Dual Jump-Starting Bases for Galvanically Separated Vehicle Power Systems
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Solution Overview
Problem
Modern vehicles with multiple onboard power systems and start-stop functionality face challenges in efficient jump-starting and charging due to galvanic separation of batteries, limiting external power supply and increasing the risk of breakdowns and warranty costs.
Innovation Solution
The introduction of a second jump-starting base for each onboard power system, allowing independent external access and charging, using a DC converter or relay to manage power flow, and employing a Y-shaped cable configuration for simultaneous supply from a single external source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple onboard power systems are galvanically separated to improve reliability and independence, then battery failure risk is reduced, but external charging access becomes limited and jump-starting efficiency deteriorates
Solution Approach 1:
The vehicle's onboard power system is segmented into multiple independent partial power systems (first and second partial onboard power systems), each with its own energy accumulator and jump-starting base. This segmentation allows each battery system to operate independently, improving reliability while maintaining multiple access points for external charging through separate jump-starting bases.
2Device complexity
If a single jump-starting base is used for the main battery, then device complexity is reduced, but charging efficiency for multiple power systems deteriorates and time consumption increases
Solution Approach 1:
Each jump-starting base is designed with universal functionality to accept external current sources for charging any connected energy accumulator. The first jump-starting base can charge the first energy accumulator independently, and the second jump-starting base can charge the second energy accumulator independently, providing multi-functional charging capability that improves productivity without significantly increasing complexity.
3Power
If transfer cables with large line cross-section are used for high current jump-starting, then current carrying capacity is improved, but ease of operation and accessibility deteriorates when terminals are not freely accessible
Solution Approach 1:
Jump-starting bases serve as intermediary connection points between the energy accumulators and external current sources. These bases are strategically positioned in easily accessible locations (such as the engine compartment) and are electrically connected to the energy accumulators, allowing external charging without requiring direct access to the battery terminals themselves. This intermediary approach maintains high current carrying capacity while dramatically improving ease of operation.
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
Ensures rapid charging and jump-starting of all energy accumulators, reducing the risk of battery failures and breakdowns, and minimizing warranty costs by enabling efficient external power supply to all onboard power systems.
Implementation Method 1
The DC converter is electrically supplied by the partial onboard power system with the main battery and transmits electric power from the input-side basic onboard power system to the output-side additional-start onboard power system
Implementation Method 2
Each partial onboard power system is equipped with at least one rechargeable electric energy accumulator
Implementation Method 3
High currents flow in the case of a jump start (close to the kilo ampere range), so that the lines of the cable set have to have a correspondingly large line cross-section
Data Source
AI summary
A jump-starting arrangement is provided for a motor vehicle, wherein the motor vehicle has an engine control unit and a starter for an internal-combustion engine. The motor vehicle is equipped with at least two partial onboard power systems, which are mutually coupled by way of at least one electric separator element. Each partial onboard power system, respectively, is equipped with at least one rechargeable electric energy accumulator. The two partial onboard power systems each have a jump-starting base, and the respective jump-starting bases are galvanically separated from one another.