CN216958411U - Electricity core connecting piece, electricity core subassembly and battery - Google Patents
Electricity core connecting piece, electricity core subassembly and battery Download PDFInfo
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- CN216958411U CN216958411U CN202122617986.5U CN202122617986U CN216958411U CN 216958411 U CN216958411 U CN 216958411U CN 202122617986 U CN202122617986 U CN 202122617986U CN 216958411 U CN216958411 U CN 216958411U
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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 provides a battery cell connecting piece, wherein connecting parts for connecting battery cell units are respectively arranged at two ends of the battery cell connecting piece. The battery cell connecting piece provided by the utility model enables the battery cell units to be connected through the battery cell connecting piece, so that the capacity of the battery can be conveniently selected and combined. The utility model also provides the battery core assembly and the battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery cell connecting piece, a battery cell assembly and a battery.
Background
With the development of electronic technology, lithium ion batteries have the advantages of high specific power, long cycle life, good safety performance, no pollution and the like, so that the lithium ion batteries are widely applied.
The existing lithium ion batteries have different capacities, so the sizes of the appearance sizes are different, and the specific lithium battery capacity needs to design the specific battery cell appearance size, so a production line needs to be correspondingly established for producing one type of battery cells (namely, the production lines for producing different types of battery cells can not be generally used), thereby the equipment investment is greatly increased.
Disclosure of Invention
The utility model aims to provide a battery cell connecting piece, a battery cell assembly and a battery, aiming at solving the defects of the prior art.
An embodiment of the present invention provides a battery cell connecting piece, where two ends of the battery cell connecting piece are respectively provided with a connecting portion for connecting a battery cell unit.
In an implementation manner, the cell unit is provided with a tab, and the connecting portion is provided with a groove for the tab to be inserted into.
In an implementation manner, a breaking portion facilitating bending or shearing of the cell connecting piece is arranged between two ends of the cell connecting piece.
In an implementable manner, the thickness of the break is less than the thickness of the cell connector.
In an implementable manner, the surface of the disconnection portion is etched to form at least one indentation facilitating bending or shearing of the cell connection member.
In one implementable form, the cell connector is a surface nickel plated copper connector.
Another embodiment of the present invention further provides an electrical core assembly, including the electrical core connecting component described above, where the electrical core assembly further includes at least two electrical core units, and every two electrical core units are connected by the electrical core connecting component.
In an implementation manner, each of the cell units includes a positive plate, a negative plate and a diaphragm, the positive plate and the negative plate are separated by the diaphragm, and the cell units are formed by laminating and compounding the positive plate, the negative plate and the diaphragm.
In an achievable mode, tabs are arranged at two ends of each battery cell unit, grooves are formed in the connecting portions, and the tabs are connected with the connecting portions at the grooves.
In an implementable manner, in every two adjacent cell units, the tab on one of the cell units is inserted into the groove of the connecting portion at one end of the cell connecting member, and the tab on the other cell unit is inserted into the groove of the connecting portion at the other end of the cell connecting member.
In one implementable form, the cell assembly further comprises an insulating film at least partially covering an outer surface of the cell unit and/or the cell connector.
In an achievable form, the insulating film is provided with wetting holes for facilitating the passage of the electrolyte.
Yet another embodiment of the present invention also provides a battery including the above-described electric core assembly.
The battery core connecting piece and the battery core assembly provided by the utility model have the advantages that each battery core unit is used as a basic unit capacity, namely, the capacity of the battery core units is standardized, and the required battery capacity can be obtained by changing the number of the battery core units, so that batteries with various capacities can be produced by using one production line, the production is convenient, and the equipment investment is saved. When utilizing this electric core subassembly preparation battery, only need the electric core unit of intercepting corresponding quantity, can obtain the battery of required capacity, the capacity of battery can be selected according to the demand is nimble promptly. Meanwhile, the cell units are connected through the cell connecting pieces, namely the cell units are provided with the cell connecting pieces, and the cell units are not required to be additionally provided with connecting pieces during subsequent welding (generally, the cell units are required to be additionally provided with connecting pieces (such as nickel-plated copper sheets) during subsequent welding to improve the welding effect), so that the cell units are convenient to weld. Moreover, the cell units are connected through the cell connecting pieces to facilitate storage of the cell units, and a battery formed by the connected cell units can be wound on a reel or stored in other modes to reduce storage space.
Drawings
Fig. 1 is a schematic perspective view of an electrical core assembly according to an embodiment of the present invention.
Fig. 2 is a schematic view of the exploded structure of fig. 1.
Fig. 3 is a schematic view of a connection structure of the cell units in fig. 1.
Fig. 4 is a schematic view of the exploded structure of fig. 3.
Fig. 5 is an exploded view of the cell unit in fig. 3.
Fig. 6 is a schematic structural diagram of the cell connector in fig. 3.
Fig. 7 is an exploded view of an electrical core assembly storage structure according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The terms of orientation, up, down, left, right, front, back, top, bottom, and the like (if any) referred to in the specification and claims of the present invention are defined by the positions of structures in the drawings and the positions of the structures relative to each other, only for the sake of clarity and convenience in describing the technical solutions. It is to be understood that the use of the directional terms should not be taken to limit the scope of the utility model as claimed.
As shown in fig. 1 to 4, the battery core assembly 1 provided by the embodiment of the present invention includes at least two battery cell units 11 and a battery cell connecting member 12, where each battery cell unit 11 is used as a basic unit capacity, and every two battery cell units 11 are connected by the battery cell connecting member 12.
In one embodiment, the cell connectors 12 are sheet-shaped, that is, the cell connectors 12 are connecting sheets.
In one embodiment, the cell connector 12 is a copper connector with a nickel-plated surface (i.e., a copper nickel-plated structure).
As shown in fig. 5, as an embodiment, each cell unit 11 includes a positive electrode tab 111, a negative electrode tab 112, and a separator 113, the positive electrode tab 111 and the negative electrode tab 112 are separated by the separator 113, and the cell unit 11 is formed by laminating the positive electrode tab 111, the negative electrode tab 112, and the separator 113.
Specifically, each cell unit 11 may include one positive plate 111, one negative plate 112, and three separators 113, where one separator 113 is located between the positive plate 111 and the negative plate 112, and the other two separators 113 are located at the outermost sides of the cell unit 11, that is, the cell unit 11 forms a five-layer structure of the separator 113-the positive plate 111-the separator 113-the negative plate 112-the separator 113. Alternatively, each cell unit 11 may include two positive electrode sheets 111, two negative electrode sheets 112, and five separators 113, the two positive electrode sheets 111 and the two negative electrode sheets 112 are alternately arranged in sequence, each positive electrode sheet 111 and each negative electrode sheet 112 are separated by a separator 113, and the two separators 113 are located at the outermost sides of the cell units 11, that is, the cell units 11 form a nine-layer structure. Of course, the number of layers of the cell unit 11 may be selected according to the actual capacity requirement, as long as the outermost layer is the diaphragm 113, so as to ensure the insulation between the cell unit 11 and other components. The positive electrode tab 111, the negative electrode tab 112, and the separator 113 are stacked and then thermally bonded to form a whole, so as to form the cell unit 11.
As shown in fig. 1 to 4, as an embodiment, the cell units 11 have a strip-shaped structure, and at least two cell units 11 are sequentially arranged along the length direction L of the cell units 11.
As shown in fig. 1 to 4, as an embodiment, the number of the cell units 11 is plural, and the plural cell units 11 are arranged in sequence along the longitudinal direction L of the cell units 11.
As shown in fig. 4 and 6, in one embodiment, the cell connectors 12 are provided at both ends thereof with connection portions 122 for connecting the cell units 11.
As shown in fig. 4 and 6, as an embodiment, a tab 114 is provided on the battery cell unit 11, a groove 122a into which the tab 114 is inserted is provided on the connection portion 122, and the tab 114 and the connection portion 122 are connected at the groove 122 a.
Specifically, tabs 114 are disposed at two ends of the cell unit 11 along the length direction L of the cell unit 11, the tab 114 at one end of the cell unit 11 is a positive tab, and the tab 114 at the other end of the cell unit 11 is a negative tab. The opposite ends of the cell connecting member 12 are provided with grooves 122a, and in every two adjacent cell units 11, the tab 114 of one cell unit 11 is inserted into the groove 122a of the connecting portion 122 at one end of the cell connecting member 12, and the tab 114 of the other cell unit 11 is inserted into the groove 122a of the connecting portion 122 at the other end of the cell connecting member 12. After the tabs 114 are inserted into the grooves 122a, the cell unit 11 and the cell connecting member 12 may be fixed by welding as needed.
As shown in fig. 4 and 6, in one embodiment, a breaking portion 121 is provided between both ends of the cell connector 12 to facilitate bending or shearing of the cell connector 12.
As shown in fig. 4 and 6, in one embodiment, the thickness of the disconnection portion 121 is smaller than the thickness of the cell connector 12.
As shown in fig. 4 and 6, in one embodiment, at least one indentation is formed on the surface of the breaking portion 121 by etching, so as to facilitate bending or shearing of the cell connector 12.
Specifically, the advantages of providing the disconnection portion 121 on the cell connection member 12 include: when the cell assembly needs to intercept the corresponding number of cell units 11, only the cell connecting piece 12 needs to be cut off at the position of the breaking part 121, so that the operation is convenient. As shown in fig. 4 and 6, as an embodiment, the surfaces of the opposite sides of the cell connecting member 12 are provided with dents.
As shown in fig. 1 and 2, the battery cell assembly 1 further includes an insulating film 13, and the insulating film 13 at least partially covers the outer surface of the battery cell 11 and/or the battery cell connector 12.
Specifically, since the tabs 114 at the two ends of the core assembly 1 and the exposed parts of the core connecting member 12 may cause short circuit if electrical contact occurs during the subsequent battery assembling process, the short circuit problem can be solved well by providing the insulating film 13. As an embodiment, the number of the insulating films 13 is two, after the cell units 11 are connected by the cell connectors 12, the two insulating films 13 are used to cover the two side surfaces of the cell units 11 and the cell connectors 12 in the stacking direction of the pole pieces and the diaphragms, respectively, and then the insulating films 13, the cell units 11, and the cell connectors 12 are formed into a whole by thermal compounding. The insulating film 13 may be made of PP (polypropylene), PPs (polyphenylene sulfide), or the like.
As shown in fig. 1 and 2, as an embodiment, the insulating film 13 is provided with a wetting hole 131 for allowing the electrolyte to pass through, so as to solve the problem of electrolyte injection after the battery is assembled.
As shown in fig. 7, an embodiment of the present invention further provides a cell assembly storage structure, which includes the above-mentioned cell assembly 1, and further includes a winding shaft 2, wherein the cell assembly 1 is wound around the winding shaft 2 to form a coiled strip-shaped structure. The required capacity size that provides of battery of the diameter of spool 2 is decided, can realize adjusting the electric core subassembly quantity in single storage structure promptly through increasing the quantity that reduces electric core subassembly 1, chooses for use to carry out stable winding installation corresponding to the spool 2 of the different diameters of electric core subassembly 1 volume. Therefore, under the condition that the overall shape and the size of the outside of the battery are not changed, the capacity of the battery and the stability of the winding installation of the battery cell can be adjusted through the diameter change of the scroll 2, the storage is facilitated, in the later-stage battery production, the required number of battery cell units can be conveniently intercepted from the battery cell assembly storage structure to produce batteries with corresponding capacities, and the purpose that one universal production line is utilized to meet the production links of the battery cells with different capacities is achieved.
As shown in fig. 7, as an embodiment, the electric core assembly storage structure further includes a housing 3 and a cover plate 4 combined with each other, and the electric core assembly 1 is disposed in the housing 3 and stored in a disc shape.
The embodiment of the present invention also provides another cell assembly storage structure (not shown in the drawings), in which the cell units 11 strung on the cell assembly 1 are in a zigzag folding storage structure.
The embodiment of the present invention also provides a battery (not shown in the figures), which comprises one or more above-mentioned cell assemblies 1, wherein the cell units 11 of each cell assembly 1 are arranged in parallel or partially in parallel, so as to achieve the designed battery capacity of the battery.
The cell connecting piece 12, the cell assembly 1 and the battery provided by the embodiment of the utility model have the advantages that:
1. each cell unit 11 is set as a basic unit capacity, that is, the capacity of the cell unit 11 is standardized, and the required battery capacity can be obtained by changing the number of the cell units 11, so that batteries with various capacities can be produced by using one production line, thereby facilitating production and saving equipment investment. When utilizing this electric core subassembly 1 preparation battery, only need the intercepting to correspond the electric core unit 11 of quantity, can obtain the battery of required capacity, the capacity of battery can be selected according to the demand is nimble promptly, and this electric core subassembly 1 can be used for making coiling battery or lamination battery.
2. The cell units 11 are connected through the cell connecting pieces 12, that is, the cell units 11 are provided with the cell connecting pieces 12, the cell units 11 do not need to be additionally provided with connecting pieces during subsequent welding (due to different metal types of the tabs 114 on the cell units 11, the connecting pieces (such as nickel-plated copper sheets and the like) are generally required to be added during subsequent welding to improve the welding effect), and no additional process or production line is required to be arranged for installing the connecting pieces on the cell units 11, so that the welding of the cell units 11 is facilitated.
3. The storage that can make things convenient for electric core unit 11 is connected through electric core connecting piece 12 between electric core unit 11, for example electric core unit 11 after connecting can twine on spool 2 or store with other mode (zigzag folding) to reduce storage space, only need the electric core unit 11 of the corresponding quantity of intercepting when the equipment battery.
4. A groove 122a is formed in the cell connector 12, and the tab 114 can be inserted into the groove 122a, so as to facilitate connection between the cell unit 11 and the cell connector 12.
5. The cell connecting piece 12 is provided with a breaking part 121 which is convenient for bending or cutting the cell connecting piece 12, so that the cell unit 11 can be conveniently cut.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. The battery cell connecting piece is characterized in that two ends of the battery cell connecting piece (12) are respectively provided with a connecting part (122) for connecting a battery cell unit (11); the battery cell unit (11) is provided with a tab (114), and the connecting portion (122) is provided with a groove (122a) for inserting the tab (114).
2. The cell connector according to claim 1, wherein a break (121) is provided between the two ends of the cell connector (12) to facilitate bending or shearing of the cell connector (12).
3. The cell connector of claim 2, wherein the thickness of the break-away portion (121) is less than the thickness of the cell connector (12).
4. The cell connector according to claim 2, characterized in that the surface of the break-away portion (121) is etched to form at least one indentation which facilitates bending or shearing of the cell connector (12).
5. The cell connector of claim 1, wherein the cell connector (12) is a copper connector with a nickel plating surface.
6. A cell assembly, characterized in that it comprises a cell connecting member (12) according to any one of claims 1 to 5, and at least two cell units (11), wherein each two cell units (11) are connected by the cell connecting member (12).
7. The battery pack according to claim 6, wherein each of the cell units (11) comprises a positive electrode sheet (111), a negative electrode sheet (112) and a diaphragm (113), the positive electrode sheet (111) and the negative electrode sheet (112) are separated by the diaphragm (113), and the cell units (11) are formed by laminating and compounding the positive electrode sheet (111), the negative electrode sheet (112) and the diaphragm (113).
8. The electric core assembly according to claim 6, characterized in that, the two ends of the electric core unit (11) are provided with tabs (114), the connecting portion (122) is provided with a groove (122a), and the tabs (114) are connected with the connecting portion (122) at the groove (122 a).
9. The battery assembly according to claim 8, wherein, in every two adjacent battery cell units (11), the tab (114) of one battery cell unit (11) is inserted into the groove (122a) of the connecting portion (122) at one end of the battery cell connecting member (12), and the tab (114) of the other battery cell unit (11) is inserted into the groove (122a) of the connecting portion (122) at the other end of the battery cell connecting member (12).
10. The electric core assembly according to any of claims 6-9, characterized in that said electric core assembly (1) further comprises an insulating film (13), said insulating film (13) at least partially covering the outer surface of said cell units (11) and/or said cell connection members (12).
11. The electric core assembly according to claim 10, wherein said insulating film (13) is provided with wetting holes (131) for facilitating the passage of the electrolyte.
12. A battery, characterized by comprising an electric core assembly (1) according to any one of claims 6-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122617986.5U CN216958411U (en) | 2021-10-28 | 2021-10-28 | Electricity core connecting piece, electricity core subassembly and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122617986.5U CN216958411U (en) | 2021-10-28 | 2021-10-28 | Electricity core connecting piece, electricity core subassembly and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216958411U true CN216958411U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122617986.5U Active CN216958411U (en) | 2021-10-28 | 2021-10-28 | Electricity core connecting piece, electricity core subassembly and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216958411U (en) |
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2021
- 2021-10-28 CN CN202122617986.5U patent/CN216958411U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Cell connectors, cell assemblies, and batteries Effective date of registration: 20230306 Granted publication date: 20220712 Pledgee: South Taihu New Area sub branch of Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Pledgor: MICROVAST POWER SYSTEMS Co.,Ltd. Registration number: Y2023980033886 |