Method for controlling a battery, and battery for carrying out the method

摘要

A method is used for controlling a battery having at least one battery module line with a plurality of battery modules that are connected in series. Each battery module has at least one battery cell, at least one coupling unit, a first connection, and a second connection. Each battery module is configured to assume one of at least two switching states dependent on a control of the coupling unit. The different switching states correspond to different voltage values between the first connection and the second connection of the battery module. The method includes determining a ranking among the battery modules. The method also includes engaging the battery modules in a supply of a desired output voltage of the battery module line using the ranking. The battery modules compare respective battery module operating states among one another and determine the ranking on the basis of the comparison.

主权项

1. A method for controlling a battery having at least one battery module string having a plurality of battery modules which are connected in series, each battery module including at least one battery cell, at least one coupling unit, a first connection and a second connection and being configured to assume one of at least two switching states as a function of actuation of the at least one coupling unit, various switching states corresponding to different voltage values between the first connection and the second connection of the battery module, the method comprising:
i. determining a ranking of the battery modules with which said battery modules are involved in providing a desired output voltage of the battery module string, wherein the battery modules compare their respective operating states and determine the ranking on the basis of the comparison; ii. determining, with a controller, an output voltage, which is to be provided, of the battery module string; iii. sending, with the controller, a message to at least one of the battery modules; iv. establishing a switching state, which is to be assumed, in each of the battery modules on the basis of a comparison between the message sent by the controller and the determined ranking; and v. assuming, by each of the battery modules, the established switching state.