CN219937327U - Corrosion-resistant lithium ion battery - Google Patents
Corrosion-resistant lithium ion battery Download PDFInfo
- Publication number
- CN219937327U CN219937327U CN202321551500.5U CN202321551500U CN219937327U CN 219937327 U CN219937327 U CN 219937327U CN 202321551500 U CN202321551500 U CN 202321551500U CN 219937327 U CN219937327 U CN 219937327U
- Authority
- CN
- China
- Prior art keywords
- component
- stop piece
- electrode
- corrosion
- lithium ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 23
- 230000007797 corrosion Effects 0.000 title claims abstract description 23
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 53
- 239000003292 glue Substances 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 239000012943 hotmelt Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 13
- 239000003792 electrolyte Substances 0.000 abstract description 6
- 239000000428 dust Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000733 Li alloy Inorganic materials 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
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a corrosion-resistant lithium ion battery, which comprises a shell, an electrode assembly, a cover plate assembly, a protection assembly and a lower stop piece, wherein the cover plate assembly is arranged at the top of the shell; the protection assembly is positioned between the cap assembly and the lower stopper, and is welded with the electrode terminal in the cap assembly. According to the utility model, the protective component is arranged between the cover plate component and the electrode component, the lower stop piece below the protective component is matched with the cover plate component, and the welding area between the protective component and the lower stop piece is also provided with the insulating glue, so that the insulating glue has the performances of bonding the metal surface and resisting electrolyte corrosion, and can protect a weaker welding area from corrosion when being coated on the welding area, thereby improving the safety performance of the battery; and the upper part of the protection component is welded with the cover plate component, and the lower part of the protection component is welded with the electrode component.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to a corrosion-resistant lithium ion battery.
Background
The lithium ion battery is a secondary battery which is formed by taking lithium metal or lithium alloy as a positive electrode material and using a nonaqueous electrolyte solution, and the aim of green development is fulfilled by using a large amount of secondary batteries. In the manufacturing process of the secondary battery, trace moisture exists in the electrolyte, the trace moisture in the electrolyte of the battery reacts with main components of the electrolyte to generate hydrofluoric acid at high temperature, the material of a negative electrode connecting piece of the secondary battery is copper generally, an oxide layer on the surface of copper is sparse, and under the combined action of heat generation and hydrofluoric acid, the oxide layer on the surface of copper is further oxidized to generate black copper oxide, so that the negative electrode connecting piece of the lithium ion battery is blackened and corroded, and the consistency, the safety and the service life of the battery are affected. In addition, in the processing process of the secondary battery, a plurality of parts need to adopt a welding process, a large amount of dust is generated during welding of the cover plate, the dust cannot be completely removed by the dust removing device, the dust is left near the welding position, and the dust can enter the battery to cause thermal runaway of the battery.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the problem that the existing lithium ion battery negative electrode connecting piece is generally blackened is solved, and the strength, the consistency, the safety and the service life of the battery can be influenced to a certain extent by the blackened negative electrode connecting piece.
In order to solve the technical problems, the utility model provides the following technical scheme:
the corrosion-resistant lithium ion battery comprises a shell, an electrode assembly, a cover plate assembly, a protection assembly and a lower stop piece, wherein the cover plate assembly is arranged at the top of the shell;
the protective component is positioned between the cover plate component and the lower stop piece, is welded with the electrode terminal in the cover plate component, and is also provided with insulating glue in a welding area between the protective component and the electrode terminal; the protection component is also welded with the electrode lug on the electrode component.
According to the utility model, the protective component is arranged between the cover plate component and the electrode component, the lower stop piece below the protective component is matched with the cover plate component, and the welding area between the protective component and the lower stop piece is also provided with the insulating glue, so that the insulating glue has the performances of bonding the metal surface and resisting electrolyte corrosion, and can protect a weaker welding area from corrosion when being coated on the welding area, thereby improving the safety performance of the battery; and the protection component is welded with the cover board component above and welded with the electrode component below, and the lower stop piece is used for pressing the cover board component and the protection component at the moment, so that stable connection among the cover board component, the protection component and the electrode component can be ensured, other designs are not needed, and the electrode component welding device has the advantage of simple structure.
As a further scheme of the utility model: the cover plate assembly comprises a top cover, an upper stop piece and a buckle, wherein the top cover is arranged at the top of the shell, the upper stop piece is positioned at the bottom of the top cover, the electrode terminals are arranged on two sides of the top cover, and the upper stop piece is detachably arranged on the lower stop piece through the buckle at the bottom.
As a further scheme of the utility model: the electrode terminal is embedded into the top cover and the upper stop piece, and the electrode terminal and the upper stop piece are provided with steps, and the upper stop piece is fixedly connected with the top cover.
As a further scheme of the utility model: the protection component comprises a connecting piece, a welding part and a second welding area, wherein one end of the connecting piece is provided with the welding part welded with the electrode terminal, and the other end of the connecting piece is provided with two second welding areas used for being connected with the electrode component.
As a further scheme of the utility model: the welding part comprises a first welding area used for being welded with the electrode terminal, and the insulating glue is adhered to the first welding area.
As a further scheme of the utility model: the area of the insulating glue is larger than that of the first welding area.
As a further scheme of the utility model: through holes are formed in the two ends of the lower stop piece, and a clamping hole connected with the cover plate assembly is formed in the middle of the lower stop piece, wherein the center of the through hole is the same as the center of the insulating glue.
Compared with the prior art, the utility model has the beneficial effects that:
firstly, the protective component is arranged between the cover plate component and the electrode component, the lower stop piece below the protective component is matched with the cover plate component, and the welding area between the protective component and the lower stop piece is also provided with insulating glue which has the performances of bonding the metal surface and resisting electrolyte corrosion, so that the weaker welding area can be protected from corrosion when the insulating glue is coated on the welding area, dust can be prevented from entering the electrode component, the safety performance of a battery is improved, and the service life of the battery is prolonged;
secondly, the upper part of the protection component is welded with the cover plate component, the lower part of the protection component is welded with the electrode component, and the lower stop piece is used for pressing the cover plate component and the protection component, so that stable connection among the cover plate component, the protection component and the electrode component can be ensured, other designs are not needed, and the electrode component has the advantage of simple structure;
finally, through the through holes arranged at the corresponding positions of the lower stop piece and the center of the insulating glue, the center size of the through holes is larger than that of the insulating glue, so that the through holes are just matched with the insulating glue, and the stability of the protection component is ensured.
Drawings
Fig. 1 is an overall schematic diagram of a corrosion-resistant lithium ion battery according to an embodiment of the present utility model;
fig. 2 is a schematic bottom view of an embodiment of a corrosion-resistant lithium ion battery;
FIG. 3 is a front cross-sectional view of FIG. 1 in accordance with an embodiment of the present utility model;
FIG. 4 is a schematic view of a cover assembly according to an embodiment of the present utility model;
FIG. 5 is a front view of a protective assembly according to an embodiment of the present utility model;
FIG. 6 is a bottom view of FIG. 5 in accordance with an embodiment of the present utility model;
FIG. 7 is a schematic view of a lower stopper according to an embodiment of the present utility model;
reference numerals illustrate: 1. a housing; 2. a cover plate assembly; 21. an electrode terminal; 22. a top cover; 23. an upper stopper; 24. a buckle; 3. a protection component; 31. a connecting piece; 32. a welding part; 321. a first welding area; 322. insulating glue; 33. a second welding area; 4. a lower stopper; 41. a through hole; 42. a snap hole; 5. an electrode assembly; 6. and a tab.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, 2 and 3, a corrosion-resistant lithium ion battery comprises a housing 1, a cover plate assembly 2, a protection assembly 3, a lower stop member 4 and an electrode assembly 5, wherein the cover plate assembly 2 is mounted at the top of the housing 1, the protection assembly 3, the lower stop member 4 and the electrode assembly 5 are all arranged in the housing 1, the lower stop member 4 is positioned at the bottom of the cover plate assembly 2, one surface of the protection assembly 3 is welded with the cover plate assembly 2, the other surface is connected with a tab 6 on the electrode assembly 5, the tab 6 and the protection assembly 3 are pressed between the lower stop member 4 and the cover plate assembly 2 together by the lower stop member 4, the two electrode assemblies 5 are folded in half and bent at 90 degrees with the tab 6, and finally the housing 1 is used for accommodating the whole.
Referring to fig. 3 and 4, the cover plate assembly 2 includes positive and negative electrode terminals 21, a top cover 22, an upper stopper 23 and a buckle 24, wherein the top cover 22 is mounted on the top of the housing 1, the upper stopper 23 is located at the bottom of the top cover 22, the electrode terminals 21 are arranged at two sides of the top cover 22, and the upper stopper 23 is in snap connection with the buckle hole 42 on the lower stopper 4 through the buckle 24 at the bottom, and it should be noted that the size of the top cover 22 is matched with the size of the top opening of the housing 1, and after the placement of devices in the housing 1 is completed, the top cover is welded with the housing 1 to form a sealed environment inside the battery cell.
Further, the positive and negative electrode terminals 21 are fitted into the top cover 22 and the upper stopper 23, and the electrode terminals 21 and the upper stopper 23 are stepped, and the upper stopper 23 is welded to the top cover 22.
Referring to fig. 1, the protection assembly 3 includes two connection members 31, a welding portion 32 and a second welding area 33, the connection members 31 are connection members of the electrode assembly 5 and the electrode terminals 21, the connection members 31 are integrally in a "U" structure, the second welding area 33 has two positions, which are respectively located at two ends, and the welding portion 32 has one position, which is located at a middle position (as shown in fig. 6), and the two connection members 31 are respectively connected with the positive electrode terminal 21 and the negative electrode terminal 21 in a matched manner, the positive connection member 31 is made of aluminum or aluminum alloy, the negative connection member 31 is made of copper or copper alloy, one end of the connection member 31 is provided with a welding portion 32 welded with the electrode terminals 21, and the other end of the connection member 31 is provided with two second welding areas 33 for connecting with the tabs 6 on the electrode assembly 5.
Further, the welding part 32 includes a first welding area 321 for welding with the electrode terminal 21, and an insulating paste 322 is adhered to the first welding area 321. The area of the insulating paste 322 is larger than that of the first bonding region 321.
In order to solve the blackening problem of the connection member, the present utility model preferably provides an insulating paste 322 on the first welding area 321 of the connection member 31. The insulating glue 322 needs to completely cover the solder marks of the first soldering region 321, the insulating glue 322 is tightly attached to the lower surface of the connecting piece 31, other substances are prevented from contacting with the soldering region, and residues in the soldering region are prevented from falling.
It should be noted that the insulating glue 322 may be uv glue, hot melt glue or other glue that may be used for metal bonding. After the corresponding process treatment, the solid matters formed in the first welding area 322 become the insulating glue of the utility model, the insulating glue 322 is adhered to the lower surface of the connecting piece 31, the insulating glue has a certain height along the z axis, and the diameter of the insulating glue 322 is about 2-3mm larger than that of the first welding area 321; in order to prevent the upper surface of the insulating glue 322 from colliding with the lower surface of the lower stopper 4, the present utility model preferably provides a through hole 41 at a position corresponding to the center of the lower stopper 4 and the insulating glue 322, i.e. the insulating glue 322 just matches with the through hole 41, and no other treatment is required.
Referring to fig. 3 and 7, the center of the through hole 41 of the lower stopper 4 coincides with the center of the insulating paste 322 and the first welding area 321, and the diameter of the through hole 41 is 0-2mm greater than the diameter of the insulating paste 322; the lower stopper 4 is connected with the upper stopper 23 through the catching hole 42 and the catching 24.
The specific operation principle of the utility model is as follows: when the utility model is installed, firstly, positive and negative connecting pieces 31 are respectively corresponding to positive and negative electrode terminals 21 on a cover plate assembly 2, positive electrodes are corresponding to positive electrodes, negative electrodes are corresponding to negative electrodes, then a first welding area 321 on the connecting piece 31 is welded with the corresponding electrode terminal 21, after welding is finished, two electrode assemblies 5 are taken, positive and negative electrode lugs 6 on the electrode assemblies 5 are matched with the corresponding connecting pieces 31 and welded with second welding areas 33 on the connecting pieces 31, after welding is finished, a state shown in fig. 2 is formed, then the lower stop piece 4 is turned over, the protective assembly 3 and the electrode lugs 6 are pressed between the lower stop piece 4 and the cover plate assembly 2, then the two electrode assemblies 5 are folded in half and bent at 90 degrees with the electrode lugs 6, finally, the whole body is contained by using a shell 1, and then the cover plate assembly 2 is welded.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. The corrosion-resistant lithium ion battery comprises a shell (1) and an electrode assembly (5), and is characterized by further comprising a cover plate assembly (2), a protection assembly (3) and a lower stop piece (4), wherein the cover plate assembly (2) is arranged at the top of the shell (1), the protection assembly (3), the lower stop piece (4) and the electrode assembly (5) are all arranged in the shell (1), and the lower stop piece (4) is positioned at the bottom of the cover plate assembly (2);
the protection component (3) is positioned between the cover board component (2) and the lower stop piece (4) and is welded with the electrode terminal (21) in the cover board component (2), and an insulating adhesive (322) is further arranged in a welding area between the protection component (3) and the electrode terminal (21); the protection component (3) is also welded with the electrode lug (6) on the electrode component (5).
2. The corrosion-resistant lithium ion battery of claim 1, wherein: the cover plate assembly (2) comprises a top cover (22), an upper stop piece (23) and a buckle (24), wherein the top cover (22) is arranged at the top of the shell (1), the upper stop piece (23) is arranged at the bottom of the top cover (22), the electrode terminals (21) are arranged on two sides of the top cover (22), and the upper stop piece (23) is detachably arranged on the lower stop piece (4) through the buckle (24) at the bottom.
3. The corrosion-resistant lithium ion battery of claim 2, wherein: the electrode terminal (21) is embedded into the top cover (22) and the upper stop piece (23), the electrode terminal (21) and the upper stop piece (23) are provided with steps, and the upper stop piece (23) is fixedly connected with the top cover (22).
4. The corrosion-resistant lithium ion battery of claim 1, wherein: the protection component (3) comprises a connecting piece (31), a welding part (32) and a second welding area (33), wherein the welding part (32) welded with the electrode terminal (21) is arranged at one end of the connecting piece (31), and two second welding areas (33) used for being connected with the electrode component (5) are arranged at the other end of the connecting piece (31).
5. The corrosion resistant lithium ion battery of claim 4, wherein: the welding part (32) comprises a first welding area (321) for welding with the electrode terminal (21), and insulating glue (322) is adhered to the first welding area (321).
6. The corrosion resistant lithium ion battery of claim 5, wherein: the area of the insulating glue (322) is larger than that of the first welding area (321).
7. The corrosion-resistant lithium ion battery of claim 1, wherein: through holes (41) are formed in the two ends of the lower stop piece (4), and a clamping hole (42) connected with the cover plate assembly (2) is formed in the middle of the lower stop piece (4), wherein the center of the through holes (41) is the same as the center of the insulating glue (322).
8. The corrosion resistant lithium ion battery of claim 7, wherein: the diameter of the through hole (41) is 0-2mm larger than that of the insulating glue (322).
9. The corrosion-resistant lithium ion battery of claim 1, wherein: the insulating glue (322) is uv glue or hot melt glue or other glue for metal bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321551500.5U CN219937327U (en) | 2023-06-15 | 2023-06-15 | Corrosion-resistant lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321551500.5U CN219937327U (en) | 2023-06-15 | 2023-06-15 | Corrosion-resistant lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219937327U true CN219937327U (en) | 2023-10-31 |
Family
ID=88497114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321551500.5U Active CN219937327U (en) | 2023-06-15 | 2023-06-15 | Corrosion-resistant lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219937327U (en) |
-
2023
- 2023-06-15 CN CN202321551500.5U patent/CN219937327U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |