公开(公告)号：US20180018499A1

公开(公告)日：2018-01-18

申请号：US15549121

申请日：2016-01-05

Applicant: BYD COMPANY LIMITED

Inventor： Lei LEI ,  Kunping XU ,  Yun YANG

IPC: G06K9/00 ,  G06K9/34

CPC classification number: G06K9/00067 ,  G06K9/00087 ,  G06K9/34

Abstract: The present disclosure discloses method for calculating an area of a fingerprint overlapping region, including: collecting a to-be-matched fingerprint to obtain a to-be-matched fingerprint image; searching multiple pairs of matching characteristic points between the to-be-matched fingerprint image and a preset template fingerprint image; obtaining an image offset of the to-be-matched fingerprint image according to the multiple pairs of matching characteristic points; based on the image offset, adjusting a position of the to-be-matched fingerprint image to obtain an overlapping region between the to-be-matched fingerprint image and the preset template fingerprint image; and calculating a total number of image pixels within the overlapping region, and calculating an area of the overlapping region based on the total number of image pixels within the overlapping region.

公开(公告)号：US20230052214A1

公开(公告)日：2023-02-16

申请号：US17977043

申请日：2022-10-31

Applicant: BYD COMPANY LIMITED

Inventor： Xinjun JIANG ,  Jian ZHANG ,  Lei LEI

IPC: H01M4/70 ,  H01M50/46

Abstract: An electrode sheet includes a current collector and a first active material layer coated on a first surface of the current collector. The first active material layer includes a first groove, and the first groove includes a first side wall, a second side wall, and a third side wall. The first side wall and the second side wall are arranged parallel to each other, and the third side wall connects the first side wall and the second side wall. The first groove has a width that is a distance from the first side wall to the second side wall, and a length of a surface contour of a cross-section view of the third side wall is greater than the width of the first groove.

公开(公告)号：US20230048047A1

公开(公告)日：2023-02-16

申请号：US17977821

申请日：2022-10-31

Applicant: BYD COMPANY LIMITED

Inventor： Xinjun JIANG ,  Jian ZHANG ,  Lei LEI

IPC: H01M10/0587 ,  H01M4/13

Abstract: An electrode sheet includes a current collector and a first active material layer on a first surface of the current collector. The first active material layer includes a main portion and a first buffer portion. The main portion includes a first inner surface and an outer surface. The first inner surface is attached to the current collector, and the outer surface is parallel to the first inner surface. The first active material layer has a height that is a vertical distance from the outer surface to the first inner surface. The first buffer portion includes a second inner surface, a buffer surface, and an inner wall surface defining a first groove. A first end of the buffer surface is connected to the outer surface, a second end of the buffer surface is connected to the inner wall surface. The inner wall surface is shorter than the first active material layer.