-
公开(公告)号：US20240300379A1
公开(公告)日：2024-09-12
申请号：US18669524
申请日：2024-05-21
Applicant: BYD COMPANY LIMITED
Inventor： Linwang DENG , Xiaoqian LI , Tianyu FENG , Jingjing HONG
CPC classification number: B60L58/14 , H01M10/425 , H02J7/0047 , H02J7/00712 , H01M2010/4271 , H01M2220/20
Abstract: A battery management method includes: obtaining a current high-voltage inflection point power value of each cell; obtaining a current historical cumulative balance power value of each cell; obtaining a current equivalent self-discharge value of each cell through calculation; obtaining an equivalent self-discharge value at a previous moment of each cell; obtaining a target equivalent self-discharge value of each cell through calculation; determining a maximum target equivalent self-discharge value and a minimum target equivalent self-discharge value; obtaining a maximum equivalent self-discharge rate and a minimum equivalent self-discharge rate through calculation; and when a difference between the maximum equivalent self-discharge rate and the minimum equivalent self-discharge rate is greater than a preset threshold, managing a target cell corresponding to the maximum target equivalent self-discharge value.
-
12.发明公开公开(公告)号：US20230341472A1
公开(公告)日：2023-10-26
申请号：US18344556
申请日：2023-06-29
Applicant: BYD COMPANY LIMITED
Inventor： Tianyu FENG , Xiaoqian LI , Linwang DENG
IPC: G01R31/396 , G01R31/3842 , G01R31/367 , H02J7/00
CPC classification number: G01R31/396 , G01R31/3842 , G01R31/367 , H02J7/0048
Abstract: A method for determining a voltage inflection point of a cell core in a LFP battery includes: charging the LFP battery with a first current value and monitoring the State of charge (SOC) of the LFP battery, the first current value being greater than a predetermined threshold of current; if the SOC of the LFP battery is outside a predetermined detection range, charging the LFP battery with the first current value; if the SOC of the LFP battery is within the detection range, charging the LFP battery with a second current value, the second current value being less than the predetermined threshold of current; and detecting the voltage inflection point of various cell cores in the LFP battery according to parameter information of the various cell cores in the LFP battery in the process of charging where the SOC is within the detection range.
-
13.发明公开公开(公告)号：US20230221373A1
公开(公告)日：2023-07-13
申请号：US18188788
申请日：2023-03-23
Applicant: BYD COMPANY LIMITED
Inventor： Linwang DENG , Tianyu FENG , Shiwei SHU , Sijia LIU
IPC: G01R31/3835 , G01R31/371
CPC classification number: G01R31/3835 , G01R31/371
Abstract: A method for detecting a lithium plating state of a battery includes regularly collecting a voltage of a battery after the end of charging at a preset time interval after the battery is in an idle state, and associatively storing the collected voltage and a collection time as voltage data; constructing a time-differential voltage curve in a voltage-time coordinate system according to the voltage data; detecting whether a characteristic peak voltage exists in the time-differential voltage curve; and sending a warning message when detecting that the characteristic peak voltage exists in the time-differential voltage curve.
-
公开(公告)号：US20230152380A1
公开(公告)日：2023-05-18
申请号：US17915308
申请日：2021-03-15
Applicant: BYD COMPANY LIMITED
Inventor： Sijia LIU , Tianyu FENG , Linwang DENG , Xiaoqian LI , Xun SONG
IPC: G01R31/3842 , G01R31/367 , G01R31/36 , G01R31/396
CPC classification number: G01R31/3842 , G01R31/367 , G01R31/3648 , G01R31/396 , H01M2010/4271
Abstract: The present disclosure relates to a method and apparatus for determining a state of charge (SOC) of a battery and a battery management system (BMS), so as to resolve a problem such as inaccurate estimation of the SOC. The method includes: acquiring state data of the battery, where the state data comprises current data and voltage data; determining each element parameter value in an equivalent circuit model of the battery based on the equivalent circuit model, error information, battery characteristic data, and the state data by using a recursive least square (RLS) prediction model; and determining an estimated value of the SOC of the battery based on the element parameter value in the equivalent circuit model, the state data, and the battery characteristic data according to a technique of an observer.
-
15.发明申请公开(公告)号：US20220352728A1
公开(公告)日：2022-11-03
申请号：US17763943
申请日：2020-09-24
Applicant: BYD COMPANY LIMITED
Inventor： Tianyu FENG , Linwang DENG , Sijia LIU , Xiaoqian LI , Bin KANG
IPC: H02J7/00 , B60R16/033 , H01M10/48 , H01M10/44
Abstract: A step-varying equalization method, a device, a medium, a battery pack, and a vehicle are provided. The method includes: initiating coarse-tuning equalization for a cell in the series-connected battery when an initial equalization difference of the cell reaches a preset coarse-tuning requirement; determining a first state of charge (SOC) equalization difference according to a first voltage value of the cell after completion of the coarse-tuning equalization when a first real equalization difference of the cell after the coarse-tuning equalization reaches a preset fine-tuning requirement, and initiating fine-tuning equalization for the cell with a first equalization step size based on the first SOC equalization difference; and determining that SOC equalization of the cell is completed when a second real equalization difference of the cell after completion of the fine-tuning equalization is less than or equal to a target equalization value.
-
Patent Agency Ranking
公开(公告)号：US20250038557A1
公开(公告)日：2025-01-30
申请号：US18915822
申请日：2024-10-15
Applicant: BYD COMPANY LIMITED
Inventor： Linwang DENG , Tianyu FENG , Shi XIONG
Abstract: A battery circuit comprises: a power source end, a first battery pack, a second battery pack, a voltage transformation unit, a first switch, a second switch and a ground end. A positive electrode of the first battery pack is connected to the power source end, and a negative electrode of the first battery pack is connected to a positive electrode of the second battery pack; a negative electrode of the second battery pack is connected to the ground end; a first end of the first switch is connected to the power source end, and a second end of the first switch is connected to a first end of the second switch; a second end of the second switch is connected to the ground end; and the voltage transformation unit is connected between the negative electrode of the first battery pack and the second end of the first switch.
-
17.发明公开公开(公告)号：US20240246449A1
公开(公告)日：2024-07-25
申请号：US18623023
申请日：2024-03-31
Applicant: BYD COMPANY LIMITED
Inventor： Qiuyong ZENG , Xiaofeng SHEN , Linwang DENG , Yuanhong LIU , Honggang YOU , Xunwen CAO
CPC classification number: B60L58/12 , B60L3/00 , B60L53/62 , B60L2260/52
Abstract: A charging control method for a vehicle having an electric function includes: vehicle usage habit data of a user in preset time is read. The usage habit data includes a charging time point of each charging and driving mileage of each driving of the vehicle in the preset time. A current remaining state of charge of the vehicle at a current moment is detected. An estimated need state of charge of the vehicle is determined based on the usage habit data. Whether the vehicle needs charging is determined based on the estimated need state of charge and the current remaining state of charge. The present disclosure further provides a charging control apparatus, a vehicle, and a computer-readable storage medium.
-
公开(公告)号：US20240239203A1
公开(公告)日：2024-07-18
申请号：US18622991
申请日：2024-03-31
Applicant: BYD COMPANY LIMITED
Inventor： Tianyu FENG , Zhan SHU , Linwang DENG , Shiwei SHU
CPC classification number: B60L3/12 , B60L58/10 , B60L2260/54
Abstract: Disclosed are a user type identification method, an electronic device, and a readable storage medium. The method includes: obtaining driving data in a preset time period, where the driving data includes at least a driving time, an accumulated driving mileage, and a driving speed in a vehicle driving process; obtaining to-be-analyzed data based on the driving data in the preset time period, where the to-be-analyzed data includes daily driving duration, a daily driving mileage, and a quantity of times of driving at each moment daily; and performing analysis on the to-be-analyzed data through a preset identification model, to obtain a user type.
-
19.发明公开公开(公告)号：US20230231403A1
公开(公告)日：2023-07-20
申请号：US18189474
申请日：2023-03-24
Applicant: BYD COMPANY LIMITED
Inventor： Tianyu FENG , Shiwei SHU , Linwang DENG , Xiaoqian LI
IPC: H02J7/00 , G01R31/3835 , G01R31/389 , H01M10/44 , H01M10/48
CPC classification number: H02J7/00714 , G01R31/389 , G01R31/3835 , H01M10/44 , H01M10/48 , H02J7/0047 , B60R16/033 , H01M2220/20
Abstract: A battery charging method based on lithium plating detection includes: acquiring a battery charging strategy table after receiving a battery charging instruction; charging a battery according to a charging current in the battery charging strategy table, and performing at least one charging lithium plating detection on the battery during the charging of the battery, to obtain a first lithium plating detection result; continuing the charging of the battery according to the charging current and the charging lithium plating detection of the battery when no lithium plating phenomenon occurs, and stopping the charging lithium plating detection when the lithium plating phenomenon occurs or the charging of the battery is completed; and updating the charging current according to a preset first current reduction strategy when the lithium plating phenomenon occurs, and continuing the charging of the battery according to the updated charging current until the charging is completed.
-
20.发明申请公开(公告)号：US20190168632A1
公开(公告)日：2019-06-06
申请号：US16323055
申请日：2017-08-04
Applicant: BYD COMPANY LIMITED
Inventor： Linwang DENG , Jingcui TENG , Chao WANG , Yu ZENG , Shiqing YANG
Abstract: The present disclosure discloses an energy management system of an electric vehicle, a control method therefor, and an electric vehicle. The system includes: a power battery including a plurality of battery modules; a plurality of balanced DC-DC converter modules, first ends of the balanced DC-DC converter modules being correspondingly connected to the battery modules and second ends of the balanced DC-DC converter modules being connected in parallel to a low-voltage direct-current bus; a bidirectional car charger having an alternating-current end configured to connect to a power grid/charging box, a first direct-current end connected to the low-voltage direct-current bus, and a second direct-current end connected to a high-voltage direct-current bus; a sampling module; and a control module configured to separately control each balanced DC-DC converter module according to the state information of each battery module, the state information of the low-voltage battery, the state information of the power battery and the load information of the low-voltage electric apparatuses to perform balancing management on the plurality of battery modules, supply power to the low-voltage electric apparatuses, and charge the low-voltage battery, and controlling the bidirectional car charger to supply power to the low-voltage electric apparatuses and charge the low-voltage battery. The system realizes the power supply to the low-voltage components of the entire vehicle, the balancing of the power battery and the redundancy design of key functions, and improves the safety and reliability of the system.
-
-
-
-
-
-
-
-
-
Search Results
20
records
(took 0.019 seconds)
