公开(公告)号：EP4068496A1

公开(公告)日：2022-10-05

申请号：EP20907650.4

申请日：2020-10-23

Applicant: BYD Company Limited

Inventor： LU, Peng ,  LU, Zhipei ,  WANG, Xinyue ,  DENG, Dongjun ,  ZHU, Yan

IPC: H01M50/572

Abstract: A cover plate assembly, a battery, a battery module, a power battery pack, and an electric vehicle are disclosed. The cover plate assembly includes a cover plate body (1), a first electrode terminal (2), a second electrode terminal, and a resistive coating (3). The second electrode terminal is insulatively connected with the cover plate body (1). The first electrode terminal (2) is electrically connected with the cover plate body (1) by the resistive coating (3). The resistive coating (3) includes a weak portion (331). When a current flowing through the resistive coating (3) is greater than a predetermined threshold, the weak portion (331) is melted to disconnect the cover plate body (1) from the first electrode terminal (2).

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：EP4439853A1

公开(公告)日：2024-10-02

申请号：EP22929658.7

申请日：2022-12-26

Applicant: BYD Company Limited

Inventor： CHEN, Weijia ,  LU, Peng ,  WAN, Long ,  PENG, Qingbo ,  ZHU, Liequn

IPC: H01M50/569

CPC classification number: Y02E60/10 ,  H01M50/249 ,  H01M50/519 ,  H01M50/284 ,  H01M50/503 ,  H01M50/569

Abstract: A battery cell assembly, a battery pack, and a vehicle are provided. The battery cell assembly includes at least two battery cells, a battery cell bracket, a flexible circuit board, and a connecting sheet. The at least two battery cells are disposed in a butt joint mode along the length direction of the battery cells. The battery cell bracket is connected at a junction position between adjacent battery cells. The flexible circuit board is disposed on the top surface of the battery cell. The connecting sheet is fixed on the battery cell bracket, the connecting sheet is connected to tabs of the battery cells and the flexible circuit board, the connecting sheet has a sampling section, and the sampling section is located on the top surfaces of the battery cells and is configured to be connected to an external sampling device to sample the battery cells.

公开(公告)号：EP4228052A1

公开(公告)日：2023-08-16

申请号：EP21908440.7

申请日：2021-05-08

Applicant: BYD Company Limited

Inventor： LU, Peng ,  PENG, Qingbo ,  ZHENG, Weixin

IPC: H01M10/42 ,  H01M10/48 ,  G01M3/16

Abstract: A battery pack, a method for controlling a battery pack, and a vehicle. The battery pack includes a control module (101), a battery core (102), a liquid leakage detection module (103), and a pre-charge switch module (104). The liquid leakage detection module (103) is connected with the control module (101), and the liquid leakage detection module (103) is configured to send a liquid leakage signal to the control module (101) when detecting that liquid leakage occurs in the battery core (102). The control module (101) is configured to prohibit sending a pre-charge on signal to the pre-charge switch module (104) upon receiving the liquid leakage signal while receiving a start signal for starting the battery core (102). The pre-charge switch module (104) is configured to prohibit connection of the pre-charge voltage end and the power output end when not receiving the pre-charge on signal, to prohibit the battery core (102) from outputting a pre-charge voltage through the power output end.

公开(公告)号：EP4300685A1

公开(公告)日：2024-01-03

申请号：EP22831727.7

申请日：2022-06-17

Applicant: BYD Company Limited

Inventor： LU, Peng ,  PENG, Qingbo ,  LU, Zhipei

IPC: H01M50/244

Abstract: Provided are a battery pack using a method for assembling a battery pack and a vehicle. The battery pack includes a box and battery modules. The box is provided with cavities inside. The battery module includes foam and multiple cells. The foam is arranged between adjacent cells. The method for assembling a battery pack includes the following steps: the battery module is loaded into an insulating bag; the insulating bag is vacuumized so that the foam is compressed to reduce the volume of the battery module; and after the battery module of the reduced volume is inserted into the cavity, a vacuum state is released and positive and negative electrodes of the battery module are exposed.

公开(公告)号：EP3726618A1

公开(公告)日：2020-10-21

申请号：EP18887235.2

申请日：2018-12-13

Applicant: BYD Company Limited

Inventor： JIANG, Luxia ,  HU, Shichao ,  LU, Peng ,  WANG, Xinyue ,  WANG, Feifei

IPC: H01M2/20

Abstract: A battery cover plate assembly, a cell, battery module, a power battery, and an electric vehicle are provided. The battery cover plate assembly includes a cover plate (110), an inner electrode terminal (109), and an outer electrode terminal (112). The inner electrode terminal (109) and the outer electrode terminal (112) are electrically connected by using a current interrupt device. The current interrupt device includes a score member (101) and a flipping member (102). The flipping member (102) is electrically connected to the score member (101). In addition, the flipping member (102) can act under an effect of air pressure to break a score (104) on the score member (101). The flipping member (102) forms an elongated structure extending along the cover plate.

公开(公告)号：EP3648193A1

公开(公告)日：2020-05-06

申请号：EP18824999.9

申请日：2018-05-28

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  JIANG, Luxia ,  HU, Shichao ,  LU, Peng ,  CHENG, Han ,  YANG, Keli

IPC: H01M2/04 ,  H01M2/34 ,  H01M2/26 ,  H01M10/04

Abstract: A battery cover plate assembly, a single battery, a battery module, a power battery pack, and an electric vehicle are provided. The battery cover plate assembly includes a cover plate, an electrode terminal, a current interrupt structure, and an arc extinguishing portion. The electrode terminal is disposed on the cover plate and includes an electrode inner terminal and an electrode outer terminal. The electrode inner terminal and the electrode outer terminal are electrically connected through the current interrupt structure. The current interrupt structure is capable of disrupting the electrical connection between the electrode inner terminal and the electrode outer terminal under the action of a gas pressure. The arc extinguishing portion is configured to at least reduce an electric arc generated when the current interrupt structure disrupts the electrical connection between the electrode inner terminal and the electrode outer terminal. When the electrical connection between the electrode inner terminal and the electrode outer terminal is disrupted, an arcing effect is generated due to high voltages at positive and negative electrodes of the battery. In this case, the arc extinguishing portion at least reduces the electric arc, so that gas between two disconnected structure members in the battery cover plate assembly is not easy to be broken down, thereby avoiding dangerous accidents such as battery burning and explosion and improving safety performance of the battery.

公开(公告)号：EP3477733A1

公开(公告)日：2019-05-01

申请号：EP17833514.7

申请日：2017-07-24

Applicant: BYD Company Limited

Inventor： JIANG, Luxia ,  HU, Shichao ,  LU, Peng ,  WANG, Xinyue ,  ZHU, Jianhua ,  ZHU, Yan

IPC: H01M2/12

Abstract: The present disclosure provides an explosion-proof valve, a cover plate assembly, and a battery. The explosion-proof valve includes a base body and an explosion-proof membrane, where the explosion-proof membrane includes a welding portion at a peripheral edge and an opening portion in the middle; the opening portion of the explosion-proof membrane is provided with an explosion-proof notch; and a flexible buffer structure is further disposed between the explosion-proof notch and a welding seam between the welding portion and the base body.

公开(公告)号：EP3422440A1

公开(公告)日：2019-01-02

申请号：EP16891201.2

申请日：2016-08-30

Applicant: BYD Company Limited

Inventor： LU, Peng ,  JIANG, Luxia ,  HU, Shichao ,  ZHU, Jianhua ,  ZHU, Yan

IPC: H01M2/34 ,  H01M2/12

Abstract: The present invention discloses a single cell, a battery module, a power battery, and an electric vehicle. The single cell (4100) includes a case, a battery cell accommodated in the case, an electrode terminal (4101) electrically connected to the battery cell, and a cover plate (4102) for encapsulating the case. The electrode terminal (4101) is disposed in the cover plate (4102). The electrode terminal includes a battery post (4104) passing through the cover plate (4102) and electrically connected to the battery cell by using an internal guide member (4196). The single cell further includes a current interrupt device (4200) mounted in the battery post (4104). The current interrupt device (4200) has a flipping member (4202) in communication with gas inside the case. The flipping member (4202) is connected to an outer end surface of the battery post (4104) by using a connection point. The connection point can be disconnected under action of air pressure.

公开(公告)号：EP4145607A1

公开(公告)日：2023-03-08

申请号：EP21824960.5

申请日：2021-04-22

Applicant: BYD Company Limited

Inventor： TAN, Liangwen ,  LU, Peng ,  SONG, Na ,  TAN, Jing ,  CHEN, Wenhui

IPC: H01M50/209 ,  H01M50/249

Abstract: A battery pack includes a tray (10), multiple batteries (20), a distribution box (30), and a sealing plate (40). An accommodating space (50) is formed in the tray (10). Multiple batteries (20) and the distribution box (30) are both accommodated in the accommodating space (50). The multiple batteries (20) are all electrically connected to the distribution box (30). The tray (10) includes a bottom plate (101). An access port (101a) in communication with the accommodating space (50) is provided in the bottom plate (101). The access port (101a) is provided opposite to the distribution box (30). The sealing plate (40) seals the access port (101a). The sealing plate (40) is detachably connected to the bottom plate (101).