Carrier communication application circuit of battery management system

Abstract

According to the carrier communication application circuit of the battery management system provided by the utility model, the designed circuit structure communicates through the charging power line, and no extra communication line is needed; wherein the carrier communication module couples a communication signal to a charging power line, so that electrical isolation between power and communication is realized, communication circuit components are protected, and a communication circuit is simplified; through the carrier communication circuit, the charging power line can complete the charging and communication functions between the charger and the battery, the carrier communication circuit comprises the charger and the battery, the charger and the battery are both internally provided with carrier communication modules and MCUs, the two carrier communication modules are both provided with two connector lugs, and the two connector lugs are connected with the MCU. The two connector lugs are connected with two battery lines, direct communication is performed through a power line, a communication signal is loaded on the battery lines, modulation and analysis of the communication signal are realized through a carrier communication module, the battery is a direct-current battery, and the two connector lugs are divided into a positive electrode and a negative electrode.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, in particular to a carrier communication application circuit of a battery management system. Background Art

[0002] For safe charging, the battery needs to communicate with the charger during charging. The charger needs to read information such as battery charging voltage, current, single cell voltage, battery pack temperature, etc. The communication circuit structure between the traditional charger and the battery management system is as follows: Figure 1 . In addition to the charging power line, an additional communication line needs to be connected, the wiring is complicated, and the connector requirements are high. At present, the charger and the battery management system usually communicate using RS485, CAN, IIC and other communication methods. During use, at least two communication lines need to be connected separately. At the same time, if the charging and discharging power lines and the communication lines share the same ground, the communication circuit components are easily damaged during the live plug-in process. This separate communication routing method leads to poor communication reliability and high product cost, and cannot fully meet the various application requirements of current battery management. Utility Model Content

[0003] In view of the defects existing in the prior art, the technical problem solved by the utility model is: to provide a carrier communication application circuit for a battery management system.

[0004] In order to achieve the above objectives, the utility model provides:

[0005] A battery management system carrier communication application circuit comprises a charger and a battery, wherein the charger and the battery are both provided with a carrier communication module and an MCU, two carrier communication modules are each provided with two wiring heads, two battery lines are connected to the two wiring heads, direct communication is achieved through a power line, a communication signal is loaded on the battery line, and modulation and analysis of the communication signal are achieved through the carrier communication module.

[0006] Preferably, the battery is a DC battery.

[0007] Preferably, the two terminal heads are divided into a positive pole and a negative pole.

[0008] Preferably, the carrier communication module is connected to the corresponding MCU, and the UART communication protocol is used between the carrier communication module and the MCU. When the carrier communication module sends, the data sent from the UART is coded and modulated and coupled to the charging power line. When the carrier communication module receives, the carrier signal is parsed from the charging power line and sent to the MCU via the UART.

[0009] Compared with the prior art, the advantages of the utility model are:

[0010] The circuit structure of the utility model communicates through the charging power line, and no additional communication line is required; wherein the carrier communication module couples the communication signal to the charging power line, realizes the electrical isolation between power and communication, protects the communication circuit components, and simplifies the communication circuit;

[0011] The utility model can realize the charging power line to complete the functions of charging and communication between the charger and the battery through the carrier communication circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the communication circuit structure between the traditional charger and the battery management system;

[0013] Figure 2 This is a battery management system carrier communication application circuit diagram designed for this purpose.

[0014] In the figure: 1. charger; 11. carrier communication module; 12. terminal block; 2. battery; 3. charging cable. DETAILED DESCRIPTION

[0015] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0016] See also Figure 2 As shown, a carrier communication application circuit of a battery management system includes a charger 1 and a battery 2, wherein the charger 1 and the battery 2 are both provided with a carrier communication module 11 and an MCU, and two wiring heads 12 are provided on the two carrier communication modules 11, and two battery lines 3 are connected to the two wiring heads 12. The communication signals are loaded on the battery lines 3 through direct communication via the power lines, and the modulation and analysis of the communication signals are realized through the carrier communication module 11.

[0017] In this embodiment, the battery 2 is a DC battery.

[0018] In this embodiment, the two terminal heads 12 are divided into a positive pole and a negative pole.

[0019] In this embodiment, the carrier communication module 11 is connected to the corresponding MCU, and the UART communication protocol is used between the carrier communication module 11 and the MCU. When the carrier communication module sends, the data sent from the UART is encoded and modulated and coupled to the charging power line. When the carrier communication module receives, the carrier signal is parsed from the charging power line and sent to the MCU through the UART.

[0020] Working mode: The carrier communication circuit structure is as follows Figure 2As shown. The main structure includes: a DC battery (Vi n), a carrier communication module. The circuit structure communicates directly through the power line, loads the communication signal on the battery line, and realizes the modulation and analysis of the communication signal through the carrier communication module. The UART communication protocol is used between the carrier communication module and the MCU. When the carrier communication module sends, the data sent from the UART is encoded and modulated and coupled to the charging power line. When the carrier communication module receives, the carrier signal is analyzed from the charging power line and sent to the MCU through the UART.

[0021] The circuit structure that realizes the communication between the charger and the battery management system. This communication method only requires the charging power line to be connected between the charger and the battery management system, and no additional communication line is required. The carrier module and the power line are coupled with a transformer, which effectively protects the communication circuit.

[0022] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to the present invention is within the scope of protection.

Claims

1. A battery management system carrier communication application circuit, comprising a charger (1) and a battery (2), characterized in that: The charger (1) and the battery (2) are both provided with a carrier communication module (11) and an MCU, and the two carrier communication modules (11) are both provided with two connection heads (12), and the two connection heads (12) are connected to two battery wires (3).

2. A battery management system carrier communication application circuit according to claim 1, characterized in that: The battery (2) is a direct current battery.

3. A battery management system carrier communication application circuit according to claim 1, characterized in that: The two terminal heads (12) are divided into a positive pole and a negative pole.

4. A battery management system carrier communication application circuit according to claim 1, characterized in that: The carrier communication module (11) is connected to the corresponding MCU.

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