CN101237032A - A lithium battery for preventing from liquid leakage and seeping - Google Patents

A lithium battery for preventing from liquid leakage and seeping Download PDF

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Publication number
CN101237032A
CN101237032A CNA2008100650540A CN200810065054A CN101237032A CN 101237032 A CN101237032 A CN 101237032A CN A2008100650540 A CNA2008100650540 A CN A2008100650540A CN 200810065054 A CN200810065054 A CN 200810065054A CN 101237032 A CN101237032 A CN 101237032A
Authority
CN
China
Prior art keywords
cover
shell
lithium battery
block
elastic ring
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.)
Pending
Application number
CNA2008100650540A
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Chinese (zh)
Inventor
陈泽伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHUANGMIN BATTERY TECH Co Ltd SHENZHEN CITY
Original Assignee
CHUANGMIN BATTERY TECH Co Ltd SHENZHEN CITY
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHUANGMIN BATTERY TECH Co Ltd SHENZHEN CITY filed Critical CHUANGMIN BATTERY TECH Co Ltd SHENZHEN CITY
Priority to CNA2008100650540A priority Critical patent/CN101237032A/en
Publication of CN101237032A publication Critical patent/CN101237032A/en
Pending legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention provides a leak-proof liquid and a lithium battery using the same. The lithium battery comprises an outer shell, a winded core, a tab and a cover, wherein the winded core and the cover are in electric connection via the tab and the winded core, the tab and the cover are arranged in the outer shell. The outer shell is provided with a through hole in which the cover is arranged and the cover and the outer shell are sealed together via an elastic ring in between. Because of the sound elasticity performance of the elastic ring between the cover and the outer shell and after the battery is sealed, the elastic ring can fit the clearance between the cover and the outer shell upon the elastic function, which avoids the occurrence of liquid leakage or seepage after the battery is sealed. Because the filling and sealing functions of the elastic ring realizes the ideal sealing effect by adding glue in the prior art and the cover sealing saves the link of adding glue, the production technology is simplified and the production cost is reduced.

