Detachable Battery Case for Accurate Internal Short-Circuit Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for conducting internal short-circuit tests on lithium-ion secondary batteries, particularly those with rigid cases, face challenges such as inaccurate testing due to differences in heat dissipation and liquid ratios, and the difficulty in introducing test metal pieces without damaging the power generating element or causing displacement, leading to safety concerns and unreliable results.
Innovation Solution
A test battery case with a detachable closing member and a sealing member that allows for controlled opening during the internal short-circuit test, using a test metal piece between electrodes to induce a short-circuit, while an elastic member and clearance adjustment member ensure accurate positioning and prevent damage, allowing for safe and precise testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a battery has a case made of rigid material, then the battery has large electric capacity, but it is difficult to disassemble the battery to conduct internal short-circuit test
Solution Approach 1:
The battery case is divided into a container and a closing member that can be detachably removed. This segmentation allows the battery to maintain its rigid structure and large electric capacity while enabling easy access to the power generating element for internal short-circuit testing by simply removing the closing member.
2Reliability
If a test metal piece is preliminarily inserted during fabrication, then the test can be conducted after charging, but the test metal piece may be displaced or damage the power generating element
Solution Approach 1:
The test metal piece is preliminarily inserted into the power generating element during fabrication, but the closing member is designed to be detachably removed after charging. This allows the test metal piece to be in place during charging (ensuring test reliability) while enabling access to the power generating element after charging for accurate positioning and testing without displacement or damage.
Solution Approach 2:
The closing member transitions from a fixed state during fabrication and charging to a removable state after charging. This dynamic design allows the system to maintain the test metal piece in position during charging while enabling access after charging for precise positioning and testing, resolving the conflict between test reliability and manufacturing precision.
3Ease of operation
If the power generating element is taken out to introduce test metal piece, then the test can be conducted, but internal short-circuit may occur during operations
Solution Approach 1:
The test metal piece is preliminarily inserted into the power generating element during fabrication when the battery is in a safe state (not charged). The closing member is then detachably secured to close the opening. This allows the test metal piece to be introduced safely before charging, eliminating the risk of internal short-circuit during operations, while still enabling the test to be conducted after charging by simply removing the closing member.
Data Source
Figure 1~3
Figure 4
Figure 5
AI summary
The present invention provides a test battery case which is capable of conducting an internal short-circuit test with accuracy. The test battery case according to the present invention includes a container for housing a power generating element, and a closing member detachably secured to the container, wherein the container has an opening for the internal short-circuit test, the opening being closed by the closing member.