CN204992743U - Solar car charging circuit - Google Patents

Abstract

The utility model discloses a solar car charging circuit, including solar panel T, diode D3, triode V1 and schmidt trigger U1, diode D3's negative pole, electric capacity C1, triode V1's collecting electrode and inductance L1 are connected to solar panel T's one end, and electric capacity C1's the other end, electric capacity C2, electric capacity C3, resistance R3, battery E, triode V2's projecting pole and solar panel T's the other end are connected to diode D3's positive pole. The utility model discloses solar car charging circuit simple structure, components and parts are few, constitute charge control module through two schmidt trigger, have realized the charge protection that crosses to car battery, have consequently that the cost of manufacture is low, an advantage of long service life and stable performance.

Description

A solar car charging circuit

technical field

The utility model relates to a charging circuit, in particular to a solar car charging circuit with simple structure and precise control.

Background technique

Solar car is an energy-saving and environment-friendly car developed by the optoelectronics industry in recent years, which can effectively reduce the emission of greenhouse gases such as carbon dioxide, so it has become a key research direction in the automotive field, but there are also many problems in the use process One of the problems is that the internal battery has a low service life and needs to be replaced frequently, and the battery is seriously heated and overcharged, which affects the service life of the battery. The reason is that most of the charging circuits of solar vehicles use constant current. The method of charging is to determine the timing time according to the battery capacity and the charging current, but the capacity of the battery after the user uses it cannot be determined, so it brings an extra burden to the user.

Utility model content

The purpose of this utility model is to provide a solar car charging circuit with simple structure and precise control, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A solar car charging circuit, comprising a solar panel T, a diode D3, a triode V1 and a Schmitt trigger U1, one end of the solar panel T is connected to the cathode of the diode D3, the capacitor C1, the collector of the triode V1 and the inductance L1, The anode of the diode D3 is connected to the other end of the capacitor C1, the capacitor C2, the capacitor C3, the resistor R3, the battery E, the emitter of the triode V2 and the other end of the solar panel T, the emitter of the triode V1 is connected to the other end of the resistor R3, and the triode V1 The base of the diode D1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the cathode of the diode D2, the other end of the capacitor C2 and the positive pole of the storage battery E, the anode of the diode D2 is connected to the other end of the inductor L1 and the collector of the transistor V2, and the transistor V2 The base is connected to resistor R2, the other end of resistor R2 is connected to Schmitt trigger U2, the other end of Schmitt trigger U2 is connected to resistor R1 and Schmitt trigger U1, and the other end of Schmitt trigger U1 is connected to resistor The other end of R1 and the other end of capacitor C3.

As a preferred solution of the present utility model: the solar panel T is a monocrystalline silicon solar panel.

Compared with the prior art, the beneficial effect of the utility model is: the solar car charging circuit of the utility model has a simple structure and few components, and the charging control module is composed of two Schmidt triggers, realizing the overcharging of the car battery Therefore, it has the advantages of low production cost, long service life and stable performance.

Description of drawings

Figure 1 is a circuit diagram of a solar car charging circuit.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, a solar car charging circuit, including a solar panel T, a diode D3, a triode V1 and a Schmitt trigger U1, one end of the solar panel T is connected to the cathode of the diode D3, the capacitor C1, and the collector of the triode V1 Electrode and inductor L1, the anode of diode D3 is connected to the other end of capacitor C1, capacitor C2, capacitor C3, resistor R3, battery E, the emitter of triode V2 and the other end of solar panel T, the emitter of triode V1 is connected to resistor R3 At the other end, the base of the transistor V1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the cathode of the diode D2, the other end of the capacitor C2 and the positive electrode of the storage battery E, and the anode of the diode D2 is connected to the other end of the inductor L1 and the collector of the transistor V2 The electrode, the base of the triode V2 is connected to the resistor R2, the other end of the resistor R2 is connected to the Schmitt trigger U2, the other end of the Schmitt trigger U2 is connected to the resistor R1 and the Schmitt trigger U1, the Schmitt trigger U1 The other end of the resistor R1 is connected to the other end of the capacitor C3.

The solar panel T is a monocrystalline silicon solar panel.

The working principle of the utility model is: the Schmitt trigger U1 in the circuit is used as an oscillator, and the oscillation frequency is determined by the values of R1 and C3. Since the oscillation frequency cannot exceed the maximum value of the ripple frequency on the output capacitor C2, It is required that the oscillation frequency should be lower than 100kHz. U2 acts as a buffer to provide a light constant load on the oscillator output. It acts as an isolation to ensure the frequency stability. The power of IC1 can be directly connected to the rechargeable battery at the output end. V2 acts as a switch to control the charging of the battery by the solar cell. When the buffer U2 outputs a high level, the transistor V2 is turned on, and the collector current passes through the inductor L1 to store magnetic field energy. And establish the reverse voltage VL1, when the buffer U2 outputs low level, the transistor V2 is cut off, the polarity of VL1 is reversed, superimposed with the solar cell voltage, the current flows into the load through the inductor L1 and the diode D1, and the capacitor C2 and the battery E are charged , the output voltage will be higher than the input voltage in steady state, when the transistor V2 is turned on again, the process repeats. A shunt regulator is composed of transistor V1 as the center to prevent battery damage caused by overcharging. And ensure the stability of the output voltage. Once the output voltage rises due to overcharging and exceeds the rated value, the voltage regulator D1 breaks down and the transistor V1 is turned on. The current of the solar cell enters the ground through V1 and the low resistance R3, and the battery does not will overcharge. When the battery voltage is lower than the voltage regulation value, the voltage regulator tube D1 is blocked, V1 is cut off, and the charging process returns to normal.

Claims (2)

1. A solar car charging circuit, comprising a solar panel T, a diode D3, a triode V1 and a Schmitt trigger U1, wherein one end of the solar panel T is connected to the negative electrode of the diode D3, the capacitor C1, and the triode V1 The collector and the inductor L1, the anode of the diode D3 are connected to the other end of the capacitor C1, the capacitor C2, the capacitor C3, the resistor R3, the battery E, the emitter of the triode V2 and the other end of the solar panel T, and the emitter of the triode V1 is connected to the resistor R3 The other end of the transistor V1, the base of the transistor V1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the cathode of the diode D2, the other end of the capacitor C2 and the positive pole of the battery E, and the anode of the diode D2 is connected to the other end of the inductor L1 and the transistor V2 The collector and the base of the transistor V2 are connected to the resistor R2, the other end of the resistor R2 is connected to the Schmitt trigger U2, and the other end of the Schmitt trigger U2 is connected to the resistor R1 and the Schmitt trigger U1, the Schmitt trigger The other end of U1 is connected to the other end of the resistor R1 and the other end of the capacitor C3. 2. A solar car charging circuit according to claim 1, characterized in that the solar panel T is a monocrystalline silicon solar panel.