WO2020006967A1 - 一种无极耳固态锂电池 - Google Patents

一种无极耳固态锂电池 Download PDF

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WO2020006967A1
WO2020006967A1 PCT/CN2018/116822 CN2018116822W WO2020006967A1 WO 2020006967 A1 WO2020006967 A1 WO 2020006967A1 CN 2018116822 W CN2018116822 W CN 2018116822W WO 2020006967 A1 WO2020006967 A1 WO 2020006967A1
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layer
negative electrode
positive electrode
carrier
coating layer
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PCT/CN2018/116822
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English (en)
French (fr)
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杨维元
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惠州赛尔雷新能源科技有限公司
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/14—Cells with non-aqueous electrolyte
    • 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

Definitions

  • the invention relates to the field of lithium battery manufacturing, and in particular, to a solid lithium battery without electrodes.
  • the structure of existing lithium batteries can no longer meet the needs of microelectronic equipment, especially the existing lithium battery tabs, most of which are designed with nickel foil or tin foil. Increased the thickness of solid-state lithium batteries to a large extent.
  • the technical problem solved by the present invention is to provide a solid-state lithium battery without electrodes.
  • the ultra-thinness of the lithium battery can be realized; on the other hand, because of the electrodeless ears, various problems caused by the electrodes can be solved.
  • the technical solution of the present invention is: a non-ear solid lithium battery including a positive electrode, a negative electrode, and a separator layer, the positive electrode includes a positive electrode carrier and a positive electrode coating layer, and the negative electrode includes a negative electrode carrier And a negative electrode coating layer, a groove is provided on the positive electrode carrier and the negative electrode carrier, and one or both ends of the groove leak out from the positive electrode carrier and the On one side of the negative electrode carrier, the positive electrode coating layer is coated on the side of the positive electrode carrier provided with the grooves, and the negative electrode coating layer is coated on the negative electrode carrier.
  • One side of the groove; the separator layer is disposed between the positive electrode coating layer and the negative electrode coating layer, and the positive electrode and the negative electrode surround the separator layer, so The edges of the positive electrode and the negative electrode are sealed.
  • the positive electrode carrier and the negative electrode carrier each include five layers of materials, and the five layers of materials are sequentially stacked in the order of a PP layer, a first glue layer, a foil layer, a second glue layer, and a nylon layer.
  • the positive electrode coating layer and the negative electrode coating layer are coated on one side of the PP layer.
  • the bottom of the groove is one side of the foil layer.
  • the foil layer of the positive electrode carrier is an aluminum foil
  • the foil layer of the negative electrode carrier is a copper foil or a nickel foil.
  • the thickness of the PP layer is 0.01mm-0.07mm
  • the thickness of the first glue layer is 0.003mm-0.007mm
  • the thickness of the foil layer is 0.01mm-0.07mm
  • the thickness of the second glue layer is 0.003mm-0.007mm
  • the thickness of the nylon layer is 0.015mm-0.045mm.
  • the thickness of the positive electrode coating layer and the negative electrode coating layer is 0.05 mm-1 mm.
  • the separator layer is a PP film or a PE film.
  • the present invention uses a foil layer instead of the existing battery tab design, which not only solves various problems caused by the thickness of the tabs, but also enables ultra-thinning of lithium batteries.
  • the positive electrode carrier and the negative electrode carrier of the present invention both adopt a five-layer design.
  • the PP layer plays the role of encapsulation
  • the first glue layer and the second glue layer play the role of adhesion
  • the foil layer plays the role of waterproofing. Layers can increase strength.
  • the foil layer of the negative electrode carrier of the present invention adopts nickel foil or copper foil, on the one hand, it can solve the special application problem of lithium batteries, on the other hand, it can also solve the thickness problem of lithium batteries, which can be applied to more On thin electronic devices.
  • Fig. 1 is a sectional view of the present invention.
  • FIG. 2 is a cross-sectional view of the practical negative electrode carrier.
  • Numbers or letters in the figure represent the names or process names of the corresponding parts: 1. positive electrode, 11. positive electrode carrier, 12. positive electrode coating layer, 2. negative electrode, 21. negative electrode carrier, 22. negative electrode coating layer, 3. Diaphragm layer, 4. Groove, 5. PP layer, 6. First glue layer, 7. Foil layer, 8. Second glue layer, 9. Nylon layer.
  • An electrodeless solid lithium battery includes a positive electrode 1, a negative electrode 2, and a separator layer 3.
  • the positive electrode 1 includes a positive electrode carrier 11 and a positive electrode coating layer 12.
  • the negative electrode 2 includes a negative electrode carrier 21 and a negative electrode coating layer 22.
  • the body 11 and the negative electrode support body 21 are provided with a groove 4. One or both ends of the groove 4 leak out on one side of the positive electrode support body 11 and the negative electrode support body 21, and the positive electrode coating layer 12 is coated on the positive electrode support body 11.
  • the negative electrode coating layer 22 is coated on the side of the negative electrode carrier 21 provided with the groove 4; the separator layer 3 is provided between the positive electrode coating layer 12 and the negative electrode coating layer 22, and the positive electrode 1 and the negative electrode 2 wraps the separator layer 3, and the edges of the positive electrode 1 and the negative electrode 2 are sealed.
  • the positive electrode carrier 11 and the negative electrode carrier 21 each include five layers of materials, and the five layers of materials are sequentially stacked in the order of PP layer 5, first glue layer 6, foil layer 7, second glue layer 8, and nylon layer 9.
  • the positive electrode coating layer 12 and the negative electrode coating layer 22 are coated on one side of the PP layer 5.
  • the bottom of the groove 4 is one side of the foil layer 7.
  • the foil material layer 7 of the positive electrode carrier 11 is an aluminum foil
  • the foil material layer 7 of the negative electrode carrier 21 is a copper foil or a nickel foil. The role of the positive electrode carrier and the negative electrode carrier is to collect current.
  • the thickness of the PP layer 5 is 0.01 mm-0.07 mm
  • the thickness of the first glue layer 6 is 0.003 mm-0.007 mm
  • the thickness of the foil layer 7 is 0.01 mm-0.07 mm
  • the thickness of the second glue layer 8 is 0.003mm-0.007mm
  • the thickness of the nylon layer 9 is 0.015mm-0.045mm.
  • the thickness of the positive electrode coating layer 12 and the negative electrode coating layer 22 is 0.05 mm-1 mm.
  • the separator layer 3 is a PP film or a PE film.
  • the solid-state lithium battery without electrodes includes positive electrode 1, negative electrode 2, separator layer 3, and positive electrode 1 includes positive electrode carrier 11 and positive electrode coating.
  • the cloth layer 12 and the negative electrode 2 include a negative electrode support body 21 and a negative electrode coating layer 22.
  • a groove 4 is provided on the positive electrode support body 11 and the negative electrode support body 21.
  • the positive electrode coating layer 12 is coated on one side of the groove 4 provided in the positive electrode carrier 11, and the negative electrode coating layer 22 is coated on the side of the negative carrier 21 provided with the groove 4; the separator layer 3 is provided between the positive electrode coating layer 12 and the negative electrode coating layer 22, the positive electrode 1 and the negative electrode 2 surround the separator layer 3, and the edges of the positive electrode 1 and the negative electrode 2 are sealed.
  • the positive electrode coating layer 12 is made of a solvent, a positive electrode material, and an electrolyte material.
  • the negative electrode coating layer 22 is made of a solvent, a negative electrode material, and an electrolyte material.
  • Positive materials include, but are not limited to, lithium cobaltate, lithium manganate, lithium iron phosphate, ternary materials, conductive agents, graphene, carbon nanotubes, and polymer powder; negative materials: including but not limited to artificial graphite, natural graphite, Silicon carbon anode, conductive agent, graphene, carbon nanotubes, polymer gel powder; solvents: including but not limited to deionized water, NMP (nitromethylpyrrolidone), acetone, PS, EC; electrolyte materials: including but not Limited to DMC, EMC, DEC, PVDF, CMC, ⁇ -butyrolactone, lithium hexafluorophosphate, lithium bistrifluoromethylximide, silicon dioxide, ceramic powder.
  • the positive electrode carrier 11 and the negative electrode carrier 21 each include five layers of materials, and the five layers of materials are sequentially stacked in the order of PP layer 5, first glue layer 6, foil layer 7, second glue layer 8, and nylon layer 9.
  • the positive electrode coating layer 12 and the negative electrode coating layer 22 are coated on one side of the PP layer 5.
  • the bottom of the groove 4 is one side of the foil layer 7, and one or both ends of the groove 4 leak out on one side of the positive electrode carrier 11 and the negative electrode carrier 21; such a groove arrangement can ensure that the foil layer 7 becomes a tab, Replaces existing additional pole tabs.
  • the foil layer 7 of the positive electrode carrier 11 is an aluminum foil
  • the foil layer 7 of the negative electrode carrier 21 is a copper foil.
  • the thickness of the PP layer 5 is 0.05 mm
  • the thickness of the first glue layer 6 is 0.006 mm
  • the thickness of the foil layer 7 is 0.03 mm
  • the thickness of the second glue layer 8 is 0.005 mm
  • the thickness of the nylon layer 9 is 0.035mm.
  • the thickness of the positive electrode coating layer 12 and the negative electrode coating layer 22 is 0.35 mm.
  • the separator layer 3 is a PP film or a PE film.
  • the basic settings of the first embodiment and the second embodiment are the same.
  • the main difference is that the negative electrode carrier 21 is a nickel foil.

