Battery Temperature Jig Structure for Swelling-Stable Measurement
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Solution Overview
Problem
Existing secondary battery temperature measuring devices face instability and inaccuracies during high-temperature long-term storage due to detachment of the temperature measuring member from the electrode tab terrace caused by gas generation, leading to poor stability and accuracy in temperature measurement.
Innovation Solution
A secondary battery temperature measuring device with a jig that includes a hole to accommodate a temperature measuring member, using thermally conductive metal plates to clamp and fix the battery, and a heat-resistant tape to secure the member, allowing for stable and accurate temperature measurement even with volume changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature measuring member is attached to the terrace portion of the electrode tab, then the temperature can be measured during manufacturing, but the measuring member detaches due to gas generation and swelling during high-temperature long-term storage
Solution Approach 1:
The patent introduces a dedicated hole in the jig as an intermediary structure to accommodate the temperature measuring member. This hole serves as a stable mounting location that is independent of the electrode tab's structural changes, allowing the measuring member to remain securely positioned even when gas generation causes swelling during high-temperature long-term storage.
Solution Approach 2:
The patent separates the temperature measurement function from the electrode tab structure by providing a dedicated hole in the jig. This segmentation allows the measuring member to be independently positioned and secured, preventing detachment issues that occur when the measuring member is attached to the swelling terrace portion of the electrode tab.
2Ease of manufacture
If the jig structure is simplified without a hole, then manufacturing is easier, but the temperature measuring member cannot be stably accommodated
Solution Approach 1:
The hole for accommodating the temperature measuring member is formed in advance during jig manufacturing. This preliminary action ensures that the measuring member has a pre-prepared, stable mounting location that prevents detachment during subsequent high-temperature long-term storage, while adding minimal complexity to the manufacturing process.
3Reliability
If the temperature measuring member is securely fixed to prevent detachment, then measurement stability improves, but heat transfer efficiency may be reduced
Solution Approach 1:
The patent applies different qualities to different parts of the mounting structure. The hole provides a secure containment space for the measuring member, while the bottom surface of the hole maintains good thermal contact with the electrode tab. This local differentiation ensures both stable positioning and efficient heat transfer.
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
The device ensures stable and accurate temperature measurement by preventing detachment of the measuring member and facilitating direct or indirect heat transfer, reducing safety risks and enhancing convenience through adjustable hole configurations.
Implementation Method 1
the lower plate and the upper plate may include a thermally conductive metal material
Implementation Method 2
the temperature measuring member may be adhered to an inner surface of the hole by a heat-resistant tape
Data Source
AI summary
A secondary battery temperature measuring device according to the present disclosure includes a jig configured to pressurize a secondary battery, and a temperature measuring member configured to measure a temperature of the secondary battery, wherein the jig includes a hole configured to accommodate the temperature measuring member, thereby providing the secondary battery temperature measuring device capable of stable and accurate temperature measurement when evaluating high-temperature long-term storage of the secondary battery.