Series Battery Pack Circuitry for Missing-Pack Tool Operation
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Solution Overview
Problem
Existing battery-powered portable power tools face challenges in efficiently managing and utilizing multiple series-type connected battery packs, particularly in scenarios where not all battery packs are present or operational.
Innovation Solution
The design incorporates a first and second battery pack receptacle, with circuitry including an electronic processor that allows for the alteration of signals between the battery packs and the processor, and includes bypass circuitry to accommodate scenarios where not all battery packs are present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple series-type connected battery packs are used to increase power output, then the power and duration of action are improved, but the device complexity and difficulty of operation increase when not all battery packs are present
Solution Approach 1:
A adapter serves as an intermediary device that interfaces between the tool's battery receptacle and multiple series-connected battery packs. The adapter contains circuitry that automatically manages the series connection of multiple battery packs, allowing the tool to operate with 1, 2, or more battery packs without requiring complex manual configuration or switching by the user.
Solution Approach 2:
The circuitry within the adapter automatically detects the presence and configuration of battery packs and self-configures the electrical connections accordingly. The system performs automatic voltage detection, connection routing, and safety checks without user intervention, enabling the battery system to manage its own complexity internally while presenting a simple interface to the user.
2Duration of action of moving object
If multiple series-type connected battery packs are used to extend operational duration, then the duration of action is improved, but the ease of operation deteriorates due to complex connection requirements
Solution Approach 1:
The adapter is designed with universal functionality to accommodate various battery pack configurations (single pack, two packs in series, or more). The same adapter interface and attachment mechanism work regardless of how many battery packs are connected, eliminating the need for different adapters or complex connection procedures for different operational durations.
Solution Approach 2:
The adapter mediates between the user's simple action of attaching battery packs and the complex electrical requirements of the tool. By providing a standardized interface and automatic internal configuration, the adapter allows users to extend operational duration simply by adding more battery packs without needing to understand or manage the underlying electrical complexity.
3Power
If series-type connected battery packs are used to increase power output, then the power is improved, but the reliability decreases when battery packs may be absent or malfunctioning
Solution Approach 1:
The circuitry includes protective measures that are预先 built-in to cushion against potential failures. Over-current protection, over-voltage detection, and short-circuit prevention circuits are integrated to detect and respond to abnormal conditions before they can cause damage or failure, ensuring reliable operation even when battery packs are pushed to their limits for high power output.
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor the electrical parameters of the battery packs and tool operation. The circuitry detects voltage levels, current flow, and connection integrity, and automatically adjusts or disconnects battery packs that show signs of malfunction or incompatibility, preventing system failure and maintaining reliability during high-power operation.
Data Source
AI summary
An electrical device including a first battery pack receptacle, a second battery pack receptacle, and circuitry including an electronic processor. The first battery pack receptacle is configured to receive a first battery pack. The second battery pack receptacle is configured to receive a second battery pack. The second battery pack is electrically connected in a series-type configuration with the first battery pack. The circuitry is configured to alter a first signal output from the electronic processor to at least one selected from a group consisting of the first battery pack and the second battery pack, and alter a second signal received by the electronic processor from at least one selected from the group consisting of the first battery pack and the second battery pack.