Battery Cell Temperature Sensing Layout for Water-Cooled Modules
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Solution Overview
Problem
Existing water cooling methods for battery cells in vehicles fail to accurately identify temperature differences within the battery cell module due to reliance on measuring only one portion, leading to inaccurate temperature estimation of the entire module.
Innovation Solution
A temperature measurement apparatus with multiple temperature sensors arranged below a water-cooled battery cell module, using a cooling conductor with grooves for sensor placement, an insulating plate with through-holes, and a battery cell module for direct contact measurement, along with an electronic control unit for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single temperature sensor is used to measure one portion of the battery cell module, then the device complexity is reduced, but the measurement precision of the entire module is insufficient
Solution Approach 1:
The battery cell module is divided into multiple measurement zones with temperature sensors placed at different locations (upper portion, lower portion, and side portions). Each sensor independently measures temperature at its specific location, enabling comprehensive temperature mapping of the entire module rather than relying on a single measurement point.
Solution Approach 2:
The temperature measurement system transitions from a single-point measurement to a multi-dimensional measurement approach by placing sensors at various spatial positions throughout the battery cell module. This spatial distribution across different dimensions (height, width, depth) enables comprehensive temperature field characterization.
2Measurement precision
If temperature sensors are placed inside the battery cell module, then the measurement precision is improved, but the ease of manufacture deteriorates due to complex installation
Solution Approach 1:
Temperature sensors are pre-installed in the cooling plate before the battery cell module is assembled. The cooling plate is manufactured with pre-formed grooves that accommodate the sensors, allowing sensor installation to be completed during the cooling plate fabrication process rather than requiring complex post-assembly installation inside the battery module.
Solution Approach 2:
The cooling plate serves as an intermediary component that houses the temperature sensors and facilitates their connection to the battery cell module. The sensors are installed in the cooling plate which then makes contact with the battery cells, simplifying the overall installation process by decoupling sensor mounting from battery module assembly.
3Measurement precision
If multiple temperature sensors are arranged below the battery cell module on the cooling conductor, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The cooling plate is designed to serve multiple functions simultaneously: it provides thermal management for the battery cells and houses the temperature sensors. The grooves in the cooling plate that accommodate the sensors are formed as part of the cooling plate manufacturing process, making the sensor mounting structure an integrated feature rather than an additional component.
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
Accurately measures temperature values at multiple locations, including differences between upper and lower portions of the battery cell, enhancing temperature uniformity and accuracy across the module.
Implementation Method 1
a cooling conductor having a refrigerant flow passage formed in an inward longitudinal direction
Implementation Method 2
a cooling conductor having a refrigerant flow passage formed in an inward longitudinal direction
Data Source
AI summary
The present disclosure relates to an apparatus of measuring a temperature of a battery cell, which may measure temperature values at a plurality of locations through a plurality of temperature sensors arranged at the locations below a water-cooled battery cell module, and thus may identify a temperature difference between an upper portion and a lower portion of a battery cell, which is not visually identified, as well as all temperature values at all locations below the battery cell.