Method for Determining the Internal Ohmic Resistance of a Battery Module, Battery Management System and Motor Vehicle
First Claim
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1. A method for determining the an internal ohmic resistance of a first battery module, comprising:
- measuring a first voltage intensity of the first battery module;
connecting, after obtaining the first voltage intensity, the first battery module to a second battery module subject to a load current;
measuring a second voltage intensity of the first battery module after the connection of the first battery module; and
determining the internal ohmic resistance with reference to the first voltage intensity and the second voltage intensity.
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Abstract
A method for determining an internal ohmic resistance of a first battery module includes measuring a first voltage intensity of the first battery module. The first battery module is connected to at least one second battery module subject to a current load after obtaining the first voltage intensity. A second voltage intensity of the first battery module is measured after the connection of the first battery module. The internal ohmic resistance is determined with reference to the first voltage intensity and the second voltage intensity.
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Citations
10 Claims
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1. A method for determining the an internal ohmic resistance of a first battery module, comprising:
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measuring a first voltage intensity of the first battery module; connecting, after obtaining the first voltage intensity, the first battery module to a second battery module subject to a load current; measuring a second voltage intensity of the first battery module after the connection of the first battery module; and determining the internal ohmic resistance with reference to the first voltage intensity and the second voltage intensity. - View Dependent Claims (2, 3, 4)
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5. A battery management system connected to a battery module bank, wherein the battery module bank includes:
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at least two battery modules configured to be connectable and disconnectable in series at least one of positively and negatively; a first device configured to measure battery module voltage Intensities; and a second device configured to transmit the measured module voltage intensities to the battery management system, and wherein the battery management system is configured to; determine a change of the transmitted battery module voltage intensities of a first battery module of the at least two battery modules in response to a connection of the first battery module of the at least two battery modules compared with a disconnection of a second battery module of the at least two battery modules to at least a third battery module of the at least two battery modules under load current; and determine an impedance of the first battery module of the at least two battery modules based on the determined change of the transmitted battery module voltage intensities. - View Dependent Claims (6, 7, 8)
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9. A multi-phase battery system comprising:
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at least two parallel battery module banks, wherein each of the battery module banks includes; at least two battery modules configured to be connectable and disconnectable in series at least one of positively and negatively; a first device configured to measure battery module voltage intensities; and a second device configured to transmit the measured module voltage intensities to a battery management system; and the battery management system connected to the at least two battery modules, wherein the battery management system is configured to; determine a change of the transmitted battery module voltage intensities of a first battery module of the at least two battery modules in response to a connection of the first battery module of the at least two battery modules compared with a disconnection of a second battery module of the at least two battery modules to at least a third battery module of the at least two battery modules under load current; and determine an impedance of the first battery module of the at least two battery modules based on the determined change of the transmitted battery module voltage intensities, wherein the multi-phase battery system is configured to provide alternating voltages phase-shifted in relation to each of the at least two parallel battery module banks and a predetermined alternating current intensity by using the at least two parallel battery module banks. - View Dependent Claims (10)
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Specification