On-line life calculation method for battery system

Abstract

The invention provides an on-line life calculation method for a battery system. The on-line life calculation method for the battery system provided by the invention comprises the following three steps: inputting the total energy of charging and discharging of the battery system during the entire life process; calculating the total energy of the finished charging and discharging of the batter system at the moment; and utilizing the two energies to obtain an on-line life of the battery system. Compared with the existing calculation method, the on-line life calculation method for the battery system provided by the invention has the following two advantages: few input parameters are needed for calculating the on-line life and the parameters can be collected by a simple device, namely, the battery system can be carried out the on-line life calculation simply by calculating the total energy of charging and discharging of the battery system; and meanwhile, the calculation process is relatively simple and can be realized without the complicated software and hardware devices.

Description

technical field [0001] The invention belongs to the field of battery systems of new energy vehicles, and in particular relates to a battery system online life calculation method. Background technique [0002] Energy shortage and environmental pollution are major problems facing the world, and making full use of clean energy is an effective way to alleviate this problem. The development of energy-saving and environment-friendly automobiles has become an important direction of technological innovation in the world automobile industry and an inevitable choice for the sustainable development of the automobile industry. The high complexity and design difficulty of the battery system have always been the bottleneck restricting the promotion and application of this technology to new energy electric vehicles. [0003] The types of power batteries currently used in new energy vehicles include: lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries and lithium ...

AI Technical Summary

Problems solved by technology

However, the workload and difficulty of obtaining the SOH estimation table required in the patent of the above-mentioned method and device for estimating the state of health of the battery are relatively large, and there are many unstable factors.

Especially when the battery degradation is serious, the data to be collected is more difficult to obtain

In the above-mentioned patents on the diagnosis method of the battery health state, it is difficult to accurately set the acceptable value of the discharge current variation, and the selection of the acceptable value has a great impact on the diagnosis of the battery health state.

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