CN202454632U - Lithium-ion battery sealing structure and lithium-ion battery thereof - Google Patents
Lithium-ion battery sealing structure and lithium-ion battery thereof Download PDFInfo
- Publication number
- CN202454632U CN202454632U CN2012200155973U CN201220015597U CN202454632U CN 202454632 U CN202454632 U CN 202454632U CN 2012200155973 U CN2012200155973 U CN 2012200155973U CN 201220015597 U CN201220015597 U CN 201220015597U CN 202454632 U CN202454632 U CN 202454632U
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- China
- Prior art keywords
- protruding block
- ion battery
- lithium ion
- cover plate
- liquid injection
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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)
- Secondary Cells (AREA)
Abstract
The utility model provides a lithium-ion battery sealing structure. The lithium-ion battery sealing structure comprises a cover plate, a liquid injection hole and an one-way relief valve, wherein the liquid injection hole is arranged on the cover plate, the one-way relief valve is used for sealing the liquid injection hole and comprises an upper protruding block, a lower protruding block and a tensioning column, the upper protruding block is located on the upper portion of the cover plate, the lower protruding block is buckled on the lower portion of the cover plate, the tensioning column penetrates through the liquid injection hole to connect the upper protruding block with the lower protruding block, the upper protruding block comprises a sealing portion and a clearance groove, the sealing portion contacts with the cover plate, the clearance groove is formed between the sealing portion and the tensioning column, a gap is reserved between the tensioning column and the cover plate, an air exhausting groove is arranged on the lower protruding block and communicated with the clearance groove through the gap, and the one-way relief valve also comprises a guide column which is arranged at the bottom of the lower protruding block. Besides, the utility model also provides a lithium-ion battery using the lithium-ion battery sealing structure. The guide column is arranged on the one-way relief valve, so that the valve is accurate to install and position and simple to assemble.
Description
Technical field
The utility model belongs to the electrokinetic cell field, relates in particular to a kind of sealing tech of lithium rechargeable battery.
Background technology
Along with modern society is fast-developing, also brought a series of problems simultaneously, in short supply like petroleum resources, environmental pollution is serious etc.Therefore, lithium ion battery is owing to have advantages such as voltage height, energy density are high, pollution-free and be used widely, and especially in the electrokinetic cell field, the demand of lithium ion battery is increasing.Lithium ion battery needs to inject electrolyte toward inside battery in process of production, could normally use through battery after the active material in the formation process precharge activated batteries then.Can produce a certain amount of gas but battery is inner in formation process, if untimely discharge can cause battery to swell, battery performance descends.
Traditional battery seal technology adopts the ball sealing, inserts when needing sealing, extracts when needing exhaust; In addition, a kind of unidirectional relief valve has appearred in recent years, the size of the pressure that this unidirectional relief valve can produce according to inside battery gas, and exhaust and airtight does not automatically need to insert for a long time or extract.But there is a shortcoming in the unidirectional relief valve of this structure, and this unidirectional relief valve is not easy the location, and then has improved the complexity of assembling process, is not easy assembling.
Summary of the invention
The utility model is not easy the location for solving existing one-way exhaust valve, and assembling complicated technology problem provides that a kind of location is simple, the easy lithium ion battery enclosuring structure of assembling.
The utility model provides a kind of lithium ion battery enclosuring structure, comprises cover plate, liquid injection hole on the cover board and the unidirectional relief valve that seals said liquid injection hole are set.
Above-mentioned unidirectional relief valve comprises the upper protruding block that is positioned at cover plate top, the lower protruding block that is snapped in the cover plate bottom and lashing post; Above-mentioned lashing post passes liquid injection hole upper protruding block and lower protruding block is linked together; Upper protruding block comprises and being used for and the contacted sealing of cover plate, and is formed at the avoiding hollow groove between sealing and the lashing post; Leave the space between lashing post and the cover plate, lower protruding block is provided with air discharge duct, and said air discharge duct is connected with said avoiding hollow groove through the space; Wherein, above-mentioned unidirectional relief valve also comprises the lead that is arranged on the lower protruding block bottom.
Further, the bottom of above-mentioned lead is provided with chamfering.
Preferably, the diameter of above-mentioned lead is 45% ~ 75% of a liquid injection hole diameter.
Preferably, above-mentioned upper protruding block is oval spherical cap body, and its top is oval convex body, and sealing and avoiding hollow groove are arranged at the bottom of oval convex body.
Further, the cross section of above-mentioned sealing is circular-arc.
Further, the cross section of above-mentioned avoiding hollow groove is circular-arc.
Further, above-mentioned sealing and avoiding hollow groove are around lashing post.
Preferably, above-mentioned lower protruding block is a hemisphere.
Preferably, the diameter of above-mentioned lashing post is than the little 0.1 ~ 0.3mm of liquid injection hole diameter.
Simultaneously, the utility model has also proposed a kind of lithium ion battery, the lithium ion battery enclosuring structure that this lithium ion battery adopts the utility model to propose.
The lithium ion battery enclosuring structure that uses the utility model to provide not only can be realized the good fit of liquid injection hole on unidirectional relief valve and the battery cover board, and can well guarantee through this unidirectional relief valve the gas of inside battery to be discharged smoothly; Topmost, unidirectional relief valve is provided with lead, can make unidirectional relief valve location more accurately, assembling is easier, saved manpower and materials, practiced thrift cost.
Description of drawings
Fig. 1 is the structural representation of the unidirectional relief valve that provides of the utility model.
Fig. 2 is the lithium ion battery enclosuring structure assembling sectional view that the utility model provides.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 2, a kind of lithium ion battery enclosuring structure comprises cover plate 1, liquid injection hole 2 on the cover board and the unidirectional relief valve 3 that seals said liquid injection hole 2 is set.
As shown in Figure 2, above-mentioned lead 34 is cylinder or conical surface body, and its bottom margin is provided with fillet or chamfering; The setting of this chamfering has strengthened the assembling capacity of unidirectional relief valve 3.In addition, other some cylinder body shapes also are desirable, such as triangle cylinder, polyhedron cylinder or the like.Under general situation, cylindrical cylinder is processed more easily and is installed, and therefore, the utility model has adopted cylindrical lead 34.
As shown in Figure 1, the shape of the upper protruding block 31 preferred mushroom heads of mentioning in the utility model, promptly oval spherical cap body certainly, also can be used the orange lid; Select oval spherical cap body for use, be because its retractility is bigger, and have better sealing property.
In order to guarantee retractility and sealing property, as shown in Figure 2, the top of above-mentioned upper protruding block 31 is an oval convex body, and sealing 35 and avoiding hollow groove 36 all are arranged on the bottom of oval convex body.
As shown in Figure 2, the cross section of sealing 35 is circular-arc, and circular-arc sealing 35 can make upper protruding block 31 and relatively slicker and more sly the combining of cover plate 1, has increased the contact area of upper protruding block 31 with cover plate 1, and has strengthened sealing effectiveness.In addition, can also adopt the structure of other some contact positions, such as the contact of triangle point type.
The cross section of avoiding hollow groove 36 is circular-arc, and is as shown in Figure 2.The existence of avoiding hollow groove 36 can better make inside battery and external environment keep apart.
Above-mentioned cross section all refers to be passed the cross section that the plane of lashing post 33 axis is dissectd out.
As shown in Figure 2, above-mentioned sealing 35 and avoiding hollow groove 36 are all around lashing post 33.
As shown in Figure 2, lower protruding block 32 can be any arcuation body, preferred hemisphere; It cooperates with upper protruding block 31, makes that combine closely in the upper protruding block 31 and the top of cover plate 1, lower protruding block 32 is combined closely with the bottom of cover plate 1.
Theoretically, lower protruding block 32 openings are big more, and intensity is just good more, and the sealing effectiveness that combines with upper protruding block 31 just also can be good more, and tension effect is also just good more; But, consider that lower protruding block 32 passes liquid injection hole 2 and just can be seated, so size can not be excessive, moderate.So, assemble 65% ~ 85% of gravel size decision liquid injection hole 2 diameters of lower protruding block 32 spherical radius easily when effect can be arranged preferably.
As shown in Figure 2, lashing post 33 is directly filled in liquid injection hole 2 between upper protruding block 31 and lower protruding block 32, and its diameter is slightly littler than the diameter of liquid injection hole 2, and leaves certain gap between the liquid injection hole 2.Preferably than the little 0.1 ~ 0.3mm of diameter of liquid injection hole 2, this size can guarantee that gas is discharged to through liquid injection hole 2 in the space between upper protruding block 32 and the cover plate 1 to the diameter of lashing post 33, and can reach good tension effect.
Above-mentioned lithium ion battery enclosuring structure is used in the lithium ion battery, in the effect of playing exhaust and sealing simultaneously, can also better locate and assemble.
Above-mentioned unidirectional relief valve 3 is general to use soft, resilient material, elastomeric material for example, and concrete material uses, and can do corresponding selection according to the different of electrolyte or other demands of different.Elastomeric material, when guaranteeing that internal gas pressure is excessive on the one hand, this structure can realize automatic vent; On the other hand, the diameter of the lower protruding block 32 of unidirectional relief valve 3 is bigger than the diameter of liquid injection hole 2, so, must utilize the elastic characteristic of unidirectional relief valve 3 during installation, could lower protruding block 32 be tucked in the battery through liquid injection holes 2, accomplish the assembling of unidirectional relief valve 3.
As shown in Figure 2, the gas of inside battery can be communicated to through the space between the air discharge duct on the lower protruding block 32 321 and lashing post 33 and the cover plate 1 in the avoiding hollow groove 36 of upper protruding block 31 bottoms; When internal gas pressure is excessive, the gas pressure in the avoiding hollow groove 36 will act on the upper protruding block 31, upper protruding block 31 distortion or mobile because pressure is excessive, and internal gas can be expelled to outside batteries, and unidirectional relief valve 3 is in exhaust condition; When internal pressure was not enough to back down upper protruding block 31, unidirectional relief valve 3 was in closed condition, realized sealing function.Whole exhaust and seal process are regulated through the interaction force of upper protruding block 31 and lower protruding block 32, need not personnel operation, and can accomplish the sealing action after the exhaust automatically.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (10)
1. a lithium ion battery enclosuring structure comprises cover plate, liquid injection hole on the cover board and the unidirectional relief valve that seals said liquid injection hole is set, and it is characterized in that:
Said unidirectional relief valve comprises the upper protruding block that is positioned at cover plate top, the lower protruding block that is snapped in the cover plate bottom and lashing post, and said lashing post passes said liquid injection hole upper protruding block and lower protruding block are linked together; Said upper protruding block comprises and being used for and the contacted sealing of cover plate, and is formed at the avoiding hollow groove between said sealing and the lashing post; Leave the space between said lashing post and the said cover plate, said lower protruding block is provided with air discharge duct, and said air discharge duct is connected with said avoiding hollow groove through said space; Said unidirectional relief valve also comprises the lead that is arranged on the lower protruding block bottom.
2. lithium ion battery enclosuring structure as claimed in claim 1 is characterized in that: the bottom of said lead is provided with chamfering.
3. lithium ion battery enclosuring structure as claimed in claim 1 is characterized in that: the diameter of said lead is 45% ~ 75% of a liquid injection hole diameter.
4. lithium ion battery enclosuring structure as claimed in claim 1 is characterized in that: said upper protruding block is oval spherical cap body, and its top is oval convex body, and said sealing and avoiding hollow groove are located at the bottom of said oval convex body.
5. like claim 1 or 4 described lithium ion battery enclosuring structures, it is characterized in that: the cross section of said sealing is circular-arc.
6. like claim 1 or 4 described lithium ion battery enclosuring structures, it is characterized in that: the cross section of said avoiding hollow groove is circular-arc.
7. like claim 1 or 4 described lithium ion battery enclosuring structures, it is characterized in that: said sealing and avoiding hollow groove are around lashing post.
8. lithium ion battery enclosuring structure as claimed in claim 1 is characterized in that: said lower protruding block is a hemisphere.
9. lithium ion battery enclosuring structure as claimed in claim 1 is characterized in that: the diameter of said lashing post is than the little 0.1 ~ 0.3mm of liquid injection hole diameter.
10. a lithium ion battery is characterized in that, adopts like any described lithium ion battery enclosuring structure of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200155973U CN202454632U (en) | 2012-01-14 | 2012-01-14 | Lithium-ion battery sealing structure and lithium-ion battery thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200155973U CN202454632U (en) | 2012-01-14 | 2012-01-14 | Lithium-ion battery sealing structure and lithium-ion battery thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202454632U true CN202454632U (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200155973U Expired - Fee Related CN202454632U (en) | 2012-01-14 | 2012-01-14 | Lithium-ion battery sealing structure and lithium-ion battery thereof |
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| CN (1) | CN202454632U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413912A (en) * | 2013-07-29 | 2013-11-27 | 宁波慧通新能源科技有限公司 | Sealing device for liquid filling port |
| WO2014048366A1 (en) * | 2012-09-27 | 2014-04-03 | Shenzhen Byd Auto R&D Company Limited | Sealing member and battery comprising the same |
| CN104282863A (en) * | 2013-07-02 | 2015-01-14 | 罗伯特·博世有限公司 | Apparatus and method for increasing the safety during the use of battery systems |
| CN112599899A (en) * | 2020-12-15 | 2021-04-02 | 上海兰钧新能源科技有限公司 | Top cover structure and battery |
-
2012
- 2012-01-14 CN CN2012200155973U patent/CN202454632U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048366A1 (en) * | 2012-09-27 | 2014-04-03 | Shenzhen Byd Auto R&D Company Limited | Sealing member and battery comprising the same |
| CN104282863A (en) * | 2013-07-02 | 2015-01-14 | 罗伯特·博世有限公司 | Apparatus and method for increasing the safety during the use of battery systems |
| CN103413912A (en) * | 2013-07-29 | 2013-11-27 | 宁波慧通新能源科技有限公司 | Sealing device for liquid filling port |
| CN103413912B (en) * | 2013-07-29 | 2015-09-23 | 宁波慧通新能源科技有限公司 | A kind of liquid injection hole sealing device |
| CN112599899A (en) * | 2020-12-15 | 2021-04-02 | 上海兰钧新能源科技有限公司 | Top cover structure and battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20210114 |