公开(公告)号：US20220239135A1

公开(公告)日：2022-07-28

申请号：US17540436

申请日：2021-12-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhanliang LI ,  Yu YAN ,  Shuyun XIONG ,  Weiping SUN ,  Zhimin DAN

IPC: H02J7/00 ,  H02J7/02

Abstract: The present application provide a power supply control method for a power conversion apparatus, where the power conversion apparatus is configured to conduct a power conversion between a charging apparatus and a power battery, the method includes: conducting a power-on self-test with the charging apparatus of auxiliary power by the power conversion apparatus; determining a power supply priority order of the charging power and the power battery on the basis of a state parameter of the power battery under the condition that the self-test of the power conversion apparatus succeeds; determining the one of the charging power of the charging apparatus and the power battery with a higher power supply priority as a current working power of the power conversion apparatus by the power conversion apparatus. The method of the present application can provide a stable working power for the power conversion apparatus without additional power supply device.

公开(公告)号：US20220121262A1

公开(公告)日：2022-04-21

申请号：US17566723

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Liansong WANG ,  Zhimin DAN ,  Fupeng CAI ,  Yizhen HOU ,  Wei ZHANG

IPC: G06F1/3212 ,  G06F1/16

Abstract: This application discloses a power supply guarantee system and method. The power supply guarantee system is applied to a battery management system. The power supply guarantee system includes: a main control module, configured to send a received wake-up time to a timing device; a high voltage power module, configured to power the timing device according to electrical energy in a high voltage battery pack; the timing device, configured to set a wake-up clock according to the wake-up time, start timing when the BMS enters sleep, and send a discharge instruction to the high voltage battery pack when the timing reaches the wake-up time; and a power conversion module, configured to convert high voltage electrical energy into low voltage electrical energy, and use the low voltage electrical energy to power the BMS, where the high voltage electrical energy is output by the high voltage battery pack according to the discharge instruction.

公开(公告)号：US20210231742A1

公开(公告)日：2021-07-29

申请号：US17051184

申请日：2020-01-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng LI ,  Zhimin DAN ,  Weiping SUN ,  Yizhen HOU ,  Wei ZHANG

IPC: G01R31/389 ,  G01R31/36 ,  G01R31/364

Abstract: The present application discloses an insulation detection circuit, a method and a battery management system. The circuit includes: a first voltage dividing module, where, one end of the first voltage dividing module is connected to a positive electrode of a power battery to be detected, and the other end of the first voltage dividing module is connected to a first isolation module and a second voltage dividing module respectively; the second voltage dividing module, connected to a negative electrode of the power battery to be detected; the first isolation module, connected to one end of a sampling module; the sampling module, where, the other end of the sampling module is connected to one end of a signal generating module; the signal generating module, where, the other end of the signal generating module is connected to power ground; and the processing module.

公开(公告)号：US20210111443A1

公开(公告)日：2021-04-15

申请号：US17130972

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiao WANG ,  Chao ZENG ,  Jia XU ,  Zhimin DAN ,  Yizhen HOU ,  Wei ZHANG ,  Guoliang HU

IPC: H01M10/48 ,  B60L58/24 ,  H01M10/42

Abstract: This application provides a method, an apparatus, a system for detecting battery thermal runaway, and a battery management unit. The method includes: obtaining an output signal of an air pressure sensor located in a battery pack, and obtaining parameter information of the battery pack; determining state information of the air pressure sensor based on the output signal of the air pressure sensor; and generating an alarm signal indicating occurrence of thermal runaway in the battery pack based on the state information of the air pressure sensor and the parameter information of the battery pack. In this application, the thermal runaway detection for the battery pack may be implemented by considering parameter information of both the air pressure sensor and the battery pack, improving the reliability of the thermal runaway detection for the battery pack, reducing the probability of false positives and false negatives, and improving driving safety.

公开(公告)号：US20200350770A1

公开(公告)日：2020-11-05

申请号：US16555006

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin DAN ,  Chao ZENG ,  Xiao WANG ,  Jia XU ,  Yizhen HOU ,  Wei ZHANG ,  Guoliang HU

IPC: H02J7/00 ,  G01R31/382 ,  G01R31/364

Abstract: The present disclosure provides a thermal runaway detection circuit and a method, which is directed to field of batteries. The circuit includes: a sensing module including a terminating resistor; a detection module including a first voltage dividing resistor set and a second voltage dividing resistor set; and 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. The thermal runaway detection data includes first sampled data and second sampled data. The technical solutions in the present disclosure can improve safety of the battery pack.

公开(公告)号：US20200207237A1

公开(公告)日：2020-07-02

申请号：US16370975

申请日：2019-03-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiyang ZUO ,  Zhimin DAN ,  Wei ZHANG ,  Yizhen HOU ,  Guowei LI ,  Xingyuan WU ,  Yanru LI

IPC: B60L58/27 ,  B60L50/51 ,  B60L58/12

Abstract: The disclosure provides a battery heating system and a control method thereof. The system includes a first switch, a second switch, a switch component, a motor, and a main controller. The first switch, the second switch, the switch component and the main controller are integrated in a same housing. The main controller is to determine, based on a state parameter of the battery pack, that the battery pack needs to be heated, and to send a battery heating request to a vehicle controller, so as to enable the vehicle controller to send a battery heating instruction to the main controller according to the battery heating request in a case where a vehicle is in a static state and the motor is not operating; and to control, based on the battery heating instruction, the first switch, the second switch and the switch component so as to heat the battery pack.

公开(公告)号：US20200083730A1

公开(公告)日：2020-03-12

申请号：US16539996

申请日：2019-08-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin DAN ,  Wenbin LU ,  Wei ZHANG ,  Yizhen HOU ,  Jia XU ,  Jiechao LUO ,  Teng YU

IPC: H02J7/00 ,  G01R31/392 ,  G01R31/3842 ,  G01R31/389

Abstract: The present disclosure provides a battery management system, and a method and apparatus for transmitting information. The method includes: determining, from a plurality of slave nodes, a fault slave node that communicates abnormally with a master node in the battery management system; selecting a target slave node from the plurality of slave nodes, wherein the target slave node is a slave node that communicates normally with both the master node and the fault slave node; transmitting frequency conversion information to the target slave node, so that the target slave node forwards the frequency conversion information to the fault slave node, and the fault slave node performs a frequency conversion based on the frequency conversion information; and transmitting information with the fault slave node using a frequency after the frequency conversion. According to embodiments of the present disclosure, the reliability of wireless communication in the battery management system can be improved.

公开(公告)号：US20240304890A1

公开(公告)日：2024-09-12

申请号：US18669698

申请日：2024-05-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhanliang LI ,  Yuanmiao ZHAO ,  Yu YAN ,  Xinwei CHEN ,  Xiyang ZUO ,  Xiaojian HUANG ,  Zhimin DAN

IPC: H01M10/637 ,  H01M10/615 ,  H02J7/00 ,  H02J7/34 ,  H02M3/335

CPC classification number: H01M10/637 ,  H01M10/615 ,  H02J7/007194 ,  H02J7/34 ,  H02M3/33584

Abstract: The present application discloses a charging apparatus, which comprises: a direct current (DC) source; a bidirectional DC converter connected between the DC source and a charging port of the charging apparatus; a pulse heating module connected in parallel with the bidirectional DC converter; and a controller configured for: selecting, when a heating request is received and according to a heating frequency requirement of a battery, one of the pulse heating module and the bidirectional DC converter to heat the battery. The present application also relates to a method for heating a battery and a storage medium.

公开(公告)号：US20240178690A1

公开(公告)日：2024-05-30

申请号：US18431824

申请日：2024-02-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaojian HUANG ,  Zhimin DAN ,  Yizhen HOU ,  Wei ZHANG

IPC: H02J7/00 ,  B60L58/27 ,  H02J7/14 ,  H02J7/34

CPC classification number: H02J7/007 ,  B60L58/27 ,  H02J7/1423 ,  H02J7/342 ,  H02J7/345

Abstract: A charge/discharge circuit includes a power supply module including a battery group, a heating module including an energy storage module and a switch module, and a charge-discharge switching module. The battery group, the switch module, and the charge-discharge switching module are connected in parallel. A first terminal of the energy storage module is connected to the switch module, and a second terminal of the energy storage module is connected to the charge-discharge switching module. The charge-discharge switching module and the switch module are configured to produce a current of an alternating-current waveform in the charge/discharge circuit in response to a charge/discharge enable signal.

公开(公告)号：US20230395899A1

公开(公告)日：2023-12-07

申请号：US18453056

申请日：2023-08-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xinwei CHEN ,  Zhimin DAN ,  Chengyong LIU ,  Wei ZHANG ,  Yu YAN ,  Xian HUANG

IPC: H01M10/657 ,  H02J7/00 ,  H01M10/42 ,  H01M10/48 ,  H01M10/625 ,  H01M10/615

CPC classification number: H01M10/657 ,  H02J7/0063 ,  H02J7/0047 ,  H01M10/4264 ,  H01M10/48 ,  H01M10/625 ,  H01M10/615 ,  H01M2220/20 ,  H01M2010/4271

Abstract: A heating method traction battery. The traction battery is connected to a switch circuit of a motor and configured to supply power to the motor via the switch circuit. The switch circuit includes multiple legs and the multiple legs are connected to the traction battery in parallel. The method includes: receiving a heating signal sent by a battery management system of the traction battery; and controlling, according to the heating signal, at least one of the multiple legs to form a short-circuit loop of the traction battery, the short-circuit loop being configured to discharge the traction battery and heat the traction battery during the discharging process.