Y-Connected Battery Strings for Three-Phase AC Power Output

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing power supply systems using battery strings primarily output direct current power, limiting their applications and increasing costs, while there is a need for systems that can efficiently output alternating current power.

Innovation Solution

A power supply system that includes an alternating current sweep unit and a first power supply circuit, utilizing Y-connected U-phase, V-phase, and W-phase battery strings with inverter conversion to output alternating current power, and employing insulating filters to reduce noise and optimize waveform quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a power supply system uses a battery string to output direct current power, then the system structure is simple and cost is reduced, but the range of applications is limited and cannot output alternating current power

Engineering Contradiction:

Improverange of applicationsVSAvoidsystem structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The battery string system is designed to perform multiple functions: it can output both direct current power (through the direct current sweep unit) and alternating current power (through the alternating current sweep unit with Y-connected battery strings). This multi-functionality allows the same battery string to serve diverse application needs without requiring separate systems for each power type.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The alternating current sweep unit acts as an intermediary component that enables the battery string to output alternating current power. By introducing this intermediate device with Y-connected battery strings and insulating filters, the system can convert the inherent direct current output into alternating current, thereby expanding application range while maintaining the simplicity of the core battery string structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If a power supply system outputs alternating current power using an inverter, then alternating current power can be obtained, but the circuit capacity increases and cost rises

Engineering Contradiction:

Improvealternating current output capabilityVSAvoidcircuit capacity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The power supply system is divided into two independent sweep units: a direct current sweep unit and an alternating current sweep unit. Each unit handles a specific power type, allowing the system to provide alternating current capability without requiring the entire system to be designed for high circuit capacity. The alternating current sweep unit with Y-connected battery strings handles AC output specifically, keeping the overall circuit capacity requirements manageable.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the connection configuration parameter of the battery strings by using Y-connection in the alternating current sweep unit, which enables alternating current output with reduced circuit capacity requirements compared to traditional inverter-based systems. This parameter change allows efficient alternating current power output while controlling system complexity.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If insulating filters are used to reduce noise and optimize waveform quality, then sinusoidal waveform quality is maintained, but the device complexity increases

Engineering Contradiction:

Improvewaveform qualityVSAvoidfilter structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Insulating filters are introduced as intermediary components in the alternating current sweep unit to reduce noise and optimize waveform quality. These filters act as mediators between the Y-connected battery strings and the output, ensuring high-quality sinusoidal waveforms while isolating the complexity of the filtering function from the core battery string structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enables the expansion of battery string applications by outputting alternating current power efficiently, reducing costs through the use of high-output density batteries and energy-efficient inverter technology, while maintaining sinusoidal waveform quality and flexibility in power adjustment.

Implementation Method 1

converting direct current power output from the first battery string into alternating current power using the inverter

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The alternating current power output from the first power supply circuit is noise-removed (reduced) by the first insulating filter and then supplied to the external power supply. The alternating current power output from the alternating current sweep unit is noise-removed (reduced) by the second insulating filter

Methodology Applied

Scientific EffectElectromagnetic filtering: Filter (electronic)

Data Source

PatentUS11949261B2Power supply system

Publication Date: 2024.04.02 TOYOTA JIDOSHA KK

AI summary

A power supply system includes an alternating current sweep unit and a first power supply circuit, and each of a U-phase battery string, a V-phase battery string, a W-phase battery string, and a first battery string includes a plurality of battery circuit modules connected in series, and each of the battery circuit modules includes a battery, output terminals, a first switch, and a second switch.