Battery Module Thermistor Compression for Accurate Temperature Sensing
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Solution Overview
Problem
Existing battery modules face premature power limitation due to temperature discrepancies between the connecting plate and internal battery temperature, leading to inefficient performance under high-power conditions.
Innovation Solution
A battery module design where a thermistor is pressed against the top cover of the battery using a compression element, ensuring the collected temperature accurately reflects the internal battery temperature, with a short temperature transfer path for rapid and precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature is collected on the connecting plate using a thermistor on a flexible circuit board, then the temperature collection structure is simple, but the collected temperature does not accurately reflect the internal battery temperature, leading to premature power limitation
Solution Approach 1:
The patent introduces a heat conduction component as an intermediary between the battery and the thermistor. This mediator transfers heat from the battery internal temperature to the thermistor, enabling accurate temperature measurement without direct contact between the thermistor and battery, thus resolving the contradiction between measurement accuracy and structural simplicity
Solution Approach 2:
The patent replaces the traditional mechanical contact method (direct placement of thermistor on battery) with a thermal field-based measurement approach. By using the heat conduction component to transfer thermal energy, the system achieves accurate temperature measurement without requiring complex mechanical integration, thereby maintaining structural simplicity while improving measurement precision
2Measurement precision
If the thermistor is pressed against the top cover using a compression element, then the temperature transfer path is shortened and measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The compression element is pre-configured to apply pressing force on the heat conduction component, ensuring optimal thermal contact between the battery, heat conduction component, and thermistor before operation. This preliminary action establishes the best possible temperature transfer path, improving measurement accuracy without requiring complex real-time adjustment mechanisms
Solution Approach 2:
The patent utilizes the compressibility parameter of the heat conduction component to enhance thermal contact. By applying compression, the physical state of the heat conduction component changes, improving its thermal conductivity and contact area with the battery and thermistor, thereby achieving better measurement accuracy with a relatively simple structural addition
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 design enhances the battery module's performance by accurately controlling power output, reducing premature power limitations, and optimizing the structure and efficacy of the battery module, thereby improving vehicle performance and reliability.
Implementation Method 1
a thermistor pressed against the top cover of the battery by a compression element... the collected temperature value is transmitted to a component such as a circuit board... the temperature of the top cover is relatively consistent with an internal temperature of the battery
Data Source
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AI summary
Embodiments of this application relate to the technical field of batteries, and provide a battery module, a battery pack, and a vehicle to optimize a structure of the battery module. The battery module includes a battery, a harness plate, a circuit board, a compression element, and a temperature collection assembly. The battery includes a top cover. The harness plate is disposed on a top outer side of the top cover. The compression element is connected above the harness plate. The temperature collection assembly includes a thermistor. The thermistor is electrically connected to the circuit board, and the thermistor is disposed between the top cover and the compression element. The compression element presses the thermistor so that the thermistor is pressed against the top cover. The battery module provided in the foregoing technical solution shortens a temperature collection path and makes measurement accurate.