Control apparatus and method for conducting fast battery charge
First Claim
1. A battery charging system comprising:
- a charging source; and
at least one battery cell;
a battery internal temperature sensor configured to measure an internal temperature directly, and without the use of mathematical model or mathematical algorithm, of the at least one battery cell responsive to charging of the at least one battery cell by the charging source, the battery internal temperature sensor comprising;
an alternating signal source to apply an alternating signal to the cell to generate a phase-shifted alternating signal at the cell;
a phase meter to detect the phase-shift as a phase difference between a frequency of the applied alternating signal and a frequency of the phase-shifted alternating signal; and
a phase-to-temperature converter to determine the internal temperature of the cell based on the phase difference;
wherein the alternating signal source includes one or more of an alternating current source to generate a phase-shifted alternating voltage, and an alternating voltage source to generate a phase-shifted alternating current; and
a charge controller configured to;
receive indications of the internal temperature of the at least one battery cell over time,identify an indication that the at least one battery cell is at a point of full charge based on changes in the internal temperature, andinterrupt power delivery from the charging source to the at least one battery cell responsive to the indication that the at least one battery cell is at the point of full charge.
1 Assignment
0 Petitions
Accused Products
Abstract
A battery charging system includes a charging source, at least one battery cell, a battery internal temperature sensor configured to measure an internal temperature of the at least one battery cell responsive to charging of the at least one battery cell by the charging source, and a charge controller. The charge controller is configured to receive indications of the internal temperature of the at least one battery cell over time, to identify an indication that the at least one battery cell is at a point of full charge based on rate of change of the internal temperature, and to interrupt power delivery from the charging source to the at least one battery cell responsive to the indication that the at least one battery cell is at the point of full charge.
-
Citations
20 Claims
-
1. A battery charging system comprising:
-
a charging source; and at least one battery cell; a battery internal temperature sensor configured to measure an internal temperature directly, and without the use of mathematical model or mathematical algorithm, of the at least one battery cell responsive to charging of the at least one battery cell by the charging source, the battery internal temperature sensor comprising; an alternating signal source to apply an alternating signal to the cell to generate a phase-shifted alternating signal at the cell; a phase meter to detect the phase-shift as a phase difference between a frequency of the applied alternating signal and a frequency of the phase-shifted alternating signal; and a phase-to-temperature converter to determine the internal temperature of the cell based on the phase difference; wherein the alternating signal source includes one or more of an alternating current source to generate a phase-shifted alternating voltage, and an alternating voltage source to generate a phase-shifted alternating current; and a charge controller configured to; receive indications of the internal temperature of the at least one battery cell over time, identify an indication that the at least one battery cell is at a point of full charge based on changes in the internal temperature, and interrupt power delivery from the charging source to the at least one battery cell responsive to the indication that the at least one battery cell is at the point of full charge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 15, 16, 17)
-
-
10. A battery charging controller being in communication with a battery internal temperature sensor configured to measure an internal temperature of at least one battery cell responsive to charging of the at least one battery cell by a charging source, the battery internal temperature sensor comprising:
-
an alternating signal source to apply an alternating signal to the cell to generate a phase-shifted alternating signal at the cell; a phase meter to detect the phase-shift as a phase difference between a frequency of the applied alternating signal and a frequency of the phase-shifted alternating signal; and a phase-to-temperature converter to determine the internal temperature of the cell based on the phase difference; wherein the alternating signal source includes one or more of an alternating current source to generate a phase-shifted alternating voltage, and an alternating voltage source to generate a phase-shifted alternating current; and wherein the battery charging controller comprises processing circuitry, the processing circuitry being configured to; receive indications of the internal temperature of the at least one battery cell over time; identify an indication that the at least one battery cell is at a point of full charge based on changes in the internal temperature; and interrupt power delivery from the charging source to the at least one battery cell responsive to the indication that the at least one battery cell is at the point of full charge. - View Dependent Claims (11, 12, 13, 14, 18)
-
-
19. A method comprising:
-
receiving indications of an internal temperature of at least one battery cell from a battery internal temperature sensor; identifying an indication that the at least one battery cell is at a point of full charge based on changes in the internal temperature; and interrupting power delivery from a charging source to the at least one battery cell responsive to the indication that the at least one battery cell is at the point of full charge; wherein the battery internal temperature sensor comprises; an alternating signal source to apply an alternating signal to the cell to generate a phase-shifted alternating signal at the cell; a phase meter to detect the phase-shift as a phase difference between a frequency of the applied alternating signal and a frequency of the phase-shifted alternating signal; and a phase-to-temperature converter to determine the internal temperature of the cell based on the phase difference; wherein the alternating signal source includes one or more of an alternating current source to generate a phase-shifted alternating voltage, and an alternating voltage source to generate a phase-shifted alternating current. - View Dependent Claims (20)
-
Specification