CN210518376U - BMS transfer station communication module - Google Patents

Abstract

The utility model provides a BMS transfer station communication module, which is arranged between a battery BMS and an upper computer and comprises a network communication device communicated with the upper computer and a CAN communication interface or a serial port communication interface communicated with the BMS; the network communication device comprises an Ethernet PHY controller and a network transformer, and realizes that the transfer station communicates with a remote upper computer through a network cable of RJ 45; the CAN communication interface comprises a CAN independent controller with an SPI interface and a CAN bus isolation circuit; the serial port communication interface comprises a digital isolator chip with the model number of ISO7241 and a transient voltage suppression differential transceiver. The utility model provides a can realize the communication module of the transfer station of BMS and host computer.

Description

BMS transfer station communication module

Technical Field

The utility model relates to a battery management system, especially a BMS transfer station communication module.

Background

The BATTERY management system (BATTERY MANAGEMENT SYSTEM) is a link between a BATTERY and a user, the main object is a secondary BATTERY, and in order to improve the utilization rate of the BATTERY and prevent the BATTERY from being overcharged and overdischarged, the BMS transfer station is an information medium between the BATTERY and the user, and supports interaction between a plurality of BATTERY information and upper computer software. At present, the BMS communication in the industry is mainly in a point-to-point communication mode, one computer has a BMS communication mode, or an embedded control system directly collects current BMS information. The former has limitation on the communication quantity, the latter has high development flexibility and difficulty, and the protocol compatible program is low.

Disclosure of Invention

The utility model aims at having taken the point-to-point communication mode to present BMS communication basically and giving first place to, the mode of BMS communication is taken to a computer, perhaps by embedded control system direct collection current BMS information. The former has limitation on communication quantity, and the latter has high development flexibility and difficulty and low protocol compatible program; the BMS transfer station communication module realizes communication between an upper computer and a battery.

The utility model discloses a realize that the technical scheme that its technical purpose adopted is: a BMS transfer station communication module is arranged between a battery BMS and an upper computer and comprises a network communication device communicated with the upper computer and a CAN communication interface or a serial communication interface communicated with the BMS;

the network communication device comprises an Ethernet PHY controller and a network transformer, and realizes that the transfer station communicates with a remote upper computer through a network cable of RJ 45;

the CAN communication interface comprises a CAN independent controller with an SPI interface and a CAN bus isolation circuit;

the serial port communication interface comprises a digital isolator chip with the model number of ISO7241 and a transient voltage suppression differential transceiver.

The utility model provides a can realize the communication module of the transfer station of BMS and host computer.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic block diagram of the communication module of the BMS transfer station according to embodiment 1 of the present invention.

Fig. 2 is a network interface according to embodiment 1 of the present invention.

Fig. 3 is the serial communication and CAN communication partial circuit of the embodiment 1 of the present invention.

Detailed Description

Embodiment 1, this embodiment is a BMS transfer station communication module, which is disposed between a battery BMS and an upper computer, and includes a network communication device communicating with the upper computer and a CAN communication interface or a serial communication interface communicating with the BMS. As shown in fig. 1, the mainstream communication mode of the BMS is a serial port or a CAN port, which is why the BMS is compatible with the serial port and the CAN port in this embodiment. At present, two common information acquisition modes are available in the market, one mode is that the information is acquired through an embedded system of a charging and discharging system and then is transmitted to a computer through a network port, the protocol compatibility of the mode is low, the development difficulty is high, and the quantity of BMSs (battery management systems) which can be accepted by each set of embedded system is limited. The other is to upload the data to the computer directly through a serial port, and the BMS can be connected in this way in a fewer number. Therefore, the BMS transit station shown in this embodiment is required to realize communication with the background.

The network communication device comprises an Ethernet PHY controller and a network transformer, as shown in FIG. 2, and realizes that the transfer station communicates with a remote upper computer through a network cable of RJ 45; an Ethernet PHY control consisting of an IC DP83848, a network interface HR911105A RJ45 and peripheral circuits. The Ethernet PHY controller and the network transformer are utilized to realize the isolation function of the communication between the transfer station and the remote upper computer through the network cable of the RJ45, which is beneficial to the stability of signals and strong anti-interference capability, and is one of the common modes of network communication at present. As shown in fig. 2, in this embodiment, a 50M communication interface chip is used, so that the speed is high. And the RJ45 connector with the isolation transformer is added, so that the real-time communication can be rapidly carried out with low delay and high reliability.

The CAN communication interface realizes the communication between the BMS and the transfer station and comprises a CAN independent controller with an SPI interface and a CAN bus isolation circuit; adopt CAN communication interface to realize the characteristics of the communication between BMS and the transfer station and prevent the crosstalk interference, otherwise burn out circuit board and other BMS easily, this also is the solution that CAN the problem that a plurality of BMS simultaneous communication will be solved. As shown in fig. 3: in the figure, a chip Ub1 is a serial communication chip with the model of LBC184, the serial communication chip adopts a 485 difference communication mode and can improve the communication distance and the anti-interference capability, and a chip Ub4 is an isolation chip with the model of ISO7241 and can eliminate the problems of interference and series voltage among a plurality of terminal devices. Ub5 is a SPI communication-CAN communication chip with model number MCP2515, and CAN solve the problem of insufficient CAN port of the processor. Ub6 is a model ISO1050 integrated CAN communication chip with isolation, which simplifies the design.

In the communication between the BMS and the transfer station, the serial communication interface comprises a digital isolator chip with the model number ISO7241 and a transient voltage suppression differential transceiver.

Claims (1)

1. The utility model provides a BMS transfer station communication module, sets up between battery BMS and host computer, its characterized in that: the system comprises a network communication device communicated with an upper computer and a CAN communication interface or a serial port communication interface communicated with a BMS;

the network communication device comprises an Ethernet PHY controller and a network transformer, and realizes that the transfer station communicates with a remote upper computer through a network cable of RJ 45;

the CAN communication interface comprises a CAN independent controller with an SPI interface and a CAN bus isolation circuit;

the serial port communication interface comprises a digital isolator chip with the model number of ISO7241 and a transient voltage suppression differential transceiver.

Images