Parallel Switch Rectifier Circuit for Battery Overcharge Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional current control circuits for secondary batteries often lead to excessive heating of diodes due to continuous current flow, increasing the likelihood of overcharge or overdischarge states.
Innovation Solution
An electric storage device protection apparatus with switches and a controller that dynamically adjusts the state of switches connected in parallel, ensuring the rectifier component is only active when necessary, thereby reducing heating and preventing overcharge or overdischarge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current control circuit continuously monitors and controls charge/discharge current through diodes, then overcharge and overdischarge are prevented, but excessive heating occurs in the rectifier component
Solution Approach 1:
The patent applies dynamics by making the switch connected in series with the rectifier component dynamically controllable between open and closed states based on battery voltage conditions. The controller switches the rectifier component on only when voltage drops below a threshold (preventing overdischarge) and turns it off when voltage recovers, thereby reducing unnecessary continuous operation and associated heating while maintaining protection reliability.
Solution Approach 2:
The patent implements periodic action by using intermittent switching of the rectifier component rather than continuous operation. The controller periodically monitors battery voltage and activates the rectifier component only during periods when voltage falls below the threshold, creating a pulsed operation pattern that reduces cumulative heating while maintaining protective function throughout the monitoring cycle.
2Reliability
If the rectifier component operates continuously to control current flow, then battery protection is maintained, but energy loss increases due to heating
Solution Approach 1:
The patent applies dynamics by making the switch connected in series with the rectifier component dynamically controllable between open and closed states based on battery voltage conditions. The controller switches the rectifier component on only when voltage drops below a threshold (preventing overdischarge) and turns it off when voltage recovers, thereby reducing unnecessary continuous operation and associated heating while maintaining protection reliability.
Solution Approach 2:
The patent implements periodic action by using intermittent switching of the rectifier component rather than continuous operation. The controller periodically monitors battery voltage and activates the rectifier component only during periods when voltage falls below the threshold, creating a pulsed operation pattern that reduces cumulative heating while maintaining protective function throughout the monitoring cycle.
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
This configuration effectively minimizes heating of the rectifier component and reduces the likelihood of overcharge or overdischarge states in electric storage devices by controlling current flow through the rectifier component.
Implementation Method 1
a rectifier component connected in series to one of the switches between a pair of common connection points of the switches
Implementation Method 2
when determining that the electric storage device is in a first state where a voltage of the electric storage device is within a reference range
Data Source
AI summary
An electric storage device protection apparatus includes switches arranged between an electric device and an electric storage device and connected in parallel to each other, and each of which being configured to be switched to be in an open state and a closed state, a rectifier component connected in series to one of the switches between a pair of common connection points of the switches, and a controller configured to perform a process to make the one of the switches that is connected to the rectifier component to be in the closed state and make another one of the switches to be in the open state when determining that the electric storage device is in a state where a voltage of the electric storage device becomes higher than a reference range.