CN219937118U - Battery and battery core - Google Patents

Battery and battery core Download PDF

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Publication number
CN219937118U
CN219937118U CN202320688119.7U CN202320688119U CN219937118U CN 219937118 U CN219937118 U CN 219937118U CN 202320688119 U CN202320688119 U CN 202320688119U CN 219937118 U CN219937118 U CN 219937118U
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China
Prior art keywords
tab
battery
main body
tabs
pole piece
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Active
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CN202320688119.7U
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Chinese (zh)
Inventor
韩冰
陈贤锐
纪荣进
李聪
王诗龙
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Huizhou Liwinon Energy Technology Co Ltd
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Huizhou Liwinon Energy Technology Co Ltd
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Priority to CN202320688119.7U priority Critical patent/CN219937118U/en
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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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  • Connection Of Batteries Or Terminals (AREA)

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and a battery core, wherein the battery core comprises a main body part and a pole ear part, and the pole ear part is arranged on the main body part; the tab part comprises a first tab and a second tab with opposite polarities, the first tab and the second tab are arranged at intervals in the length direction of the main body part, the number of the first tab is more than that of the second tab, and the total layer number of the first tab is the same as that of the second tab in the thickness direction of the main body part; the total layer number of the first tab is the same as the total layer number of the second tab, so that the layer number of the first tab is reduced, the width of the first tab after the battery cell is wound is prevented from being increased, the distance between the first tab and the second tab is reduced, the risk of short circuit of the battery is reduced, meanwhile, the distance between the first tab and the second tab can be properly shortened in the design process, the width of the battery cell is reduced, and the battery cell can be suitable for a narrower battery.

Description

Battery and battery core
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery and a battery core.
Background
In the process of generating a battery, the electric chip forms an electric core through a winding process, wherein tabs on the electric chip are overlapped to form a positive electrode or a negative electrode of the electric core. The existing battery cell is generally provided with two positive electrodes and one negative electrode, the total number of layers of the positive electrodes is larger than that of the negative electrodes, however, the electrode lugs are offset at the designated positions along with winding accuracy, the more the number of the electrode lug layers is, the worse the electrode lug overlap ratio is, the larger the width of the electrode lugs is, the smaller the interval between the adjacent positive electrode lugs and the adjacent negative electrode lugs is, and the risk of short circuit of the battery is increased.
Disclosure of Invention
One of the objects of the present utility model is: the utility model provides a battery cell to solved among the prior art and receive the influence of coiling precision, the tab can be along with coiling and at appointed position skew, the more the tab layer number, the worse the tab overlap ratio, the width of tab is bigger for the interval between adjacent anodal ear and the negative pole ear is less, has increased the technical problem of the risk of battery short circuit.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an electric core comprises a main body part and a lug part, wherein the lug part is arranged on the main body part;
the tab portion comprises a first tab and a second tab with opposite polarities, the first tab and the second tab are arranged at intervals in the length direction of the main body portion, the number of the first tabs is more than that of the second tabs, and the total layer number of the first tabs is the same as that of the second tabs in the thickness direction of the main body portion.
Preferably, the number of the first tabs is twice the number of the second tabs.
Preferably, the width of the single-layer first tab is equal to the width of the single-layer second tab.
Preferably, the main body part comprises a first pole piece, a second pole piece and a diaphragm, wherein the first pole piece, the diaphragm and the second pole piece are sequentially stacked and wound to form the main body part, the first pole lug is arranged on the first pole piece, and the second pole lug is arranged on the second pole piece.
Preferably, the plurality of first tabs are divided into at least two tab groups, each tab group comprises at least two first tabs, at least two tab groups are arranged at equal intervals along the length direction of the first pole piece, and after the battery cell is wound, at least two tab groups are overlapped to form a first output terminal.
Preferably, the first output terminal is located at one side of the main body portion.
Preferably, the spacing between two adjacent first tabs in each tab group is equal.
Preferably, the distance between two adjacent tab groups is larger than the width of each tab group.
Preferably, the plurality of second tabs are arranged at equal intervals along the length direction of the second pole piece, and after the battery core is wound, the plurality of second tabs are overlapped to form a second output terminal.
Another object of the utility model is: there is provided a battery comprising a cell as described in any one of the preceding description.
Compared with the prior art, the utility model has the beneficial effects that:
through the cooperation of main part and tab portion, the tab portion includes first tab and the second tab that the polarity is opposite, in the thickness direction of main part, the total layer number of first tab is the same with the total layer number of second tab, thereby reduce the layer number setting of first tab, it is more to make the alignment and the overlapping effect of first tab after the electric core is convoluteed, with the width increase of first tab after preventing the electric core is convoluteed, lead to the interval between first tab and the second tab to diminish, and then reduced the risk of battery short circuit, simultaneously in the design process, can suitably shorten the interval of first tab and second tab, in order to reduce the width of electric core, thereby make the electric core can be fit for narrower battery.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural view of a first pole piece according to the present utility model.
Fig. 3 is another schematic structural view of the first pole piece of the present utility model.
Fig. 4 is a schematic structural view of a second pole piece of the present utility model.
Fig. 5 is another schematic structural view of the second pole piece of the present utility model.
Reference numerals:
100. a battery cell;
10. a main body portion; 11. a first pole piece; 12. a second pole piece;
20. a tab portion; 21. a first tab; 22. a second lug;
a. the thickness direction of the main body part; b. the width of the single-layer first tab; c. the width of the single-layer second lug; d. the length direction of the first pole piece; e. the length direction of the second pole piece; f. the width of the tab group; g. the length direction of the main body.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only 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.
The present utility model will be described in further detail with reference to fig. 1 to 5, but the present utility model is not limited thereto.
The battery cell 100 of the embodiment of the utility model comprises a main body part 10 and a tab part 20, wherein the tab part 20 is arranged on the main body part 10; the tab portion 20 includes first tabs 21 and second tabs 22 having opposite polarities, the first tabs 21 and the second tabs 22 are spaced apart in a length direction g of the main body portion 10, the number of the first tabs 21 is greater than the number of the second tabs 22, and the total number of layers of the first tabs 21 is the same as the total number of layers of the second tabs 22 in a thickness direction a of the main body portion 10.
Compared with the prior art, the battery cell 100 of the embodiment of the utility model uses the main body 10 and the tab 20 in a matching way, the tab 20 comprises the first tab 21 and the second tab 22 with opposite polarities, and the total layer number of the first tab 21 is the same as the total layer number of the second tab 22 in the thickness direction a of the main body 10, so that the layer number setting of the first tab 21 is reduced, the alignment and overlapping effect of the first tab 21 after the battery cell 100 is wound is improved, the width of the first tab 21 after the battery cell 100 is prevented from being increased, the distance between the first tab 21 and the second tab 22 is reduced, the risk of short circuit of a battery is further reduced, and meanwhile, the distance between the first tab 21 and the second tab 22 can be properly shortened in the design process, so that the battery cell 100 can be suitable for a narrower battery.
One of the first tab 21 and the second tab 22 is a positive tab, and the other is a negative tab. Preferably, the first tab 21 is a positive tab and the second tab 22 is a negative tab.
In the present embodiment, the number of the first tabs 21 is twice the number of the second tabs 22. Through setting up the number of first utmost point ear 21 and the number of second utmost point ear 22, the number of first utmost point ear 21 is the twice of the number of second utmost point ear 22, has effectually increased the number of first utmost point ear 21, guarantees the current-carrying capacity of first utmost point ear 21.
In the present embodiment, the width b of the single-layer first tab 21 is equal to the width c of the single-layer second tab 22. Through setting up the width b of individual layer first utmost point ear 21 and the width c of individual layer second utmost point ear 22, the width b of individual layer first utmost point ear 21 equals the width c of individual layer second utmost point ear 22, because the total number of piles of first utmost point ear 21 is the same with the total number of piles of second utmost point ear 22, in the design process, need not to increase the width c of individual layer second utmost point ear 22, makes can not shorten the interval between first utmost point ear 21 and the second utmost point ear 22 after electric core 100 winds, and then has reduced the risk of battery short circuit.
In this embodiment, the main body 10 includes a first pole piece 11, a second pole piece 12, and a diaphragm, where the first pole piece 11, the diaphragm, and the second pole piece 12 are stacked in order and wound to form the main body 10, the first tab 21 is disposed on the first pole piece 11, and the second tab 22 is disposed on the second pole piece 12.
One of the first electrode sheet 11 and the second electrode sheet 12 is a positive electrode sheet, and the other is a negative electrode sheet. The positive plate comprises a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive electrode current collector comprises a positive electrode coating region and a positive electrode lug connected to the positive electrode coating region, wherein the positive electrode coating region is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode lug connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode lug is not coated with the negative electrode active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.
Preferably, the first electrode sheet 11 is a positive electrode sheet, and the second electrode sheet 12 is a negative electrode sheet.
In this embodiment, the plurality of first tabs 21 are divided into at least two tab groups, each tab group includes at least two first tabs 21, the at least two tab groups are disposed at equal intervals along the length direction d of the first pole piece 11, and after the winding of the battery core 100 is completed, the at least two tab groups overlap to form a first output terminal. Through the setting of at least two tab groups, at least two tab groups are equidistant along length direction d of first pole piece 11 to the effectual arrangement of tab group sets up, so that after the coiling of electric core 100 is accomplished, at least two tab groups overlap and form first output terminal, and first output terminal is used for being connected with external power source.
In the present embodiment, the first output terminal is located on one side of the main body portion 10. Through the setting of first output terminal, set up first output terminal in the one side of main part 10, the tab group is towards the one side overlapping gathering of main part 10, is convenient for follow-up welding to first output terminal.
In this embodiment, the spacing between two adjacent first tabs 21 in each tab group is equal. Through the interval setting of two adjacent first utmost point ear 21, in the same group, the interval of two adjacent first utmost point ear 21 equals, and the effectual first utmost point ear 21 to in the same group of arranging guarantees that the interval between the first utmost point ear 21 in the same group equals.
In this embodiment, the distance between two adjacent tab groups is greater than the width f of each tab group. Through the interval of two adjacent tab group and the width f comparison of every tab group, the interval of two adjacent tab groups is greater than the width f of every tab group, and after electric core 100 is convoluteed and is accomplished, reducible first tab 21's layer number setting makes first tab 21 alignment after electric core 100 is convoluteed and overlap the effect more to prevent the width increase of first tab 21 after electric core 100 is convoluteed, lead to the interval between first tab 21 and the second tab 22 to diminish, and then reduced the risk of battery short circuit.
In the present embodiment, the plurality of second tabs 22 are disposed at equal intervals along the length direction e of the second tab 12, and after the winding of the battery cell 100 is completed, the plurality of second tabs 22 overlap to form the second output terminal. Through setting up a plurality of second ears 22, a plurality of second ears 22 are equidistant along length direction e of second pole piece sets up, and effectual arrangement to second ears 22 to make after the coiling of electric core 100 is accomplished, a plurality of second ears 22 overlap and form the second output terminal, and the second output terminal is used for being connected with external power source.
The battery of the embodiment of the present utility model includes the battery cell 100 of any of the embodiments described above.
Compared with the prior art, the battery of the embodiment of the utility model adopts the battery core 100 of any embodiment, the total layer number of the first tab 21 of the battery core 100 is the same as the total layer number of the second tab 22, so that the layer number setting of the first tab 21 is reduced, the alignment and overlapping effects of the first tab 21 after the winding of the battery core 100 are improved, the width of the first tab 21 after the winding of the battery core 100 is prevented from being increased, the distance between the first tab 21 and the second tab 22 is reduced, the risk of short circuit of the battery is further reduced, and meanwhile, the distance between the first tab 21 and the second tab 22 can be properly shortened in the design process, so that the width of the battery core 100 is reduced, and the battery core 100 can be suitable for narrower batteries.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The battery cell is characterized by comprising a main body part (10) and a lug part (20), wherein the lug part (20) is arranged on the main body part (10);
the tab part (20) comprises a first tab (21) and a second tab (22) with opposite polarities, the first tab (21) and the second tab (22) are arranged at intervals in the length direction (g) of the main body part (10), the number of the first tab (21) is more than that of the second tab (22), and the total layer number of the first tab (21) is the same as that of the second tab (22) in the thickness direction (a) of the main body part.
2. The cell of claim 1, wherein the number of first tabs (21) is twice the number of second tabs (22).
3. The cell of claim 1, wherein a width (b) of a single layer of the first tab (21) is equal to a width (c) of a single layer of the second tab (22).
4. The battery cell according to claim 1, wherein the main body portion (10) includes a first pole piece (11), a second pole piece (12) and a diaphragm, the first pole piece (11), the diaphragm and the second pole piece (12) are sequentially stacked and wound to form the main body portion (10), the first tab (21) is disposed on the first pole piece (11), and the second tab (22) is disposed on the second pole piece (12).
5. The battery cell according to claim 4, wherein the plurality of first tabs (21) are divided into at least two tab groups, each tab group includes at least two first tabs (21), the at least two tab groups are arranged at equal intervals along a length direction (d) of the first pole piece (11), and after the battery cell (100) is wound, the at least two tab groups overlap to form a first output terminal.
6. The cell of claim 5, wherein the first output terminal is located on one side of the body portion (10).
7. The cell of claim 5, wherein the spacing between adjacent two of said first tabs (21) in each of said tab sets is equal.
8. The cell of claim 5, wherein a spacing between two adjacent tab groups is greater than a width (f) of each tab group.
9. The battery cell according to claim 4, wherein a plurality of the second tabs (22) are disposed at equal intervals along a length direction (e) of the second pole piece (12), and the plurality of the second tabs (22) overlap to form a second output terminal after the battery cell (100) is wound.
10. A battery comprising a cell according to any one of claims 1 to 9.
CN202320688119.7U 2023-03-31 2023-03-31 Battery and battery core Active CN219937118U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320688119.7U CN219937118U (en) 2023-03-31 2023-03-31 Battery and battery core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320688119.7U CN219937118U (en) 2023-03-31 2023-03-31 Battery and battery core

Publications (1)

Publication Number Publication Date
CN219937118U true CN219937118U (en) 2023-10-31

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ID=88499740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320688119.7U Active CN219937118U (en) 2023-03-31 2023-03-31 Battery and battery core

Country Status (1)

Country Link
CN (1) CN219937118U (en)

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