Bidding solution for battery charging and discharging equipment

​ Solution Introduction

The power monitoring system is designed as the application monitoring layer 、 Information collection and processing layer 、 Data acquisition monitoring layer 、 Automatically maintain the execution layer .

Application monitoring layer ： By the server ,PC host ,HMI Composition and software system composition of the master station . The master station can monitor the data of multiple sites , Realize remote signaling , telemetering , Remote control and remote adjustment , Realize data collection of all battery monitoring and management hosts in the site , And the data is statistically stored 、 Statistics 、 analysis , Form various alarm information , report form , Curve chart and trend chart , Charge discharge curve , Automatic maintenance execution monitoring, etc .

The system must be able to observe the situation of the computer room at any time 、 It must be able to send out preventive alarm in time 、 Inform relevant personnel 、 Take measures to 、 Prevent accidents . In recent years , The market is facing the huge market demand of computer room monitoring , There are a large number of computer room monitoring manufacturers and corresponding products , However, with the continuous updating and refinement of customer requirements , The products of most manufacturers are far from meeting the needs of users .

The system has perfect detection function for the monitored equipment , Important operation data and parameter data of monitoring equipment , Effective analysis and storage of monitoring data ; Check the running state of the equipment , When a device failure is detected , To record the equipment failure ; Combined with the management measures of the computer room , Give processing information for various fault situations , Alarm prompt , Support a variety of fast and effective alarm methods ： Real time multimedia voice 、 Screen alarm 、 Telephone alarm 、 SMS alarm 、 Mail alarm 、 Sound and light alarm, etc , Help room management and maintenance personnel to understand the equipment situation in time . And provide alarm record storage , Inquire about , Printing function , It is convenient for fault analysis and diagnosis afterwards , And responsible personnel analysis . Diversified control functions , Provide alarm linkage control , It can make the fault equipment stop running automatically ; Timing control function , It can assist the user to adjust the running state of the equipment according to the time period .

Information collection and processing layer ： Monitor and manage the host 、 Field display unit 、 Current sensors 、 Environmental monitoring module 、 Total voltage monitoring unit group , Monitor the battery pack , Monitor the battery , Real time online estimation of remaining battery power SOC, Battery health SOH, And the strategy of performing equilibrium when the equilibrium degree is inconsistent , Handling of battery alarm , And realize historical data storage ; The communication interface is provided upwards and upwards 1 road RS485 port 、1 Road network entrance 、1 road CAN、3 road EBM mouth 、4 road DI、4 road DO, Supporting the standard Modbus-Rtu and Modbus-Tcp agreement , And SNMP agreement , Easy and fast access to third-party systems . The system shall be able to pass TCP/IP The Internet 、RS232/RS485、GPRS And other media to achieve the center room 、 Distributed in different areas of the machine room and other venues of the power environment equipment for effective centralized monitoring , Monitoring objects include power equipment .

Application collection layer technology features ： This scheme uses the shallow discharge process of the battery pack for regular and balanced maintenance , Analyze the electrode reaction parameters of battery discharge , Early detection of performance degradation of single battery in the battery pack , Make up for the current widespread use of 、 It depends on the hysteresis parameter that characterizes the change of battery performance -- internal resistance 、 To judge the battery failure without early warning . Due to the variety of electrode reaction parameters of the battery , Further analyze the types and causes of battery failure for the era of battery operation and maintenance big data , It provides the basis for technical feasibility and targeted maintenance . in addition , Intelligent self-learning software algorithm , It can accurately measure and correct the capacity attenuation during the battery life , To the new 、 The old battery provides the same accuracy of battery discharge residual capacity and discharge backup time estimation . At the same time, it adopts modern network transmission technology to design and realize a set of solutions suitable for battery monitoring , It can realize on-line monitoring of the internal resistance of different types of battery cells 、 voltage 、 Current and temperature and equalization management , Realize intelligent management of storage battery , It eliminates the tediousness of on-site maintenance detection by maintenance personnel , Improve the power supply quality and management level of the power supply system , Simple and practical 、 Less investment and other advantages .

At present, the most common working mode of lead-acid battery is standby power 、 There are three working modes of circulating energy storage and power startup . In each operating mode , Don't consider UPS Or the charger provided by the DC power supply 、 The core of lead-acid battery pack besides discharge management function BMS The functions are these three ： Single battery failure monitoring ; Monitoring of operating parameters to extend battery life 、 Analysis and maintenance （ Or maintenance advice ）; When the battery pack is running SOC（SOP） and SOH Calculation . The importance of fault prevention is higher than that of fault detection .

Data acquisition monitoring layer : The data acquisition layer consists of battery sensors 、 Connect the cable 、 Battery temperature sensor 、 Current sensor composition . The current is measured by open hall , There is no need to disassemble the cascade line , It can be easily accessed . All sensors are powered from the communication layer battery monitoring management host , No need to take power from the battery , Communication adoption RS485 Bus , Stable and reliable . The collector has its own operation 、 Warning lamp 、 Communication light , And display the address of battery monitoring module display 、 voltage 、 temperature 、 Internal resistance and working state display , Automatic equalization of unbalanced batteries , The corresponding sensor will immediately have a red light alarm , It can quickly locate the faulty battery in the machine room .

The maintenance and monitoring of storage battery is directly related to the operation and operation safety , Through the batch application of battery on-line monitoring system in the industry in recent years , It shows many advantages that conventional maintenance methods can not compare , It is proved that the traditional manual maintenance method is not enough to support the development of battery maintenance in the current power supply system . Use battery BMS The system can collect battery status information in real time , Effectively avoid power supply problems caused by battery failure , It has great advantages in security and economy . The battery on-line monitoring system has been put into use , Maintenance and management personnel can master the status of storage battery in each substation at any time , It greatly reduces the workload of regular on-site inspection , Labor and vehicle costs are greatly reduced . Reduce personal injury accidents , The battery on-line monitoring system has been put into use , The detection of battery parameters can be completed automatically , There is no need to go to the site for measurement and wiring , Reduce the possibility of personal injury accidents , At the same time, it also avoids the possibility of equipment damage caused by on-site inspection .

Automatically maintain the execution layer ： Automatic maintenance in hardware , The operation and maintenance system uses full online technology , The discharge capacity of battery pack is tested by AC inverter grid connected technology , When charging, use the intelligent three-stage charging technology, i.e. constant current 、 Constant voltage 、 Trickle fills the battery pack . Combined with the voltage internal resistance of a single battery 、 Temperature acquisition , Achieve accurate positioning of backward batteries . In terms of software , According to the needs of customers , Big data integration , Filter valid backup power data , It provides powerful data support for the operation, maintenance and management of the communication power supply system , Make power system management more transparent 、 Security 、 Stable 、 economic . When the discharge stop condition expires, it will automatically switch to steady current charging , The stable current charging circuit module in the system starts to work , End charging when the charging current is less than the floating charging current , The battery is directly restored online , The rectifier directly charges the battery . The power supply of the system is from the storage battery , Ensure that the system will not be affected by the city movie , The utility model can ensure the uninterrupted power supply of the user load after the mains power is cut off . The system is installed once , Lifetime earnings ; Simple installation , Maintenance convenience ; It can realize remote management 、 Planning task management 、 No personnel are required to operate on site , Liberate people , At the same time, energy conservation and emission reduction will be realized .

Monitor the host according to the preset maintenance interval , Automatically execute the periodic battery maintenance plan . Each discharge capacity is... Of the storage battery 20%. During battery discharge , Monitor the host to collect the discharge current of the battery 、 Monomer voltage , Battery pack voltage . And use built-in algorithms , Calculate the dynamic resistance of the single cell , Estimate battery health and remaining standby time , Generate battery analysis report . At the same time, monitor the host to monitor the AC system voltage , Once the AC power grid loses power , Immediately terminate the maintenance discharge task ; The monitoring host monitors that the battery is discharged to the preset capacity , Send maintenance discharge completion command to inverter , The inverter stops , Enter the idle state ; The monitoring host sends the contactor opening command , The inverter is disconnected from the power grid ; The AC system returns to normal , The system enters the normal state , The monitoring host generates maintenance reports and saves them , The maintenance discharge is completed .

Nuclear capacitive discharge ： It is basically consistent with the operation of maintenance discharge , The difference lies in the following: first, it complies with the State Grid and relevant regulations , Greater discharge power , Deeper discharge . The second is nuclear capacitive discharge , Generally, it is located at the clearance of transportation inspection , The start time of discharge is generally controlled manually .