Battery Module Thermal Plate for Accurate Cell Temperature Sensing
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Solution Overview
Problem
Existing temperature sensing methods for soft pack battery modules suffer from deviations in temperature measurement due to heat dissipation issues and unreliable connections, leading to inaccurate temperature readings.
Innovation Solution
A battery module design featuring a thermal conduction plate between batteries, with a temperature sensing element fastened by a fastening holder, ensuring close contact and accurate temperature acquisition through heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensing element is disposed on a connecting plate, then the temperature can be sampled, but the acquired temperature is higher than the actual temperature of the batteries due to heat dissipation issues and overcurrent through the connecting plate
Solution Approach 1:
The patent introduces a thermal conduction plate as an intermediary component between the batteries and the temperature sensing element. This plate is in direct thermal contact with the battery tabs and conducts heat from the batteries to the sensing element, ensuring accurate temperature measurement without exposing the sensing element to excessive heat or current on the connecting plate.
Solution Approach 2:
The patent segments the temperature sensing system into distinct functional components: the thermal conduction plate that contacts the batteries, the fastening holder that secures the assembly, and the temperature sensing element that measures temperature. This segmentation allows each component to perform its specific function optimally while isolating the sensing element from harmful conditions.
2Measurement precision
If a temperature sensing element is directly fastened to the batteries by using an adhesive, then the temperature can be sampled, but the connection reliability deteriorates over time due to temperature impact and battery expansion
Solution Approach 1:
The fastening holder acts as an intermediary mechanical structure that secures the thermal conduction plate and temperature sensing element without requiring adhesives to contact the batteries directly. This mechanical fastening system accommodates thermal expansion and contraction while maintaining secure connections over time.
Solution Approach 2:
The fastening holder design anticipates and accommodates future thermal expansion and adhesive degradation by providing a mechanical fastening structure that can absorb these changes. The holder is designed to maintain secure connections even after prolonged exposure to temperature cycles and battery expansion.
3Measurement precision
If a thermal conduction plate is used with a fastening holder, then the temperature sampling accuracy and reliability are improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the fastening holder: it secures the thermal conduction plate, positions the temperature sensing element, and provides a mounting structure for the entire assembly. This integration reduces the number of separate components and simplifies the overall structure while maintaining improved temperature sampling accuracy.
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
Reduces temperature deviation and improves reliability and accuracy of temperature sampling by maintaining close thermal contact between the sensing element and actual battery temperature.
Implementation Method 1
a thermal conduction plate, and a temperature sensing element. The plurality of batteries are arranged in a length direction. The thermal conduction plate is located between the adjacent batteries and fits the batteries. The temperature sensing element is in contact with the thermal conduction plate.
Data Source
AI summary
Disclosed is a battery module. The battery module includes a plurality of batteries, a thermal conduction plate, and a temperature sensing element. The plurality of batteries are arranged in a length direction. The thermal conduction plate is located between the adjacent batteries and fits the batteries. The temperature sensing element is in contact with the thermal conduction plate. In the battery module, the thermal conduction plate fits the batteries. Heat generated by the batteries is transferred to the thermal conduction plate. The temperature sensing element is in contact with the thermal conduction plate to acquire a temperature of the batteries. Because the temperature of the batteries that is acquired by the temperature sensing element via the thermal conduction plate is close to an actual temperature of the batteries, a deviation between the temperature acquired by the temperature sensing element and the actual temperature of the batteries can be reduced.