Segmented Vehicle Battery Charging for EMI-Limited Power Supply

Solution Overview

Problem

The challenge of managing electromagnetic interference (EMI) and capacitance limitations during the charging of rechargeable energy storage systems in vehicles, particularly heavy electric vehicles, which affects the design and capacity of the energy storage system and the operation of additional components during charging.

Innovation Solution

A method and control arrangement that segregates the charging of a first set of segments of the rechargeable energy storage system from an external power source while powering a separate second set of segments to electric components, thereby reducing EMI and allowing for increased energy storage capacity and component operation without exceeding capacitance and EMI limitations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the rechargeable energy storage system is charged using a high charging voltage to ensure sufficient system voltage and power, then the charging efficiency and power delivery capability are improved, but electromagnetic interference EMI increases and electromagnetic compatibility EMC deteriorates

Engineering Contradiction:

Improvesystem voltage and powerVSAvoidelectromagnetic interference EMI

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent divides the rechargeable energy storage system into multiple segments that can be independently connected or disconnected from the electric propulsion system. During charging, only a first set of segments is connected to receive charge, while a second set of segments remains disconnected. This segmentation allows the system to achieve high charging voltage and power when needed while limiting the number of connected segments during charging to reduce electromagnetic interference and maintain electromagnetic compatibility.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If a large number of battery cells are used in each segment to ensure sufficient system voltage and power, then the energy storage capacity is improved, but the Y-capacitance increases and electromagnetic compatibility EMC deteriorates

Engineering Contradiction:

Improvenumber of battery cellsVSAvoidY-capacitance

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The patent divides the rechargeable energy storage system into multiple segments that can be independently connected or disconnected from the electric propulsion system. During charging, only a first set of segments is connected to receive charge, while a second set of segments remains disconnected. This segmentation allows the system to achieve high charging voltage and power when needed while limiting the number of connected segments during charging to reduce electromagnetic interference and maintain electromagnetic compatibility.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If additional electric components are operated during charging to enhance vehicle functionality, then the versatility and user experience are improved, but the electromagnetic interference EMI increases and charging safety is compromised

Engineering Contradiction:

Improvecomponent operation capabilityVSAvoidelectromagnetic interference EMI

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent divides the rechargeable energy storage system into multiple segments that can be independently connected or disconnected from the electric propulsion system. During charging, only a first set of segments is connected to receive charge, while a second set of segments remains disconnected. This segmentation allows the system to achieve high charging voltage and power when needed while limiting the number of connected segments during charging to reduce electromagnetic interference and maintain electromagnetic compatibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic control of segment connections based on the charging state and operational requirements. The control arrangement can switch between different segment configurations during charging operations, allowing flexible operation of electric components while maintaining electromagnetic compatibility. This dynamic approach enables the system to adapt to varying operational needs while managing electromagnetic interference during charging.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250313126A1Method of managing the supply of electrical energy in a vehicle, control arrangement, and vehicle

Publication Date: 2025.10.09 SCANIA CV AB

AI summary

A method of managing the supply of electrical energy in a vehicle is disclosed. The vehicle comprises an electric propulsion system, a rechargeable energy storage system configured to provide electricity to the electric propulsion system during operation of the vehicle, a number of electric components, and an electrical connector for the connection to an external electric power source. The method comprises the steps of charging a first set of segments of the rechargeable energy storage system using electricity from the external electric power source and connecting a second set of segments of the rechargeable energy storage system to at least one electric component. The present disclosure further relates to a computer program, a computer-readable medium, a control arrangement, and a vehicle.