CN204243090U - A kind of high-performance power lithium-ion battery - Google Patents
A kind of high-performance power lithium-ion battery Download PDFInfo
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- CN204243090U CN204243090U CN201420803500.4U CN201420803500U CN204243090U CN 204243090 U CN204243090 U CN 204243090U CN 201420803500 U CN201420803500 U CN 201420803500U CN 204243090 U CN204243090 U CN 204243090U
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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 belongs to field of power lithium ion battery technology, be specifically related to high-performance power lithium-ion battery, comprise top cover, aluminum hull and some polymer soft pack cells, top cover comprises Positive Poles and negative pole pole, polymer soft pack cell draws anode ear and negative electrode lug, and some polymer soft pack cells are also unified into battery core group, and battery core group is placed in aluminum hull chamber, anode ear is electrically connected with Positive Poles, and negative electrode lug is electrically connected with negative pole pole.The utility model adopts polymer soft pack cell to enter aluminum hull; aluminum-shell battery is made to have the high-performance of similar Soft Roll polymer battery; and the packaging bag of polymer soft pack cell has protective effect to battery core; reduce the requirement to aluminum hull mechanical strength and seal welding; to reduce aluminum hull thickness and welding processing cost, improve energy per volume density.Fail safe is high, and stuctures and properties is with the obvious advantage, is beneficial to recovery, and polymer soft pack cell is also unified into battery core group and can also reduces internal resistance, realizes battery High-current output characteristic, can improve cell power density.
Description
Technical field
The utility model belongs to field of power lithium ion battery technology, is specifically related to a kind of high-performance power lithium-ion battery.
Background technology
Energy crisis and ecological deterioration problem are on the rise; Global Oil crisis is particularly outstanding; see according to current world oil depletion rate; Global Oil reserves greatly in 50-100 by approach exhaustion; orthodox car not only accelerates the depletion rate of oil to the dependence of oil, and CO, NO of discharge
xthe living environment of the mankind is seriously polluted Deng pernicious gas.Reduce automobile industry and the effective way that the mankind solve energy crisis, prevent environment from worsening further has been become to the dependence of oil.Wherein use electrokinetic cell to become automobile industry one as power source to develop on a large scale direction.
The electrokinetic cell that power vehicle now uses is generally integrated by multiple monomer lithium ion battery, the integrated difficulty using jumbo monomer lithium ion battery can reduce low capacity lithium ion battery to bring because of enormous amount in power vehicle, greatly can improve the security performance of car load simultaneously.What early stage power type high-capacity unit lithium ion battery adopted is box hat external structure, but heavy weight box hat proportion in whole cell is very large, seriously reduces the mass energy density of single battery.What extensively adopt now is the aluminum hull that density is less, and advantage is that aluminum hull is comparatively light, improves the mass energy density of single battery.
But because the mechanical strength of aluminium is inferior to steel, therefore fail safe reduces relatively, once aluminum hull is damaged, there will be a series of safety problems such as leakage; Simultaneously in order to ensure there being enough intensity, the thickness of aluminum hull relatively can be thicker, causes the lifting of volume energy density limited.In addition, collector and the direct welded structure of collector plate design, and cause technique to realize difficulty, strengthen cost of manufacture; The naked battery core of this inside configuration can not carry out being similar to the tight Optimization Technologies such as polymer soft-package battery fixture baking, realizing contacting closely between positive/negative plate simultaneously, thus causes battery core electrochemistry can obtain maximized performance.
Utility model content
The purpose of this utility model is: for the deficiencies in the prior art, provides a kind of being easy to process the high-performance power lithium-ion battery optimized, improves mass energy density and the volume energy density of power lithium-ion battery.
For achieving the above object, the utility model adopts following technical scheme: a kind of high-performance power lithium-ion battery, comprise top cover, aluminum hull and several polymer soft pack cells, described top cover comprises Positive Poles and negative pole pole, described polymer soft pack cell draws anode ear and negative electrode lug, polymer soft pack cell described in several is also unified into battery core group, and described battery core group is placed in described aluminum hull chamber, described anode ear is electrically connected with described Positive Poles, and described negative electrode lug is electrically connected with described negative pole pole.Packaged polymer soft pack cell is placed to replace the naked battery core of conventional aluminum housing battery inside in described aluminum hull, therefore the requirement to aluminum hull mechanical strength is reduced, make aluminum hull can do thinner, reduce thickness and the quality of aluminum hull, improve mass energy density and the volume energy density of electrokinetic cell, several polymer soft pack cells are also unified into battery core group, improve the integrated level of power lithium-ion battery, reduce the internal resistance of power lithium-ion battery, realize battery High-current output characteristic, improve cell power density.
