Method and device for predicting remaining useful life of battery
A technology of effective life and prediction method, applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problem of reducing battery use efficiency, reducing the accuracy and reliability of remaining effective life prediction, and cannot well characterize the remaining effective life. life and other issues, to achieve the effect of improving efficiency, accuracy and reliability
Active Publication Date: 2020-03-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Problems solved by technology
However, the physical model in the prior art cannot well characterize the remaining effective life, which reduces the accuracy and reliability of the remaining effective life prediction and reduces the efficiency of the battery
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[0047] The core of the present invention is to provide a method and device for predicting the remaining effective life of a battery, which can well characterize the remaining effective life, improve the accuracy and credibility of the remaining effective life prediction, and improve the use efficiency of the battery.
[0048] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0049] Please ref...
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The invention discloses a method and a device for predicting the remaining useful life of a battery. The method includes the following steps: acquiring N full capacity groups of a battery corresponding to N values of the life influence factor, wherein each full capacity group includes the full capacity under M cycle indexes; getting the correspondence between the full capacity and the cycle time corresponding to each value of the life influence factor in a one-to-one manner according to the full capacity under M cycle indexes in each full capacity group; acquiring the values of the used life influence factor for the running of the battery at historical time and at the current time and the accumulated run time corresponding to each value; getting the total capacity attenuation of the battery according to the correspondence between the full capacity and the cycle time corresponding to the values of the used life influence factor and the accumulated run time corresponding to each value; and getting the remaining useful life of the battery according to the rated capacity, total capacity attenuation and failure capacity of the battery. The prediction accuracy of remaining useful life and the utilization efficiency of the battery are improved.
Description
Technical field [0001] The invention relates to the technical field of battery system management, in particular to a method and device for predicting the remaining effective life of a battery. Background technique [0002] At present, electric vehicles have gradually become the mainstream of current research and application of new energy vehicles. The battery of an electric vehicle is its energy source, which determines the operating efficiency and safety performance of the electric vehicle. Therefore, effective and reasonable management and control of its battery are very important. In the battery management and control system, how to accurately predict the remaining useful life of the battery is an extremely critical issue. [0003] The remaining effective life refers to the estimated remaining effective operating time of the battery from the current normal working state to the occurrence of potential failures. The remaining effective life is affected by factors such as temperat...
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IPC IPC(8): G01R31/392G01R31/396
CPCG01R31/392G01R31/396
Inventor 杜强韩琪张一鸣田爽刘兆平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI