DC energy storage system with modular storage and control units, flexible combination of modules, central monitoring, hot-swappable safe charging and discharging processes, compatible with various energy sources

Abstract

Direct current storage system for receiving, storing and supplying electrical energy on demand, characterized by at least one battery module for direct storage of direct current and an output unit which provides the stored current directly without continuous conversion to alternating current.

Description

Description of the invention:

[0001] The present invention relates to an energy storage system for self-generated energy from photovoltaic systems or comparable direct current sources. The system enables the direct storage of the generated direct current without the need for constant conversion to alternating current. The aim is an efficient, mobile, and directly usable power supply, for example, via standard household sockets, without connection to the public power grid.

[0002] The storage system has a modular design, includes internal fuses and residual current circuit breakers, and allows automatic switching between multiple storage modules. It can be used in stationary or mobile applications. Advantages of the invention: 1. Minimization of energy losses through one-time conversion of direct current to alternating current when required. 2. Protection against external attacks, especially by network operators, thanks to complete network independence. 3. Fire protection compliant design with integrated fuses, circuit breakers, overcurrent and short circuit protection. 4. Mobile applications, e.g. as camping power storage, emergency power supply or construction site power source. 5. Easy integration into existing residential buildings without interfering with the house installation.

Claims

[1] Direct current storage system for receiving, storing and releasing electrical energy on demand, characterized by at least one battery module for direct storage of direct current and an output unit that provides the stored current directly without continuous conversion to alternating current. [2] DC storage system according to claim 1, as a modular system with at least two, preferably three or more sufficient storage modules and automatic switching device when a module is discharged. [3] DC storage system according to one of the preceding claims, with integrated safety devices including residual current circuit breakers, overcurrent protection and short-circuit protection. [4] Direct current storage system according to one of the preceding claims, with external feed-in of the stored current via commercially available sockets without connection to the public power grid. [5] DC energy storage system according to any of the preceding claims, configured for mobile use in living spaces, on balconies or similar locations, without roof access. [6] Direct current storage system according to one of the preceding claims, with physical and electrical protective measures against unauthorized access. [7] Direct current storage system according to one of the preceding claims, wherein the conversion of direct current to alternating current is carried out once as required, internally or externally. [8] DC storage system according to one of the preceding claims, with modular storage arrangement, electrical termination devices, safety devices and mechanical switching mechanisms. [9] DC storage system according to one of the preceding claims, configured for use in a motor vehicle, wherein the stored DC current can be used to supply the electric drive system or other on-board consumers and / or the charging of the storage modules is carried out via vehicle-internal DC sources or external charging devices. [10] DC energy storage system according to one of the preceding claims, comprising electrical access control via starter chip card, chip card reader or mobile application (app) to enable operation or energy output only for authorized users. [11] Direct current storage device according to one of the preceding claims, characterized by that the modules can be connected to each other via a standardized connector (e.g. pins or chips), thus enabling flexible expansion. [12] DC storage device according to claim 11, characterized bythat the plug connections are tool-free, so that assembly can be carried out by the end user without specialist knowledge. [13] Direct current storage device according to one of the preceding claims, characterized by that a modular design is planned, which allows for rapid assembly and pre-assembly in production, thereby significantly reducing the final assembly time. [14] DC storage device according to one of the preceding claims, characterized by , that modular expansion is made possible by simply adding storage modules, with the control electronics automatically recognizing and integrating the new modules. [15] DC energy storage system according to any of the preceding claims, characterized by that the storage system is designed to be delivered in a modular system, similar to a prefabricated kit, with final assembly taking place at the customer's site. [16] Direct current storage system according to one of the preceding claims, characterized by that the kit is designed so that it can be used without interfering with the electrical installation and complies with applicable safety regulations. [17] Direct current storage system according to any one of the preceding claims, characterized by that the modular units are designed for both direct current and alternating current applications. [18] Direct current storage system according to one of the preceding claims, characterized by that the modules are equipped with standardized interfaces to facilitate future expansions or modifications. [19] Direct current storage system according to any one of the preceding claims, characterized by that the design enables a significant reduction in manufacturing costs, particularly through simplified final assembly and reduced testing efforts. [20] Direct current storage system according to any one of the preceding claims, characterized by that the design allows for retrofitting into existing systems without much effort. [21] Direct current storage system according to one of the preceding claims , characterized by that the battery module is based on a storage chemistry independent of lithium, in particular on sodium-ion, zinc-based or solid-state storage systems, thereby enabling a cost-effective and sustainable implementation of the modular storage system.