Industrial truck with a battery and method for operating an industrial truck with a battery
First Claim
Patent Images
1. An industrial truck, comprising:
- at least one drive battery; and
at least one apparatus for determining a state of charge of the battery, wherein the apparatus for determining the state of charge of the battery comprises means for determining a dynamic internal resistance and means for determining an internal cell voltage of the battery with the aid of the dynamic internal resistance,wherein the apparatus for determining the state of charge of the battery further comprises means for compensating for a diffusion overvoltage, andwherein the means for compensating for a diffusion overvoltage comprises;
an attenuator, which calculates a level of the diffusion overvoltage as a function of power drawn, anda low-pass filter, which reproduces a time delay between a withdrawal of power and a change in the diffusion overvoltage.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to an industrial truck with at least one drive battery and at least one apparatus (A) for determining the state of charge of the battery and to a method for operating such an industrial truck. The apparatus (A) for determining the state of charge of the battery includes a device (B) for determining the dynamic internal resistance and a device (C) for determining the internal cell voltage of the battery with the aid of the dynamic internal resistance.
-
Citations
16 Claims
-
1. An industrial truck, comprising:
-
at least one drive battery; and at least one apparatus for determining a state of charge of the battery, wherein the apparatus for determining the state of charge of the battery comprises means for determining a dynamic internal resistance and means for determining an internal cell voltage of the battery with the aid of the dynamic internal resistance, wherein the apparatus for determining the state of charge of the battery further comprises means for compensating for a diffusion overvoltage, and wherein the means for compensating for a diffusion overvoltage comprises; an attenuator, which calculates a level of the diffusion overvoltage as a function of power drawn, and a low-pass filter, which reproduces a time delay between a withdrawal of power and a change in the diffusion overvoltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for operating an industrial truck, comprising:
-
determining an internal cell voltage of a battery with the aid of a dynamic internal resistance of the battery, and determining a state of charge of the battery from the internal cell voltage of the battery, wherein an internal open-circuit cell voltage is calculated from the addition of an internal cell terminal voltage and a diffusion overvoltage, and wherein the diffusion overvoltage is determined by an apparatus for determining the diffusion overvoltage comprising; an attenuator, which calculates a level of the diffusion overvoltage as a function of power drawn, and a low-pass filter, which reproduces a time delay between a withdrawal of power and a change in the diffusion overvoltage. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification