External Battery Charger Plate for Portable Power Tool Packs

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Solution Overview

Problem

Users face challenges in efficiently charging battery packs for power tools at work sites due to limited and unreliable charging power sources, leading to faster discharge than charging, especially when carrying storage cases with auxiliary devices.

Innovation Solution

A battery pack charger system with a case that includes a housing and a charging system with multiple chargers mounted externally, allowing for simultaneous charging of multiple battery packs without opening the case, using a single electrical cord and a partition to organize charged and used packs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple chargers are mounted externally on the case, then multiple battery packs can be charged simultaneously, but the device complexity increases

Engineering Contradiction:
Improvecharging speedVSAvoidcharger system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

Multiple chargers are integrated onto a single plate member that is coupled to the case, combining multiple charging functions into one unified structure. This allows simultaneous charging of multiple battery packs while maintaining a consolidated, manageable system rather than separate charger units.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The plate member serves multiple functions: it mounts the chargers, provides structural support, and can be coupled to the case in a standardized manner. This multi-functional design reduces overall system complexity by eliminating the need for separate mounting structures for each charger.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Productivity

If the charging system is located inside the case, then the case size increases, but portability is maintained

Engineering Contradiction:
Improvecharging capabilityVSAvoidcase volume
Core Design Contradiction:
ProductivityVSVolume of moving object

Solution Approach 1:

The charging system is extracted from the interior of the case and mounted externally on the outside surface. This extraction allows the case interior to remain dedicated for storing battery packs and tools, while the charging function is added externally without increasing the case's internal volume or compromising portability.

Inventive Principle:
Principle #2Taking out (Extraction)

3Ease of operation

If the case is designed to be compact for transport, then access to charging power sources is limited, but charging efficiency improves

Engineering Contradiction:
Improvetransport convenienceVSAvoidcharging availability
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The externally mounted chargers can operate independently once powered, allowing the case to serve itself for charging multiple battery packs simultaneously without requiring the user to manually connect each pack to a separate power source. The compact case design is maintained while charging availability is improved through the external multi-charger configuration.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS10651664B2Portable battery charger system
Publication Date: 2020.05.12 BLACK & DECKER CORP
  • US10651664B2 patent drawing
  • US10651664B2 patent drawing
  • US10651664B2 patent drawing

AI summary

A battery pack charger system including a case configured to store and transport a plurality of battery packs, and a charging system coupled to an outside of the case. The case may include a housing and a lid. The charging system may include a plate member and a plurality of chargers. The plurality of chargers may be arranged in parallel with respect to each other on the plate member.