CN202601777U - Large-capacity high-magnification square lithium ion power battery - Google Patents
Large-capacity high-magnification square lithium ion power battery Download PDFInfo
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- CN202601777U CN202601777U CN2012202471848U CN201220247184U CN202601777U CN 202601777 U CN202601777 U CN 202601777U CN 2012202471848 U CN2012202471848 U CN 2012202471848U CN 201220247184 U CN201220247184 U CN 201220247184U CN 202601777 U CN202601777 U CN 202601777U
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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 large-capacity high-magnification square lithium ion power battery. The power battery comprises a battery core, wherein the battery core comprises a negative plate with a plurality of negative blanks arranged on one side, a positive plate with a plurality of positive blanks arranged on one side, and a diaphragm arranged between the negative plate and the positive plate; the negative blanks on the negative plates extend from one side of the diaphragm; the positive blanks on the positive plate extend from the other side of the diaphragm; the battery core is formed by stacking and winding the negative plate, the diaphragm and the positive plate; all the negative blanks are overlapped neatly; all the positive blanks are overlapped neatly; negative tabs are welded on the negative blanks; and positive tabs are welded on the positive blanks. According to the utility model, as a novel coating method and a novel pole sheet slitting manner are adopted, the combination of lamination and winding is achieved and the consumption of connecting bars is reduced at the same time, so that the production efficiency is improved, the production cost is reduced, the battery internal resistance is decreased, the battery discharge platform is promoted, and the safety of the battery is improved.
Description
[technical field]
The utility model relates to big capacity high magnification rectangular lithium ion electrokinetic cell and manufacturing approach thereof, belongs to field of batteries, particularly relates to a kind of structure and manufacturing approach with secondary lithium battery that discharges and recharges of big capacity, high-rate discharge ability.
[background technology]
Lithium ion battery is remarkable environmental protection of new generation, a reproducible chemical energy source of performance, at present just with other battery the advantage that can not compare captured applications such as mobile phone, notebook computer, miniature camera, digital camera, electric tool, electric automobile rapidly.The parent that the electrokinetic cell that capacity is high, volume is little, security performance is good more and more receives the consumer looks at.
Conventional square lithium ion battery moulding at present mainly is divided into takeup type and stacked, and these two kinds of equipment modes respectively have pluses and minuses: the takeup type core strueture is simple, specific energy is big, but internal resistance is bigger, is unfavorable for heavy-current discharge; The lamination type electric core pole piece is short, the internal resistance of cell is less, helps high current charge-discharge, but pole piece is many in the actual production, and side cut is many, and production efficiency is low, and is unfavorable for controlling the pole piece burrs on edges.Adopt comprehensively both advantages of multipole ear production method, realize quick charge and heavy-current discharge.At present, the manufacture method of multipole ear battery realizes through a plurality of intercell connectors of welding on the both positive and negative polarity pole piece, has announced a kind of manufacturing approach of multi-pole lug lithium ion battery among the patent CN101714624A; A plurality of lugs of spot welding on positive and negative plate respectively; And the spacing of lug is followed the helix polar equation, and the characteristics of this utility model are that the lug of same polarity is in the neat arrangement in top of volume core after reeling; Though the big current work ability of the raising battery that this mode can be to a certain degree; But lug welding site is wayward, trivial operations, and production efficiency is low; The use of a plurality of lugs has simultaneously improved production cost, and a plurality of lugs of welding have increased the internal resistance of battery on the pole piece, have limited the further lifting of battery multiplying power discharging property.
[utility model content]
The purpose of the utility model solves the problems of the prior art exactly, proposes a kind of big capacity high magnification rectangular lithium ion electrokinetic cell, and is can either core strueture simple, specific energy is big; Again can internal resistance less, help high current charge-discharge, simultaneously; Reduce cost, enhance productivity.
For realizing above-mentioned purpose, the utility model has also proposed a kind of big capacity high magnification rectangular lithium ion electrokinetic cell, comprises electric core; Said electric core comprises that a side is provided with some negative poles blank negative plate, a side and is provided with some anodal blank positive plate, barrier films, between negative plate and the positive plate barrier film is set, and all the negative pole blank on the negative plate are stretched out in a side of barrier film; The anodal blank opposite side at barrier film of on the positive plate all stretches out; Negative plate, barrier film and positive plate stack the back of reeling and form electric core, and all negative pole blank are neatly overlapping, and all anodal blank are neatly overlapping; Be welded with negative electrode lug on the said negative pole blank, be welded with anode ear on the anodal blank.
As preferably, the width of said barrier film is than the big 2～3mm of width of negative plate, and the width of negative plate is than the big 1～2mm of width of positive plate.
As preferably, after said negative plate, barrier film and positive plate stack the electric core of back formation of reeling, anodal blank is arranged all on every layer of positive plate, all there is negative pole blank on every layer of negative plate.
As preferably, said anode ear is in a side of electric core, and negative electrode lug is at the opposite side of electric core.
As preferably, the width of said anode ear equals anodal blank width, and the width of negative electrode lug equals the blank width of negative pole.
The beneficial effect of the utility model: the utility model adopts new applying structure and new pole piece cutting structure; Produce the electrode slice of " concavo-convex linking to each other ", behind the pole piece coiling, outstanding collector partly substitutes intercell connector and links to each other with lug; Both realized the combination of lamination and coiling; Reduce the use of intercell connector again, improved production efficiency on the one hand, reduced production cost; The situation of having avoided the internal resistance that a plurality of intercell connectors of welding cause on the pole piece to increase on the other hand.The utility model of the electrode slice of this kind " concavo-convex link to each other " shape has fundamentally realized the perfect combination of coiling and lamination mode, and the comprehensive internal resistance of cell that reduces has at many levels promoted the discharge platform of battery; Heat when having reduced discharge simultaneously generates the fail safe that has improved battery.The winding method that the utility model has thoroughly solved present existence is not suitable for the relatively poor and not easy-operating problem of security performance of great-capacity power battery and stacked battery, and the development and application of big capacity high magnification rectangular lithium ion electrokinetic cell is had great importance.
Characteristic of the utility model and advantage will combine accompanying drawing to be elaborated through embodiment.
[description of drawings]
Fig. 1 is the structural representation of the plus plate current-collecting body after the coating related in the utility model;
Fig. 2 is the structural representation of the negative current collector after the coating related in the utility model;
Fig. 3 is the sketch map of the plus plate current-collecting body cutting process after the coating related in the utility model;
Fig. 4 is the sketch map of the negative current collector cutting process after the coating related in the utility model;
Fig. 5 is the structural representation of the single positive plate that obtains after the plus plate current-collecting body after the coating related in the utility model is cut;
Fig. 6 is the structural representation that the negative current collector after the coating related in the utility model is cut the single negative plate that obtains;
Fig. 7 is the structural representation of electric core in a kind of big capacity high magnification rectangular lithium ion electrokinetic cell of the utility model;
Fig. 8 is the structural representation of anode ear in a kind of big capacity high magnification rectangular lithium ion electrokinetic cell of the utility model;
Fig. 9 is the structural representation of negative electrode lug in a kind of big capacity high magnification rectangular lithium ion electrokinetic cell in the utility model.
[embodiment]
The manufacturing approach of big capacity high magnification rectangular lithium ion electrokinetic cell may further comprise the steps successively:
A) consult Fig. 1; Process anode sizing agent after adopting active material, conductive agent and binding agent fully to mix by a certain percentage; Adopt coating machine that anode sizing agent is coated on the plus plate current-collecting body, reserve anodal blankly 12 in the centre position of the frontal width direction of plus plate current-collecting body, an anodal side of blank 12 is coated with the first anode sizing agent layer 11; Anodal blank 12 opposite side be coated with the second anode sizing agent layer, 13, the first anode sizing agent layer 11 and the second anode sizing agent layer, 13 paste composition identical.The first anode sizing agent layer 11, the second anode sizing agent layer 13 and anodal blank 12 identical length etc.; The width of the first anode sizing agent layer 11 and the second anode sizing agent layer 13 equates; The centre position of Width reserves anodal blank 12 at the back side of plus plate current-collecting body; An anodal side of blank 12 is coated with the first anode sizing agent layer 11; Anodal blank 12 opposite side is coated with the second anode sizing agent layer, 13, the first anode sizing agent layer 11, the second anode sizing agent layer 13 and anodal blank 12 identical length etc., and the width of the first anode sizing agent layer 11 and the second anode sizing agent layer 13 is equal; The first anode sizing agent layer 11 and the second anode sizing agent layer, 13 paste composition are identical.The mass ratio of active material, conductive agent and binding agent is in the anode sizing agent: 88～93%, 3～6%, 3～6%; Anodal active material adopts one or more in LiMn2O4, cobalt acid lithium, nickle cobalt lithium manganate, the LiFePO4, and conductive agent adopts superconduction carbon black or electrically conductive graphite, and binding agent adopts Kynoar.
B) consult Fig. 2; Process cathode size after adopting active material, conductive agent and binding agent fully to mix by a certain percentage; Adopt coating machine that cathode size is coated on the negative current collector; Reserve negative pole in the centre position of the frontal width direction of negative current collector blank 22, and a side of negative pole blank 22 is coated with the identical length of the first slurry bed of material, 21, the first slurry bed of materials 21, the second slurry bed of material 23 and negative pole blank 22 etc.; The width of the first slurry bed of material 21 and the second slurry bed of material 23 equates; Negative pole blank 22 is reserved in the centre position of Width at the back side of negative current collector, and a side of negative pole blank 22 is coated with the first slurry bed of material 21, and the opposite side of negative pole blank 22 is coated with the second slurry bed of material 23; The identical length of the first slurry bed of material 21, the second slurry bed of material 23 and negative pole blank 22 etc., the width of the first slurry bed of material 21 and the second slurry bed of material 23 is equal; The first slurry bed of material 21 and the second slurry bed of material, 23 paste compositions are identical.The mass ratio of active material, conductive agent and binding agent is in the cathode size: 90～95%, 2～5%, 2～5%.The active material of negative pole adopts native graphite or Delanium, and conductive agent adopts superconduction carbon black or electrically conductive graphite, and binding agent adopts aqueous binder.
C) consult Fig. 3,5; Plus plate current-collecting body after applying is carried out symmetry cuts; Obtain the positive plate of two strips and consistent size after cutting, it is that blank 12 places of positive pole are cut that symmetry is cut, and keeps some blank aluminium foils 32; Cut away anodal left end excise empty paper tinsel 31, some anodal in the middle of the empty paper tinsels 33 of excision and anodal right-hand member excise empty paper tinsel 34, establishing the length that anodal left end excises empty paper tinsel 31 is W
31, the length that keeps some blank aluminium foils 32 is W
32, the length of the empty paper tinsel 33 of anodal middle excision is W
33, the length that anodal right-hand member excises empty paper tinsel 34 is W
34, W then
33=2W
31=2W
34, and W
32+ W
31+ 1/2W
33=volume core width; Volume core width is meant e) negative plate, barrier film and positive plate are wound into whole width behind the electric core in the step.The length W of the empty paper tinsel 33 of excision in the middle of anodal
33Be 1～2.5cm.The width of blank aluminium foil 32 during with coating the width of anodal blank 12 (or title: positive pole stays white) identical.
D) consult Fig. 4,6; Negative current collector after applying is carried out symmetry cuts; Obtain the negative plate of two strips and consistent size after cutting, it is that blank 22 places of anticathode cut that symmetry is cut, and keeps some blank Copper Foils 42; Cut away the negative pole left end and excise that the empty paper tinsel 43 of excision and negative pole right-hand member excise empty paper tinsel 44 in the middle of empty paper tinsel 41, the some negative poles, establishing the length that the negative pole left end excises empty paper tinsel 41 is W
41, the length that keeps some blank Copper Foils 42 is W
42, the length of the empty paper tinsel 43 of excision is W in the middle of the negative pole
43, the length that the negative pole right-hand member excises empty paper tinsel 44 is W
44, W then
43=2W
41=2W
44, and W
42+ W
41+ 1/2W
43=volume core width; Volume core width is meant e) negative plate, barrier film and positive plate are wound into whole width behind the electric core in the step.The length W of the empty paper tinsel 43 of excision in the middle of the negative pole
43Be 1～2.5cm.The width of the width of blank Copper Foil 42 negative pole blank 22 (or title: negative pole stays white) during with coating is identical.
E) consult Fig. 7, adopt the mode of reeling, negative plate is placed on the barrier film; With barrier film negative plate is wrapped, the blank Copper Foil 42 on the negative plate stretches out in a side of barrier film, behind the volume half-turn; Positive plate is inserted between volume pin and the barrier film, and the blank aluminium foil 32 on the positive plate stretches out at the opposite side of barrier film, then negative plate, barrier film and positive plate is wound into electric core; Barrier film is centered around electric core outer ring, fixes with the termination adhesive tape, behind the coiling; Blank Copper Foil 42 in electric core one side neatly stacks, and neatly stacks at the blank aluminium foil 32 of electric core opposite side; The width of barrier film is than the big 2～3mm of width of negative plate, and the width of negative plate is than the big 1～2mm of width of positive plate.
F) consult Fig. 8,9, the blank Copper Foil 42 of electric core one side of negative electrode lug and winding is welded, welding wraps with Kapton Tape after accomplishing; The blank aluminium foil 32 of the electric core opposite side of anode ear and winding is welded, and welding wraps with Kapton Tape after accomplishing.
The electric core that g) will be welded with anode ear and negative electrode lug encapsulates successively, vacuumize, fluid injection, seal, change into, shaping, partial volume and aging, obtain big capacity high magnification rectangular lithium ion electrokinetic cell.
Consult Fig. 7, big capacity high magnification rectangular lithium ion electrokinetic cell comprises electric core; Said electric core comprises that a side is provided with positive plate, barrier film that the negative plate of some blank Copper Foils 42, a side are provided with some blank aluminium foils 32, between negative plate and the positive plate barrier film is set, and all negative poles blank 22 on the negative plate are stretched out in a side of barrier film; The blank aluminium foil 32 of on the positive plate all stretches out at the opposite side of barrier film; Negative plate, barrier film and positive plate stack the back of reeling and form electric core, and all blank Copper Foils 42 are neatly overlapping, and all blank aluminium foils 32 are neatly overlapping; Be welded with negative electrode lug on the blank Copper Foil 42; Blank Copper Foil 42 is enclosed with adhesive tape with the weld of negative electrode lug, is welded with anode ear on the blank aluminium foil 32, and blank aluminium foil 32 is enclosed with adhesive tape with the weld of anode ear; The width of said barrier film is than the big 2～3mm of width of negative plate, and the width of negative plate is than the big 1～2mm of width of positive plate.
The foregoing description is the explanation to the utility model, is not the qualification to the utility model, any protection range that scheme after the utility model simple transformation is all belonged to the utility model.
Claims (5)
1. big capacity high magnification rectangular lithium ion electrokinetic cell; It is characterized in that: comprise electric core; Said electric core comprises that negative plate, a side that a side is provided with some negative poles blank (22) are provided with positive plate, the barrier film of some anodal blank (12), be provided with barrier film between negative plate and the positive plate, and all negative poles blank (22) on the negative plate are stretched out in a side of barrier film; On the positive plate all anodal blank (12) are stretched out at the opposite side of barrier film; Negative plate, barrier film and positive plate stack the back of reeling and form electric core, and all negative poles blank (22) are neatly overlapping, and all anodal blank (12) are neatly overlapping; Said negative pole is welded with negative electrode lug on blank (22), is welded with anode ear on anodal blank (12).
2. big capacity high magnification rectangular lithium ion electrokinetic cell as claimed in claim 1 is characterized in that: the width of said barrier film is than the big 2～3mm of width of negative plate, and the width of negative plate is than the big 1～2mm of width of positive plate.
3. big capacity high magnification rectangular lithium ion electrokinetic cell as claimed in claim 1; It is characterized in that: after said negative plate, barrier film and positive plate stack the electric core of back formation of reeling; Anodal blank (12) are all arranged on every layer of positive plate, negative pole blank (22) is all arranged on every layer of negative plate.
4. big capacity high magnification rectangular lithium ion electrokinetic cell as claimed in claim 1, it is characterized in that: said anode ear is in a side of electric core, and negative electrode lug is at the opposite side of electric core.
5. big capacity high magnification rectangular lithium ion electrokinetic cell as claimed in claim 1 is characterized in that: the width of said anode ear equals the width of anodal blank (12), and the width of negative electrode lug equals the width of negative pole blank (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202471848U CN202601777U (en) | 2012-05-25 | 2012-05-25 | Large-capacity high-magnification square lithium ion power battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202471848U CN202601777U (en) | 2012-05-25 | 2012-05-25 | Large-capacity high-magnification square lithium ion power battery |
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| CN202601777U true CN202601777U (en) | 2012-12-12 |
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| CN2012202471848U Expired - Fee Related CN202601777U (en) | 2012-05-25 | 2012-05-25 | Large-capacity high-magnification square lithium ion power battery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236565A (en) * | 2013-04-18 | 2013-08-07 | 徐敖奎 | Winding-type square lithium ion battery and manufacturing process thereof |
| CN105552428A (en) * | 2016-01-26 | 2016-05-04 | 中山市众旺德新能源科技有限公司 | Manufacturing method for high-rate lithium ion battery, and high-rate lithium ion battery |
| WO2018001164A1 (en) * | 2016-06-27 | 2018-01-04 | 宁德时代新能源科技股份有限公司 | Cell and battery using same |
| CN108461700A (en) * | 2018-02-02 | 2018-08-28 | 惠州拓邦电气技术有限公司 | A kind of full lug type lithium battery of high magnification and preparation method thereof |
| CN110233238A (en) * | 2019-01-31 | 2019-09-13 | 张龙涛 | A kind of lithium battery positive electrode plate and negative electrode plate of lithium ion battery of included tab, battery core and preparation method thereof |
| CN110828770A (en) * | 2019-11-19 | 2020-02-21 | 凌帕新能源科技(上海)有限公司 | Manufacturing method of lithium battery |
-
2012
- 2012-05-25 CN CN2012202471848U patent/CN202601777U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236565A (en) * | 2013-04-18 | 2013-08-07 | 徐敖奎 | Winding-type square lithium ion battery and manufacturing process thereof |
| CN103236565B (en) * | 2013-04-18 | 2015-10-28 | 徐敖奎 | A kind of takeup type square lithium ion battery |
| CN105552428A (en) * | 2016-01-26 | 2016-05-04 | 中山市众旺德新能源科技有限公司 | Manufacturing method for high-rate lithium ion battery, and high-rate lithium ion battery |
| CN105552428B (en) * | 2016-01-26 | 2018-01-09 | 中山市众旺德新能源科技有限公司 | A kind of preparation method of high multiplying power lithium ion battery |
| WO2018001164A1 (en) * | 2016-06-27 | 2018-01-04 | 宁德时代新能源科技股份有限公司 | Cell and battery using same |
| CN108461700A (en) * | 2018-02-02 | 2018-08-28 | 惠州拓邦电气技术有限公司 | A kind of full lug type lithium battery of high magnification and preparation method thereof |
| CN108461700B (en) * | 2018-02-02 | 2024-01-02 | 惠州拓邦电气技术有限公司 | High-rate full-tab lithium battery and preparation method thereof |
| CN110233238A (en) * | 2019-01-31 | 2019-09-13 | 张龙涛 | A kind of lithium battery positive electrode plate and negative electrode plate of lithium ion battery of included tab, battery core and preparation method thereof |
| CN110828770A (en) * | 2019-11-19 | 2020-02-21 | 凌帕新能源科技(上海)有限公司 | Manufacturing method of lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20150525 |
|
| EXPY | Termination of patent right or utility model |