Battery Pack Thermistor Assembly for Accurate Cell Temperature Sensing
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Solution Overview
Problem
Existing battery packs face challenges in accurately measuring and controlling the temperature of battery cells, leading to potential reliability issues due to improper positioning and orientation of thermistors, which affect the precision of temperature measurement.
Innovation Solution
A battery pack design that includes an assembling piece to control the positioning and posture of thermistors, ensuring they are oriented towards the upper end of battery cells, with a measurement line portion that is bent and surrounded by an open-loop shape, allowing precise temperature measurement and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermistor positioning is not precisely controlled, then assembly is simpler, but temperature measurement reliability deteriorates
Solution Approach 1:
The patent introduces an assembling piece as an intermediary component between the cell holder and the thermistor. This assembling piece includes positioning structures such as positioning holes and positioning protrusions that precisely control the thermistor's position and orientation. The intermediary structure enables reliable temperature measurement without requiring direct complex integration into the cell holder, thus resolving the contradiction between measurement reliability and device complexity.
2Measurement precision
If thermistor orientation is not controlled downward toward battery cells, then assembly is easier, but temperature measurement precision deteriorates
Solution Approach 1:
The assembling piece is pre-designed with downwardly inclined edges and positioning structures that automatically guide the thermistor into the correct downward orientation toward the battery cells during assembly. This preliminary configuration of the assembling piece eliminates the need for complex manual orientation adjustments, thereby maintaining ease of operation while ensuring precise temperature measurement.
3Reliability
If thermistor position deviates from battery cells, then assembly tolerance is larger, but temperature measurement reliability deteriorates
Solution Approach 1:
The assembling piece serves as a mediator that incorporates precise positioning features including positioning holes, positioning protrusions, and downwardly inclined edges. These features work together to constrain the thermistor's position and orientation, ensuring it is accurately positioned relative to the battery cells. The intermediary assembling piece absorbs the manufacturing precision requirements, allowing reliable temperature measurement while maintaining reasonable assembly tolerances.
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 design enhances the reliability of temperature measurement by precisely controlling the position and orientation of thermistors, improving the accuracy and efficiency of temperature monitoring in battery packs.
Implementation Method 1
a thermistor configured to measure temperature information of at least one of the plurality of battery cells
Data Source
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AI summary
A battery pack includes battery cells; a thermistor configured to measure temperature information of at least one of the battery cells; a cell holder configured to control an assembling position of the battery cells and including an assembling piece configured to cause an assembling position of the thermistor toward position not to deviate from the battery cells and an assembling posture of the thermistor oriented toward the battery cells; and a circuit portion connected to the thermistor that is configured to receive the measured temperature information from the thermistor. Accordingly, the reliability of the temperature measurement with respect to the battery cells may be improved.