Battery Module Temperature Sensor Contact Stability
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Solution Overview
Problem
High-power battery modules require improved safety measures, particularly in temperature monitoring, to ensure reliable operation and prevent potential hazards such as thermal runaway in diverse applications like electric vehicles.
Innovation Solution
A battery module design that incorporates a temperature sensor in contact with battery cells, secured by a case with an elastic component like a leaf spring, to precisely measure cell temperatures and prevent sensor movement, ensuring accurate and stable temperature readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is placed in contact with battery cells to measure temperature, then temperature measurement precision is improved, but the sensor may move or lose contact leading to unreliable measurements
Solution Approach 1:
The case is designed with an elastic part that preliminarily exerts pressing force on the temperature sensor, ensuring continuous contact with the battery cell surface before any movement or thermal expansion occurs. This preliminary action maintains reliable measurement conditions throughout operation.
Solution Approach 2:
The case acts as an intermediary component between the temperature sensor and the external environment, providing mechanical support and maintaining sensor-battery contact through its elastic structure, thereby ensuring measurement reliability without interfering with the sensing function.
2Reliability
If the case structure is designed to press the temperature sensor against the battery cell, then contact stability is improved, but device complexity increases
Solution Approach 1:
The case incorporates an elastic part that functions as a flexible structural element, allowing the case to adapt to manufacturing tolerances and maintain sensor contact through elastic deformation rather than requiring complex adjustment mechanisms or rigid precision-fitted components.
Solution Approach 2:
The elastic part of the case utilizes changes in mechanical parameters (elastic deformation) to maintain constant pressing force on the temperature sensor across varying conditions, simplifying the overall structure by relying on material properties rather than complex mechanical systems.
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 enhances safety by enabling precise temperature measurement and control of battery modules, reducing contact resistance and manufacturing costs while maintaining accurate temperature monitoring across varying applications.
Implementation Method 1
The case may have an elastic part pressing the temperature sensor in the direction of the at least one battery cell
Implementation Method 2
a temperature sensor having a first surface contacting at least one battery cell of the plurality of battery cells to measure a temperature of the at least one battery cell
Data Source
AI summary
A battery module includes a plurality of battery cells, a temperature sensor and a case. The plurality of battery cells are aligned in one direction. The temperature sensor has a first surface contacting at least one battery cell of the plurality of battery cells to measure a temperature of the at least one battery cell. The case presses against a second surface of the temperature sensor opposite to the first surface of the temperature sensor. In the battery module, the contact between the first surface of the temperature sensor and the battery cell is maintained by the case. Accordingly, the temperature sensor can precisely measure the temperature of the battery cell, thereby improving the safety of the battery module.