set on the bottom periphery of explosion-proof sheet;Connecting aluminum sheet, the connecting aluminum sheet is set on the bottom of isolation ring;Steel cap, the steel cap is set on the top of explosion-proof sheet, and steel cap and explosion-proof sheet are fixed by wire welding periphery line. The ultra-thin explosion-proof combination cap, steel cap and explosion-proof sheet are directly connected by wire welding, the traditional riveting process is cancelled, the design height of sealing ring can be greatly reduced, the overall height of cap is greatly reduced, so that battery capacity is improved.

[0004] However, the above-mentioned patent still has the following problems: during long-term use, gaps may appear between the intermediate parts due to material aging, vibration, temperature changes and other factors. In particular, the gasket in the middle has poor limiting effect, which weakens the fixing effect of the entire device, thereby affecting the safety performance of the battery. Since the structure of the cap is relatively complex and the connection between the parts is special, it is relatively difficult to disassemble and install the device.

[0005] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0006] To solve the above-mentioned technical problem of poor limiting effect of the parts inside the cap, the basic idea of the technical solution of the utility model is:

[0007] An explosion-proof combination cap, comprising:

[0008] A cap body, the cap body is arranged at one end of the lithium battery;

[0009] The connecting structure comprises a first connecting part and a second connecting part, the first connecting part comprises a first fixed ring plate fixedly installed at the top of the cap body, the top of the first fixed ring plate is provided with two groups of third clamping grooves, the top of the cap body is provided with four groups of first clamping grooves, the top of the cap body is provided with two groups of second clamping grooves, and the top of the cap body is fixedly installed with an electrode plate; the second connecting part comprises a first protective gasket arranged at the top of the cap body, the bottom of the first protective gasket is provided with four groups of first limiting holes, the bottom of the first protective gasket is fixedly installed with four groups of first clamping plates, and the first clamping plates are clamped and installed in the second clamping grooves.

[0010] As a preferred embodiment of the utility model, the first connecting part further comprises a limiting ring plate arranged at the top of the cap body, the bottom of the limiting ring plate is fixedly installed with two groups of third clamping plates, the third clamping plates are clamped and installed in the third clamping grooves, the top of the limiting ring plate is fixedly installed with a cover, and a puller is arranged on the outer wall of the cover.

[0011] As a preferred embodiment of the utility model, the second connecting part further comprises a second fixed ring plate arranged at the top of the cap body, the top of the second fixed ring plate is fixedly installed with an anti-explosion sheet, the bottom of the second fixed ring plate is fixedly installed with a fourth clamping plate, and the fourth clamping plate is clamped and installed in the first limiting holes and the first clamping grooves.

[0012] As a preferred embodiment of the utility model, the top of the second fixed ring plate is provided with a first limiting groove, a first protective gasket is clamped and installed in the first limiting groove, a second protective gasket is fixedly installed at the top of the first protective gasket, and the top of the second fixed ring plate is fixedly installed with four groups of second clamping plates.

[0013] As a preferred embodiment of the utility model, the top of the cap body is provided with a third protective gasket, the inside of the third protective gasket is provided with four groups of second limiting holes, the bottom of the third protective gasket is tightly attached to the top of the second fixed ring plate, and the second clamping plates are clamped and installed in the second limiting holes.

[0014] As a preferred embodiment of the utility model, the inner wall of the limiting ring plate is fixedly installed with four groups of first limiting plates, the inside of the first limiting plates is provided with third limiting grooves, and the second clamping plates are clamped and installed in the third limiting grooves.

[0015] As a preferred embodiment of the utility model, the bottom of the limiting ring plate is provided with a second limiting groove, and the second protective gasket is clamped and installed in the second limiting groove.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Reach the purpose of limiting and fixing the device, improve the connection effect of the cap, facilitate the disassembly and installation of the cap, improve the installation efficiency of the device, improve the fixing effect of the device, improve the flexibility of the device.

[0018] 2. Reach the purpose of auxiliary fixing of the device, improve the connection effect of the device, limit the rubber ring, improve the placement effect of the rubber ring, improve the stability of the device.

[0019] 3. Reach the purpose of connecting and reinforcing the device, fully fill the gap between the parts, improve the connection strength of the device, prolong the service life of the device, improve the durability of the device, and optimize the use experience of the device.

[0020] The specific embodiments of the utility model will be described in further detail below in combination with the drawings. DRAWINGS

[0021] In the drawings:

[0022] Figure 1 It is the structure diagram of the utility model;

[0023] Figure 2 It is the split schematic view of the utility model;

[0024] Figure 3 It is the first limiting plate structure schematic view of the utility model;

[0025] Figure 4 It is the split schematic view of the utility model's explosion-proof sheet, first protective gasket and third protective gasket;

[0026] Figure 5 It is the split schematic view of the utility model's first fixed ring plate and first protective gasket;

[0027] Figure 6 It is the second fixed ring plate structure schematic view of the utility model;

[0028] Figure 7 It is the first clamping plate structure schematic view of the utility model.

[0029] In the figure: 10, cap body; 11, first fixed ring plate; 12, first clamping groove; 13, second clamping groove; 14, third clamping groove; 15, electrode plate; 16, first protective gasket; 17, first limiting hole; 18, first clamping plate; 19, second fixed ring plate; 20, explosion-proof sheet; 21, second clamping plate; 22, first limiting groove; 23, first protective gasket; 24, second protective gasket; 25, third protective gasket; 26, second limiting hole; 27, limiting ring plate; 28, third clamping plate; 29, second limiting groove; 30, first limiting plate; 31, third limiting groove; 32, cover; 33, tab; 34, fourth clamping plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, and the following embodiments are used to illustrate the utility model.

[0031] Embodiment one: an explosion-proof combined cap, specifically as shown in Figure 1 , Figure 2 , Figure 5 and Figure 7 , comprising a cap body 10, the cap body 10 is arranged at one end of a lithium battery; a connecting structure, the connecting structure comprises a first connecting part and a second connecting part, the first connecting part comprises a first fixed ring plate 11 fixedly installed at the top of the cap body 10, the top of the first fixed ring plate 11 is provided with two groups of third clamping grooves 14, the top of the cap body 10 is provided with four groups of first clamping grooves 12, the top of the cap body 10 is provided with two groups of second clamping grooves 13, and the top of the cap body 10 is fixedly installed with an electrode plate 15; the second connecting part comprises a first protective gasket 16 arranged at the top of the cap body 10, the bottom of the first protective gasket 16 is provided with four groups of first limiting holes 17, the bottom of the first protective gasket 16 is fixedly installed with four groups of first clamping plates 18, and the first clamping plates 18 are clamped and installed in the interiors of the second clamping grooves 13. The cap is limited and installed through the connecting structure, the first protective gasket 16 is placed at the top of the cap body 10, the first clamping plates 18 are clamped and installed in the interiors of the second clamping grooves 13, and the electrode plate 15 is placed in the interior of the first protective gasket 16.

[0032] Specifically as shown in Figure 1 , Figure 2 and Figure 3As shown, the first connecting part further comprises a limiting ring plate 27 arranged on the top of the cap body 10, the bottom of the limiting ring plate 27 is fixedly installed with two groups of third clamping plates 28, the third clamping plates 28 are clamped and installed in the third clamping groove 14, the top of the limiting ring plate 27 is fixedly installed with a cover 32, and the outer wall of the cover 32 is provided with a push piece 33. The limiting ring plate 27 is placed on the top of the first fixed ring plate 11, the third clamping plates 28 are clamped and installed in the third clamping groove 14, the push piece 33 is pushed, and the cover 32 is pushed away from the first fixed ring plate 11.

[0033] Specifically as Figure 1 、 Figure 4 and Figure 6 shown, the second connecting part further comprises a second fixed ring plate 19 arranged on the top of the cap body 10, the top of the second fixed ring plate 19 is fixedly installed with an anti-explosion sheet 20, the bottom of the second fixed ring plate 19 is fixedly installed with a fourth clamping plate 34, and the fourth clamping plate 34 is clamped and installed in the first limiting hole 17 and the first clamping groove 12. The fourth clamping plate 34 is clamped and installed in the first limiting hole 17 and the first clamping groove 12.

[0034] According to the above, through the structure of the cap body 10, the first fixed ring plate 11, the first clamping groove 12, the second clamping groove 13, the third clamping groove 14, the electrode plate 15, the first protective gasket 16, the first limiting hole 17, the first clamping plate 18, the second fixed ring plate 19, the anti-explosion sheet 20, the limiting ring plate 27, the third clamping plate 28, the cover 32, the push piece 33 and the fourth clamping plate 34, the purpose of limiting and fixing the device is achieved, the connection effect of the cap is improved, the cap is convenient to disassemble and install, the efficiency of installing the device is improved, the fixing effect of the device is improved, and the flexibility of using the device is improved.

[0035] Example two: based on example one, specifically as Figure 1 、 Figure 2 and Figure 4 shown, the top of the second fixed ring plate 19 is provided with a first limiting groove 22, the first limiting groove 22 is clamped and installed with a first protective gasket 23, the top of the first protective gasket 23 is fixedly installed with a second protective gasket 24, and the top of the second fixed ring plate 19 is fixedly installed with four groups of second clamping plates 21. The first protective gasket 23 is clamped and installed in the first limiting groove 22.

[0036] Specifically as Figure 1 、 Figure 2 and Figure 4As shown, the top of the cap body 10 is provided with a third protective gasket 25, and the inside of the third protective gasket 25 is provided with four second limiting holes 26. The bottom of the third protective gasket 25 is in close contact with the top of the second fixed ring plate 19, and the second clamping plate 21 is clamped and installed in the inside of the second limiting hole 26. Place the third protective gasket 25 on the top of the second fixed ring plate 19, and clamp and install the second clamping plate 21 in the inside of the second limiting hole 26.

[0037] According to the above, through the structure of the second fixed ring plate 19, the explosion-proof sheet 20, the second clamping plate 21, the first limiting groove 22, the first protective gasket 23, the second protective gasket 24, the third protective gasket 25 and the second limiting hole 26, the purpose of auxiliary fixing of the device is achieved, the connection effect of the device is improved, the rubber ring is limited, the placement effect of the rubber ring is improved, and the stability of the device is improved.

[0038] Example three: based on example one and example two, as shown in Figure 1 、 Figure 2 and Figure 3 , the inner wall of the limiting ring plate 27 is fixedly installed with four first limiting plates 30, and the inside of the first limiting plate 30 is provided with a third limiting groove 31. The second clamping plate 21 is clamped and installed in the inside of the third limiting groove 31. The limiting ring plate 27 is clamped and installed on the top of the first fixed ring plate 11, and the third limiting groove 31 is nested on the outer wall of the second clamping plate 21.

[0039] As shown in Figure 1 、 Figure 2 and Figure 3 , the bottom of the limiting ring plate 27 is provided with a second limiting groove 29, and the second protective gasket 24 is clamped and installed in the inside of the second limiting groove 29. The second protective gasket 24 is clamped and installed in the inside of the second limiting groove 29.

[0040] As described above, through the structure of the second protective gasket 24, the limiting ring plate 27, the second limiting groove 29, the first limiting plate 30 and the third limiting groove 31, the purpose of connecting and reinforcing the device is achieved, the gap between the parts is fully filled, the connection strength of the device is improved, the service life of the device is prolonged, the durability of the device is improved, and the use experience of the device is optimized.

[0041] Working principle: cap body 10 as the basis of the entire explosion-proof combination cap, it is fixedly installed at one end of the lithium battery, plays the role of closing and protecting the inside of the battery, the first connecting part, including the first fixed ring plate 11, the third clamping groove 14, the first clamping groove 12, the second clamping groove 13 and the electrode plate 15. These components jointly constitute a stable connecting frame for fixing and supporting other components, the second connecting part, including the first protective gasket 16, the first limiting hole 17, the first clamping plate 18, the second fixed ring plate 19, the explosion-proof sheet 20, the fourth clamping plate 34 and the like. These components form a tight protective layer through clamping and nesting, which is used for enhancing the explosion-proof performance of the cap, the explosion-proof sheet 20, as the core component of the explosion-proof combination cap, can quickly break and release the internal pressure when the internal pressure of the battery rises sharply, thereby preventing the battery from exploding, the first protective gasket 23, the second protective gasket 24 and the third protective gasket 25, the setting of these gaskets not only enhances the sealing performance of the cap, but also plays the role of buffering and protection, preventing external impact from causing damage to the battery, the first clamping plate 18, the second clamping plate 21 and the like clamping plate: through clamping installation, these plate components ensure the tight connection between components, improve the stability and explosion-proof performance of the entire cap, through the third clamping plate 28 clamping installation in the inside of the third clamping groove 14, the limiting ring plate 27 plays the role of fixing and limiting, ensures the stable installation of other components in the correct position, the setting of the knob 33 makes the cover 32 can be easily pried, thereby realizing the disassembly of the cap. This design not only facilitates maintenance, but also improves the flexibility of the cap, the first limiting plate 30 and the third limiting groove 31, the interaction of these components further enhances the stability of the cap, prevents the loosening and displacement between components, in the normal working state of the battery, the explosion-proof combination cap ensures the closure and safety of the battery through the tight connection and mutual cooperation between components. When the internal pressure of the battery abnormally rises, the explosion-proof sheet 20 will quickly break and release the internal pressure, thereby preventing the battery from exploding. At the same time, various protective gaskets and clamping plates also play the role of buffering and protection, further improving the explosion-proof performance of the cap. When disassembly or maintenance is needed, the cover 32 can be pried open by turning the knob 33, realizing the disassembly of the cap.

[0042] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. An explosion-proof combination cap, characterized in that, include: Cap body (10), cap body (10) is disposed at one end of lithium battery; The connection structure includes a first connection part and a second connection part. The first connection part includes a first fixing ring plate (11) fixedly installed on the top of the cap body (10). The top of the first fixing ring plate (11) is provided with two sets of third snap-fit ​​grooves (14). The top of the cap body (10) is provided with four sets of first snap-fit ​​grooves (12). The top of the cap body (10) is provided with two sets of second snap-fit ​​grooves (13). An electrode plate (15) is fixedly installed on the top of the cap body (10). The second connection part includes a first protective pad (16) provided on the top of the cap body (10). The bottom of the first protective pad (16) is provided with four sets of first limiting holes (17). The bottom of the first protective pad (16) is fixedly installed with four sets of first snap-fit ​​plates (18). The first snap-fit ​​plates (18) are snap-fitted into the inside of the second snap-fit ​​grooves (13).

2. The explosion-proof combination cap of claim 1, wherein The first connecting part also includes a limiting ring plate (27) disposed on the top of the cap body (10). Two sets of third snap-fit ​​plates (28) are fixedly installed at the bottom of the limiting ring plate (27). The third snap-fit ​​plates (28) are snap-fitted into the interior of the third snap-fit ​​groove (14). A cover (32) is fixedly installed on the top of the limiting ring plate (27). A paddle (33) is provided on the outer wall of the cover (32).

3. The explosion-proof combination cap of claim 1, wherein, The second connecting part also includes a second fixing ring plate (19) disposed on the top of the cap body (10). An explosion-proof plate (20) is fixedly installed on the top of the second fixing ring plate (19), and a fourth snap-fit ​​plate (34) is fixedly installed on the bottom of the second fixing ring plate (19). The fourth snap-fit ​​plate (34) is snap-fitted into the interior of the first limiting hole (17) and the first snap-fit ​​groove (12).

4. The explosion-proof combination cap of claim 3, wherein, The top of the second fixing ring plate (19) is provided with a first limiting groove (22), a first protective washer (23) is snapped into the inside of the first limiting groove (22), a second protective washer (24) is fixedly installed on the top of the first protective washer (23), and four sets of second snap-fit ​​plates (21) are fixedly installed on the top of the second fixing ring plate (19).

5. The explosion-proof combination cap of claim 1, wherein, The top of the cap body (10) is provided with a third protective washer (25), and the interior of the third protective washer (25) is provided with four sets of second limiting holes (26). The bottom of the third protective washer (25) is in close contact with the top of the second fixing ring plate (19), and the second snap-fit ​​plate (21) is snap-fitted into the interior of the second limiting hole (26).

6. The explosion-proof combination cap of claim 2, wherein, Four sets of first limiting plates (30) are fixedly installed on the inner wall of the limiting ring plate (27). The first limiting plate (30) has a third limiting groove (31) inside, and the second snap-fit ​​plate (21) is snap-fitted into the inside of the third limiting groove (31).

7. The explosion-proof combination cap of claim 2, wherein, The bottom of the limiting ring plate (27) is provided with a second limiting groove (29), and the second protective washer (24) is snapped into the inside of the second limiting groove (29).

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