Battery Control Circuit for Emergency Power Readiness
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Solution Overview
Problem
Lithium-Ion batteries require specific charge management to avoid overcharging, which causes premature aging, and there is a need for a battery system that can be permanently charged without overcharging and provide reliable, uninterrupted power when needed, especially for emergency applications like aircraft.
Innovation Solution
An electronic system for a battery that includes a charging circuit with a charging switch and diode, a discharge circuit with diodes to manage current flow, and a control unit that regulates charge and discharge to prevent overcharging and ensure continuous power availability, featuring multiple discharge circuits for varying current demands and a safety switch for redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Li-Ion batteries are permanently connected to main power supply for charging, then the battery remains ready for emergency use, but overcharging occurs causing premature aging
Solution Approach 1:
The control unit continuously monitors battery charge state and uses feedback signals to regulate the charging circuit, stopping charging when the battery reaches full capacity to prevent overcharging while maintaining readiness for emergency use
Solution Approach 2:
The control unit acts as an intermediary between the main power supply and the Li-Ion battery, managing the charging process to prevent direct uncontrolled connection that would cause overcharging
2Reliability
If the battery is required to deliver power instantly in emergency situations, then power availability is ensured, but interruption or delay in power delivery may occur
Solution Approach 1:
The battery is pre-charged to full capacity during normal operation through the controlled charging system, so that when emergency occurs, power is immediately available without delay
Solution Approach 2:
The charging circuit remains connected and active during normal operation, maintaining continuous charging readiness so the battery can immediately transition to discharge mode without interruption when emergency power is needed
3Power
If multiple discharge circuits are provided for varying current demands, then power delivery capability is improved, but device complexity increases
Solution Approach 1:
The discharge system is segmented into multiple independent discharge circuits, each capable of handling different current levels, allowing the battery to deliver appropriate power for different emergency scenarios
Solution Approach 2:
The discharge circuits are designed to handle multiple functions - from low current standby operations to high current emergency power delivery, reducing the need for separate specialized circuits
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 system effectively maintains optimal battery charge without overcharging, ensures reliable discharge without interruption, and manages high currents during emergency power demands, extending battery lifespan and ensuring immediate power availability.
Implementation Method 1
a discharge diode disposed in the charging circuit in parallel with the charger
Implementation Method 2
Electrical energy is produced by electrochemical reactions during discharge of the battery
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The system has a discharging circuit (20) placed in parallel with a charging circuit (30) and comprising a discharge switch (K2). An electronic control unit controls opening and closing of the switch and controls a charger (K3C) of the circuit (30). The control unit ensures trickle charging of the battery as long as the battery is not called for discharge. The control circuit interrupts battery charging and sets the switch in a closed position, when a call for power is detected. A discharge diode (D3) allows passage of discharge current during a transitional phase of closing of the switch.