Device and drive arrangement for supplying voltage with group converters connected in series

Abstract

The invention relates to a device (2) for supplying a voltage with a battery system (10) for supplying a battery system voltage (US), wherein the battery system (10) comprises at least two battery cells connected in series A module (13), wherein a battery submodule voltage (UM) is applied to each of the battery submodules (13), and having at least two transformer modules (20) electrically connected to the battery system (10), wherein , a sub-voltage (UT) of the battery system voltage (US) is applied to each of the transformer modules (20), and the sub-voltage (UT) of the battery system voltage can be connected to the corresponding transformer module (20) by using the sub-voltage (UT) of the battery system voltage. ), and wherein each one of the transformer modules (20) is electrically connected to one of the battery sub-modules (13) such that on each of the transformer modules (20) is applied an Battery sub-module voltage (UM) divided by voltage (UT).

Description

technical field [0001] The invention relates to a device for supplying a voltage with a battery system for supplying a battery system voltage, wherein the battery system comprises at least two battery submodules connected in series, wherein on each of the battery submodules The battery sub-module voltage is applied, and there are at least two transformer modules electrically connected to the battery system, wherein a partial voltage of the battery system voltage is applied to each of the transformer modules, and the battery system voltage can be Power is supplied by consumers connected to the corresponding transformer modules. The invention also relates to a drive arrangement. Background technique [0002] The device for supplying voltage usually includes an electrical energy store, which can be designed, for example, as a battery system. Such battery systems can be used to supply energy to consumers such as electric motors. Such an electric machine can be arranged, for e...

AI Technical Summary

Problems solved by technology

Therefore, high battery system voltages require a large number of series-connected battery modules or cells, and thus complicate optimal design of the battery, which can result in oversized batteries and additionally increase battery cost and system complexity

In addition, through the series circuit, the requirements on the design of the battery management system (BMS), safety and energy storage modules are increased, which in turn increases the cost

[0011] On the other hand, connecting battery modules purely in parallel requires operation at low battery system voltages, however, low battery system voltages lead to high battery currents at high power, resulting in excessive high currents between batteries and consumers. power loss

Implementation is technically time-consuming and expensive

Also, scaling effects are not removed here

The battery module is also a large and complex overall system

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