CN106876620A - Secondary battery filling hole sealing assembly - Google Patents
Secondary battery filling hole sealing assembly Download PDFInfo
- Publication number
- CN106876620A CN106876620A CN201510928855.5A CN201510928855A CN106876620A CN 106876620 A CN106876620 A CN 106876620A CN 201510928855 A CN201510928855 A CN 201510928855A CN 106876620 A CN106876620 A CN 106876620A
- Authority
- CN
- China
- Prior art keywords
- injection hole
- sealing
- secondary cell
- liquid injection
- seal assembly
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 77
- 239000007924 injection Substances 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims description 30
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000005439 thermosphere Substances 0.000 claims 2
- 238000003466 welding Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 abstract 1
- 238000010309 melting process Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 description 6
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 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
- 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
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention provides a sealing component for a liquid injection hole of a secondary battery, which is used for sealing the liquid injection hole arranged on a top cover of the secondary battery and comprises: sealing nails and sealing films. The sealing nail is plugged into the liquid injection hole to seal the liquid injection hole for one time; the sealing film completely covers the liquid injection hole and is bonded on the top cover in a hot melting sealing mode so as to perform secondary sealing on the liquid injection hole. In the secondary battery injection hole sealing assembly according to the present invention, the sealing nail is inserted into the injection hole to perform primary sealing of the injection hole, and the sealing film completely covering the injection hole is subjected to a hot-melting process to be sealingly bonded to the top cap, thereby performing secondary sealing of the injection hole. The hot-melting connection method is adopted to replace a welding mode in the traditional technology, so that the problems of welding pinholes, explosion points, cracks and the like caused by welding are avoided, and the hot-melting sealing process is simple, convenient and reliable.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of secondary cell fluid injection bore seal assembly.
Background technology
In the manufacturing process of secondary cell (such as lithium ion battery), after fluid injection operation is completed,
Need for the liquid injection hole O on top cover 1 to carry out laser seal welding, to prevent the leakage of electrolyte.
In the prior art, as shown in Figures 6 and 7, specific implementation process is first to follow closely 2 with T-shaped sealing to clog
Liquid injection hole O on top cover 1, prevents electrolyte from overflowing pollution weld seam W, afterwards to remaining in liquid injection hole O
The electrolyte of top is cleaned, and finally leads to the wall of seal cover board 6 and the formation liquid injection hole O of top cover 1
Cross the mode of laser full weld to seal, weld gestalt into full weld weld seam W.
The energy density of laser welding is very high, up to 107W/cm2, metal surface can be heated and reach
More than the boiling point of material, vaporization is produced, now laser energy is delivered to metal inside, shape from metal surface
Into molten bath.When molten bath is close to T-shaped plastic seal nail 2, plastic seal nail 2 is local can be by moment vapour
Change, plastics steam sprays axially upward, drive molten bath weld seam W to produce pin hole, quick-fried point, split
The defects such as line.Similarly, when liquid injection hole O remained on surface electrolyte is not cleaned up, in the presence of laser
Also the defects such as pin hole, quick-fried point, crackle can be produced.
The content of the invention
In view of problem present in background technology, it is an object of the present invention to provide a kind of secondary cell
Fluid injection bore seal assembly, its use the method for hot-melt adhesive paste solve produced by welding welding pin hole,
The problems such as quick-fried point, crackle, and sealing process is simple, convenient, reliable.
To achieve these goals, the invention provides a kind of secondary cell fluid injection bore seal assembly, its use
Sealed in the liquid injection hole to being arranged on the top cover of secondary cell, including：Sealing nail and diaphragm seal.
Sealing nail is filled in liquid injection hole, and once sealing is carried out with to liquid injection hole；Diaphragm seal is completely covered liquid injection hole simultaneously
Hot-melting sealed is bonded on top cover, and secondary seal is carried out with to liquid injection hole.
Beneficial effects of the present invention are as follows：
In secondary cell fluid injection bore seal assembly of the invention, will sealing nail fill in it is right in liquid injection hole
Liquid injection hole carries out once sealing, and the diaphragm seal to being completely covered on liquid injection hole carries out hot melt treatment to seal
It is bonded on top cover, so as to carry out secondary seal to liquid injection hole.The present invention is by using this hot-melt adhesive paste
Method substitute the welding manner in conventional art, so as to avoid coming due to welded bands welding pin hole,
The problems such as quick-fried point, crackle, and the operation of this hot-melting sealed is simple, convenient, reliable.
Brief description of the drawings
Fig. 1 is before being sealed using the secondary cell liquid injection hole of secondary cell fluid injection bore seal assembly of the invention
Stereogram；
Fig. 2 is the exploded view of secondary cell fluid injection bore seal assembly of the invention；
Fig. 3 is assembling and the seal process schematic diagram of secondary cell fluid injection bore seal assembly of the invention；
Fig. 4 is the schematic diagram after secondary cell fluid injection bore seal assembly assembling of the invention and sealing；
Fig. 5 is the structural representation of the diaphragm seal of secondary cell fluid injection bore seal assembly of the invention；
Fig. 6 is the exploded view of secondary cell fluid injection bore seal assembly in the prior art；
Fig. 7 is the schematic diagram after secondary cell fluid injection bore seal assembly assembling in the prior art and sealing.
Wherein, description of reference numerals is as follows：
The heat transfer layer of 1 top cover 32
The heat-conducting layer of O liquid injection holes 33
2 sealing nails 4 heat head
The binding part of 21 insertion section 5
The seal cover board of 22 stopper section 6
3 diaphragm seal W weld seams
31 melting zones
Specific embodiment
Describe secondary cell fluid injection bore seal assembly of the invention in detail with reference to the accompanying drawings.
Referring to figs. 1 to Fig. 5, secondary cell fluid injection bore seal assembly of the invention, for setting
Sealed in the liquid injection hole O on the top cover 1 of secondary cell, it includes：Sealing nail 2 and diaphragm seal 3.
Sealing nail 2 is filled in liquid injection hole O, and once sealing is carried out with to liquid injection hole O；Diaphragm seal 3 covers completely
Simultaneously hot-melting sealed is bonded on top cover 1 lid liquid injection hole O, and secondary seal is carried out with to liquid injection hole O.
In secondary cell fluid injection bore seal assembly of the invention, sealing nail 2 is filled in into liquid injection hole O
In once sealing is carried out to liquid injection hole O, the diaphragm seal 3 to being completely covered on liquid injection hole O carries out heat
Molten treatment is bonded on top cover 1 with sealing, so as to carry out secondary seal to liquid injection hole O.The present invention passes through
The welding manner in conventional art is substituted using the method for this hot-melt adhesive paste, so as to avoid due to welding
The problems such as welding pin hole, quick-fried point, crackle for bringing, and the operation of this hot-melting sealed it is simple, convenient,
It is reliable.
Secondary cell fluid injection bore seal assembly of the invention, in one embodiment, reference picture 2 to figure
4, sealing nail 2 can be T-shaped.
In one embodiment, to Fig. 4, sealing nail 2 can have reference picture 2：Insertion section 21, insertion top
In liquid injection hole O on lid 1；And stopper section 22, it is resisted against on top cover 1.In the present embodiment,
The stopper section 22 of nail 2 is sealed in the liquid injection hole O that the insertion section 21 that nail 2 will be sealed is inserted on top cover 1
It is resisted against on top cover 1, can prevents electrolyte from overflowing, it is to avoid causes battery core electrolyte inside not enough and top
The surface contamination of lid 1 influences the hot melt quality of diaphragm seal 3.
In one embodiment, sealing nail 2 or taper or cylinder, but not only limit in this way, can also set
It is calculated as other shapes.
In one embodiment, sealing nail 2 can seal nail for plastic cement, and the material of sealing nail is not only limited such as certainly
This, can also according to specific needs select other types of material.
In one embodiment, reference picture 5, diaphragm seal 3 can have：Melting zone 31, is placed on top cover 1
So that liquid injection hole O is completely covered；Heat-conducting layer 32, is laminated on melting zone 31；And heat transfer layer 33,
Positioned at the superiors of diaphragm seal 3, outside heat is transferred to melting zone by heat transfer layer 32 via heat-conducting layer 32
31 melting melting zone 31.In the present embodiment, the meeting in high temperature melting of melting zone 31 of diaphragm seal 3
Closely continuous binding part 5 is formed with top cover 1, so as to liquid injection hole O is fully sealed.
In one embodiment, melting zone 31 is polypropylene layer；Heat-conducting layer 32 is aluminium foil；And heat transfer layer
33 is nylon layer, and this is the concrete structure (i.e. a kind of aluminum plastic film) of diaphragm seal of the present invention 3,
But not only limit is in this way, the melting zone 31 of diaphragm seal 3, heat-conducting layer 32 and heat transfer layer 33 can also use it
The material of its type is made.Wherein, in the present embodiment, heat-conducting layer 32 increased sealing using aluminium foil
The bulk strength and toughness of film 3, and enhance melting zone 31 thermal conductivity and Temperature Distribution it is uniform
Property, so as to improve the quality and efficiency of hot-melting sealed.
In one embodiment, the thickness of melting zone 31 can be 5 μm~15 μm.
In one embodiment, the thickness of heat-conducting layer 32 can be 5 μm~15 μm.
In one embodiment, the thickness of heat transfer layer 33 can be 5 μm~15 μm.
Remark additionally herein, above-described melting zone 31, heat-conducting layer 32 and heat transfer layer 33
Thickness range be currently preferred thickness range, based on actual demand, processing and produce, fusing
The thickness range of layer 31, heat-conducting layer 32 and heat transfer layer 33 all can be adjusted suitably.
In one embodiment, reference picture 2 and Fig. 3, the diaphragm seal in secondary cell fluid injection bore seal assembly
3 can carry out hot melt treatment using heating first 4, so as to diaphragm seal 3 melts and seals be bonded on top cover 1.
Claims (10)
1. a kind of secondary cell fluid injection bore seal assembly, for the top cover (1) to being arranged at secondary cell
On liquid injection hole (O) sealed, secondary cell fluid injection bore seal assembly includes：
Sealing nail (2), is filled in liquid injection hole (O), and once sealing is carried out with to liquid injection hole (O)；
Characterized in that, the secondary cell fluid injection bore seal assembly also includes：
Diaphragm seal (3), is completely covered liquid injection hole (O) and hot-melting sealed is bonded on top cover (1),
Secondary seal is carried out with to liquid injection hole (O).
2. secondary cell fluid injection bore seal assembly according to claim 1, it is characterised in that close
Envelope nail (2) is T-shaped.
3. secondary cell fluid injection bore seal assembly according to claim 2, it is characterised in that close
Envelope nail (2) has：
Insertion section (21), in the liquid injection hole (O) in insertion top cover (1)；And
Stopper section (22), is resisted against on top cover (1).
4. secondary cell fluid injection bore seal assembly according to claim 1, it is characterised in that close
Envelope nail (2) is taper or cylinder.
5. secondary cell fluid injection bore seal assembly according to claim 1, it is characterised in that close
Envelope nail (2) is followed closely for plastic cement is sealed.
6. secondary cell fluid injection bore seal assembly according to claim 1, it is characterised in that close
Sealer (3) has：
Melting zone (31), is placed on top cover (1) that liquid injection hole (O) is completely covered；
Heat-conducting layer (32), is laminated on melting zone (31)；And
Heat transfer layer (33), positioned at the superiors of diaphragm seal (3), heat transfer layer (32) is by outside warm
It is transferred to melting zone (31) to melt melting zone (31) via heat-conducting layer (32).
7. secondary cell fluid injection bore seal assembly according to claim 6, it is characterised in that
Melting zone (31) is polypropylene layer；
Heat-conducting layer (32) is aluminium foil；
Heat transfer layer (33) is nylon layer.
8. secondary cell fluid injection bore seal assembly according to claim 7, it is characterised in that molten
The thickness for changing layer (31) is 5 μm~15 μm.
9. secondary cell fluid injection bore seal assembly according to claim 7, it is characterised in that lead
The thickness of thermosphere (32) is 5 μm~15 μm.
10. secondary cell fluid injection bore seal assembly according to claim 7, it is characterised in that pass
The thickness of thermosphere (33) is 5 μm~15 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510928855.5A CN106876620B (en) | 2015-12-14 | 2015-12-14 | Secondary battery liquid injection hole sealing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510928855.5A CN106876620B (en) | 2015-12-14 | 2015-12-14 | Secondary battery liquid injection hole sealing assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106876620A true CN106876620A (en) | 2017-06-20 |
| CN106876620B CN106876620B (en) | 2023-08-22 |
Family
ID=59178609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510928855.5A Active CN106876620B (en) | 2015-12-14 | 2015-12-14 | Secondary battery liquid injection hole sealing assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106876620B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259846A (en) * | 2020-12-01 | 2021-01-22 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Power battery sealing structure and welding method thereof |
| CN112542664A (en) * | 2019-09-23 | 2021-03-23 | 湖南弘毅科技有限公司 | Square lithium battery and air tightness detection method thereof |
| CN113193276A (en) * | 2021-04-27 | 2021-07-30 | 宁德新能源科技有限公司 | Hard shell battery and power utilization device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11176418A (en) * | 1997-12-10 | 1999-07-02 | Mitsubishi Cable Ind Ltd | Sealed battery |
| CN1630118A (en) * | 2003-12-20 | 2005-06-22 | 鸿富锦精密工业（深圳）有限公司 | Method for sealing lithium ion battery |
| KR20080077424A (en) * | 2007-02-20 | 2008-08-25 | 삼성에스디아이 주식회사 | Secondary battery and method therefor |
| CN203165991U (en) * | 2013-03-08 | 2013-08-28 | 宁德新能源科技有限公司 | Filling port sealing device of lithium-ion battery |
| CN204809306U (en) * | 2015-07-15 | 2015-11-25 | 宁德时代新能源科技有限公司 | Secondary cell's notes liquid hole weld assembly |
| CN205211803U (en) * | 2015-12-14 | 2016-05-04 | 宁德时代新能源科技股份有限公司 | Secondary cell annotates liquid hole seal assembly |
-
2015
- 2015-12-14 CN CN201510928855.5A patent/CN106876620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11176418A (en) * | 1997-12-10 | 1999-07-02 | Mitsubishi Cable Ind Ltd | Sealed battery |
| CN1630118A (en) * | 2003-12-20 | 2005-06-22 | 鸿富锦精密工业（深圳）有限公司 | Method for sealing lithium ion battery |
| KR20080077424A (en) * | 2007-02-20 | 2008-08-25 | 삼성에스디아이 주식회사 | Secondary battery and method therefor |
| CN203165991U (en) * | 2013-03-08 | 2013-08-28 | 宁德新能源科技有限公司 | Filling port sealing device of lithium-ion battery |
| CN204809306U (en) * | 2015-07-15 | 2015-11-25 | 宁德时代新能源科技有限公司 | Secondary cell's notes liquid hole weld assembly |
| CN205211803U (en) * | 2015-12-14 | 2016-05-04 | 宁德时代新能源科技股份有限公司 | Secondary cell annotates liquid hole seal assembly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542664A (en) * | 2019-09-23 | 2021-03-23 | 湖南弘毅科技有限公司 | Square lithium battery and air tightness detection method thereof |
| CN112259846A (en) * | 2020-12-01 | 2021-01-22 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Power battery sealing structure and welding method thereof |
| CN113193276A (en) * | 2021-04-27 | 2021-07-30 | 宁德新能源科技有限公司 | Hard shell battery and power utilization device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106876620B (en) | 2023-08-22 |
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