One as high-performance power lithium-ion battery described in the utility model is improved, comprise and be arranged at positive strap in described aluminum hull chamber and negative straps, be connected by described positive strap between described anode ear with described Positive Poles, be connected by described negative straps between described negative electrode lug with described negative pole pole.Be connected with the direct of electrode connecting piece compared to collector, the connected mode be connected with electrode connecting piece by lug is beneficial to processing, in order to reduce difficulty of processing further, described negative electrode lug is connected on described negative straps between two parties, described anode ear is connected in described positive strap between two parties, and connected mode can be laser welding.
One as high-performance power lithium-ion battery described in the utility model is improved, and the quantity being placed in the polymer soft pack cell in described aluminum hull chamber is 2.Described anode ear and described negative electrode lug are " Z " type structure, the anode ear of 2 described polymer soft pack cells is connected to the both sides up and down of described positive strap, and the negative electrode lug of 2 described polymer soft pack cells is connected to the both sides up and down of described negative straps.Anode ear and the negative electrode lug of " Z " type structure can be close to described positive strap and described negative straps, be easy to be connected with described positive strap and described negative straps respectively, make the connection of lug and electrode connecting piece more firm, and optimize space, reduce the occupancy to aluminum hull cavity space, reduce the volume of aluminum hull, improve the volume energy density of power lithium-ion battery.
One as high-performance power lithium-ion battery described in the utility model is improved, and is provided with the safety in utilization that insulation liner layer improves electrokinetic cell between described battery core group and described aluminum hull.
One as high-performance power lithium-ion battery described in the utility model is improved, and described negative electrode lug surface is coated with nickel dam.
One as high-performance power lithium-ion battery described in the utility model is improved, and described aluminum hull is straight quadrangular structure.Straight quadrangular structure is beneficial to multiple high-performance power lithium-ion battery and integrates, and improves the utilance in space.
One as high-performance power lithium-ion battery described in the utility model is improved, described polymer soft pack cell comprises the naked battery core of Soft Roll and aluminum-plastic packaging bag, described Soft Roll naked battery core hot compression molding is encapsulated in described aluminum-plastic packaging bag, the naked battery core of described Soft Roll is by comprising barrier film, the battery core lamination winding of cathode pole piece and anode pole piece forms, described cathode pole piece comprises negative current collector, described anode pole piece comprises plus plate current-collecting body, described negative current collector is connected with described negative electrode lug, described plus plate current-collecting body is connected with described anode ear, described negative current collector and described plus plate current-collecting body are arranged at the both sides of described battery core lamination coiling direction respectively.
One as high-performance power lithium-ion battery described in the utility model is improved, the order that stacks of described battery core lamination is followed successively by described barrier film, described cathode pole piece, described barrier film, described anode pole piece, described cathode pole piece comprises copper foil and is coated on the electrode active material on described copper foil, described copper foil length direction leaves the blank Copper Foil district of electrode active material described in the uncoated of side as negative current collector, apply the Copper Foil district of described electrode active material as negative electrode active material coating region, described anode pole piece comprises aluminium foil and is coated on the electrode active material on described aluminium foil, described aluminium foil length direction leaves the blank aluminium foil district of electrode active material described in the uncoated of side as plus plate current-collecting body, apply the aluminium foil district of described electrode active material as positive active material coating region, intersection between described plus plate current-collecting body and described positive active material coating region scribbles ceramic coating.
One as high-performance power lithium-ion battery described in the utility model is improved, after described battery core lamination launches, described in the longitudinal direction cathode pole piece all exceed described anode pole piece end to end, described negative electrode active material coating region area can cover described positive active material coating region completely, and the described barrier film between described cathode pole piece and described anode pole piece can cover described negative electrode active material coating region completely.
The beneficial effects of the utility model are:
1, high security.The utility model uses polymer soft pack cell directly to enter aluminum hull, aluminum hull inner chamber does not have electrolyte, therefore the leakage of the battery effectively avoiding extraneous mechanical damage or the corrosion of electrolyte inside to aluminum hull to cause and because of a series of safety problems caused by leakage.Meanwhile, the encapsulation of inner polymer soft pack cell also has the function protecting inner battery core, plays the effect of duplicate protection;
2, high-energy-density.In the utility model, owing to adopting polymer soft pack cell directly to enter aluminum hull, reduce the requirement to aluminum hull mechanical strength, thus the thickness of aluminum hull can suitably reduce, and improves energy density and the specific energy of unit volume;
3, stuctures and properties is made the most of the advantage obviously.Tight Optimization Technologies such as adopting polymer soft pack cell, be convenient to carry out fixture baking, bleed, realizes close contact between the inner positive/negative plate of battery core, is conducive to the inner both positive and negative polarity electrochemical reaction of battery core, promotes battery core chemical property; Polymer soft pack cell lug and electrode connecting piece Joining Technology realize simply, saving production cost simultaneously;
4, be beneficial to recovery, reduce use cost.In the utility model, the parts of core are polymer soft pack cells, and aluminum hull inner chamber does not have electrolyte.So if cause the breakage of aluminum hull due to external factor, as long as interior polymeric thing soft pack cell is not destroyed, this impaired battery can return manufacturing firm and repair rapidly damaged aluminum hull and re-use, and saves risk cost.And the aluminum-shell battery of prior art, once aluminum hull destroys, have potential safety hazard on the one hand, almost can not carry out repairing and reusing simultaneously, can only scrap;
5, reduce internal resistance.Polymer soft pack cell is also unified into battery core and is assembled into aluminum hull, reduces the internal resistance of power lithium-ion battery, realizes battery High-current output characteristic, can improve cell power density.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is decomposing schematic representation of the present utility model.
Fig. 3 is that in the utility model, battery core lamination launches schematic diagram.
Fig. 4 is the polymer soft pack cell schematic diagram in the utility model with " Z " type lug.
Fig. 5 has the battery core group of " Z " type lug and positive strap and negative pole connection diagram in flakes in the utility model.
Fig. 6 is the naked core strueture schematic diagram of Soft Roll in the utility model.
Wherein, 1. top cover, 2. aluminum hull, 3. polymer soft pack cell, 4. Positive Poles, 5. negative pole pole, 6. anode ear, 7. negative electrode lug, 8. battery core group, 9. insulation liner layer, 10. positive strap, 11. negative straps, the naked battery core of 12. Soft Roll, 13. aluminum-plastic packaging bags, 14. barrier films, 15. battery core laminations, 16. plus plate current-collecting bodies, 17. negative current collectors, 18. negative electrode active material coating regions, 19. positive active material coating regions, 20. ceramic coatings.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model and beneficial effect thereof are described in further detail, but embodiment of the present utility model is not limited thereto.
As shown in Fig. 1 to 5, a kind of high-performance power lithium-ion battery, comprise Aluminum Alloy Roof Cover 1, the aluminium alloy aluminum hull 2 of rectangular structure and 2 polymer soft pack cells 3, top cover 1 comprises the Positive Poles 4 of aluminium material and the negative pole pole 5 of copper material, polymer soft pack cell 3 draws the anode ear 6 of aluminium material and the surperficial negative electrode lug 7 being coated with the copper material of nickel dam, 2 polymer soft pack cells 3 are also unified into battery core group 8, and battery core group 8 is placed in aluminum hull 2 chamber, the insulation liner layer 9 of PET material is provided with between battery core group 8 and aluminum hull 2, positive strap 10 and negative straps 11 is provided with in aluminum hull 2 chamber, positive strap 10 is welded with Positive Poles 4, negative straps 11 is connected with negative pole pole 5, anode ear 6 is welded in positive strap 10 between two parties, negative electrode lug 7 is connected on negative straps 11 between two parties, anode ear 6 is electrically connected with Positive Poles 4 by positive strap 10, negative electrode lug 7 is electrically connected with negative pole pole 5 by negative straps 11.
Wherein, polymer soft pack cell 3 comprises the naked battery core 12 of Soft Roll and aluminum-plastic packaging bag 13, aluminum-plastic packaging bag 13 rushes hole packaging by hot pressing respectively by upper and lower two case chips and forms, Soft Roll naked battery core 12 hot compression molding is encapsulated in aluminum-plastic packaging bag 13, the naked battery core 12 of Soft Roll is by comprising barrier film 14, battery core lamination 15 winding of cathode pole piece and anode pole piece forms, cathode pole piece comprises negative current collector 17, anode pole piece comprises plus plate current-collecting body 16, negative current collector 17 is connected with negative electrode lug 7, plus plate current-collecting body 16 is connected with anode ear 6, negative current collector 17 and plus plate current-collecting body 16 are arranged at the both sides of battery core lamination 15 coiling direction respectively.The order that stacks of battery core lamination 15 is followed successively by barrier film 14-cathode pole piece-barrier film 14-anode pole piece, cathode pole piece comprises copper foil and is coated on the electrode active material on copper foil, copper foil leaves the blank Copper Foil district of side uncoated electrode active material as negative current collector 17, the Copper Foil district of coated electrode active material is as negative electrode active material coating region 18, anode pole piece comprises aluminium foil and is coated on the electrode active material on aluminium foil, aluminium foil leaves the blank aluminium foil district of side uncoated electrode active material as plus plate current-collecting body 16, the aluminium foil district of coated electrode active material is as positive active material coating region 19, intersection between plus plate current-collecting body 16 and positive active material coating region 19 scribbles ceramic coating 20.After battery core lamination 15 launches, in the longitudinal direction cathode pole piece all exceed anode pole piece end to end, namely cathode pole piece can cover anode pole piece in the longitudinal direction, negative electrode active material coating region 18 area can cover positive active material coating region 19 completely, and the barrier film 14 between cathode pole piece and anode pole piece can cover negative electrode active material coating region 18 completely.
As preferably, anode ear 6 and negative electrode lug 7 are " Z " type structure.The anode ear 6 of 2 polymer soft pack cells 3 is connected to the both sides up and down of positive strap 10, and the negative electrode lug 7 of 2 polymer soft pack cells 3 is connected to the both sides up and down of negative straps 11.Anode ear 6 and the negative electrode lug 7 of " Z " type structure can be close to positive strap 10 and negative straps 11, are easy to be connected with positive strap 10 and negative straps 11 respectively, make the connection of lug and electrode connecting piece more firm.
In present embodiment; have employed polymer soft pack cell 3 and directly load aluminum hull 2; aluminum-plastic packaging bag 13 pairs of battery cores of polymer soft pack cell 3 have certain protective effect; because this reducing the requirement to aluminum hull 2 mechanical strength; so the thickness of aluminum hull 2 can suitably reduce, to improve the energy density of unit volume.Meanwhile, polymer soft pack cell 3, is convenient to carry out fixture baking, the closely Optimization Technology such as to bleed, and realizes close contact between the inner positive/negative plate of battery core, is conducive to the inner both positive and negative polarity electrochemical reaction of battery core, promotes battery core chemical property; Polymer soft pack cell 3 realizes simply, saving production cost by the Joining Technology of lug and electrode connecting piece; 2 polymer soft pack cells 3 are also unified into the internal resistance that battery core group 8 reduces power lithium-ion battery.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned execution mode and revise.Therefore, the utility model is not limited to above-mentioned embodiment, and any apparent improvement of every those skilled in the art done by basis of the present utility model, replacement or modification all belong to protection range of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. a high-performance power lithium-ion battery, it is characterized in that: comprise top cover, aluminum hull and several polymer soft pack cells, described top cover comprises Positive Poles and negative pole pole, described polymer soft pack cell draws anode ear and negative electrode lug, polymer soft pack cell described in several is also unified into battery core group, and described battery core group is placed in described aluminum hull chamber, described anode ear is electrically connected with described Positive Poles, and described negative electrode lug is electrically connected with described negative pole pole.
2. high-performance power lithium-ion battery according to claim 1, it is characterized in that: also comprise and be arranged at positive strap in described aluminum hull chamber and negative straps, be connected by described positive strap between described anode ear with described Positive Poles, be connected by described negative straps between described negative electrode lug with described negative pole pole.
3. high-performance power lithium-ion battery according to claim 2, is characterized in that: the quantity of described polymer soft pack cell is 2.
4. high-performance power lithium-ion battery according to claim 3, it is characterized in that: described anode ear and described negative electrode lug are " Z " type structure, the anode ear of 2 described polymer soft pack cells is connected to the both sides up and down of described positive strap, and the negative electrode lug of 2 described polymer soft pack cells is connected to the both sides up and down of described negative straps.
5. high-performance power lithium-ion battery according to claim 1, is characterized in that: be provided with insulation liner layer between described battery core group and described aluminum hull.
6. high-performance power lithium-ion battery according to claim 1, is characterized in that: described negative electrode lug surface is coated with nickel dam.
7. high-performance power lithium-ion battery according to claim 1, is characterized in that: described aluminum hull is straight quadrangular structure.
8. high-performance power lithium-ion battery according to claim 1, it is characterized in that: described polymer soft pack cell comprises the naked battery core of Soft Roll and aluminum-plastic packaging bag, described Soft Roll naked battery core hot compression molding is encapsulated in described aluminum-plastic packaging bag, the naked battery core of described Soft Roll is by comprising barrier film, the battery core lamination winding of cathode pole piece and anode pole piece forms, described cathode pole piece comprises negative current collector, described anode pole piece comprises plus plate current-collecting body, described negative current collector is connected with described negative electrode lug, described plus plate current-collecting body is connected with described anode ear, described negative current collector and described plus plate current-collecting body are arranged at the both sides of described battery core lamination coiling direction respectively.
9. high-performance power lithium-ion battery according to claim 8, it is characterized in that: the order that stacks of described battery core lamination is followed successively by described barrier film, described cathode pole piece, described barrier film, described anode pole piece, described cathode pole piece comprises copper foil and is coated on the electrode active material on described copper foil, described copper foil leaves the blank Copper Foil district of electrode active material described in the uncoated of side as negative current collector,-apply the Copper Foil district of described electrode active material as negative electrode active material-coating region, described anode pole piece comprise aluminium foil and-be coated on electrode active material on described aluminium foil, described aluminium foil leaves the blank aluminium foil district of electrode active material described in the uncoated of side as plus plate current-collecting body, apply the aluminium foil district of described electrode active material as positive active material coating region, intersection between described plus plate current-collecting body and described positive active material coating region scribbles ceramic coating.
10. high-performance power lithium-ion battery according to claim 9, it is characterized in that: after described battery core lamination launches, described in the longitudinal direction cathode pole piece all exceed described anode pole piece end to end, described negative electrode active material coating region area can cover described positive active material coating region completely, and the described barrier film between described cathode pole piece and described anode pole piece can cover described negative electrode active material coating region completely.
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| CN201420803500.4U CN204243090U (en) | 2014-12-18 | 2014-12-18 | A kind of high-performance power lithium-ion battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784993A (en) * | 2016-12-29 | 2017-05-31 | 中国电子科技集团公司第十八研究所 | Flexible polymer thin lithium ion battery and preparation method thereof |
| CN107195957A (en) * | 2017-05-23 | 2017-09-22 | 深圳吉阳智能科技有限公司 | The lithium ion battery and its preparation method of both positive and negative polarity homonymy arrangement |
| CN110323487A (en) * | 2019-07-10 | 2019-10-11 | 宁德时代新能源科技股份有限公司 | Lithium ion battery and electric equipment comprising same |
| CN115579590A (en) * | 2022-11-02 | 2023-01-06 | 湖北亿纬动力有限公司 | Battery cell, battery module and manufacturing method of battery cell |
| WO2024103915A1 (en) * | 2022-11-15 | 2024-05-23 | 珠海冠宇电池股份有限公司 | Battery and electronic device |
-
2014
- 2014-12-18 CN CN201420803500.4U patent/CN204243090U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784993A (en) * | 2016-12-29 | 2017-05-31 | 中国电子科技集团公司第十八研究所 | Flexible polymer thin lithium ion battery and preparation method thereof |
| CN107195957A (en) * | 2017-05-23 | 2017-09-22 | 深圳吉阳智能科技有限公司 | The lithium ion battery and its preparation method of both positive and negative polarity homonymy arrangement |
| CN107195957B (en) * | 2017-05-23 | 2024-05-28 | 深圳吉阳智能科技有限公司 | Lithium ion battery with anode and cathode arranged on same side and manufacturing method thereof |
| CN110323487A (en) * | 2019-07-10 | 2019-10-11 | 宁德时代新能源科技股份有限公司 | Lithium ion battery and electric equipment comprising same |
| US11329319B2 (en) | 2019-07-10 | 2022-05-10 | Contemporary Amperex Technology Co., Limited | Lithium-ion battery and electrical apparatus including the same |
| CN115579590A (en) * | 2022-11-02 | 2023-01-06 | 湖北亿纬动力有限公司 | Battery cell, battery module and manufacturing method of battery cell |
| WO2024103915A1 (en) * | 2022-11-15 | 2024-05-23 | 珠海冠宇电池股份有限公司 | Battery and electronic device |
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