CN204679609U - A kind of storage battery monitoring device - Google Patents

Abstract

The utility model discloses a storage battery monitoring device, which comprises a storage battery measurement and control host, a storage battery acquisition module and a plurality of single storage battery detection modules. The storage battery acquisition module includes a main controller, a bus voltage sampling circuit, a floating charge current sampling circuit, The charge and discharge current sampling circuit and the first RS485 communication circuit; the battery cell detection module includes a battery terminal voltage detection circuit, a battery internal resistance detection circuit, a battery temperature detection circuit and a battery electromotive force detection circuit. By using the monitoring device, the parameters in various storage battery systems can be monitored, which can facilitate staff to perform reliable and effective maintenance on the storage battery system, so as to ensure the stable and safe operation of the storage battery system. The monitoring device of the utility model can be widely used in the field of storage batteries.

Description

A battery monitoring device

technical field

The utility model relates to a storage battery monitoring device, in particular to a device for monitoring multivariable parameters of a storage battery system.

Background technique

In order to avoid service interruption caused by power abnormalities, more and more occasions will use batteries to provide uninterrupted power supply. In order to ensure the safe and reliable operation of the backup battery power system, at present, a variety of different monitoring devices are designed to monitor the performance of the battery to achieve effective maintenance of the battery. However, these monitoring devices can only monitor Monitor single variable parameters, for example, only monitor internal resistance parameters or terminal voltage parameters. It can be seen that the monitoring function of the traditional monitoring device is single, and the monitoring of variable parameters is not comprehensive enough. Therefore, relying on the traditional monitoring device to realize the maintenance of the battery system has low reliability and effectiveness.

Utility model content

In order to solve the above technical problems, the purpose of this utility model is to provide a battery monitoring device with simple structure.

The technical solution adopted by the utility model is: a storage battery monitoring device, which includes a storage battery measurement and control host, a storage battery acquisition module, and a plurality of single storage battery detection modules. The storage battery acquisition module includes a main controller, a bus voltage sampling circuit, a floating charging current sampling circuit, charging and discharging current sampling circuit and the first RS485 communication circuit, the output end of the bus voltage sampling circuit, the output end of the floating charge current sampling circuit and the output end of the charging and discharging current sampling circuit are all connected with the main controller The input terminal is connected, and the main controller communicates with the battery measurement and control host and a plurality of single battery detection modules through the first RS485 communication circuit;

The single battery detection module includes a battery terminal voltage detection circuit, a battery internal resistance detection circuit, a battery temperature detection circuit, and a battery electromotive force detection circuit. The electromotive force detection circuits are all in communication connection with the main controller through the first RS485 communication circuit.

Further, the storage battery acquisition module further includes a low-frequency current sampling circuit, the output terminal of the low-frequency current sampling circuit is connected to the input terminal of the main controller.

Further, the storage battery acquisition module also includes a signal detection circuit, a fan, a buzzer, an indicating LED light and a signal generation circuit, the output end of the signal detection circuit is connected to the input end of the main controller, and the main controller The output end is respectively connected with the input end of the fan, the input end of the buzzer, the input end of the indicating LED light and the input end of the signal generating circuit.

Further, the main controller is also connected with a data storage.

Further, the bus voltage sampling circuit includes a resistance voltage divider circuit, the output end of the resistance voltage divider circuit is sequentially connected with an optocoupler isolation circuit, a signal amplification circuit and a filter circuit, and the output end of the filter circuit is connected to the main controller input connection.

Further, the storage battery measurement and control host includes a processor, and the processor is respectively connected with a touch screen, an Ethernet communication circuit, an IEC61850 protocol communication circuit, a GPS time synchronization circuit, a second RS485 communication circuit, an SD card, and a signal source module. The processor communicates with the main controller through the second RS485 communication circuit and the first RS485 communication circuit in turn.

The beneficial effects of the utility model are: the battery detection device includes a battery measurement and control host, a battery acquisition module, and a plurality of single battery detection modules, and the battery acquisition module includes a bus voltage sampling circuit, a floating charging current sampling circuit, and a charging and discharging circuit. The current sampling circuit, the single battery detection module includes a battery terminal voltage detection circuit, a battery internal resistance detection circuit, a battery temperature detection circuit and a battery electromotive force detection circuit, thus, the monitoring device of the utility model can not only monitor the battery Internal resistance, terminal voltage, temperature and electromotive force are monitored, and bus voltage, float current and charge and discharge current can also be monitored. Therefore, by adopting the monitoring device of the utility model, the staff can more comprehensively understand the current operating status of the battery system, which is beneficial to the staff to carry out reliable and effective maintenance on the battery system, and greatly improves the stability of the battery system operation and security.

Description of drawings

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural block diagram of a storage battery monitoring device of the present invention;

Fig. 2 is a structural block diagram of a specific embodiment of a storage battery monitoring device of the present invention;

Fig. 3 is a circuit structure block diagram of a specific embodiment of a bus voltage sampling circuit in a storage battery monitoring device of the present invention.

Detailed ways

As shown in Figure 1, a battery monitoring device includes a battery measurement and control host, a battery acquisition module, and a plurality of single battery detection modules, and the battery acquisition module includes a main controller, a bus voltage sampling circuit, and a floating charge current sampling circuit , charge and discharge current sampling circuit and the first RS485 communication circuit, the output end of the bus voltage sampling circuit, the output end of the floating charge current sampling circuit and the output end of the charge and discharge current sampling circuit are all connected to the input end of the main controller, The main controller communicates with the battery measurement and control host and a plurality of single battery detection modules through the first RS485 communication circuit;

The single battery detection module includes a battery terminal voltage detection circuit, a battery internal resistance detection circuit, a battery temperature detection circuit, and a battery electromotive force detection circuit. The electromotive force detection circuits are all in communication connection with the main controller through the first RS485 communication circuit.

The working principle of the above-mentioned monitoring device is as follows: the battery terminal voltage detection circuit, the battery internal resistance detection circuit, the battery temperature detection circuit and the battery electromotive force detection circuit in the single battery detection module respectively monitor the terminal voltage, internal resistance, temperature and electromotive force of the battery. detection, and then send the detected data to the main controller through RS485 communication; while the bus voltage sampling circuit, floating charge current sampling circuit, and charge and discharge current sampling circuit in the battery acquisition module respectively Sampling the floating charging current and charging and discharging current, and then sending the collected data to the main controller; the main controller sends the received data to the battery measurement and control host through RS485 communication, so that the staff can monitor the battery system View a variety of different parameters in . It can be seen that by using the monitoring device of the present invention, the staff can understand the changes of various parameters of the battery under different states (such as floating charge state, equal charge state, constant current discharge state), and the impact on the battery system The understanding of the operating status of the battery is more comprehensive, which is more conducive to the staff to come up with a more complete plan to carry out reliable and effective maintenance of the battery system, so as to ensure that the operation of the battery system is more stable and safe. In addition, since the monitoring device of the utility model can monitor many different variable parameters, there is no need to purchase multiple monitoring devices that can only monitor one variable parameter, thereby greatly reducing equipment cost investment and saving Equipment placement space.

As a further preferred embodiment, the battery measurement and control host includes a processor, and the processor is respectively connected with a touch screen, an Ethernet communication circuit, an IEC61850 protocol communication circuit, a GPS time synchronization circuit, a second RS485 communication circuit, an SD card, and a signal In the source module, the processor communicates with the main controller through the second RS485 communication circuit and the first RS485 communication circuit in turn.

A specific embodiment of the utility model

As shown in Figure 2, a battery monitoring device includes a battery measurement and control host, a battery acquisition module, and a plurality of single battery detection modules, and the battery acquisition module includes a main controller, a bus voltage sampling circuit, and a floating charge current sampling circuit , charge and discharge current sampling circuit and the first RS485 communication circuit, the output end of the bus voltage sampling circuit, the output end of the floating charge current sampling circuit and the output end of the charge and discharge current sampling circuit are all connected to the input end of the main controller, The main controller communicates with the battery measurement and control host and a plurality of single battery detection modules through the first RS485 communication circuit;

The single battery detection module includes a battery terminal voltage detection circuit, a battery internal resistance detection circuit, a battery temperature detection circuit, and a battery electromotive force detection circuit. The electromotive force detection circuits are all in communication connection with the main controller through the first RS485 communication circuit. The battery measurement and control host, battery acquisition module and multiple single battery detection modules are all of modular design.

Preferably, the storage battery acquisition module further includes a low-frequency current sampling circuit, the output terminal of the low-frequency current sampling circuit is connected to the input terminal of the main controller. Specifically, the low-frequency current sampling circuit may be a 10Hz current sampling circuit.

Preferably, the storage battery acquisition module also includes a signal detection circuit, a fan, a buzzer, an indicator LED light and a signal generation circuit, the output end of the signal detection circuit is connected to the input end of the main controller, and the main controller The output terminals of the fan are respectively connected with the input terminals of the fan, the input terminal of the buzzer, the input terminal of the indicating LED lamp and the input terminal of the signal generating circuit. Further, the signal detection circuit may be an ambient temperature parameter detection circuit.

Preferably, the main controller is also connected with a data storage. In addition, the battery acquisition module also includes a first switching power supply, which supplies power to the main controller.

Preferably, the main controller is also connected with an alarm signal output circuit.

Preferably, as shown in Figure 3, the bus voltage sampling circuit includes a resistor divider circuit, the output of the resistor divider circuit is sequentially connected to an optocoupler isolation circuit, a signal amplifier circuit and a filter circuit, the filter circuit The output terminal is connected with the input terminal of the main controller. The filter circuit in the bus voltage sampling circuit is a first-order filter circuit.

And for described floating charging current sampling circuit and charging and discharging current sampling circuit, they all comprise current transformer, signal amplifying circuit and filter circuit, the output end of described current transformer is connected with the input end of filter circuit by signal amplifying circuit , the output end of the filter circuit is connected to the input end of the main controller.

Preferably, the storage battery measurement and control host includes a processor, and the processor is respectively connected with a touch screen, an Ethernet communication circuit, an IEC61850 protocol communication circuit, a GPS time synchronization circuit, a second RS485 communication circuit, an SD card, and a signal source module. The processor is in communication connection with the main controller through the second RS485 communication circuit and the first RS485 communication circuit in turn. The use of SD cards for data storage can facilitate data storage and unified storage management, and it is also convenient for staff to read and view data. Specifically, as shown in Figure 2, the SD card should include a first SD card and a second SD card, and the first SD card is the main memory, and the second SD card is the backup memory, so when the main memory In the event of damage, the backup memory can also be used to store data, thereby ensuring uninterrupted storage of data. In addition, the processor can also transmit data to the background server through the Ethernet communication circuit or the IEC61850 protocol communication circuit, so that the staff or users can know the operation status of the storage battery in real time after logging into the background server. In this embodiment, the Ethernet communication circuit is an Ethernet communication circuit from MODBUS protocol to TCP/IP protocol.

As for the GPS time synchronization circuit, since the battery measurement and control host includes a GSP time synchronization circuit, it can ensure that the clock signal in the battery measurement and control host is more accurate. The battery measurement and control host also includes a second switching power supply, which supplies power to the processor.

The above is a specific description of the preferred implementation of the present utility model, but the utility model creation is not limited to the described embodiments, and those skilled in the art can also make various equivalents without violating the spirit of the present utility model. Modifications or replacements, these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (6)

1. a storage battery monitoring device, it is characterized in that: it comprises accumulator measurement and control host computer, accumulator acquisition module and multiple cell batteries detection module, described accumulator acquisition module comprises master controller, busbar voltage sample circuit, floating current sample circuit, charging and discharging currents sample circuit and a RS485 telecommunication circuit, the output terminal of described busbar voltage sample circuit, the output terminal of floating current sample circuit and the output terminal of charging and discharging currents sample circuit are all connected with the input end of master controller, described master controller carries out communication with accumulator measurement and control host computer and multiple cell batteries detection module respectively by a RS485 telecommunication circuit and is connected,

Described cell batteries detection module comprises accumulator voltage testing circuit, accumulator internal resistance testing circuit, battery temp testing circuit and storage battery kinetic potential testing circuit, and described accumulator voltage testing circuit, accumulator internal resistance testing circuit, battery temp testing circuit and storage battery kinetic potential testing circuit are all connected with master controller communication by a RS485 telecommunication circuit.

2. a kind of storage battery monitoring device according to claim 1, it is characterized in that: described accumulator acquisition module also comprises low-frequency current sample circuit, the described output terminal of low-frequency current sample circuit is connected with the input end of master controller.

3. a kind of storage battery monitoring device according to claim 1 or 2, it is characterized in that: described accumulator acquisition module also comprises signal deteching circuit, fan, hummer, indication LED lamp and signal generating circuit, the output terminal of described signal deteching circuit is connected with the input end of master controller, and the output terminal of described master controller is connected with the input end of the input end of fan, hummer, the input end of indication LED lamp and the input end of signal generating circuit respectively.

4. a kind of storage battery monitoring device according to claim 3, is characterized in that: described master controller is also connected with data-carrier store.

5. a kind of storage battery monitoring device according to claim 1 or 2, it is characterized in that: described busbar voltage sample circuit comprises resistor voltage divider circuit, the output terminal of described resistor voltage divider circuit is connected with optical coupling isolation circuit, signal amplification circuit and filtering circuit in turn, and the output terminal of described filtering circuit is connected with the input end of master controller.

6. a kind of storage battery monitoring device according to claim 1 or 2, it is characterized in that: described accumulator measurement and control host computer comprises processor, described processor is connected to touch-screen, ethernet communication circuit, IEC61850 protocol communication circuit, GPS time setting circuit, the 2nd RS485 telecommunication circuit, SD card and signal source module, and described processor is connected with master controller communication with a RS485 telecommunication circuit by the 2nd RS485 telecommunication circuit successively.