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
Engineering 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
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.
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.
2Productivity
If the charging system is located inside the case, then the case size increases, but portability is maintained
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.
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
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.
Data Source
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.


