US 12,266,964 B2
Charging-and-discharging apparatus, method for charging a battery and charging-and-discharging system
Xiyang Zuo, Ningde (CN); Yu Yan, Ningde (CN); and Jinfeng Gao, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 29, 2021, as Appl. No. 17/565,044.
Application 17/565,044 is a continuation of application No. PCT/CN2021/109373, filed on Jul. 29, 2021.
Prior Publication US 2023/0036620 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); B60L 50/60 (2019.01); B60L 58/12 (2019.01); H01M 10/42 (2006.01); B60L 55/00 (2019.01); B60L 58/13 (2019.01); H02J 3/32 (2006.01)
CPC H02J 7/00714 (2020.01) [B60L 50/60 (2019.02); B60L 58/12 (2019.02); H01M 10/425 (2013.01); H02J 7/0048 (2020.01); B60L 55/00 (2019.02); B60L 58/13 (2019.02); B60L 2210/10 (2013.01); B60L 2210/30 (2013.01); H01M 2010/4271 (2013.01); H02J 3/322 (2020.01); H02J 7/0069 (2020.01); H02J 7/0071 (2020.01); H02J 7/00712 (2020.01); H02J 2207/20 (2020.01)] 17 Claims
OG exemplary drawing
 
1. A charging-and-discharging apparatus, comprising a bidirectional alternating current/direct current (AC/DC) converter, a first direct current/direct current (DC/DC) converter, and a control unit, wherein the first DC/DC converter is a bidirectional DC/DC converter;
wherein the control unit is configured to:
receive a first charging current, a first discharging current and a second charging current sent by a battery management system (BMS) of a battery in sequence, wherein
when the first charging current is received, control the bidirectional AC/DC converter and the first DC/DC converter according to the first charging current to charge the battery through an AC power;
when the first discharging current is received, discharge a power of the battery according to the first discharging current, wherein the first discharging current is a discharging current sent by the BMS when a first accumulative charging amount of the battery is greater than or equal to a first accumulative charging amount threshold and a voltage of a battery cell of the battery does not exceed a full-charging voltage of the battery cell; and
when the second charging current is received, control the bidirectional AC/DC converter and the first DC/DC converter according to the second charging current to charge the battery through the AC power, wherein the second charging current is a charging current sent by the BMS when a first accumulative discharging amount of the battery is greater than or equal to a first accumulative discharging amount threshold;
wherein the charging-and-discharging apparatus further comprises a second DC/DC converter, one end of the second DC/DC converter is connected between the first DC/DC converter, and the battery and the other end of the second DC/DC converter is connected to an energy storage unit; and
wherein the control unit is specifically configured to:
control the bidirectional AC/DC converter and the first DC/DC converter according to the first discharging current to discharge the power of the battery to the AC power; and
control the second DC/DC converter to simultaneously discharge the power of the battery to the energy storage unit.