Portable Tool Battery Storage Decoupling Weight and Power

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Solution Overview

Problem

Existing portable hand tools face challenges with heavy, high-performance batteries that are strenuous to handle and have limited working time, and generators produce noise and emissions, limiting flexible and efficient energy storage and release.

Innovation Solution

A device with a separate mobile transport and storage facility for lithium-ion batteries, incorporating an inverter for current inversion, allowing for flexible and efficient energy storage and release, decoupling the tool's weight from the user and providing modular, high-power, emission-free operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If high-performance batteries are integrated into portable hand tools to provide sufficient power, then the power output is improved, but the weight increases making them strenuous to handle

Engineering Contradiction:

Improvepower outputVSAvoidbattery weight

Core Design Contradiction:

PowerVSWeight of moving object

Solution Approach 1:

The battery system is divided into two separate components: a lightweight battery integrated into the hand tool for portability, and a separate heavy-duty base station with additional battery capacity for extended operation. This segmentation allows the user to carry only the lightweight tool while the base station provides supplemental power when available.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base station acts as an intermediary energy reservoir between the electrical grid and the portable hand tool. It stores energy and transfers it to the tool via wireless or wired connection, eliminating the need for the user to directly carry all the weight required for extended operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Weight of moving object

If smaller batteries are used in portable hand tools, then the weight is reduced improving handling, but the working time is limited

Engineering Contradiction:

Improvebattery weightVSAvoidworking time

Core Design Contradiction:

Weight of moving objectVSDuration of action of moving object

Solution Approach 1:

The total energy capacity is segmented between a small portable battery in the hand tool and a larger stationary battery in the base station. The tool battery provides immediate power for portability, while the base station battery extends total operating duration through periodic recharging of the tool battery.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base station pre-charges its battery in advance when electrical power is available, so that when the user needs extended operation, the energy is already stored and ready for transfer to the hand tool without requiring the user to wait for charging during field operation.

Inventive Principle:

Principle #10Preliminary action

3Duration of action of moving object

If generators are used to provide power for portable tools, then the working time is extended, but noise and exhaust emissions are produced

Engineering Contradiction:

Improveworking timeVSAvoidnoise and emissions

Core Design Contradiction:

Duration of action of moving objectVSObject-generated harmful factors

Solution Approach 1:

The internal combustion engine system (mechanical) is replaced with an electrochemical energy storage system (electrical). The base station uses electric batteries instead of gasoline engines to generate power, eliminating exhaust emissions and significantly reducing noise while providing extended operating duration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of operation

If the battery is integrated into the hand tool, then the power supply is direct, but the user bears the full weight burden

Engineering Contradiction:

Improvedirect power supplyVSAvoiduser burden

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

The power supply system is segmented into a lightweight battery compartment integrated into the hand tool for direct power connection, and a separate heavy base station containing the majority of the total battery weight. This maintains direct power supply capability while removing most weight burden from the user.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The heavy-duty battery capacity is extracted from the hand tool and placed in the base station. Only the essential lightweight battery and power management electronics remain in the tool, extracting the weight burden from the user while preserving direct power supply functionality through wireless or wired connection to the base station.

Inventive Principle:

Principle #2Taking out (Extraction)

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 improved handling and extended power supply for portable tools, avoiding ergonomic burdens and emissions, with flexible energy storage and output configurations suitable for various applications.

Implementation Method 1

a means for inverting the current from the means for absorbing and/or releasing energy, in particular an accumulator

Methodology Applied

Scientific EffectElectrical inversion:

Data Source

PatentEP3379594B1Apparatus for storage and/or output of energy

Publication Date: 2020.12.23 ZSKG ZWEISTROMKREISGENERATOR GMBH

Figure 1a~1b
Figure 2a~4b

AI summary

Device for storing and/or releasing energy, which is rechargeable multiple times, for use on a user-portable, electrically operated work device, in particular a portable, electrically operated hand tool and/or work device, in particular for hammering and/or sawing and/or grinding and/or screwing and/or drilling and/or cutting, in particular a chainsaw and/or a hedge trimmer, in particular a drill and/or a rotary hammer.