Battery Temperature Sensor Assembly for Cell Swelling Pressure
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Solution Overview
Problem
Existing temperature sensors in battery modules are prone to damage and suffer from reduced accuracy and reliability due to swelling of the cell stack or pressure during assembly, leading to potential ignition and explosion risks.
Innovation Solution
A temperature sensing assembly featuring a substrate, temperature sensor, bridge, and compression member, where the compression member surrounds the sensor and includes a through-hole to prevent interference and maintain close contact with the cell stack, ensuring the sensor's accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature sensor is directly mounted on the substrate without protection, then the assembly structure is simple, but the temperature sensor is prone to damage from cell stack swelling or assembly pressure
Solution Approach 1:
The patent applies beforehand cushioning by introducing a compression member between the bridge and substrate that can absorb swelling forces and assembly pressure before they reach the temperature sensor. The compression member acts as a protective cushion that deforms under pressure, preventing direct transmission of harmful forces to the sensor, thus resolving the contradiction between reliability improvement and structural complexity.
Solution Approach 2:
The patent uses an intermediary approach by placing the compression member as a mediator between the external environment (cell stack swelling, assembly pressure) and the temperature sensor. This intermediary component absorbs and mitigates the harmful effects of pressure and swelling, protecting the sensor without requiring a complete redesign of the assembly structure.
2Reliability
If the temperature sensor is protected by adding compression members and bridges, then the sensor reliability improves, but the assembly complexity increases
Solution Approach 1:
The patent applies the nested doll principle by arranging components in a nested configuration: the temperature sensor is mounted on the substrate, which is covered by the bridge, with the compression member positioned between them. This nested arrangement provides protection while maintaining a compact structure, reducing the apparent complexity compared to a distributed protection system.
Solution Approach 2:
The compression member functions as a flexible protective element that can deform under pressure while maintaining the integrity of the temperature sensor. This flexible protection approach allows the assembly to accommodate swelling and pressure without rigid structural modifications, balancing reliability improvement with structural simplicity.
3Measurement precision
If the temperature sensor maintains close contact with the cell stack under pressure, then temperature sensing accuracy is maintained, but the sensor may be damaged by excessive pressure
Solution Approach 1:
The compression member provides beforehand cushioning by absorbing excessive pressure before it reaches the temperature sensor. This allows the sensor to maintain close contact with the cell stack for accurate temperature sensing while the compression member prevents damage from assembly pressure or cell swelling by deforming in place of the sensor.
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 assembly prevents damage to the temperature sensor and maintains its accuracy and reliability by allowing it to remain in close contact with the cell stack, even under pressure or swelling conditions, thereby enhancing safety and operational efficiency.
Implementation Method 1
a compression member disposed between the bridge and the substrate, and disposed at both sides of the temperature sensor
Data Source
AI summary
A temperature sensing assembly according to an embodiment of the disclosure may include a substrate; a temperature sensor mounted at the substrate; and a bridge coupled to the substrate and at which a hole facing the temperature sensor is defined. A compression member is disposed between the bridge and the substrate, and is disposed at both sides of the temperature sensor.