Modular Battery System With DC/DC Converters For Decentralized Energy Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current technologies lack suitable concepts for decentralized storage of electrical energy, particularly in stationary applications like wind turbines and emergency power systems, which hinders efficient energy management and grid relief during peak load times.
Innovation Solution
A modular battery system with DC/DC converters connects battery modules to a DC link, allowing for flexible design, increased reliability, and adaptive operation, enabling decentralized energy storage and management by optimizing the use of battery cells based on their aging status and state of charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If battery cells are directly coupled to the DC voltage intermediate circuit, then the system structure is simpler, but the system lacks flexibility, reliability, and maintainability
Solution Approach 1:
The battery system is divided into multiple independent battery modules, each with its own DC/DC converter. This segmentation allows individual modules to be managed separately, enabling flexible configuration, easier maintenance, and continued operation of remaining modules when one is replaced, thus resolving the contradiction between structural simplicity and system flexibility
2Device complexity
If battery cells are directly coupled to the DC voltage intermediate circuit, then the system is simpler to implement, but the failure of individual cells leads to failure of the entire system
Solution Approach 1:
By segmenting the battery system into independent modules with individual DC/DC converters, the patent ensures that failure of one module does not propagate to other modules. Each module operates independently, so the system can continue functioning with reduced capacity rather than complete failure, thus improving reliability while maintaining reasonable structural complexity
Solution Approach 2:
The system design anticipates potential failures by creating redundant modular structures. When a battery module fails, the system is already configured to operate with the remaining modules, providing a cushion against total system failure and maintaining reliability
3Quantity of substance
If battery modules operate at high voltage, then energy storage capacity is increased, but safety risks and maintenance difficulty increase
Solution Approach 1:
The total energy storage capacity is divided across multiple battery modules operating at lower individual voltages. Each module contains fewer cells in series, reducing the voltage per module to safer levels while maintaining overall system capacity through parallel or series configuration of multiple low-voltage modules, thus resolving the contradiction between energy capacity and safety
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The modular design enhances flexibility, reliability, and maintainability, allowing for efficient energy storage and distribution, optimizing battery performance and extending system life while reducing maintenance risks and costs.
Implementation Method 1
a converter which is connected between the DC voltage intermediate circuit and a connection to an energy supply network and is designed to generate an AC voltage to convert in the energy supply network into a DC voltage and to output it to the DC voltage intermediate circuit, and to convert a DC voltage in the DC voltage intermediate circuit into an AC voltage and to output it to the energy supply network
Implementation Method 2
the battery modules each have a DC/DC converter, via which they are connected to the DC link
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a battery system, comprising a plurality of battery modules, each having one or more battery cells, a direct voltage intermediate circuit having a first pole and a second pole, and a converter connected between the direct voltage intermediate circuit and a connection for an energy supplier network, said converter being designed to convert an alternating voltage of the energy supplier network into a direct voltage and to output it to the direct voltage intermediate circuit, and to convert a direct voltage of the direct voltage intermediate circuit into an alternating voltage and to output it to the energy supplier network. Each battery module has a DC/DC converter and the modules are connected to the direct voltage intermediate circuit by means of the respective DC/DC converter.