公开(公告)号：EP4297150A1

公开(公告)日：2023-12-27

申请号：EP22831800.2

申请日：2022-06-22

Applicant: BYD Company Limited

Inventor： TANG, Jianglong ,  GUO, Shu ,  LU, Peng ,  LI, Xin

IPC: H01M10/613 ,  H01M10/625

Abstract: A power battery has a box. The box includes a tray, a liquid cooling plate, and a cold expansion portion. An accommodating space for accommodating cells is provided in the tray. The liquid cooling plate is connected to the tray at an outer surface of at least one of the top and bottom of the tray. A flow channel through which a cooling liquid flows is defined jointly by the liquid cooling plate and the outer surface of the tray. The cold expansion portion is arranged in the flow channel, and is connected to at least one of the tray and the liquid cooling plate. A liquid-passing cross-sectional area of the flow channel corresponding to an expansion region is reduced when the cold expansion portion expands.

公开(公告)号：EP4343937A1

公开(公告)日：2024-03-27

申请号：EP22848697.3

申请日：2022-07-29

Applicant: BYD Company Limited

Inventor： GUO, Shu

IPC: H01M50/209 ,  H01M50/244 ,  H01M50/249

Abstract: A charging and swapping system with a detachable battery pack includes a battery pack (1) and a support plate (2). The battery pack (1) includes a casing (11) and a battery unit arranged in the casing (11). The support plate (2) is configured to connect with the battery pack (1) through a detachable connection. The support plate (2) is separated from the battery pack (1) through the detachable connection when the battery pack (1) is to be replaced on a vehicle or when charging of the battery pack at a charging station is completed. Quick disconnection and installation of the battery pack (1) and the support plate (2) are realized through the detachable connection, thereby improving user experience when the vehicle requires battery charging or swapping.

公开(公告)号：EP4333244A1

公开(公告)日：2024-03-06

申请号：EP22848698.1

申请日：2022-07-29

Applicant: BYD Company Limited

Inventor： GUO, Shu

IPC: H02J7/00 ,  H01M10/613 ,  H01M10/615 ,  H01M50/112

Abstract: Disclosed is a battery pack (4) charging system, including a charging base (1) and a cooling structure. The charging base (1) is arranged at a charging station, and the charging base (1) is adapted to be electrically connected to a battery pack (4), so that the battery pack (4) is charged when the battery pack (4) is placed on the charging base (1). The cooling structure is arranged on the charging base (1). By arranging a charging apparatus and charging system that can carry the charging base (1) for the battery pack (4) and charge the battery pack (4) at the charging station, the battery pack (4) is charged without requiring a vehicle to wait for a long time, thereby meeting heating and heat dissipation requirements of the charging system.

公开(公告)号：EP4300659A1

公开(公告)日：2024-01-03

申请号：EP22831632.9

申请日：2022-06-07

Applicant: BYD Company Limited

Inventor： GUO, Shu ,  PENG, Qingbo

IPC: H01M10/613

Abstract: The present disclosure provides a battery cold plate and a battery system. The battery system includes batteries and the battery cold plate. The battery cold plate includes two external interfaces, two convergence pipelines, and multiple branches. The two external interfaces are respectively in communication with the middle positions of the two convergence pipelines, so that the flow path of cooling liquid in the convergence pipeline is enabled to be half of the length of the convergence pipeline, so that the along-the-way flow resistance of the cooling liquid in the convergence pipeline can be reduced. The multiple branches are arranged side by side, and both ends of each of the branches are respectively in communication with the two convergence pipelines through multiple throttling ports. The total cross-sectional area of multiple throttling ports in a branch close to the external interface is less than the total cross-sectional area of multiple throttling ports in a branch away from the external interface, the cross-sectional areas of various sub-branches are the same, the flow resistance of the various branches can be balanced, it is ensured that the flow resistance in the various branches is consistent, and the flow rate of the cooling liquid in the various branches is made to be in balance, further making the temperature of various positions of the cold plate uniform, improving the heat dissipation balance and efficiency and facilitating lowering the demand of the system for the power of a circulation pump, which further reduces the system cost.