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US 2014/0152315 A1Published application
Transient detection of an exceptional charge event in a series connected battery element
AssigneeTesla Motors, Inc.
InventorsFrancisco LePort, Scott Ira Kohn
Life of this patent
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Abstract
A system and method for identifying and responding to exceptional charge events of series-connected energy storage elements.
Claims23
An exceptional charge event detector for an energy storage system having a plurality of series-connected battery elements, comprising:
- a data acquisition system, coupled to the plurality of series-connected battery elements and determining, for each battery element of the plurality of series-connected battery elements, an associated charge dependent parameter during an operational period of the energy storage system;
- a controller, coupled to said data acquisition system, establishing a characterization for each battery element of the plurality of series-connected battery elements from said associated charge dependent parameters;
- wherein said characterization includes one of an exceptional characteristic pattern for said operational period or a normal characteristic pattern for said operational period;
- and
- wherein said controller detects an exceptional charge event for a selected one battery element whenever said characterization for said selected one battery element includes an associated exceptional characteristic pattern during said operational period.
2 more elements
A rechargeable energy storage system having a plurality of series-connected lithium-ion battery elements, comprising:
- a voltage measurement and balancing system detecting and reducing voltage imbalances between voltage levels of the plurality of battery elements of the energy storage system wherein said voltage measurement and balancing system uses a first detection modality to determine an existence of a voltage imbalance;
- and
- an exceptional charge event detector monitoring the plurality of battery elements for an exceptional charge event using a second detection modality different from said first detection modality.
A computer-implemented method for detecting an exceptional charge event for an energy storage system having a plurality of series-connected battery elements, comprising:
- a) determining, for each battery element of the plurality of series-connected battery elements, an associated charge dependent parameter during an operational period of the energy storage system;
- b) establishing a characterization for each battery element of the plurality of series-connected battery elements from said associated charge dependent parameters;
- wherein said characterization includes one of an exceptional characteristic pattern for said operational period or a normal characteristic pattern for said operational period;
- and
- c) detecting an exceptional charge event for a selected one battery element whenever said characterization for said selected one battery element includes an associated exceptional characteristic pattern during said operational period.
2 more elements
Dependencies are inferred from the claim text.