Photovoltaic charging module

Abstract

The utility model relates to a photovoltaic charging module. The photovoltaic charging module comprises a chip U4, a capacity expansion module and a charging module, the capacity expansion module comprises a cascade connection inlet, a switch unit, a cascade connection output interface and a first input interface, the cascade connection inlet, the cascade connection output interface and the first input interface are electrically connected with the switch unit, and the chip U4 is electrically connected with the first input interface; the charging module comprises a power supply port, and the power supply port is electrically connected with the cascade output interface. According to the scheme provided by the invention, the charging speed can be increased, the charging efficiency is improved, and the charging time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a photovoltaic charging module. Background Art

[0002] A charger is a device that replenishes the battery and can charge mobile devices such as mobile phones and tablets.

[0003] In the related art, the charging speed of the charger is slow, the charging efficiency is low, and it takes a long time to charge. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a photovoltaic charging module that can increase the charging speed and improve the charging efficiency, thereby reducing the charging time.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a photovoltaic charging module, comprising:

[0007] Chip U4; an expansion module, the expansion module including a cascade connection inlet, a switch unit, a cascade output interface and a first input interface, the cascade connection inlet, the cascade output interface and the first input interface are electrically connected to the switch unit respectively, and the chip U4 is electrically connected to the first input interface; a charging module, the charging module including a power supply port, and the power supply port is electrically connected to the cascade output interface.

[0008] The switch unit includes a resistor R81 and a resistor R82 . A first end of the resistor R81 is electrically connected to the first input interface, and a second end of the resistor R81 is electrically connected to a first end of the resistor R82 .

[0009] The switch unit further includes a capacitor C44 and a transistor Q19 . A first end of the capacitor C44 is electrically connected to a second end of the resistor R82 , and a second end of the capacitor C44 is electrically connected to the transistor Q19 .

[0010] The switch unit further includes a resistor R78, a resistor R79, and a resistor R80. A first end of the resistor R78 is electrically connected to the transistor Q19, and a second end of the resistor R78 is electrically connected to a first end of the resistor R79 and a first end of the resistor R80, respectively.

[0011] The switch unit further includes a MOS transistor Q17 and a MOS transistor Q18. The second end of the resistor R79 is electrically connected to the MOS transistor Q17 and the MOS transistor Q18, respectively. The cascade output interface is electrically connected to the MOS transistor Q18. The cascade connection inlet is electrically connected to the MOS transistor Q17.

[0012] The charging module includes a second input interface, a resistor R64, a resistor R65, a capacitor C41 and a transistor Q20. The second input interface is electrically connected to the first end of the resistor R64, the second end of the resistor R64 is electrically connected to the first end of the resistor R65, the second end of the resistor R65 is electrically connected to the first end of the capacitor C41, and the second end of the capacitor C41 is electrically connected to the transistor Q20.

[0013] The charging module further includes a resistor R62, a resistor R63, and a resistor R61. A first end of the resistor R62 is electrically connected to the transistor Q20, a second end of the resistor R62 is electrically connected to a first end of the resistor R63, and a first end of the resistor R63 is also electrically connected to a first end of the resistor R61.

[0014] The charging module also includes a charging management chip U1, a MOS transistor Q12, a MOS transistor Q13, and an inductor L3. The charging management chip U1 is electrically connected to the MOS transistor Q12. The second end of the resistor R61 is electrically connected to the MOS transistor Q12 and the MOS transistor Q13, respectively. The second end of the resistor R63 is electrically connected to the MOS transistor Q13. The MOS transistors Q12 and Q13 are electrically connected. The first end of the inductor L3 is electrically connected to the MOS transistor Q13. The second end of the inductor L3 is electrically connected to the MOS transistor Q13.

[0015] The device further includes a photovoltaic module, which includes a photovoltaic access port, a MOS transistor Q1, a resistor R89, a diode ZD1, and a resistor R90. The photovoltaic access port is electrically connected to the MOS transistor Q1, a first end of the resistor R89 ​​is electrically connected to the MOS transistor Q1, a second end of the resistor R89 ​​is electrically connected to a first end of the diode ZD1, a second end of the diode ZD1 is electrically connected to a first end of the resistor R90, and a second end of the resistor R90 is electrically connected to a second end of the resistor R89.

[0016] The photovoltaic module also includes capacitors EC1, C1, and EC2. The first end of the capacitor EC1 is electrically connected to the MOS tube Q1, the second end of the capacitor EC1 is electrically connected to the first end of the capacitor C1, the second end of the capacitor C1 is electrically connected to the first end of the capacitor EC2, and the second end of the capacitor EC2 is electrically connected to the charging management chip U1.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] By setting up an expansion module, two photovoltaic charging modules can be connected through a cascade cable, thereby increasing the charging current, speeding up the charging speed and reducing the charging time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments.

[0020] Figure 1 This is a circuit diagram of the chip U4 in one embodiment of the present invention;

[0021] Figure 2 This is a circuit diagram of an expansion module in one embodiment of the present utility model;

[0022] Figure 3 This is a circuit diagram of a charging module in one embodiment of the present invention;

[0023] Figure 4 This is a circuit diagram of another embodiment of the charging module in one embodiment of the present utility model;

[0024] Figure 5 This is a circuit diagram of a photovoltaic module in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0026] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] A charger is a device that replenishes battery power and can charge mobile devices such as mobile phones and tablets. In related technologies, chargers have a slow charging speed and low charging efficiency, and require a long time to charge.

[0029] In response to the above problems, an embodiment of the present application provides a photovoltaic charging module that can increase the charging speed and improve the charging efficiency, thereby reducing the charging time.

[0030] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 、 Figure 2 and Figure 3 A photovoltaic charging module includes: a chip U4, an expansion module and a charging module. The expansion module includes a cascade connection inlet, a switch unit, a cascade output interface and a first input interface. The cascade connection inlet, the cascade output interface and the first input interface are electrically connected to the switch unit respectively, and the chip U4 is electrically connected to the first input interface; the charging module includes a power supply port, which is electrically connected to the cascade output interface.

[0032] It should be noted that chip U4 is an MCU chip. The power supply port is used to output current to external charging devices, and the cascade connection inlet is used to connect two photovoltaic charging modules via cascade cables to increase charging current and reduce charging time.

[0033] It should also be noted that one of the photovoltaic charging modules in this application can be used for capacity expansion, and the other can be used for charging. The two photovoltaic charging modules are connected to the photovoltaic panel at the same time. The power supply port of the first photovoltaic charging module is connected to the cascade connection inlet of the second photovoltaic charging module, and at the same time is connected to the cascade output interface with the switch unit, and is connected in parallel with the output voltage of the second photovoltaic charging module to the cascade output interface, and finally is electrically connected to the power supply port of the second photovoltaic charging module, thereby expanding the output current to twice the original.

[0034] See also Figure 2Specifically, the switch unit includes resistors R81 and R82. The first end of resistor R81 is electrically connected to the first input interface, and the second end of resistor R81 is electrically connected to the first end of resistor R82. Specifically, the switch unit also includes capacitor C44 and transistor Q19. The first end of capacitor C44 is electrically connected to the second end of resistor R82, and the second end of capacitor C44 is electrically connected to transistor Q19. Specifically, the switch unit also includes resistors R78, R79, and R80. The first end of resistor R78 is electrically connected to transistor Q19, and the second end of resistor R78 is electrically connected to the first end of resistor R79 and the first end of resistor R80, respectively. Specifically, the switch unit also includes MOS transistors Q17 and Q18. The second end of resistor R79 is electrically connected to MOS transistors Q17 and Q18, respectively. The cascade output interface is electrically connected to MOS transistor Q18, and the cascade connection input is electrically connected to MOS transistor Q17.

[0035] It should be noted that capacitor C44 plays a role in filtering out ripples in the circuit, resistors R78, R79, and transistor Q19 play a role in voltage division, resistor R80 plays a role in current limiting, and resistors R81 and R82 play a role in voltage division. Figure 2 CN2 in the cascade connection input is connected to MOS tubes Q17 and MOS tubes Q18, and then to the cascade output interface. When chip U4 detects that the cascade connection input is connected, the 8th pin NET-8 of chip U4 will send a high level through resistors R81, R82 and transistor Q19 to turn on MOS tubes Q17 and MOS tubes Q18, so that the input voltage passes through MOS tubes Q17 and MOS tubes Q18 to the cascade output interface and is combined with the voltage of the original power supply port to achieve capacity expansion function, and the charging current will be greatly improved.

[0036] See also Figure 3 and Figure 4In one embodiment, the charging module includes a second input interface, a resistor R64, a resistor R65, a capacitor C41, and a transistor Q20. The second input interface is electrically connected to the first end of resistor R64, the second end of resistor R64 is electrically connected to the first end of resistor R65, the second end of resistor R65 is electrically connected to the first end of capacitor C41, and the second end of capacitor C41 is electrically connected to transistor Q20. Specifically, the charging module also includes resistors R62, R63, and R61. The first end of resistor R62 is electrically connected to transistor Q20, the second end of resistor R62 is electrically connected to the first end of resistor R63, and the first end of resistor R63 is also electrically connected to the first end of resistor R61. Specifically, the charging module also includes a charging management chip U1, a MOS transistor Q12, a MOS transistor Q13 and an inductor L3. The charging management chip U1 is electrically connected to the MOS transistor Q12, the second end of the resistor R61 is electrically connected to the MOS transistor Q12 and the MOS transistor Q13 respectively, the second end of the resistor R63 is electrically connected to the MOS transistor Q13, the MOS transistor Q12 is electrically connected to the MOS transistor Q13, the first end of the inductor L3 is electrically connected to the MOS transistor Q13, and the second end of the inductor L3 is electrically connected to the cascade output interface.

[0037] It should be noted that resistors R62, R63, R61, R64 and R65 are all voltage divider resistors. Figure 3 When chip U4 detects that the output port is connected to a charging cable, the NET-17 pin of chip U4 will send a high level through resistors R64, R65, and transistor Q20 to turn on MOS transistors Q12 and Q13, and transmit the output voltage of charging management chip U1 to the power supply port through MOS transistors Q12 and Q13.

[0038] See also Figure 5 In one embodiment, the photovoltaic module further includes a photovoltaic module, which includes a photovoltaic access port, a MOS transistor Q1, a resistor R89, a diode ZD1, and a resistor R90. The photovoltaic access port is electrically connected to the MOS transistor Q1, the first end of the resistor R89 ​​is electrically connected to the MOS transistor Q1, the second end of the resistor R89 ​​is electrically connected to the first end of the diode ZD1, the second end of the diode ZD1 is electrically connected to the first end of the resistor R90, and the second end of the resistor R90 is electrically connected to the second end of the resistor R89. Specifically, the photovoltaic module also includes capacitors EC1, C1, and EC2. The first end of capacitor EC1 is electrically connected to the MOS transistor Q1, the second end of capacitor EC1 is electrically connected to the first end of capacitor C1, the second end of capacitor C1 is electrically connected to the first end of capacitor EC2, and the second end of capacitor EC2 is connected to the charge management chip U1.

[0039] It should be noted that this application can charge charging devices outdoors without a plug by setting up a photovoltaic module. During operation, the photovoltaic panel can be connected to the photovoltaic access port, which is CN1 here. The positive pole of the photovoltaic access port is connected to capacitors EC1, EC2, and C1 for filtering, and then connected to the charging management chip U1; the negative pole of the photovoltaic access port is connected to the MOS tube Q1, where resistors R89 and R90 act as a voltage divider, and diode ZD1 acts as a reverse connection protection. Finally, it is connected to the GND terminal of the charging management chip U1 through diode ZD1, thereby completing the process of photovoltaic power generation.

[0040] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0041] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A photovoltaic charging module, characterized in that: include: Chip U4; an expansion module, the expansion module including a cascade connection inlet, a switch unit, a cascade output interface, and a first input interface, the cascade connection inlet, the cascade output interface, and the first input interface being electrically connected to the switch unit, respectively, and the chip U4 being electrically connected to the first input interface; A charging module includes a power supply port, and the power supply port is electrically connected to the cascade output interface.

2. The photovoltaic charging module according to claim 1, characterized in that: The switch unit includes a resistor R81 and a resistor R82 . A first end of the resistor R81 is electrically connected to the first input interface, and a second end of the resistor R81 is electrically connected to a first end of the resistor R82 .

3. The photovoltaic charging module according to claim 2, characterized in that: The switch unit further includes a capacitor C44 and a transistor Q19 . A first end of the capacitor C44 is electrically connected to a second end of the resistor R82 , and a second end of the capacitor C44 is electrically connected to the transistor Q19 .

4. The photovoltaic charging module according to claim 3, characterized in that: The switch unit further includes a resistor R78, a resistor R79, and a resistor R80. A first end of the resistor R78 is electrically connected to the transistor Q19, and a second end of the resistor R78 is electrically connected to a first end of the resistor R79 and a first end of the resistor R80, respectively.

5. The photovoltaic charging module according to claim 4, characterized in that: The switch unit further includes a MOS transistor Q17 and a MOS transistor Q18. The second end of the resistor R79 is electrically connected to the MOS transistor Q17 and the MOS transistor Q18, respectively. The cascade output interface is electrically connected to the MOS transistor Q18. The cascade connection inlet is electrically connected to the MOS transistor Q17.

6. The photovoltaic charging module according to claim 1, characterized in that: The charging module includes a second input interface, a resistor R64, a resistor R65, a capacitor C41 and a transistor Q20. The second input interface is electrically connected to the first end of the resistor R64, the second end of the resistor R64 is electrically connected to the first end of the resistor R65, the second end of the resistor R65 is electrically connected to the first end of the capacitor C41, and the second end of the capacitor C41 is electrically connected to the transistor Q20.

7. The photovoltaic charging module according to claim 6, characterized in that: The charging module further includes a resistor R62, a resistor R63, and a resistor R61. A first end of the resistor R62 is electrically connected to the transistor Q20, a second end of the resistor R62 is electrically connected to a first end of the resistor R63, and a first end of the resistor R63 is also electrically connected to a first end of the resistor R61.

8. The photovoltaic charging module according to claim 7, characterized in that: The charging module also includes a charging management chip U1, a MOS transistor Q12, a MOS transistor Q13, and an inductor L3. The charging management chip U1 is electrically connected to the MOS transistor Q12. The second end of the resistor R61 is electrically connected to the MOS transistor Q12 and the MOS transistor Q13, respectively. The second end of the resistor R63 is electrically connected to the MOS transistor Q13. The MOS transistors Q12 and Q13 are electrically connected. The first end of the inductor L3 is electrically connected to the MOS transistor Q13. The second end of the inductor L3 is electrically connected to the MOS transistor Q13.

9. The photovoltaic charging module according to claim 8, characterized in that: The device further includes a photovoltaic module, which includes a photovoltaic access port, a MOS transistor Q1, a resistor R89, a diode ZD1, and a resistor R90. The photovoltaic access port is electrically connected to the MOS transistor Q1, a first end of the resistor R89 ​​is electrically connected to the MOS transistor Q1, a second end of the resistor R89 ​​is electrically connected to a first end of the diode ZD1, a second end of the diode ZD1 is electrically connected to a first end of the resistor R90, and a second end of the resistor R90 is electrically connected to a second end of the resistor R89.

10. The photovoltaic charging module according to claim 9, characterized in that: The photovoltaic module also includes capacitors EC1, C1, and EC2. The first end of the capacitor EC1 is electrically connected to the MOS tube Q1, the second end of the capacitor EC1 is electrically connected to the first end of the capacitor C1, the second end of the capacitor C1 is electrically connected to the first end of the capacitor EC2, and the second end of the capacitor EC2 is electrically connected to the charging management chip U1.

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