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公开(公告)号：EP4231412A1
公开(公告)日：2023-08-23
申请号：EP21956349.1
申请日：2021-09-08
发明人： HUANG, Shan , LI, Shichao , LI, Haili , ZHAO, Wei , XIE, Lan
摘要： Embodiments of the present application provide a method for charging a traction battery and a battery management system, which can improve the performance of a traction battery. The method for charging the traction battery is applied to a battery management system BMS of the traction battery, where the method includes: in a charging process of the traction battery, obtaining a state parameter of the traction battery, where the state parameter includes at least one of the following parameters: a state of charge SOC, a state of health SOH, and a temperature; determining an SOC interval value and a discharging parameter corresponding to discharging of the traction battery based on the state parameter of the traction battery, where the discharging parameter includes at least one of the following parameters: a discharging time, a discharging current, and a discharging waveform; and when the SOC of the traction battery changes by the SOC interval value, controlling the traction battery to discharge with the discharging parameter. Through this technical solution, the state parameter and the SOC of the traction battery are combined, to control discharging timing and the discharging parameter of the traction battery in the charging process. On the basis of ensuring the safety performance of the traction battery, the charging performance of the traction battery is improved.
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公开(公告)号：EP3787146A1
公开(公告)日：2021-03-03
申请号：EP20794365.5
申请日：2020-04-20
发明人： LI, Shichao , DU, Mingshu , TANG, Shenzhi , RUAN, Jian , LU, Yanhua , ZHANG, Wei
摘要： The present application discloses a method, apparatus, device and medium for equalization control of battery packs. The method may include: acquiring a voltage of each of a plurality of cells of the battery pack; on the condition that one or more voltages of the voltages of the plurality of cells are within a preset voltage interval, selecting a target State of Charge (SOC)-Open Circuit Voltage (OCV) curve from a charging SOC-OCV curve and a discharging SOC-OCV curve stored for the battery pack based on the voltages within the preset voltage interval; acquiring a target SOC of each cell based on the target SOC-OCV curve and the voltage of each cell; calculating, for each cell, a SOC difference between the target SOC of the cell and a reference SOC; calculating an equalizing time for each cell based on the SOC difference of each cell; the preset voltage interval is determined based on a hysteresis interval. According to embodiments of the present application, the equalizing information can be precisely obtained for cells with a hysteresis effect.
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3.发明公开
公开(公告)号：EP3760474A1
公开(公告)日：2021-01-06
申请号：EP19891484.8
申请日：2019-11-29
发明人： RUAN, Jian , LI, Shichao , LU, Yanhua , HOU, Yizhen , ZHANG, Wei
IPC分类号： B60L53/62
摘要： The present application discloses a charging method, an apparatus, a device, a medium, a battery management system and a charging pile. The method includes: acquiring a charging demand parameter set by a user; calculating, according to the charging demand parameter and acquired actual operation state information of a battery, a target charging scheme for charging the battery; transmitting, according to the target charging scheme, a first charging request to a charging device, so that the charging device charges the battery according to the first charging request. According to the charging method, the apparatus, the device, medium, the battery management system and the charging pile provided in the embodiments of the present application, personalized smart charging can be achieved for different users.
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公开(公告)号：EP3742181A1
公开(公告)日：2020-11-25
申请号：EP20171922.6
申请日：2020-04-28
发明人： DU, Mingshu , LI, Shichao , RUAN, Jian , TANG, Shenzhi , LU, Yanhua , ZHANG, Wei
IPC分类号： G01R31/382 , G01R31/388 , G01R31/392
摘要： A method and apparatus for correcting a state of charge (SOC), a battery management system and a storage medium are provided. The method includes: acquiring (101) state data of a battery cell in a case where the battery cell meets a preset standing condition; determining (102), according to the state data of the battery cell, a near-steady-state battery model for characterizing a change in an open circuit voltage (OCV) over time in a near-steady-state and a steady-state time period threshold for characterizing whether a standing time period is sufficient; processing (103) the steady-state time period threshold by using the near-steady-state battery model to obtain an estimated steady-state OCV value; determining (104) a SOC corresponding to the estimated steady-state OCV value by using a preset correspondence between steady-state OCVs and SOCs; and correcting (105) a current SOC by using the SOC corresponding to the estimated steady-state OCV value. With embodiments of the disclosure, a steady-state OCV of a battery can be quickly estimated by using characteristics of an external circuit during a short standing time period of the battery, and applicability of an open-circuit voltage method can be improved.
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公开(公告)号：EP4246662A1
公开(公告)日：2023-09-20
申请号：EP21965151.0
申请日：2021-11-25
发明人： HUANG, Shan , XU, Guangyu , LI, Haili , LI, Shichao
摘要： Embodiments of the present application provide a method for charging a power battery and a battery management system, which can meet users' requirements for the charging speed while ensuring the safety performance of the power battery. The method is applied to a battery management system (BMS) for the power battery, the method comprising: determining a first charging current for the power battery; determining, according to the temperature of the power battery, whether to perform thermal management of the power battery; determining, if determining to perform the thermal management of the power battery, a thermal management current according to the first charging current and charging pile power; and sending the first charging current and the thermal management current to a charging pile, wherein the first charging current is used for charging the power battery and the thermal management current is used for performing the thermal management of the power battery.
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公开(公告)号：EP4231484A1
公开(公告)日：2023-08-23
申请号：EP21956352.5
申请日：2021-09-08
发明人： HUANG, Shan , LI, Shichao , LI, Haili , ZHAO, Wei , LIN, Zhen
摘要： Provided in the embodiments of the present application are a power battery charging method and a battery management system, which can effectively guarantee the safety performance of a battery. The method comprises: acquiring the temperature and a battery parameter of a power battery, wherein the battery parameter comprises a state of charge (SOC) and/or an open circuit voltage (OCV); determining a parameter threshold value according to the temperature of the power battery; and during the charging of the power battery, controlling the power battery to discharge or stop charging when the battery parameter of the power battery is greater than or equal to the parameter threshold value and the battery parameter of the power battery changes by a parameter interval value.
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7.发明公开
公开(公告)号：EP4083638A1
公开(公告)日：2022-11-02
申请号：EP21765814.5
申请日：2021-03-04
发明人： XU, Guangyu , LI, Shichao , ZHAO, Wei
IPC分类号： G01R31/36 , G01R31/378 , G01R31/396
摘要： Embodiments of this application provide a method and device for estimating a SOC of a battery pack, and a battery management system, and relate to the technical field of batteries. The battery pack includes a first cell without a plateau and a second cell with a plateau. At least one first cell is serially connected to the second cell. The method includes: determining a capacity variation of the battery pack based on a SOC variation of the first cell in comparison with an initial SOC of the first cell, and based on a nominal capacity of the first cell; obtaining an equalization capacity of the first cell and an equalization capacity of the second cell; and estimating a SOC of the second cell based on the capacity variation of the battery pack, the nominal capacity of the first cell, the equalization capacity of the first cell, the equalization capacity of the second cell, and an initial SOC of the second cell, and determining the SOC of the battery pack based on the SOC of the second cell. This method can precisely estimate the SOC of the second cell, thereby solving the problem of inaccurate estimation of the SOC in the prior art.
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公开(公告)号：EP3930075A1
公开(公告)日：2021-12-29
申请号：EP20904212.6
申请日：2020-09-25
发明人： TANG, Shenzhi , DU, Mingshu , LI, Shichao , RUAN, Jian
摘要： This application relates to the field of battery technologies, and discloses a method for updating an OCV-SOC curve of a battery pack, a battery management system, and a vehicle. The method for updating an OCV-SOC curve of a battery pack includes: obtaining information that represents an aging state of the battery pack; obtaining a current aging characteristic parameter of the battery pack based on a current OCV-SOC curve of the battery pack and the information; and updating the OCV-SOC curve of the battery pack based on the current aging characteristic parameter and the current OCV-SOC curve of the battery pack. In this application, the OCV-SOC curve of the battery pack is updated based on the aging state of the battery pack, thereby obtaining an OCV-SOC curve that meets the aging state of the battery pack and making it convenient to estimate the online state of the battery pack more accurately.
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公开(公告)号：EP3786655A1
公开(公告)日：2021-03-03
申请号：EP20808269.3
申请日：2020-04-22
发明人： DU, Mingshu , LI, Shichao , RUAN, Jian , TANG, Shenzhi , LU, Yanhua , ZHANG, Wei
IPC分类号： G01R31/392 , G01R31/367
摘要： This application discloses a method for correcting a SOH, an apparatus, a battery management system and a storage medium, where the method includes: obtaining a relationship curve between a ratio of an accumulated charge/discharge capacity variation and a corresponding voltage-parameter variation of a battery cell and a voltage parameter itself; determining a valid peak point on the relationship curve; determining a SOH calibration value corresponding to voltage parameter datum at the valid peak point; correcting a current SOH according to the SOH calibration value. The estimation accuracy of the SOH can be improved according to this application.
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10.发明公开
公开(公告)号：EP4280340A1
公开(公告)日：2023-11-22
申请号：EP21962957.3
申请日：2021-11-05
发明人： XIE, Lan , LIN, Zhen , HUANG, Shan , LI, Wei , LI, Shichao
摘要： The present application discloses a charging method for a battery pack, a computer-readable storage medium, and a power consuming apparatus. The charging method includes: sending, by a battery management module in the battery pack, a charging request for a first current to a charging pile for charging; controlling, when the battery management module determines that first-current charging of the battery pack meets a first predetermined condition, the battery pack to perform pulse discharge; and controlling, when the battery management module determines that pulse discharge of the battery pack meets a second predetermined condition, the battery pack to stop discharging, and sending a charging request for a second current to the charging pile for charging, where the second current is less than the first current. In the charging method for a battery pack according to embodiments of the present application, pulse discharge is performed at the moment of switching a charging current in a charging process, thereby effectively promoting the tip of precipitated lithium metal to re-enter an electrolyte, flattening lithium dendrites, and inhibiting the continuous accumulation of lithium dendrites, and improving the charging safety of the battery pack.
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