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Abstract

一种无极耳固态锂电池，包括正极(1)、负极(2)、隔膜层(3)，所述的正极(1)包括正极承载体(11)和正极涂布层(12)，所述的负极(2)包括负极承载体(21)和负极涂布层(22)，在所述的正极承载体(11)和所述的负极承载体(21)上均设有凹槽(4)，所述的凹槽(4)的一端或两端漏出在所述的正极承载体(11)和所述的负极承载体(21)的一边；采用箔材层(7)代替现有的电池极耳设计，不仅解决了因极耳厚度带来的各种问题，还可以实现锂电池的超薄化。

Description

一种无极耳固态锂电池 技术领域
本发明涉及锂电池制造领域，具体涉及一种无极耳固态锂电池。
背景技术
随着超薄化锂电池电的不断发展和改进，现有锂电池的结构已经不能适应微型电子设备的需求，尤其是现有的锂电池极耳，大部分采用镍箔或锡箔设计，在很大程度上增加了固态锂电池的厚度。
发明内容
本发明解决的技术问题是提供一种无极耳固态锂电池，一方面可以实现锂电池的超薄化，另一方面，因为无极耳设置，还可以解决锂电池因为极耳造成的各种问题。
为解决上述技术问题，本发明的技术方案是：一种无极耳固态锂电池，包括正极、负极、隔膜层，所述的正极包括正极承载体和正极涂布层，所述的负极包括负极承载体和负极涂布层，在所述的正极承载体和所述的负极承载体上均设有凹槽，所述的凹槽的一端或两端漏出在所述的正极承载体和所述的负极承载体的一边，所述的正极涂布层涂布在所述的正极承载体设有所述的凹槽的一面，所述的负极涂布层涂布在所述的负极承载体设有所述的凹槽的一面；所述的隔膜层设置在所述的正极涂布层和所述的负极涂布层之间，所述的正极和所述的负极包裹所述的隔膜层，所述的正极和所述的负极的边缘相密封。
优选的，所述的正极承载体和所述的负极承载体均包括五层材料，五层材料依次叠加的顺序为PP层、第一胶水层、箔材层、第二胶水层和尼龙层，所述的正极涂布层和所述的负极涂布层涂布在所述的PP层的一面。
优选的，所述的凹槽底部为所述的箔材层的一面。
优选的，所述的正极承载体的箔材层为铝箔，所述的负极承载体箔材层为铜箔或镍箔。
优选的，所述的PP层的厚度为0.01mm-0.07mm，所述的第一胶水层的厚度为0.003mm-0.007mm，所述的箔材层的厚度为0.01mm-0.07mm，所述的第二胶水层的厚度为0.003mm-0.007mm，所述的尼龙层的厚度为0.015mm-0.045mm。
优选的，所述的正极涂布层和所述的负极涂布层的厚度为0.05mm-1mm。
优选的，所述的隔膜层为PP膜或PE膜。
本发明实现的有益效果：本发明采用箔材层代替现有的电池极耳设计，不仅解决了因 极耳厚度带来的各种问题，还可以实现锂电池的超薄化。而且，本发明的正极承载体和负极承载体均采用五层设计，PP层起到封装的作用，第一胶水层和第二胶水层起到粘贴作用，箔材层起到防水的作用，尼龙层可以提高强度。同时，本发明负极承载体的箔材层采用镍箔或铜箔，一方面可以解决锂电池的特殊化应用问题，另一方面，还可以解决锂电池的厚度问题，可以应用在更多的超薄电子设备上。
附图说明
图1为本发明的截面图。
图2为本实用负极承载体的横截面图。
图中的数字或字母代表的相应部件的名称或流程名称：1.正极，11.正极承载体，12.正极涂布层，2.负极，21.负极承载体，22.负极涂布层，3.隔膜层，4.凹槽，5.PP层，6.第一胶水层，7.箔材层，8.第二胶水层，9.尼龙层。
附图仅用于示例性说明，不能理解为对本专利的限制；为了更好说明本实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对于本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的；相同或相似的标号对应相同或相似的部件；附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制。
具体实施方式
为了便于本领域技术人员理解，下面将结合附图以及实施例对本发明进行进一步详细描述。
一种无极耳固态锂电池，包括正极1、负极2、隔膜层3，正极1包括正极承载体11和正极涂布层12，负极2包括负极承载体21和负极涂布层22，在正极承载体11和负极承载体21上均设有凹槽4，凹槽4一端或两端漏出在正极承载体11和负极承载体21的一边，正极涂布层12涂布在正极承载体11设有的凹槽4的一面，负极涂布层22涂布在负极承载体21设有凹槽4的一面；隔膜层3设置在正极涂布层12和负极涂布层22之间，正极1和负极2包裹隔膜层3，正极1和负极2的边缘相密封。
具体的，正极承载体11和负极承载体21均包括五层材料，五层材料依次叠加的顺序为PP层5、第一胶水层6、箔材层7、第二胶水层8和尼龙层9，正极涂布层12和负极涂布层22涂布在PP层5的一面。
具体的，凹槽4底部为箔材层7的一面。
具体的，正极承载体11的箔材层7为铝箔，负极承载体21箔材层7为铜箔或镍箔。正极承载体和负极承载体的作用是集流。
具体的，PP层5的厚度为0.01mm-0.07mm，第一胶水层6的厚度为0.003mm-0.007mm，箔材层7的厚度为0.01mm-0.07mm，第二胶水层8的厚度为0.003mm-0.007mm，尼龙层9的厚度为0.015mm-0.045mm。
具体的，正极涂布层12和负极涂布层22的厚度为0.05mm-1mm。
具体的，隔膜层3为PP膜或PE膜。
实施例一
将前述的无极耳固态锂电池结合现实中具体的做法，做相应的阐述，具体如下：无极耳固态锂电池，包括正极1、负极2、隔膜层3，正极1包括正极承载体11和正极涂布层12，负极2包括负极承载体21和负极涂布层22，在正极承载体11和负极承载体21上均设有凹槽4，凹槽4一端或两端漏出在正极承载体11和负极承载体21的一边，正极涂布层12涂布在正极承载体11设有的凹槽4的一面，负极涂布层22涂布在负极承载体21设有凹槽4的一面；隔膜层3设置在正极涂布层12和负极涂布层22之间，正极1和负极2包裹隔膜层3，正极1和负极2的边缘相密封。正极涂布层12由溶剂、正极材料和电解液材料制成。负极涂布层22由溶剂、负极材料和电解液材料制成。正极材料包括但不限于钴酸锂、锰酸锂、磷酸铁锂、三元材料、导电剂、石墨烯、碳纳米管、聚合物胶粉；负极材料：包括但不限于人造石墨、天然石墨、硅碳负极、导电剂、石墨烯、碳纳米管、聚合物胶粉；溶剂：包括但不限于去离子水、NMP(氮甲基吡咯烷酮)、丙酮、PS、EC；电解液材料：包括但不限于DMC、EMC、DEC、PVDF、CMC、γ-丁内脂、六氟磷酸锂、双三氟甲基黄酰亚胺锂、二氧化硅、陶瓷粉。
具体的，正极承载体11和负极承载体21均包括五层材料，五层材料依次叠加的顺序为PP层5、第一胶水层6、箔材层7、第二胶水层8和尼龙层9，正极涂布层12和负极涂布层22涂布在PP层5的一面。
具体的，凹槽4底部为箔材层7的一面，凹槽4一端或两端漏出在正极承载体11和负极承载体21的一边；凹槽这样设置可以保证箔材层7成为极耳，代替现有的附加极耳。正极承载体11的箔材层7为铝箔，负极承载体21箔材层7为铜箔。
具体的，PP层5的厚度为0.05mm，第一胶水层6的厚度为0.006mm，箔材层7的厚度为0.03mm，第二胶水层8的厚度为0.005mm，尼龙层9的厚度为0.035mm。
具体的，正极涂布层12和负极涂布层22的厚度为0.35mm。
具体的，隔膜层3为PP膜或PE膜。
实施例二
实施例一和实施例二基本设置是一样的，主要的区别是：负极承载体21为镍箔。
显然，本发明的上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。

Claims (7)

  1. 一种无极耳固态锂电池，其特征在于：包括正极(1)、负极(2)、隔膜层(3)，所述的正极(1)包括正极承载体(11)和正极涂布层(12)，所述的负极(2)包括负极承载体(21)和负极涂布层(22)，在所述的正极承载体(11)和所述的负极承载体(21)上均设有凹槽(4)，所述的凹槽(4)的一端或两端漏出在所述的正极承载体(11)和所述的负极承载体(21)的一边，所述的正极涂布层(12)涂布在所述的正极承载体(11)设有所述的凹槽(4)的一面，所述的负极涂布层(22)涂布在所述的负极承载体(21)设有所述的凹槽(4)的一面；所述的隔膜层(3)设置在所述的正极涂布层(12)和所述的负极涂布层(22)之间，所述的正极(1)和所述的负极(2)包裹所述的隔膜层(3)，所述的正极(1)和所述的负极(2)的边缘相密封。
  2. 根据权利要求1所述的无极耳固态锂电池，其特征在于：所述的正极承载体(11)和所述的负极承载体(21)均包括五层材料，五层材料依次叠加的顺序为PP层(5)、第一胶水层(6)、箔材层(7)、第二胶水层(8)和尼龙层(9)，所述的正极涂布层(12)和所述的负极涂布层(22)涂布在所述的PP层(5)的一面。
  3. 根据权利要求2所述的无极耳固态锂电池，其特征在于：所述的凹槽(4)底部为所述的箔材层(7)的一面。
  4. 根据权利要求2或3所述的无极耳固态锂电池，其特征在于：所述的正极承载体(11)的箔材层(7)为铝箔，所述的负极承载体(21)箔材层(7)为铜箔或镍箔。
  5. 根据权利要求2所述的无极耳固态锂电池，其特征在于：所述的PP层(5)的厚度为0.01mm-0.07mm，所述的第一胶水层(6)的厚度为0.003mm-0.007mm，所述的箔材层(7)的厚度为0.01mm-0.07mm，所述的第二胶水层(8)的厚度为0.003mm-0.007mm，所述的尼龙层(9)的厚度为0.015mm-0.045mm。
  6. 根据权利要求1所述的超薄锂电池极耳，其特征在于：所述的正极涂布层(12)和所述的负极涂布层(22)的厚度为0.05mm-1mm。
  7. 根据权利要求1所述的超薄锂电池极耳，其特征在于：所述的隔膜层(3)为PP膜或PE膜。
PCT/CN2018/116822 2018-07-06 2018-11-22 一种无极耳固态锂电池 WO2020006967A1 (zh)

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