DC-DC Converter Sleep Control for Low-Battery Sensing Load

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Solution Overview

Problem

In solar power-linked energy storage systems, batteries experience unnecessary power consumption due to continuous sensing, especially when the remaining battery capacity is low, leading to inefficiencies and potential over-discharge.

Innovation Solution

A DC-DC converter with a sensing circuit and processor that determines operational modes based on battery state, including sleep and shutdown modes, to reduce power consumption by deactivating non-essential functions and disconnecting the battery when capacity falls below certain thresholds, ensuring minimal power usage during low charge conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If continuous sensing is performed to monitor battery state, then battery state monitoring reliability is improved, but unnecessary power consumption increases

Engineering Contradiction:

Improvebattery state monitoring reliabilityVSAvoidbattery power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The sensing switch is controlled to operate periodically rather than continuously. The processor determines whether to activate the sensing switch based on battery remaining capacity thresholds, creating periodic sensing intervals that reduce power consumption while maintaining necessary monitoring reliability

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The sensing system transitions from a static continuous operation mode to a dynamic mode where the sensing switch is selectively activated or deactivated based on real-time battery state assessment, optimizing the balance between monitoring reliability and power consumption

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If sensing switch is continuously activated to monitor battery, then measurement precision is improved, but power consumption increases

Engineering Contradiction:

Improvebattery state measurement precisionVSAvoidbattery power consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The sensing switch is activated periodically based on battery state conditions rather than continuously. When the battery remaining capacity falls below predetermined thresholds, the sensing switch is activated to perform measurements, and deactivated when thresholds are not met, achieving precise measurement only when necessary

Inventive Principle:

Principle #19Periodic action

3Reliability

If battery sensing is performed at all times, then system reliability is improved, but unnecessary power consumption occurs

Engineering Contradiction:

Improvesystem reliabilityVSAvoidunnecessary power consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system implements periodic sensing based on battery remaining capacity thresholds. The processor evaluates battery state and activates the sensing switch only when predetermined conditions are met, eliminating unnecessary continuous sensing operations that would consume power without adding value to system reliability

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system monitors its own battery state and autonomously determines when sensing operations are necessary. The processor evaluates remaining capacity and self-regulates the sensing switch activation, making the system self-aware of its power needs and adjusting monitoring intensity accordingly

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11962232B2DC-dC converter for solar power-linked energy storage system, and control method therefor

Publication Date: 2024.04.16 LG INNOTEK CO LTD

AI summary

According to one embodiment, disclosed are a DC-DC converter for preventing the unnecessary consumption of a battery in a solar power-linked energy storage system, and a control method thereof. Particularly, a sensing switch is controlled according to a current mode, and thus unnecessary power consumption can be prevented. In addition, a method for operating a circuit breaker, related thereto, is disclosed.