Secondary Cell Press Inspection With Temperature-Corrected Current
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Solution Overview
Problem
Existing methods for detecting contaminants in secondary cells, such as lithium-ion batteries, are time-consuming and do not account for temperature variations, leading to inefficiencies and potential safety risks due to internal short circuits.
Innovation Solution
An inspection apparatus and method that uses a movable element with pressing elements and temperature sensors to apply pressure, measure current and temperature, and correct for temperature-dependent current variations, enabling accurate detection of contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If long aging steps are used to detect defects in secondary cells, then detection accuracy is improved, but inspection time increases significantly
Solution Approach 1:
The patent applies preliminary action by performing the inspection operation immediately after cell assembly, before the cell undergoes its full aging process. The inspection apparatus detects contaminants and defects in the early stage when the cell is still in a controlled state, eliminating the need to wait for long aging periods while maintaining detection accuracy through the specialized pressing and measurement mechanisms.
2Device complexity
If temperature variations are not accounted for in current measurements, then measurement simplicity is maintained, but measurement precision deteriorates
Solution Approach 1:
The patent implements feedback by incorporating temperature sensors that continuously monitor the cell temperature during inspection. The system uses this temperature information to correct the current measurements, automatically adjusting for temperature-dependent variations in electrical properties. This feedback mechanism maintains measurement precision without significantly increasing system complexity.
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
Facilitates rapid and precise identification of contaminants within secondary cells, improving safety by reducing false positives and negatives in defect detection.
Implementation Method 1
each pressing element that is in contact with the at least one secondary cell comprises a temperature sensor, the temperature sensor being intended to measure the temperature of the at least one secondary cell
Data Source
AI summary
An inspection apparatus for inspecting at least one secondary cell includes a fixed support part; a movable part; and pressing parts that are installed between the support part and the movable part. The pressing parts are freely movable along the main axis, two adjacent pressing parts defining a space (120) for accommodating a secondary cell. Each pressing part that is in contact with the at least one secondary cell has a temperature sensor, the temperature sensor being intended to measure the temperature of the at least one secondary cell which is subjected to a pressure between the pressing parts. An inspection method for inspecting at least one secondary cell is related to the inspection apparatus.