CN220914403U - Square battery cell and lithium battery - Google Patents
Square battery cell and lithium battery Download PDFInfo
- Publication number
- CN220914403U CN220914403U CN202322535592.4U CN202322535592U CN220914403U CN 220914403 U CN220914403 U CN 220914403U CN 202322535592 U CN202322535592 U CN 202322535592U CN 220914403 U CN220914403 U CN 220914403U
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- CN
- China
- Prior art keywords
- positive
- negative
- plate
- tab
- lug
- Prior art date
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 10
- 239000011149 active material Substances 0.000 claims abstract description 5
- 239000013543 active substance Substances 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 239000011888 foil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to a square battery cell and a lithium battery, which belong to the technical field of new energy batteries, wherein the square battery cell comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate, the negative plate and the diaphragm are wound or laminated, the surfaces of the positive plate and the negative plate are coated with active substances, the surface of an active material layer with a certain distance is provided with a strip-shaped uncoated area, the uncoated area of the positive plate protrudes out of the diaphragm to be provided with a positive lug, the uncoated area of the negative plate protrudes out of the diaphragm to be provided with a negative lug, and the positive lug and the negative lug have different shapes. The electrode lugs with different shapes are used as the positive electrode lug and the negative electrode lug respectively, so that the positive electrode and the negative electrode of the battery cell can be distinguished more efficiently and accurately in the production process and the assembly process of the battery cell, the problem of battery cell assembly errors caused by error identification of the positive electrode pole piece and the negative electrode piece can be avoided, and the safety performance of the battery is ensured.
Description
Technical Field
The utility model relates to the technical field of new energy batteries, in particular to a square battery cell and a lithium battery.
Background
Along with the rapid increase of the cost of the lithium battery industry in recent years, the synergy and cost reduction of the lithium battery become key strategies of manufacturers in each stage, and the structure and materials of the battery are improved while the production process of the battery is improved to effectively reduce the production cost of the battery. The current collector for the battery core main body is processed into a positive current collector and a negative current collector respectively by adopting different foil materials (the positive current collector adopts aluminum foil and the negative current collector adopts copper foil), and the material price of the copper foil is higher.
When the positive current collector and the negative current collector are both made of aluminum foils, in the winding production process of the battery cells, the same current collector is adopted, so that the positive pole piece and the negative pole piece can be distinguished only by manually identifying the circulation label or observing the pole piece coating layer, the production efficiency is reduced, the problem of distinguishing errors easily occurs, and if the battery cells are assembled incorrectly due to the fact that the positive pole piece and the negative pole piece are incorrectly identified, the risk of fire and even explosion is caused when a circuit is formed between the battery cells.
Disclosure of utility model
1. Problems to be solved
Aiming at the problem that the positive electrode plate and the negative electrode plate adopt the same foil and cannot be effectively distinguished during production and processing in the prior art, the utility model provides the square battery cell, which can accurately and rapidly distinguish the positive electrode plate and the negative electrode plate when the positive electrode plate and the negative electrode plate adopt the same foil, thereby avoiding the occurrence of problems in battery assembly and ensuring the safety performance of batteries.
2. Technical proposal
In order to solve the problems, the utility model adopts the following technical scheme.
A square battery cell comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate, the negative plate and the diaphragm are wound or laminated,
The surface of each of the positive plate and the negative plate is coated with an active substance, a strip-shaped uncoated area is arranged on the surface of the active material layer at a certain distance, the uncoated area of the positive plate protrudes out of the diaphragm to form a positive lug, the uncoated area of the negative plate protrudes out of the diaphragm to form a negative lug, and the positive lug and the negative lug are in different shapes.
Further, the whole positive electrode lug and the negative electrode lug are rectangular structures, and a notch is formed in the corner of one side of the positive electrode lug or the negative electrode lug far away from the uncoated area, so that a bevel edge is formed.
Further, an included angle alpha formed between the oblique side of the positive electrode tab or the negative electrode tab and the edge part of the uncoated area is less than or equal to 45 degrees.
Further, the positive electrode plate and the negative electrode plate are formed into the positive electrode lug and the negative electrode lug respectively in the uncoated areas of the positive electrode plate and the negative electrode plate in a die cutting and forming mode;
The positive electrode lug and the negative electrode lug are respectively in an integrated structure with the positive plate and the negative plate.
Further, the positive electrode tab and the negative electrode tab are respectively connected with uncoated areas of the positive electrode tab and the negative electrode tab in an adhesive manner.
Further, the number of the positive electrode tabs and the negative electrode tabs is plural, and the plural positive electrode tabs and the plural negative electrode tabs are arranged on the uncoated areas of the positive electrode sheet and the negative electrode sheet at preset distances respectively.
Further, the positive electrode lug and the negative electrode lug are positioned on the same side of the battery cell.
Further, the positive electrode lug and the negative electrode lug are respectively positioned at two opposite sides of the battery cell.
The utility model provides a lithium battery, includes the casing that has square chamber of holding to and the apron of closed casing, square chamber of holding has inserted foretell square electric core, be provided with positive pole post and the negative pole post of being connected with anodal ear and negative pole ear electricity respectively on the apron.
3. Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
(1) The square battery cell provided by the utility model has the advantages that the lugs with different shapes are used as the positive electrode lug and the negative electrode lug respectively, so that the positive electrode and the negative electrode of the battery cell can be distinguished more efficiently and accurately in the production process and the assembly process of the battery cell, the problem of battery cell assembly errors caused by error identification of the positive electrode pole piece and the negative electrode pole piece can be avoided, and the safety performance of the battery is ensured.
(2) According to the square battery cell provided by the utility model, the notch is formed at one corner of the positive electrode lug and the negative electrode lug, so that the positive electrode lug and the negative electrode lug can be conveniently distinguished, the included angle alpha formed between the bevel edge of the positive electrode lug and the edge part of the uncoated area is smaller than or equal to 45 degrees, a buffer transition process is provided when the electrode slice is wound, the phenomenon that the electrode lug turns over due to instant steering can be avoided, the turnover probability of the electrode lug is effectively reduced, and the production efficiency and the safety performance of the battery are improved.
(3) The lithium battery provided by the utility model has the advantages that the positive electrode lug and the negative electrode lug can be identified efficiently and accurately no matter the positive electrode lug and the negative electrode lug are positioned on the same side or opposite sides of the battery core by applying the square battery core, so that the assembly connection of a plurality of battery cores in the battery module is facilitated, and the safety performance of the battery module is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a square cell in embodiment 1;
FIG. 2 is an expanded view of the square-shaped battery cell electrode sheet in example 1;
Fig. 3 is a schematic structural diagram of a square cell in embodiment 2.
In the figure:
1. A positive plate; 101. a positive electrode tab; 2. a negative electrode sheet; 201. a negative electrode ear; 3. a housing.
Detailed Description
The utility model is further described with reference to the following examples in order to facilitate the understanding of the technical means, the creation characteristics, the achievement of the objects and the effects achieved by the utility model.
Example 1
The embodiment provides a square battery cell, as shown in fig. 1, mainly including a battery cell main body, and a positive electrode lug 201 and a negative electrode lug 201 connected with the battery cell main body, wherein the positive electrode lug 101 and the negative electrode lug 201 may be located at the same side of the battery cell, or may be located at opposite sides of the battery cell respectively. The battery cell main body is shown in fig. 2, and comprises a positive electrode plate 1, a negative electrode plate 2 and a diaphragm arranged between the positive electrode plate 1 and the negative electrode plate 2, wherein the positive electrode plate 1, the negative electrode plate 2 and the diaphragm are wound or laminated, so that the battery cell main body is formed.
And, the surface of the positive plate 1 and the negative plate 2 are coated with active materials, and the surface of the active material layer with a certain distance is provided with a strip-shaped uncoated area, the uncoated area of the positive plate 1 protrudes from the diaphragm to be provided with a positive plate lug 101, the uncoated area of the negative plate 2 protrudes from the diaphragm to be provided with a negative plate lug 201, specifically, the positive plate 1 and the negative plate 2 respectively form the positive plate lug 101 and the negative plate lug 201 in the uncoated area through a die-cutting forming mode, the positive plate lug 101 and the negative plate lug 201 respectively form an integral structure with the positive plate 1 and the negative plate 2, or the positive plate lug 101 and the negative plate lug 201 can be respectively connected with the uncoated area of the positive plate 1 and the negative plate 2 through a bonding mode, namely, the positive plate lug 101 and the negative plate lug 201 are respectively arranged in a split mode with the positive plate 1 and the negative plate 2. The number of the positive electrode tabs 101 and the negative electrode tabs 201 is plural, and the plural positive electrode tabs 101 and negative electrode tabs 201 are arranged on the uncoated areas of the positive electrode sheet 1 and the negative electrode sheet 2, respectively, at a preset distance.
After the positive plate 1, the negative plate 2 and the diaphragm are subjected to working operation of a winding machine, the lugs on the pole pieces are distributed in a laminated mode, and therefore a lug structure of the battery cell is formed. In order to solve the technical problem to be solved in the background art, the positive electrode lug 101 and the negative electrode lug 201 in the embodiment have different shapes, so that the positive electrode and the negative electrode of the battery core can be distinguished more efficiently and accurately in the production process and the assembly process of the battery core, the problem of battery core assembly errors caused by error identification of the positive electrode pole piece and the negative electrode pole piece can be avoided, and the safety performance of the battery is ensured.
Specifically, the positive tab 101 and the negative tab 201 may be integrally rectangular, where the positive tab 101 is provided with a notch at a corner of one side of the positive tab far away from the uncoated area to form a bevel edge, the notch may be formed by cutting on an original rectangular tab, an included angle α formed between the bevel edge of the positive tab 101 and an edge of the uncoated area is less than or equal to 45 °, and a buffer transition process may be provided when the electrode sheet is wound, so that the tab is prevented from turning over instantaneously and then the turnover probability of the tab is effectively reduced, and the production efficiency and the safety performance of the battery are improved.
Example 2
In this embodiment, as shown in fig. 3, unlike in embodiment 1, the whole of the positive tab 101 and the negative tab 201 in this embodiment is also rectangular, in which the corner of the side of the negative tab 201 away from the uncoated region is provided with a notch to form a bevel edge, and the angle α formed between the bevel edge of the negative tab 201 and the edge of the uncoated region is less than or equal to 45 °.
Example 3
The embodiment provides a lithium battery, which comprises a shell 3 with a square accommodating cavity and a cover plate for sealing the shell 3, wherein a square battery cell in embodiment 1 or embodiment 2 is inserted into the square accommodating cavity, and a positive electrode post and a negative electrode post which are respectively electrically connected with a positive electrode lug 101 and a negative electrode lug 201 are arranged on the cover plate. By using the square battery cell, the positive electrode and the negative electrode can be identified efficiently and accurately no matter the positive electrode lug and the negative electrode lug are positioned on the same side or opposite sides of the battery cell, so that the battery module is convenient to assemble and connect a plurality of battery cells, and the safety performance of the battery module is ensured.
In the description of this patent, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "front," "rear," "clockwise," "counterclockwise," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the patent.
In this patent, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is to be limited to the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. The square battery cell comprises a positive plate (1), a negative plate (2) and a diaphragm arranged between the positive plate (1) and the negative plate (2), wherein the positive plate (1), the negative plate (2) and the diaphragm are wound or laminated,
The surface of the positive plate (1) and the surface of the negative plate (2) are coated with active substances, a strip-shaped uncoated area is formed on the surface of the active material layer at a certain distance, the uncoated area of the positive plate (1) protrudes out of the diaphragm to form a positive lug (101), the uncoated area of the negative plate (2) protrudes out of the diaphragm to form a negative lug (201), and the positive lug (101) and the negative lug (201) are in different shapes.
2. The square battery cell according to claim 1, wherein the positive tab (101) and the negative tab (201) are of rectangular structures, and the positive tab (101) or the negative tab (201) is provided with a notch at a corner of a side thereof away from the uncoated region to form a bevel edge.
3. Square cell according to claim 2, characterized in that the angle α formed between the oblique side of the positive tab (101) or the negative tab (201) and the edge portion of the uncoated region thereof is less than or equal to 45 °.
4. Square cell according to claim 1, characterized in that the positive electrode tab (1) and the negative electrode tab (2) are formed by die-cutting and forming the positive electrode tab (101) and the negative electrode tab (201) respectively in their uncoated areas;
The positive electrode lug (101) and the negative electrode lug (201) are respectively in an integrated structure with the positive electrode plate (1) and the negative electrode plate (2).
5. Square cell according to claim 1, characterized in that the positive tab (101) and the negative tab (201) are connected to the uncoated areas of the positive and negative tabs (1, 2), respectively, by means of adhesion.
6. The square battery cell according to claim 1, wherein the number of the positive electrode tabs (101) and the negative electrode tabs (201) is plural, and the plural positive electrode tabs (101) and negative electrode tabs (201) are arranged on the uncoated areas of the positive electrode tab (1) and the negative electrode tab (2) at a predetermined distance, respectively.
7. The square cell as recited in any one of claims 1-6, wherein the positive tab (101) and the negative tab (201) are located on the same side of the cell.
8. Square cell according to any of claims 1-6, characterized in that the positive tab (101) and the negative tab (201) are located on opposite sides of the cell, respectively.
9. A lithium battery comprising a housing (3) with a square receiving cavity, and a cover plate for closing the housing (3), wherein the square receiving cavity is inserted with the square cell according to any one of claims 1 to 8, and the cover plate is provided with a positive electrode post and a negative electrode post electrically connected with a positive electrode tab (101) and a negative electrode tab (201), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322535592.4U CN220914403U (en) | 2023-09-18 | 2023-09-18 | Square battery cell and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322535592.4U CN220914403U (en) | 2023-09-18 | 2023-09-18 | Square battery cell and lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220914403U true CN220914403U (en) | 2024-05-07 |
Family
ID=90919134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322535592.4U Active CN220914403U (en) | 2023-09-18 | 2023-09-18 | Square battery cell and lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220914403U (en) |
-
2023
- 2023-09-18 CN CN202322535592.4U patent/CN220914403U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |