CN1921180A - Lithium ion battery pole piece, electricity core and method for making same - Google Patents
Lithium ion battery pole piece, electricity core and method for making same Download PDFInfo
- Publication number
- CN1921180A CN1921180A CNA2005100215748A CN200510021574A CN1921180A CN 1921180 A CN1921180 A CN 1921180A CN A2005100215748 A CNA2005100215748 A CN A2005100215748A CN 200510021574 A CN200510021574 A CN 200510021574A CN 1921180 A CN1921180 A CN 1921180A
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- lug
- pole piece
- bonding pad
- electric core
- sector region
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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
Abstract
The invention relates to a lithium battery electrode plate. Wherein, it comprises electrode plate non-uniformly distributed with several electrode ear connecting areas; said non-uniform distribution is made by coiling electrode plate into electric core to concentrate the electrode ear connecting areas into one arc area centered at the round hole of electrode core. The invention also provides a relative production. Via said electrode ears, the battery can discharge at large current; and the electrode ears are in the arc area, to increase the space of connecting operation; and the electrode ears are connected with large space beside, to connect the polar terminal easily.
Description
Technical field
The present invention relates to the manufacture method of building block and this building block of battery, concrete, the present invention relates to a kind of pole piece of lithium ion battery, electric core and their making.
Background technology
Universal day by day along with portable high-performance electric tool and intelligent toy, because portable dam improves day by day to the requirement of weight and continuous working period, the lithium ion battery that possesses high-energy-density and high working voltage just has stronger competitiveness simultaneously.Because nonaqueous electrolyte is than the restriction of low conductivity, its high rate charge-discharge performance is not good, most can only be with less than the electric current continuous firing discharge of 3C, spark less than the electric current of 10C, can't satisfy the requirement of transient large current discharge of continuous operation discharge, the 20C of application needs 7C to 10C such as electric tool.Therefore, field of power tools is captured by big reasonable Ni-MH of multiplying power discharging property (ni-mh) and Ni-Cd (NI-G) battery always, and the battery of other kinds is difficult to enter this field.
Chinese invention patent application " liquid lithium ionic cell of permission high current charge-discharge " (publication number: CN 1599119A) disclose a kind of liquid lithium ionic cell that allows high current charge-discharge, this invention is by the multipole ear structure of employing on each pole piece of battery and reduce positive/negative plate thickness significantly, thereby can allow battery with high current charge-discharge.But adopt the battery of the described method manufacturing of this application for a patent for invention to have following shortcoming: 1. owing to adopt a plurality of lugs and a plurality of lug to be evenly distributed on the pole piece, lug distributed around whole electric core after pole piece coiling became electric core, after Fig. 1 shows that pole piece coiling forms electric core, the vertical view that lug distributes on electric core end face, lug is circle distribution at electric core end face as can be seen from Figure, like this, when each lug is carried out attended operation, the lug of circle distribution has formed the almost operating space of sealing, brings great not convenient property to the attended operation between the lug and the attended operation of lug and polarity terminal.2. each lug length unanimity, after pole piece coiling became electric core, the lug that is distributed on the outer pole piece of electric core was difficult to link together with the lug that is distributed on the electric in-core layer pole piece of same polarity, had strengthened the difficulty of battery making.3. owing to the join domain width that adopts a plurality of lugs and lug and pole piece is the whole width of pole piece, as shown in Figure 2,1 is pole piece, and 2 is lug, the 3rd, and for lug 2 being connected the lug bonding pad on the pole piece.Cause the adhesion amount of active material on the pole piece to reduce like this, influence the capacity of battery, and, need the zone of scraping blade to increase on the pole piece, waste time and energy for lug is connected on the pole piece.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the above problems, provide convenient connection between a plurality of lugs of conveniently interconnecting between a kind of lug that can make on the same pole piece and linking together and the corresponding polarity terminal, with the electrodes of lithium-ion batteries of multipole ear bonding pad.
Another purpose of the present invention is in order to overcome the above problems, provide the lithium ion battery cell of the pole piece with said structure.
Still a further object of the present invention is in order to overcome the above problems, the manufacture method of above-mentioned electrodes of lithium-ion batteries and electric core to be provided.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses a kind of electrodes of lithium-ion batteries, comprise pole piece, be provided with a plurality of lugs bonding pad on the described pole piece with being non-uniform Distribution, described non-uniform Distribution is that described a plurality of lugs bonding pad is all concentrated being distributed in electric core center is in the sector region in the center of circle after pole piece forms electric core through reeling.
Described sector region is that angle is not more than 140 ° sector region.
The width of the lug bonding pad on the described pole piece is no more than 1/2nd of pole piece width.
The invention also discloses a kind of lithium ion battery cell, comprise positive plate and negative plate, just described, be provided with a plurality of lugs bonding pad with all being non-uniform Distribution on the negative plate, all be fixed with anode ear on each lug bonding pad on the positive plate, all be fixed with negative electrode lug on each lug bonding pad on the negative plate, described non-uniform Distribution is ought be just, after negative plate is separated by by barrier film and is formed electric core through reeling, each anode ear that stretches out electric core one end face is all concentrated being distributed in electric core center is in the sector region in the center of circle, and each negative electrode lug that stretches out electric core other end is all concentrated being distributed in electric core center is in the sector region in the center of circle.
Described sector region is that angle is not more than 140 ° sector region.
The width of the lug bonding pad on the described positive and negative plate is no more than 1/2nd of pole piece width.
The invention also discloses a kind of manufacture method of electrodes of lithium-ion batteries, be included in the step that a plurality of lugs bonding pad is set with being non-uniform Distribution on the pole piece, described non-uniform Distribution is that described a plurality of lugs bonding pad is all concentrated being distributed in electric core center is in the sector region in the center of circle after pole piece forms electric core through reeling.
Described sector region is that angle is not more than 140 ° sector region.
The described method that a plurality of lugs bonding pad is set on pole piece is for adopting the method for scraping blade, and the method for described scraping blade is meant after pole piece all has been coated with active material, and the active material of position, bonding pad on the pole piece is struck off.
Perhaps, the described method that a plurality of lugs bonding pad is set on pole piece is for adopting the white method of staying, and describedly stays white method to be meant to cover the lug bonding pad with veil before the coating active material on the pole piece, and the coating back is removed veil and formed the lug bonding pad.
The invention also discloses a kind of manufacture method of lithium ion battery cell, be included in the step that is provided with a plurality of lugs bonding pad and the fixing step of lug on each lug bonding pad with being non-uniform Distribution on the positive and negative plate, described non-uniform Distribution is after positive and negative plate is separated by by barrier film and is formed electric core through reeling, each anode ear that stretches out electric core one end face is all concentrated being distributed in electric core center is in the sector region in the center of circle, and each negative electrode lug that stretches out electric core other end is all concentrated being distributed in electric core center is in the sector region in the center of circle.
Described sector region is that angle is not more than 140 ° sector region.
The length of described each lug along with lug from the increase of electric core centre distance and increase.
Described on each lug bonding pad fixedly the mode of lug for adopting ultrasonic bonding, rivet welding or conductive adhesion.
In the present invention, described " lug length " or " lug of different length ", its " length " equal phalangeal process is for the length of the lug part of pole piece.Described " pole piece width " is after pole piece forms electric core, corresponding to electric core height; Described " width of lug bonding pad " is meant the width of lug bonding pad in above-mentioned " pole piece width " direction.
Owing to adopted above scheme, made the present invention possess following beneficial effect:
1, owing to be provided with a plurality of lugs bonding pad on the pole piece,, shortened the afflux path, improved the ability that the battery rapid large-current discharges and recharges by multipole ear parallel connection; 2, a plurality of lugs bonding pad is arranged on the pole piece with being non-uniform Distribution, be after it is reeled and concentrate that to be distributed in electric core center be in a certain sector region in the center of circle, greatly reduce the connection difficulty between the lug on each lug bonding pad on the same polarity pole piece, thereby it is easier to link to each other with the polarity terminal.
In preferred version of the present invention, sector region is that angle is not more than 140 ° sector region, in such sector region scope, after being connected between the lug, can not form the turnover of lug, makes connection easier and more firm.
Be no more than 1/2nd of pole piece width by the width that the lug bonding pad on the pole piece is set, thereby reduce the area of the bonding pad of lug and pole piece, effectively increased the adhesion amount of active material on the pole piece, help improving the capacity of battery, and the workload that makes employing scrape sheet mode making bonding pad lowers greatly.And connect lug and pole piece by the mode of ultrasonic bonding, can guarantee the fastness that the zonule connects.
Owing to adopt the lug of different length, effectively avoided being on the electric in-core layer pole piece lug be in the possibility that lug on the outer pole piece of electric core can not finely be connected, saved material; Lug length is along with lug increases from the increase of electric core centre distance, makes to interconnect the back between the lug and come together towards electric core central axial direction, further reduced the difficulty that is connected with the polarity terminal.
Description of drawings
Fig. 1 is that lug evenly distributes and is connected on the pole piece in the prior art, and pole piece coiling form electric core after, the vertical view that on electric core end face, distributes of lug;
Fig. 2 is in the prior art, the connection diagram of lug and pole piece;
Fig. 3 is the schematic diagram that lug of the present invention distributes on electrodes of lithium-ion batteries;
Fig. 4 be Fig. 3 connection after the pole piece coiling of lug forms electric core, the vertical view that lug distributes on electric core end face;
Fig. 5 is the connection diagram of lug of the present invention and pole piece.
Embodiment
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Positive plate and electric core with 26650 cylindrical lithium ion batteries is the realization that example illustrates a kind of electrodes of lithium-ion batteries of the present invention and electric core below.
As shown in Figure 3, a kind of positive plate 1 of 26650 cylindrical lithium ion batteries, this pole piece 1 length overall 1565mm.All be coated with active material on the pole piece 1 earlier; Be that 172.05mm place, a2 are that 555.00mm place, a3 are that 935.95mm place and a4 are the 1336.50mm place at the distance front end apart from a1 respectively then, adopt the method for scraping blade, strike off the active material of these four positions, thereby form four lug bonding pads.The width of these four lug bonding pads is all less than 1/2nd of pole piece width, and as Fig. 3 and shown in Figure 5, wherein, 8 for being the lug bonding pad at 172.05mm place apart from a1 apart from front end on the pole piece.
On these four lug bonding pads, adopt the mode of ultrasonic bonding to connect lug 4,5,6,7 successively, and the length of lug 4,5,6,7 increase progressively successively, as shown in Figure 3.Be separated by and be wound into electric core through barrier film with the corresponding negative plate that has above-mentioned same structure, has been connected lug afterwards, reel from a end near lug 4.Fig. 4 is the lug distribution vertical view on the electric core end face of this formation.As seen from Figure 4, on electric core end face, it is a sector region in the center of circle that lug is distributed in electric core center, and this fan-shaped angle α is 120 °, helps tortuous link together then of lug in the same direction and links to each other with corresponding polarity terminal.
In addition, because the length of lug 4,5,6,7 increases progressively gradually, as shown in Figure 3, on the lug distribution vertical view of Fig. 4 electricity core end face, the lug length far away more apart from electric core center is long more like this.After lug 4,5,6,7 interconnected, four lugs formed the trend of coming together towards electric core central axis.
Claims (14)
1, a kind of electrodes of lithium-ion batteries, comprise pole piece, it is characterized in that: be provided with a plurality of lugs bonding pad on the described pole piece with being non-uniform Distribution, described non-uniform Distribution is that described a plurality of lugs bonding pad is all concentrated being distributed in electric core center is in the sector region in the center of circle after pole piece forms electric core through reeling.
2, a kind of electrodes of lithium-ion batteries according to claim 1 is characterized in that: described sector region is that angle is not more than 140 ° sector region.
3, a kind of electrodes of lithium-ion batteries according to claim 1 and 2 is characterized in that: the width of the lug bonding pad on the described pole piece is no more than 1/2nd of pole piece width.
4, a kind of lithium ion battery cell, comprise positive plate and negative plate, it is characterized in that: just described, be provided with a plurality of lugs bonding pad with all being non-uniform Distribution on the negative plate, all be fixed with anode ear on each lug bonding pad on the positive plate, all be fixed with negative electrode lug on each lug bonding pad on the negative plate, described non-uniform Distribution is ought be just, after negative plate is separated by by barrier film and is formed electric core through reeling, each anode ear that stretches out electric core one end face is all concentrated being distributed in electric core center is in the sector region in the center of circle, and each negative electrode lug that stretches out electric core other end is all concentrated being distributed in electric core center is in the sector region in the center of circle.
5, a kind of lithium ion battery cell according to claim 4 is characterized in that: described sector region is that angle is not more than 140 ° sector region.
6, according to claim 4 or 5 described a kind of lithium ion battery cells, it is characterized in that: the width of the lug bonding pad on the described positive and negative plate is no more than 1/2nd of pole piece width.
7, a kind of manufacture method of electrodes of lithium-ion batteries, be included in the step that a plurality of lugs bonding pad is set with being non-uniform Distribution on the pole piece, described non-uniform Distribution is that described a plurality of lugs bonding pad is all concentrated being distributed in electric core center is in the sector region in the center of circle after pole piece forms electric core through reeling.
8, the manufacture method of a kind of electrodes of lithium-ion batteries according to claim 7 is characterized in that: described sector region is that angle is not more than 140 ° sector region.
9, according to the manufacture method of claim 7 or 8 described a kind of electrodes of lithium-ion batteries, it is characterized in that: the described method of a plurality of lugs bonding pad that is provided with on pole piece is for adopting the method for scraping blade, the method of described scraping blade is meant after pole piece all has been coated with active material, and the active material of position, bonding pad on the pole piece is struck off.
10, according to the manufacture method of claim 7 or 8 described a kind of electrodes of lithium-ion batteries, it is characterized in that: the described method of a plurality of lugs bonding pad that is provided with on pole piece is for adopting the white method of staying, describedly stay white method to be meant in coating on the pole piece to cover the lug bonding pad with veil before the active material, the coating back is removed veil and is formed the lug bonding pad.
11, a kind of manufacture method of lithium ion battery cell, be included in the step that is provided with a plurality of lugs bonding pad and the fixing step of lug on each lug bonding pad with being non-uniform Distribution on the positive and negative plate, described non-uniform Distribution is after positive and negative plate is separated by by barrier film and is formed electric core through reeling, each anode ear that stretches out electric core one end face is all concentrated being distributed in electric core center is in the sector region in the center of circle, and each negative electrode lug that stretches out electric core other end is all concentrated being distributed in electric core center is in the sector region in the center of circle.
12, the manufacture method of a kind of lithium ion battery cell according to claim 11 is characterized in that: described sector region is that angle is not more than 140 ° sector region.
13, according to the manufacture method of claim 11 or 12 described a kind of lithium ion battery cells, it is characterized in that: the length of described each lug along with lug from the increase of electric core centre distance and increase.
14, the manufacture method of a kind of lithium ion battery cell according to claim 13 is characterized in that: described on each lug bonding pad fixedly the mode of lug for adopting ultrasonic bonding, rivet welding or conductive adhesion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100215748A CN1921180A (en) | 2005-08-26 | 2005-08-26 | Lithium ion battery pole piece, electricity core and method for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100215748A CN1921180A (en) | 2005-08-26 | 2005-08-26 | Lithium ion battery pole piece, electricity core and method for making same |
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| Publication Number | Publication Date |
|---|---|
| CN1921180A true CN1921180A (en) | 2007-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2005100215748A Pending CN1921180A (en) | 2005-08-26 | 2005-08-26 | Lithium ion battery pole piece, electricity core and method for making same |
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| CN (1) | CN1921180A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600250A (en) * | 2014-11-21 | 2015-05-06 | 天津力神电池股份有限公司 | Preparation method of lithium ion battery multi-pole-ear pole piece, preparation method of pole group and battery |
| CN105355983A (en) * | 2015-11-30 | 2016-02-24 | 珠海格力电器股份有限公司 | Battery cell of lithium ion battery and lithium ion battery |
| CN106257710A (en) * | 2015-06-17 | 2016-12-28 | 深圳市沃特玛电池有限公司 | A kind of multi pole ears becomes the high multiplying power lithium ion battery of size |
| CN110061182A (en) * | 2019-05-21 | 2019-07-26 | 宁德新能源科技有限公司 | Battery pole piece and battery core |
| CN112117498A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of winding type battery cell, winding type battery cell and lithium battery |
| CN112117496A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of laminated battery cell, laminated battery cell and lithium battery |
| CN113661608A (en) * | 2020-12-22 | 2021-11-16 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11339758A (en) * | 1998-05-25 | 1999-12-10 | Toyota Central Res & Dev Lab Inc | Electrode winding type battery |
-
2005
- 2005-08-26 CN CNA2005100215748A patent/CN1921180A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11339758A (en) * | 1998-05-25 | 1999-12-10 | Toyota Central Res & Dev Lab Inc | Electrode winding type battery |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600250A (en) * | 2014-11-21 | 2015-05-06 | 天津力神电池股份有限公司 | Preparation method of lithium ion battery multi-pole-ear pole piece, preparation method of pole group and battery |
| CN106257710A (en) * | 2015-06-17 | 2016-12-28 | 深圳市沃特玛电池有限公司 | A kind of multi pole ears becomes the high multiplying power lithium ion battery of size |
| CN105355983A (en) * | 2015-11-30 | 2016-02-24 | 珠海格力电器股份有限公司 | Battery cell of lithium ion battery and lithium ion battery |
| AU2016364095B2 (en) * | 2015-11-30 | 2020-02-06 | Gree Electric Appliances, Inc. Of Zhuhai | Lithium-ion battery cell and lithium-ion battery |
| CN110061182A (en) * | 2019-05-21 | 2019-07-26 | 宁德新能源科技有限公司 | Battery pole piece and battery core |
| WO2020233141A1 (en) * | 2019-05-21 | 2020-11-26 | Ningde Amperex Technology Limited | Electrode sheet and battery cell |
| US11817543B2 (en) | 2019-05-21 | 2023-11-14 | Ningde Amperex Technology Limited | Electrode sheet and battery cell |
| CN112117498A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of winding type battery cell, winding type battery cell and lithium battery |
| CN112117496A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of laminated battery cell, laminated battery cell and lithium battery |
| CN113661608A (en) * | 2020-12-22 | 2021-11-16 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
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Open date: 20070228 |