Configurable Switch Sets in Power Control Units for Safe High-Density Power
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Solution Overview
Problem
Existing power supply units in electrical devices face challenges in optimizing safety and reliability while maintaining efficiency, particularly in contexts like aerosol provision systems where high-power-density power control units are required.
Innovation Solution
A switching unit with independently controllable switches arranged in configurable switch sets, allowing for parallel or series configurations to manage electrical current paths, enhancing reliability and safety while maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple switches are used in series to improve reliability and safety, then the complexity of the switching unit increases
Solution Approach 1:
The switching unit is divided into multiple independently controllable switches (first switch, second switch, third switch) arranged in series between the power supply terminal and load terminal. Each switch can be independently controlled to open or close the circuit path, allowing the system to maintain reliability through multiple switching elements while managing complexity through modular independent control.
Solution Approach 2:
The switching unit employs dynamic control logic that can adaptively adjust the state of each switch based on real-time operating conditions. The control logic is configured to independently trigger each switch to transition between open-circuit and closed-circuit states, enabling flexible power distribution and load management that optimizes reliability without requiring fixed complex wiring arrangements.
2Reliability
If switches are independently controlled to improve safety and reliability, then the control logic complexity increases
Solution Approach 1:
The control logic is designed as a universal multi-functional unit that can independently manage multiple switches (first, second, and third switches) through a standardized control interface. The control logic is configured to independently trigger each switch to transition between states, providing safety and reliability through centralized intelligent control rather than distributed complex wiring, thereby reducing overall system complexity while maintaining independent switch control capabilities.
3Power
If high-power-density power control is implemented, then the risk of safety issues and failures increases
Solution Approach 1:
The high-power control function is segmented across multiple switches (first switch for main power path, second and third switches for additional control paths) rather than relying on a single high-power switch. This segmentation distributes the power handling burden and creates redundant safety paths, allowing high power density operation while mitigating safety risks through distributed switching architecture.
Solution Approach 2:
The switching unit incorporates protective switching arrangements where the control logic can preemptively open circuit paths through the first, second, and third switches in response to detected abnormal conditions. This prior cushioning approach prepares safety mechanisms in advance, allowing the system to handle high power density while having pre-configured safety paths to prevent or mitigate failures before they occur.
Data Source
AI summary
A switching unit for a power control unit is disclosed, comprising at least one power supply node for connection to a power supply, at least one load node for connection to a load, an electrical current path configured to connect the at least one power supply node to the at least one load node, and a plurality of switches disposed on the electrical current path. Each switch is configured to be independently connected to a controller implementing control logic configured to independently trigger each of the switches to transition between an open-circuit state and a closed-circuit state to modify the continuity of the current path. The plurality of switches are arranged into at least one configurable switch set, each configurable switch set comprising at least two of the plurality of switches, wherein the switches comprised in each configurable switch set are configured to be set into either of a parallel configuration or a series configuration with respect to the electrical current path. A circuit package comprising the switching unit is also disclosed, together with a method of operating a switching unit for a power control unit. In some embodiments, the circuit package is included in an aerosol provision device.