Battery Module Temperature Sensing With Pressed Top-Cover Contact
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Solution Overview
Problem
Existing battery module temperature collection methods face inaccuracies due to poor contact between temperature sensors and top covers, particularly under severe working conditions, and are limited to battery modules with harness plates.
Innovation Solution
A battery module design featuring a temperature collection unit with a temperature sensor and thermal conducting pad, where the bearing structure, connected to the circuit board and bus bar, presses the temperature collection structure against the top cover for improved contact accuracy, and includes elastic sheets for enhanced stability and electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is used to detect the temperature of the top cover, then temperature collection accuracy is improved, but contact tightness and stability between the sensor and top cover are poor
Solution Approach 1:
A bearing structure is introduced as an intermediary component between the temperature sensor and the top cover. This bearing structure includes a bearing body that contacts the top cover and provides a stable mounting position for the temperature sensor, ensuring both tight contact and measurement accuracy without directly modifying the sensor or top cover.
Solution Approach 2:
The bearing structure utilizes elastic deformation of its components to maintain consistent contact pressure between the temperature sensor and the top cover. By designing the bearing body with appropriate elasticity, the system adapts to thermal expansion and contraction while maintaining reliable electrical and thermal contact.
2Device complexity
If the temperature sensor is directly mounted on the top cover, then device complexity is reduced, but contact stability deteriorates under severe working conditions
Solution Approach 1:
The bearing structure serves as a mediating component that bridges the temperature sensor and top cover. It provides a stable mounting interface without requiring complex fastening mechanisms, maintaining structural simplicity while ensuring reliable contact under varying working conditions through its elastic design.
3Reliability
If the temperature sensor is pressed against the top cover with force, then contact tightness is improved, but the risk of undetectability increases without proper positioning
Solution Approach 1:
The bearing structure acts as a positioning intermediary that distributes the contact force evenly between the temperature sensor and the top cover. It includes features like limiting grooves that prevent lateral displacement of the sensor, ensuring both tight contact and accurate temperature detection by maintaining proper sensor alignment.
Solution Approach 2:
The bearing structure creates an equipotential contact surface that ensures uniform pressure distribution across the temperature sensor contact area. This prevents localized stress concentrations that could cause sensor displacement or damage, maintaining both contact reliability and measurement 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
This design enhances temperature collection accuracy and stability, allowing for reliable temperature monitoring even without harness plates, and facilitates efficient signal transfer to the battery management system.
Implementation Method 1
the thermal conducting pad is arranged between the temperature sensor and the top cover
Implementation Method 2
the bearing structure electrically connects the temperature sensor and the circuit board, and presses, under an effect of at least one of the circuit board and the bus bar, the temperature collection structure to be abutted against the top cover
Implementation Method 3
the bearing structure includes a bearing body and an elastic sheet, wherein the temperature sensor and the elastic sheet are both arranged on the bearing body
Data Source
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AI summary
The present application relates to the technical field of batteries, in particular to a battery module and a device. The battery module provided in the present application includes at least two batteries, a bus bar, a circuit board and at least one temperature collection unit, the temperature collection unit includes a temperature collection structure and a bearing structure, the temperature collection structure includes a temperature sensor, the temperature sensor collects temperature of the top cover of the battery and is arranged on the bearing structure, and the bearing structure electrically connects the temperature sensor and the circuit board, and presses, under an effect of at least one of the circuit board and the bus bar, the temperature collection structure to be abutted against the top cover. In the present application, the temperature collection structure can be in closer contact with the top cover, which is beneficial for improving accuracy in temperature collection of the battery module.