Pouch Cell Shock Test Jig for Shape Retention and Temperature Sensing
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Solution Overview
Problem
Conventional shock test apparatuses for pouch-shaped battery cells fail to maintain the original shape of the battery cell during testing, leading to potential deformation and reduced reliability and accuracy in test results, and lack mechanisms for precise temperature measurement without damaging temperature sensing devices.
Innovation Solution
A shock test apparatus with a jig comprising first and second jig members featuring incision and through-hole portions, along with a pressing member, is used to deform only the pressed part of the battery cell while maintaining its shape, and includes a through-hole for temperature sensing without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional shock test apparatus is used to fix a pouch-shaped battery cell, then the battery cell can be secured for testing, but the battery cell may be bent or folded leading to deformation
Solution Approach 1:
The jig is divided into multiple members (first jig member and second jig member) that can be separately positioned and fastened. This segmentation allows each member to independently support specific portions of the battery cell, distributing the fixing forces and preventing concentrated stress that would cause deformation.
Solution Approach 2:
The jig members are designed with specific local features including incision portions and through-hole portions at predetermined locations. These local structural qualities enable targeted support at critical areas of the battery cell while maintaining overall shape integrity during the shock test.
2Measurement precision
If temperature measurement devices are placed close to the battery cell for accurate measurement, then temperature data can be captured, but the devices may be damaged during shock testing
Solution Approach 1:
The jig members serve as intermediary structures between the temperature measurement devices and the battery cell. The through-hole portions in the jig members allow temperature sensors to be positioned close to the battery cell for accurate measurement while the jig structure itself protects the sensors from direct impact and damage during shock testing.
3Ease of manufacture
If the jig structure is made simple for ease of manufacture, then manufacturing cost is reduced, but the ability to maintain battery cell shape and enable temperature measurement is compromised
Solution Approach 1:
The jig is constructed from multiple simple jig members that can be manufactured using standard fabrication processes. Each member is relatively simple in structure, but when assembled together with fastening members, they create a complex functional system that maintains battery cell shape and accommodates temperature sensors.
Solution Approach 2:
The jig members are designed to perform multiple functions simultaneously: providing structural support to maintain battery cell shape, creating through-holes for temperature sensor placement, and serving as mounting structures for fastening. This multi-functionality reduces the need for additional specialized components.
Data Source
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AI summary
The present invention relates to a shock test apparatus for pouch-shaped battery cells and a shock test method for pouch-shaped battery cells using the same, and more particularly to a shock test apparatus for pouch-shaped battery cells, the shock test apparatus including a flat bottom plate, a jig including a first jig member and a second jig member configured to be located respectively at opposite surfaces of a pouch-shaped battery cell, each of the first jig member and the second jig member having a quadrangular shape, and a pressing member configured to press a predetermined part of the pouch-shaped battery cell, and a shock test method for pouch-shaped battery cells using the same.