Individual Module Dynamic Switching for Battery Voltage Conversion
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Solution Overview
Problem
Conventional battery systems require complex supply circuits and suffer from high losses and distortions when converting DC voltage to AC voltage, especially at low speeds, and simultaneous switching of modules is necessary, which is challenging and costly.
Innovation Solution
An individual module with at least five internal switching elements and two terminals, allowing for asynchronous operation and dynamic switching between parallel and series connections, reducing the need for simultaneous switching and enabling the use of low-voltage semiconductor components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional power converters are used to convert DC voltage to AC voltage, then AC voltage can be provided to loads, but high losses and high distortions occur especially at low speeds
Solution Approach 1:
The battery system is divided into multiple individual modules, each capable of independent operation. Each module contains switching elements that can dynamically reconfigure the battery parts between series and parallel connections, enabling granular control over voltage output and reducing conversion losses while maintaining output quality.
Solution Approach 2:
The patent implements dynamic switching of battery connections between series and parallel configurations using switching elements within each module. This dynamic reconfiguration allows the system to adapt to varying load requirements, maintaining optimal voltage levels and minimizing losses across different operating conditions, particularly at low speeds.
2Power
If modules are connected in series to increase voltage, then higher voltage is available, but simultaneous switching of all modules is necessary which is challenging and costly
Solution Approach 1:
The system is segmented into independent modules that can operate autonomously. Each module contains its own switching elements and can be configured independently, eliminating the need for complex simultaneous switching coordination across all modules while still achieving high voltage through series connection capability.
Solution Approach 2:
Multiple battery parts within each module are merged through dynamic switching between series and parallel connections. This allows the system to achieve high voltage when needed while maintaining operational independence of each module, avoiding the synchronization complexity of traditional series-connected systems.
3Loss of energy
If battery parts are connected in parallel to reduce voltage, then lower voltage is available, but effective internal resistance decreases reducing losses
Solution Approach 1:
The switching elements dynamically reconfigure battery parts between series and parallel connections based on load requirements. This dynamic adjustment optimizes the balance between voltage level and internal resistance, achieving low resistive losses through parallel connection when appropriate while maintaining sufficient voltage for load operation.
4Device complexity
If conventional hardwired battery connections are used, then结构简单 (simple structure), but complex supply circuits are required at loads to handle voltage variations
Solution Approach 1:
The battery system incorporates dynamic switching capability directly at the module level, allowing automatic adaptation to voltage variations. This eliminates the need for complex supply circuits at loads because the battery system itself actively maintains appropriate voltage levels through real-time reconfiguration of series/parallel connections.
Data Source
AI summary
A module for connecting to a second module of the same type to provide an electrical converter system or, a battery system, wherein the module comprises an energy storage, at least five internal switching elements, and at least two connections on each side of the module, wherein the energy storage is connected directly to at least one of the at least two connections and the internal switching elements are arranged and connected in such a way that the internal switching elements, independently of a switching state of corresponding internal switching elements of the second module of the same type, can realize all switching states in order to dynamically switch an electrical connection between the energy storage and a corresponding energy storage of the second module. The invention further relates to an electrical converter system and to a battery system.