DYNAMIC ESTIMATION OF CELL CORE TEMPERATURE BY SIMPLE EXTERNAL MEASUREMENTS
First Claim
1. A method for dynamically estimating the core temperature of at least one cell in a battery during an operative period, the method comprising:
- receiving by at least one controller the surface temperature of the at least one cell, the current of the at least one cell, the voltage of the at least on cell, the state of charge of the at least one cell, and the period of time from the initiation of a rest period to the termination of the rest period;
determining an initial value of the lumped internal resistance of the at least one cell;
determining subsequent values of the lumped internal resistance recursively in real-time based on the initial value, the current, and the voltage; and
determining the core temperature of the at least one cell based on the surface temperature, the current, the obtained time, and the lumped internal resistance.
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Accused Products
Abstract
Methods and systems for dynamically estimating the core temperature of at least one cell in a battery during an operative period. The method includes receiving by at least one controller the surface temperature, the current, the voltage, the state of charge, and the period of time from the initiation of a rest period to the termination of the rest period, determining an initial value of the lumped internal resistance of the at least one cell, determining subsequent values of the lumped internal resistance recursively in real-time based on the initial value, the current, and the voltage, and determining the core temperature of the at least one cell based on the surface temperature, the current, the obtained time, and the lumped internal resistance. The system for dynamically estimating the core temperature of the cells in a battery includes a plurality of sensors configured to transmit signals related to surface temperature, current, and voltage of the battery, a timing device configured to transmit signals related to the period of time from the initiation of a rest period to the termination of the rest period, and a control system, wherein the control system comprises a memory device and a controller.
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Citations
20 Claims
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1. A method for dynamically estimating the core temperature of at least one cell in a battery during an operative period, the method comprising:
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receiving by at least one controller the surface temperature of the at least one cell, the current of the at least one cell, the voltage of the at least on cell, the state of charge of the at least one cell, and the period of time from the initiation of a rest period to the termination of the rest period; determining an initial value of the lumped internal resistance of the at least one cell; determining subsequent values of the lumped internal resistance recursively in real-time based on the initial value, the current, and the voltage; and determining the core temperature of the at least one cell based on the surface temperature, the current, the obtained time, and the lumped internal resistance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for dynamically estimating the core temperature of at least one cell in a battery in a vehicle during an operative period, wherein the vehicle receives at least a portion of its power from the battery, the system comprising:
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a plurality of sensors configured to transmit signals related to at least one of surface temperature, current, and voltage of the battery; a timing device configured to transmit signals related to the period of time from the initiation of a rest period to the termination of the rest period; a control system in signal communication with the plurality of sensors and the timing device, wherein the control system comprises a memory device and a controller in signal communication with the memory device with instructions for dynamically estimating the core temperature of at least one cell in a battery during an operative period and subsequent to a rest period, the instructions being written to; receive the surface temperature of the at least one cell, the current of the at least one cell, the voltage of the at least one cell, the state of charge of the at least one cell, the period of time from the initiation of the rest period to the termination of the rest period; determine an initial value of the lumped internal resistance of the at least one cell; and determine subsequent values of the lumped internal resistance recursively in real-time based on the initial value, the current, and the voltage; and determine the core temperature of the at least one cell based on the surface temperature, the current, the obtained time, and the lumped internal resistance. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification