CN204030640U - Batteries novel maintenance monitoring intelligent device - Google Patents

Abstract

The utility model relates to the technical field of battery pack operation and maintenance monitoring, in particular to an intelligent device for remote operation and maintenance monitoring of battery packs, comprising an internal resistance test unit, a voltage acquisition unit and a temperature acquisition unit, an internal resistance acquisition unit, a voltage acquisition unit and a temperature acquisition unit The units are respectively connected to the control unit CPU through the serial port communication circuit, the battery pack is connected to the charger through the charging switch, and the constant current discharge load is connected through the discharge switch, the charging switch and the discharge switch are respectively connected to the control unit CPU through the switch detection circuit, and the switch control circuit and The control unit CPU is connected, and the control unit CPU is connected to the remote PC through the TCP/IP network data transmission system. The utility model changes the on-site operation and maintenance mode, realizes the remote monitoring of the battery pack, saves manpower, improves work efficiency, and ensures the normal operation of the battery pack.

Description

Smart device for remote operation and maintenance monitoring of battery packs

technical field

The utility model relates to the technical field of battery pack operation and maintenance monitoring, in particular to an intelligent device for remote operation and maintenance monitoring of battery packs. the

Background technique

In recent years, the scale of power grid companies, whether in electricity sales or in the construction of the number and scale of substations, has developed rapidly, and the unattended, automated, and intelligent substations have developed rapidly. However, substation battery inspections, regular checking charging and discharging, and condition maintenance are exhausting, and it is often difficult to complete the indicators required by relevant regulations every year. the

The main reasons for insufficient battery operation and maintenance are:

The existing monitoring and control technology of batteries cannot meet the needs of remote monitoring and operation and maintenance. Although the battery cell voltage and the battery pack terminal voltage have been monitored online, it is difficult to find out the potential accidents such as the poor operation of the battery itself and the increase in internal resistance by only using the voltage test method. the

The monitoring of battery state data cannot meet the needs of condition-based maintenance development. The dispatching automation system focuses on the monitoring of the operation status of substation equipment. Its functional positioning determines that it only cares about the operation and abnormal status of the equipment. The monitoring of the degradation process of the equipment itself is not within its functional scope. the

The inherent on-site operation and maintenance mode of batteries cannot meet the needs of professional development. For example, for the battery charge and discharge test, a battery charge and discharge test for 5 days, a substation with 2 sets of batteries, and 5 people for a test, to complete the charge and discharge test of all batteries, the workload is quite large. In the past ten years, the technical development of DC power supply has only been in terms of station equipment, phase-controlled charging devices have been gradually replaced by high-frequency switching power supplies, and there has been no development in intelligent monitoring and remote control technology. the

The existing operation and maintenance technology of the battery does not meet the requirements of countermeasures. In accordance with the provisions of the "Eighteen Major Power Grid Anti-Accident Measures of the State Grid Corporation", on the basis of the original regular checking discharge of the battery, the battery pack should be inspected every month, and the voltage data of the single battery should be recorded. The maintenance workload has doubled, objectively requiring the use of some efficient automation devices to replace manual work. the

Utility model content

In order to solve the deficiencies in the above technical problems, the purpose of this utility model is to provide an intelligent device for remote operation and maintenance monitoring of battery packs, which can change the on-site operation and maintenance mode, realize remote monitoring of battery packs, save manpower, and improve work efficiency. the

The technical scheme that the utility model adopts for solving its technical problem is:

The smart device for remote operation and maintenance monitoring of the battery pack includes an internal resistance testing unit, a voltage acquisition unit and a temperature acquisition unit, the bus tie switch is connected to two sections of bus bars, the internal resistance acquisition unit is connected to the battery pack through an internal resistance test line, and the voltage acquisition unit Connect to the battery pack through the voltage acquisition line, the internal resistance acquisition unit, the voltage acquisition unit and the temperature acquisition unit are respectively connected to the control unit CPU through the serial port communication circuit, the battery pack is connected to the charger through the charging switch, and connected to the constant current discharge load through the discharge switch , the bus switch is connected to the bus and the charging switch, the charging switch, the discharge switch, the bus tie switch and the bus switching switch are respectively connected to the control unit CPU through the switch detection circuit, the switch control circuit is connected to the control unit CPU, and the control unit CPU is connected through TCP/ The IP network data transmission system is connected to a remote PC. the

The utility model respectively collects the internal resistance of the storage battery monomer, the temperature of the battery cell, the terminal voltage of the storage battery group and the voltage of the battery cell in real time through the internal resistance test unit, the temperature acquisition unit and the voltage acquisition unit, and transmits the measured values to the value control unit through the serial port communication circuit. CPU, the control unit CPU judges whether the data it receives is within the normal range. Once abnormal data is found, it sends an alarm message to the remote PC through the TCP/IP network data transmission system and reports the abnormal item. At the same time, the control unit CPU connects to the alarm Device, on-site alarm. the

The utility model is also provided with a switch detection circuit and a switch control circuit, which can remotely operate the switches of the busbar, bus tie, charging device, and discharge device. The switch detection circuit detects the on-off state of each switch and transmits the detected state information The control unit CPU is transmitted to the remote PC through the TCP/IP network data transmission system, and displayed on the remote PC display. When discharging, the remote PC controls the control unit CPU through the TCP/IP network data transmission system, and then the The control unit CPU closes the discharge switch through the switch control circuit, and the constant current discharge load realizes the constant current discharge of the battery pack. The control unit CPU detects the remaining power of the battery pack in real time. After the discharge is completed, close the charging switch through the switch control circuit, and connect the charging device to start Charge. the

Preferably, the charging monitoring device has a liquid crystal display, a keyboard and an RS485 communication circuit, and is connected with each charging module through RS485, monitors the operating status and data of the charging device during the charging process in real time, and controls the power on and off of each charging module. Convert, set the floating charging parameters of the charging device, adjust the output voltage and current, and communicate with the host computer through the serial port. the

Preferably, the serial port communication circuit includes a photoelectric isolation circuit and an RS485 level conversion circuit, the output end of the photoelectric isolation circuit is connected to the input end of the RS485 level conversion circuit, and the output end of the RS485 level conversion circuit is connected to the signal input end of the control unit CPU. Then, the photoelectric isolation circuit includes a photoelectric isolation chip and an isolated power supply module. The RS485 level conversion circuit includes an RS485 level conversion chip. The RS485 conversion circuit converts the TTL level into an RS485 level. isolated from external circuits. the

Preferably, the switch detection circuit includes a current limiting resistor, a photoelectric isolation circuit, a pull-up resistor bank and an input IO port expansion chip, the charging switch is connected to two photoelectric isolation chips through a current limiting resistor, and the output terminals of the two photoelectric isolation chips are respectively Connect the pull-up resistor bank and the input IO port expansion chip. The input IO port expansion chip is connected to the IO data bus of the control unit CPU. Keep the signal line level consistent with the control unit CPU, and the signal input expansion chip inputs the switch state signal to the IO data bus of the control unit CPU to realize switch state acquisition. the

Preferably, the switch control circuit includes a latch circuit chip, a Darlington array chip and a relay, the input end of the latch circuit chip is connected to the IO data bus of the control unit CPU, the output end of the latch circuit chip is connected to the Darlington array chip The input terminal is connected, the Darlington array output terminal is connected to the relay, the relay is connected to the corresponding switch, the latch circuit chip is connected to the IO data bus of the control unit CPU, when a certain relay is controlled to operate, the corresponding output IO is set to 1, and the relay sucks Closed, the zero-setting relay is disconnected, thereby controlling the external switch to be disconnected or closed. the

Preferably, the temperature acquisition unit adopts a temperature sensor, which is crimped on the surface of the battery cell, collects the surface temperature information of the battery cell in real time, and transmits it to the control unit CPU. the

Preferably, the test lines of the internal resistance acquisition unit, the voltage acquisition unit and the temperature acquisition unit are respectively provided with self-recovery fuses to prevent short circuits from burning out the modules and ensure safe operation of the system. the

Preferably, the control unit CPU adopts STC90C58AD single-chip microcomputer, the system is reliable and stable, the main unit circuits are isolated from each other, and the anti-interference is strong. The software programming parts involved in realizing the detection and control functions of the above-mentioned control unit CPU are all existing technologies and belong to this field It is common knowledge of the technicians that the data transmission between the control unit CPU and the remote PC through the TCP/IP network data transmission system, the software programming part involved also belongs to the prior art, and there is no improvement in the use process. the

Compared with the prior art, the utility model has the following beneficial effects:

The utility model changes the on-site operation and maintenance mode, realizes the remote monitoring of the battery pack, saves manpower, and improves work efficiency. The terminal voltage and monomer voltage, internal resistance acquisition unit, voltage acquisition unit and temperature acquisition unit are equipped with self-recovery fuses on the sampling signal lines to avoid short circuit and burn the module to ensure the safe operation of the system. Through the switch detection circuit and switch control The circuit realizes the remote control of the switches in the system, realizes the automatic switching of the charging and discharging process of the battery pack, and ensures the normal operation of the battery pack. the

Description of drawings

Fig. 1 structural block diagram of the utility model. the

Figure 2 is a schematic diagram of the serial communication circuit. the

Figure 3 Schematic diagram of switch detection circuit. the

Figure 4 is a schematic diagram of the switch control circuit. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

As shown in Figure 1, the smart device for remote operation and maintenance monitoring of the battery pack includes an internal resistance test unit, a voltage acquisition unit, and a temperature acquisition unit, including an internal resistance test unit, a voltage acquisition unit, and a temperature acquisition unit. The section bus, the internal resistance acquisition unit is connected to the battery pack through the internal resistance test line, the voltage acquisition unit is connected to the battery pack through the voltage acquisition line, the internal resistance acquisition unit, the voltage acquisition unit and the temperature acquisition unit are respectively connected to the control unit CPU through the serial port communication circuit The battery pack is connected to the charger through the charging switch, and the constant current discharge load is connected through the discharge switch. The control unit CPU is connected, the switch control circuit is connected with the control unit CPU, and the control unit CPU is connected to the remote PC through the TCP/IP network data transmission system. the

As shown in Figure 2, the serial port communication circuit includes a photoelectric isolation circuit and an RS485 level conversion circuit, the output end of the photoelectric isolation circuit is connected to the input end of the RS485 level conversion circuit, and the output end of the RS485 level conversion circuit is connected to the control unit CPU signal The input terminals are connected, the photoelectric isolation circuit includes a photoelectric isolation chip and an isolated power supply module, the RS485 level conversion circuit includes an RS485 level conversion chip U1, the RS485 conversion circuit converts the TTL level into an RS485 level, and U2-U4 are photoelectric The isolation chip is connected to the voltage acquisition unit, internal resistance test unit and temperature acquisition unit respectively. U2, U3, U4 and the isolated power supply module U5 form a photoelectric isolation circuit, which separates the internal circuit of the device from the external circuit. R1-R6 are pull-up Resistors to keep the signal line level consistent with the control unit CPU, R7 and R8 are current limiting resistors, which together with TVS tubes V1 and V2 constitute the protection circuit of U1, and resistor R9 is a matching resistor to ensure the impedance matching of the RS485 communication line. the

As shown in Figure 3, the switch detection circuit includes multiple subunits, the number of subunits is the same as the total number of switches in the system, each subunit includes current limiting resistors R9-R16, photoelectric isolation circuit, pull-up resistor bank RP1 and input IO port The expansion chip U8, taking the charging switch as an example, the charging switch J1 is connected to two photoelectric isolation chips U6 and U7 through a current limiting resistor, and the output terminals of the two photoelectric isolation chips are respectively connected to the pull-up resistor row RP1 and the input IO port expansion chip U8, The input IO port expansion chip U8 is connected to the IO data bus of the control unit CPU. The connection mode of the discharge switch, bus tie switch, and bus switching switch is the same as that of the charging switch. The pull-up resistor row RP1 keeps the signal line level consistent with the control unit CPU , the signal input expansion chip inputs the switch state signal to the IO data bus of the control unit CPU to realize the switch state acquisition. the

As shown in Figure 4, the switch control circuit includes a latch circuit chip D1, a Darlington array chip D2, and relays. The number of relays is the same as the total number of switches in the system. The data bus is connected, the output terminal of the latch circuit chip D1 is connected to the input terminal of the Darlington array chip D2, the output terminal of the Darlington array chip D2 is connected to the relay, and the relay is connected to the corresponding switch, and the IO data of the latch circuit chip and the control unit CPU The bus is connected. When controlling the action of a certain relay, the corresponding output IO is set to 1, the relay is turned on, and the zero-setting relay is turned off, thereby controlling the opening or closing of the external switch. the

Among them, the control unit CPU is connected to the charging monitoring device. The charging monitoring device has a liquid crystal display, a keyboard and an RS485 communication circuit, and is connected to each charging module through RS485 to monitor the operating status and data of the charging device during the charging process in real time, and control the operation of each charging module. Switching on and off, switching between equalization and floating charging, setting the parameters of equalizing and floating charging of the charging device, adjusting the output voltage and current, and communicating with the host computer through the serial port; The surface temperature information of the battery cell is collected and sent to the control unit CPU; the test lines of the internal resistance collection unit, the voltage collection unit and the temperature collection unit are respectively equipped with self-recovery fuses to avoid short circuits and burn out modules to ensure safe operation of the system. the

The utility model respectively collects the internal resistance of the battery monomer, the temperature of the battery, the terminal voltage of the battery group and the voltage of the battery through the internal resistance test unit, the temperature acquisition unit and the voltage acquisition unit, and transmits the measured values to the control unit CPU through the serial port communication circuit. , the control unit CPU judges whether the data it receives is in the normal range. Once abnormal data is found, it sends an alarm message to the remote PC through the TCP/IP network data transmission system to report the abnormal items. At the same time, the control unit CPU connects to the alarm device , make an on-site alarm. the

The utility model is also provided with a switch detection circuit and a switch control circuit, which can remotely operate the switches of the busbar, bus tie, charging device, and discharge device. The switch detection circuit detects the on-off state of each switch and transmits the detected state information The control unit CPU is transmitted to the remote PC through the TCP/IP network data transmission system, and displayed on the remote PC display. When discharging, the remote PC controls the control unit CPU through the TCP/IP network data transmission system, and then the The control unit CPU closes the discharge switch through the switch control circuit, and the constant current discharge load realizes the constant current discharge of the battery pack. The control unit CPU detects the remaining power of the battery pack in real time. After discharging, close the charging switch through the switch control circuit, and connect the charging device to start Charge. the

The control unit CPU adopts STC90C58AD single-chip microcomputer, the system is reliable and stable, the main unit circuits are isolated from each other, and the anti-interference is strong. The software programming parts involved in realizing the detection and control functions of the above-mentioned control unit CPU are all existing technologies, which belong to those skilled in the art. Common sense, the data transmission between the control unit CPU and the remote PC through the TCP/IP network data transmission system, the software programming part involved also belongs to the prior art, and there is no improvement in the use process. the

Claims (8)

1. a batteries novel maintenance monitoring intelligent device, comprise internal resistance test cell, voltage acquisition unit and temperature collecting cell, it is characterized in that, bar coupler connects two sections of buses, internal resistance collecting unit is connected with batteries by internal resistance p-wire, voltage acquisition unit is connected with batteries by voltage acquisition line, internal resistance collecting unit, voltage acquisition unit is connected with control unit CPU by serial communication circuit respectively with temperature collecting cell, batteries connects charger by charge switch, connect constant-current discharge load by discharge switch, bus fling-cut switch connection bus and charge switch, charge switch, discharge switch, bar coupler and bus fling-cut switch are respectively by switch detection circuit connection control unit CPU, ON-OFF control circuit is connected with control unit CPU, control unit CPU connects long-range PC by TCP/IP network data transmission system.

2. batteries novel maintenance monitoring intelligent device according to claim 1, it is characterized in that, described serial communication circuit comprises photoelectric isolating circuit and RS485 level shifting circuit, photoelectric isolating circuit output and RS485 level shifting circuit input join, and RS485 level shifting circuit output and control unit cpu signal input join.

3. batteries novel maintenance monitoring intelligent device according to claim 2, is characterized in that, described photoelectric isolating circuit comprises photoelectric isolated chip and insulating power supply module, and RS485 level shifting circuit comprises RS485 level transferring chip.

4. batteries novel maintenance monitoring intelligent device according to claim 1, it is characterized in that, described switch detection circuit comprises current-limiting resistance, photoelectric isolating circuit, pull-up resistor row and input IO mouth extended chip, charge switch connects two photoelectric isolated chips by current-limiting resistance, the output of two photoelectric isolated chips connects respectively pull-up resistor row and input IO mouth extended chip, the IO data/address bus of input IO mouth extended chip connection control unit CPU, the connection mode of discharge switch, bar coupler, bus fling-cut switch is identical with charge switch.

5. batteries novel maintenance monitoring intelligent device according to claim 1, it is characterized in that, described ON-OFF control circuit comprises latch cicuit chip, darlington array chip and relay, latch cicuit chip input is connected with the IO data/address bus of control unit CPU, latch cicuit chip output is connected with darlington array chip input, darlington array output is connected with relay, and relay connects respective switch.

6. batteries novel maintenance monitoring intelligent device according to claim 1, it is characterized in that, described control unit CPU is also connected with charge monitoring device, charge monitoring device has liquid crystal display, keyboard and RS485 telecommunication circuit, be connected by RS485 with each charging module, running status and the data of charging device in monitoring charging process in real time, and control the switching on and shutting down of each charging module, all, floating charge conversions, the equal floating charge parameter of charging device is set, adjust output voltage electric current, and communicate by letter with host computer by serial ports.

7. batteries novel maintenance monitoring intelligent device according to claim 1, is characterized in that, described temperature collecting cell adopts temperature sensor, and temperature sensor is crimped on single battery surface.

8. batteries novel maintenance monitoring intelligent device according to claim 1, is characterized in that, on the p-wire of described internal resistance collecting unit, voltage acquisition unit and temperature collecting cell, is respectively equipped with resettable fuse.