CN201936925U - Lithium ion secondary battery with circular cores and square casing - Google Patents
Lithium ion secondary battery with circular cores and square casing Download PDFInfo
- Publication number
- CN201936925U CN201936925U CN2011200448857U CN201120044885U CN201936925U CN 201936925 U CN201936925 U CN 201936925U CN 2011200448857 U CN2011200448857 U CN 2011200448857U CN 201120044885 U CN201120044885 U CN 201120044885U CN 201936925 U CN201936925 U CN 201936925U
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- Prior art keywords
- core
- lithium ion
- negative pole
- ion secondary
- housing
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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
A lithium ion secondary battery with circular cores and a square casing comprises the casing, a battery core assembled in the casing and a tab connecting piece. The casing is the square casing with a fixed circular cavity, the battery core is formed by 2-20 cylindrical rolling cores arranged side by side and in parallel connection, the cylindrical rolling cores side by side and in parallel connection are arranged in the circular cavity of the square casing, the dimension of each cylindrical rolling core is adaptive to that of the circular cavity of the casing, a positive tab of each cylindrical rolling core is welded on the casing or a bottom cover plate, one end in the square casing is provided with a negative electrode connecting strip connected with the cylindrical rolling cores, and the negative electrode connecting strip is connected with a negative electrode connecting post arranged on an upper cover of the casing. The lithium ion secondary battery is simple and stable in electrical structure, fine in reliability, excellent in heat dissipation performance, small in internal resistance, stable in electrical performance and low in production cost, and can be widely applicable to electric tools, electric bicycles, electric motorcycles, mopeds, electric vehicles and the like.
Description
Technical field
The utility model relates to a kind of lithium ion battery; Especially relate to a kind of high-power lithium ion power secondary cell.
Background technology
The structure of existing high-power lithium ion electrokinetic cell has three kinds usually: one of them is a cylinder monomer 20Ah structure, and it comprises case top lid, housing, positive pole ear, lower gasket, goes up sealing gasket, negative pole, volume core.This structural requirement pole piece is longer, diameter is bigger after being wound into the cylindrical roll core, after being fitted into shell, battery is unfavorable for distributing of heat in charge and discharge process, and then influence the stable of battery electrical property, and long because of pole piece, the bad meeting of a pole piece causes more waste, thereby causes higher fraction defective.Wherein two are coiling square monomer 20Ah structures, its by housing, lug brace, lower seal pad, go up sealing gasket, outside connect double-screw bolt, outward connect pad, connect clamp nut outward and rivet constitutes.The battery of this structure, maximum disadvantage is that its inner a plurality of volume cores in parallel are oval structure, oval structure is not the most stable form, and it can cause that the applying between pole piece plays pendulum in the electric core in electric core, thereby causes the consistency of battery to differ greatly.The third is a lamination square monomer 20Ah structure, and the battery of this structure is rolled up core for the stack of multilayer pole piece except that it, and other accessory and assembling mode are identical with coiling square monomer 20Ah structure.Its shortcoming is: electric core is that the multilayer pole piece is superimposed, and its make efficiency is too low.
China utility model patent CN 201020162903.7 discloses a kind of round core side case lithium ion secondary cell, and its column type volume core parallel connection side by side is assemblied in steel, the aluminium side's shell, in the gap between each pitch circle column type electricity core in parallel side by side anticorrosion packing material is housed.Used anticorrosion packing material had both increased production cost, brought adverse effect for again the structural stability and the heat conduction and heat radiation performance of electric core, and was unfavorable for full automatic mechanization production.
The utility model content
The utility model purpose is to overcome the above-mentioned defective that existing lithium rechargeable battery exists, and provides a kind of capacity big, and electrical property is more stable, the round core side case lithium ion secondary cell that heat dispersion is better.
The technical solution of the utility model is: it comprises housing, be assemblied in the electric core in the housing, positive and negative lug brace (or, when being positive pole with the housing, then only establish the negative electrode lug brace), it is characterized in that, described housing is that the fixedly square shell of circular cavity is arranged, described electric core is formed in parallel side by side by 2-20 pitch circle column type volume core, described each pitch circle column type volume core in parallel side by side places the circular cavity of described side's shell, the circular cavity size of described column type volume core size and housing adapts, the two ends of symmetry are respectively equipped with and roll up anodal connecting band that core is connected and negative pole connecting band when being positive pole with the housing (or only be provided with negative electrode lug brace) in described side's shell, and connecting band links to each other with the polarity joint pin that is welded in case top lid.
When being provided with anodal connecting band in the described housing, can rivet by aluminium rivet between the outer anodal joint pin of anodal connecting band and housing, also can be by super weldering or Laser Welding welding; When housing is anodal when charged, need not adopt anodal connecting band, the anode ear of the inner circular column type volume heart can directly be welded on the housing by super weldering or Laser Welding, or is welded on the bottom plate.
Can rivet by copper rivet between negative pole connecting band in the described housing and the negative pole joint pin outside the housing, also can be by electric resistance welding or Laser Welding welding.
The diameter of described single column type volume core is preferably 14.0-40.0mm, highly is preferably 50.0-100.0mm.
Gap between described volume core and the volume core can be 0-1mm, is preferably 0.5mm.
Between positive strap and negative pole joint pin, should install explosion-proof valve.
Described housing can adopt the moulding of aluminium extrusion mode.
Advantage of the present utility model: the battery of this structure helps realizing mechanization and automated production because of the internal electrical core is a cylindrical electrical core, improves the consistency of volume core; Adopt the square aluminum hull of band circular cavity, make battery structure fixing more convenient and stable, thereby battery electrical property is more stable, and aluminum is easily processed, cost is low, greatly reduces production cost; Battery capacity is increased many cylindrical electrical core parallel connections, internal resistance reduces, and battery electrical property is more stable; And the parallel connection of many cylinders makes electric core form flat-square-shaped outward, compares the radiating surface that has effectively increased battery with the cylindrical battery of capacity, and single electric core directly contacts with the good aluminum hull that dispels the heat simultaneously, makes heat dispersion better; Can reduce the injection rate of housing electrolyte inside, allow the interior unnecessary electrolyte of housing contact with moistening with the volume core more fully simultaneously; Also realize and the electric core of more piece circle can be assemblied in the square housing side by side, effectively improved the production efficiency of battery, simultaneously, make the external stability of battery also more convenient and stable; In addition, weld by copper rivet riveted joint or Laser Welding between the negative lug brace in lithium ion power cell cathode joint pin and the battery, can before volume core lug and lug brace weld, finish this operation, better guarantee the compactness that is connected between negative terminal and inner negative electrode lug brace.
The utility model can be widely used in electric bicycle, battery-operated motor cycle, vehicle using motor and automobile etc.
Description of drawings
Fig. 1 is the structural representation (longitudinal section) of the utility model one embodiment.
Fig. 2 is a cross sectional representation embodiment illustrated in fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with embodiment.
Embodiment 1
With reference to accompanying drawing 1,2, present embodiment comprise extrusion modling housing 1, be assemblied in the electric core 2 of housing inner chamber, described housing 1 is for there being fixedly aluminium side's shell of circular cavity, described electric core 2 is formed in parallel side by side by 3 pitch circle column types volume core, single volume core diameter 18.0mm, height 65.0mm, the gap between volume core and the volume core is 0.5mm; Described 3 pitch circle column types volume core in parallel side by side places the circular cavity of described housing 1, and the circular cavity size of described column type volume core size and housing adapts, and each is rolled up the core anode ear and directly is welded on housing 1 base plate by Laser Welding; Housing 1 is provided with loam cake 4, loam cake 4 one sides are provided with negative pole joint pin 5, the interior end of described side's shell is provided with and rolls up the negative pole connecting band 3 that the core negative electrode lug is connected, and by the copper rivet riveted joint, negative pole brace 6 is housed on the negative pole joint pin 5 between negative pole connecting band 3 and the negative pole joint pin 5; Be reserved with positive strap 7 on the loam cake 4; In housing 1, respectively add insulation spacer 8 up and down; Between positive strap 7 and negative pole joint pin 5, explosion-proof valve 9 is housed.
The two ends of the interior symmetry of housing are respectively equipped with and roll up anodal connecting band and the negative pole connecting band that the core lug is connected, and anodal connecting band is connected with the negative pole joint pin with the anodal joint pin that is welded on case top lid respectively with the negative pole connecting band; Rivet by aluminium rivet between the anodal joint pin outside described anodal connecting band and the housing, or weld by super weldering or Laser Welding.Surplus with embodiment 1(but volume core lug needn't be welded in again on housing 1 base plate).
Claims (10)
1. round core side case lithium ion secondary cell, comprise housing, be assemblied in the electric core in the housing, the lug brace, it is characterized in that, described housing is that the fixedly square shell of circular cavity is arranged, described electric core is formed in parallel side by side by 2-20 pitch circle column type volume core, described each pitch circle column type volume core in parallel side by side places the circular cavity of described side's shell, the circular cavity size of described column type volume core size and housing adapts, the anode ear of the column type volume heart connects and is welded on the housing or is welded on the bottom plate, the interior end of described side's shell is provided with and rolls up the negative pole connecting band that core is connected, and the negative pole connecting band links to each other with the negative pole joint pin of being located at case top lid.
2. round core side according to claim 1 case lithium ion secondary cell is characterized in that, the single diameter of described column type volume core is 14.0-40.0mm, highly is 50.0-100.0mm.
3. according to claim 1 or 2 or described round core side case lithium ion secondary cell, it is characterized in that the volume core is 0-1mm with the gap of rolling up between the core.
4. round core side according to claim 3 case lithium ion secondary cell is characterized in that, the gap between described volume core and the volume core is 0.5 mm.
5. round core side according to claim 1 and 2 case lithium ion secondary cell is characterized in that, is provided with explosion-proof valve between positive strap and negative pole joint pin.
6. round core side according to claim 1 and 2 case lithium ion secondary cell is characterized in that, rivets by copper rivet between described negative pole connecting band and the negative pole joint pin, or by electric resistance welding or Laser Welding welding.
7. round core side case lithium ion secondary cell, comprise housing, be assemblied in the electric core in the housing, the lug brace, it is characterized in that, described housing is that the fixedly square shell of circular cavity is arranged, described electric core is formed in parallel side by side by 2-20 pitch circle column type volume core, described each pitch circle column type volume core in parallel side by side places the circular cavity of described side's shell, the circular cavity size of described column type volume core size and housing adapts, the two ends of the interior symmetry of described side's shell are respectively equipped with and roll up anodal connecting band and the negative pole connecting band that core is connected, and anodal connecting band links to each other with the negative pole joint pin with the anodal joint pin of being located at case top lid respectively with the negative pole connecting band.
8. round core side according to claim 7 case lithium ion secondary cell is characterized in that, the single diameter of described column type volume core is 14.0-40.0mm, highly is 50.0-100.0mm; Gap between volume core and the volume core is 0-1mm.
9. round core side according to claim 7 case lithium ion secondary cell is characterized in that, rivets by aluminium rivet between the anodal joint pin outside anodal connecting band and the housing, or welds by super weldering or Laser Welding; Rivet by copper rivet between described negative pole connecting band and the negative pole joint pin, or by electric resistance welding or Laser Welding welding.
10. according to Claim 8 or 9 described round core side case lithium ion secondary cells, it is characterized in that, between anodal joint pin and negative pole joint pin, be provided with explosion-proof valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200448857U CN201936925U (en) | 2011-02-23 | 2011-02-23 | Lithium ion secondary battery with circular cores and square casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200448857U CN201936925U (en) | 2011-02-23 | 2011-02-23 | Lithium ion secondary battery with circular cores and square casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201936925U true CN201936925U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200448857U Expired - Fee Related CN201936925U (en) | 2011-02-23 | 2011-02-23 | Lithium ion secondary battery with circular cores and square casing |
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| CN (1) | CN201936925U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784577A (en) * | 2016-11-14 | 2017-05-31 | 浙江凯恩电池有限公司 | The cylindrical battery of disjunctor |
| CN108039427A (en) * | 2017-12-29 | 2018-05-15 | 上海奥威科技开发有限公司 | One kind assembling easy two side of going out housing apparatus and its assembly method |
| WO2023092338A1 (en) * | 2021-11-24 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, power consuming device, and method and device for preparing battery cell |
-
2011
- 2011-02-23 CN CN2011200448857U patent/CN201936925U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784577A (en) * | 2016-11-14 | 2017-05-31 | 浙江凯恩电池有限公司 | The cylindrical battery of disjunctor |
| CN108039427A (en) * | 2017-12-29 | 2018-05-15 | 上海奥威科技开发有限公司 | One kind assembling easy two side of going out housing apparatus and its assembly method |
| CN108039427B (en) * | 2017-12-29 | 2023-12-22 | 上海奥威科技开发有限公司 | Two-end square shell discharging device easy to assemble and assembling method thereof |
| WO2023092338A1 (en) * | 2021-11-24 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, power consuming device, and method and device for preparing battery cell |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20180223 |