Marine Battery System Monitoring Unit Expansion Module

Abstract

The invention relates to an expansion module for a marine battery system monitoring unit. The expansion module is plugged and connected via an RS232‑C nine-pin interface and a monitoring unit RS232‑C nine-pin interface. The high or low level signal output by the monitoring unit is sent to the monitoring unit output signal conversion circuit via RTS and SG ports, and the output DO1+ terminal and the output DO1‑terminal of the corresponding expansion module are turned on or off; the fault signal contact closure or disconnection signal is sent via the input D+ terminal and the input D‑terminal of the monitoring unit input signal conversion circuit, and the TXD and RXD ports of the corresponding expansion module output high or low level. The marine battery system monitoring unit that does not have the digital quantity input acquisition and output control capability is provided with the capability of one digital quantity input acquisition and one digital quantity output control through the software programming of the expansion module and the monitoring unit, and the signal acquisition and control of the marine battery system monitoring unit nearby are effectively solved.

Description

Technical Field

[0001] The invention relates to a connection circuit, in particular to an expansion module of a marine battery system monitoring unit. Background Art

[0002] With the development of pure battery power and hybrid power technology for ships, marine battery systems have begun to be widely accepted by shipowners because of their good performance. The marine battery system monitoring unit is a platform for human-computer interaction of the battery system, which is used to display the voltage, current, temperature, SOC, SOH, insulation and other information and alarm prompts of all batteries. At present, industrial-grade high-speed integrated industrial computers or touch screens are generally used as monitoring units. The marine battery system monitoring unit is generally arranged at the exit of the battery compartment, which is convenient for crew members to observe the information and alarms of the battery system during inspection or troubleshooting.

[0003] Typical industrial computers or touch screens have many industrial-grade serial ports, such as RS232, RS422, and RS485, but do not have the ability to collect switch data and directly output control. Some signal acquisition close to the marine battery system monitoring unit requires placing a long cable to the controller, which collects the signal and transmits it to the monitoring unit through the Ethernet network. The signal for direct output control needs to be transmitted to the controller via Ethernet, and the controller outputs and controls the field equipment. Once the Ethernet fails, it is impossible to obtain the fault information output to control the field equipment. Summary of the invention

[0004] The present invention aims at the problem of signal transmission of a monitoring unit and proposes an expansion module for a monitoring unit of a marine battery system. Through the expansion module and the monitoring unit, a digital input signal can be collected nearby and an output signal can be controlled according to software logic without placing a long-distance cable to a controller.

[0005] The technical scheme of the present invention is: a marine battery system monitoring unit expansion module, the expansion module is plug-connected with the monitoring unit RS232-C nine-pin interface through the RS232-C nine-pin interface, and the connection ports are TXD, RXD, RTS and SG respectively; the high and low level signals output by the monitoring unit are sent to the expansion module through the RTS and SG ports, the fault signal output by the expansion module is sent to the monitoring unit through the TXD and RXD ports, the +24V and 0V interfaces of the expansion module are connected to the 24V+ and 0V of the switching power supply; the output DO1+ end of the expansion module is connected to the +24V interface, the output DO1- end of the expansion module is connected to the 0V interface via a buzzer, and the input D+ and input D- ends are connected to external fault signal contacts;

[0006] The extension module includes a monitoring unit output signal conversion circuit and a monitoring unit input signal conversion circuit. The high or low level signal output by the monitoring unit is sent to the monitoring unit output signal conversion circuit through the RTS and SG ports, and the output DO1+ and output DO1- of the corresponding extension module are turned on or off; the fault signal contact closure or disconnection signal is sent through the input D+ and input D- of the monitoring unit input signal conversion circuit, and the TXD and RXD ports of the corresponding extension module output high or low levels.

[0007] The monitoring unit output signal conversion circuit is composed of diodes D11-D12, resistors R11-R15, optocoupler IC11, capacitor C11, amplifier A11 and relay K11. The monitoring unit output signal is connected to the input end of the optocoupler IC11 through the series resistor R15, the collector of the photosensitive transistor of the optocoupler IC11 is connected to the cathode of the diode D12, the anode of the diode D12 is connected to the +24V power supply interface of the expansion module, the collector of the photosensitive transistor of the optocoupler IC11 is connected to the 0V interface of the expansion module through the series voltage-dividing resistors R11 and R12, and the series connection point of the voltage-dividing resistors R11 and R12 is connected to the positive input electrode of the amplifier A11; the emitter of the photosensitive transistor of the optocoupler IC11 is connected to the positive input electrode of the amplifier A11 through the voltage-dividing resistor R11 and R12. Resistor R13 is connected to the reverse input pole of amplifier A11, and reverse diode D11 is connected in parallel at both ends of resistor R13. Capacitor C11 is connected between the 0V interface of the extension module and the reverse input pole of amplifier A11. Resistor R14 is connected between the 0V interface of the extension module and the emitter of the phototransistor of optocoupler IC11. Relay K11 coil is connected between the cathode of diode D12 and the output end of amplifier A11. Both ends of the normally open switch of relay K11 are connected to the output DO1+ and output DO1- of the extension module. When the phototransistor of IC11 optocoupler switches from on to off, the electric energy of capacitor C11 is quickly released through D11 and R14, and the output of amplifier A11 switches from 0V to 24V in a short time.

[0008] The monitoring unit input signal conversion circuit is composed of diodes D21-D22, resistors R21-R24, optocoupler IC21, capacitor C21, and relay K21; the extension module input D+ is connected to the cathode of diode D22, the extension module input D- is connected to the relay K21 coil between the cathode of the optocoupler IC21 light emitting diode, the cathode of the optocoupler IC21 light emitting diode is connected to the 0V interface of the extension module, the anode of the diode D22 is connected to one end of the normally open switch of the relay K21 and the cathode of the diode D12, the anode of the diode D12 is connected to the +24V interface of the extension module, the other end of the normally open switch of the relay K21 is connected to the anode of the light emitting diode of the optocoupler IC21 through the series resistors R22 and R23, and the diode D21 is connected in parallel to the resistor R22 ends, and the positive electrode of the diode D21 is connected to the series connection point of the resistors R22 and R23, the capacitor C21 is connected between the series connection point of the resistors R22 and R23 and the cathode of the light emitting diode of the optocoupler IC21, the resistor R21 is connected between the cathode of the diode D21 and the cathode of the 2nd-level optocoupler IC21, the collector of the phototransistor of the optocoupler IC21 is connected to the nine-pin interface TXD of the RS232-C of the monitoring unit through the resistor R24, and the emitter of the phototransistor of the optocoupler IC21 is connected to the nine-pin interface RXD of the RS232-C of the monitoring unit; when the relay K21 switches from being attracted to being released, the electric energy of the capacitor C21 is quickly released through D21 and R21, and the optocoupler IC21 switches from being on to being off in a short time.

[0009] The beneficial effect of the present invention is that the expansion module of the marine battery system monitoring unit of the present invention enables the marine battery system monitoring unit that does not have the digital quantity input acquisition and output control capability to have the capability of one digital quantity input acquisition and one digital quantity output control through the expansion module and the monitoring unit software programming, thereby effectively solving the problem of the local signal acquisition and control of the marine battery system monitoring unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of an expansion module of a marine battery system monitoring unit of the present invention;

[0011] Figure 2 This is the appearance diagram of the expansion module of the marine battery system monitoring unit of the present invention;

[0012] Figure 3 This is a typical application connection diagram of the expansion module of the marine battery system monitoring unit of the present invention. DETAILED DESCRIPTION

[0013] like Figure 1The schematic diagram of the expansion module of the marine battery system monitoring unit shown in the figure includes nine resistors R11-R15 and R21-R24, two capacitors C11 and C21, four diodes D11-D12 and D21-D22, one integrated operational amplifier A11, two photocouplers IC11 and IC22, and two relays K11 and K21. The expansion module is provided with a 24V power supply interface, a monitoring unit output signal conversion circuit, and a monitoring unit input signal conversion circuit. The nine-pin serial port interface at one end of the expansion module is connected to the nine-pin serial port module of the monitoring unit, and the three pairs of wiring terminals at the other end are used to connect the power supply, input signal, and output signal.

[0014] 1) Specific implementation of the monitoring unit output signal conversion circuit:

[0015] The output signal conversion circuit of the monitoring unit is composed of D11-D12, R11-R15, IC11, C11, A11, and K11. The monitoring unit transmits the output signal DO1 through RTS and SG in the RS232-C nine-pin interface. The output signal of the monitoring unit is connected to the input end of the second-level optocoupler IC11 through the series resistor R15, the collector of the photosensitive transistor of the first-level optocoupler IC11 is connected to the cathode of the diode D12, and the anode of the diode D12 is connected to the +24V power supply interface of the expansion module. The collector of the photosensitive transistor of the first-level optocoupler IC11 is connected to the 0V interface of the expansion module through the series voltage-dividing resistors R11 and R12, and the series connection point of the voltage-dividing resistors R11 and R12 is connected to the positive input pole of the amplifier A11; the emitter of the photosensitive transistor of the first-level optocoupler IC11 is connected to the reverse input pole of the amplifier A11 through the resistor R13. The input pole and both ends of the resistor R13 are connected in parallel with a reverse diode D11, a capacitor C11 is connected between the 0V interface of the extension module and the reverse input pole of the amplifier A11, a resistor R14 is connected between the 0V interface of the extension module and the emitter of the phototransistor of the first-level optocoupler IC11, a relay K11 coil is connected between the cathode of the diode D12 and the output end of the amplifier A11, and both ends of the normally open switch of the relay K11 are connected to the output DO1+ and output DO1- ends of the extension module, and the output DO1+ and output DO1- ends of the extension module are the output of the monitoring unit output signal conversion circuit.

[0016] When the monitoring unit output signal DO1 is high, the high-level signal is input into the reverse input pole of amplifier A11 through the first-level optocoupler IC11, resistor R13 and capacitor C11. The reverse input pole is high, and after comparison with the positive input pole of amplifier A11, 0V is output, relay K11 is energized, and the contact of relay K11 is closed. When the monitoring unit output signal DO1 is low, the reverse input pole of amplifier A11 is low, and after comparison with the positive input pole of amplifier A11, 24V is output, relay K11 is released, and the contact of relay K11 is opened.

[0017] The output logic of amplifier A11 is: when the reverse input voltage of A11 is greater than the forward input voltage, amplifier A11 works in the nonlinear region and the output voltage is 0V; when the reverse input voltage of A11 is less than the forward input voltage, amplifier A11 works in the nonlinear region and the output voltage is 24V.

[0018] Function of diode D11: When the phototransistor of IC11 optocoupler switches from on to off, the electric energy of capacitor C11 is quickly released through D11 and R14, and the output of amplifier A11 can be switched from 0V to 24V in a short time.

[0019] 2) Specific implementation of the monitoring unit input signal conversion circuit:

[0020] The input signal conversion circuit of the monitoring unit is composed of D21-D22, R21-R24, IC21, C21, and K21. The input D+ of the expansion module is connected to the cathode of the diode D22, the coil of the relay K21 is connected between the input D- of the expansion module and the cathode of the light-emitting diode of the 2nd-level optocoupler IC21, the cathode of the light-emitting diode of the 2nd-level optocoupler IC21 is connected to the 0V interface of the expansion module, the anode of the diode D22 is connected to one end of the normally open switch of the relay K21 and the cathode of the diode D12, the anode of the diode D12 is connected to the +24V interface of the expansion module, the other end of the normally open switch of the relay K21 is connected to the anode of the light-emitting diode of the 2nd-level optocoupler IC21 through the series resistors R22 and R23, and the diode D21 is connected in parallel to the voltage. Resistor R22 is connected at both ends, and the positive electrode of diode D21 is connected to the series connection point of resistors R22 and R23, capacitor C21 is connected between the series connection point of resistors R22 and R23 and the cathode of the light emitting diode of the 2nd-level optocoupler IC21, resistor R21 is connected between the cathode of diode D21 and the cathode of the light emitting diode of the 2nd-level optocoupler IC21, the collector of the photosensitive transistor of the 2nd-level optocoupler IC21 is connected to the nine-pin interface TXD of RS232-C of the monitoring unit through resistor R24, and the emitter of the photosensitive transistor of the 2nd-level optocoupler IC21 is connected to the nine-pin interface RXD of RS232-C of the monitoring unit.

[0021] The external input passive signal is isolated through relay K21. When the external external input passive signal is closed, that is, the extension module input D+ and D- are turned on, relay K21 is energized and attracted, the relay K21 contacts are closed, and the power supply turns on the 2nd-level optocoupler IC21 through R22 and R23, and the high-level signal is transmitted to the monitoring unit through the TXD and RXD signal ports in the RS232-C nine-pin interface. When the external external input passive signal is open, that is, the extension module input D+ and D- are disconnected, relay K21 is released, the relay K21 contacts are opened, and the low-level signal is transmitted to the monitoring unit through the TXD and RXD signal ports in the RS232-C nine-pin interface.

[0022] Function of diode D21: When relay K21 switches from energized to released, the electric energy of capacitor C21 is quickly released through D21 and R21, and the optocoupler of IC21 switches from on to off in a short time.

[0023] 3) Specific implementation of monitoring unit:

[0024] The monitoring unit software consists of software applications, display interfaces, I / O servers, alarm servers, and trend servers. The I / O server of the monitoring unit obtains the status of the input signal by monitoring the TXD and RXD signal ports in the RS232-C nine-pin interface. The status is used for interface display, alarm, and trend drawing. The I / O server of the monitoring unit outputs signals to the RTS and SG signal ports in the RS232-C nine-pin interface according to the logic of the software application, and outputs the output signals to the output terminals through the expansion module. The software application uses C# language to write the logic.

[0025] 4) Typical case implementation:

[0026] like Figure 2 The following is the appearance of the expansion module. One end is a standard RS232-C nine-pin interface (female), and the other end is 3 pairs of electrical connection terminals, one input status indicator and one output status indicator. The above two indications are indicated by the relay's own status indicator. If the relay is energized, the indicator light is on, otherwise the indicator light is off.

[0027] like Figure 3 The following is a typical application connection diagram of the expansion module of the marine battery system monitoring unit. The monitoring unit, expansion module, switching power supply, switch, and buzzer form a control box. The interface between the control box and the external system only has a power supply line and a network communication line. The switching power supply provides 24V power to the monitoring unit, expansion module, and switch. The monitoring unit exchanges data with the controller through the switch.

[0028] The expansion module is connected via the RS232-C nine-pin interface (female) and the monitoring unit RS232-C nine-pin interface (male), which are TXD (transmit data), RXD (receive data), RTS (request to send) and SG (ground signal). Terminals 1 and 2 of the expansion module are connected to the 24V+ and 0V of the switching power supply. Terminal 3 of the expansion module is connected to 24V+, and terminal 4 is connected to 0V through a buzzer. Once the monitoring unit software application determines that there is a fault, the buzzer will sound and light alarm. Terminals 5 and 6 of the expansion module are connected to the switch fault signal contacts. When the switch has a fault, the signal is transmitted to the monitoring unit, and the monitoring unit displays the fault and alarms.

Claims

1. A marine battery system monitoring unit expansion module, characterized in that: The expansion module is connected to the monitoring unit through the RS232-C nine-pin interface, and the connection ports are TXD, RXD, RTS and SG respectively; the high and low level signals output by the monitoring unit are sent to the expansion module through the RTS and SG ports, and the fault signals output by the expansion module are sent to the monitoring unit through the TXD and RXD ports. The +24V and 0V interfaces of the expansion module are connected to the 24V+ and 0V of the switching power supply; the output DO1+ end of the expansion module is connected to the +24V interface, the output DO1- end of the expansion module is connected to the 0V interface via the buzzer, and the input D+ and input D- ends are connected to the external fault signal contacts; The expansion module includes a monitoring unit output signal conversion circuit and a monitoring unit input signal conversion circuit. The high or low level signal output by the monitoring unit is sent to the monitoring unit output signal conversion circuit through the RTS and SG ports, and the output DO1+ and output DO1- of the corresponding expansion module are turned on or off; the fault signal contact closure or disconnection signal is sent through the input D+ and input D- of the monitoring unit input signal conversion circuit, and the TXD and RXD ports of the corresponding expansion module output high or low level; The monitoring unit output signal conversion circuit is composed of diodes D11-D12, resistors R11-R15, optocoupler IC11, capacitor C11, amplifier A11 and relay K11. The monitoring unit output signal is connected to the input end of the optocoupler IC11 through the series resistor R15, the collector of the photosensitive transistor of the optocoupler IC11 is connected to the cathode of the diode D12, the anode of the diode D12 is connected to the +24V power supply interface of the expansion module, the collector of the photosensitive transistor of the optocoupler IC11 is connected to the 0V interface of the expansion module through the series voltage-dividing resistors R11 and R12, and the series connection point of the voltage-dividing resistors R11 and R12 is connected to the positive input electrode of the amplifier A11; the emitter of the photosensitive transistor of the optocoupler IC11 is connected to the positive input electrode of the amplifier A11 through the voltage-dividing resistor R11 and R12. The resistor R13 is connected to the reverse input of the amplifier A11, and the two ends of the resistor R13 are connected in parallel with the reverse diode D11. The capacitor C11 is connected between the 0V interface of the expansion module and the reverse input of the amplifier A11. The resistor R14 is connected between the 0V interface of the expansion module and the emitter of the phototransistor of the optocoupler IC11. The coil of the relay K11 is connected between the cathode of the diode D12 and the output of the amplifier A11. The two ends of the normally open switch of the relay K11 are connected to the output DO1+ and the output DO1- of the expansion module. When the phototransistor of the IC11 optocoupler switches from on to off, the electric energy of the capacitor C11 is quickly released through D11 and R14. In a short time, the output of the amplifier A11 switches from 0V to 24V output. The monitoring unit input signal conversion circuit is composed of diodes D21-D22, resistors R21-R24, optocoupler IC21, capacitor C21, and relay K21; the extension module input D+ is connected to the cathode of diode D22, the extension module input D- is connected to the relay K21 coil between the cathode of the optocoupler IC21 light emitting diode, the cathode of the optocoupler IC21 light emitting diode is connected to the 0V interface of the extension module, the anode of the diode D22 is connected to one end of the normally open switch of the relay K21 and the cathode of the diode D12, the anode of the diode D12 is connected to the +24V interface of the extension module, the other end of the normally open switch of the relay K21 is connected to the anode of the light emitting diode of the optocoupler IC21 through the series resistors R22 and R23, and the diode D21 is connected in parallel to the resistor R22 ends, and the positive electrode of the diode D21 is connected to the series connection point of the resistors R22 and R23, the capacitor C21 is connected between the series connection point of the resistors R22 and R23 and the cathode of the light emitting diode of the optocoupler IC21, the resistor R21 is connected between the cathode of the diode D21 and the cathode of the 2nd-level optocoupler IC21, the collector of the phototransistor of the optocoupler IC21 is connected to the nine-pin interface TXD of the RS232-C of the monitoring unit through the resistor R24, and the emitter of the phototransistor of the optocoupler IC21 is connected to the nine-pin interface RXD of the RS232-C of the monitoring unit; when the relay K21 switches from being attracted to being released, the electric energy of the capacitor C21 is quickly released through D21 and R21, and the optocoupler IC21 switches from being on to being off in a short time.

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