US 12,230,991 B2
Charging device
Quanfu Zou, Huizhou (CN); and Fangzheng Kou, Huizhou (CN)
Assigned to RoyPow Technology Co., Ltd., Huizhou (CN)
Filed by RoyPow Technology Co., Ltd., Guangdong (CN)
Filed on Apr. 25, 2022, as Appl. No. 17/728,711.
Claims priority of application No. 202111166165.2 (CN), filed on Sep. 30, 2021.
Prior Publication US 2023/0103028 A1, Mar. 30, 2023
Int. Cl. H02J 7/00 (2006.01); H02J 7/02 (2016.01); H02M 3/335 (2006.01); H02M 3/00 (2006.01)
CPC H02J 7/007 (2013.01) [H02J 7/00304 (2020.01); H02J 7/02 (2013.01); H02M 3/33576 (2013.01); H02J 2207/20 (2020.01); H02M 3/01 (2021.05)] 10 Claims
OG exemplary drawing
 
1. A charging device, comprising:
an LLC half-bridge resonant power supply, an input end of the LLC half-bridge resonant power supply being configured to be connected to a power supply, an output end of the LLC half-bridge resonant power supply being connected to an input end of a first switch in a normally open state, and an output end of the first switch being configured to be connected to a battery to be charged,
a charging interface configured to be connected to the battery to be charged, and provided with an engage-enabled pin and a charge-enabled pin, the length of the charge-enabled pin being smaller than the length of a communication-enabled pin and the engage-enabled pin, respectively, and
a charging management circuit, a first end of the charging management circuit being connected to an end of the engage-enabled pin, a second end of the charging management circuit being connected to an end of the charge-enabled pin, a third end of the charging management circuit being connected to a controlled end of the first switch, and a fourth end of the charging management circuit being connected to a burst mode operation threshold setting end of the LLC half-bridge resonant power supply;
wherein the charging management circuit is configured to control the LLC half-bridge resonant power supply to soft start when the battery to be charged is in contact with the engage-enabled pin during a process of plugging the charging interface into the battery to be charged; the charging management circuit is further configured to control the first switch to be turned on when another end of the charge-enabled pin of the charging interface is in contact with the battery to be charged, to cause the LLC half-bridge resonant power supply to charge the battery to be charged; and
the charging management circuit is configured to control a primary side of the LLC half-bridge resonant power supply to stop operating when the charge-enabled pin is disconnected from the battery to be charged during a process of unplugging the charging interface from the battery to be charged.