CN213212242U

CN213212242U - Battery cap and battery

Info

Publication number: CN213212242U
Application number: CN202022225547.5U
Authority: CN
Inventors: 王守军; 韦力群; 梁德声; 徐福娟
Original assignee: SHENZHEN EPT BATTERY CO Ltd
Current assignee: SHENZHEN EPT BATTERY CO Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-05-14
Anticipated expiration: 2030-10-09

Abstract

The utility model discloses a battery cover cap and battery, wherein, the battery cover cap is including fixed upper cover and the casing that the lower cover formed together, install explosion-proof piece, sealing washer in the casing, locate the bulge loop in the sealing washer one end, the casing is followed the sealing washer other end is impressed the sealing washer with the terminal surface of bulge loop compress tightly and with the inner wall tight fit of sealing washer. Compared with the prior art, the utility model provides a battery block and battery, simple structure, convenient assembling, production efficiency is higher.

Description

Battery cap and battery

Technical Field

The utility model relates to a battery technology field, more specifically say, relate to a battery block and battery.

Background

With the development of society and the continuous progress of science and technology, various electronic products come into production, and batteries are widely applied to various electronic products as necessary auxiliary devices of the electronic products.

In the prior art, a battery cap of a nickel-metal hydride battery generally comprises a shell and an explosion-proof sheet arranged in the shell, and is used for sealing an opening end of the battery shell and serving as a battery positive electrode. The existing battery cap is generally complex in structure and low in production efficiency, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery block and battery to the structure that exists is complicated among the solution prior art, problem that production efficiency is not high.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a battery cap, includes the casing that fixed upper cover and lower cover formed together, installs explosion-proof piece, sealing washer in the casing, locate the bulge loop in the sealing washer one end, the casing is followed the sealing washer other end is impressed the sealing washer with the terminal surface of bulge loop compresses tightly and with the inner wall tight fit of sealing washer.

As a further improvement of the present invention, the housing further has a laminated portion between the protruding rings, and an overcurrent protection sheet is disposed on the protruding rings.

As the preferred scheme of the utility model, the overcurrent protection piece is a thermistor.

As the utility model discloses a preferred scheme, it is protruding to be equipped with at least round on the inner wall of sealing washer, the cross section of casing is circular, the outer wall of casing with protruding tight fit.

As the preferred scheme of the utility model, the upper cover with be equipped with the recess on the contact surface of lower cover, the explosion-proof piece is fixed tight fit in the recess.

As the utility model discloses a preferred scheme, upper cover and lower cover adopt metal material to make, upper cover and lower cover adopt spot welding fixed connection.

As the preferred scheme of the utility model, the explosion-proof piece adopts the rubber materials that graphite alkene, ethylene, propylene and non-conjugated alkadiene copolymerization become to make.

As the preferred proposal of the utility model, the upper cover is provided with at least one vent hole.

Additionally, the utility model also provides a battery, this battery includes foretell battery block.

The utility model has the advantages that:

compared with the prior art, the utility model provides a battery block and battery, simple structure, convenient assembling, production efficiency is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an exploded schematic view of the present invention.

Fig. 2 is a front view of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As shown in fig. 1 and 2, in an embodiment of the present invention, a battery cap is provided, which comprises a casing formed by an upper cover 1 and a lower cover 3 fixed together, an explosion-proof sheet 2 installed in the casing, a sealing ring 5, and a convex ring 51 installed in one end of the sealing ring 5, wherein during installation, the casing is pressed into the inner hole of the sealing ring 5 from the other end of the sealing ring 5, and is tightly pressed with the end face of the convex ring 51 and tightly fitted with the inner wall of the sealing ring 5.

As a further improvement of the present invention, an overcurrent protection sheet 4 attached to the protruding ring 51 is further provided between the housing and the protruding ring 51.

Preferably, the overcurrent protection sheet 4 is a thermistor. The thermistor is of an annular bimetallic strip structure. When the current is overlarge due to the external short circuit of the battery, the thermistor plays a role in impedance, so that the current is reduced to the current within a safety range, and the function of protecting the battery is achieved.

The battery cap of this application has explosion-proof piece 2 and overcurrent protection piece 4 simultaneously, can play the duplicate protection effect to the battery.

In order to ensure that the shell and the sealing ring 5 are matched more tightly, firmly and reliably, at least one circle of bulges 52 are arranged on the inner wall of the sealing ring 5, the cross section of the shell is circular, and the outer wall of the shell is tightly matched with the bulges 52.

Preferably, the contact surface of upper cover 1 and lower cover 3 is equipped with the recess, and explosion-proof piece 2 is fixed tight fit in the recess, prevents that explosion-proof piece 2 from loosening.

Preferably, the upper cover 1 and the lower cover 3 are made of metal materials, and the upper cover 1 and the lower cover 3 are fixedly connected by spot welding.

Preferably, the explosion-proof sheet 2 is made of a rubber material copolymerized by graphene, ethylene, propylene and non-conjugated diene. Have high temperature resistant, low temperature resistant, fire-resistant, oxidation resistance, acid and alkali-resistance, vapor resistance, tensile strength is strong, non-deformable, can keep fine compliance under high, the low temperature, because contain graphite alkene make explosion-proof piece 2 have good heat conductivity, make battery block heat conduction quicker, the heat dissipation is faster, the explosion-proof piece as the battery block plays high safe relief valve effect.

In the explosion-proof sheet 2, the mass percentages of graphene, ethylene, propylene and non-conjugated diene are 5: 45: 40: 10.

preferably, the upper cover 1 is provided with at least one vent hole 13. The vent holes 13 may be circular, square or other suitable shape as desired. When the battery is in an external short circuit condition, a large amount of gas can be rapidly generated in the battery, and the method for relieving the explosion risk generally comprises the step of discharging the gas from the vent hole by means of the opening pressure of the safety valve of the explosion-proof sheet, so that the purpose of ensuring that the battery eliminates the explosion risk and protecting the battery from performance reduction caused by the short circuit is achieved, and the service life of the battery is prolonged.

The upper cover 1 comprises an upper cover body 11 and a convex edge 12 arranged at one end of the upper cover body and extending outwards, and the outer diameter of the convex edge 12 is consistent with that of the lower cover 3.

The above embodiments and drawings are only for illustrating the technical solutions of the present invention and do not constitute limitations of the present invention. It should be noted that, a person skilled in the art may modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for part or all of the technical features, and such modifications or substitutions are included in the scope of the present invention as claimed in the claims.

Claims

1. A battery cap, characterized in that: the explosion-proof sealing device comprises a shell, an explosion-proof sheet, a sealing ring and a convex ring, wherein the shell is formed by an upper cover and a lower cover which are fixed together, the explosion-proof sheet is arranged in the shell, the convex ring is arranged in one end of the sealing ring, and the shell is pressed in from the other end of the sealing ring, the sealing ring is tightly pressed with the end face of the convex ring and is tightly matched with the inner wall of the sealing ring.

2. A battery cap in accordance with claim 1, wherein: an overflowing protection sheet attached to the convex ring is further arranged between the shell and the convex ring.

3. The battery cap of claim 2, wherein: the overcurrent protection sheet is a thermistor.

4. A battery cap in accordance with claim 1, wherein: the inner wall of the sealing ring is provided with at least one circle of bulges, the cross section of the shell is circular, and the outer wall of the shell is tightly matched with the bulges.

5. A battery cap in accordance with claim 1, wherein: the contact surface of the upper cover and the lower cover is provided with a groove, and the explosion-proof sheet is fixed in the groove in a tight fit manner.

6. A battery cap in accordance with claim 1, wherein: the upper cover and the lower cover are fixedly connected by spot welding.

7. A battery cap in accordance with claim 1, wherein: the upper cover is provided with at least one vent hole.

8. A battery, characterized by: the battery includes the battery cap of any one of claims 1 to 7.