12V lead-acid battery solar MPPT charging system

Abstract

The utility model discloses a 12V lead-acid battery solar MPPT charging system which is arranged between a lead-acid battery and a solar panel and comprises an MUC main control chip, a power supply module connected with the MUC main control chip, an overvoltage protection circuit and a charging and discharging current detection circuit which are connected with the MUC main control chip, and a temperature control circuit and a 5V output circuit which are connected with the MUC main control chip. The control end of the input step-down circuit is connected with the MUC main control chip; the 5V output circuit is connected with the lead-acid battery; and the input step-down circuit is connected between the solar panel and the lead-acid battery. According to the utility model, the structure arrangement is reasonable, the overvoltage protection can be realized, the charge and discharge battery detection can be realized, the stability and effectiveness of the overvoltage protection can be improved, the MCU main control chip is used for controlling, the control precision is improved, the temperature control effect can be improved by matching with the temperature control circuit, and the applicability is strong.

Description

TECHNICAL FIELD

[0001] The utility model belongs to solar charging technical field, concretely relates to a 12V lead acid battery solar MPPT charging system. BACKGROUND

[0002] Solar energy is a common renewable energy, is widely used in street lamp or domestic lighting system, small 12V solar energy and lead acid battery cooperation can realize the stable lighting of lamps and lanterns, in order to guarantee its use stability and reliability, it generally will the corresponding MPPT charging system, the prior art lead acid battery solar charging system not only circuit structure is very complex, and the function is limited, thereby difficult to guarantee the effectiveness and stability of charging, the applicability is limited. SUMMARY

[0003] The utility model discloses a kind of 12V lead acid battery solar MPPT charging systems with reasonable structure setting and improve use stability.

[0004] The technical scheme for achieving the utility model is a kind of 12V lead acid battery solar MPPT charging system, is arranged between lead acid battery and solar panel, including MUC main control chip, the power supply module being connected with the MUC main control chip, the overvoltage protection circuit and the charge-discharge current detection circuit being connected with the MUC main control chip, the temperature control circuit and the 5V output circuit being connected with the MUC main control chip, the input step-down circuit being connected with the MUC main control chip at control end;

[0005] The 5V output circuit is connected with the lead acid battery;

[0006] The input step-down circuit is connected between solar panel and lead acid battery.

[0007] Further preferably, it further includes the function button circuit and display circuit being connected with the MUC main control chip.

[0008] Further preferably, the overvoltage protection circuit includes overvoltage protection chip, forty-ninth resistor, twenty-seventh capacitor, twenty-sixth capacitor, forty-first resistor and forty-seventh resistor;

[0009] The forty-ninth resistor is connected on the first pin of overvoltage protection chip and the other end is connected on the pin of MUC main control chip;

[0010] The fourth resistance is connected between the third pin of the overvoltage protection chip and the positive electrode of the lead-acid battery, the forty-seventh resistance is connected between the third pin of the overvoltage protection chip and the ground wire, and the twenty-sixth capacitor is connected between VCC and the ground wire, the VCC pin of the overvoltage protection chip is connected with VCC, and the twenty-seventh capacitor is connected between the first pin and the second pin of the overvoltage protection chip and the second pin is grounded.

[0011] Further preferably, the model of the overvoltage protection chip is LTC6001UXT5.

[0012] The utility model has positive effect: the utility model discloses the structure is reasonable, and it can not only realize overvoltage protection, but also can realize the detection of charge-discharge battery, can improve the stability and effectiveness of overvoltage protection, and control through MUC master chip, improve the control precision, and cooperate temperature control circuit, can also improve temperature control effect, and suitability is strong. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to make the content of the utility model more easily be clearly understood, the utility model is further detailed below according to specific embodiments and combining with the drawings, wherein:

[0014] Fig. 1 It is the specific schematic diagram of MUC master chip, function button circuit and display circuit of the utility model;

[0015] Fig. 2 It is the specific structure schematic diagram of input step-down circuit in the utility model;

[0016] Fig. 3 It is the specific structure schematic diagram of power supply module and charge-discharge current detection circuit in the utility model;

[0017] Fig. 4 It is the specific structure schematic diagram of 5V output circuit and overvoltage protection circuit and temperature control circuit in the utility model.

[0018] Reference signs: MUC master chip 1, power supply module 2, overvoltage protection circuit 3, charge-discharge current detection circuit 4, temperature control circuit 5, 5V output circuit 6, input step-down circuit 7, function button circuit 8, display circuit 9. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. Embodiment

[0020] See Figs. 1 to 4 As shown in the solar MPPT charging system of 12V lead-acid battery, which is arranged between the lead-acid battery and the solar panel, including MUC master chip 1, the power supply module 2 connected with the MUC master chip, the overvoltage protection circuit 3 and the charge-discharge current detection circuit 4 connected with the MUC master chip, the temperature control circuit 5 and the 5V output circuit 6 connected with the MUC master chip, the input voltage reduction circuit 7 connected with the MUC master chip; in connection, the 5V output circuit is connected with the lead-acid battery; the input voltage reduction circuit is connected between the solar panel and the lead-acid battery. It can realize the detection of charge-discharge current through MUC master chip, and realize overvoltage protection and input voltage reduction control, and also can realize temperature control adjustment, to ensure the use stability of the overall structure.

[0021] Moreover, in the actual application, it also includes the function button circuit 8 and the display circuit 9 connected with the MUC master chip. The function button adjustment operation and display operation can be realized, and the use convenience and intuitiveness are improved.

[0022] In the actual application, the overvoltage protection circuit includes overvoltage protection chip U1, forty-ninth resistor R49, twenty-seventh capacitor C27, twenty-sixth capacitor C26, forty-first resistor R41 and forty-seventh resistor R47; in connection, the forty-ninth resistor is connected to the first pin of the overvoltage protection chip and the other end is connected to the pin of the MUC master chip; the forty-first resistor is connected between the third pin of the overvoltage protection chip and the positive electrode of the lead-acid battery, the forty-seventh resistor is connected between the third pin of the overvoltage protection chip and the ground wire, and the twenty-sixth capacitor is connected between VCC and ground wire, the VCC pin of the overvoltage protection chip is connected with VCC, and the twenty-seventh capacitor is connected between the first pin and the second pin of the overvoltage protection chip and the second pin is grounded. And the model of the overvoltage protection chip is LTC6001UXT5. The effectiveness and stability of overvoltage protection can be ensured.

[0023] The utility model has the positive effect: the structure of the utility model is reasonable, it can not only realize overvoltage protection, but also can realize charge-discharge battery detection, can improve the stability and effectiveness of overvoltage protection, and control through MUC master chip, improve the control precision, and cooperate temperature control circuit, can also improve the temperature control effect, and the applicability is strong.

[0024] The standard parts used in the embodiment can be directly purchased from the market, and the non-standard structural parts according to the description in the specification can also be directly processed without doubt according to the existing technical knowledge, meanwhile, the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology, so the specific description is not made here.

[0025] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation to the embodiments of the utility model. For the ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The changes or variations extended from the essential spirit of the utility model and obvious to the skilled in the art still belong to the protection scope of the utility model.

Claims

1. A 12V lead acid battery solar MPPT charging system, provided between a lead acid battery and a solar panel, characterized in that: The application relates to a MUC master control chip, a power supply module connected with the MUC master control chip, an overvoltage protection circuit and a charge-discharge current detection circuit connected with the MUC master control chip, a temperature control circuit and a 5V output circuit connected with the MUC master control chip, an input voltage reduction circuit with a control end connected with the MUC master control chip, and a lead-acid battery. The 5V output circuit is connected with the lead-acid battery. The input voltage reduction circuit is connected between a solar panel and the lead-acid battery.

2. A 12V lead-acid battery solar MPPT charging system as claimed in claim 1, wherein: The application further comprises a function button circuit and a display circuit connected with the MUC master control chip.

3. A 12V lead-acid battery solar MPPT charging system as claimed in claim 1, wherein: The overvoltage protection circuit comprises an overvoltage protection chip, a forty-ninth resistor, a twenty-seventh capacitor, a twenty-sixth capacitor, a forty-first resistor and a forty-seventh resistor. The forty-ninth resistor is connected at a first pin of the overvoltage protection chip and connected at another end with a pin of the MUC master control chip. The forty-first resistor is connected between a third pin of the overvoltage protection chip and a positive electrode of the lead-acid battery, the forty-seventh resistor is connected between the third pin of the overvoltage protection chip and a ground wire, the twenty-sixth capacitor is connected between VCC and the ground wire, a VCC pin of the overvoltage protection chip is connected with VCC, and the twenty-seventh capacitor is connected between the first pin and the second pin of the overvoltage protection chip and the second pin is connected with the ground wire.

4. A 12V lead-acid battery solar MPPT charging system as claimed in claim 3, characterized in that: The overvoltage protection chip is of the model LTC6001UXT5.

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