Battery Module Temperature Sensor Mounting for Reliable Cell Contact
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Solution Overview
Problem
The reliability of temperature data in battery modules is compromised due to poor contact between the battery cell and the temperature sensor.
Innovation Solution
A battery module design featuring a sensing device with a temperature sensor firmly attached to the bus bar assembly using an elastic bracket, which provides a restoring force to maintain close contact with the battery cell, ensuring accurate temperature measurement without additional manufacturing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature sensor is simply placed near the battery cell, then the device complexity is reduced, but the measurement precision deteriorates due to poor contact
Solution Approach 1:
The elastic bracket is designed to be deformable, allowing it to dynamically adjust its shape during assembly. When the bus bar assembly is installed, the bracket deforms under compression and generates elastic restoring force to press the temperature sensor against the battery cell, ensuring reliable contact without complex fastening mechanisms
Solution Approach 2:
The elastic bracket utilizes its own elastic restoring force to maintain contact between the temperature sensor and battery cell. The system is self-regulating, where the bracket automatically adjusts the pressing force based on its deformation state, eliminating the need for additional actuators or complex control mechanisms
2Reliability
If additional fastening components are added to secure the temperature sensor, then the reliability of contact is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The temperature sensor mounting function is merged with the bus bar assembly structure. The elastic bracket is integrated into the bus bar assembly, and the temperature sensor is mounted on the bracket, creating a unified sensing device that simplifies assembly to a single installation step without requiring separate fastening operations
Solution Approach 2:
The elastic bracket changes its physical state from a relaxed configuration to a deformed configuration during assembly. This parameter change in shape generates the necessary elastic restoring force to maintain reliable contact, transforming a potential complexity (need for fastening) into a simple elastic deformation process
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 ensures reliable and accurate temperature measurement by maintaining consistent contact between the temperature sensor and the battery cell, enhancing the reliability of temperature data in battery modules.
Implementation Method 1
an elastic bracket pressing the temperature sensor toward the battery cell through elastic force
Data Source
AI summary
A battery module includes a cell stack including a plurality of battery cells stacked therein, a bus bar assembly coupled to a side of the cell stack, on which an electrode lead of the battery cell is disposed, and a sensing device coupled to the bus bar assembly and measuring a temperature of the battery cell. The bus bar assembly is coupled to the cell stack in a vertical direction, and the sensing device includes a temperature sensor disposed in close contact with the battery cell, and an elastic bracket pressing the temperature sensor toward the battery cell through elastic force.