CN111900489A - Z-shaped laminated button type lithium ion battery - Google Patents
Z-shaped laminated button type lithium ion battery Download PDFInfo
- Publication number
- CN111900489A CN111900489A CN202010936537.4A CN202010936537A CN111900489A CN 111900489 A CN111900489 A CN 111900489A CN 202010936537 A CN202010936537 A CN 202010936537A CN 111900489 A CN111900489 A CN 111900489A
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- negative
- positive
- lithium ion
- ion battery
- diaphragm
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 60
- 239000003792 electrolyte Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000006258 conductive agent Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 239000007774 positive electrode material Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 3
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 3
- 229910002102 lithium manganese oxide Inorganic materials 0.000 claims description 3
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 241000463219 Epitheca Species 0.000 claims 6
- 239000012528 membrane Substances 0.000 claims 2
- 230000006978 adaptation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 238000003475 lamination Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention relates to a Z-shaped laminated button lithium ion battery, which comprises a shell; the lithium ion battery core comprises a plurality of negative plates and a plurality of positive plates, wherein the negative plates and the positive plates are overlapped in a vertically crossed manner; the side ends of two adjacent negative plates are connected into a whole, so that a plurality of negative plates are folded in a Z-shaped roundabout manner, the outer surfaces of the negative plates are wrapped with diaphragms, and an integrated negative plate/diaphragm is formed; electrolyte is arranged in the shell and is in contact with the negative plate or the positive plate which is not wrapped by the diaphragm, the negative tab is led out from the negative plate, and the positive tab is led out from the positive plate. The advantages are that: the battery core has high space utilization rate, high energy density and good electrical conductivity.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a Z-shaped laminated button type lithium ion battery.
Background
In recent years, intelligent wearable equipment is rapidly developed, and great market demands are provided for button type lithium ion batteries. The button lithium ion battery is widely applied to digital products such as computer mainboards, electronic watches, electronic dictionaries, Bluetooth headsets, toys and the like. At present, button lithium ion batteries mainly adopt two manufacturing methods: 1) the lamination mode is as follows: punching and cutting the negative plate, the diaphragm and the positive plate into circles, and sequentially laminating the negative plate, the diaphragm, the positive plate, the diaphragm, … … and the negative plate in sequence to manufacture a laminated battery cell; 2) the winding mode is as follows: the negative plate, the diaphragm and the positive plate are cut into strips, and the strips are wound into a cylindrical battery cell by a winding machine according to the sequence of the diaphragm, the negative plate, the diaphragm and the positive plate. The above method can ensure that a layer of diaphragm is arranged between the positive plate and the negative plate so as to block the direct connection of the positive plate and the negative plate to cause short circuit.
In fact, the button lithium ion battery on the market is mainly based on the method, and the above manufacturing methods have advantages, but the defects are particularly prominent. The lamination type battery core has high space utilization rate, high energy density and good conductivity, but the processing and manufacturing are more complicated, the working procedures are complex, the efficiency is too low, and the battery cost is too high. The winding mode has simple and convenient manufacturing process and convenient production, but the space utilization rate of the battery core is low, the energy density is low and the electrical conductivity is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a Z-shaped laminated button lithium ion battery, which effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a Z-shaped laminated button lithium ion battery comprises a shell, wherein the shell is provided with a positive conductive end and a negative conductive end; the lithium ion battery core comprises a plurality of negative plates and a plurality of positive plates, and the negative plates and the positive plates are overlapped in a vertically crossed manner; adjacent two negative plates are connected into a whole at the side end, so that a plurality of negative plates are bent and folded in a Z shape at the joint, the outer surfaces of the negative plates are hermetically wrapped with an insulating diaphragm to form an integrated negative plate/diaphragm, a plurality of positive plates are respectively clamped between the adjacent two negative plates, or adjacent two positive plates are connected into a whole at the side end, so that a plurality of positive plates are bent and folded in a Z shape at the joint, the outer surfaces of the positive plates are hermetically wrapped with an insulating diaphragm to form an integrated positive plate/diaphragm, and a plurality of negative plates are respectively clamped between the adjacent two positive plates; the shell is filled with electrolyte, the electrolyte is in electrical contact with the negative plate or the positive plate which is not wrapped by the diaphragm, the negative plate is provided with a negative lug connected with the negative conductive end in a leading-out mode, and the positive plate is provided with a positive lug connected with the positive conductive end in a leading-out mode.
On the basis of the technical scheme, the invention can be further improved as follows.
When the negative electrode sheet and the diaphragm form an integrated negative electrode sheet/diaphragm, the negative electrode tab is led out from the end part of the uppermost negative electrode sheet; or when the positive plate and the diaphragm form an integrated positive plate/diaphragm, the positive tab is provided at the end of the negative plate positioned at the lowest layer.
Further, when the negative electrode sheet and the diaphragm form an integrated negative electrode sheet/diaphragm, the side ends of two adjacent positive electrode sheets are connected into a whole, so that the positive electrode sheets are folded in a zigzag manner at the connection position, and the positive electrode tab is led out from the end part of the positive electrode sheet positioned at the lowest layer; or when the positive plate and the diaphragm form an integrated positive plate/diaphragm, the side ends of two adjacent negative plates are connected into a whole, so that the positive plates are folded in a zigzag shape at the joint, and the negative tab is led out from the end of the negative plate on the uppermost layer.
Further, the casing is a cylindrical casing, the corresponding negative electrode plate and the positive electrode plate are circular plates with matched diameters, and the lithium ion battery core is a cylindrical component.
Furthermore, the diameter of the cylinder of the lithium ion battery core is 6mm-26mm, and the height of the lithium ion battery core is 1.6mm-8 mm.
Further, the casing comprises a lower casing and an upper casing, wherein the lower casing is cylindrical and has an open upper end, the upper casing is hermetically arranged at the open upper end of the lower casing, and the lower casing and the upper casing are respectively and correspondingly provided with a positive electrode conductive end and a negative electrode conductive end.
Further, the lower case is a cylindrical steel case, an aluminum-plastic film case or a plastic case, the upper case includes a cylindrical bowl-shaped case with an open lower end and a sealing ring sleeved outside the bowl-shaped case, the lower end of the upper case is inserted into the open upper end of the upper case, the sealing ring is hermetically connected with the inner wall of the open upper end of the lower case, the bowl-shaped case is a conductive metal member, a steel case, an aluminum-plastic film case or a plastic case, and the lithium ion battery cell is a cylindrical member adapted to the case.
Further, the negative electrode piece comprises graphite, CMC, a conductive agent, SBR and a copper current collector, and the negative electrode lug is a copper current collector, a nickel strip, a copper strip or a nickel-plated copper strip.
Further, the diaphragm is a PP, PE, PP/PE composite film, non-woven fabric diaphragm or gel diaphragm.
Further, the positive plate comprises a positive electrode material, PVDF (polyvinylidene fluoride), a conductive agent and an aluminum current collector, wherein the positive electrode material is any one or a mixture of more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium iron phosphate and lithium manganese oxide, the conductive agent material is any one or a mixture of more of carbon nano tube, graphene, conductive carbon black, conductive graphite and acetylene black, and the positive electrode lug is an aluminum current collector, an aluminum tape or an aluminum-nickel composite tape.
The invention has the beneficial effects that: structural design is reasonable, and electric core space utilization is high, and energy density is big, and electric conductivity is good, and production efficiency is high.
Drawings
FIG. 1 is a schematic structural diagram of a Z-shaped laminated button lithium ion battery of the present invention;
FIG. 2 is a schematic structural diagram of a lithium ion battery cell in the Z-shaped laminated button lithium ion battery of the present invention;
FIG. 3 is a schematic diagram of the production structure of the integrated negative plate/diaphragm in the Z-shaped laminated button lithium ion battery of the present invention;
FIG. 4 is a schematic diagram of the production structure of the integrated positive plate/diaphragm in the Z-shaped lamination button lithium ion battery of the present invention;
FIG. 5 is a schematic structural diagram of a single positive plate with a positive tab in the Z-shaped laminated button lithium ion battery of the present invention;
fig. 6 is a structural schematic diagram of a single negative plate with negative tabs in the Z-type laminated button lithium ion battery of the invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a housing; 2. a lithium ion battery cell; 11. a lower case; 12. an upper shell; 21. a negative plate; 22. a positive plate; 23. a diaphragm; 121. a bowl-shaped housing; 122. a seal ring; 211. a negative tab; 221. and a positive tab.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The first embodiment is as follows: as shown in fig. 1, 2 and 5, the Z-shaped laminated button lithium ion battery of the present embodiment includes a casing 1, where the casing 1 has a positive conductive end and a negative conductive end; a lithium ion battery cell 2, wherein the lithium ion battery cell 2 comprises a plurality of negative plates 21 and a plurality of positive plates 22, and the plurality of negative plates 21 and the plurality of positive plates 22 are overlapped in an up-and-down crossing manner; the adjacent negative plates 21 are connected into a whole at the side ends, so that the negative plates 21 are folded in a zigzag shape at the connection position, the outer surfaces of the negative plates 21 are hermetically wrapped with insulating diaphragms 23 to form an integrated negative plate/diaphragm, and the positive plates 22 are respectively clamped between the adjacent negative plates 21 (one positive plate 22 is clamped between each two negative plates 21); the case 1 is filled with an electrolyte, and the electrolyte is electrically contacted with the positive electrode plate 22; the negative tab 211 is extended from the end of the uppermost negative electrode sheet 21, and the positive tab 221 connected to the positive conductive terminal is extended from any one of the positive electrode sheets 22.
Example two: as shown in fig. 1 and 2, the Z-shaped laminated button lithium ion battery of the present embodiment includes a casing 1, where the casing 1 has a positive conductive end and a negative conductive end; a lithium ion battery cell 2, wherein the lithium ion battery cell 2 comprises a plurality of negative plates 21 and a plurality of positive plates 22, and the plurality of negative plates 21 and the plurality of positive plates 22 are overlapped in an up-and-down crossing manner; the adjacent negative plates 21 are connected into a whole at the side ends, so that the negative plates 21 are folded in a zigzag shape at the connection position, the outer surfaces of the negative plates 21 are hermetically wrapped with insulating diaphragms 23 to form an integrated negative plate/diaphragm, and the positive plates 22 are respectively clamped between the adjacent negative plates 21 (one positive plate 22 is clamped between each two negative plates 21); the case 1 is filled with an electrolyte, and the electrolyte is electrically contacted with the positive electrode plate 22; the side ends of two adjacent positive electrode sheets 22 are connected into a whole, so that the positive electrode sheets 22 are folded in a zigzag shape at the connection position to form an integrated positive electrode sheet, the positive electrode tab 221 is provided at the end of the negative electrode sheet 22 positioned at the lowermost layer, and the positive electrode tab 221 is provided at the end of the positive electrode sheet 22 positioned at the lowermost layer.
Example three: as shown in fig. 1, 2 and 6, the Z-shaped laminated button lithium ion battery of the present embodiment includes a casing 1, where the casing 1 has a positive conductive end and a negative conductive end; a lithium ion battery cell 2, wherein the lithium ion battery cell 2 comprises a plurality of negative plates 21 and a plurality of positive plates 22, and the plurality of negative plates 21 and the plurality of positive plates 22 are overlapped in an up-and-down crossing manner; the adjacent positive plates 22 are connected into a whole at the side ends, so that the positive plates 22 are folded in a zigzag shape at the connection position, the outer surfaces of the positive plates 22 are hermetically wrapped with an insulating diaphragm 23 to form an integrated positive plate/diaphragm, and the negative plates 21 are respectively clamped between the adjacent positive plates 22 (one negative plate 21 is clamped between each positive plate 22); the case 1 is filled with an electrolyte, and the electrolyte is in electrical contact with the negative electrode sheet 21; a negative tab 211 connected to the negative conductive terminal is provided on any one of the negative electrode sheets 21, and a positive tab 221 is provided on the end of the lowermost positive electrode sheet 22.
Example four: as shown in fig. 1 and 2, the Z-shaped laminated button lithium ion battery of the present embodiment includes a casing 1, where the casing 1 has a positive conductive end and a negative conductive end; a lithium ion battery cell 2, wherein the lithium ion battery cell 2 comprises a plurality of negative plates 21 and a plurality of positive plates 22, and the plurality of negative plates 21 and the plurality of positive plates 22 are overlapped in an up-and-down crossing manner; the adjacent positive plates 22 are connected into a whole at the side ends, so that the positive plates 22 are folded in a zigzag shape at the connection position, the outer surfaces of the positive plates 22 are hermetically wrapped with an insulating diaphragm 23 to form an integrated positive plate/diaphragm, and the negative plates 21 are respectively clamped between the adjacent positive plates 22 (one negative plate 21 is clamped between each positive plate 22); the case 1 is filled with an electrolyte, and the electrolyte is in electrical contact with the negative electrode sheet 21; the adjacent negative electrode sheets 21 are integrally connected at their side ends, so that the positive electrode sheets 22 are folded in a zigzag shape at their joints to form an integrated negative electrode sheet, and the negative electrode tab 211 is provided at the end of the uppermost negative electrode sheet 21, and the positive electrode tab 221 is provided at the end of the lowermost positive electrode sheet 22.
In the four embodiments, during the manufacturing process of the integrated negative plate/diaphragm or the integrated positive plate/diaphragm, the integrated negative plate or the integrated positive plate is prepared, the diaphragm 23 is covered on the two surfaces of the integrated negative plate or the integrated positive plate, and then the parts of the diaphragm 23 on the two surfaces, which are more than the integrated negative plate or the integrated positive plate, are bonded and fixed with each other, so that the integrated negative plate or the integrated positive plate is completely wrapped by the diaphragm to form a complete and sealed diaphragm 23 bag, and is tightly wrapped outside the integrated negative plate or the integrated positive plate (as shown in fig. 3 and 4), and then the redundant diaphragm 23 is cut according to the shape of the integrated negative plate or the integrated positive plate.
On the basis of the four embodiments, the application also includes the following preferred embodiments:
in some preferred embodiments, the case 1 is a cylindrical case, the negative electrode sheet 21 and the positive electrode sheet 22 are circular sheets having matching diameters, and the lithium ion battery cell 2 is a cylindrical member.
In this embodiment, the housing 1 and the lithium ion battery cell 2 are both cylindrical members with a shape adapted thereto, and the appearance is beautiful.
More preferably, the diameter of the cylinder of the lithium ion battery core 2 is 6mm-26mm, and the height is 1.6mm-8 mm.
In this embodiment, the size of the lithium ion battery cell 2 is designed to be suitable for various fields of application on the market, and it should be noted that: the specific size of the battery can be designed and adjusted according to market needs, and the battery can be safely and well used without influence on performance.
More specifically, the casing 1 includes a cylindrical lower casing 11 with an open upper end and a cylindrical upper casing 12, the upper casing 12 is hermetically disposed at the open upper end of the lower casing 11, and the lower casing 11 and the upper casing 12 are respectively provided with a positive electrode conductive terminal and a negative electrode conductive terminal.
In this embodiment, generally, the ends of the lower case 11 and the upper case 12 away from each other are respectively and correspondingly provided as a positive electrode conductive end and a negative electrode conductive end, and the split case design facilitates the assembly of the lithium ion battery cell 2, i.e., the production and manufacture of the whole battery.
Further, the lower case 11 is a cylindrical steel case, an aluminum-plastic film case, or a plastic case, the upper case 12 includes a cylindrical bowl-shaped case 121 having an open lower end, and a sealing ring 122 fitted around the bowl-shaped case 121, the lower end of the upper case 12 is inserted into the open upper end of the upper case 12, the sealing ring 122 is hermetically connected to the inner wall of the open upper end of the lower case 11, the bowl-shaped case 121 is a conductive metal member, a steel case, an aluminum-plastic film case, or a plastic case, and the lithium ion battery cell 2 is a cylindrical member adapted to the case 1.
In this embodiment, the lower shell 11 and the upper shell 12 are made of suitable materials, so that the production is easy, the assembly between the two is simple and rapid, and the sealing performance of the joint is better.
Preferably, the negative electrode tab 21 includes graphite, CMC, a conductive agent, SBR, and a copper current collector, and the negative electrode tab 211 is a copper current collector, a nickel strip, a copper strip, or a nickel-plated copper strip.
Preferably, the separator 23 is a PP, PE, PP/PE composite film, nonwoven fabric separator, or gel separator.
Preferably, the positive plate 22 includes a positive electrode material, PVDF, a conductive agent and an aluminum current collector, wherein the positive electrode material is any one or a mixture of more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium iron phosphate and lithium manganese oxide, the conductive agent material is any one or a mixture of more of carbon nanotube, graphene, conductive carbon black, conductive graphite and acetylene black, and the positive tab 221 is an aluminum current collector, an aluminum tape or an aluminum-nickel composite tape
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A Z-shaped laminated button lithium ion battery is characterized by comprising:
a housing (1), the housing (1) having a positive conductive end and a negative conductive end;
the lithium ion battery comprises a lithium ion battery core (2), wherein the lithium ion battery core (2) comprises a plurality of negative plates (21) and a plurality of positive plates (22), and the negative plates (21) and the positive plates (22) are overlapped in an up-and-down crossed manner; the adjacent two negative plates (21) are connected into a whole at the side end, so that the negative plates (21) are folded in a Z-shaped roundabout mode at the joint, the outer surfaces of the negative plates (21) are hermetically wrapped with an insulating diaphragm (23) to form an integrated negative plate/diaphragm, the positive plates (22) are respectively clamped between the adjacent negative plates (21), or the adjacent positive plates (22) are connected into a whole at the side end, so that the positive plates (22) are folded in a Z-shaped roundabout mode at the joint, the outer surfaces of the positive plates (22) are hermetically wrapped with an insulating diaphragm (23) to form an integrated positive plate/diaphragm, and the negative plates (21) are respectively clamped between the adjacent positive plates (22);
the casing (1) intussuseption is filled with electrolyte, electrolyte with not parcel diaphragm (23) negative pole piece (21) or positive plate (22) electric contact, negative pole piece (21) draw forth be equipped with negative pole ear (211) that the electrically conductive end of negative pole is connected, positive plate (22) draw forth be equipped with anodal ear (221) that the electrically conductive end of positive pole is connected.
2. The Z-type laminated button lithium ion battery of claim 1, wherein: when the negative electrode sheet (21) and the diaphragm (23) form an integrated negative electrode sheet/diaphragm, the negative electrode tab (211) is led out from the end part of the negative electrode sheet (21) positioned on the uppermost layer; or when the positive electrode sheet (22) and the diaphragm (23) form an integrated positive electrode sheet/diaphragm, the end part of the positive electrode sheet (22) positioned at the lowest layer is provided with the positive electrode lug (221) in a leading-out mode.
3. The Z-type laminated button lithium ion battery of claim 2, wherein: when the negative electrode sheet (21) and the diaphragm (23) form an integrated negative electrode sheet/diaphragm, the side ends of two adjacent positive electrode sheets (22) are connected into a whole, so that the positive electrode sheets (22) are folded in a zigzag manner at the joint, and the end of the positive electrode sheet (22) positioned at the lowest layer is provided with the positive electrode lug (221) in a leading-out manner; or when the positive plate (22) and the diaphragm (23) form an integrated positive plate/diaphragm, the side ends of the adjacent two negative plates (21) are connected into a whole, so that the positive plates (22) are folded in a zigzag manner at the joint, and the end of the negative plate (21) positioned at the uppermost layer is provided with the negative electrode lug (211) in a leading-out manner.
4. The Z-type laminated button lithium ion battery according to any one of claims 1 to 3, wherein: the lithium ion battery is characterized in that the shell (1) is a cylindrical shell, the negative plate (21) and the positive plate (22) are circular sheets with matched diameters correspondingly, and the lithium ion battery core (2) is a cylindrical component.
5. The Z-type laminated button lithium ion battery of claim 4, wherein: the diameter of the cylinder of the lithium ion battery core (2) is 6mm-26mm, and the height is 1.6mm-8 mm.
6. The Z-type laminated button lithium ion battery of claim 4, wherein: casing (1) includes cylindric and upper end open inferior valve (11) and cylindric epitheca (12), epitheca (12) seal set up in the uncovered department in upper end of inferior valve (11), inferior valve (11) and epitheca (12) correspond respectively and are equipped with anodal conducting terminal and negative pole conducting terminal.
7. The Z-type laminated button lithium ion battery of claim 6, wherein: inferior valve (11) are cylindric steel casing, plastic-aluminum membrane shell or plastic housing, epitheca (12) are located including the open cylindric bowl shape casing of lower extreme (121) and cover bowl shape casing (121) outside sealing washer (122), epitheca (12) lower extreme inserts in the upper end of epitheca (12) is spacious, just sealing washer (122) with the open inner wall sealing connection in upper end of inferior valve (11), bowl shape casing (121) are electrically conductive metal component, steel casing, plastic-aluminum membrane shell or plastic housing, lithium ion battery core (2) be with the cylindric component of casing (1) adaptation.
8. The Z-type laminated button lithium ion battery according to any one of claims 1 to 3, wherein: the negative plate (21) comprises graphite, CMC, a conductive agent, SBR and a copper current collector, and the negative lug (211) is a copper current collector, a nickel strip, a copper strip or a nickel-plated copper strip.
9. The Z-type laminated button lithium ion battery of claim 8, wherein: the diaphragm (23) is a PP, PE, PP/PE composite film, non-woven fabric diaphragm or gel diaphragm.
10. The Z-type laminated button lithium ion battery of claim 8, wherein: the positive plate (22) comprises a positive electrode material, PVDF (polyvinylidene fluoride), a conductive agent and an aluminum current collector, wherein the positive electrode material is any one or a mixture of more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium iron phosphate and lithium manganese oxide, the conductive agent material is any one or a mixture of more of carbon nano tube, graphene, conductive carbon black, conductive graphite and acetylene black, and the positive electrode lug (221) is an aluminum current collector, an aluminum tape or an aluminum-nickel composite tape.
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| CN202010936537.4A CN111900489A (en) | 2020-09-08 | 2020-09-08 | Z-shaped laminated button type lithium ion battery |
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| DE102021111374A1 (en) | 2021-05-03 | 2022-11-03 | Bayerische Motoren Werke Aktiengesellschaft | Method for manufacturing a battery cell and battery cell |
| CN115347204A (en) * | 2021-05-14 | 2022-11-15 | 中创新航科技股份有限公司 | Battery manufacturing method and battery |
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| JP2017050243A (en) * | 2015-09-04 | 2017-03-09 | シチズン時計株式会社 | Flat-type battery |
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