US 12,263,749 B2
Battery system of vehicle, charging and discharging method, and vehicle
Guanfeng Jiang, Zhejiang (CN); Bin Wang, Zhejiang (CN); and Tao Sui, Zhejiang (CN)
Assigned to WUHAN LOTUS CARS CO., LTD., Wuhan (CN)
Appl. No. 17/616,182
Filed by WUHAN LOTUS CARS CO., LTD., Hubei (CN)
PCT Filed May 29, 2020, PCT No. PCT/CN2020/093411
§ 371(c)(1), (2) Date Dec. 2, 2021,
PCT Pub. No. WO2020/244465, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 201910477476.7 (CN), filed on Jun. 3, 2019.
Prior Publication US 2022/0314833 A1, Oct. 6, 2022
Int. Cl. H02J 7/00 (2006.01); B60L 3/00 (2019.01); B60L 53/66 (2019.01); B60L 58/12 (2019.01); B60L 58/18 (2019.01); B60L 58/19 (2019.01)
CPC B60L 53/66 (2019.02) [B60L 3/0046 (2013.01); B60L 58/12 (2019.02); B60L 58/18 (2019.02); B60L 58/19 (2019.02); H02J 7/0024 (2013.01); H02J 7/0048 (2020.01); H02J 7/007 (2013.01); B60L 2240/547 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A battery system of a vehicle, comprising an energy storage apparatus (1) and a direct current (DC) charging and discharging interface (2) that are connected to each other, wherein
the energy storage apparatus (1) comprises at least a first battery pack (17) and a second battery pack (18), and an inter-battery switch is disposed between adjacent battery packs; and
a first electrode of the DC charging and discharging interface (2) is separately connected to a first electrode of the energy storage apparatus (1) and one terminal of the inter-battery switch, and a second electrode of the DC charging and discharging interface (2) is separately connected to a second electrode of the energy storage apparatus (1) and another terminal of the inter-battery switch;
wherein the inter-battery switch comprises a first inter-battery switch (11) and a second inter-battery switch (12); and
an incoming line terminal (111) of the first inter-battery switch (11) is connected to a first electrode of the first battery pack (17), a first outgoing line terminal (112) of the first inter-battery switch (11) is connected to the first electrode of the DC charging and discharging interface (2), and a second outgoing line terminal (113) of the first inter-battery switch (11) is connected to a first outgoing line terminal (112) of the second inter-battery switch (12); and a second outgoing line terminal (113) of the second inter-battery switch (12) is connected to the second electrode of the DC charging and discharging interface (2), and an incoming line terminal (111) of the second inter-battery switch (12) is connected to a second electrode of the second battery pack (18);
wherein the battery system further comprises a first relay (13),
one terminal of the first relay (13) is connected to the second electrode of the DC charging and discharging interface (2), and the other terminal of the first relay (13) is separately connected to the second electrode of the energy storage apparatus (1) and a second outgoing line terminal (113) of the second inter-battery switch (12) of each battery pack; or
one terminal of the first relay (13) is separately connected to the second electrode of the DC charging and discharging interface (2) and a second outgoing line terminal (113) of the second inter-battery switch (12) of each battery pack, and the other terminal of the first relay (13) is connected to the second electrode of the energy storage apparatus (1);
wherein the battery system further comprises a second relay (14),
one terminal of the second relay (14) is connected to the first electrode of the DC charging and discharging interface (2), and the other terminal of the second relay (14) is separately connected to the first electrode of the energy storage apparatus (1) and a first outgoing line terminal (112) of the first inter-battery switch (11) of each battery pack; or
one terminal of the second relay (14) is separately connected to the first electrode of the DC charging and discharging interface (2) and a first outgoing line terminal (112) of the first inter-battery switch (11) of each battery pack, and the other terminal of the second relay (14) is connected to the first electrode of the energy storage apparatus (1);
wherein the battery system further comprises a third relay (15),
one terminal of the third relay (15) is connected to one terminal of the second relay (14), and the other terminal of the third relay (15) is connected to the first outgoing line terminal (112) of the first inter-battery switch (11); or
one terminal of the third relay (15) is connected to the other terminal of the second relay (14), and the other terminal of the third relay (15) is connected to the first outgoing line terminal (112) of the first inter-battery switch (11);
wherein the battery system further comprises a fourth relay (16),
one terminal of the fourth relay (16) is connected to one terminal of the first relay (13), and the other terminal of the fourth relay (16) is connected to the second outgoing line terminal (113) of the second inter-battery switch (12); or
one terminal of the fourth relay (16) is connected to the other terminal of the first relay (13), and the other terminal of the fourth relay (16) is connected to the second outgoing line terminal (113) of the second inter-battery switch (12);
wherein the DC charging and discharging interface (2) comprises a discharging interface and a charging interface;
a first electrode of the discharging interface is connected to a first electrode of the charging interface; and
a second electrode of the discharging interface is connected to a second electrode of the charging interface;
wherein the DC charging and discharging interface (2) further comprises a fifth relay (21); and
one terminal of the fifth relay (21) is connected to the second electrode of the charging interface, and the other terminal of the fifth relay (21) is separately connected to the second electrode of the discharging interface and the second electrode of the energy storage apparatus (1).