公开(公告)号：US20250079539A1

公开(公告)日：2025-03-06

申请号：US18950282

申请日：2024-11-18

Applicant: BYD COMPANY LIMITED

Inventor： Wenjing BAO ,  Jie LI ,  Qifeng LI ,  Yun YANG

IPC: H01M10/42 ,  H01M50/583

Abstract: A vehicle, having a battery system, and the battery system having a battery cell management chip, wherein the chip comprises a collection circuit, a power source, a processing circuit, and a dynamic protection circuit; the collection circuit is used for collecting a parameter value of a working parameter of a single battery cell and transmitting the parameter value to the processing circuit; the power source supplies power to the processing circuit; a storage circuit is used for storing a dynamic protection threshold value for the working parameter; the processing circuit is used for adjusting the working state of the single battery cell in the case of an anomaly; and the dynamic protection circuit is used for adjusting the working state of the single battery cell according to the dynamic protection threshold value.

公开(公告)号：US20250074209A1

公开(公告)日：2025-03-06

申请号：US18952913

申请日：2024-11-19

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Mingchuan SHI ,  Hao ZHANG ,  Chao YIN ,  Hongxia WANG

IPC: B60L15/20

Abstract: A vehicle torque control method includes: a wheel speed of a wheel corresponding to a vehicle drive shaft is acquired by a vehicle controller, and an equivalent rotating speed of a motor is calculated based on the wheel speed of the wheel. An actual rotating speed of the motor corresponding to the drive shaft is acquired by the vehicle controller, and based on the equivalent rotating speed of the motor and the actual rotating speed of the motor corresponding to the drive shaft, an equivalent rotating speed difference of the motor corresponding to the drive shaft is calculated. A correcting torque value is acquired by the vehicle controller, based on the equivalent rotating speed difference of the motor corresponding to the drive shaft. An output torque of the motor corresponding to the drive shaft is adjusted by the vehicle controller, based on the correcting torque value.

公开(公告)号：US12244004B2

公开(公告)日：2025-03-04

申请号：US17614285

申请日：2020-05-27

Applicant: BYD COMPANY LIMITED

Inventor： Yi Pan ,  Rong Hao ,  Na Chen ,  Xiaotao Yuan

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

Abstract: Disclosed herein are a composite cathode material for a lithium-ion battery, a lithium-ion battery, and a vehicle. A core of the cathode material is a lithium-nickel-cobalt-manganese oxide material. A surface layer of the cathode material is a lithium-nickel-cobalt oxide material doped with an element E. There is a transition layer between the core and the surface layer. The transition layer is a lithium-nickel-cobalt-manganese oxide material doped with the element E. A content of the element E in the transition layer shows a decreasing trend in a direction from the surface layer of the cathode material to the core. A general formula for the composition of the transition layer is Li1+mNi1-x-y-zCoxMnyEzO2. 0≤m≤0.1, 0.01≤x≤0.1, 0.01≤y≤0.1, and 0.01≤z≤0.1. E is at least one of Al, Zr, Ti, Y, Ba or Sr.

公开(公告)号：US20250070369A1

公开(公告)日：2025-02-27

申请号：US18943542

申请日：2024-11-11

Applicant: BYD COMPANY LIMITED

Inventor： Xinyue WANG ,  Wansong Yuan ,  Han Cheng ,  Qiu Pan ,  Kai Li

IPC: H01M50/325

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. The outer edge of the orthographic projection of the opening area is a preset opening boundary, the area of the orthographic projection of the opening area being S1, the area of the orthographic projection of the explosion-proof valve being S, S1 and S meeting: S1/S≥3, and the units of S1 and S both being mm2.

公开(公告)号：US20250058660A1

公开(公告)日：2025-02-20

申请号：US18938200

申请日：2024-11-05

Applicant: BYD COMPANY LIMITED

Inventor： Qian ZHU ,  Wei LIANG ,  Jianjian LIU ,  Mingzhe SONG ,  Li MA

IPC: B60L53/16

Abstract: A method and a system for controlling a charging port cover of a vehicle, and a vehicle are provided. The charging port cover includes an inner cover and an outer cover located on the outer side of the inner cover. The control method includes: vehicle environment information of the vehicle is obtained, and whether a user has an intention to charge the vehicle is detected according to the vehicle environment information. In response to detecting that the user has the intention to charge the vehicle, a control signal is generated under the condition that the vehicle environment information suggests that a user has a charging intention. According to the control signal, the inner cover and the outer cover are controlled to be opened.

公开(公告)号：US20250050731A1

公开(公告)日：2025-02-13

申请号：US18933585

申请日：2024-10-31

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Mingchuan SHI ,  Hongxia WANG ,  Hao ZHANG ,  Binhao ZHOU

IPC: B60K23/08 ,  B60K17/356

Abstract: A vehicle torque control method, comprising: acquiring a front axle equivalent axle speed and a rear axle equivalent axle speed of a vehicle, and determining an equivalent axle speed difference between front axles and rear axles of the vehicle according to the front axle equivalent axle speed and the rear axle equivalent axle speed; determining a drive shaft torque adjustment value according to the equivalent axle speed difference; and adjusting an output torque of a drive shaft motor according to the drive shaft torque adjustment value. Also disclosed are a vehicle torque control apparatus, an electronic device, a storage medium, and a vehicle.

公开(公告)号：US20250046906A1

公开(公告)日：2025-02-06

申请号：US18922555

申请日：2024-10-22

Applicant: BYD COMPANY LIMITED

Inventor： Yubo LIAN ,  Heping LING ,  Lei YAN ,  Gan SONG ,  Wen GAO

IPC: H01M10/637 ,  B60L53/24 ,  B60L58/27 ,  H01M10/615 ,  H01M10/625 ,  H02J7/14

Abstract: A battery self-heating device, comprising: a bridge arm converter, an energy storage element, an inductor and a controller. The controller is configured to control, in a preset state, the connection and disconnection of the bridge arm converter, such that a first power battery and a second power battery are respectively charged/discharged by means of the inductor, and each form a freewheeling circuit by means of the energy storage element, so as to realize the continuous heating of the first power battery and the second power battery.

公开(公告)号：US20250038349A1

公开(公告)日：2025-01-30

申请号：US18911746

申请日：2024-10-10

Applicant: BYD COMPANY LIMITED

Inventor： Xinyue Wang ,  Chong Chen ,  Han Cheng

IPC: H01M50/342 ,  B60R16/04 ,  H01M50/103 ,  H01M50/15 ,  H01M50/159 ,  H01M50/55

Abstract: A battery cell (e.g., in a battery pack, or in a vehicle) comprises: a housing having an inner cavity, a first side wall, and a second side wall; a terminal post; an explosion-proof valve; and an electrode core. A first recess and a plurality of second recesses are arranged on an inner wall surface of the second side wall and are concave in a direction facing away from the inner cavity. The first recess forms a main air passage in the inner cavity. The plurality of second recesses form a plurality of branch air passages, separately communicating with the main air passage, in the inner cavity. The second side wall comprises an explosion-proof hole corresponding to a position of the main air passage. The explosion-proof valve is mounted on the second side wall. The electrode core is arranged in the housing and spaced apart from the explosion-proof hole.

公开(公告)号：US20250023210A1

公开(公告)日：2025-01-16

申请号：US18897873

申请日：2024-09-26

Applicant: BYD COMPANY LIMITED

Inventor： Xinyue WANG ,  Wansong YUAN ,  Da ZHANG ,  Pingan DUAN

IPC: H01M50/553 ,  H01M50/103 ,  H01M50/548 ,  H01M50/586 ,  H01M50/593

Abstract: A battery includes a battery shell, an electrode core, and a conductive column. The electrode core is disposed within the battery shell, and the conductive column extends through the battery shell and is connected to the electrode core, where a cross-sectional area s in mm2 of the conductive column and a battery capacity C in Ah of the battery meet: C/s≤8.

公开(公告)号：US20250017325A1

公开(公告)日：2025-01-16

申请号：US18901449

申请日：2024-09-30

Applicant: BYD COMPANY LIMITED

Inventor： Ruyi LIU ,  Yanrong WANG ,  Yibo WANG

IPC: A44B11/25

Abstract: A seat belt device includes: a latch plate including a snap-fit notch and configured to connect to an end part of a seat belt; a shell including a latch plate channel, the latch plate channel configured for the latch plate to extend into; and a locking piece. The locking piece includes two positioning plates and a locking plate connecting the two positioning plates. The locking piece is disposed on the shell between a locking position and a release position. The two positioning plates are sliding fit with the shell. When the locking piece is in the locking position and the latch plate extends into the latch plate channel, the locking plate is snap-fitted in the snap-fit notch, and when the locking piece is in the release position, the locking plate is configured to avoid the latch plate.