Auxiliary Low-Voltage Bus Architecture for Vehicle Load Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Unequal load distribution across multiple auxiliary low voltage buses in vehicles leads to battery cell/module imbalance and performance issues.
Innovation Solution
Implementing a DC/DC bypass converter to adjust voltage levels between auxiliary low voltage buses and a central controller for power sharing and load balancing, using techniques such as differential voltage regulation and selective load management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple auxiliary low voltage buses are used to power different electrical loads, then the vehicle can support diverse electrical loads with different voltage requirements, but unequal load distribution causes battery cell/module imbalance and performance issues
Solution Approach 1:
The system continuously monitors voltage levels across multiple auxiliary low voltage buses and uses feedback control to regulate voltage. The controller adjusts DC/DC converters to equalize voltage levels, preventing unequal load distribution and maintaining battery cell balance while supporting diverse electrical loads with different voltage requirements
Solution Approach 2:
DC/DC bypass converters are introduced as intermediary devices between auxiliary low voltage buses to transfer power and equalize voltage levels. These converters act as mediators that balance the load distribution across different buses, preventing battery cell imbalance while maintaining the ability to support diverse electrical loads
2Reliability
If DC/DC converters are used to regulate voltage between auxiliary low voltage buses, then power distribution can be balanced, but system complexity increases
Solution Approach 1:
The patent combines multiple DC/DC converter functions into integrated converter units that can operate in parallel. These merged converters share common control logic and power stages, reducing overall system complexity while maintaining balanced power distribution across auxiliary low voltage buses
Solution Approach 2:
The DC/DC converters are designed with multi-functionality, serving both voltage regulation and power balancing functions simultaneously. This universal design reduces the need for separate dedicated devices, thereby lowering system complexity while achieving reliable power distribution balance
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
Achieves balanced power distribution across auxiliary low voltage buses, reducing battery cell imbalance and improving performance by equalizing load distribution.
Implementation Method 1
The DC/DC bypass converter converts electric power from the first auxiliary low voltage bus and delivers an adjusted electric power to the second auxiliary low voltage bus
Data Source
AI summary
Examples described herein provide a method that includes providing electric power at a first voltage level for a first auxiliary low voltage bus. The method further includes providing electric power at a second voltage level for a second auxiliary low voltage bus, the first voltage level differing from the second voltage level. The method further includes adjusting the second voltage level using a direct current (DC)/DC bypass converter. The DC/DC bypass converter converts electric power from the first auxiliary low voltage bus and delivers an adjusted electric power to the second auxiliary low voltage bus to regulate power drawn in the first auxiliary low voltage bus and the second auxiliary low voltage bus.