Description

The lithium battery of a kind of anti-leakage and seepage-proof liquid
Technical field
The present invention relates to a kind of lithium battery, relate in particular to the lithium battery of a kind of anti-leakage and seepage-proof liquid.
Background technology
Along with science and technology is constantly progressive, the lithium battery manufacturing process technology is more and more ripe, but at home, lithium battery technology relatively lags behind, and particularly for some medium-sized and small enterprises, lacks qualified technical personnel, and some technical bottleneck may be fatal to its influence sometimes.The most typical example is exactly the sealing tech of cylindrical battery.Sealing mode at present commonly used has mould to seal and revolves and seals two kinds.These two kinds of sealing operations are simple, but because the restriction of equipment and material, contact firmly between shell wall and the cover plate, can form certain slit, and people smear one deck glue usually and seal (being called dotting glue method) between the slit before sealing.Adopt this measure to prevent battery leakage, sealing effectiveness is relatively poor, and leakage and sepage problem are of common occurrence.
Summary of the invention
The technical problem to be solved in the present invention is that the good anti-leakage of a kind of sealing effectiveness and the lithium battery of seepage-proof liquid are provided.
In order to solve the problems of the technologies described above, the invention provides the lithium battery of a kind of anti-leakage and seepage-proof liquid, comprise shell, volume core, lug and block, electrically connect by lug between volume core and the block, volume core, lug and block are positioned at shell.Have through hole on the shell, block is arranged in this through hole, is tightly connected by elastic ring between block and the shell.
Owing to have elastic performance better elastic ring between block and the shell, behind the battery seal, elastic ring is by the elastic reaction of self, the gap between block and shell is well filled, and prevented the appearance of leakage behind the battery seal or sepage problem.Because the filling sealing function of elastic ring has realized that prior art mid point glue will reach the ideal effect of sealing, and block a shot and saved some glue link before sealing, like this, simplified production technology, reduced production cost.
Description of drawings
Fig. 1 is a kind of anti-leakage that provides of the embodiment of the invention and the lithium battery structure schematic diagram of seepage-proof liquid.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, the embodiment of the invention provides the lithium battery of a kind of anti-leakage and seepage-proof liquid, and it comprises shell 1, volume core 2, lug 3 and block a shot 4, electrically connects by lug 3 between volume core 2 and the block 4, rolls up core 2, lug 3 and block a shot 4 to be positioned at shell 1.Shell 1 has through hole 11, and block 4 is arranged in this through hole 11, is tightly connected by elastic ring 14 between block 4 and the shell 1.
Particularly, above-mentioned block 4 comprises top cover 41, pad 42 and safety valve 43.Have several air vent holes on the top cover 41, top cover 41 has horizontal cage 412, and along vertically being extended with boss 411 on the mediad of cage 412, this boss 411 passes through hole 11 and its part is exposed to outside shell 1 surface, and cage 412 is positioned at the cavity of shell 1.Safety valve 43 is positioned at the bottom of top cover 41, is provided with pad 42 between top cover 41 and the safety valve 43, and pad 42 is a ring-type, and the material of this pad 42 adopts nickel in the present embodiment.
Can also be connected by positive temperature coefficient terminal (PTC) between top cover 41 and the safety valve 43.When short circuit appears in battery, cause inside battery generation side reaction, internal temperature of battery constantly raises, and the internal resistance of PTC is along with the also sharply increase of rising of temperature, when arriving on the PTC design temperature, temperature prescribes a time limit, PTC internal resistance maximum, and this moment, short circuit current became very little, so just reach the carrying out of effective prevention side reaction, thereby prevent that battery from blasting.
Safety valve 43 comprises last sheet metal 432 and the less following sheet metal 431 of external diameter that external diameter is bigger; there is the ring-type indentation on the surface of wherein going up sheet metal 432; there are several gas ports on the surface of following sheet metal 431; on; following sheet metal 432; link together by laser spot welding between 431; when the generation of the electrolyte in the battery roll core 2 gas pressure reaches 8-15kg; gases at high pressure disconnect the last sheet metal 432 of safety valve 43 with following sheet metal 431; realize power-off protection; when air pressure during up to 18-25kg; ring-type indentation on the safety valve parts 432 breaks; gas is discharged along the air vent hole of top cover 41, thereby the protection battery can not blasted.
Elastic ring 14 is for having the colloid of favorable elasticity, and this colloid composition is ethylene propylene diene rubber, MODIFIED PP (polypropylene) etc.Elastic ring 14 is a column in the present embodiment, its inside has cavity, and the upper and lower surface of elastic ring 14 has through hole respectively, and this through hole communicates with the through hole 11 of shell 1, cage 412, pad 42 and safety valve 43 are wrapped in the cavity of elastic ring 14, block 4 and shell 1 are tightly connected.Elastic ring 14 can also be other shapes, as long as block 4 and shell 1 are tightly connected all within protection scope of the present invention.
Owing to have elastic performance better elastic ring 14 between block 4 and the shell 1, behind the battery seal, elastic ring 14 is by the elastic reaction of self, and the gap of 1 on block 4 and shell well filled, and so just prevented the appearance of leakage behind the battery seal or sepage problem.Because the filling sealing function of elastic ring 14 has realized that prior art mid point glue will reach the ideal effect of sealing, and block a shot and 4 saved some glue link before sealing, like this, simplified production technology, reduced production cost.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1, the lithium battery of a kind of anti-leakage and seepage-proof liquid, comprise shell, volume core, lug and block, electrically connect by lug between described volume core and the block, described volume core, lug and block are positioned at described shell, has through hole on the described shell, described block is arranged in the described through hole, it is characterized in that: be tightly connected by elastic ring between described block and the shell.
2, the lithium battery of anti-leakage as claimed in claim 1 and seepage-proof liquid is characterized in that: described elastic ring is a column, and its inside has cavity, and elastomeric upper and lower surface has through hole respectively, and described block is positioned at the cavity of described elastic ring.
3, the lithium battery of anti-leakage as claimed in claim 1 and seepage-proof liquid, it is characterized in that: described block comprises top cover and safety valve, and described top cover is arranged in the described through hole, and described safety valve is positioned at the bottom of described top cover, and described safety valve is connected with lug.
4, the lithium battery of anti-leakage as claimed in claim 3 and seepage-proof liquid, it is characterized in that: described safety valve comprises sheet metal and following sheet metal, described going up on the sheet metal has indentation, and described have several gas ports on the sheet metal down, and described lug is connected with the bottom surface of following sheet metal.
5, the lithium battery of anti-leakage as claimed in claim 3 and seepage-proof liquid is characterized in that: have air vent hole on the described top cover.
6, as the lithium battery of each described anti-leakage of claim 3-5 and seepage-proof liquid, it is characterized in that: be provided with pad between described top cover and the safety valve.
7, as the lithium battery of each described anti-leakage of claim 3-5 and seepage-proof liquid, it is characterized in that: be provided with the positive temperature coefficient terminal between described top cover and the safety valve.
CNA2008100650540A 2008-01-14 2008-01-14 A lithium battery for preventing from liquid leakage and seeping Pending CN101237032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100650540A CN101237032A (en) 2008-01-14 2008-01-14 A lithium battery for preventing from liquid leakage and seeping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100650540A CN101237032A (en) 2008-01-14 2008-01-14 A lithium battery for preventing from liquid leakage and seeping

Publications (1)

Publication Number Publication Date
CN101237032A true CN101237032A (en) 2008-08-06

Family

ID=39920473

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2008100650540A Pending CN101237032A (en) 2008-01-14 2008-01-14 A lithium battery for preventing from liquid leakage and seeping

Country Status (1)

Country Link
CN (1) CN101237032A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005617A (en) * 2009-08-28 2011-04-06 比克国际(天津)有限公司 Lithium-dynamic battery capable of avoiding gas inflation
WO2019179526A1 (en) * 2018-03-23 2019-09-26 Chongqing Jinkang New Energy Vehicle Co., Ltd. Battery cell for electric vehicle battery pack
WO2020048155A1 (en) * 2018-03-23 2020-03-12 Chongqing Jinkang New Energy Vehicle Co., Ltd. Battery cell for electric vehicle battery pack

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005617A (en) * 2009-08-28 2011-04-06 比克国际(天津)有限公司 Lithium-dynamic battery capable of avoiding gas inflation
WO2019179526A1 (en) * 2018-03-23 2019-09-26 Chongqing Jinkang New Energy Vehicle Co., Ltd. Battery cell for electric vehicle battery pack
WO2020048155A1 (en) * 2018-03-23 2020-03-12 Chongqing Jinkang New Energy Vehicle Co., Ltd. Battery cell for electric vehicle battery pack
US10734620B2 (en) 2018-03-23 2020-08-04 Chongqing Jinkang New Energy Vehicle Co., Ltd. Battery cell for electric vehicle battery pack
CN111527617A (en) * 2018-03-23 2020-08-11 重庆金康新能源汽车有限公司 Battery cell for an electric vehicle battery pack
CN111527617B (en) * 2018-03-23 2021-11-05 重庆金康新能源汽车有限公司 Battery cell for an electric vehicle battery pack

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Open date: 20080806