CN201910465U - Square coiling lithium battery - Google Patents
Square coiling lithium battery Download PDFInfo
- Publication number
- CN201910465U CN201910465U CN2010206982171U CN201020698217U CN201910465U CN 201910465 U CN201910465 U CN 201910465U CN 2010206982171 U CN2010206982171 U CN 2010206982171U CN 201020698217 U CN201020698217 U CN 201020698217U CN 201910465 U CN201910465 U CN 201910465U
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- CN
- China
- Prior art keywords
- lithium battery
- pad
- winding type
- pin hole
- type lithium
- 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 - Fee Related
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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 square coiling lithium battery which comprises a battery core (1) which is formed by sequentially superposing and winding a cathode sheet (1.1), a diaphragm (1.3) and an anode sheet (1.2); and a coiling needle hole (1.4) is arranged in the middle of the battery core (1) and is internally provided with an insulating washer (1.5) which is acid-resistant and alkali-resistant and can generate the irreversible deformation. The square coiling lithium battery can prevent the arc-shaped corner of an internal ring polar sheet of the battery core from generating the cracking phenomenon and prevent the diaphragm from generating the damage phenomenon.
Description
Technical field
The utility model relates to a kind of lithium battery, relates to a kind of square winding type lithium battery or rather.
Background technology
Lithium battery is widely used in numerous areas, particularly mobile phone, electron trade because of its operating voltage height, outstanding feature such as specific energy is big, self discharge is little.At present, the structure of lithium battery mainly contains stacked and winding type.The utility model relates to square winding type lithium battery.
Square winding type lithium battery comprises battery, and described battery is stacked successively and reeled by negative plate, barrier film and positive plate and forms.Because battery is to be formed attached to reeling on the volume pin by negative plate, barrier film and positive plate, need after reeling the volume pin is taken out, therefore will reserve the volume pin hole in the middle of the battery, and based on the requirement of square shaped winding type lithium battery profile, lithium battery needs it is colded pressing or hot pressing after encapsulation.Owing to there is the volume pin hole in the middle of the battery, cold pressing or the process of hot pressing in, make involute pole piece arc corner fracture and the damaged phenomenon of barrier film appearance occur easily, and the damage of fracture of inner ring pole piece and barrier film causes faults such as short circuit easily, thereby the security performance of lithium battery is produced influence greatly.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of generation fracture of battery inner ring pole piece arc corner and barrier film of preventing the square winding type lithium battery of disrepair phenomenon to occur.
Technical solution of the present utility model is, a kind of square winding type lithium battery with following structure is provided, comprise the battery that stacks successively and reel and form by negative plate, barrier film and positive plate, the volume pin hole is left at described battery middle part, be provided with in the described volume pin hole have acid and alkali-resistance, the pad of the non-reversible deformation of insulation.
After adopting above structure, the square winding type lithium battery of the utility model compared with prior art has the following advantages:
Since be provided with in the volume pin hole of the square winding type lithium battery of the utility model have acid and alkali-resistance, the pad of the non-reversible deformation of insulation, therefore, square winding type lithium battery cold pressing or the process of hot pressing in, pad in the volume pin hole can support the pressure that cold press or hot press produce, can prevent that battery inner ring pole piece arc corner from producing the phenomenon of fracture and barrier film breakage, thereby also can avoid the security performance of lithium battery being protected because of the inner ring pole piece produces fracture and the damaged faults such as short circuit that cause of barrier film.
As a kind of improvement of the present utility model, the width of described pad is 95%～98% of a described volume pinhole width.The thickness of described pad is 20%～90% of described volume pin hole thickness.The length of described pad is 95%～98% of described volume pin hole length.This kind is designed to preferred embodiment of the utility model.
As another kind of improvement the of the present utility model, the left surface of described pad and right flank are cambered surface.Because the left surface and the right flank of described pad are cambered surface, cold pressing or the process of hot pressing in, the sideline of pad left surface or the sideline of right flank can not cut off battery inner ring pole piece or barrier film.
Also has a kind of improvement as of the present utility model, the pad of described pad for making by plastic material.Plastic material acid and alkali-resistance, high insulation and irreversible transformation relatively are fit to do pad of the present utility model.
Description of drawings
Fig. 1 is the structural representation of the battery of the square winding type lithium battery of the utility model.
Fig. 2 is the structural representation that the square winding type lithium battery of the utility model is placed with the battery of pad.
Shown in the figure: 1, battery, 1.1, negative plate, 1.2, positive plate, 1.3, barrier film, 1.4, the volume pin hole, 1.5, pad, 1.5.1, cambered surface.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please join Figure 1 and Figure 2, the square winding type lithium battery of the utility model comprises battery 1, and described battery 1 is stacked successively and reeled by negative plate 1.1, barrier film 1.3 and positive plate 1.2 and forms.Volume pin hole 1.4 is left at described battery 1 middle part, be provided with in the described volume pin hole 1.4 have acid and alkali-resistance, the pad of the non-reversible deformation of insulation 1.5, in this specific embodiment, the pad of described pad 1.5 for making by plastic material.The width of described pad 1.5 is 95%～98% of described volume pin hole 1.4 width.The thickness of described pad 1.5 is 20%～90% of described volume pin hole 1.4 thickness.The length of described pad 1.5 is 95%～98% of described volume pin hole 1.4 length.The left surface of described pad 1.5 and right flank are cambered surface 1.5.1.
Claims (6)
1. square winding type lithium battery, comprise the battery (1) that stacks successively and reel and form by negative plate (1.1), barrier film (1.3) and positive plate (1.2), volume pin hole (1.4) is left at described battery (1) middle part, it is characterized in that: be provided with in the described volume pin hole (1.4) have acid and alkali-resistance, the pad of the non-reversible deformation of insulation (1.5).
2. square winding type lithium battery according to claim 1 is characterized in that: the width of described pad (1.5) is 95%～98% of described volume pin hole (a 1.4) width.
3. square winding type lithium battery according to claim 2 is characterized in that: the thickness of described pad (1.5) is 20%～90% of described volume pin hole (1.4) thickness.
4. square winding type lithium battery according to claim 3 is characterized in that: the length of described pad (1.5) is 95%～98% of described volume pin hole (1.4) length.
5. square winding type lithium battery according to claim 1 is characterized in that: the left surface of described pad (1.5) and right flank are cambered surface (1.5.1).
6. square winding type lithium battery according to claim 1 is characterized in that: the pad of described pad (1.5) for being made by plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206982171U CN201910465U (en) | 2010-12-29 | 2010-12-29 | Square coiling lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206982171U CN201910465U (en) | 2010-12-29 | 2010-12-29 | Square coiling lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910465U true CN201910465U (en) | 2011-07-27 |
Family
ID=44302665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206982171U Expired - Fee Related CN201910465U (en) | 2010-12-29 | 2010-12-29 | Square coiling lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201910465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410257A (en) * | 2016-11-07 | 2017-02-15 | 珠海格力电器股份有限公司 | Winding supporting core, secondary battery, manufacturing method of secondary battery, and battery winding machine |
| WO2017197639A1 (en) * | 2016-05-20 | 2017-11-23 | 宁德时代新能源科技股份有限公司 | Battery cell and method for forming same |
-
2010
- 2010-12-29 CN CN2010206982171U patent/CN201910465U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017197639A1 (en) * | 2016-05-20 | 2017-11-23 | 宁德时代新能源科技股份有限公司 | Battery cell and method for forming same |
| CN106410257A (en) * | 2016-11-07 | 2017-02-15 | 珠海格力电器股份有限公司 | Winding supporting core, secondary battery, manufacturing method of secondary battery, and battery winding machine |
| CN106410257B (en) * | 2016-11-07 | 2024-01-30 | 珠海格力电器股份有限公司 | Winding support core, secondary battery, method of manufacturing the same, and battery winding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20131229 |