CN201985182U - Lithium ion battery cap - Google Patents
Lithium ion battery cap Download PDFInfo
- Publication number
- CN201985182U CN201985182U CN2011200134436U CN201120013443U CN201985182U CN 201985182 U CN201985182 U CN 201985182U CN 2011200134436 U CN2011200134436 U CN 2011200134436U CN 201120013443 U CN201120013443 U CN 201120013443U CN 201985182 U CN201985182 U CN 201985182U
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- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- explosion
- top cover
- cap
- 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.)
- Expired - Lifetime
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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
Abstract
The utility model discloses a lithium ion battery cap, which comprises a top cap and a bottom cap which are sealed and fixed by each other. The top cap is provided with an upward protruding anode contact, and lateral sides of the anode contact are provided with a plurality of pressure relief holes. The bottom cap is provided with an annular anti-explosion notch which cracks under specific pressure, the edge of the bottom cap is bended upward to tightly wrap the edge of the top cap, and a circle of upward anti-explosion bosses are further arranged on the top cap along the periphery of the anode contact. The structure not only enhances the sealing property of the lithium ion battery cap and reduces the internal resistance of the lithium ion battery, but also provides stable anti-explosion pressure threshold value and improves the safety of the lithium ion battery.
Description
Technical field
The utility model relates to a kind of battery cap, especially a kind of lithium ion battery cover.
Background technology
Along with improving constantly of expanding economy and people's living standard, various mobile electronic devices obtain popularizing greatly in society such as mobile phone, digital camera, notebook computer or the like.These portable digital electronic products rely on battery operated usually, thereby have formed the wilderness demand to battery again.Existing battery has many kinds, and such as nickel-cadmium cell, Ni-MH battery, lithium ion battery or the like, wherein lithium ion battery is widely used because it has various advantages such as memory-less effect, energy density height.Wherein columniform lithium ion battery is because the technology and the equipment of its standardized size, maturation occupy important share in Battery Market.
In numerous building blocks of lithium ion battery, blocking a shot is a critical component wherein, and the quality of its design is directly connected to the performance of battery, the close property of liquid, fail safe and cost.Existing lithium battery cap generally includes top cover, and bottom is clipped in the security components such as rupture pressure disc between top cover and the bottom, and the sealing ring that is used for the above-mentioned parts of sealing and fixing, and structural disadvantages wherein has:
1, on bottom, is provided with impression on the existing lithium battery cap usually, this impression breaks when lithium battery interior pressure arrives dangerous values and guarantees purpose of safety to reach pressure release, but existing structure can not guarantee that impression breaks when pressure reaches design load, its error range is bigger, can not guarantee the safe handling of battery effectively;
2, because top cover and bottom are by sealing ring pressing sealing and fixing, can cause the contact resistance between top cover and the bottom to increase in the process of long storage time or use, cause the internal resistance of entire lithium ion battery to increase, thereby influence its output voltage, even can't normally discharge and recharge;
3, described sealing ring is made by nonmetallic materials such as plastics usually, long storage time or use back descend because of sealability, the situation that leakage can occur, this not only can damage battery itself, and the battery liquid that spills has strong corrosivity, all can work the mischief to electronic product and user.
The utility model content
At above situation, it is a kind of simple in structure but the lithium ion battery cover of stablizing the pressure release threshold value can be provided that the purpose of this utility model is to provide.
In addition, this lithium battery cap that the utility model provides can not only reduce the internal resistance of cell effectively, strengthens sealing and fail safe, and it has reduced cost by simplified structure, is beneficial to popularization.
The technical solution adopted in the utility model can be described as:
A kind of lithium ion battery cover, the top cover and the bottom that comprise mutual sealing and fixing, described top cover is provided with the cathode contact that raises up, the side of described cathode contact has at least one relief hole, be processed with the explosion-proof recess indentation of the ring-type of under specified pressure, breaking on the described bottom, the periphery of described top cover upper edge cathode contact also is provided with a circle explosion-proof boss upwards, and the external diameter of described explosion-proof boss is greater than the external diameter of the explosion-proof recess indentation of described ring-type.
As a kind of improvement of above technical scheme, described bottom edge is the edge of the described top cover of the tight parcel of bending upwards.
As a kind of improvement of above technical scheme, direct pressing and fixing or fixing between described top cover and the bottom by welding.
As a kind of improvement of above technical scheme, described bottom is provided with boss down, and described explosion-proof recess indentation is located at the bottom of described boss.
The beneficial effects of the utility model are:
The lithium battery cap that is proposed is equipped with circle boss up at the cathode contact periphery of its top cover, between the impression that is used for explosion-proof relief on top cover and the bottom, to reserve the space, avoid top cover to push down impression and influence breaking of impression, provide the more accurate and stable critical pressure value of breaking with this; Space between top cover and the impression also allows the linear deformation of impression portion, makes impression under the acting in conjunction of vertical shear force and lateral pull, is easier to break.
In addition, the lithium ion battery cover that the utility model proposes can not only guarantee better sealing effectiveness by upwards bending the bottom edge and closely wrapping up top cover and weld to fix, prevented leakage effectively, and direct contact the between top cover and the bottom, can also reduce the internal resistance of cell effectively, further simplify production process and reduced production cost.
In sum, the lithium battery cap that the utility model proposed not only increases on performance, and is beneficial to production.
Description of drawings
Fig. 1 is the cutaway view of the lithium ion battery cover among the embodiment of the present utility model;
Fig. 2 is the vertical view of the lithium ion battery cover among Fig. 1;
Fig. 3 is the cutaway view of the lithium ion battery cover among another embodiment of the present utility model.
Embodiment
As shown in Figure 1, the lithium ion battery cover that the utility model proposed comprises top cover 1 and the bottom 2 that interfixes, top cover is provided with the cathode contact 3 that raises up, the side of described cathode contact 3 has the relief hole 4 of a plurality of even layouts, also be processed with the explosion-proof recess indentation of the ring-type of under specified pressure, breaking 5 on the bottom 2 as explosion-proof valve, internal pressure can be broken through the explosion-proof recess indentation 5 that is arranged on the bottom 2 when surpassing a certain threshold, discharge outside batteries by the relief hole 4 that is arranged on the top cover 1 again, avoid the lithium battery blast and damage electricity consumption product or harm users.
Wherein, key feature of the present utility model is that the periphery of top cover 1 upper edge cathode contact 3 is equipped with a circle explosion-proof boss 6 up, its external diameter is greater than the external diameter of the explosion-proof recess indentation 5 of described ring-type, and this structure can provide stable explosion-proof pressure threshold values effectively and lower fracture pressure can be provided on thicker indentation.Conventional battery cap does not have this step, thereby the outer ring of top cover 1 (the outer ring here refers to the cathode contact 3 outer parts of removing projection on the top cover 1) directly is pressed on the bottom 2, the design fracture pressure threshold values of explosion-proof like this recess indentation 5 can change because of the influence of top cover 1, and the explosion-proof step 6 that the utility model proposed raises up and greater than the external diameter of explosion-proof recess indentation 5, between top cover 1 and explosion-proof recess indentation 5, provide certain space, alleviated the influence of the fracture pressure threshold values of 1 pair of explosion-proof recess indentation 5 of top cover.In addition, in the battery cap of traditional structure, because be subjected to the influence of top cover 1, bottom 2 is very little in the distortion of vertical direction, explosion-proof recess indentation 5 mainly is to break under the effect of the vertical shear that produces at cell internal pressure, and like this, indentation just need be done very thinly to satisfy the requirement of low critical pressure, so thin indentation is easy to break in producing and assembling, and has caused inconvenience to production.And the capping structure that the utility model proposed leaves certain space above explosion-proof recess indentation 5, allow bottom 2 that bigger distortion is arranged in vertical direction, when bottom 2 is heaved distortion under the cell internal pressure effect like this, explosion-proof recess indentation 5 on the bottom 2 not only is subjected to vertical shear force effect, also is subjected to horizontal tension.Compare single vertical shear effect, indentation is easier under the acting in conjunction of vertical shear and lateral pull breaks, and like this, the capping structure that the utility model proposed just can be realized lower fracture pressure on thicker indentation, is convenient to produce.
