Boost Circuit Rapid Shutdown for Lower-Cost Energy Storage
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Solution Overview
Problem
The existing rapid shutdown systems for energy storage devices, such as solar photovoltaic systems, require additional installations like DC breakers or control logic relays to implement a rapid shutdown function, increasing configuration costs.
Innovation Solution
Integrating a rapid shutdown element into the boost circuit of an energy storage device, utilizing a first switch element and a second switch element controlled by specific signals to manage the flow between the battery module, boost circuit, and output circuit, thereby eliminating the need for additional components like DC breakers or control logic relays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components like DC breakers or control logic relays are installed to implement rapid shutdown function, then safety reliability is improved, but device complexity and configuration cost increase
Solution Approach 1:
The patent merges the rapid shutdown function with the existing boost circuit by integrating a shutdown switch element into the circuit topology. This combination eliminates the need for separate DC breakers or control logic relays, achieving rapid shutdown capability while reducing device complexity and configuration cost.
Solution Approach 2:
The boost circuit is designed to perform multiple functions: normal power conversion operation and rapid shutdown operation. By making the circuit universal, the patent eliminates the need for dedicated shutdown components, thereby reducing device complexity while maintaining safety reliability.
2Reliability
If additional components like DC breakers or control logic relays are installed to implement rapid shutdown function, then safety reliability is improved, but configuration cost increases
Solution Approach 1:
The patent combines the rapid shutdown functionality with the existing boost circuit components, eliminating the need for additional expensive components like DC breakers or control logic relays. This merging approach reduces configuration cost while maintaining safety reliability.
Solution Approach 2:
The boost circuit is designed to serve dual purposes: normal power conversion and rapid shutdown. This multi-functionality eliminates the need for separate shutdown components, thereby reducing configuration cost while ensuring safety reliability.
Data Source
AI summary
A rapid shutdown system of an energy storage device includes a battery module, a boost circuit, a second switch element and an output circuit. The battery module has a first end and a second end. The boost circuit includes a first switch element and an active or passive switch element, wherein the first switch element is controlled by a first control signal to be conducted or non-conducted between the first end and the second end. The second switch element has a third end and a fourth end, wherein the third end is connected to the active or passive switch element. The output circuit has a fifth end and a sixth end, wherein an output voltage exists between the fifth end and the sixth end. The second switch element is controlled by a second control signal to be conducted or non-conducted between the boost circuit and the output circuit.