CN208272041U - A kind of rectangular lithium ion battery with aluminum shell - Google Patents
A kind of rectangular lithium ion battery with aluminum shell Download PDFInfo
- Publication number
- CN208272041U CN208272041U CN201820802490.0U CN201820802490U CN208272041U CN 208272041 U CN208272041 U CN 208272041U CN 201820802490 U CN201820802490 U CN 201820802490U CN 208272041 U CN208272041 U CN 208272041U
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- battery core
- naked
- naked battery
- lithium ion
- negative electrode
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 30
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 239000011149 active material Substances 0.000 claims abstract description 17
- 239000007774 positive electrode material Substances 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000007773 negative electrode material Substances 0.000 claims abstract description 9
- 239000011888 foil Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000005030 aluminium foil Substances 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 4
- 210000005069 ears Anatomy 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000011267 electrode slurry Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000010926 waste battery Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model embodiment discloses a kind of rectangular lithium ion battery with aluminum shell, including rectangular aluminum hull, further includes at least two naked battery cores being arranged in rectangular aluminum hull, and at least two naked battery core is arranged in parallel；The naked battery core is with winding method combination forming, including positive plate and negative electrode tab and the isolation film being set between the positive plate and the negative electrode tab；Wherein, using anode ending when a bare electric core winding, and positive electrode active materials are coated on the outside of the pole piece that finishes up；It is finished up when another bare electric core winding of parallel connection therewith using cathode, and is coated with negative electrode active material on the outside of the pole piece that finishes up.A kind of rectangular lithium ion battery with aluminum shell provided by the embodiment of the utility model, take full advantage of the active material slatterned between naked battery core and naked battery core in battery core, improve the energy density of battery core, and without extra negative electrode active material at battery core ending, so that the battery core chemical conversion stage does not have excessive lithium ion and is wasted, the first effect of battery core is improved.
Description
Technical field
The utility model embodiment is related to power battery technology field more particularly to a kind of rectangular lithium ion battery with aluminum shell.
Background technique
With universal and to electric car course continuation mileage the promotion of electric car, group efficiency is high, good reliability
Rectangular hard shell battery core is increasingly welcome by market；
Currently, for high capacity rectangular hard shell battery core in order to guarantee manufacturing yield, two are generally used inside battery core
Or the design of how naked battery core parallel connection；
Naked battery core ending is generally finished up using the copper foil with active material of positive electrode, or uses the aluminium foil of non-viable material
Ending；In such a battery core, due to the positive and negative anodes active material coating not matched, Jiu Huilang between naked battery core and naked battery core
The inner space of power-consuming core, and naked battery core is more, and the space of waste is bigger.
Utility model content
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of rectangular aluminum hull lithium
Ion battery, to solve the problems, such as the inner space of prior art waste battery core.
To achieve the above objectives, the present invention provides the following technical solutions:
A kind of rectangular lithium ion battery with aluminum shell, including rectangular aluminum hull further include two be arranged in rectangular aluminum hull or more
A naked battery core, described two or multiple naked battery cores are arranged in parallel；The naked battery core is with winding method combination forming, including positive plate
And negative electrode tab and the isolation film being set between the positive plate and the negative electrode tab；Wherein, a naked battery core is with anode
Pole piece ending, another paired naked battery core are finished up with cathode pole piece.
Further, unilateral using existing at the naked battery core ending of anode ending in the rectangular lithium ion battery with aluminum shell
The empty substrate area for being not coated by positive electrode active materials, and cathode is that bilateral continuously coats the diaphragm of active material.
Further, unilateral using existing at the naked battery core ending of cathode ending in the rectangular lithium ion battery with aluminum shell
The empty substrate area for being not coated by negative electrode material, and the just extremely diaphragm of dual coating active material.
Further, in the rectangular lithium ion battery with aluminum shell, the positive plate include foil, coated on foil just
Pole active material layer and by foil draw multiple positive pole ears, the negative electrode tab include foil, coated on foil just
Pole active material layer and the multiple negative lugs drawn by foil；The naked battery core include anode pole piece, cathode pole piece and
The isolation film being clipped between positive electrode and negative electrode pole piece；The anode of two or more naked battery cores after being wound into the naked battery core
Tab with positive pole ear and negative lug are in parallel with negative lug welds together.
Further, in the rectangular lithium ion battery with aluminum shell, the foil is aluminium foil or copper foil.
Further, in the rectangular lithium ion battery with aluminum shell, there have between the naked battery core matched two-by-two to be mutually right
The positive and negative anodes film surface answered.
Further, in the rectangular lithium ion battery with aluminum shell, the naked battery core matched two-by-two have identical structure and
Size is identical.
Further, in the rectangular lithium ion battery with aluminum shell, the naked battery core matched two-by-two is corresponding active
The side of material coating is single layer, and the side of non-viable material coating is bilayer.
Compared with prior art, the utility model has the following beneficial effects:
1, the active material and space that side slatterns between the naked battery core of parallel connection in battery core are taken full advantage of, battery core is improved
Energy density；
2, without extra negative electrode active material at battery core ending, so that the battery core chemical conversion stage does not have excessive lithium ion quilt
It slatterns, improves the first effect of battery core.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of naked electricity of two pairings of rectangular lithium ion battery with aluminum shell that the utility model embodiment one provides
The unwelded structural schematic diagram of core；
Fig. 2 is the structure for the naked battery core positive electrode and negative electrode pole piece matched two-by-two that the utility model embodiment one provides
Schematic diagram.
Specific embodiment
It is practical below in conjunction with this to enable the purpose of this utility model, feature, advantage more obvious and understandable
Attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that under
The described embodiments are only a part of the embodiments of the utility model in face, and not all embodiment.Based on the utility model
In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, fall within the protection scope of the utility model.
In the description of the present invention, it should be understood that when a component is considered as " connection " another component,
It can be directly to another component or may be simultaneously present the component being centrally located.When a component is considered as
" setting exists " another component, it, which can be, is set up directly on another component or may be simultaneously present the group being centrally located
Part.
In addition, the indicating positions such as term " length " " short " "inner" "outside" or positional relationship for the orientation that is shown based on attached drawing or
Person's positional relationship is merely for convenience of description the utility model, rather than the device or original part of indication or suggestion meaning must have
There is this specific orientation, operated with specific orientation construction, should not be understood as the limitation of the utility model with this.
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Embodiment one
The utility model embodiment provides a kind of rectangular lithium ion battery with aluminum shell, by that will be received in the prior art with negative electrode tab
Two naked battery cores of parallel connection of tail are changed to one with positive plate ending and the naked battery core of parallel connection that another is finished up with negative electrode tab, and
There are corresponding positive electrode and negative electrode material between two naked battery cores, the space between two naked battery cores is also made full use of, from
And achieve the purpose that increase entire single battery core energy density solve the problems, such as the inner space of prior art waste battery core.
The rectangular lithium ion battery with aluminum shell, including rectangular aluminum hull further include at least two be arranged in rectangular aluminum hull
Naked battery core, at least two naked battery core are arranged in parallel；The naked battery core is with winding method combination forming, including positive plate and negative
Pole piece and the isolation film being set between the positive plate and the negative electrode tab；Wherein, a naked battery core is received using anode
Tail, the positive plate at ending is than the cathode length of a film, and another paired naked battery core is finished up using cathode, ending
The negative electrode tab at place is than the positive length of a film.
As shown in Figure 1, naked battery core A and naked battery core B are arranged in parallel in rectangular aluminum hull, the naked battery core A is with winding method
Combination forming including positive plate A22 and negative electrode tab A12 and is set between the positive plate A22 and the negative electrode tab A12
Isolation film A5, the naked battery core B are with winding method combination forming, including positive plate B12 and negative electrode tab B22 and are set to described
Isolation film B5 between positive plate B12 and the negative electrode tab B22；In naked battery core A, A24 is to only have One-sided coatings active material
Foil, A23 and A22 are the foil of dual coating active material；In naked battery core B, B24 is that only single side coats active material
Foil, B23 and B22 are the foil of dual coating active material.
Wherein, the quantity of the naked battery core in lithium battery can be 2 or 2 integral multiple.
In the utility model embodiment, naked battery core A is using the naked battery core of anode ending, and naked battery core B is using cathode
The naked battery core of ending.
Preferably, the positive plate includes foil, draws coated on the positive electrode active material layer on foil and by foil
Multiple positive pole ears, the negative electrode tab includes foil, draws coated on the positive electrode active material layer on foil and by foil
Multiple negative lugs；The positive pole ear and positive pole ear of two or more naked battery cores after being wound into the naked battery core
And negative lug is in parallel with negative lug welds together.
Wherein, the number of plies of tab is determined according to actual needs, and quantity can be 1-100.
Preferably, in the rectangular lithium ion battery with aluminum shell, the corresponding active material of the naked battery core that matches two-by-two
The side of material coating is single layer, and the side of non-viable material coating is bilayer.
As shown in Fig. 2, figure A22 is a film area of the positive plate of naked battery core A, which is continuous coating；A23 is positive
Another film area of pole piece, the painting length of A23 are of same size with face big after bare electric core winding；There is non-film between A22 and A23
Naked substrate area A24, the length of A24 is the sum of the perimeter of naked battery core big face width and naked battery core turning circular arc；
Figure B22 is a film area of the negative electrode tab of naked battery core B, which is continuous coating；Scheming B23 is the another of negative electrode tab
One film area, the painting cloth length of B23 and the big face of naked battery core are of same size, have the naked substrate of non-film to remove B24 between B22 and B23,
The length of B24 is the sum of the big face width of naked battery core and naked battery core turning circular arc perimeter；
The negative electrode tab A12 and isolation film that naked battery core A is continuously coated with as the positive plate where film area A22 and A23 and commonly
A5 is wound, wherein where film area A22 facing towards inside, facing towards outside where A23 and A24；
The positive plate B12 and isolation film that naked battery core B is continuously coated with as the negative electrode tab where film area B22 and B23 and commonly
B5 is wound, wherein where film area B22 facing towards inside, facing towards outside where B23 and B24；
A21, B11 are respectively positive pole ear；Scheming A11, B21 is negative lug.
For two naked battery cores in assembly, the A23 film area of naked battery core A is opposite with the B23 film area of naked battery core B；Naked battery core A's
The naked substrate area B24 of naked substrate area A24 and naked battery core B are towards aluminum hull direction.
Preferably, the side A23 is wrapped up by one layer of isolation film in naked battery core A, and the side A24 is wrapped up by two layers of isolation film；Naked electricity
The side B23 is wrapped up by one layer of isolation film in core B, and the side B24 is wrapped up by two layers of isolation film.
In the utility model embodiment, foil is very thin sheet metal or band.On the market most metals and it
Alloy foil can be made, such as gold, silver, copper, iron, tin, zinc, lead, nickel, aluminium, tungsten, molybdenum, tantalum, niobium, titanium and steel and stainless
Steel, it is preferred that the foil is aluminium foil or copper foil.
Preferably, there is mutual corresponding positive electrode and negative electrode film surface between the naked battery core matched two-by-two.
Preferably, the naked battery core matched two-by-two is winding-structure and size is identical.
Preferably, the width of the naked battery core be 3mm~800mm, be highly 3mm~800mm, with a thickness of 1mm~
100mm。
Preferably, the width of the naked battery core be 20mm~500mm, be highly 2mm~500mm, with a thickness of 3mm~
80mm。
Preferably, the width of the naked battery core be 100mm~300mm, be highly 50mm~110mm, with a thickness of 5mm~
40mm。
In the utility model embodiment, the production method of the positive plate of naked battery core A are as follows:
Step 1, using ternary material as positive electrode active materials, using carbon black as conductive agent, using Kynoar as viscous
Above-mentioned raw materials are uniformly mixed to form anode sizing agent by knot agent using N-Methyl pyrrolidone (NMP) as solvent.
Step 2, the one side that anode sizing agent is continuously coated on to plus plate current-collecting body aluminium foil, and the other side is using interval coating
Mode, wherein the length in the region A22 is determined by actual demand, and the length in the area A23 is the big face width of naked battery core, and the area A24 is (between coating
Gap) length be the sum of the big face width of naked battery core and naked battery core turning circular arc perimeter.
Coated diaphragm is prepared into positive plate by drying, roll-in, cross cutting, slitting by step 3.
In the utility model embodiment, the production method of the negative electrode tab of naked battery core A are as follows:
Step 1, using graphite as negative electrode active material, using butadiene-styrene rubber as binder, using distilled water as solvent, will
Above-mentioned raw materials are uniformly mixed, and form negative electrode slurry.
Step 2, the two sides that negative electrode slurry is coated on to negative current collector copper foil are prepared through drying, roll-in, cross cutting, slitting
At negative electrode tab.
In the utility model embodiment, the production method of naked battery core A are as follows:
Step 1, by the positive plate and negative electrode tab that are prepared according to previous process and isolation film according to: cathode-isolation film-is just
Pole-isolation film mode is by being rolled into naked battery core, positive plate ending, and wherein positive plate A23 and A24 outwardly, and locate respectively
In on two faces of naked battery core.
Step 2, the naked side battery core outmost turns A23 are wrapped up by one layer of isolation film, and the side A24 is wrapped up by two layers of isolation film.
In the utility model embodiment, the production method of the positive plate of naked battery core B are as follows:
Step 1, using ternary material as positive electrode active materials, using carbon black as conductive agent, using Kynoar as viscous
Above-mentioned raw materials are uniformly mixed to form anode sizing agent by knot agent using N-Methyl pyrrolidone (NMP) as solvent.
Step 2, the two sides that anode sizing agent is continuously coated on to plus plate current-collecting body aluminium foil.
Coated positive diaphragm is prepared into positive plate by drying, roll-in, cross cutting, slitting by step 3.
In the utility model embodiment, the production method of the negative electrode tab of naked battery core B is；
Step 1, using graphite as negative electrode active material, using butadiene-styrene rubber as binder, using distilled water as solvent, will
Above-mentioned raw materials are uniformly mixed, and form negative electrode slurry.
Step 2, the one side that negative electrode slurry is coated on to negative current collector copper foil, and the other side is using the side of interval coating
Formula, wherein the length in the region B22 is determined by actual demand, and the length in the region B23 is the big face width of naked the battery core, (coating of the region B24
Gap) length be the sum of the big face width of naked battery core and naked battery core turning circular arc perimeter.
Step 3 after drying coated cathode membrane, is prepared into negative electrode tab through roll-in, cross cutting, slitting.
In the utility model embodiment, the production method of naked battery core B are as follows:
Step 1, by the positive plate and negative electrode tab that are prepared according to previous process and isolation film according to: cathode-isolation film-is just
By being rolled into naked battery core, negative electrode tab finishes up pole-isolation film mode, and wherein negative electrode tab B23 and B24 outwardly and is respectively at
On two faces of naked battery core.
Step 2, the naked side battery core outermost layer B23 are wrapped up by one layer of isolation film, and the side B24 is wrapped up by two layers of isolation film.
In the utility model embodiment, the production production method of battery core are as follows:
Step 1 carries out pairing assembly after the naked battery core A and naked battery core B that complete winding are carried out hot pressing, and naked battery core A is just
Pole tab and the positive pole ear of naked battery core B weld together；The negative lug of naked battery core A and the negative lug of naked battery core B are welded
Together；
Naked battery core and top cover shell that pairing is welded are assembled and are welded together and complete battery core assembly by step 2.
Step 3, battery core complete battery core production by techniques such as fluid injection, chemical conversion, exhaust, sealings.
A kind of rectangular lithium ion battery with aluminum shell provided by the embodiment of the utility model, take full advantage of in battery core naked battery core with
The active material slatterned between naked battery core improves the energy density of battery core, and living without extra cathode at battery core ending
Property material so that the battery core chemical conversion stage does not have excessive lithium ion and is wasted improve the first effect of battery core.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (8)
1. a kind of rectangular lithium ion battery with aluminum shell, including rectangular aluminum hull, which is characterized in that further include being arranged in rectangular aluminum hull
At least two naked battery cores, at least two naked battery core are arranged in parallel；The naked battery core is with winding method combination forming, including just
Pole piece and negative electrode tab and the isolation film being set between the positive plate and the negative electrode tab；Wherein, a naked core coil
Around when using anode ending, and on the outside of the pole piece that finishes up be coated with positive electrode active materials, another bare electric core winding in parallel therewith
Shi Caiyong cathode ending, and negative electrode active material is coated on the outside of the pole piece that finishes up.
2. rectangular lithium ion battery with aluminum shell according to claim 1, which is characterized in that received using the naked battery core of anode ending
There is the unilateral empty substrate area for being not coated by positive electrode active materials at tail, and cathode is the film that bilateral continuously coats active material
Piece.
3. rectangular lithium ion battery with aluminum shell according to claim 1, which is characterized in that received using the naked battery core of cathode ending
There is the unilateral empty substrate area for being not coated by negative electrode material at tail, and the just extremely diaphragm of dual coating active material.
4. rectangular lithium ion battery with aluminum shell according to claim 1, which is characterized in that the positive plate includes foil, applies
The positive electrode active material layer being overlying on foil and the multiple positive pole ears drawn by foil, the negative electrode tab include foil, apply
The positive electrode active material layer being overlying on foil and the multiple negative lugs drawn by foil；Two after being wound into the naked battery core
The positive pole ear of a or multiple naked battery cores with positive pole ear and negative lug are in parallel with negative lug welds together.
5. rectangular lithium ion battery with aluminum shell according to claim 4, which is characterized in that the foil is aluminium foil or copper foil.
6. rectangular lithium ion battery with aluminum shell according to claim 1, which is characterized in that the naked battery core matched two-by-two it
Between have mutual corresponding positive and negative anodes film surface.
7. rectangular lithium ion battery with aluminum shell according to claim 6, which is characterized in that the naked battery core matched two-by-two is equal
For winding-structure and size it is identical.
8. rectangular lithium ion battery with aluminum shell according to claim 7, which is characterized in that the naked battery core phase matched two-by-two
The side of corresponding active material coating is single layer, and the side of non-viable material coating is bilayer.
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| CN113540652A (en) * | 2020-03-30 | 2021-10-22 | 北京小米移动软件有限公司 | Battery and terminal equipment |
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Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |