CN214625311U

CN214625311U - Multi-tab cylindrical battery with current collecting disc

Info

Publication number: CN214625311U
Application number: CN202120775449.0U
Authority: CN
Inventors: 王正伟; 丁坤; 刘付召; 徐军伟
Original assignee: Phylion Battery Co Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-05
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a multi-tab cylindrical battery with current collecting disc, the battery roll core comprises a positive pole piece, a diaphragm and a negative pole piece, the positive pole piece comprises a first coating area and a first blank area, a plurality of positive lugs are arranged on the first blank area at intervals, the intervals of the positive lugs are convenient to adjust, the tail body comprises a first bending part, a second bending part and a liquid injection groove, the first bending part is formed by bending the tail body along the connecting part of the tail body and the disc body towards the direction close to the disc body, the second bending part is formed by bending the tail body along the middle shaft of the liquid injection groove towards the direction far away from the disc body, the cover plate is connected with the second bending part, the influence on the service life of the tail body in the bending process is reduced, the service life of the tail body is prolonged, good economic benefit is achieved, the disc body comprises an insulating flange, insulating flange includes the joint piece, can roll up the core cooperation with the battery for the current collecting dish rolls up the connection effect of core with the battery better.

Description

Multi-tab cylindrical battery with current collecting disc

Technical Field

The utility model relates to the technical field of batteries, concretely relates to multi-tab cylindrical battery who contains current collecting disc.

Background

The conventional multi-tab battery needs to design the coating interval in advance, and the welding position of the tab cannot be adjusted after the tab is coated, so that the applicability is poor.

The current collecting disc related to the Chinese patent CN105826597A is provided with a tail body which is arranged into a strip shape and can be bent and connected with a cover plate, and due to the existence of metal stress, the tail body can generate metal fatigue in the bending process, and metal fracture can be caused in serious cases to further influence the flow guiding effect;

in order to solve the above problems, in chinese patent CN109360932A, a mode of providing a reinforcing rib on the tail body is adopted, which can prevent the metal from breaking to some extent and increase the strength of the tail body, but still can not completely avoid the risk of tail body breaking during the bending process.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide a multi-tab cylindrical battery with a current collecting disc, which is convenient for adjusting the position of a tab and prolonging the service life of the tail body of the current collecting disc, and has the advantages of simple and convenient operation and strong practicability.

In order to achieve the above purpose, the utility model discloses a technical scheme is: the utility model provides a multi-tab cylindrical battery who contains current collection dish, includes that battery rolls up core, current collection dish, insulating sealing washer, apron, safety valve subassembly and casing, battery rolls up the core and sets up in the casing, battery rolls up core and includes positive pole piece, diaphragm and negative pole piece, the diaphragm clamp is established between positive pole piece and the negative pole piece, insulating sealing washer sets up current collection dish with between the casing, current collection dish includes disk body and afterbody, be equipped with the through-hole on the disk body, current collection dish passes through the disk body sets up the both sides tip of battery roll core, the apron passes through current collection dish with battery rolls up the core and is connected, be equipped with on the apron with through-hole complex annotates the liquid hole, safety valve subassembly sets up on annotating the liquid hole, positive pole piece includes first coating area and first blank area, first blank area surpasss the upper end of diaphragm, the negative pole piece comprises a second coating area and a second blank area, the second blank area exceeds the lower end of the diaphragm, a plurality of positive lugs are arranged on the first blank area at intervals, the positive pole piece is wound, the positive lugs are overlapped with the same side of the positive pole piece, the tail body comprises a first bending part, a second bending part and a liquid injection groove, the first bending part is formed by bending the tail body along the joint of the tail body and the disk body towards the direction close to the disk body, the second bending part is formed by bending the tail body along the shaft L of the liquid injection groove towards the direction far away from the disk body, the liquid injection groove is arranged to be a through groove, the liquid injection groove is matched with the liquid injection hole, the cover plate is connected with the second bending part, the disk body comprises an insulating flange, one side of the insulating flange close to the battery roll core is provided with a clamping part, the clamping piece is matched with the battery roll core.

Preferably, one side of the second bending part, which is far away from the first bending part, is provided with a clamping block, and one side of the cover plate, which is close to the current collecting disc, is provided with a clamping groove matched with the clamping block.

Preferably, the periphery of the through hole is provided with a convex part, the convex part is higher than the surface of the tray body, and the convex part is matched with the liquid injection hole of the cover plate.

Preferably, the relief valve subassembly includes valve block and block, the valve block include with annotate liquid hole complex bulge, the block with the valve block cooperation will the valve block holds wherein.

Preferably, the plurality of positive electrode lugs are arranged on the first blank area in a welding mode.

Preferably, the axis L is a symmetry axis of the liquid injection groove.

Preferably, the second blank area is formed into a full tab negative electrode by a square kneading method.

Preferably, a plurality of negative electrode tabs are arranged on the second blank area at intervals.

Preferably, the plurality of negative electrode tabs are arranged on the second blank area by welding.

Preferably, the first coating region and the second coating region are formed by a full coating manner.

Compared with the prior art, the utility model has the advantages that the first blank area is provided with the plurality of positive lugs at intervals, so that the gap of the positive lugs can be conveniently adjusted according to the winding condition of the positive pole piece, and the positive lugs are arranged on the first blank area after the interval is calculated, thereby having more convenient operation and stronger practicability; the first bending part and the second bending part are arranged on the tail body of the current collecting disc, and the second bending part is connected with the cover plate, so that the tail body is not required to be bent in the process of being connected with the cover plate, the processing efficiency is improved, and the service life of the tail body is prolonged; the disk body includes insulating flange, and one side that insulating flange is close to the battery and rolls up the core is equipped with the joint spare for current collecting dish and battery roll up the connection effect of core better, promote life.

Drawings

FIG. 1 is a schematic view of the overall structure of a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of a battery roll core according to a preferred embodiment of the present invention;

fig. 3 is a schematic view of a tab structure of a battery roll core according to a preferred embodiment of the present invention;

fig. 4 is a schematic view of a tab structure of a battery roll core according to another preferred embodiment of the present invention;

fig. 5 is a schematic view of the positive electrode sheet after being wound by the battery roll core according to a preferred embodiment of the present invention;

FIG. 6 is a partial schematic view of a preferred embodiment of the present invention;

fig. 7 is a top view of a current collecting plate according to a preferred embodiment of the present invention;

fig. 8 is a schematic structural view of a current collecting plate according to a preferred embodiment of the present invention;

fig. 9 is a side view of a current collecting plate according to a preferred embodiment of the present invention;

fig. 10 is a schematic structural view of a through hole according to a preferred embodiment of the present invention.

In the figure:

1. a battery roll core; 11. a positive electrode plate; 111. a first coating zone; 112. a first blank area; 113. a positive tab; 12. a diaphragm sheet; 13. a negative pole piece; 131. a second coating zone; 132. a second blank area; 133. A negative tab; 2. a current collecting plate; 21. a tray body; 211. a through hole; 212. a male member; 22. a tail body; 221. a first bending portion; 222. a second bending portion; 23. a liquid injection groove; 24. a clamping block; 25. an insulating flange; 251. a clamping piece; 3. an insulating seal ring; 4. a cover plate; 41. a liquid injection hole; 5. a valve plate; 51. a projection; 6. and (7) capping.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

As shown in fig. 1 to 10, the multi-tab cylindrical battery with a current collecting disc in the embodiment includes a battery roll core 1, a current collecting disc 2, an insulating seal ring 3, a cover plate 4, a safety valve assembly and a casing, wherein the battery roll core 1 is disposed in the casing, the insulating seal ring 3 is disposed between the current collecting disc 2 and the casing, and the safety valve assembly includes a valve plate 5 and a cap 6.

As shown in fig. 2, the battery roll core 1 includes a positive electrode tab 11, a separator 12 and a negative electrode tab 13, the separator 12 is sandwiched between the positive electrode tab 11 and the negative electrode tab 13, and the positive electrode tab 11, the separator 12 and the negative electrode tab 13 are wound to form the battery roll core 1.

The positive electrode plate 11 includes a first coated area 111 and a first blank area 112, and the negative electrode plate 13 includes a second coated area 131 and a second blank area 132, the first blank area 112 extending beyond the upper end of the separator sheet 12, and the second blank area 132 extending beyond the lower end of the separator sheet 12.

Preferably, the first coating region 111 and the second coating region 131 are formed using a full coating process.

The utility model discloses an embodiment, as shown in fig. 3, the interval is equipped with a plurality of anodal ears 113 on first blank 112, and the interval is equipped with a plurality of negative pole ears 133 on the blank 132 of second, compares in the method of intermittent type formula coating preparation multi-tab battery and the preparation multi-tab battery of mode of cutting, the utility model discloses can be according to actual need, adjust the interval of anodal ear 113 on first blank 112 and/or negative pole ear 133 on the blank 132 of second for a plurality of utmost point ears can be located same one side after convoluteing, easy operation, convenient the regulation.

In another embodiment of the present invention, as shown in fig. 4, a plurality of positive electrode tabs 113 are spaced on the first blank area 112, and the second blank area 132 is formed with a negative electrode full-tab by a square kneading method.

Preferably, the plurality of positive electrode tabs 113 are disposed on the first margin 112 by welding.

Preferably, the plurality of negative electrode tabs 133 are disposed on the second margin 132 by welding.

As shown in fig. 5, after the positive electrode tab 11 is wound, the positive electrode tabs 113 are located on the same side and are overlapped, and the negative electrode tab 13 is also arranged, and after the negative electrode tab 13 is wound, the negative electrode tabs 133 are located on the same side and are overlapped.

As shown in fig. 6 and 10, the collecting tray 2 includes a tray body 21 and a tail body 22, a through hole 211 is provided on the tray body 21, other configurations of the tray body 21 are conventionally provided in the field, the tail body 22 includes a first bending portion 221 and a second bending portion 222, the first bending portion 221 is formed by bending the tail body 22 toward a direction close to the tray body 21, the second bending portion 222 is formed by bending the tail body 22 toward a direction away from the tray body 21, and the second bending portion 222, the first bending portion 221 and the tray body 21 are in a "Z" shape. The tail body 22 is provided with a liquid injection groove 23, and the liquid injection groove 23 is a through groove penetrating through the tail body 22.

In the present embodiment, the injection groove 23 is disposed at the center of the tail body 22, the first bending portion 221 is formed by bending the tail body 22 toward the tray body 21 along the connection between the tail body 22 and the tray body 21, and the second bending portion 222 is formed by bending the tail body 22 away from the tray body 21 along the axis L of the injection groove 23.

Preferably, the axis L is the symmetry axis of the injection tank 23.

Preferably, the disk body 21 further includes an insulating flange 25, the insulating flange 25 is disposed on the outer peripheral side of the disk body 21, one side of the insulating flange 25 close to the battery winding core 1 is provided with a clamping piece 251, and the clamping piece 251 is matched with the battery winding core 1, so that the connection effect of the current collecting disk 2 is better.

As shown in fig. 6, the insulating sealing ring 3 is disposed between the current collecting disc 2 and the casing to prevent the leakage of the electrolyte, thereby achieving a sealing function and insulating the current collecting disc 2 from the casing.

Preferably, the insulating seal ring 3 is made of plastic, rubber or the like.

As shown in fig. 6, the cover plate 4 includes a liquid injection hole 41, the liquid injection hole 41 is disposed at the central position of the cover plate 4, the liquid injection hole 41 is matched with the liquid injection groove 23 on the tail body 22 of the current collecting plate 2, the cover plate 4 is connected with the second bending part 222, when the cover plate 4 is connected with the second bending part 222, due to the existence of the liquid injection groove 23, the tail body 22 does not obstruct liquid injection, meanwhile, the connection area of the second bending part 222 and the cover plate 4 is large, the stability is better, the first bending part 221 is disposed, when the current collecting plate 2 is connected with the cover plate 4, the connection after bending is not needed, the operation is more convenient, and the service life is prolonged.

In another embodiment, as shown in fig. 7, a clamping block 24 is disposed on a side of the second bending portion 222 away from the first bending portion 221, and a clamping groove (not shown) matched with the clamping block 24 is disposed on a side of the cover plate 4 close to the current collecting plate 2, so that the second bending portion 222 and the cover plate 4 can be connected more conveniently and quickly by matching the clamping block 24 with the clamping groove, and the efficiency is high without repeated alignment during the connection process.

Preferably, the second bent portion 222 is connected to the cover plate 4 by welding.

