Tension-force synchronous controller of coiler for square double-needle power lithium ion battery

Abstract

A tension-force synchronous controller of a coiler for a square double-needle power lithium ion battery comprises an MCU arranged at the center position, and a memory, a jump wire port, a digital quantity input terminal and an encoder input terminal which are all arranged at the left side of MCU, and a communication indicating lamp, an ISP download port, a digital quantity output terminal and a COM communication port which are all arranged at the right side of MCU, and a power supply module, a crystal oscillation circuit and a reset circuit which are successively arranged before MCU, and a two-way rolling motor controller and a two-way unreeling motor controller which are arranged at the rear of MCU; and the digital quantity input terminal, the encoder input terminal, the digital quantity output terminal, the COM communication port, the two-way rolling motor controller and the two-way unreeling motor controller are connected with MCU respectively via optical couplers. By analyzing the movement characteristics in the reeling process of a reeling needle, an optimum movement track calculating formula of the reeling process of the reeling needle is obtained, controlling on a reeling-needle reeling motor employs a manner of DMA (Direct Memory Access) plus PWM (Pulse Width Modulation), the diameter of a unreeled membrane coil can be identified online, an unreeling motor employs an algorithm of feedforward plus adaptive feedback control and is capable of independently finishing synchronous tension-force control on the battery in the coiling process.

Description

technical field [0001] The invention relates to a tension synchronous controller of a powered lithium-ion square double-needle battery winding machine. Background technique [0002] The tension synchronous control of the existing power lithium-ion battery winding machine mainly uses a small PLC as the controller. Due to the essential characteristics determined by the working mode of the PLC, the real-time performance of its control is low, and there are certain limitations on complex calculations and processing. When the needle winding runs according to the optimal speed curve, it can only be fitted by multi-stage approximation, but cannot reach the optimal trajectory. It is also difficult to implement a complex and effective control algorithm for unwinding motion control, which limits the improvement of battery winding quality to a large extent. Furthermore, PLC cannot be customized, which will inevitably increase the cost of equipment. Therefore, in view of the shortcomin...

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Problems solved by technology

[0002] The tension synchronous control of the existing power lithium-ion battery winding machine mainly uses a small PLC as the controller. Due to the essential characteristics determined by the working mode of the PLC, the real-time performance of its control is low, and there are certain limitations on complex calculations and processing. When the needle winding runs according to the optimal speed curve, it can only be approximated by multiple segments, but cannot reach the optimal trajectory

It is also difficult to implement a complex and effective control algorithm for unwinding motion control, which limits the improvement of battery winding quality to a large extent

Furthermore, PLC cannot be customized, which will inevitably increase the cost of equipment. Therefore, in view of the deficiencies of the existing technology, a controller is developed that can independently complete the synchronous tension control in the battery winding process. The motion characteristic analysis of the winding process obtains the calculation formula for the optimal motion trajectory of the needle winding process, the diameter of the unwinding film roll can be identified online, the unwinding motor adopts a feed-forward plus adaptive feedback control algorithm, and the needle winding motor control The DMA plus PWM method can effectively improve the battery winding quality and reduce the equipment cost. The tension synchronization controller of the power lithium-ion square double-needle battery winding machine has become an urgent problem to be solved in the development of the power lithium-ion battery winding machine.

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