Semi-automatic winding machine and winding method for battery roll core

Abstract

The invention discloses a semi-automatic winding machine and a winding method for a battery roll core. The winding machine comprises a frame assembly, a pole piece feeding assembly and a winding pin assembly. The pole piece feeding assembly comprises two guide plates which are respectively used for placing passive and negative pole pieces. The winding pin assembly comprises a winding pin and a winding pin base. The frame assembly is provided with a synchronous conveying device for automatically conveying the passive and negative pole pieces on the guide plates to the winding pin. Due to the adoption of the technical scheme, the synchronous conveying device for automatically conveying the passive and negative pole pieces is additionally arranged, so that in the working process of the winding machine, the pole pieces which need to be wound only need to be fed into the guide plates and the passive and negative pole pieces are automatically and synchronously conveyed to the winding pin tobe wound under the mutual action of a driving roll and a guide roll, and thus, the synchronism of the passive and negative pole pieces in the conveying process is ensured, the cross infection betweenthe passive and negative pole pieces, which is generated in the operating process of an operator, can also be effectively prevented, the quality of the battery roll core is improved and the rejectionrate is reduced. Moreover, the production time can also be greatly saved and the labor intensity of the operator is also reduced.

Description

technical field [0001] The invention relates to equipment for manufacturing secondary batteries, in particular, the invention relates to a semi-automatic winding machine and winding method for battery cores. Background technique [0002] The quality of the winding core of the polymer lithium battery has a very important influence on the safety and service life of the lithium battery. The battery winding core is processed by the battery winding machine. At present, the battery core winding machine is roughly divided into four parts: loading, winding, tape sticking, and unloading. According to the degree of automation of the winding machine workflow, it can be divided into manual winding machine, semi-automatic winding machine and fully automatic winding machine. winder. Among them, the semi-automatic winding machine combines the advantages of manual winding machine and automatic winding machine, and has relatively low input cost and high production efficiency. For example, ...

AI Technical Summary

Problems solved by technology

For example, the patent No. ZL200710073568.6 discloses a semi-automatic winding machine for battery winding cores. The semi-automatic winding machines for battery winding cores are all manually completed by manual operation. The winding process is divided into three parts: pre-winding, primary winding, and secondary winding. The upper pole piece process occurs after pre-winding, and is generally completed manually by the operator. Every time a product is produced, it is necessary to manually send the pole piece into the coil. Since the operator directly touches the positive and negative electrodes, it is easy to cause cross-infection of the positive and negative electrodes, which affects the quality of the battery core, and the operator cannot guarantee the synchronization of the positive and negative electrodes in the process of transporting the positive and negative electrodes manually. Asynchronous conveying of the negative electrode sheet will lead to uneven winding and inconsistent tightness of the battery core, which will also affect the quality of the battery core, which will easily lead to an increase in the scrap rate. The labor intensity of the operator, and even the long-term continuous work will affect the quality of the battery core

The patent No. ZL200710073392.4 discloses a winding method for battery winding cores. In this method, the transportation of the pole pieces is done manually, and the synchronization of the positive and negative pole pieces being transported to the winding needle cannot be guaranteed. It will affect the quality of the battery core and easily lead to an increase in the scrap rate

[0003] Moreover, the positioning of the winding needle on the battery core semi-automatic winding machine of the prior art adopts the linear positioning type of the support and is fixed with screws. After a certain amount of wear occurs on the positioning part of the needle, the quality of the wound battery core will decrease. When the wear of the positioning part of the needle is large, the winding needle must be discarded.

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