CN210778688U - Soft packet of lithium cell packaging structure - Google Patents
Soft packet of lithium cell packaging structure Download PDFInfo
- Publication number
- CN210778688U CN210778688U CN201921953308.2U CN201921953308U CN210778688U CN 210778688 U CN210778688 U CN 210778688U CN 201921953308 U CN201921953308 U CN 201921953308U CN 210778688 U CN210778688 U CN 210778688U
- Authority
- CN
- China
- Prior art keywords
- banding
- packaging structure
- soft
- pressure relief
- lithium cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 44
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000002844 melting Methods 0.000 claims abstract description 14
- 230000008018 melting Effects 0.000 claims abstract description 14
- 239000012785 packaging film Substances 0.000 claims abstract description 14
- 229920006280 packaging film Polymers 0.000 claims abstract description 14
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 239000002985 plastic film Substances 0.000 claims description 15
- 229920006255 plastic film Polymers 0.000 claims description 15
- 238000005538 encapsulation Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 5
- 229910001416 lithium ion Inorganic materials 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000005025 cast polypropylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a soft packet of lithium cell packaging structure, including two-layer packaging film, be equipped with the chamber of acceping that is used for holding electricity core between the two-layer packaging film, just the edge of two-layer packaging film overlaps and fuses into through hot pressing and be used for sealing the banding of acceping the chamber, the banding includes first banding and is used for the second banding of explosion-proof, the melting point of second banding is less than the melting point of first banding. The beneficial effects of the utility model reside in that: set up the lower second banding of melting point on the banding for the second banding can become soft packet of lithium cell's directional pressure release position, and the explosion-proof performance that not only can effectual improvement soft packet of lithium cell also conveniently collects the battery inner material of unusual soft packet of lithium cell because of explosion-proof release, can effectively improve soft packet of lithium cell's security performance.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of batteries, especially, relate to a soft packet of lithium cell packaging structure.
[ background of the invention ]
The lithium ion battery has the characteristics of large capacity, good cycle performance and environmental protection, and is widely applied to various aspects such as medical treatment, communication, traffic and the like, particularly the vigorous advocation of environmental traffic, and the electric vehicle adopting the lithium ion battery as power has become a mainstream trend. Lithium ion battery divide into the cylinder lithium cell according to structural feature, square lithium cell and soft packet of lithium cell, wherein soft packet of lithium cell is because of light in weight, the characteristics that energy density ratio is big have obtained rapid development, in prior art, soft packet of lithium cell adopts the solvent of carbonic ester as electrolyte usually, with the capacity and the cycle life of improvement battery, however the flash point of carbonic ester is lower, and soft packet of lithium cell takes place to cross to fill or can release a large amount of gases and heat when putting or violent striking, make soft packet of lithium cell produce the problem of flatulence, can produce the incident of explosion even when serious.
In view of the above, it is desirable to provide a soft package lithium battery package structure to overcome the above-mentioned drawbacks.
[ Utility model ] content
The utility model aims at providing a soft packet of lithium cell packaging structure aims at improving the explosion-proof performance of soft packet of lithium cell, improves the security performance of soft packet of lithium cell.
In order to realize the above-mentioned purpose, the utility model provides a soft packet of lithium cell packaging structure, including two-layer packaging film, be equipped with the chamber of acceping that is used for holding electric core between the two-layer packaging film, just the edge of two-layer packaging film overlaps and fuses into through hot pressing and is used for sealing accept the banding in chamber, the banding includes first banding and is used for explosion-proof second banding, the melting point of second banding is less than the melting point of first banding.
In a preferred embodiment, the outer side of the second sealing edge extends to form a pressure relief portion, and the pressure relief portion is provided with a pressure relief hole for releasing pressure.
In a preferred embodiment, a pressure relief valve is embedded in the pressure relief hole.
In a preferred embodiment, the pressure relief valve is further provided with a balloon which can be expanded under pressure.
In a preferred embodiment, the edge of each packaging film for forming the second sealing edge is provided with an extension part, and the two extension parts are fused by hot pressing to form the pressure relief part.
In a preferred embodiment, a pair of tabs electrically connected to the battery cell and used as a positive electrode and a negative electrode respectively is further disposed between the two layers of encapsulation films.
In a preferred embodiment, the pair of tabs and the second sealing edge are respectively arranged on two sides of the accommodating cavity.
In a preferred embodiment, the two layers of edge-overlapped packaging films are formed by folding a rectangular piece of aluminum-plastic film in half.
In a preferred embodiment, one end of the aluminum-plastic film is provided with a groove formed by stamping, and the groove is closed to form the accommodating cavity after the aluminum-plastic film is folded in half.
The utility model also provides a soft packet of lithium cell including above-mentioned soft packet of lithium cell packaging structure.
The utility model discloses a set up the lower second banding of melting point on the banding for the second banding can become soft packet of lithium cell's directional pressure release position, and the explosion-proof performance that not only can effectual improvement soft packet of lithium cell also conveniently collects the battery inside material of unusual soft packet of lithium cell because of explosion-proof release, can effectively improve soft packet of lithium cell's security performance.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
Fig. 1 is a front view of a half-section of a soft package lithium battery packaging structure provided by the present invention;
fig. 2 is a front view of the aluminum plastic film shown in fig. 1 before being folded in half to form two packaging films.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.
Please refer to fig. 1 and 2, the utility model provides a soft packet of lithium battery packaging structure 100 and use this soft packet of lithium battery packaging structure 100's soft packet of lithium battery, mainly solve the explosion-proof problem of soft packet of lithium battery.
The embodiment of the utility model provides an in, soft packet of lithium battery packaging structure 100 includes two-layer encapsulation membrane 10, be equipped with the chamber 101 that accepts that is used for holding electric core between the two-layer encapsulation membrane 10, the edge of two-layer encapsulation membrane 10 overlaps and fuses into the banding 102 that is used for closing the chamber 101 through hot pressing, it is further, banding 102 includes first banding 1021 and the second banding 1022 that links to each other with first banding 1021, and the melting point of second banding 1022 is less than the melting point of first banding 1021 in order to be used for the pressure release explosion-proof, it is concrete, can lead to the inside temperature of battery and pressure all sharply to improve when the electricity core of soft packet of lithium battery takes place unusually, second banding 1022 can preferentially melt because of the melting point is lower this moment, make second banding 1022 can become the export of release battery internal pressure, thereby can effectively avoid soft packet of lithium battery to produce the danger of explosion.
In this embodiment, the two-layer sealing film 10 is formed by folding a rectangular aluminum-plastic film 200 in half, and one end of the aluminum-plastic film 200 is provided with a groove 2001 formed by stamping and used for accommodating the battery cell, that is, the groove 2001 is closed after the aluminum-plastic film 200 is folded in half to form an accommodating cavity 101 for accommodating the battery cell, meanwhile, edges of the aluminum-plastic film 200 are folded in half to form an overlap, and then edges of the aluminum-plastic film 200 overlapped are hot-pressed to form a sealing edge 102 for closing the accommodating cavity 101, specifically, a fused layer (not shown) is provided on one side of the aluminum-plastic film 200 overlapped with each other, the fused layer may be made of CPP (cast polypropylene) to facilitate hot-pressing fusion to form the sealing edge 102, and a position of the fused layer for forming the second sealing edge is modified to form an area with a lower melting point, so as to achieve a purpose that the melting point 1022 of the second sealing edge is lower than the melting.
Further, in an embodiment, a pair of tabs 103 electrically connected to the battery core and serving as positive and negative electrodes are further disposed between the two layers of packaging films 10, it can be understood that the pair of tabs 103 is embedded in the sealing edge 102 when the sealing edge 102 is formed by hot pressing so as to be electrically connected to other batteries or components, and preferably, in order to prevent the battery or the component electrically connected to the pair of tabs 103 from being contaminated by the battery internal substance sprayed from the second sealing edge 1022 when the battery is abnormal, the pair of tabs 103 and the second sealing edge 1022 are disposed on two sides of the receiving cavity 101, that is, the pair of tabs 103 and the second sealing edge 1022 are disposed on two sides of the corresponding battery, respectively.
It should be noted here that when the abnormal soft package lithium battery releases pressure through the second sealing edge 1022, substances inside the battery can be sprayed to the outside through the second sealing edge 1022 while releasing the pressure, and the sprayed substances inside the battery not only have a higher temperature, but also contain combustible and corrosive chemical substances such as electrolyte, and therefore the substances inside the battery can damage the battery or components after polluting the battery or the components, and even cause a greater fire.
Further, in an embodiment, in order to make things convenient for second banding 1022 to split back release pressure, one side that the chamber 101 was held away from to second banding 1022 is equipped with pressure relief portion 1023, and pressure relief portion 1023 offers the pressure release hole 1024 that is used for release pressure, that is, second banding 1022 splits back through pressure release hole 1024 and external intercommunication, so make second banding 1022 possess directional pressure release's effect, can control the injection direction of the inside material of battery through pressure release hole 1024 promptly, make follow the pressure release and the inside material of battery that jets out can convenient and fast collect the isolation, can prevent effectively that the inside material of battery that jets out from damaging other batteries or the components and parts that link to each other with the battery, can be in order to avoid unusual batteries to arouse bigger adverse chain reaction.
In the present embodiment, the pressure relief portion 1023 is also formed by thermocompression bonding, specifically, each edge of the packaging film 10 is provided with an extension portion 1025, and two extension portions 1025 correspond to each other and form the pressure relief portion 1023 by thermocompression bonding, that is, two extension portions 1025 are respectively disposed at two ends of the aluminum plastic film 200 and overlapped with each other after the aluminum plastic film 200 is folded in half for forming the pressure relief portion 1023. Preferably, in order to prevent the generation of stress concentration, the junction of the pressure relief portion 1023 and the second sealing edge 1022 is in a circular arc transition, that is, the junction of each extension 1025 and the corresponding encapsulation film 10 is in a circular arc transition.
Further, in an embodiment, in order to prevent the second sealing edge 1022 from generating an undesirable problem of air leakage or liquid leakage, a pressure release valve 20 is further embedded in the pressure release hole 1024 of the second sealing edge 1022, so as to achieve the purpose of preventing air leakage or liquid leakage. Optionally, a gas bag (not shown) is disposed in the pressure relief valve 20, and the gas bag can be expanded under pressure and is used for collecting the substance sprayed from the pressure relief valve 20, that is, the gas bag can be used for collecting the substance inside the battery sprayed from the pressure relief valve 20 and preventing the substance from contacting oxygen in the air, so as to further prevent fire safety accidents.
The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a soft packet of lithium cell packaging structure, a serial communication port, including two-layer encapsulation membrane, be equipped with the chamber of acceping that is used for holding electric core between the two-layer encapsulation membrane, just the edge of two-layer encapsulation membrane overlaps and fuses into through the hot-pressing and is used for sealing the banding of acceping the chamber, the banding includes first banding and is used for the blast proof second banding, the melting point of second banding is less than the melting point of first banding.
2. The soft package lithium battery packaging structure of claim 1, wherein the outer side of the second sealing edge extends to form a pressure relief portion, and the pressure relief portion is provided with a pressure relief hole for releasing pressure.
3. The soft-package lithium battery packaging structure of claim 2, wherein a pressure relief valve is embedded in the pressure relief hole.
4. The soft-package lithium battery packaging structure according to claim 3, wherein the pressure relief valve is further provided with an air bag capable of being expanded under pressure.
5. The soft-package lithium battery packaging structure of claim 2, wherein the edge of each packaging film for forming the second sealing edge is provided with an extension part, and the two extension parts are fused by hot pressing to form the pressure relief part.
6. The soft-package lithium battery packaging structure of claim 1, wherein a pair of tabs electrically connected to the battery cell and used as a positive electrode and a negative electrode are further disposed between the two layers of packaging films.
7. The soft-package lithium battery packaging structure according to claim 6, wherein the pair of tabs and the second sealing edge are respectively disposed at two sides of the accommodating cavity.
8. The soft-package lithium battery packaging structure according to claim 1, wherein the two layers of packaging films with overlapped edges are formed by folding a rectangular aluminum-plastic film in half.
9. The soft package lithium battery packaging structure of claim 8, wherein a groove formed by punching is formed at one end of the aluminum-plastic film, and the groove is sealed to form the accommodating cavity after the aluminum-plastic film is folded.
10. A lithium-ion battery pack, comprising the lithium-ion battery pack packaging structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953308.2U CN210778688U (en) | 2019-11-12 | 2019-11-12 | Soft packet of lithium cell packaging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953308.2U CN210778688U (en) | 2019-11-12 | 2019-11-12 | Soft packet of lithium cell packaging structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210778688U true CN210778688U (en) | 2020-06-16 |
Family
ID=71045879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921953308.2U Expired - Fee Related CN210778688U (en) | 2019-11-12 | 2019-11-12 | Soft packet of lithium cell packaging structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210778688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113013545A (en) * | 2021-03-01 | 2021-06-22 | 苏州清陶新能源科技有限公司 | Laminate polymer battery and battery module |
| CN116093504A (en) * | 2023-04-10 | 2023-05-09 | 宁德新能源科技有限公司 | Electrochemical device and electric equipment |
-
2019
- 2019-11-12 CN CN201921953308.2U patent/CN210778688U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113013545A (en) * | 2021-03-01 | 2021-06-22 | 苏州清陶新能源科技有限公司 | Laminate polymer battery and battery module |
| CN113013545B (en) * | 2021-03-01 | 2023-10-27 | 苏州清陶新能源科技有限公司 | Soft package battery and battery module |
| CN116093504A (en) * | 2023-04-10 | 2023-05-09 | 宁德新能源科技有限公司 | Electrochemical device and electric equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |