CN107195847A - A kind of electrochemical device - Google Patents
A kind of electrochemical device Download PDFInfo
- Publication number
- CN107195847A CN107195847A CN201710254404.7A CN201710254404A CN107195847A CN 107195847 A CN107195847 A CN 107195847A CN 201710254404 A CN201710254404 A CN 201710254404A CN 107195847 A CN107195847 A CN 107195847A
- Authority
- CN
- China
- Prior art keywords
- pole
- cover plate
- shell
- electrochemical device
- welding
- 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
- 238000003466 welding Methods 0.000 claims abstract description 26
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000005476 soldering Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000243 solution 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
- 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
-
- 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
- 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
-
- 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
-
- 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
- H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
- H01M50/529—Intercell connections through partitions, e.g. in a battery casing
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- 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
-
- 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)
- Gas Exhaust Devices For Batteries (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
A kind of electrochemical device, including shell, shell includes cover plate and the housing of upper end open, battery core is provided with shell, is electrolyte, the housing upper securing cover plate between shell and battery core, cover plate is provided with two through holes, the pole of a welding electric core is fixed in each through hole, pole axial direction is provided with penetrating shoulder hole, and the shoulder hole is used to note electrolyte；Pole is two, a positive pole, and one is negative pole.Relative to prior art, technique effect of the invention is that liquid injection hole is opened in the middle of pole by the present invention, it is to avoid perforate on the cover board, and fluid injection completes to use thread seal, makes battery liquid-filling safer, and using the form of shoulder hole, it is to avoid leaked in injection process.
Description
Technical field
The present invention relates to a kind of electrochemical device, belong to technical field of lithium batteries.
Background technology
At present because lithium battery has the advantages that energy density is high, power density is high, recycle often, in intelligent hand
It is widely used in the equipment such as machine, wearable device, electric bicycle and new-energy automobile, as solution energy crisis and ring
The key of the global problems such as border pollution.Increasingly perfect with electric vehicle engineering, electric automobile and hybrid electric vehicle are from people
Daily life it is more and more nearer, huge business opportunity is there is, while electric automobile is to providing the lithium ion battery of energy for it
Performance propose higher requirement.
Widely used duricrust lithium battery in the market, the welding such as the widely used laser welding of welding of housing and cover plate
Method.Existing method for packing easily causes the problems such as weld seam is uneven, profile is ugly, and sealing is poor, uses technology mistake
It is more easy to wear in journey, lithium battery leakage is caused, serious potential safety hazard is had.The connection of lug and pole is main in the prior art
Have：Ultrasonic bonding, laser welding, resistance sweat soldering, riveting, bolt connection etc..Wherein ultrasonic bonding, laser welding,
Lug and pole metal can be merged by resistance sweat soldering.It can be said that the connection of lug and pole is electrokinetic cell
One very fatal link, affects the reliability and security of electrokinetic cell, finally market prospects to electrokinetic cell and new
The popularization of energy automobile plays an important role.
The content of the invention
The technical problem to be solved in the present invention is：Liquid injection hole is opened on the cover board, and fluid injection is inconvenient.
The electrochemical device in the middle of pole is opened in it is an object of the invention to provide a kind of liquid injection hole.
Technical scheme is specially：
A kind of electrochemical device, including shell, shell include being provided with battery core in cover plate and the housing of upper end open, shell, outside
It is electrolyte between shell and battery core, the housing upper securing cover plate, cover plate is provided with two through holes, each through hole and fixes one
The pole of individual welding electric core, pole axial direction is provided with penetrating shoulder hole, and the shoulder hole is used to note electrolyte；Pole is two,
One positive pole, one is negative pole.
The material of shell is aluminium, and its inner and outer surfaces is alchlor protective layer, and the thickness of protective layer is 0.1-1.0 μm.
Cover plate uses boss structure, and the part coordinated with pole is outwardly, and the stop part of pole is placed on the inside of protuberance.
Described switching piece and the tab welding of battery core are connected.
Sealed between cover plate and pole by sealing nail welding.
Cover plate is communicated with the cover plate welding safety valve on the outside of the safety vent in the external world, safety vent.
Above-mentioned all agitating friction welderings that are welded as are welded.
Relative to prior art, technique effect of the invention is that liquid injection hole is opened in the middle of pole by the present invention, it is to avoid in lid
Perforate on plate, fluid injection completes to use thread seal, makes battery liquid-filling safer, and using the form of shoulder hole, it is to avoid fluid injection
During leak.
Brief description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the schematic diagram that switching piece is connected with electrode.
Fig. 3 is the schematic diagram that switching piece is welded with battery core.
Fig. 4 is the schematic diagram of switching piece.
Fig. 5 is the schematic diagram of cover plate 5.
Fig. 6 is the schematic diagram of pole.
Fig. 7 is the schematic diagram of gasket seal, sealing gasket and cover plate connection.
Embodiment
A kind of electrochemical device, including shell, shell include being provided with battery core in cover plate 5 and the housing 9 of upper end open, shell
4, it is electrolyte between shell and battery core 4, the top securing cover plate 5 of housing 9, cover plate 5 is provided with two through holes, each through hole
The pole 2 of a welding electric core 4 is fixed, pole axial direction is provided with penetrating shoulder hole, and the shoulder hole is used to note electrolyte.
Pole 2 is two, a positive pole, and one is negative pole.
The material of shell is aluminium, and its inner and outer surfaces is fine and close alchlor protective layer, and its thickness is 0.1-1.0 μm, is protected
Sheath carries out anodic oxidation by cover plate 5 and housing 9 and formed.
Cover plate 5 uses boss structure, and the part coordinated with pole 2 is outwardly, and the stop part of pole 2 is placed in protuberance
Side, makes so improve enclosure interior space.
Described switching piece and the tab welding of battery core are connected, and both positive and negative polarity is connected using same method.
By sealing 3 welded seals of nail between cover plate 5 and pole 2.
Cover plate 5 is communicated with the Welding Safety valve 10 of cover plate 5 on the outside of the safety vent in the external world, safety vent.
Above-mentioned all agitating friction welderings that are welded as are welded（Refering to reference A）.
Positive pole switching piece is 0.8mm-2mm aluminium plate, and negative pole switching piece is 0.8mm-2mm nickel copper facing sheet material.
Cover plate is boss structure, is made of 1-2mm aluminium sheet, and cover plate carries out anodized.
The screw thread of pole 2 coordinates round nut 1, and gasket seal 7, the boss and cover plate of pole 2 are provided between cover plate 5 and round nut
Sealing gasket 6 is provided between 5.
The invention provides the fine and close alchlor protective layer that a kind of li battery shell surface is covered with 0.1-1.0 μm of thickness,
Wearability is good, and intensity is improved, and with excellent insulating properties, prevents outer cover body from directly being contacted with electrolyte, Jin Erfang
Only outer cover body is corroded.
The invention provides the welding method of a kind of use agitating friction welding lithium battery casing and cap.Rubbed with stirring
The mode for wiping welding carries out housing and cap encapsulation, is formed with closed loop and without the perfect weld seam of keyhole, weld seam has reliable
Intensity and sealing, and agitating friction welding temperature does not reach the fusion temperature of each part in battery, and heat input is smaller, effectively
Battery is protected, has a good application prospect, is worthy to be popularized.
Cover plate uses boss structure, saves enclosure interior space, substantially increases the energy density of full lug battery core.
The connection of lug and pole uses switching piece, and welding uses agitating friction weldering, the lug use of switching piece and battery core
Agitating friction weldering is welded, and pole is welded with switching piece using agitating friction weldering, is substantially increased the reliability of welding, is improved lithium
The security of battery, has a good application prospect.
The invention provides a kind of structure type of liquid injection hole, this liquid injection hole is opened in the middle of pole, it is to avoid opened on the cover board
Hole, makes battery more attractive in appearance, safer, and using the form of shoulder hole, it is to avoid leaked in injection process, fluid injection is completed
Using being welded again with agitating friction weldering after thread seal.
The method welding that safety valve is welded using agitating friction, greatly improves soldering reliability, is worthy to be popularized.
The assembly method of the present invention：
First, refering to Fig. 2, pole 2 is linked together with switching piece 8 by the way of agitating friction weldering, refering to Fig. 3, will be turned
Contact pin 8 and the lug of battery core 4 are connected using the method for agitating friction weldering, and both positive and negative polarity is connected using same method.
Second, refering to Fig. 1, the battery core for being welded with pole is put into housing 9, the gasket seal 7 on pad on pole.
3rd, using the method for agitating friction weldering on cover plate 5 Welding Safety valve, cover cover plate 5, refering to Fig. 1, cover plate with
Housing is welded using agitating friction weldering mode.
4th, the sealing gasket 6 on positive and negative polar cushion is screwed on round nut 1 in both positive and negative polarity respectively, tightened.
5th, electrolyte is injected from the liquid injection hole in the middle of pole 2, sealing nail 3 is screwed into, sealing nail and pole are rubbed using stirring
Wipe weldering welding.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (7)
1. a kind of electrochemical device, including shell, shell include cover plate（5）With the housing of upper end open（9）, shell is interior to be provided with electricity
Core（4）, in shell and battery core（4）Between be electrolyte, it is characterised in that：The housing（9）Top securing cover plate（5）, cover plate
（5）Provided with two through holes, a welding electric core is fixed in each through hole（4）Pole（2）, pole axial direction is provided with penetrating
Shoulder hole, the shoulder hole is used to note electrolyte；
Pole（2）For two, a positive pole, one is negative pole.
2. electrochemical device as claimed in claim 1, it is characterised in that：The material of shell is aluminium, and its inner and outer surfaces is three oxygen
Change aluminium protective layer, the thickness of protective layer is 0.1-1.0 μm.
3. electrochemical device as claimed in claim 2, it is characterised in that：Cover plate（5）Using boss structure, with pole（2）Coordinate
Part it is outwardly, pole（2）Stop part be placed on the inside of protuberance.
4. electrochemical device as claimed in claim 3, it is characterised in that：Described switching piece and the tab welding of battery core are connected.
5. electrochemical device as claimed in claim 4, it is characterised in that：Cover plate（5）With pole（2）Between pass through seal nail（3）
Welded seal.
6. electrochemical device as claimed in claim 5, it is characterised in that：Cover plate（5）It is communicated with the safety vent in the external world, safety vent
The cover plate in outside（5）Welding Safety valve（10）.
7. the electrochemical device as described in claim 1-6 any claims, it is characterised in that：It is above-mentioned it is all be welded as stirring
Friction welding (FW) is welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254404.7A CN107195847A (en) | 2017-04-18 | 2017-04-18 | A kind of electrochemical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254404.7A CN107195847A (en) | 2017-04-18 | 2017-04-18 | A kind of electrochemical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107195847A true CN107195847A (en) | 2017-09-22 |
Family
ID=59872068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710254404.7A Pending CN107195847A (en) | 2017-04-18 | 2017-04-18 | A kind of electrochemical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107195847A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012124009A (en) * | 2010-12-08 | 2012-06-28 | Panasonic Corp | Secondary battery and manufacturing method thereof |
| JP2014207095A (en) * | 2013-04-11 | 2014-10-30 | 株式会社豊田自動織機 | Power storage device and method for manufacturing power storage module |
| CN104466077A (en) * | 2014-12-16 | 2015-03-25 | 天津神鹿能源有限公司 | Liquid injection explosion-proof pole structure of cylindrical power battery |
-
2017
- 2017-04-18 CN CN201710254404.7A patent/CN107195847A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012124009A (en) * | 2010-12-08 | 2012-06-28 | Panasonic Corp | Secondary battery and manufacturing method thereof |
| JP2014207095A (en) * | 2013-04-11 | 2014-10-30 | 株式会社豊田自動織機 | Power storage device and method for manufacturing power storage module |
| CN104466077A (en) * | 2014-12-16 | 2015-03-25 | 天津神鹿能源有限公司 | Liquid injection explosion-proof pole structure of cylindrical power battery |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170922 |
|
| RJ01 | Rejection of invention patent application after publication |