A low-temperature lithium battery management system for an electric forklift and its control method

Abstract

The present invention is to overcome the problem that the lithium battery runs for a short time and needs frequent charging and maintenance in a low temperature environment, and provides a low-temperature lithium battery management system and its control method for electric forklifts, which can accurately predict the health status and life attenuation of the battery The situation enables timely maintenance of lithium battery packs to ensure the stable operation of electric forklifts at low temperatures. The following technical solutions are adopted: including control unit, display unit, signal acquisition unit, battery status evaluation unit, temperature control unit, charging and discharging Ratio control unit, fault interruption unit and electric forklift lithium battery pack. The control method includes the following steps: the signal acquisition unit transmits all the collected data to the battery state evaluation unit and the control unit; the battery state evaluation unit receives and predicts a future temperature change trend based on the above data, and transmits the prediction result to the control unit; The control unit receives collected data, receives prediction results, and gives execution commands.

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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