CN107733066A - A solar charging control circuit - Google Patents

Abstract

The invention discloses a solar charging control circuit, which comprises an anti-reverse connection and lightning protection circuit, a pre-stage filter circuit, a control module, a voltage detection circuit, a charging circuit, a circuit for preventing current sinking, a post-stage filter circuit and a storage battery anti-reverse connection circuit ; The input and output of the anti-reverse lightning protection circuit are respectively connected to the output of the solar panel and the input of the pre-filter circuit, the output of the pre-filter circuit is connected to the input of the charging circuit, and the output of the charging circuit The terminal is connected to the battery after passing through the anti-sink circuit, the post-stage filter circuit and the battery anti-reverse connection circuit in turn; the control output terminal of the control module is connected to the control terminal of the charging circuit; the input terminal of the voltage detection circuit is connected to the output of the pre-stage filter circuit terminal, and the output terminal is connected to the signal input terminal of the control module. The invention adds an automatic dormancy function to the controller, reduces the extra energy loss of the accumulator, and better protects the service life of the accumulator.

Description

A solar charging control circuit

technical field

The invention relates to a solar charging control circuit, which belongs to the technical field of photovoltaic power generation.

Background technique

In recent years, my country has increased investment in renewable energy, and the photovoltaic power generation industry has grown rapidly. With the gradual improvement of solar panel manufacturing technology, the efficiency of photovoltaic power generation has increased significantly. In addition, battery technology is also improving, with smaller volume and higher capacity. bigger.

At present, there are countless types of photovoltaic power generation control systems on the market, but there are very few controllers that can really improve the utilization rate of solar energy. Most of them ignore the energy loss of the controller itself, which reduces the battery life and increases the battery life. put in.

Therefore, it is necessary to design a solar charging control circuit that reduces the internal energy loss of the controller to better monitor the state of the battery.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention proposes a solar charging control circuit, which especially considers the internal energy consumption of the controller, and has the characteristics of low construction cost, easy installation, etc., and has a better monitoring function for the battery life .

The technical scheme that the present invention solves its technical problem to take is:

A solar charging control circuit provided by an embodiment of the present invention includes an anti-reverse connection lightning protection circuit, a pre-stage filter circuit, a control module, a voltage detection circuit, a charging circuit, an anti-current sink circuit, a post-stage filter circuit, and a battery anti-reverse circuit. connected to the circuit; the input end of the anti-reverse lightning protection circuit is connected to the output end of the solar panel, the output end is connected to the input end of the pre-stage filter circuit, and the output end of the pre-stage filter circuit is connected to the input end of the charging circuit connected, the output end of the charging circuit is connected to the battery after passing through the current prevention circuit, the post-stage filter circuit and the anti-reverse connection circuit of the battery in sequence; the control output end of the control module is connected to the control end of the charging circuit; the voltage The input terminal of the detection circuit is connected with the output terminal of the pre-filter circuit, and the output terminal is connected with the signal input terminal of the control module.

As a possible implementation of this embodiment, in the anti-reverse connection lightning protection circuit and the pre-filter circuit, the positive pole of the solar panel is connected to one end of the self-recovery insurance F1, and the other end of the self-recovery insurance F1 is connected to one end of the TVS diode and One end of the choke inductor L2 is connected, the other end of the TVS diode is grounded, one end of the resistor R14 is connected to one end of the inductor L2, the gate of the N-MOS transistor Q3 is connected to the other end of the resistor R14, and the gate of the N-MOS transistor Q3 Connect to one end of the pull-down resistor R11, the drain of the N-MOS transistor Q3 is connected to the other end of the pull-down resistor R11 and then grounded, the source of the N-MOS transistor Q3 is connected to the negative pole of the solar panel, and the other end of the inductor L2 is respectively connected to the capacitor C6 One end of capacitor C5, one end of capacitor C3, one end of resistor R5, one end of resistor R2, one end of capacitor C2 are connected to the source of P-MOS transistor Q1, and the other end of capacitor C6 and capacitor C5 is connected to capacitor C3 rear ground terminal.

As a possible implementation of this embodiment, in the control module, the other end of the resistor R5 is connected to the anode of the red light-emitting diode D3, the other end of the resistor R2 is connected to the anode of the green light-emitting diode D4, and the other end of the red light-emitting diode D3 The negative pole is connected to the third pin of the integrated charging management chip CN3767, the negative pole of D4 is connected to the fourth pin of the integrated charging management chip CN3767, and the other end of the capacitor C2 is connected to the first pin of the integrated charging management chip CN3767. The second pin of the integrated chip CN3767 is grounded, the fifth pin of the charging management integrated chip CN3767 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded.

As a possible implementation of this embodiment, in the voltage detection circuit, charging circuit, preventing current sinking circuit, post-stage filter circuit and battery anti-reverse connection circuit, the tenth pin of the charging management integrated chip CN3767 is connected to the P-MOS The gate of the tube Q1 is connected, the ninth pin of the charging management integrated chip CN3767 is connected to one end of the resistor R1 and one end of the capacitor C3, the sixth pin of the charging management integrated chip CN3767 is connected to the other end of the resistor R1 and one end of the resistor R4 connection, the other end of resistor R4 is grounded, the drain of the P-MOS tube is connected to the positive pole of diode D1, the negative pole of diode D1 is connected to one end of inductor L1 and the negative pole of diode D2, the positive pole of diode D2 is grounded, and the other end of inductor L1 Connect to one end of the resistor Rcs, the two ends of the resistor Rcs are respectively connected to the 8th pin and the 7th pin of the charging management integrated chip CN3767, the other end of the resistor Rcs is connected to the positive pole of the electrolytic capacitor C7, one end of the capacitor C1 and the inductor L3 One end of the capacitor C1 is connected to the ground, the negative electrode of the electrolytic capacitor C7 is grounded, the other end of the inductor L3 is connected to the positive end of the battery BT1 and one end of the resistor R12, and the other end of the resistor R12 is connected to the gate of the N-MOS transistor Q4 It is connected to one end of the resistor R13, the other end of the resistor R13 is grounded together with the source of the N-MOS transistor Q4, and the drain of the N-MOS transistor Q4 is connected to the negative terminal of the storage battery BT1.

As a possible implementation of this embodiment, the solar charging control circuit of this embodiment further includes a battery overcharge and overdischarge protection circuit, and the input terminal of the battery overcharge and overdischarge protection circuit passes through the battery anti-reverse connection circuit. It is connected to the storage battery, and the output terminal is connected to the input terminal of the load.

As a possible implementation of this embodiment, in the battery overshoot and overdischarge protection circuit, the positive pole of the electrolytic capacitor C7 is connected to the positive pole of the output load terminal P2, one end of the resistor R9 and one end of the resistor R6, and the other end of the resistor R9 Connect one end of the resistor R10, the fourth pin of the battery detection integrated circuit CN302 and one end of the capacitor C11, the other end of the resistor R10 and the other end of the capacitor C11 are connected to the ground, and the other end of the resistor R6 is connected to the battery detection integrated circuit CN302 The first pin of the capacitor is connected to one end of the resistor R7, one end of the capacitor C9 and one end of the capacitor C10 are connected to the first pin of the battery detection integrated circuit CN302, the other end of the capacitor C9, the other end of the capacitor C10 and the battery detection integrated circuit The second pin of CN302 is commonly grounded, the third pin of the battery detection integrated circuit CN302 is connected to the anode of the red light-emitting diode D5, the negative pole of the red light-emitting diode D5 is grounded, and the other end of the resistor R7 is integrated with one end of the resistor R8 and the battery detection The sixth pin of the circuit CN302 is connected, the other end of the resistor R8 is grounded, the fifth pin of the battery detection integrated circuit CN302 is connected to the gate of the N-MOS transistor Q2, and the drain of the N-MOS transistor Q2 is connected to the output load terminal P2 The negative electrode of the N-MOS transistor Q2 is connected to the ground.

The beneficial effects that the technical solutions of the embodiments of the present invention may have are as follows:

The technical solution of the embodiment of the present invention includes an anti-reverse connection lightning protection circuit, a pre-stage filter circuit, a control module, a voltage detection circuit, a charging circuit, an anti-current sink circuit, a post-stage filter circuit, and a battery anti-reverse connection circuit; the anti-reverse connection The input end of the lightning protection circuit is connected to the output end of the solar panel, the output end is connected to the input end of the pre-stage filter circuit, the output end of the pre-stage filter circuit is connected to the input end of the charging circuit, and the output of the charging circuit The terminal is connected to the battery after passing through the anti-sink circuit, the post-stage filter circuit and the battery anti-reverse connection circuit in turn; the control output terminal of the control module is connected to the control terminal of the charging circuit; the input terminal of the voltage detection circuit is connected to the front-stage The output end of the filter circuit is connected with the signal input end of the control module. The present invention not only realizes that when there is no light, that is, when the solar panel has no output, the controller automatically enters the dormant state to reduce the extra energy loss of the battery, but also better protects the life of the battery and makes the battery last longer. Battery life.

The technical solution of the embodiment of the present invention adds the function of automatic dormancy to the functions of the existing solar charge controllers on the market, improves the ability of charging the battery in stages, reduces the cost and space occupied by the solar charge controller, and optimizes The charging capacity of the controller is improved. Through the optimization of the internal circuit of the solar charge controller, the extra energy loss of the solar charge controller is reduced, and the endurance of the battery is enhanced. Therefore, the load can be charged more safely and reliably, and the endurance of the battery is guaranteed. more durable.

The integrated chip CN3767 used in the technical solution of the embodiment of the present invention is a control chip for charging a storage battery. The voltage signal of the solar panel, and judge whether the voltage signal is at the maximum power point voltage of the solar panel. If it reaches the maximum power point voltage of the solar panel, it will use constant current charging. At this moment, the charging current is determined by the resistance value of the resistor Rcs. When it is detected that the solar panel has no voltage output or the voltage of the solar panel is lower than the battery voltage, the integrated circuit chip CN3767 turns off the output of the 10th pin and the 3rd pin of the chip, enters the sleep state, and the function of the diode D1 In order to prevent the current of the battery from pouring into the integrated circuit CN3767, avoid the extra output of the battery.

Description of drawings

Fig. 1 is an original diagram of a solar charging control circuit shown according to an exemplary embodiment;

Fig. 2 is a circuit diagram of an anti-reverse connection lightning protection circuit and a pre-stage filter circuit according to an exemplary embodiment;

Fig. 3 is a circuit diagram of a control module shown according to an exemplary embodiment;

Fig. 4 is a circuit diagram showing a voltage detection circuit, a charging circuit, an anti-current sink circuit, a post-stage filter circuit, and a battery anti-reverse connection circuit according to an exemplary embodiment;

Fig. 5 is a specific circuit diagram of a solar charging control circuit (excluding battery overcharge and overdischarge protection circuit) shown according to an exemplary embodiment;

Fig. 6 is a circuit diagram of a battery overcharge and overdischarge protection circuit according to an exemplary embodiment.

detailed description

In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.

As shown in Figure 1, a solar charging control circuit described in this embodiment includes an anti-reverse connection lightning protection circuit, a pre-stage filter circuit, a control module, a voltage detection circuit, a charging circuit, an anti-current sink circuit, and a post-stage filter circuit and battery anti-reverse connection circuit; the input end of the anti-reverse connection lightning protection circuit is connected to the output end of the solar panel, the output end is connected to the input end of the pre-stage filter circuit, and the output end of the pre-stage filter circuit It is connected with the input terminal of the charging circuit, and the output terminal of the charging circuit is connected with the storage battery after passing through the anti-current circuit, the post-stage filter circuit and the anti-reverse connection circuit of the storage battery in sequence; the control output terminal of the control module is connected with the control of the charging circuit The input end of the voltage detection circuit is connected to the output end of the pre-stage filter circuit, and the output end is connected to the signal input end of the control module. This embodiment can not only realize that when there is no light, that is, when the solar panel has no output, the controller automatically enters the dormant state to reduce the extra loss of battery energy, but also better protect the life of the battery and make the battery last longer. battery life.

As shown in Figure 2 and Figure 5, as a possible implementation of this embodiment, in the anti-reverse connection lightning protection circuit and the pre-stage filter circuit, P1 is the access terminal of the solar panel, and the positive pole of the solar panel is connected to the self-recovery fuse One end of F1 is connected, the other end of self-recovery insurance F1 is connected with one end of TVS diode and one end of choke inductor L2, the other end of TVS diode is grounded, one end of resistor R14 is connected with one end of inductor L2, and the N-MOS transistor Q3 The gate is connected to the other end of the resistor R14, the gate of the N-MOS transistor Q3 is connected to one end of the pull-down resistor R11, the drain of the N-MOS transistor Q3 is connected to the other end of the pull-down resistor R11 and grounded, and the gate of the N-MOS transistor Q3 The source is connected to the negative pole of the solar panel, and the other end of the inductor L2 is respectively connected to one end of the capacitor C6, one end of the capacitor C5, one end of the capacitor C3, one end of the resistor R5, one end of the resistor R2, one end of the capacitor C2 and the P-MOS tube The source of Q1 is connected, and the other ends of capacitor C6, capacitor C5 and capacitor C3 are connected to the ground terminal. The anti-reverse connection and lightning protection circuit is composed of self-recovery insurance F1, TVS diode, pull-down resistor R11, resistor R14, N-MOS tube Q3 and choke coil inductor L2 to prevent artificial access to the solar panel power supply When wiring, the circuit is damaged due to the reverse connection of the wires, and the equipment is prevented from being damaged by lightning. The pre-filter circuit is composed of capacitor C6, capacitor C5, capacitor C3 and capacitor C2.

