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.

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.

公开(公告)号：US11146090B2

公开(公告)日：2021-10-12

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: G01R31/08 ,  H04J1/00 ,  H04L12/16 ,  H02J7/00 ,  G01R31/389 ,  G01R31/3842 ,  G01R31/392 ,  H04W52/02

Abstract: The present disclosure provides a method for transmitting information in a battery management system. 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：US10756770B2

公开(公告)日：2020-08-25

申请号：US16542401

申请日：2019-08-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yizhen Hou ,  Zhimin Dan ,  Wei Zhang ,  Jiechao Luo ,  Wenbin Lu ,  Jia Xu ,  Teng Yu

IPC: H04B1/04 ,  H04B1/00 ,  H03H7/01 ,  H01Q1/52 ,  H04B1/10

Abstract: A system comprises an antenna, a port converting device, an information transmission device, a shield case, and a reference voltage end; wherein the antenna, the port converting device, and the information transmission device are connected sequentially, and the information transmission device is disposed within the shield case, and both the shield case and the port converting device is connected with the reference voltage end; the antenna is configured for a conversion between a radio frequency signal and a single-ended signal; the port converting device is configured for a conversion between the single-ended signal and target differential mode signals; the information transmission device is configured to transmit and process the target differential mode signals; and parameters of components in the port converting device is determined according to a preset communication frequency and a voltage amplitude and phase of a differential mode signal.

公开(公告)号：US20190064285A1

公开(公告)日：2019-02-28

申请号：US16112719

申请日：2018-08-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiechao Luo ,  Wei Zhang ,  Zhanyu Sun ,  Yizhen Hou ,  Zhimin Dan

IPC: G01R31/36

Abstract: A relay diagnosis circuit, diagnosis method, and battery management system are disclosed in the present disclosure. The relay diagnosis circuit may include a first sampling unit, a second sampling unit, a first sampling point, a second sampling point, a reference voltage terminal, and a processor. A first end of the first sampling unit is connected with voltage output end of the power battery pack to be measured and a first end of a relay. A second end of the first sampling unit is connected with the reference voltage terminal and the first sampling point. A first end of the second sampling unit is connected with a second end of the relay. A second end of the second sampling unit is connected with the reference voltage terminal and the second sampling point.

公开(公告)号：US11251630B2

公开(公告)日：2022-02-15

申请号：US16559645

申请日：2019-09-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Zhang ,  Zhimin Dan ,  Yizhen Hou ,  Jia Xu ,  Jiechao Luo ,  Wenbin Lu ,  Teng Yu

IPC: H02J7/00 ,  G01R31/382 ,  G01R31/396 ,  H01M10/42

Abstract: The battery management system comprises: a battery management unit, configured to receive status information of a battery module and status information of a battery pack, and transmit a control instruction to cell measurement circuits; the cell measurement circuits, configured to collect the status information of the battery module, transmit the status information of the battery module to the battery management unit, receive and execute the control instruction transmitted from the battery management unit; sensing units, configured to collect the status information of the battery pack, and transmit the status information of the battery pack to the battery management unit; wherein a wireless communication unit is disposed in the battery management unit, and a wireless communication unit is disposed in at least a portion of the cell measurement circuits and/or at least a portion of the sensing units.

公开(公告)号：US11102651B2

公开(公告)日：2021-08-24

申请号：US16555020

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wenbin Lu ,  Zhimin Dan ,  Yizhen Hou ,  Wei Zhang ,  Jia Xu ,  Jiechao Luo ,  Teng Yu

IPC: H04L9/08 ,  H04W12/06 ,  H04L9/30 ,  H04L9/14 ,  H04L29/06 ,  H04W12/033 ,  H04W12/041 ,  H04W12/71 ,  H04W12/0471 ,  H04L9/32

Abstract: The embodiments of the present disclosure disclose a method for data transmission, comprising: authenticating, by a target node in a battery management system, a source node in response to a request for data transmission from the source node; selecting, by the target node, any two prime numbers from a pre-stored set of prime numbers if the authentication is passed, generating a public key and a private key according to the two prime numbers, and transmitting the public key to the source node; performing, by the source node, a first encryption byte-by-byte for source data to be transmitted using the public key, performing a second encryption for the first encrypted data using a first encryption algorithm stored by the source node itself, and transmitting the second encrypted data to the target node.

公开(公告)号：US10884061B2

公开(公告)日：2021-01-05

申请号：US16112719

申请日：2018-08-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiechao Luo ,  Wei Zhang ,  Zhanyu Sun ,  Yizhen Hou ,  Zhimin Dan

IPC: G01R31/364 ,  G01R31/327 ,  H01H47/00 ,  G01R31/36

Abstract: A relay diagnosis circuit, diagnosis method, and battery management system are disclosed in the present disclosure. The relay diagnosis circuit may include a first sampling unit, a second sampling unit, a first sampling point, a second sampling point, a reference voltage terminal, and a processor. A first end of the first sampling unit is connected with voltage output end of the power battery pack to be measured and a first end of a relay. A second end of the first sampling unit is connected with the reference voltage terminal and the first sampling point. A first end of the second sampling unit is connected with a second end of the relay. A second end of the second sampling unit is connected with the reference voltage terminal and the second sampling point.

公开(公告)号：US11329866B2

公开(公告)日：2022-05-10

申请号：US17155109

申请日：2021-01-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin Dan ,  Wenbin Lu ,  Wei Zhang ,  Yizhen Hou ,  Jia Xu ,  Jiechao Luo ,  Teng Yu

IPC: H04L12/24 ,  H04L41/0668 ,  H04B1/713

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.

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

IPC: H04L12/24 ,  H04B1/713

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.