CN211125880U - Lithium ion battery cell and lithium ion battery - Google Patents
Lithium ion battery cell and lithium ion battery Download PDFInfo
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- CN211125880U CN211125880U CN201922289657.5U CN201922289657U CN211125880U CN 211125880 U CN211125880 U CN 211125880U CN 201922289657 U CN201922289657 U CN 201922289657U CN 211125880 U CN211125880 U CN 211125880U
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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
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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
- 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
Abstract
This scheme discloses a lithium ion battery electricity core, include electric core shell and in the anodal and negative pole that electric core shell homonymy outside extended, anodal utmost point ear and the anodal mass flow body of including, the negative pole includes negative pole utmost point ear and negative pole mass flow body, a serial communication port, anodal utmost point ear has the anodal ear root of being connected with the anodal mass flow body and keeps away from the anodal ear head of the anodal mass flow body, negative pole utmost point ear has the negative pole ear root of being connected with the negative pole mass flow body and keeps away from the negative pole ear head of negative pole mass flow body, the width of anodal ear head is less than the width of anodal ear root, the width of. Simultaneously, still provide the lithium ion battery who adopts above-mentioned electric core in this scheme, set up the width of utmost point ear head for being less than utmost point ear root's width, can avoid electric core manufacturing and in the use because anodal utmost point ear and negative pole utmost point ear distance lead to electric core short circuit too closely, can reduce utmost point ear and mass flow body welding resistance simultaneously, and then promote the performance of electric core.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a lithium ion battery electricity core and lithium ion battery.
Background
The method is characterized in that a narrow battery cell is required to be used in some electronic product fields, the width of the battery cell is small, the distance between two positive and negative electrode lugs at a leading-out end of the battery cell is small, and the battery is short-circuited due to the fact that the positive and negative electrode lugs are easy to contact because the gaps between the positive and negative electrode lugs are small in the manufacturing and using processes of the battery cell, so that a battery cell manufacturer can select the electrode lug with the small width (usually 2mm) as much as possible when; there are some disadvantages to using tabs with small widths: 1. The tab has small width, small contact area when being welded with the current collector and larger risk of insufficient welding; 2. the electrode lug has small width and small contact area after being welded with a current collector, so that the ohmic internal resistance of the single battery cell is large, and the electrical property of the battery cell can be reduced in use.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an aim at: the lithium ion battery cell and the lithium ion battery can solve the technical problems in the prior art.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a lithium ion battery cell, include the electric core casing and in the positive pole and the negative pole that the electric core casing homonymy extends to the outside, the positive pole includes anodal utmost point ear and the anodal mass flow body, the negative pole includes negative pole utmost point ear and the negative pole mass flow body, anodal utmost point ear have with anodal ear root that the anodal mass flow body is connected and keep away from the anodal ear head portion of the anodal mass flow body, negative pole utmost point ear have with negative pole ear root that the negative pole mass flow body is connected and keep away from the negative pole ear head portion of the negative pole mass flow body, the width of anodal ear head portion is less than the width of anodal ear root, the width of negative pole ear.
As a preferred technical solution of the lithium ion battery cell, a center line of the head portion of the positive tab along the length direction thereof and a center line of the root portion of the positive tab along the length direction thereof are overlapped with each other; the center line of the negative electrode tab part along the length direction of the negative electrode tab part and the center line of the negative electrode tab root part along the length direction of the negative electrode tab part are mutually overlapped.
As a preferred technical solution of the lithium ion battery cell, the root of the positive tab has a first side edge of the positive tab far away from one side of the negative tab, and the head of the positive tab has a second side edge of the positive tab far away from one side of the negative tab; the first side edge of the positive lug is overlapped with the second side edge of the positive lug.
As a preferred technical solution of the lithium ion battery cell, the root of the negative electrode tab has a first side edge of the negative electrode tab far away from one side of the positive electrode tab, and the head of the negative electrode tab has a second side edge of the negative electrode tab far away from one side of the positive electrode tab; the first side edge of the negative electrode lug is overlapped with the second side edge of the negative electrode lug.
As a preferred technical solution of the lithium ion battery cell, along the width direction of the cell casing, the width of the root of the positive tab is smaller than the width of the positive current collector, and the width of the root of the negative tab is smaller than the width of the negative current collector.
As an optimal technical scheme of the lithium ion battery cell, the positive electrode tab is connected with the positive electrode current collector through laser welding, and the negative electrode tab is connected with the negative electrode current collector through laser welding.
