公开(公告)号：EP4050709A1

公开(公告)日：2022-08-31

申请号：EP20890023.3

申请日：2020-11-18

Applicant: BYD Company Limited

Inventor： ZHU, Jianhua ,  ZHU, Yan ,  DENG, Dongjun

IPC: H01M50/112 ,  H01M50/10

Abstract: A battery, a battery module, a battery pack, and an electric vehicle. The battery includes a housing, end covers, partition plates, and a number of electrode core assemblies. The end covers are arranged on two opposite ends of the housing for sealing an internal space of the housing. The partition plates are spaced apart from each other in the housing for separating the internal space of the housing into a number of accommodating cavities successively arranged along a first direction. Each electrode core assembly is arranged in each accommodating cavity. The electrode core assembly includes at least one electrode core. The number of electrode core assemblies are successively arranged along the first direction and connected in series. The partition plate is provided with an electrolyte solution filling channel. The electrolyte solution filling channel is in communication with the accommodating cavity on at least one side of the partition plate, and is configured for electrolyte solution to be injected into the accommodating cavity from an outside of the battery. The electrolyte solution filling channel is in a closed state upon completion of the electrolyte solution filling, to prevent communication between the accommodating cavity and the outside of the battery. A through hole is provided at a position of the housing corresponding to the electrolyte solution filling channel on the partition plate.

公开(公告)号：EP4050689A1

公开(公告)日：2022-08-31

申请号：EP20890373.2

申请日：2020-11-19

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  LU, Zhipei ,  ZHU, Yan ,  HU, Shichao

IPC: H01M10/04

Abstract: The present disclosure provides a battery, including: a housing (10); a plurality of accommodating cavities (60) arranged in the housing; a partition plate (20) for separating two adjacent accommodating cavities (60); an electrode core assembly (30), received in one of the accommodating cavities (60), the electrode core assembly (30) including at least one electrode core, and a plurality of electrode core assemblies (30) being sequentially arranged in a first direction and connected in series; a plurality of sampling wires, electrically connected to the plurality of electrode core assemblies (30) correspondingly; and a wire harness channel, receiving the plurality of sampling wires. A battery module, a battery pack, and an electric vehicle are further provided.

公开(公告)号：EP3996192A1

公开(公告)日：2022-05-11

申请号：EP20834638.7

申请日：2020-07-03

Applicant: BYD Company Limited

Inventor： PAN, Yi ,  BAI, Li ,  PAN, Zeng ,  ZHU, Yan ,  ZHANG, Meng

IPC: H01M50/409

Abstract: An adhesive-coated separator for a lithium-ion battery, a preparation method thereof, and use thereof are disclosed. The adhesive-coated separator for a lithium-ion battery of the present disclosure includes a base membrane and an adhesive coating formed on a surface of the base membrane, the thickness deviation percentage of the adhesive coating is less than or equal to 10%, the thickness deviation percentage = (D max - D min )/D ave × 100%, D max is a maximum value of the thickness of the adhesive coating, D min is a minimum value of the thickness of the adhesive coating, and D ave is an average value of the thickness of the adhesive coating.

公开(公告)号：EP3955338A1

公开(公告)日：2022-02-16

申请号：EP21190525.2

申请日：2021-08-10

Applicant: BYD Company Limited

Inventor： CHEN, Na ,  RUAN, Zewen ,  ZHU, Yan ,  HAO, Rong ,  PAN, Yi

IPC: H01M4/131

Abstract: The present invention discloses a composite cathode material, a cathode plate and a preparation method thereof, and a battery. The composite cathode material comprises a ternary material and a phase-transition material. The phase-transition material undergoes phase transition in the charge/discharge interval of the ternary material. The ternary material has a single crystal structure, the phase-transition material has a single crystal structure or a poly-crystalline structure, and the phase-transition material is coated on the surface of the ternary material. The weight ratio of the ternary material to the phase-transition material is 80:20-99.8:0.2. The ternary material has a nanohardness of 0.001-5 Gpa, and the phase-transition material has a nanohardness of 0.01-10 GPa. According to the embodiment of the present invention, the cycle performance of the battery is improved, the impedance increase of the material during the aging process is reduced, and the safety of the battery is improved.

公开(公告)号：EP3477734A1

公开(公告)日：2019-05-01

申请号：EP17833515.4

申请日：2017-07-24

Applicant: BYD Company Limited

Inventor： JIANG, Luxia ,  HU, Shichao ,  YANG, Keli ,  CHENG, Han ,  ZHU, Jianhua ,  ZHU, Yan

IPC: H01M2/12

Abstract: The present disclosure provides a compound explosion-proof valve mounted on a battery cover plate assembly, a cover plate assembly containing the explosion-proof valve, and a battery. The compound explosion-proof valve includes at least two layers of explosion-proof membranes and a flame-retardant structure located between the at least two layers of explosion-proof membranes. When the battery (such as internal temperature or internal pressure) is abnormal, the first layer of explosion-proof membrane is opened; under the action of the flame-retardant structure, the compound explosion-proof valve is in a local oxygen-deficient state, and it is difficult for a high-temperature combustible matter ejected from the battery to ignite under the local oxygen-deficient condition; therefore, the compound explosion-proof valve is capable of reliving pressure in time when the battery is abnormal and effectively isolating external oxygen from entering, thereby preventing occurrence of battery combustion and explosion and avoiding secondary disasters and larger abnormity.

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：EP3422441A1

公开(公告)日：2019-01-02

申请号：EP16891202.0

申请日：2016-08-30

Applicant: BYD Company Limited

Inventor： HU, Shichao ,  ZHU, Yan

IPC: H01M2/34 ,  H01M10/44

Abstract: The present invention relates to the field of batteries, and in particular, to a single cell, a battery module, a battery pack, and an electric vehicle. The single cell includes a case, a battery cell, an electrode terminal, and a cover plate. The electrode terminal includes a battery post. The single cell further includes a current interrupt device electrically connected to the electrode terminal. The current interrupt device has a conductive member and a flipping member connected to the conductive member for mutual electrical connection. The conductive member is connected to an outer end surface of the battery post. A ceramic ring is tightly connected between an outer periphery of the flipping member and the cover plate. The outer periphery of the flipping member is tightly connected to an outer end surface of the ceramic ring. An outer periphery of the battery post is connected to an inner end surface of the ceramic ring. The battery post is insulated from the outer periphery of the flipping member by using the ceramic ring. This can withstand passing through of a high current, and when the battery is overcharged (or when an emergency situation of charging/discharging the battery occurs), a circuit can be forcibly disconnected, to prevent a danger such as a battery explosion from occurring.

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：EP3360195A1

公开(公告)日：2018-08-15

申请号：EP16867942.1

申请日：2016-11-21

Applicant: BYD Company Limited

Inventor： LIU, Desheng ,  PENG, Qingbo ,  ZHENG, Weixin ,  ZHU, Jianhua ,  ZHU, Yan

IPC: H01M10/613

CPC classification number: H01M10/613 ,  B60L11/1874 ,  B60L11/1879 ,  B60L2240/549 ,  H01M2/1077 ,  H01M10/625 ,  H01M10/6552 ,  H01M10/6554 ,  H01M10/6556 ,  H01M10/6567 ,  H01M2220/20 ,  Y02T10/7005 ,  Y02T10/705 ,  Y02T90/16

Abstract: A power battery pack and an electrical vehicle including the same are provided. The power battery pack includes: a tray; a plurality of battery modules disposed in the tray, and including a first battery module disposed on the tray and a second battery module stacked on the first battery module; a second module cooling plate disposed outside of the second battery module, and including a first bottom plate and a first side plate; and a first side heat-conducting plate disposed at an outer side of the first side plate and heat-conductively connected therewith, wherein both the first bottom plate and the first side plate have a heat pipe disposed therein respectively, the heat pipes of the first bottom plate and the first side plate are in communication with each other; and the first side heat-conducting plate has a heat pipe disposed therein and heat-conductively connected to the tray.

公开(公告)号：EP3063804B1

公开(公告)日：2017-10-25

申请号：EP14876582.9

申请日：2014-12-29

Applicant: BYD Company Limited

Inventor： ZHU, Yan ,  PENG, Qingbo ,  LU, Jia ,  ZHANG, Xuefeng ,  LIU, Wei ,  HUANG, Yan ,  LU, Zhipei ,  ZHU, Jianhua

IPC: H01M2/10 ,  H01M2/24 ,  H01M2/20 ,  H01M10/48 ,  H01M10/42

CPC classification number: H01M2/1077 ,  H01M2/202 ,  H01M2/206 ,  H01M10/425 ,  H01M10/48 ,  H01M10/482 ,  H01M2010/4271 ,  H01M2010/4278 ,  H01M2220/20

Abstract: A power battery module includes a battery accommodating assembly having a plurality of separators, the separator comprising: a separator body; a left cover; and a right cover, in which adjacent separators are detachably connected with each other; a battery group; a power connection member, a line snap-fit, a power connection line and a signal collection assembly.