CN221574174U - Current collecting disc and cylindrical battery - Google Patents
Current collecting disc and cylindrical battery Download PDFInfo
- Publication number
- CN221574174U CN221574174U CN202323161067.7U CN202323161067U CN221574174U CN 221574174 U CN221574174 U CN 221574174U CN 202323161067 U CN202323161067 U CN 202323161067U CN 221574174 U CN221574174 U CN 221574174U
- Authority
- CN
- China
- Prior art keywords
- disk
- disc
- disk body
- winding core
- current collecting
- 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 52
- 238000004804 winding Methods 0.000 claims abstract description 46
- 238000005452 bending Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 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)
Abstract
The utility model discloses a current collecting disc and a cylindrical battery, wherein the current collecting disc comprises a disc body used for being welded with a winding core and a mounting part used for being welded with a battery top cover, a welding area which is coincident with the diameter of the winding core is arranged on the disc body, the disc body is provided with a first disc body and a second disc body which is connected with the first disc body, one end of the welding area is positioned on the first disc body, the other end of the welding area is positioned on the second disc body, the first disc body is connected with the mounting part by virtue of a bendable bending part, a groove is arranged on the mounting part, an opening of the groove is flush with the bending part, the second disc body stretches into the groove, a gap is reserved between the second disc body and the groove, and the mounting part is bent relative to the first disc body at the bending part. Because the second disk body is hollowed out with the groove, the mounting part enables the second disk body to pass through the groove after being bent at the bending part, so that the welding track between the current collecting disk and the winding core penetrates through the inner ring to the outer ring of the full tab, and the cylindrical battery can achieve both multiplying power charging and discharging performance and extremely low cost.
Description
Technical Field
The utility model belongs to the technical field of cylindrical batteries, and particularly relates to a current collecting disc and a cylindrical battery.
Background
The lithium ion/sodium ion cylindrical battery has the advantages of high energy density, good capacity consistency, capability of supporting high-rate charge and discharge and the like, so that the cylindrical battery gradually becomes a main stream product in the new energy industry, and more manufacturers continuously pursue optimization of the structural compactness of the cylindrical battery to improve the energy density.
In the prior art, a rolling core of a cylindrical lithium ion battery is manufactured by a full-lug rolling process, after rolling is completed, a current collecting disc is respectively welded with an anode end face and a cathode end face of the rolling core and a top cover of the battery by laser, wherein when the top cover of the battery is welded with the current collecting disc, the current collecting disc is required to be folded in an L shape, so that a welding track of the current collecting disc and the rolling core cannot penetrate through an inner ring to an outer ring of the full-lug, battery multiplying power charging and discharging performance is poor, and safety risks are brought to local overhigh temperature rise in the battery. In addition, the existing current collecting disc is complex in structure, and more metal materials are used, so that the production cost of the battery is high.
Therefore, there is a need for a current collecting tray and a cylindrical battery to solve the problems of the prior art.
Disclosure of utility model
The utility model aims to provide a current collecting disc which is used for a cylindrical battery and can ensure that the cylindrical battery has both multiplying power charge and discharge performance and extremely low cost.
Another object of the present utility model is to provide a cylindrical battery that can achieve both rate charge and discharge performance and extremely low cost.
In order to achieve the above purpose, the utility model provides a current collecting tray for electric connection between a battery top cover and a winding core, comprising a tray body for welding with the winding core and a mounting part for welding with the battery top cover, wherein the tray body is provided with a welding area overlapped with the diameter of the winding core, the tray body is provided with a first tray body and a second tray body connected with the first tray body, one end of the welding area is positioned on the first tray body, the other end of the welding area is positioned on the second tray body, the first tray body is connected with the mounting part by a bendable bending part, the mounting part is provided with a groove, an opening of the groove is flush with the bending part, the second tray body stretches into the groove, a gap is reserved between the second tray body and the groove, and the mounting part bends relative to the first tray body at the bending part to enable the second tray body to pass through the groove.
Compared with the prior art, the welding area of the current collecting disc is overlapped with the diameter of the winding core, two ends of the welding area are respectively arranged on the first disc body and the second disc body, the first disc body is connected with the mounting part through the bendable bending part, the mounting part is provided with the groove, the opening of the groove is flush with the bending part, the second disc body stretches into the groove, and a gap is reserved between the second disc body and the groove, so that the current collecting disc is applied to a cylindrical battery, when the top cover of the battery is welded with the mounting part, the mounting part is bent relative to the first disc body at the bending part, and the second disc body passes through the groove due to the hollow shape between the second disc body and the groove, so that the welding area on the disc body is overlapped with the diameter of the winding core, namely, the welding track of the current collecting disc and the winding core can penetrate through the inner ring of the whole electrode lug to the outer ring, and the cylindrical battery can achieve both multiplying power charging and discharging performance and safety. Meanwhile, the current collecting disc has a simple structure and less metal material, so that the cylindrical battery has extremely low cost.
Preferably, the shape of the second disc body is matched with the groove.
Preferably, the groove of the present utility model is U-shaped. In particular, the shape of the second tray is U-shaped, which makes the second tray as close to the battery case as possible in order to maximize the current collecting effect.
Preferably, the current collecting disc is in a strip shape, so that the structure of the current collecting disc is further simplified, and metal materials are saved, thereby further reducing the manufacturing cost of the cylindrical battery and further improving the economic value.
Preferably, the end part of the first disc body far away from the second disc body is arc-shaped and matched with the winding core. This brings the first disk as close as possible to the battery case in order to maximize the current collecting effect.
Preferably, the width of the second tray body of the utility model is less than 1/2 of the width of the collecting tray. The arrangement can enable the welding track to penetrate through the inner ring to the outer ring of the full tab, and the welding of the mounting part and the battery top cover is not affected.
Preferably, a round hole which is used for being concentrically arranged with the central hole of the winding core is arranged on the first disc body, and the round hole divides the welding area into two parts. If the disc body is welded at a place where the disc body is not contacted with the winding core (namely, the central hole of the winding core), the disc body can be broken, so that a welding area is divided into two parts by adopting a round hole, and the central hole of the winding core can be avoided, so that the first disc body can be prevented from being broken during welding.
Preferably, the aperture of the round hole is larger than that of the central hole of the winding core.
Preferably, the welding area of the present utility model is linear or spiral.
Preferably, the tray body and the mounting part are made of the same material and are of an integrated structure. Specifically, the tray body and the mounting portion may be made of copper, nickel or aluminum.
In order to achieve the above object, the present utility model further provides a cylindrical battery, including a battery top cover and a winding core, and further includes the above-mentioned current collecting disc, wherein the current collecting disc is located between the battery top cover and the winding core, a welding area of the disc body is welded with the winding core, an installation portion is welded with the battery top cover, and the installation portion is bent at a bending portion relative to the first disc body to enable the second disc body to pass through the groove.
Compared with the prior art, the mounting part of the cylindrical battery is bent relative to the first disk body at the bending part, and the second disk body passes through the groove due to the clearance between the second disk body and the groove, so that the welding area on the disk body is still coincident with the diameter of the winding core, namely, the welding track of the current collecting disk and the winding core can penetrate through the inner ring to the outer ring of the full tab, and the cylindrical battery can achieve both multiplying power charge-discharge performance and extremely low cost.
Drawings
Fig. 1 is a schematic structural view of a cylindrical battery according to the present utility model.
Fig. 2 is a schematic structural view of welding a current collecting disc and a winding core according to the present utility model.
Fig. 3 is a schematic structural view of the mounting portion of the present utility model after being bent relative to the first disc at the bending portion.
Fig. 4 is a schematic view of the structure of the welded current collecting tray and winding core of the present utility model incorporated into a battery case.
Fig. 5 is a schematic structural view of the current collecting plate of the present utility model.
Detailed Description
In order to describe the technical content, constructional features and effects of the present utility model in detail, the following description is made with reference to the accompanying drawings in detail in conjunction with the detailed description.
Referring to fig. 1 to 3, the present utility model provides a cylindrical battery 100, which includes a battery top cover 11 and a winding core 12, and further includes a current collecting disc 13, wherein the current collecting disc 13 is located between the battery top cover 11 and the winding core 12, a welding area 1313 of a disc body 131 is welded to the winding core 12, a mounting portion 132 is welded to the battery top cover 11, and the mounting portion 132 is bent at a bending portion 133 relative to a first disc 1311 to enable a second disc 1312 to pass through a groove 14. The mounting portion 132 of the cylindrical battery 100 of the present utility model is bent at the bending portion 133 relative to the first disc 1311, and a gap 15 is formed between the second disc 1312 and the groove 14, i.e. the second disc 1312 and the groove 14 are hollowed out, so that the second disc 1312 passes through the groove 14, and the welding area 1313 on the disc 131 is still coincident with the diameter of the winding core 12, i.e. the welding track of the current collecting disc 13 and the winding core 12 can pass through the inner ring to the outer ring of the full tab, so that the cylindrical battery 100 can achieve both the rate charge-discharge performance and the extremely low cost.
Specifically, the specific assembly process of the cylindrical battery 100 of the present utility model is: after the full tab of the winding core 12 is subjected to rubbing or patting pretreatment, the full tab of the winding core 12, a first disk body 1311 and a second disk body 1312 of the current collecting disk 13 are subjected to laser welding and fixing as shown in fig. 2; then, as shown in fig. 3, the mounting portion 132 of the current collecting tray 13 is bent at the bending portion 133 in an L shape relative to the first tray 1311, and then the welded current collecting tray 13 and the winding core 12 are assembled into the battery case 111; then, as shown in fig. 4, the mounting portion 132 is welded to the battery top cover 11; finally, the battery top cover 11 is pressed down to form a Z-shaped bend, so that the mounting part 132 and the first disc 1311 are parallel to each other and sealed.
Referring to fig. 4 to 5, the current collecting tray 13 of the present utility model is used for electrically connecting the battery top cover 11 and the winding core 12, and includes a tray body 131 for welding with the winding core 12 and a mounting portion 132 for welding with the battery top cover 11, wherein a welding area 1313 overlapping with the diameter of the winding core 12 is disposed on the tray body 131, the tray body 131 has a first tray body 1311 and a second tray body 1312 connected with the first tray body 1311, one end of the welding area 1313 is disposed on the first tray body 1311, the other end of the welding area 1313 is disposed on the second tray body 1312, the first tray body 1311 is connected with the mounting portion 132 by a bendable bending portion 133, a groove 14 is disposed on the mounting portion 132, an opening 141 of the groove 14 is flush with the bending portion 133, the second tray body 1312 extends into the groove 14, and a gap 15 is disposed between the second tray body 1312 and the groove 14, and the mounting portion 132 is bent relative to the first tray body 1311 at the bending portion 133 to enable the second tray body 1312 to pass through the groove 14. Therefore, when the current collecting plate 13 of the present utility model is applied to the cylindrical battery 100, the mounting portion 132 is bent relative to the first plate 1311 at the bending portion 133 when the battery top cover 11 is welded to the mounting portion 132, and the second plate 1312 passes through the groove 14 due to the hollow shape between the second plate 1312 and the groove 14, so that the welding area 1313 on the plate 131 is still coincident with the diameter of the winding core 12, i.e. the welding track of the current collecting plate 13 and the winding core 12 can pass through the inner ring to the outer ring of the full tab, thereby making the cylindrical battery 100 capable of taking the rate charge and discharge performance and extremely low cost into consideration.
With continued reference to fig. 5, the second disc 1312 of the present utility model has a shape that matches the shape of the recess 14. Preferably, the recess 14 of the present utility model is U-shaped. Specifically, the shape of the second tray 1312 is U-shaped, which allows the second tray 1312 to be as close to the battery case 111 as possible in order to maximize the current collecting effect. At the same time, the end of the first disc 1311 far from the second disc 1312 is arc-shaped to be matched with the winding core 12, which makes the first disc 1311 as close to the battery case 111 as possible, so as to further maximize the current collecting effect. Further, the collecting tray 13 is in a long strip shape, which simplifies the structure of the collecting tray 13 and saves metal materials, thereby reducing the manufacturing cost of the cylindrical battery 100 and further improving the economic value. In addition, in order to enable the welding track of the current collecting disc 13 and the winding core 12 to penetrate through the inner ring to the outer ring of the full tab without affecting the welding of the mounting part 132 and the battery top cover 11, the width W of the second disc 1312 of the present utility model is smaller than 1/2 of the width L of the current collecting disc 13.
With continued reference to fig. 2-5, a first disc 1311 of the present utility model has a circular hole 17 disposed concentrically with the central hole 16 of the winding core 12, the circular hole 17 dividing the welding area 1313 into two parts. If the disc 131 is welded where it is not in contact with the winding core 12 (i.e. the central hole 16 of the winding core 12), the disc 131 breaks down, so that the welding area 1313 is divided into two parts by the circular hole 17 to avoid breaking down the first disc 1311 during welding. More specifically, the aperture of the circular hole 17 is slightly larger than the aperture of the central hole 16 of the winding core 12.
With continued reference to fig. 2-5, the welding area 1313 of the present utility model is linear, and more specifically, the welding area 1313 may be formed by one or more welding lines, and the welding may be a laser spot welding or a laser continuous welding, and in addition, the welding area 1313 of the present utility model may also be a spiral. Further, the tray 131 and the mounting portion 132 are made of the same material and are integrally formed. Specifically, the material of the tray body 131 and the mounting portion 132 may be copper, nickel or aluminum, and the material of the tray body 131 and the mounting portion 132 is not limited thereto, but may be other metal materials, such as copper-nickel composite materials.
The foregoing disclosure is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, as it is intended to cover all modifications which fall within the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. The utility model provides a current collecting disc for electric connection between battery top cap and the core is rolled up, its characterized in that, including be used for with roll up core welded disk body and be used for with the installation department of battery top cap welded, be equipped with on the disk body with roll up core diameter coincidence's welding area, the disk body have first disk body and with the second disk body that first disk body is connected, welding area's one end is located on the first disk body, welding area's the other end is located on the second disk body, the first disk body is connected with the installation department by a kink that can buckle, be equipped with the recess on the installation department, the opening of recess flushes in the kink, the second disk body stretches into in the recess just the second disk body with have the clearance between the recess, the installation department in the kink department is relative first disk body is buckled and makes the second disk body passes the recess.
2. The manifold disk of claim 1 wherein said second disk body is shaped to match said recess.
3. The manifold disk of claim 1 wherein said recess is U-shaped.
4. The manifold disk of claim 1 wherein said disk is elongated.
5. The manifold disk of claim 4, wherein the end of said first disk body remote from said second disk body is arcuate to accommodate said winding core.
6. The manifold disk of claim 4 wherein the width of said second disk body is less than 1/2 the width of said manifold disk.
7. The manifold disk of claim 1, wherein said first disk body has a circular hole disposed concentrically with a central hole of said winding core, said circular hole dividing said welding area into two parts.
8. The manifold of claim 1 wherein said weld area is linear or spiral.
9. The manifold disk of claim 1, wherein said disk body and said mounting portion are of the same material and are of unitary construction.
10. A cylindrical battery comprising a battery top cover and a winding core, and further comprising a current collecting disc according to any one of claims 1 to 9, wherein the current collecting disc is located between the battery top cover and the winding core, a welding area of the disc body is welded with the winding core, the mounting part is welded with the battery top cover, and the mounting part is bent at the bending part relative to the first disc body to enable the second disc body to pass through the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323161067.7U CN221574174U (en) | 2023-11-22 | 2023-11-22 | Current collecting disc and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323161067.7U CN221574174U (en) | 2023-11-22 | 2023-11-22 | Current collecting disc and cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221574174U true CN221574174U (en) | 2024-08-20 |
Family
ID=92289722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323161067.7U Active CN221574174U (en) | 2023-11-22 | 2023-11-22 | Current collecting disc and cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221574174U (en) |
-
2023
- 2023-11-22 CN CN202323161067.7U patent/CN221574174U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |