Battery electric energy state monitoring device of energy collection system

Abstract

The utility model relates to the technical field of battery electric energy state monitoring devices, in particular to a battery electric energy state monitoring device of an energy collection system, which comprises a battery, a data acquisition end, a data transmission end, a data storage end and a data visualization end. The device effectively solves the problem that a current energy collection system lacks in the aspect of battery electric quantity monitoring, overcomes the limitation that the data transmission range of a traditional battery state monitoring system is limited, remarkably reduces the operation and maintenance overhead of the wireless sensor energy collection system, and guarantees the continuous and stable operation of sensor nodes.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery electric energy state monitoring device technical field especially an energy collection system battery electric energy state monitoring device. BACKGROUND

[0002] Wireless sensor network is built by numerous wireless sensor nodes, and is a kind of efficient data information acquisition technology, can monitor, perceive and gather environmental data in real time, and these data are transmitted through remote wireless communication means, and are widely applied in environmental monitoring, wisdom city construction, aerospace detection and multiple fields.Sensor nodes are often deployed in remote, harsh environment, or personnel is difficult to frequently access to replace battery scene, and environmental energy collection system becomes its main power supply mode.The system can convert solar energy, wind energy, temperature difference energy, vibration energy and various environmental energy into electric energy, and store in lithium battery for later use.In remote areas, solar energy is the main energy source, but at night or in continuous cloudy days, lithium battery reserve electric energy is needed to maintain system operation.If lithium battery is depleted and not replaced in time, the whole wireless sensor network may be unstable.

[0003] Therefore, it is crucial to design a monitoring system that can monitor battery status in remote areas and display battery remaining capacity in real time at a remote terminal.The system can issue a warning when the power is close to depletion, reminding staff to replace the battery in time to ensure smooth network operation.The traditional battery management system is limited by the limited local storage capacity and the inability to transmit data remotely, making it difficult to achieve remote real-time monitoring.The existing energy collection system state monitoring mainly focuses on battery charge and discharge control, MPPT control analysis, and whether the photovoltaic panel is normal by monitoring its working parameters (such as voltage, current, temperature, light intensity), but ignores direct monitoring of battery capacity.

[0004] Usually, the power monitoring system of energy storage lithium battery is directly connected to the host computer or relies on WiFi, ZigBee and other short-distance communication technology to transmit data, which has the disadvantage of limited transmission distance and cannot meet the monitoring needs of remote areas.Therefore, how to realize remote real-time monitoring of battery status to ensure the continuous and stable work of wireless sensor nodes has become a difficult problem to be solved. INVENTION CONTENTS

[0005] In order to overcome the existing deficiencies, the utility model provides a kind of energy collection system battery electric energy state monitoring device.

[0006] The utility model discloses a technical scheme that solves its technical problem is: a kind of energy collection system battery electric energy state monitoring device, including battery, data acquisition end, data transmission end, data storage end and data visualization end;The data acquisition end includes lithium battery voltage data acquisition module, current-voltage signal module and the temperature and humidity acquisition module placed in the battery on battery, and with lithium battery voltage data acquisition module, current-voltage signal module, temperature and humidity acquisition module electrically connected main control chip;The data transmission end selects NB-IoT communication module, with STM32 main control chip bidirectional communication, and with data storage end and establish communication connection;The data storage end uses Aliyun internet of things platform and accesses data visualization end;The data visualization end is based on Aliyun internet of things platform storage equipment transmission's thing model data interface.

[0007] According to another embodiment of the utility model, further include, the temperature and humidity acquisition module selects DHT11 digital temperature and humidity sensor, through single bus connection main control chip;The lithium battery voltage data acquisition module selects PCF8591 chip, through bus interface and main control chip communication;The current-voltage signal module selects the current acquisition module that LM358 operational amplifier and ICL7660 chip are made up of, through ADC bus and main control chip communication;The main control chip selects STM32L151RCT6, through UART serial port and NB-IoT communication module bidirectional communication.

[0008] According to another embodiment of the utility model, further include, the AIN0 pin of the PCF8591 chip as voltage input, SCL and SDA pin are respectively Clock pin and data pin, through bus interface and main control chip communication.

[0009] According to another embodiment of the utility model, further include, the VCC pin of the DHT11 digital temperature and humidity sensor is connected with 3.3V, GND pin is connected with ground, and DATA pin is connected with PB8 interface of main control chip.

[0010] According to another embodiment of the utility model, further include, the NB-IoT communication module wants to include NB-IoT module chip BC26, the chip BC26 is connected with the main serial port of main control chip through TXD and RXD pin, is connected with SIM card seat through SIM_VDD, SIM_RST, SIM_CLK and SIM_DATA pin, connects network indicator lamp through NETLIGHT pin, connects PSM mode through PSM pin, connects PWRKEY switch through PWRKEY pin, connects RESET reset circuit through RESET pin, connects NB-IoT sky seat through RF ANT pin, the NB-IoT sky seat is communicated with Aliyun internet of things platform bidirectionally through MQTT protocol.

[0011] According to another embodiment of the utility model, further include, the Aliyun internet of things platform is communicated with cloud database bidirectionally, and is communicated with data visualization end bidirectionally through HTTP protocol.

[0012] According to another embodiment of the utility model, further include, the data visualization end is visualized applet.

[0013] The utility model has the advantages that this device can accurately capture battery state information and environmental temperature and humidity data, and realizes stable and reliable transmission of data to Aliyun internet of things platform for saving at a long distance by using NB-IoT module, simultaneously, users can remotely access these collected data in real time through mobile phone WeChat applet, the device effectively solves the lack of battery power monitoring in current energy collection system, and overcomes the limitation of limited data transmission range of traditional battery state monitoring system, significantly reduces the operation and maintenance cost of wireless sensor energy collection system, and guarantees the continuous and stable operation of sensor node. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further explained in connection with the drawings and examples.

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2 It is the principle view of data acquisition end circuit;

[0017] Figure 3 It is the principle view of NB-IoT module. PREFERRED EMBODIMENT

[0018] As Figure 1This is a schematic diagram of the structure of this utility model, a battery power status monitoring device for an energy harvesting system, including a battery, a data acquisition end, a data transmission end, a data storage end, and a data visualization end; the data acquisition end includes a lithium battery voltage data acquisition module, a current-to-voltage signal module connected to the battery, and a temperature and humidity acquisition module placed on the battery side, as well as a main control chip electrically connected to the lithium battery voltage data acquisition module, the current-to-voltage signal module, and the temperature and humidity acquisition module; the data transmission end uses an NB-IoT communication module to communicate bidirectionally with the STM32 main control chip and establishes a communication connection with the data storage end; the data storage end uses the Alibaba Cloud IoT platform and is connected to the data visualization end; the data visualization end is based on the object model data interface transmitted by the storage device of the Alibaba Cloud IoT platform.

[0019] Specifically, the data acquisition end, based on the main control chip, uses a temperature and humidity acquisition module, a lithium battery voltage data acquisition module, and a current-to-voltage signal module to collect voltage and current data of the lithium battery in the energy harvesting system, as well as temperature and humidity data of the environment in which the acquisition device is located. Battery power data is calculated using the SOC algorithm built into the main control chip. The data transmission end establishes a communication connection with the Alibaba Cloud IoT platform through the NB-IoT communication module controlled by the main control chip. The main control chip reads data from the acquisition module and transmits it to the NB-IoT module via serial port before sending it to the cloud platform for storage and display. A serial-to-USB communication module is designed, allowing information to be printed out using a computer serial port debugging assistant for convenient system debugging. The data storage end uses the Alibaba Cloud IoT platform to build a cloud database. A rule engine is established to forward data uploaded by the device to the Alibaba Cloud database for storage. The cloud database can reliably store massive amounts of data and facilitates access to mobile mini-programs developed subsequently. The data visualization end is based on the object model data interface transmitted by the storage device on the Alibaba Cloud IoT platform. A WeChat mini-program access to the Alibaba Cloud platform has been designed, and a current data display interface, a historical data line chart interface, and a user login system have been developed, enabling remote, real-time, and online monitoring of battery status.

[0020] According to another embodiment of this utility model, it further includes: the temperature and humidity acquisition module is selected from a DHT11 digital temperature and humidity sensor, which is connected to the main control chip via a single bus; the lithium battery voltage data acquisition module is selected from a PCF8591 chip, which is connected to the main control chip via... The bus interface communicates with the main control chip; the current-to-voltage signal module is a current acquisition module composed of an LM358 operational amplifier and an ICL7660 chip, which communicates with the main control chip through the ADC bus; the main control chip is an STM32L151RCT6, which communicates bidirectionally with the NB-IoT communication module through the UART serial port.

[0021] Specifically, the current-voltage signal module circuit adopts a current acquisition module composed of an LM358 operational amplifier and an ICL7660 chip, the LM358 operational amplifier realizes current detection and amplification function, the ICL7660 chip provides negative power supply for the operational amplifier, finally, the acquired current signal is converted into a voltage signal which is read by the single-chip microcomputer, and the design also utilizes a 2A voltage boosting board as a voltage stabilizing power module, and the module is powered by a USB or a solar cell panel.

[0022] According to another embodiment of the utility model, further include, the AIN0 pin of PCF8591 chip as voltage input, SCL and SDA pin respectively as Clock pin and data pin, through Bus interface and host chip communication.

[0023] Specifically, the PCF8591 chip is an 8-bit A / D conversion low-power data acquisition chip supporting external 4-way voltage input acquisition, voltage input range 0~5V, and powered by a single power supply.

[0024] According to another embodiment of the utility model, further include, the VCC pin of DHT11 digital temperature and humidity sensor connects 3.3V, the GND pin is grounded, and the DATA pin is connected with the PB8 interface of the host chip.

[0025] Specifically, the DHT11 digital temperature and humidity sensor can measure temperature and humidity data at the same time, and the digital signal output has been calibrated, so that it can be read by the single-chip microcomputer without additional A / D conversion, the working voltage range is 3.3~5V, the temperature measurement range can reach 0~50℃, and the humidity measurement range is 20%RH~95%RH. An internal resistance type humidity sensing element is used for measuring humidity, and an NTC temperature measuring element is used for temperature measurement, and the two are connected with an excellent 8-bit single-chip microcomputer, and the high-integration system is more simple and fast to use.

[0026] According to another embodiment of the utility model, further include, the NB-IoT communication module includes an NB-IoT module chip BC26; the chip BC26 is connected with the main serial port of the host chip through TXD and RXD pins, connected with the SIM card seat through SIM_VDD, SIM_RST, SIM_CLK and SIM_DATA pins, connected with a network indicator lamp through a NETLIGHT pin, connected with a PSM mode through a PSM pin, connected with a PWRKEY switch through a PWRKEY pin, connected with a RESET reset circuit through a RESET pin, and connected with an NB-IoT antenna seat through an RF ANT pin; the NB-IoT antenna seat communicates with the Aliyun Internet of Things platform through the MQTT protocol.

[0027] Specifically, the master chip needs to control the chip BC26 through the UART serial port, the TXD and RXD interfaces of the chip BC26 are connected with the main serial port of the master chip, data can be communicated and transmitted through the UART main serial port, the PWRKEY power switch and the RESET reset circuit are designed, the booting and resetting functions can be realized by pulling down the pin level through the key, the PSM mode is a module power saving mode, when the module is in the power saving mode, the network is in a disconnected state, the module can be woken up by pulling down the PSM_EINT pin level, in order to realize the network connection function, the NB-IoT antenna and the USIM card seat and other peripheral circuit are also designed.

[0028] According to another embodiment of the present application, further comprising, the Aliyun Internet of Things platform and the cloud database are in bidirectional communication, and are in bidirectional communication with the data visualization end through the HTTP protocol.

[0029] According to another embodiment of the present application, further comprising, the data visualization end is a visualization applet.

[0030] Specifically, the data visualization applet has three interfaces, the first interface displays the battery data and the environmental temperature and humidity data at the current time, the second interface is a historical data visualization interface, the Echarts component library is introduced, and the data change at the historical time is dynamically represented by a line chart, and the third interface is a user login center, and the data is displayed only after the user identity information is verified.

[0031] Specific operation process, connect the data acquisition end to the lithium battery, insert the mobile Internet card into the SIM card slot of the data transmission end, power on the device, collect the voltage and current data of the lithium battery in the energy collection system, and collect the temperature and humidity data in the environment of the equipment, design the SOC algorithm in the embedded system of the master chip to calculate the battery capacity data, read the data of the collection module and transmit it to the NB-IoT module through the serial port, and then send it to the cloud platform for storage and display, the uploaded data is forwarded to the Aliyun database for storage and access to the applet, realizing remote, real-time and online monitoring of the battery state.

[0032] The above description is only illustrative but not restrictive, and those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all of them will fall within the protection scope of the present application.

Claims

1. An energy harvesting system battery power state monitoring device, characterized by, It includes a battery, a data acquisition end, a data transmission end, a data storage end and a data visualization end; the data acquisition end includes a lithium battery voltage data acquisition module, a current-to-voltage signal module and a temperature and humidity acquisition module placed on the side of the battery connected to the battery, and a main control chip electrically connected with the lithium battery voltage data acquisition module, the current-to-voltage signal module and the temperature and humidity acquisition module; the data transmission end selects an NB-IoT communication module, which communicates with the STM32 main control chip in both directions and establishes a communication connection with the data storage end; the data storage end uses an Ali cloud Internet of Things platform and accesses the data visualization end; the data visualization end is based on the Ali cloud Internet of Things platform to store the physical model data interface transmitted by the equipment.

2. The energy harvesting system battery state of charge monitoring device of claim 1, wherein, The temperature and humidity collection module selects a DHT11 digital temperature and humidity sensor, and is connected with a master control chip through a single bus. The bus interface communicates with the master control chip; the current-voltage signal module selects a current collection module composed of an LM358 operational amplifier and an ICL7660 chip, and communicates with the master control chip through an ADC bus; and the master control chip selects an STM32L151RCT6, and communicates with the NB-IoT communication module through a UART serial port.

3. The energy harvesting system battery state of charge monitoring apparatus of claim 2, wherein, The AIN0 pin of the PCF8591 chip is used as a voltage input, and the SCL and SDA pins are respectively used as The clock pin and the data pin of the PCF8591 chip are used as the clock pin and the data pin of the PCF8591 chip, respectively. The bus interface is used for communication with the master chip.

4. The energy harvesting system battery state of charge monitoring apparatus of claim 2, wherein, The VCC pin of the DHT11 digital temperature and humidity sensor is connected to 3.3V, the GND pin is connected to the ground, and the DATA pin is connected to the PB8 interface of the main control chip.

5. The energy harvesting system battery state of charge monitoring device of claim 1, wherein, The NB-IoT communication module includes an NB-IoT module chip BC26; the chip BC26 is connected with the main serial port of the main control chip through the TXD and RXD pins, connected with the SIM card seat through the SIM_VDD, SIM_RST, SIM_CLK and SIM_DATA pins, connected with the network indicator lamp through the NETLIGHT pin, connected with the PSM mode through the PSM pin, connected with the PWRKEY switch through the PWRKEY pin, connected with the RESET reset circuit through the RESET pin, and connected with the NB-IoT antenna seat through the RF ANT pin; the NB-IoT antenna seat communicates with the Ali cloud Internet of Things platform in both directions through the MQTT protocol.

6. The energy harvesting system battery state of charge monitoring device of claim 1, wherein, The Ali cloud Internet of Things platform communicates with the cloud database in both directions, and communicates with the data visualization end in both directions through the HTTP protocol.

7. The energy harvesting system battery state of charge monitoring device of claim 1, wherein, The data visualization end is a visual applet.

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