Motor home energy storage control method and system based on wireless current sensor

Abstract

The invention discloses a motor home energy storage control method and system based on a wireless current sensor, and the method comprises the steps: an EMC management system reads a current value of a commercial power end through the current sensor, calculates a commercial power voltage effective value, and controls an inverter to operate in a grid-connected manner when the current sensor does not read the current value or the voltage effective value is smaller than a set limit value; the EMC management system controls the inverter to increase the output power; the EMC management system detects the input power of the photovoltaic module, controls the inverter to adjust the output power, and stops adjusting the output power of the inverter when the current value read by the current sensor is not reduced to the set limit value and the input power of the photovoltaic module reaches the maximum value; meanwhile, the EMC management system detects the SOC value of the battery and controls the inverter to adjust the output power, and when the current value read by the current sensor is not reduced to the set limit value and the output power of the inverter reaches the maximum value, adjustment of the output power of the inverter is stopped. The utilization rate of life batteries and solar photovoltaics of the motor home can be improved.

Description

Technical Field

[0001] The present invention relates to a motorhome energy storage management system, and in particular to a motorhome energy storage control method and system based on a wireless current sensor. Background Art

[0002] In the prior art, whether it is an integrated RV or a trailer RV, the traditional RV battery energy storage system generally only provides living electricity after the RV goes out, thereby solving the living electricity demand when going out. In order to separate from the driving battery, the existing RVs are generally equipped with living batteries. Among them, there are generally three sources of living electricity for RVs: one is the power generation of solar panels installed on the top of the RV; the second is from the car generator of the RV; the third is to use the city electricity to charge the RV's living battery when staying in the camp. The above three methods can store the required electricity in the living battery, and then use the built-in off-grid inverter to invert the battery DC into AC power to supply various electrical power in the RV, or directly supply low-voltage DC power.

[0003] At present, with more and more electrical equipment in RVs and more and more complex circuits, more and more electricity is required. Therefore, the battery capacity requirements installed in RVs are gradually increasing. With the large-scale application of RV lithium batteries, it has brought many effects such as smaller size and higher energy density. At the same time, the laying of high-power solar panels has also significantly solved the long-term power demand. However, how to improve the utilization rate of RV life batteries and solar photovoltaics is still a technical problem that needs to be urgently solved by existing technologies. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an RV energy storage control method and system based on a wireless current sensor with a current value wireless detection function, which can effectively improve the utilization rate of RV life batteries and solar photovoltaics, facilitate connection to household power circuits, and have a current value wireless detection function, in view of the shortcomings of the existing technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0006] A method for controlling energy storage of a motorhome based on a wireless current sensor, the method is implemented based on a system, the system includes a photovoltaic module, an EMC management system, an inverter, a battery and a current sensor, the method includes the following steps: step S1, the EMC management system reads the current value of the mains terminal and calculates the effective value of the mains voltage through the current sensor, and when the current sensor does not read the current value or the effective value of the voltage is less than the set limit, controls the inverter to connect to the grid; step S2, the EMC management system controls the inverter to increase the output power; step S3, when the EMC management system detects that the current When the current value read by the sensor decreases, step S4 is executed; in step S4, the EMC management system detects the input power of the photovoltaic component, controls the inverter to adjust the output power, and stops adjusting the output power of the inverter when the current value read by the current sensor has not decreased to the set limit and the input power of the photovoltaic component has reached the maximum value; at the same time, the EMC management system detects the SOC value of the battery, controls the inverter to adjust the output power, and stops adjusting the output power of the inverter when the current value read by the current sensor has not decreased to the set limit and the output power of the inverter has reached the maximum value.

[0007] Preferably, in step S3, if the current value read by the current sensor does not decrease, the EMC management system controls the inverter to reduce output power until the EMC management system detects that the current value read by the current sensor decreases to a preset value, and then executes step S4.

[0008] Preferably, the current sensor is a snap-on wireless current sensor.

[0009] Preferably, the current value read by the current sensor is transmitted to the EMC management system via RF433 protocol.

[0010] A RV energy storage control system based on wireless current sensors, the system comprising photovoltaic components, an EMC management system, an inverter, a battery and a current sensor, and the system is used to execute the above-mentioned method.

[0011] Preferably, it comprises an MPPT controller, the input end of the MPPT controller is connected to the photovoltaic assembly, the output end of the MPPT controller is connected to the battery, and the control end of the MPPT controller is connected to the EMC management system.

[0012] Preferably, the power detection terminal of the EMC management system is connected to the battery.

[0013] Preferably, the DC side of the inverter is connected to the battery and the RV DC load, and the AC side of the inverter is connected to the RV AC load.

[0014] Preferably, the AC side of the inverter is also connected to a household load.

[0015] Preferably, the current sensor is a snap-on wireless current sensor, and the current value read by the current sensor is transmitted to the EMC management system via the RF433 protocol.

[0016] In the RV energy storage control method based on wireless current sensor disclosed in the present invention, the input end of the MPPT controller is connected to the photovoltaic module, the output end of the MPPT controller is connected to the battery, the control end of the MPPT controller is connected to the EMC management system, the power detection end of the EMC management system is connected to the battery, the DC side of the inverter is connected to the battery and the RV DC load, and the AC side of the inverter is connected to the RV AC load and the household load. In practical applications, when the RV returns to the user's residence, the solar panel installed on the top of the RV can be directly connected to the grid for use in the household power circuit, without the need to add additional off-grid switching equipment, and without the need to transform the home power supply and circuit system, directly using solar energy to increase the power generation power, thereby reducing household power consumption. Compared with the prior art, the present invention can not only effectively improve the utilization rate of RV life batteries and solar photovoltaics, but also facilitate the connection of household power circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a block diagram of the RV energy storage control system based on the wireless current sensor;

[0018] Figure 2 It is a schematic diagram of an application scenario of a motorhome energy storage control system based on a wireless current sensor of the present invention;

[0019] Figure 3 This is a partial process of the RV energy storage control method based on wireless current sensor of the present invention Figure 1 ;

[0020] Figure 4 This is a partial process of the RV energy storage control method based on wireless current sensor of the present invention Figure 2 . DETAILED DESCRIPTION

[0021] The present invention is described in more detail below with reference to the accompanying drawings and embodiments.

[0022] The present invention discloses a method for controlling RV energy storage based on a wireless current sensor. Figures 1 to 4 As shown, the method is implemented based on a system, the system includes a photovoltaic module 1, an EMC management system 2, an inverter 3, a battery 4, a current sensor 5 and an MPPT controller 6, and the method includes the following steps:

[0023] Step S1, the EMC management system 2 reads the mains current value and calculates the mains voltage effective value through the current sensor 5, and when the current sensor 5 does not read the current value or the voltage effective value is less than the set limit, controls the inverter 3 to connect to the grid;

[0024] Step S2, the EMC management system 2 controls the inverter 3 to increase output power;

[0025] Step S3, when the EMC management system 2 detects that the current value read by the current sensor 5 decreases, executing step S4;

[0026] Step S4, the EMC management system 2 detects the input power of the photovoltaic component 1, controls the inverter 3 to adjust the output power, and stops adjusting the output power of the inverter 3 when the current value read by the current sensor 5 has not decreased to the set limit and the input power of the photovoltaic component 1 has reached the maximum value; at the same time, the EMC management system 2 detects the SOC value of the battery 4, controls the inverter 3 to adjust the output power, and stops adjusting the output power of the inverter 3 when the current value read by the current sensor 5 has not decreased to the set limit and the output power of the inverter 3 has reached the maximum value.

[0027] In the above method, the input end of the MPPT controller 6 is connected to the photovoltaic component 1, the output end of the MPPT controller 6 is connected to the battery 4, the control end of the MPPT controller 6 is connected to the EMC management system 2, the power detection end of the EMC management system 2 is connected to the battery 4, the DC side of the inverter 3 is connected to the battery 4 and the RV DC load 7, and the AC side of the inverter 3 is connected to the RV AC load 8 and the household load 9.

[0028] In practical applications, when the RV returns to the user's residence, the solar panel installed on the top of the RV can be directly connected to the grid for use in the household power circuit, without the need to add additional off-grid switching equipment, and without the need to modify the home power supply and circuit system, directly using solar energy to increase the power generation power, thereby reducing household power consumption; at the same time, using the RV battery as an energy storage system, when the electricity price is low at night, the RV battery can be charged, and when the household power consumption peaks during the day, the household load can be discharged, thereby achieving the purpose of energy saving and reducing losses; further, the present invention can cooperate with the photovoltaic system that has been installed on the roof of the family, comprehensively dispatch energy, and further achieve the effect of energy saving and optimizing power distribution; in addition, by connecting the RV power supply system with the household power supply system, the mains input end of the RV can be directly plugged into the socket of the household AC power supply, and the whole system can be operated normally through the simple setting of the touch screen or the preset APP. Compared with the prior art, the present invention can not only effectively improve the utilization rate of RV life batteries and solar photovoltaics, but also facilitate the connection of household power circuits.

[0029] Furthermore, in step S3 of the present embodiment, if the current value read by the current sensor 5 does not decrease, the EMC management system 2 controls the inverter 3 to reduce the output power until the EMC management system 2 detects that the current value read by the current sensor 5 decreases to a preset value, and then executes step S4.

[0030] The current sensor 5 in this embodiment preferably has a current value wireless detection function, specifically, the current sensor 5 is a snap-on wireless current sensor. Further, the current value read by the current sensor 5 is transmitted to the EMC management system 2 via the RF433 protocol.

[0031] For the circuit system of the present invention, see Figure 1 The present invention also proposes a RV energy storage control system based on a wireless current sensor, the system comprising a photovoltaic component 1, an EMC management system 2, an inverter 3, a battery 4 and a current sensor 5, and the system is used to execute the method described above.

[0032] Furthermore, this embodiment includes an MPPT controller 6 , an input end of the MPPT controller 6 is connected to the photovoltaic assembly 1 , an output end of the MPPT controller 6 is connected to the battery 4 , and a control end of the MPPT controller 6 is connected to the EMC management system 2 .

[0033] For the connection method of the circuit system of the present invention, please refer to Figure 1The power detection end of the EMC management system 2 is connected to the battery 4. The DC side of the inverter 3 is connected to the battery 4 and the RV DC load 7, and the AC side of the inverter 3 is connected to the RV AC load 8. The AC side of the inverter 3 is also connected to a household load 9.

[0034] The RV energy storage control system based on the above-mentioned architecture enables the present invention to utilize the solar panels installed on the roof of the RV to generate electricity directly connected to the grid for family use. There is no need to add additional off-grid switching equipment, and there is no need to modify the home power supply and circuit system. The use of solar power generation power to increase the power generation power can effectively reduce household electricity consumption. At the same time, the control system of the present invention can cooperate with the rooftop photovoltaic system that has been installed in the home to comprehensively dispatch energy, save energy and reduce emissions. In practical applications, rooftop solar power generation is preferentially used for family use.

[0035] As a preferred embodiment, the current sensor 5 is a snap-on wireless current sensor, and the current value read by the current sensor 5 is transmitted to the EMC management system 2 via the RF433 protocol. The current sensor used in the present invention adopts a snap-on passive composite wireless current transformer, which has a simple installation process and can be directly snapped on the user's AC household input terminal, which simplifies the installation steps and saves installation costs.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A RV energy storage control method based on wireless current sensor, characterized in that: The method is implemented based on a system, the system comprising a photovoltaic component (1), an EMC management system (2), an inverter (3), a battery (4) and a current sensor (5), and the method comprises the following steps: Step S1, the EMC management system (2) reads the mains current value and calculates the mains voltage effective value through the current sensor (5), and when the current sensor (5) does not read the current value or the voltage effective value is less than a set limit value, controls the inverter (3) to connect to the grid for operation; Step S2, the EMC management system (2) controls the inverter (3) to increase output power; Step S3, when the EMC management system (2) detects that the current value read by the current sensor (5) decreases, executing step S4; Step S4, the EMC management system (2) detects the input power of the photovoltaic assembly (1), controls the inverter (3) to adjust the output power, and stops adjusting the output power of the inverter (3) when the current value read by the current sensor (5) has not decreased to the set limit value and the input power of the photovoltaic assembly (1) has reached a maximum value; at the same time, the EMC management system (2) detects the SOC value of the battery (4), controls the inverter (3) to adjust the output power, and stops adjusting the output power of the inverter (3) when the current value read by the current sensor (5) has not decreased to the set limit value and the output power of the inverter (3) has reached a maximum value.

2. The RV energy storage control method based on wireless current sensor according to claim 1, characterized in that: In step S3, if the current value read by the current sensor (5) does not decrease, the EMC management system (2) controls the inverter (3) to reduce the output power until the EMC management system (2) detects that the current value read by the current sensor (5) decreases to a preset value, and then executes step S4.

3. The RV energy storage control method based on wireless current sensor according to claim 1, characterized in that: The current sensor (5) is a snap-on wireless current sensor.

4. The RV energy storage control method based on wireless current sensor as claimed in claim 3 is characterized in that: The current value read by the current sensor (5) is transmitted to the EMC management system (2) via the RF433 protocol.

5. A RV energy storage control system based on wireless current sensor, characterized in that: The system comprises a photovoltaic component (1), an EMC management system (2), an inverter (3), a battery (4) and a current sensor (5), and the system is used to execute the method according to any one of claims 1 to 4.

6. The RV energy storage control system based on wireless current sensor as claimed in claim 5, characterized in that: It comprises an MPPT controller (6), wherein the input end of the MPPT controller (6) is connected to the photovoltaic assembly (1), the output end of the MPPT controller (6) is connected to the battery (4), and the control end of the MPPT controller (6) is connected to the EMC management system (2).

7. The RV energy storage control system based on wireless current sensor as claimed in claim 5, characterized in that: The power detection terminal of the EMC management system (2) is connected to the battery (4).

8. The RV energy storage control system based on wireless current sensor as claimed in claim 5, characterized in that: The DC side of the inverter (3) is connected to the battery (4) and the RV DC load (7), and the AC side of the inverter (3) is connected to the RV AC load (8).

9. The RV energy storage control system based on wireless current sensor as claimed in claim 8, characterized in that: The AC side of the inverter (3) is also connected to a household load (9).

10. The RV energy storage control system based on wireless current sensor as claimed in claim 5, characterized in that: The current sensor (5) is a snap-on wireless current sensor, and the current value read by the current sensor (5) is transmitted to the EMC management system (2) via the RF433 protocol.

Images