Battery Balancing with Resonant Converter
First Claim
1. A system configured to charge with electric energy a first subset of storage cells and a second subset of storage cells from a storage comprising a serial arrangement of storage cells, the system comprisinga driver circuit configured to generate an AC voltage comprising a frequency component at an AC frequency from an electric energy source at a DC voltage;
- a transformer comprising a primary inductor and a first and a second secondary inductor which are magnetically coupled to the primary inductor;
a first resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a first modified AC voltage;
wherein the first resonance circuit comprises the first secondary inductor;
a first rectifying unit configured to generate a first modified DC voltage from the first modified AC voltage, and configured to provide electric energy at the first modified DC voltage to the first subset of storage cells;
a second resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a second modified AC voltage;
wherein the second resonance circuit comprises the second secondary inductor; and
a second rectifying unit configured to generate a second modified DC voltage from the second modified AC voltage, and configured to provide electric energy at the second modified DC voltage to the second subset of storage cells.
1 Assignment
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Accused Products
Abstract
A system and a method for charging of rechargeable batteries is presented. In particular, The charging of battery stacks comprising a plurality of battery cells or storage cells is presented. The system is configured to charge a first subset of storage cells from a storage comprising a serial arrangement of storage cells. The system comprises a driver circuit configured to generate an AC voltage comprising a frequency component at an AC frequency from an electric energy source at a DC voltage. Furthermore, the system comprises a first resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a modified AC voltage. In addition, the system comprises a first rectifying unit configured to generate a modified DC voltage from the modified AC voltage, and configured to provide electric energy at the modified DC voltage to the first subset of storage cells.
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Citations
30 Claims
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1. A system configured to charge with electric energy a first subset of storage cells and a second subset of storage cells from a storage comprising a serial arrangement of storage cells, the system comprising
a driver circuit configured to generate an AC voltage comprising a frequency component at an AC frequency from an electric energy source at a DC voltage; -
a transformer comprising a primary inductor and a first and a second secondary inductor which are magnetically coupled to the primary inductor; a first resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a first modified AC voltage;
wherein the first resonance circuit comprises the first secondary inductor;a first rectifying unit configured to generate a first modified DC voltage from the first modified AC voltage, and configured to provide electric energy at the first modified DC voltage to the first subset of storage cells; a second resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a second modified AC voltage;
wherein the second resonance circuit comprises the second secondary inductor; anda second rectifying unit configured to generate a second modified DC voltage from the second modified AC voltage, and configured to provide electric energy at the second modified DC voltage to the second subset of storage cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for charging a first subset of storage cells and a second subset of storage cells from a storage comprising a serial arrangement of storage cells, the method comprising the steps of:
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generating an AC voltage comprising a frequency component at an AC frequency from a electric energy source at a DC voltage; providing a transformer comprising a primary inductor and a first and a second secondary inductor which are magnetically coupled to the primary inductor; amplifying and/or attenuating the AC voltage as a function of the AC frequency, to yield a first modified AC voltage using a first resonance circuit comprising the first secondary inductor and to yield a second modified AC voltage using a second resonance circuit comprising the second secondary inductor; generating a first modified DC voltage from the first modified AC voltage and a second modified DC voltage from the second modified AC voltage; and providing electric energy at the first modified DC voltage to the first subset of storage cells and at the second modified DC voltage to the second subset of storage cells. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A circuit configured to charge with electric energy a first subset of storage cells and a second subset of storage cells from a storage comprising a serial arrangement of storage cells, the system comprising
a driver circuit configured to generate an AC voltage comprising a frequency component at an AC frequency from an electric energy source at a DC voltage; -
a transformer comprising a primary inductor and a first and a second secondary inductor which are magnetically coupled to the primary inductor; a first resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a first modified AC voltage;
wherein the first resonance circuit comprises the first secondary inductor;a first rectifying unit configured to generate a first modified DC voltage from the first modified AC voltage, and configured to provide electric energy at the first modified DC voltage to the first subset of storage cells; a second resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a second modified AC voltage;
wherein the second resonance circuit comprises the second secondary inductor; anda second rectifying unit configured to generate a second modified DC voltage from the second modified AC voltage, and configured to provide electric energy at the second modified DC voltage to the second subset of storage cells. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification