Battery management system, and method and apparatus for transmitting information

Patent metadata

Field	Value
Publication number	US-11146090-B2
Application number	US-201916539996-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Sep 12, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

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.

First claim

What is claimed is:

1. A method for transmitting information in a battery management system, comprising:
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,
wherein when transmission of information with the fault slave node using the frequency after the frequency conversion is successful, the method further comprises:
transmitting the frequency after the frequency conversion to all slave nodes of the plurality of slave nodes except the fault slave node.

2. The method of claim 1 , wherein the selecting a target slave node from the plurality of slave nodes comprises:
selecting, from the plurality of slave nodes, any slave node other than the fault slave node as a first slave node;
determining the first slave node as the target slave node, when the first slave node communicates normally with both the master node and the fault slave node; and
reselecting the first slave node when the first slave node communicates abnormally with at least one of the master node and the fault slave node.

3. The method of claim 1 , wherein when transmission of information with the fault slave node using the frequency after the frequency conversion fails, the method further comprises:
forwarding data between the master node and the fault slave node using the target slave node.

4. The method of claim 1 , wherein the method further comprises:
determining that no target slave node is selected from the plurality of slave nodes;
performing a timed frequency hopping based on a preset frequency hopping rule, and transmitting information with the fault slave node using a frequency after the frequency hopping,
wherein the frequency after the frequency hopping is consistent with a frequency of the fault slave node after a timed frequency hopping based on the preset frequency hopping rule.

5. A method for transmitting information in a battery management system, comprising:
receiving frequency conversion information transmitted by a master node in the battery management system;
forwarding the frequency conversion information to a fault slave node, so that the fault slave node performs a frequency conversion based on the frequency conversion information, and the master node transmits information with the fault slave node using the frequency after the frequency conversion,
wherein the fault slave node is a slave node, determined by the master node from a plurality of slave nodes, that communicates abnormally with the master node,
wherein when the master node successfully transmits information with the fault slave node using the frequency after the frequency conversion, the frequency after the frequency conversion is transmitted by the master node to all slave nodes of the plurality of slave nodes except the fault slave node.

6. The method of claim 5 , wherein when the master node successfully transmits information with the fault slave node using the frequency after the frequency conversion, the method further comprises:
receiving and storing the frequency after the frequency conversion transmitted by the master node.

7. The method of claim 5 , wherein when the master node fails to transmit information with the fault slave node using the frequency after the frequency conversion, the method further comprises:
forwarding data between the master node and the fault slave node.

8. A method for transmitting information in a battery management system, comprising:
receiving frequency conversion information transmitted by a target slave node, wherein the target slave node is a slave node selected from a plurality of slave nodes by a master node in the battery management system, and the target slave node is a slave node that communicates normally with both the master node and a fault slave node, and wherein the fault slave node is a slave node, determined by the master node from the plurality of slave nodes, that communicates abnormally with the master node; and
performing a frequency conversion based on the frequency conversion information, so that the master node uses a frequency after the frequency conversion to transmit information with the fault slave node,
wherein when the master node fails to select the target slave node from the plurality of slave nodes, the method further comprises:
performing a timed frequency hopping based on a preset frequency hopping rule within a preset time period, and transmitting information with the master node using a frequency after the frequency hopping,
wherein the frequency after the frequency hopping is consistent with a frequency of the master node after a timed frequency hopping based on the preset frequency hopping rule.

9. The method of claim 8 , wherein when the master node fails to transmit information with the fault slave node using the frequency after the frequency conversion, the method further comprises:
forwarding data between the master node and the fault slave node using the target slave node.

10. An apparatus for transmitting information in a battery management system, comprising:
a processor; and
a memory for storing instructions executable by the processor,
wherein the processor is configured to perform the method of claim 1 .

11. An apparatus for transmitting information in a battery management system, comprising:
a processor; and
a memory for storing instructions executable by the processor,
wherein the processor is configured to perform the method of claim 5 .

12. An apparatus for transmitting information in a battery management system, comprising:
a processor; and
a memory for storing instructions executable by the processor,
wherein the processor is configured to perform the method of claim 8 .

13. A battery management system, comprising the apparatus for transmitting information in a battery management system according to claim 10 , wherein the processor is further configured to:
receive frequency conversion information transmitted by the master node in the battery management system;
forward the frequency conversion information to the fault slave node, so that the fault slave node performs a frequency conversion based on the frequency conversion information, and the master node transmits information with the fault slave node using the frequency after the frequency conversion;
receive frequency conversion information transmitted by the target slave node; and
perform a frequency conversion based on the frequency conversion information, so that the master node uses a frequency after the frequency conversion to transmit information with the fault slave node.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Dan Zhimin
• Lu Wenbin
• Zhang Wei
• Hou Yizhen
• Xu Jia
• Luo Jiechao
• Yu Teng

Classifications

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H02J7/40 Primary

  characterised by the exchange of charge or discharge related data · CPC title

• H02J7/875 Primary

  Charging or discharging for charge maintenance, battery initiation or rejuvenation · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H04L41/0661

  by reconfiguring faulty entities · CPC title