CN219739150U - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN219739150U CN219739150U CN202320674988.4U CN202320674988U CN219739150U CN 219739150 U CN219739150 U CN 219739150U CN 202320674988 U CN202320674988 U CN 202320674988U CN 219739150 U CN219739150 U CN 219739150U
- Authority
- CN
- China
- Prior art keywords
- battery pack
- shaped battery
- shaped
- paper tube
- terminal connecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000003466 welding Methods 0.000 claims abstract description 32
- 238000007493 shaping process Methods 0.000 claims abstract description 9
- 239000000123 paper Substances 0.000 claims description 37
- 239000002390 adhesive tape Substances 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 239000002655 kraft paper Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model provides a battery pack, which is characterized by comprising an L-shaped battery pack formed by a plurality of single batteries and a paper tube sleeved outside the L-shaped battery pack, wherein the L-shaped battery pack is formed by arranging the single batteries in a row in an alternating manner of positive and negative terminals, spot-welding positive terminals and negative terminals of two adjacent single batteries at two ends of a terminal connecting sheet, folding the terminal connecting sheet in half and extruding and shaping the terminal connecting sheet, the paper tube covers the whole side surface of the L-shaped battery pack, the thickness of the paper tube is more than 0.5mm, and the whole curvature of the battery pack is less than 1mm.
Description
Technical Field
The utility model relates to a battery pack, in particular to an L-shaped battery pack sleeved with a paper tube.
Background
The battery pack is generally formed by connecting a plurality of single cells in series and/or parallel via terminal connection sheets. The arrangement modes of the plurality of single cells are roughly divided into two types of F-type and L-type, wherein the F-type refers to that more than two single cells are arranged side by side left and right; the "L-shape" means that two or more single cells are arranged end to end up. The terminal connecting sheet is usually a long nickel sheet, more than two single cells are arranged into an F shape in a positive-negative staggered mode, two ends of the long nickel sheet are respectively spot-welded on a positive electrode terminal and/or a negative electrode terminal of an adjacent single cell, and then the terminal connecting sheet is folded in half by a tool or manually and slightly extruded for shaping, so that the long battery pack connected end to end is formed.
However, since the long nickel plate has a certain bending radius after being folded in half, and cannot be completely flattened, and there is a level difference at the end face of the battery, the assembled L-shaped battery is likely to be bent by the level difference, and particularly if the number of unit cells is large (for example, 10 or more), the degree of bending of the long L-shaped battery is also increased, and for example, the long L-shaped battery cannot be housed in a battery compartment or the like, resulting in various problems and inconveniences in use.
On the other hand, since the single cell is generally cylindrical, sharp corners (corners) generated after the long terminal connecting pieces are folded in half easily exceed the circumferential surface of the single cell. For the soft-packed battery pack, the sharp angle is easy to puncture the outer package of the soft-packed battery pack after heat shrinkage, so that short circuit is caused; for the battery pack of the hard pack, the protruding corners affect the assembly size of the battery pack, and miniaturization is not easy to achieve. In order to avoid the problem of the "sharp angle", conventionally, spot welding is performed manually using a terminal connecting piece having a short length, specifically, as shown in fig. 6 (a) and 6 (b), two single cells (1) are vertically obliquely opposed to each other, and after adjusting the position of the terminal connecting piece (2), spot welding is performed manually to obtain an L-shaped battery pack shown in fig. 6 (c). The spot welding method can avoid the problem of sharp angle of the terminal connecting sheet, but has the defects that manual spot welding is needed, and the assembly speed and the spot welding precision of the battery pack are greatly reduced; as shown in fig. 6 (d), there is still a height difference at the end face of the battery after assembly, and when the number of the unit cells is large, it is unavoidable that the assembled L-shaped battery pack is bent to a large extent.
Modern large-scale industrial production requires that automatic spot welding is adopted as much as possible in a battery assembly process, but at present, an L-shaped battery pack which is formed by a plurality of (more than or equal to 10) single cells and has low overall bending degree, good appearance and high safety and reliability is difficult to obtain by an automatic spot welding mode.
Disclosure of Invention
The utility model aims to provide a battery pack, which can prevent an L-shaped battery pack formed by a plurality of single cells from bending after spot welding, is applicable to automatic spot welding and can avoid the problem of short circuit of the battery pack caused by sharp corners of terminal connecting sheets.
The battery pack of the utility model is characterized by comprising an L-shaped battery pack formed by a plurality of single cells and a paper tube sleeved outside the L-shaped battery pack,
the L-shaped battery pack is a strip-shaped battery pack formed by arranging a plurality of single cells in a row in an alternating manner of positive and negative terminals, spot-welding positive terminals and negative terminals of two adjacent single cells at two ends of a terminal connecting sheet, folding the terminal connecting sheet in half, extruding and shaping,
the paper tube covers the whole side face of the L-shaped battery pack, the thickness is more than 0.5mm,
the overall curvature of the battery pack is smaller than 1mm.
Preferably, the single cell is a cylindrical cell.
Preferably, more than 1 strip-shaped adhesive tape is attached to the side surface of the L-shaped battery pack, and the adhesive tape is located between the paper tube and the L-shaped battery pack.
Preferably, the two adhesive tapes are respectively positioned at two sides of the L-shaped battery pack which are symmetrical relative to the axis.
Preferably, the adhesive tape covers a sharp corner of the terminal connection sheet exposed by doubling back.
Preferably, the number of the single cells is 10 or more.
Preferably, the L-shaped battery pack has a length of 0.5m or more.
Preferably, the paper tube is made of kraft paper, and the terminal connecting sheet is made of metallic nickel sheet.
Preferably, the spot welding is an F-type spot welding using an automatic spot welder.
Preferably, the unit cell is a nickel-hydrogen secondary battery or a lithium secondary battery.
Effects of the utility model
In the battery pack, the paper tube with high hardness is sleeved on the outer side of the L-shaped battery pack, so that the L-shaped battery pack formed by a plurality of single cells can be prevented from being bent, the automatic spot welding can be applied, the problem of short circuit caused by sharp corners of the terminal connecting sheets is avoided, and the battery pack is good in appearance, safe and reliable.
Drawings
Fig. 1 is a schematic view showing an arrangement state of a plurality of unit cells in a battery pack with a paper tube according to the present utility model at the time of spot welding, (a) a plan view; (B) a side view; (C) bottom view.
Fig. 2 is a schematic view showing a state of an L-shaped battery pack assembled after spot welding.
Fig. 3 is a plan view of the assembled L-shaped battery pack.
Fig. 4 is a schematic view showing a state in which an adhesive tape is attached to a side surface of an assembled L-shaped battery pack.
Fig. 5 is a schematic view of a state in which a paper can is fitted to the outside of the assembled L-shaped battery pack.
FIG. 6 is a schematic view showing a state of manual spot welding in the prior art, (a) a perspective view before spot welding; (b) a side view prior to spot welding; (c) a side view of the spot-welded and shaped L-shaped battery pack; (d) And (3) carrying out spot welding and shaping to obtain a partial enlarged view of the L-shaped battery pack.
Detailed Description
The battery pack with the paper tube is characterized by comprising an L-shaped battery pack formed by a plurality of single cells and the paper tube sleeved outside the L-shaped battery pack.
The L-shaped battery pack obtained by extrusion shaping after automatic F-shaped spot welding is fixed by adopting the paper tube with good hardness, so that the bending degree of the battery pack can be improved, and the short circuit problem caused by the sharp angle of the terminal connecting sheet is avoided.
Next, a specific embodiment of the battery pack according to the present utility model will be described with reference to the drawings.
Fig. 1 is a schematic view showing an arrangement state of a plurality of unit cells in a battery pack with a paper tube according to the present utility model at the time of spot welding, (a) a plan view; (B) a side view; (C) bottom view.