As shown in fig. 7 and 10, the through hole 211 is provided with a protrusion 212 at its periphery, the protrusion 212 is higher than the surface of the tray body 21 near the cover plate 4, and the protrusion 212 is matched with the liquid injection hole 41, so that the liquid injection effect is better.

The safety valve assembly comprises a valve plate 5 and a cap 6, as shown in figure 1, the valve plate 5 comprises a protruding part 51 matched with the liquid injection hole 41, the cap 6 is matched with the valve plate 5 to accommodate the valve plate 5, and the valve plate 5 is prevented from being exposed to the outside and contacting with the outside air, so that a better protection effect is achieved.

Preferably, the valve sheet 5 is disposed on the liquid injection hole 41 by welding.

Preferably, the cap 6 is made of PP.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a multi-tab cylindrical battery who contains current collecting disc, includes that battery rolls core (1), current collecting disc (2), insulating sealing washer (3), apron (4), safety valve subassembly and casing, battery rolls core (1) and sets up in the casing, battery rolls core (1) and includes positive pole piece (11), diaphragm (12) and negative pole piece (13), diaphragm (12) press from both sides and establish between positive pole piece (11) and negative pole piece (13), insulating sealing washer (3) set up current collecting disc (2) with between the casing, current collecting disc (2) include disk body (21) and tail body (22), be equipped with through-hole (211) on disk body (21), current collecting disc (2) pass through disk body (21) set up the both sides tip of battery roll core (1), apron (4) pass through current collecting disc (2) with battery rolls core (1) and is connected, be equipped with on apron (4) with through-hole (211) complex annotates liquid hole (41), the relief valve subassembly sets up annotate on liquid hole (41), its characterized in that: anodal pole piece (11) are including first coating region (111) and first blank region (112), first blank region (112) surpass the upper end of diaphragm (12), negative pole piece (13) are including second coating region (131) and second blank region (132), second blank region (132) surpass the lower extreme of diaphragm (12), interval is equipped with a plurality of positive ears (113) on first blank region (112), positive pole piece (11) are convoluteed the back, a plurality of positive ears (113) are in same side of positive pole piece (11) overlaps, tail body (22) are including first bending portion (221), second bending portion (222) and annotate liquid groove (23), first bending portion (221) by tail body (22) along its with the junction of disk body (21) is towards the direction bending that is close to disk body (21) forms, second bending portion (222) by annotate tail body (22) along annotate the axle of tail liquid groove (23) towards L axle Keep away from the direction bending type of disk body (21) forms, annotate liquid groove (23) and set up to leading to the groove, annotate liquid groove (23) with annotate liquid hole (41) cooperation, apron (4) with second bending portion (222) are connected, disk body (21) are including insulating flange (25), insulating flange (25) are close to one side that battery rolled up core (1) is equipped with joint spare (251), joint spare (251) with battery rolls up core (1) cooperation.

2. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: one side that second bending portion (222) kept away from first bending portion (221) is equipped with fixture block (24), apron (4) are close to one side of current collecting plate (2) be equipped with fixture block (24) complex draw-in groove.

3. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: the periphery of the through hole (211) is provided with a convex part (212), the convex part (212) is higher than the surface of the disc body (21), and the convex part (212) is matched with the liquid injection hole (41) of the cover plate (4).

4. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: the safety valve component comprises a valve plate (5) and a cover cap (6), the valve plate (5) comprises a protruding part (51) matched with the liquid injection hole (41), the cover cap (6) is matched with the valve plate (5), and the valve plate (5) is accommodated in the cover cap.

5. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: the positive electrode lugs (113) are arranged on the first blank area (112) in a welding mode.

6. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: the axis L is a symmetry axis of the liquid injection groove (23).

7. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: the second blank area (132) is formed into a full-tab negative electrode by a square kneading mode.

8. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: a plurality of negative electrode lugs (133) are arranged on the second blank area (132) at intervals.

9. The multi-tab cylindrical battery with current collecting disk of claim 8, wherein: the negative electrode tabs (133) are arranged on the second blank area (132) in a welding mode.

10. The multi-tab cylindrical battery with current collecting disk of claim 1, wherein: the first coating region (111) and the second coating region (131) are formed by a full coating manner.