CN207587784U - A kind of cover board and battery case for metal battery case - Google Patents
A kind of cover board and battery case for metal battery case Download PDFInfo
- Publication number
- CN207587784U CN207587784U CN201721864931.1U CN201721864931U CN207587784U CN 207587784 U CN207587784 U CN 207587784U CN 201721864931 U CN201721864931 U CN 201721864931U CN 207587784 U CN207587784 U CN 207587784U
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- Prior art keywords
- explosion
- cover board
- sheet metal
- proof
- proof marking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model is related to a kind of cover boards for metal battery case, cover board body is equipped with liquid injection hole, the sheet metal of sealing liquid injection hole is equipped at liquid injection hole, sheet metal is equipped with explosion-proof marking, the pattern of explosion-proof marking is made of the lines for being depressed in sheet metal surface, and it is explosion-proof to form the position progress easily torn.Relative to the prior art, explosion-proof marking is transferred to sheet metal by cover board, simplify deck design and processing technology, when the quality to explosion-proof marking checks, the intensity of the explosion-proof marking to sheet metal is only needed to check one by one, rather than entire cover board is checked, therefore save testing cost.The utility model further includes the battery case with the utility model cover board.
Description
Technical field
The utility model belong to battery technology field more particularly to high security, it is simple in structure and by liquid injection hole with
A kind of cover board for metal battery case that explosion-proof valve is integrated in one.
Background technology
Since country proposes new energy strategy, government and enterprise are also persistently overheating to the concern of new-energy automobile industry,
And as the key components and parts of new-energy automobile industry, lithium ion battery has become the key problem of department's concerns at different levels, wherein,
The cost and security performance of lithium ion battery become the emphasis of industry concern.Therefore, it in lithium ion battery production process, is protecting
The problem of under the premise of demonstrate,proving safety, how reducing manufacture cost to the greatest extent, becoming concern of the lithium ion battery into production producer.
Existing lithium ion battery with aluminum shell shell is divided into two parts：Aluminum hull housing and cover board, the two are combined by laser welding
It is integrated, there are two the construction packages with critical function on the cover board：When liquid injection hole, for injecting the electrolyte into housing
Inside, second is that explosion-proof valve, it, can be first in cover board at the marking of explosion-proof valve when inner pressure of lithium ion battery is more than setting pressure
It ruptures, releases stress with housing commissure, avoid inner pressure of lithium ion battery accumulation is excessive from causing to explode.The two function knots
Structure is indispensable.As shown in Figure 1, the production process for current aluminum-shell battery, independently makes explosion-proof on cover board 1 first
Valve 11 and liquid injection hole 12 then by cover board 1 and case weld, inject electrolyte from liquid injection hole 12, then with sealing 13 envelope of aluminium nail
The firmly liquid injection hole 12 of cover board 1, seals liquid injection hole 12.This structure has 1) two need to make on cover board 1
12 two functional structures of explosion-proof valve 11 and liquid injection hole, technique is cumbersome, can increase the processing cost of cover board 1；2) explosion-proof valve is being checked
Whether 11 when conforming to quality requirements, and needs to hold entire cover board 1 and carries out destructive inspection, and cover board is usually bigger than heavier, because
And testing cost can be increased.
Utility model content
In order to solve the problems, such as that existing battery cover board processing cost and testing cost are higher, the utility model wishes that proposition will
The explosion-proof covering board for a kind of metal battery case that the liquid injection hole of cover board is integrated in one with explosion-proof valve and with the explosion-proof covering board
Battery case.
In order to achieve the above object, the main technical schemes that the utility model uses include：
A kind of cover board for metal battery case, including：
Cover board body is provided with liquid injection hole on the cover board body；
Sheet metal, the sheet metal are equipped with the liquid injection hole, for sealing the liquid injection hole；
Explosion-proof marking, the explosion-proof marking are set on the sheet metal, and the pattern of the explosion-proof marking is by being depressed in
It is explosion-proof to form the position progress easily torn for the lines composition on the sheet metal surface.
Preferably, the sheet metal by solder joints in the liquid injection hole.
Preferably, the cover board of the utility model further includes hard plastic sheet, and the hard plastic sheet is covered in the sheet metal table
Face, and set at the corresponding explosion-proof marking.
Preferably, the explosion-proof marking is using punch forming；Or the sheet metal and the explosion-proof marking integrated punching
Molding.
Preferably, the pattern of the explosion-proof marking includes three concentric circles；Or the pattern of the explosion-proof marking includes two
A concentric circles and the lines radially extended along the concentric circles；Or the pattern of the explosion-proof marking includes at least two intersections
In the lines of a bit.The lines intersection deformation of explosion-proof marking is maximum, and intersection is burst first, is then torn along explosion-proof marking
It splits.
Preferably, the lines of the explosion-proof marking are in the shape of the letter V on the section along the sheet thicknesses direction.In battery
Under portion's high pressure conditions, stress is more concentrated at the marking of sharp shape, and deformation surplus is larger, therefore fracture is more readily formed.
In order to ensure normal strength demand at explosion-proof marking, the depth of the explosion-proof marking is the sheet thicknesses
1/3~2/3.
Preferably, the cover board is rectangular aluminum cover board.
Preferably, the explosion-proof marking is arranged on the medial surface of sheet metal, relative to the lateral surface for being arranged on sheet metal
For, it can protect explosion-proof marking set on medial surface.When pressure is excessive in battery case, air pressure inside drives the sheet metal
Expansion, the sheet metal are deformed upon by the outside side of medial surface, popped at the lines of explosion-proof marking outward.
A kind of battery case, the battery case include housing and cover board, and the housing is square casing, and the cover board is
The cover board that any of the above embodiment is limited.Preferably, the metal shell is aluminium shell.
The advantageous effects of the utility model are：
The liquid injection hole of cover board and explosion-proof valve are mainly integrated in one by the utility model, and blast resistance construction is shifted from cover board
To sheet metal.In cell manufacturing process, first cover board is welded on metal-back, electrolyte is injected by liquid injection hole, then
The sheet metal for having been provided with explosion-proof marking with one again is bonded to liquid injection hole, and liquid injection hole is closed.Explosion-proof marking is used for when electricity
When the pressure of pond enclosure is more than critical value, due to the presence of explosion-proof marking line, enable the position prior to cover board and gold
The weld for belonging to shell deforms cracking, so that the pressure inside metal-back be released, avoids exploding.
In addition, the utility model also adds last layer hard plastic sheet to play protection metal at the explosion-proof marking of sheet metal
The effect of the explosion-proof marking of on piece, and the hard plastic sheet can provide certain anti-pressure ability, prevent chain explosion.
The utility model further the combining form to explosion-proof marking, linear and depth etc. of explosion-proof marking line into advancing one
Step optimization, combination and design, to further increase the explosion-proof performance of safety relief, and take into account the normal pressure resistance of sheet metal simultaneously
Degree, prevents electrolyte from leaking easily.
Description of the drawings
Fig. 1 is structure diagram of the prior art for the cover board of metal battery case.
Fig. 2 is structure diagram of the utility model preferred embodiment for the cover board of metal battery case.
Fig. 3 is the cross-sectional view of sheet metal and the lines of explosion-proof marking in the utility model preferred embodiment.
【Reference sign】
1 cover board；11 explosion-proof valves；12 liquid injection holes；13 sealing aluminium nails；
2 cover board bodies；21 liquid injection holes；22 sheet metals；23 hard plastic sheets；221 explosion-proof markings；The line of 2211 explosion-proof markings
Item.
Specific embodiment
It is below in conjunction with the accompanying drawings, right by specific embodiment in order to understand in order to preferably explain the utility model
The utility model is described in detail.
As shown in Fig. 2, the preferred embodiment for utility model.The cover board for metal battery case of the present embodiment,
Including cover board body 2, preferably a kind of rectangular aluminum cover board；Liquid injection hole 21 is equipped on cover board body 2, sheet metal 22 is used to connect
Liquid injection hole 21 is closed to be closed liquid injection hole 21, wherein sheet metal 22 be equipped with it is explosion-proof marking 221, it is explosion-proof marking 221 pattern by
The lines 2211 for being depressed in 22 surface of sheet metal form, and it is explosion-proof to form the position progress easily torn.It is produced in metal battery case
In the process, cover board body 2 and metal shell solder joints are formed an electrolyte holding tank, then passes through liquid injection hole first
21 internally inject electrolyte, then by sheet metal 22 solder joints to liquid injection hole 21, thus seal liquid injection hole 21.Work as gold
Belong to enclosure and generate that gas pressure is increasing, and during more than critical value, pressure can make the explosion-proof marking 221 of sheet metal 22 first
It deforms, sheet metal 22 is made to be torn at explosion-proof marking 221, the pressure in metal shell is released, prevents pressure is excessive from drawing
Play explosion.Preferably, it is corresponded on 22 surface of sheet metal and also covers one layer of hard plastic sheet 23 at explosion-proof marking 221, play protection
The effect of explosion-proof marking on sheet metal.Hard plastic sheet 23 can be bonded in 22 surface of sheet metal by viscose glue.
Wherein, 221 system of explosion-proof marking on sheet metal 22 includes what is set thereon using punch forming or sheet metal 22
Explosion-proof marking 221 generally integrated punching is molded.
Wherein, the form of 221 patterns of explosion-proof marking, can be as shown in Fig. 2, the pattern of explosion-proof marking 221 includes two with one heart
Circle and the lines 2211 radially extended along concentric circles, in other embodiments, the pattern of explosion-proof marking 221 can be three concentric
Justify or intersect at any by the lines 2211 of at least two explosion-proof markings and be composed, the lines of the pattern of explosion-proof marking 221
2211 intersection deformation are maximum, and intersection is burst first, then torn along the lines 2211 of explosion-proof marking 221, release interior
Portion's pressure.Explosion-proof marking 221 is arranged on the medial surface or lateral surface of sheet metal 22, preferentially set on medial surface, can be protected explosion-proof
Marking 221 (can protect explosion-proof marking 221) for opposite exterior lateral sides face.When pressure is excessive in battery case, air pressure inside is driven
Dynamic sheet metal 22 expands outward, and sheet metal 22 can be deformed upon by the outside side of medial surface, most afterwards through quick-fried at explosion-proof marking 221
It opens.
As shown in figure 3, the sectional view of the sheet metal 22 for the utility model preferred embodiment, it can be seen that explosion-proof marking
The line style and depth of 221 lines 2211.As shown in figure 3, the cross section of the lines 2211 of explosion-proof marking 221 is in the shape of the letter V, V words
The cross section of shape can ensure lines 2211 of the structure compared to rectangular section of sheet metal 22, it is possible to provide necessary compression strength,
It can deform and crack at the lines 2211 of explosion-proof marking 221 in the case where pressure is excessive again simultaneously.Inside battery high pressure
Under state, the marking stress of V-shaped sharp shape is more concentrated, and deformation surplus is larger, thus is more easily broken off；It is relative to half
Round or arc-shaped iso-cross-section, its tension of the marking of V-shaped cross section is smaller, is easy to pop and be pressed inside metal shell with releasing
Power prevents battery accumulation pressure from setting off an explosion.For the normal compression strength of budget metals piece 22 and the need of timely drainage pressure
It asks, the line depth of explosion-proof marking 221 is 1/3~2/3, preferably 1/2 (as shown in Figure 3) of sheet thicknesses.
It is summed up, the explosion-proof covering board of the metal battery case of the utility model, advantageous effects mainly include：
(1) explosion-proof covering board 1 of the metal battery case of the utility model, simplifies deck design and processing technology, in life
Cost is reduced during production processing procedure.
(2) by it is explosion-proof marking 221 be set on sheet metal 22 on, the function of liquid injection hole and explosion-proof valve is integrated, do not influence lithium from
The normal procedure for producing of sub- battery and safe to use.
(3) relative to the prior art, after explosion-proof marking 221 is transferred to sheet metal 22 by cover board, in explosion-proof marking quality
Inspection when, it is only necessary to intensity/compression strength of the explosion-proof marking 221 of sheet metal 22 is checked one by one (only need to hold gold
Belong to piece 22 to be checked) rather than entire heavier larger cover board is checked, therefore save testing cost.
Claims (10)
1. a kind of cover board for metal battery case, which is characterized in that including：
Cover board body is provided with liquid injection hole on the cover board body；
Sheet metal, the sheet metal are equipped with the liquid injection hole, for sealing the liquid injection hole；
Explosion-proof marking, the explosion-proof marking is set on the sheet metal, and the pattern of the explosion-proof marking is described by being depressed in
It is explosion-proof to form the position progress easily torn for the lines composition on sheet metal surface.
2. cover board according to claim 1, which is characterized in that the sheet metal solder joints are in the liquid injection hole.
3. cover board according to claim 1, which is characterized in that further include hard plastic sheet, the hard plastic sheet covering
On the sheet metal surface, and set at the corresponding explosion-proof marking.
4. according to claim 1-3 any one of them cover boards, which is characterized in that the explosion-proof marking is using punch forming；Or
Sheet metal described in person and the explosion-proof marking integrated punching molding.
5. cover board according to claim 1, which is characterized in that
The pattern of the explosion-proof marking includes three concentric circles；Or
The pattern of the explosion-proof marking includes two concentric circles and the lines radially extended along the concentric circles；
Or the pattern of the explosion-proof marking includes at least two lines for intersecting at a bit.
6. cover board according to claim 5, which is characterized in that the lines of the explosion-proof marking are along the sheet thicknesses
It is in the shape of the letter V on the section in direction.
7. cover board according to claim 6, which is characterized in that the depth of the lines is the 1/3 of the sheet thicknesses
~2/3.
8. cover board according to claim 7, which is characterized in that the explosion-proof marking is arranged on the sheet metal medial surface
On.
9. cover board according to claim 1, which is characterized in that the cover board is rectangular aluminum cover board.
10. a kind of battery case, which is characterized in that the battery case includes housing and cover board, and the housing is square casing,
The cover board is claim 1-9 any one of them cover boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721864931.1U CN207587784U (en) | 2017-12-27 | 2017-12-27 | A kind of cover board and battery case for metal battery case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721864931.1U CN207587784U (en) | 2017-12-27 | 2017-12-27 | A kind of cover board and battery case for metal battery case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207587784U true CN207587784U (en) | 2018-07-06 |
Family
ID=62740454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721864931.1U Active CN207587784U (en) | 2017-12-27 | 2017-12-27 | A kind of cover board and battery case for metal battery case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207587784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437453A (en) * | 2021-06-30 | 2021-09-24 | 珠海冠宇电池股份有限公司 | Battery and manufacturing method thereof |
| WO2022117098A1 (en) * | 2020-12-04 | 2022-06-09 | 珠海冠宇电池股份有限公司 | Button cell and electronic device |
-
2017
- 2017-12-27 CN CN201721864931.1U patent/CN207587784U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022117098A1 (en) * | 2020-12-04 | 2022-06-09 | 珠海冠宇电池股份有限公司 | Button cell and electronic device |
| CN113437453A (en) * | 2021-06-30 | 2021-09-24 | 珠海冠宇电池股份有限公司 | Battery and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20230426 Granted publication date: 20180706 |