CN105390751A - High security soft package lithium ion battery core and manufacture method thereof - Google Patents

High security soft package lithium ion battery core and manufacture method thereof Download PDF

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Publication number
CN105390751A
CN105390751A CN201510948772.2A CN201510948772A CN105390751A CN 105390751 A CN105390751 A CN 105390751A CN 201510948772 A CN201510948772 A CN 201510948772A CN 105390751 A CN105390751 A CN 105390751A
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CN
China
Prior art keywords
pole
lithium ion
plate
battery core
negative pole
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Application number
CN201510948772.2A
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Chinese (zh)
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CN105390751B (en
Inventor
薛永
谢志懋
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Foshan City Xinyuan Electronics Co ltd
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Guangdong Xinyuan Intelligent Electronics Co ltd
FOSHAN NANHAI XINYUAN ELECTRONICS Co Ltd
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Priority to CN201510948772.2A priority Critical patent/CN105390751B/en
Publication of CN105390751A publication Critical patent/CN105390751A/en
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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 relates to a high security soft package lithium ion battery core and a manufacture method thereof, belonging to the field of battery manufacture. The invention particularly relates to the field of manufacture of lithium ion batteries. The lithium ion battery core is characterized in that a bag type negative pole plate is internally provided with a negative pole plate, a diaphragm bag wraps outside the negative pole plate, the top of the negative pole plate is provided with a negative pole nickel pole lug, the lower part of the negative pole nickel pole lug is coated with negative pole lug glue, the top of a positive pole plate is provided with a positive pole aluminum pole lug, the lower part of the positive pole aluminum pole lug is coated with positive pole plug glue, the bag type negative pole plate and the positive pole plate are crossed and overlaid by many layers, the first layer and the last layer are bag type negative pole plates, and the positive pole aluminum pole lug and the negative pole nickel pole lug are at the same side of the battery core. Through adoption of the lithium ion battery core, the security performance and product percent of pass of the lithium ion batteries can be improved, and short circuit caused by temperature rising due to abnormal conditions like overcharging, collision, falling and so on is prevented.

Description

Flexible packing lithium ion battery core that a kind of fail safe is high and preparation method thereof
Technical field
The present invention relates to field of cell preparation, be specifically related to lithium ion battery preparation field.
Background technology
At present, the production method of lithium ion battery mainly contains winding-structure and lamination, and stack type lithium ion battery is simple with its preparation technology, the low favor being subject to people of cost of manufacture, and becomes the major way of current lithium ion battery making.And current laminated battery plate mainly stacks gradually making by negative pole, barrier film, positive pole, but the shortcoming such as short circuit that it exists that qualification rate is low, poor product quality and dust thereof cause.
Summary of the invention
The invention discloses high flexible packing lithium ion battery core of a kind of fail safe and preparation method thereof, not only can the security performance improving lithium ion battery and products thereof qualification rate, avoid overshoot, clash into, fall abnormal condition and to heat up the short circuit problem caused.
The invention provides high flexible packing lithium ion battery core of a kind of fail safe and preparation method thereof, include: pocket type negative plate 1 and positive plate 2, pocket type negative plate 1 inside is provided with negative plate 12, negative plate 12 be surrounded by diaphragm bag 13, negative plate 12 top is provided with negative pole nickel lug 11, the lower part of negative pole nickel lug 11 is coated with negative electrode lug gluing 14, described positive plate 2 top is provided with positive pole aluminium pole ears 21, positive pole aluminium pole ears 21 lower part is coated with anode ear gluing 23, described pocket type negative plate 1 and positive plate 2 juxtaposition multilayer, wherein ground floor and last one deck are all pocket type negative plates 1, positive pole aluminium pole ears 21 and negative pole nickel lug 11 are positioned at the homonymy of battery core.
The material of described diaphragm bag 13 is ceramic diaphragm, and described ceramic diaphragm is formed by following material mixture ratio: aluminium oxide 1 ~ 5%, lithium compound 0.1 ~ 1%, binding agent 1 ~ 20%, solvent 80 ~ 95%;
The particle diameter of described aluminium oxide is 0.1 ~ 10 μm;
The material mixture ratio of described lithium compound is: Li 5la 3ta 2o 1210 ~ 15%, Li 5la 3nb 2o 1220 ~ 25%, Li 6baLa 2ta 2o 1245 ~ 68%, Li 6mgLa 2ta 2o 1210 ~ 20%;
The material mixture ratio of described binding agent is: polyacrylamide 5 ~ 15%, polyvinyl alcohol 50 ~ 65%, polyethylene glycol 2 ~ 25%, polyethylene glycol oxide 11 ~ 16%;
The material mixture ratio of described solvent is: oxolane 19 ~ 25%, dimethyl formamide 75 ~ 81%.
The present invention adopts bag formula lamination process, can prevent cathode pole piece dust from falling and cause battery short circuit at positive electrode surface, improve its security performance; Meanwhile, cathode pole piece bag can prevent barrier film under contraction situation, causing battery short circuit.
The uncoated district of both positive and negative polarity pole piece and nickel lug/aluminium pole ears apply tab and can prevent battery in an abnormal situation, and anode pole piece contacts with cathode pole piece and causes battery short circuit, and improves the security performance of its lithium ion battery.
Ceramic diaphragm protection core of lithium ion cell in overshoot, clash into, the abnormal condition such as to fall under cause temperature to become large instantaneously, ceramic diaphragm then has the characteristics such as high temperature resistant, heat dispersion is excellent, improves the security performance of its battery.
Accompanying drawing explanation
Fig. 1 is pocket type negative plate schematic diagram of the present invention.
Fig. 2 is positive plate schematic diagram of the present invention.
Fig. 3 is pocket type negative plate of the present invention and positive plate lamination schematic diagram.
Symbol description in Fig. 1-3: pocket type negative plate 1, negative pole nickel lug 11, negative plate 12, diaphragm bag 13, negative electrode lug gluing 14, positive plate 2, aluminium pole ears 21, anode ear gluing 23.
Embodiment
As Figure 1-3, flexible packing lithium ion battery core that a kind of fail safe is high and preparation method thereof, pocket type negative plate 1 and positive plate 2, pocket type negative plate 1 inside is provided with negative plate 12, negative plate 12 be surrounded by diaphragm bag 13, negative plate 12 top is provided with negative pole nickel lug 11, the lower part of negative pole nickel lug 11 is coated with negative electrode lug gluing 14, described positive plate 2 top is provided with positive pole aluminium pole ears 21, positive pole aluminium pole ears 21 lower part is coated with anode ear gluing 23, described pocket type negative plate 1 and positive plate 2 juxtaposition multilayer, wherein ground floor and last one deck are all pocket type negative plates 1, positive pole aluminium pole ears 21 and negative pole nickel lug 11 are positioned at the homonymy of battery core.
The lamination number that pocket type negative plate is conventional has 13 layers, 31 layers, 41 layers, corresponding positive plate 12 layers, 30 layers, 40 layers.
The material of described diaphragm bag 13 is ceramic diaphragm, and described ceramic diaphragm is formed by following material mixture ratio: aluminium oxide 3.3%, lithium compound 0.7%, binding agent 12%, solvent 84%;
The particle diameter of described aluminium oxide is 0.1 ~ 10 μm;
The material mixture ratio of described lithium compound is: Li 5la 3ta 2o 1212%, Li 5la 3nb 2o 1222%, Li 6baLa 2ta 2o 1250%, Li 6mgLa 2ta 2o 1216%;
The material mixture ratio of described binding agent is: polyacrylamide 8%, polyvinyl alcohol 58%, polyethylene glycol 21%, polyethylene glycol oxide 13%;
The material mixture ratio of described solvent is: oxolane 22%, dimethyl formamide 78%.
The Performance comparision of the present invention and traditional battery core:
Implementation method DC internal resistance Safety loading coefficient
Pocket type negative plate 31 layers and positive plate 30 layers 0.23 mΩ 9/10
Pocket type negative plate 13 layers and positive plate 12 layers 0.56 mΩ 8/10
Pocket type negative plate 41 layers and positive plate 40 layers 0.11 mΩ 8/10
The stacked battery core of tradition 0.39 mΩ 4/10
The present invention adopts bag formula lamination process, is obviously better than traditional stacked battery core in security performance, can prevent cathode pole piece dust from falling and cause battery short circuit at positive electrode surface, improve its security performance; Meanwhile, cathode pole piece bag can prevent barrier film under contraction situation, causing battery short circuit.
The uncoated district of both positive and negative polarity pole piece and nickel lug/aluminium pole ears apply tab and can prevent battery in an abnormal situation, and anode pole piece contacts with cathode pole piece and causes battery short circuit, and improves the security performance of its lithium ion battery.
Ceramic diaphragm protection core of lithium ion cell in overshoot, clash into, the abnormal condition such as to fall under cause temperature to become large instantaneously, ceramic diaphragm then has the characteristics such as high temperature resistant, heat dispersion is excellent, improves the security performance of its battery.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.

Claims (2)

1. flexible packing lithium ion battery core that a fail safe is high and preparation method thereof, include: pocket type negative plate (1) and positive plate (2), it is characterized in that: described pocket type negative plate (1) inside is provided with negative plate (12), negative plate (12) be surrounded by diaphragm bag (13), negative plate (12) top is provided with negative pole nickel lug (11), the lower part of negative pole nickel lug (11) is coated with negative electrode lug gluing (14), described positive plate (2) top is provided with positive pole aluminium pole ears (21), positive pole aluminium pole ears (21) lower part is coated with anode ear gluing (23), described pocket type negative plate (1) and positive plate (2) juxtaposition multilayer, wherein ground floor and last one deck are all pocket type negative plate (1), positive pole aluminium pole ears (21) and negative pole nickel lug (11) are positioned at the homonymy of battery core.
2. flexible packing lithium ion battery core that a kind of fail safe as claimed in claim 1 is high and preparation method thereof, it is characterized in that: the material of described diaphragm bag (13) is ceramic diaphragm, and described ceramic diaphragm is formed by following material mixture ratio: aluminium oxide 1 ~ 5%, lithium compound 0.1 ~ 1%, binding agent 1 ~ 20%, solvent 80 ~ 95%;
The particle diameter of described aluminium oxide is 0.1 ~ 10 μm;
The material mixture ratio of described lithium compound is: Li 5la 3ta 2o 1210 ~ 15%, Li 5la 3nb 2o 1220 ~ 25%, Li 6baLa 2ta 2o 1245 ~ 68%, Li 6mgLa 2ta 2o 1210 ~ 20%;
The material mixture ratio of described binding agent is: polyacrylamide 5 ~ 15%, polyvinyl alcohol 50 ~ 65%, polyethylene glycol 2 ~ 25%, polyethylene glycol oxide 11 ~ 16%;
The material mixture ratio of described solvent is: oxolane 19 ~ 25%, dimethyl formamide 75 ~ 81%.
CN201510948772.2A 2015-12-17 2015-12-17 High-safety flexible package lithium ion battery core Active CN105390751B (en)

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CN105390751B CN105390751B (en) 2023-10-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958008A (en) * 2016-06-30 2016-09-21 深圳博磊达新能源科技有限公司 Composite positive electrode plate of lithium ion battery, preparation method thereof 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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958008A (en) * 2016-06-30 2016-09-21 深圳博磊达新能源科技有限公司 Composite positive electrode plate of lithium ion battery, preparation method thereof and lithium ion battery
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

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

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