CN-224233690-U - Battery management system and communication circuit thereof, energy storage system or electricity utilization device

Abstract

The application provides a battery management system, a communication circuit and an energy storage system or an electricity utilization device thereof, wherein the communication circuit is arranged on a circuit board and comprises a control circuit, a communication circuit and a receiving and transmitting circuit, the communication circuit is connected between the control circuit and the receiving and transmitting circuit and comprises at least one signal channel, and one side of the at least one signal channel is provided with a ground wire consistent with the extending direction of the signal channel. When the embodiment of the application is applied to point-to-point high-speed communication, the ground wire consistent with the extending direction of the signal channel is distributed on one side of the signal channel, so that the signal channel and the ground wire form the minimum reflux path, and the anti-interference capability of a communication circuit and communication signals is improved.

Inventors

• YAN ZHIWEI
• ZHANG ZHENPENG
• MI AMIN
• WANG CHONGXI
• ZHANG XU
• MA XING

Assignees

• 宁德时代新能源科技股份有限公司
• 宁德时代润智软件科技有限公司

Dates

Publication Date

20260512

Application Date

20250407

Claims (15)

1. 1. The communication circuit of the battery management system is characterized by comprising a control circuit, a communication circuit and a receiving and transmitting circuit, wherein the communication circuit is connected between the control circuit and the receiving and transmitting circuit and comprises at least one signal channel, and one side of at least one signal channel is provided with a ground wire consistent with the extending direction of the signal channel.
2. 2. The communication circuit of claim 1, further comprising a circuit board, wherein one or more of the control circuit, the communication line, and the transceiver circuit are disposed on the circuit board.
3. 3. The communication circuit of claim 2, wherein the circuit board comprises a first circuit board and a second circuit board, the control circuit is disposed on the first circuit board, the transceiver circuit is disposed on the second circuit board, and the first circuit board and the second circuit board are mated through a connector.
4. 4. The communication circuit of claim 3, wherein the circuit board further comprises a third circuit board, the connector comprising a first connector through which the first circuit board interfaces with the third circuit board, and a second connector through which the second circuit board interfaces with the third circuit board, the first connector electrically connected with the second connector through the third circuit board.
5. 5. A communication circuit according to claim 3 or 4, wherein the connector includes a signal pin connected to the signal path and a ground pin connected to the ground, and wherein the ground pin is provided between signal pins connected to adjacent signal paths in the connector.
6. 6. A communication circuit according to any one of claims 1 to 4, wherein the signal paths comprise a plurality of the ground lines being arranged between adjacent ones of the signal paths.
7. 7. The communication circuit according to any one of claims 1 to 4, further comprising a power supply circuit and a power supply line, the transceiver circuit comprising a power supply port and a first ground port for connecting the ground line; The first end of the positive electrode wire of the power supply circuit is connected to the positive electrode of the output end of the power supply circuit, and the second end of the positive electrode wire is connected to the power supply port of the transceiver circuit; The first end of the negative electrode wire of the power supply circuit is connected to the negative electrode of the output end of the power supply circuit, and the second end of the negative electrode wire is connected to the first ground port of the transceiver circuit.
8. 8. The communication circuit of any of claims 1 to 4, wherein the transceiver circuit comprises at least one transceiver, the transceiver comprises a first communication port and a first ground port, the control circuit comprises at least one second communication port and at least one second ground port, two ends of the signal path are respectively connected to the corresponding second communication port and the corresponding first communication port of the transceiver, and two ends of the ground line are respectively connected to the corresponding second ground port and the corresponding first ground port of the transceiver.
9. 9. The communication circuit according to any one of claims 1 to 4, further comprising a signal processing circuit connected to the communication line and the ground line and located between the control circuit and the transceiver circuit.
10. 10. The communication circuit according to claim 9, wherein the signal processing circuit comprises a level shifting circuit and/or a buffer circuit.
11. 11. The communication circuit of claim 9, wherein the signal processing circuit includes at least one electrostatic protection circuit connected to the signal path and the ground line on one side of the signal path.
12. 12. The communication circuit of claim 11, wherein the electrostatic protection circuit comprises a transient suppression diode connected across the signal path and the ground line, respectively.
13. 13. The communication circuit of claim 11, wherein the signal path comprises a first communication line and a second communication line, the electrostatic protection circuit comprises an electrostatic discharge tube, two cathodes of the electrostatic discharge tube are respectively connected to the first communication line and the second communication line, and an anode of the electrostatic discharge tube is connected to the ground line.
14. 14. A battery management system comprising a communication circuit of the battery management system according to any one of claims 1 to 13.
15. 15. An energy storage system or electricity device comprising a battery device and a communication circuit of the battery management system of any one of claims 1 to 13, the communication circuit being electrically connected to the battery device.

Description

Battery management system and communication circuit thereof, energy storage system or electricity utilization device Technical Field The application belongs to the technical field of electronic circuits, and particularly relates to a battery management system, a communication circuit thereof and an energy storage system or an electric device. Background The medium-and-large-scale control system generally comprises a main control board, a slave control board, a collection board and the like, and in a normal case, one main control board needs to interact information with a plurality of slave control boards, and one slave control board needs to interact information with a plurality of collection boards. Bus type communication mode cannot meet the demands of the control system due to low communication rate and limited nodes and distances. The point-to-point communication mode can use high-speed communication, but high-speed signals are weak in interference resistance and easy to cause communication quality problems. Disclosure of utility model In view of the above problems, the present application provides a battery management system, a communication circuit thereof, and an energy storage system or an electric device, which aims to solve the problem of weak anti-interference capability of conventional point-to-point high-speed communication. In a first aspect, an embodiment of the present application provides a communication circuit of a battery management system, where the communication circuit includes a control circuit, a communication line, and a transceiver circuit, the communication line is connected between the control circuit and the transceiver circuit, the communication line includes at least one signal channel, and a ground wire consistent with an extension direction of the signal channel is disposed on one side of the at least one signal channel. In the technical scheme of the embodiment of the application, when the communication circuit is applied to point-to-point high-speed communication, the ground wire which is consistent with the extending direction of the signal channel is distributed on one side of the signal channel, so that the signal channel and the ground wire form the minimum reflux path, and the anti-interference capability of the communication circuit and the communication signal is improved. In some embodiments, the communication circuit further comprises a circuit board, one or more of the control circuit, the communication line, and the transceiver circuit being disposed on the circuit board. In the technical scheme of the embodiment of the application, the application scenes of some communication circuits are provided, the control circuit, the communication circuit and the transceiver circuit can be arranged in a split board or a same board, and the communication circuit can be arranged in a wiring mode of a circuit board or a wire or cable mode. In some embodiments, the circuit board includes a first circuit board and a second circuit board, the control circuit is disposed on the first circuit board, the transceiver circuit is disposed on the second circuit board, and the first circuit board and the second circuit board are abutted through the connector. In the technical scheme of the embodiment of the application, the control circuit and the transceiver circuit are arranged on different circuit boards, and when part of the circuits need to be updated or damaged, part of the circuit boards can be directly replaced, so that the maintenance cost is reduced. In some embodiments, the circuit board further comprises a third circuit board, the connector comprises a first connector and a second connector, the first circuit board is mated with the third circuit board through the first connector, the second circuit board is mated with the third circuit board through the second connector, and the first connector is electrically connected with the second connector through the third circuit board. In the technical scheme of the embodiment of the application, the third circuit board is equivalent to a fixed plugging or expanding platform for the communication circuit, which is beneficial to the assembly and maintenance of the system. In some embodiments, the connector includes a signal pin connected to the signal path and a ground pin connected to the ground, and the ground pin is disposed between the signal pins connected to adjacent signal paths in the connector. In the technical scheme of the embodiment of the application, the pins of the connector are also separated by the ground pins, so that the signal can have the minimum reflux path, and the anti-interference capability of the communication circuit and the communication signal is improved. In some embodiments, the signal channels include a plurality of ground lines disposed between adjacent signal channels. In the technical scheme of the embodiment of the application, under the condition that a plurality of signal channels are simulta