Vehicle-mounted photovoltaic charging system

Abstract

The invention discloses a vehicle-mounted photovoltaic charging system, and relates to the technical field of new energy automobile charging, the vehicle-mounted photovoltaic charging system comprises a photovoltaic power generation panel, the photovoltaic power generation panel is connected with a photovoltaic power generation controller through a wire, the photovoltaic power generation controller is connected with a storage battery through a wire, and the wire connecting the photovoltaic power generation controller and the storage battery is connected with an inversion and charging all-in-one machine. The inversion and charging all-in-one machine is connected with a vehicle charging circuit and further connected with a signal detector. Compared with the prior art, the system has the advantages that solar energy is used for charging, dependence on traditional fossil energy is reduced, carbon emission of the vehicle is reduced, remarkable environmental protection benefits are achieved, the energy self-sufficiency rate of the vehicle is increased, intelligent control over the charging process and electric energy conversion is achieved, and the system is worthy of popularization and application. The safety and reliability of the system are improved, the structure is compact, the system can be conveniently installed and used on a vehicle, and the practicability of the system is improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle charging technology, and specifically to a vehicle-mounted photovoltaic charging system that integrates photovoltaic power generation, electric energy storage, inverter charging and intelligent control functions, aiming to improve the energy self-sufficiency and charging convenience of new energy vehicles. Background Art

[0002] With the rapid development of the new energy vehicle industry, the demand for efficient and environmentally friendly charging solutions is growing. Traditional charging methods rely on power supply from the power grid, which has problems such as a single energy source and limited layout of charging facilities. Therefore, developing an on-board system that can use solar energy for charging is of great significance for improving the endurance of new energy vehicles and reducing dependence on the power grid.

[0003] The patent with publication number CN109103977A discloses an electric vehicle onboard photovoltaic charging system, which can better convert sunlight into electricity to power electric vehicles, can realize charging electric vehicles anytime and anywhere, realize the on-site utilization of photovoltaic power generation, and is not restricted by the location of charging piles, solving the problem of electric vehicle charging difficulties. However, similar detailed parameters are not clearly mentioned, and more debugging and adaptation work may be required in actual applications, which increases the difficulty of system design and implementation, and may also affect the performance and stability of the system. It is impossible to determine whether it has the same perfect control and protection mechanism. If there is a lack of similar effective control and protection measures, the system may face higher risks during operation, such as electrical failures may cause equipment damage or even safety accidents.

[0004] Another example is the patent with publication number CN206559125U, which discloses a vehicle-mounted photovoltaic charging system that can both boost and buck voltage, making its input voltage range very wide; and improving conversion efficiency; it is suitable for new energy vehicles of various voltage levels. In addition, it has good compatibility with the output voltage range of solar panels; at the same time, it also has the advantages of simple system structure and flexibility. Its system integration may be relatively low, and the connection and collaborative working mode between the various parts are not clear and tight, which may cause the installation of the entire system on the vehicle to be more complicated, occupying a large space, which is not conducive to the space optimization of the vehicle. The detailed parameters of each key component are not clearly given, and there may be a certain efficiency loss in the process of energy conversion and utilization, which cannot give full play to the advantages of solar energy, resulting in energy waste and increased vehicle use costs. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a vehicle-mounted photovoltaic charging system, which can not only use solar energy for charging, but also has an intelligent control function to ensure the safety and efficiency of the charging process.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a vehicle-mounted photovoltaic charging system, comprising a photovoltaic power generation panel (1), characterized in that: the photovoltaic power generation panel (1) is connected to a photovoltaic power generation controller (2) through a wire, the photovoltaic power generation controller (2) is connected to a battery (3) through a wire, the wire connecting the photovoltaic power generation controller (2) and the battery (3) is connected to an inverter charging machine (4), the inverter charging machine (4) is connected to a vehicle charging line (5), the inverter charging machine (4) is also connected to a signal detector (6), the battery (3) is connected to a voltage detection switch module (7), and the voltage detection switch module (7) is connected to the inverter charging machine (4) through an inverter switch (8).

[0007] As an improvement, the photovoltaic panel (1) input is DC37V, and this specific voltage specification is designed and optimized. Under common lighting conditions, this voltage enables the photovoltaic panel to effectively convert solar energy into electrical energy, ensuring that stable and sufficient electrical energy can be generated in most environments to supply the subsequent charging system.

[0008] As an improvement, the photovoltaic power generation controller (2) outputs DC24V, which is one of the common charging voltage specifications for vehicle batteries. It can charge the battery safely and efficiently, avoid overcharging or undercharging, and extend the service life of the battery.

[0009] As an improvement, the inverter charger has a DC24V input and an AC220V output. The 24V input voltage can make full use of the electric energy stored in the battery, while ensuring the safe operation of the system, providing sufficient DC power for subsequent inverter operations.

[0010] As an improvement, the negative electrode of the battery (3) is connected to four relays through a signal detection switch, and the signal detection switch is connected to the vehicle ACC power relay K1. The relays are provided with pins 85, 86, 87, 87a and 30, and the pin 85 is connected to the positive electrode of the battery (3). The pins 86 of each relay are connected together and connected to the other output end of the signal detection switch through a wire. The pin 87 of the relay K2 is connected to the inverter charging machine (4), and the pin 87a of the relay K3 is connected to the output end of the charging machine. The pins 87 of the relays K3 and K4 are respectively connected to the AC220V input neutral line and the AC220V input live line of the charging pile. The pins 87a of the relays K3 and K4 are connected to the AC220V input neutral line and the AC220V input live line of the charging pile. The pins are respectively connected to the AC220V output neutral line and AC220V output live line of the charger, and the 30 pins of relays K3 and K4 are respectively connected to the AC220V input neutral line and AC220V input live line of the vehicle charger. The function of the signal detection switch (6) is that when it is detected that a home or commercial charging pile is used to charge the vehicle, the signal switch connects the K3 and K4 relay coils, so that the relay normally open contacts are closed to connect the charging pile and the vehicle charger circuit, and the vehicle power battery starts to charge. When the inverter is needed to charge, the detection switch disconnects the K3 and K4 relay coils, so that the relay normally open contacts disconnect the charging pile circuit, and the normally closed contacts connect the charging pile and the vehicle charger circuit to start charging.

[0011] As an improvement, the inverter charger (4) is connected to the photovoltaic panel (1), the battery (3), the signal detector (6) and the AC220V output. This multi-connection design reflects the high integration of the system. All key components are connected to the inverter charger, making the transmission and conversion of electric energy in the system more efficient and smooth.

[0012] As an improvement, the photovoltaic power generation panel (1) is connected to the photovoltaic power generation controller (2) through a line, the photovoltaic power generation controller (2) is connected to the battery (3), the battery (3) is connected to the K1 relay through a wire, the K1 relay is connected to the K2, K3, and K4 relays through an inverter, the K2, K3, and K4 relays are connected in series to the inverter, the inverter is connected to the K5 relay, and the K5 relay is connected to the vehicle ACC power supply. The connection relationship between the various components ensures that the entire system can work in coordination. For example, the electric energy generated by the photovoltaic power generation panel can pass through the controller, battery, relay, inverter and other components in sequence to achieve efficient conversion from solar energy to electric energy available to the vehicle.

[0013] As an improvement, the inverter is connected to the CC plug detection terminal through the K4 relay. This connection method adds a plug detection function to the system. When the vehicle is charged externally, the CC plug detection terminal can accurately detect the connection status of the charging gun, thereby achieving precise control of the charging process, and also helping to prevent safety problems such as overcharging and mischarging during the charging process, ensuring the safety of the vehicle and charging equipment, while also optimizing charging efficiency.

[0014] As an improvement, a detection switch (9) is connected to the K1 relay. Since the K1 relay plays an important role in the control logic of the entire charging system, such as being related to the vehicle ACC power supply, the detection switch can be used to promptly detect whether the K1 relay is working normally.

[0015] The advantages of the present invention compared with the prior art are: the present invention uses solar energy for charging, reduces dependence on traditional fossil energy, reduces carbon emissions of vehicles, and has significant environmental benefits. Through the on-board photovoltaic charging system, the vehicle can achieve self-charging to a certain extent, improving the energy self-sufficiency rate of the vehicle. Multiple relays and signal detectors and related switches in the system realize intelligent control of the charging process and power conversion. According to different states of the vehicle such as starting, stopping, external charging, etc., the system can automatically adjust the charging and power supply strategies to ensure the reasonable distribution and use of electric energy, and improve the safety and reliability of the system. The present invention integrates functions such as photovoltaic power generation, power control, battery storage, inverter charging and signal detection into one system, with a compact structure, which is easy to install and use on the vehicle. It can realize the conversion between direct current and alternating current, meet the needs of different electrical equipment in the vehicle, and improve the practicality of the system. The on-board photovoltaic charging system has many advantages such as environmental protection, energy saving, intelligence, and multi-function, can effectively solve some problems of vehicle charging, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the vehicle-mounted photovoltaic charging system.

[0017] Figure 2 It is the connection circuit diagram of the inverter charger of the vehicle-mounted photovoltaic charging system.

[0018] Figure 3 It is a schematic diagram of the connection relationship of the inverter charger of the vehicle-mounted photovoltaic charging system.

[0019] Figure 4 It is the circuit connection diagram of the vehicle-mounted photovoltaic charging system.

[0020] Figure 5 It is the connection diagram of the detection switch circuit of the vehicle-mounted photovoltaic charging system.

[0021] As shown in the figure: 1. Photovoltaic power generation panel, 2. Photovoltaic power generation controller, 3. Battery, 4. Inverter charging integrated machine, 5. Vehicle charging circuit, 6. Signal detector, 7. Voltage detection switch module, 8. Inverter switch, 9. Detection switch. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] In a specific implementation of the present invention, the vehicle-mounted photovoltaic charging system includes a photovoltaic power generation panel 1, which is connected to a photovoltaic power generation controller 2 through a wire, and the photovoltaic power generation controller 2 is connected to a battery 3 through a wire. The wire connecting the photovoltaic power generation controller 2 and the battery 3 is connected to an inverter charging machine 4, and the inverter charging machine 4 is connected to a vehicle charging line 5. The inverter charging machine 4 is also connected to a signal detector 6.

[0024] As an improvement, the input of photovoltaic panel 1 is DC37V, and this specific voltage specification is designed and optimized. Under common lighting conditions, this voltage enables the photovoltaic panel to effectively convert solar energy into electrical energy, ensuring that stable and sufficient electrical energy can be generated in most environments to supply the subsequent charging system.

[0025] As an improvement, the photovoltaic power generation controller 2 outputs DC24V, which is suitable for charging the battery. 24V is one of the common charging voltage specifications for vehicle batteries, which can charge the battery safely and efficiently, avoid overcharging or undercharging, and extend the battery life.

[0026] As an improvement, the input of the inverter charger 4 is DC24V, and the output is AC220V. The AC220V output is controlled by two 24V100A relays. When the external charging pile is charging, the 24V relay output is automatically disconnected when the signal is detected. When the external charging pile is unplugged, the 12V relay automatically connects to the inverter output to charge the power battery. The 24V input voltage can make full use of the electric energy stored in the battery, while ensuring the safe operation of the system, providing sufficient DC power for subsequent inverter operations.

[0027] As an improvement, the negative pole of battery 3 is connected to three relays through a signal detection switch, and the signal detection switch is connected to the vehicle ACC power switch K1. The relay is provided with pins 85, 86, 87, 87a and 30. Pin 85 is connected to the positive pole of battery 3. Pin 86 of each relay is connected together and connected to the other output end of the signal detection switch through a wire. Pin 87 of relay one is connected to the output inverter charger 4, pins 87 of relays two and three are respectively connected to the AC220V input neutral line and the AC220V input live line, pins 87a of relays two and three are respectively connected to the AC220V output neutral line and the AC220V output live line of the charger, pins 30 of relays two and three are respectively connected to the AC220V input neutral line and the AC220V input live line of the on-board charger, and the negative pole of the battery is connected to three relays through the signal detection switch. This connection method realizes intelligent control of the charging system. Through the coordinated work of the signal detection switch and the vehicle ACC power switch K1, the relay can be precisely controlled to be on and off according to the vehicle's operating status, such as starting, shutting down, and external charging. The specific connection method of the pins on the relay ensures that the circuit can be switched safely and orderly in different working scenarios, such as the power supply and AC output of the inverter charger. For example, when the vehicle is started, abnormal current loops can be prevented, avoiding damage to the vehicle's electrical system and charging equipment, thereby improving the safety and reliability of the system.

[0028] As an improvement, the inverter charger 4 is connected to the photovoltaic panel 1, the battery 3, the battery input, the signal detection and the AC220V output. This multi-connection design reflects the high integration of the system. All key components are connected to the inverter charger, making the transmission and conversion of electric energy in the system more efficient and smooth.

[0029] As an improvement, the photovoltaic power generation panel 1 is connected to the photovoltaic power generation controller 2 through a line, the photovoltaic power generation controller 2 is connected to the battery 3, the battery 3 is connected to the K1 relay through a wire, the K1 relay is connected to the K2, K3, and K4 relays through an inverter, the K2, K3, and K4 relays are connected in series to the inverter, the inverter is connected to the K5 relay, and the K5 relay is connected to the vehicle ACC power supply. The connection relationship between the various components ensures that the entire system can work together. For example, the electric energy generated by the photovoltaic power generation panel can pass through the controller, battery, relay, inverter and other components in turn to achieve efficient conversion from solar energy to available electric energy for the vehicle.

[0030] As an improvement, the inverter is connected to the CC plug detection terminal through the K4 relay. This connection method adds a plug detection function to the system. When the vehicle is charged externally, the CC plug detection terminal can accurately detect the connection status of the charging gun, thereby achieving precise control of the charging process, and also helping to prevent safety problems such as overcharging and mischarging during the charging process, ensuring the safety of the vehicle and charging equipment, while also optimizing charging efficiency.

[0031] As an improvement, a detection switch 7 is connected to the K1 relay. Since the K1 relay plays an important role in the control logic of the entire charging system, such as being related to the vehicle ACC power supply, the detection switch can be used to promptly detect whether the K1 relay is working normally.

[0032] Working principle of the present invention: This charging system uses solar power generation to invert into AC voltage to form the purpose of charging, which solves the problem that new energy vehicles cannot be charged on the road and cannot use electric drive. It is produced to save fuel costs and the increased electricity charges of household charging piles. Although it realizes AC slow charging, it can solve the problem that the power is reduced during driving and the charging pile cannot be found to replenish the power. When driving in the city, the power battery can be kept full at any time, reducing the power battery from often appearing in the state of power loss and resulting in a reduction in battery life. For example, 10% of the power is consumed on the way to work, and when the car is parked in the parking lot, the remaining time is given to the solar automatic charging device. The solar charging device will replenish the power of the power battery during the 4 hours of work. When traveling on the road, if the power battery is low, you will be very worried about running out of power and breaking down. The solar charging device will not leave people on the road or call a rescue vehicle to a place with a charging pile for charging. You only need to rest in the car for 2-3 hours to continue running 20-30km, and you will not camp in the wild or call for rescue, which will increase costs. AC slow charging causes little damage to the battery and can keep the battery fully charged for a long time. In winter, when the car is parked in the parking lot, the battery will maintain a certain temperature when the solar charging system is charging, which solves the problem of battery not being resistant to freezing and losing power.

[0033] The solar charging device consists of a photovoltaic panel, a charging controller, a battery, an inverter, and a signal detection switch light. It has the functions of easy installation, strong practicality, energy saving, environmental protection, and battery antifreeze. This inverter has the functions of automatic start and stop for battery voltage detection, temperature detection protection, charging voltage detection protection, reverse charging shutdown energy saving and reverse charging protection. It will automatically stop running when the battery voltage drops to 10% of the remaining power of DC20V. When the battery voltage rises to above DC24V, it will automatically start charging. When it is detected that the AC charging pile is used for charging, the AC current is prevented from flowing back to the inverter and causing damage to the inverter, and the 220V output line of the inverter will be automatically disconnected.

[0034] When the detection switch detects that the external charging pile is charging, the K1, K2, K3, and K4 relays disconnect the power supply and output ends of the inverter, disconnect the vehicle plug detection PC end, and keep the inverter in a stopped state. When it is detected that the external charging pile is unplugged, this relay connects the inverter to put it into working state. When the vehicle is started, relay K5 is energized and also disconnects the K1, K2, K3, and K4 relays, so that the vehicle will not detect the plug-in state and cannot move. When the vehicle cannot detect that the charging pile is used for charging and the vehicle is already in the parked and turned off state, the K1, K2, K3, and K4 relays are in a closed state to connect the inverter power supply line and output line and the CC plug detection end.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0039] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A vehicle-mounted photovoltaic charging system, comprising a photovoltaic power generation panel (1), characterized in that: The photovoltaic power generation panel (1) is connected to a photovoltaic power generation controller (2) via a wire, the photovoltaic power generation controller (2) is connected to a storage battery (3) via a wire, the wire connecting the photovoltaic power generation controller (2) and the storage battery (3) is connected to an inverter charging machine (4), the inverter charging machine (4) is connected to a vehicle charging line (5), the inverter charging machine (4) is also connected to a signal detector (6), the storage battery (3) is connected to a voltage detection switch module (7), and the voltage detection switch module (7) is connected to the inverter charging machine (4) via an inverter switch (8).

2. The vehicle-mounted photovoltaic charging system according to claim 1, characterized in that: The input of the photovoltaic panel (1) is DC36V.

3. The vehicle-mounted photovoltaic charging system according to claim 1, characterized in that: The output of the photovoltaic power generation controller (2) is DC24V.

4. The vehicle-mounted photovoltaic charging system according to claim 1, characterized in that: The input of the inverter charger (4) is DC24V and the output is AC220V.

5. The vehicle-mounted photovoltaic charging system according to claim 1, characterized in that: The negative pole of the battery (3) is connected to four relays through a signal detection switch, and the signal detection switch is connected to a vehicle ACC power relay K1. The relays are provided with pins 85, 86, 87, 87a and 30. Pin 85 is connected to the positive pole of the battery (3). Pins 86 of each relay are connected together and connected to the other output end of the signal detection switch through a wire. Pin 87 of relay K2 is connected to the inverter charger (4), and pin 87a of relay K3 is connected to the output end of the charger. Pins 87 of relays K3 and K4 are connected to the AC220V input neutral line and AC220V input live line of the charging pile, respectively. Pins 87a of relays K3 and K4 are connected to the AC220V input neutral line and AC220V input live line of the charging pile, respectively. The AC220V output neutral line and AC220V output live line of the charger are connected respectively, and the 30 pins of relays K3 and K4 are connected respectively to the AC220V input neutral line and AC220V input live line of the vehicle charger. The function of the signal detection switch (6) is that when it is detected that a home or commercial charging pile is used to charge the vehicle, the signal switch connects the K3 and K4 relay coils, so that the relay normally open contacts are closed to connect the charging pile and the vehicle charger circuit, and the vehicle power battery starts to charge. When the inverter is needed to charge, the detection switch disconnects the K3 and K4 relay coils, so that the relay normally open contacts disconnect the charging pile circuit, and the normally closed contacts connect the charging pile and the vehicle charger circuit to start charging.

6. The vehicle-mounted photovoltaic charging system according to claim 1, characterized in that: The inverter charging integrated machine (4) is connected to the photovoltaic panel (1), the storage battery (3), the signal detector (6) and the AC220V output.

7. The vehicle-mounted photovoltaic charging system according to claim 5, characterized in that: The photovoltaic power generation panel (1) is connected to the photovoltaic power generation controller (2) through a line, the photovoltaic power generation controller (2) is connected to the battery (3), the battery (3) is connected to the K1 relay through a wire, the K1 relay is respectively connected to the K2, K3, and K4 relays through an inverter, the K2, K3, and K4 relays are connected in series to the inverter, the inverter is connected to the K5 relay, and the K5 relay is connected to the vehicle ACC power supply.

8. The vehicle-mounted photovoltaic charging system according to claim 7, characterized in that: The inverter is connected to the CC plug detection terminal through the K4 relay.

9. The vehicle-mounted photovoltaic charging system according to claim 7, characterized in that: The K1 relay is connected with a detection switch (9).

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