CAN communication based three-mode intelligent control method and application thereof in dual-power supply dynamic system

Abstract

The invention relates to a CAN communication based three-mode intelligent control method, in particular to application of a CAN communication based three-mode intelligent control technology in a dual-power supply dynamic system composed of a lithium ion capacitor and all-solid-state lithium/lithium ion battery, and belongs to the field of application of new energy. The lithium ion capacitor is high in power density, ultrahigh in rate charging and discharging performance and relatively low in energy density, and the all-solid-state/lithium ion battery has excellent energy density. In the system, an all-solid-state lithium/lithium ion battery pack and a lithium ion capacitor pack form a dual-power energy source; with the CAN communication based three-mode intelligent control method, appropriate and intelligent control on stages such as charging, starting/braking and normal running is achieved, the energy impact brought by instant large current to the battery pack during frequent starting and braking of a power device is solved, high-efficiency braking energy is recycled, the service lifetime and the running time of the battery pack are prolonged, and the CAN communication based three-mode intelligent control method has favorable practical application value.

Description

technical field [0001] The present invention relates to a three-mode intelligent control method based on CAN communication, specifically the application of a three-mode control technology based on CAN communication in a dual power supply power system composed of a lithium-ion capacitor and an all-solid-state lithium / lithium-ion battery , The system can be applied to power equipment and systems such as intelligent electric vehicles, robots, deep-sea platform power systems, and intelligent drones, and belongs to the field of new energy applications. Background technique [0002] With the strong support of national policies, the new energy power equipment industry has achieved a blowout development, and lithium-ion power batteries have been widely used in pure electric vehicles, deep-sea robots, and intelligent aircraft. Due to the influence of working conditions, each power equipment will frequently start and brake during actual operation. Frequent high current shocks greatly...

AI Technical Summary

Problems solved by technology

Due to the poor high-rate charge and discharge performance of lithium-ion battery packs, only a small amount of braking energy is fed back to the battery pack, and most of them are released as heat. The actual energy recovery efficiency is extremely low, less than 30%. At the same time, frequent starts, During braking, due to frequent instantaneous high-current impacts, the life and running time of lithium-ion battery packs are greatly shortened

Reducing the starting current and slow starting will inevitably delay the starting speed, and the user's instant speed-up experience will become worse; while canceling the energy recovery function will cause more energy loss, which is not in line with the social concept of energy saving and environmental protection of new energy equipment

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