CN202917578U - Positive-negative plate structure of rate-type lithium ion battery - Google Patents
Positive-negative plate structure of rate-type lithium ion battery Download PDFInfo
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- CN202917578U CN202917578U CN2012205473934U CN201220547393U CN202917578U CN 202917578 U CN202917578 U CN 202917578U CN 2012205473934 U CN2012205473934 U CN 2012205473934U CN 201220547393 U CN201220547393 U CN 201220547393U CN 202917578 U CN202917578 U CN 202917578U
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- dressing district
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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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- 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
Abstract
The utility model relates to the field of lithium ion batteries, in particular to a positive-negative plate structure of a rate-type lithium ion battery. An empty aluminium foil which is larger than or equal to the circumference of the outer ring of a reeling core in length is reserved at the tail part of a positive plate, and an empty copper foil which is larger than or equal to the circumference of the outer ring of the reeling core in length is reserved at the tail part of a negative plate. As the empty foils with a certain length are arranged at the tail parts of both the positive plate and the negative plate, after the positive plate and the negative plate are reeled into a reeling core, the reeling core comprises a diaphragm, an empty copper foil, another diaphragm and an empty aluminium foil from the outside in. Compared with the prior art, empty foils without dressing are additionally wound on the positive plate and the negative plate, so that when a well assembled battery is under a safety performance test, particularly a pin-prick test, energy generated instantly when the positive plate and the negative plate are short-circuited is greatly reduced, the energy accumulation and temperature rise in the battery are decelerated, the voltage of the battery is lowered instantly after short circuit, the battery can not be fired, and accordingly, the safety performance and the comprehensive electrochemical performance of the battery are greatly improved.
Description
Technical field
The utility model relates to the lithium ion battery field, relates in particular to the positive/negative plate structure of rate lithium ion battery.
Background technology
In recent years, the rate lithium ion battery relies on the advantage of its dynamic property and high safety, and the application on portable power tool and model plane has obtained development at full speed.As energy storage component, security performance is to weigh the primary standard of rate lithium ion battery, and is to guarantee its security performance, needs in the production process push, impact, acupuncture, the detection of project such as fall it.
The positive/negative plate structure of the rate lithium ion battery of prior art comprises positive plate and negative plate: with reference to figure 1, positive plate 1 comprises aluminium foil 11, be coated in the first anode dressing district 14 on aluminium foil 11 head two sides, be coated in the second anode dressing district 15 and the 3rd anode dressing district 17 that is coated in aluminium foil 11 afterbody two sides on two sides, aluminium foil 11 middle part, the first anode dressing district 14 and the 3rd anode dressing district 17 equal in length, be provided with between the first anode ear 12, the second anode dressing districts 15 and the 3rd anode dressing district 17 between the first anode dressing district 14 and the second anode dressing district 15 and be provided with the second anode ear 13; With reference to figure 2, negative plate 2 comprises Copper Foil 21, the head end of Copper Foil 21 is provided with the first negative electrode lug 22, the tail end of Copper Foil 21 is provided with the second negative electrode lug 23, Copper Foil 21 one sides are coated with A face negative pole dressing district 24, another side is coated with B face negative pole dressing district 25, and A face negative pole dressing district 24 length are greater than B face negative pole dressing district 25, and the head end in the head end in A face negative pole dressing district 24 and B face negative pole dressing district 25 aligns.Pierce through barrier film for avoiding welding on the aluminium foil 11 burr that welding negative electrode lug place produces on anode ear place and the Copper Foil 21, positive and negative lug posts respectively tab.In the prior art, positive and negative plate adopts following conventional design: the length of positive plate 1 is 850mm, and width is 56mm; The length of negative plate 2 is 930mm, and width is 58mm.
The volume core that the rate positive electrode plate and negative electrode plate of lithium ion battery of use prior art is rolled into, because positive and negative plate finishes up by the dressing district, carrying out the security performance experiment, especially when carrying out pin prick test, after draw point thrusts the battery that completely fills, with the positive and negative plate instantaneous short circuit of dressing, emit immediately a large amount of heat, catching fire very easily, security performance are still waiting to improve.
Summary of the invention
The purpose of this utility model is to overcome shortcoming and defect of the prior art, provides a kind of security performance high rate positive electrode plate and negative electrode plate of lithium ion battery structure.
To achieve these goals, the utility model adopts following technical scheme: the positive/negative plate structure of rate lithium ion battery, comprise the positive plate and the negative plate that consist of the volume core after reeling together, positive plate comprises aluminium foil, all is arranged at the first anode ear and second anode ear of aluminium foil, and aluminum foil coating is covered with the anode dressing district; Negative plate comprises Copper Foil, all is arranged at the first negative electrode lug and second negative electrode lug of Copper Foil, Copper Foil is coated with negative pole dressing district, the afterbody of positive plate leaves the sky aluminium foil, the length of empty aluminium foil is more than or equal to the outer circumference of volume core, the afterbody of negative plate leaves the sky Copper Foil, and the length of empty Copper Foil is more than or equal to the outer circumference of volume core.
Wherein, the anode dressing district comprises the first anode dressing district and the second anode dressing district, the first anode dressing district and the second anode dressing district all are coated on the two sides of aluminium foil, the first anode ear is arranged between the first anode dressing district and the second anode dressing district, and the second anode ear is arranged at the tail end in the second anode dressing district.
Wherein, the head of described positive plate leaves the sky aluminium foil.
Wherein, negative pole dressing district comprises the A face negative pole dressing district that is coated on the Copper Foil one side and the B face negative pole dressing district that is coated on the Copper Foil another side, the head end alignment in the head end in A face negative pole dressing district and B face negative pole dressing district, the length in A face negative pole dressing district is greater than the length in B face negative pole dressing district, the first negative electrode lug is arranged at the head end in A face negative pole dressing district, and the second negative electrode lug is arranged at the tail end in A face negative pole dressing district.
Wherein, the head of described negative plate leaves the sky Copper Foil.
Wherein, the aluminium foil at described anode ear and anode ear place all posts anode ear glue, and described anode ear comprises the first anode ear and the second anode ear; The Copper Foil at described negative electrode lug and negative electrode lug place all posts negative electrode lug glue, and described negative electrode lug comprises the first negative electrode lug and the second negative electrode lug.
Wherein, the length of described positive plate is 880mm, and width is 56mm, and the length in anode dressing district is 812mm, and the length of the empty aluminium foil of afterbody is 64mm.
Wherein, the length of described negative plate is 942mm, and width is 58mm, and the length in A face negative pole dressing district is 870mm, and the length in B face negative pole dressing district is 820mm, and the length of the empty Copper Foil of afterbody is 60mm.
Wherein, the length of described anode ear glue and described negative electrode lug glue is 12mm.
The utility model beneficial effect: the afterbody of positive plate of the present utility model leaves the sky aluminium foil, and the length of empty aluminium foil is more than or equal to the outer circumference of volume core, and the afterbody of negative plate leaves the sky Copper Foil, and the length of empty Copper Foil is more than or equal to the outer circumference of volume core; Just, the afterbody of negative plate is equipped with the empty paper tinsel of certain-length, thereby just, behind the negative plate coiling core, the volume core is respectively barrier film-empty Copper Foil-barrier film-empty aluminium foil from outside to inside, just, negative plate compared to existing technology all multireel around a circle not with the empty paper tinsel of dressing, therefore, the battery that assembles is carrying out the security performance experiment, especially when carrying out pin prick test, just, the energy that moment produced when negative plate was short-circuited significantly reduces, the speed of inside battery energy accumulation and temperature rise slows down, and cell voltage can reduce moment after the short circuit, and battery phenomenon on fire can not occur, and has greatly improved security performance and the comprehensive electrochemical of battery.
Description of drawings
Fig. 1 is the cutaway view of the positive plate of prior art;
Fig. 2 is the cutaway view of the negative plate of prior art;
Fig. 3 is the cutaway view of the positive plate of embodiment;
Fig. 4 is the cutaway view of the negative plate of embodiment.
Fig. 1 to Fig. 4 comprises following Reference numeral:
Positive plate-1; Aluminium foil-11; The first anode ear-12; The second anode ear-13; The first anode dressing district-14; The second anode dressing district-15; Anode ear glue-16; Negative plate-2; Copper Foil-21; The first negative electrode lug-22; The second negative electrode lug-23; A face negative pole dressing district-24; B face negative pole dressing district-25; Negative electrode lug glue-26.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
With reference to figure 3 and Fig. 4, the utility model comprises together positive plate 1 and the negative plate 2 that consists of the volume core after reeling, and positive plate 1 comprises aluminium foil 11, all is arranged at the first anode ear 12 and second anode ear 13 of aluminium foil 11, and aluminium foil 11 is coated with the anode dressing district; Negative plate 2 comprises Copper Foil 21, all is arranged at the first negative electrode lug 22 and second negative electrode lug 23 of Copper Foil 21, and Copper Foil 21 is coated with negative pole dressing district; The afterbody of positive plate 1 leaves the sky aluminium foil, and the length of empty aluminium foil is more than or equal to the outer circumference of volume core, and the afterbody of negative plate 2 leaves the sky Copper Foil, and the length of empty Copper Foil is more than or equal to the outer circumference of volume core.
Since positive/negative plate compared to existing technology all multireel around a circle not with the empty paper tinsel of dressing, just, behind the negative plate coiling core, the volume core is respectively barrier film-empty Copper Foil-barrier film-empty aluminium foil from outside to inside, therefore, the battery that assembles is carrying out the security performance experiment, especially when carrying out pin prick test, just, the energy that moment produced when negative plate was short-circuited significantly reduces, the speed of inside battery energy accumulation and temperature rise slows down, and the voltage of battery can reduce moment after the short circuit, phenomenon on fire can not occur in battery, has greatly improved security performance and the comprehensive electrochemical of battery.
With reference to figure 3, the anode dressing district of positive plate 1 comprises the first anode dressing district 14 and the second anode dressing district 15 in the present embodiment, the first anode dressing district 14 and the second anode dressing district 15 all are coated on the two sides of aluminium foil 11, the first anode ear 12 is arranged between the first anode dressing district 14 and the second anode dressing district 15, and the second anode ear 13 is arranged at the tail end in the second anode dressing district 15.
As the rate lithium ion battery, for the internal resistance that reduces battery and the high rate performance that improves battery, two anode ears need to be set.With reference to figure 1, two anode ears all are positioned among the anode dressing district in the prior art, are unfavorable for the heat radiation of battery during large multiplying power discharging.With reference to figure 3, in the present embodiment, the first anode ear 12 of positive plate 1 is located between the first anode dressing district 14 and the second anode dressing district 15, the second anode ear 13 is located at the tail end in the second anode dressing district 15, and the second anode ear 13 is located at the empty aluminium foil 11 of afterbody of positive plate 1, is conducive to shunting and the heat radiation of battery.
With reference to figure 4, the negative pole dressing district of negative plate 2 comprises the A face negative pole dressing district 24 that is coated on Copper Foil 21 one sides and the B face negative pole dressing district 25 that is coated on Copper Foil 21 another sides in the present embodiment, the head end alignment in the head end in A face negative pole dressing district 24 and B face negative pole dressing district 25, the length in A face negative pole dressing district 24 is greater than the length in B face negative pole dressing district 25, the first negative electrode lug 22 is arranged at the head end in A face negative pole dressing district 24, and the second negative electrode lug 23 is arranged at the tail end in A face negative pole dressing district 24.The first negative electrode lug 22 and the second negative electrode lug 23 are separately positioned on the design at the two ends of negative plate 2 can be conveniently and the assembling of pad, thereby realize mass production.
Further, the head of positive plate 1 leaves the sky aluminium foil, and the head of negative plate 2 leaves the sky Copper Foil.In the cut-parts operation, cut-off knife can directly be cut out on empty paper tinsel, reduces the situation of dressing district dry linting, thereby reduces self discharge.On the other hand, head uses empty paper tinsel, during the first lap of the volume core of reeling, coiling be the empty paper tinsel that is not provided with the empty paper tinsel of lug or is provided with lug, thereby when being rolled onto the number of turns of back, the outer ring of volume core is larger, the pole piece situation of crumpling has clear improvement.
Pierce through barrier film for avoiding welding on the aluminium foil 11 burr that welding negative electrode lug place produces on anode ear place and the Copper Foil 21, the aluminium foil 11 at anode ear and anode ear place all posts anode ear glue 16, and anode ear comprises the first anode ear 12 and the second anode ear 13; The Copper Foil 21 at negative electrode lug and negative electrode lug place all posts negative electrode lug glue 26, and negative electrode lug comprises the first negative electrode lug 22 and the second negative electrode lug 23.
As preferred embodiment, the length of positive plate 1 of the present utility model is 880mm, and width is 56mm, and the length in anode dressing district is 812mm, and the length of the empty aluminium foil 11 of afterbody is 64mm.The first anode ear 12 is located on the empty aluminium foil of head, and the second anode ear 13 is located on the empty aluminium foil of afterbody.The length of negative plate 2 is 942mm, and width is 58mm, and the length in A face negative pole dressing district is 870mm, and the length in B face negative pole dressing district is 820mm, and the length of the empty Copper Foil 21 of afterbody is 60mm.The first negative electrode lug 22 is located on the empty Copper Foil of head, and the second negative electrode lug 23 is located on the empty Copper Foil of afterbody.The length of anode ear glue 16 and negative electrode lug glue 26 is 12mm.
Manufacturing process of the present utility model is simple, easy to assembly, security performance is high.
Above content only is preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (9)
1. the positive/negative plate structure of rate lithium ion battery comprising the positive plate and the negative plate that consist of the volume core after reeling together, and positive plate comprises aluminium foil, all is arranged at the first anode ear and second anode ear of aluminium foil, and aluminum foil coating is covered with the anode dressing district; Negative plate comprises Copper Foil, all is arranged at the first negative electrode lug and second negative electrode lug of Copper Foil, Copper Foil is coated with negative pole dressing district, it is characterized in that: the afterbody of positive plate leaves the sky aluminium foil, the length of empty aluminium foil is more than or equal to the outer circumference of volume core, the afterbody of negative plate leaves the sky Copper Foil, and the length of empty Copper Foil is more than or equal to the outer circumference of volume core.
2. the positive/negative plate structure of rate lithium ion battery according to claim 1, it is characterized in that: the anode dressing district comprises the first anode dressing district and the second anode dressing district, the first anode dressing district and the second anode dressing district all are coated on the two sides of aluminium foil, the first anode ear is arranged between the first anode dressing district and the second anode dressing district, and the second anode ear is arranged at the tail end in the second anode dressing district.
3. the positive/negative plate structure of rate lithium ion battery according to claim 1, it is characterized in that: the head of described positive plate leaves the sky aluminium foil.
4. the positive/negative plate structure of rate lithium ion battery according to claim 1, it is characterized in that: negative pole dressing district comprises the A face negative pole dressing district that is coated on the Copper Foil one side and the B face negative pole dressing district that is coated on the Copper Foil another side, the head end alignment in the head end in A face negative pole dressing district and B face negative pole dressing district, the length in A face negative pole dressing district is greater than the length in B face negative pole dressing district, the first negative electrode lug is arranged at the head end in A face negative pole dressing district, and the second negative electrode lug is arranged at the tail end in A face negative pole dressing district.
5. the positive/negative plate structure of rate lithium ion battery according to claim 1, it is characterized in that: the head of described negative plate leaves the sky Copper Foil.
6. the positive/negative plate structure of rate lithium ion battery according to claim 1, it is characterized in that: the aluminium foil at described anode ear and anode ear place all posts anode ear glue, and described anode ear comprises the first anode ear and the second anode ear; The Copper Foil at described negative electrode lug and negative electrode lug place all posts negative electrode lug glue, and described negative electrode lug comprises the first negative electrode lug and the second negative electrode lug.
7. the positive/negative plate structure of rate lithium ion battery according to claim 2, it is characterized in that: the length of described positive plate is 880mm, and width is 56mm, and the length in anode dressing district is 812mm, and the length of the empty aluminium foil of afterbody is 64mm.
8. the positive/negative plate structure of rate lithium ion battery according to claim 4, it is characterized in that: the length of described negative plate is 942mm, and width is 58mm, and the length in A face negative pole dressing district is 870mm, the length in B face negative pole dressing district is 820mm, and the length of the empty Copper Foil of afterbody is 60mm.
9. the positive/negative plate structure of rate lithium ion battery according to claim 6, it is characterized in that: the length of described anode ear glue and described negative electrode lug glue is 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205473934U CN202917578U (en) | 2012-10-24 | 2012-10-24 | Positive-negative plate structure of rate-type lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205473934U CN202917578U (en) | 2012-10-24 | 2012-10-24 | Positive-negative plate structure of rate-type lithium ion battery |
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| CN202917578U true CN202917578U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012205473934U Expired - Lifetime CN202917578U (en) | 2012-10-24 | 2012-10-24 | Positive-negative plate structure of rate-type lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682250A (en) * | 2013-11-25 | 2014-03-26 | 广东凯德能源科技有限公司 | Lithium ion battery pole piece structure resisting to high-strength vibration and soldering method for lithium ion battery pole piece structure |
| CN103746151A (en) * | 2013-12-07 | 2014-04-23 | 新余英泰能科技有限公司 | Method capable of enabling electronic cigarette battery to pass needling detection |
-
2012
- 2012-10-24 CN CN2012205473934U patent/CN202917578U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682250A (en) * | 2013-11-25 | 2014-03-26 | 广东凯德能源科技有限公司 | Lithium ion battery pole piece structure resisting to high-strength vibration and soldering method for lithium ion battery pole piece structure |
| CN103682250B (en) * | 2013-11-25 | 2015-11-18 | 广东凯德能源科技有限公司 | A kind of electrodes of lithium-ion batteries structure of anti-high-strength vibration and welding method thereof |
| CN103746151A (en) * | 2013-12-07 | 2014-04-23 | 新余英泰能科技有限公司 | Method capable of enabling electronic cigarette battery to pass needling detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170307 Address after: 523000 Guangdong Province, Dongguan City Shipai town to the West Village Songyuan 5 Road No. 1 Patentee after: DONGGUAN K-TECH NEW ENERGY CO.,LTD. Address before: 523330 Guangdong Province, Dongguan City Shipai town to the West Village Songyuan 5 Road No. 1 Patentee before: Guangdong K-TECH Energy Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |
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| CX01 | Expiry of patent term |