CN112635810A - Pole piece pair, battery core and battery - Google Patents
Pole piece pair, battery core and battery Download PDFInfo
- Publication number
- CN112635810A CN112635810A CN202011642546.9A CN202011642546A CN112635810A CN 112635810 A CN112635810 A CN 112635810A CN 202011642546 A CN202011642546 A CN 202011642546A CN 112635810 A CN112635810 A CN 112635810A
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- Prior art keywords
- pole piece
- tail part
- battery
- pair
- edge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
According to the pole piece pair, the electric core and the battery, the first pole piece and the second pole piece are arranged, the second pole piece is provided with the tail part, the tail part of the second pole piece is gradually narrowed towards the middle position of the tail part of the second pole piece at the two side positions, so that the tail part of the second pole piece forms the chamfered edge at the two side positions, the width of the second pole piece at the tail part position can be better smaller than that of the first pole piece at the tail part position due to the chamfered edge, when the electric core is formed by winding, even if the tail part of the first pole piece is offset relative to the tail part of the second pole piece, the tail part of the first pole piece can also well wrap the tail part of the second pole piece, the situation of short circuit, lithium precipitation and fragment generation of the wound electric core can be reduced, and the stability and the safety of the battery are greatly improved.
Description
Technical Field
The invention relates to the technical field of pole pieces, in particular to a pole piece pair, a battery core and a battery.
Background
Along with the popularization of electronic devices, batteries are also born, and the technology of batteries is continuously pushed out. If the battery is to realize charging and discharging, the battery must include electric core, and electric core roughly can divide into coiling formula electric core and lamination formula electric core according to the division of kind, but no matter coiling formula electric core or lamination formula electric core, they all comprise pole piece and utmost point ear, and utmost point ear welding is on the pole piece, and utmost point ear is as the link that external electronic equipment was connected to the battery.
Taking a battery of a winding type battery cell as an example, the winding type battery cell comprises a positive plate, a first diaphragm, a negative plate and a second diaphragm, wherein the positive plate, the first diaphragm, the negative plate and the second diaphragm are sequentially stacked and wound to form the battery cell. However, in the winding process, especially in the ending stage of the tails of the positive and negative electrode plates, the situation of tail flick easily occurs to the battery cell, and the tail flick is that the tail of the positive electrode plate is shifted relative to the tail of the negative electrode plate, so that the tail of the negative electrode plate cannot wrap the tail of the positive electrode plate.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a pole piece pair, a battery cell and a battery, wherein the tail part of the pole piece pair can be prevented from drifting when the battery cell is formed by winding.
The purpose of the invention is realized by the following technical scheme:
a pole piece pair comprising:
a first pole piece having a tail; and
the total width of the second pole piece is smaller than that of the first pole piece, the second pole piece is provided with a tail portion, and the tail portion is gradually narrowed towards the middle position of the tail portion at the positions of two sides, so that the tail portion forms chamfered edges at the positions of two sides.
In one embodiment, the first pole piece is a positive pole piece, and the second pole piece is a negative pole piece.
In one embodiment, the first pole piece is a negative pole piece, and the second pole piece is a positive pole piece.
In one embodiment, the maximum perpendicular distance from one of the chamfered edges to the length edge of the first pole piece is in the range of [0.5mm, 1.5mm ].
In one embodiment, the maximum perpendicular distance range from the two chamfered edges to the length edge of the first pole piece is [0.5mm, 1.5mm ].
In one embodiment, the maximum perpendicular distance from one of the chamfered edges to the length edge of the first pole piece is equal to one half of the total width of the second pole piece.
In one embodiment, the maximum perpendicular distance from the two chamfered edges to the length edge of the first pole piece is equal to one half of the total width of the second pole piece.
An electric core, comprising the above pole piece pair
A battery comprises the battery core.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the pole piece pair, the electric core and the battery, the first pole piece and the second pole piece are arranged, the second pole piece is provided with the tail part, the tail part of the second pole piece is gradually narrowed towards the middle position of the tail part of the second pole piece at the two side positions, so that the tail part of the second pole piece forms the chamfered edge at the two side positions, the width of the second pole piece at the tail part position can be better smaller than that of the first pole piece at the tail part position due to the chamfered edge, when the electric core is formed by winding, even if the tail part of the first pole piece is offset relative to the tail part of the second pole piece, the tail part of the first pole piece can also well wrap the tail part of the second pole piece, the situation of short circuit, lithium precipitation and fragment generation of the wound electric core can be reduced, and the stability and the safety of the battery are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a pole piece pair using asymmetric narrowing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a pair of pole pieces using symmetric narrowing according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, a pole piece pair 10 includes a first pole piece 100 and a second pole piece 200.
In this way, it should be noted that the first pole piece 100 and the second pole piece 200 are important components of the battery cell, and play roles of storing and outputting electric energy.
Referring to fig. 1 and 2, the first pole piece 100 has a tail portion 110.
Referring to fig. 1 and fig. 2, the total width of the second pole piece 200 is smaller than the total width of the first pole piece 100, the second pole piece 200 has a tail portion 210, and the tail portion 210 is gradually narrowed toward the middle of the tail portion 210 at two side positions, so that the tail portion 210 forms a chamfered edge 211 at two side positions.
Thus, it should be noted that, because the second pole piece 200 has the tail portion 210, and the tail portion 210 of the second pole piece 200 is gradually narrowed toward the middle position of the tail portion 210 of the second pole piece 200 at the two side positions, so that the tail portion 210 of the second pole piece 200 forms the chamfered edge 211 at the two side positions, the chamfered edge 211 can well make the width of the second pole piece 200 at the tail portion 210 smaller than that of the first pole piece 100 at the tail portion 110, when a battery cell is formed by winding, even if the tail portion 110 of the first pole piece 100 is offset from the tail portion 210 of the second pole piece 200, the tail portion 110 of the first pole piece 100 can well wrap the tail portion 210 of the second pole piece 200, so that the wound battery cell can reduce the situations of short circuit, lithium deposition and fragment, and greatly improve the stability and safety of the battery.
Further, referring to fig. 1 and fig. 2 together, in one embodiment, the first tab 100 is a positive tab, and the second tab 200 is a negative tab.
Further, referring to fig. 1 and fig. 2 together, in one embodiment, the first tab 100 is a negative tab, and the second tab 200 is a positive tab.
Further, referring to fig. 1 and 2, in one embodiment, the maximum perpendicular distance from one of the chamfered edges 211 to the length edge of the first pole piece 100 is [0.5mm, 1.5mm ].
Thus, it should BE noted that fig. 1 shows a schematic structural diagram of the pole piece pair 10 adopting asymmetric narrowing, fig. 2 shows a schematic structural diagram of the pole piece pair 10 adopting symmetric narrowing, the second pole piece 200 of fig. 1 and 2 has two chamfered edges, one is an AB edge, the other is a CD edge, the first pole piece 100 also has two length edges, one is an HI edge, the other is a JK edge, the maximum vertical distance range from one chamfered edge 211 to the length edge of the first pole piece 100 is [0.5mm, 1.5mm ], that is, the maximum vertical distance range from the AB edge to the HI edge (i.e., the length of the BE line) is [0.5mm, 1.5mm ].
It should be further noted that the length from the chamfered edge 211 to the first pole piece 100 is the length from the chamfered edge 211 to the first pole piece 100, that is, the AB edge corresponds to the HI edge, and the CD edge corresponds to the JK edge.
It should be noted that the maximum vertical distance range from one of the chamfered edges 211 to the length edge of the first pole piece 100 is [0.5mm, 1.5mm ], which is an asymmetric narrowing.
Further, referring to fig. 1 and fig. 2, in one embodiment, the maximum perpendicular distance range from the two chamfered edges 211 to the length edge of the first pole piece 100 is [0.5mm, 1.5mm ].
Thus, it should BE noted that, of course, a symmetric narrowing mode may also BE adopted, and the maximum perpendicular distances from the two chamfered edges 211 to the length edge of the first pole piece 100 are both [0.5mm, 1.5mm ], that is, the maximum perpendicular distance from the AB edge to the HI edge (i.e., the length of the BE line), and the maximum perpendicular distance from the CD edge to the JK edge (i.e., the length of the DF line).
Further, referring to fig. 1 and fig. 2, in an embodiment, a maximum perpendicular distance from one of the chamfered edges 211 to the length edge of the first pole piece 100 is equal to one half of the total width of the second pole piece 200.
In this way, it should be noted that the maximum vertical distance from the chamfered edge 211 to the length edge of the first pole piece 100 can be flexibly set according to practical situations, and for a short battery, the tail 210 of the second pole piece 200 can be narrowed to one half of the total width of the second pole piece 200.
It should be further noted that the maximum perpendicular distance from one of the chamfered edges 211 to the length edge of the first pole piece 100 is equal to one half of the total width of the second pole piece 200, and an asymmetric narrowing manner is adopted.
Further, referring to fig. 1 and fig. 2, in an embodiment, the maximum perpendicular distance between the two chamfered edges 211 and the length edge of the first pole piece 100 is equal to one half of the total width of the second pole piece 200.
In this way, it should be noted that the maximum perpendicular distances from the two chamfered edges 211 to the length edge of the first pole piece 100 are both equal to one half of the total width of the second pole piece 200, and a symmetrical narrowing mode is adopted.
Referring to fig. 3, a battery 60 includes the above-mentioned pole piece pair 10, and further includes:
a shield shell 30, the shield shell 30 having an upper end surface 30a and a lower end surface 30 b;
a diaphragm pair including a first diaphragm and a second diaphragm;
the tab pair 40, the tab pair 40 includes a first tab 41 and a second tab 42, the first tab 41 is disposed on the first pole piece 100, and the second tab 42 is disposed on the second pole piece 200;
the first pole piece 100, the first diaphragm, the second pole piece 200 and the second diaphragm are sequentially stacked and wound to form the battery cell 50, the battery cell 50 is disposed in the protective casing 30, the first tab 41 is connected to the upper end surface 30a, and the second tab 42 is connected to the lower end surface 30 b.
Thus, it should be noted that the protective shell 30 serves to protect and seal; the pole piece pair 100, the diaphragm pair and the tab pair 40 together form the battery cell 50, which is a structural member constituting the battery cell 50, and the first diaphragm and the second diaphragm both play a role in isolation.
Further, referring to fig. 3 again, in one embodiment, the protection housing 30 includes an upper cover 31, a bottom shell 32 and a sealing ring 33, the upper cover 31 is disposed in the bottom shell 32, the sealing ring 33 is disposed between the upper cover 31 and the bottom shell 32, the upper end surface 30a is located on the upper cover 31, and the lower end surface 30b is located on the bottom shell 32.
Therefore, it should be noted that the upper cover 31 and the bottom case 32 both play a role in protection, so as to prevent the battery cell 50 from being damaged; the sealing ring 33 plays a role in sealing, and prevents external conductive media from entering the interior of the protective shell 30 to cause short circuit of the battery cell 50, thereby damaging the battery 60. Specifically, the seal ring 33 is a rubber seal ring. As described above, the specific material of the seal ring 33 can be flexibly selected depending on the actual situation, and is preferably made of a rubber material.
It should be noted that the above embodiments are exemplified by the battery being a button type battery, and the battery of the present application is not limited to a button type battery, and for example, the battery may be a cylindrical battery, a square battery, or the like.
According to the pole piece pair, the electric core and the battery, the first pole piece and the second pole piece are arranged, the second pole piece is provided with the tail part, the tail part of the second pole piece is gradually narrowed towards the middle position of the tail part of the second pole piece at the two side positions, so that the tail part of the second pole piece forms the chamfered edge at the two side positions, the width of the second pole piece at the tail part position can be better smaller than that of the first pole piece at the tail part position due to the chamfered edge, when the electric core is formed by winding, even if the tail part of the first pole piece is offset relative to the tail part of the second pole piece, the tail part of the first pole piece can also well wrap the tail part of the second pole piece, the situation of short circuit, lithium precipitation and fragment generation of the wound electric core can be reduced, and the stability and the safety of the battery are greatly improved.
The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A pole piece pair, comprising:
a first pole piece having a tail; and
the total width of the second pole piece is smaller than that of the first pole piece, the second pole piece is provided with a tail portion, the tail portion of the second pole piece is gradually narrowed towards the middle position of the tail portion of the second pole piece at the positions of two sides, and therefore the tail portion of the second pole piece forms chamfering edges at the positions of two sides.
2. The pole piece pair of claim 1, wherein the first pole piece is a positive pole piece and the second pole piece is a negative pole piece.
3. The pole piece pair of claim 1, wherein the first pole piece is a negative pole piece and the second pole piece is a positive pole piece.
4. The pole piece pair according to any one of claims 1 to 3, wherein the maximum perpendicular distance from one of the chamfered edges to the length edge of the first pole piece is in the range of [0.5mm, 1.5mm ].
5. The pole piece pair according to any one of claims 1 to 3, wherein the maximum perpendicular distance from the two chamfered edges to the length edge of the first pole piece is [0.5mm, 1.5mm ].
6. The pole piece pair of any one of claims 1 to 3, wherein the maximum perpendicular distance from one of the chamfered edges to the length edge of the first pole piece is equal to one half of the total width of the second pole piece.
7. The pole piece pair of any one of claims 1 to 3, wherein the maximum perpendicular distance from the two chamfered edges to the length edge of the first pole piece is equal to one half of the total width of the second pole piece.
8. An electrical core, comprising the pole piece pair of any one of claims 1 to 3.
9. A battery comprising the cell of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011642546.9A CN112635810A (en) | 2020-12-31 | 2020-12-31 | Pole piece pair, battery core and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011642546.9A CN112635810A (en) | 2020-12-31 | 2020-12-31 | Pole piece pair, battery core and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112635810A true CN112635810A (en) | 2021-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011642546.9A Pending CN112635810A (en) | 2020-12-31 | 2020-12-31 | Pole piece pair, battery core and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112635810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421994A (en) * | 2021-06-18 | 2021-09-21 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201413845Y (en) * | 2009-05-27 | 2010-02-24 | 辽宁九夷三普电池有限公司 | Cylindrical nickel-hydrogen high charge retention battery |
| CN203787521U (en) * | 2014-03-10 | 2014-08-20 | 广东国光电子有限公司 | Cell structure of lithium ion battery |
| CN210110927U (en) * | 2019-08-28 | 2020-02-21 | 江苏烨晨智能科技有限公司 | Novel lithium battery positive pole piece |
-
2020
- 2020-12-31 CN CN202011642546.9A patent/CN112635810A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201413845Y (en) * | 2009-05-27 | 2010-02-24 | 辽宁九夷三普电池有限公司 | Cylindrical nickel-hydrogen high charge retention battery |
| CN203787521U (en) * | 2014-03-10 | 2014-08-20 | 广东国光电子有限公司 | Cell structure of lithium ion battery |
| CN210110927U (en) * | 2019-08-28 | 2020-02-21 | 江苏烨晨智能科技有限公司 | Novel lithium battery positive pole piece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421994A (en) * | 2021-06-18 | 2021-09-21 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
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Application publication date: 20210409 |
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