Battery Charging Circuit Isolation to Cut Converter Power Loss
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Solution Overview
Problem
Conventional power conversion devices experience unnecessary power consumption in voltage converters due to the supply of DC power during battery charging, leading to increased charging times.
Innovation Solution
A power conversion device with a charging circuit, voltage converter, and an interrupting unit that separates the power supply paths between the charging circuit and voltage converter, allowing for the interruption of DC power to the voltage converter during battery charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the voltage converter is connected to the electrical path during battery charging, then the system can continuously supply power to auxiliary devices, but unnecessary power consumption occurs in the voltage converter control unit
Solution Approach 1:
The electrical path is segmented into separate charging path and voltage conversion path. The interrupting unit divides the common electrical path into a charging circuit path and a voltage converter path, allowing independent control of power flow to each component. This enables the charging circuit to operate without unnecessary power consumption by the voltage converter control unit while maintaining the capability to supply power to auxiliary devices when needed.
Solution Approach 2:
The interrupting unit dynamically switches the connection state of the voltage converter to the electrical path based on the charging status. When the charging circuit is operating, the interrupting unit disconnects the voltage converter from the electrical path. When charging is complete or not operating, the voltage converter can be connected. This dynamic control eliminates unnecessary power consumption while preserving continuous power supply capability when required.
2Productivity
If DC power is supplied to the voltage converter during battery charging, then the voltage converter can operate, but charging time increases due to power consumption
Solution Approach 1:
The voltage converter is extracted from the active electrical path during battery charging operations. The interrupting unit removes the voltage converter connection to the electrical path when the charging circuit is supplying power to the battery. This extraction eliminates the parasitic power consumption that would otherwise occur in the voltage converter control unit, thereby improving charging speed and productivity without sacrificing the voltage converter's functionality when needed.
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 prevents the start of the control unit in the voltage converter, reducing power consumption and shortening charging times.
Implementation Method 1
a charging circuit configured to convert AC power input from an AC power supply into DC power
Implementation Method 2
a voltage converter configured to convert a power supply voltage of the first battery and output the converted voltage to a second battery
Data Source
AI summary
A power conversion device is applicable to a power supply system including a first battery and a second battery having a rated voltage different from a rated voltage of the first battery. The power conversion device includes a charging circuit configured to convert AC power input from an AC power supply into DC power and charge the first battery with the DC power, a voltage converter configured to convert a power supply voltage of the first battery and outputs the converted voltage to the second battery, and an interrupting unit configured to be capable of interrupting a supply of the DC power to the voltage converter during charging of the first battery by the charging circuit.