CN216980825U - Lithium ion battery and top cover and positive pole for same - Google Patents
Lithium ion battery and top cover and positive pole for same Download PDFInfo
- Publication number
- CN216980825U CN216980825U CN202121331305.2U CN202121331305U CN216980825U CN 216980825 U CN216980825 U CN 216980825U CN 202121331305 U CN202121331305 U CN 202121331305U CN 216980825 U CN216980825 U CN 216980825U
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- top cover
- pole
- post
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 44
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 60
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000003466 welding Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model relates to the field of lithium ion batteries, and discloses a lithium ion battery, and a top cover and a positive post used for the lithium ion battery. Wherein positive post includes: the aluminum electrode comprises a series of aluminum electrode posts positioned at the lower end and a six-series aluminum electrode posts connected to the axial upper end of the series of aluminum electrode posts. By adopting the technical scheme, the connection convenience of the anode column is improved, and the bearable torsion strength of the anode column is improved.
Description
Technical Field
The utility model relates to the field of lithium ion batteries, and discloses a lithium ion battery and a top cover and a positive post used for the lithium ion battery.
Background
Along with the support and popularization of new energy in China, the market demand of power lithium batteries is increasing, the safety requirements of the lithium batteries are also increasing, and the requirements on the structural members of the power batteries are also higher.
Present lithium cell is in the electric motor car, the energy storage field is used extensively, and lithium cell top cap utmost point post interconnect assembles the module into, and its connected mode generally has two kinds:
firstly, the lithium ion battery is welded with the pole on the top cover of each lithium ion battery through laser welding, the adoption of the technical scheme has the advantage of good connection effect of the electric core body, but when the electric core is assembled into a module when the electric vehicle is assembled, the technical scheme has the defect of difficult replacement when a certain single battery has problems;
secondly, each lithium ion battery adopts the top cap that the post was threaded, uses the bolt to link together each lithium ion battery's post, adopts this scheme to have the advantage of easy change, nevertheless, probably has when using because the too big problem that leads to the impaired problem of post of torsion, leads to the damaged problem of lithium ion battery.
The inventor discovers in the process of researching the utility model that the prior positive pole column which adopts the whole pole column as the first series aluminum (also recorded as 1 series aluminum) or the whole pole column as the third series aluminum (also recorded as 3 series aluminum, the Vickers strength is 20-30HV and 40-50HV respectively) has the defects that the pole column strength is not good when the prior art is used, and the pole column is damaged when a bolt is screwed out, so that the battery cell cannot be used.
Disclosure of Invention
One of the objectives of the embodiments of the present invention is to provide a positive electrode post for a lithium ion battery, which is beneficial to improving the connection convenience of the positive electrode post and improving the bearable torsion strength.
The second purpose of the embodiments of the present invention is to provide a top cover for a lithium ion battery, which is beneficial to improving the connection convenience of a positive pole and the bearable torsion strength.
The third purpose of the embodiments of the present invention is to provide a lithium ion battery, which is beneficial to improving the connection convenience of the positive electrode column and improving the bearable torsion strength.
In a first aspect, an embodiment of the present invention provides a positive electrode post for a lithium ion battery, including: the aluminum-based electrode comprises a series of aluminum pole columns positioned at the lower end and a six-series aluminum pole column connected to the axial upper end of the series of aluminum pole columns.
Optionally, the first series of aluminum pole posts and the sixth series of aluminum pole posts are connected by friction welding.
Optionally, a threaded connection portion is further disposed on the six-series aluminum pole.
Optionally, the threaded connection portion is an internal threaded hole formed in the hexa-series aluminum pole.
Optionally, the threaded connection portion is an external thread provided on the hexa-series aluminum pole.
In a second aspect, an embodiment of the present invention provides a top cap for a lithium ion battery, including:
a top cap body to be sealed at the top of the lithium ion battery case,
the negative pole column penetrates through the top cover main body, the upper end of the negative pole column extends out of the top surface of the top cover main body, the lower end of the negative pole column extends out of the bottom surface of the top cover main body, and the negative pole column is in insulation connection with the top cover main body;
in any of the above positive post, the six-series aluminum terminal post located at the upper end of the positive post extends from the top surface of the top cover main body, the one-series aluminum terminal post located at the lower end of the positive post extends from the bottom surface of the top cover main body, and the positive post and the top cover main body are in insulation connection.
Optionally, the negative electrode pillar is a copper pillar.
Optionally, concave positions are respectively arranged on the positive pole column and the negative pole column, two anti-rotation ceramic blocks are further arranged under the top cover main body, and the two anti-rotation ceramic blocks are respectively limited in the concave positions of the positive pole column and the negative pole column.
In a third aspect, an embodiment of the present invention provides an ion battery, including:
a shell of the lithium ion battery is provided,
a battery cell sealed within the lithium ion battery housing,
in the top cap for a lithium ion battery as described above, the positive post on the top cap is connected to the positive electrode of the battery cell, the negative post is electrically connected to the negative electrode of the battery cell,
and the lower plastic part is arranged on the bottom surface of the top cover, and the top cover and the anode and the cathode of the battery cell are insulated and spaced.
Optionally, the positive post is electrically connected with the positive electrode through laser welding;
and/or the presence of a gas in the gas,
and the negative pole column is electrically connected with the negative pole through laser welding.
It is from top to bottom visible, adopt whole anodal post to be one system aluminium (also note 1 system aluminium) or whole anodal post is the technical scheme of three system aluminium for prior art, because the axial upper end of the anodal post of this embodiment adopts six system aluminium utmost point posts that yield strength is high, can improve the internal screw thread torsion of utmost point post on the lithium cell top cap, twist reverse the number of times, can avoid the external risk of destroying utmost point post of practical application when external, reduce the disability rate of electric core, can set up threaded connection portion on six system aluminium utmost point posts of upper end, make and adopt threaded connection with external component, improve the convenience of connecting and dismantling, the flexibility, greatly increased threaded connection's torsion scope, prevent that the bolt from destroying anodal post, lead to electric core to scrapping. The positive post lower extreme of this embodiment adopts the high aluminium utmost point post of a series of purity, and the welding between the utmost point ear that satisfies utmost point post and electric core that can be better is poor, avoids the welding that the explosion point leads to.
In conclusion, the technical scheme of the embodiment is favorable for improving the torque range of external connection of the pole of the lithium ion battery, and the strength of the pole is improved, so that the convenience of external connection is facilitated.
Drawings
Fig. 1 is a schematic top view of a top cover for a lithium ion battery provided in embodiment 1 of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 3 is a partially enlarged schematic view of section I of FIG. 2;
FIG. 4 is an enlarged view of detail II of FIG. 2;
FIG. 5 is a schematic view of the assembly structure of the top cover and the lower molding member shown in FIG. 1;
fig. 6 is a schematic view of the bottom structure of the lower plastic part in fig. 5.
1: a cap body; 2: a positive post; 3: a negative pole post; 4: an explosion-proof structure;
5: plastic parts are coated; 6: a seal ring; 7: a lower plastic part; 8: an anti-rotation ceramic block;
9: an internally threaded bore; 10: a liquid injection hole; 21: six series aluminum pole; 22: an aluminum post.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the utility model thereto.
Example 1:
referring to fig. 1-6, this embodiment provides a top cap suitable for a novel lithium ion battery and applied to this lithium ion battery, top cap main body 1 covers at the open-top of lithium ion battery shell, is provided with on top cap main body 1 and annotates liquid mouth 10 (sealed after annotating liquid), explosion-proof structure 4, and positive post 2, negative pole post 3 run through top cap main body 1, and the lower tip of positive post 2, negative pole post 3 stretches out from the bottom surface of top cap, with the sealed anodal of electric core in the shell, negative pole electric connection.
An upper plastic piece 5 is arranged on the top surface of the top cover main body 1, and the upper plastic piece 5 separates the upper end parts of the positive pole 2 and the negative pole 3 from the top cover main body 1 in an insulating way. Sealing rings 6 are respectively sleeved between the top cover main body 1 and the positive pole column 2 and between the top cover main body and the negative pole column 3, the sealing rings 6 are respectively sleeved at the lower end parts of the positive pole column 2 and the negative pole column 3, and the sealing rings 6 respectively insulate and separate the top cover main body 1 from the lower end parts of the positive pole column 2 and the negative pole column 3.
The bottom surface of the top cover main body 1 is provided with a lower plastic piece 7, the lower plastic piece 7 is tightly attached to the bottom surface of the top cover main body 1, and the top cover main body 1 is insulated and separated from electrodes (including a positive electrode and a negative electrode), a positive pole 2 and a negative pole 3 which are positioned in a battery shell.
As an indication of the present embodiment, a concave position is respectively disposed on the positive post 2 and the negative post 3 of the present embodiment, an anti-rotation ceramic block 8 engaged with the concave position is embedded in the concave position, and each anti-rotation ceramic block 8 covers between the top cover main body 1 and the positive post 2 and the negative post 3, so as to prevent the positive post 2 and the negative post 3 from rotating and shifting under the action of external torque, which is beneficial to improving the torque strength of the positive post 2 and the negative post 3.
As an illustration of the present embodiment, the negative electrode pillar 3 of the present embodiment may be, but is not limited to, a copper pillar, and a lower end portion of the copper pillar located below the bottom surface of the top cap main body 1 is connected to the negative electrode of the battery cell by ultrasonic welding. The upper end part of the copper column, which is positioned on the top surface of the top cover main body 1, is used as a negative electrode terminal of the lithium ion battery.
The upper end of the copper column is provided with a connecting part for connecting with an external device, the connecting part can be but is not limited to a threaded connecting part, such as but not limited to an external threaded part arranged on the copper column, or an internal threaded hole 9 arranged in the copper column, and the internal threaded hole 9 can be but not limited to a non-penetrating shape along the axial direction of the copper column, and can also be perpendicular to the axial direction, a penetrating shape or a non-penetrating shape.
As an illustration of the present embodiment, the positive electrode post 2 of the present embodiment includes a first series of aluminum electrode posts 22 located at the axial lower end and a sixth series of aluminum electrode posts 21 located at the axial upper end, the first series of aluminum electrode posts 22 extend out of the bottom surface of the top cover body 1 and may be but is not limited to be connected with the positive electrode of the battery core by ultrasonic welding (or may also be but is not limited to adopt other connection methods in the prior art), and the sixth series of aluminum electrode posts 21 extend out of the upper end of the top surface of the top cover body 1 and serve as the positive electrode terminal of the lithium ion battery.
A connection part for connecting with an external device is arranged on the hexa-series aluminum pole 21, and the connection part can be but is not limited to a threaded connection part, such as but not limited to an external threaded connection part arranged on the one-series aluminum pole 22, or an internal threaded hole 9 arranged in the one-series aluminum pole 22, and the internal threaded hole 9 can be but is not limited to a non-penetrating shape along the axial direction of the positive pole 2; the positive electrode terminal 2 may be, but not limited to, a penetrating type or a non-penetrating type.
As an illustration of the present embodiment, the six-series aluminum electrode posts 21 at the upper end and the one-series aluminum electrode posts 22 at the lower end of the positive electrode post 2 of the present embodiment are axially connected together by friction welding, and are of an integrated structure as viewed from the outside.
It is from top to bottom visible, adopt whole anodal post 2 to be a series of aluminium or whole anodal post 2 is 3 technical scheme of aluminium for prior art, because the high six aluminium utmost point posts 21 of yield strength are adopted to anodal post 2's of this embodiment axial upper end, can improve the internal screw thread torsion of utmost point post on the lithium cell top cap, twist reverse the number of times, can avoid the external risk of destroying utmost point post of practical application when external, reduce the disability rate of electric core, can set up threaded connection portion on six aluminium utmost point posts 21 of upper end, make and adopt threaded connection with external component, improve the convenience of connecting and dismantling, the flexibility, greatly increased threaded connection's torsion scope, prevent that the bolt from destroying anodal post 2, lead to electric core to scrapping. The lower end of the positive pole column 2 of the embodiment adopts the primary aluminum pole column 22 with high purity, so that the laser welding between the pole column and the pole lug of the battery cell can be better satisfied, and poor welding caused by explosion points is avoided.
In conclusion, the technical scheme of the embodiment is favorable for improving the torque range of external connection of the pole of the lithium ion battery, and the strength of the pole is improved, so that the convenience of external connection is facilitated.
The aluminum electrode post of this embodiment is a post made of aluminum, and the aluminum (also referred to as aluminum 1) is an aluminum material containing more than 99.00% of aluminum, and has good conductivity, good corrosion resistance, good welding performance, and low strength.
The six-series aluminum pole of the present embodiment is a column made of six-series aluminum alloy (also referred to as 6-series aluminum), which uses magnesium and silicon as main alloying elements and uses Mg2The Si phase is an aluminum alloy of strengthening phase, belonging to heat treatment strengthening aluminum alloy. The six-series aluminum alloy has the advantages of medium strength, high corrosion resistance, no stress corrosion cracking tendency, good welding performance, unchanged corrosion performance of a welding area, good formability, good process performance and the like. The most widely used six-series aluminum alloys are 6061 and 6063 alloys, which have the best combination properties, and the main products are extruded sections and are the best extruded alloys.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (10)
1. The utility model provides a positive post for lithium ion battery, characterized by includes: the aluminum-based electrode comprises a series of aluminum pole columns positioned at the lower end and a six-series aluminum pole column connected to the axial upper end of the series of aluminum pole columns.
2. The positive electrode post for a lithium ion battery according to claim 1,
the first series of aluminum pole posts and the sixth series of aluminum pole posts are connected in a friction welding mode.
3. The positive electrode post for a lithium ion battery according to claim 1,
and the six-series aluminum pole is also provided with a threaded connection part.
4. The positive electrode post for a lithium ion battery according to claim 3,
the threaded connection part is an internal threaded hole formed in the six-series aluminum pole.
5. The positive electrode post for a lithium ion battery according to claim 3,
the threaded connection part is an external thread arranged on the six-series aluminum pole.
6. A kind of lithium ion battery uses the top cap, characterized by, including:
a top cover main body sealed on the top of the lithium ion battery shell,
the negative pole column penetrates through the top cover main body, the upper end of the negative pole column extends out of the top surface of the top cover main body, the lower end of the negative pole column extends out of the bottom surface of the top cover main body, and the negative pole column is in insulation connection with the top cover main body;
the positive electrode post according to any one of claims 1 to 5, wherein six aluminum electrode posts located at the upper end of said positive electrode post protrude from the top surface of said top cover main body, and one aluminum electrode post located at the lower end of said positive electrode post protrudes from the bottom surface of said top cover main body, and is insulated and connected between said positive electrode post and said top cover main body.
7. The top cap for a lithium ion battery according to claim 6,
the negative pole column is a copper column.
8. The top cap for a lithium ion battery according to claim 6,
the positive pole and the negative pole are respectively provided with a concave position, the lower part of the top cover main body is also provided with two anti-rotation ceramic blocks, and the two anti-rotation ceramic blocks are respectively limited in the concave positions of the positive pole and the negative pole.
9. A lithium ion battery, comprising:
a shell of the lithium ion battery is provided,
a battery cell sealed within the lithium ion battery housing,
the top cap for a lithium ion battery of any of claims 6 to 8, wherein a positive post on the top cap is electrically connected to a positive electrode of the cell and a negative post is electrically connected to a negative electrode of the cell,
and the lower plastic part is arranged on the bottom surface of the top cover, and the top cover and the anode and the cathode of the battery cell are insulated and spaced.
10. The lithium ion battery according to claim 9,
the positive pole is electrically connected with the positive pole through laser welding;
and/or the presence of a gas in the gas,
and the negative pole column is electrically connected with the negative pole through laser welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331305.2U CN216980825U (en) | 2021-06-15 | 2021-06-15 | Lithium ion battery and top cover and positive pole for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331305.2U CN216980825U (en) | 2021-06-15 | 2021-06-15 | Lithium ion battery and top cover and positive pole for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216980825U true CN216980825U (en) | 2022-07-15 |
Family
ID=82338718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121331305.2U Expired - Fee Related CN216980825U (en) | 2021-06-15 | 2021-06-15 | Lithium ion battery and top cover and positive pole for same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216980825U (en) |
-
2021
- 2021-06-15 CN CN202121331305.2U patent/CN216980825U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |