CN217823181U - Pole piece, battery and consumer - Google Patents
Pole piece, battery and consumer Download PDFInfo
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- CN217823181U CN217823181U CN202221816096.5U CN202221816096U CN217823181U CN 217823181 U CN217823181 U CN 217823181U CN 202221816096 U CN202221816096 U CN 202221816096U CN 217823181 U CN217823181 U CN 217823181U
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- pole piece
- tab
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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 discloses a pole piece, battery and consumer, this pole piece has the first end at the end that the utmost point ear deviates from the pole piece main part, and the first end forms convergent structure, can reduce the focus of utmost point ear structure on the one hand, improves utmost point ear structural stability; on the other hand can consolidate the structure of first end, compares in traditional rectangle structure, and stability is better, can also reduce the probability of collision with the compression roller simultaneously, avoids utmost point ear to be strikeed the condition that produces the hem.
Description
Technical Field
The utility model relates to a battery structure technical field especially relates to a pole piece, battery and consumer.
Background
In the lithium battery structure, the positive electrode and the negative electrode are required to be conducted to the outside, and the pole piece is generally subjected to die cutting forming to expose the pole lug for conducting current;
in the related art, the tab is usually in a rectangular structure, and the height of the tab is required to be higher and higher as the number of winding layers of the cell substrate of the battery is increased; however, in the conventional tab structure, as the height of the tab is increased, the center of gravity is also increased, so that the top area of the tab is easy to collapse or turn over during the process of passing through a roller;
therefore, how to improve the structural stability of the tab becomes a problem that needs to be improved in the prior art.
SUMMERY OF THE UTILITY MODEL
This application aims at providing a pole piece, battery and consumer to solve the problem that how to improve the structural stability of utmost point ear.
The scheme adopted by the application to solve the technical problems is as follows:
in a first aspect, the present application provides a pole piece comprising
A pole piece main body;
the tab is positioned on one side of the pole piece main body and comprises a connecting part and a first end part, and the connecting part is connected with the pole piece main body;
the first end part is connected with one end of the connecting part, which is far away from the pole piece main body;
the width of the first end part is gradually reduced along a first direction, and the first direction is a direction in which the first end part deviates from the connecting part.
In some embodiments of the present application, at least one of both sides of the tab in a width direction is provided with a tapered edge, and the edge is one of a straight line, a broken line, and a curved line.
In some embodiments of the present application, the tab is provided with the tapered edge along both sides in the first direction.
In some embodiments of the present application, the edges of the two sides of the tab are symmetrically disposed.
In some embodiments of the present application, the edge is a curve, and the curve is concave; or the edge is a fold line, the fold line is provided with a corner structure which is convex outwards, and the included angle of the corner structure is an obtuse angle.
In some embodiments of the present application, a length of the first end portion in the first direction is smaller than a length of the connection portion in the first direction.
In some embodiments of the present application, the length H of the first end in the first direction 1 And the length H of the tab in the first direction 2 The following conditions are satisfied: h is more than 0.05 1 /H 2 < 0.5, and H 2 -H 1 ≤26mm。
In some embodiments of the present application, the length H of the first end in the second direction 3 And a length H of the connecting portion in the second direction 4 The following conditions are satisfied: h is more than 0.05 3 /H 4 Less than 0.95; wherein the second direction is perpendicular to the first direction.
In a second aspect, the present application further provides a battery including the above-mentioned pole piece.
In a third aspect, the present application also provides an electric device including the above battery.
According to the pole piece, the battery and the electric equipment, the first end part is arranged at one end, away from the pole piece main body, of the pole piece, and the first end part forms a gradually-reducing structure, so that on one hand, the center of gravity of a pole lug structure can be reduced, and the stability of the pole lug structure is improved; on the other hand can consolidate the structure of first end, compares in traditional rectangle structure, and stability is better, can also reduce the probability of collision with the compression roller simultaneously, avoids utmost point ear to be strikeed the condition that produces the hem.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art pole piece;
FIG. 2 is a cross-sectional view of a portion of the structure of FIG. 1;
fig. 3 is a schematic diagram of a pole piece structure according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of the partial structure of fig. 3 according to the present invention;
fig. 5 is a schematic view of a pole piece structure according to another embodiment of the present invention;
fig. 6 is a sectional view of the partial structure of fig. 5 according to the present invention;
fig. 7 is a schematic structural diagram of a pole piece according to another embodiment of the present invention;
fig. 8 is a partial structural sectional view of fig. 7 according to the present invention.
Description of the main element symbols:
1-pole piece main body, 2-pole ear, 21-connecting part, 22-first end part, 221-edge, a-first direction and b-second direction.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, 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 those skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that, in the lithium battery industry, finished battery cores all need to be externally guided by positive and negative electrodes, and the current collector is generally subjected to die cutting molding so as to expose the tabs for guiding current. However, the conventional tab is long in length, and as shown in fig. 1 and 2, the tab has a rectangular structure, so that the tab is unstable in structure and is easily deformed such as being folded and collapsed. The focus of utmost point ear is close to the pole piece more in the actual research in-process discovery, and its structure is more stable, and the utmost point ear is difficult more to take place to turn over to fold down to wait to warp, and this application has improved the utmost point ear based on this.
Referring to fig. 3 and 4, the main body of the present embodiment is a pole piece, and is characterized by including a pole piece main body 1; the tab 2 is positioned on one side of the pole piece main body 1, the tab 2 comprises a connecting part 21 and a first end part 22, and the connecting part 21 is connected with the pole piece main body 1; the first end part 22 is positioned at one end of the connecting part 21, which is far away from the pole piece main body 1; wherein the width of the first end portion 22 is tapered along a first direction a, which is a direction in which the first end portion 22 faces away from the connecting portion 21.
One end of the tab 2 departing from the pole piece main body 1 is provided with a first end part 22, and the first end part 22 forms a gradually-reduced structure, so that on one hand, the gravity center of the tab 2 can be reduced, and the stability of the tab 2 is improved; on the other hand can consolidate first end 22's structure, compares in traditional rectangle structure, and stability is better, can also reduce the probability of collision with the compression roller simultaneously, avoids utmost point ear 2 to be strikeed the condition that produces the hem.
It can be understood that, the width of the tab 2 is related to the flow guiding area of the tab 2, and the tapered structure is arranged on the first end portion 22 along the direction away from the pole piece, which is equivalent to arranging the tapered structure at the tail end, so that the influence on the flow guiding performance due to the width reduction of the tab 2 can be reduced as much as possible.
In some embodiments, the location where the first end portion 22 tapers is not limited to a specific location, and the location of the taper may be local to the first end portion 22 or may be integral therewith.
It should be noted that the first direction a is a direction in which the first end 22 faces away from the connecting portion 21; it is also understood that the tab 2 is provided in a long sheet structure, and the first direction a is a longitudinal direction of the tab 2.
In some embodiments of the present application, please further refer to fig. 6 and 8, at least one of two sides of the tab 2 in the width direction is provided with a tapered edge 221, and the edge 221 is one of a straight line, a broken line and a curved line.
It is understood that the shape of the connecting portion 21 is not limited in this embodiment, and the connecting portion 21 may have any shape.
It should be noted that the curve may be a continuous curve or a discontinuous curve.
In some embodiments of the present application, the tab 2 is provided with tapered edges 221 along both sides in the first direction a.
It is understood that both sides in the first direction a are both sides in the tab width direction.
In some embodiments of the present application, the edges 221 of the two sides of the tab 2 are symmetrically arranged.
In some embodiments of the present application, please refer to fig. 5 and 6, the edge 221 is a curve, and the curve is concave.
It should be understood that a concave arrangement may be understood as a curve disposed along a centerline proximate the first end 22. The concave structure can further avoid being collided so as to avoid the folding and the collapsing of the pole lug 2.
In some embodiments of the present application, please refer to fig. 7, the curve is an arc-shaped curve structure. Is convenient for production and manufacture.
In some embodiments of the present application, referring to fig. 7 and 8, the edge 221 is a fold line, and the fold line has an outwardly convex corner structure.
In some embodiments, the fold line structure is formed by connecting two fold lines, but is not limited thereto, and the fold line structure may be formed by connecting a plurality of fold lines.
In some embodiments of the present application, the included angle of the corner structure is set to an obtuse angle.
In some embodiments of the present application, the tab 2 is a sheet structure, and the thickness of the tab 2 is smaller than that of the pole piece main body 1.
More specifically, the ratio between the thickness of the tab 2 and the thickness of the pole piece body 1 is between 2 and 1.
More specifically, the thickness of the tab 2 may be set to 5 to 20 μm, and the thickness of the pole piece body 1 may be set to 50 to 200 μm.
More specifically, the thickness of the tab 2 may be set to 10 μm, and the thickness of the pole piece body 1 may be set to 100 μm.
In some embodiments of the present application, the length of the first end portion 22 in the first direction a is smaller than the length of the connection portion 21 in the first direction a. The gravity center of the tab 2 is lowered to the connecting part 21, and the stability of the whole structure is enhanced.
In some embodiments of the present application, the length H of the first end 22 in the first direction a 1 And the length H of the tab 2 in the first direction a 2 The following conditions are satisfied: h is more than 0.05 1 /H 2 < 0.5, and H 2 -H 1 ≤26mm。
It should be noted that, in this embodiment, H is 1 And H 2 The specific numerical value of (A) is not limited, and H is controlled 1 And H 2 Ratio X of 2 To control the center of gravity of the tab.
From H 1 And H 2 Can see that X is 2 The smaller the center of gravity of the tab 2, the lower X 2 The larger the center of gravity of the tab 2.
In some embodiments of the present application, the length H of the first end 22 in the second direction b 3 And the length H of the connecting portion 21 in the second direction b 4 The following conditions are satisfied: h is more than 0.05 3 /H 4 Less than 0.95; wherein the second direction b is perpendicular to the first direction a.
It should be noted that, in this embodiment, H is 3 And H 4 The specific numerical value of (A) is not limited, and H can be designed according to the specific diversion requirement 3 And H 4 The specific numerical values of (a); can also be controlled by controlling H 3 And H 4 Ratio X of 1 To control the center of gravity of the tab.
From H 3 And H 4 Can see that X is 1 The larger the center of gravity of the tab 2 is; with X 1 The smaller the center of gravity of the tab 2 is, the better the stability of the tab 2 is; .
In some embodiments, H may be set 3 /H 4 The following conditions are satisfied: h is more than 0.5 3 /H 4 Less than 0.9; under the condition that the sizes of the lugs 2 are different, the actual sizes can be further designed with gradients for simulation optimization.
In some embodiments, H may be set 1 /H 2 、H 3 /H 4 Simultaneously satisfies the following conditions: h is more than 0.05 1 /H 2 < 0.5, and H 2 -H 1 ≤26mm，0.05＜H 3 /H 4 Is less than 0.95. The gravity center of the tab 2 can be reduced, and the risk of the top of the tab collapsing is reduced; the flow guide width of the pole lug 2 can be ensured as much as possible, and the pole lug flow guide requirement of the quick-charging battery is met.
In some embodiments of the present application, there is a smooth transition connection between the first end 22 and the connecting portion 21. When the diversion particles move from the connecting part 21 to the first end part 22, smooth transition can be realized, and the condition that diversion width changes suddenly can not occur.
In a second aspect, the protective body of the present application is a battery comprising the above-described pole piece.
In some embodiments, a coating layer is provided on the pole piece body 1.
In a third aspect, the protective body of the present application is an electric device including the above battery.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, which are not described herein again.
The technical solutions provided by the embodiments of the present invention are introduced in detail, and specific examples are applied to explain the principles and embodiments of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core ideas of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be changes in the specific embodiments and the application range, and in summary, the content of the present specification should not be understood as a limitation to the present invention.
Claims (10)
1. A pole piece, comprising
A pole piece body (1);
the pole lug (2) is positioned on one side of the pole piece main body (1), the pole lug (2) comprises a connecting part (21) and a first end part (22), and the connecting part (21) is connected with the pole piece main body (1);
the first end part (22) is connected to one end, away from the pole piece main body (1), of the connecting part (21);
wherein the width of the first end portion (22) is gradually reduced along a first direction (a), and the first direction (a) is a direction in which the first end portion (22) departs from the connecting portion (21).
2. The pole piece according to claim 1, characterized in that at least one of the two sides of the tab (2) in the width direction is provided with a tapered edge (221), and the edge (221) is one of a straight line, a broken line and a curved line.
3. The pole piece according to claim 2, characterized in that the tab (2) is provided with the tapered edges (221) along both sides in the first direction (a).
4. The pole piece according to claim 3, characterized in that the edges (221) of the two sides of the tab (2) are symmetrically arranged.
5. The pole piece according to claim 2, characterized in that the edge (221) is curved and the curve is concave; or the edge (221) is a folding line which is provided with an outward convex corner structure, and the included angle of the corner structure is an obtuse angle.
6. Pole piece according to one of the claims 1 to 5, characterized in that the length of the first end section (22) in the first direction (a) is smaller than the length of the connection section (21) in the first direction (a).
7. Pole piece according to claim 6, characterized in that the length H of the first end (22) in the first direction (a) is 1 And the length H of the tab (2) in the first direction (a) 2 The following conditions are satisfied: h is more than 0.05 1 /H 2 < 0.5, and H 2 -H 1 ≤26mm。
8. The pole piece of any one of claims 1 to 5, wherein the pole piece is made of a material selected from the group consisting of aluminum, copper, nickel, and copperA length H of the first end portion (22) in the second direction (b) 3 And the length H of the connecting part (21) in the second direction (b) 4 The following conditions are satisfied: h is more than 0.05 3 /H 4 Less than 0.95; wherein the second direction (b) is perpendicular to the first direction (a).
9. A battery comprising a pole piece according to any one of claims 1 to 8.
10. An electric device comprising the battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816096.5U CN217823181U (en) | 2022-07-13 | 2022-07-13 | Pole piece, battery and consumer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816096.5U CN217823181U (en) | 2022-07-13 | 2022-07-13 | Pole piece, battery and consumer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217823181U true CN217823181U (en) | 2022-11-15 |
Family
ID=83965583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221816096.5U Active CN217823181U (en) | 2022-07-13 | 2022-07-13 | Pole piece, battery and consumer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217823181U (en) |
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2022
- 2022-07-13 CN CN202221816096.5U patent/CN217823181U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
|
| CP03 | Change of name, title or address |