CN214336870U - Tab structure, winding battery cell and lithium ion battery - Google Patents

Tab structure, winding battery cell and lithium ion battery Download PDF

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Publication number
CN214336870U
CN214336870U CN202120665941.2U CN202120665941U CN214336870U CN 214336870 U CN214336870 U CN 214336870U CN 202120665941 U CN202120665941 U CN 202120665941U CN 214336870 U CN214336870 U CN 214336870U
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tab
positive
negative
ear
positioning
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张治国
麦敬辉
邓健想
刘长昊
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Fullymax Battery Co ltd
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Fullymax Battery Co ltd
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    • 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

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Abstract

The application provides a utmost point ear structure, coiling electricity core and lithium ion battery. The tab structure comprises a positive tab, a negative tab and a tab positioning adhesive tape; the negative electrode tab is arranged adjacent to the positive electrode tab, and the negative electrode tab and the positive electrode tab are arranged in parallel; the tab positioning adhesive tape is connected with the positive tab and the negative tab respectively, a first included angle is formed between the tab positioning adhesive tape and the positive tab, a second included angle is formed between the tab positioning adhesive tape and the negative tab, the opening direction of the first included angle is the same as that of the second included angle, and the angle of the first included angle is equal to that of the second included angle. Adopt utmost point ear location sticky tape to advance line location connection to the positive negative pole ear simultaneously, will audio-visually parallel through the size of angle judge, the utmost point ear and the parallel location of negative pole ear are adjusted well to utmost point ear location sticky tape of being convenient for fixed, have reduced the positioning deviation between positive ear and the negative pole ear to improve the positioning accuracy between positive ear and the negative pole ear, ensured that positive ear and negative pole ear set up side by side.

Description

Tab structure, winding battery cell and lithium ion battery
Technical Field
The utility model relates to a lithium ion battery technical field especially relates to a utmost point ear structure, coiling electricity core and lithium ion battery.
Background
With the development of lithium ion battery technology, the lithium ion battery has the functions of small volume, high power and good heat dissipation, so that the lithium ion battery becomes a mainstream battery. The anode and the cathode of the traditional lithium ion battery are separately separated, namely, the anode and the cathode tabs are separately manufactured, and the lithium ion battery core is separately and respectively welded in a fixed position when the anode and the cathode tabs are welded.
However, different equipment and different operators have larger welding size deviation during production and manufacturing, the center distance of the positive electrode and the negative electrode has larger deviation when the positive electrode and the negative electrode are welded, the phenomena of inner eight and outer eight exist, the center distance deviation of the electrode lugs and the inner eight and outer eight influence the assembly structure and the assembly quality of the PACK, namely when the center distance of the electrode lugs is smaller, the positioning deviation of the positive electrode and the negative electrode is larger easily in the welding process of the positive electrode and the negative electrode, the side-by-side arrangement of the positive electrode and the negative electrode can not be ensured, and the qualification rate of the battery is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide a reduce positioning deviation's utmost point ear structure, coiling electricity core and lithium ion battery.
The purpose of the utility model is realized through the following technical scheme:
a tab structure comprises a positive tab, a negative tab and a tab positioning adhesive tape, wherein the positive tab is used for being welded with a positive plate; the negative electrode tab is arranged close to the positive electrode tab, the negative electrode tab and the positive electrode tab are arranged in parallel, and the negative electrode tab is used for being welded with a negative plate; the utmost point ear location sticky tape respectively with anodal ear and the negative pole ear is connected, utmost point ear location sticky tape with be formed with first contained angle between the anodal ear, utmost point ear location sticky tape still with be formed with the second contained angle between the negative pole ear, the opening direction of first contained angle with the opening direction of second contained angle is the same, just the angle of first contained angle with the angle of second contained angle equals.
In one embodiment, the first included angle is 53 ° to 127 °.
In one embodiment, the first included angle is 90 °.
In one embodiment, the distance between the tab positioning adhesive tape and the first end of the positive tab is equal to the distance between the tab positioning adhesive tape and the first end of the negative tab, wherein the first end of the positive tab is used for being connected with a positive plate, and the first end of the negative tab is used for being connected with a negative plate.
In one embodiment, the distance between the tab positioning adhesive tape and the second end of the positive tab is equal to the distance between the tab positioning adhesive tape and the second end of the negative tab, the second end of the positive tab is arranged far away from the positive plate, and the second end of the negative tab is arranged far away from the negative plate.
In one embodiment, the distance between the tab positioning adhesive tape and the first end of the positive tab is equal to the distance between the tab positioning adhesive tape and the second end of the positive tab.
In one embodiment, the tab positioning adhesive tapes are respectively connected with two surfaces of the positive tab.
In one embodiment, the tab positioning adhesive tapes are respectively connected with two sides of the negative tab.
A winding battery cell comprises the tab structure in any one of the above embodiments.
A lithium ion battery comprises the winding battery core in the embodiment.
Compared with the prior art, the utility model discloses at least, following advantage has:
under the condition that the included angles between the tab positioning adhesive tapes and the positive and negative tabs are the same respectively, the tab positioning adhesive tapes are adopted to simultaneously position and connect the positive and negative tabs, visual parallel is judged through the size of the angle, the tab positioning adhesive tapes are convenient to fix and position the parallel of the positive and negative tabs, and the positioning deviation between the positive and negative tabs is reduced, so that the positioning precision between the positive and negative tabs is improved, and the side-by-side arrangement of the positive and negative tabs is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a tab structure in an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a utmost point ear structure. In one embodiment, the tab structure comprises a positive tab, a negative tab and a tab positioning adhesive tape. And the positive lug is used for being welded with the positive plate. The negative pole ear is close to positive pole ear sets up, just the negative pole ear with positive pole ear parallel arrangement each other, the negative pole ear is used for welding with the negative pole piece. The tab positioning adhesive tape is respectively connected with the positive tab and the negative tab, a first included angle is formed between the tab positioning adhesive tape and the positive tab, and a second included angle is formed between the tab positioning adhesive tape and the negative tab. The opening direction of the first included angle is the same as that of the second included angle, and the angle of the first included angle is equal to that of the second included angle. Under the condition that the included angles between the tab positioning adhesive tapes and the positive and negative tabs are the same respectively, the tab positioning adhesive tapes are adopted to simultaneously position and connect the positive and negative tabs, visual parallel is judged through the size of the angle, the tab positioning adhesive tapes are convenient to fix and position the parallel of the positive and negative tabs, and the positioning deviation between the positive and negative tabs is reduced, so that the positioning precision between the positive and negative tabs is improved, and the side-by-side arrangement of the positive and negative tabs is ensured.
Please refer to fig. 1, which is a schematic structural diagram of a tab structure according to an embodiment of the present invention.
The tab structure 10 of an embodiment includes a positive tab 100, a negative tab 200, and a tab positioning tape 300. The positive tab 100 is used for welding with a positive plate. The negative electrode tab 200 is adjacent to the positive electrode tab 100, the negative electrode tab 200 is parallel to the positive electrode tab 100, and the negative electrode tab 200 is welded to a negative electrode plate. The tab positioning adhesive tape 300 is respectively connected with the positive tab 100 and the negative tab 200, a first included angle alpha 1 is formed between the tab positioning adhesive tape 300 and the positive tab 100, and a second included angle alpha 2 is formed between the tab positioning adhesive tape 300 and the negative tab 200. The opening direction of the first included angle alpha 1 is the same as the opening direction of the second included angle alpha 2, and the angle of the first included angle alpha 1 is equal to the angle of the second included angle alpha 2.
In this embodiment, under the condition that it is ensured that the included angles between the tab positioning tapes 300 and the positive and negative tabs are the same, the tab positioning tapes 300 are used for positioning and connecting the positive and negative tabs at the same time, so that the intuitive parallel is judged according to the size of the angle, the tab positioning tapes 300 are convenient to fix the parallel positioning of the positive tab 100 and the negative tab 200, and the positioning deviation between the positive tab 100 and the negative tab 200 is reduced, thereby improving the positioning accuracy between the positive tab 100 and the negative tab 200, and ensuring that the positive tab 100 and the negative tab 200 are arranged side by side.
In one embodiment, referring to fig. 1, the first included angle α 1 is 53 ° to 127 °. In this embodiment, the first included angle α 1 is equal to the second included angle α 2, that is, the included angle of the first included angle α 1 is the same as the included angle of the first included angle α 1, and the tab positioning tape 300 is used as a straight tape, so that it is convenient to determine that the positive tab 100 is parallel to the negative tab 200 when the tab positioning tape 300 is connected to the positive tab 100 and the negative tab 200. In order to reduce right anodal ear 100 and the location degree of difficulty of negative pole ear 200, even in utmost point ear positioning tape 300 will anodal ear 100 and negative pole ear 200 is fixed simultaneously, right utmost point ear positioning tape 300 with anodal ear 100 and contained angle between the negative pole is adjusted, because anodal ear 100 with interval between the negative pole ear 200 is smaller, if contained angle undersize or too big, leads to the edge of utmost point ear and electric core too close to and make anodal ear 100 and negative pole ear 200 contact easily, will the angle setting of first contained angle alpha 1 has been avoided the condition of short circuit between anodal ear 100 and the negative pole ear 200 at 53 to 127 within range.
Further, the angle of the first included angle α 1 is 90 °. In this embodiment, the tab positioning tape 300 is parallel to the edge of the battery cell, and when the angle of the first included angle α 1 is 90 °, the angle of the second included angle α 2 is also 90 °, so that the positive tab 100 and the negative tab 200 are both perpendicular to the edge of the battery cell, and thus the minimum distance between the positive tab 100 and the negative tab 200 is maximized, thereby effectively avoiding the short circuit between the positive tab 100 and the negative tab 200. And, will utmost point ear location sticky tape 300 with anodal ear 100 and set up to mutually perpendicular between the negative pole ear 200, be convenient for utmost point ear location sticky tape 300 is right simultaneously anodal ear 100 and negative pole ear 200 is fixed, has reduced promptly and has been located anodal ear 100 with utmost point ear location sticky tape 300's length between the negative pole ear 200, thereby has reduced utmost point ear location sticky tape 300's use amount, and then has reduced the cost of manufacture of utmost point ear structure.
Further, the distance between the tab positioning tape 300 and the first end of the positive tab 100 is equal to the distance between the tab positioning tape 300 and the first end of the negative tab 200, wherein the first end of the positive tab 100 is used for being connected with a positive tab, and the first end of the negative tab 200 is used for being connected with a negative tab. In this embodiment, the first end of positive tab 100 and the first end of negative tab 200 all welds with electric core, promptly the first end of positive tab 100 welds with positive plate, the first end of negative tab 200 welds with negative plate, the first end of positive tab 100 with interval between utmost point ear positioning tape 300 does anodal safe distance between utmost point ear positioning tape 300 and the positive plate, the first end of negative tab 200 with interval between utmost point ear positioning tape 300 does negative pole safe distance between utmost point ear positioning tape 300 and the negative plate. In order to avoid the situation that the tab positioning adhesive tape 300 is heated and melted during welding, the distance between the tab positioning adhesive tape 300 and the second end of the positive tab 100 is equal to the distance between the tab positioning adhesive tape 300 and the second end of the negative tab 200, so that the connection positions of the tab positioning adhesive tape 300, the positive tab 100 and the negative tab 200 are far away from the battery cell, and the tab positioning adhesive tape 300 is effectively protected.
Still further, the distance between the tab positioning adhesive tape 300 and the second end of the positive tab 100 is equal to the distance between the tab positioning adhesive tape 300 and the second end of the negative tab 200, the second end of the positive tab 100 is far away from the positive tab, and the second end of the negative tab 200 is far away from the negative tab. In this embodiment, the second end of the positive tab 100 and the second end of the negative tab 200 are used as the basis for determining the side by side, the distance between the tab positioning tape 300 and the second end of the positive tab 100 is equal to the distance between the tab positioning tape 300 and the second end of the negative tab 200, so that the free end of the positive tab 100 is aligned with the free end of the negative tab 200, and under the condition that the first included angle α 1 is equal to the second included angle α 2, the second end of the positive tab 100 and the second end of the negative tab 200 are aligned, so that the positive tab 100 and the negative tab 200 are arranged side by side, and the positioning deviation between the positive tab 100 and the negative tab 200 is further reduced.
In another embodiment, the distance between the tab positioning adhesive tape and the first end of the positive tab is equal to the distance between the tab positioning adhesive tape and the second end of the positive tab. Therefore, the tab positioning adhesive tape crosses the middle point of the positive tab and the middle point of the negative tab, and the positive tab and the negative tab are positioned more easily.
In one embodiment, referring to fig. 1, the tab positioning adhesive tape 300 is respectively attached to both sides of the positive tab 100. In this embodiment, the positive tab 100 is wrapped by the tab positioning adhesive tape 300, so that the connection area between the positive tab 100 and the tab positioning adhesive tape 300 is increased, and the connection stability between the positive tab 100 and the tab positioning adhesive tape 300 is improved.
In one embodiment, referring to fig. 1, the tab positioning tapes 300 are respectively connected to two sides of the negative tab 200. In this embodiment, the negative electrode tab 200 is wrapped by the tab positioning tape 300, so that the connection area between the negative electrode tab 200 and the tab positioning tape 300 is increased, thereby improving the connection stability between the negative electrode tab 200 and the tab positioning tape 300. In addition, in this embodiment, the positive tab 100 and the negative tab 200 are both wrapped by the tab positioning tape 300, so that the connection stability between the tab positioning tape 300 and each tab is further improved, the positioning deviation between each tab can be reduced in the subsequent welding process, and the positive positioning accuracy is further improved.
The application also provides a winding battery cell which comprises the tab structure in any one of the above embodiments. In this embodiment, the tab structure includes a positive tab, a negative tab, and a tab positioning tape. And the positive lug is used for being welded with the positive plate. The negative pole ear is close to positive pole ear sets up, just the negative pole ear with positive pole ear parallel arrangement each other, the negative pole ear is used for welding with the negative pole piece. The tab positioning adhesive tape is respectively connected with the positive tab and the negative tab, a first included angle is formed between the tab positioning adhesive tape and the positive tab, and a second included angle is formed between the tab positioning adhesive tape and the negative tab. The opening direction of the first included angle is the same as that of the second included angle, and the angle of the first included angle is equal to that of the second included angle. Under the condition that the included angles between the tab positioning adhesive tapes and the positive and negative tabs are the same respectively, the tab positioning adhesive tapes are adopted to simultaneously position and connect the positive and negative tabs, visual parallel is judged through the size of the angle, the tab positioning adhesive tapes are convenient to fix and position the parallel of the positive and negative tabs, and the positioning deviation between the positive and negative tabs is reduced, so that the positioning precision between the positive and negative tabs is improved, and the side-by-side arrangement of the positive and negative tabs is ensured.
The application also provides a lithium ion battery, which comprises the winding battery core in the embodiment. In this embodiment, the winding battery cell includes the tab structure described in any one of the above embodiments, and the tab structure includes a positive tab, a negative tab, and a tab positioning tape. And the positive lug is used for being welded with the positive plate. The negative pole ear is close to positive pole ear sets up, just the negative pole ear with positive pole ear parallel arrangement each other, the negative pole ear is used for welding with the negative pole piece. The tab positioning adhesive tape is respectively connected with the positive tab and the negative tab, a first included angle is formed between the tab positioning adhesive tape and the positive tab, and a second included angle is formed between the tab positioning adhesive tape and the negative tab. The opening direction of the first included angle is the same as that of the second included angle, and the angle of the first included angle is equal to that of the second included angle. Under the condition that the included angles between the tab positioning adhesive tapes and the positive and negative tabs are the same respectively, the tab positioning adhesive tapes are adopted to simultaneously position and connect the positive and negative tabs, visual parallel is judged through the size of the angle, the tab positioning adhesive tapes are convenient to fix and position the parallel of the positive and negative tabs, and the positioning deviation between the positive and negative tabs is reduced, so that the positioning precision between the positive and negative tabs is improved, and the side-by-side arrangement of the positive and negative tabs is ensured.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A tab structure, comprising:
the positive tab is used for being welded with the positive plate;
the negative electrode tab is arranged close to the positive electrode tab, the negative electrode tab and the positive electrode tab are arranged in parallel, and the negative electrode tab is used for being welded with a negative plate;
utmost point ear location sticky tape, utmost point ear location sticky tape respectively with anodal ear and the negative pole ear is connected, utmost point ear location sticky tape with be formed with first contained angle between the anodal ear, utmost point ear location sticky tape still with be formed with the second contained angle between the negative pole ear, the opening direction of first contained angle with the opening direction of second contained angle is the same, just the angle of first contained angle with the angle of second contained angle equals.
2. A tab structure as claimed in claim 1, wherein the first included angle is 53 ° to 127 °.
3. The tab structure of claim 2, wherein the angle of the first included angle is 90 °.
4. The tab structure of claim 3, wherein the tab positioning tape is located at a distance from a first end of the positive tab, which is used for connecting with a positive tab, and a first end of the negative tab, which is used for connecting with a negative tab.
5. The tab structure of claim 4, wherein the tab positioning tape is located at a distance from the second end of the positive tab equal to the distance from the tab positioning tape to the second end of the negative tab, the second end of the positive tab being located away from the positive tab, and the second end of the negative tab being located away from the negative tab.
6. The tab structure of claim 5, wherein the tab positioning tape is located a distance from the first end of the positive tab equal to the distance from the tab positioning tape to the second end of the positive tab.
7. The tab structure of claim 1, wherein the tab positioning tapes are respectively attached to both sides of the positive tab.
8. The tab structure as claimed in any one of claims 1 to 7, wherein the tab positioning tapes are respectively attached to both sides of the negative tab.
9. A wound cell comprising the tab structure of any of claims 1-8.
10. A lithium ion battery comprising the wound cell of claim 9.
CN202120665941.2U 2021-03-31 2021-03-31 Tab structure, winding battery cell and lithium ion battery Active CN214336870U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120665941.2U CN214336870U (en) 2021-03-31 2021-03-31 Tab structure, winding battery cell and lithium ion battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120665941.2U CN214336870U (en) 2021-03-31 2021-03-31 Tab structure, winding battery cell and lithium ion battery

Publications (1)

Publication Number Publication Date
CN214336870U true CN214336870U (en) 2021-10-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120665941.2U Active CN214336870U (en) 2021-03-31 2021-03-31 Tab structure, winding battery cell and lithium ion battery

Country Status (1)

Country Link
CN (1) CN214336870U (en)

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