Battery Top Cover With Integrated Temperature Sensor
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Solution Overview
Problem
High-power battery packs with non-aqueous electrolytes face challenges in accurately measuring and managing the temperature of battery cells, which affects their performance and longevity due to heat generation during electrochemical reactions.
Innovation Solution
A top cover with a temperature measuring member is designed, featuring a cover plate with an opening and latching projections, allowing for secure contact with the battery cell, and made of elastic materials to ensure precise temperature measurement, integrated with a housing that includes a refrigerant flow path for cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature measuring member is mounted to measure battery cell temperature, then temperature measurement capability is improved, but the structure becomes more complex and difficult to assemble
Solution Approach 1:
The temperature measuring member is integrated into the top cover structure, merging the temperature measurement function with the existing protective cover component. This eliminates the need for separate mounting brackets or additional structural elements, thereby improving temperature measurement capability while avoiding increased structural complexity
Solution Approach 2:
The top cover serves multiple functions: it provides mechanical protection for the battery cells and simultaneously houses the temperature measuring member for thermal monitoring. By making the top cover multi-functional, the patent avoids adding dedicated separate structures for temperature measurement, thus improving measurement capability without proportionally increasing device complexity
2Measurement precision
If the temperature measuring member is made of elastic material to ensure close contact with battery cell, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent changes the material parameter of the temperature measuring member from rigid to elastic. This material parameter change allows the component to deform and adapt to the battery cell surface, ensuring close contact and accurate temperature measurement while reducing sensitivity to manufacturing dimensional tolerances
Solution Approach 2:
Only the portion of the top cover that contacts the battery cell is made of elastic material, while other portions of the top cover can maintain rigid structural properties. This localized application of elastic material ensures good thermal contact at the measurement point without requiring the entire structure to meet high manufacturing precision standards
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
This solution enables accurate temperature measurement and data transfer for battery cell supervision, improving the battery pack's thermal management and extending its lifespan by ensuring close contact between the temperature measuring member and the battery cell.
Implementation Method 1
a temperature measuring member mounted in the opening so as to measure a temperature of a battery cell of the plurality of battery cells, the temperature measuring member having a temperature measuring portion coming in contact with the battery cell
Implementation Method 2
the housing including a flow path of a refrigerant
Implementation Method 3
a housing in which the plurality of battery cells are accommodated, the housing including a flow path of a refrigerant
Data Source
AI summary
A top cover includes a cover plate covering a plurality of battery cells and having an opening in at least one portion thereof, and at least one temperature measuring member mounted in the opening so as to measure a temperature of one the battery cells, the temperature measuring member having a temperature measuring portion coming in contact with the battery cell.