CN201191623Y - Battery assembling cap and cylindrical lithium ionic cell produced by using the same - Google Patents
Battery assembling cap and cylindrical lithium ionic cell produced by using the same Download PDFInfo
- Publication number
- CN201191623Y CN201191623Y CNU2007201702134U CN200720170213U CN201191623Y CN 201191623 Y CN201191623 Y CN 201191623Y CN U2007201702134 U CNU2007201702134 U CN U2007201702134U CN 200720170213 U CN200720170213 U CN 200720170213U CN 201191623 Y CN201191623 Y CN 201191623Y
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- CN
- China
- Prior art keywords
- battery
- egative film
- welded
- cap
- crown 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
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a battery combination nut cap, which comprises a bottom plate which is made of metal, an upper plate with a top cap and a sealing casing, wherein a metal ring is arranged between the bottom plate and the upper plate with a top cap, the lower portion of the bottom plate is provided with an explosion-proof plate, and the bottom plate, the metal ring, the upper plate with the top cap and the explosion-proof plate are respectively and mutually welded together and are thermally pressed to be mounted in the sealing casing. The utility model further provides a cylindrical lithium ion cell which is made of the battery combination cap. The utility model has the advantages that compared with traditional nut caps which are not welded and contact together only through the pressure of a sealing hole, the battery combination nut cap lowers the resistance of the nut cap, the sealing hole has little influence to the internal resistance of an end product battery, and the internal resistance of a battery has excellent consistency. In the cyclic process of charging and discharging of batteries, the battery combination nut cap can keep the stability of the internal resistance of batteries in the cyclic process of charging and discharging, thereby improving the electrochemical property and cycle life of batteries.
Description
Technical field
The utility model relates to the battery manufacturing technology, particularly a kind of battery combination block and the cylindrical lithium ion battery that adopts this combination cover cap to make.
Background technology
Reduce the internal resistance of lithium ion battery, the heat that can reduce in the charge and discharge process produces, and reduces the generation of polarization simultaneously, thereby can improve the energy conversion efficiency of battery, obtains maximum energy content of battery output.In actual application, can take following measure to reach the purpose that reduces the internal resistance of cell: 1. the conductivity that improves battery material; 2. the manufacture craft of adjusting both positive and negative polarity is to obtain pole piece with minimum resistance; 3. reasonably design battery process; 4. reduce the contact resistance between each parts of battery.Be directed to cylindrical battery, battery cap resistance occupies certain proportion in the overall internal resistance of battery, so the resistance that reduces to block a shot can directly reduce the internal resistance of battery.At present the metal assembly of block commonly used comprises a circular aluminium matter egative film that has blast resistance construction, a nickel ring and a band crown cap annular last slice, after each parts combine in order, be fixed together by the peripheral seal shell.Its shortcoming is that the contact resistance between each parts is bigger.Though, behind the battery seal, being subjected to sealing the effect of pressure, each metal parts can better must contact, and block resistance is reduced; But the battery seal situation is influence block resistance directly: seal battery preferably, each metal parts of block is subjected to the pressure of homogeneous, and resistance is less, and the internal resistance of cell descends to some extent; Seal battery in bad order, the pressure that each metal parts of blocking a shot is subjected to can change, and resistance is bigger, and the internal resistance of cell just increases to some extent, thereby, cause the internal resistance of cell to have bigger individual difference.Simultaneously, because battery is in the heavy-current discharge use, having more heat produces, present widely used polypropylene capsul is temperature distortion easily in this process, cause the contact force between each metal parts of block to reduce, block resistance increases, and the internal resistance of cell increases, have a strong impact on battery performance, battery cycle life shortens.
The utility model content
The purpose of this utility model is to overcome the defective that existing technology exists, provide a kind of block resistance little, the homogeneity and the stability that can keep battery internal resistance in the heavy-current discharge use, electrochemistry and the battery combination block of cycle performance and the cylindrical lithium ion battery that adopts this combination cover cap to make of raising battery.
For achieving the above object, the battery combination block that the utility model provides, comprise metal egative film, band crown cap last slice and capsul, described egative film and described band crown cap last slice be welded to each other together also hot pressing and be installed in the described capsul.
The utility model battery combination block, wherein said egative film and described band crown cap last slice between be welded with becket.
The utility model battery combination block, wherein said egative film bottom is provided with burst disk, and described burst disk and described egative film are welded to each other together.
The utility model also provides cylindrical lithium ion battery, comprise block, described block adopts battery combination block, described battery combination block comprise metal egative film, band crown cap last slice and capsul, described egative film and described band crown cap last slice be welded to each other together also that hot pressing is installed in the described capsul.
The utility model cylindrical lithium ion battery, wherein said egative film and described band crown cap last slice between be welded with becket.
The utility model cylindrical lithium ion battery, wherein said egative film bottom is provided with burst disk, and described burst disk and described egative film are welded to each other together.
The utility model battery combination block and adopt the advantage of the cylindrical lithium ion battery that this combination cover cap makes to be: do not weld with tradition, only rely on and seal the capping structure that pressure contacts and compare, reduced block resistance, the situation of sealing is little to the influence of the finished product internal resistance of cell, and the internal resistance of cell has consistency preferably; The more important thing is, in the battery charging and discharging cyclic process, even produce more heat, the capsul temperature distortion, significant change can not take place in block resistance yet, can not cause the internal resistance of cell must improve significantly, can keep the stability of the internal resistance of cell in the charge and discharge cycles process, thereby improve the chemical property and the cycle life of battery.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, in the hope of the purpose of this utility model, feature and advantage are obtained more deep understanding.
Description of drawings
Fig. 1 is the structure chart of the utility model battery combination block.
Embodiment
The technical scheme that its technical problem that solves the utility model adopts is: have the egative film of blast resistance construction, becket (also can omit) and band crown cap last slice weld together mutually, form the finished product block with capsul.Can also add an explosion-protection equipment in addition, be about to weld a metal burst disk more in addition under the egative film.
Referring to Fig. 1, among the figure: 1-has the egative film of blast resistance construction, the 2-becket, 3-band crown cap last slice, 4-burst disk, 5-capsul.Specify as follows:
The battery combination block that the utility model provides comprise metal egative film 1, band crown cap last slice 3 and capsul 5, described egative film 1 and described band crown cap last slice 3 be welded to each other together and hot pressing is installed in the described capsul 5.Described egative film 1 and described band crown cap last slice be provided with becket 2 between 3, described egative film 1, becket 2 and band crown cap last slice 3 be welded to each other together.Described egative film bottom is provided with burst disk 4, and described burst disk 4 is welded to each other together with described egative film 1.
Embodiment can be divided into following three kinds:
Embodiment one, and last slice 3 three parts that will have egative film 1, becket 2 and the band crown cap of blast resistance construction combine and be welded together to form metal assembly successively; Again capsul 5 combinations are hot-pressed onto outside this metal assembly, weld burst disk 4 at last, form the finished product block.
Embodiment two, last slice 3 three parts that will have egative film 1, becket 2 and the band crown cap of blast resistance construction are placed in the capsul 5 successively, and three metal partss are welded together, and capsul 5 are hot-pressed onto outside this metal assembly again, weld burst disk 4 at last, form the finished product block.
Embodiment three, after the egative film 1 that will have a blast resistance construction and capsul 5 combinations, burst disk 4 and egative film 1 are welded together, after with its with becket 2 and be with crown cap last slice 3 weld together; Hot repressing capsul 5 forms the finished product block.
In each embodiment, becket 2 can omit, and also can not add burst disk 4.
The utility model also provides the cylindrical lithium ion battery that adopts above-mentioned battery combination block to make.Cylindrical lithium ion battery comprises battery combination block, battery combination block comprise metal egative film 1, band crown cap last slice 3 and capsul 5, egative film 1 and band crown cap last slice 3 be welded to each other together and hot pressing is installed in the capsul 5.Egative film 1 and band crown cap last slice be welded with becket 2 between 3.Egative film 1 bottom is provided with burst disk 4, and burst disk 4 is welded to each other together with egative film 1.
Be example with 18650 type lithium-ion-power cells below, illustrate and use this kind block and the difference of using traditional battery performance of blocking a shot.
Adopt 18650 type lithium ion battery internal resistances of tradition block assembling to have certain fluctuation, it is bigger that the internal resistance of cell is subjected to sealing the situation influence.And for the bigger battery of internal resistance, after the high current charge-discharge circulation, the internal resistance meeting sharply increases, and directly influences the cycle life of battery.This mainly be because, the heat that produces in the battery charging and discharging cyclic process can change the shape of capsul, causes the contact strength of block between each metal parts to change, the block contact resistance increases, the internal resistance of cell sharply increases, and battery performance descends, and cycle life shortens.Adopt the size battery of the same race of the utility model assembling, the internal resistance of cell has consistency preferably.Simultaneously, after the high current charge-discharge circulation, the internal resistance of cell does not change substantially, and this and its spot-welded structures has direct relation.Because each metal parts welds together, in battery operated process, even capsul deforms, each metal parts of blocking a shot remains firm and must weld together, significant change can not take place in its resistance, the internal resistance of cell also can remain unchanged substantially, and battery performance is more stable, and cycle life prolongs.
Claims (6)
1. battery combination block, comprise last slice (3) and the capsul (5) of metal egative film (1), band crown cap, it is characterized in that: last slice (3) of described egative film (1) and described band crown cap are welded to each other together also hot pressing and are installed in the described capsul (5).
2. battery combination block according to claim 1 is characterized in that: be welded with becket (2) between last slice (3) of described egative film (1) and described band crown cap.
3. battery combination block according to claim 1 and 2 is characterized in that: wherein said egative film (1) bottom is provided with burst disk (4), and described burst disk (4) is welded to each other together with described egative film (1).
4. cylindrical lithium ion battery, comprise block, it is characterized in that: described block adopts battery combination block, described battery combination block comprises last slice (3) and the capsul (5) of metal egative film (1), band crown cap, and last slice (3) of described egative film (1) and described band crown cap are welded to each other together also hot pressing and are installed in the described capsul (5).
5. cylindrical lithium ion battery according to claim 4 is characterized in that: be welded with becket (2) between last slice (3) of described egative film (1) and described band crown cap.
6. according to claim 4 or 5 described cylindrical lithium ion batteries, it is characterized in that: wherein said egative film (1) bottom is provided with burst disk (4), and described burst disk (4) is welded to each other together with described egative film (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201702134U CN201191623Y (en) | 2007-08-15 | 2007-08-15 | Battery assembling cap and cylindrical lithium ionic cell produced by using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201702134U CN201191623Y (en) | 2007-08-15 | 2007-08-15 | Battery assembling cap and cylindrical lithium ionic cell produced by using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191623Y true CN201191623Y (en) | 2009-02-04 |
Family
ID=40335786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201702134U Expired - Lifetime CN201191623Y (en) | 2007-08-15 | 2007-08-15 | Battery assembling cap and cylindrical lithium ionic cell produced by using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201191623Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800296A (en) * | 2010-03-16 | 2010-08-11 | 周卫炳 | Explosion-proof combined block of high-rate cylindrical lithium ion battery |
| CN101916833A (en) * | 2010-08-20 | 2010-12-15 | 芜湖根源科技有限公司 | Explosion-proof cover cap of lithium battery |
| CN102097604A (en) * | 2011-01-18 | 2011-06-15 | 杨福如 | Lithium ion battery cover cap |
| CN109659624A (en) * | 2018-12-21 | 2019-04-19 | 天津市远程新能源科技有限公司 | A kind of lithium battery and its manufacture craft of fire resisting |
-
2007
- 2007-08-15 CN CNU2007201702134U patent/CN201191623Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800296A (en) * | 2010-03-16 | 2010-08-11 | 周卫炳 | Explosion-proof combined block of high-rate cylindrical lithium ion battery |
| CN101916833A (en) * | 2010-08-20 | 2010-12-15 | 芜湖根源科技有限公司 | Explosion-proof cover cap of lithium battery |
| CN102097604A (en) * | 2011-01-18 | 2011-06-15 | 杨福如 | Lithium ion battery cover cap |
| CN109659624A (en) * | 2018-12-21 | 2019-04-19 | 天津市远程新能源科技有限公司 | A kind of lithium battery and its manufacture craft of fire resisting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: UNIPOWER BATTERY LTD. Free format text: FORMER OWNER: HUANYU GROUP CO., LTD., HENAN Effective date: 20110315 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 453002 SANLIQIAO, HUANYU AVENUE, XINXIANG CITY, HE'NAN PROVINCE TO: 100020 26/F, BLOCK A, NORTH TOWER, SOHO SHANGDU, NO. 8, DONGDAQIAO ROAD, CHAOYANG DISTRICT, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110315 Address after: 100020 Beijing city Chaoyang District East Bridge Road No. 8, block A 26 layer SOHO Patentee after: Beijing universal Amperex Technology Limited Address before: Three 453002 Mile Bridge, Huanyu Road, Henan, Xinxiang Patentee before: Huanyu Group Co., Ltd., Henan |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090204 |