As shown in Figure 3 and Figure 5, as a possible implementation of this embodiment, in the control module, the CN3767 chip of Ruyun manufacturer is used, the other end of the resistor R5 is connected to the anode of the red light-emitting diode D3, and the other end of the resistor R2 The other end is connected to the positive pole of the green light-emitting diode D4, the negative pole of the red light-emitting diode D3 is connected to the third pin of the charging management integrated chip CN3767, the negative pole of D4 is connected to the fourth pin of the charging management integrated chip CN3767, and the capacitor C2 The other end is connected to the first pin of the charging management integrated chip CN3767, the second pin of the charging management integrated chip CN3767 is grounded, the fifth pin of the charging management integrated chip CN3767 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to One end of the capacitor C4 is connected, and the other end of the capacitor C4 is grounded. The charging state display circuit is composed of resistor R2, resistor R5, red light-emitting diode D3 and green light-emitting diode D4. When the red light-emitting diode D3 is on in Figure 3, it means that the system is charging the battery with trickle current, constant current charging and In the state of overcharge, when the green light-emitting diode D4 lights up, it means that the system is floating charging the battery.

As shown in Figure 4 and Figure 5, as a possible implementation of this embodiment, the charging management integrated chip CN3767 The 10th pin of the charging management integrated chip CN3767 is connected to the gate of the P-MOS transistor Q1, the 9th pin of the charging management integrated chip CN3767 is connected to one end of the resistor R1 and one end of the capacitor C3, and the sixth pin of the charging management integrated chip CN3767 is connected to the resistor The other end of R1 is connected to one end of resistor R4, the other end of resistor R4 is grounded, the drain of P-MOS transistor Q1 is connected to the anode of diode D1, the cathode of diode D1 is connected to one end of inductor L1 and the cathode of diode D2, and the diode The positive pole of D2 is grounded, the other end of the inductor L1 is connected to one end of the resistor Rcs, the two ends of the resistor Rcs are respectively connected to the 8th pin and the 7th pin of the charging management integrated chip CN3767, and the other end of the resistor Rcs is connected to the electrolytic capacitor C7 The positive pole of the capacitor C1 is connected to one end of the inductor L3, the other end of the capacitor C1 is grounded, the negative pole of the electrolytic capacitor C7 is grounded, the other end of the inductor L3 is connected to the positive terminal of the battery BT1 and one end of the resistor R12, and the other end of the resistor R12 One end is connected to the gate of the N-MOS transistor Q4 and one end of the resistor R13, the other end of the resistor R13 is grounded together with the source of the N-MOS transistor Q4, and the drain of the N-MOS transistor Q4 is connected to the negative terminal of the battery BT1. The voltage detection circuit is composed of R1, R4 and charging management integrated chip CN3767, which is used to detect the output voltage value of the solar panel by the MPPT pin of the control chip CN3767, and then change the charging mode. The current detection circuit is composed of the resistor and the CSP pin and BAT pin of the chip CN3767, which is used to detect the charging current of the battery, and return the detected current value to the inside of the CN3767 chip to adjust the charging current. The power switch circuit is composed of P-MOS transistor Q1 and the DRV pin of the chip CN3767, which is used to deliver current to the battery. The magnitude of the delivered current is controlled by the pulse sent by the DRV pin of the CN3767 chip. Diode D1 constitutes an anti-current sink circuit, which is used to prevent the battery current from passing through the AO3407 chip, thereby reducing power consumption. The Buck power supply circuit is composed of P-MOS transistor Q1, diode D1, diode D2 and inductor L1, which is used to provide a stable and reliable voltage for the battery.

This embodiment adds the function of automatic dormancy to the functions of the existing solar charge controllers in the market, improves the ability of staged charging of the storage battery, reduces the cost and occupied space of the solar charge controller, and optimizes the controller The charging capacity, through the optimization of the internal circuit of the solar charge controller, reduces the extra energy loss of the solar charge controller and enhances the endurance of the battery, so it can charge the load more safely and reliably, ensuring a longer battery life.

As shown in Figure 1, in a possible implementation, the solar charge control circuit in the above embodiment further includes a battery overcharge and overdischarge protection circuit, and the input terminal of the battery overcharge and overdischarge protection circuit passes through the battery The anti-reverse connection circuit is connected to the battery, and the output terminal is connected to the input terminal of the load, which is used to prevent the battery from being damaged due to excessive discharge and excessive charging of the battery, so as not to affect the life of the battery.

As shown in Figure 6, in a possible implementation, in the battery overshoot and overdischarge protection circuit, the positive pole of the electrolytic capacitor C7 is connected to the positive pole of the output load terminal P2, one end of the resistor R9 and one end of the resistor R6, and the resistor The other end of R9 is connected to one end of resistor R10, the fourth pin of battery detection integrated circuit CN302 and one end of capacitor C11, the other end of resistor R10 and the other end of capacitor C11 are connected to the ground, and the other end of resistor R6 is connected to the battery The first pin of the detection integrated circuit CN302 is connected to one end of the resistor R7, one end of the capacitor C9 and one end of the capacitor C10 are connected to the first pin of the battery detection integrated circuit CN302, the other end of the capacitor C9, the other end of the capacitor C10 and The second pin of the battery detection integrated circuit CN302 is commonly grounded, the third pin of the battery detection integrated circuit CN302 is connected to the positive pole of the red light-emitting diode D5, the negative pole of the red light-emitting diode D5 is grounded, the other end of the resistor R7 is connected to one end of the resistor R8 It is connected to the 6th pin of the battery detection integrated circuit CN302, the other end of the resistor R8 is grounded, the 5th pin of the battery detection integrated circuit CN302 is connected to the gate of the N-MOS transistor Q2, and the drain of the N-MOS transistor Q2 is connected to the The negative pole of the output load terminal P2 is connected, and the source of the N-MOS transistor Q2 is grounded. The light emitting diode D5 in FIG. 6 lights up to indicate that the storage battery BT1 in FIG. 5 is fully charged.

The integrated chip CN3767 used in this embodiment is a control chip for charging a storage battery. Voltage signal, and judge whether the voltage signal is at the maximum power point voltage of the solar panel. If it reaches the maximum power point voltage of the solar panel, it will use constant current charging. When the solar panel has no voltage output or the voltage of the solar panel is lower than the battery voltage, the integrated circuit chip CN3767 turns off the output of the 10th pin and the 3rd pin of the chip, and enters a dormant state. The function of the diode D1 is to prevent the battery from The current is poured into the integrated circuit CN3767 to avoid the extra output of the battery.

This embodiment solves the problem of insufficient battery life in the current market by adding an automatic sleep function to the function of the solar charge controller commonly used in the market. The solar charge control circuit enhances the battery life and reduces solar energy. The additional loss increases the conversion efficiency of the solar charge controller and the utilization rate of solar energy to a certain extent.

The above is only a preferred embodiment of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered as the present invention. protection scope of the invention.

Claims (6)

1. a kind of solar charging electric control circuit, it is characterized in that, including anti-reverse lightning protection circuit, prime filter circuit, control mould Block, voltage detecting circuit, charging circuit, prevent sink current circuit, rear class filtering circuit and battery reverse-connection preventing circuit；It is described anti- The input of reversal connection lightning protection circuit and the output end of solar panel connect, and output end and the input of prime filter circuit connect Connect, the output end of the prime filter circuit and the input of charging circuit connect, and the output end of the charging circuit passes through successively Cross after preventing sink current circuit, rear class filtering circuit and battery reverse-connection preventing circuit and be connected with battery；The control module The control terminal of control output end and charging circuit connects；The input of the voltage detecting circuit and the output of prime filter circuit The signal input part of end, output end and control module connects.

2. a kind of solar charging electric control circuit as claimed in claim 1, it is characterized in that, in anti-reverse lightning protection circuit and prime Filter circuit, the positive pole of solar panels are connected with self- recoverage insurance F1 one end, the self- recoverage insurance F1 other end and the poles of TVS bis- One end of pipe connects with choke inductance L2 one end, the other end of TVS diode ground connection, resistance R14 one end and inductance L2's One end is connected, and N-MOS pipes Q3 grid is connected with the resistance R14 other end, N-MOS pipes Q3 grid and pull down resistor R11 mono- End connection, N-MOS pipes Q3 drain electrode are grounded after being connected with the pull down resistor R11 other end, N-MOS pipes Q3 source electrode and solar energy The negative pole connection of plate, the inductance L2 other end one end with electric capacity C6, electric capacity C5 one end, electric capacity C3 one end, resistance respectively R5 one end, resistance R2 one end, electric capacity C2 one end connect with P-MOS pipe Q1 source electrodes, electric capacity C6, electric capacity C5 and electric capacity C3's Earth terminal after the other end is connected.

3. a kind of solar charging electric control circuit as claimed in claim 2, it is characterized in that, in the control module, resistance R5's The other end is connected with red light emitting diodes D3 positive pole, and the resistance R2 other end connects with color green LED D4 positive pole Connect, red light emitting diodes D3 negative pole is connected with Charge Management integrated chip CN3767 the 3rd pin, D4 negative pole and charging Integrated chip CN3767 the 4th pin connection is managed, the electric capacity C2 other end draws with the 1st of Charge Management integrated chip CN3767 Pin connects, Charge Management integrated chip CN3767 the 2nd pin ground connection, Charge Management integrated chip CN3767 the 5th pin with Resistance R3 one end is connected, and the resistance R3 other end is connected with electric capacity C4 one end, electric capacity C4 other end ground connection.

4. a kind of solar charging electric control circuit as claimed in claim 3, it is characterized in that, in voltage detecting circuit, charging electricity Road, prevent in sink current circuit, rear class filtering circuit and battery reverse-connection preventing circuit, the of Charge Management integrated chip CN3767 10 pins are connected with P-MOS pipes Q1 grid, Charge Management integrated chip CN3767 the 9th pin and resistance R1 one end and electricity Hold C3 one end connection, Charge Management integrated chip CN3767 the 6th pin and the resistance R1 other end and resistance R4 one end Connection, resistance R4 other end ground connection, P-MOS pipes Q1 drain electrode is connected with diode D1 positive pole, diode D1 negative pole and Inductance L1 one end connects with diode D2 negative pole, diode D2 plus earth, and the inductance L1 other end is with resistance Rcs's One end is connected, and resistance Rcs both ends are connected with Charge Management integrated chip CN3767 the 8th pin and the 7th pin respectively, resistance The Rcs other end is connected with one end of electrochemical capacitor C7 positive pole, electric capacity C1 one end and inductance L3, electric capacity C1 another termination Ground, electrochemical capacitor C7 negative pole ground connection, the inductance L3 other end are connected with one end of battery BT1 positive terminal and resistance R12, The resistance R12 other end is connected with N-MOS pipes Q4 grid and resistance R13 one end, the resistance R13 other end and N-MOS pipe Q4 source electrode common ground, N-MOS pipes Q4 drain electrode are connected with battery BT1 negative pole end.

5. a kind of solar charging electric control circuit as claimed in claim 4, it is characterized in that, in addition to battery crosses to break through and puts guarantor Protection circuit, the battery overshoot the input of over-discharge protection circuit by being connected after battery reverse-connection preventing circuit with battery, Output end is connected with the incoming end loaded.

6. a kind of solar charging electric control circuit as claimed in claim 5, it is characterized in that, in battery overshoot Cross prevention electricity Lu Zhong, electrochemical capacitor C7 positive pole are connected with one end of output loading end P2 positive pole, resistance R9 one end and resistance R6, resistance The R9 other end is connected with resistance R10 one end, battery detecting integrated circuit CN302 the 4th pin and electric capacity C11 one end, The resistance R10 other end and electric capacity C11 other end access ground terminal, resistance the R6 other end and battery detecting integrated circuit CN302 the 1st pin connects with resistance R7 one end, electric capacity C9 one end and electric capacity C10 one end and the integrated electricity of battery detecting Road CN302 the 1st pin connection, the electric capacity C9 other end, the electric capacity C10 other end and battery detecting integrated circuit CN302 2nd pin common ground, battery detecting integrated circuit CN302 the 3rd pin is connected with red light emitting diodes D5 positive pole, red Color light emitting diode D5 negative pole ground connection, the resistance R7 other end and resistance R8 one end and battery detecting integrated circuit CN302 The connection of the 6th pin, resistance R8 other end ground connection, battery detecting integrated circuit CN302 the 5th pin is with N-MOS pipes Q2's Grid is connected, and N-MOS pipes Q2 drain electrode is connected with output loading end P2 negative pole, N-MOS pipes Q2 source ground.