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公开(公告)号：US11327139B2
公开(公告)日：2022-05-10
申请号：US16953563
申请日：2020-11-20
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yizhen Hou , Zhimin Dan , Wei Zhang , Jia Xu
Abstract: A measurement device includes: a host computer and a current source, wherein the host computer is configured to: control, when ambient temperature of a current detection device is at a preset temperature within an operation temperature range of a shunt of the current detection device, the current source to output a current with a preset current value to the current detection device; receive a calibrated current value sent by the current detection device; calculate a measurement error of the current detection device according to the preset current value and the calibrated current value; and instruct, when the measurement error is less than a preset current error, the current detection device to use the predetermined current calibration coefficient as a current calibration coefficient.
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公开(公告)号：US11050287B2
公开(公告)日：2021-06-29
申请号：US16235261
申请日：2018-12-28
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Zhang , Zhimin Dan , Yizhen Hou , Xiyang Zuo , Wenbin Lu , Xingyuan Wu , Taosheng Zhu
Abstract: A battery pack system includes a battery pack, a battery management module, a discharge circuit module, a charge circuit module and an energy storage module. The battery pack is connected to the discharge circuit module in series and the battery pack is connected to the charge circuit module in series. The battery management module is configured to monitor a temperature of the battery pack, and if the temperature is lower than a first temperature threshold, send a switch-on instruction to the discharge circuit module and the charge circuit module alternately at a regulation frequency. The discharge circuit module is configured to switch on according to the switch-on instruction to enable electricity of the battery pack to flow into the energy storage module. The charge circuit module is configured to switch on according to the switch-on instruction to enable electricity of the energy storage module to flow into the battery pack.
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公开(公告)号：US10996251B2
公开(公告)日：2021-05-04
申请号：US16233620
申请日：2018-12-27
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Zhimin Dan , Yizhen Hou , Weiping Sun , Meng Li , Wei Zhang , Teng Yu
Abstract: Provided is a method and device for obtaining internal side and external side insulation resistances of a relay. The method includes steps of controlling the insulation resistance obtaining circuit to output a low-frequency AC signal; when both the main relay and the pre-charge relay are switched off, obtaining an internal side insulation resistance of the main relay according to the low-frequency AC signal; if the internal side insulation resistance of the main relay is normal, controlling the pre-charge relay to be switched on; and when the main relay is switched off and the pre-charge relay is switched on, obtaining an external side insulation resistance value of the main relay according to the low-frequency AC signal.
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公开(公告)号：US10957950B1
公开(公告)日：2021-03-23
申请号：US17099956
申请日：2020-11-17
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yizhen Hou , Xiyang Zuo , Zhimin Dan , Wei Zhang , Xingyuan Wu , Taosheng Zhu
IPC: H01M10/625 , H01M10/615 , H01M10/48 , H01M10/637 , H02J7/00 , H02J7/34 , H01M10/657
Abstract: The present application discloses a heating module, a heating method for a battery module, and a heating system. The heating module includes: an energy storage unit, a first switch unit, a second switch unit and a control unit. The energy storage unit, a first battery unit in a battery module and the first switch unit may form a first heating loop; the energy storage unit, a second battery unit in the battery module, and the second switch unit may form a second heating loop. The control unit may control the first switch unit or the second switch unit, so as to sequentially switch on, between the first heating loop and the second heating loop, a heating loop where a battery unit with a higher state of charge is located and a heating loop where a battery unit with a lower state of charge is located.
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公开(公告)号：US10938628B2
公开(公告)日：2021-03-02
申请号：US16540402
申请日：2019-08-14
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Zhimin Dan , Wenbin Lu , Wei Zhang , Yizhen Hou , Jia Xu , Jiechao Luo , Teng Yu
Abstract: The present disclosure provides a battery management system and a communication method. The method includes: determining, by a main BMU, from a plurality of managed units a fault unit that communicates abnormally with the main BMU, and transmitting, by the main BMU, to a backup BMU a fault frequency at which the fault unit communicates abnormally with the main BMU; selecting, by the backup BMU, from the managed units a managed unit that communicates normally with the backup BMU and the fault unit as a target unit; transmitting, by the backup BMU, frequency-conversion information to the fault unit through the target unit based on the fault frequency; converting, by the fault unit, its frequency to a frequency; transmitting the frequency to the main BMU if the backup BMU communicates normally with the fault unit using the frequency; and communicating, by the main BMU, with the fault unit using the frequency.
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Patent Agency Ranking
公开(公告)号：US10797674B2
公开(公告)日：2020-10-06
申请号：US16166478
申请日：2018-10-22
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Zhimin Dan , Wei Zhang , Yizhen Hou , Jia Xu
IPC: H03F3/45 , H03H7/06 , G01R31/382 , G01R31/36 , G01R19/00 , G01R19/25 , G01R31/3835
Abstract: The present application provides an apparatus for processing signals of a high-voltage loop, a detector, a battery device, and a vehicle. The apparatus includes a filter circuit connected to an element to be detected and configured to filter signals from the element to be detected; a differential amplification circuit connected to the filter circuit and configured to amplify the filtered signals; and a processor connected to the differential amplification circuit and configured to process the amplified signals.
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公开(公告)号：US10763552B2
公开(公告)日：2020-09-01
申请号：US16245198
申请日：2019-01-10
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Zhimin Dan , Meng Li , Yizhen Hou , Wei Zhang , Lidan Yan
IPC: G01R31/382 , H01M10/42 , G01R27/02 , G01R31/3835 , G01R31/50 , G01R31/396 , H01M10/48 , G01R31/12
Abstract: The present disclosure provides an insulation detection circuit and method, and a battery management system. The circuit includes a first isolation module, a voltage division module, a signal generation module, first and second sampling points and a processor. A first end of the first isolation module is connected to a power battery, and a second end of the first isolation module is connected to the second sampling point. The signal generation module is connected to the first sampling point and configured to inject an AC signal into the power battery and provide the first sampling point with a first sampled signal. A first end of the voltage division module is connected to the first sampling point, and a second end of the voltage division module is connected to the second sampling point. The processor is configured to calculate an insulation resistance of the power battery.
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公开(公告)号：US10725110B2
公开(公告)日：2020-07-28
申请号：US16165811
申请日：2018-10-19
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Zhimin Dan , Wei Zhang , Yizhen Hou , Jia Xu
Abstract: The present disclosure provides a current detection system, method and device. The current detection system includes a management unit and a current detection device that is connected with the management unit. The current detection device includes a shunt-type current measurement unit, an open-loop Hall-type current measurement unit and an isolation power unit.
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公开(公告)号：US10718797B2
公开(公告)日：2020-07-21
申请号：US16165925
申请日：2018-10-19
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Zhang , Zhimin Dan , Jiechao Luo , Yizhen Hou
IPC: G01R19/165 , B60L58/10 , G01R31/382 , G01R19/10 , G01R31/36 , H02J7/00
Abstract: A current detecting apparatus and a battery management system are provided. In the current detecting apparatus, a positive electrode of a power battery pack is connected to a first terminal of a primary positive circuit, a negative electrode of the power battery pack is connected to a first terminal of a primary negative circuit, and a current sensor is connected in series between the negative electrode of the power battery pack and the first terminal of the primary negative circuit; the current sensor is configured for obtaining and outputting a voltage signal of the power battery pack; a microcontroller unit is configured for implementing current conversion on the voltage signal, transmitting a detected current value, which is obtained by the current conversion, of the power battery pack and receiving a control command for controlling the primary positive and negative circuits to turn on or turn off.
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80.发明申请公开(公告)号：US20190120924A1
公开(公告)日：2019-04-25
申请号：US16165801
申请日：2018-10-19
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yizhen Hou , Zhimin Dan , Wei Zhang , Jia Xu
Abstract: The present discloses a measurement device and a measurement method for measuring a current calibration coefficient, and a current detection device and method. The measurement device includes: a host computer and a current source, wherein the current source is connected in series with a shunt of a current detection device to be calibrated, and wherein the host computer is configured to control the current source to output a current with a specified current value, and to calculate a current calibration coefficient according to the specified current value and the detected current value calculated by a current calculation unit of the current detection device. present disclosure
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