Pouch Cell Heat Conductor Layout for Reliable Temperature Sensing
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Solution Overview
Problem
Existing battery pack designs face challenges in achieving a compact and reliable temperature monitoring system for battery cells, often requiring additional elements like plugs and cables, which can lead to errors and reduced operational reliability.
Innovation Solution
A battery pack device with a heat conducting element and a temperature measuring unit where the temperature sensor is arranged outside the battery cell contact section, using a flexible printed circuit board for thermal coupling and a support unit for precise temperature determination, eliminating the need for additional measurement elements and enhancing assembly simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature sensor element is positioned between battery cells during operation, then temperature measurement is achieved, but the device complexity increases and reliability decreases due to susceptibility to damage from inadequate mounting
Solution Approach 1:
The temperature sensor element is extracted from the battery cell contact section and positioned outside it on the heat conducting element. This separation removes the sensor from the high-risk zone where it could be damaged by inadequate mounting or cell movement, while still allowing it to measure temperature through thermal coupling via the heat conducting element.
Solution Approach 2:
The heat conducting element serves as an intermediary between the battery cell and the temperature sensor element. It transfers thermal energy from the battery cell to the sensor, enabling accurate temperature measurement without requiring direct contact between the sensor and the battery cell, thus improving reliability.
2Measurement precision
If additional elements such as plugs and cables are used for temperature measurement, then temperature monitoring is achieved, but the device complexity increases and susceptibility to error increases
Solution Approach 1:
The temperature sensor element is integrated directly into the heat conducting element structure. This merging eliminates the need for separate plugs, cables, and mounting hardware that would otherwise be required to connect the sensor to the battery cell, thereby reducing device complexity and susceptibility to errors from additional connection points.
Solution Approach 2:
The heat conducting element performs multiple functions: it conducts heat away from the battery cell for thermal management and simultaneously serves as the mounting structure and thermal pathway for the temperature sensor element. This multi-functionality eliminates the need for dedicated sensor mounting hardware.
3Reliability
If the temperature sensor element is positioned outside the battery cell contact section, then device complexity is reduced and reliability is improved, but thermal coupling efficiency must be maintained
Solution Approach 1:
The heat conducting element provides a continuous thermal pathway from the battery cell to the temperature sensor element. This continuous thermal coupling ensures that temperature measurement remains accurate even though the sensor is positioned outside the battery cell contact section, maintaining thermal coupling efficiency while improving reliability.
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 achieves a compact, reliable, and cost-effective temperature monitoring system that reduces susceptibility to errors, increases battery cell lifespan, and ensures precise temperature measurement without damaging the temperature measuring unit.
Implementation Method 1
at least one heat conducting element (14) having at least one battery cell contact section (16) for arrangement on at least one battery cell (18) of the battery pack and for dissipating heat from the at least one battery cell (18)
Implementation Method 2
at least one temperature measuring unit (20) having at least one temperature sensor element (22) which is thermally coupled to the heat conducting element (14)
Data Source
AI summary
A battery pack device for a battery pack, in particular a pouch cell battery pack, includes at least one heat conducting element which has at least one battery cell contact section for arrangement on at least one battery cell, preferably between two battery cells, of the battery pack and for dissipating heat from the at least one battery cell. The battery pack device further includes at least one temperature measuring unit, which has at least one temperature sensor element thermally coupled to the heat conducting element. The temperature sensor element is arranged outside the battery cell contact section of the heat conducting element.