CN220934335U - Series-parallel connection structure of cylindrical battery cells and starting lithium battery - Google Patents
Series-parallel connection structure of cylindrical battery cells and starting lithium battery Download PDFInfo
- Publication number
- CN220934335U CN220934335U CN202322454806.5U CN202322454806U CN220934335U CN 220934335 U CN220934335 U CN 220934335U CN 202322454806 U CN202322454806 U CN 202322454806U CN 220934335 U CN220934335 U CN 220934335U
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- Prior art keywords
- cell
- electric core
- battery cell
- battery
- cell array
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- 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
- 238000003491 array Methods 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a serial-parallel connection structure of a cylindrical battery core and a starting lithium battery. The serial-parallel connection structure of the cylindrical battery cells comprises 2n battery cell arrays, and a first battery cell connecting sheet, a second battery cell connecting sheet and a third battery cell connecting sheet which are used for connecting the battery cell arrays; the improvement is that: two second cell connecting sheets are arranged between the upper cell array and the lower cell array; the second electric core connection piece includes electric core connecting portion and along electric core connecting portion one side outside extension's electrode connecting portion, and two second electric core connection pieces range upon range of setting, and the positive pole of two-layer electric core array is connected, negative pole respectively with upper and lower two-layer electric core connection portion to the electric core connecting portion of two, and laminating and welded connection about the electrode connecting portion of two. According to the serial-parallel connection structure of the cylindrical battery cells, the two second battery cell connection pieces for connecting the upper battery cell array and the lower battery cell array are connected together in a welding mode, so that the overcurrent capacity of the battery cell connection pieces for connecting the upper battery cell array and the lower battery cell array is improved, and potential safety hazards are reduced.
Description
Technical Field
The utility model relates to the field of lithium ion battery assembly, in particular to a serial-parallel connection structure of a cylindrical battery core and a starting lithium battery.
Background
The current lithium battery on the market generally adopts 4 strings of cylindrical cells (cell arrays) to be connected in series and parallel to form a battery pack, as shown in fig. 1, in order to more reasonably utilize space and save materials, the positive pole of the battery pack is close to the positive pole column of the upper cover, and the negative pole is close to the negative pole column of the upper cover, so that the connecting lead is shortest, the overcurrent capacity is improved, and meanwhile, the cost is saved. The process is limited, the cell connecting sheet for connecting the upper and lower cells is in a bending state, the overcurrent capacity of the place is relatively poor, and if the instant starting current is too large, heating and even burning can occur, so that potential safety hazards exist.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a novel serial-parallel connection structure of cylindrical cells, improves the overcurrent capacity of cell connecting sheets for connecting an upper cell array and a lower cell array in a battery pack, and reduces potential safety hazards.
The technical proposal is as follows:
A serial-parallel connection structure of cylindrical cells comprises 2n cell arrays, and a first cell connecting sheet, a second cell connecting sheet and a third cell connecting sheet which are used for connecting the cell arrays;
The 2n cell arrays are divided into two groups; the anodes of the first cell array to the nth cell array face upwards, and the cathodes of the (n+1) th cell array to the (2 n) th cell array face upwards;
the positive electrode of the first cell array and the negative electrode of the 2 n-th cell array are respectively connected with a first cell connecting sheet;
Two second cell connecting sheets are arranged between the upper cell array and the lower cell array; the second electric core connecting piece comprises an electric core connecting part and an electrode connecting part which extends outwards along one side of the electric core connecting part, two second electric core connecting pieces are arranged in a lamination mode, the electric core connecting parts of the two second electric core connecting pieces are respectively connected with the positive electrode and the negative electrode of the upper and lower electric core arrays, and the electrode connecting parts of the two second electric core connecting pieces are attached up and down and welded;
The negative electrode of the nth cell array, the positive electrode of the (n+1) th cell array and a third cell connecting sheet are connected;
wherein n is 2 or more.
Further, the electrode connecting parts of the two second electric core connecting pieces are bent after being welded and attached to the side edges of the electric core array.
Furthermore, the welding mode of the electrode connecting parts of the two second electric core connecting pieces adopts an ultrasonic welding mode.
Further, the battery cell array comprises a plurality of battery cells and two battery cell brackets; the battery cell support is fixed at two ends of the battery cell array, battery cell fixing holes distributed in an array mode are formed in the battery cell support, and each battery cell is fixed Kong Zhiduo to fix one battery cell.
Further, the cell connecting sheet is pure nickel or nickel-plated metal sheet.
Further, n is equal to 2 or 4 or 8.
The utility model also provides a starting lithium battery, which has the following technical scheme:
A starting lithium battery comprises a box body and a battery pack arranged in the box body; the upper cover of the box body is provided with a positive pole and a negative pole, and the structure of the battery pack is the serial-parallel connection structure of the cylindrical battery cells; and two first electric core connecting sheets of the serial-parallel connection structure of the cylindrical electric core are upward and are respectively connected with the positive pole post and the negative pole post through wires according to the polarity relation.
The utility model realizes the following technical effects:
According to the serial-parallel connection structure of the cylindrical battery cells, the two second battery cell connection pieces for connecting the upper battery cell array and the lower battery cell array are connected together in a welding mode, so that the overcurrent capacity of the battery cell connection pieces for connecting the upper battery cells and the lower battery cells is improved, and potential safety hazards are reduced.
Drawings
FIG. 1 is a prior art serial-parallel connection structure of cylindrical cells;
FIG. 2 is an expanded view of the serial-parallel connection structure of the cylindrical cells of the present utility model;
FIG. 3 is a schematic diagram of an assembly process of a serial-parallel connection structure of a cylindrical cell of the present utility model;
Fig. 4 is an assembly completion schematic diagram of the serial-parallel connection structure of the cylindrical battery cell of the present utility model.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The utility model will now be further described with reference to the drawings and detailed description.
Example 1
As shown in fig. 2 to 4, the present embodiment provides a serial-parallel connection structure of 4-serial cylindrical cells, which is mounted in a case to form a battery pack. The positive pole and the negative pole of the serial-parallel connection structure of the cylindrical battery cell are both arranged upwards, so that the connection between the positive pole and the negative pole on the upper cover of the battery pack is convenient.
In this embodiment, the serial-parallel connection structure of the cylindrical battery cells is a 4-serial 12-parallel structure, and the total of 4 battery cell arrays includes 12 cylindrical battery cells with identical polarity directions, and the total of 48 battery cells. The cells are connected together by three cell connecting pieces, including first cell connecting pieces 5, 6 leading out positive and negative poles, second cell connecting pieces 7, 8, 9, 10 for connecting upper and lower two-layer cell arrays, and third cell connecting pieces 11 for connecting the two cell arrays laterally at the bottom.
The 4 cell arrays 1, 2, 3 and 4 are divided into two groups, the positive poles of the cell arrays 1 and 2 face upwards, the cell arrays 1 and 2 are connected through second cell connecting sheets 7 and 8, and the positive pole of the cell array 1 is connected with a first cell connecting sheet 5; the cathodes of the cell arrays 3 and 4 face upwards, the cell arrays 3 and 4 are connected through second cell connecting sheets 9 and 10, and the cathodes of the cell arrays 4 are connected with the first cell connecting sheet 6; the cell negative electrode of the cell array 2 and the cell positive electrode of the cell array 3 are connected through a third cell connecting sheet 11.
When the second cell connecting pieces 7, 8 are laminated and connected, and the second cell connecting pieces 9, 10 are laminated and connected, the connection of the serial-parallel connection structure of the cylindrical cells is completed.
In this embodiment, 12 cells of each cell array are fixed by two cell supports 12, specifically, two cell supports are fixed at two ends of the cell array, and cell fixing holes distributed in an array are provided, and each cell is fixed Kong Zhiduo to fix one cell, so that single-layer cells are orderly arranged to form a complete assembly, and the structure can facilitate assembly and welding of a battery pack.
Connection of two second cell connection pieces:
Taking the second cell connecting piece 7 as an example, the second cell connecting piece 7 includes a cell connecting portion 71 and an electrode connecting portion 72 extending outward along one side of the cell connecting portion 71. Each cell connecting part corresponds to one cell array, and the size of the cell connecting part can cover the end face of one cell array approximately and is connected with all cell anodes or cell cathodes of the cell array in a welding way. The electrode connection portion 72 of the second cell connection piece 7 protrudes beyond the edge of the cell holder 12 of the cell array 1 for welding connection with the electrode connection portion 82 of the second cell connection piece 8 to form a reliable electrical connection and a large overcurrent capability.
Preferably, the welding mode of the two second electric core connecting pieces adopts an ultrasonic welding mode, and electrode connecting parts of the two second electric core connecting pieces are stacked and welded together, so that the overcurrent capacity of connecting the upper battery array electric core connecting piece and the lower battery array electric core connecting piece is ensured.
Preferably, the electrode connecting parts of the two second cell connecting sheets after lamination welding are bent and attached to the side surfaces of the cell array, so that the compact structure of the battery pack is ensured.
In this embodiment, the material of the cell connection piece is preferably pure nickel, or nickel plating material.
In a specific application, according to different requirements of voltage and current, the serial-parallel connection structure of the cylindrical battery cell can be set as follows:
The serial-parallel connection structure of the cylindrical battery cells comprises 2n battery cell arrays, two first battery cell connecting pieces, 4n-4 second battery cell connecting pieces and a third battery cell connecting piece, wherein the two first battery cell connecting pieces, the 4n-4 second battery cell connecting pieces and the third battery cell connecting pieces are used for connecting the battery cell arrays.
The 2n electric core arrays are divided into two groups, the positive poles of the 1 st to n electric core arrays face upwards, the upper and lower electric core arrays are connected through two second electric core connecting sheets, and the positive pole of the 1 st electric core array is connected with one first electric core connecting sheet; the cathodes of the (n+1) th to (2 n) th cell arrays face upwards, the upper and lower two layers of cell arrays are connected through two second cell connecting sheets, and the cathodes of the 2n th cell arrays are connected with one first cell connecting sheet; the cell negative electrode of the nth cell array and the cell positive electrode of the (n+1) th cell array are connected through a third cell connecting sheet.
In a specific application, the specification of the cylindrical battery cell can be selected according to the requirement. Specifications for cylindrical cells include, but are not limited to 18650, 26650, etc.
In specific applications, the voltage of the battery pack is typically 12V, 24V, 48V, etc., and the voltage of each lithium battery is typically 3V-3.2V, so that a commonly used battery pack typically includes 4 strings, 8 strings, or 16 strings of cell arrays, and the value of n is preferably 2, 4, or 8.
In summary, the serial-parallel connection structure of the cylindrical battery cells of the embodiment has the following technical effects:
The serial-parallel connection structure of the cylindrical battery cells adopts a welding mode to connect the two second battery cell connection sheets for connecting the upper battery cell array and the lower battery cell array together, thereby improving the overcurrent capacity of the battery cell connection sheets for connecting the upper battery cell array and the lower battery cell array and reducing potential safety hazards.
The utility model also provides a starting lithium battery, which comprises a box body and a battery pack arranged in the box body; the upper cover of the box body is provided with a positive pole and a negative pole, and the structure of the battery pack is the serial-parallel connection structure of the cylindrical battery cells; the two first battery cell connecting pieces 5 and 6 of the serial-parallel connection structure of the cylindrical battery cells face upwards and are respectively connected with the positive pole post and the negative pole post through wires according to the polarity relation.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. A serial-parallel connection structure of a cylindrical cell is characterized in that: the battery cell comprises 2n battery cell arrays, and a first battery cell connecting piece, a second battery cell connecting piece and a third battery cell connecting piece which are used for connecting the battery cell arrays;
The 2n cell arrays are divided into two groups; the anodes of the first cell array to the nth cell array face upwards, and the cathodes of the (n+1) th cell array to the (2 n) th cell array face upwards;
the positive electrode of the first cell array and the negative electrode of the 2 n-th cell array are respectively connected with a first cell connecting sheet;
Two second cell connecting sheets are arranged between the upper cell array and the lower cell array; the second electric core connecting piece comprises an electric core connecting part and an electrode connecting part which extends outwards along one side of the electric core connecting part, two second electric core connecting pieces are arranged in a lamination mode, the electric core connecting parts of the two second electric core connecting pieces are respectively connected with the positive electrode and the negative electrode of the upper and lower electric core arrays, and the electrode connecting parts of the two second electric core connecting pieces are attached up and down and welded;
The negative electrode of the nth cell array, the positive electrode of the (n+1) th cell array and a third cell connecting sheet are connected;
wherein n is 2 or more.
2. The serial-parallel connection structure of cylindrical cells according to claim 1, wherein: the electrode connecting parts of the two second electric core connecting pieces are bent after being welded and are attached to the side edges of the electric core array.
3. The serial-parallel connection structure of cylindrical cells according to claim 1, wherein: the welding mode of the electrode connecting parts of the two second electric core connecting pieces adopts an ultrasonic welding mode.
4. The serial-parallel connection structure of cylindrical cells according to claim 1, wherein: each cell array comprises a plurality of cells and two cell supports; the battery cell support is fixed at two ends of the battery cell array, battery cell fixing holes distributed in an array mode are formed in the battery cell support, and each battery cell is fixed Kong Zhiduo to fix one battery cell.
5. The serial-parallel connection structure of cylindrical cells according to claim 1, wherein: the cell connecting sheet is made of pure nickel or nickel-plated metal sheet.
6. The serial-parallel connection structure of cylindrical cells according to claim 1, wherein: n is equal to 2 or 4 or 8.
7. A start-up lithium battery, characterized by: comprises a box body and a battery pack arranged in the box body; the upper cover of the box body is provided with a positive pole and a negative pole, and the structure of the battery pack is a serial-parallel connection structure of the cylindrical battery cells as set forth in any one of claims 1-6; and two first electric core connecting sheets of the serial-parallel connection structure of the cylindrical electric core are upward and are respectively connected with the positive pole post and the negative pole post through wires according to the polarity relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322454806.5U CN220934335U (en) | 2023-09-08 | 2023-09-08 | Series-parallel connection structure of cylindrical battery cells and starting lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322454806.5U CN220934335U (en) | 2023-09-08 | 2023-09-08 | Series-parallel connection structure of cylindrical battery cells and starting lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220934335U true CN220934335U (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322454806.5U Active CN220934335U (en) | 2023-09-08 | 2023-09-08 | Series-parallel connection structure of cylindrical battery cells and starting lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220934335U (en) |
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2023
- 2023-09-08 CN CN202322454806.5U patent/CN220934335U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 9 Shengli Road, Bajia Village, Gutian Town, Shanghang County, Longyan City, Fujian Province, 364200 Patentee after: Fujian Liangdao New Energy Development Co.,Ltd. Country or region after: China Address before: Area A, 1st Floor, R&D Building, Yuanlong Industrial Park, No. 888 Yangming Road, Haicang District, Xiamen City, Fujian Province, 361000 Patentee before: POWEROAD (XIAMEN) RENEWABLE ENERGY TECHNOLOGY CO.,LTD. Country or region before: China |
|
| CP03 | Change of name, title or address |