CN209029428U - A kind of etch-proof soft bag lithium ionic cell - Google Patents
A kind of etch-proof soft bag lithium ionic cell Download PDFInfo
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- CN209029428U CN209029428U CN201821856379.6U CN201821856379U CN209029428U CN 209029428 U CN209029428 U CN 209029428U CN 201821856379 U CN201821856379 U CN 201821856379U CN 209029428 U CN209029428 U CN 209029428U
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- Prior art keywords
- plastic film
- aluminum plastic
- pole piece
- positive terminal
- etch
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- 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
Abstract
The utility model belongs to technical field of lithium ion, more particularly to a kind of etch-proof soft bag lithium ionic cell, including battery core made of being wound or stacked as anode pole piece, diaphragm and cathode pole piece three, the positive terminal for being set to anode pole piece, it is set to the negative terminal of cathode pole piece and is wrapped in the aluminum plastic film of the battery core, the positive terminal is connected with the aluminum plastic film by conductive material or direct physical contact, and the aluminium layer of the aluminum plastic film is positively charged.Compared with the prior art, the utility model is by the way that anode is connected with aluminum plastic film, can not only prevent aluminum plastic film occur electrochemical corrosion, can also greatly improve soft-package battery production in there are the discriminations of the defective products battery of corrosion risk, to enhance the safety in utilization of lithium ion battery.
Description
Technical field
The utility model belongs to technical field of lithium ion more particularly to a kind of etch-proof soft bag lithium ionic cell.
Background technique
The features such as soft bag lithium ionic cell is high, safety is good, flexible design with its specific energy is led in consumer electronics product
Domain and electric car field are widely applied.
The outer packing of soft pack cell is aluminum plastic film, although can effectively reduce the weight of battery core using aluminum plastic film, is improved
The energy density of battery core, but aluminum plastic film also easily corrodes breakage, loses to the protective effect inside battery core.Aluminum plastic film is generally by outer
The nylon layer or pet layer in portion, intermediate aluminium layer and internal PP layer composition, internal PP layer played in encapsulation process bond with it is close
Envelope effect.PP layers during melting-solidification brittleness will increase, in process easily generate micro crack.Electrolyte can
These cracks are penetrated into directly to contact with aluminium layer generation, once the aluminium layer in aluminum plastic film and cathode have electronic loop generation, metallic aluminium
Layer will occur to insert lithium reaction, form the very high aluminium lithium alloy of brittleness to cause the internal corrosion of soft pack cell and eventually lead to aluminium
Layer ruptures, and loses the insulating effect to moisture.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, and provide a kind of etch-proof Soft Roll lithium ion
Battery can not only prevent aluminum plastic film from electrochemical corrosion occurs, and can also greatly improve and there is corrosion wind in soft-package battery production
The discrimination of the defective products battery of danger, to enhance the safety in utilization of lithium ion battery.
To achieve the goals above, the utility model uses following technical scheme:
A kind of etch-proof soft bag lithium ionic cell, including by anode pole piece, diaphragm and cathode pole piece three winding or heap
Battery core made of folded, the positive terminal for being set to anode pole piece are set to the negative terminal of cathode pole piece and are wrapped in described
The aluminum plastic film of battery core, the positive terminal are connected with the aluminum plastic film by conductive material or direct physical contact, the plastic-aluminum
The aluminium layer of film is positively charged.
It should be noted that lithium ion can occur under low potential for lithium ion is embedded into formation lithium aluminium conjunction in aluminum metal lattice
Gold, and the aluminum plastic film of the utility model is positively charged, therefore, aluminum plastic film can be constantly in higher current potential without corroding.
In addition, if generation negative electrode tab/negative terminal is contacted with aluminum plastic film or micro- contact phenomena, phase in battery manufacturing process
When foring circuit in positive electrode and negative electrode, the self discharge of battery can be amplified, can be quick in subsequent self discharge detection process
Efficiently choose such defective products battery core, enhances the security reliability of battery.
Preferably, it is connected between the positive terminal and the aluminum plastic film by coating conducting resinl.Conducting resinl is flowing
, it can achieve the effect that aluminum plastic film and positive terminal conducting by penetrating on the aluminium layer of aluminum plastic film.
Preferably, the aluminum plastic film is provided with conductive protruding portion.Protruding portion can be the exposed aluminum plastic film of aluminium layer, can also
To be other external conductive materials, and the conductive material can be connected with the aluminium layer of aluminum plastic film.
Preferably, the positive terminal is connect and is connected by conductive gummed paper with the protruding portion.That is, positive terminal
Son is connected with the aluminium layer of aluminum plastic film by conductive gummed paper, and the aluminium layer of aluminum plastic film is positively charged.
Preferably, the positive terminal and the protruding portion are connected by welding.By welding so that positive terminal with
The aluminium layer direct physical contact of aluminum plastic film, the aluminium layer of aluminum plastic film are positively charged.
Preferably, the positive terminal and the protruding portion are connected by riveting.By riveting so that positive terminal with
The aluminium layer direct physical contact of aluminum plastic film, the aluminium layer of aluminum plastic film are positively charged.
Preferably, the contact resistance of the positive terminal and the aluminum plastic film is 0 ~ 1000 Ω.Positive terminal and aluminum plastic film
With certain contact resistance, the aluminium layer for being conducive to aluminum plastic film keeps higher current potential.
Preferably, the contact resistance of the positive terminal and the aluminum plastic film is 250 ~ 750 Ω.
Preferably, the outermost layer of the battery core is anode pole piece.Outermost layer is anode, cathode contact can be prevented to plastic-aluminum
Film, if the internal layer PP protective layer of aluminum plastic film has breakage, if cathode touches damage location, it may occur that corrosion, and outermost layer
For anode pole piece, even if anode pole piece touches damage location, corrosion will not occur.
The utility model has the beneficial effects that: the utility model provides a kind of etch-proof soft bag lithium ionic cell, packet
Include as anode pole piece, diaphragm and cathode pole piece three wind or stack made of battery core, be set to anode pole piece positive terminal,
It is set to the negative terminal of cathode pole piece and is wrapped in the aluminum plastic film of the battery core, the positive terminal and the aluminum plastic film are logical
It crosses conductive material or direct physical contact conducting, the aluminium layer of the aluminum plastic film is positively charged.Compared with the prior art, the utility model
By the way that anode is connected with aluminum plastic film, it can not only prevent aluminum plastic film from electrochemical corrosion occurs, can also greatly improve soft
There are the discriminations of the defective products battery of corrosion risk in packet battery production, thus enhance lithium ion battery using safe
Property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1.
Fig. 2 is the structural schematic diagram of embodiment 2.
Fig. 3 is the structural schematic diagram of embodiment 3.
Fig. 4 is the structural schematic diagram of embodiment 4.
Wherein: 1- battery core, 2- aluminum plastic film, 3- positive terminal, 4- negative terminal, 5- conducting resinl, 6- protruding portion, 7- conducting resinl
Paper, the welding section 8-, 9- rivet area.
Specific embodiment
With reference to embodiment and Figure of description, the utility model is described in further detail, but this
The embodiment of utility model is not limited to this.
Embodiment 1
As shown in Figure 1, a kind of etch-proof soft bag lithium ionic cell, including by anode pole piece, diaphragm and cathode pole piece three
Person winding or stack made of battery core 1, be set to anode pole piece positive terminal 3, be set to the negative terminal 4 of cathode pole piece with
And it is wrapped in the aluminum plastic film 2 of battery core；It is connected between positive terminal 3 and aluminum plastic film 4 by coating conducting resinl 5, the aluminium of aluminum plastic film 3
Layer is positively charged.The contact resistance of positive terminal 3 and aluminum plastic film 2 is 0 ~ 1000 Ω, preferably 250 ~ 750 Ω.The outermost layer of battery core 1
For anode pole piece.
Embodiment 2
As shown in Fig. 2, a kind of etch-proof soft bag lithium ionic cell, including by anode pole piece, diaphragm and cathode pole piece three
Person winding or stack made of battery core 1, be set to anode pole piece positive terminal 3, be set to the negative terminal 4 of cathode pole piece with
And it is wrapped in the aluminum plastic film 2 of battery core；Aluminum plastic film 2 is provided with conductive protruding portion 6, and positive terminal 3 and protruding portion 6 pass through conducting resinl
Paper 7 is connected and is connected, and the aluminium layer of aluminum plastic film 2 is positively charged.The contact resistance of positive terminal 3 and aluminum plastic film 2 is 0 ~ 1000 Ω, preferably
For 250 ~ 750 Ω.The outermost layer of battery core 1 is anode pole piece.
Embodiment 3
As shown in figure 3, a kind of etch-proof soft bag lithium ionic cell, including by anode pole piece, diaphragm and cathode pole piece three
Person winding or stack made of battery core 1, be set to anode pole piece positive terminal 3, be set to the negative terminal 4 of cathode pole piece with
And it is wrapped in the aluminum plastic film 2 of the battery core；Aluminum plastic film 2 is provided with conductive protruding portion 6, and positive terminal 3 and protruding portion 6 pass through weldering
It connects and is connected, the aluminium layer of aluminum plastic film 2 is positively charged.The contact resistance of positive terminal 3 and aluminum plastic film 2 is 0 ~ 1000 Ω, preferably 250
~750Ω.The outermost layer of battery core 1 is anode pole piece.
Embodiment 4
As shown in figure 4, a kind of etch-proof soft bag lithium ionic cell, including by anode pole piece, diaphragm and cathode pole piece three
Person winding or stack made of battery core, be set to anode pole piece positive terminal 3, be set to cathode pole piece negative terminal and
It is wrapped in the aluminum plastic film 2 of battery core；Aluminum plastic film 2 is provided with conductive protruding portion 6, and positive terminal 3 is led with protruding portion 6 by riveting
Logical, the aluminium layer of aluminum plastic film 2 is positively charged.The contact resistance of positive terminal 3 and aluminum plastic film 2 is 0 ~ 1000 Ω, preferably 250 ~ 750
Ω.The outermost layer of battery core is anode pole piece.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (9)
1. a kind of etch-proof soft bag lithium ionic cell, it is characterised in that: including by anode pole piece, diaphragm and cathode pole piece three
Battery core made of winding or stacking, the positive terminal for being set to anode pole piece, the negative terminal and packet for being set to cathode pole piece
It is wrapped in the aluminum plastic film of the battery core, the positive terminal is connected with the aluminum plastic film by conductive material or direct physical contact,
The aluminium layer of the aluminum plastic film is positively charged.
2. etch-proof soft bag lithium ionic cell according to claim 1, it is characterised in that: the positive terminal with it is described
It is connected between aluminum plastic film by coating conducting resinl.
3. etch-proof soft bag lithium ionic cell according to claim 1, it is characterised in that: the aluminum plastic film, which is provided with, leads
The protruding portion of electricity.
4. etch-proof soft bag lithium ionic cell according to claim 3, it is characterised in that: the positive terminal with it is described
Protruding portion passes through conductive gummed paper and connects and be connected.
5. etch-proof soft bag lithium ionic cell according to claim 3, it is characterised in that: the positive terminal with it is described
Protruding portion is connected by welding.
6. etch-proof soft bag lithium ionic cell according to claim 3, it is characterised in that: the positive terminal with it is described
Protruding portion is connected by riveting.
7. described in any item etch-proof soft bag lithium ionic cells according to claim 1 ~ 6, it is characterised in that: the positive terminal
The sub contact resistance with the aluminum plastic film is 0 ~ 1000 Ω.
8. etch-proof soft bag lithium ionic cell according to claim 7, it is characterised in that: the positive terminal with it is described
The contact resistance of aluminum plastic film is 250 ~ 750 Ω.
9. described in any item etch-proof soft bag lithium ionic cells according to claim 1 ~ 6, it is characterised in that: the battery core
Outermost layer is anode pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821856379.6U CN209029428U (en) | 2018-11-12 | 2018-11-12 | A kind of etch-proof soft bag lithium ionic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821856379.6U CN209029428U (en) | 2018-11-12 | 2018-11-12 | A kind of etch-proof soft bag lithium ionic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209029428U true CN209029428U (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821856379.6U Active CN209029428U (en) | 2018-11-12 | 2018-11-12 | A kind of etch-proof soft bag lithium ionic cell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851792A (en) * | 2021-10-25 | 2021-12-28 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN113871808A (en) * | 2021-10-25 | 2021-12-31 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN114035112A (en) * | 2021-11-09 | 2022-02-11 | 新纶新能源材料(常州)有限公司 | Soft package lithium ion battery and online detection method for negative short circuit thereof |
| CN114696019A (en) * | 2020-12-25 | 2022-07-01 | 丰田自动车株式会社 | Battery module |
-
2018
- 2018-11-12 CN CN201821856379.6U patent/CN209029428U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114696019A (en) * | 2020-12-25 | 2022-07-01 | 丰田自动车株式会社 | Battery module |
| CN113851792A (en) * | 2021-10-25 | 2021-12-28 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN113871808A (en) * | 2021-10-25 | 2021-12-31 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN113871808B (en) * | 2021-10-25 | 2024-03-26 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery and electronic device |
| CN114035112A (en) * | 2021-11-09 | 2022-02-11 | 新纶新能源材料(常州)有限公司 | Soft package lithium ion battery and online detection method for negative short circuit thereof |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220120 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 523000 Dalang Town, Dongguan, Guangdong province Xiangshan Pine Hill Village Xiangshan Industrial Park Jiayuan Road No. 9 Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |