Capacitor Power Supply Device for Battery Abnormality Backup
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Solution Overview
Problem
Capacitors in existing power supply systems are not fully utilized for supplying power to loads when a battery abnormality occurs, as they are primarily reserved for backup purposes only.
Innovation Solution
A power supply device with semiconductor switches and a control unit that connects a capacitor in series with the battery and in parallel with a resistor, allowing the capacitor to support the battery during normal operation and supply power to a backup load when the battery fails, effectively utilizing the capacitor's capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capacitor is used only for backup load operation when battery fails, then the backup load power supply is ensured, but the capacitor is not fully utilized effectively
Solution Approach 1:
The capacitor is designed to perform multiple functions: it charges during normal battery operation, supports the battery during high current demands, and supplies power to backup loads when the battery fails. This multi-functional design resolves the contradiction by making the capacitor universally applicable across different operational states, thereby improving utilization efficiency without compromising backup load power supply reliability
2Quantity of substance
If the capacitor charges during normal battery operation, then the capacitor capacity is built up for backup use, but the battery bears excessive burden during high current demands
Solution Approach 1:
The capacitor acts as an intermediary energy storage device between the battery and the load. During high current demands, the capacitor releases stored charge to supplement battery output, thereby mediating the burden on the battery. This resolves the contradiction by allowing the capacitor to accumulate charge during normal operation while protecting the battery from excessive stress during peak demands
3Adaptability or versatility
If multiple switches are used to control capacitor-battery-load connections, then the power supply control flexibility is improved, but the device complexity increases
Solution Approach 1:
The switching circuit is segmented into multiple independent switches (first switch for battery-capacitor connection, second switch for capacitor-load connection). Each switch handles a specific function, allowing flexible power supply control while maintaining manageable circuit complexity through functional decomposition
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 capacitor is fully utilized to supply power to the load during battery abnormalities, supporting the battery and preventing excessive burden on it by releasing electric charge during high current demands, thus maintaining power to critical vehicle functions.
Implementation Method 1
a capacitor (110), and a control unit (120)... the capacitor (110) can support the battery (200)... supplying power to a backup load (210)
Implementation Method 2
SW1, SW2, SW3, and SW4, each of which is constituted by a semiconductor switch... SW2, SW3, and the capacitor 110 are connected in series to the battery 200
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Effectively utilize a capacitor for supplying power to a load when a battery abnormality occurs. A power supply device for connecting to a battery and a load to which power is supplied from the battery includes: a capacitor; a first switch for switching a connection state between the battery and the capacitor; a second switch for switching a connection state between the capacitor and the load; and a control unit for detecting a state of charge of the capacitor and abnormality of the battery. When the abnormality of the battery is not detected, the control unit turns on the first switch and turns off the second switch when the capacitor is not charged, and maintains the first switch on after the capacitor is fully charged.