Driver Module Energy Supply for Battery Series Circuits
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Solution Overview
Problem
In energy storage systems, particularly in battery direct inverters and converters, the interruption of the series circuit during charging can cause signal and power electronics to lose current supply, leading to shutdowns, which is problematic and requires additional external redundant energy sources, increasing costs and complexity.
Innovation Solution
The energy storage module incorporates a driver module with dual energy supply connections and voltage tap points within the series circuit, allowing for continued energy supply to the driver module even if a malfunction occurs, eliminating the need for external redundant energy sources by utilizing internal energy storage cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driver module is supplied with current from the series circuit of battery cells, then the system complexity is reduced and external redundant energy sources are eliminated, but an interruption in the series circuit during charging causes the driver module to lose current supply and shut down
Solution Approach 1:
The series circuit of battery cells is segmented into multiple parallel branches, allowing current to flow through alternative paths if one branch is interrupted. This segmentation enables the driver module to maintain operation even when part of the series circuit fails, resolving the contradiction between simplified system design and operational reliability.
Solution Approach 2:
The circuit topology is changed from a single series path to a configuration with parallel branches containing series-connected battery cells. This parameter change in circuit architecture allows the system to maintain current supply to the driver module under fault conditions, achieving both low complexity and high reliability.
2Reliability
If external redundant energy sources are added to ensure continuous supply to signal and power electronics, then the reliability is improved, but the implementation cost and effort increase
Solution Approach 1:
The energy storage system itself provides the redundant energy supply function through its internal parallel circuit branches, eliminating the need for separate external redundant energy sources. The system serves its own reliability needs using existing components, achieving high reliability without additional implementation complexity.
Solution Approach 2:
The parallel branches of battery cells serve dual functions: they provide the primary energy supply during normal operation and simultaneously serve as the redundant energy source during fault conditions. This multi-functionality eliminates the need for dedicated redundant energy sources, reducing implementation complexity while maintaining reliability.
Data Source
AI summary
The invention relates to an energy storage module for an energy storage device, comprising an energy storage cell module which has a storage cell series circuit of at least two energy storage cells, comprising a coupling device, which comprises a plurality of coupling elements and is designed to selectively connect the energy storage cell module into an energy supply line of the energy storage device or to bypass the energy storage cell module in an energy supply line, and comprising a driver module which is designed to generate drive signals for the plurality of coupling elements. The driver module has a first energy supply connection and a second energy supply connection. The first energy supply connection is connected to a first end connection of the energy storage cell module via a first supply line and to a first node point between two energy storage cells of the storage cell series circuit via a second supply line. The second energy supply connection is connected to a second end connection of the energy storage cell module via a third supply line and to a second node point between two energy storage cells of the storage cell series circuit via a fourth supply line. The second node point lies between the first node point and the first end connection.