Lithium battery replacing lead-acid battery intelligent BMS architecture and use method

Abstract

The invention discloses an intelligent BMS structure of lithium battery replacing lead acid battery, which comprises a central processing unit, a collection device, a startup and electric quantity display unit and an electric quantity conversion unit, which are respectively bidirectionally connected with the central processing unit. The collecting unit collects and processes the battery pack unitvoltage, current, temperature and insulation parameters of the battery pack, and uploads them to the central processing unit for data processing. The startup and electric quantity display unit is provided with an auxiliary switch for controlling the closing and opening of the switch unit of the battery pack. The electric quantity conversion unit causes the whole vehicle to accept and display the correct electric quantity value; The switch used in the switch unit of the battery pack is a relay switch. The invention is more suitable for the working condition of high load and high current of theelectric energy demand terminal, and ensures low power consumption, safety and stable operation. The invention provides a method for converting the electric quantity display so as to realize that theelectric quantity can be displayed correctly after the electric energy demand end of the lead-acid battery of the original device is replaced by the lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium battery safety protection, in particular to a method and device for improving the discharge capacity of the lithium battery and correctly displaying the power when the lead-acid battery is replaced with a lithium battery at an electric energy demand end (such as an electric forklift, AGV, etc.). Background technique [0002] Due to its mature technology, stable performance and high safety, lead-acid batteries are widely used as power sources for power demand (such as electric forklifts, AGVs, etc.). However, due to the improper handling of lead-acid batteries during the production process or after they are discarded, it is easy to cause environmental pollution. After the existing lead-acid batteries at the power demand end reach the end of their life, it has become the mainstream to replace them with lithium batteries with higher energy density and pollution-free. [0003] The traditional replacem...

AI Technical Summary

Problems solved by technology

[0003] The traditional replacement method is mainly to use lithium batteries to form a battery pack with a similar voltage, and lead out the positive and negative electrodes for charging and discharging. Due to the long-term standby power consumption problem, MOS is used internally for over-current protection, instead of using higher current-resistant of the relay, reducing the discharge capacity of the battery pack

In addition, after the battery pack of the lithium battery is replaced, an additional external meter is required to display the power display, and the original meter on the power demand side cannot display the power normally.

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