Battery Conductive Module Layout for Thermistor Interference Avoidance
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Solution Overview
Problem
Conductive modules in vehicle battery systems face interference issues with other components around thermistors, leading to reduced durability and quality, as existing designs do not effectively prevent such interference.
Innovation Solution
A conductive module design featuring a flexible printed circuit substrate with a bifurcated body for thermistor temperature detection, incorporating heat transfer members and a pressing mechanism to ensure direct heat transfer while guiding the coupling part to prevent interference with other components, utilizing a housing with cutout paths to avoid external components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conductive component is disposed close to the battery cell side together with the thermistor, then the temperature detection accuracy is improved, but the conductive component interferes with other components around the thermistor, reducing durability and quality
Solution Approach 1:
The patent introduces a path guiding part (cutout part) in the housing that provides a dedicated three-dimensional routing path for the coupling part. This spatial guidance in the Z-direction (thickness direction) and planar direction prevents the coupling part from interfering with other components while maintaining the thermistor's close proximity to the battery cell for accurate temperature detection.
Solution Approach 2:
The path guiding part acts as an intermediary structure between the coupling part and other components. By providing a designated routing path, it mediates the spatial relationship, allowing the coupling part to connect the thermistor to the conductive component without coming into contact with or interfering with other components around the thermistor.
2Ease of manufacture
If the coupling part is routed freely without guidance, then the assembly process is simpler, but the coupling part interferes with other components, causing durability decrease
Solution Approach 1:
The path guiding part is pre-formed as an integrated feature of the housing structure. This preliminary preparation of the routing path eliminates the need for complex assembly adjustments or additional components to prevent interference, thereby maintaining assembly simplicity while ensuring durability through predetermined spatial separation.
3Device complexity
If the thermistor is placed on the electrical connection part without direct heat transfer path, then the device complexity is reduced, but the temperature measurement accuracy deteriorates
Solution Approach 1:
The electrical connection part is segmented into distinct functional regions: a placement surface for mounting the thermistor and an outer wall surface for heat transfer. This segmentation allows the thermistor to be positioned on the placement surface while maintaining a direct thermal pathway through the electrical connection part to the battery cell, achieving both structural simplicity and measurement accuracy.
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 design enhances the durability and quality of the conductive module by preventing interference, ensuring accurate temperature measurement and maintaining high conduction performance, thus extending the lifespan of battery cells and simplifying assembly.
Implementation Method 1
allows heat of an outer wall surface of the battery cell to be directly or indirectly transferred from a surface on a side opposite to a placement surface on which the thermistor is placed to the electrical connection part
Implementation Method 2
a heat transfer member that is provided on the placement surface side of the electrical connection part and transfers heat of the electrical connection part to the thermistor
Data Source
AI summary
A conductive module includes: a conductive component as a flat flexible printed circuit substrate that electrically connects electric conductors to a plurality of battery cells; a thermistor that is placed on as electrical connection part of a bifurcating body of the conductive component and detects the temperature of a battery cell as a temperature detection target; and a housing that houses or/and holds the conductive component. The bifurcated body includes a coupling part that couples the electrical connection part to a main body. The electrical connection part is a part to which heat of an outer wall surface of the battery cell is directly or indirectly transferred from a surface on a side opposite to a placement surface on which the thermistor is placed.