CN214043714U - Pole piece and battery - Google Patents
Pole piece and battery Download PDFInfo
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- CN214043714U CN214043714U CN202023351387.5U CN202023351387U CN214043714U CN 214043714 U CN214043714 U CN 214043714U CN 202023351387 U CN202023351387 U CN 202023351387U CN 214043714 U CN214043714 U CN 214043714U
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- pole piece
- active material
- blank area
- material layer
- battery
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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
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Abstract
The utility model discloses a pole piece, which relates to the technical field of pole pieces, and comprises a current collector, a connecting belt and an active material layer; the number of the current collectors is more than two, and the connecting belt is positioned between the adjacent current collectors; be equipped with blank area and material covering district on the mass flow body, blank area is located the tip of mass flow body, and blank area is connected with the connecting band, and the active material layer is located the material covering district. The beneficial effects of the utility model reside in that: when the connecting belt is bent, the connecting belt is easy to bend, but the active material layer is not loaded on the connecting belt, so that the pole piece has excellent bending performance and safety.
Description
Technical Field
The utility model relates to a pole piece technical field, concretely relates to pole piece and battery.
Background
With the development of society, the portable electronic device brings great convenience in human life, and particularly with the popularization of wearable electronic devices, human life becomes more and more intelligent. For example, the noise reduction earphone can lead people to shield complex external noise and concentrate on doing things and enjoying high-quality music; for example, a massage device can relieve fatigue; intelligent dress, intelligent wrist-watch and bracelet can detect people's healthy data at any time, and intelligent dress can bring warmly in winter for everybody in addition and bring nice and cool summer.
These portable electronic devices now bring great convenience to human life. At present, the conventional lithium batteries (square, cylindrical and spherical) are mainly used as energy storage devices for the portable electronic devices, and the energy storage devices have the defect of being incapable of being bent, so that the standby time of the smart watch, the bracelet and the earphone is short.
Patent application publication No. CN112002931A discloses a method for manufacturing a flexible battery pack and the flexible battery pack manufactured thereby, by arranging adjacent monomer battery cells at intervals and filling an encapsulant in gaps between the adjacent monomer battery cells, stress generated when the battery is repeatedly bent and folded can be effectively released, thereby preventing the performance of the flexible battery pack from being attenuated after bending. However, the prior art is directed to improvements in the methods of battery preparation. If the structure of the electrode is improved, the preparation steps of the battery can be simplified, and the mass production is convenient.
The patent application with publication number CN106531952A discloses a take pole piece of utmost point ear, and this pole piece includes a current collector piece, is provided with dressing district and blank area that is connected on the current collector piece, and the edge part in blank area extends the utmost point ear district that has an organic whole to be connected, and utmost point ear district and auxiliary material zone bit are in the both sides in blank area. But the performance of the pole piece after bending is difficult to maintain in the using process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in pole piece in the prior art the back performance of buckling is difficult to keep.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
a pole piece comprises a current collector, a connecting belt and an active material layer; the number of the current collectors is more than two, and the connecting band is positioned between the adjacent current collectors;
be equipped with blank area and material covering district on the mass flow body, blank area is located the tip of mass flow body, blank area is connected with the connecting band, the active material layer is located the material covering district.
Has the advantages that: when the connecting belt is bent, the connecting belt is easy to bend, but the active material layer is not loaded on the connecting belt, so that the pole piece has excellent bending performance and safety.
The blank area that the mass flow body surface was reserved does not load active material layer, and this blank area is connected with the connecting band, can protect the active material layer of marginal portion when the pole piece encapsulation not destroyed, does not destroy the active material of edge when the battery is buckled, promotes the security of battery simultaneously, makes the battery can not take place the short circuit when buckling.
The utility model provides a when the pole piece is used for the battery, can reduce the holistic internal resistance of battery with utmost point ear lug beading in the blank area of mass flow body, promote the charge-discharge performance and the capacity of battery. The utility model provides a not set up the through-hole on the connecting band, can reduce the battery internal resistance.
Preferably, the number of the connecting bands is multiple.
Preferably, the connecting band is polygonal or any side of the connecting band is arc-shaped.
Preferably, the connecting band is in a shape of a square, a trapezoid, a diamond, a convex polygon or a concave polygon.
Preferably, the number of the current collectors is two, and the blank area and the material covering area are respectively located at two ends of the current collector.
Preferably, the current collector covers the one end in material district and is equipped with and is used for utmost point ear welded to leave white district, it is located the both ends that cover the material district respectively to leave white district and blank area.
Has the advantages that: a blank area is arranged at one end of the current collector covering area and used for welding a tab, and the second current collector covering area is not provided with the blank area, so that the size of the pole piece can be reduced.
Preferably, the number of the current collectors is greater than two, and the plurality of current collectors are distributed in an array.
Has the advantages that: can realize the crooked and folding of a plurality of directions, be particularly useful for intelligent clothing, and at crooked in-process, because the mass flow body of being connected with the connecting band is blank, can protect the active material layer of marginal portion when the pole piece encapsulation not destroyed, does not destroy the active material of edge when the battery is buckled, promotes the security of battery simultaneously, makes the battery can not take place the short circuit when buckling.
Preferably, the number of the current collectors is four, and the four current collectors are distributed in two rows and two columns.
Preferably, the number of the current collectors is twenty, and the twenty current collectors are distributed in four rows and five columns.
Preferably, the shape of the current collector is square, circular, triangular, diamond-shaped or trapezoidal.
Preferably, the pole piece comprises a positive pole piece and a negative pole piece, a current collector in the negative pole piece is a copper foil, and the active material layer is a negative active material layer; the current collector in the positive pole piece is an aluminum foil, and the active material layer is a positive active material layer.
Preferably, the blank area is provided with an active material layer.
Has the advantages that: because the thickness of copper foil is generally less than the thickness of aluminium foil, set up anodal active material layer on the blank area of positive pole piece, can protect edge part not destroyed when the encapsulation, reduce the probability of battery short circuit simultaneously.
Preferably, the size of the blank area of the positive electrode plate is smaller than that of the blank area of the negative electrode plate.
Has the advantages that: the probability of battery short circuit is reduced.
The utility model also provides a battery of including above-mentioned pole piece.
Has the advantages that: the utility model provides a battery has excellent bending performance and security performance.
The utility model has the advantages that: the connection tape is easily bent when being bent, but has excellent bending performance and safety because the connection tape is not loaded with the active material layer.
The blank area that the mass flow body surface was reserved does not load active material layer, and this blank area is connected with the connecting band, can protect the active material layer of marginal portion when the pole piece encapsulation not destroyed, does not destroy the active material of edge when the battery is buckled, promotes the security of battery simultaneously, makes the battery can not take place the short circuit when buckling.
The utility model provides a when the pole piece is used for the battery, can reduce the holistic internal resistance of battery with utmost point ear lug beading in the blank area of mass flow body, promote the charge-discharge performance and the capacity of battery.
A blank area is arranged at one end of the current collector covering area and used for welding a tab, and the second current collector covering area is not provided with the blank area, so that the size of the pole piece can be reduced.
Can realize the crooked and folding of a plurality of directions, be particularly useful for intelligent clothing, and at crooked in-process, because the mass flow body of being connected with the connecting band is blank, can protect the active material layer of marginal portion when the pole piece encapsulation not destroyed, does not destroy the active material of edge when the battery is buckled, promotes the security of battery simultaneously, makes the battery can not take place the short circuit when buckling.
Drawings
Fig. 1 is a schematic structural diagram of a pole piece in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a pole piece in embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a pole piece in embodiment 3 of the present invention;
fig. 4 is a schematic structural view of the positive electrode plate in embodiment 5 of the present invention;
fig. 5 is a schematic structural view of a negative electrode plate in embodiment 5 of the present invention;
fig. 6 is a schematic structural diagram of a pole piece in embodiment 6 of the present invention;
fig. 7 is a schematic structural view of a pole piece in embodiment 7 of the present invention;
fig. 8 is a schematic structural view of a pole piece in embodiment 8 of the present invention;
fig. 9 is a schematic structural view of a pole piece in embodiment 9 of the present invention;
fig. 10 is a schematic structural view of a pole piece in embodiment 10 of the present invention;
in the figure: a current collector 11; a first current collector 111; a second current collector 112; a blank area 12; a first blank area 121; a second blank area 122; a material-covering region 13; a first cladding region 131; a second material coverage area 132; a connecting band 14; leaving a white region 15.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are 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 efforts belong to the protection scope of the present invention.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
Example 1
A pole piece, as shown in fig. 1, includes a current collector 11, a connection band 14, and an active material layer (not shown), where the current collector 11 is provided with a blank area 12 and a material-covering area 13, and the number of the current collectors 11 in this embodiment is two.
The current collector 11 includes a first current collector 111 and a second current collector 112, in this embodiment, the shapes of the first current collector 111 and the second current collector 112 are both square but not limited to square, or circular, triangular, diamond-shaped, or trapezoidal, the connection band 14 is located between the first current collector 111 and the second current collector 112, and in order to reduce the number of processes, the connection band 14 is integrally formed with the first current collector 111 and the second current collector 112 in this embodiment.
Two ends of the first current collector 111 are respectively provided with a first blank area 121 and a first material covering area 131, the first blank area 121 is rectangular, the first material covering area 131 is square, the size of the first blank area 121 is smaller than that of the first material covering area 131, and the first blank area 121 is connected with the connecting band 14.
The two ends of the second current collector 112 are respectively provided with a second blank area 122 and a second material covering area 132, the second blank area 122 is rectangular, the second material covering area 132 is square, the size of the second blank area 122 is smaller than that of the second material covering area 132, and the second blank area 122 is connected with the connecting band 14. In this embodiment, the first blank area 121, the connecting band 14 and the second blank area 122 are H-shaped, and the connecting band 14 is square.
Active material layers are respectively coated on the first and second coating regions 131 and 132.
In order to facilitate the tab welding, a blank area 15 is disposed at one end of the first material covering area 131 or one end of the second material covering area 132, the blank area 15 and the first current collector 111 or the second current collector 112 are integrally formed, the blank area 15 and the first blank area 121 are respectively disposed at two ends of the first material covering area 131, or the blank area 15 and the second blank area 122 are respectively disposed at two ends of the second material covering area 132.
The electrode plate in this embodiment includes a positive electrode plate and a negative electrode plate, and when the first current collector 111 and the second current collector 112 are both copper foils, the active material layer is a negative active material layer, where the negative active material layer is in the prior art, and the electrode plate is the negative electrode plate at this time.
When the first current collector 111 and the second current collector 112 are both aluminum foils, the active material layer is a positive active material layer, wherein the positive active material layer is a prior art, and the pole piece is a positive pole piece.
The advantages of this embodiment are: when the connecting band 14 is bent, the connecting band 14 is easy to bend, but the connecting band 14 is not loaded with an active material layer, so that the pole piece has excellent bending performance and safety.
Example 2
This embodiment is different from embodiment 1 in that: as shown in fig. 2, the number of the current collectors 11 is greater than two, and the plurality of current collectors 11 are distributed in an array. The number of mass flow body 11 is four in this embodiment, and four mass flow bodies 11 are two rows and two columns and distribute.
Example 3
This embodiment is different from embodiment 2 in that: as shown in fig. 3, the number of current collectors 11 is twenty, and the twenty current collectors 11 are distributed in four rows and five columns.
The advantages of this embodiment are: can realize the bending and folding of a plurality of directions, be particularly useful for intelligent clothing, and at crooked in-process, because the mass flow body 11 of being connected with connecting band 14 is blank 12, can protect the active material layer of marginal portion when the pole piece encapsulation not destroyed, does not destroy the active material of edge when the battery is buckled, promotes the security of battery simultaneously, makes the battery can not take place the short circuit when buckling.
Example 4
The present embodiment differs from the above embodiments in that: the blank area of the positive pole piece is provided with a positive active material layer.
The advantages of this embodiment are: because the thickness of copper foil is generally less than the thickness of aluminium foil, set up anodal active material layer on the blank area of positive pole piece, can protect edge part not destroyed when the encapsulation, reduce the probability of battery short circuit simultaneously.
Example 5
The present embodiment differs from the above embodiments in that: as shown in fig. 4 and 5, fig. 4 is a positive electrode plate, fig. 5 is a negative electrode plate, and the size of the blank area of the positive electrode plate is smaller than that of the blank area of the negative electrode plate.
The advantages of this embodiment are: the probability of a short circuit of the battery can be reduced.
Example 6
This embodiment is different from embodiment 1 in that: as shown in fig. 6, the first blank area 121, the connecting band 14 and the second blank area 122 are square.
Example 7
This embodiment is different from embodiment 1 in that: as shown in fig. 7, the connecting band 14 has a trapezoidal shape. The shape and number of the connecting bands 14 may be arbitrarily combined.
Example 8
This embodiment is different from embodiment 1 in that: as shown in fig. 8, the number of the connecting bands 14 is plural, and the number of the connecting bands 14 in this embodiment is 2, but not limited to two. The shape and number of the connecting bands 14 may be arbitrarily combined.
Example 9
This embodiment is different from embodiment 1 in that: as shown in fig. 9, the connection band 14 has a dodecagon shape. The shape and number of the connecting bands 14 may be arbitrarily combined.
Example 10
This embodiment is different from embodiment 1 in that: as shown in fig. 10, the connecting band 14 is rectangular, wherein both sides of the connecting band 14 are arc-shaped, and the bending direction of the arc-shape is set according to actual requirements. The shape and number of the connecting bands 14 may be arbitrarily combined.
Example 11
This embodiment is different from embodiment 1 in that: the blank region 12 is provided with an active material layer.
Example 12
This embodiment is different from embodiment 2 in that: wherein 1 or 7 blank regions 12 are provided with an active material layer.
Example 13
The present embodiment differs from the above embodiments in that: the embodiment provides a battery, which comprises a positive pole piece, a diaphragm and a negative pole piece, wherein the positive pole piece, the diaphragm and the negative pole piece are sequentially wound or laminated, and the shape of the diaphragm corresponds to the shapes of the positive pole piece and the negative pole piece.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A pole piece, characterized by: the pole piece comprises a current collector, a connecting belt and an active material layer; the number of the current collectors is more than two, and the connecting band is positioned between the adjacent current collectors;
be equipped with blank area and material covering district on the mass flow body, blank area is located the tip of mass flow body, blank area is connected with the connecting band, the active material layer is located the material covering district.
2. The pole piece of claim 1, wherein: the number of mass flow body is two, blank area and material covering district are located the both ends of mass flow body respectively.
3. The pole piece of claim 1, wherein: one end in the mass flow body material covering area is equipped with and is used for utmost point ear welded to leave white district, it is located the both ends in material covering area respectively with blank district to leave white district.
4. The pole piece of claim 1, wherein: the number of the current collectors is more than two, and the current collectors are distributed in an array.
5. The pole piece of any one of claims 1 to 4, wherein: the number of the connecting bands is multiple.
6. The pole piece of claim 5, wherein: the connecting belt is polygonal or any side of the connecting belt is arc-shaped.
7. The pole piece of claim 6, wherein: the pole pieces comprise a positive pole piece and a negative pole piece, a current collector in the negative pole piece is a copper foil, and the active material layer is a negative active material layer; the current collector in the positive pole piece is an aluminum foil, and the active material layer is a positive active material layer.
8. The pole piece of claim 1, wherein: the blank area is provided with an active material layer.
9. The pole piece of claim 7, wherein: the size of the blank area of the positive pole piece is smaller than that of the blank area of the negative pole piece.
10. A battery, characterized by: the battery includes the pole piece of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023351387.5U CN214043714U (en) | 2020-12-30 | 2020-12-30 | Pole piece and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023351387.5U CN214043714U (en) | 2020-12-30 | 2020-12-30 | Pole piece and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214043714U true CN214043714U (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023351387.5U Active CN214043714U (en) | 2020-12-30 | 2020-12-30 | Pole piece and battery |
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| CN (1) | CN214043714U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143260A1 (en) * | 2020-12-30 | 2022-07-07 | 深圳信达新能源科技有限公司 | Pole piece, battery comprising pole piece, and manufacturing methods |
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2020
- 2020-12-30 CN CN202023351387.5U patent/CN214043714U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143260A1 (en) * | 2020-12-30 | 2022-07-07 | 深圳信达新能源科技有限公司 | Pole piece, battery comprising pole piece, and manufacturing methods |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510000 room 308-a12, building 4, Edix Xiexin, 333 Longfei Avenue, huanggekeng community, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Yixin New Energy Technology Co.,Ltd. Address before: 510000 room 308-a12, building 4, Edix Xiexin, 333 Longfei Avenue, huanggekeng community, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Xinda New Energy Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |