CN213401443U - Laminate polymer battery core utmost point ear and laminate polymer battery - Google Patents
Laminate polymer battery core utmost point ear and laminate polymer battery Download PDFInfo
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- CN213401443U CN213401443U CN202022322820.6U CN202022322820U CN213401443U CN 213401443 U CN213401443 U CN 213401443U CN 202022322820 U CN202022322820 U CN 202022322820U CN 213401443 U CN213401443 U CN 213401443U
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- utmost point
- point ear
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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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Abstract
The utility model provides a soft-packaged electrical core utmost point ear and soft-packaged battery, glue including sheetmetal and utmost point ear, utmost point ear glue the cladding and be in on the sheetmetal, the sheetmetal both sides quilt the terminal portion that the cladding was glued to utmost point ear is the blank pressing structure, the blank pressing structure is the inclined plane shape, the one end that the sheetmetal middle part was kept away from to the blank pressing structure is equipped with the terminal surface, be equipped with the fluting on the terminal surface, wherein the notched width is less than the cladding on the sheetmetal the width that utmost point ear was glued. The utility model discloses a set up the fluting in the blank pressing structure department of the sheetmetal of laminate polymer battery utmost point ear, at utmost point ear glue and the compound in-process of sheetmetal hot pressing, utmost point ear glue under the molten condition is to the infiltration of the terminal surface fluting department of blank pressing structure for utmost point ear glue and the terminal surface of sheetmetal blank pressing structure form the interlock, have increased the tip of the sheetmetal of utmost point ear and the encapsulation intensity that utmost point ear was glued, reduce the risk that electric core electrolyte was revealed.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery, concretely relates to soft-packaged electrical core utmost point ear and soft-packaged battery.
Background
After the battery core of the soft package battery is packaged, when the module and the PACK are carried out, or in the using process of a whole vehicle, the electrolyte leakage of the battery core is fatal safety problem, major safety accidents happen once the electrolyte leakage happens, and the consequences are hard to imagine. The battery core of the soft package battery is connected with the inside and the outside of the battery core by a pair of positive and negative electrode lugs which penetrate through an aluminum-plastic film packaging layer, and whether the packaging of the positive and negative electrode lugs is reliable or not is related to the safety of the whole battery core. The current soft package battery cell tab used in the market is generally formed by hot-pressing and compounding a metal sheet and a tab adhesive, the current carrying capacity borne by the tab is increased along with the increase of the cell, so that the tab thickening is a good direction, the thickness of the tab is generally 0.2-0.5mm at present, the thickening of the tab means that the end face fall jointed with the tab adhesive is larger than the thickness of the tab adhesive, the packaging reliability is poor, the leakage risk of electrolyte is increased, in order to solve the problem of large end face fall, in the tab production process, the edge pressing treatment is carried out on two sides of the tab to reduce the end face fall, and even if the end face fall is large, the leakage risk of the electrolyte still exists.
Consequently, to the problem that electrolyte was revealed to laminate polymer battery's electric core utmost point ear terminal surface, carry out configuration optimization to laminate polymer battery's utmost point ear terminal surface, promote the encapsulation intensity of laminate polymer battery electric core utmost point ear terminal surface linking department, reduce the risk that electric core electrolyte was revealed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem among the prior art, the utility model provides a laminate polymer battery core utmost point ear and laminate polymer battery sets up the fluting through the blank pressing structure department at the sheetmetal of laminate polymer battery utmost point ear for utmost point ear glue and sheetmetal blank pressing structure's terminal surface forms the interlock, has increased the tip of the sheetmetal of utmost point ear and the encapsulation intensity that utmost point ear glued, reduces the risk that electric core electrolyte was revealed.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
the utility model provides a soft-packaged electrical core utmost point ear, glue including sheetmetal and utmost point ear, utmost point ear glue the cladding and be in on the sheetmetal, the sheetmetal both sides quilt the terminal portion that the cladding was glued to utmost point ear is the blank pressing structure, the blank pressing structure is the inclined plane shape, the one end that the sheetmetal middle part was kept away from to the blank pressing structure is equipped with the terminal surface, be equipped with the fluting on the terminal surface, at utmost point ear glue and the compound in-process of sheetmetal hot pressing, infiltration in can the fluting on the sheetmetal blank pressing structure terminal surface is glued to utmost point ear under the molten condition. And the end face of the edge pressing structure is provided with a slot, and the tab glue in a molten state permeates to the slot of the end face, so that the tab glue and the end face of the metal sheet edge pressing structure are occluded, and the aim of increasing the packaging strength is fulfilled.
As an optional implementation manner, in the utility model provides a soft-packaged electrical core utmost point ear, grooved width is less than the cladding on the metal sheet the width that utmost point ear was glued.
As an optional implementation manner, in the utility model provides a soft-packaged electrical core tab, grooved shape is one of sphere, arc, cylindricality, trapezoidal, square or V-shaped.
As an optional implementation manner, in the utility model provides a soft-packaged electrical core utmost point ear, the blank pressing structure is by the sheetmetal tip to the sheetmetal middle thickness increase gradually and the inclined plane shape of upper and lower surface symmetry.
As an optional implementation mode, in the utility model provides a soft-packaged electrical core utmost point ear, contained angle between two inclined planes that blank pressing structure formed is 25 ~ 35 degrees.
As an optional implementation mode, in the utility model provides an in the soft-packaged electrical core utmost point ear, grooved quantity is for every structural setting of blank pressing more than or equal to 1.
The utility model discloses the second aspect provides a laminate polymer battery, laminate polymer battery includes foretell laminate polymer battery core utmost point ear.
As an optional implementation mode, in the utility model provides an in the laminate polymer battery, laminate polymer battery core utmost point ear does laminate polymer battery's anodal utmost point ear and/or negative pole utmost point ear.
The working principle is as follows:
under the condition that the lug is thickened, the section of the metal sheet of the lug is provided with the blank holder, the problem that the end surface drop of the connection of the metal sheet and the lug glue is larger than the thickness of the lug glue can be solved, at the moment, the end surface of the blank holder is provided with the slot, and in the process of hot-pressing and compounding of the lug glue and the metal sheet, the lug glue in a melting state permeates to the slot of the end surface of the blank holder structure, so that the lug glue and the end surface of the blank holder structure of the metal sheet are occluded, the adhesive force of the lug glue on the end surface of the lug metal sheet is increased, and the purpose.
The utility model discloses beneficial effect as follows:
the utility model discloses a soft-packaged battery core utmost point ear sets up the fluting on the terminal surface of the blank pressing structure of the sheetmetal of cladding is glued to utmost point ear, after utmost point ear runs through the plastic-aluminum membrane encapsulation layer, at utmost point ear glue and the compound in-process of sheetmetal hot pressing, utmost point ear glue under the molten condition is to the infiltration of the terminal surface fluting department of blank pressing structure for utmost point ear glue and the terminal surface of sheetmetal blank pressing structure form the interlock, promote the sheetmetal tip of the utmost point ear that is equipped with the blank pressing structure of soft-packaged battery and the encapsulation intensity that utmost point ear was glued, reduce the risk that electric core electrolyte was revealed.
Drawings
Fig. 1 is a schematic view of a tab structure disclosed by the present invention;
fig. 2 is a schematic view of a cross-sectional structure of a tab disclosed by the present invention;
fig. 3 is a schematic diagram of slotting disclosed by the present invention;
the above reference numerals:
1. a metal sheet; 2. gluing a tab; 3. a round stick;
11. an end portion; 12. a blank pressing structure; 13. an end face; 14. and (4) slotting.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present 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.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means 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 present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the prior art, after the thickness of the metal sheet of the tab is increased, the edge pressing treatment is carried out on the end face formed by compounding the metal sheet and tab adhesive, but the electrolyte leakage condition still occurs, the packaging strength between the metal sheet and the tab adhesive cannot meet the service life of a battery cell, and the danger of electrolyte leakage easily occurs in the later-stage use process.
In order to solve the above problem, this embodiment provides a soft-packaged electrical core utmost point ear on the one hand.
As shown in fig. 1-2, the present embodiment provides a soft package battery core tab, including a metal sheet 1 and a tab glue 2, the tab glue 2 is coated on the metal sheet 1, end portions 11 of two sides of the metal sheet 1, which are coated by the tab glue 2, are blank pressing structures 12, wherein the blank pressing structures 12 are in an inclined plane shape, one end of the blank pressing structure 12, which is far away from the middle portion of the metal sheet 1, is provided with an end face 13, the end face 13 is provided with a slot 14, and in the process of hot-pressing and compounding the tab glue 2 and the metal sheet 1, the tab glue 2 in a molten state can permeate into the slot 14 on the end face 13 of the blank pressing structure 12 of.
Preferably, the edge pressing structures 12 are inclined planes with symmetrical upper and lower surfaces, and the thickness of the inclined planes gradually increases from the end parts of the metal sheet 1 to the middle part of the metal sheet 1, and the included angle between the two inclined planes formed by the edge pressing structures 12 is 15-20 degrees.
In the specific implementation process, the tab glue 2 is coated on the metal sheet 1, the end 11 of the metal sheet 1 coated with the tab glue 2 is provided with the edge pressing structure 12, in some embodiments, since the metal sheet 1 is thickened and has a thickness of about 0.2-0.5mm, the edge pressing structure can be a single-side inclined plane structure or a double-side inclined plane structure as long as the edge pressing of the inclined plane structure with a large end surface drop of the metal sheet 1 connected with the tab glue 2 can be realized, in this embodiment, the edge pressing structure 12 is an inclined plane shape in which the thickness gradually increases towards the middle of the metal sheet 1 and the upper and lower surfaces are symmetrical, that is, the cross section of the edge pressing structure 12 is an isosceles triangle or isosceles trapezoid structure, and the included angle formed between the two inclined planes is about 25-35 degrees, if the cross section is a triangle structure, an end surface is arranged at the vertex angle, if the trapezoid shape is adopted, the trapezoid shape is provided with an end face, and then an inward slot 14 is arranged on the end face.
Preferably, the width of the slot 14 is smaller than the width of the tab glue 2 coated on the metal sheet 1, where the width represents the thickness of the tab glue coated on the metal sheet, and in the specific implementation process, the width of the slot 14 is smaller than the thickness of the tab glue 2 coated on the metal sheet 1, so as to prevent that the end surface drop of the connection between the tab glue 2 and the metal sheet 1 is too large due to the too large slot 14, so that the packaging reliability is reduced, and the electrolyte leakage risk is increased. The depth of the slot 14 is not limited herein.
Preferably, the shape of the slots 14 is one of spherical, arc, cylindrical, trapezoidal, square or V-shaped, and the number of the slots 14 is more than or equal to 1 for each edge pressing structure 12.
In one embodiment, the shape of the slot 14 is not limited and may be one of spherical, arcuate, cylindrical, trapezoidal, square, or V-shaped, or other suitable shapes. In the present embodiment, the slot 14 is arcuate in shape.
In the specific implementation process, the thickness of the tab metal sheet 1 is greater than or equal to 0.2mm, when the tab metal sheet is thin, after edge pressing, the width of the section of the edge pressing structure 12 is small, therefore, the number of the slots 14 arranged on each edge pressing structure 12 can be small, for example, 1, when the tab metal sheet is thickened, the width of the section of the edge pressing structure 12 is increased accordingly after edge pressing, at the moment, the number of the slots 14 arranged on each edge pressing structure 12 can be increased properly, for example, is greater than 1, so as to increase the adhesive force between tab glue and the metal sheet, and the specific number is set according to the thickness of the metal sheet.
The embodiment second aspect provides a laminate polymer battery, including foretell utmost point ear, electrolyte, diaphragm and plastic-aluminum shell, utmost point ear includes anodal utmost point ear and negative pole utmost point ear, and anodal utmost point ear and negative pole utmost point ear are the utmost point ear including above-mentioned structure.
The third aspect of the present embodiment provides a production method for slotting an end of a sheet metal of a tab of a soft package battery, the tab after surface treatment is cut and then enters a blank pressing process, as shown in fig. 3, a round rod 3 is used for performing blank pressing, at the same time, a slot 14 which is a little shorter than the tab glue width is cut at the end face position of the blank pressing structure 12, and meanwhile, an adding device is noticed to absorb metal scraps brought by the slot 14 to prevent the metal scraps from entering the tab glue, and the tab after the slot 14 is completed continues a conventional production flow.
Use the utility model discloses the utmost point ear of preparation encapsulates with not setting up grooved utmost point ear, tests the utmost point ear glue peeling force of two utmost point ear samples, and the structure is shown as table 1, and peeling force promotes more than 20%.
TABLE 1
| Kind of sample | 1 | 2 | 3 | 4 | 5 | 6 | Average |
| Tab without open slot (N) | 45.2 | 42.3 | 43.4 | 41.2 | 38.9 | 40.7 | 42.0 |
| Open slot of pole ear belt (N) | 49.1 | 53.7 | 50.9 | 49.2 | 52.2 | 49.8 | 50.8 |
The working principle of the utility model is as follows:
under the condition that the lug is thickened, the section of the metal sheet of the lug is provided with the blank holder, the problem that the end surface drop of the connection of the metal sheet and the lug glue is larger than the thickness of the lug glue can be solved, at the moment, the end surface of the blank holder is provided with the slot, and in the process of hot-pressing and compounding of the lug glue and the metal sheet, the lug glue in a melting state permeates to the slot of the end surface of the blank holder structure, so that the lug glue and the end surface of the blank holder structure of the metal sheet are occluded, the adhesive force of the lug glue on the end surface of the lug metal sheet is increased, and the purpose.
The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments disclosed herein. To the utility model belongs to the field of the ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. The utility model provides a soft-packaged electrical core utmost point ear, its characterized in that glues including sheetmetal and utmost point ear, utmost point ear glue the cladding is in on the sheetmetal, the sheetmetal both sides quilt the terminal portion that the cladding was glued to utmost point ear is the blank pressing structure, the blank pressing structure is the inclined plane shape, the one end that the sheetmetal middle part was kept away from to the blank pressing structure is equipped with the terminal surface, be equipped with the fluting on the terminal surface, at utmost point ear glue and sheetmetal hot pressing complex in-process, the utmost point ear glue under the molten condition can be to infiltration in the fluting on the sheetmetal blank pressing structure.
2. The soft-package cell tab of claim 1, wherein the width of the slot is smaller than the width of the tab adhesive coated on the metal sheet.
3. The soft-packaged cell tab of claim 1 or 2, wherein the shape of the slot is one of spherical, arc, cylindrical, trapezoidal, square, or V-shaped.
4. The soft-package cell tab of claim 1, wherein the edge pressing structure is in the shape of an inclined plane with a symmetrical upper surface and a symmetrical lower surface, and the thickness of the edge pressing structure gradually increases from the end of the metal sheet to the middle of the metal sheet.
5. The soft-package battery cell tab according to claim 4, wherein an included angle between two inclined planes formed by the edge pressing structures is 25-35 degrees.
6. The soft-package battery cell tab according to claim 1, wherein the number of the slots is more than or equal to 1 for each edge pressing structure.
7. A soft package battery, characterized in that, the soft package battery includes the soft package battery core tab of any one of claims 1-6.
8. The flexible package battery according to claim 7, wherein the tab of the flexible package battery is a positive tab and/or a negative tab of the flexible package battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022322820.6U CN213401443U (en) | 2020-10-19 | 2020-10-19 | Laminate polymer battery core utmost point ear and laminate polymer battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022322820.6U CN213401443U (en) | 2020-10-19 | 2020-10-19 | Laminate polymer battery core utmost point ear and laminate polymer battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213401443U true CN213401443U (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022322820.6U Active CN213401443U (en) | 2020-10-19 | 2020-10-19 | Laminate polymer battery core utmost point ear and laminate polymer battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213401443U (en) |
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- 2020-10-19 CN CN202022322820.6U patent/CN213401443U/en active Active
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Effective date of registration: 20230426 Granted publication date: 20210608 |