CN210866343U - Tab and lithium ion battery - Google Patents
Tab and lithium ion battery Download PDFInfo
- Publication number
- CN210866343U CN210866343U CN201922301172.3U CN201922301172U CN210866343U CN 210866343 U CN210866343 U CN 210866343U CN 201922301172 U CN201922301172 U CN 201922301172U CN 210866343 U CN210866343 U CN 210866343U
- Authority
- CN
- China
- Prior art keywords
- tab
- utmost point
- point ear
- head
- root
- 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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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 14
- 210000004027 cell Anatomy 0.000 claims description 16
- 210000005056 cell body Anatomy 0.000 claims description 12
- 239000002390 adhesive tape Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052744 lithium Inorganic materials 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
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
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- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a utmost point ear and lithium ion battery. The tab comprises a tab root part for inserting the battery cell and a tab head part connected with the tab root part; the thickness of the root part of the tab is smaller than that of the head part of the tab. The thickness that will be used for inserting the utmost point ear root of electric core sets up to be less than the thickness of utmost point ear head to ensure that the energy density of electric core is enough high, and the thickness that stretches out in the outside utmost point ear head of electric core is greater than the thickness of utmost point ear root, and then guaranteed that utmost point ear stretches out in the outside part of electric core and has sufficient intensity, therefore the utmost point ear that this embodiment provided has still guaranteed that utmost point ear stretches out in the outside part of electric core and has sufficient intensity under the enough high condition of energy density of having guaranteed electric core, utmost point ear is difficult for splitting in the production process of lithium cell.
Description
Technical Field
The utility model relates to a lithium cell field especially relates to a utmost point ear and lithium ion battery.
Background
The lithium ion battery positive pole uses the aluminium utmost point ear, and the negative pole uses the nickel utmost point ear, and positive negative pole utmost point ear inserts the electric core in order to constitute the essential part of lithium cell, because the urgent demand to battery energy density, needs to reduce the holistic thickness of positive negative pole utmost point ear, makes the intensity of utmost point ear reduce when utmost point ear thickness reduces, and utmost point ear is easy to split in the manufacturing process of battery.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a utmost point ear and lithium ion battery aims at solving prior art, the easy cracked problem of utmost point ear in the manufacturing process of battery.
To achieve the purpose, the utility model adopts the following technical proposal:
the tab comprises a tab root part for inserting the battery cell and a tab head part connected with the tab root part; the thickness of the root part of the tab is smaller than that of the head part of the tab.
Further, the thickness of the tab head is in the range of 80-120 microns.
Further, the thickness of the root part of the tab ranges from 15 micrometers to 45 micrometers.
Furthermore, the tab head and the tab root are of an integrally formed structure.
Furthermore, the root of the tab and the connecting part connected with the head of the tab are positioned in the middle of the head of the tab.
Further, the tab is an aluminum sheet.
Further, the tab is a nickel sheet.
Further, the battery comprises a battery cell body, two tabs and a tab adhesive tape; the root part of the tab is inserted into the battery cell body, and the tab adhesive tape covers the connecting part of the root part of the tab and the head part of the tab.
Further, the tab head is located outside the cell body.
Further, the tab adhesive tape is a polypropylene adhesive tape.
The utility model has the advantages that: the thickness that will be used for inserting the utmost point ear root of electric core sets up to be less than the thickness of utmost point ear head to ensure that the energy density of electric core is enough high, and the thickness that stretches out in the outside utmost point ear head of electric core is greater than the thickness of utmost point ear root, and then guaranteed that utmost point ear stretches out in the outside part of electric core and has sufficient intensity, therefore the utmost point ear that this embodiment provided has still guaranteed that utmost point ear stretches out in the outside part of electric core and has sufficient intensity under the enough high condition of energy density of having guaranteed electric core, utmost point ear is difficult for splitting in the production process of lithium cell.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural view of a side view direction of a tab in an embodiment of the present invention;
fig. 2 is a schematic structural view of a side view direction of a tab in an embodiment of the present invention (when a tab tape is provided);
fig. 3 is a schematic structural diagram of a lithium ion battery according to an embodiment of the present invention;
in the figure:
100. a tab; 1. the root parts of the tabs; 2. the head part of the tab; 3. a cell body; 4. and (5) tab adhesive tapes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
As shown in fig. 1-2, an embodiment of the present invention provides a tab 100, including a tab root 1 for inserting a battery cell, and a tab head 2 connected to the tab root 1; the thickness d1 of the tab root part 1 is smaller than the thickness d2 of the tab head part 2.
In the embodiment of the present invention, the thickness d1 of the tab root 1 for inserting into the battery cell is set to be smaller than the thickness d2 of the tab head 2, and the thickness d1 of the tab root 1 is reduced to ensure that the tab root 1 has no influence on the overall thickness of the battery cell, so as to ensure that the energy density of the battery cell is high enough (the thinner the portion of the tab 100 inserted into the battery cell is, the higher the energy density of the battery cell is), and the thickness d2 of the tab head 2 protruding outside the battery cell is greater than the thickness d1 of the tab root 1, thereby ensuring that the portion of the tab 100 protruding outside the battery cell (i.e. the tab head 2) has sufficient strength, and the portion of the tab 100 protruding outside the battery cell (i.e. the tab head 2) is easily touched and deformed and broken during the manufacturing process of the lithium battery, so that the tab 100 provided in this embodiment also ensures that the portion of the tab 100 protruding outside the battery cell (the tab head 2), the tab 100 is not easily broken during the production process of the lithium battery.
