Supercapacitor Starting Circuit With Adaptive Discharge Control
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Solution Overview
Problem
Existing supercapacitor auxiliary systems in vehicles fail to adjust current output automatically based on environmental and battery conditions, leading to energy waste and poor system adaptability, especially under low temperatures and frequent start-stop conditions, which can result in battery failure and reduced lifespan.
Innovation Solution
A supercapacitor control circuit with a main control module, charging and discharging control modules, voltage sampling modules, and an environmental information acquisition module, dynamically adjusts current output based on environmental conditions to provide intelligent starting mode identification and support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional supercapacitor auxiliary systems output fixed current during starting, then the system structure is simple, but the system adaptability deteriorates under varying temperatures and usage conditions
Solution Approach 1:
The patent implements dynamic current output control by the supercapacitor auxiliary system based on real-time detection of battery voltage and temperature conditions. The control circuit dynamically adjusts the duty cycle of the discharge switch to optimize starting performance under varying environmental conditions, transforming the fixed-current system into an adaptive dynamic system.
Solution Approach 2:
The patent employs feedback mechanisms where voltage sampling modules continuously monitor battery voltage and temperature sensors detect environmental conditions. This feedback information is fed to the control circuit, which adjusts the supercapacitor discharge current accordingly, enabling closed-loop control for optimal system adaptability.
2Loss of energy
If supercapacitor auxiliary system operates without intelligent control, then the device complexity is low, but energy waste increases and battery lifespan shortens
Solution Approach 1:
The patent implements preliminary charging control where the charging control circuit pre-charges the supercapacitor bank to optimal voltage levels before starting conditions arise. This preliminary action ensures the supercapacitor is ready to provide maximum auxiliary current when needed, reducing energy waste during actual starting operations.
Solution Approach 2:
The patent uses feedback control in the charging process where the control circuit monitors battery voltage and supercapacitor charge state to optimize charging current. This prevents overcharging and energy waste while extending battery lifespan through intelligent charge management.
3Power
If the supercapacitor system provides high current continuously, then the starting capability is improved, but the battery lifespan deteriorates due to accelerated aging
Solution Approach 1:
The patent implements partial action control where the supercapacitor provides high current only during the critical starting moment rather than continuously. The control circuit limits the duration and magnitude of discharge current based on actual starting requirements, providing sufficient power for engine cranking while minimizing stress on the battery and extending its lifespan.
Solution Approach 2:
The patent employs periodic charging cycles where the supercapacitor is recharged from the battery during non-starting periods. This periodic energy transfer allows the battery to recover and reduces cumulative stress, extending battery lifespan while maintaining starting capability when needed.
Data Source
AI summary
The present application provides a supercapacitor control circuit and method for intelligently identifying a starting mode of a vehicle, a power supply output terminal of a charging control module is connected to a power supply input terminal of a supercapacitor bank for receiving charging current for energy storage, a power supply output terminal of the supercapacitor bank is connected to a power supply input terminal of a discharging control module for receiving energy storage current and performing discharge control, a power supply output terminal of the discharging control module is connected in parallel to the power supply output terminal of a battery for cooperating with the battery to output instantaneous current required for vehicle start-up, a signal output terminal of an environmental information acquisition module is connected to a third sampled signal input terminal of a main control module for receiving environmental information and generating corresponding discharge control strategies.