Photovoltaic and power management integrated control board and system

Abstract

This application provides an integrated photovoltaic and power management control board and system, including an MPPT control module, a charging module, a discharging module, a power monitoring and alarm module, and a display module. The power monitoring and alarm module can not only calculate the battery power, but also calculate the photovoltaic input power during the operation of the MPPT control module, the charging power during the operation of the charging module, and the discharging power during the operation of the discharging module. By reusing the power monitoring and alarm module, the management of the battery, the MPPT control module, the charging module, and the discharging module can be realized. Only one chip is needed, which has high integration, small footprint, and low cost.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic energy storage technology, and in particular to an integrated control board and system for photovoltaic and power management. Background Technology

[0002] Currently, in existing photovoltaic energy storage circuits, the photovoltaic controller, energy storage battery, and BMS control board are independent and connected by wires. Each photovoltaic controller and BMS board has its own corresponding MCU chip, metering module, and control board, resulting in numerous connecting wires, low integration, and the independent operation of the photovoltaic controller and BMS control board, leading to a large space occupation and high cost. Summary of the Invention

[0003] This invention provides an integrated photovoltaic and power management control board and system to solve the problems of existing technologies where photovoltaic controllers and BMS control boards are independent, resulting in numerous connection lines, large space occupation, and high costs.

[0004] The first aspect of this application provides an integrated photovoltaic and power management control board, comprising:

[0005] The MPPT control module is used to track the photovoltaic input voltage;

[0006] A charging module, which connects the MPPT control module and the battery, is used to control the charging process of the battery;

[0007] A discharge module, which is connected to the battery, is used to control the battery's discharge process;

[0008] A power monitoring and alarm module is connected to the battery, the MPPT control module, the charging module, and the discharging module. It is used to calculate the power of the battery, the photovoltaic input power during the operation of the MPPT control module, the charging power during the operation of the charging module, and the discharging power during the operation of the discharging module.

[0009] The display module is connected to the power monitoring and alarm module and is used to display the calculation results of the power monitoring and alarm module.

[0010] The second aspect of this application provides an integrated photovoltaic and power management control system, including the integrated photovoltaic and power management control board, battery, and photovoltaic panel described in the first aspect;

[0011] The integrated photovoltaic and power management control board is connected to the battery and the photovoltaic panel respectively.

[0012] This application provides an integrated photovoltaic and power management control board and system, including an MPPT control module, a charging module, a discharging module, a power monitoring and alarm module, and a display module. The power monitoring and alarm module can not only calculate the battery power, but also calculate the photovoltaic input power during the operation of the MPPT control module, the charging power during the operation of the charging module, and the discharging power during the operation of the discharging module. By reusing the power monitoring and alarm module, the management of the battery, the MPPT control module, the charging module, and the discharging module can be realized. Only one chip is needed, which has high integration, small footprint, and low cost. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of an integrated photovoltaic and power management control board provided in Embodiment 1 of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of an integrated photovoltaic and power management control board provided in Embodiment 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of an integrated photovoltaic and power management control board provided in Embodiment 2 of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This application provides an integrated photovoltaic and power management control board that combines a photovoltaic control board and a battery BMS board into one. It uses a single MCU chip and reuses the metering module in the MCU chip to realize both photovoltaic control output function and battery management function.

[0019] In one embodiment, such as Figure 1 As shown, a photovoltaic and power management integrated control board 1 is provided, comprising:

[0020] MPPT control module 6 is used to track the photovoltaic input voltage;

[0021] The charging module 7 is connected to the MPPT control module 6 and the battery 10 and is used to control the charging process of the battery 10.

[0022] The discharge module 11 is connected to the battery 10 and is used to control the discharge process of the battery 10.

[0023] The power monitoring and alarm module 20 is connected to the battery 10, the MPPT control module 6, the charging module 7 and the discharging module 11. It is used to calculate the power of the battery 10, the photovoltaic input power during the operation of the MPPT control module 6, the charging power during the operation of the charging module 7 and the discharging power during the operation of the discharging module 11.

[0024] The display module 30 is connected to the power monitoring and alarm module 20 and is used to display information according to the instructions of the power monitoring and alarm module 20.

[0025] The MPPT (Maximum Power Point Tracking) control module can detect the output voltage of the photovoltaic panel in real time and track the highest voltage and current values ​​to charge the battery 10 at maximum power output. The power monitoring and alarm module 20 is connected to the MPPT control module 6. During the operation of the MPPT control module 6, the power monitoring and alarm module 20 monitors the current and voltage of the MPPT control module 6, and calculates the power level of the MPPT control module 6. When the power level of the MPPT control module 6 exceeds the preset power level, an alarm is triggered via the display module 30.

[0026] Among them, the charging module 7 is the charging control circuit of the battery 10, which is used to realize reliable management of the photovoltaic panel charging the battery 10. The power monitoring and alarm module 20 is connected to the charging module 7. During the operation of the charging module 7, the power monitoring and alarm module 20 monitors the current and voltage of the charging module 7, and then calculates the power of the charging module 7. When the power of the charging module 7 exceeds the preset power, an alarm is triggered through the display module 30.

[0027] Among them, the discharge module 11 is the discharge control circuit of the battery 10, which is used to realize the reliable management of the discharge of the photovoltaic panel to the battery 10. The power monitoring and alarm module 20 is connected to the discharge module 11. During the operation of the discharge module 11, the power monitoring and alarm module 20 monitors the current and voltage of the discharge module 11, and then calculates the power of the discharge module 11. When the power of the discharge module 11 exceeds the preset power, an alarm is triggered through the display module 30.

[0028] The power monitoring and alarm module 20 monitors the power level and temperature of battery 10. When the power level or temperature of battery 10 exceeds a preset value, adjustments are made to battery 10. Simultaneously, during photovoltaic charging and discharging of battery 10, the power monitoring and alarm module 20 calculates the photovoltaic input power during the operation of MPPT control module 6, the charging power during the operation of charging module 7, and the discharging power during the operation of discharging module 11. When the power monitoring and alarm module 20 detects an abnormal battery temperature, it controls MPPT control module 6 and charging module 7 to stop operating when charging, or controls discharging module 11 to stop operating when discharging. When the photovoltaic and power management integrated control board 1 charges the photovoltaic panel and discharges the external electrical equipment through the discharge module, if the remaining battery charge is detected to be greater than a set value, it checks whether the battery discharge current is greater than the charging current. If the detection result is yes, the battery heating device is not activated; if the detection result is no, the battery heating device is activated to ensure that the battery temperature is greater than or equal to the minimum temperature suitable for the battery; if the remaining battery charge is detected to be less than or equal to the set value, the battery heating operation is activated. This embodiment can realize the normal charging and discharging process of the battery without continuously heating the battery.

[0029] The display module 30 includes various indicator lights, which are displayed according to the instructions of the power monitoring and alarm module 20.

[0030] This embodiment provides an integrated photovoltaic and power management control board, including an MPPT control module, a charging module, a discharging module, a power monitoring and alarm module, and a display module. The power monitoring and alarm module can not only calculate the battery's power, but also calculate the photovoltaic input power during the operation of the MPPT control module, the charging power during the operation of the charging module, and the discharging power during the operation of the discharging module. By reusing the power monitoring and alarm module, the management of the battery, the MPPT control module, the charging module, and the discharging module can be realized. Only one chip is needed, which has high integration, small footprint, and low cost.

[0031] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0032] The reverse connection protection module 5 is connected between the MPPT control module 6 and the photovoltaic input terminal, and is used to keep the photovoltaic input terminal in a cut-off state when the positive and negative terminals are reversed.

[0033] The reverse connection protection module 5 is designed to provide power to the MPPT control module 6 when the positive and negative terminals of the photovoltaic input are correctly connected, and to cut off power to the MPPT control module 6 when the positive and negative terminals of the photovoltaic input are reversed. The technical effect of the reverse connection protection module 5 is to prevent damage to the control board due to incorrect wiring of the photovoltaic panel.

[0034] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0035] The first anti-reverse charging module 8 is connected between the charging module 7 and the input terminal of the battery 10, and is used to be in the cut-off state when the input terminal of the battery 10 outputs current.

[0036] In this module, the first anti-reverse charging module 8 is in a cut-off state when outputting current at the input terminal of battery 10. The technical effect of setting up the first anti-reverse charging module 8 is to avoid damage to the control board due to incorrect wiring of the battery module.

[0037] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0038] The second anti-reverse charging module 12 is connected between the MPPT control module 6 and the discharge module 11, and is used to be in the cut-off state when the discharge module 11 outputs current.

[0039] The second anti-reverse charging module 12 is used to be in a cut-off state when the discharge module 11 outputs current. The technical effect of setting the second anti-reverse charging module 12 is to cut off the reverse charging of the solar panel by the battery 10 during discharge.

[0040] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0041] Heating control module 19 is connected to power monitoring and alarm module 20 and battery film on battery 10;

[0042] When the power monitoring and alarm module 20 detects that the temperature is lower than the preset temperature value, it sends a heating control command to the heating control module 19.

[0043] The heating control module 19 controls the battery membrane to heat the battery 10 according to the control command.

[0044] Among them, the heating control module 19 is a control relay that cuts off the output of control power according to the sampled temperature set value of the power monitoring and alarm module 20, thereby controlling the start and stop of the battery heating film.

[0045] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0046] The power module 21 is connected to the output terminal of the discharge module 11, the voltage input terminal of the heating control module 19, and the voltage input terminal of the power monitoring and alarm module 20. It is used to convert the current output by the discharge module 11 to power the heating control module 19 and the power monitoring and alarm module 20.

[0047] Among them, the power module 21 is a power circuit used to convert the output power to meet the power type requirements of the power monitoring and alarm module 20 and the heating film control module 19.

[0048] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0049] The output current limiting module 13 is connected to the output terminal of the discharge module 11 and is used to limit the current output by the discharge module 11.

[0050] Among them, the output current limiting module 13 is a self-resetting fuse for PCB boards, used for short circuit, overcurrent protection and current limiting output, and has a self-resetting function during use, reducing maintenance issues.

[0051] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0052] The input current limiting module 4 has its output terminal connected to the first input terminal of the reverse connection protection module 5, and is used to limit the input current.

[0053] Among them, the input current limiting module 4 is a self-resetting fuse for PCB boards, used for short circuit, overcurrent and other protection, and has a self-resetting function during use, reducing maintenance problems caused by faults.

[0054] Furthermore, such as Figure 2 As shown, the photovoltaic and power management integrated control board 1 also includes:

[0055] Surge protector 3 is connected to the input terminal of input current limiting module 4 and the second input terminal of reverse connection protection module 5.

[0056] Among them, surge protector 3 is used to protect the control board from lightning strikes.

[0057] Furthermore, such as Figure 2 As shown, the display module 30 includes a red alarm indicator 16, a yellow charging indicator 17, and a green running indicator 18. The power monitoring and alarm module 20 is connected to the red alarm indicator 16, the yellow charging indicator 17, and the green running indicator 18.

[0058] Among them, the red alarm indicator 16 is used to issue an alarm when the battery temperature or power is abnormal or when an abnormality occurs during photovoltaic charging; the yellow charging indicator 17 is used when the photovoltaic panel is charging the battery; and the green operation indicator 18 is used when the battery is discharging.

[0059] Embodiment 2 of this application provides an integrated photovoltaic and power management control system, such as Figure 3 As shown, it includes the photovoltaic and power management integrated control board 1, battery 10 and photovoltaic panel 35 of Embodiment 1;

[0060] The photovoltaic and power management integrated control board 1 is connected to the battery 10 and the photovoltaic panel 35 respectively.

[0061] The external casing of the photovoltaic and power management integrated control board 1 is typically made of die-cast aluminum or sheet metal. The battery 10 is composed of several cells with the same voltage and current rating; for example, it could be a 24V 60AH battery pack composed of eight 3.2V 60AH cells. A heating film is provided on the outside of the battery to heat the battery pack at temperatures below zero, enabling low-temperature charging and discharging. Aviation socket 31 is the photovoltaic input positive socket, connected to the photovoltaic panel's output positive line. Aviation socket 32 ​​is the photovoltaic input negative socket, connected to the photovoltaic panel's output negative line. Aviation socket 33 is the power output socket, connected to the positive and negative lines of output terminal 14. Aviation socket 34 is the communication output socket, connected to the 16-5 RS485 communication output line.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A photovoltaic and power management integrated control board, characterized in that, include: The MPPT control module is used to track the photovoltaic input voltage; A charging module, which connects the MPPT control module and the battery, is used to control the charging process of the battery; A discharge module, which is connected to the battery, is used to control the battery's discharge process; The power monitoring and alarm module is connected to the battery, the MPPT control module, the charging module, and the discharging module. It is used to calculate the battery's power, the photovoltaic input power during the operation of the MPPT control module, the charging power during the operation of the charging module, and the discharging power during the operation of the discharging module. The power monitoring and alarm module is also used to detect whether the battery's discharge current is greater than the charging current if the remaining power of the battery is detected to be greater than a set value when the battery is charging and discharging at the same time. If the detection result is positive, the heating operation of the battery heating device will not be activated. If the test result is negative, the battery heating device will be activated to raise the battery temperature to a level greater than or equal to the minimum temperature suitable for the battery; if the remaining battery charge is detected to be less than or equal to the set value, the battery heating device will be activated. The display module is connected to the power monitoring and alarm module and is used to display information according to the instructions of the power monitoring and alarm module. A heating control module is connected to the power monitoring and alarm module and the battery film on the battery; when the power monitoring and alarm module detects that the temperature is lower than a preset temperature value, it sends a heating control command to the heating control module; the heating control module controls the battery film to heat the battery according to the control command.

2. The photovoltaic and power management integrated control board as described in claim 1, characterized in that, The integrated photovoltaic and power management control board also includes: The reverse connection protection module is connected between the MPPT control module and the photovoltaic input terminal, and is used to keep the photovoltaic input terminal in a cut-off state when the positive and negative terminals are reversed.

3. The photovoltaic and power management integrated control board as described in claim 1, characterized in that, The integrated photovoltaic and power management control board also includes: The first anti-reverse charging module is connected between the charging module and the battery input terminal, and is used to be in a cut-off state when the battery input terminal outputs current. The second anti-reverse charging module is connected between the MPPT control module and the discharge module, and is used to keep the discharge module in a cut-off state when it outputs current.

4. The photovoltaic and power management integrated control board as described in claim 1, characterized in that, The integrated photovoltaic and power management control board also includes: A power supply module, which is connected to the output terminal of the discharge module, the voltage input terminal of the heating control module, and the voltage input terminal of the power monitoring and alarm module, is used to convert the current output by the discharge module to power the heating control module and the power monitoring and alarm module.

5. The photovoltaic and power management integrated control board as described in claim 1, characterized in that, The integrated photovoltaic and power management control board also includes: An output current limiting module is connected to the output terminal of the discharge module and is used to limit the current output by the discharge module.

6. The photovoltaic and power management integrated control board as described in claim 2, characterized in that, The integrated photovoltaic and power management control board also includes: The input current limiting module has its output terminal connected to the first input terminal of the reverse connection protection module, and is used to limit the input current.

7. The photovoltaic and power management integrated control board as described in claim 6, characterized in that, The integrated photovoltaic and power management control board also includes: A surge protector, which connects the input terminal of the input current limiting module and the second input terminal of the reverse connection protection module.

8. The photovoltaic and power management integrated control board as described in claim 1, characterized in that, The display module includes a red alarm indicator, a yellow charging indicator, and a green operating indicator. The power monitoring and alarm module is connected to the red alarm indicator, the yellow charging indicator, and the green operating indicator.

9. An integrated photovoltaic and power management control system, characterized in that, Includes the photovoltaic and power management integrated control board, battery, and photovoltaic panel as described in any one of claims 1 to 8; The integrated photovoltaic and power management control board is connected to the battery and the photovoltaic panel respectively.

Images