CN207116614U - Drive the transmission mechanism of the winding head in electricity core winding machine - Google Patents

Abstract

A transmission mechanism for driving a winding head in a cell winding machine with simple structure, low cost and stable performance. There is a crank slider mechanism between the driving motor and the winding head, wherein the fixed end of the crank is fixedly connected to the winding head through the crankshaft, and the winding head winds the cell pole piece at a constant linear speed; the moving end of the crank passes through The first rotating pair is connected with one end of the connecting rod; the other end of the connecting rod is connected with the slider through the second rotating pair; the sliding block is connected with the chute provided on the slider seat through the moving pair; kinetic energy. In the manufacture of battery cells, the slider crank mechanism is applied to the winding machine that drives the winding of the pole piece of the battery cell. Not only can the winding head in the winding machine provide a constant linear speed to the pole piece, so that the gap between the layers of the battery pole piece roll is uniform and tight, but also the mechanism that drives the winding head to work is changed. The design is simple, only a linear drive mechanism is required, thereby greatly reducing the investment cost of components and software development costs.

Description

Transmission mechanism for driving the winding head in the cell winding machine

technical field

The utility model relates to a transmission mechanism, in particular to a transmission mechanism which is applied in the manufacture of square lithium batteries and provides constant linear velocity power to a winding head that winds battery core pole pieces.

Background technique

During the winding process of the cell pole piece (ie positive and negative electrode pieces) of the square lithium battery cell winding machine, the winding head is required to provide a constant winding line speed for the wound pole piece, so that , The degree of tightness of the battery pole pieces in the finished battery is uniform, which is conducive to the charging or discharging of the battery.

In the prior art, the winding head is directly driven to rotate by the drive motor, wherein the transmission ratio is set to be constant, and the angular velocity of the driving motor is controlled so that the winding head obtains a constant angular velocity. However, when the winding head rotates at a uniform angular velocity, The output of the linear velocity of the winding head to the pole piece is a sine function output. Therefore, to satisfy the constant linear velocity of the winding head, the angular velocity of the winding head must be a cosecant function. Therefore, manufacturers usually control it through software design. The driving motor performs a cosecant function so that the linear speed of the winding head is constant. But this kind of software is very difficult to develop. According to incomplete statistics, there are only two domestic companies that can develop this kind of software.

In addition, the direct drive of the drive motor still has the following disadvantages: if the motor is controlled by software to do variable speed movement, due to the limitation of the motor itself and the inertia of its load, the average maximum angular rate of the motor is limited, so that the production efficiency of the winding machine is also reduced. restricted.

Contents of the invention

The technical problem to be solved by the utility model is to provide a transmission mechanism for driving the winding head in the electric core winding machine with simple structure, low cost and stable performance.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

The transmission mechanism for driving the winding head in the electric core winding machine of the present invention includes a driving motor, and is characterized in that: a crank slider mechanism is provided between the driving motor and the winding head, wherein,

The fixed end of the crank is fixedly connected to the winding head through the crankshaft, and the winding head winds the pole piece of the cell at a constant linear speed;

The movable end of the crank is connected with one end of the connecting rod through the first rotating pair;

The other end of the connecting rod is connected with the slider through the second rotating pair;

The slider is connected with the chute set on the slider seat through the moving pair;

The slide receives its kinetic energy via a linear drive.

The linear driving device is a rack and pinion linear motion mechanism driven by a linear motor, a screw motor or a stepping motor.

The slider crank mechanism is a centering slider crank mechanism.

Compared with the prior art, the utility model applies the slider crank mechanism in the winding machine for driving the pole piece of the battery cell in the manufacture of the battery cell. It not only enables the winding head in the winding machine to provide a constant linear speed to the pole piece, so that the gap between the layers of the battery pole piece roll is uniform and tight, but also makes the mechanism that drives the winding head work It becomes simple, only a linear drive mechanism is required, thereby greatly reducing component investment costs and software development costs.

Description of drawings

Fig. 1 is a schematic diagram of a transmission mechanism of the present invention.

The reference signs are as follows:

Winding head 1, winding head bracket 2, crankshaft 3, crank 4, first rotating pair 5, connecting rod 6, second rotating pair 7, slider 8, chute 9, slider seat 10, slider seat bracket 11. Linear drive device 12.

Detailed ways

As shown in Figure 1, the transmission mechanism of the winding head 1 in the driving cell winding machine of the present invention is mainly used in the winding machine required for manufacturing the battery cell of the square lithium battery. Between the winding head 1 of the winding machine and the driving device that provides power to the winding head 1, the driving device can provide the rotation of the winding head 1 at a constant linear speed through the transmission mechanism, thus, in the winding When winding the electrode pole piece (not shown in the figure) of the electric core around the head 1, the gap and degree of tightness between adjacent pole pieces are uniform, so as to obtain a high-quality electric core.

The transmission mechanism is a crank-slider mechanism, preferably a centering crank-slider mechanism. It consists of a winding head 1, a winding head bracket 2, a crankshaft 3, a crank 4, a connecting rod 6, a slider 8, a slider seat 10, a slider seat bracket 11 and a chute 9 arranged on the slider seat 10 . in:

The fixed end of the crank 4 is fixedly connected to the winding head 1 through the crankshaft 3, and the winding head 1 winds the cell pole piece at a constant linear speed; the moving end of the crank 4 is connected to one end of the connecting rod 6 through the first rotating pair 5; The other end of the connecting rod 6 is connected with the slider 8 through the second rotating pair 7; the slider 8 is connected with the chute 9 provided on the slider seat 10 through the moving pair; the slider 8 obtains kinetic energy through the linear drive device 12; Winding head support 2 and slide block support 11 are fixed on the frame of winding machine.

The linear drive device 12 may be a rack and pinion linear motion mechanism driven by a linear motor, a screw motor or a stepping motor.

In the utility model, by changing the transmission relationship between the linear driving device 12 and the winding head 1, the driving device is made to perform linear reciprocating motion, so that the winding speed of the winding head 1 to the pole pieces is constant.

The utility model also has the following advantages:

1) Reduce the action control cost of winding head 1;

2) It overcomes the efficiency limitation of traditional motion control and can improve the winding efficiency;

3) The winding control system is easy to maintain and the maintenance cost is reduced.

Claims (3)

1. A transmission mechanism for driving the winding head in the electric core winding machine, comprising a driving motor, characterized in that: a slider crank mechanism is provided between the driving motor and the winding head (1), wherein, The fixed end of the crank (4) is fixedly connected to the winding head (1) through the crankshaft (3), and the winding head (1) winds the cell pole pieces at a constant linear speed; The movable end of the crank (4) is connected with one end of the connecting rod (6) through the first rotating pair (5); The other end of the connecting rod (6) is connected with the slider (8) through the second rotary pair (7); The slider (8) is connected with the chute (9) arranged on the slider seat (10) through a moving pair; The slider (8) obtains kinetic energy through a linear drive (12). 2. The transmission mechanism for driving the winding head in the cell winding machine according to claim 1, characterized in that: the linear drive device (12) is a gear driven by a linear motor, a screw motor or a stepping motor Rack linear motion mechanism. 3 . The transmission mechanism for driving the winding head in the cell winding machine according to claim 2 , wherein the slider crank mechanism is a centering slider crank mechanism. 4 .