Patent ID: 9045054
Filing Date: 2015-06-02
Classification: B60L,H01M,H02J,H02P,Y02E,Y02T

Abstract:
1. A battery system comprising: a battery; a DC voltage intermediate circuit connected to the battery; an AC converter connected to the DC voltage intermediate circuit; and an electric motor connected to the AC converter, wherein the DC voltage intermediate circuit includes a capacitor, wherein the battery includes a battery module string having a plurality of battery modules that are connected in series, and a control unit, wherein each battery module of the plurality of battery modules includes a coupling unit and at least one battery cell connected between a first input and a second input of the coupling unit, wherein the coupling unit is configured (i) to switch the at least one battery cell between a first terminal of a respective battery module of the plurality of battery modules and a second terminal of the respective battery module in response to a first control signal, and (ii) in response to a second control signal, to connect the first terminal to the second terminal, and wherein the control unit is configured to transmit the first control signal to a variable number of battery modules of the battery module string and to transmit the second control signal to a remaining number of battery modules of the battery module string and thus to set a voltage of the DC voltage intermediate circuit in a variable manner.