Dual-Voltage Battery Interface With Switchable Motor Winding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical apparatuses are limited in compatibility, as a conventional 18V battery pack cannot be physically mounted to a 36V electrical apparatus main body, and battery packs with non-changeable output voltage cannot be used efficiently across different voltage systems, hindering convenience and workability.
Innovation Solution
An electrical apparatus is designed to be connectable to both high-voltage and low-voltage battery packs, featuring a voltage switching part that adjusts voltage supply and motor coil connections based on the connected battery pack, allowing for efficient operation across different voltage systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a 36V electrical apparatus main body is designed with a specific terminal shape for high-voltage battery packs, then high-voltage operation is achieved, but low-voltage battery packs cannot be physically mounted
Solution Approach 1:
The terminal part is designed with a universal structure that can physically accommodate both 18V and 36V battery packs through a single terminal shape. The terminal includes multiple connection points that can establish different circuit configurations depending on which battery pack is mounted, enabling the same physical interface to serve multiple voltage requirements
2Adaptability or versatility
If a voltage switching part is added to enable both 18V and 36V operation, then battery pack compatibility is improved, but device complexity increases
Solution Approach 1:
The voltage switching function is merged with the terminal connection structure itself. The terminal part incorporates switching elements that automatically configure the circuit based on the detected battery pack type, eliminating the need for separate external switching mechanisms and reducing overall device complexity
Solution Approach 2:
The terminal part automatically detects the type of battery pack mounted and self-configures the appropriate voltage switching state without requiring external control signals or complex sensing circuits. The switching action is triggered inherently by the physical connection of the battery pack terminals
3Power
If motor coils are connected in a first connection configuration for high-voltage operation, then high-voltage efficiency is improved, but low-voltage operation requires different connection configuration
Solution Approach 1:
The motor coil connection configuration is made dynamic and switchable between different states (first connection configuration for high-voltage, second connection configuration for low-voltage). The switching is automatically performed based on the detected battery pack voltage, allowing the motor to operate efficiently at both voltage levels without requiring separate motor designs
Data Source
AI summary
A 36V electrical apparatus is mountable with both an 18V/36V switchable battery pack and an 18V battery pack. In the case where the 18V/36 V battery pack is connected to the 36V electrical apparatus, first switches are turned off and a second switch is turned on to connect the battery pack in series (36V output). In the case where the 18V battery pack is connected to the 36V electrical apparatus, the first switches are turned on and the second switch is turned off to generate an 18V output, thus making it possible to mount the 18V battery pack to the 36V electrical apparatus. Furthermore, the voltage of the mounted battery pack is determined by a microcomputer, and a motor is set to a star connection by switches in the case of 36V, and to a delta connection in the case of 18V.