DEVICE AND METHOD OF TESTING AN INTERNAL RESISTANCE OF A BATTERY PACK
First Claim
1. An internal resistance testing device, comprising:
- an excitation source and a battery pack, which form a loop circuit;
an adjustable resistance R located in the loop circuit;
a sampling unit configured to measure;
the voltage between two sides of the battery pack,the voltage between two sides of the adjustable resistance R, anda value of the adjustable resistance R; and
a control unit configured to calculate an internal resistance of the battery pack according to the voltages measured by the sampling unit and the value of the adjustable resistance R.
1 Assignment
0 Petitions
Accused Products
Abstract
An internal resistance testing device includes an excitation source and a battery pack, an adjustable resistance R, a sampling unit, and a control unit. The excitation source and the battery pack form a loop circuit. The adjustable resistance R may be located at the loop circuit formed by the excitation source and the battery pack. The sampling unit samples the voltage between two sides of the battery pack, the voltage between two sides of the adjustable resistance R, and the value of the adjustable resistance R. The control unit calculates internal resistance of the battery pack according to the signal value collected by the sampling unit. The internal resistances of different voltage-ranges the battery pack are determined by adjusting the value of the adjustable resistance R to cause the actual excitation voltage to be equal to the range voltage of the sampling unit. The voltage between two sides of the adjustable resistance R is made equal to the range voltage of the sampling unit by adjusting the value of the adjustable resistance R, which effectively improves measurement accuracy of the internal resistance.
9 Citations
17 Claims
-
1. An internal resistance testing device, comprising:
-
an excitation source and a battery pack, which form a loop circuit; an adjustable resistance R located in the loop circuit; a sampling unit configured to measure; the voltage between two sides of the battery pack, the voltage between two sides of the adjustable resistance R, and a value of the adjustable resistance R; and a control unit configured to calculate an internal resistance of the battery pack according to the voltages measured by the sampling unit and the value of the adjustable resistance R. - View Dependent Claims (2, 3)
-
-
4. A method for determining an internal resistance of a battery pack, the battery pack contained in a loop circuit having an excitation source and an adjustable resistance R, the method comprising the steps of:
-
injecting an excitation signal into the loop circuit; sampling an excitation voltage V2 generated between two sides of the battery pack; sampling an excitation voltage V1 between the two sides of the adjustable resistance R; determining a value of the adjustable resistance R; adjusting the value of the adjustable resistance R to cause the excitation voltage V2 to be equal to a range voltage V (standard); and calculating the internal resistance of the battery pack based on the excitation voltage V2, the excitation voltage V1, and the adjusted value of the adjustable resistance R. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification