CN217588988U

CN217588988U - Novel positive electrode nickel mesh current collector of lithium-ion battery

Info

Publication number: CN217588988U
Application number: CN202221037840.1U
Authority: CN
Inventors: 何洪峰
Original assignee: Guangdong Jindawan New Material Co ltd
Current assignee: Guangdong Jindawan New Material Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-10-14
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses a novel positive nickel screen current collector of a lithium-ion battery, which comprises a nickel screen body, wherein one side of the nickel screen body is inwards bent to form a first folded edge, and the other side of the nickel screen body is inwards bent to form a second folded edge; the width of the first folded edge is 1-3mm, and the width of the second folded edge is larger than that of the first folded edge; the two sides of the nickel net are inwards bent to form a first folding edge and a second folding edge, the width of the second folding edge is larger than that of the first folding edge, the stress of the positive nickel net can be improved, the stability of the positive nickel net in the pole piece winding process is improved, and therefore the purposes that the existing positive nickel net cannot be bent towards the same direction, burrs are easily generated, a diaphragm is penetrated, a short circuit is formed, and the potential safety hazard is increased are achieved.

Description

Novel positive nickel net current collector of lithium secondary battery

Technical Field

The utility model relates to a anodal nickel net technical field, concretely relates to novel anodal nickel net mass flow body of inferior battery of lithium.

Background

The lithium battery is a kind of battery which uses lithium metal or lithium alloy as negative electrode material and uses non-aqueous electrolyte solution, the electrode current collecting net is an important component of the electrode, it has very important influence on the battery performance, the net is often used as the light skeleton of the battery, the larger the current conducting area of the current collecting net is, the more reasonable the mesh size is, the better the discharging effect is; the nickel mesh net is cutting the in-process and inevitably can produce some burrs, and the edge of nickel net is originally sharp very, in the manufacture process of battery, will cause the burr to pierce through the diaphragm like this, makes positive negative pole link to each other, causes the problem of battery short circuit, and in order to solve this problem, the anodal nickel net of prior art is all through inwards bending the both sides of nickel net for the nickel net edge part is no longer sharp.

The edge-folded nickel screen disclosed in Chinese patent [ CN201320768532.0] comprises a nickel screen, wherein the nickel screen is in a strip shape, 2 long edges of the nickel screen are respectively bent inwards along the short edge direction of the nickel screen to form an edge fold, and the width of the edge fold is 1.5-2.5mm; this patent originally can avoid the probability that the anodal burr of power type lithium subcell produced in manufacturing process, thereby reduces because the burr pierces through the diaphragm and causes the possibility of positive negative pole direct contact short circuit, has improved the security performance of power type lithium subcell greatly.

As also disclosed in chinese patent No. (CN 201821103728.7), the metal extended nickel mesh for battery with folded edges comprises a metal extended nickel mesh body assembly and a folded edge assembly, and the longitudinal and transverse corners of the metal extended nickel mesh are bent inward, so that the edge portion of the nickel mesh is no longer sharp, the probability of burr generation in the manufacturing process of the metal extended nickel mesh is reduced, the possibility of short circuit caused by direct contact of the positive electrode and the negative electrode due to the piercing of the diaphragm by the burr is further reduced, powdering is easy to occur in the production process of the power type lithium-voltage battery, the phenomenon of powder leakage is avoided, automatic production can be realized, the use efficiency and production efficiency of the metal extended nickel mesh are improved, the battery made by the metal extended nickel mesh is suitable for large-current discharge, and the safety performance of the power type lithium-sub-battery is greatly improved.

However, the two folded edges of the metal nickel mesh in the prior art are symmetrically arranged, namely the widths of the two folded edges are consistent, so that the folded edges are too small in width and poor in stress stability, the nickel mesh cannot be bent towards the same direction after being deformed, burrs are easily generated, the diaphragm is penetrated, a short circuit is formed, and potential safety hazards are increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a through improving the hem of anodal nickel net, improve the atress of anodal nickel net, increase the stability at pole piece coiling in-process to reach and solve current product and can not buckle towards same direction, very easily produce the burr, prick the diaphragm, form the short circuit, increase the novel anodal nickel net mass flow body of lithium subcell of potential safety hazard.

In order to solve the technical problem, the technical scheme of the utility model is that: a novel positive electrode nickel mesh current collector of a lithium secondary battery comprises a nickel mesh body, wherein one side of the nickel mesh body is inwards bent to form a first folded edge, and the other side of the nickel mesh body is inwards bent to form a second folded edge; the width of the first folded edge is 1-3mm, and the width of the second folded edge is larger than that of the first folded edge.

Preferably, the width of the second flap is greater than twice the width of the first flap.

Furthermore, the width of the first folded edge is 2mm, and the width of the second folded edge is 6mm.

Preferably, the nickel net body comprises a nickel net body base material and nickel net ribs, and the nickel net body base material and the nickel net ribs are interwoven to form nickel net holes.

Preferably, the nickel screen meshes are diamond-shaped nickel screen meshes.

The utility model discloses technical effect mainly embodies: the two sides of the nickel net are inwards bent to form a first folding edge and a second folding edge, the width of the second folding edge is larger than that of the first folding edge, the stress of the positive nickel net can be improved, the stability of the positive nickel net in the pole piece winding process is improved, and the purposes that the existing positive nickel net cannot be bent towards the same direction, burrs are easily generated, a diaphragm is penetrated through, a short circuit is formed, and the potential safety hazard is increased are achieved.

Drawings

Fig. 1 is a schematic structural diagram of a novel positive nickel mesh current collector of a lithium secondary battery of the present invention;

fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

In the present embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left", "above", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a pin connecting manner, or the like, which is commonly used in the prior art, and therefore, details thereof are not described in the present embodiment.

A novel positive electrode nickel mesh current collector of a lithium secondary battery is shown in figures 1-2 and comprises a nickel mesh body 1, wherein one side of the nickel mesh body 1 is inwards bent to form a first folded edge 2, and the other side of the nickel mesh body 1 is inwards bent to form a second folded edge 3; the width of the second flange 3 is greater than twice the width of the first flange 2. In the figure, the reference mark a is the width of the first folded edge 2, in the figure, the reference mark b is the width of the second folded edge, and b is more than 2a. The nickel screen body 1 comprises a nickel screen body base material 11 and nickel screen ribs 12, wherein the nickel screen body base material 11 and the nickel screen ribs 12 are interwoven to form nickel screen meshes 13.

In this embodiment, the width of the first folded edge 2 is 2mm, and the width of the second folded edge 3 is 6mm.

In this embodiment, the nickel mesh substrate 11 is made of nickel alloy, and the material of the nickel mesh ribs 12 is the same as that of the nickel mesh substrate 11.

In this embodiment, the nickel mesh 13 is a diamond-shaped nickel mesh.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. The utility model provides a novel anodal nickel net mass flow body of inferior battery of lithium, includes the nickel net dictyosome, its characterized in that: one side of the nickel screen body is inwards bent to form a first folded edge, and the other side of the nickel screen body is inwards bent to form a second folded edge; the width of the first folded edge is 1-3mm, and the width of the second folded edge is larger than that of the first folded edge.

2. The novel positive electrode nickel mesh current collector for a lithium secondary battery as claimed in claim 1, wherein: the width of the second folded edge is greater than twice the width of the first folded edge.

3. The novel positive nickel mesh current collector for lithium subcells as claimed in claim 2, wherein: the width of the first folded edge is 2mm, and the width of the second folded edge is 6mm.

4. The novel positive nickel mesh current collector for lithium subcells as claimed in claim 1, wherein: the nickel screen body comprises a nickel screen body base material and nickel screen ribs, and the nickel screen body base material and the nickel screen ribs are interwoven to form nickel screen meshes.

5. The novel positive electrode nickel mesh current collector for a lithium secondary battery as claimed in claim 4, wherein: the nickel screen meshes are diamond-shaped nickel screen meshes.