CN106058083A - Laminate polymer battery shell and laminate polymer battery - Google Patents
Laminate polymer battery shell and laminate polymer battery Download PDFInfo
- Publication number
- CN106058083A CN106058083A CN201610689057.6A CN201610689057A CN106058083A CN 106058083 A CN106058083 A CN 106058083A CN 201610689057 A CN201610689057 A CN 201610689057A CN 106058083 A CN106058083 A CN 106058083A
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- Prior art keywords
- hot pressing
- layer
- seal
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- seal district
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application relates to the field of energy storage devices, in particular to a soft package battery shell and a soft package battery. Laminate polymer battery case includes two heat-seal membranes, two heat-seal membranes pile up and form the accommodation space that is used for holding naked electric core and by the outside hot banding that extends of accommodation space, every heat-seal membrane all has one deck hot-pressing layer, position on heat-seal limit, the hot-pressing layer laminating contact and the hot pressing connection of two heat-seal membranes, make the hot-seal limit by being close to one side of accommodation space to keeping away from one side of accommodation space be first direction, to the compression volume of two-layer hot-pressing layer hot pressing connection, the compression volume of following one side of first direction being close to accommodation space is less than the compression volume of keeping away from one side of accommodation space. Laminate polymer battery includes naked electric core and laminate polymer battery shell, and naked electric core is placed in accommodation space. The soft-package battery provided by the embodiment of the application can meet the strength requirement and the permeability requirement.
Description
Technical field
The application relates to energy storage device field, particularly relates to a kind of soft-package battery shell and soft-package battery.
Background technology
Soft-package battery is as shell, isolation air and moisture with heat-sealing film 10, makes battery reach an airtight independence
In extraneous space.Wherein heat-sealing film 10 is by up of three layers (as shown in Figure 1), is protective layer the most successively
100, metal foil layer 102 and hot pressing layer 104, is melted the pressing of two heat-sealing films 10, the hot pressing layer of internal layer by hot press during encapsulation
Changing and merge, now hot pressing layer 104 thickness by certain compression, and can make the edge of two heat-sealing films 10 form one
Circle hot edge seal 106, formed between two heat-sealing films 10 simultaneously one be heat-sealed limit 106 around and for accommodating the appearance of naked battery core
Receive space 108 (as shown in Figure 2,3).
Encapsulation process in correlation technique is typically all disposable hot pressing (seeing Fig. 4) in uniform thickness, hot pressing during hot pressing
The thickness of layer 104 can be compressed.If decrement is excessive, then heat-sealing after heat laminate layer 104 is relatively thin, and intensity is deteriorated, package reliability
It is deteriorated, the easy leakage of battery；And if decrement is the least, then hot pressing layer is thicker, and moisture easily penetrates into electricity from hot pressing layer 104
In receiving space 108 within pond (seeing Fig. 4), cause side reaction, reduce the life-span of battery, be difficult to find an equilibrium point.
Summary of the invention
This application provides a kind of soft-package battery shell and soft-package battery, it is possible to solve the problems referred to above.
The first aspect of the embodiment of the present application provides a kind of soft-package battery shell, including two heat-sealing films,
Two described heat-sealing films stack and formed the receiving space for accommodating naked battery core and by described receiving space to
The hot edge seal of outer extension, each described heat-sealing film has one layer of hot pressing layer, in described hot edge seal position, two described heat-sealing films
Described hot pressing laminating splice grafting touch and hot pressing connect,
Make described hot edge seal by the side near described receiving space to being first party away from the side in described receiving space
To, the decrement connected for hot pressing layer hot pressing described in two-layer, along described first direction in the side near described receiving space
Described decrement less than the described decrement of side away from described receiving space.
Preferably, along described first direction, described hot edge seal has the first seal district, Yi Jiao district and the second seal successively
District,
Hot pressing floor described in two-layer is positioned at the equal hot pressing of part in described first seal district and described second seal district and connects, and two
Floor described hot pressing floor is less than hot pressing floor described in two-layer in described second seal district in the decrement of the part in described first seal district
The decrement of part.
Preferably,
Hot pressing floor described in two-layer is 4～60 μm in the decrement of the part in described first seal district；
Hot pressing floor described in two-layer is 8～80 μm in the decrement of the part in described second seal district.
Preferably, in said first direction,
The size in described first seal district is 1～10mm,
The size 1～10mm in described second seal district,
The size in described Yi Jiao district is 0.2～2mm.
Preferably, along described first direction, described hot edge seal has internal seal district and outside seal district successively,
Hot pressing floor described in two-layer is positioned at the equal hot pressing of part in described internal seal district and described outside seal district and connects, and
Hot pressing floor described in two-layer is cumulative along described first direction in the decrement of the part in described internal seal district.
Preferably, hot pressing floor described in two-layer is in the decrement phase in said first direction of the part in described outside seal district
With.
Preferably, hot pressing floor described in two-layer exists with hot pressing floor described in two-layer in the decrement of the part in described outside seal district
The decrement of described internal seal district end section in said first direction is identical.
Preferably,
Hot pressing floor described in two-layer is 4～80 μm in the decrement of the part in described internal seal district；
Hot pressing floor described in two-layer is 8～80 μm in the decrement of the part in described outside seal district.
Preferably, in said first direction,
The size in described internal seal district is 1～10mm,
The size 1～12mm in described outside seal district.
Preferably, described hot pressing layer is PP layer.
Preferably, described heat-sealing film is aluminum plastic film or firm plastic film.
The second aspect of the embodiment of the present application provides a kind of soft-package battery, including naked battery core and described soft-package battery
Shell,
Described naked battery core is placed in described receiving space.
The technical scheme that the embodiment of the present application provides can reach following beneficial effect:
Soft-package battery shell that the embodiment of the present application is provided and soft-package battery by near accommodate the side in space with
Use different decrements away from the side accommodating space, make formed hot edge seal can either meet requirement of strength, again can
Meet tonicity requirements.
It should be appreciated that it is only exemplary that above general description and details hereinafter describe, can not be limited this
Application.
Accompanying drawing explanation
The cross section structure schematic diagram of the heat-sealing film that Fig. 1 is provided by the application background technology；
The perspective view of the soft-package battery that Fig. 2 is provided by the application background technology；
The main TV structure schematic diagram of the soft-package battery that Fig. 3 is provided by the application background technology；
Fig. 4 is the schematic cross-section of A-A part in Fig. 3；
The perspective view of the soft-package battery that Fig. 5 is provided by the embodiment of the present application；
The main TV structure schematic diagram of the soft-package battery that Fig. 6 is provided by the embodiment of the present application；
The soft-package battery B-B part in Figure 5 using the first hot edge seal structure that Fig. 7 is provided by the embodiment of the present application
Schematic cross-section；
The soft-package battery B-B part in Figure 5 using the second hot edge seal structure that Fig. 8 is provided by the embodiment of the present application
Schematic cross-section.
Reference:
10-heat-sealing film；
100-overcoat；
102-metal foil layer；
104-hot pressing layer；
106-hot edge seal；
106a-the first seal district；
106b-Yi Jiao district；
106c-the second seal district；
The internal seal district of 106d-；
The outside seal district of 106e-；
108-accommodates space.
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet the enforcement of the application
Example, and for explaining the principle of the application together with description.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing the application is described in further detail.Described in literary composition
"front", "rear", "left", "right", " on ", D score is all with the laying state of the soft-package battery shell in accompanying drawing and soft-package battery for ginseng
According to.
As shown in Fig. 5 to Fig. 8, the embodiment of the present application provides a kind of soft-package battery and includes soft-package battery shell and naked electricity
Core.Soft-package battery shell includes two heat-sealing films 10, for example with aluminum plastic film or steel plastic film.Generally, heat-sealing film 10
Including three-decker, it is followed successively by overcoat 100, metal foil layer 102 and hot pressing layer 104.Overcoat 100 is primarily used to form soft
The exterior protection of bag battery case, typically uses nylon material, different according to the kind of heat-sealing film 10, corresponding use aluminium foil layer or
Person's steel foil layer is protected for internal layer as metal foil layer 102, hot pressing layer 104, is also that two-layer heat-sealing film 10 carries out hot pressing envelope simultaneously
Dress forms articulamentum during soft-package battery shell, typically can use PP material.The heat-sealing film 10 of the most common better performances has
Aluminum plastic film, steel plastic film etc..
As shown in Figure 7 and Figure 8, formed during soft-package battery, first can shape on a heat-sealing film 10 wherein
Becoming a groove, the inwall of groove is made up of hot pressing layer 104, afterwards by hot pressing layer 104 stacked relative of two-layer heat-sealing film 10, and
Naked battery core being placed in groove, the lug of naked battery core is by the drop shadow spread stretching out heat-sealing film 10 between two heat-sealing films 10.Afterwards
The edge of hot pressing layer 104 is fit together and hot pressing connects, and irrigate electrolyte.After hot pressing connects, two heat-sealing films 10
Edge forms a circle hot edge seal 106, formed between two heat-sealing films 10 simultaneously one be heat-sealed limit 106 around and for accommodating
The receiving space 108 of naked battery core.
The hot edge seal 106 1 now formed has six Rotating fields, including being positioned at outermost two-layer overcoat 100, often
The inner side of layer overcoat 100 is layer of metal layers of foil 102 respectively, and middle is two-layer hot pressing layer 104.In order to meet intensity simultaneously
And the requirement of anti-permeability, the present embodiment is provided with different regions on hot edge seal 106, and the employing of each region is had difference
Other heat pressing process, thus possess different decrements.
In the present embodiment, make hot edge seal 106 near accommodating the side in space 108 to away from the side accommodating space 108
Direction be first direction.The analysis found that, when electrokinetic cell is by mechanical shock, or when internal flatulence air pressure increases,
Mastication forces between two-layer hot pressing layer 104 mainly from accommodating space 108, therefore, is leaned in the present embodiment in a first direction
The region of the nearly side accommodating space 108 uses less decrement (to be positioned at the hot pressing layer 104 in each region of hot edge seal 106 in heat
Thickness before pressure is identical；After hot pressing, on first direction, hot pressing layer 104 thickness near the side accommodating space 108 is more than
Hot pressing layer 104 thickness of side away from described receiving space 108), thus retain thicker hot pressing layer 104 and improve this side
Intensity, and then remain potted performance well, package reliability is high.And in a first direction relative to the less decrement of this employing
Region farther away from accommodate space 108 region in, then use bigger decrement, it is possible to distance accommodate space 108 relatively
Remote formation defence line, position, prevents moisture from being penetrated into receiving space 108 by hot edge seal 106, causes side reaction, reduce the longevity of battery
Life.Therefore, this structure can either preferably ensure the local strength of hot pressing layer 104, successfully manages from accommodating space 108
Mastication forces, on the other hand also is able to effectively prevent moisture from being penetrated into by hot pressing layer 104.
As it is shown in fig. 7, in one of them scheme of the present embodiment, hot edge seal 106 has the most successively
One seal district 106a, Yi Jiao district 106b and the second seal district 106c these three region.Wherein, two hot pressing layers 104 are positioned at
The equal hot pressing of part of one seal district 106a and the second seal district 106c connects, and two-layer hot pressing floor 104 is in the first seal district
The decrement of the part of 106a is less than the two-layer hot pressing floor 104 decrement in the part of the second seal district 106c, it is generally the case that
The thickness before not being hot pressed of hot pressing layer 104 maintains about 20～100 μm, and in hot pressing, hot pressing layer 104 is first
The compression ratio of the part in seal district 106a can reach 20%～60%, and decrement can reach 4～60 μm, namely thickness
Reduce 4～60 μm.Further, size in a first direction is in the range of 1～10mm.This decrement and size can bases
The thickness of naked battery core, size are adjusted, to meet required structural strength.And hot pressing floor 104 is in the second seal district 106c
The compression ratio of part be 40%～80%, decrement reaches 8～80 μm.In a first direction, the chi of the second seal district 106c
Very little can also be adjusted in the range of 1～10mm, to meet impermeable requirement.Thus strengthen two-layer hot pressing layer respectively
The local strength of 104 and impermeable ability, the size of the first seal district 106a and the second seal district 106c is preferably based on heat-sealing
The overall dimensions on limit 106 carries out Reasonable adjustment, any one oversize performance that all may have influence on another performance.
The part being positioned at Yi Jiao district 106b at two-layer hot pressing floor 104 is then in free state, does not the most carry out hot pressing,
The most just can store in hot pressing by the hot pressing floor in the first seal district 106a and the second seal district 106c by slot milling
104 melt a part of excess stock overflowed.Another part when first seal district 106a carries out hot pressing is many then to be assembled with material
In in the junction accommodating space 108 and hot edge seal 106.Now, first seal district 106a, Yi Jiao district 106b and the second seal district
The cross sectional shape that 106c is monolithically fabricated is similar to stepped.
Encapsulation process for hot edge seal 106 can two steps complete, and i.e. first completes the first seal district on a heat sealing machine
The heat-sealing of 106a, returns again to complete on another heat sealing machine the heat-sealing of the second seal district 106c；Can also a step complete, i.e. heat
The end socket of envelope machine is designed directly to the most stepped, and a hot pressing can complete encapsulation.
In another scheme of the present embodiment, hot edge seal 106 also can use another kind of structure, as shown in Figure 8, hot edge seal
106 have internal seal district 106d and outside seal district 106e the most successively, and two-layer hot pressing layer 104 is internally positioned
The equal hot pressing of part of seal district 106d and outside seal district 106e connects, and wherein, two-layer hot pressing floor 104 is in internal seal district
The decrement of the part of 106d is the most cumulative, and namely compression ratio and decrement are gradually increased, and hot pressing layer 104
Thickness be then gradually reduced.It also is able in this way make possess higher intensity in the region accommodating space 108, with
And move away from accommodating space 108, decrement is increasing, also therefore is able to make hot pressing layer 104 possess the highest antiseepage
Property thoroughly, meanwhile, the excess stock using this structure that internal seal district 106d can be made to produce in hot pressing concentrates on appearance
Receive the junction with hot edge seal 106, space 108.
For outside seal district 106e, its Main Function is to prevent moisture from penetrating into, it is therefore desirable to maintain bigger decrement.
Generally, in outside seal district 106e, the decrement of two-layer hot pressing layer is preferably maintained in identical, with letter in a first direction
Change heat pressing process.Further, it is also possible to make the decrement of internal seal district 106d end section in a first direction and outside envelope
District 106e is consistent for print, say, that outside seal district 106e by internal seal district 106d end in a first direction along
First direction extends, and makes total more smooth, complete.In hot pressing, hot pressing floor 104 is in internal seal district
The compression ratio of the part in 106d near accommodate space 108 side typically can as little as about 20%, compress in the first direction
Rate is gradually increased, and finally can reach about 80%, and keeps consistent with the compression ratio of outside seal district 106e.Additionally, internal envelope
Print district 106d size general control in a first direction is in the range of 1～10mm, and outside seal district 106e is in first party
Size upwards can be somewhat larger, and general control is in the range of 1～12mm.This decrement and size are equally according to naked
The thickness of battery core, size are adjusted, to meet required structural strength and anti-permeability requirement.
The soft-package battery that the embodiment of the present application is provided can either meet requirement of strength, disclosure satisfy that again tonicity requirements.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations, any modification, equivalent substitution and improvement made based on the application
Deng, within should be included in the protection domain of the application.
Claims (10)
1. a soft-package battery shell, it is characterised in that include two heat-sealing films,
Two described heat-sealing films stack and are formed for accommodating the receiving space of naked battery core and by described receiving space to extension
The hot edge seal stretched, each described heat-sealing film has one layer of hot pressing layer, in described hot edge seal position, the institute of two described heat-sealing films
State hot pressing laminating splice grafting to touch and hot pressing connection,
Make described hot edge seal by the side near described receiving space to being first direction away from the side in described receiving space, right
In the decrement that hot pressing layer hot pressing described in two-layer connects, along described first direction described in the side near described receiving space
Decrement is less than the described decrement of the side away from described receiving space.
2. soft-package battery shell as claimed in claim 1, it is characterised in that along described first direction, described hot edge seal is successively
There is the first seal district, Yi Jiao district and the second seal district,
Hot pressing floor described in two-layer is positioned at the equal hot pressing of part in described first seal district and described second seal district and connects, two-layer institute
State hot pressing floor and be less than hot pressing floor described in two-layer in the portion in described second seal district in the decrement of the part in described first seal district
The decrement divided.
3. soft-package battery shell as claimed in claim 2, it is characterised in that
Hot pressing floor described in two-layer is 4～60 μm in the decrement of the part in described first seal district；
Hot pressing floor described in two-layer is 8～80 μm in the decrement of the part in described second seal district.
4. soft-package battery shell as claimed in claim 2, it is characterised in that in said first direction,
The size in described first seal district is 1～10mm,
The size 1～10mm in described second seal district,
The size in described Yi Jiao district is 0.2～2mm.
5. soft-package battery shell as claimed in claim 1, it is characterised in that along described first direction, described hot edge seal is successively
There is internal seal district and outside seal district,
Hot pressing floor described in two-layer is positioned at the equal hot pressing of part in described internal seal district and described outside seal district and connects, and two-layer
Described hot pressing floor is cumulative along described first direction in the decrement of the part in described internal seal district.
6. soft-package battery shell as claimed in claim 5, it is characterised in that hot pressing floor described in two-layer is in described outside seal district
The decrement of part the most identical.
7. soft-package battery shell as claimed in claim 6, it is characterised in that hot pressing floor described in two-layer is in described outside seal district
Part decrement and two-layer described in hot pressing floor in the pressure of described internal seal district end section in said first direction
Contracting amount is identical.
8. soft-package battery shell as claimed in claim 5, it is characterised in that
Hot pressing floor described in two-layer is 4～80 μm in the decrement of the part in described internal seal district；
Hot pressing floor described in two-layer is 8～80 μm in the decrement of the part in described outside seal district.
9. soft-package battery shell as claimed in claim 5, it is characterised in that in said first direction,
The size in described internal seal district is 1～10mm,
The size 1～12mm in described outside seal district.
10. a soft-package battery, it is characterised in that include the soft-package battery described in naked battery core and any one of claim 1 to 9
Shell,
Described naked battery core is placed in described receiving space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689057.6A CN106058083A (en) | 2016-08-19 | 2016-08-19 | Laminate polymer battery shell and laminate polymer battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689057.6A CN106058083A (en) | 2016-08-19 | 2016-08-19 | Laminate polymer battery shell and laminate polymer battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106058083A true CN106058083A (en) | 2016-10-26 |
Family
ID=57195278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610689057.6A Pending CN106058083A (en) | 2016-08-19 | 2016-08-19 | Laminate polymer battery shell and laminate polymer battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN106058083A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486629A (en) * | 2016-12-14 | 2017-03-08 | 河北银隆新能源有限公司 | Soft-package battery |
| CN107195829A (en) * | 2017-07-05 | 2017-09-22 | 江西优特汽车技术有限公司 | The electrokinetic cell of new-energy automobile |
| WO2020125695A1 (en) * | 2018-12-18 | 2020-06-25 | 宁德新能源科技有限公司 | Cell and battery |
| CN111341946A (en) * | 2018-12-18 | 2020-06-26 | 宁德新能源科技有限公司 | Battery core and battery |
| CN113330628A (en) * | 2020-03-24 | 2021-08-31 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| US11121416B2 (en) | 2018-07-13 | 2021-09-14 | Ningde Amperex Technology Limited | Adsorption assembly and battery |
| CN114614174A (en) * | 2022-03-29 | 2022-06-10 | 东莞新能安科技有限公司 | Battery case, battery and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106486629A (en) * | 2016-12-14 | 2017-03-08 | 河北银隆新能源有限公司 | Soft-package battery |
| CN107195829A (en) * | 2017-07-05 | 2017-09-22 | 江西优特汽车技术有限公司 | The electrokinetic cell of new-energy automobile |
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| CN113330628A (en) * | 2020-03-24 | 2021-08-31 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| WO2021189265A1 (en) * | 2020-03-24 | 2021-09-30 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| EP4113645A4 (en) * | 2020-03-24 | 2023-10-18 | Dongguan Poweramp Technology Limited | Electrochemical device and electronic device |
| CN114614174A (en) * | 2022-03-29 | 2022-06-10 | 东莞新能安科技有限公司 | Battery case, battery and electronic device |
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