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公开(公告)号：US20210075073A1
公开(公告)日：2021-03-11
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: H01M10/615 , H01M10/48 , H01M10/637 , H01M10/657 , H01M10/625 , H02J7/34 , H02J7/00
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：US20210072336A1
公开(公告)日：2021-03-11
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：US10928459B2
公开(公告)日：2021-02-23
申请号：US16113424
申请日：2018-08-27
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Zhanyu Sun , Zhimin Dan , Yizhen Hou , Jiechao Luo , Wei Zhang
IPC: G01R31/389 , G01R31/14 , G01R31/327 , G01R31/36 , G01R27/02
Abstract: The present disclosure provides a battery detection circuit and a battery management system. The battery detection circuit includes a positive relay, a negative relay, a first positive sampling unit, a first negative sampling unit, a second positive sampling unit, a second negative sampling unit, and a reference voltage terminal, wherein: all of the first positive sampling unit, the first negative sampling unit, the second positive sampling unit, the second negative sampling unit and a power battery pack to be detected are connected to the reference voltage terminal. With the battery detection circuit and the battery management system of the present disclosure, both the cost of the battery detection circuit and the complexity of the structure of the battery detection circuit can be reduced.
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公开(公告)号：US20200381788A1
公开(公告)日：2020-12-03
申请号：US16860408
申请日：2020-04-28
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xinxin DU , Zhimin Dan , Fuping Luo , Shengwei Wang , Tiancong Wang , Xiyang Zuo
IPC: H01M10/637 , H02J7/00 , H01M10/615
Abstract: Disclosed are a heating method for a rechargeable battery, a control unit and a heating circuit. The heating method comprises: determining a frequency value of a pulse current for heating the rechargeable battery in response to a heating command of the rechargeable battery; determining a current value of the pulse current according to the frequency value and an acquired state parameter of the rechargeable battery; judging whether the current value satisfies a preset heating demand; if the current value satisfies the heating demand, generating the pulse current under control according to the frequency value; if the current value does not satisfy the heating demand, re-determining the frequency value and the current value of the pulse current. The embodiments of the present disclosure further provide a control unit and a heating circuit.
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公开(公告)号：US20200348365A1
公开(公告)日：2020-11-05
申请号：US16559644
申请日：2019-09-04
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xiao WANG , Chao Zeng , Jia Xu , Zhimin Dan , Yizhen Hou , Wei Zhang , Guoliang Hu
IPC: G01R31/392 , H02J7/00 , G01R31/3842 , G01K3/00 , G01K3/10 , G01K13/00 , H01M10/48 , H01M10/42
Abstract: The disclosure provides a thermal runaway detection circuit and method, and relates to batteries. The thermal runaway detection circuit includes: a sensing module including a sensing cable; a detection module connected to the sensing cable and including at least one set of voltage dividing resistors; a processing module connected to the detection module, wherein the processing module is configured to obtain thermal runaway detection data, and determine whether thermal runaway occurs in the battery pack based on the thermal runaway detection data, wherein the thermal runaway detection data includes battery pack data and sampled data collected from sampling points, and the sampling points are disposed between the two connected voltage dividing resistor sets. The technical solutions in the present disclosure can improve safety of the battery pack.
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Patent Agency Ranking
公开(公告)号：US10775441B2
公开(公告)日：2020-09-15
申请号：US16112718
申请日：2018-08-26
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Zhimin Dan , Zhanyu Sun , Yizhen Hou , Jiechao Luo , Wei Zhang
IPC: G01R31/36 , G01R31/389 , G01R31/14 , G01R27/02 , G01R31/327
Abstract: An insulation detection circuit, detection method, and battery management system are disclosed in the present disclosure. The insulation detection circuit includes a positive sampling unit, a negative sampling unit, a positive sampling point, a negative sampling point, a reference voltage terminal, and a processor. A first end of the positive sampling unit is connected with positive electrode of the power battery pack to be measured. A second end of the positive sampling unit is connected with the reference voltage terminal and the positive sampling point. A first end of the negative sampling unit is connected with negative electrode of the power battery pack to be measured. A second end of the negative sampling unit is connected with the reference voltage terminal and the negative sampling point. The processor is connected with the positive sampling point and the negative sampling point.
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公开(公告)号：US12051934B2
公开(公告)日：2024-07-30
申请号：US17563513
申请日：2021-12-28
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yu Yan , Xiyang Zuo , Zhimin Dan , Haili Li , Shan Huang , Shichao Li
CPC classification number: H02J7/00714 , B60L50/60 , B60L58/12 , H01M10/425 , H02J7/0048 , B60L2210/10 , B60L2210/30 , H01M2010/4271
Abstract: Embodiments of the application provide a method for charging battery a charging and discharging device, which can ensure the safety performance of the battery. The charging and discharging device includes a first DC/DC converter, a unidirectional AC/DC converter and a control unit, where the first DC/DC converter is a unidirectional DC/DC converter, and the control unit is configured to: receive a first charging current and control the unidirectional AC/DC converter and the first DC/DC converter to charge a battery through an AC power source based on the first charging current; receive a first discharging current, and control the battery to release power based on the first discharging current; and receive a second charging current, and control the unidirectional AC/DC converter and the first DC/DC converter to charge the battery through the AC power source based on the second charging current.
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公开(公告)号：US11894786B2
公开(公告)日：2024-02-06
申请号：US17858864
申请日：2022-07-06
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xiong Zheng , Xianxi Pan , Yu Luo , Zhimin Dan
CPC classification number: H02P21/05 , H02P6/10 , H02P21/22 , H02P2207/05
Abstract: This application provides a permanent-magnet synchronous machine control method and device, and a permanent-magnet synchronous machine control system. The method includes: obtaining a d-axis current id and a q-axis current iq in a permanent-magnet synchronous machine control loop at a current moment; obtaining a fifth-order harmonic current id5th and a seventh-order harmonic current id7th in the d-axis current id in the permanent-magnet synchronous machine control loop at the current moment, and a fifth-order harmonic current iq5th and a seventh-order harmonic current iq7th in the q-axis current iq in the permanent-magnet synchronous machine loop at the current moment; determining a d-axis current idk+1 at a next moment in each switch state; determining a q-axis current iqk+1 at the next moment in each switch state based on the first current idk, the second current iqk, and the second voltage in each switch state; and determining a control policy of the permanent-magnet synchronous machine.
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公开(公告)号：US11876160B2
公开(公告)日：2024-01-16
申请号：US18148126
申请日：2022-12-29
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xinwei Chen , Zhimin Dan , Chengyong Liu , Wei Zhang , Yizhen Hou , Xian Huang
IPC: H01M10/6571 , H01M10/615 , H01M10/63
CPC classification number: H01M10/6571 , H01M10/615 , H01M10/63
Abstract: A heating system includes first and second input ends, first and second battery modules, first switch and second switches, and a control unit. The first switch is connected between first terminals of the first and second battery modules. Second terminals of the first and second battery modules are connected to each other. The second switch is connected between the first input end and the first terminal of the second battery module. The second input end is connected to the first terminal of the first battery module. The first terminals of the first and second battery modules have a same polarity, and the second terminals of the first and second battery modules have a same polarity. The control unit is connected to the first and second switches, and configured to control the first and second switches to be turned on or off.
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公开(公告)号：US11502346B1
公开(公告)日：2022-11-15
申请号：US17877208
申请日：2022-07-29
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xiaojian Huang , Zhimin Dan , Bao Li , Xiyang Zuo
IPC: H01M10/63 , H01M10/615 , H01M10/625 , H01M10/48 , H02P29/66 , G01K3/00 , G01K3/10 , G01R31/34 , B60L58/27
Abstract: Disclosed is a traction battery self-heating control method and a device. Acquiring a second temperature of a rotor at a current sampling time according to system parameters and a first temperature of the rotor at a previous sampling time, and estimating a third temperature of the rotor at a next sampling time according to the first temperature and the second temperature, and stopping the self-heating of the traction battery when the third temperature reaches a demagnetization temperature of the rotor. Whether to stop the self-heating of the traction battery is determined by estimating a rotor temperature under the self-heating condition, and comparing the rotor temperature with the demagnetization temperature of the rotor, and thus the self-heating control of the traction battery is realized.
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