Integrated Busbar Module with Shunt Resistors

Solution Overview

Problem

The existing current measurement systems for secondary battery modules using multiple shunt resistors and busbars increase the volume and cost of battery modules, compromising their efficiency and energy density.

Innovation Solution

An integrated busbar module with multiple shunt resistors and measuring units that measure voltage values applied to each shunt resistor, allowing for reliable current calculation without the need for multiple busbar components, thereby reducing the volume and cost of the battery module.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple shunt resistors and busbars are used to measure voltage and current, then measurement reliability is improved, but volume and cost of the battery module increase

Engineering Contradiction:

Improvemeasurement reliabilityVSAvoidbattery module volume

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent combines multiple shunt resistors into a single integrated busbar structure. Instead of using separate busbars for each shunt resistor, the invention integrates them into one unified busbar module, reducing the overall volume while maintaining the functionality of multiple measurement points.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated busbar serves multiple functions simultaneously: it acts as both a current conductor and a measurement element for multiple shunt resistors. This multi-functional design eliminates the need for separate dedicated busbars for each measurement point, thereby reducing volume and component count.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple shunt resistors and busbars are used to measure voltage and current, then measurement reliability is improved, but cost of the battery module increases

Engineering Contradiction:

Improvemeasurement reliabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines multiple shunt resistors into a single integrated busbar structure. Instead of using separate busbars for each shunt resistor, the invention integrates them into one unified busbar module, reducing the overall volume while maintaining the functionality of multiple measurement points.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention eliminates redundant busbar components that would otherwise be needed for each shunt resistor. By discarding these unnecessary separate components and recovering the space and cost they would occupy, the overall manufacturing cost is reduced while maintaining measurement reliability.

Inventive Principle:

Principle #34Discarding and recovering

3Measurement precision

If multiple shunt resistors are used to obtain highly reliable measured values, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvevoltage measurement precisionVSAvoidbusbar structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple shunt resistors into a single integrated busbar structure. Instead of using separate busbars for each shunt resistor, the invention integrates them into one unified busbar module, reducing the overall volume while maintaining the functionality of multiple measurement points.

Inventive Principle:

Principle #5Merging (Combining)

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 approach enables a compact and cost-effective current measurement system that maintains high reliability in voltage and current measurement, improving the efficiency and energy density of secondary battery modules.

Implementation Method 1

a current of the battery module is calculated through the shunt resistor based on the measured voltage value

Methodology Applied

Scientific EffectOhm's Law: Ohm's Law

Data Source

PatentUS10802049B2Current measurement apparatus using shunt resistor

Publication Date: 2020.10.13 LG ENERGY SOLUTION LTD

AI summary

The present invention relates to a current measurement apparatus using a shunt resistor, and a current measurement apparatus using a shunt resistor, in which two or more busbar-type components, to which one shunt resistor is applied, in the related art are integrated into one busbar module, and a voltage of a battery module is measured through the plurality of shunt resistors included in the one integrated busbar module, thereby decreasing volumes and price of the battery module and a battery pack, and the plurality of shunt resistors is measured through the plurality of measuring units, respectively, thereby measuring a reliable voltage value.