Cylindrical battery cell film-making and winding machine

Abstract

The invention provides a cylindrical battery cell film-making and winding machine, comprising a rack, and a winding head device, a pole piece inserting and cutting device, a diaphragm cut-off device and a gluing device which are connected with the rack, wherein the winding head device comprises a winding unit provided with a winding head, a first driving unit and a swing arm group unit; the winding head comprises a first station, a second station and a third station which are respectively provided with winding needles; each winding needle is provided with a first needle body and a second needle body; the first driving unit comprises a roller shaft as well as a first cam, a second cam and a third cam which are installed on the roller shaft; the swing arm group unit comprises a first swing arm group, a second swing arm group and a third swing arm group; the first cam drives the first swing arm group to control the first needle body of the first station to move along the axial direction of the winding head, the second cam drives the second swing arm group to control the first needle body of the third station to move along the axial direction of the winding head, and the third cam drives the third swing arm group to control the second needle body of the third station to move along the axial direction of the winding head. The cylindrical battery cell film-making and winding machinehas the advantages of being reliable in work, high in processing accuracy and rapid in production efficiency.

Description

technical field [0001] The invention relates to the technical field of battery production, in particular to a cylindrical battery sheet making and winding machine. Background technique [0002] The existing battery winding equipment is mainly used to install the positive electrode sheet, negative electrode sheet and separator in a certain order and then wind them into the battery cell, and to glue the rolled battery cell, short-circuit detection, etc. , which has the advantages of high production efficiency, low production cost and low rework rate of cell production. [0003] The conventional battery winding equipment is to roll the battery core through the winding head device, which mainly uses the winding head and the winding needle on it to cooperate with multiple independent cylinders to realize the rolling of the battery core and the battery after the glue is pasted. Core blanking and other operations, that is, through multiple independent cylinders to drive the windin...

AI Technical Summary

Problems solved by technology

However, the disadvantages of electric control such as cylinder drive are: the cylinder needs to cooperate with electrical components and electric control signals to operate, which makes the response of the cylinder slow and the response time is long, which is not conducive to improving the production efficiency of the rolling equipment.

However, the existing gluing equipment has the disadvantage of low production efficiency, because the gluing process is to first stick the first end of the tape on the outer circumferential surface of the rolled battery cell, and then drive the tape through the rotation of the rolling needle. Wrapped on the outer circumferential surface of the battery core, after the tape is wound to an appropriate length, the tape is cut and finished, so that the tape can only be cut after the glue is applied, which affects the overall time of glue application

Moreover, when the existing adhesive tape is wound, it is easy to exert additional pressure on the battery core, so that the inside of the battery core is easily compacted too tightly, which affects the quality of the battery core

[0005] Secondly, the existing battery short-circuit testing device has a short detection time per unit time for the short-circuit detection of the battery, generally only 0.5 seconds to 1 second. However, in the short-circuit test link, time is the most important test index, making Existing short-circuit test devices have problems such as poor detection accuracy and short detection time

[0006] Again, when the pole piece insertion and cutting device of the existing cell rolling equipment cuts the pole piece, it is necessary to suspend the winding of the pole piece first, so as to ensure that the pole piece cutting mechanism of the pole piece insertion cutting mechanism can Cutting off the pole piece will lead to a brief termination of the battery automatic rolling equipment during the battery rolling process, which has the disadvantage of low production efficiency, and when the pole piece is cut off, it may also be necessary Due to the response time, the winding and cutting operations of the pole pieces interfere with each other

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