Battery Lifespan Booster Circuit for Peak Load Voltage Stability
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Solution Overview
Problem
Current methods for extending battery lifespan, such as using decoupling capacitors and DC-DC converters, face challenges like increased space and cost requirements due to high peak load currents and pulsed discharge, and they often result in voltage drops that necessitate larger capacitors, leading to inefficiencies.
Innovation Solution
A circuit and method for autonomous battery lifespan boosting, which includes a DC-DC converter positioned in parallel to a current sensing module and a capacitor, autonomously switches between charging and discharging modes based on current sensing, effectively managing battery discharge and maintaining voltage levels without external circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a large decoupling capacitor is used to reduce battery discharge current peaks, then the voltage drop is reduced and battery lifespan is extended, but the capacitor occupies large PCB area and increases cost
Solution Approach 1:
The patent implements a dynamic current limiting mechanism that adjusts the current limit threshold based on real-time detection of battery voltage and temperature conditions. The current limit is not fixed but dynamically adapted to operating conditions, allowing the system to optimize between protecting the battery and maintaining power delivery capability without requiring oversized passive components
Solution Approach 2:
The system changes the operating parameters of the power supply circuit by dynamically adjusting the current limit threshold parameter based on battery state. This parameter change allows the circuit to operate efficiently across different battery conditions, extending battery lifespan through intelligent control rather than through large passive components
2Duration of action of stationary object
If a current limiter is inserted in series with the battery to reduce discharge current, then the battery current peaks are reduced, but the output voltage drops to a level where the system fails
Solution Approach 1:
The patent employs dynamic adjustment of the current limit threshold based on real-time battery voltage and temperature detection. When battery voltage sags or temperature rises, the current limit is reduced to protect the battery; when conditions are favorable, the current limit is increased to maintain adequate power output. This dynamic behavior resolves the contradiction between current limiting and voltage maintenance
Solution Approach 2:
The system implements a feedback control mechanism where the detected battery voltage and temperature are fed back to dynamically adjust the current limit threshold. This closed-loop control ensures that the current limiting action does not cause excessive voltage drop, as the system continuously monitors and compensates to maintain stable output voltage while protecting the battery
3Power
If a DC-DC converter is added to stabilize output voltage during high load pulses, then the voltage drop is compensated, but the converter remains connected in series with the battery causing continuous power loss
Solution Approach 1:
The patent dynamically controls the switching state of the MOSFET based on real-time detection of battery voltage and current conditions. The MOSFET is switched on or off to connect or disconnect the current limiting circuit, thereby dynamically adjusting the power loss characteristics. This dynamic switching eliminates the need for continuous series connection, reducing energy loss while maintaining voltage stability when needed
Solution Approach 2:
The system employs periodic switching of the MOSFET based on detected battery conditions and load requirements. Rather than maintaining continuous series connection, the circuit periodically connects and disconnects the current limiting path, achieving voltage stabilization only when necessary while minimizing continuous power loss through intelligent periodic control
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 extends battery lifespan by reducing the rate of voltage drop and internal resistance buildup, achieving efficient power management with minimal additional space and cost, and ensuring consistent performance across varying load conditions.
Implementation Method 1
a direct current to direct current, DC-DC, converter positioned in parallel to the current sensing module and the electrical load path
Data Source
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AI summary
A circuit (100) for autonomous battery lifespan boosting, the circuit (100) comprising a power source (300), an output (600), a current sensing module (500) located on an electrical load path between the power source (300) and the output (600), a direct current to direct current, DC-DC, converter (200), and a capacitor (400) electronically connected to the DC-DC converter (200).