Rechargeable Battery Fuse Heating for Low Temperature Protection
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Solution Overview
Problem
Rechargeable batteries with fuse protection functions are ineffective at low temperatures, as the fusing process is slowed, compromising battery safety and protection.
Innovation Solution
Incorporating a heater with a heating element adjacent to the fuse, controlled by a processor and sensor that detects voltage or temperature thresholds, to accelerate the fusing process when preset conditions are met, thereby enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fuse is arranged between the charging interface and battery cell to protect against great charging current, then battery damage and burst can be avoided, but the fusing process takes certain time and is greatly affected by low temperature environment, compromising protection effectiveness
Solution Approach 1:
The heating element is activated before the fuse fusing process to pre-heat the fuse to its optimal fusing temperature. This preliminary heating action ensures that when excessive current occurs, the fuse can fuse immediately at the preset current threshold rather than requiring additional time for temperature buildup, especially in low temperature environments.
Solution Approach 2:
The system changes the temperature parameter of the fuse by introducing a heating element that can actively control and adjust the fuse temperature to an optimal range. This parameter change enables the fuse to maintain consistent fusing characteristics across different environmental temperatures, resolving the issue of temperature-dependent fusing speed.
2Device complexity
If the fuse relies solely on current-induced heating for protection, then the structure remains simple, but at low temperatures the fusing process cannot be speeded up even when current increases
Solution Approach 1:
A heating element is introduced as an intermediary component between the power source and the fuse. This intermediary actively manages the thermal state of the fuse, ensuring it reaches optimal fusing temperature regardless of ambient conditions. The heating element acts as a bridge that compensates for environmental temperature effects without fundamentally complicating the protection mechanism.
Solution Approach 2:
The passive thermal accumulation process of traditional fuses is replaced with an active thermal control system. Instead of relying solely on resistive heating from excessive current, the system uses a controlled heating element to actively manage fuse temperature, transitioning from a passive mechanical/thermal system to an actively controlled system.
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 solution ensures faster fuse activation and improved safety by releasing heat to the fuse when critical conditions are detected, effectively addressing the temperature-dependent limitations of existing fuse protection systems.
Implementation Method 1
a heater which comprises a control element and a heating element, wherein the control element controls the heating element to release heat to the fuse upon receiving a control signal
Data Source
AI summary
A rechargeable battery assembly and a terminal device are provided. The rechargeable battery assembly includes a battery main body which includes a charging interface, a fuse, and a battery cell, the fuse is arranged between the battery cell and the charging interface, and a current input from the charging interface is conducted to the battery cell via the fuse when the battery cell is charged. The rechargeable battery assembly further includes a heater which includes a control element and a heating element, and the control element controls the heating element to release heat to the fuse upon receiving a control signal. The rechargeable battery assembly further includes a sensor configured to detect the current parameter of the battery cell, and a processor configured to acquire the parameter from the sensor, and transmit the control signal to the control element when it is determined that the parameter satisfies a preset condition.