Battery Module Thermistor Retention Pocket for Accurate Cell Profiling
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Solution Overview
Problem
Existing electric vehicle battery systems lack effective mechanisms for positioning, orienting, and retaining thermistors relative to battery cells to accurately measure temperature profiles, which is crucial for efficient operation and safety.
Innovation Solution
A thermistor retention pocket is integrated into the battery module, comprising a first wall and a second wall with an aperture and recess, to securely position and orient the thermistor, ensuring accurate temperature measurement and retention during installation and vehicle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no retention mechanism is provided for the thermistor, then the battery module structure remains simple, but the thermistor cannot be reliably positioned or retained during installation and vehicle movement
Solution Approach 1:
The retention pocket is integrated directly into the battery module structure, merging the retention function with the existing module walls. The first and second walls form the retention pocket as part of the module assembly, eliminating the need for separate retention components while providing reliable thermistor positioning during installation and vehicle movement.
Solution Approach 2:
The retention pocket acts as an intermediary structure between the thermistor and the battery module. It provides a dedicated space with retention features (aperture and recess) that securely holds the thermistor in the correct position without requiring complex external retention mechanisms.
2Measurement precision
If the thermistor is not properly oriented relative to the battery cell, then the battery module assembly is simpler, but accurate temperature measurement cannot be achieved
Solution Approach 1:
The retention pocket provides localized structural features (aperture in the second wall, recess) that specifically address the orientation requirement. These localized features guide and secure the thermistor in the precise orientation needed for accurate temperature measurement, while the rest of the battery module maintains its simple structure.
3Ease of manufacture
If the thermistor retention structure is integrated with the battery module, then manufacturing uniformity is improved, but the aperture and recess features increase manufacturing steps
Solution Approach 1:
The retention pocket features (walls, aperture, recess) are integrated into the battery module as part of the same structural assembly. This merging approach ensures uniform manufacturing processes and quality control across the entire module, while the aperture and recess are formed as integral features rather than separate components requiring additional assembly steps.
Data Source
AI summary
An apparatus can include a first wall and a second wall, the second wall having an aperture. The apparatus can include an opening defined by the first wall and the second wall, the opening configured to receive a thermistor. The aperture can be configured to receive a retention member of the thermistor to dispose the thermistor in a battery module.