CN218919224U

CN218919224U - Pole piece and battery capable of improving electrolyte permeation speed

Info

Publication number: CN218919224U
Application number: CN202222074381.0U
Authority: CN
Inventors: 何伟; 冯树南; 王举; 郭春泰; 杨益志
Original assignee: Lanjing New Energy Jiaxing Co ltd
Current assignee: Lanjing New Energy Jiaxing Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2023-04-25
Anticipated expiration: 2032-08-08

Abstract

The utility model provides a pole piece and a battery for improving the permeation speed of electrolyte, which comprise a pole lug and an active material area which are integrally structured, wherein a plurality of through holes are formed in the pole lug, and the through holes are stacked in a staggered manner after the pole lug is bent. According to the pole piece and the battery for improving the electrolyte permeation speed, disclosed by the utility model, the electrolyte permeation channel is formed in the stacking direction of the pole lugs, so that the electrolyte injection efficiency and the electrolyte infiltration are improved conveniently.

Description

Pole piece and battery capable of improving electrolyte permeation speed

Technical Field

The utility model belongs to the technical field of new energy batteries, and particularly relates to a pole piece and a battery for improving the permeation speed of electrolyte.

Background

The traditional cylindrical battery is provided with the electrode lugs welded on the electrode plates, has insufficient conductive capacity and cannot support the charge and discharge of large current and fast heat transfer. The large cylindrical battery adopts a full tab design or a cut-and-stacked tab design to improve the conductivity, but the full tab or the cut-and-stacked tab brings the problem that the electrolyte is difficult to fill, and the production and the manufacture are time-consuming.

Disclosure of Invention

In view of the above, the utility model aims to provide a pole piece for improving the permeation speed of electrolyte so as to solve the problems of high electrolyte injection difficulty and low electrolyte injection efficiency of the existing pole piece structure.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the pole piece comprises a pole lug and an active material area which are integrally structured, wherein a plurality of through holes are formed in the pole lug, and a plurality of through holes are stacked in a staggered manner after the pole lug is bent.

Further, the inner diameter of the through hole is not more than 0.5mm.

Further, the shape of the tab is rectangular or diamond.

Compared with the prior art, the pole piece for improving the electrolyte permeation speed has the following advantages:

(1) According to the pole piece for improving the electrolyte permeation speed, the electrolyte permeation channel is formed in the stacking direction of the pole lugs, so that the electrolyte injection efficiency and the electrolyte infiltration are improved conveniently.

(2) The pole piece for improving the permeation speed of the electrolyte reduces the difficulty of liquid injection and saves the time of liquid injection.

The utility model further aims to provide a battery, which aims to solve the problems of high difficulty and low liquid injection efficiency of the conventional cylindrical battery electrolyte injection.

a battery comprises a pole piece, wherein after the pole piece is wound into a winding core, a pole lug is in a leveling state.

Further, either the positive electrode or the negative electrode of the winding core is in an extremely flat state.

Further, the positive electrode and the negative electrode of the winding core are in a flattening state.

The battery has the same advantages as the pole piece for improving the electrolyte permeation speed compared with the prior art, and the details are not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram I of a pole piece for improving the permeation rate of an electrolyte according to an embodiment of the utility model;

fig. 2 is an enlarged view of a portion a in fig. 1;

FIG. 3 is a second schematic illustration of a pole piece for increasing the permeation rate of an electrolyte according to an embodiment of the present utility model;

fig. 4 is an enlarged view of a portion B in fig. 3;

fig. 5 is a schematic view of a battery according to an embodiment of the present utility model.

Reference numerals illustrate:

1-electrode lugs; 11-through holes; 2-active material region.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The pole piece for improving the electrolyte permeation speed comprises a pole lug 1 and an active material area 2 which are integrally structured, wherein a plurality of through holes 11 are formed in the pole lug 1, and a plurality of through holes 11 are stacked in a staggered manner after the pole lug 1 is bent, as shown in fig. 1 to 4.

The inner diameter of the through hole 11 is in the range of not more than 0.5mm.

The shape of the tab 1 is rectangular or oblong or diamond.

The manufacturing method of the pole piece for improving the permeation speed of the electrolyte comprises the following steps:

the pole piece comprises a collector and an active material region 2, the width of the collector exceeds the active material region 2, the part exceeding the active material region 2 is used as a conductive tab 1, the tab 1 is cut into a required shape by laser, and in the laser cutting process, a through hole 11 is formed on the tab by punching by laser synchronously. After all the lugs 1 are bent, the through holes 11 are stacked in a staggered manner, and an electrolyte permeation channel is formed in the stacking direction of the lugs 1, so that the liquid injection efficiency and the electrolyte infiltration are improved.

As shown in fig. 5, a battery is wound into a winding core from the pole piece, and then the tab 1 is flattened. The positive and negative pole pieces of the winding core can adopt the treatment mode for one pole or both poles. Therefore, the winding core and the battery assembled by the pole pieces are beneficial to electrolyte permeation and improve the liquid injection efficiency.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides an improve pole piece of electrolyte permeation rate which characterized in that: the electrode tab comprises an integrated structure of electrode tabs and an active material area, wherein a plurality of through holes are formed in the electrode tabs, and a plurality of through holes are stacked in a staggered mode after the electrode tabs are bent.

2. A pole piece for increasing the permeation rate of an electrolyte according to claim 1, wherein: the inner diameter of the through hole is not more than 0.5mm.

3. A pole piece for increasing the permeation rate of an electrolyte according to claim 1, wherein: the shape of the tab is rectangular or oblong or diamond.

4. A battery using a pole piece of any one of claims 1 to 3 for increasing the rate of penetration of an electrolyte, characterized in that: after the pole piece is wound into a winding core, the pole lug is in a patting state.

5. A battery of pole pieces for increasing the rate of electrolyte permeation according to claim 4, wherein: and any one of the positive electrode and the negative electrode of the winding core is in a very flat state.

6. A battery of pole pieces for increasing the rate of electrolyte permeation according to claim 4, wherein: the positive electrode and the negative electrode of the winding core are in a flattening state.