Management system applied to lithium ion battery and lithium ion battery pack

Abstract

The invention provides a management system applied to a lithium ion battery and a lithium ion battery pack. The management system comprises the single lithium ion battery or the lithium ion battery pack and an external power supply. A two-wire system is adopted by an external interface of the system, namely an external power supply charging interface of the system is a system discharge interface, and the lithium ion battery or the lithium ion battery pack is charged on the condition that an external power supply of the system is lower than rated voltage. When the external power supply is insufficient to enable the lithium ion battery or the lithium ion battery pack to be fully charged and on the condition that a charge-discharge interface is of the two-wire system, the lithium ion battery or the lithium ion battery pack can be fully charged through the management system. Meanwhile, the hardware switching is adopted in conversion of charging to discharging, the conversion time is at a subtle level, and seamless standby power of a standby power system can be achieved. In addition, the conversion of discharging to charging is achieved by logic control of a controller, and accordingly the charging efficiency is guaranteed.

Description

technical field [0001] The invention relates to a management system of a lithium ion battery and a lithium ion battery pack, in particular to a charging and discharging control system in the management system. Background technique [0002] Along with the rapid development of the entire telecommunication business, various technologies applied to the telecommunication network emerge in endlessly. Optical communication technology has always been one of the focuses of the entire communication field. Similarly, with the rapid growth of broadband users, at the access network level, compared with the traditional copper wire access technology, optical fiber access has the advantages of wide coverage, long transmission distance, high bandwidth, security, and low construction and maintenance costs. "Light advances and copper retreats" has become an inevitable choice. In this process, the power supply problem has become one of the key issues affecting the quality of optical communica...

AI Technical Summary

Problems solved by technology

[0003] The traditional backup power supply for communication equipment is lead-acid battery, but lead-acid battery has its inherent disadvantages: pollution, large size, high maintenance cost, and it has become a trend to be replaced by low-carbon and environmentally friendly lithium-ion batteries

[0005] However, if the external power supply is boosted by a BOOST circuit (that is, a switch-type DC boost circuit), the voltage to the battery terminal must be higher than the charging power supply voltage. At this time, if the discharge circuit is turned on, the battery terminal voltage will be directly fed back to the charger At the power supply end, the circuit will not work normally; similarly, when the backup power supply is discharging, if the BOOST circuit is working, the voltage to the load end will also be boosted by the BOOST circuit, resulting in abnormal discharge

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