The edge of bottom 2 is the edge of bending parcel top cover 1 upwards, in concrete enforcement, between top cover 1 and the bottom 2 except can also can additionally using technology connections such as laser, ultrasonic bonding by the direct pressing and fixing.This kind structure can strengthen the sealing between top cover 1 and the bottom 2 effectively, avoids long storage time or uses the back to have the risk of leakage because of sealing property descends as plastic seal ring.In addition, the direct contact of large tracts of land between top cover 1 and the bottom 2 can also reduce the internal resistance of battery effectively, avoids long storage time or uses the back to cause output voltage to descend because of internal resistance increases, and this point is particularly important for rechargeable lithium ion batteries.
In addition, as shown in Figure 2, in another one embodiment of the present utility model, can also add down a boss 7 on the bottom 2, described explosion-proof recess indentation 5 is located at the bottom of described boss 7, this boss 7 not only further draws back the distance between top cover 1 and the explosion-proof recess indentation 5, but also can be used as the welding stage that is connected with battery battery core.
Claims (5)
1. lithium ion battery cover, the top cover (1) and the bottom (2) that comprise mutual sealing and fixing, described top cover (1) is provided with the cathode contact (3) that raises up, the side of described cathode contact (3) has at least one relief hole (4), be processed with the explosion-proof recess indentation of the ring-type of under specified pressure, breaking (5) on the described bottom (2), it is characterized in that: the periphery of described top cover (1) upper edge cathode contact (3) also is provided with a circle explosion-proof boss (6) upwards, and the external diameter of described explosion-proof boss (6) is greater than the external diameter of the explosion-proof recess indentation of described ring-type (5).
2. a kind of lithium ion battery cover according to claim 1 is characterized in that: described bottom (2) edge upwards bends and wraps up the edge of described top cover (1).
3. a kind of lithium ion battery cover according to claim 1 is characterized in that: direct pressing and fixing between described top cover (1) and the bottom (2).
4. a kind of lithium ion battery cover according to claim 1 is characterized in that: fixing by welding between described top cover (1) and the bottom (2).
5. a kind of lithium ion battery cover according to claim 1 is characterized in that: described bottom (2) is provided with boss (7) down, and described explosion-proof recess indentation (5) is located at the bottom of described boss (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200134436U CN201985182U (en) | 2011-01-18 | 2011-01-18 | Lithium ion battery cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200134436U CN201985182U (en) | 2011-01-18 | 2011-01-18 | Lithium ion battery cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985182U true CN201985182U (en) | 2011-09-21 |
Family
ID=44612638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200134436U Expired - Lifetime CN201985182U (en) | 2011-01-18 | 2011-01-18 | Lithium ion battery cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201985182U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097604A (en) * | 2011-01-18 | 2011-06-15 | 杨福如 | Lithium ion battery cover cap |
| CN107305936A (en) * | 2016-04-25 | 2017-10-31 | 三星Sdi株式会社 | Secondary cell |
| CN114171829A (en) * | 2022-02-11 | 2022-03-11 | 中创新航科技股份有限公司 | Battery and battery device |
-
2011
- 2011-01-18 CN CN2011200134436U patent/CN201985182U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097604A (en) * | 2011-01-18 | 2011-06-15 | 杨福如 | Lithium ion battery cover cap |
| CN107305936A (en) * | 2016-04-25 | 2017-10-31 | 三星Sdi株式会社 | Secondary cell |
| CN107305936B (en) * | 2016-04-25 | 2022-04-29 | 三星Sdi株式会社 | Secondary battery |
| CN114171829A (en) * | 2022-02-11 | 2022-03-11 | 中创新航科技股份有限公司 | Battery and battery device |
| CN114171829B (en) * | 2022-02-11 | 2022-05-03 | 中创新航科技股份有限公司 | Battery and battery device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGMEN LANGDA GROUP CO., LTD. Free format text: FORMER NAME: RONDA BATTERY CO., LTD., PENGJIANG DISTRICT, JIANGMEN CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 7, building three, No. 185, 529000, 8, Jiangmen, Guangdong, China Patentee after: JIANGMEN PENGJIANG DISTRICT RONDA BATTERY CO., LTD. Address before: 7, building three, No. 185, 529000, 8, Jiangmen, Guangdong, China Patentee before: Jiangmen Pengjiang District Ronda Battery Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
|
| CX01 | Expiry of patent term |