Electrode Assembly Winding Pins for Stable Clamping and Easy Release
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Solution Overview
Problem
The yield of electrode assemblies in battery manufacturing is low due to issues with the winding process, leading to low production efficiency and increased manufacturing costs.
Innovation Solution
A winding device with independently movable inner and outer pins, driven by separate mechanisms, and an elastic returning member to facilitate clamping and releasing the electrode assembly, reducing friction and enabling easy separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the winding device uses a fixed structure for clamping the electrode assembly, then the clamping stability is improved, but the friction between the clamping mechanism and the electrode assembly increases, making separation difficult
Solution Approach 1:
The patent employs dynamic clamping mechanisms including elastic returning members that provide adaptive clamping force, and adjustable pin structures that can move independently. The elastic returning member (spring) dynamically adjusts the clamping force based on the electrode assembly's characteristics, maintaining stable clamping while reducing excessive friction that would hinder separation.
Solution Approach 2:
The winding device is divided into independent clamping components (inner pins and outer pins) that can move independently. The inner pins are driven by a first driving member while outer pins are driven by a second driving member, allowing segmented control of clamping and release actions. This segmentation enables precise control over friction forces during different stages of the winding process.
2Device complexity
If the winding device uses a simple clamping mechanism, then the device complexity is reduced, but the yield of electrode assemblies decreases due to difficulty in separation
Solution Approach 1:
The patent introduces dynamic elements including elastic returning members and independently movable pins that simplify the overall structure while improving separation capability. The elastic returning member automatically provides the necessary release force without requiring complex additional mechanisms, thereby maintaining structural simplicity while enhancing reliability through improved separation.
Solution Approach 2:
The elastic returning member serves a dual function: it assists in clamping the electrode assembly during winding and automatically facilitates release after winding is complete. This self-service mechanism eliminates the need for additional complex release mechanisms, maintaining structural simplicity while improving yield through reliable separation.
3Device complexity
If the inner pins and outer pins are driven by the same mechanism, then the device complexity is reduced, but the manufacturing precision decreases due to inability to independently control pin movements
Solution Approach 1:
The driving mechanism is segmented into two independent systems: a first driving member for inner pins and a second driving member for outer pins. This segmentation allows independent control of each pin's movement, enabling precise positioning and clamping actions tailored to the specific requirements of different pin functions, thereby maintaining manufacturing precision without excessive complexity.
Solution Approach 2:
The independent driving mechanisms enable dynamic adjustment of pin positions and movements according to real-time winding requirements. The first and second driving members can operate at different speeds and positions, providing precise control over the clamping and winding process while maintaining relatively simple device architecture through modular independent control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the yield of electrode assemblies and reduces manufacturing costs by minimizing friction and facilitating easy separation of the winding device from the electrode assembly.
Implementation Method 1
a first elastic returning member... configured to apply an elastic force in the first direction to at least one inner pin
Data Source
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AI summary
The embodiments of the present application provide a winding device, a winding apparatus and a winding method. The winding device includes: a pair of outer pins, where the pair of outer pins are oppositely arranged in a first direction, and a periphery of the pair of outer pins is used for an electrode assembly to be wound around; adjusting members, where the adjusting members are configured to be capable of reciprocating in a second direction to drive the pair of outer pins to move away from or close to each other, so as to increase or reduce a distance between the pair of outer pins, and the second direction is perpendicular to the first direction; a pair of inner pins, where the pair of inner pins are arranged between the pair of outer pins, the pair of inner pins are oppositely arranged in the first direction, and the pair of inner pins are configured to be capable of moving in a manner of being independent of the adjusting members, so as to clamp or release the electrode assembly; and a first elastic returning member, where the first elastic returning member is configured to apply an elastic force in the first direction to at least one inner pin, such that the pair of inner pins have a tendency to be close to each other. According to the technical solution of the present application, a yield of electrode assemblies can be improved, and the production efficiency can be improved.