Structure of square implosion cell shell

Abstract

The invention relates to the technical field of battery explosion-proof structures, in particular to a square implosion cell shell structure which comprises a square shell, the shell comprises a shell body and a cover plate, an explosion-proof device is arranged on the shell and comprises a connecting part, one end of the connecting part is arranged on the shell, and the other end of the connecting part is connected with a protection part. An inner cavity is formed between the connecting part and the protection part, a pressure relief part is arranged in the inner cavity in a sliding mode, a reset part is arranged between the pressure relief part and the protection part, and the pressure relief part abuts against the connecting part under the action of the reset part so as to seal the shell. By arranging the explosion-proof device, the connecting parts are respectively arranged on the shell and / or the cover plate, and when the internal pressure of the shell is too large, the pressure relief part can compress the reset part to move towards the direction of the protective cover, so that the inner cavity is communicated with the interior of the battery shell, gas in the battery can be quickly released, and the risk of battery explosion is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery explosion-proof structures, and particularly to a structure of a square inner-explosion cell housing. Background Art

[0002] Square batteries are a common type of battery. Their housings usually use aluminum or steel shells as packaging materials, which have high strength and stability and can protect components such as electrodes and electrolytes inside the battery from the external environment. The internal structure of square batteries is compact, the materials are arranged closely, and the cell gaps are small. More active substances can be accommodated in the same volume, and there is more room for improving the energy density. Moreover, the overall structure is relatively simple, and it is easier to expand the capacity and carry out combined design when the battery capacity or power needs to be increased.

[0003] However, although existing square batteries all have explosion-proof designs, with the development of current energy storage technologies, the capacity and power of batteries are getting larger and larger. When a battery encounters an emergency, such as during use, charging, or storage, the internal pressure may increase rapidly due to various reasons (such as overcharging, over-discharging, short circuit, high temperature, etc.). Traditional explosion-proof structures cannot quickly release the internal pressure, and there are relatively high safety risks for the batteries. Summary of the Invention

[0004] The purpose of the present invention is to provide a structure of a square inner-explosion cell housing to solve the above-mentioned deficiencies in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A structure of a square inner-explosion cell housing includes a housing arranged in a square shape. The housing includes a shell body and a cover plate. An explosion-proof device is provided on the housing. The explosion-proof device includes a connecting part. One end of the connecting part is arranged on the housing, and the other end is connected with a protection part. An inner cavity is formed between the connecting part and the protection part. A pressure relief part is slidably arranged in the inner cavity. A reset part is arranged between the pressure relief part and the protection part. The pressure relief part abuts against the connecting part under the action of the reset part to seal the housing.

[0007] Further, the connecting part includes a fixing ring. One end of the fixing ring extends into the housing and is threadedly connected with the housing. The other end of the fixing ring is fixedly provided with a connecting ring. The connecting ring is connected with the protection part. A first sealing ring is arranged between the fixing ring and the housing.

[0008] Further, the pressure relief part includes a pressure ring slidably connected inside the connection ring. An explosion-proof cover is arranged in the middle of the pressure ring. A first inclined surface is arranged on the inner wall of the connection ring. A second inclined surface adapted to the first inclined surface is arranged at the outer end of the pressure ring. A second sealing ring is arranged on one side of the fixed ring facing the connection ring. Under the action of the reset part, the pressure ring is closely attached to the fixed ring to seal the outer shell. A first channel for pressure relief is formed between the pressure ring and the first inclined surface.

[0009] Further, a positioning ring is fixedly arranged on the inner wall of the pressure ring, and the explosion-proof cover is fixedly arranged on the positioning ring.

[0010] Further, the reset part is a compression spring. The compression spring is arranged between the protective cover and the pressure ring and is arranged outside the positioning ring.

[0011] Further, the protection part includes a protective cover. The protective cover is snap-connected to the fixed ring. The fixed ring, the connection ring and the protective cover together form an inner cavity.

[0012] Further, a plurality of fixing platforms are fixedly arranged on the outer side of the fixed ring. The plurality of fixing platforms are annularly distributed. A second channel for pressure relief is formed between adjacent fixing platforms. Fixing grooves are formed on each of the fixing platforms. A plurality of fixing rods corresponding to the positions of the fixing grooves one by one are fixedly arranged inside the protective cover. A locking block is fixedly arranged at the end of the fixing rod.

[0013] Further, a sliding groove communicating with the fixing groove is further arranged on the fixing platform. The locking block is slidably connected to the sliding groove. A limiting rod is also fixedly arranged on the locking block. A limiting groove corresponding to the limiting rod is further arranged on the fixing platform. The limiting groove communicates with the fixing groove.

[0014] Further, both the fixing rod and the limiting rod are made of elastic materials.

[0015] Further, a safety cone is arranged on one side of the protective cover facing the inner cavity. The top of the safety cone is pointed.

[0016] In the above technical solution, the beneficial effects of the structure of a square inner-explosion cell outer shell provided by the present invention are as follows:

[0017] By providing an explosion-proof device with the connection parts respectively arranged on the shell and / or the cover plate, when the pressure inside the outer shell is too high, the pressure relief part will compress the reset part and move towards the protective cover direction, so that the inner cavity is communicated with the inside of the battery outer shell, enabling the gas inside the battery to be quickly released, thereby reducing the risk of battery explosion and effectively improving the safety performance of battery use.

[0018] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0019] This application document provides an overview of various implementations or examples of the technologies described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in this invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the overall structure provided for the embodiments of the present invention;

[0022] Figure 2 Schematic diagram of the overall structure of the explosion-proof device provided for the embodiments of the present invention;

[0023] Figure 3 Schematic diagram of the sectional structure of the explosion-proof device provided for the embodiments of the present invention;

[0024] Figure 4 Schematic diagram of the explosion structure of the explosion-proof device provided for the embodiments of the present invention Figure 1 ;

[0025] Figure 5 Schematic diagram of the explosion structure of the explosion-proof device provided for the embodiments of the present invention Figure 2 ;

[0026] Figure 6 Schematic diagram of the structure of the protection part provided for the embodiments of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the pressure relief part provided for the embodiments of the present invention;

[0028] Figure 8 Schematic diagram of the structure of the connection part provided for the embodiments of the present invention;

[0029] Figure 9 Schematic diagram of the enlarged partial structure A provided for the embodiments of the present invention.

[0030] Description of the reference numerals:

[0031] 100. Outer shell; 110. Housing; 120. Cover plate; 200. Explosion-proof device; 210. Connection part; 211. Fixed ring; 212. Connection ring; 213. First sealing ring; 214. Connection ring; 220. Protection part; 221. Protection cover; 222. Fixed platform; 223. Second channel; 224. Fixed groove; 225. Slide groove; 226. Fixed rod; 227. Locking block; 228. Limit groove; 229. Limit rod; 230. Pressure relief part; 231. Pressure ring; 232. Explosion-proof cover; 234. First inclined surface; 235. Second sealing ring; 236. First channel; 237. Positioning ring; 240. Reset part; 241. Compression spring; 300. Safety cone. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0033] Please refer to Figures 1-9 , a structure of a square internal explosion cell outer shell 100, including an outer shell 100 arranged in a square shape. The outer shell 100 includes a housing 110 and a cover plate 120. An explosion-proof device 200 is arranged on the outer shell 100. The explosion-proof device 200 includes a connection part 210. One end of the connection part 210 is arranged on the outer shell 100, and the other end is connected to a protection part 220. An inner cavity is formed between the connection part 210 and the protection part 220. A pressure relief part 230 is slidably arranged in the inner cavity. A reset part 240 is arranged between the pressure relief part 230 and the protection part 220. The pressure relief part 230 abuts against the connection part 210 under the action of the reset part 240 to seal the outer shell 100.

[0034] The arrangement of the explosion-proof device 200 on the outer shell 100 means that the explosion-proof device 200 can be arranged on the housing 110, or on the cover plate 120, or on both the housing 110 and the cover plate 120 at the same time.

[0035] Further, the connection part 210 includes a fixed ring 211. One end of the fixed ring 211 extends into the outer shell 100 and is threadedly connected to the outer shell 100. A connection ring is fixedly arranged at the other end of the fixed ring 211. The connection ring is connected to the protection part 220. A first sealing ring 213 is arranged between the fixed ring 211 and the outer shell 100.

[0036] Corresponding connection holes are provided on the housing 110 or the cover plate 120. The connection holes communicate the inside and outside of the outer shell 100, and the fixing ring 211 is threadedly connected to the outer shell 100.

[0037] Further, the pressure relief part 230 includes a pressure ring 231 slidably connected to the connection ring. An explosion-proof cover 232 is provided in the middle of the pressure ring 231. A first inclined surface 234 is provided on the inner wall of the connection ring. A second inclined surface adapted to the first inclined surface 234 is provided at the outer end of the pressure ring 231. A second sealing ring 235 is provided on one side of the fixing ring 211 facing the connection ring. Under the action of the reset part 240, the pressure ring 231 is closely attached to the fixing ring 211 to seal the outer shell 100. A first channel 236 for pressure relief is formed between the pressure ring 231 and the first inclined surface 234.

[0038] When the internal pressure of the outer shell 100 increases sharply, the air pressure will cause the pressure ring 231 to move towards the protection part 220, so that the first channel 236 communicates with the inner cavity, thereby discharging the gas inside the outer shell 100. And because the pressure ring 231 is provided with the first inclined surface 234, the greater the pressure, the farther the pressure ring 231 moves, the wider the first channel 236 is, and the greater the gas flow rate discharged per unit is, so as to facilitate the rapid release of the internal pressure; the explosion-proof cover 232 is a microporous film made of polytetrafluoroethylene. When the internal pressure increases sharply and the first channel 236 cannot relieve the pressure quickly, the explosion-proof cover 232 ruptures, so that the middle part of the pressure ring 231 can also complete pressure relief, thereby preventing the battery from exploding.

[0039] Further, a positioning ring 237 is fixedly provided on the inner wall of the pressure ring 231, and the explosion-proof cover 232 is fixedly provided on the positioning ring 237.

[0040] Further, the reset part 240 is a compression spring 241. The compression spring 241 is arranged between the protection cover 221 and the pressure ring 231, and the compression spring 241 is arranged outside the positioning ring 237. A placement groove corresponding to the compression spring 241 can be opened at the top of the protection cover 221 to facilitate restricting the position of the compression spring 241.

[0041] Further, the protection part 220 includes a protection cover 221, which is snap-connected to the fixing ring 211. The fixing ring 211, the connecting ring, and the protection cover 221 together form an inner cavity. A plurality of fixing platforms 222 are fixedly arranged on the outer side of the fixing ring 211. The plurality of fixing platforms 222 are annularly distributed, and a second channel 223 for pressure relief is formed between adjacent fixing platforms 222. Fixing grooves 224 are formed on each of the fixing platforms 222. A plurality of fixing rods 226 corresponding to the positions of the fixing grooves 224 one by one are fixedly arranged inside the protection cover 221, and locking blocks 227 are fixedly arranged at the ends of the fixing rods 226. The second channel 223 is communicated with the inner cavity to discharge the internal gas.

[0042] A sliding groove 225 communicated with the fixing groove 224 is further arranged on the fixing platform 222. The locking block 227 is slidably connected with the sliding groove 225. A limiting rod 229 is further fixedly arranged on the locking block 227. A limiting groove 228 corresponding to the limiting rod 229 is further arranged on the fixing platform 222. The limiting groove 228 is communicated with the fixing groove 224. Both the fixing rod 226 and the limiting rod 229 are made of elastic materials.

[0043] When installing the protection cover 221, align the locking block 227 on the fixing rod 226 on the protection cover 221 with the sliding groove 225. After the fixing rod 226 completely extends into the fixing groove 224, rotate the protection cover 221 so that the limiting rod 229 is engaged in the limiting groove 228. At this time, the locking block 227 is closely attached to the bottom end of the fixing platform 222, thereby locking the protection cover 221 to the fixing ring 211. This structure is simple to install, can be installed without tools, and is convenient for replacing the damaged pressure relief part 230 inside.

[0044] Further, a safety cone 300 is arranged on the side of the protection cover 221 facing the inner cavity, and the top of the safety cone 300 is pointed. When the explosion-proof cover 232 should explode but fails to explode, under the action of the internal high pressure, the explosion-proof cover 232 moves to the safety cone 300, and the safety cone 300 pierces the explosion-proof cover 232, so that the internal gas can pass through the middle of the pressure ring 231, thereby improving the explosion-proof stability of the device. The above only describes some exemplary embodiments of the present invention by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. Structure of a square implosion cell casing, comprising a casing (100) arranged in a square shape, characterized in that: The outer shell (100) includes a housing (110) and a cover plate (120). An explosion-proof device (200) is provided on the outer shell (100). The explosion-proof device (200) includes a connecting portion (210). One end of the connecting portion (210) is disposed on the outer shell (100), and the other end is connected to a protection portion (220). An inner cavity is formed between the connecting portion (210) and the protection portion (220). A pressure relief portion (230) is slidably disposed in the inner cavity. A reset portion (240) is provided between the pressure relief portion (230) and the protection portion (220). The pressure relief portion (230) abuts against the connecting portion (210) under the action of the reset portion (240) to seal the outer shell (100).

2. The structure of a square implosion cell casing according to claim 1, characterized in that, The connecting portion (210) includes a fixing ring (211). One end of the fixing ring (211) extends into the outer shell (100) and is threadedly connected to the outer shell (100). A connecting ring is fixedly provided at the other end of the fixing ring (211). The connecting ring is connected to the protection portion (220). A first sealing ring (213) is provided between the fixing ring (211) and the outer shell (100).

3. The structure of a square implosion cell casing according to claim 2, characterized in that, The pressure relief portion (230) includes a pressure ring (231) slidably connected in the connecting ring. An explosion-proof cover (232) is provided in the middle of the pressure ring (231). A first inclined surface (234) is provided on the inner wall of the connecting ring. A second inclined surface adapted to the first inclined surface (234) is provided at the outer end of the pressure ring (231). A second sealing ring (235) is provided on the side of the fixing ring (211) facing the connecting ring. Under the action of the reset portion (240), the pressure ring (231) closely adheres to the fixing ring (211) to seal the outer shell (100). A first channel (236) for pressure relief is formed between the pressure ring (231) and the first inclined surface (234).

4. The structure of a square implosion cell housing according to claim 3, characterized in that, A positioning ring (237) is fixedly provided on the inner wall of the pressure ring (231). The explosion-proof cover (232) is fixedly provided on the positioning ring (237).

5. The structure of a square implosion cell housing according to claim 4, characterized in that, The reset portion (240) is a compression spring (241). The compression spring (241) is provided between the protection cover (221) and the pressure ring (231), and the compression spring (241) is provided outside the positioning ring (237).

6. The structure of a square implosion cell housing according to claim 2, characterized in that, The protection portion (220) includes a protection cover (221). The protection cover (221) is snap-connected to the fixing ring (211). The fixing ring (211), the connecting ring, and the protection cover (221) together form an inner cavity.

7. The structure of a square implosion cell housing according to claim 6, characterized in that, A plurality of fixing platforms (222) are fixedly provided on the outer side of the fixing ring (211). The plurality of fixing platforms (222) are annularly distributed. A second channel (223) for pressure relief is formed between adjacent fixing platforms (222). Fixing grooves (224) are formed on each of the fixing platforms (222). A plurality of fixing rods (226) corresponding to the positions of the fixing grooves (224) are fixedly provided in the protection cover (221). A locking block (227) is fixedly provided at the end of the fixing rod (226).

8. The structure of a square implosion cell housing according to claim 7, wherein The fixed table (222) is further provided with a sliding groove (225) communicating with the fixed groove (224). The locking block (227) is slidably connected to the sliding groove (225). A limiting rod (229) is fixedly arranged on the locking block (227). The fixed table (222) is further provided with a limiting groove (228) corresponding to the limiting rod (229). The limiting groove (228) communicates with the fixed groove (224).

9. The structure of a square implosion cell housing according to claim 8, characterized in that, Both the fixed rod (226) and the limiting rod (229) are made of elastic materials.

10. The structure of a square implosion cell casing according to claim 6, characterized in that, One side of the protective cover (221) facing the inner cavity is provided with a safety cone (300). The top of the safety cone (300) is pointed.

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