CN202616300U - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- CN202616300U CN202616300U CN2011205387262U CN201120538726U CN202616300U CN 202616300 U CN202616300 U CN 202616300U CN 2011205387262 U CN2011205387262 U CN 2011205387262U CN 201120538726 U CN201120538726 U CN 201120538726U CN 202616300 U CN202616300 U CN 202616300U
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- China
- Prior art keywords
- pole piece
- secondary cell
- perforation
- barrier film
- anode
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- 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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Abstract
The utility model discloses a secondary battery comprising an outer shell and a positive pole piece and a negative pole piece contained in the outer shell, and an isolation membrane spaced between the two pole pieces, wherein registration hole is formed in the first pole piece in the two pole pieces, a through hole which is not aligned to the registration hole of the first pole piece is formed in the second pole piece, a registration column adaptive to the registration hole of the first pole piece and a stand column adaptive to the through hole of the second pole piece are arranged on the outer shell, the registration column passes through the registration hole of the first pole piece to position the first pole piece, and the stand column passes through the through hole of the second pole piece to position the second pole piece. According to the secondary battery disclosed by the utility model, the columns are utilized for realizing the positioning of the negative and positive pole pieces and the isolation membrane on the outer shell, once the battery core is assembly, the battery can be tightly fixed with the outer shell, and further the battery and the outer shell can not move relatively, so that the mutual dislocation and the mutual deformation of the negative and positive pole pieces and the isolation membrane can be avoided, and the constantly good interface of the pole pieces can be ensured.
Description
Technical field
The utility model relates to a kind of secondary cell, especially a kind of Stability Analysis of Structures, safe secondary cell.
Background technology
Enhancing along with development of modern society and environmental consciousness; More and more equipments is selected with chargeable secondary cell as power supply; Like mobile phone, notebook computer, electric tool, electric automobile or the like, especially electric automobile and energy-storage system etc. need jumbo secondary cell especially.This provides wide space for the application of chargeable secondary cell and development, also secondary cell is had higher requirement simultaneously, needs secondary cell can have higher capacity, long cycle life, also must have good fail safe.
The electric core of the secondary cell that uses at present is square bar/aluminum hull electricity core mostly, and naked electric core generally is to be formed by the rectangle pole piece coiling.But coiling can cause risk to naked electric core, as the dislocation of anode and cathode slice and barrier film, winding tension problem cause that electric core in use is out of shape, the interface variation of pole piece in cyclic process etc.In addition; The current naked electric core and the connected mode of shell are through the lug of anode and cathode slice and external circuit joint weld together; Therefore naked electric core has certain activity space in the enclosure; Can't guarantee that naked electric core and shell can be because of exterior vibration do not produce relative displacement, also be difficult to avoid anode and cathode slice and the barrier film of naked electric core to misplace even be out of shape, so that cause safety problems such as battery failure even short circuit because of vibrations.
In view of this, necessary a kind of constitutionally stable secondary cell is provided.
The utility model content
The purpose of the utility model is: a kind of constitutionally stable secondary cell is provided, to improve the fail safe of battery.
In order to realize the foregoing invention purpose; The utility model provides a kind of secondary cell; It comprises shell body and is housed in two kinds of pole pieces of negative and positive in the shell body, is interval in two kinds of barrier films between the pole piece; Offer registration holes on first kind of pole piece in two kinds of pole pieces; Offer the perforation that the registration holes with first kind of pole piece does not line up on second kind of pole piece, shell body be provided with the suitable contraposition post of the registration holes of first kind of pole piece and with the suitable column of the perforation of second kind of pole piece, the contraposition post pass first kind of pole piece registration holes and with first kind of pole piece location; Column passes the perforation of second kind of pole piece and second kind of pole piece is located; Offer with the corresponding registration holes of the registration holes of first kind of pole piece on the barrier film or offer and the corresponding perforation of the perforation of second kind of pole piece, or offer registration holes and perforation simultaneously, thereby by contraposition post or column or by the two co.
A kind of improvement as the utility model secondary cell; Said shell body comprises base and top cover; Contraposition post and column are to be fixed in the solid of base or top cover or hollow metal post; The two uses respectively the two poles of the earth are led to the electrode leads to client of base and top cover as lug, and other parts of base and top cover are then processed by insulating material.
A kind of improvement as the utility model secondary cell; Said perforation is opened in the middle part of second kind of pole piece; Offer on first kind of pole piece with the perforation of second kind of pole piece is corresponding but the perforation that diameter is bigger, can not contact during perforation that column passes first kind of pole piece with first kind of pole piece.
A kind of improvement as the utility model secondary cell; Said registration holes is opened in the edge of first kind of pole piece; The edge of second kind of pole piece does not extend to the corresponding position, registration holes position with first kind of pole piece, can not touch second kind of pole piece during registration holes that the contraposition post passes first kind of pole piece.
A kind of improvement as the utility model secondary cell; Also offer the connecting hole spaced apart on said first kind of pole piece with registration holes; Offer on the barrier film and the corresponding connecting hole of the connecting hole of first kind of pole piece; Shell body is provided with the suitable joint pin of connecting hole with first kind of pole piece and barrier film; The edge of second kind of pole piece does not extend to the corresponding position, connecting hole position with first kind of pole piece, and joint pin can not touch second kind of pole piece when passing the connecting hole of first kind of pole piece and barrier film.
As a kind of improvement of the utility model secondary cell, said cathode sheets, anode strip, barrier film all are selected from a kind of in circle, square, the ellipse respectively.
As a kind of improvement of the utility model secondary cell, said first kind of pole piece is anode strip, and second kind of pole piece is cathode sheets, and column is the aluminium post, and the contraposition post is the copper post.
As a kind of improvement of the utility model secondary cell, said cathode sheets, anode strip and barrier film all are annular, and the external diameter of barrier film is more than or equal to the external diameter of cathode sheets, and the while is more than or equal to the external diameter of anode strip.
As a kind of improvement of the utility model secondary cell, the hole of the same race on said anode and cathode slice and the barrier film is for being symmetrically distributed.
As a kind of improvement of the utility model secondary cell, said anode and cathode slice all comprises collector respectively and is coated on the diaphragm on the collector, on the anode and cathode slice the porose non-district of filming that all is opened in uncoated diaphragm on its collector.
Compared with prior art; The utility model secondary cell utilizes cylinder to realize anode and cathode slice and the location of barrier film on shell body; The electricity core can not produce any relative displacement each other in case assembling promptly can closely be fixed with shell body; Therefore can avoid the mutual dislocation and the problem on deformation of anode and cathode slice and barrier film fully, and can guarantee that the pole piece interface is good all the time.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, the utility model secondary cell and useful technique effect thereof are elaborated.
Fig. 1 is the anode strip structural representation of the utility model secondary cell.
Fig. 2 is the barrier film structural representation of the utility model secondary cell.
Fig. 3 is the cathode sheets structural representation of the utility model secondary cell.
Fig. 4 is the electric core cross-sectional schematic of the utility model secondary cell.
Fig. 5 is the understructure perspective view of the utility model secondary cell.
Fig. 6 is the base schematic top plan view of the utility model secondary cell.
Fig. 7 is the cap structure perspective view of the utility model secondary cell.
Fig. 8 is the top cover elevational schematic view of the utility model secondary cell.
Embodiment
See also Fig. 1 to Fig. 8, the utility model secondary cell comprises anode strip 10, barrier film 20, cathode sheets 30 and shell body.
See also Fig. 1; The shape of anode strip 10 and CD are approximate; It comprises circular anode collector 12, is coated on the circular anode diaphragm 14 on the anode collector 12; And the anode perforation 16 that is positioned at anode collector 12 middle parts, the peripheral portion of anode collector 12 is divided into the non-district 120 of filming of uncoated anode diaphragm 14, spaced apart less anode registration holes 122 and the bigger anode connecting hole 124 of being provided with in the non-district 120 of filming.In illustrated embodiment, anode collector 12 is a Copper Foil.
See also Fig. 2, the shape of barrier film 20 and anode collector 12 are basic identical, and external diameter is then more than or equal to the external diameter of anode strip 10.The center of barrier film 20 is barrier film perforation 22, and outward flange is less barrier film registration holes 24 and bigger barrier film connecting hole 26, and wherein, the diameter of barrier film perforation 22 is less than or equal to the diameter of anode strip perforation 16.
See also Fig. 3, the shape of cathode sheets 30 also is an optical disc shapes, and it comprises hollow cathode collector 32, is coated on the hollow cathode diaphragm 34 on the cathode current collector 32, and the negative electrode perforation 36 that is positioned at cathode current collector 32 middle parts.The internal diameter of cathode current collector 32 and external diameter are all less than anode collector 12, and the external diameter of external diameter and anode diaphragm 14 is basic identical or smaller.The internal diameter of negative electrode diaphragm 34 and external diameter are all basic identical with anode diaphragm 14, so the inner edge portion of cathode current collector 32 is divided into the non-district 320 of filming of uncoated negative electrode diaphragm 34.In illustrated embodiment, cathode current collector 32 is an aluminium foil.
See also Fig. 5 to Fig. 8, shell body comprises base 42 and top cover 44, and wherein, base 42 comprises circular base plate 46 and the 46 upwardly extending sidewalls 48 from the chassis.The center on chassis 46 is provided with the column 420 suitable with the perforation of cathode sheets 30 36; The edge then is provided with the contraposition post 422 corresponding and suitable with anode registration holes 122; And diameter corresponding with anode connecting hole 124 is less than the joint pin 424 of anode connecting hole 124; All cylinders on the chassis 46 can be chosen as solid cylinder or hollow cylinder as required, and the end of contraposition post 422 46 is exposed and used as anode exit 426 from the chassis.Also be provided with respectively contraposition post 422 and joint pin 424 corresponding contraposition posts 442 and joint pins 444 with chassis 46 on the top cover 44, the core of top cover 44 is the cathode end 446 that conductor material is processed.Except that each cylinder harmonizing yinyang utmost point exit is the metal, other parts of shell body are insulating material, can effectively avoid being used to drawing short circuit between the different cylinders of anode and cathode, and each cylinder is connected on the shell body through welding or riveted way.Wherein, column 420 is the aluminium post, and contraposition post 422,442 is the copper post.
See also Fig. 4; During assembling; Anode strip 10, barrier film 20, cathode sheets 30 are put into base 42 stacks successively according to the order of " single face anode strip-barrier film-two-sided cathode sheets-barrier film-two-sided anode strip ... two-sided anode strip-barrier film-two-sided cathode sheets-barrier film-single face anode strip "; Note when putting into anode perforation 16, barrier film perforation 22 and negative electrode perforation 36 all are enclosed within on the column 420 of base 42; Anode connecting hole 124 and barrier film connecting hole 26 are inserted on the joint pin 424, anode registration holes 122 and barrier film registration holes 24 are enclosed within on the contraposition post 422 of base 42, the number of plies of concrete stack can be according to the design parameter adjustment of secondary cell; Utilize the space between joint pin 424 and the anode strip 10 after stack is good, the anode strip between different layers 10 is connected to one through welding or riveted way; Afterwards with the contraposition post of top cover 44 442 and joint pin 444 with after the contraposition post 422 on chassis 46 aligns with joint pin 424, top cover 44 is welded on the base 42, realize sealing.
Can know that in conjunction with Fig. 4 to Fig. 8 the inward flange of the cathode sheets 30 after assembling contacts with the column 420 of base 42 and leads to the cathode end 446 of top cover 44 by it, the position of cathode sheets 30 is also fixed by column 420 simultaneously; The position of anode strip 10 and barrier film 20 is then fixed by contraposition post 422 and joint pin 424, and anode strip 10 also leads to the anode exit 426 on chassis 46 through contraposition post 422; Obviously, because the external diameter of cathode sheets 30 is less, so it can not contact the just anode that contraposition post 422 is drawn to some extent with contraposition post 422; Again since the diameter of anode perforation 16 greater than the diameter of negative electrode perforation 36, so the center-aligned of the two fixing after, column 420 can only contact with cathode sheets 30 inward flanges, and can't contact to some extent with anode strip 10, so what draw is negative electrode.
In other embodiments, the shape of anode and cathode slice can be exchanged, and promptly utilizes column 420 to be connected with anode strip 10 and draws anode, utilizes contraposition post 422 to be connected with cathode sheets 30 and draws negative electrode; Also can not establish connecting hole 24 and registration holes 26 on the barrier film 20, but adopt other modes to reserve connecting hole 124 and registration holes 122 corresponding spaces with anode strip 10; The shape of anode strip 10, cathode sheets 30 and barrier film 20 also can not be circular, but square, oval or other are abnormally-structured.
Compared with prior art; The anode and cathode slice of the utility model secondary cell and barrier film are implemented in the location on the shell body through closely cooperating of respective aperture and cylinder; Can guarantee that on the one hand battery is not in use between pole piece and the pole piece, can produce relative displacement between electric core and the housing; Improve the structural stability of battery, farthest reduced potential safety hazard; This structure can make resistance reduce to greatest extent on the other hand, and current density is more even, and the demand of the big multiplying power discharging of suitable batteries more is for electric tool provides more powerful motivation; The utility model is simple in structure, and is easy to assembly, also meets the requirement of notion battery.
In addition, in the manufacturing process of conventional lamination technology battery, all need soldering polar ear on each anode strip and the cathode sheets; The utility model directly piles up cathode sheets, anode strip and barrier film; Play lug and fixing effect through column and contraposition post, saved the step of soldering polar ear, novel structure; Simple to operate, and resistance is little.
According to the announcement and the instruction of above-mentioned specification, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to is in the protection range of the claim that also should fall into the utility model to some modifications and the change of the utility model.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (1)
1. secondary cell; Comprise shell body and be housed in two kinds of pole pieces of negative and positive in the shell body, be interval in two kinds of barrier films between the pole piece; It is characterized in that: offer registration holes on first kind of pole piece in two kinds of pole pieces; Offer the perforation that the registration holes with first kind of pole piece does not line up on second kind of pole piece; Shell body be provided with the suitable contraposition post of the registration holes of first kind of pole piece and with the suitable column of the perforation of second kind of pole piece; The contraposition post passes the registration holes of first kind of pole piece and with first kind of pole piece location, column passes the perforation of second kind of pole piece and with second kind of pole piece location, offers with the corresponding registration holes of the registration holes of first kind of pole piece on the barrier film or offer and the corresponding perforation of the perforation of second kind of pole piece; Or offer registration holes and perforation simultaneously, by contraposition post or column or by the two co.
2. secondary cell according to claim 1; It is characterized in that: said shell body comprises base and top cover; Contraposition post and column are to be fixed in the solid of base or top cover or hollow metal post; The two uses respectively the two poles of the earth are led to the electrode leads to client of base and top cover as lug, and other parts of base and top cover are then processed by insulating material.
3. secondary cell according to claim 1; It is characterized in that: said perforation is opened in the middle part of second kind of pole piece; Offer on first kind of pole piece with the perforation of second kind of pole piece is corresponding but the perforation that diameter is bigger, can not contact during perforation that column passes first kind of pole piece with first kind of pole piece.
4. secondary cell according to claim 1; It is characterized in that: said registration holes is opened in the edge of first kind of pole piece; The edge of second kind of pole piece does not extend to the corresponding position, registration holes position with first kind of pole piece, can not touch second kind of pole piece during registration holes that the contraposition post passes first kind of pole piece.
5. secondary cell according to claim 1; It is characterized in that: also offer the connecting hole spaced apart on said first kind of pole piece with registration holes; Offer on the barrier film and the corresponding connecting hole of the connecting hole of first kind of pole piece; Shell body is provided with the suitable joint pin of connecting hole with first kind of pole piece and barrier film; The edge of second kind of pole piece does not extend to the corresponding position, connecting hole position with first kind of pole piece, and joint pin does not contact with second kind of pole piece when passing the connecting hole of first kind of pole piece and barrier film.
6. according to each described secondary cell in the claim 1 to 5, it is characterized in that: said cathode sheets, anode strip, barrier film all are selected from a kind of in circle, square, the ellipse respectively.
7. according to each described secondary cell in the claim 1 to 5, it is characterized in that: said first kind of pole piece is anode strip, and second kind of pole piece is cathode sheets, and column is the aluminium post, and the contraposition post is the copper post.
8. according to each described secondary cell in the claim 1 to 5, it is characterized in that: said cathode sheets, anode strip and barrier film all are annular, and the external diameter of barrier film is more than or equal to the external diameter of cathode sheets, and the while is more than or equal to the external diameter of anode strip.
9. according to each described secondary cell in the claim 1 to 5, it is characterized in that: the hole of the same race on said anode and cathode slice and the barrier film is for being symmetrically distributed.
10. according to each described secondary cell in the claim 1 to 5; It is characterized in that: said anode and cathode slice all comprises collector respectively and is coated on the diaphragm on the collector, on the anode and cathode slice the porose non-district of filming that all is opened in uncoated diaphragm on its collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205387262U CN202616300U (en) | 2011-12-21 | 2011-12-21 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205387262U CN202616300U (en) | 2011-12-21 | 2011-12-21 | Secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202616300U true CN202616300U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205387262U Expired - Lifetime CN202616300U (en) | 2011-12-21 | 2011-12-21 | Secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202616300U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332648A (en) * | 2014-07-31 | 2015-02-04 | 中航锂电（洛阳）有限公司 | Special-shaped laminated-sheet-typed lithium ion battery and cell |
-
2011
- 2011-12-21 CN CN2011205387262U patent/CN202616300U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332648A (en) * | 2014-07-31 | 2015-02-04 | 中航锂电（洛阳）有限公司 | Special-shaped laminated-sheet-typed lithium ion battery and cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |