CN203218345U - Steel-housing battery - Google Patents
Steel-housing battery Download PDFInfo
- Publication number
- CN203218345U CN203218345U CN2013202417373U CN201320241737U CN203218345U CN 203218345 U CN203218345 U CN 203218345U CN 2013202417373 U CN2013202417373 U CN 2013202417373U CN 201320241737 U CN201320241737 U CN 201320241737U CN 203218345 U CN203218345 U CN 203218345U
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- Prior art keywords
- box hat
- battery
- copper foil
- steel
- negative
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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
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a steel-housing battery comprising a cap, a positive lug, a cell and a steel housing. The cell is located in the steel housing, and the cap is covered on the steel shell. The cell is formed by stacking a negative piece, one partition film, a positive piece, and another partition film in a sequence from outside to inside and rolling. When the cell is rolled in the last cycle, only the negative piece extends continuously. The extending part of the negative piece is a copper foil part without being coated by slurry. The copper foil part is rolled continuously, and the length of the copper foil part can wrap the cell more than one cycle. The positive lug is connected with the positive piece. When electrolyte is injected into the steel housing, the cell swells to allow the copper foil part, without being coated by slurry, of the negative piece to cling to the inner wall of the steel housing tightly and to form a tight contact. Thus, the whole steel housing is a connecting part of a negative electrode, and accordingly comprehensive performances, such as discharge rate, of the battery is improved greatly. The steel-housing battery is simple in structure and has good workability, and structure and production method of a cylindrical steel-housing lithium-ion battery is simplified.
Description
Technical field
The utility model relates to field of batteries, relates in particular to a kind of cylindrical steel housing battery without the electric welding negative electrode lug.
Background technology
Lithium ion battery is the secondary cell system with high-energy-density, is used widely in a plurality of fields.Rechargeable lithium ion batteries is most widely used battery in the modern digital products such as present mobile phone, notebook computer.
Mobile phone is very general now, all is to use lithium ion battery basically.Correctly using lithium ion battery is very important to extending battery life.According to the requirement of different electronic products, lithium ion battery can be made flat, rectangular, cylindrical, rectangle and button, and also has by several batteries series connection and/or the battery pack that is connected in parallel and forms.Wherein, be that the battery (cylindrical steel housing battery) of shell is used more general with the nickel plating box hat.Chief reason is: the cylindrical steel housing battery has bigger rigidity, compressive resistance, and anti-distortion, its mechanical strength will obviously be better than aluminum-shell battery, plastic housing battery and flexible-packed battery.Simultaneously, because electric core is limited in rigidity preferably in the box hat, it is little to discharge and recharge change in volume, can effectively improve cycle life.In addition, the box hat battery is very easy to realize full-automatic production, controls quality easily.Therefore, a lot of external companies are that elementary cell is made battery pack with the cylindrical steel housing battery all.The A123 company of the U.S. for example, the electric automobile of manufacturing all is that the cylindrical battery with 18650,26650 types is elementary cell, forms the high high capacity lithium ion battery group of reliability by in parallel and series connection.
The use of lithium ion battery comprises charging and two processes of discharging.
Battery charging process: a power supply charges the battery, and this moment, the electronics e on the positive pole went on the negative pole by external circuit, and positive lithium ion Li+ enters the electrolyte from positive pole, by barrier film, arrives negative pole, combines with electronics on the negative pole.
Battery discharge procedure: it is to add a variable resistor that can change with change in voltage at external circuit in fact that discharge has constant-current discharge and constant-resistance discharge, constant-current discharge, and the essence of constant-resistance discharge is to add a resistance at battery plus-negative plate to pass through by electronics.Hence one can see that, as long as the electronics on the negative pole can not be gone to positive pole from negative pole, battery just can not discharge.Electronics and Li+ are simultaneously acted, the identical but road difference of direction, and during discharge, electronics is gone to positive pole from negative pole through electronic conductor, and lithium ion Li+ enters the electrolyte from negative pole, by barrier film, arrives anodally, combines with electronics on the positive pole.
By above-mentioned operation principle, we can know that a lithium ion battery operate as normal need have positive pole, negative pole, barrier film and electrolyte four parts to finish jointly.The positive and negative electrode of general lithium ion battery all is made of pole piece and lug two parts, and namely positive pole is made of positive plate and anode ear, and negative pole is made of negative plate and negative electrode lug.Pole piece is that lithium ion battery discharges and recharges the chief component in the course of work, and lug is the part that the positive and negative electrode of lithium ion battery is linked to each other with the external world.
The manufacturing process of conventional steel housing battery is: barrier film, positive plate, barrier film, negative plate are folded in order, be rolled into electric core at up-coiler, then negative electrode lug is welded in the box hat bottom by the spot welding pin mark, the anode ear point is welded on the block of battery, and battery is made in pressing through mould.Because negative electrode lug need pass the centre bore of electric core by long capillary and go welding, is very easy to cause defectives such as rosin joint, makes battery failure.According to statistics, 90% rosin joint occurs in the negative electrode lug position.Therefore, improving the negative electrode lug connected mode, strengthen the reliability of battery, is an important problem.
The utility model content
(1) technical problem that will solve
Technical problem to be solved in the utility model provides a kind of simple in structure, has good workability, simplifies present manufacturing and production technology, can effectively avoid the box hat battery of negative electrode lug rosin joint.
(2) technical scheme
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to be, a kind of novel box hat battery structure is provided.This box hat battery comprises block 1, anode ear 3, electric core 4 and box hat 5, and electric core 4 is positioned at box hat 5, and block 1 covers on box hat 5; Stacked and the back of reeling together forms electricity core 4 by order from outside to inside by negative plate 6, barrier film 7, positive plate 8, barrier film 7, after electricity core 4 is wound up into last week, only there is negative plate 6 to continue to prolong, the prolongation of negative plate 6 is the Copper Foil part 9 that does not have coating sizing-agent, Copper Foil part 9 continues to reel, and its length can be wrapped up electric core more than 4 one weeks; Anode ear 3 and positive plate 8 welding.
Wherein, the Copper Foil part that does not have coating sizing-agent 9 of negative plate 6 directly contacts with the inwall of box hat 5.
Wherein, the assembling of described electric core 4 ratio is 95%, namely under same height
Wherein, the length of the Copper Foil part 9 that does not have coating sizing-agent of negative plate 6 is parcel 4 liang of weeks of electric core.
Wherein, between block 1 and the box hat 5 the sealed insulation cushion rubber is arranged.
Wherein, electric core 4 is cylinder, and box hat 5 is cylindrical shape.
Wherein, be spot welding between anode ear 3 and the positive plate 8.
(3) beneficial effect
Adopt the technical solution of the utility model, inject electrolyte in the box hat after, electric core will expand, and makes the Copper Foil part that does not have coating sizing-agent of negative plate tightly be attached to the inwall of box hat, forms with box hat to contact closely.At this moment, whole box hat all is the connecting portion of negative pole, can improve the combination property of battery greatly, and for example discharge-rate can increase substantially etc.The beneficial effects of the utility model are as follows: the first, and the manufacture process of having removed negative electrode lug from helps to simplify battery process; The second, avoided the problem of negative pole rosin joint effectively, improved the reliability of lithium ion battery; The 3rd, do not change traditional lithium ion battery manufacturing process and equipment, can reduce cost; The 4th, can improve the combination property of lithium ion battery effectively by the expansion of negative pole contact area.For example discharge-rate can be brought up to 50C from 30C, and the temperature rise of 20C when discharge battery is reduced to 25 ℃ from 40 ℃, has improved the useful life of battery etc.
Description of drawings
Fig. 1 is the mid section figure of box hat battery of the present utility model;
Fig. 2 is the schematic diagram of box hat battery battery core of the present utility model when not reeling;
Fig. 3 is the schematic diagram after box hat battery battery core of the present utility model is reeled.
Among the figure, 1: block; 2: slot rolling; 3: anode ear; 4: electric core; 5: box hat; 6: negative plate; 7: barrier film; 8: positive plate; 9: the Copper Foil part.
Embodiment
Below in conjunction with drawings and Examples box hat battery of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
In description of the present utility model, need to prove, term " on ", close the orientation of indications such as D score, " interior ", " outward " or position is based on orientation shown in the drawings or position relation, only be the utility model and simplification description for convenience of description, rather than indication or the hint device of indication or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.
As shown in Figure 1, box hat battery of the present utility model comprises block 1, anode ear 3, electric core 4 and box hat 5, and electric core 4 is positioned at box hat 5, and block 1 covers on box hat 5, around the block 1 the sealed insulation cushion rubber is arranged, and can guarantee and box hat 5 insulation.Lug is exactly the metallic conductor that from electric core 4 positive and negative electrode is extracted, and lug is connected with electric core 4, is a kind of annexation of inside battery.The utility model has only anode ear 3, and its material is aluminium (Al).Anode ear 3 welds with block 1 and positive plate 8 respectively, is preferably spot welding.
Shown in Fig. 2,3, stacked and the back of reeling together forms electricity core 4 by order from outside to inside by negative plate 6, barrier film 7, positive plate 8, barrier film 7, after electricity core 4 is wound up into last week, only there is negative plate 6 to continue to prolong, the prolongation of negative plate 6 is the Copper Foil part 9 that does not have coating sizing-agent, Copper Foil part 9 continues to reel, and its length can be wrapped up electric core more than 4 one weeks.
In the utility model, aluminium foil is anodal, and Copper Foil is negative pole, and carrying out after the coating sizing-agent to them respectively is exactly positive plate 8 and negative plate 6.
During coating pole piece metal forming (aluminium foil or Copper Foil), metal forming is emitted by unwinding device, feeds coating machine.The head and the tail of pole piece are sent into tension adjusting device and automatic deviation rectifying device by pulling device after splicer connects into continuous band, enter apparatus for coating after adjusting film path tension force and film path position.Slurry is coated with metal forming by predetermined coating weight and space length segmentation in apparatus for coating.When double spread, be coated with from the positive coating of motion tracking and space length.Wet pole piece after the coating is sent into dry road and is carried out drying, and baking temperature is set according to coating speed and coating thickness.
Dried pole piece carries out rolling behind tension adjustment and automatic deviation correction, process for next step operation.
Barrier film 7, positive plate 8, barrier film 7, negative plate 6 are placed in order from the bottom to top, that is, orlop is barrier film 7, places positive plate 8 above the barrier film 7, places one deck barrier film 7 above the positive plate 8 again, and the superiors are negative plate 6.After barrier film 7, positive plate 8, barrier film 7, negative plate 6 put well successively, to the homogeneous end, the positive plate 8 in that end of alignment is welded together with anode ear 3.The welding requirements of anode ear 3 is: the aluminum strip edge is concordant with the pole piece edge.After welding was good, barrier film 7, positive plate 8, barrier film 7, negative plate were one for 6 four layers, and barrier film 7 is at innermost layer, negative plate 6 is at outermost layer, reel around anode ear 3 together, the diameter behind the coiling is near the inside diameter of box hat 5, and this has just finished the coiling assembling of electric core 4.
Preferred embodiment be that the assembling ratio of electric core will reach about 95%.
Assembling is than being: the ratio of electric core 4 volumes and box hat 5 internal volumes under the same height.
Assemble greatlyyer than too, assembling is inconvenient, and barrier film is squeezed, and ionic conductivity reduces, and internal resistance increases; Assembling is than too little, and it is big that the die opening of pole plate becomes, and internal resistance increases, and is unfavorable for heavy-current discharge, and assembling discharges and recharges convergent-divergent and falls material, lifetime easily than too little.
The requirement of barrier film 7: have electronic isolation, guarantee the mechanical isolation of positive and negative electrode; Certain aperture and porosity are arranged, guarantee low resistance and high ionic conductivity, lithium ion is had good permeability; Because electrolytical solvent is the organic compound of strong polarity, barrier film must corrode by electrolyte resistance, and enough chemistry and electrochemical stability are arranged; Good and have enough imbibition moisture-retaining capacity to the wettability of electrolyte solution; Have enough mechanical properties, comprise puncture intensity, hot strength etc., but thickness is as far as possible little; Spatial stability and planarization are good; Thermal stability and to automatically shut down protective value good; Length is greater than the length of positive plate 8, to guarantee that positive plate 8 can not contact with negative plate 6.
End at negative plate 6 has one section Copper Foil part 9 that does not have coating sizing-agent, after electric core 4 is reeled and finished, does not have the Copper Foil part 9 of coating sizing-agent to continue to reel on the negative plate 6, and making electric core 4 outsides is complete Copper Foil zone, and namely electric core 4 integral body are covered by Copper Foil.Inject electrolyte in box hat 5 after, electric core 4 will expand, and making does not have the Copper Foil of coating sizing-agent part 9 tightly to be attached to the inwall of box hat 5 on the negative plate 6, does not have the Copper Foil part 9 of coating sizing-agent to contact closely with box hat 5 formation.Like this, whole box hat 5 just becomes negative pole, thereby has reduced this processing step of welding of negative electrode lug, has therefore effectively avoided the rosin joint of negative electrode lug, the not high defectives of weld strength.
Preferred embodiment be, do not have the length of the Copper Foil part 9 of coating sizing-agent will guarantee to wrap up electric core more than 4 one weeks on the negative plate 6, do not have the Copper Foil of coating sizing-agent part 9 fully to contact with box hat 5 on the negative plate 6 in order to can make.
Preferred, there is not the Copper Foil part 9 of coating sizing-agent can wrap up 4 liang of weeks of electric core on the negative plate 6.
State when Fig. 3 reels approaching finishing for electric core 4.
Electricity core 4 is cylinder, box hat 5 is the cylindrical shape of an end opening, after electric core 4 put into box hat 5, openend at box hat 5 carries out the slot rolling processing, forms slot rolling 2, and block 1 places the inside of box hat 5, between the edge of slot rolling 2 and box hat 5 openings, and be positioned at the top of anode ear 3, and between the box hat 5 the sealed insulation cushion rubber arranged, anode ear 3 and block 1 are welded.Lithium ion battery is dried, inject electrolyte afterwards, operation such as encapsulate, shelve at last, make lithium ion battery.
At this moment, because the injection of electrolyte makes electric core 4 expand, do not have the Copper Foil of coating sizing-agent part 9 tightly to fit together with the box hat inwall on the negative plate 6 thereby make, form closely contact, make whole box hat 5 become complete negative pole.
So far then finish whole technical process of the present utility model, namely finished the assembling process of battery, made the finished product battery.
At last, with special-purpose battery charging and discharging equipment the finished product battery is carried out charge-discharge test, each battery is all detected, filter out qualified finished product battery.
The technical solution of the utility model goes for batteries such as lithium ion battery, ferric phosphate lithium cell, ternary material battery, cobalt acid lithium battery, particularly is fit to multiplying power type battery.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection range of the present utility model.
Claims (7)
1. a box hat battery comprises block (1), anode ear (3), electric core (4) and box hat (5), and electric core (4) is positioned at box hat (5), and block (1) covers on box hat (5); It is characterized in that, stacked and the back of reeling together forms electricity core (4) by order from outside to inside by negative plate (6), barrier film (7), positive plate (8), barrier film (7), after electricity core (4) is wound up into last week, only there is negative plate (6) to continue to prolong, the prolongation of negative plate (6) is the Copper Foil part (9) that does not have coating sizing-agent, Copper Foil part (9) continues to reel, and its length can be wrapped up electric core more than (4) one weeks; Anode ear (3) and positive plate (8) welding, anode ear (3) and block (1) welding.
2. box hat battery according to claim 1 is characterized in that, the Copper Foil part (9) that does not have coating sizing-agent of negative plate (6) directly contacts with the inwall of box hat (5).
3. box hat battery according to claim 1 is characterized in that, the assembling ratio of described electric core (4) is 95%, namely under same height
4. box hat battery according to claim 1 is characterized in that, the length of the Copper Foil part (9) that does not have coating sizing-agent of negative plate (6) is electric (4) two weeks of core of parcel.
5. box hat battery according to claim 1 is characterized in that, between block (1) and the box hat (5) the sealed insulation cushion rubber is arranged.
6. according to each described box hat battery of claim 1-5, it is characterized in that electric core (4) is cylinder, box hat (5) is cylindrical shape.
7. according to each described box hat battery of claim 1-5, it is characterized in that, be spot welding between anode ear (3) and the positive plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202417373U CN203218345U (en) | 2013-05-07 | 2013-05-07 | Steel-housing battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202417373U CN203218345U (en) | 2013-05-07 | 2013-05-07 | Steel-housing battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203218345U true CN203218345U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202417373U Expired - Lifetime CN203218345U (en) | 2013-05-07 | 2013-05-07 | Steel-housing battery |
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| Country | Link |
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| CN (1) | CN203218345U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461824A (en) * | 2017-12-29 | 2018-08-28 | 惠州市纬世新能源有限公司 | A kind of lithium ion battery structure and matrix over cladding process |
| CN111916660A (en) * | 2019-05-07 | 2020-11-10 | 德莎欧洲股份公司 | Lithium ion battery pole group |
| CN115117466A (en) * | 2022-06-17 | 2022-09-27 | 重庆宏辰科扬能源有限责任公司 | Production process of cylindrical high-voltage nickel-hydrogen battery |
-
2013
- 2013-05-07 CN CN2013202417373U patent/CN203218345U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461824A (en) * | 2017-12-29 | 2018-08-28 | 惠州市纬世新能源有限公司 | A kind of lithium ion battery structure and matrix over cladding process |
| CN111916660A (en) * | 2019-05-07 | 2020-11-10 | 德莎欧洲股份公司 | Lithium ion battery pole group |
| WO2020225393A1 (en) * | 2019-05-07 | 2020-11-12 | Tesa Se | A lithium ion battery electrode assembly |
| CN111916660B (en) * | 2019-05-07 | 2024-02-23 | 德莎欧洲股份公司 | Lithium ion battery pole group |
| CN115117466A (en) * | 2022-06-17 | 2022-09-27 | 重庆宏辰科扬能源有限责任公司 | Production process of cylindrical high-voltage nickel-hydrogen battery |
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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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171205 Address after: 065500 Guan Industrial Park, Hebei, Langfang Patentee after: GU'AN FENGXING TECHNOLOGY CO.,LTD. Address before: 100011 Beijing Dongcheng District Andingmen Street Royal International A No. 136 room 507 Patentee before: BEIJING DINGNENG KAIYUAN BATTERY TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211210 Address after: 036002 shop 18, intelligent Jindi South District, zhangliao North Road, Shuocheng District, Shuozhou City, Shanxi Province Patentee after: Shanxi Xingsheng New Energy Technology Co.,Ltd. Address before: 065500 South District of Gu'an County Industrial Park, Langfang City, Hebei Province Patentee before: GU'AN FENGXING TECHNOLOGY CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220530 Address after: 036002 No. 3 branch of Hongqi ranch, Shuozhou Economic Development Zone, Shuozhou City, Shanxi Province Patentee after: Shanxi Dingneng Qiyuan New Energy Technology Co.,Ltd. Address before: 036002 shop 18, intelligent Jindi South District, zhangliao North Road, Shuocheng District, Shuozhou City, Shanxi Province Patentee before: Shanxi Xingsheng New Energy Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |