Data acquisition rod and energy storage data acquisition system

Abstract

The utility model provides a data acquisition rod and an energy storage data acquisition system, the data acquisition rod comprises an external port, a serial port switching module, a receiving and generating level conversion module, a first communication module, a second communication module and a power supply module, the receiving and generating level conversion module comprises a first conversion unit and a second conversion unit, the first conversion unit is connected with the first communication module, the second conversion unit is connected with the second communication module, the serial port switching module comprises a control end, a first communication channel and a second communication channel, and the control end is connected with a control signal pin of the external port and used for controlling the first communication channel or the second communication channel to be conducted according to a received control signal. The first communication channel is connected with the first conversion unit, and the second communication channel is connected with the second conversion unit. The data acquisition rod supports multi-mode wireless data transmission including wireless communication and mobile communication, so that not only can short-distance local data interaction be realized, but also long-distance cloud data interaction can be realized.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of data acquisition, in particular to a data acquisition rod and an energy storage data acquisition system. Background Art

[0002] At present, with the rapid development of solar photovoltaic power generation technology and electrochemical energy storage technology, the market demand for photovoltaic inverters, energy storage converters, and photovoltaic storage hybrid inverters is strong. Some of these devices are installed in remote outdoor areas, some are installed in factory parks, and some are installed in users' indoor areas. In order to keep these inverters running in good condition, users or operation and maintenance parties generally use wireless data acquisition sticks to monitor their operating parameters in real time.

[0003] Current data acquisition sticks often use a single data transmission method to collect data. For example, a WIFI module, a GPRS module, or a 4G / 5G module is used as a wireless transmission method, and multi-mode data acquisition is not supported. In addition, a serial port is used for data exchange between the acquisition stick and the inverter system. The serial ports of inverter systems from different manufacturers are different. Therefore, one data acquisition stick is not compatible with inverter systems from multiple manufacturers. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a data acquisition rod and an energy storage data acquisition system to solve the problem of a single acquisition mode of the current data acquisition rod.

[0005] To solve the above technical problems, the utility model provides a data acquisition stick, including: an external port, a serial port switching module, a transceiver level conversion module, a first communication module, a second communication module and a power module, the transceiver level conversion module includes a first conversion unit and a second conversion unit, the first conversion unit is connected to the first communication module, and the second conversion unit is connected to the second communication module, the serial port switching module includes a control end, a first communication channel and a second communication channel, the control end is connected to the control signal pin of the external port, and is used to control the first communication channel or the second communication channel to be turned on according to the received control signal, the first communication channel is connected to the first conversion unit, and the second communication channel is connected to the second conversion unit.

[0006] Optionally, the serial port switching module includes a serial port control unit and a multi-way analog switch integrated unit, the serial port control unit includes the control end, a first enable signal sending end, and a second enable signal sending end, the multi-way analog switch integrated unit includes a first enable signal receiving end, a second enable signal receiving end, a first communication channel, and a second communication channel, the first enable signal sending end is connected to the first enable signal receiving end, and the second enable signal sending end is connected to the second enable signal receiving end, when the control signal received by the control end is high, the first enable signal is high, the second enable signal is low, and the first communication channel is turned on, when the control signal received by the control end is low, the first enable signal is low, the second enable signal is high, and the second communication channel is turned on.

[0007] Optionally, the serial port control unit includes: a first switch tube, a second switch tube, a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor, a fourth voltage-dividing resistor, and a first pull-up resistor, wherein one end of the first voltage-dividing resistor receives the control signal, and the other end is connected to the base of the first switch tube, the collector of the first switch tube is connected to the first pull-up resistor and sends the second enable signal, the other end of the first pull-up resistor is connected to a first level, the emitter of the first switch tube is grounded, one end of the third voltage-dividing resistor is connected to the collector of the first switch tube, and the other end is connected to the base of the second switch tube, the emitter of the second switch tube is connected to the first level, the collector of the second switch tube is connected to the fourth voltage-dividing resistor and sends the first enable signal and, the other end of the fourth voltage-dividing resistor is grounded, one end of the second voltage-dividing resistor is connected to the base of the first switch tube, and the other end is grounded.

[0008] Optionally, the external port includes a USB interface, a magnetic bead, a grounding resistor, a first impedance matching resistor and a second impedance matching resistor, a power pin of the USB interface is connected to an external power supply through the magnetic bead, two USB2.0 differential pins of the USB interface receive two USB data differential signals through the first impedance matching resistor and the second impedance matching resistor, one of the ultra-high-speed differential receiving pins of the USB interface receives a serial port receiving signal, one of the ultra-high-speed differential sending pins of the USB interface receives a serial port sending signal, and a signal ground pin of the USB interface receives the control signal.

[0009] Optionally, the USB interface is a USB 3.0 interface, a USB 3.1 interface, a USB 3.2 interface or a USB 4 interface.

[0010] Optionally, the first communication module is a wireless communication module, and the second communication module is a mobile communication module.

[0011] Optionally, the first conversion unit is used to convert the level of the serial port transceiver signal of the first communication module so that it matches the level of the serial port transceiver signal of the first communication channel of the serial port switching module, and the second conversion unit is used to convert the level of the serial port transceiver signal of the second communication module so that it matches the level of the serial port transceiver signal of the second communication channel of the serial port switching module.

[0012] Optionally, the first conversion unit includes a first anti-phase conversion unit and a first in-phase conversion unit;

[0013] The first inverting conversion unit includes a third switch tube, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor, and a second pull-up resistor, one end of the fifth voltage-dividing resistor receives a serial port receiving signal of the first communication channel, and the other end is connected to the base of the third switch tube, the collector of the third switch tube is connected to the second pull-up resistor and sends the serial port receiving signal of the first communication module, the emitter of the third switch tube is grounded, the other end of the second pull-up resistor is connected to the second level, one end of the sixth voltage-dividing resistor is connected to the fifth voltage-dividing resistor, and the other end is grounded;

[0014] The first in-phase conversion unit includes a fourth switch tube, a third pull-up resistor and a fourth pull-up resistor, and a first filter capacitor. One end of the fourth pull-up resistor is connected to the second level, and the other end is connected to the base of the fourth switch tube. The first filter capacitor is connected in parallel with the fourth pull-up resistor. The emitter of the fourth switch tube receives the serial port sending signal of the first communication module, the collector of the fourth switch tube is connected to the third pull-up resistor and sends the serial port sending signal of the first communication channel, and the other end of the third pull-up resistor is connected to the first level, and the first level is higher than the second level.

[0015] Optionally, the second conversion unit includes a second inverting conversion unit and a second in-phase conversion unit, the second inverting conversion unit includes a fifth switch tube, a seventh voltage-dividing resistor, an eighth voltage-dividing resistor, and a fifth pull-up resistor, one end of the seventh voltage-dividing resistor receives the serial port receiving signal of the second communication channel, and the other end is connected to the base of the fifth switch tube, the collector of the fifth switch tube is connected to the fifth pull-up resistor and sends the serial port receiving signal of the second communication module, the emitter of the fifth switch tube is grounded, the other end of the fifth pull-up resistor is connected to the third level, one end of the eighth voltage-dividing resistor is connected to the seventh voltage-dividing resistor, and the other end is grounded;

[0016] The second in-phase conversion unit includes a sixth switch tube, a sixth pull-up resistor, a seventh pull-up resistor, and a second filter capacitor. One end of the seventh pull-up resistor is connected to the third level, and the other end is connected to the base of the sixth switch tube. The second filter capacitor is connected in parallel with the seventh pull-up resistor. The emitter of the sixth switch tube receives the serial port sending signal of the second communication module, the collector of the sixth switch tube is connected to the sixth pull-up resistor and sends the serial port sending signal of the second communication channel, and the other end of the sixth pull-up resistor is connected to the first level, which is higher than the third level.

[0017] Optionally, a status indication unit is further included, and the status indication unit is respectively connected to the power module, the first communication module and the second communication module.

[0018] To solve the above technical problems, the utility model provides an energy storage data acquisition system, including an inverter system; the data acquisition rod as described above, used to collect data in the inverter system; and a first connector, used to connect the data acquisition rod and the inverter system.

[0019] Optionally, the energy storage data acquisition system also includes an energy storage system, including a first wireless communication module; a BMS connector, used to connect the inverter system with the energy storage system; wherein the first communication module of the data acquisition stick is communicatively connected to the first wireless communication module of the energy storage system, and the data acquisition stick is also used to collect battery data from the energy storage system.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] The data acquisition stick of the utility model supports multi-mode wireless data transmission, including wireless communication and mobile communication, and can realize both short-distance local data interaction and long-distance cloud data interaction. In addition, the external port of the data acquisition stick of the utility model is a USB interface, which supports data interaction with the inverter system using the USB communication protocol, and can make the same wireless data acquisition stick adapt to different inverter systems, such as photovoltaic inverters, energy storage inverters, photovoltaic storage hybrid inverters, etc., so as to realize multiple uses of one stick, fast transmission of one stick and universal use of one stick, and has good convenience, efficiency and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present utility model. In the accompanying drawings:

[0023] Figure 1 It is a block diagram of a data acquisition stick system according to an embodiment of the utility model.

[0024] Figure 2 It is a system block diagram of an energy storage data acquisition system according to an embodiment of the utility model.

[0025] Figure 3 yes Figure 1 A circuit diagram of an embodiment of an external port.

[0026] Figure 4A It is a circuit diagram of an embodiment of a serial port control unit.

[0027] Figure 4B It is a circuit diagram of an embodiment of a multi-channel analog switch integrated unit.

[0028] Figure 5A FIG. 4 is a circuit diagram of an embodiment of a first inverting conversion unit.

[0029] Figure 5B It is a circuit diagram of an embodiment of a first in-phase conversion unit.

[0030] Fig. 6A FIG. 4 is a circuit diagram of an embodiment of a second inverting conversion unit.

[0031] Figure 6B FIG. 4 is a circuit diagram of an embodiment of a second in-phase conversion unit.

[0032] Figure 7 It is a circuit diagram of an embodiment of a status indicating unit.

[0033] Figure 8 It is a system block diagram of an energy storage data acquisition system according to another embodiment of the utility model.

[0034] Fig. 9 yes Figure 8 A system block diagram of an embodiment of a main control module of a mid-inverter system. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0036] Figure 1 1 is a system block diagram of a data acquisition stick according to an embodiment of the present utility model. Figure 1As shown, the data acquisition stick 10 includes an external port 11, a serial port switching module 12, a transceiver level conversion module 13, a first communication module 14, a second communication module 15 and a power module 16. The transceiver level conversion module 13 includes a first conversion unit 131 and a second conversion unit 132. The first conversion unit 131 is connected to the first communication module 14, and the second conversion unit 132 is connected to the second communication module 15. The serial port switching module 12 includes a control terminal A, a first communication channel B1 and a second communication channel B2. The control terminal A is connected to the control signal pin of the external port 11, and is used to control the first communication channel B1 or the second communication channel B2 to be turned on according to the received control signal. The first communication channel B1 is connected to the first conversion unit 131, and the second communication channel B2 is connected to the second conversion unit 132. The power module 16 is connected to the external port 11, and the power module 16 supplies power to the first communication module 14 and the second communication module 15.

[0037] Optionally, the first communication module is a wireless communication module, and the wireless communication module includes but is not limited to a WIFI module, a Bluetooth module and a Zigbee module.

[0038] Optionally, the second communication module is a mobile communication module, and the mobile communication module includes but is not limited to a 4G module or a 5G module. The following embodiments are described by taking the first communication module as a WIFI module or a Bluetooth module, denoted as a WIFI / Bluetooth module, and the second communication module as a 4G module as an example.

[0039] Optionally, the data acquisition stick 10 can be used to collect energy storage data in the inverter system. Figure 2 1 is a system block diagram of an energy storage data acquisition system according to an embodiment of the present utility model. Figure 2 As shown, the energy storage data acquisition system 200 includes a data acquisition stick 10, a USB connector 20 and an inverter system 30. The data acquisition stick 10 is connected to the inverter system 30 via the USB connector 20.

[0040] Figure 3 yes Figure 1 A circuit diagram of an embodiment of an external port. Figure 3As shown, the external port 11 includes a USB interface J1, a magnetic bead L1, a resistor R4, a resistor R16 and a resistor R17. The metal shielding shell of the USB interface J1 is grounded through the resistor R4. The power pin (pin 1) of the USB interface J1 supplies the 5V power provided by the inverter system through the USB connector to the data acquisition stick through the magnetic bead L1. The two USB2.0 differential pins (pins 2 and 3) of the USB interface J1 are connected to the impedance matching resistors R16 and R17, and the USB HOST data differential signal transmitted by the inverter system through the USB connector is introduced into the data acquisition stick, and the signal network names are recorded as USB_DM and USB_DP respectively. Pins 5, 9 and 7 of the USB interface J1 connect the serial port receiving and sending data and special IO control signals transmitted by the inverter system through the USB connector to the data acquisition stick, and the signal network names are HOST_RXD, HOST_TXD and HOST_nRST respectively. When HOST_nRST is logic low, the mobile communication module can be selected for serial communication; when it is logic high, the wireless communication module can be selected for serial communication.

[0041] Optionally, the USB interface J1 is a USB 3.0 interface, a USB 3.1 interface, a USB 3.2 interface or a USB 4 interface.

[0042] Optionally, the serial port switching module 12 includes a serial port control unit 121 and a multi-channel analog switch integration unit 122 . Figure 4A 1 is a circuit diagram of an embodiment of a serial port control unit. Figure 4A As shown, the serial port control unit 121 includes a switch tube Q2, a switch tube Q3, a resistor RM4, a resistor RM5, a resistor RM6, a resistor RM7 and a resistor RM8. Among them, one end of the resistor RM4 receives the control signal HOST_nRST, and the other end is connected to the base of the switch tube Q2, the collector of the switch tube Q2 is connected to the resistor RM7 and sends the second enable signal 4G_SEL, and the other end of the resistor RM7 is connected to the first level (+5V). The emitter of the switch tube Q2 is grounded GND. One end of the resistor RM6 is connected to the collector of the switch tube Q2, and the other end is connected to the base of the switch tube Q3, and the emitter of the switch tube Q3 is connected to the first level (+5V). The collector of the switch tube Q3 is connected to the resistor RM8 and sends the first enable signal WIFI / BT_SEL, and the other end of the resistor RM8 is grounded. One end of the resistor RM5 is connected to the base of the switch tube Q2, and the other end is grounded.

[0043] Figure 4B FIG. 1 is a circuit diagram of an embodiment of a multi-channel analog switch integrated unit. Figure 4B As shown, the serial port switching unit 122 includes a four-way analog switch integrated chip U5 and a power decoupling capacitor C13. Figure 4A and 4BWhen the received control signal HOST_nRST is logic low, the second enable signal 4G_SEL is logic high, and the first enable signal WIFI / BT_SEL is logic low; conversely, when the received control signal HOST_nRST is logic high, the second enable signal 4G_SEL is logic low, and the first enable signal WIFI / BT_SEL is logic high, and the second enable signal 4G_SEL and the first enable signal WIFI / BT_SEL are mutually exclusive signals. When the first enable signal WIFI / BT_SEL is high, channel 2 (IN2 and OUT2) and channel 3 (IN3 and OUT3) of U5 are selected, and the transceiver level conversion signal WIFI / BT_TXD2 of the WIFI / Bluetooth module (a transmitting signal for the WIFI / Bluetooth module) is selected as the serial port receive data signal HOST_RXD transmitted by the USB connector. At the same time, the serial port transmit data signal HOST_TXD transmitted by the USB connector is selected to the transceiver level conversion signal WIFI_RXD2 of the WIFI / Bluetooth module (a receiving signal for the WIFI / Bluetooth module).

[0044] When the second enable signal 4G_SEL is high, channel 1 (IN1 and OUT1) and channel 4 (IN4 and OUT4) of U5 are selected, and the transceiver level conversion signal 4G_TXD2 of the 4G module (a transmitting signal for the 4G module) is selected as the serial port receive data signal HOST_RXD transmitted by the USB connector. At the same time, the serial port transmit data signal HOST_TXD transmitted by the USB connector is selected to the transceiver level conversion signal 4G_RXD2 of the 4G module (a receiving signal for the 4G module).

[0045] Optionally, the first conversion unit 131 includes a first anti-phase conversion unit 1311 and a first in-phase conversion unit 1312 . Figure 5A FIG. 1 is a circuit diagram of an embodiment of the first inverting conversion unit. Figure 5A As shown, the first inverting conversion unit 1311 includes a switch tube Q4, a resistor R9, a resistor R10 and a resistor R8. One end of the resistor R9 receives WIFI / BT_RXD2, and the other end is connected to the base of the switch tube Q4. The collector of the switch tube Q4 is connected to the resistor R8 and sends WIFI_RXD, and the emitter of the switch tube Q4 is grounded GND. The other end of the resistor R8 is connected to the second level, and in this embodiment, the second level is 3.3V. One end of the resistor R10 is connected to the resistor R9, and the other end is grounded GND. Through the first inverting conversion unit 1311, the WIFI / BT_RXD2 from the first communication channel of the serial port switching module 12 is a 5V logic level signal, which is inverted into a 3.3V logic signal WIFI_RXD and sent to the WIFI / Bluetooth module.

[0046] Figure 5BFIG. 1 is a circuit diagram of an embodiment of the first in-phase conversion unit. Figure 5B As shown, the first in-phase conversion unit 1312 includes a switch tube Q5, a resistor R12, a resistor R11 and a filter capacitor C15. One end of the resistor R11 is connected to the first level, and the other end is connected to the base of the switch tube Q5. In this embodiment, the first level is 3.3V. The filter capacitor C15 is connected in parallel with the resistor R11. The emitter of the switch tube Q5 receives WIFI_TXD, and the collector of the switch tube Q5 is connected to the resistor R12 and sends WIFI / BT_TXD2. The other end of the resistor R12 is connected to the first level, and in this embodiment, the first level is 5V. Through the first in-phase conversion unit 1312, the 3.3V logic signal WIFI_TXD from the WIFI / Bluetooth module is converted in phase into a 5V logic signal WIFI / BT_TXD2 and sent to the first communication channel of the serial port switching module 12.

[0047] Optionally, the second conversion unit 132 includes a second anti-phase conversion unit 1321 and a second in-phase conversion unit 1322 . Fig. 6A FIG. 1 is a circuit diagram of an embodiment of the second inverting conversion unit. Fig. 6A As shown, the second inverting conversion unit 1321 includes a switch tube Q9, a resistor R28, a resistor R29, and a resistor R30. One end of the resistor R28 receives 4G_RXD2, and the other end is connected to the base of the switch tube Q9. The collector of the switch tube Q9 is connected to the resistor R30 and sends 4G_RXD, and the emitter of the switch tube Q9 is grounded GND. The other end of the resistor R30 is connected to the third level. In this embodiment, the third level is VDD_EXT. One end of the resistor R29 is connected to the resistor R28, and the other end is grounded GND. Through the second inverting conversion unit 1321, the 4G_RXD2 from the second communication channel of the serial port switching module 12 is a 5V logic level signal, which is inverted into a VDD_EXT logic level signal 4G_RXD and sent to the 4G module.

[0048] Figure 6B FIG. 1 is a circuit diagram of an embodiment of a second in-phase conversion unit. Figure 6BAs shown, the second in-phase conversion unit 1322 includes a switch tube Q10, a resistor R32 and a resistor R31, and a filter capacitor C28. One end of the resistor R31 is connected to the third level, and the other end is connected to the base of the switch tube Q10. In this embodiment, the third level is VDD_EXT. The filter capacitor C28 is connected in parallel with the resistor R31. The emitter of the switch tube Q10 receives 4G_TXD, and the collector of the switch tube Q10 is connected to the resistor R32 and sends 4G_TXD2. The other end of the resistor R32 is connected to the first level, and in this embodiment, the first level is 5V. Through the second in-phase conversion unit 1322, the VDD_EXT logic level signal 4G_TXD from the 4G module is in-phase converted into a 5V logic signal 4G_TXD2 and sent to the second communication channel of the serial port switching module 12.

[0049] In summary, the transceiver level conversion unit 13 is used to convert the level of one WIFI / BT serial port transceiver signal to match the level of one group of serial port transceiver signals of the serial port switching module; and also to convert the level of one 4G serial port transceiver signal to match the level of another group of transceiver signals of the serial port switching module.

[0050] Optionally, the 4G module includes a 4G integrated circuit, a 4G antenna and a SIM card. Optionally, the data acquisition stick 10 also includes a shell, and all components except the 4G antenna are located inside the shell.

[0051] Optionally, the data acquisition stick 10 further includes a status indicating unit. Figure 7 1 is a circuit diagram of an embodiment of a status indicating unit. Figure 7 As shown, the status indication unit includes current limiting resistors RM1, RM2, RM3, voltage dividing resistors R5 and R6, indicator lights LD1, LD2, LD3 and transistor Q1. When the USB connector is connected to the inverter system with power, the data acquisition stick obtains the working power supply +5V, which will light up the indicator light LD1. When the WIFI / Bluetooth module establishes a WIFI connection or Bluetooth connection with other devices, the WIFI / BT_LINK signal is pulled low, which will light up the indicator light LD2. When the 4G module establishes a connection with the 4G network, the 4G_LINK signal is set high, which will drive the transistor Q1 to turn on, so that the indicator light LD3 is lit.

[0052] Figure 8It is a system block diagram of an energy storage data acquisition system of another embodiment of the utility model. As shown in Figure 8, the energy storage data acquisition system 800 includes a wireless data acquisition stick 1, a USB connector 2 and an inverter system 3. The wireless data acquisition stick 1 includes a USB interface 1-1, a power module 1-2, a WIFI / Bluetooth module 1-3, a 4G module 1-4, a WIFI / Bluetooth antenna 1-5, a 4G antenna 1-6, an M2M SIM card 1-7, a status indication unit 1-8, a transceiver level conversion unit 1-9, a serial port switching selector 1-10, and its plastic body shell, etc. (the 4G antenna is outside the plastic body shell of the wireless data acquisition stick). The USB connector 2 includes a USB A-type female socket 2-1, a transfer circuit board 2-2 and a 9PIN single-row socket 2-3. The inverter system 3 includes a main control module 3-1, a power conversion unit 3-2, and an AC / DC input and output circuit 3-3. In addition to the core MCU monitoring circuit 3-1-1, the main control module of the inverter system also includes a 9PIN single-row socket 3-1-2, an 8PIN single-row socket 3-1-3, an XPIN double-row IDC bull-horn socket 3-1-5, a YPIN double-row IDC bull-horn socket 3-1-6, and a power socket 3-1-4 connected to the outside. The main control module 3-1 of the inverter system is connected to the power conversion unit 3-2 through the XPIN double-row IDC bull-horn socket 3-1-5 and the power socket 3-1-4; it is connected to the AC / DC input and output circuit 3-3 through the YPIN double-row IDC bull-horn socket 3-1-6 and the power socket 3-1-4. The USB connector 2 is usually installed on the panel of the inverter system 3, and the USBA type female socket of the USB connector is seamlessly connected to the USB interface of the wireless data acquisition stick. The 9PIN single-row socket 2-3 of the USB connector and the 9PIN single-row socket 3-1-2 of the main control module of the inverter system are connected through a flat cable.

[0053] When the inverter is an energy storage inverter or a photovoltaic storage hybrid inverter, a BMS connector 4 is also installed on the inverter system panel, through which it is connected to the secondary circuit of the battery energy storage system 5. The BMS connector 4 includes an 8PIN single-row socket 4-1, a transfer circuit board 4-2 and an 8PIN terminal block 4-3. The battery energy storage system 5 usually includes a battery management unit 5-1, a battery pack 5-2 and a high-voltage control circuit 5-3. The battery management unit 5-1 includes an 8PIN terminal block 5-1-1, a battery monitoring module 5-1-2, a WIFI / Bluetooth module 5-1-4 and a WIFI / Bluetooth antenna 5-1-5. The 8PIN single-row socket 4-3 of the BMS connector 4 is connected to the 8PIN single-row socket 3-1-3 of the inverter main control module through a cable. The 8PIN terminal block 4-1 of the BMS connector 4 is connected to the 8PIN terminal block 5-1-1 of the battery energy storage system through a cable.

[0054] The AC / DC input circuit 3-3 of the inverter system is externally connected to the photovoltaic PV components, the AC grid Grid, and the power load Load. When the inverter is an energy storage inverter or a photovoltaic storage hybrid inverter, the high-voltage DC power supply provided by the battery pack of the battery energy storage system is also connected to the AC / DC input circuit of the inverter system through the high-voltage control loop. The inverter system 3 can establish a wireless connection with the WIFI / Bluetooth antenna of the battery management unit of the battery energy storage system through the WIFI / Bluetooth antenna of the wireless data acquisition stick, and can obtain the battery pack's battery cell operating status data, and can send the battery management system BMS upgrade firmware. The wireless data acquisition stick can collect more inverter system application data at the same time, in addition to the inverter's own operating status data, it can also be application data from an external battery energy storage system.

[0055] The 4G module of the wireless data acquisition stick can upload the operating status data of the inverter system and the battery energy storage system to the cloud server through the 4G antenna and the cloud network, and can also download their respective upgrade firmware through the cloud server and the cloud network. The utility model can enable the same wireless data acquisition stick to be used in multiple inverter system application scenarios, and can realize both short-distance local data interaction and long-distance cloud data interaction.

[0056] Fig. 9 yes Figure 8 A system block diagram of an embodiment of a main control module of an inverter system. Fig. 9 As shown, the main control module 3-1 of the inverter system includes a monitoring MCU, a control MCU, an isolation power supply, two sets of 5V and 3.3V power supplies, and related peripheral interface circuits. The 5V and 3.3V power supplies for the monitoring MCU are the same as the 5V and 3.3V power supplies for the control MCU. Its front-stage inputs are isolated from each other through an isolation power supply module, and its power supply comes from the power socket. The monitoring MCU and the control MCU perform bidirectional data communication through their respective UART controllers or SPI controllers and high-speed optocoupler isolation circuits.

[0057] The serial port transceiver data signal and IO signal from a UART controller and GPIO controller inside the monitoring MCU are collected together with the USB differential data signal from the USB HOST controller and the 5V of the 5V power supply through the logic level conversion circuit to the 9PIN single-row socket connected to the USB connector. The CAN data signal from the CAN controller inside the monitoring MCU is collected together with the serial port transceiver data signal and IO signal from another UART controller and GPIO controller through the RS485 transceiver and the IO signal from the third GPIO controller through the ordinary optocoupler isolation circuit to the 8PIN single-row socket connected to the BMS connector.

[0058] The control MCU performs signal conditioning and strobe sampling on the analog signals from the XPIN double-row IDC bull-horn socket and the YPIN double-row IDC bull-horn socket by controlling the ADC controller and GPIO controller inside the MCU through an external analog signal preprocessing circuit. The control MCU performs signal conditioning and strobe sampling on the analog signals from the XPIN double-row IDC bull-horn socket and the YPIN double-row IDC bull-horn socket through an external digital signal preprocessing circuit. The control MCU performs buffering and drive conversion on the digital input and output signals, performs logical interlocking processing on multiple groups of PWM switch signals, and connects them to the XPIN double-row IDC bull-horn socket and the YPIN double-row IDC bull-horn socket. The above power sockets, XPIN double-row IDC bull-horn sockets and YPIN double-row IDC bull-horn sockets are connected to the secondary circuits of the power conversion unit and the AC / DC input and output circuits in the inverter system, wherein the XPIN double-row IDC bull-horn socket and the YPIN double-row IDC bull-horn socket are both analog-digital mixed signal sockets. The XPIN double-row IDC bull-horn socket and the YPIN double-row IDC bull-horn socket have corresponding typical PIN numbers of 30, 34, 40, 50, 56, and 64, which can be flexibly selected according to the connection signal distribution between the inverter main control module and the power conversion unit and the AC / DC input and output circuits. The basic concepts have been described above. Obviously, for those skilled in the art, the above utility model disclosure is only used as an example and does not constitute a limitation of the present application. Although it is not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present application.

[0059] The data acquisition stick of the utility model supports multi-mode wireless data transmission, including wireless communication and mobile communication, and can realize both short-distance local data interaction and long-distance cloud data interaction. In addition, the data acquisition stick of the utility model uses USB communication protocol for data interaction with the inverter system, which enables the same wireless data acquisition stick to adapt to different inverter systems, such as photovoltaic inverters, energy storage inverters, photovoltaic-storage hybrid inverters, etc., so that one stick can be used for multiple purposes, one stick can be used for fast transmission, and one stick can be used universally, and it has good convenience, efficiency and versatility.

[0060] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0061] Some aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". The processor may be one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof. In addition, various aspects of the present application may be expressed as computer products located in one or more computer-readable media, which include computer-readable program codes. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, tapes ...), optical disks (e.g., compact disks CDs, digital versatile disks DVDs ...), smart cards, and flash memory devices (e.g., cards, sticks, key drives ...).

[0062] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0063] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0064] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0067] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more utility model embodiments, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0068] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0069] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A data acquisition stick, characterized in that: include: An external port, a serial port switching module, a transceiver level conversion module, a first communication module, a second communication module and a power supply module, the transceiver level conversion module includes a first conversion unit and a second conversion unit, the first conversion unit is connected to the first communication module, and the second conversion unit is connected to the second communication module, the serial port switching module includes a control end, a first communication channel and a second communication channel, the control end is connected to the control signal pin of the external port, and is used to control the first communication channel or the second communication channel to be turned on according to the received control signal, the first communication channel is connected to the first conversion unit, and the second communication channel is connected to the second conversion unit.

2. The data acquisition stick according to claim 1, characterized in that: The serial port switching module includes a serial port control unit and a multi-channel analog switch integrated unit, the serial port control unit includes the control end, a first enable signal sending end, and a second enable signal sending end, the multi-channel analog switch integrated unit includes a first enable signal receiving end, a second enable signal receiving end, a first communication channel, and a second communication channel, the first enable signal sending end is connected to the first enable signal receiving end, and the second enable signal sending end is connected to the second enable signal receiving end, when the control signal received by the control end is high level, the first enable signal is high level, the second enable signal is low level, and the first communication channel is turned on, when the control signal received by the control end is low level, the first enable signal is low level, the second enable signal is high level, and the second communication channel is turned on.

3. The data acquisition stick according to claim 2, characterized in that: The serial port control unit includes: a first switch tube, a second switch tube, a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor, a fourth voltage-dividing resistor, and a first pull-up resistor, wherein one end of the first voltage-dividing resistor receives the control signal, and the other end is connected to the base of the first switch tube, the collector of the first switch tube is connected to the first pull-up resistor and sends the second enable signal, the other end of the first pull-up resistor is connected to a first level, the emitter of the first switch tube is grounded, one end of the third voltage-dividing resistor is connected to the collector of the first switch tube, and the other end is connected to the base of the second switch tube, the emitter of the second switch tube is connected to the first level, the collector of the second switch tube is connected to the fourth voltage-dividing resistor and sends the first enable signal, the other end of the fourth voltage-dividing resistor is grounded, one end of the second voltage-dividing resistor is connected to the base of the first switch tube, and the other end is grounded.

4. The data acquisition stick according to claim 1, characterized in that: The external port includes a USB interface, a magnetic bead, a grounding resistor, a first impedance matching resistor and a second impedance matching resistor. The power pin of the USB interface is connected to the external power supply through the magnetic bead. Two USB2.0 differential pins of the USB interface receive two USB data differential signals through the first impedance matching resistor and the second impedance matching resistor. One of the ultra-high-speed differential receiving pins of the USB interface receives a serial port receiving signal, one of the ultra-high-speed differential sending pins of the USB interface receives a serial port sending signal, and the signal ground pin of the USB interface receives the control signal.

5. The data acquisition stick according to claim 4, characterized in that: The USB interface is a USB3.0 interface, a USB3.1 interface, a USB3.2 interface or a USB4 interface.

6. The data acquisition stick according to claim 1, characterized in that: The first communication module is a wireless communication module, and the second communication module is a mobile communication module.

7. The data acquisition stick according to claim 6, characterized in that: The first conversion unit is used to convert the level of the serial port transceiver signal of the first communication module so that it matches the level of the serial port transceiver signal of the first communication channel of the serial port switching module, and the second conversion unit is used to convert the level of the serial port transceiver signal of the second communication module so that it matches the level of the serial port transceiver signal of the second communication channel of the serial port switching module.

8. The data acquisition stick according to claim 7, characterized in that: The first conversion unit includes a first anti-phase conversion unit and a first in-phase conversion unit; The first inverting conversion unit includes a third switch tube, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor, and a second pull-up resistor, one end of the fifth voltage-dividing resistor receives a serial port receiving signal of the first communication channel, and the other end is connected to the base of the third switch tube, the collector of the third switch tube is connected to the second pull-up resistor and sends the serial port receiving signal of the first communication module, the emitter of the third switch tube is grounded, the other end of the second pull-up resistor is connected to the second level, one end of the sixth voltage-dividing resistor is connected to the fifth voltage-dividing resistor, and the other end is grounded; The first in-phase conversion unit includes a fourth switch tube, a third pull-up resistor and a fourth pull-up resistor, and a first filter capacitor. One end of the fourth pull-up resistor is connected to the second level, and the other end is connected to the base of the fourth switch tube. The first filter capacitor is connected in parallel with the fourth pull-up resistor. The emitter of the fourth switch tube receives the serial port sending signal of the first communication module, the collector of the fourth switch tube is connected to the third pull-up resistor and sends the serial port sending signal of the first communication channel, and the other end of the third pull-up resistor is connected to the first level, and the first level is higher than the second level.

9. The data acquisition stick according to claim 1, characterized in that: The second conversion unit includes a second anti-phase conversion unit and a second in-phase conversion unit. The second inverting conversion unit includes a fifth switch tube, a seventh voltage-dividing resistor, an eighth voltage-dividing resistor, and a fifth pull-up resistor, one end of the seventh voltage-dividing resistor receives the serial port receiving signal of the second communication channel, and the other end is connected to the base of the fifth switch tube, the collector of the fifth switch tube is connected to the fifth pull-up resistor and sends the serial port receiving signal of the second communication module, the emitter of the fifth switch tube is grounded, the other end of the fifth pull-up resistor is connected to the third level, one end of the eighth voltage-dividing resistor is connected to the seventh voltage-dividing resistor, and the other end is grounded; The second in-phase conversion unit includes a sixth switch tube, a sixth pull-up resistor, a seventh pull-up resistor, and a second filter capacitor. One end of the seventh pull-up resistor is connected to the third level, and the other end is connected to the base of the sixth switch tube. The second filter capacitor is connected in parallel with the seventh pull-up resistor. The emitter of the sixth switch tube receives the serial port sending signal of the second communication module, the collector of the sixth switch tube is connected to the sixth pull-up resistor and sends the serial port sending signal of the second communication channel, and the other end of the sixth pull-up resistor is connected to the first level, which is higher than the third level.

10. The data acquisition stick according to claim 1, characterized in that: It also includes a status indication unit, which is connected to the power module, the first communication module and the second communication module respectively.

11. An energy storage data acquisition system, characterized in that: include: Inverter system; The data acquisition stick according to any one of claims 1 to 10, used for collecting data in the inverter system; The first connector is used to connect the data acquisition stick with the inverter system.

12. The energy storage data acquisition system according to claim 11, characterized in that: Also includes: An energy storage system, comprising a first wireless communication module; A BMS connector, used to connect the inverter system with the energy storage system; The first communication module of the data acquisition stick is communicatively connected to the first wireless communication module of the energy storage system, and the data acquisition stick is also used to collect battery data from the energy storage system.

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