CN203850391U - Cell of bendable laminated lithium ion battery - Google Patents
Cell of bendable laminated lithium ion battery Download PDFInfo
- Publication number
- CN203850391U CN203850391U CN201420207361.9U CN201420207361U CN203850391U CN 203850391 U CN203850391 U CN 203850391U CN 201420207361 U CN201420207361 U CN 201420207361U CN 203850391 U CN203850391 U CN 203850391U
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- Prior art keywords
- negative
- plate
- coating area
- positive
- blank foil
- Prior art date
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- Expired - Lifetime
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical class [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000011888 foil Substances 0.000 claims abstract description 93
- 239000011248 coating agent Substances 0.000 claims abstract description 86
- 238000000576 coating method Methods 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims description 59
- 229910001416 lithium ion Inorganic materials 0.000 claims description 34
- 230000004888 barrier function Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 2
- 239000010405 anode material Substances 0.000 abstract 5
- 239000010406 cathode material Substances 0.000 abstract 5
- 238000005452 bending Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 10
- 239000011149 active material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000006258 conductive agent Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001280173 Crassula muscosa Species 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000006664 bond formation reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
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- Secondary Cells (AREA)
Abstract
The utility model discloses a cell of a bendable laminated lithium ion battery. The cell comprises a negative pole piece, a diaphragm and a positive pole piece, wherein the positive pole piece is provided with an anode material coating area and an anode blank foil area which are arranged at intervals, and the anode material coating area is coated with an anode material; the negative pole piece is provided with a cathode material coating area and a cathode blank foil area which are arranged at intervals, and the cathode material coating area is coated with a cathode material; the quantity of the anode material coating area and the anode blank foil area on the positive pole piece is the same as that of the cathode material coating area and the cathode blank foil area on the negative pole piece, and the position of the anode material coating area and the anode blank foil area on the positive pole piece corresponds to that of the cathode material coating area and the cathode blank foil area on the negative pole piece; the negative pole piece, the diaphragm and the positive pole piece are sequentially laminated along the direction vertical to the surface to form the cell. While the cell is bendable within a range of a given angle, the capacity of the cell can be enabled to be normally played and safely used in the application process.
Description
Technical field
The utility model relates to technical field of lithium ion, is specifically related to a kind of battery core of flexible stack type lithium ion battery.
Background technology
Electronics and information industry is flourish in recent years, small-sized discrete portable power source demand rapid development, power supply has also been proposed to more harsh requirement with battery, it require battery possess that volume is little, energy density is high, lightweight, have extended cycle life, safe and advantages of environment protection.On the other hand, different electronic equipments also has different requirements to the shape design of battery, as equipment such as watch chain, children/old man navigator and position indicators, the battery of this type equipment had both required battery can have certain flexural property, ensured again the normal performance of battery capacity and guaranteed the use safety of battery.
Laminated battery plate is compared with coiled battery, the advantage such as laminated batteries has battery size flexible design, the internal resistance of cell is little, high-rate discharge ability good, capacity density is high, energy density is high and the scope of application is wide.Adopt direct punching method to make but existing pole piece of laminated battery is general, positive/negative plate two sides is all the full state of full coat, then at the reserved collector lug in the top of pole piece, the lithium ion laminated battery that these class methods make can not carry out according to the instructions for use of equipment the bending of certain angle, if bending by force, can there is use safety problem.
Utility model content
The technical problems to be solved in the utility model is for the unyielding deficiency of existing stack type lithium ion battery, a kind of battery core of flexible stack type lithium ion battery is provided, adopt the stack type lithium ion battery that the battery core of this flexible stack type lithium ion battery makes according to a conventional method can realize the bending of certain angle, and can guarantee in use normal performance and the use safety of capacity of stack type lithium ion battery.
The battery core of flexible stack type lithium ion battery described in the utility model, comprises negative plate, barrier film and positive plate, wherein:
Described positive plate is provided with positive electrode coating area and anodal blank foil district, and described positive electrode coating area is coated with positive electrode, and described positive electrode coating area and anodal blank foil interval are every setting;
Described negative plate is provided with negative material coating area and the blank foil of negative pole district, and described negative material coating area is coated with negative material, and the blank foil of described negative material coating area and negative pole interval is every setting;
The number of the number of the positive electrode coating area on described positive plate and the negative material coating area on negative plate is identical and position is corresponding, and the number in the number in the blank foil of the positive pole district on positive plate and the negative pole blank foil district on negative plate is identical and position is corresponding; On described positive plate, on the number in the number of positive electrode coating area and anodal blank foil district and negative plate, the number in the blank foil of the number of negative material coating area and negative pole district is integer;
Described negative plate, barrier film and positive plate is along perpendicular to its surperficial direction successively stacked battery core that connects and composes flexible stack type lithium ion battery.
The utility model arranges positive electrode coating area and anodal blank foil district by interval on positive plate, on negative plate, interval arranges negative material coating area and the blank foil of negative pole district, adopt and be coated with coated positive pole material in positive electrode coating area, and be not coated with coated positive pole material in the blank foil of positive pole district, be combined in negative material coating area and apply negative material, and do not apply the structural design of negative material in the blank foil of negative pole district, due to just, coating area on negative plate and blank foil district are corresponding one by one respectively, can utilize and not apply the blank foil district of positive pole of active material and the blank foil of negative pole district as folding basic point, thereby make the battery core can bending certain angle, and then realize the flexible object of battery core, on the other hand, folding battery core realize bending in, due to the blank foil of positive pole blank foil district and negative pole, district does not apply active material, this just provides positive electrode on positive plate and relative removable space of negative material on negative plate, can not make positive electrode shift out in the regional extent of the negative material corresponding with it because of folding, effectively guarantee use safety problem when battery is folding, again on the one hand, design coating area on battery positive and negative electrode and blank foil interval every ratio according to the required battery capacity of equipment, can guarantee the normal performance of the battery capacity that designs gained battery core and the range of application of battery core.
In technique scheme, on described positive plate and negative plate, should be respectively arranged with positive pole ear linkage section and negative lug linkage section, normally, on described positive plate, be provided with positive pole ear linkage section in a side of its length direction; On described negative plate, be provided with negative lug linkage section in a side of its length direction.Generally, the unification of positive pole ear linkage section is arranged on the same side, be connected to facilitate with total lug of battery, negative lug linkage section that theory is set is identical.
In the application's technical scheme, the number in the positive electrode coating area on said positive plate and anodal blank foil district all refers to the number on one of them surface on positive plate (as upper surface or lower surface), same positive electrode coating area and anodal blank foil district that also has same number on opposite face on surface described in this, position and the number in the positive electrode coating area on described two faces and anodal blank foil district are corresponding respectively.Negative plate too.
In technique scheme, can just design according to the size of plus plate current-collecting body and negative current collector and by the required battery capacity of the equipment of battery, coating area on negative pole and blank foil interval are every ratio, applicant is for a long time, on a large amount of experiment basis, think: when the length ratio in positive electrode coating area on positive plate and anodal blank foil district is 1:0.03～0.3, on negative plate, the length ratio in the blank foil of negative material coating area and negative pole district is 1:0.02～0.2 o'clock, described battery core is in the angle of bend of≤120 ° of realizations, can further ensure the normal performance of battery core electric weight and use safety.
Applicant finds under study for action, and when positive plate is of a size of: length is 100～300mm, width while being 10～70mm, the number in the blank foil of the positive pole district of one of them upper design in surface of positive plate is for being more than or equal to 1 and to be less than or equal to 4 be preferred version; On further preferred positive plate, the length of anodal blank foil district on positive plate length direction is 3～6mm, the width that width is positive plate.
According to the size of above-mentioned positive plate, comparatively suitable negative plate is of a size of: length is compared with the large 2～4mm of positive plate, and width is compared with the large 3～5mm of positive plate.The object of mating completely in order to reach positive and negative electrode, on negative plate, the length in blank foil district is preferably less than the length in blank foil district on positive plate, therefore, further on preferred negative pole piece, the length in the blank foil of negative pole district is 2～4mm, the width that width is negative plate.
In the application's technical scheme, the length of said positive electrode coating area refers to the distance of positive electrode coating area on positive plate length direction, and its width is identical with the width of positive plate; The length in the blank foil of said positive pole district refers to the distance of anodal blank foil district on positive plate length direction, and its width is identical with the width of positive plate; The length of said negative material coating area refers to the distance of negative material coating area on negative plate length direction, and its width is identical with the width of negative plate; The length in the blank foil of said negative pole district refers to the distance of the blank foil of negative pole district on negative plate length direction, and its width is identical with the width of negative plate.
Compared with prior art, the utility model adopts special pole piece design to make battery core can carry out the bending of certain angle, these angle of bend≤120 °; In realizing battery bending, can guarantee in use normal performance and the use safety of capacity of stack type lithium ion battery.This battery core can flexible Application on the electronic equipment of needs bending, thereby overcome square and cylindrical battery and can not change the defect of angle.
Brief description of the drawings
Fig. 1 is the front view of a kind of execution mode of battery core of flexible stack type lithium ion battery described in the utility model;
Fig. 2 is the vertical view of positive plate in Fig. 1 execution mode;
Fig. 3 is the vertical view of negative plate in Fig. 1 execution mode;
Fig. 4 is the vertical view of the battery core that makes of the utility model embodiment 1;
Fig. 5 is flexible stack type lithium ion battery that battery core that the utility model embodiment 1 makes is further the made effect schematic diagram while carrying out bending.
Number in the figure is:
The battery core of 1 flexible stack type lithium ion battery; 11 positive plates; 111 positive electrode coating areas; 112 anodal blank foil districts; 113 positive pole ear linkage sections; 12 negative plates; 121 negative material coating areas; The blank foil of 122 negative poles district; 123 negative lug linkage sections; 13 barrier films; 2 flexible stack type lithium ion batteries.
Embodiment
Fig. 1 is the front view of 1 one kinds of execution modes of battery core of flexible stack type lithium ion battery described in the utility model.As shown in Figure 1, the battery core 1 of flexible stack type lithium ion battery described in the utility model comprises negative plate 12, barrier film 13 and positive plate 11, on upper and lower two surfaces of described positive plate 11, be equipped with positive electrode coating area 111 and anodal blank foil district 112, described positive electrode coating area 111 is coated with positive electrode, described positive electrode coating area 111 and 112 intervals, anodal blank foil district arrange, and positive electrode coating area 111 is 1:0.03～0.3 with the length ratio in anodal blank foil district 112; On each positive plate 11, be provided with positive pole ear linkage section 113; Upper and lower two surfaces of described negative plate 12 are provided with negative material coating area 121 and the blank foil of negative pole district 122, described negative material coating area 121 is coated with negative material, 122 intervals, the blank foil of described negative material coating area 121 and negative pole district arrange, and negative material coating area 121 is 1:0.02～0.2 with the length ratio in the blank foil of negative pole district 122, on each negative plate 12, is provided with negative lug linkage section 123; The number of the number of the positive electrode coating area 111 on described positive plate 11 and the negative material coating area 121 on negative plate 12 is identical and position is corresponding, and the number in the number in the blank foil of the positive pole district 112 on positive plate 11 and the negative pole blank foil district 122 on negative plate 12 is identical and position is corresponding; On described positive plate 11, on the number in the number of positive electrode coating area 111 and anodal blank foil district 112 and negative plate 12, the number in the blank foil of the number of negative material coating area 121 and negative pole district 122 is integer; Described negative plate 12, barrier film 13 and positive plate 11 is along perpendicular to its surperficial direction successively battery core 1 of the flexible stack type lithium ion battery of stacked bonding formation, and the vertical view of gained battery core 1 as shown in Figure 4.In Fig. 1 illustrated embodiment, described positive plate 11 is of a size of: length is 100～300mm, width is 10～70mm, on the upper surface of this positive plate 11, be provided with the blank foil of positive pole district 112,111 and 4 of 5 positive electrode coating areas, wherein the length in anodal blank foil district 112 is that 3～6mm is (corresponding, on the lower surface of this positive plate 11, be equally also provided with positive electrode coating area 111 and the anodal blank foil district 112 of same number, two lip-deep positive electrode coating areas 111 and anodal blank foil district 112 have corresponding length and width, and position is corresponding), as shown in Figure 2, described negative plate 12 is of a size of: length is compared with the length 2～4mm of positive plate 11, width is compared with the wide 3～5mm of positive plate 11, on it, be provided with the blank foil of negative pole district, 121 and 4 of 5 negative material coating areas 122, wherein the length in the blank foil of negative pole district 122 is that 2～4mm is (corresponding, on the lower surface of this negative plate 12, be equally also provided with negative material coating area 121 and the blank foil of the negative pole district 122 of same number, the blank foil of two lip-deep negative material coating areas 121 and negative pole district 122 has corresponding length and width, and position is corresponding), as shown in Figure 3, on 111 regions, positive electrode coating area on described positive plate 11, be coated with positive electrode, on 121 regions, negative material coating area on negative plate 12, be coated with negative material, positive electrode coating area 111 on described positive plate 11 is corresponding one by one with the negative material coating area 121 on pole piece, meanwhile, the blank foil of the positive pole on positive plate 11 district 112 is corresponding one by one with the blank foil of the negative pole district 122 on pole piece.
The battery core of above-mentioned flexible stack type lithium ion battery can adopt following method to make, and specifically comprises the following steps:
1) provide plus plate current-collecting body and negative current collector;
2) according to the size of plus plate current-collecting body and negative current collector, design the number of positive electrode coating area on positive plate to be prepared and the number in anodal blank foil district, and the number in the number of negative material coating area and the blank foil of negative pole district on negative plate; Control will prepare the number of negative material coating area on the number of positive electrode coating area on positive plate and the number in anodal blank foil district and negative plate and the number in the blank foil of negative pole district is integer, make the number of the positive electrode coating area on positive plate corresponding with the number position identical and two regions of the negative material coating area on negative plate simultaneously, and make the number in the blank foil of the positive pole district on positive plate corresponding with the number position identical and two regions in the blank foil of the negative pole district on negative plate;
3) provide positive electrode and negative material, the positive electrode coating area by the size designing on plus plate current-collecting body is coated with coated positive pole material, reserves positive pole ear linkage section; Negative material coating area by the size designing on negative current collector applies negative material, reserves negative lug linkage section; Obtain respectively positive plate and negative plate;
4) press the order stacked connection successively of negative plate, barrier film and positive plate, finish up with negative plate, and on the negative plate of the superiors and undermost negative plate stacked barrier film respectively, each positive pole ear linkage section is welded together, each negative lug linkage section is welded together, obtain the battery core of flexible stack type lithium ion battery.
In above-mentioned manufacture method, on positive plate, the number in the number of positive electrode coating area and anodal blank foil district refers to the number of upper positive electrode coating area, one of them surface of positive plate (upper surface or lower surface) and the number in anodal blank foil district, same positive electrode coating area and anodal blank foil district that also has same number on opposite face on surface described in this, position and the number in the positive electrode coating area on described two faces and anodal blank foil district are corresponding respectively.Negative plate too.
The step 1 of above-mentioned manufacture method) in, plus plate current-collecting body adopts aluminium foil conventionally, and negative current collector adopts Copper Foil material conventionally.
The step 2 of above-mentioned manufacture method) in, can and design the space ratio (coating area on positive and negative electrode and the number in blank foil district are set) in coating area on positive and negative electrode and blank foil district by the required battery capacity of the equipment of battery according to the size of plus plate current-collecting body and negative current collector.Applicant finds, when the length ratio in positive electrode coating area on positive plate and anodal blank foil district is 1:0.03～0.3, on negative plate, the length ratio in the blank foil of negative material coating area and negative pole district is 1:0.02～0.2 o'clock, described battery core, in the angle of bend of≤120 ° of realizations, can further ensure the normal performance of battery core electric weight and use safety.Applicant also finds under study for action, and when positive plate is of a size of: length is 100～300mm, width while being 10～70mm, the number in the blank foil of the positive pole district designing on positive plate is for being more than or equal to 1 and to be less than or equal to 4 be preferred version; On further preferred positive plate, the length of anodal blank foil district on positive plate length direction is 3～6mm, the width that width is positive plate.In the time that positive plate is above-mentioned size, comparatively suitable negative plate is of a size of: length is compared with the large 2～4mm of positive plate, and width is compared with the large 3～5mm of positive plate.The object of mating completely in order to reach positive and negative electrode, on negative plate, the length in blank foil district is preferably less than the length in blank foil district on positive plate, therefore, further on preferred negative pole piece, the length in the blank foil of negative pole district is 2～4mm, the width that width is negative plate.
The step 3 of above-mentioned manufacture method) in, composition and the ratio of positive electrode (being anode sizing agent) and negative material (being cathode size) are all same as the prior art, particularly, positive electrode and negative material are all mainly made up of binding agent, conductive agent and active material, wherein, preferably by binding agent: the proportioning of conductive agent: active material=1.5～3.0wt%:1.5～3.0wt%:94～97wt% is pulled an oar and is mixed to get positive electrode; Preferably by binding agent: the proportioning of conductive agent: graphite=1.5～3.0wt%:1.0～2.5wt%:94.5～97.5wt% is pulled an oar and is mixed to get negative material.In the application, the binding agent in positive electrode is preferably PVDF, and the binding agent in negative material is preferably CMC; The conductive agent of positive electrode and negative material is SP; Active material in positive electrode is preferably any one in ternary material, cobalt acid lithium material, LiFePO 4 material and lithium manganate material, and the active material in negative material is preferably graphite; Solvent in positive electrode is preferably NMP, and the solvent in negative material is preferably deionized water.In this step, the painting method of positive electrode and negative material is same as the prior art.
The step 4 of above-mentioned manufacture method) in, when step 3) in the positive plate that makes and negative plate size when larger, positive plate and the negative plate that they need to be struck out respectively to suitable dimension carry out lamination again, normally large-sized positive plate being struck out to length is that 100～300mm is (convenient for explaining, represent this length with p below), width is that 10～70mm is (convenient for explaining, represent this length with q below) suitable dimension, large-sized negative plate is struck out to length for (p+ (2～4)) mm, width is the suitable dimension of (q+ (3～5)) mm, the size of positive pole ear linkage section and negative lug linkage section is (q/5) * (3q/5) mm.
The step 4 of above-mentioned manufacture method) in, preferably, in the time that the sheet number of positive plate reaches 4～8, complete the lamination of lithium ion battery cell.
By existing conventional method, the battery core 1 of above-mentioned flexible stack type lithium ion battery is carried out aluminum plastic film encapsulation, fluid injection, changed into and secondary encapsulation, can obtain flexible stack type lithium ion battery 2.Fig. 5 is the effect schematic diagram of the flexible stack type lithium ion battery 2 of gained while carrying out bending, and the angle of bend in figure is 120 °.Gained battery is through overtesting, and in use capacity all can normally be brought into play.The above-mentioned stack type lithium ion battery making is carried out respectively to safety of acupuncture test, eminence fall-down test, simulating vibration table test and squeeze test, in all processs of the test battery all without exploding, without phenomenon on fire.
Claims (7)
1. the battery core of a flexible stack type lithium ion battery (1), comprises negative plate (12), barrier film (13) and positive plate (11), it is characterized in that:
Described positive plate (11) is provided with positive electrode coating area (111) and anodal blank foil district (112), described positive electrode coating area (111) is coated with positive electrode, and described positive electrode coating area (111) and interval, anodal blank foil district (112) arrange;
Described negative plate (12) is provided with negative material coating area (121) and the blank foil district of negative pole (122), described negative material coating area (121) is coated with negative material, and interval, the blank foil district (122) of described negative material coating area (121) and negative pole arranges;
The number of the number of the positive electrode coating area (111) on described positive plate (11) and the negative material coating area (121) on negative plate (12) is identical and position is corresponding, and the number in the number in the blank foil district of positive pole (112) on positive plate (11) and the negative pole blank foil district (122) on negative plate (12) is identical and position is corresponding; The upper number of positive electrode coating area (111) of described positive plate (11) and the number in anodal blank foil district (112) and the number of the upper negative material coating area (121) of negative plate (12) and the number in the blank foil district of negative pole (122) are integer;
Described negative plate (12), barrier film (13) and positive plate (11) is along perpendicular to its surperficial direction successively stacked battery core (1) that connects and composes flexible stack type lithium ion battery.
2. the battery core of flexible stack type lithium ion battery according to claim 1 (1), is characterized in that: on described positive plate (11), be provided with positive pole ear linkage section (113); On described negative plate (12), be provided with negative lug linkage section (123).
3. the battery core of flexible stack type lithium ion battery according to claim 2 (1), it is characterized in that: on described positive plate (11), positive electrode coating area (111) is 1:0.03～0.3 with the length ratio in anodal blank foil district (112), described negative plate (12) is upper, and negative material coating area (121) are 1:0.02～0.2 with the length ratio in the blank foil district of negative pole (122).
4. according to the battery core of the flexible stack type lithium ion battery described in any one in claim 1～3 (1), it is characterized in that: when positive plate (11) is of a size of: length is 100～300mm, width while being 10～70mm, the number in the upper anodal blank foil district (112) of positive plate (11) is for being more than or equal to 1 and be less than or equal to 4.
5. the battery core of flexible stack type lithium ion battery according to claim 4 (1), is characterized in that: the length in the upper anodal blank foil district (112) of described positive plate (11) is 3～6mm.
6. the battery core of flexible stack type lithium ion battery according to claim 4 (1), it is characterized in that: described negative plate (12) is of a size of: length is compared with the large 2～4mm of positive plate (11), and width is compared with the large 3～5mm of positive plate (11).
7. the battery core of flexible stack type lithium ion battery according to claim 6 (1), is characterized in that: the length in the upper blank foil district of negative pole of described negative plate (12) (122) is 2～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420207361.9U CN203850391U (en) | 2014-04-25 | 2014-04-25 | Cell of bendable laminated lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420207361.9U CN203850391U (en) | 2014-04-25 | 2014-04-25 | Cell of bendable laminated lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN203850391U true CN203850391U (en) | 2014-09-24 |
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| CN201420207361.9U Expired - Lifetime CN203850391U (en) | 2014-04-25 | 2014-04-25 | Cell of bendable laminated lithium ion battery |
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| Country | Link |
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| CN (1) | CN203850391U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928715A (en) * | 2014-04-25 | 2014-07-16 | 广西师范大学 | Battery cell of flexible laminated lithium ion battery, manufacturing method of battery cell as well as battery |
-
2014
- 2014-04-25 CN CN201420207361.9U patent/CN203850391U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928715A (en) * | 2014-04-25 | 2014-07-16 | 广西师范大学 | Battery cell of flexible laminated lithium ion battery, manufacturing method of battery cell as well as battery |
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