Battery Module Thermistor Housing for Accurate Cell Temperature Sensing
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Solution Overview
Problem
Conventional battery modules face challenges in accurately measuring temperature near battery cells due to the risk of wire damage and insulation issues from external forces, particularly when using wire bonding methods for connecting thermistors.
Innovation Solution
A battery module design featuring a module housing with grooves for thermistor placement, an interconnection board for voltage sensing, and a bus bar assembly with injection tubes and glue for secure electrical connections, minimizing the risk of wire damage and enhancing temperature measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wire bonding method is used to connect thermistor and battery cell, then temperature measurement capability is improved, but wire strength is low and easily damaged by external force
Solution Approach 1:
The patent introduces a support structure as an intermediary component between the thermistor and battery cell. This support structure carries the thermistor and provides mechanical protection to the wire, preventing direct exposure to external forces while maintaining temperature measurement functionality near the battery cell.
2Measurement precision
If thermistor is placed near battery cell with maximum temperature, then temperature measurement accuracy is improved, but risk of wire damage and insulation issues increases
Solution Approach 1:
The support structure serves as a mediator that enables the thermistor to be positioned near the battery cell for accurate temperature measurement while simultaneously protecting the wire from external forces and insulation issues through its protective enclosure.
Solution Approach 2:
The support structure provides beforehand protection to the wire and thermistor assembly, cushioning against potential external forces and insulation issues before they can cause damage, thereby ensuring reliable operation in the high-temperature environment near the battery cell.
3Quantity of substance
If battery cells are densely packed in narrow space, then energy density is improved, but difficulty in accurately measuring heat from each cell increases
Solution Approach 1:
The patent applies segmentation by providing individual support structures for each thermistor, allowing each battery cell to have its own dedicated temperature measurement system. This segmented approach enables accurate heat measurement from each cell even when densely packed, as each thermistor can be independently positioned and protected.
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
This design allows for effective temperature measurement near battery cells with reduced risk of wire damage and insulation issues, improving safety and minimizing cost increases, while maintaining reliable electrical connections.
Implementation Method 1
at least one thermistor provided on the interconnection board and seated in the module housing to measure the temperature of at least one battery cell among the plurality of battery cells
Implementation Method 2
at least one bus bar assembly mounted on at least a part of an outer surface of the module housing and electrically connected to the plurality of battery cells of the battery cell assembly
Data Source
AI summary
A battery module includes a battery cell assembly including a plurality of battery cells; a module housing having an inner space having the battery cell assembly accommodated therein; at least one bus bar assembly on at least a part of an outer surface of the module housing and electrically connected to the plurality of battery cells of the battery cell assembly; an interconnection board connected to the at least one bus bar assembly and configured to sense voltages of the plurality of battery cells of the battery cell assembly; and at least one thermistor on the interconnection board and disposed in the module housing to measure the temperature of at least one battery cell among the plurality of battery cells.