In the embodiment of the utility model, the thickness of utmost point ear root 1 reduces along the direction of keeping away from utmost point ear head 2 gradually, is convenient for insert electric core.
Further, referring to fig. 1-2, as another embodiment of the tab 100 provided by the present invention, the thickness d2 of the tab head 2 ranges from 80 micrometers to 120 micrometers to ensure that the tab head 2 has sufficient strength. In other embodiments, the thickness d2 of the tab head 2 may also be 70 microns, 80 microns, 90 microns, 100 microns, 110 microns, or … … 180 microns.
Further, referring to fig. 1-2, as another specific embodiment of the tab 100 provided by the present invention, the thickness d1 of the tab root 1 ranges from 15 micrometers to 45 micrometers, so as to achieve that the thickness d1 of the tab root 1 is small enough to meet the requirement of the battery cell for energy density. In other embodiments, the thickness d1 of the tab root 1 may also be 10 microns, 11 microns … … 59 microns, 60 microns. And when the thickness d2 of the tab head part 2 is 100 microns and the thickness d1 of the tab root part 1 is 30 microns, the tab 100 can achieve the best use effect.
Further, referring to fig. 1-2, as another embodiment of the tab 100 provided by the present invention, the tab head 2 and the tab root 1 are integrally formed, that is, the tab 100 is an integral piece, so as to ensure the connection strength between the tab head 2 and the tab root 1.
Further, please refer to fig. 1-2, as another specific embodiment of the tab 100 provided by the present invention, the connection portion between the tab root portion 1 and the tab head portion 2 is located at the middle portion of the tab head portion 2, and the tab head portion 2 is not easy to deflect relative to the tab root portion 1 when receiving external force, so as to further ensure the overall strength of the tab 100.
Further, referring to fig. 1-2, as another embodiment of the tab 100 provided by the present invention, the tab 100 is an aluminum sheet, and the aluminum sheet tab 100 can be selected as a positive electrode tab 100 of a lithium ion battery.
Further, referring to fig. 1-2, as another embodiment of the tab 100 provided by the present invention, the tab 100 is a nickel plate, and the nickel plate tab 100 can be selected as a negative electrode tab 100.
As shown in fig. 3, an embodiment of the present invention further provides a lithium ion battery, which includes a battery cell body 3, two tabs 100 as described above, and a tab adhesive tape 4; the tab root 1 is inserted into the battery cell body 3, and the tab adhesive tape 4 covers the connecting portion between the tab root 1 and the tab head 2. The tab adhesive tape 4 is partially located inside the cell body 3, the rest part of the tab adhesive tape is located outside the cell body 3, and the tab adhesive tape 4 can be used as an insulating part of the tab 100 and a fixing part of the tab and the cell body 3.
Further, please refer to fig. 3, as another specific embodiment of the lithium ion battery provided by the present invention, the tab head 2 is located outside the electric core body 3.
Further, referring to fig. 3, as another specific embodiment of the lithium ion battery provided by the present invention, the tab tape 4 is a polypropylene tape.
It is to be understood that aspects of the present invention may be modified in various other respects.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The tab is characterized by comprising a tab root part for inserting a battery cell and a tab head part connected with the tab root part; the thickness of the root part of the tab is smaller than that of the head part of the tab; the thickness of the root part of the tab ranges from 15 micrometers to 45 micrometers.
2. The tab as claimed in claim 1, wherein the tab head has a thickness ranging from 80 microns to 120 microns.
3. The tab as claimed in claim 1, wherein the tab is of an integrally formed structure.
4. The tab as claimed in claim 1 or 3, wherein the connection part of the tab root part to the tab head part is located at the middle of the tab head part.
5. The tab as claimed in claim 1, wherein the tab is an aluminum sheet.
6. The tab as claimed in claim 1, wherein the tab is a nickel sheet.
7. The lithium ion battery is characterized by comprising a cell body, two tabs according to any one of claims 1 to 6 and tab tapes; the root part of the tab is inserted into the battery cell body, and the tab adhesive tape covers the connecting part of the root part of the tab and the head part of the tab.
8. The lithium ion battery of claim 7, wherein the tab head is located external to the cell body.
9. The lithium ion battery of claim 7, wherein the tab tape is a polypropylene tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922301172.3U CN210866343U (en) | 2019-12-18 | 2019-12-18 | Tab and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922301172.3U CN210866343U (en) | 2019-12-18 | 2019-12-18 | Tab and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210866343U true CN210866343U (en) | 2020-06-26 |
Family
ID=71291427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922301172.3U Active CN210866343U (en) | 2019-12-18 | 2019-12-18 | Tab and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210866343U (en) |
-
2019
- 2019-12-18 CN CN201922301172.3U patent/CN210866343U/en active Active
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| GR01 | Patent grant |