As a preferred technical scheme of the lithium ion battery cell, an anode fusing groove is arranged at a position where the anode tab part is connected with the anode tab root part, a cathode fusing groove is arranged at a position where the cathode tab part is connected with the cathode tab root part, and the anode fusing groove and the cathode fusing groove have the same size
As a preferred technical scheme of the lithium ion battery cell, the positive tab portion is provided with a positive tab insulating sleeve, and the negative tab portion is provided with a negative tab insulating sleeve.
As a preferred technical solution of the lithium ion battery cell, the length of the positive tab insulating sleeve is greater than the length of the positive tab portion, and the length of the negative tab insulating sleeve is greater than the length of the negative tab portion.
In another aspect, a lithium ion battery is provided, which includes a casing and a battery cell accommodated in the casing, where the battery cell is the lithium ion battery cell described above.
The utility model has the advantages that: set up the width through the width with utmost point ear head for being less than utmost point ear root, can avoid on the one hand because anodal utmost point ear and negative pole utmost point ear distance lead to electric core short circuit too closely in electric core manufacturing and the use, on the other hand can reduce utmost point ear and mass flow body welding resistance, and then promote the performance of electric core.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is a schematic diagram of a structure of a lithium ion battery cell according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a battery cell structure of a lithium ion battery according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a structure of a lithium ion battery cell according to a third embodiment of the present invention.
Fig. 4 is a schematic diagram of a lithium ion battery cell structure according to the fourth embodiment of the present invention.
In the figure:
1. a cell shell; 2. a positive current collector; 3. a negative current collector; 4. a positive tab portion; 5. the root of the positive lug; 6. a negative tab portion; 7. the root of the negative electrode tab; 8. a positive electrode fusing groove; 9. a negative electrode fusing groove; 10. a positive lug insulating sleeve; 11. and a negative electrode lug insulating sleeve.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless otherwise expressly specified or limited, the term "connected" is to be construed broadly and "fixed", e.g., as a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The utmost point ear portion includes anodal ear portion 4 and negative pole ear portion 6 in this scheme description, and the utmost point ear root includes anodal ear root 5 and negative pole ear root 7, and utmost point ear includes anodal utmost point ear and negative pole utmost point ear, and the mass flow body includes anodal mass flow body 2 and negative pole mass flow body 3, and insulating cover includes anodal ear insulating cover 10 and negative pole ear insulating cover 11.
The first embodiment is as follows:
as shown in fig. 1, this embodiment provides a lithium ion battery cell, including cell casing 1 and in the positive pole and the negative pole that cell casing 1 homonymy extends to the outside, the positive pole includes anodal utmost point ear and anodal mass flow body 2, the negative pole includes negative pole utmost point ear and negative mass flow body 3, anodal utmost point ear have with anodal ear root 5 that anodal mass flow body 2 connects and keep away from anodal ear portion 4 of anodal mass flow body 2, the negative pole utmost point ear have with negative pole ear root 7 that negative mass flow body 3 connects and keep away from the negative pole ear portion 6 of negative mass flow body 3, the width of anodal ear portion 4 is less than the width of anodal ear root 5, the width of negative pole ear portion 6 is less than the width of negative pole ear root 7.
Set up the width through the width with utmost point ear head for being less than utmost point ear root, can avoid on the one hand because anodal utmost point ear and negative pole utmost point ear distance lead to electric core short circuit too closely in electric core manufacturing and the use, on the other hand can reduce utmost point ear and mass flow body welding resistance, and then promote the performance of electric core.
Specifically, this scheme is optional sets up the width for being less than the width of unidimensional tradition electric core utmost point ear for the width with utmost point ear head, and the width of utmost point ear root is the same with the width of tradition unidimensional electric core utmost point ear, can increase the distance between anodal ear head 4 and the negative pole ear head 6 under the condition that keeps the distance between anodal ear root 5 and the negative pole ear root 7 and the distance between the tradition anodal negative pole ear the same from this to avoid utmost point ear too closely to lead to electric core short circuit.
Simultaneously, this scheme is still selected to set up the width for being equal to the same size electric core utmost point ear with the width of utmost point ear head, and the width of utmost point ear root is greater than the width of traditional same size electric core utmost point ear, can reduce utmost point ear and mass flow body welding resistance from this to a certain extent, and then promotes the electrical property of electric core, has reduced utmost point ear and mass flow body rosin joint's probability.
Specifically, in this embodiment, the center line of the positive tab head portion 4 along the length direction thereof and the center line of the positive tab root portion 5 along the length direction thereof overlap each other; the center line of the negative electrode tab portion 6 in the length direction thereof and the center line of the negative electrode tab root portion 7 in the length direction thereof overlap each other. The positive pole utmost point ear with the anodal mass flow body 2 is connected through laser welding, the negative pole utmost point ear with the negative pole mass flow body 3 is connected through laser welding.
Example two:
as shown in fig. 2, this embodiment provides a lithium ion battery cell, including cell shell 1 and in the positive pole and the negative pole that cell shell 1 homonymy extends to the outside, the positive pole includes anodal utmost point ear and anodal mass flow body 2, the negative pole includes negative pole utmost point ear and negative mass flow body 3, anodal utmost point ear have with anodal ear root 5 that anodal mass flow body 2 connects and keep away from anodal ear portion 4 of anodal mass flow body 2, the negative pole utmost point ear have with negative pole ear root 7 that negative mass flow body 3 connects and keep away from the negative pole ear portion 6 of negative mass flow body 3, the width of anodal ear portion 4 is less than the width of anodal ear root 5, the width of negative pole ear portion 6 is less than the width of negative pole ear root 7.
The difference between the first embodiment and the first embodiment lies in that the connection positions of the tab head and the tab root are different, in this embodiment, the tab root 5 has a first side edge of the tab far away from the negative tab, and the tab head 4 has a second side edge of the tab far away from the negative tab; the first side edge of the positive lug is overlapped with the second side edge of the positive lug. The negative electrode tab root part 7 is provided with a negative electrode tab first side edge far away from one side of the positive electrode tab, and the negative electrode tab head part 6 is provided with a negative electrode tab second side edge far away from one side of the positive electrode tab; the first side edge of the negative electrode lug is overlapped with the second side edge of the negative electrode lug.
Through the arrangement, the distance between the positive electrode tab part 4 and the negative electrode tab part 6 can be maximized, and short circuit caused by too close tabs can be avoided to the maximum extent.
Meanwhile, in the embodiment, along the width direction of the cell casing 1, the width of the positive electrode tab root portion 5 is smaller than the width of the positive electrode current collector 2, and the width of the negative electrode tab root portion 7 is smaller than the width of the negative electrode current collector 3.
Example three:
as shown in fig. 3, this embodiment provides a lithium ion battery cell, including cell shell 1 and in the positive pole and the negative pole that cell shell 1 homonymy extends to the outside, the positive pole includes anodal utmost point ear and anodal mass flow body 2, the negative pole includes negative pole utmost point ear and negative mass flow body 3, anodal utmost point ear have with anodal ear root 5 that anodal mass flow body 2 connects and keep away from anodal ear portion 4 of anodal mass flow body 2, the negative pole utmost point ear have with negative pole ear root 7 that negative mass flow body 3 connects and keep away from the negative pole ear portion 6 of negative mass flow body 3, the width of anodal ear portion 4 is less than the width of anodal ear root 5, the width of negative pole ear portion 6 is less than the width of negative pole ear root 7.
In this embodiment, a positive electrode fusing groove 8 is provided at a position where the positive electrode tab portion 4 is connected to the positive electrode tab root portion 5, a negative electrode fusing groove 9 is provided at a position where the negative electrode tab portion 6 is connected to the negative electrode tab root portion 7, and the positive electrode fusing groove 8 and the negative electrode fusing groove 9 have the same size.
Through setting up the fusing groove, when the limiting current passes through, fusing takes place in fusing groove department to prevent the continuation of heavy current to pass through, played the effect that the battery was turn-offed safely, improved the security performance of battery.
Example four:
as shown in fig. 4, this embodiment provides a lithium ion battery cell, including cell casing 1 and in the positive pole and the negative pole that cell casing 1 homonymy extends to the outside, the positive pole includes anodal utmost point ear and anodal mass flow body 2, the negative pole includes negative pole utmost point ear and negative mass flow body 3, its characterized in that, anodal utmost point ear have with anodal ear root 5 that anodal mass flow body 2 is connected and keep away from anodal ear head portion 4 of anodal mass flow body 2, negative pole utmost point ear have with negative pole ear root portion 7 that negative mass flow body 3 is connected and keep away from negative pole ear head portion 6 of negative mass flow body 3, anodal ear head portion 4's width is less than anodal ear root portion 5's width, negative pole ear head portion 6's width is less than negative pole ear root portion 7's width.
In a further preferred embodiment, in the present embodiment, the positive tab portion 4 is provided with a positive tab insulating sleeve 10, and the negative tab portion 6 is provided with a negative tab insulating sleeve 11. Through setting up anodal ear insulating cover 10 and negative pole ear insulating cover 11, adopt the insulating cover that corresponds to carry out insulating cladding to utmost point ear head in the in-process of electric core transportation, avoided utmost point ear head to be contacted each other by extrusion deformation and cause the short circuit.
Preferably, the length of the positive tab insulating sleeve 10 is greater than the length of the positive tab portion 4, and the length of the negative tab insulating sleeve 11 is greater than the length of the negative tab portion 6. The positive tab part 4 and the negative tab part 6 can be completely coated by the scheme, so that the insulation effect is more ideal.
Example five:
meanwhile, the scheme also provides a lithium ion battery, which comprises a shell and an electric core accommodated in the shell, wherein the electric core is the lithium ion battery electric core.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. The utility model provides a lithium ion battery cell, include the electric core casing and in the anodal and negative pole that the electric core casing homonymy extends to the outside, anodal including anodal utmost point ear and the anodal mass flow body, the negative pole includes negative pole utmost point ear and the negative pole mass flow body, a serial communication port, anodal utmost point ear have with anodal ear root that the anodal mass flow body is connected and keep away from anodal ear portion of the anodal mass flow body, negative pole utmost point ear have with negative pole ear root that the negative pole mass flow body is connected and keep away from the negative pole ear portion of the negative pole mass flow body, the width of anodal ear portion is less than the width of anodal ear root, the width of negative pole ear portion is less than.
2. The lithium ion battery cell of claim 1, wherein a center line of the head portion of the positive tab along the length direction thereof and a center line of the root portion of the positive tab along the length direction thereof overlap each other; the center line of the negative electrode tab part along the length direction of the negative electrode tab part and the center line of the negative electrode tab root part along the length direction of the negative electrode tab part are mutually overlapped.
3. The lithium ion battery cell of claim 1, wherein the root portion of the positive tab has a first side of the positive tab distal from the side of the negative tab, and the head portion of the positive tab has a second side of the positive tab distal from the side of the negative tab; the first side edge of the positive lug is overlapped with the second side edge of the positive lug.
4. The lithium ion battery cell of claim 1, wherein the negative tab root portion has a negative tab first side distal from the positive tab, and the negative tab head portion has a negative tab second side distal from the positive tab; the first side edge of the negative electrode lug is overlapped with the second side edge of the negative electrode lug.
5. The lithium ion battery cell of claim 4, wherein the width of the root of the positive tab is less than the width of the positive current collector and the width of the root of the negative tab is less than the width of the negative current collector along the width of the cell casing.
6. The lithium ion battery cell of claim 1, wherein the positive electrode tab is connected to the positive electrode current collector by laser welding, and the negative electrode tab is connected to the negative electrode current collector by laser welding.
7. The lithium ion battery cell of claim 1, wherein a positive electrode fusing groove is formed at a position where the positive electrode tab portion is connected to the root portion of the positive electrode tab, a negative electrode fusing groove is formed at a position where the negative electrode tab portion is connected to the root portion of the negative electrode tab, and the positive electrode fusing groove and the negative electrode fusing groove have the same size.
8. The lithium ion battery cell of claim 1, wherein the positive tab portion is provided with a positive tab insulating sleeve and the negative tab portion is provided with a negative tab insulating sleeve.
9. The lithium ion battery cell of claim 8, wherein the length of the positive tab insulating sleeve is greater than the length of the positive tab portion, and the length of the negative tab insulating sleeve is greater than the length of the negative tab portion.
10. A lithium ion battery comprising a housing, a cell contained in the housing, the cell being the lithium ion battery cell of any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289657.5U CN211125880U (en) | 2019-12-18 | 2019-12-18 | Lithium ion battery cell and lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289657.5U CN211125880U (en) | 2019-12-18 | 2019-12-18 | Lithium ion battery cell and lithium ion battery |
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| CN211125880U true CN211125880U (en) | 2020-07-28 |
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| CN201922289657.5U Active CN211125880U (en) | 2019-12-18 | 2019-12-18 | Lithium ion battery cell and lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690550A (en) * | 2021-07-14 | 2021-11-23 | 东莞新能源科技有限公司 | Battery cell, battery and electric equipment |
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- 2019-12-18 CN CN201922289657.5U patent/CN211125880U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690550A (en) * | 2021-07-14 | 2021-11-23 | 东莞新能源科技有限公司 | Battery cell, battery and electric equipment |
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