CN213845441U

CN213845441U - Cylindrical battery cap assembly

Info

Publication number: CN213845441U
Application number: CN202022976355.8U
Authority: CN
Inventors: 黄百胜
Original assignee: Huizhou Yulong Battery Fittings Co ltd
Current assignee: Huizhou Yulong Battery Fittings Co ltd
Priority date: 2020-12-12
Filing date: 2020-12-12
Publication date: 2021-07-30
Anticipated expiration: 2030-12-12

Abstract

The utility model discloses a cylindrical battery cap subassembly, which comprises an outer shell, the top threaded connection of shell has the end cover, the below of end cover is provided with the crown, the both ends of crown are provided with the opening, the inside of end cover is provided with first recess, and the opening link up with first recess mutually, the top both ends of end cover just correspond first groove and be provided with the vent, the top both ends of end cover and the top that corresponds the vent are provided with the separation blade, the one end fixedly connected with elastic metal piece of separation blade, and elastic metal piece and end cover fixed connection. The utility model discloses in, when the inside production gas of battery is gradual to increase for explosion-proof piece breaks from the second recess, makes in gaseous process bleeder vent gets into first recess from the opening on the crown again, and makes the elastic metal piece kickup under the effect of atmospheric pressure, thereby makes gaseous through the vent discharge, realizes lithium cell short circuit outage automatic protection.

Description

Cylindrical battery cap assembly

Technical Field

The utility model relates to a battery technology field especially relates to a cylindrical battery cap subassembly.

Background

The lithium battery is a battery which uses lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, and the lithium battery is increasingly widely applied due to the advantages of high specific energy, large specific power, long cycle life and no toxic substances;

when the internal voltage of the existing lithium battery is too large, the temperature in the battery can rise, and the gas is increased, so that the pressure in the battery is increased, and the problem of lithium battery explosion occurs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a cylindrical battery cap component.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a cylindrical battery cover cap subassembly, includes the shell, the top threaded connection of shell has the end cover, the below of end cover is provided with the crown, the both ends of crown are provided with the opening, the inside of end cover is provided with first recess, and the opening link up with first recess mutually, the top both ends of end cover just correspond first groove and be provided with the vent, the top both ends of end cover just correspond the top of vent and be provided with the separation blade, the one end fixedly connected with elastic metal piece of separation blade, and elastic metal piece and end cover fixed connection.

As a further description of the above technical solution:

the bottom of the end cover is in contact with the crown, and the central bulge of the crown penetrates through the end cover and extends to the outside.

As a further description of the above technical solution:

and a damping rubber ring is arranged at the bottom of the cap top.

As a further description of the above technical solution:

an explosion-proof sheet is arranged below the damping rubber ring, and a second groove is formed in the upper concave position of the explosion-proof sheet.

As a further description of the above technical solution:

an aluminum sheet is arranged below the explosion-proof sheet, and a plurality of ventilation holes are formed in the center of the bottom of the aluminum sheet.

As a further description of the above technical solution:

the aluminum sheet's below is provided with the sealing washer, the below of sealing washer is provided with the spacing ring, and spacing ring and shell fixed connection.

The utility model discloses following beneficial effect has:

this cylindrical battery cap subassembly, through the explosion-proof piece that sets up, the second recess, the bleeder vent, the opening, the second recess, elastic metal piece and vent, when the inside production gas of battery is gradual increase, make the explosion-proof piece follow the fracture of second recess, make in gaseous process bleeder vent gets into first recess from the opening on the crown again, and make elastic metal piece kickup under the effect of atmospheric pressure, thereby make gaseous through the vent discharge, realize lithium cell short circuit outage automatic protection.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the elastic metal sheet and the ventilation opening of the present invention;

fig. 3 is a schematic view of the structure a of the present invention.

Illustration of the drawings:

1. a housing; 2. an end cap; 3. a crown; 4. an opening; 5. a first groove; 6. a vent; 7. a baffle plate; 8. a resilient metal sheet; 9. a damping rubber ring; 10. an explosion-proof sheet; 11. a second groove; 12. aluminum sheets; 13. air holes are formed; 14. a seal ring; 15. a limit ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides an embodiment: a cylindrical battery cap component comprises a shell 1, wherein the top of the shell 1 is in threaded connection with an end cover 2, a cap top 3 is arranged below the end cover 2, openings 4 are arranged at two ends of the cap top 3, a first groove 5 is arranged inside the end cover 2, the openings 4 are communicated with the first groove 5, ventilation openings 6 are arranged at two ends of the top of the end cover 2 and correspond to the first groove 5, blocking pieces 7 are arranged at two ends of the top of the end cover 2 and correspond to the upper portions of the ventilation openings 6, one end of each blocking piece 7 is fixedly connected with an elastic metal sheet 8, the elastic metal sheets 8 are fixedly connected with the end cover 2, when the internal voltage of an assembled lithium battery is overlarge, the temperature in the battery rises, gas increases, the pressure in the battery increases, at the moment, an explosion-proof sheet 10 can be broken from the second groove 11, and the gas enters the first groove 5 from the opening 4 on the cap top 3 through a vent hole 13, and make elastic metal sheet 8 bend upwards under the effect of atmospheric pressure to make gas discharge through vent 6, avoid the lithium cell explosion, and elastic metal sheet 8 makes separation blade 7 be located the top of vent 6 under the state of not receiving external force, can prevent that the dust from getting into inside shell 1.

The bottom of the end cap 2 is in contact with the crown 3, and the central protrusion of the crown 3 penetrates the end cap 2 and extends to the outside.

The bottom of the crown 3 is provided with a damping rubber ring 9, so that the impact force of the battery from the outside can be relieved.

An explosion-proof sheet 10 is arranged below the damping rubber ring 9, and a second groove 11 is arranged at the upper concave position of the explosion-proof sheet 10.

An aluminum sheet 12 is arranged below the explosion-proof sheet 10, and a plurality of air holes 13 are arranged at the center of the bottom of the aluminum sheet 12.

The sealing ring 14 is arranged below the aluminum sheet 12, the limiting ring 15 is arranged below the sealing ring 14, the limiting ring 15 is fixedly connected with the shell 1, and the sealing ring 14 can prevent electrolyte in the lithium battery from flowing out when the explosion-proof sheet 10 is damaged and deformed.

The working principle is as follows: when the cylindrical battery cap component is used, a person can put the sealing ring 14, the aluminum sheet 12, the explosion-proof sheet 10, the damping rubber ring 9 and the cap top 3 into the shell 1 in sequence, weld the aluminum sheet 12 and the explosion-proof sheet 10 together, screw the final end cover 2 into the shell 1 to prevent internal parts from separating from the shell 1, when the internal voltage of the assembled lithium battery is too high, the temperature in the battery can rise, gas can increase, the pressure in the battery can increase, at the moment, the explosion-proof sheet 10 can break from the second groove 11, so that the gas can enter the first groove 5 from the opening 4 on the cap top 3 through the vent hole 13, and the elastic metal sheet 8 bends upwards under the action of air pressure, so that the gas can be discharged through the vent hole 6 to avoid explosion of the lithium battery, and the baffle 7 is positioned above the vent hole 6 under the state that the elastic metal sheet 8 is not subjected to external force, thereby preventing dust from entering the shell 1, meanwhile, when the explosion-proof sheet 10 is damaged and deformed, the electrolyte in the lithium battery is prevented from flowing out through the sealing ring 14.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A cylindrical battery cap assembly comprising a housing (1), characterized in that: the top threaded connection of shell (1) has end cover (2), the below of end cover (2) is provided with crown (3), the both ends of crown (3) are provided with opening (4), the inside of end cover (2) is provided with first recess (5), and opening (4) link up with first recess (5) mutually, the top both ends of end cover (2) just correspond first recess (5) department and be provided with vent (6), the top both ends of end cover (2) just correspond the top of vent (6) and be provided with separation blade (7), the one end fixedly connected with elasticity sheetmetal (8) of separation blade (7), and elasticity sheetmetal (8) and end cover (2) fixed connection.

2. The cylindrical battery cap assembly of claim 1, wherein: the bottom of the end cover (2) is in contact with the crown (3), and the central bulge of the crown (3) penetrates through the end cover (2) and extends to the outside.

3. The cylindrical battery cap assembly of claim 1, wherein: and a damping rubber ring (9) is arranged at the bottom of the crown (3).

4. A cylindrical battery cap assembly according to claim 3, wherein: an explosion-proof sheet (10) is arranged below the damping rubber ring (9), and a second groove (11) is arranged in an upper concave position of the explosion-proof sheet (10).

5. The cylindrical battery cap assembly of claim 4, wherein: an aluminum sheet (12) is arranged below the explosion-proof sheet (10), and a plurality of air holes (13) are formed in the center of the bottom of the aluminum sheet (12).

6. The cylindrical battery cap assembly of claim 5, wherein: the aluminum sheet (12) is provided with the sealing washer (14) in the below, the below of sealing washer (14) is provided with spacing ring (15), and spacing ring (15) and shell (1) fixed connection.