Battery Temperature Sensor Mounting via Connecting Terminal
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Solution Overview
Problem
Existing battery systems face challenges in accurately and securely positioning temperature sensors to detect battery temperature, leading to potential slippage and inadequate detection of abnormal temperature states, which can result in safety issues such as battery degradation, smoking, or burning.
Innovation Solution
A battery system design that fixes a temperature sensor to a connecting terminal near the electrode terminal of battery cells, ensuring a thermally coupled and stable position for precise temperature detection, with the sensor connected to a protection circuit to manage charging and discharging currents based on temperature thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature sensor is coupled to the separator between battery cells, then the sensor can detect battery temperature, but the sensor cannot be precisely positioned at the optimal location and may slip over time
Solution Approach 1:
The patent introduces a temperature sensor holder as an intermediary component that couples the temperature sensor to the battery case rather than directly to the separator. This holder is fixed at a specific position on the battery case, serving as a stable mediator that ensures both precise temperature detection near the electrode terminal and reliable long-term positioning without slippage
Solution Approach 2:
The temperature sensor holder is pre-installed and fixed to the battery case at the optimal position before the battery cells are assembled. This preliminary action ensures that when the battery is assembled, the temperature sensor is already positioned at the ideal location for detecting temperature near the electrode terminal, eliminating positioning errors and preventing slippage during operation
2Ease of manufacture
If the temperature sensor is disposed freely to detect battery temperature, then the sensor can be easily installed, but the sensor cannot maintain a fixed position without slippage in the long term
Solution Approach 1:
The temperature sensor holder acts as a fixed intermediary structure attached to the battery case, providing a stable mounting point for the temperature sensor. This holder simplifies installation by providing a predetermined mounting location while simultaneously ensuring long-term positional stability, preventing the sensor from slipping during battery operation
Solution Approach 2:
The patent extracts the temperature sensor mounting function from the separator and relocates it to the battery case via the temperature sensor holder. This separation allows the sensor to be firmly anchored to the battery case at a fixed position, ensuring both easy installation and long-term stability without being constrained by the separator's position
3Ease of manufacture
If the temperature sensor is not thermally coupled to the electrode terminal, then the installation is simpler, but the temperature detection accuracy and speed are reduced
Solution Approach 1:
The temperature sensor holder is specifically positioned at a location on the battery case that is thermally coupled to the electrode terminal of the battery cell. This localized positioning ensures that the temperature sensor detects the temperature at the critical region near the electrode terminal where heat generation occurs, providing accurate and timely temperature detection while maintaining simple installation through the holder structure
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 allows for quick and accurate temperature detection, preventing overcharge or overdischarge and ensuring safety by maintaining the temperature sensor in a fixed, thermally ideal position without slippage, thereby enhancing the reliability of battery operation and preventing potential safety hazards.
Implementation Method 1
the connecting terminal is fixed at the voltage detecting location. The temperature sensor is provided at the connecting terminal, and is fixed to the connecting terminal in a thermally coupling state
Data Source
AI summary
A battery system comprises an assembled battery in which a plurality of battery cells are connected in series, a temperature sensor for detecting temperature of the battery cells of the assembled battery, and a voltage detecting line connected to a voltage detecting location of the battery cell. Further the battery system fixes the connecting terminal at the voltage detecting location. The connecting terminal fixes the temperature sensor in a thermally coupling state, and electrically connects the voltage detecting line.