CN105390751B - High-safety flexible package lithium ion battery core - Google Patents

High-safety flexible package lithium ion battery core Download PDF

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Publication number
CN105390751B
CN105390751B CN201510948772.2A CN201510948772A CN105390751B CN 105390751 B CN105390751 B CN 105390751B CN 201510948772 A CN201510948772 A CN 201510948772A CN 105390751 B CN105390751 B CN 105390751B
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tab
negative electrode
bag
plate
positive
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CN201510948772.2A
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CN105390751A (en
Inventor
薛永
谢志懋
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Foshan City Xinyuan Electronics Co ltd
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Foshan City Xinyuan Electronics Co ltd
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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a flexible package lithium ion battery core with high safety, belongs to the field of battery preparation, and particularly relates to the field of lithium ion battery preparation, and is characterized in that: the inside of the bag-type negative plate is provided with a negative plate, the outside of the negative plate is wrapped with a diaphragm bag, the top of the negative plate is provided with a negative nickel tab, the lower part of the negative nickel tab is coated with a negative tab glue, the top of the positive plate is provided with a positive aluminum tab, the lower part of the positive aluminum tab is coated with a positive tab glue, the bag type negative plate and the positive plate are overlapped in a cross mode in multiple layers, wherein the first layer and the last layer are both bag type negative plates, and the positive aluminum tab and the negative nickel tab are located on the same side of the battery cell. The invention can not only improve the safety performance of the lithium ion battery and the product qualification rate thereof, but also avoid the short circuit problem caused by heating under abnormal conditions of overshoot, impact and drop.

Description

High-safety flexible package lithium ion battery core
Technical Field
The invention relates to the field of battery preparation, in particular to the field of lithium ion battery preparation.
Background
At present, the manufacturing mode of the lithium ion battery mainly comprises a winding structure and a lamination structure, and the lamination type lithium ion battery is favored by people in terms of simple manufacturing process and low manufacturing cost and becomes the main mode of the current lithium ion battery manufacturing. The current lamination type battery is mainly manufactured by sequentially laminating a negative electrode, a diaphragm and a positive electrode, but has the defects of low qualification rate, poor product quality, short circuit caused by dust and the like.
Disclosure of Invention
The invention discloses a flexible package lithium ion battery core with high safety, which can improve the safety performance and the product qualification rate of a lithium ion battery and avoid the short circuit problem caused by heating under the abnormal conditions of overshoot, impact and drop.
The invention provides a high-safety flexible package lithium ion battery core, which comprises a bag type negative electrode plate 1 and a positive electrode plate 2, wherein a negative electrode plate 12 is arranged in the bag type negative electrode plate 1, a diaphragm bag 13 is wrapped outside the negative electrode plate 12, a negative electrode nickel tab 11 is arranged at the top of the negative electrode plate 12, a negative electrode tab gluing 14 is coated on the lower part of the negative electrode nickel tab 11, a positive electrode aluminum tab 21 is arranged at the top of the positive electrode plate 2, a positive electrode tab gluing 23 is coated on the lower part of the positive electrode aluminum tab 21, the bag type negative electrode plate 1 and the positive electrode plate 2 are overlapped in a crossing manner in multiple layers, wherein a first layer and a last layer are both the bag type negative electrode plate 1, and the positive electrode aluminum tab 21 and the negative electrode nickel tab 11 are positioned on the same side of the battery core. The diaphragm bag 13 is made of a ceramic diaphragm, and the ceramic diaphragm is prepared from the following materials in proportion: 1 to 5 percent of alumina, 0.1 to 1 percent of lithium compound, 1 to 12 percent of binder and 84 to 95 percent of solvent; the particle size of the alumina is 0.1-10 mu m;
the lithium compound comprises the following materials in proportion: li (Li) 5 La 3 Ta 2 O 12 10～15％、Li 5 La 3 Nb 2 O 12 20～25％、Li 6 BaLa 2 Ta 2 O 12 45～50％、Li 6 MgLa 2 Ta 2 O 12 10～20％；
The binder comprises the following materials in proportion: 5-15% of polyacrylamide, 50-58% of polyvinyl alcohol, 21% of polyethylene glycol and 11-16% of polyethylene oxide;
the solvent comprises the following materials in proportion: 19-25% tetrahydrofuran 75-81% of dimethylformamide.
The invention adopts a bag-making lamination mode, can prevent the dust of the negative pole piece from falling on the surface of the positive pole to cause the short circuit of the battery, and improves the safety performance of the battery; meanwhile, the negative electrode piece is made into a bag, so that the battery short circuit caused by the diaphragm under the shrinkage condition can be prevented.
The uncoated area of the positive electrode plate and the nickel electrode lug/aluminum electrode lug coated electrode lug glue can prevent the battery from being short-circuited due to the contact of the positive electrode plate and the negative electrode plate under abnormal conditions, and the safety performance of the lithium ion battery is improved.
The ceramic diaphragm protects the lithium ion battery core to cause the temperature to become large instantaneously under abnormal conditions such as overshoot, impact, drop and the like, and the ceramic diaphragm has the characteristics of high temperature resistance, excellent heat dissipation performance and the like, so that the safety performance of the battery is improved.
Drawings
Fig. 1 is a schematic view of a pouch type negative electrode sheet of the present invention.
Fig. 2 is a schematic view of a positive electrode sheet of the present invention.
Fig. 3 is a schematic diagram of a stack of pouch-type negative electrode sheets and positive electrode sheets of the present invention.
Symbol description in fig. 1-3: the negative electrode plate 1, the negative electrode nickel tab 11, the negative electrode plate 12, the diaphragm bag 13, the negative electrode tab glue 14, the positive electrode plate 2, the aluminum tab 21 and the positive electrode tab glue 23.
Detailed Description
As shown in figures 1-3, a high-safety flexible package lithium ion battery core is provided, a bag-type negative electrode sheet 1 and a positive electrode sheet 2 are arranged in the bag-type negative electrode sheet 1, a diaphragm bag 13 is wrapped outside the negative electrode sheet 12, a negative electrode nickel tab 11 is arranged at the top of the negative electrode sheet 12, a negative electrode tab gluing 14 is coated on the lower part of the negative electrode nickel tab 11, a positive electrode aluminum tab 21 is arranged at the top of the positive electrode sheet 2, a positive electrode tab gluing 23 is coated on the lower part of the positive electrode aluminum tab 21, the bag-type negative electrode sheet 1 and the positive electrode sheet 2 are overlapped in a crossing manner in multiple layers, wherein a first layer and a last layer are both the bag-type negative electrode sheet 1, and the positive electrode aluminum tab 21 and the negative electrode nickel tab 11 are positioned on the same side of the battery core.
The common lamination number of the bag type negative plate is 13 layers, 31 layers and 41 layers, and the corresponding positive plate is 12 layers, 30 layers and 40 layers.
The diaphragm bag 13 is made of a ceramic diaphragm, and the ceramic diaphragm is prepared from the following materials in proportion: 3.3% of alumina, 0.7% of lithium compound, 12% of binder and 84% of solvent;
the particle size of the alumina is 0.1-10 mu m;
the lithium compound comprises the following materials in proportion: li (Li) 5 La 3 Ta 2 O 12 12％、Li 5 La 3 Nb 2 O 12 22％、Li 6 BaLa 2 Ta 2 O 12 50％、Li 6 MgLa 2 Ta 2 O 12 16％；
The binder comprises the following materials in proportion: 8% of polyacrylamide, 58% of polyvinyl alcohol, 21% of polyethylene glycol and 13% of polyethylene oxide;
the solvent comprises the following materials in proportion: 22% of tetrahydrofuran and 78% of dimethylformamide.
Compared with the traditional battery cell, the invention has the following performance:
the invention adopts a bag-making lamination mode, is obviously superior to the traditional lamination battery cell in the aspect of safety performance, can prevent the dust of the negative electrode plate from falling on the surface of the positive electrode to cause short circuit of the battery, and improves the safety performance of the battery; at the same time, the method comprises the steps of, the negative pole piece is made into a bag to prevent the diaphragm from causing short circuit of the battery under the shrinkage condition.
The uncoated area of the positive electrode plate and the nickel electrode lug/aluminum electrode lug coated electrode lug glue can prevent the battery from being short-circuited due to the contact of the positive electrode plate and the negative electrode plate under abnormal conditions, and the safety performance of the lithium ion battery is improved.
The ceramic diaphragm protects the lithium ion battery core to cause the temperature to become large instantaneously under abnormal conditions such as overshoot, impact, drop and the like, and the ceramic diaphragm has the characteristics of high temperature resistance, excellent heat dissipation performance and the like, so that the safety performance of the battery is improved.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present invention and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (1)

1. The flexible package lithium ion battery core with high safety comprises a bag type negative plate (1) and a positive plate (2), and is characterized in that: the battery pack is characterized in that a negative electrode plate (12) is arranged inside the bag-type negative electrode plate (1), a diaphragm bag (13) is wrapped outside the negative electrode plate (12), a negative electrode nickel tab (11) is arranged at the top of the negative electrode plate (12), negative electrode tab gluing (14) is coated on the lower part of the negative electrode nickel tab (11), a positive electrode aluminum tab (21) is arranged at the top of the positive electrode plate (2), a positive electrode tab gluing (23) is coated on the lower part of the positive electrode aluminum tab (21), the bag-type negative electrode plate (1) and the positive electrode plate (2) are overlapped in a cross mode in multiple layers, wherein the first layer and the last layer are both the bag-type negative electrode plate (1), and the positive electrode aluminum tab (21) and the negative electrode nickel tab (11) are positioned on the same side of the battery cell;
the material of the diaphragm bag (13) is a ceramic diaphragm, and the material proportion of the ceramic diaphragm is as follows: 1 to 5 percent of alumina, 0.1 to 1 percent of lithium compound 1-12% of binder and 84-95% of solvent;
the particle size of the alumina is 0.1-10 mu m;
said lithium Compounds of formula (I) the material ratio of (1) is as follows: li (Li) 5 La 3 Ta 2 O 12 10～15％、Li 5 La 3 Nb 2 O 12 20～25％、Li 6 BaLa 2 Ta 2 O 12 45～50％、Li 6 MgLa 2 Ta 2 O 12 10～20％；
The binder comprises the following materials in proportion: 5-15% of polyacrylamide, 50-58% of polyvinyl alcohol, 21% of polyethylene glycol and 11-16% of polyethylene oxide;
the solvent comprises the following materials in proportion: 19-25% of tetrahydrofuran and 75-81% of dimethylformamide.
CN201510948772.2A 2015-12-17 2015-12-17 High-safety flexible package lithium ion battery core Active CN105390751B (en)

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Application Number Priority Date Filing Date Title
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CN105390751B true CN105390751B (en) 2023-10-10

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Publication number Priority date Publication date Assignee Title
CN105958008B (en) * 2016-06-30 2018-10-09 深圳博磊达新能源科技有限公司 A kind of lithium ion battery anode composite piece, preparation method and lithium ion battery
CN106099133A (en) * 2016-08-30 2016-11-09 惠州市惠德瑞锂电科技股份有限公司 A kind of lithium battery core body, preparation method and the lithium primary battery of gained
CN110137434A (en) * 2019-06-06 2019-08-16 深圳鸿鹏新能源科技有限公司 Lithium battery pole slice and preparation method thereof
CN114171780A (en) * 2021-11-30 2022-03-11 蜂巢能源科技有限公司 Lithium ion battery cell, preparation method and application thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385830A (en) * 1941-11-29 1945-10-02 Cons Mining & Smelting Co Mold and method for casting electrolytic cells
CN201252137Y (en) * 2008-09-05 2009-06-03 广东国光电子有限公司 Film polymer lithium ion battery
CN201918456U (en) * 2010-10-21 2011-08-03 力佳电源科技(深圳)有限公司 Lithium battery composite diaphragm and diaphragm bag
CN202601794U (en) * 2012-05-29 2012-12-12 深圳市博亿能科技有限公司 Novel bag type structure lithium ion battery
CN103094618A (en) * 2012-12-19 2013-05-08 天津市捷威动力工业有限公司 Bag-making type lithium ion battery and preparation method thereof
CN204741041U (en) * 2015-06-29 2015-11-04 中山市世豹新能源有限公司 Ultra high power system pocket type lamination lithium ion battery structure
CN205264818U (en) * 2015-12-17 2016-05-25 佛山市南海区欣源电子有限公司 High soft package lithium -ion battery core of security

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385830A (en) * 1941-11-29 1945-10-02 Cons Mining & Smelting Co Mold and method for casting electrolytic cells
CN201252137Y (en) * 2008-09-05 2009-06-03 广东国光电子有限公司 Film polymer lithium ion battery
CN201918456U (en) * 2010-10-21 2011-08-03 力佳电源科技(深圳)有限公司 Lithium battery composite diaphragm and diaphragm bag
CN202601794U (en) * 2012-05-29 2012-12-12 深圳市博亿能科技有限公司 Novel bag type structure lithium ion battery
CN103094618A (en) * 2012-12-19 2013-05-08 天津市捷威动力工业有限公司 Bag-making type lithium ion battery and preparation method thereof
CN204741041U (en) * 2015-06-29 2015-11-04 中山市世豹新能源有限公司 Ultra high power system pocket type lamination lithium ion battery structure
CN205264818U (en) * 2015-12-17 2016-05-25 佛山市南海区欣源电子有限公司 High soft package lithium -ion battery core of security

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Address after: 528000 Xiqiao science and Technology Industrial Park, Nanhai District, Guangdong, Foshan

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