US 11,929,634 B2
DC micro-grid system, charging loop circuit and control method thereof
Shiyong Jiang, Guangdong (CN); Xiang Zhang, Guangdong (CN); Chongyang Feng, Guangdong (CN); Ningning Chen, Guangdong (CN); Meng Li, Guangdong (CN); and Yu Zhang, Guangdong (CN)
Assigned to Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
Appl. No. 17/261,916
Filed by Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
PCT Filed Dec. 19, 2018, PCT No. PCT/CN2018/121908
§ 371(c)(1), (2) Date Jan. 21, 2021,
PCT Pub. No. WO2020/019643, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 201810829219.0 (CN), filed on Jul. 25, 2018.
Prior Publication US 2021/0305836 A1, Sep. 30, 2021
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/00714 (2020.01) [H02J 7/0029 (2013.01); H02J 7/007182 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A charging loop circuit, comprising a set of switches and a charging loop, wherein:
the set of switches is electrically connected to the charging loop, a first side loop of a converter and a second side loop of the converter, respectively; and
the charging loop is selectively connected to the first side loop or the second side loop through the set of switches;
wherein the set of switches comprises a switch denoted as KM1, a switch denoted as KM2, a double-throw switch denoted as K1, and a double-throw switch denoted as K2, wherein:
two nodes of the charging loop are electrically connected to a first contact of the double-throw switch denoted as K1 and a second contact of the double-throw switch denoted as K2, respectively;
the switch denoted as KM1 is configured to be connected in series with the first side loop, and an end of the switch denoted as KM1 is electrically connected with a third contact of the double-throw switch denoted as K1, and another end of the switch denoted as KM1 is electrically connected to a fourth contact of the double-throw switch denoted as K2;
the switch denoted as KM2 is configured to be connected in series with the second side loop, and an end of the switch denoted as KM2 is electrically connected with a fifth contact of the double-throw switch denoted as K1, and another end of the switch denoted as KM2 is electrically connected with a sixth contact of the double-throw switch denoted as K2; and
wherein the double-throw switch denoted as K1 is configured to open the first contact from the third contact or close the first contact to the third contact, or, open the first contact from the fifth contact or close the first contact to the fifth contact; and the double-throw switch denoted as K2 is configured to open the second contact from the fourth contact or close the second contact to the fourth contact, or, open the second contact from the sixth contact or close the second contact to the sixth contact.