CN205282589U - Lithium battery - Google Patents
Lithium battery Download PDFInfo
- Publication number
- CN205282589U CN205282589U CN201520865055.9U CN201520865055U CN205282589U CN 205282589 U CN205282589 U CN 205282589U CN 201520865055 U CN201520865055 U CN 201520865055U CN 205282589 U CN205282589 U CN 205282589U
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- China
- Prior art keywords
- district
- battery core
- spirally wound
- powder
- wound battery
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a lithium battery, including the electric core of the coiling formula that is the platykurtic, the non - whitewashed position at the back of polar plate is between empty paper tinsel district of spot welding and powder district, and just the area in non - powder district is not more than the area in powder district, two the terminal orientation of polar plate is opposite, two utmost point ear is located the width direction's of coiling formula electricity core both ends, and be located respectively the top and the bottom of coiling formula electricity core. The utility model provides a pair of lithium battery has avoided that non - powder district area is too big to be leaded to the pole piece roll -in to be beaten rolling up, consequently, can not influence that the pole piece is cut, spot welding utmost point ear and a preparation roll core. Simultaneously, through distinguishing mutual staggered mode with utmost point ear with the powder, reduce the thickness of whole coiling formula electricity core, can be applicable to thinner lithium ion battery's production, be particularly useful for the polymer ultra -thin battery of thickness below 1.0mm batch production.
Description
Technical field
The utility model relates to technical field of lithium ion, particularly relates to a kind of lithium cell.
Background technology
Soft bag lithium ionic cell has that weight is light, safety performance good, can the advantage such as customized any size, therefore application in the fields such as mobile electronic device and portable mobile power supply such as bluetooth, 2G/3G/4G mobile phone, medical product, wearing product, payment by banker products is increasingly extensive.
Ultrathin is an important directions of electronic product development, therefore, and the ultrathin of the ultrathin inevitable requirement battery of electronic product. Along with the development of science and technology, the Application Areas of thin polymer lithium cell is more and more extensive, such as the utilization etc. on payment by banker U shield, credit card and wearing product.
At present, the battery core of conventional soft bag lithium ionic cell generally adopts spirally wound or stacked, and its structure comprises positive plate, negative plate and barrier film, and positive plate and negative plate are split by barrier film, and positive plate and negative plate connect anode ear and negative electrode lug respectively. Wherein, preparing positive plate and negative plate, the tow sides in its plate face are provided with corresponding powder district, for being coated with positive powder and negative electrode powder, wherein, powder layer has certain thickness. At present in order to reduce overall thickness, it is all generally the area of the coating in the powder district adopting the side reducing positive plate and negative plate, thus reduces the thickness of positive plate and negative plate.
But, when adopting the mode reducing powder district, side area, if the area in powder district is less than the area in Fei Fen district, positive plate/negative plate clot phenomenon is serious, pole piece is cut, spot welding anode ear/negative electrode lug and make core operation easier very big, it is difficult to effectively control and batch production, limits battery and develop to thinner direction.
Practical novel content
The purpose of this utility model is to propose a kind of lithium cell, if be less than the area in Fei Fen district to solve in prior art the area in the powder district existed, positive plate/negative plate clot phenomenon is serious, pole piece is cut, spot welding anode ear/negative electrode lug and make core operation easier very big, it is difficult to effectively control and batch production, limits the technical problem that battery develops to thinner direction.
For reaching this object, the utility model by the following technical solutions:
A kind of lithium cell, comprises the spirally wound battery core in flats, and described spirally wound battery core comprises two pieces of pole plates, is respectively positive plate and negative plate, is provided with barrier film between two pieces of described pole plates;
The end of described pole plate is equipped with the spot welding Kong Bo district for connecting tab, the front of described pole plate is powder district, the back side comprises powder district and Fei Fen district, the described Fei Fen district at the back side of described pole plate is positioned between described spot welding Kong Bo district and described powder district, and the area in described Fei Fen district is not more than the area in described powder district;
The end of two pieces of described pole plates is towards the opposite, and two described lugs are located at the two ends of the width of described spirally wound battery core, and lay respectively at top and the bottom of described spirally wound battery core.
Further, it is inner that the first end of described barrier film is positioned at described spirally wound battery core, and the end of described barrier film wraps up two pieces of described pole pieces, and is located at the middle part of the side of described spirally wound battery core.
Further, the width of described spirally wound battery core is not less than the width in the Fei Fen district at the back side of described pole plate.
Further, the one that the material of described positive plate is at least in cobalt acid lithium, lithium manganate, ternary material or LiFePO 4 material, the one that the material of described negative plate is at least in graphite or silicon carbon material.
Further, the total width in described spot welding Kong Bo district and described Fei Fen district equals the width of described spirally wound battery core.
Further, the thickness of described spirally wound battery core is less than 1mm.
A kind of lithium cell that the utility model provides, the area in the Fei Fen district, the back side of pole plate is not more than the area in powder district, avoids that Fei Fen district area is excessive causes pole piece roll-in clot; Simultaneously, spirally wound battery core two lugs are arranged on the two ends of its width, and one be arranged on top, another is arranged on bottom, owing to lug is connected to spot welding Kong Bo district, and spot welding Kong Bo district is connected with the Fei Fen district at the pole plate back side, therefore, the thinner thickness of lug part (end of pole plate), two lugs are all positioned at thinner part, it is staggered with powder district part, overall thickness can be effectively reduced.
This lithium cell and its preparation method, avoid that Fei Fen district area is excessive causes pole piece roll-in clot, therefore, can not have influence on that pole piece is cut, spot welding lug and make core. Meanwhile, by mode lug and powder district mutually staggered, reduce the thickness of overall spirally wound battery core, it is possible to be applicable to the production of thinner lithium ion battery, be particularly useful for the batch production of thickness at the ultra-thin battery of polymkeric substance of below 1.0mm.
Accompanying drawing explanation
Fig. 1 is the front view of the pole plate of the lithium cell that the utility model embodiment provides;
Fig. 2 is the rear view of the pole plate of the lithium cell that the utility model embodiment provides;
Fig. 3 is the front view of the Wound-rotor type battery core of the lithium cell that the utility model embodiment provides;
Fig. 4 is the FB(flow block) of the preparation method of the lithium cell that the utility model embodiment provides.
In figure:
1, positive plate; 2, negative plate; 3, barrier film; 4, spot welding Kong Bo district; 5, lug; 6, powder district; 7, Fei Fen district.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, the technical solution of the utility model is described further.
Embodiment 1
As Figure 1-3, a kind of lithium cell, comprises the spirally wound battery core in flats, and spirally wound battery core comprises two pieces of pole plates, is respectively between positive plate 1 and negative plate 2, two pieces of pole plates and is provided with barrier film 3;
The end of pole plate is equipped with the spot welding Kong Bo district 4 for connecting tab 5, the front of pole plate is powder district 6, the back side comprises powder district 6 and Fei Fen district 7, and the Fei Fen district 7 at the back side of pole plate is between spot welding Kong Bo district 4 and powder district 6, and the area in Qie Feifen district 7 is not more than the area in powder district 6;
The end of two pieces of pole plates is towards the opposite, and two lugs 5 are located at the two ends of the width of spirally wound battery core, and lay respectively at top and the bottom of spirally wound battery core.
A kind of lithium cell that above-described embodiment provides, the area in the Fei Fen district, the back side 7 of pole plate is not more than the area in powder district 6, avoids that Fei Fen district 7 area is excessive causes pole piece roll-in clot; Simultaneously, spirally wound battery core two lugs 5 are arranged on the two ends of its width, and one be arranged on top, another is arranged on bottom, owing to lug 5 is connected to spot welding Kong Bo district 4, and spot welding Kong Bo district 4 is connected with the Fei Fen district 7 at the pole plate back side, therefore, the thinner thickness of lug 5 part (end of pole plate), two lugs 5 are all positioned at thinner part, it is staggered with powder district 6 part, overall thickness can be effectively reduced.
This lithium cell and its preparation method, avoid that Fei Fen district 7 area is excessive causes pole piece roll-in clot, therefore, can not have influence on that pole piece is cut, spot welding lug 5 and make core. Meanwhile, by the mode mutually staggered with powder district 6 by lug 5, reduce the thickness of overall spirally wound battery core, it is possible to be applicable to the production of thinner lithium ion battery, be particularly useful for the batch production of thickness at the ultra-thin battery of polymkeric substance of below 1.0mm.
Embodiment 2
As Figure 1-3, a kind of lithium cell, comprises the spirally wound battery core in flats, and spirally wound battery core comprises two pieces of pole plates, is respectively between positive plate 1 and negative plate 2, two pieces of pole plates and is provided with barrier film 3;
The end of pole plate is equipped with the spot welding Kong Bo district 4 for connecting tab 5, the front of pole plate is powder district 6, the back side comprises powder district 6 and Fei Fen district 7, and the Fei Fen district 7 at the back side of pole plate is between spot welding Kong Bo district 4 and powder district 6, and the area in Qie Feifen district 7 is not more than the area in powder district 6;
The end of two pieces of pole plates is towards the opposite, and two lugs 5 are located at the two ends of the width of spirally wound battery core, and lay respectively at top and the bottom of spirally wound battery core.
It is inner that the first end of barrier film 3 is positioned at spirally wound battery core, and the end of barrier film 3 wraps up two pieces of pole pieces, and is located at the middle part of the side of spirally wound battery core.
The effect of barrier film 3 is insulation, after positive plate and negative plate 2 and barrier film 3 all reels, now, the continuation of the end of barrier film 3 is reeled along spirally wound battery core, spirally wound battery core can be surrounded by barrier film 3, form an isolator completely. Wherein, the end of barrier film 3 is arranged on the middle part of the side of spirally wound battery core, both it has been convenient to barrier film 3 and has been fixed with the barrier film 3 below it and is connected, meanwhile, this part covers the part corresponding with lug 5, the part that namely thickness glue is thin, therefore, the thickness of increase spirally wound battery core that can not be further.
Wherein, the width of spirally wound battery core is not less than the width in the Fei Fen district 7 at the back side of pole plate.
The object that lug 5 can stagger mutually with powder district 6 avoids lug 5 mutually to superpose with powder district 6 and increase overall thickness. Therefore, the width of spirally wound battery core is set to be not less than can the avoiding repeating superposition in one fixed width scope Nei Fen district 6 of width in the Fei Fen district 7 at the back side of pole plate and increases overall thickness.
Preferably, the total width in spot welding Kong Bo district 4 and Fei Fen district 7 equals the width of spirally wound battery core.
Preferably, the one that the material of positive plate is at least in cobalt acid lithium, lithium manganate, ternary material or LiFePO 4 material, the one that the material of negative plate is at least in graphite or silicon carbon material.
The thickness of described spirally wound battery core is less than 1mm.
The thickness of the spirally wound battery core of this lithium cell can control at below 1mm, thus be more conducive to lithium cell and develop to ultrathin.
Embodiment 3
As Figure 1-4, the preparation method of a kind of lithium cell, prepares spirally wound battery core and comprises the following steps:
Prepare positive plate 1 and negative plate 2; The reserved spot welding Kong Bo district 4 of end at pole plate, the front of pole plate is powder district 6, back portion is powder district 6, district 7 of reserved Fei Fen district 7, Fei Fen is between powder district 6 and spot welding Kong Bo district 4, and the width in Qie Feifen district 7 is not more than the width in powder district 6, the powder district 6 of positive plate 1 is coated with positive powder, and spot welding Kong Bo district 4 connects anode ear, the powder district 6 of positive plate 1 is coated with negative electrode powder, and spot welding Kong Bo district 4 connects negative electrode lug;
Coiling and molding: comprise two openings by being wound in a S shape in the middle part of barrier film 3, respectively the top of positive plate 1 and negative plate 2 is placed in two opening places of barrier film 3, and negative plate and positive plate are separated by barrier film 3, afterwards, together with negative plate, barrier film 3 are wound on mutually with positive plate, winding molding formula battery core.
After shaping rolling electric core winding is shaping, around shaping rolling battery core, one end of barrier film 3 being continued winding, barrier film 3 disconnects after shaping rolling battery core being wrapped up.
Concrete, to be wound into the spirally wound battery core of offset flat shape, in order to be all adopt once to reel by its gauge control at below 1mm, positive plate and negative plate, namely it is similar in midline doubling, in upper and lower parallel superposition two panels. Wherein, positive plate is bending winding from top to bottom, and negative plate is bending winding from bottom to top, wherein, the top of positive plate and negative plate and tail end towards being contrary, be provided with between positive plate and negative plate and be wound with barrier film 3. Adopt above-mentioned preparation method, namely the spirally wound battery core of offset flat shape is obtained, wherein, anode ear and negative electrode lug are setting up and down, and left and right staggers setting, according to the distribution characteristics between the lug 5 on positive plate 1 and negative plate 2, Fei Fen district 7 and powder district 6, finally achieve between lug 5 and powder district 6 structure being staggered, it is possible to the thickness of effective control spirally wound battery core.
Below know-why of the present utility model is described in conjunction with specific embodiments. These describe just in order to explain principle of the present utility model, and can not be interpreted as the restriction to the utility model protection domain by any way. Based on explanation herein, the technician of this area does not need to pay creative work can associate other embodiment of the present utility model, and these modes all will fall within protection domain of the present utility model.
Claims (5)
1. a lithium cell, it is characterised in that, comprise the spirally wound battery core in flats, described spirally wound battery core comprises two pieces of pole plates, is respectively positive plate (1) and negative plate (2), is provided with barrier film (3) between two pieces of described pole plates;
The end of described pole plate is equipped with the spot welding Kong Bo district (4) for connecting tab (5), the front of described pole plate is powder district (6), the back side comprises powder district (6) and Fei Fen district (7), the described Fei Fen district (7) at the back side of described pole plate is positioned between described spot welding Kong Bo district (4) and described powder district (6), and the area in described Fei Fen district (7) is not more than the area of described powder district (6);
The end of two pieces of described pole plates is towards the opposite, and two described lugs (5) are located at the two ends of the width of described spirally wound battery core, and lay respectively at top and the bottom of described spirally wound battery core.
2. lithium cell according to claim 1, it is characterized in that, it is inner that the first end of described barrier film (3) is positioned at described spirally wound battery core, and the end of described barrier film (3) wraps up two pieces of described pole plates, and is located at the middle part of the side of described spirally wound battery core.
3. lithium cell according to claim 1, it is characterised in that, the width of described spirally wound battery core is not less than the width in the Fei Fen district (7) at the back side of described pole plate.
4. lithium cell according to claim 3, it is characterised in that, the total width of described spot welding Kong Bo district (4) and described Fei Fen district (7) equals the width of described spirally wound battery core.
5. lithium cell according to claim 1, it is characterised in that, the thickness of described spirally wound battery core is less than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520865055.9U CN205282589U (en) | 2015-10-30 | 2015-10-30 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520865055.9U CN205282589U (en) | 2015-10-30 | 2015-10-30 | Lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205282589U true CN205282589U (en) | 2016-06-01 |
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ID=56067131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520865055.9U Withdrawn - After Issue CN205282589U (en) | 2015-10-30 | 2015-10-30 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205282589U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261797A (en) * | 2015-10-30 | 2016-01-20 | 惠州亿纬锂能股份有限公司 | Lithium battery and preparation method therefor |
| CN111211357A (en) * | 2018-11-22 | 2020-05-29 | 宁德新能源科技有限公司 | Winding battery cell |
-
2015
- 2015-10-30 CN CN201520865055.9U patent/CN205282589U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261797A (en) * | 2015-10-30 | 2016-01-20 | 惠州亿纬锂能股份有限公司 | Lithium battery and preparation method therefor |
| CN105261797B (en) * | 2015-10-30 | 2018-04-13 | 惠州亿纬锂能股份有限公司 | A kind of lithium battery and preparation method thereof |
| CN111211357A (en) * | 2018-11-22 | 2020-05-29 | 宁德新能源科技有限公司 | Winding battery cell |
| CN111211357B (en) * | 2018-11-22 | 2022-06-10 | 宁德新能源科技有限公司 | Winding battery cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20180413 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20180413 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |