公开(公告)号：EP4138208A1

公开(公告)日：2023-02-22

申请号：EP21808673.4

申请日：2021-05-12

Applicant: BYD Company Limited

Inventor： HU, Shichao ,  CHENG, Han

IPC: H01M50/593 ,  H01M50/103

Abstract: An electrode core assembly is provided, which includes an encapsulation film (11), an electrode core (12) and an spacer ring (13). The electrode core (12) and the spacer ring (13) are both arranged in an accommodating cavity defined by the encapsulation film (11). The electrode core (12) includes an electrode core body (121) and two electrode lead-out members of opposite polarities that are electrically connected to the electrode core body. The length of the electrode core body (121) extends along a first direction. Two opposite ends of the electrode core body (121) in the first direction include a V-shaped end face (1211) with a tip and protruding outward from the electrode core body (121), and the positions where the two electrode lead-out members are connected to the electrode core body (121) are respectively located at the tips of the two V-shaped end faces (1211). The spacer ring (13) includes an inclined portion (131) on the V-shaped end face (1211), and the inclined portion (131) is provided with an electrode lead-out hole (1310) penetrating through the spacer ring (13) and configured to lead out the electrode lead-out member.

公开(公告)号：EP4525195A1

公开(公告)日：2025-03-19

申请号：EP23802571.2

申请日：2023-04-12

Applicant: BYD Company Limited

Inventor： YUAN, Wansong ,  WANG, Xinyue ,  CHENG, Han ,  PAN, Qiu

IPC: H01M50/533

Abstract: A battery, a battery pack, and a vehicle. The battery comprises: a battery casing; a pole core, arranged in the battery casing; and a positive electrode lead-out piece and a negative electrode lead-out piece, the positive electrode lead-out piece comprising a positive-electrode first connecting sheet, the negative electrode lead-out piece comprising a negative-electrode first connecting sheet, and the positive-electrode first connecting sheet and the negative-electrode first connecting sheet being distributed at two opposite ends of the pole core in the length direction of the battery casing. The distance between the positive-electrode first connecting sheet and the negative-electrode first connecting sheet in the length direction of the battery casing is L1, the size of the battery in the length direction of the battery casing is L, and L1 and L meet: 0.95 ≤ L1/L ≤ 0.99.

公开(公告)号：EP3770995A1

公开(公告)日：2021-01-27

申请号：EP19772632.6

申请日：2019-01-22

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  CHENG, Han ,  YANG, Keli ,  JIANG, Luxia ,  PENG, Lingyi

IPC: H01M2/26

Abstract: A cell, a battery module, a power battery, and an electric vehicle are provided. The cell according to an embodiment of the present disclosure includes: a housing; a cover plate located at an end of the housing; a pole core located in the housing and having an electrode tab; an inner spacer including a bottom plate, a connecting plate, and a support plate, where the bottom plate is disposed on a surface of the pole core facing the cover plate, one end of the connecting plate is connected to a side edge of the bottom plate and is formed in a bent shape with a side edge of the bottom plate, the other end of the connecting plate is connected to the support plate and is formed in a bent shape with the support plate, and the support plate extends toward a direction away from the bottom plate, a part of the electrode tab extending from a side surface of the support plate facing the pole core to a side surface away from the pole core; and a conductive terminal disposed on the cover plate and electrically connected to the electrode tab.

公开(公告)号：EP4525167A1

公开(公告)日：2025-03-19

申请号：EP23802600.9

申请日：2023-04-19

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  YUAN, Wansong ,  CHENG, Han ,  PAN, Qiu ,  LI, Kai

IPC: H01M50/342 ,  H01M50/249 ,  H01M50/258

Abstract: A vehicle has a battery pack. The battery pack includes batteries or a battery module. The battery module includes batteries. Each battery includes a battery casing and an explosion-proof valve. The explosion-proof valve is arranged on the battery casing. The explosion-proof valve is provided with a notch groove. The explosion-proof valve includes an opening area. In the depth direction of the notch groove, the shape of the orthographic projection of the opening area is non-circular. An outer edge of the orthographic projection of the opening area is a preset opening boundary, an area of the orthographic projection of the opening area being S 1 , the area of the orthographic projection of the explosion-proof valve being S , S 1 and S meeting: S 1 / S ≥ 0.3, and the units of S 1 and S both are mm 2 .

公开(公告)号：EP4525165A1

公开(公告)日：2025-03-19

申请号：EP23802995.3

申请日：2023-05-11

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  CHEN, Chong ,  CHENG, Han

IPC: H01M50/317 ,  H01M50/35

Abstract: A battery cell (1), a battery pack (2) and a vehicle (4). The battery cell (1) comprises: a first recess (140) and a plurality of second recesses (150) that are constructed on the inner wall surface of a second side wall (130) and are concave in the direction facing away from an inner cavity (110) the first recess (140) forms an inner main air passage (141) in the inner cavity (110), the plurality of second recesses (150) form a plurality of branch air passages (151) in the inner cavity (110), the plurality of branch air passages (151) are separately communicated with the main air passage (141), the second side wall (130) is provided with an explosion-proof hole (160) corresponding to the position of the main air passage (141); an explosion-proof valve (300) mounted on the second side wall (130); and an electrode core (400) provided in a housing (100) and spaced apart from the explosion-proof hole (160).

公开(公告)号：EP4343953A1

公开(公告)日：2024-03-27

申请号：EP22845195.1

申请日：2022-07-13

Applicant: BYD Company Limited

Inventor： RONG, Liangbin ,  PAN, Qiu ,  WANG, Xinyue ,  CHENG, Han ,  YUAN, Wansong

IPC: H01M50/528 ,  H01M50/533 ,  H01M50/536 ,  H01M50/538 ,  H01M10/04

Abstract: The present disclosure discloses a cylindrical battery, which includes a casing, having an accommodating space; and a negative electrode sheet, a first separator, a positive electrode sheet and a second separator that are wound multiple turns to define an electrode core. The casing is co-axial with the electrode core. The electrode core is at least partially received in the accommodating space. The positive electrode sheet includes a positive electrode material layer and a positive electrode foil layer. The negative electrode sheet includes a negative electrode material layer and a negative electrode foil layer. At least some of the wound turns of the electrode foil layer extends toward one end of the casing to form a positive electrode tab. At least some of the wound turns of the negative electrode foil layer extends toward the other end of the casing to form the negative electrode tab. As a result, a portion of the positive electrode end surface of the electrode core that is not covered by the positive electrode tab is located at at least a side of the positive electrode tab, and a portion of the negative electrode end surface of the electrode core that is not covered by the negative electrode tab is located at at least a side of the negative electrode tab.

公开(公告)号：EP3961798A1

公开(公告)日：2022-03-02

申请号：EP21193350.2

申请日：2021-08-26

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  DUAN, Pingan ,  CHENG, Han

IPC: H01M50/531 ,  H01M50/536 ,  H01M50/538 ,  H01M10/058

Abstract: The present invention provides a battery core, a battery, and a battery pack. The battery core includes: at least one core, where each core has a plurality of tabs, the plurality of tabs successively form, after being converged, a tab end-portion staggered layer region, a tab soldering region, and a pre-soldered press-fit region, parts of the plurality of tabs exposed out of the core form a tab exposure region, and a length of the tab exposed out of the core in the tab exposure region is determined according to a width of the tab end-portion staggered layer region, a width of the tab soldering region, a width of the pre-soldered press-fit region, a thickness of the core, and a tab bending angle of the tab. Such a setting can make the length of the tab exposed out of the core in the tab exposure region more appropriate, and can prevent the tab after bending prevented from being pulled and torn, so as to avoid a capacity loss of the battery core. Moreover, the movable length of the tab can be made appropriate, the bending space can be made appropriate, and therefore, the capacity loss of the battery core can be avoided. In addition, the tab can be prevented from being compressed, so as to improve the safety of the battery core in use.

公开(公告)号：EP3916831A1

公开(公告)日：2021-12-01

申请号：EP20746030.4

申请日：2020-01-21

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  CHENG, Han ,  ZHU, Yan

IPC: H01M2/04 ,  H01M10/0525

Abstract: The present invention provides a battery unit, a battery module, and a vehicle. The battery unit includes a housing (1), a cover plate (2), a first battery post (31), a second battery post (32), and an electrode core (4). The housing (1) is provided with an opening. The cover plate (2) covers the opening. The electrode core (4) is disposed inside the housing (1). The cover plate (2) includes a cover plate body (21) and a concave cavity portion (22) that is concave inward relative to an outer surface of the cover plate body (21). The first battery post (31) is accommodated in the concave cavity portion (22). A first electrode tab of the electrode core (4) is electrically connected to the first battery post (31). The second battery post (32) is electrically connected to the cover plate body (21). A second electrode tab of the electrode core (4) is electrically connected to the cover plate body (21).

公开(公告)号：EP3731296A1

公开(公告)日：2020-10-28

申请号：EP18892497.1

申请日：2018-12-19

Applicant: BYD Company Limited

Inventor： JIANG, Luxia ,  CHENG, Han ,  ZHOU, Jiangtao ,  YANG, Keli

IPC: H01M2/04

Abstract: A battery cover plate assembly, a cell, a battery module, a power battery, and an electric vehicle are provided. The battery cover plate assembly includes a cover plate, an inner lead-out member, and an outer electrode terminal. The inner lead-out member and the outer electrode terminal are electrically connected by using a current interrupt apparatus. A flipping member of the current interrupt apparatus is electrically connected to the outer electrode terminal. A score member is electrically connected to the inner lead-out member. A score is formed on the score member and is electrically connected to the flipping member. The inner lead-out member is mounted on the cover plate through a cover plate insulator. The cover plate insulator has a first engagement portion engaged with the cover plate and a second engagement portion engaged with the inner lead-out member.

公开(公告)号：EP4525168A1

公开(公告)日：2025-03-19

申请号：EP23802981.3

申请日：2023-05-11

Applicant: BYD Company Limited

Inventor： CHENG, Han ,  WANG, Xinyue ,  CHEN, Chong

IPC: H01M50/342 ,  H01M50/367 ,  H01M50/249 ,  H01M50/588 ,  H01M50/593

Abstract: A battery cell (1), a battery pack (2) and a vehicle (4). The battery cell (1) comprises: a shell (100), which is provided with an inner cavity (110), a first side wall (120) and a second side wall (130), wherein the second side wall (130) is provided with an explosion-proof hole (131); the second side wall (130) supports a first bottom support (500) and a second bottom support (600), the first bottom support (500) and the second bottom support (600) are arranged in a spaced manner and define a first air channel (510), and the explosion-proof hole (131) is in communication with the inner cavity (110) by means of the first air channel (510); a terminal post (200), which is arranged on a side wall of the shell (100) other than the second side wall (130); and an explosion-proof valve (300), which is used for covering the explosion-proof hole (131). The first bottom support (500) and the second bottom support (600) jointly support a pole core (400), such that the pole core (400) is arranged spaced apart from the explosion-proof hole (131).