CHARGING/DISCHARGING APPARATUS, BATTERY CHARGING AND DISCHARGING METHOD, AND CHARGING/DISCHARGING SYSTEM

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CHARGING/DISCHARGING APPARATUS, BATTERY CHARGING AND DISCHARGING METHOD, AND CHARGING/DISCHARGING SYSTEM

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GAO JINFENG / QI CHEN / ZUO XIYANG / HUANG XIAOJIAN

Embodiments of the present application provide a charging and discharging device, which can improve the charging efficiency of a battery. The charging and discharging device includes an AC/DC converter, a first DC/DC converter, a second DC/DC converter and a control unit, where one end of the second DC/DC converter is connected between the first DC/DC converter and the AC/DC converter and the other end of the second DC/DC converter is connected to an energy storage unit. The control unit is used to: receive a first charging request transmitted by BMS, the first charging request including a first charging voltage and a first charging current; set output power of the first DC/DC converter based on the first charging voltage and the first charging current; turn on the second DC/DC converter if an SOC of the energy storage unit is greater than a first threshold to charge the battery by the energy storage unit through the first DC/DC converter and the second DC/DC converter; and adjust output power of the second DC/DC converter if a bus voltage is less than a bus balance voltage of the charging and discharging device and a voltage difference between the bus voltage and the bus balance voltage exceeds a preset value in the process of charging the battery by the energy storage unit, so as to enable the voltage difference to be less than or equal to the preset value.

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Title :

CHARGING/DISCHARGING APPARATUS, BATTERY CHARGING AND DISCHARGING METHOD, AND CHARGING/DISCHARGING SYSTEM

Additional title:

LADE-/ENTLADEVORRICHTUNG, BATTERIELADE- UND ENTLADEVERFAHREN UND LADE-/ENTLADESYSTEM
APPAREIL DE CHARGE/DÉCHARGE, PROCÉDÉ DE CHARGE ET DE DÉCHARGE DE BATTERIE, ET SYSTÈME DE CHARGE/DÉCHARGE

Contributors:

GAO JINFENG (author) / QI CHEN (author) / ZUO XIYANG (author) / HUANG XIAOJIAN (author)

Publication date :

2024-04-17

Type of media :

Patent

Type of material :

Electronic Resource

Language :

English

Classification :

IPC:

H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen