CN206727138U - Cylindrical lithium battery housing - Google Patents
Cylindrical lithium battery housing Download PDFInfo
- Publication number
- CN206727138U CN206727138U CN201720603832.1U CN201720603832U CN206727138U CN 206727138 U CN206727138 U CN 206727138U CN 201720603832 U CN201720603832 U CN 201720603832U CN 206727138 U CN206727138 U CN 206727138U
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- CN
- China
- Prior art keywords
- bottom wall
- lithium battery
- battery housing
- cylindrical lithium
- stress weakness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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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- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
Abstract
A kind of cylindrical lithium battery housing, belongs to technical field of lithium batteries.It is circular and there is a bottom wall, feature formed with the enclosure body of lithium cell chamber, the enclosure body including one：The logical bottom wall stress weakness groove of a ring is offered on the bottom wall and around the center of bottom wall, a burst disk is formed in the central region of bottom wall by the bottom wall stress weakness groove.Due to constructing a burst disk by bottom wall stress weakness groove directly on the bottom wall of enclosure body, thus preferable explosion-proof effect can be both embodied, and can simplifies structure and reduces cost and improve manufacture efficiency.
Description
Technical field
The utility model belongs to technical field of lithium batteries, and in particular to a kind of cylindrical lithium battery housing.
Background technology
As is known in the industry, because lithium battery has, capacity is big, in light weight, be on active service cycle length, energy density are high, memoryless effect
Should, self-discharge rate is low and the strong point such as environmentally friendly, thus thought highly of by industry and be widely used in electric automobile（Also referred to as
" new-energy automobile "）, electric bicycle or even each type electric tool, digital product etc..
And then as is known in the industry, when such as short circuit or the situation influenceed by other factorses occur for lithium battery, inside battery
I.e. battery container internal energy can drastically discharge, inside battery air pressure increase, so as to trigger explosion accident.Thus in lithium battery
To set rupture pressure disc, pressure releasing chamber be the usual technical measures of current industry at reasonable position.For the lithium battery case of rectangular box shape body
Body, rupture pressure disc or pressure releasing chamber are set generally on lithium battery casing cover plate or open up relief hole.To this reference can be made to Chinese patent
Document CN102437293A（A kind of anti-explosion cover plate of lithium ion battery）、CN202585604U（A kind of electrokinetic cell and its top cover knot
Structure）、CN202495489U（Top cover structure of power battery）、CN102339959A（Cover board for pole type lithium battery）With
CN202308090U（Cover board for pole type lithium battery）, etc..
Itd is proposed due to being not limited to the above-mentioned patent enumerated both for the cover plate of rectangular-shaped lithium battery casing, thus
Do not have referential meaning for cylindrical lithium battery housing, because the structure of cylindrical lithium battery and the knot of rectangular box shape body
Structure is far from each other.
The technical information of equally visible all cylindrical lithium batteries, such as CN201868505U in disclosed Chinese patent literature
（A kind of novel cylindrical lithium battery）、CN103682488A（A kind of cylinder type lithium battery with defencive function）With
CN105552296A（A kind of safe charging formula lithium battery structure and application）, it is not limited to the foregoing cylindrical lithium battery enumerated not
Provide the enlightenment for being able to pressure-relief explosion-proof.
" a kind of explosion-proof lithium battery " that Authorization Notice No. CN202888329U recommends is in lower housing portion（With the figure of the patent
Exemplified by showing state）Shell intracavitary set an explosion-proof diaphragm, specifically, explosion-proof diaphragm is arranged on to the shell intracavitary of lower housing portion
Between insulating protection pad and PTC rings, the 0017th to 0018 section of the patent specification for details, reference can be made to.Although the patent formula energy
The technique effect of the 0014th section of record of its specification is embodied, but complicated is its shortcoming.
The content of the invention
Task of the present utility model be to provide it is a kind of help to make enclosure body itself possess good explosion-proof effect and
Use significantly simplified structure and reduce the cylindrical lithium battery housing of manufacturing cost.
What task of the present utility model was performed by, a kind of cylindrical lithium battery housing, including a circular and shape
Into the enclosure body for having lithium cell chamber, the enclosure body has a bottom wall, is characterised by the bottom wall and surrounds bottom wall
Center offer the logical bottom wall stress weakness groove of a ring, form one in the central region of bottom wall by the bottom wall stress weakness groove and prevent
Quick-fried.
In a specific embodiment of the present utility model, position of the described bottom wall stress weakness groove on the bottom wall
Setting in bottom wall back to the side of the lithium cell chamber.
In another specific embodiment of the present utility model, the depth of described bottom wall stress weakness groove is the bottom
The half of wall thickness is to 1/5th.
In another specific embodiment of the present utility model, the shape of cross section of described bottom wall stress weakness groove is in
∧ fonts.
In another specific embodiment of the present utility model, the enclosure body is metal.
Technical scheme provided by the utility model directly on the bottom wall of enclosure body due to passing through bottom wall stress weakness groove
A burst disk is constructed, thus can both embody preferable explosion-proof effect, and can simplifies structure and reduces cost and improve manufacture
Efficiency.
Brief description of the drawings
Fig. 1 is embodiment schematic diagram of the present utility model.
Fig. 2 is application examples schematic diagram of the present utility model.
Embodiment
Embodiment：
Fig. 1 is referred to, show a circular i.e. tubular and the enclosure body 1 formed with lithium cell chamber 11, the shell
Body body 1 has a bottom wall 12.
Technical essential as technical scheme provided by the utility model：On foregoing bottom wall 12 and around bottom wall 12
Center offers the logical bottom wall stress weakness groove 121 of a ring, by the bottom wall stress weakness groove 121 bottom wall 12 central region shape
Into a burst disk 122.
As shown in Figure 1, foregoing 121 position on foregoing bottom wall 12 of bottom wall stress weakness groove is located at bottom wall 12 back to preceding
State the side of lithium cell chamber 11, the i.e. side outside.
In the present embodiment, the depth of foregoing bottom wall stress weakness groove 121 is the half of foregoing bottom wall thickness, but
Can also be 1/3rd, a quarter or 1/5th.
Preferably, the shape of cross section of foregoing bottom wall stress weakness groove 121 is in ∧ fonts.
In the present embodiment, foregoing enclosure body 1 is metal.
Application examples：
Refer to Fig. 2 and combine Fig. 1, figure 2 illustrates the lithium cell 2 being installed in lithium cell chamber 11（That is lithium electricity
Chi Xin）, for example can be found in what is referred in the superincumbent background technology column of applicant because the structure of lithium cell 2 belongs to prior art
Patent document, thus repeat no more.
When air pressure increase is gas expansion and reaches and be enough to overcome bottom wall stress weakness groove 121 to bear in lithium cell chamber 11
During degree, then the bottom wall stress weakness groove 121 can be broken completely, and burst disk 122 is separated with bottom wall 12, and lithium cell chamber 11 is beaten
Open, play explosion-proof effect, that is, avoid that accident occurs.
In summary, technical scheme provided by the utility model compensate for the shortcoming in prior art, favorably accomplish
Invention task, the technique effect referred in the superincumbent technique effect column of applicant is faithfully cashed.
Claims (5)
1. a kind of cylindrical lithium battery housing, including a circular and enclosure body (1) formed with lithium cell chamber (11), the shell
Body body (1) has a bottom wall (12), it is characterised in that is opened up on the bottom wall (12) and around the center of bottom wall (12)
There is the logical bottom wall stress weakness groove (121) of a ring, formed by the bottom wall stress weakness groove (121) in the central region of bottom wall (12)
One burst disk (122).
2. cylindrical lithium battery housing according to claim 1, it is characterised in that described bottom wall stress weakness groove (121) exists
Position on the bottom wall (12) is located at bottom wall (12) back to the side of the lithium cell chamber (11).
3. cylindrical lithium battery housing according to claim 1, it is characterised in that described bottom wall stress weakness groove (121)
Depth for the bottom wall thickness half to 1/5th.
4. according to the cylindrical lithium battery housing described in claim 1 or 2 or 3, it is characterised in that described bottom wall stress weakness groove
(121) shape of cross section is in ∧ fonts.
5. cylindrical lithium battery housing according to claim 1, it is characterised in that the enclosure body (1) is metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720603832.1U CN206727138U (en) | 2017-05-26 | 2017-05-26 | Cylindrical lithium battery housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720603832.1U CN206727138U (en) | 2017-05-26 | 2017-05-26 | Cylindrical lithium battery housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206727138U true CN206727138U (en) | 2017-12-08 |
Family
ID=60511595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720603832.1U Active CN206727138U (en) | 2017-05-26 | 2017-05-26 | Cylindrical lithium battery housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206727138U (en) |
-
2017
- 2017-05-26 CN CN201720603832.1U patent/CN206727138U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |