Cascade Bus Module for Voltage-Matched Parallel Battery Packs
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Solution Overview
Problem
Conventional power tools with single battery packs have limited output power, which increases the technical difficulty and risk of product development, and can lead to premature discharge of low-voltage battery packs by high-voltage packs.
Innovation Solution
A bus module and cascade module system that allows multiple battery packs to be connected in parallel, with a control method to manage power distribution based on voltage levels, ensuring that battery packs of the same voltage are connected in parallel and that low-voltage packs are not discharged by high-voltage packs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single battery pack is used to supply power, then the device complexity is reduced, but the output power of the power tool is limited
Solution Approach 1:
The power supply system is segmented into multiple independent battery packs, each capable of operating autonomously. The bus module divides the power distribution into separate input branches, allowing each battery pack to be managed independently while contributing to the overall power output.
Solution Approach 2:
Multiple battery packs are merged in parallel through the bus module to achieve higher power output. The control unit coordinates the parallel connection of multiple power sources, combining their outputs while maintaining system management through integrated control.
2Power
If multiple battery packs are connected in parallel without voltage matching, then the power output is increased, but low-voltage battery packs are discharged by high-voltage packs reducing service life
Solution Approach 1:
The control unit continuously monitors the voltage of each battery pack through detection circuits and uses this feedback information to dynamically adjust the switching states. This feedback mechanism ensures that battery packs are connected in parallel only when their voltages are matched, preventing discharge imbalances and extending service life.
Solution Approach 2:
The system dynamically adjusts the parallel connection configuration based on real-time voltage conditions. The switching unit changes the connection state of each battery pack dynamically, transitioning between series and parallel configurations as voltage levels change during operation.
3Power
If the switching unit controls parallel connection of multiple battery packs, then the output power is increased, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The control unit performs multiple functions: it detects voltage levels, determines connection configurations, controls switching operations, and monitors system status. This multi-functional approach consolidates control complexity into a single integrated unit rather than requiring separate control mechanisms for each function.
Data Source
AI summary
The disclosure provides a bus module, a cascade module, and a bus module control method. The bus module includes an input unit, an output unit, a switching unit, and a control unit. The input unit includes at least one input branch which includes an input interface electrically connected to a peripheral power supply to obtain power output by the peripheral power source. The output unit is provided with an output branch, and the output branch is provided with an output interface to output power obtained by the input unit. One end of the switching unit is connected to the input unit, and the other end of the switching unit is connected to the output unit. And the control unit controls the switching unit to work to control the on-off between the input branch and the output branch.