Synchronized data sampling systems and methods
First Claim
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1. A battery management system for energy efficient management of a rechargeable multi-cell battery pack, comprising:
- a plurality of local monitors coupled to a plurality of battery cells and operable for sampling status information for said battery cells;
a plurality of upper controllers coupled to said local monitors and operable for estimating a state of at least one battery cell of said battery cells according to the status information for said at least one battery cell; and
a central controller coupled to said upper controllers and operable for broadcasting a sample command to at least one upper controller of said upper controllers,wherein said at least one upper controller receives said sample command from said central controller and broadcasts said sample command to corresponding local monitors of said local monitors, and wherein said corresponding local monitors synchronously start a sample period for said sampling in response to said sample command, sample the status information for corresponding battery cells of said battery cells during said sample period, and synchronously stop said sample period.
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Abstract
A battery management system with synchronized data sampling for a battery pack including multiple battery cells is disclosed. The battery management system includes a plurality of local monitors coupled to a plurality of battery cells and operable for sampling status information for the battery cells. The battery management system further includes a central controller coupled to the local monitors and operable for broadcasting a sample command to the local monitor synchronously, wherein the local monitors start to sample the status information for the battery cells in response to the sample command.
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Citations
20 Claims
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1. A battery management system for energy efficient management of a rechargeable multi-cell battery pack, comprising:
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a plurality of local monitors coupled to a plurality of battery cells and operable for sampling status information for said battery cells; a plurality of upper controllers coupled to said local monitors and operable for estimating a state of at least one battery cell of said battery cells according to the status information for said at least one battery cell; and a central controller coupled to said upper controllers and operable for broadcasting a sample command to at least one upper controller of said upper controllers, wherein said at least one upper controller receives said sample command from said central controller and broadcasts said sample command to corresponding local monitors of said local monitors, and wherein said corresponding local monitors synchronously start a sample period for said sampling in response to said sample command, sample the status information for corresponding battery cells of said battery cells during said sample period, and synchronously stop said sample period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for energy efficient managing of a plurality of battery cells of a rechargeable multi-cell battery pack, comprising:
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broadcasting a sample command from a central controller to at least one upper controller of a plurality of upper controllers; broadcasting said sample command from said at least one upper controller to corresponding local monitors in a plurality of local monitors; synchronously starting a sample period, in said corresponding local monitors, in response to said sample command; sampling status information for corresponding battery cells of said battery cells, using said corresponding local monitors, during said sample period; synchronously stopping said sample period in said corresponding local monitors; and estimating a state of at least one battery cell of said corresponding battery cells according to the status information for said at least one battery cell. - View Dependent Claims (10, 11, 12, 13)
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14. A circuit for energy efficient monitoring of a plurality of battery cells of a rechargeable multi-cell battery pack, comprising:
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a plurality of local monitors operable for sampling status information for said battery cells; a plurality of upper controllers operable for receiving a sample command and estimating a state of at least one battery cell of said battery cells according to the status information for said at least one battery cell; and a plurality of buses coupled between said upper controllers and said local monitors and operable for transferring said sample command from at least one upper controller of said upper controllers to corresponding local monitors of said local monitors synchronously, wherein said corresponding local monitors synchronously start a sample period for said sampling in response to said sample command, sample the status information for corresponding battery cells of said battery cells during said sample period, and synchronously stop said sample period. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification