US 2016/0107526 A1 · COOLING STRATEGY FOR BATTERY SYSTEMS

Abstract

Embodiments describe a battery system that includes a first battery module coupled to a regenerative braking system and a control module that controls operation of the battery system by: determining a predicted driving pattern over a prediction horizon using a driving pattern recognition model based in part on a battery current and a previous driving pattern; determining a predicted battery resistance of the first battery module over the prediction horizon using a recursive battery model based in part on the predicted driving pattern, the battery current, a present bus voltage, and a previous bus voltage; determining a target trajectory of a battery temperature of the first battery module over a control horizon using an objective function; and controlling magnitude and duration of electrical power supplied from the regenerative such that a predicted trajectory of the battery temperature is guided toward the target trajectory of the battery temperature during the control horizon.

Claims27

Dependent claims

A battery system configured to be used in an automotive vehicle, wherein the battery system comprises:

a first battery module electrically coupled to a regenerative braking system;
and
a control module configured to control operation of the battery system by:
determining a predicted driving pattern of the automotive vehicle over a prediction horizon using a driving pattern recognition model based at least in part on a battery current and a previous driving pattern of the automotive vehicle;
determining a predicted battery resistance of the first battery module over the prediction horizon using a recursive battery model based at least in part on the predicted driving pattern, the battery current, a present bus voltage, and a previous bus voltage;
determining a target trajectory of a battery temperature of the first battery module over a control horizon using an objective function to balance effects of the battery temperature on aspects of the first battery module;
and
controlling magnitude and duration of electrical power supplied from the regenerative braking system to the first battery module such that a predicted trajectory of the battery temperature is guided toward the target trajectory of the battery temperature during the control horizon.

5 more elements

A tangible non-transitory, computer readable medium of a lithium ion battery system configured to store instructions executable by a processor in an automotive vehicle, wherein the instructions comprise instructions to:

determine, using the processor, temperature of a lithium ion battery module;
determine, using the processor, a temperature threshold;
instruct, using the processor, an electrical energy generator to output a high electrical power when the temperature of the lithium ion battery module is not greater than the temperature threshold to enable the lithium ion battery system to utilize a first amount of storage capacity to capture generated electrical energy;
and
instruct, using the processor, the electrical energy generator to output a low electrical power when the temperature of the lithium ion battery module is greater than the temperature threshold to enable the lithium ion battery system to utilize a second amount of storage capacity to capture generated electrical energy, wherein the second amount is less than the first amount.

2 more elements

A method for controlling temperature of a battery system, comprising:

determining, using a control module, temperature of a lithium ion battery module in the battery system;
determining, using the control module, a temperature threshold and a target trajectory of the temperature over a control horizon;
determining, using the control module, battery parameter setpoints based at least in part on a thermal predictive model, wherein the thermal predictive model is configured to describe a relationship between the battery parameter setpoints and a predicted trajectory of the temperature over a prediction horizon;
and
controlling, using the control module, operation of the battery system to implement the battery parameter setpoints such that the predicted trajectory of the temperature is guided toward the target trajectory and maintained below the temperature threshold over the control horizon.

2 more elements

Dependencies are inferred from the claim text.

Cooling strategy for battery systems

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Cooling strategy for battery systems

Life of this patent

Abstract

Claims27