CN102244209B - Square lithium ion power battery - Google Patents
Square lithium ion power battery Download PDFInfo
- Publication number
- CN102244209B CN102244209B CN2011101525075A CN201110152507A CN102244209B CN 102244209 B CN102244209 B CN 102244209B CN 2011101525075 A CN2011101525075 A CN 2011101525075A CN 201110152507 A CN201110152507 A CN 201110152507A CN 102244209 B CN102244209 B CN 102244209B
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- lug
- cover plate
- brace
- lithium ion
- spacer ring
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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 square lithium ion power battery, which is characterized in that a lug of a mandrel is placed at the outermost layer of the mandrel, the lug extends along the arc side surface of the mandrel and the extending direction of the lug is perpendicular to the arc side surface. An anode lug is threaded through a spacer and welded on a cover plate; a cathode lug is threaded through a spacer and welded on a connecting sheet. The anode/cathode lug and the connecting sheet are folded at the rear of a spacer groove, the spacer is fastened on an insulated rubber pad of the cover plate. The invention also provides a method for welding the cathode lug. The present invention has the advantages that a thin shell with wide and short shape is employed, the heat dissipation of the battery is good and the metal shell is easy to process for forming. The lug is arranged at the outermost layer of the mandrel, which avoids the problem of short circuit generated when the battery falls or the impacted lug and the connecting sheet enter in the mandrel. The method of welding cathode lug is capable of effectively inhibiting the disadvantage of easy rupture force of copper foil cathode lug when being smashed and being pulled by external force; an engagement structure of the spacer and the insulated rubber pad is employed for effectively preventing the poor positioning of the spacer.
Description
Technical field
The present invention relates to a kind of lithium-ion-power cell, relate in particular to the rectangular lithium ion electrokinetic cell of wide short, the thin thickness of a kind of profile.
Background technology
The profile of rectangular lithium ion electrokinetic cell all is narrow and high at present, and the positive pole ear of battery and negative lug have two big classes: the first kind is to use the hard lug, and second class is to use foil as lug.More than the position of two kinds of lugs all place on the long side of pole piece.After being rolled into electric core, lug is all drawn in the middle of the volume core, and lug stretches out direction and all is parallel to the arc-shaped side edges of rolling up core; During the welding negative electrode lug, be directly with welding equipment with the lug welding on the cover board, perhaps lug be directly welded on the brace on the cover plate that all the anticathode ear does not carry out double team; Spacer ring is also fixed.
There is following problem in the electrokinetic cell that above method is produced: when 1, producing square lithium-ion-power cell, if adopt the narrow and high square shell of profile, because of the restriction of metal shell processing technology, battery case can only be accomplished limited height, thereby make the finite volume of battery case, can not satisfy the requirement of actual production high-capacity power battery.Narrow and the high rectangular cell thickness of profile is bigger in addition, and battery can not well dispel the heat.2, the lug position is arranged on the long side of pole piece, be rolled into electric core after, lug is to draw in the middle of the core from volume, when battery fell or be subjected to external impact, lug and brace thereof were easy to enter volume in-core portion, cause battery short circuit.3, use the hard lug to cause the volume core in uneven thickness easily, thickness position bigger than normal can be amplified by accumulation when loading volume core group, causes cell thickness inhomogeneous.In addition the hard lug weigh wounded the volume core probability also bigger, have potential safety hazard.Do not carry out double team when 4, negative electrode lug welds, easily cause lug breakage, solder side to come off, thereby cause battery performance to descend and the initiation potential safety hazard.5, spacer ring is fixed, and when spacer ring was subjected to the extruding of external impacts or electric core, easy deformation or displacement caused the spacer ring location bad, and be easily fried fiery during the cover plate welding, and influences the security performance of battery.
Summary of the invention
The object of the present invention is to provide a kind of rectangular lithium ion electrokinetic cell, fill up the blank of the short model of large-scale rectangular lithium ion electrokinetic cell, and propose the difficulty that a kind of new lug is arranged reduction battery manufacturing process.The cover plate of supporting adaption demand and corresponding negative electrode lug welding method are to solve breakage, the solder side of foil matter lug when the welding problem that comes off.
Technical problem of the present invention is achieved through the following technical solutions.
A kind of rectangular lithium ion electrokinetic cell, it comprises metal shell, cover plate, spacer ring, by rolling up battery roll core group and the electrolyte of can in shell that core is formed, the volume core comprises anode pole piece, positive pole ear, barrier film, cathode pole piece, negative lug, the volume core adopts the horizontal type loading method, it is characterized in that: the lug of volume core is positioned at the outermost layer of volume core, the curved side surface of edge volume core is stretched out and lug stretches out direction perpendicular to the curved side surface, described anode ear passes the spacer ring welding on the cover board, negative electrode lug passes spacer ring and is welded on the cover plate brace, just/after negative electrode lug and brace are folded in the spacer ring groove, spacer ring is fastened on the cover plate insulation rubber cushion.
The volume core monomer number of described pond volume core group is one or more.
Wide short, the thin thickness of described metal shell profile, shell length is greater than the housing height;
Described positive pole ear is positioned at the afterbody of anode pole piece, and on positive plate collector foil die-cut obtaining; Described negative lug is positioned at the afterbody of cathode pole piece, and on negative plate collector foil die-cut obtaining.
Described negative pole brace is made up of " L " shape metallic conductor, and its length is not more than cover plate length, and width is not more than platform width in the cover plate, and material can be one or more in copper, stainless steel, the nickel;
There is a small boss at described cover plate insulation rubber cushion middle part, and the spacer ring middle part arranges a spill draw-in groove, and the cover plate rubber cushion middle part small boss that insulate is pressed in the spill draw-in groove of spacer ring middle part, and both are fastened.
Welding is positioned over negative electrode lug on the brace during negative pole, after the brace bending with the negative electrode lug double team in the middle of brace, brace and negative electrode lug are welded together.
The welding manner of described lug and brace can adopt in fixing one or more of ultrasonic bond, electric resistance welding, riveted joint or screw.
Technique effect of the present invention is: adopt wide short, the thin thickness housing of profile, the battery thermal diffusivity is good, and the easy machine-shaping of metal shell, can satisfy the requirement of actual production high-capacity power battery, lug is arranged on the outermost layer of volume core, can avoid battery to fall or when being subjected to clashing into lug and brace thereof enter volume in-core portion and cause problem of short-circuit.Negative electrode lug clamped be crashed to pieces when welding has effectively suppressed the welding of Copper Foil matter negative electrode lug and the drawback of easy fracture when pullled by external force; Adopt spacer ring and cover plate insulation rubber cushion occlusion structure, can prevent effectively that the spacer ring location is bad.
Description of drawings
Fig. 1 is metal shell schematic diagram according to the preferred embodiment of the invention;
Fig. 2 is the pole piece schematic diagram;
Fig. 3 is monomer volume core schematic diagram;
Fig. 4 is the A-A structural entity schematic diagram of cover plate coupling assembling;
Fig. 5 is the structural entity schematic diagram of cover plate coupling assembling;
Fig. 6 is the spacer ring schematic diagram;
Fig. 7 is insulation rubber cushion middle part small boss enlarged diagram;
Fig. 8 spacer ring middle part spill draw-in groove enlarged diagram;
Fig. 9 is negative electrode lug welding schematic diagram.
Embodiment
Below in conjunction with accompanying drawing 1,2,3,4,5,6,7,8,9 the preferred embodiments of the present invention are described.
A kind of rectangular lithium ion electrokinetic cell, comprise metal shell 1, cover plate assembly 2, spacer ring 3, by battery roll core group and the electrolyte of can in shell that volume core 4 is formed, roll up core 4 and comprise anode pole piece 5, positive pole ear 7-1, barrier film, cathode pole piece 6, negative lug 7-2.
Just making earlier/negative plate, when anodal coating and negative pole coating, reserving positive and negative lug position at the pole piece afterbody on request, keeping the foil of certain width and length then as lug, remainder is dismissed.As depicted in figs. 1 and 2, lug stretches out the long side line that direction is parallel to pole piece.Negative electrode lug 7-2 except with the foil of cover plate 2 welding positions, remainder all coats high tempreture tape, causes short circuit to prevent that the anode foil material from contacting with shell wall with positive plate.
The volume core 4 of winding is made rolling core groups, adopt the horizontal type loading method to pack in the housing after the preliminary treatment of volume core group, namely the opposite side curved side surface that does not have lug 7 metal shell of packing into downwards.Anode ear 7-1 passes spacer ring 3 and is welded on the cover plate 2, and negative electrode lug 7-2 passes spacer ring 3 and is welded on the cover plate brace 2-1.During the negative electrode lug welding, negative electrode lug is placed on " L " type brace 2-1, after brace 2-1 is bent negative electrode lug 7-2 is clipped in the middle of the brace 2-1, brace 2-1 and negative electrode lug 7-2 are welded together.
With anode ear 7-1 folding with spacer ring groove 3-1 in, negative electrode lug 7-2 and brace 2-1 are folded in the spacer ring groove 3-1, the cover plate rubber cushion 2-2 middle part small boss 2-2-1 that insulate is pressed in the spill draw-in groove 3-2 of spacer ring middle part, make cover plate insulation cushion 2-2 and spacer ring 3 interlocks.
The above only is preferred embodiment of the present invention; not in order to limit the present invention; should be understood that; for the person of ordinary skill of the art; every any modification of doing within the spirit and principles in the present invention, be equal to and replace or improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. rectangular lithium ion electrokinetic cell, it comprises metal shell, cover plate, spacer ring, by rolling up battery roll core group and the electrolyte of can in shell that core is formed, the volume core comprises anode pole piece, positive pole ear, barrier film, cathode pole piece, negative lug, the volume core adopts the horizontal type loading method, it is characterized in that: the lug of volume core is positioned at the outermost layer of volume core, the curved side surface of edge volume core is stretched out and lug stretches out direction perpendicular to the curved side surface, described anode ear passes the spacer ring welding on the cover board, negative electrode lug passes spacer ring and is welded on the cover plate brace, after anode ear and negative electrode lug and brace are folded in the spacer ring groove, spacer ring is fastened on the cover plate insulation rubber cushion.
2. according to the described a kind of rectangular lithium ion electrokinetic cell of claim 1, it is characterized in that the volume core monomer number of described battery roll core group is one or more.
3. according to the described a kind of rectangular lithium ion electrokinetic cell of claim 1, it is characterized in that wide short, the thin thickness of described metal shell profile, shell length is greater than the housing height.
4. according to the described a kind of rectangular lithium ion electrokinetic cell of claim 1, it is characterized in that described positive pole ear is positioned at the afterbody of anode pole piece, and on positive plate collector foil die-cut obtaining; Described negative lug is positioned at the afterbody of cathode pole piece, and on negative plate collector foil die-cut obtaining.
5. according to claim 1 or 4 described a kind of rectangular lithium ion electrokinetic cells, it is characterized in that described negative pole brace is made up of " L " shape metallic conductor, its length is not more than cover plate length, and width is not more than platform width in the cover plate, and material can be one or more in copper, stainless steel, the nickel.
6. according to claim 1 or 4 described a kind of rectangular lithium ion electrokinetic cells, it is characterized in that there is a small boss at described cover plate insulation rubber cushion middle part, spacer ring middle part arranges a spill draw-in groove, and the cover plate rubber cushion middle part small boss that insulate is pressed in the spill draw-in groove of spacer ring middle part, and both are fastened.
7. rectangular lithium ion electrokinetic cell according to claim 6 when it is characterized in that welding negative pole, is positioned over negative electrode lug on the brace, after the brace bending with the negative electrode lug double team in the middle of brace, brace and negative electrode lug are welded together.
8. according to claims 7 described lithium-ion-power cells, the welding manner that it is characterized in that described lug and brace can adopt in fixing one or both of ultrasonic bond or electric resistance welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101525075A CN102244209B (en) | 2011-06-09 | 2011-06-09 | Square lithium ion power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101525075A CN102244209B (en) | 2011-06-09 | 2011-06-09 | Square lithium ion power battery |
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| Publication Number | Publication Date |
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| CN102244209A CN102244209A (en) | 2011-11-16 |
| CN102244209B true CN102244209B (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101525075A Active CN102244209B (en) | 2011-06-09 | 2011-06-09 | Square lithium ion power battery |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199202A (en) * | 2013-03-19 | 2013-07-10 | 东莞市力嘉电池有限公司 | Lithium ion power battery |
| CN105206765A (en) * | 2015-08-17 | 2015-12-30 | 合肥国轩高科动力能源有限公司 | Lithium battery multi-tab process welding cover plate |
| CN108417887A (en) * | 2018-05-21 | 2018-08-17 | 东莞塔菲尔新能源科技有限公司 | A kind of high power type lithium ion cell and preparation method thereof |
| CN109378436A (en) * | 2018-12-05 | 2019-02-22 | 珠海光宇电池有限公司 | Tab and the lithium ion battery for using the tab |
| CN109888406A (en) * | 2019-01-25 | 2019-06-14 | 东莞市海商泰通讯科技有限公司 | 1 to No. 7 solid lithium ion rechargeable battery |
| CN113363634B (en) * | 2019-05-15 | 2023-08-04 | 广东微电新能源有限公司 | Button cell and method for manufacturing same |
| CN110931888A (en) * | 2019-12-05 | 2020-03-27 | 昆山兴能能源科技有限公司 | Assembling method of button lithium secondary battery |
| CN112792448B (en) * | 2021-01-13 | 2022-07-19 | 瑞浦兰钧能源股份有限公司 | Method for improving welding reliability of power battery tab |
| CN113903971A (en) * | 2021-09-26 | 2022-01-07 | 中安芯界(莱西)新能源科技有限公司 | Slat battery chip |
| CN114335919B (en) * | 2021-12-22 | 2024-03-08 | 江苏海基新能源股份有限公司 | Square metal shell lithium ion battery and assembly process thereof |
| CN114597473A (en) * | 2022-03-17 | 2022-06-07 | 合肥国轩高科动力能源有限公司 | Lithium battery manufacturing method and lithium battery |
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| CN1770538A (en) * | 2005-04-11 | 2006-05-10 | 深圳市比克电池有限公司 | Method for making winding type lithium ion battery battery core, battery and battery core and battery |
| CN101005127A (en) * | 2006-01-20 | 2007-07-25 | 深圳市比克电池有限公司 | Winding type battery |
| CN201178103Y (en) * | 2007-11-24 | 2009-01-07 | 比亚迪股份有限公司 | Lithium ionic cell spacer and lithium ionic cell comprising the spacer |
| CN101645520A (en) * | 2008-08-08 | 2010-02-10 | 深圳市比克电池有限公司 | Battery assembly method |
| CN201681990U (en) * | 2010-05-25 | 2010-12-22 | 吉安市优特利科技有限公司 | Lithium ion battery space ring |
| CN201717337U (en) * | 2010-08-03 | 2011-01-19 | 深圳市东方华联科技有限公司 | Rolled lithium ion battery |
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2011
- 2011-06-09 CN CN2011101525075A patent/CN102244209B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1770538A (en) * | 2005-04-11 | 2006-05-10 | 深圳市比克电池有限公司 | Method for making winding type lithium ion battery battery core, battery and battery core and battery |
| CN101005127A (en) * | 2006-01-20 | 2007-07-25 | 深圳市比克电池有限公司 | Winding type battery |
| CN201178103Y (en) * | 2007-11-24 | 2009-01-07 | 比亚迪股份有限公司 | Lithium ionic cell spacer and lithium ionic cell comprising the spacer |
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| Publication number | Publication date |
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| CN102244209A (en) | 2011-11-16 |
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