CN205303567U

CN205303567U - Lithium cell blast resistant construction

Info

Publication number: CN205303567U
Application number: CN201521003705.5U
Authority: CN
Inventors: 黄文弘
Original assignee: Dongguan Qiao Steps On Energy-Conservation Science And Technology Ltd
Current assignee: Dongguan Qiao Steps On Energy-Conservation Science And Technology Ltd
Priority date: 2015-12-04
Filing date: 2015-12-04
Publication date: 2016-06-08
Anticipated expiration: 2025-12-04

Abstract

The utility model provides a lithium cell blast resistant construction, locates on the roof on a lithium cell core casing top, wherein, this roof has one of upper and lower intercommunication and accepts a region and an air vent, should accept regional top surface undercut by this roof, should accept the region and have an annular bottom surface, and this annular bottom surface is located the top periphery of this air vent, a rubber ring holding is in this accepts the region to be located the top of this annular bottom surface, a film holding is in this accepts the region to be located the top of this rubber ring, a fixed loop holding is in this accepts the region to be located the top of this film, a cardboard supports downwards and presses in the outer peripheral edges of the top surface of this fixed loop, and the top surface of this roof is equipped with the press section of an undercut, and this press section lies in around this cardboard outer. Borrow this, can add the inseparable degree of strong fix fixed loop, let the film enclosing cover fit the top of the air vent of roof.

Description

Lithium battery blast resistance construction

Technical field

This utility model is related to a kind of lithium battery blast resistance construction, espespecially a kind of close-connected lithium battery blast resistance construction of top board that can make explosion-proof thin film and lithium cell core housing.

Background technology

The structure of current lithium cell core mainly includes a housing, and housing is built-in is placed with electrolyte solution and the positive plate, isolating membrane and the negative plate that adopt lamination or winding assembling mode to assemble. Wherein, after each positive plate welds with positive pole ear respectively, then being welded on the bottom of the positive terminal of housing, each negative plate welds with negative lug respectively, then is welded on the bottom of the negative terminal of housing simultaneously simultaneously. The top of positive terminal and negative terminal is then be respectively equipped with external screw thread, so as to, after screwing togather a nut respectively, fixing different binding posts respectively, with outside output power respectively.

Wherein, when charge and discharge state, it is easy to allow the electrolyte solution temperature in housing rise, and produce gas. And in order to prevent from making case fragmentation because of the rapid expanding of gas, the top board of current lithium battery casing can iron last layer explosion-proof thin film mostly, or in spot welding mode, explosion-proof film point is welded on top board, to close explosionproof hole, so as to when gas rapid expanding, break through the obstruct of explosion-proof thin film, to reach the purpose of pressure release.

But, in spot welding mode, explosion-proof film point being welded on top board, because the watt level of mash welder is difficult to adjust, so that easily wearing out explosion-proof thin film because power is too high during spot welding, or causing rosin joint phenomenon because power is too little, make product quality be difficult to control. And if utilize a heater directly to be ironed on top board by explosion-proof thin film in the way of heating, pressurization, then be only capable of allowing explosion-proof thin film sink the combination to form wire with top board, it is in conjunction with being also not as reliable in quality. Thus, when explosion-proof thin film and top board do not have complete closely sealed time, not only easily allow electrolyte solution leak, and explosion-proof thin film can be allowed to pop when the gas pressure in housing is not too high, make the housing of lithium cell core to re-use and shorten the service life of product.

Utility model content

In view of this, in order to provide a kind of structure being different from prior art, and improving above-mentioned shortcoming, inventor amasss experience for many years and constantly researches and develops improvement, then has generation of the present utility model.

A purpose of the present utility model is in that to provide a kind of molding one clamp and press section in the way of punching press, make location retainer ring, and then make the completely closely sealed lithium battery blast resistance construction of thin film and top board, the problem making electrolyte solution leakage and explosion-proof thin film pop ahead of time so that the bad in conjunction with quality of existing explosion-proof thin film can be solved, and product quality can be effectively improved, when making the gas pressure in housing arrive preset pressure, explosion-proof thin film is allowed to pop, to avoid the waste of product and to reduce production cost, and extend the service life of product.

For reaching the purpose of foregoing invention, the lithium battery blast resistance construction set by this utility model is located on the top board on a lithium cell core housing top; Its main technical characterstic is in that: this top board has the undertaking region and passage that connect up and down, accepts region by the end face concave downward of top board, accepts region and has annular bottom surface, and annular bottom surface is positioned at the top perimeter of passage; One cushion rubber is placed in undertaking region, and is positioned at the top of annular bottom surface; One thin film is placed in undertaking region, and is positioned at the top of cushion rubber; One retainer ring is placed in undertaking region, and is positioned at the top of thin film; One clamp presses on downwards the outer peripheral edge of the end face of retainer ring; And the end face of this top board is provided with the press section of a concave downward, and extruded parts is in the outside of clamp.

During enforcement, this undertaking region is circular trough, and this passage is circular port, and the diameter of circular trough is more than the diameter of passage.

During enforcement, this clamp is the annular lug extended towards the center accepting region with horizontal direction by the end face of top board.

During enforcement, this press section is stamped cannelure.

The beneficial effects of the utility model are:

1, clamp of the present utility model can effectively position retainer ring, and make retainer ring tightly suppress thin film and the cushion rubber of stacking, thin film is made can really to seal up passage, when gas pressure in housing arrives preset pressure, explosion-proof thin film just can be allowed to pop, therefore, the product waste caused because explosion-proof thin film pops ahead of time can be prevented effectively from, and extend the service life of product.

2, this utility model is when ram extrusion portion, and the internal diameter of clamp can be made to reduce, and compresses the area of retainer ring increasing clamp, therefore, can be prevented effectively from air and be revealed by the outer peripheral edge of retainer ring, to promote airtight effect.

For ease of this utility model can be had a better understanding, after being hereby specified in:

Accompanying drawing explanation

Fig. 1 is the three-dimensional appearance schematic diagram of the preferred embodiment of this utility model lithium battery blast resistance construction.

Fig. 2 is the A-A ' profile of Fig. 1.

Fig. 3 is the portion of element exploded view of the preferred embodiment of this utility model lithium battery blast resistance construction.

Fig. 4 is the three-dimensional appearance signal after each element combination of Fig. 3.

Fig. 5 is the B-B ' profile of Fig. 4.

Fig. 6 is the combination generalized section after the card sheet metal forming of the preferred embodiment of this utility model lithium battery blast resistance construction.

When Fig. 7 is the press section molding of the preferred embodiment of this utility model lithium battery blast resistance construction, clamp produces the combination generalized section of displacement.

[description of reference numerals]

Lithium battery blast resistance construction 1 top board 2

Accept region 21 annular bottom surface 211

Passage 22 cushion rubber 3

Thin film 4 retainer ring 5

Clamp 6 press section 7.

Detailed description of the invention

This utility model is a kind of lithium battery blast resistance construction, wherein, this lithium cell core has a housing, the top of housing is provided with a metal top plate, and this top board has an end face and a bottom surface, and this blast resistance construction is incorporated on top board, to close passage, during so as to the gas rapid expanding in housing to the pressure set, break through the obstruct of explosion-proof thin film, to reach the purpose of pressure release.

Refer to shown in Fig. 1, Fig. 2, it is the preferred embodiment of this utility model lithium battery blast resistance construction 1, including from bottom to top sequentially stacking cushion rubber 3, thin film 4, retainer ring 5 accepted in region 21 being contained in top board 2, and clamp 6, press section 7.

As shown in Fig. 3��Fig. 5, this top board 2 is strip aluminium sheet, top board 2 has the undertaking region 21 and round vent 22 that connect up and down, accept region 21 by the end face concave downward of top board 2, accepting region 21 is the diameter circular groove more than round vent 22 diameter, accepting region 21 have same axle center with passage 22 and upper and lower connect, undertaking region 21 has an annular bottom surface 211, and annular bottom surface 211 is positioned at the top perimeter of passage 22. During enforcement, passage 22 can be also square hole, or is other geometries, and accepting region 21 also can be square indentations, or is the groove of other geometries.

This cushion rubber 3 is an annular plate, and this thin film 4 is the sheet metal of aluminium foil etc, and this retainer ring 5 is annular steel ring. Cushion rubber 3, thin film 4 and retainer ring 5 are laminated in undertaking region 21, and cushion rubber 3 is positioned at the top of annular bottom surface 211, and thin film 4 is positioned at the top of cushion rubber 3, and retainer ring 5 is positioned at the top of thin film 4.

As shown in Figure 6, this clamp 6 is the annular lug that the end face by top board 2 extends towards the center accepting region 21 with horizontal direction, to press on downwards the outer peripheral edge of the end face of retainer ring 5. And as it is shown in fig. 7, this press section 7 forms the cannelure of concave downward for the end face of stamped top board 2, and press section 7 is positioned at the outside of clamp 6. Whereby, can when press section 7 molding, allow clamp 6 be produced horizontal displacement with horizontal direction towards the center accepting region 21 by the end face of top board 2 simultaneously, compress the area of retainer ring 5 increasing clamp 6, so that cushion rubber 3, thin film 4 and retainer ring 5 are combined closely in the undertaking region 21 of top board 2, with completely enclosed passage 22.

Therefore, this utility model has the advantage that

In sum, according to content disclosed above, this utility model really can reach intended purpose, one is provided to can ensure that airtight effect is to improve product quality, and the lithium battery blast resistance construction extending product service life, the value that great industry utilizes, whence proposes utility application in accordance with the law.

Claims

1. a lithium battery blast resistance construction, is located on the top board on a lithium cell core housing top;It is characterized in that:

This top board has connect up and down one and accepts region and a passage, and this undertaking region is by the end face concave downward of this top board, and this undertaking region has an annular bottom surface, and this annular bottom surface is positioned at the top perimeter of this passage;

One cushion rubber is placed in this undertaking region, and is positioned at the top of this annular bottom surface;

One thin film is placed in this undertaking region, and is positioned at the top of this cushion rubber;

One retainer ring is placed in this undertaking region, and is positioned at the top of this thin film;

One clamp presses on downwards the outer peripheral edge of the end face of this retainer ring; And

The end face of this top board is provided with the press section of a concave downward, and this extruded parts is in the outside of this clamp.

2. lithium battery blast resistance construction as claimed in claim 1, it is characterised in that: this undertaking region is circular trough, and this passage is circular port, and the diameter of this circular trough is more than the diameter of this passage.

3. lithium battery blast resistance construction as claimed in claim 1, it is characterised in that: this clamp is the annular lug extended towards the center in this undertaking region with horizontal direction by the end face of this top board.

4. the lithium battery blast resistance construction as described in claim 1 or 3, it is characterised in that: this press section is stamped cannelure.