Rotatable Battery Cell Contact Assembly for Reliable Measurement
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Solution Overview
Problem
Existing contact devices used in characteristic measuring devices for secondary batteries often experience contact failures due to their fixed shape, leading to inefficiencies in measuring insulation resistance and other cell characteristics.
Innovation Solution
A contact device with a rotatable body, connection, and contact parts, equipped with elastic members to ensure all surfaces are in contact with the cell, minimizing contact failures and enhancing process efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed-shaped contact device is used, then the device structure is simple, but contact failure occurs when the cell is biased
Solution Approach 1:
The contact device incorporates a rotatable component that allows the contact surface to rotate and adapt to different cell positions and orientations. This dynamic adjustment capability ensures reliable contact regardless of cell bias, resolving the contradiction between contact reliability and structural simplicity by introducing controlled motion to the previously fixed structure.
Solution Approach 2:
The rotatable contact device is designed to accommodate multiple cell shapes and positions through a single unified structure. The rotation mechanism enables the same device to make proper contact with various cell configurations (rectangular, chamfered, biased positions), eliminating the need for multiple specialized contact devices and improving overall system universality.
2Adaptability or versatility
If the contact device is fixed in a rotated state, then the contact area is increased, but the device cannot adapt to different cell positions
Solution Approach 1:
The contact device uses a rotatable mechanism that allows dynamic adjustment to different cell positions while maintaining stable contact. The rotation capability enables adaptation to various cell orientations, and the design ensures that once positioned, the contact remains stable during measurement, resolving the contradiction between adaptability and contact stability.
3Productivity
If a rotatable contact device is added, then contact failure is minimized, but the device complexity increases
Solution Approach 1:
The rotatable contact device introduces a single rotation mechanism that significantly reduces contact failures and improves measurement efficiency. The added complexity is minimal (one rotational degree of freedom) compared to the substantial improvement in productivity by eliminating contact failures and enabling automated measurement of various cell types.
Data Source
AI summary
A contact device and a characteristic measuring device including the same includes: a body part in which a connection hole having a shape passing through the body part from one surface toward the other surface is defined; a connection part including a first shaft provided at one side and connected to the connection hole, and a second shaft provided to be parallel to the first shaft at the other side; and a contact part having a coupling hole, the coupling hole having a shape passing through the contact part so that the second shaft is coupled therethrough, and the other side provided with a terminal in contact with the cell. The connection part is rotatable with respect to the body part by the first shaft, and the contact part is rotatable with respect to the connection part by the second shaft.