Battery Module Sensor Contact Structure for Accurate Cell Temperature
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Solution Overview
Problem
Existing battery modules face challenges in accurately measuring battery cell temperature due to unstable contact between temperature sensors and battery cells, leading to potential safety issues and reduced operational efficiency.
Innovation Solution
A battery module design featuring a flexible printed circuit board with a temperature sensor, an upper plate with an elastic member that presses the circuit board to ensure stable contact with the battery cell, and a compression pad for improved contact and durability, utilizing a thermistor for accurate temperature measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is connected to battery cells to monitor temperature, then safety and operation efficiency can be improved, but measurement accuracy deteriorates due to unstable contact between the sensor and battery cell
Solution Approach 1:
The elastic member is pre-installed on the upper plate to automatically press the temperature sensor against the battery cell when the battery module is assembled, ensuring stable contact before operation begins. This preliminary mechanical action eliminates the need for manual adjustment and maintains consistent measurement pressure throughout battery operation.
Solution Approach 2:
The elastic member provides dynamic, adaptive pressure to the temperature sensor-battery cell interface. As the battery expands or contracts during charging and discharging cycles, the elastic member automatically adjusts the contact force, maintaining optimal measurement pressure without requiring external control mechanisms.
2Measurement precision
If the temperature sensor is pressed firmly against the battery cell to improve contact stability, then measurement accuracy improves, but the complexity of the battery module structure increases
Solution Approach 1:
The upper plate serves multiple functions: it provides structural support for the battery cells, acts as a mounting surface for the elastic member, and transmits the elastic force to ensure temperature sensor contact. This multi-functionality eliminates the need for separate pressing mechanisms, reducing overall structural complexity while achieving stable measurement contact.
Solution Approach 2:
The elastic member is integrated into the upper plate structure and automatically performs the pressing function without requiring external actuators, motors, or control systems. The elastic force is generated passively through the mechanical design of the cutout structure, making the system self-regulating and simplifying the overall device architecture.
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 solution provides stable and accurate temperature measurement of battery cells by applying a force through the elastic member, enhancing safety and operational efficiency by maintaining consistent contact and improving measurement accuracy.
Implementation Method 1
an upper plate that is partially cut and thus an elastic member is formed, and the elastic member presses the portion of the flexible printed circuit board in which the temperature sensor is provided
Data Source
AI summary
A battery module including a temperature sensor according to an exemplary embodiment of the present invention includes: a flexible printed circuit board where the temperature sensor is provided; a battery cell that overlaps a portion of the flexible printed circuit board, in which the temperature sensor is provided; and an upper plate that is disposed above the flexible printed circuit board, wherein the upper plate is partially cut so as to define an elastic member, and the elastic member presses the portion of the flexible printed circuit board in which the temperature sensor is provided so as to cause the flexible printed circuit board to contact the battery cell.