Balancing Of Battery Cells Connected In Parallel
AssigneeNokia Corporation
InventorsMatti J. Naskali, Rune Lindholm, Heikki Sakari Paananen, Frank Borngraber
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Abstract
Systems and techniques for parallel battery balancing are described. A battery assembly comprises a first battery interface and a second battery interface; the first battery interface may connect to a first battery exhibiting a first voltage profile and the second battery interface may connect to a second battery exhibiting a second voltage profile. The battery assembly further comprises a current flow control mechanism to direct current flow to, from, and between the first battery and the second battery, with current directed to each battery being adapted so as to be compatible with the voltage profile of the battery.
Claims18
An apparatus, comprising:
- a first battery interface;
- a second battery interface connected in parallel to the first battery interface;
- and
- a current flow control mechanism for controlling current flow to at least one of the first battery interface and the second battery interface, wherein controlling current flow to and from the at least one of the first battery interface and the second battery interface is based at least in part on comparison between a voltage at the interface and a reference voltage value, wherein controlling the current flow comprises adjusting current flowing to the first battery interface so as to be compatible with a voltage profile exhibited at the first battery interface and adjusting current flowing to the second battery so as to be compatible with a voltage profile exhibited at the second battery interface.
A mobile device comprising:
- a first battery interface;
- a second battery interface connected in parallel to the first battery interface;
- and
- a current flow control mechanism for controlling current flow to at least one of the first battery interface and the second battery interface, wherein controlling current flow to and from the at least one of the first battery interface and the second battery interface is based at least in part on comparison between a voltage at the interface and a reference voltage value, wherein controlling the current flow comprises adjusting current flowing to the first battery interface so as to be compatible with a voltage profile exhibited at the first battery interface and adjusting current flowing to the second battery so as to be compatible with a voltage profile exhibited at the second battery interface.
A method comprising:
- for each of a first and a second battery interface connected in parallel in a battery assembly, comparing a battery voltage against a reference value;
- and
- controlling current flow to and from each battery interface based on a comparison of a voltage and the reference value;
- wherein controlling the current flow comprises adjusting the current flowing to the second battery interface so as to be compatible with a voltage profile exhibited at the first battery interface and adjusting the current flowing to the first battery interface so as to be compatible with a voltage profile exhibited at the second battery interface.
18-21. (canceled)
Dependencies are inferred from the claim text.