Vehicle Backup Charging Control for Multi-Storage Power Load
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Solution Overview
Problem
The increased load on the on-vehicle power supply system due to supplying the same level of charging current to multiple power storages in a backup power source configuration.
Innovation Solution
An on-vehicle backup control device that includes multiple chargers and an adjustment unit to control charging currents to power storages, ensuring the sum of charging currents remains within an acceptable range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same level of charging current is supplied to each of the plurality of power storages, then the redundancy of power supply to the load is enhanced, but the load on the power storage device becomes increased
Solution Approach 1:
The patent changes the charging current parameters dynamically based on the number of power storages and system conditions. The control device calculates appropriate charging currents for each power storage unit, ensuring that the sum of charging currents does not exceed acceptable limits while maintaining adequate charging for redundancy. This resolves the contradiction by adjusting current parameters rather than applying fixed equal current to all units.
2Reliability
If multiple power storages are provided as backup power source, then the reliability of power supply is improved, but the charging load on the power supply system is increased
Solution Approach 1:
The patent applies partial charging action by controlling the charging current to each power storage unit to be less than the maximum possible current, such that the sum of all charging currents remains within acceptable system limits. This allows multiple power storages to be charged simultaneously for improved reliability without exceeding the power supply system's capacity, effectively implementing partial charging that balances reliability enhancement with energy consumption constraints.
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
Reduces the load on the on-vehicle power supply system by maintaining charging currents within acceptable limits, thereby optimizing power distribution.
Implementation Method 1
a plurality of chargers that supply a charging current based on power supplied from the first power source unit
Data Source
AI summary
An on-vehicle backup control device includes a plurality of chargers each of which supplies a charging current based on power supplied from a first power source unit, and an adjustment unit that controls the plurality of chargers. Each of the chargers performs an operation for supplying a charging current to a corresponding power storage. The adjustment unit adjusts the charging operations of the plurality of chargers so as to keep a sum of charging currents to the plurality of power storages within an acceptable range.