CN212571160U

CN212571160U - High security battery top cap structure

Info

Publication number: CN212571160U
Application number: CN202021839628.8U
Authority: CN
Inventors: 励建炬
Original assignee: Huizhou Kdl Precision Industry Co ltd
Current assignee: Huizhou Kdl Precision Industry Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-02-19
Anticipated expiration: 2030-08-28

Abstract

The utility model relates to a high security battery top cap structure, including top cap body, anodal conducting strip and negative pole conducting strip set firmly the top cap body, the one end of negative pole conducting strip outwards extends and forms protruding edge, the below on protruding edge is equipped with the upset piece, the upset piece includes contact and hot bimetallic strip, hot bimetallic strip locates the both sides of contact, the initiative layer orientation of hot bimetallic strip the negative pole conducting strip. The utility model discloses a dual monitoring of atmospheric pressure and temperature can be realized to the upset piece, effectively improves the security performance of battery.

Description

High security battery top cap structure

Technical Field

The utility model relates to a power battery field particularly, relates to a high security battery top cap structure.

Background

In the prior art, when the power battery is overcharged, the decomposition of the electrolyte in the power battery can cause the power battery to generate excessive heat to cause the battery to ignite, or can cause the internal pressure of the power battery to increase to cause the battery to explode. Therefore, before the power battery is out of control, an external short circuit structure is needed to cut off a fuse structure in a main loop of the power battery, so that the power battery is prevented from being charged continuously.

The prior art generally arranges an overturning sheet at the end of the battery cathode column, which is positioned below the cathode conducting sheet and keeps a certain distance. The battery is at normal condition, and upset piece and negative pole conducting strip are contactless, and when the battery was in the use, the inside short circuit appeared, when producing a large amount of atmospheric pressures, the upset piece upwards protruding in the specified pressure value, and the upset piece is connected with the negative pole conducting strip to at the inside return circuit that forms of battery, the electric current in major loop increases in the twinkling of an eye, makes the fuse fusing, cuts off the major loop, protects power battery, avoids the explosion on fire of battery.

However, the existing turnover piece structure can only realize protection through air pressure, and in the actual use process of the power battery, overheating can occur in the battery, but the air is not released due to the battery structure, or the air pressure is slowly increased, so that the turnover piece cannot timely trigger the fuse to be fused, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high security battery top cap structure, its upset piece can realize the dual monitoring of atmospheric pressure and temperature, effectively improves the security performance of battery.

The utility model provides a high security battery top cap structure, includes top cap body, anodal conducting strip and negative pole conducting strip set firmly the top cap body, the one end of negative pole conducting strip outwards extends and forms protruding edge, the below on protruding edge is equipped with the upset piece, the upset piece includes contact and hot bimetallic strip, hot bimetallic strip is located the both sides of contact, the initiative layer orientation of hot bimetallic strip the negative pole conducting strip.

Furthermore, the heat conduction device also comprises a heat conduction piece, one end of the thermal bimetallic strip is welded with the contact body, the other end of the thermal bimetallic strip is welded with the heat conduction piece, and the heat conduction piece extends downwards to the lower end face of the top cover body.

Furthermore, the lower end of the heat conducting piece is provided with a heat conducting plane.

Further, the heat conducting member is made of heat conducting metal.

Further, a gap is formed between the contact body and the convex edge.

Further, the surface of the thermal bimetallic strip is covered with a copper foil.

Compared with the prior art, the beneficial effects of the utility model are that: set up the upset piece in the below of negative pole conducting strip, and the both ends of upset piece are equipped with hot bimetallic strip, and under general condition, hot bimetallic strip does not influence the upset piece, and the upset piece still accessible battery inside atmospheric pressure realizes the upset promptly and contacts with the negative pole conducting strip. When the battery is internally overheated, and air pressure does not reach the preset value, the battery has the danger of explosion on fire, and the thermal bimetallic strip takes place deformation this moment, drives the upset piece and contacts with the negative pole conducting strip for fuse fusing cuts off the major loop, protects power battery, avoids the explosion on fire of battery. The thermal bimetallic strip is connected with the heat conducting piece, and the heat conducting piece extends to the inside of the battery, so that the temperature inside the battery can be quickly sensed, and the reaction of the turnover sheet is more timely and accurate. The utility model discloses can realize the dual control of atmospheric pressure and temperature, effectively improve the security performance of battery.

Drawings

Fig. 1 is a schematic structural diagram of the top cap structure of the high-safety battery of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 and fig. 2, in a preferred embodiment, the high-safety battery top cap structure of the present invention mainly includes a top cap body 1, a positive conductive sheet 2, and a negative conductive sheet 3. The positive conducting plate 2 and the negative conducting plate 3 are both made of conducting metal and are fixedly arranged on the top cover body 1.

One end of the negative conducting plate 3 extends outwards to form a convex edge 4, and an overturning plate 5 is arranged below the convex edge 4. Specifically, the turning sheet 5 includes a contact 6 and a thermal bimetallic strip 7, a gap is formed between the contact 6 and the convex edge 4, the thermal bimetallic strip 7 is arranged on two sides of the contact 6, and the active layer of the thermal bimetallic strip 7 faces the negative conductive sheet 3.

In general, the thermal bimetal 7 has no influence on the contact body 6, i.e. the turning piece 5 can still be turned over by the internal air pressure of the battery and is in contact with the negative conductive piece 3. When the battery is inside overheated, and atmospheric pressure does not reach the default, the battery has the danger of the explosion on fire this moment, reaches a definite value when the temperature, and hot bimetallic strip 7 takes place the bending, and drive upset piece 5 and negative pole conducting strip 3 contact for the fuse fuses, cuts off the major loop, and protection power battery avoids the explosion on fire of battery.

The both ends of upset piece 5 are equipped with heat conduction piece 8, and the one end of hot bimetallic strip 7 welds with contact 6, and the other end welds with heat conduction piece 8, and heat conduction piece 8 downwardly extending to the lower terminal surface of top cap body 1, the inside of battery promptly, and heat conduction piece 8 adopts heat conduction metal to make, and in this embodiment, heat conduction piece 8 preferably adopts copper to make. The lower extreme of heat-conducting piece 8 is equipped with heat conduction plane 9, and this heat conduction plane 9 multiplicable heat-conducting piece 8 and the inside area of contact of battery improve the heat conduction efficiency of heat-conducting piece 8 to improve the sensitivity of upset piece 5. The heat conducting piece 8 stretches into the inside of the battery, and can quickly transfer heat inside the battery to the thermal bimetallic strip 7, so that the reaction of the thermal bimetallic strip 7 is quicker and more accurate, and the turnover piece 5 can cut off a circuit in time to protect the battery.

In the description of the present invention, it is to be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The utility model provides a high security battery top cap structure, includes top cap body, anodal conducting strip and negative pole conducting strip set firmly top cap body, its characterized in that, the one end of negative pole conducting strip outwards extends and forms protruding edge, the below on protruding edge is equipped with the upset piece, the upset piece includes contact and hot bimetallic strip, hot bimetallic strip is located the both sides of contact, the initiative layer orientation of hot bimetallic strip the negative pole conducting strip.

2. The high-safety battery top cover structure according to claim 1, further comprising a heat conductive member, wherein one end of the thermal bimetal is welded to the contact body, and the other end of the thermal bimetal is welded to the heat conductive member, and the heat conductive member extends downward to a lower end surface of the top cover body.

3. The high-safety battery top cover structure according to claim 2, wherein the lower end of the heat conductive member is provided with a heat conductive plane.

4. The high-safety battery top cover structure according to claim 3, wherein the heat conductive member is made of a heat conductive metal.

5. The high safety battery top cap structure of claim 1, wherein there is a gap between the contact and the ledge.

6. The high-safety battery top cover structure according to claim 1, wherein a surface of the thermal bimetal is covered with a copper foil.