Method and device for calculating battery pack capacity
A calculation method and technology of a calculation device, which are applied in measurement devices, measurement of electrical variables, measurement of electricity, etc., can solve the problem that the single-cell battery capacity calculation method cannot be applied to the battery pack capacity calculation, etc., achieve reliable battery pack capacity results, and improve calculation. Accuracy, the effect of eliminating accumulated errors
Active Publication Date: 2010-06-16
BYD CO LTD
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Problems solved by technology
[0007] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, and can solve the problem that the existing single-cell battery capacity calculation method cannot be applied to the battery pack capacity calculation
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[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0024] The present invention mainly lies in that the current capacity of the battery pack is recalculated during each system power-on initialization process, and the current integration method is used to calculate the battery pack capacity on the basis of the recalculated capacity after the system power-on initialization, Therefore, the cumulative error caused by the current integration method can be eliminated, and the calculation accuracy can be improved. As an embodiment of the present invention, when calculating the current capacity ...
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The invention provides a method and a device for calculating the battery pack capacity, wherein the method comprises the following steps of: calculating the current capacity of each single battery when a system is electrified and initiated; calculating the current battery pack capacity and the current available capacity of a battery pack according to the current capacity of each single battery; and calculating the battery pack capacity by adopting a current integration method on the basis of the calculated current battery pack capacity and the calculated current available capacity of the battery pack after the system is electrified and initiated. In the invention, the current capacity of the battery pack is recalculated by utilizing each electrifying and initiating process of the system, and the battery pack capacity is calculated by adopting the current integration method on the basis of recalculating the capacity after the system is electrified and initiated, therefore, the accumulated error caused by the current integration method can be eliminated, and the calculation accuracy is improved.
Description
technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a method and device for calculating the capacity of a battery pack. Background technique [0002] With the shortage of energy and the aggravation of environmental pollution, the development of the traditional automobile industry is facing many difficulties. Therefore, the emergence of electric vehicles and hybrid vehicles is favored by the majority of automobile manufacturers and consumers, and has become a hot spot in the development of automobiles. Electric vehicles and hybrid vehicles refer to vehicles powered by electric energy, and generally use high-efficiency rechargeable batteries or fuel cells as power sources. Since electric energy is a secondary energy source, it can come from various sources such as wind energy, water energy, nuclear energy, thermal energy, and solar energy. Therefore, electric vehicles are zero-emission vehicles, which can effectivel...
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Inventor 尹韶文张建华
Owner BYD CO LTD