CN202372630U - Wireless sensor network monitoring device for states of photovoltaic power station storage batteries - Google Patents

Abstract

A wireless sensor network monitoring device for states of photovoltaic power station storage batteries belongs to the technical field of detection of the photovoltaic storage batteries. A storage battery temperature signal sampling module, a storage battery current sampling module, a storage battery voltage sampling module and a clock module are respectively connected with an input end of a control chip of each storage battery sensor node, the control chip is further connected with antennas. An antenna of each storage battery sensor node is connected with a wireless network coordinator through a routing node, and the wireless network coordinator is further in signal connection with a monitoring center. Temperature signals, current signals and voltage signals of the storage batteries are input into the control chips by each storage battery sensor node through each module, output to the antennas after being processed by a central processing unit (CPU), transmitted to the wireless network coordinator through the routing nodes and transmitted to the monitoring center through the wireless network coordinator. The working states of each photovoltaic power station storage battery can be known well timely through the monitoring center so as to facilitate the control of the working states.

Description

Photovoltaic power station battery status wireless sensor network monitoring device

technical field

The utility model belongs to the technical field of photovoltaic accumulator detection, in particular to a wireless sensor network monitoring technology for the state of an accumulator in a photovoltaic power station.

Background technique

With the application of photovoltaic power generation technology more and more widely, a large number of photovoltaic systems have been put into operation. The battery of the off-grid photovoltaic power station system is an important energy storage device, which involves the safe and stable operation of the off-grid photovoltaic system. The battery pack of the off-grid photovoltaic system is controlled by the charge and discharge controller for floating charge and discharge. In addition to conventional equalization or floating charge management, battery packs also need to inspect the daily working status of the battery pack. In China, most of the maintenance and performance evaluation of the battery pack stays on the traditional detection method. There are mainly once a year through the discharge test to judge the capacity of the battery; the characteristic test of outputting a large current; the terminal voltage measurement of a single battery, etc. These methods cannot monitor the state of the battery in working condition, and cannot find faulty batteries in time. This problem is not very obvious at the beginning of operation, and this problem will become more prominent after several years of operation. In view of the above reasons, off-grid photovoltaic systems often use wired methods to monitor the operating status of the battery pack in real time, mainly to inspect the terminal voltage of the battery, which cannot fully reflect the operating status of the battery. Therefore, it is very important to conduct real-time and effective online analysis and diagnosis of the battery pack's operating status and faults. With the rapid development of battery pack monitoring technology in my country in recent years, more wired monitoring equipment for battery voltage, current and internal resistance has been put into operation, but more cables are not conducive to installation and maintenance.

Contents of the invention

The purpose of the utility model is to provide a photovoltaic battery with a wireless sensor network monitoring device with high precision, strong anti-interference ability, ultra-low power consumption and stable operation.

The utility model comprises a monitoring center, a wireless network coordinator, a routing node and several storage battery sensor nodes; each storage battery sensor node includes a control chip, and the input end of the control chip is respectively connected to the temperature signal sampling module of the storage battery, the storage battery current The sampling module and the voltage sampling module of the battery are also connected to the clock module at the input end of the control chip, and the control chip is also connected to the antenna; the antenna of each battery sensor node is connected to the wireless network coordinator through the routing node, and the wireless network coordinator Signal connection with monitoring center.

Each battery sensor node processes the temperature, current, and voltage signals of the battery through the conditioning circuit of each module and inputs them to the AD conversion interface of the control chip, and outputs them to the antenna after being processed by the CPU. Then it is transmitted to the wireless network coordinator through the routing node, and then transmitted to the monitoring center by the wireless network coordinator, and the monitoring center can grasp the working status of the batteries of each photovoltaic power station in time for control.

The utility model provides a large amount of internal real-time information for the fault diagnosis of the battery through the design and development of the low-cost wireless sensor network for the battery pack and the single battery, and can solve the problems of high cable cost and difficult construction due to the existence of a large number of measuring points. Low sensitivity and difficult positioning of battery temperature and electrical parameter monitoring. On the basis of obtaining information such as battery temperature, voltage and current, through real-time detection, historical storage, statistics and reasoning of battery characteristics, it can solve the problems of insufficient battery terminal voltage, battery open circuit, obviously large internal resistance, insufficient capacity, etc. Instantaneous discharge current does not meet the load requirements and other faults. And it is of great significance to be able to accurately locate, prevent further expansion of faults, and improve the reliability and power supply quality of off-grid photovoltaic systems.

In addition, the control chip of the battery sensor node described in the utility model is also connected with a programming interface module.

The wireless network coordinator of the utility model includes a wireless radio frequency chip module with the JN5139 control chip as the core, an LPC2210 micro-control module, an Ethernet control module and an Ethernet interface module. The network control module is connected, and the Ethernet control module is connected with the Ethernet interface module.

The control chip of the battery sensor node described in the utility model is a JN5139 wireless control chip.

The temperature signal sampling module of the battery sensor node described in the utility model is composed of an SHT11 integrated chip and a corresponding conditioning circuit.

The current sampling module of the battery sensor node described in the utility model is composed of a Hall DC current sensor TBC10SY and a corresponding conditioning circuit.

The voltage sampling module of the battery sensor node described in the utility model is a voltage dividing resistor sampling module.

Description of drawings

Fig. 1 is a data flow block diagram of the utility model.

Fig. 2 is a structural principle block diagram of the wireless network coordinator of the present invention.

Fig. 3 is a structural block diagram of the storage battery sensor node of the present invention.

Detailed ways

As shown in Figure 1, the utility model includes a monitoring center a, a wireless network coordinator b, several routing nodes c and several storage battery sensor nodes d.

As shown in Figure 3, each storage battery sensor node d is provided with a control chip 8, the temperature signal sampling module 5 of the storage battery, the storage battery current sampling module 6, and the voltage sampling module 7 of the storage battery are respectively connected to the input end of the control chip 8. The input end of the control chip 8 is also connected to the clock module 9 , and the control chip is also connected to the antenna 10 and the programming interface module 11 .

The antennas of each storage battery sensor node d are signal-connected to the wireless network coordinator b through the routing node c, and the wireless network coordinator b is signal-connected to the monitoring center a.

As shown in Figure 2, the wireless network coordinator b includes a wireless radio frequency chip module 1 with the JN5139 control chip as the core, an LPC2210 micro-control module 2, an Ethernet control module 3 and an Ethernet interface module 4, and the wireless radio frequency chip module 1 passes through the LPC2210 The micro control module 2 is connected with the Ethernet control module 3 , and the Ethernet control module 3 is connected with the Ethernet interface module 4 .

The control chip 8 of the storage battery sensor node of the utility model is a JN5139 wireless control chip, the temperature signal sampling module 5 is composed of an SHT11 integrated chip and a corresponding conditioning circuit, and the current sampling module 6 is composed of a Hall DC current sensor TBC10SY and a corresponding conditioning circuit. The voltage sampling module 7 is a voltage dividing resistor sampling module.

The utility model designs a storage battery sensor node based on the high-performance, low-power wireless SOC module (JN5139) of the British Jennic Company; at the same time, it develops a coordinator node based on the LPC2210 microcontroller to form a wireless sensor network device. The sensor node of the battery pack provides a large amount of internal information for the internal operation status and fault diagnosis of the battery by obtaining parameters such as battery temperature, current, and voltage, and solves the problem of low sensitivity and difficult positioning of battery temperature and electrical parameter monitoring. The coordinator node completes the coordination work of the nodes collecting the information of the sensor nodes, and realizes the interface of the internet. Through real-time detection, historical storage, statistics and reasoning of battery operating characteristics, it is of great significance to accurately diagnose and locate, prevent further expansion of faults, and improve the reliability and power supply quality of off-grid photovoltaic systems.

Claims (7)

1. A wireless sensor network monitoring device for battery status in a photovoltaic power station, characterized in that it includes a monitoring center, a wireless network coordinator, a routing node, and a number of battery sensor nodes; each battery sensor node includes a control chip, and the input of the control chip The terminals are respectively connected to the temperature signal sampling module of the storage battery, the storage battery current sampling module, and the voltage sampling module of the storage battery. The input terminal of the control chip is also connected to the clock module, and the control chip is also connected to the antenna; the antenna of each storage battery sensor node passes The routing node is connected with the wireless network coordinator, and the wireless network coordinator is connected with the monitoring center by signal. 2. The wireless sensor network monitoring device for battery status of a photovoltaic power station according to claim 1, characterized in that the control chip of the battery sensor node is also connected to a programming interface module. 3. According to claim 1, the wireless sensor network monitoring device for battery status of a photovoltaic power station is characterized in that the wireless network coordinator includes a wireless radio frequency chip module with the JN5139 control chip as the core, an LPC2210 micro-control module, an Ethernet control module and Ethernet interface module, the wireless radio frequency chip module is connected with the Ethernet control module through the LPC2210 micro control module, and the Ethernet control module is connected with the Ethernet interface module. 4. The wireless sensor network monitoring device for battery status of a photovoltaic power station according to claim 1, wherein the control chip of the battery sensor node is a JN5139 wireless control chip. 5. The wireless sensor network monitoring device for battery status of a photovoltaic power station according to claim 1, characterized in that the temperature signal sampling module of the battery sensor node is composed of an SHT11 integrated chip and a corresponding conditioning circuit. 6. The wireless sensor network monitoring device for battery status of a photovoltaic power station according to claim 1, characterized in that the current sampling module of the battery sensor node is composed of a Hall DC current sensor TBC10SY and a corresponding conditioning circuit. 7. The wireless sensor network monitoring device for battery status of a photovoltaic power station according to claim 1, characterized in that the voltage sampling module of the battery sensor node is a voltage dividing resistor sampling module.

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