As shown in fig. 1, the L-shaped battery pack of the present utility model is composed of a plurality of single cells (1). First, 10 single cells (1) are arranged in a row so that positive electrode terminals (1 a) and negative electrode terminals (1 b) alternate, and then, the positive electrode terminals (1 a) and the negative electrode terminals (1 b) of adjacent two single cells (1) are connected to both ends of a terminal connection piece (2) by spot welding, respectively.
At this time, because the plurality of single cells (1) are arranged in an F shape, the spot welding process can be performed by an automatic spot welder, and the spot welding precision and the assembly efficiency are greatly improved.
Then, the spot-welded plurality of single cells (1) are straightened, and the terminal connecting pieces (2) are folded in half, and gently pressed to shape, as shown in fig. 2, to form an elongated L-shaped battery pack (3).
Fig. 2 is a schematic view showing a state of an L-shaped battery pack assembled after spot welding. At this time, when the number of the single cells is large, the entire L-shaped battery pack (3) may be bent to a large extent. In the present specification, the maximum distance (mm) that the L-shaped battery pack is radially offset from the axial center is referred to as "overall curvature".
In addition, as shown in the plan view of fig. 3, the side surface of the unit cell (1) has a sharp corner (2 a) of the terminal connecting piece (2) protruding. Since F-type spot welding is alternately performed on the end surfaces and the bottom surfaces of adjacent single cells (1), sharp corners (2 a) of the terminal connecting pieces (2) are exposed on both sides of the L-type battery pack (3) symmetrical with respect to the axis.
After the L-shaped battery pack is extruded and shaped, a paper tube (5) is directly sleeved. The battery pack of the present utility model shown in fig. 5 is formed.
Because the paper tube (5) is made of harder materials and has a certain thickness (for example, 0.5mm thick), the bending of the L-shaped battery pack (3) can be corrected to a certain extent, and the possible damage to the outer package of the battery pack caused by the sharp corner (2 a) of the terminal connecting sheet (2) is relieved.
As shown in fig. 4, it is preferable that an elongated adhesive tape (4) is attached to the side surface of the L-shaped battery pack (3) after extrusion molding before the paper tube (5) is fitted, and the adhesive tape (4) is positioned between the paper tube (5) and the side surface of each cell (1). The L-shaped battery pack (3) after extrusion can be prevented from rebounding in the length direction by attaching the adhesive tape (4) to the side surface of the L-shaped battery pack (3) before the paper tube (5) is sleeved, the overall size of the battery pack is affected, and the L-shaped battery pack (3) can be smoothly put into the paper tube (5).
The adhesive tape (4) is preferably coated on the sharp corners (2 a) of the terminal connecting sheet (2) exposed by folding in half, thereby further ensuring that the outer package of the battery pack is not damaged.
The strip-shaped adhesive tapes (4) can be arranged on one side or more than two sides, and when the two strips are arranged, the strip-shaped adhesive tapes (4) can be respectively arranged on the side surfaces of the two sides of the L-shaped battery pack (3) which are symmetrical relative to the axis.
And finally, sleeving the L-shaped battery pack (3) attached with the adhesive tape into the paper tube (5) to form the battery pack.
In the battery pack with the paper tube, even if the terminal connecting sheet (2) is folded in half and then has a height difference on the end face of the battery, the L-shaped battery pack has certain bending in the length direction, but the overall bending degree of the finally obtained battery pack can be smaller than 1mm due to the fixing and shaping effects of the paper tube.
Moreover, the paper tube can be used for more reliable insulation protection for the short circuit risk possibly caused by the sharp angle of the folded terminal connecting sheet.
Therefore, in the battery pack of the present utility model, the terminal connecting piece and the positive and negative terminals of the single cell can be automatically F-spot welded by the automatic spot welder.
The paper tube (5) covers the entire side surface of the L-shaped battery pack (3), and the thickness of the paper tube (5) is preferably 0.5mm or more, whereby the shaping and fixing effects and the insulating effects on the L-shaped battery pack can be ensured.
In the utility model, the paper tube (5) is made of a harder material, such as kraft paper, and the terminal connecting piece (2) is made of metal, preferably long nickel sheet.
The single cells used in the battery pack of the present utility model are particularly preferably cylindrical cells, in which case the paper can effectively avoid short-circuiting caused by sharp corners of the terminal connection pieces. The unit cell may be a nickel-hydrogen secondary battery or a lithium secondary battery, and is preferably a cylindrical nickel-hydrogen secondary battery or a lithium secondary battery. The number of the single cells is preferably 10 or more, or the length of the assembled L-shaped battery pack is preferably 0.5m or more, and at this time, the shaping and fixing effects of the paper tube can effectively improve the bending degree of the battery pack.
According to different specific applications, the battery pack with the paper tube can be directly put into external equipment for use as is, and can also be further put into use after heat-shrinkable sleeve on the outer side of the paper tube.
According to the battery pack, the shaped L-shaped battery pack is fixed by adopting the paper tube with good hardness, so that the bending degree of the battery pack is effectively improved, the short circuit phenomenon caused by sharp corners of the terminal connecting sheets can be avoided, the overall appearance of the battery pack is kept good, and the battery pack is suitable for products with strict size requirements and safety requirements on the appearance of customers, and particularly, the products with large number of single battery sections and large overall bending degree are easy to cause.
In addition, the battery pack with the paper tube can adopt an automatic spot welder to carry out F-type spot welding, so that the assembly efficiency and the spot welding precision are greatly improved, and the battery pack with the paper tube is suitable for industrial production.
While the battery pack with the paper tube according to the present utility model has been described with reference to the drawings and the embodiments, the present utility model is not limited to the embodiments described above, and various modifications and element changes may be made without departing from the spirit of the present utility model, and these modifications and element changes are also included in the scope of the present utility model.
Claims (10)
1. A battery pack comprising an L-shaped battery pack comprising a plurality of unit cells and a paper tube fitted over the outer side of the L-shaped battery pack, wherein the L-shaped battery pack is formed by arranging the plurality of unit cells in a row with positive and negative terminals alternately, spot-welding positive and negative terminals of two adjacent unit cells at both ends of a terminal connecting sheet, folding the terminal connecting sheet in half, and extruding and shaping the terminal connecting sheet,
the paper tube covers the whole side face of the L-shaped battery pack, the thickness is more than 0.5mm,
the overall curvature of the battery pack is smaller than 1mm.
2. The battery pack according to claim 1, wherein the single cells are cylindrical cells.
3. The battery pack according to claim 1, wherein 1 or more long adhesive tapes are further attached to the side surfaces of the L-shaped battery pack, and the adhesive tapes are positioned between the paper tube and the L-shaped battery pack.
4. The battery pack according to claim 3, wherein the two adhesive tapes are respectively positioned at two sides of the L-shaped battery pack which are symmetrical with respect to the axis.
5. The battery pack according to claim 3, wherein the adhesive tape covers sharp corners of the terminal connection sheet exposed by folding in half.
6. The battery pack according to any one of claims 1 to 5, wherein the number of the single cells is 10 or more.
7. The battery pack according to any one of claims 1 to 5, wherein the L-shaped battery pack has a length of 0.5m or more.
8. The battery according to any one of claims 1 to 5, wherein the paper can is made of kraft paper and the terminal connection sheet is made of metallic nickel sheet.
9. The battery pack according to any one of claims 1 to 5, wherein the spot welding is F-type spot welding using an automatic spot welder.
10. The battery pack according to any one of claims 1 to 5, wherein the single cell is a nickel-hydrogen secondary battery or a lithium secondary battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320674988.4U CN219739150U (en) | 2023-03-31 | 2023-03-31 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320674988.4U CN219739150U (en) | 2023-03-31 | 2023-03-31 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219739150U true CN219739150U (en) | 2023-09-22 |
Family
ID=88058223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320674988.4U Active CN219739150U (en) | 2023-03-31 | 2023-03-31 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219739150U (en) |
-
2023
- 2023-03-31 CN CN202320674988.4U patent/CN219739150U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |