CN109346775A - Seal structure for lithium battery and lithium battery - Google Patents
Seal structure for lithium battery and lithium battery Download PDFInfo
- Publication number
- CN109346775A CN109346775A CN201811258663.8A CN201811258663A CN109346775A CN 109346775 A CN109346775 A CN 109346775A CN 201811258663 A CN201811258663 A CN 201811258663A CN 109346775 A CN109346775 A CN 109346775A
- Authority
- CN
- China
- Prior art keywords
- nut cap
- shell
- lithium battery
- edge
- seal structure
- 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.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 51
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/183—Sealing members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention relates to lithium battery processing and manufacturing technology, a kind of seal structure for lithium battery and lithium battery are provided.Seal structure for lithium battery, including shell and nut cap, the nut cap is set to the open end of the shell, the edge of the nut cap is folded upward at along the vertical direction, sealing shroud, the edge of the nut cap, the side wall of the shell and the double rolling sealing connection of the sealing shroud are equipped between the edge of the nut cap and the side wall of the shell；Lithium battery, including seal structure for lithium battery, the shell is interior to be equipped with battery roll core, and the negative electrode lug of the battery roll core is connect with the closed end of the shell, and the anode ear of the battery roll core is connect with the nut cap.By the way that sealing shroud is arranged between nut cap and housing sidewall contact surface, it is sealed using double rolling, lengthen nut cap and housing seal distance, further enhance sealing effect, guarantee being fully sealed for battery sealing structure, lithium battery leakage is prevented, the qualification rate and quality of lithium battery are improved, is guaranteed using safe.
Description
Technical field
The present invention relates to lithium battery processing and manufacturing technologies, more particularly to a kind of seal structure for lithium battery and lithium electricity
Pond.
Background technique
Currently, develop the development trend that new-energy automobile has become automobile manufacture, the drive of new-energy automobile in China
Under, lithium electricity industry rapidly develops, and power battery key technology is increasingly mature.Steel shell cylindrical lithium battery is in electrocar, electricity
It is widely applied on the products such as dynamic motorcycle, electric bicycle, solar energy, communication terminal product and energy storage.
The enclosuring structure of existing steel shell lithium battery not can guarantee the leakproofness of cylindrical lithium battery, and there are the risks of leakage.?
In production process, each leakage battery is bad products, reduces the production efficiency and quality of Battery Plant；In use,
Leakage battery can corrode electric appliance used, the immeasurable harm such as cause the premium of electric appliance, or even will cause explosion, fire.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide a kind of seal structure for lithium battery and lithium batteries, to solve existing enclosuring structure sealing effect
The problem of fruit is poor, leads to lithium battery leakage.
(2) technical solution
It is described in order to solve the above technical problem, the present invention provides a kind of seal structure for lithium battery, including shell and nut cap
Nut cap is set to the open end of the shell, and the edge of the nut cap is folded upward at along the vertical direction, the side of the nut cap after bending
The end face on edge is higher than the end face of the open end of the shell, and sealing is equipped between the edge of the nut cap and the side wall of the shell
Set, the bottom face of the sealing shroud is concordant with the bottom face of the nut cap, the side of the top end face of the sealing shroud and the nut cap
The end face on edge is concordant, the edge of the nut cap, the side wall of the shell and the double rolling sealing connection of the sealing shroud.
Wherein, after bending the edge of the nut cap end face lower than the shell open end end face, the nut cap
Sealing shroud is equipped between edge and the side wall of the shell, the bottom face of the sealing shroud is concordant with the bottom face of the nut cap,
The top end face of the sealing shroud is concordant with the end face of the open end of the shell.
Wherein, the surfaces externally and internally of the sealing shroud is coated with viscose glue.
Wherein, the nut cap includes that boss cap, envelope tabletting and concave station support, the boss cap are located at the upper of the envelope tabletting
Side, the concave station support are arranged in the downside of the envelope tabletting, and the edge correspondence of the edge of the boss cap and the concave station support is set
It sets, and is welded with the envelope tabletting.Wherein, the inside of the envelope tabletting and the boss cap weld is equipped with slot, described
The recessed groove Laser Welding with the concave station support in middle part of envelope tabletting is connect.
Wherein, the material of the shell is aluminium or iron or other metals.
Wherein, the material of the nut cap is conductive metal.
Wherein, the material of the sealing shroud is polypropylene.
The present invention also provides a kind of lithium batteries, including the seal structure for lithium battery as described in any of the above item, the shell
Interior to be equipped with battery roll core, the negative electrode lug of the battery roll core is connect with the closed end of the shell, the anode of the battery roll core
Ear is connect with the nut cap.
Wherein, the closed end of the negative electrode lug of the battery roll core and the shell is welded, the anode ear of the battery roll core
It is welded with the nut cap.
(3) beneficial effect
A kind of seal structure for lithium battery and lithium battery provided by the invention, by between nut cap and housing sidewall contact surface
Sealing shroud is set, is sealed using double rolling, lengthens nut cap and housing seal distance, further enhances sealing effect, is guaranteed
Battery sealing structure is fully sealed, and prevents lithium battery leakage, improves the qualification rate and quality of lithium battery, guarantees using peace
Entirely.
Detailed description of the invention
Fig. 1 is the cross-sectional view of one seal structure for lithium battery of the embodiment of the present invention；
Fig. 2 is the enlarged diagram of part B in Fig. 1；
Fig. 3 is the cross-sectional view of two seal structure for lithium battery of the embodiment of the present invention；
Fig. 4 is the enlarged diagram of part A in Fig. 3.
In figure, 1: shell；2: nut cap；3: sealing shroud；4: battery roll core.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In addition, in the description of the present invention, unless otherwise indicated, " multiple ", " more ", " multiple groups " be meant that two or
Two or more, " several ", " several ", " several groups " are meant that one or more.
Embodiment 1:
As depicted in figs. 1 and 2, the embodiment of the present invention provides a kind of seal structure for lithium battery, including shell 1 and nut cap 2, lid
Cap 2 is set to the open end of shell 1, and nut cap 2 and shell 1 form sealed chamber.The edge of nut cap 2 is folded upward at along the vertical direction,
The end face at the edge of nut cap 2 is higher than the end face of the open end of shell 1 after bending, and the edge after the bending of nut cap 2 is interior with shell 1
Wall fitting.
Wherein, the material of nut cap 2 is metal with good conductivity, preferably stainless steel.Nut cap 2 includes boss cap, envelope tabletting
With concave station support, boss cap is located at the upside of envelope tabletting, and the downside of envelope tabletting, the edge and concave station of boss cap is arranged in concave station support
The edge of support is correspondingly arranged, and is welded with envelope tabletting.The material of boss cap is iron nickel plating, and the material for sealing tabletting and concave station support is equal
For aluminium.
Wherein, the inside of envelope tabletting and boss cap weld is equipped with slot, is vented to pressure release.The middle part for sealing tabletting is recessed
Connect with the groove Laser Welding of concave station support, when cell internal pressure becomes larger, the recessed portion for sealing tabletting is popped up, envelope tabletting with it is recessed
The separation of platform support, realizes the function of power-off；When pressure continues to increase, the work of the pressure release exhaust explosion of nut cap 2 is realized in fracture at slot
With.
Wherein, shell 1 be bottom end closure open upper end open column shape structure, material be iron or other metals, preferably
Iron.The size of shell 1 can be specifically arranged according to actual needs.Insulating materials is wrapped up on the outside of shell 1, is guaranteed using safe.
Further, sealing shroud 3, the bottom face and lid of sealing shroud 3 are equipped between the side wall at the edge and shell 1 of nut cap 2
The bottom face of cap 2 is concordant, and the top end face of sealing shroud 3 is concordant with the end face at the edge of nut cap 2, increases between nut cap 2 and shell 1
Effective seal distance, guarantee sealing effect.The surfaces externally and internally of sealing shroud 3 is coated with viscose glue, enhances sealing effect.Sealing shroud 3
Material be polypropylene, have good flexibility and ductility, long service life.
Wherein, the side wall at the edge, shell 1 of nut cap 2 and the double rolling sealing connection together of sealing shroud 3.Specifically, nut cap
2 edge portions for being higher by shell 1 bend downward rolling outward, and the side wall of shell 1 is made to be located at the edge of nut cap 2 bent up and down
Between, by position of the nut cap 2 in conjunction with 1 rolling of shell outside rolling again, realize the complete sealing of nut cap 2 and shell 1, process
In, sealing shroud 3 is deformed in company with bending, be ensure that the overall tightness of lithium battery, is prevented leakage.
Embodiment 2:
The present embodiment is substantially the same manner as Example 1, brief for description, during the description of the present embodiment, no longer
Technical characteristic same as Example 1 is described, only illustrates the present embodiment difference from Example 1:
As shown in Figure 3 and Figure 4, after bending the edge of nut cap 2 end face lower than shell 1 open end end face, sealing shroud 3
Bottom face it is concordant with the bottom face of nut cap 2, the top end face of sealing shroud 3 is concordant with the end face of the open end of shell 1.By shell 1
The edge for being higher by nut cap 2 the inside rolling in part, be located at the edge of nut cap 2 between the side wall of shell 1, by nut cap 2 and shell
The position inside rolling again that 1 rolling of body combines, realizes the complete sealing of nut cap 2 and shell 1, in the process, sealing shroud 3 is in company with curved
Sell off shape.
The embodiment of the present invention also provides a kind of lithium battery, including the lithium battery as described in above embodiments 1 or embodiment 2
Enclosuring structure, shell 1 is interior to be equipped with battery roll core 4, and the negative electrode lug of battery roll core 4 is connect with the closed end of shell 1, battery roll core 4
Anode ear connect with nut cap 2.
In one example, the closed end of the negative electrode lug of battery roll core 4 and shell 1 is welded, the anode ear of battery roll core 4 with
Nut cap 2 is welded, and is guaranteed to be powered in good situation, is improved bonding strength.
A kind of seal structure for lithium battery and lithium battery provided by the invention, by between nut cap and housing sidewall contact surface
Sealing shroud is set, is sealed using double rolling, lengthens nut cap and housing seal distance, further enhances sealing effect, is guaranteed
Battery sealing structure is fully sealed, and prevents lithium battery leakage, improves the qualification rate and quality of lithium battery, guarantees using peace
Entirely.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of seal structure for lithium battery, which is characterized in that including shell and nut cap, the nut cap is set to the opening of the shell
End, the edge of the nut cap are folded upward at along the vertical direction, and the end face at the edge of the nut cap is higher than the shell after bending
The end face of open end is equipped with sealing shroud, the bottom face of the sealing shroud between the edge of the nut cap and the side wall of the shell
Concordant with the bottom face of the nut cap, the top end face of the sealing shroud is concordant with the end face at the edge of the nut cap, the nut cap
Edge, the shell side wall and the sealing shroud double rolling sealing connection.
2. seal structure for lithium battery as described in claim 1, which is characterized in that the end face at the edge of the nut cap is low after bending
Sealing shroud is equipped between the end face of the open end of the shell, the edge of the nut cap and the side wall of the shell, it is described close
The bottom face of big envelope is concordant with the bottom face of the nut cap, the end face of the open end of the top end face of the sealing shroud and the shell
Concordantly.
3. seal structure for lithium battery as described in claim 1, which is characterized in that the surfaces externally and internally of the sealing shroud is coated with viscous
Glue.
4. seal structure for lithium battery as described in claim 1, which is characterized in that the nut cap include boss cap, envelope tabletting and
Concave station support, the boss cap are located at the upside of the envelope tabletting, and the downside of the envelope tabletting is arranged in the concave station support, described
The edge of boss cap and the edge of the concave station support are correspondingly arranged, and are welded with the envelope tabletting.
5. seal structure for lithium battery as claimed in claim 4, which is characterized in that the envelope tabletting and the boss cap weld
Inside be equipped with slot, the recessed groove Laser Welding with the concave station support in the middle part of the envelope tabletting connect.
6. seal structure for lithium battery as described in claim 1, which is characterized in that the material of the shell be aluminium or iron or other
Metal.
7. seal structure for lithium battery as described in claim 1, which is characterized in that the material of the nut cap is conductive metal.
8. seal structure for lithium battery as described in claim 1, which is characterized in that the material of the sealing shroud is polypropylene.
9. a kind of lithium battery, which is characterized in that described including such as described in any item seal structure for lithium battery of claim 1-8
Battery roll core is equipped in shell, the negative electrode lug of the battery roll core is connect with the closed end of the shell, the battery roll core
Anode ear is connect with the nut cap.
10. lithium battery as claimed in claim 9, which is characterized in that the envelope of the negative electrode lug of the battery roll core and the shell
Closed end welding, the anode ear of the battery roll core and the nut cap are welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258663.8A CN109346775A (en) | 2018-10-26 | 2018-10-26 | Seal structure for lithium battery and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258663.8A CN109346775A (en) | 2018-10-26 | 2018-10-26 | Seal structure for lithium battery and lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109346775A true CN109346775A (en) | 2019-02-15 |
Family
ID=65312261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811258663.8A Pending CN109346775A (en) | 2018-10-26 | 2018-10-26 | Seal structure for lithium battery and lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109346775A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725532A (en) * | 2021-08-25 | 2021-11-30 | 远景动力技术(江苏)有限公司 | Battery cover plate, battery and battery processing method |
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| JPH1140115A (en) * | 1997-07-18 | 1999-02-12 | Japan Storage Battery Co Ltd | Cell and battery using the cell |
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| JP2006324059A (en) * | 2005-05-17 | 2006-11-30 | Toyo Seikan Kaisha Ltd | Container for square battery |
| JP2010027411A (en) * | 2008-07-21 | 2010-02-04 | Toyota Motor Corp | Sealed battery |
| CN201910464U (en) * | 2010-12-13 | 2011-07-27 | 深圳市创明电池技术有限公司 | Lithium battery capable of preventing liquid leakage and liquid seepage |
| CN201918444U (en) * | 2010-06-10 | 2011-08-03 | 芜湖根源科技有限公司 | Explosion-proof cap of power-type lithium ion battery |
| CN102332601A (en) * | 2010-12-21 | 2012-01-25 | 东莞新能源科技有限公司 | Cylindrical lithium ion battery |
| CN205488385U (en) * | 2016-04-01 | 2016-08-17 | 秦皇岛市芯驰光电科技有限公司 | Explosion -proof lithium cell structure of high magnification |
| CN107195807A (en) * | 2017-06-06 | 2017-09-22 | 惠州亿纬锂能股份有限公司 | Chargeable miniature lithium ion battery with hard shell structure and preparation method |
| CN206976402U (en) * | 2017-06-28 | 2018-02-06 | 中航锂电（江苏）有限公司 | A kind of novel metal casing lithium battery |
| CN209088005U (en) * | 2018-10-26 | 2019-07-09 | 大连中比动力电池有限公司 | Seal structure for lithium battery and lithium battery |
-
2018
- 2018-10-26 CN CN201811258663.8A patent/CN109346775A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08222196A (en) * | 1995-02-14 | 1996-08-30 | Sony Corp | Secondary battery |
| JPH1140115A (en) * | 1997-07-18 | 1999-02-12 | Japan Storage Battery Co Ltd | Cell and battery using the cell |
| JP2002124219A (en) * | 2000-10-13 | 2002-04-26 | Matsushita Electric Ind Co Ltd | Flat square battery |
| CN1645644A (en) * | 2000-10-13 | 2005-07-27 | 松下电器产业株式会社 | Flat square battery |
| JP2006324059A (en) * | 2005-05-17 | 2006-11-30 | Toyo Seikan Kaisha Ltd | Container for square battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725532A (en) * | 2021-08-25 | 2021-11-30 | 远景动力技术(江苏)有限公司 | Battery cover plate, battery and battery processing method |
| CN113725532B (en) * | 2021-08-25 | 2023-09-05 | 远景动力技术(江苏)有限公司 | Battery cover plate, battery and battery processing method |
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