Device for determining the internal temperature of an energy storage device
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsMatthias Fleckenstein, Marcel Fenkart, Oliver Bohlen
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Abstract
A device is provided for determining the internal temperature of an electrochemical energy storage device, particularly for a motor vehicle. The internal temperature of a cell winding of the energy storage device is determined by calculation in a control device of the energy storage device by way of a thermal model for the energy storage device which is saved in the control device.
Claims16
An electrochemical energy storage device for a motor vehicle, comprising a control device in which a thermal model of the electrochemical energy storage device is stored, wherein the control device is operatively configured to:
- determine a heat volume exchanged between adjacent thermal capacitances that is determined iteratively from a temperature difference between said adjacent thermal capacitances, in real-time during operation of the control device and over a plurality of prespecified time interval,
- determine an internal temperature of a cell winding of the electrochemical energy storage device on an iterative basis over the plurality of prespecified time intervals using the thermal model stored in the control device and the determined heat volume exchanges for corresponding ones of the plurality of prespecified time intervals;
- and
- regulate at least one of a cooling and heating function of the electrochemical energy storage device based on at least one of the determined internal temperatures of the cell winding,
- wherein adjacent thermal capacitances represent at least distinct thermal capacitances of respective adjacent storage device components.
Dependencies are inferred from the claim text.