Wireless Battery Measurement Device Using Magnetic Field Coupling

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Solution Overview

Problem

Existing battery management systems for electric vehicles face challenges in reducing device size while maintaining effective voltage measurement and monitoring of high-voltage battery cells without increasing power consumption, often requiring bulky high-voltage components for signal conversion.

Innovation Solution

A battery measurement device and monitoring system that wirelessly transmits measurement information using magnetic field coupling, eliminating the need for high-voltage cables and components like semiconductor elements and isolation transformers, and utilizing a power source circuit to generate necessary voltages within the device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If high-voltage cables and high-voltage semiconductor elements are used to transmit and convert high potential, then voltage measurement and monitoring can be achieved, but the overall device size increases

Engineering Contradiction:

Improvevoltage measurement capabilityVSAvoiddevice size

Core Design Contradiction:

Measurement precisionVSVolume of stationary object

Solution Approach 1:

The patent replaces physical high-voltage cable connections with wireless electromagnetic field communication. The measurement circuit wirelessly transmits voltage measurement data through electromagnetic fields, eliminating the need for physical high-voltage cables and associated isolation components, thereby significantly reducing device size while maintaining measurement capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an electromagnetic field as an intermediary medium to transmit measurement information between the battery and measurement circuit. This intermediary enables non-contact information transfer, replacing direct high-voltage electrical connections with field-based communication, thus eliminating bulky high-voltage isolation components

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If high-voltage cables and isolation transformers are used for voltage conversion, then high potential can be converted to signal level, but the overall device size increases

Engineering Contradiction:

Improvevoltage signal conversionVSAvoiddevice size

Core Design Contradiction:

Measurement precisionVSVolume of stationary object

Solution Approach 1:

The patent replaces traditional high-voltage isolation transformers and semiconductor elements with a wireless electromagnetic field-based measurement system. The measurement circuit directly measures high-voltage parameters and wirelessly transmits data, eliminating the need for bulky voltage conversion hardware while maintaining signal integrity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts and removes the high-voltage isolation and conversion components (cables, transformers, semiconductor elements) from the system by implementing direct wireless measurement. This extraction eliminates unnecessary intermediate components while preserving the essential measurement function

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If high-voltage semiconductor elements and isolation transformers are used, then voltage conversion can be achieved, but power consumption increases

Engineering Contradiction:

Improvevoltage signal conversionVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by stationary object

Solution Approach 1:

The patent replaces active high-voltage semiconductor conversion elements with a passive wireless electromagnetic field transmission system. This substitution eliminates the power-hungry active conversion components while maintaining measurement functionality through field-based data transmission

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The measurement system utilizes the battery's existing electromagnetic field environment to transmit measurement data wirelessly without requiring additional active power conversion stages. The system leverages natural electromagnetic phenomena to achieve measurement and communication with minimal power consumption

Inventive Principle:

Principle #25Self-service

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 solution reduces the overall size of the device and maintains effective voltage monitoring and communication without increasing power consumption, enabling efficient management of high-voltage battery cells in electric vehicles.

Implementation Method 1

A battery measurement device and monitoring system that wirelessly transmits measurement information using magnetic field coupling

Methodology Applied

Scientific EffectMagnetic field coupling: Electromagnetic Induction

Data Source

PatentUS11061074B2Battery measurement device and battery monitoring system

Publication Date: 2021.07.13 LAPIS SEMICON CO LTD

AI summary

A battery measurement device has an input terminal that receives a voltage of a secondary battery, a measurement circuit that measures a voltage value of a voltage received by the input terminal and generates a measurement information signal representing measurement results, a transmission unit that wirelessly transmits the measurement information signal, and a power source circuit that generates a power source voltage having a prescribed voltage value on the basis of the voltage of the input terminal, and supplies the power source voltage to the measurement circuit and the transmission unit.