Secondary Battery Protecting Circuit with Heat Radiating Section
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Solution Overview
Problem
Existing secondary battery protecting circuits and hybrid power source equipment lack effective safety measures to prevent overcharge and temperature-related damage to nonaqueous secondary batteries, particularly in environments where batteries are exposed to high temperatures and varying light conditions.
Innovation Solution
A secondary battery protecting circuit comprising a first voltage detecting circuit with a temperature detecting section, a second voltage detecting circuit, a switch section, and a heat radiating section, which are connected in parallel with the secondary battery. The circuits detect excessive charge voltage and temperature, triggering the switch to divert accumulated power as heat when either condition is met, ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solar cell is used to generate electric power, then the electronic apparatus can be driven by renewable energy, but the solar cell cannot stably drive the electronic apparatus when light radiation is insufficient
Solution Approach 1:
The patent combines a solar cell and a secondary battery into a hybrid power source system. The solar cell generates power when light is available, and the secondary battery stores excess power and supplies power when the solar cell cannot meet the demand, achieving stable operation across varying light conditions.
Solution Approach 2:
The hybrid power source system serves multiple functions: the solar cell provides renewable energy generation, the secondary battery stores energy and provides power during insufficient light conditions, and the controlling unit coordinates between them. This multi-functional system ensures the electronic apparatus can operate reliably regardless of light availability.
2Use of energy by moving object
If the secondary battery is charged with excess electric power from the solar cell, then the battery capacity is utilized effectively, but the battery may suffer from overcharge damage when the charge voltage exceeds the full charge voltage
Solution Approach 1:
The controlling unit continuously monitors the charge voltage of the secondary battery and compares it with the full charge voltage threshold. When the charge voltage reaches or exceeds the full charge voltage, the controlling unit stops charging or activates the power radiating section to dissipate excess power, preventing overcharge damage while maximizing energy storage efficiency.
Solution Approach 2:
The system proactively prevents overcharge by detecting when the charge voltage approaches the full charge voltage threshold before actual overcharge damage occurs. The controlling unit prepares to stop charging or activate the power radiating section in advance, cushioning against potential battery damage.
3Power
If the electronic apparatus is exposed to solar light in high temperature environments, then the solar cell can generate power, but the secondary battery temperature rises excessively causing safety concerns
Solution Approach 1:
The patent converts the harmful effect of excess power and heat into a beneficial outcome by using the power radiating section to dissipate excess power as heat in a controlled manner. This prevents the secondary battery from overheating while still allowing the solar cell to generate power at full capacity, turning a potential safety hazard into a manageable condition.
Solution Approach 2:
The controlling unit dynamically adjusts the system operation based on temperature conditions. When the secondary battery temperature rises excessively, the controlling unit activates the power radiating section to dissipate power and reduce battery temperature, changing the operational parameters to maintain safety while preserving power generation capability.
4Reliability
If known protecting circuits are used to prevent overcharge, then the battery is protected from voltage damage, but no protection is provided against temperature-related damage
Solution Approach 1:
The controlling unit performs multiple protection functions: it monitors charge voltage to prevent overcharge damage and simultaneously monitors battery temperature to prevent thermal damage. The power radiating section serves dual purposes of managing excess power and controlling battery temperature, providing comprehensive protection against both voltage and temperature-related hazards.
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 effectively protects secondary batteries from overcharge and temperature-related damage by diverting excess power as heat, thereby enhancing safety and reducing the risk of battery deterioration, while maintaining stable power supply and miniaturizing solar cell modules.
Implementation Method 1
an electric power accumulated in the secondary battery is transformed into heat by the heat radiating section
Data Source
AI summary
Disclosed herein is a secondary battery protecting circuit connected in parallel with a nonaqueous secondary battery, the secondary battery protecting circuit including: a first voltage detecting circuit; a second voltage detecting circuit; a switch section; and a heat radiating section.