CN209461494U - Laminate polymer battery with multiple buffer band structure - Google Patents
Laminate polymer battery with multiple buffer band structure Download PDFInfo
- Publication number
- CN209461494U CN209461494U CN201822239798.1U CN201822239798U CN209461494U CN 209461494 U CN209461494 U CN 209461494U CN 201822239798 U CN201822239798 U CN 201822239798U CN 209461494 U CN209461494 U CN 209461494U
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- CN
- China
- Prior art keywords
- battery
- width
- main body
- multiple buffer
- heat
- 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.)
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- 229920000642 polymer Polymers 0.000 title abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000002985 plastic film Substances 0.000 claims description 6
- 229920006255 plastic film Polymers 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 20
- 238000003860 storage Methods 0.000 abstract description 7
- 230000003139 buffering effect Effects 0.000 abstract description 6
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 230000001351 cycling effect Effects 0.000 abstract description 2
- 238000007086 side reaction Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910013716 LiNi Inorganic materials 0.000 description 1
- 229910011624 LiNi0.7Co0.1Mn0.2O2 Inorganic materials 0.000 description 1
- 229910015872 LiNi0.8Co0.1Mn0.1O2 Inorganic materials 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum ion Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000007600 charging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- YVUZUKYBUMROPQ-UHFFFAOYSA-N mercury zinc Chemical compound [Zn].[Hg] YVUZUKYBUMROPQ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a laminate polymer battery with multiple buffering band structure belongs to laminate polymer battery technical field. The soft package battery comprises a battery cell and a plastic package shell, wherein the plastic package shell is provided with a main body for accommodating the battery cell and a packaging edge positioned on the side of the main body, the packaging edge is provided with multiple buffer belt sections formed by alternately arranging heat sealing areas and spacing areas parallel to the side edge of the battery cell, the number of the heat sealing areas is N, and the number of the spacing areas is N-1,N which is more than or equal to 2. The utility model discloses a multiple buffering area structural design, both can ensure the leakproofness of battery, can realize that part encapsulation district opens when the battery physiosis reaches certain degree again, and the gas that the storage battery side reaction produced effectively alleviates the battery micro short circuit that the battery bloated causes, promotes the storage performance and the cycling performance of battery; meanwhile, the internal short circuit of the battery when the battery is seriously swelled can be effectively relieved, thermal runaway is avoided, the overcharge safety performance of the battery is improved, and safety accidents are reduced.
Description
Technical Field
The utility model relates to a laminate polymer battery technical field, concretely relates to laminate polymer battery with multiple buffering band structure.
Background
The soft-package battery is widely applied to the fields of smart phones, mobile power supplies, new energy vehicles and the like because of the advantages of light battery weight, high energy density, convenience in forming and the like, and particularly, the market share of the soft-package battery is rapidly increased along with the explosive growth of the new energy vehicle market. The large-scale popularization of new energy automobiles is always restricted by the problem of insufficient driving range of automobiles, a power battery with high energy density is needed, and a soft package battery is favored by the market due to high energy density.
On soft-package batteries, the trend of designing lithium ion batteries is to reduce or compress unnecessary volume waste as much as possible in the aspect of design, generally, soft packages need to be packaged in the manufacturing process, and certain requirements can be made on the packaging width for ensuring the strength of the sealing edge.
CN 207038562U discloses a soft package battery, which comprises a battery core and a package shell. The packaging shell is provided with a main body for accommodating the battery core and a side sealing edge positioned on the side of the main body. Wherein, the side banding has: a base extending horizontally from a side of the main body; and a folding portion connected to the base portion, folded back and folded onto the base portion. Because the basal portion directly extends horizontally from the side face of the main body, the damage of the connecting part of the basal portion and the side face of the main body is avoided, and the safety and reliability of the soft package battery are improved. Meanwhile, the folded part of the side edge seal is folded back and folded on the base part, so that the width of the side edge seal is reduced, and the energy density of the soft package battery is improved.
At present, the main way for improving the energy density of the battery in the industry is to adopt a ternary material system, in particular a high-nickel ternary material (LiNi) 0.6 Co 0.2 Mn 0.2 O 2 、LiNi 0.7 Co 0.1 Mn 0.2 O 2 、LiNi 0.8 Co 0.1 Mn 0.1 O 2 Etc.), while the ternary material system is easy to generate gas during the long-term storage and charging and discharging processes of the battery, and is easy to cause the swelling phenomenon of the battery, especially a soft package battery, thereby causing the problems of the electrochemical performance attenuation, potential safety hazard and the like of the battery; at present, the industry mainly improves through material system optimization, but the improvement is obviously not enough from the viewpoint of material system optimization, and the improvement needs to be optimized from the viewpoint of cell structural design.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can alleviate battery bulging, reduce interior short circuit, improve electrochemical performance and security performance's laminate polymer battery.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a soft package battery with a multiple buffer belt structure comprises a battery cell and a plastic package shell, wherein the plastic package shell is provided with a main body for accommodating the battery cell and a packaging edge positioned on the side of the main body, the packaging edge is provided with multiple buffer belt sections formed by alternately arranging heat sealing areas and spacing areas parallel to the side edge of the battery cell, the number of the heat sealing areas is N, and the number of the spacing areas is N-1,N which is more than or equal to 2.
The seal structure of plastic envelope shell is realized by plastic-aluminum membrane heat-seal technology, the utility model discloses adopt the mode of interval heat-seal to make the encapsulation limit form multiple buffering area at the heat-seal in-process. The heat-seal district form for two-layer plastic-aluminum membrane heat-seal back, the interval does not carry out the heat-seal.
When the battery generates gas in the using process, the main body part of the plastic package shell expands to a certain degree, the upper layer and the lower layer of the aluminum-plastic film of the packaging edge, which are closest to the first heavy heat sealing area of the main body, are separated, the main body part is communicated with the first heavy interval area, the storage space of the gas is increased, and the internal short circuit caused by the gas expansion of the soft package battery is avoided; the seal structure of laminate polymer battery has still been guaranteed in the heavy heat-seal district of second simultaneously, analogizes in proper order, consequently, the utility model discloses an improvement is showing life cycle and the overcharge security performance that promotes laminate polymer battery.
Preferably, the plastic package casing takes the end where the battery cell tab is located as the top edge, and one or more packaging edges of the top edge, the side edge and the bottom edge of the plastic package casing are provided with multiple buffer belt sections.
Preferably, the width of the package edge is 1/20-1/3 of the width of the main body.
Preferably, the width of the heat-seal lands is 0.1 to 100mm, and the width of the spacer lands is 0.1 to 100mm. The utility model discloses according to battery unidimensional and performance not, the width and the distribution proportion in heat-seal district in the rational design buffering area.
Preferably, the width of the heat-seal land remote from the main body is greater than the width of the heat-seal land adjacent to the main body. The width of the heat-seal area on the buffer belt can be designed in a mode that the width gradually increases from the position close to the main body to the position far away from the main body, and when the main body expands, the heat-seal area close to the main body is easy to separate to provide an expansion space for gas storage.
Preferably, the width of the spacer region is less than or equal to the width of the heat seal region adjacent and distal to the body.
Specifically, for example, a side edge with a main body width of 161mm, 3 heat-seal regions and 2 spacers may be provided, wherein the widths of the 3 heat-seal regions from the cell main body to the outside are 2mm, 3mm and 4mm, respectively, and the widths of the 2 spacers from the cell main body to the outside are 3mm and 4mm, respectively.
Preferably, the plastic package shell is made of an aluminum plastic film material with the thickness of 50-300 μm.
The soft package battery can be any one of secondary batteries such as a lithium ion battery, a sodium ion battery and an aluminum ion battery, or any one of primary batteries such as a zinc-manganese battery, a zinc-silver battery and a zinc-mercury battery.
The battery cell is formed by laminating or winding a positive plate, a negative plate and a diaphragm, and two or more tabs of the battery cell are positioned at the same side or two sides of the battery cell.
Compared with the prior art, the utility model discloses the beneficial effect who possesses:
the utility model discloses a multiple buffering area structural design, both can ensure the leakproofness of battery, can realize that part encapsulation district opens when the battery physiosis reaches certain degree again, and the gas that the storage battery side reaction produced effectively alleviates the battery micro short circuit that the battery bloated causes, promotes the storage performance and the cycling performance of battery; meanwhile, the internal short circuit of the battery when the battery is seriously swelled can be effectively relieved, thermal runaway is avoided, the overcharge safety performance of the battery is improved, and safety accidents are reduced.
Drawings
Fig. 1 is a schematic view of a pouch battery in example 1.
Fig. 2 isbase:Sub>A schematic cross-sectional viewbase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a schematic diagram of the pouch cell of example 2.
Fig. 4 is a schematic view of a pouch battery in example 3.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
As shown in fig. 1-2, the pouch battery provided in this embodiment includes a battery cell, a tab 1 and a housing, the battery cell is formed by laminating a positive plate, a negative plate and a diaphragm, the tab 1 is located at the same side of the battery cell, a sealing structure of the housing is implemented by a heat-sealing process using an aluminum plastic film, and has a main body 2 for accommodating the battery cell and a sealing edge 3 located at a side of the main body, wherein the sealing edges at the side and the bottom side have multiple buffer tape sections formed by alternately arranging a heat-sealing area and a spacer area parallel to the side of the battery cell, and the buffer tape is formed by a double heat-sealing area and a double spacer area. The heat sealing area is formed after two layers of aluminum plastic films are subjected to heat sealing, and the interval area is not subjected to heat sealing.
Specifically, the side edge spacer 312 is located between the side edge first-stage heat-seal region 311 and the side edge second-stage heat-seal region 313, the packaging width of the side edge first-stage heat-seal region 311 is 1mm, the packaging width of the side edge second-stage heat-seal region 313 is 3mm, and the width of the side edge spacer 312 is 3mm;
the bottom edge spacing area 322 is positioned between the bottom edge I section heat-sealing area 321 and the bottom edge II section heat-sealing area 323, the packaging width of the bottom edge I section heat-sealing area 321 is 1mm, the packaging width of the bottom edge II section heat-sealing area 323 is 2mm, and the packaging width of the bottom edge spacing area 322 is 2mm.
Example 2
As shown in fig. 3, the difference between this embodiment and embodiment 1 is that the tab of the pouch cell is located at both ends, the packaging width of the side edge i-segment heat-seal zone 311 is 2mm, the packaging width of the side edge ii-segment heat-seal zone 313 is 4mm, and the width of the side edge spacer zone 312 is 4mm.
Example 3
As shown in fig. 4, the pouch battery provided in this embodiment includes a battery cell, a tab 1 and a housing 1, the battery cell is formed by laminating a positive plate, a negative plate and a diaphragm, the tab 1 is located at the same side of the battery cell, a sealing structure of the housing is implemented by an aluminum plastic film through a heat sealing process, and has a main body 2 for accommodating the battery cell and a sealing edge 3 located at a side of the main body, wherein the sealing edges at the top, side and bottom edges all have multiple buffer tape sections formed by alternately arranging a heat sealing area and a spacer area parallel to the side of the battery cell, and the buffer tape is formed by a double heat sealing area and a double gap area.
Specifically, top edge spacer 332 is located between top edge stage I heat seal 331 and top edge stage II heat seal 333, with top edge stage I heat seal 331 having a package width of 2mm, top edge stage II heat seal 333 having a package width of 10mm, and top edge spacer 332 having a width of 2mm.
The side edge spacing area 312 is positioned between the side edge I section heat-sealing area 311 and the side edge II section heat-sealing area 313, the packaging width of the side edge I section heat-sealing area 311 is 1.5mm, the packaging width of the side edge II section heat-sealing area 313 is 4.5mm, and the width of the side edge spacing area 312 is 4mm.
The bottom edge spacing area 322 is positioned between the bottom edge I section heat-sealing area 321 and the bottom edge II section heat-sealing area 323, the packaging width of the bottom edge I section heat-sealing area 321 is 1mm, the packaging width of the bottom edge II section heat-sealing area 323 is 2mm, and the packaging width of the bottom edge spacing area 322 is 2mm.
Comparative example 1
The comparative example differs from example 1 in that the package edge of the pouch cell does not have a multiple buffer tape structure.
The overcharge performance of the soft package battery is tested, the soft package battery provided by the comparative example generates swelling and bursting when being charged to 5.0V, and the soft package battery provided by the example 1 and provided with the multiple buffer belt structure generates swelling and does not burst when being charged to 5.0V.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included within the protection scope of the present invention.
Claims (8)
1. The soft package battery with the multiple buffer belt structures comprises an electric core and a plastic package shell, wherein the plastic package shell is provided with a main body for accommodating the electric core and a package edge positioned on the side of the main body, and is characterized in that the package edge is provided with multiple buffer belt sections formed by alternately arranging heat sealing areas and spacing areas parallel to the side edge of the electric core, the number of the heat sealing areas is N, and the number of the spacing areas is N-1,N which is not less than 2.
2. The pouch cell with multiple buffer tape structure as claimed in claim 1, wherein the plastic casing has a top side with the end of the cell tab, and multiple buffer tape segments are disposed on one of the top side, the side edge, the bottom side, or multiple package edges.
3. The pouch cell with multiple buffer tape structure according to claim 1, wherein the width of the sealing edge is 1/20-1/3 of the width of the main body.
4. The pouch cell having a multiple buffer tape structure according to claim 1, wherein the width of the heat-seal land is 0.1 to 100mm, and the width of the spacer land is 0.1 to 100mm.
5. The pouch cell with multiple buffer tape structure of claim 4, wherein the width of the heat-seal land away from the main body is greater than the width of the heat-seal land adjacent to the main body.
6. The pouch cell having a multiple buffer tape structure according to claim 5, wherein the width of the spacer region is less than or equal to the width of the heat-seal region adjacent and distant from the main body.
7. The pouch battery with multiple buffer tape structure as claimed in claim 1, wherein the plastic package casing is made of aluminum plastic film with thickness of 50-300 μm.
8. The laminate battery with multiple buffer tape structures as claimed in claim 1, wherein the battery cell is formed by laminating or winding a positive plate, a negative plate and a separator, and two or more tabs of the battery cell are located on the same side or both sides of the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822239798.1U CN209461494U (en) | 2018-12-28 | 2018-12-28 | Laminate polymer battery with multiple buffer band structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822239798.1U CN209461494U (en) | 2018-12-28 | 2018-12-28 | Laminate polymer battery with multiple buffer band structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209461494U true CN209461494U (en) | 2019-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822239798.1U Active CN209461494U (en) | 2018-12-28 | 2018-12-28 | Laminate polymer battery with multiple buffer band structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209461494U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021108994A1 (en) * | 2019-12-03 | 2021-06-10 | 宁德时代新能源科技股份有限公司 | Secondary battery and device containing same |
| CN113764717A (en) * | 2021-09-01 | 2021-12-07 | 天津市捷威动力工业有限公司 | Method for improving durability of soft package battery, soft package battery and vehicle |
-
2018
- 2018-12-28 CN CN201822239798.1U patent/CN209461494U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021108994A1 (en) * | 2019-12-03 | 2021-06-10 | 宁德时代新能源科技股份有限公司 | Secondary battery and device containing same |
| CN113764717A (en) * | 2021-09-01 | 2021-12-07 | 天津市捷威动力工业有限公司 | Method for improving durability of soft package battery, soft package battery and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 313100, No. 18, Qiao Qiao Road, Changxing County painting industrial park, Zhejiang, Huzhou Patentee after: Tianneng Shuai Fude Energy Co.,Ltd. Address before: 313100, No. 18, Qiao Qiao Road, Changxing County painting industrial park, Zhejiang, Huzhou Patentee before: ZHEJIANG TIANNENG ENERGY TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 313100 No.18, Baoqiao Road, Huaxi Industrial Park, Changxing County, Huzhou City, Zhejiang Province Patentee after: Zhejiang Tianneng Energy Storage Technology Development Co.,Ltd. Country or region after: China Address before: 313100 No.18, Baoqiao Road, Huaxi Industrial Park, Changxing County, Huzhou City, Zhejiang Province Patentee before: Tianneng Shuai Fude Energy Co.,Ltd. Country or region before: China |