Electric forklift low-temperature type lithium battery management system and control method thereof

Abstract

The invention aims to overcome the defects that in a low-temperature environment, lithium battery operation time is short, frequent charging and maintenance are needed and provides an electric forklift low-temperature type lithium battery management system and a control method thereof. The health state and the service life attenuation condition of the battery can be accurately predicted and thus maintenance of lithium battery packs can be carried out timely to ensure stable operation of electric forklifts at low temperatures. According to the technical scheme, the lithium battery maintenance system comprises a control unit, a display unit, a signal acquisition unit, a battery state evaluation unit, a temperature control unit, a charging and discharging multiplying power control unit, a fault open circuit unit and the lithium battery pack of the electric forklift. The control method comprises the following steps the signal acquisition unit transmits all acquired data to the battery state evaluation unit and the control unit; the battery state evaluation unit receives a future temperature change trend predicted according to the data and transmits a prediction result to the control unit; and the control unit receives the acquired data, receives a prediction result and gives an execution command.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a low-temperature lithium battery management system for an electric forklift and a control method thereof. Background technique [0002] With the continuous development of the logistics industry, the logistics and warehousing of food and medicine has gradually become important. In order to prolong the shelf life of food and medicine, they usually need to be stored in low-temperature cold storage. Electric forklifts are small in size and good in mobility, making them the most suitable construction machinery for handling these items. At present, electric forklifts mainly use lithium batteries as the power source. Lithium batteries have high energy density, high working voltage and long cycle life, but the best working temperature range is 15-35°C, while the temperature of low-temperature cold storage is generally below 0°C. When the electric forklift works in a low-temperature cold stora...

AI Technical Summary

Problems solved by technology

When the electric forklift works in a low-temperature cold storage, the low-temperature environment reduces the fluidity of the electrolyte in its power source lithium battery, slows down the ion migration rate, and reduces the chemical reaction rate, thereby significantly reducing the electrochemical performance of the lithium battery, making the electric forklift The continuous running time of the lithium battery is shortened, which requires frequent charging and maintenance of the lithium battery, which not only increases the maintenance cost, but also shortens the life of the lithium battery

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