CN212571166U

CN212571166U - Wire-welding safety combined cap

Info

Publication number: CN212571166U
Application number: CN202021155347.0U
Authority: CN
Inventors: 张涵
Original assignee: Xinxiang Tianguan Electronics Co ltd
Current assignee: Xinxiang Tianguan Electronics Co ltd
Priority date: 2020-06-21
Filing date: 2020-06-21
Publication date: 2021-02-19
Anticipated expiration: 2030-06-21

Abstract

The utility model discloses a wire welding safety combined cap, which comprises a connecting ring and a buffer unit; connecting rings: the end part of the bottom side of the connecting ring is provided with a shell, the connecting ring is fixedly connected with the shell, the top of the connecting ring is provided with a top cover, the connecting ring is sleeved with the top cover, the bottom of the top cover is provided with limiting plates in an array at equal intervals, and the top cover is fixedly connected with the limiting plates; a buffer unit: contain annular explosion-proof piece, annular joint board and buffer spring, annular joint board is located the inboard bottom of go-between, the ring channel fixed connection that annular joint board and go-between bottom were seted up, annular explosion-proof piece is located the inboard of go-between, and is located the top of annular joint board, buffer spring equidistance array distribution is between annular joint board and annular explosion-proof piece, and this wire bonding safety combination block not only has buffer function, and security stability is better moreover.

Description

Wire-welding safety combined cap

Technical Field

The utility model relates to a lithium cell technical field specifically is a wire bonding safety combination block.

Background

The appearance of batteries provides the necessary power supply guarantee for our human life, entertainment and work. With the development of society and the improvement of human civilization, the primary battery is gradually eliminated due to the defects of environmental pollution, low capacity, short service life and the like, and is replaced by a secondary battery with the advantages of no pollution, large capacity, long service life and the like, wherein the cylindrical lithium battery has the specific structure and performance and is widely applied to various fields;

the safety combined cap is the most important safety guarantee part of the cylindrical lithium battery, and the structure and the production process of the safety combined cap directly or indirectly influence the performance of the lithium battery and the safety problem caused by high-power instantaneous or long-time discharge;

the existing safety combined cap generally uses the top cover and the explosion-proof piece, but the top cover and the explosion-proof piece are mostly welded together, and when the safety combined cap is used and the top cover is under external pressure, the top cover is easy to break and fall off from the explosion-proof piece, so that the battery is scrapped.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a wire bonding safety combination block, have buffer function, and security stability is better, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a wire-welding safety combined cap comprises a connecting ring and a buffer unit;

connecting rings: the end part of the bottom side of the connecting ring is provided with a shell, the connecting ring is fixedly connected with the shell, the top of the connecting ring is provided with a top cover, the connecting ring is sleeved with the top cover, the bottom of the top cover is provided with limiting plates in an array at equal intervals, and the top cover is fixedly connected with the limiting plates;

a buffer unit: contain annular explosion-proof piece, annular joint board and buffer spring, annular joint board is located the inboard bottom of go-between, the ring channel fixed connection that annular joint board and go-between bottom were seted up, annular explosion-proof piece is located the inboard of go-between, and is located the top of annular joint board, buffer spring equidistance array distribution is between annular joint board and annular explosion-proof piece, annular explosion-proof piece passes through buffer spring and annular joint board fixed connection.

Furthermore, the heat dissipation device also comprises heat dissipation holes which are arranged in the middle of the top cover in an array mode at equal intervals. Through the setting of louvre, dispel the heat to battery inside.

Further, still include the PTC ring, the PTC ring is located the inside of go-between, the PTC ring is located between top cap and the annular explosion-proof piece, and the bottom fixed connection of PTC ring and top cap. Through the arrangement of the PTC ring, when a certain temperature is reached, the internal structure of the battery is changed, the resistance is greatly increased, the purpose of preventing the battery from discharging is achieved, and the battery protection device has the function of protecting the battery when the external short circuit of the battery occurs.

Furthermore, the diameter of the PTC ring is smaller than that of the annular explosion-proof sheet, and the aperture of the middle part of the PTC ring is equal to that of the middle part of the annular explosion-proof sheet. The diameter of the PTC ring is smaller than that of the annular explosion-proof sheet, so that the annular explosion-proof sheet can be connected with the top cover, and the aperture of the middle part of the annular explosion-proof sheet is equal to that of the middle part of the PTC ring, so that substances in the battery can be sprayed out when the internal pressure of the battery is too high.

Furthermore, the top of the annular explosion-proof sheet is fixedly connected with a limiting plate at the bottom of the top cover. Through being connected of annular explosion-proof piece and top cap, make the top cap have certain buffering effect.

Compared with the prior art, the beneficial effects of the utility model are that: this wire bonding safety combination block has following benefit:

1. the wire welding safety combined cover cap is provided with the buffer unit, when the top cover is subjected to external pressure, the pressure is transmitted to the buffer spring at the bottom of the annular explosion-proof sheet through the connection of the annular explosion-proof sheet and the top cover, and the pressure is transmitted to the periphery through the matching of the annular clamping plate and the connecting ring, so that the top cover and the annular explosion-proof sheet are protected from being separated easily;

2. the heat dissipation is carried out through the heat dissipation holes in the top cover, when the temperature reaches an overheating out-of-control state, the internal pressure of the battery continues to rise, the annular explosion-proof sheet is broken, substances in the battery are sprayed out along with high pressure, through the arrangement of the PTC ring, when the temperature reaches a certain temperature, the internal structure of the battery is changed, the resistance is greatly increased, the purpose of preventing the battery from discharging is achieved, and the function of protecting the battery when the external short circuit of the battery is achieved;

3. the wire-bonding safety combined cap not only has a buffering function, but also has better safety and stability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a partial structure of the present invention;

FIG. 3 is a schematic view of the local bottom view structure of the present invention;

FIG. 4 is a schematic view of the present invention in a partial cross-sectional view;

fig. 5 is a schematic view of the local exploded structure of the present invention.

In the figure: the device comprises a shell 1, a connecting ring 2, a top cover 3, heat dissipation holes 4, a buffer unit 5, an annular explosion-proof plate 51, an annular clamping plate 52, a buffer spring 53, an annular groove 6, a limiting plate 7 and a PTC ring 8.

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.

Referring to fig. 1-5, the present invention provides a technical solution: a wire-welding safety combined cap comprises a connecting ring 2 and a buffer unit 5;

and a connecting ring 2: the end part of the bottom side of the shell is provided with a shell 1, a connecting ring 2 is fixedly connected with the shell 1, the top of the connecting ring 2 is provided with a top cover 3, the connecting ring 2 is sleeved with the top cover 3, the bottom of the top cover 3 is provided with limiting plates 7 in an array at equal intervals, and the top cover 3 is fixedly connected with the limiting plates 7; the heat dissipation device further comprises heat dissipation holes 4, wherein the heat dissipation holes 4 are arranged in the middle of the top cover 3 in an array mode at equal intervals. Through the setting of louvre 4, dispel the heat to the battery inside. The explosion-proof cover further comprises a PTC ring 8, the PTC ring 8 is located inside the connecting ring 2, the PTC ring 8 is located between the top cover 3 and the annular explosion-proof sheet 51, and the PTC ring is fixedly connected with the bottom of the top cover 3. Through the arrangement of the PTC ring 8, when a certain temperature is reached, the internal structure of the battery is changed, the resistance is greatly increased, the purpose of preventing the battery from discharging is achieved, and the battery protection device has the function of protecting the battery when the external short circuit of the battery occurs. The diameter of the PTC ring 8 is smaller than that of the annular explosion-proof sheet 51, and the middle hole diameter of the PTC ring 8 is equal to that of the middle of the annular explosion-proof sheet 51. The diameter of the PTC ring 8 is smaller than that of the annular explosion-proof sheet 51, so that the annular explosion-proof sheet 51 can be connected with the top cover 3, and the aperture of the middle part of the PTC ring 8 is equal to that of the middle part of the annular explosion-proof sheet 51, so that substances in the battery can be sprayed out when the internal pressure of the battery is too high;

the buffer unit 5: contain annular explosion-proof plate 51, annular joint plate 52 and buffer spring 53, annular joint plate 52 is located the inboard bottom of go-between 2, 6 fixed connection of the ring channel that annular joint plate 52 and go-between 2 bottoms were seted up, annular explosion-proof plate 51 is located the inboard of go-between 2, and is located annular joint plate 52's top, buffer spring 53 equidistance array distributes between annular joint plate 52 and annular explosion-proof plate 51, annular explosion-proof plate 51 passes through buffer spring 53 and annular joint plate 52 fixed connection. The top of the ring-shaped explosion-proof sheet 51 is fixedly connected with the limiting plate 7 at the bottom of the top cover 3. The top cover 3 has a certain buffering effect through the connection of the annular explosion-proof sheet 51 and the top cover 3.

When in use: firstly, the top cover 3 is sleeved on the inner side of the connecting ring 2, the top cover 3 is not easy to fall off through the limiting plate 7 arranged at the bottom of the top cover 3, the pressure is transmitted to the buffer spring 53 at the bottom of the annular explosion-proof sheet 51 through the connection of the annular explosion-proof sheet 51 and the top cover 3, when the top cover 3 is under external pressure, the pressure is transmitted to the periphery through the matching of the annular clamping plate 52 and the connecting ring 2, so that the top cover 3 and the annular explosion-proof sheet 51 are not easy to separate, when the battery is overcharged, because the battery cap has an overcharge protection function, when the overcharge reaches a certain degree, the charging is forced to be stopped, at this time, if the internal temperature of the battery is too high, the heat is radiated through the heat radiation hole 4 on the top cover 3, when the temperature reaches an overheat out-of-control state, the internal pressure of the battery continues to rise, the annular explosion, through the arrangement of the PTC ring 8, when a certain temperature is reached, the internal structure of the battery is changed, the resistance is greatly increased, the purpose of preventing the battery from discharging is achieved, and the battery protection device has the function of protecting the battery when the external short circuit of the battery occurs.

It should be noted that in this embodiment, the material of the housing 1 and the connection ring 2 is titanium alloy, and the outer sides of the housing 1 and the connection ring 2 are wrapped with insulating material.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a wire bonding safety combined cover cap which characterized in that: comprises a connecting ring (2) and a buffer unit (5);

connecting ring (2): the shell (1) is arranged at the end part of the bottom side of the shell, the connecting ring (2) is fixedly connected with the shell (1), the top of the connecting ring (2) is provided with the top cover (3), the connecting ring (2) is sleeved with the top cover (3), the bottom of the top cover (3) is provided with limiting plates (7) in an array mode at equal intervals, and the top cover (3) is fixedly connected with the limiting plates (7);

buffer unit (5): contain annular explosion-proof piece (51), annular joint board (52) and buffer spring (53), annular joint board (52) are located the inboard bottom of go-between (2), annular ring channel (6) fixed connection that annular joint board (52) and go-between (2) bottom were seted up, annular explosion-proof piece (51) are located the inboard of go-between (2), and are located the top of annular joint board (52), buffer spring (53) equidistance array distributes between annular joint board (52) and annular explosion-proof piece (51), annular explosion-proof piece (51) are through buffer spring (53) and annular joint board (52) fixed connection.

2. A wire bonding safety combination cap as claimed in claim 1, wherein: the heat dissipation device is characterized by further comprising heat dissipation holes (4), wherein the heat dissipation holes (4) are arranged in the middle of the top cover (3) in an array mode at equal intervals.

3. A wire bonding safety combination cap as claimed in claim 1, wherein: still include PTC ring (8), PTC ring (8) are located the inside of go-between (2), PTC ring (8) are located between top cap (3) and annular rupture disk (51), and the bottom fixed connection of PTC ring and top cap (3).

4. A wire bonding safety combination cap as claimed in claim 3, wherein: the diameter of the PTC ring (8) is smaller than that of the annular explosion-proof sheet (51), and the aperture of the middle part of the PTC ring (8) is equal to that of the middle part of the annular explosion-proof sheet (51).

5. A wire bonding safety combination cap as claimed in claim 1, wherein: the top of the annular explosion-proof sheet (51) is fixedly connected with a limiting plate (7) at the bottom of the top cover (3).