Battery Voltage Conversion Control for Low-Temperature Power Stability
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Solution Overview
Problem
Existing battery systems suffer from reduced capacity utilization and shortened lifespan due to environmental temperature variations, leading to inefficient energy output and waste of battery capacity.
Innovation Solution
A control system and method that includes a battery, charging chip, voltage conversion module, and power supply management module, which dynamically adjusts operating modes based on battery voltage to ensure stable power supply, utilizing a DC-DC converter to maintain optimal voltage levels regardless of temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery discharging cutoff voltage is set to 3.5V to ensure stable power supply, then the system reliability is improved, but the battery capacity utilization deteriorates (only 20% capacity discharged at -20°C)
Solution Approach 1:
A DC-DC voltage conversion module is introduced as an intermediary between the battery and the powered system. This module converts the battery voltage (3.0V-4.2V) to a stable output voltage (3.3V or 5V) required by the system, allowing the battery to discharge to lower voltages (3.0V cutoff) while maintaining stable power supply to the load, thus resolving the contradiction between reliability and capacity utilization
Solution Approach 2:
The system dynamically adjusts the battery discharging cutoff voltage based on temperature conditions. At low temperatures (-20°C), the cutoff voltage is lowered to 3.0V to maximize capacity utilization, while the DC-DC converter ensures stable output voltage. This parameter change allows the system to achieve both reliability and full capacity utilization across different operating conditions
2Quantity of substance
If the battery discharging cutoff voltage is lowered to 3.0V to increase capacity utilization, then the battery capacity utilization is improved, but the system reliability deteriorates due to voltage instability
Solution Approach 1:
The DC-DC voltage conversion module acts as an intermediary that decouples the battery voltage from the system voltage requirements. It accepts a wide input voltage range (3.0V-4.2V) from the battery and provides a stable output voltage (3.3V or 5V) to the powered system, enabling the battery to discharge to 3.0V cutoff while maintaining system reliability
Solution Approach 2:
The voltage conversion module dynamically adjusts its conversion ratio based on the battery voltage and system requirements. As the battery voltage drops during discharge, the converter adjusts to maintain constant output voltage, ensuring reliable power supply throughout the entire discharge cycle from full charge to 3.0V cutoff
3Adaptability or versatility
If environmental temperature compensation is implemented to maintain consistent discharge voltage, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The DC-DC voltage conversion module automatically adapts to different temperature conditions and battery voltages without requiring external temperature compensation circuits or complex control logic. The module self-regulates the voltage conversion based on real-time battery voltage feedback, providing temperature-adaptive performance while keeping the control system simple
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
Enhances battery capacity utilization and extends device endurance by ensuring consistent power supply, overcoming temperature-related inefficiencies and improving battery life.
Implementation Method 1
utilizing a DC-DC converter to maintain optimal voltage levels
Data Source
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AI summary
A control system (100) and a method for improving battery output energy efficiency, and an electronic device. The system (100) comprises: a battery (10), a charging chip (20), a voltage conversion module (30), and a power supply management module (40). The battery (10) is used to send, when the control system (100) is not connected to an external power supply, battery voltage to the voltage conversion module (30) by means of the charging chip (20). The voltage conversion module (30) is used to receive the battery voltage, determine an operating mode on the basis of the battery voltage, acquire an output voltage corresponding to the operating mode, and output said output voltage to the power supply management module (40). The power supply management module (40) is used to convert and output at least one system voltage on the basis of the output voltage, said at least one system voltage being used to supply power to a powered system. The present system (100) is not impacted by high-temperature, low-temperature, or other environments, makes full use of the battery capacity of the power supply module, and lowers the cutoff voltage of the battery (10), thus solving the problems of automotive diagnosis for large power output and short long-duration driving, improving the use experience of a user.