CN214254656U - Connecting sheet for cylindrical battery without pole lugs - Google Patents
Connecting sheet for cylindrical battery without pole lugs Download PDFInfo
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- CN214254656U CN214254656U CN202120113232.3U CN202120113232U CN214254656U CN 214254656 U CN214254656 U CN 214254656U CN 202120113232 U CN202120113232 U CN 202120113232U CN 214254656 U CN214254656 U CN 214254656U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of the lithium cell technique and specifically relates to indicate a connection piece for no utmost point ear cylinder battery, including current collection dish disk body, connector and the outage device afterbody, the connector both ends respectively with current collection dish disk body and outage device afterbody are connected, and current collection dish disk body is provided with the groove structure of symmetry and intercommunication, and the connector all is provided with folding spacing groove with the junction of current collection dish disk body, connector and the junction of outage device afterbody. The collector disc body is provided with the symmetrical and communicated groove structures, so that a welding position closer to a central hole of a winding core can be obtained, the uniformity and the welding area of a flat lug surface welding point are improved, the internal resistance is reduced, the current conducting effect is improved, and the high-power performance is improved; the connecting body is provided with a folding limiting groove, the folding limiting groove enables the folding process of the connecting sheet to be controllable, the short circuit of the connecting sheet is prevented, and the safety performance of the battery cell is improved; and the folding limiting groove can be used as a fool-proof hole to prevent assembly errors when the connecting sheet is connected with the turnover sheet.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell technique and specifically relates to indicate a connection piece for having no utmost point ear cylinder battery.
Background
With the mandatory national standard (GB17761-2018) of electric bicycle safety technical Specification enforced from 2019, 4 and 15 days, the standard requires that the frame weight of the electric bicycle is controlled below 39kg, a lithium ion battery with lighter weight and higher energy density becomes the main choice of the electric bicycle, and a cylindrical lithium ion battery is the most important choice due to the flexible grouping property of the lithium ion battery. The cylindrical aluminum shell battery has light weight and high energy density, and is the mainstream development direction; the cylindrical aluminum shell is mostly assembled in a mode without a pole lug due to the structural particularity, and then is connected with the battery cell through the current collecting disc to rub and level the pole lug and the cover plate pole, so that a current path is formed.
Patent CN105810875 discloses a circular current collecting disc for lithium ion battery, which is used for dividing the disc body into a plurality of sector areas with equal areas by arranging a plurality of convex strips on the surface of the disc body, wherein the convex strips are radially and uniformly distributed from the center of the disc body to the outside; the rear end of the tray body is provided with a tail body which can be bent and is connected with the cover plate pole; patent CN109360932 discloses a current collecting disc for a cylindrical all-polar ear lithium ion battery, wherein a through-type V-shaped groove is symmetrically arranged on the current collecting disc in a mirror image manner, the surface of the V-shaped groove is a welding spot position for laser welding, and a first round hole and a second round hole for liquid injection are arranged along a symmetrical direction on an X-shaped disc body with left and right V-shaped grooves which are not communicated; the tail body which can be bent is arranged at the rear end of the tray body, the tail body is detachably connected or riveted to the cover plate, and two reinforcing ribs which are consistent with the symmetrical direction of the tray body are arranged on the tail body; however, the current collecting plates are connected with the poles, and the cover plate formed by assembling the current collecting plates has no safety problem blocking measures such as overcharge prevention, short circuit prevention and the like, so that the safety performance is poor; and because the width, the folding length, the diameter of the current collecting disc and the like of the connecting section of the current collecting disc are large, the folding assembly is easy to touch the shell wall and the battery cell to cause short circuit, and the safety of the battery is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to overcome the defects existing in the prior art and provide a connecting sheet for a cylindrical battery without a lug.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a connection piece for no utmost point ear cylinder battery, includes current collection dish disk body, connector and outage device afterbody, the connector both ends respectively with current collection dish disk body with outage device afterbody is connected, current collection dish disk body is provided with the groove structure of symmetry and intercommunication, the connector with the junction of current collection dish disk body the connector with the junction of outage device afterbody all is provided with folding spacing groove.
The groove structure is an X-shaped groove.
The X-shaped groove of the groove structure divides the collector plate body into four fan-shaped areas on average, and the four fan-shaped areas are provided with a first air guide hole respectively.
The diameters of circles where the centers of the four first air guide holes are located are respectively larger than the width of the connecting body and the diameter of the tail body of the power-off device.
The connector is provided with at least two reinforcing ribs.
The folding limiting groove is arranged at the end part of the reinforcing rib.
The power-off device tail body is round, and the power-off device tail body is provided with at least two second air guide holes which are evenly distributed along the circumferential direction.
And a blind hole is formed in the center of the tail body of the power-off device.
And a power-off reticle is arranged at the periphery of the blind hole.
And a through hole is formed in the center of the groove structure.
The utility model discloses a current collecting disc disk body is provided with symmetrical and connected groove structure, can obtain the welding position that is closer to the core centre bore of roll up, improves and rubs flat utmost point ear face welding point homogeneity and welding area, reduces the internal resistance, improves the electric current effect, promotes high power performance; folding limiting grooves are formed in the connecting part of the connecting body and the current collecting disc body and the connecting part of the connecting body and the power-off device tail body, the folding limiting grooves enable the folding process of the connecting sheet to be controllable, the short circuit of the connecting sheet is prevented, and the safety performance of the battery cell is improved; and the folding limiting groove can be used as a fool-proof hole to prevent assembly errors when the connecting sheet is connected with the turnover sheet.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
In fig. 1 and 2 include: 1-collecting tray body, 11-groove structure, 12-first air guide hole, 13-through hole, 2-connecting body, 21-folding limiting groove, 22-reinforcing rib, 3-power-off device tail body, 31-second air guide hole, 32-blind hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a connecting sheet for a cylindrical battery without a tab comprises a current collecting disc body 1, a connecting body 2 and a power-off device tail body 3, wherein two ends of the connecting body 2 are respectively connected with the current collecting disc body 1 and the power-off device tail body 3, the current collecting disc body 1 is provided with symmetrical and communicated groove structures 11, and the connecting part of the connecting body 2 and the current collecting disc body 1 and the connecting part of the connecting body 2 and the power-off device tail body 3 are provided with folding limiting grooves 21.
Preferably, groove structure 11 sets up to X type recess, and X type recess intercommunication improves and rubs flat utmost point ear face welding point homogeneity and welding area in order to obtain the welding position that more is close to the core centre bore of rolling up, reduces the internal resistance, improves the current conduction effect, satisfies the high rate performance demand.
Preferably, the X-shaped groove of the groove structure 11 equally divides the collector tray body 1 into four fan-shaped regions, and the four fan-shaped regions are respectively provided with a first gas guide hole 12, so that when the battery fails and generates a large amount of gas, the gas can be guided out from the first gas guide hole 12 in time.
Preferably, the diameters of circles with the centers of the four first air guide holes 12 are respectively larger than the width of the connecting body 2 and the diameter of the tail body 3 of the power-off device, and the design can obtain better air guide capacity.
Preferably, the connector 2 is provided with at least two ribs 22, and the ribs 22 increase the strength of the connector 2 to ensure the stability of the assembly process of the cover plate and the battery.
Preferably, the folding limiting groove 21 is arranged at the end part of the reinforcing rib 22, and the folding limiting groove 22 enables the folding process of the connecting sheet to be controllable, prevents the connecting sheet from short circuit, and improves the safety performance of the battery cell; and the folding limiting groove 22 can be used as a fool-proof hole to prevent assembly errors when the connecting sheet is connected with the turnover sheet.
Preferably, the tail body 3 of the power-off device is circular and is connected to the rear end of the connecting body 2, and a current blocking structure can be formed after the tail body is welded with the cover plate turnover piece, when safety problems such as overcharge and short circuit of the battery occur, a large amount of gas is generated inside the battery, the cover plate turnover piece is turned over, the tail body 3 of the power-off device is broken to form an open circuit, a current path is blocked in time, and the safety performance of the battery is greatly improved; the power cutoff device tail body 3 is provided with at least two second air guide holes 31 which are evenly distributed along the circumferential direction.
Preferably, the center of the tail body 3 of the power-off device is provided with a blind hole 32, and the blind hole 32 is arranged for facilitating welding with the turnover sheet.
Preferably, the blind hole 32 is provided with a current-breaking score line on its periphery for the purpose of: when safety problems such as overcharge and short circuit of the battery occur, a large amount of gas is generated inside, the cover plate turnover piece is turned over, and the tail body 3 of the power-off device is broken to form an open circuit.
Preferably, the center of the groove structure 11 is provided with a through hole 13, and the through hole 13 can be used for liquid injection and air guide.
The above detailed description is directed to specific illustrations of possible embodiments of the present invention, which are not intended to limit the scope of the invention, but rather are intended to be covered by the scope of the invention in any equivalent implementation or modification that does not depart from the spirit of the invention.
Claims (10)
1. The utility model provides a connection piece for no utmost point ear cylinder battery, includes current-collecting tray disk body, connector and outage device afterbody, the connector both ends respectively with current-collecting tray disk body with outage device afterbody connects its characterized in that: the current collecting disc body is provided with symmetrical and communicated groove structures, and folding limiting grooves are formed in the connection position of the connector and the current collecting disc body and the connection position of the connector and the power-off device tail body.
2. The tab for a tab-less cylindrical battery of claim 1, wherein: the groove structure is an X-shaped groove.
3. The tab for a tab-less cylindrical battery of claim 2, wherein: the X-shaped groove of the groove structure divides the collector plate body into four fan-shaped areas on average, and the four fan-shaped areas are provided with a first air guide hole respectively.
4. The tab for a tab-less cylindrical battery of claim 3, wherein: the diameters of circles where the centers of the four first air guide holes are located are respectively larger than the width of the connecting body and the diameter of the tail body of the power-off device.
5. The tab for a tab-less cylindrical battery of claim 1, wherein: the connector is provided with at least two reinforcing ribs.
6. The tab for a tab-less cylindrical battery of claim 5, wherein: the folding limiting groove is arranged at the end part of the reinforcing rib.
7. The tab for a tab-less cylindrical battery of claim 1, wherein: the power-off device tail body is round, and the power-off device tail body is provided with at least two second air guide holes which are evenly distributed along the circumferential direction.
8. The tab for a tab-less cylindrical battery of claim 1, wherein: and a blind hole is formed in the center of the tail body of the power-off device.
9. The tab for a tab-less cylindrical battery of claim 8, wherein: and a power-off reticle is arranged at the periphery of the blind hole.
10. The tab for a tab-less cylindrical battery of claim 1, wherein: and a through hole is formed in the center of the groove structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120113232.3U CN214254656U (en) | 2021-01-15 | 2021-01-15 | Connecting sheet for cylindrical battery without pole lugs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120113232.3U CN214254656U (en) | 2021-01-15 | 2021-01-15 | Connecting sheet for cylindrical battery without pole lugs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214254656U true CN214254656U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120113232.3U Active CN214254656U (en) | 2021-01-15 | 2021-01-15 | Connecting sheet for cylindrical battery without pole lugs |
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| Country | Link |
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| CN (1) | CN214254656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284644A (en) * | 2021-12-22 | 2022-04-05 | 远景动力技术(江苏)有限公司 | Switching structure and contain its full utmost point ear book core, full utmost point ear battery |
-
2021
- 2021-01-15 CN CN202120113232.3U patent/CN214254656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284644A (en) * | 2021-12-22 | 2022-04-05 | 远景动力技术(江苏)有限公司 | Switching structure and contain its full utmost point ear book core, full utmost point ear battery |
| CN114284644B (en) * | 2021-12-22 | 2024-02-20 | 远景动力技术(江苏)有限公司 | Switching structure and full-tab winding core and full-tab battery comprising same |
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