CN201918756U

CN201918756U - Solar charge and discharge controller

Info

Publication number: CN201918756U
Application number: CN2010206867296U
Authority: CN
Inventors: 陈波; 程家阳; 陆忠芳; 贾灵; 王薪宇; 郑淑军; 刘福芹; 张亚平; 姜姗; 蔡盛贵
Original assignee: LIERDA SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: Lierda Science & Technology Group Co., Ltd.
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2011-08-03
Anticipated expiration: 2020-12-29

Abstract

The utility model discloses a solar charge and discharge controller, which is characterized by comprising a single chip microcomputer (4). The single chip microcomputer (4) is respectively connected with a voltage measuring circuit (1), a current measuring circuit (2), a temperature measuring circuit (3), a charge control circuit (5), a discharge control circuit (6) and a state indicating circuit (7). The solar charge and discharge controller can improve solar charge efficiency and has a temperature compensation function and various safety protection functions.

Description

A kind of solar charging/discharging controller

Technical field

The utility model patent relates to a kind of controller, relates in particular to a kind of controller of controlling solar charging/discharging.

Background technology

Mainly form from the net solar electric power supply system by solar panel, solar charging/discharging controller, storage battery, power consumption equipment, wherein the solar charging/discharging controller is part and parcel in the net solar electric power supply system, is used to control solar cell to the charging of storage battery with to the power supply of power consumption equipment.But not only charge efficiency is low for the general at present solar charging/discharging controller that adopts, and does not have temperature compensation function, lacks safety protection function.

The utility model content

The purpose of this utility model is, a kind of solar charging/discharging controller is provided.It can improve the solar charging electrical efficiency, and has temperature compensation function and multiple safety protection function.

The technical solution of the utility model: a kind of solar charging/discharging controller, it is characterized in that: comprise single-chip microcomputer, single-chip microcomputer links to each other with tension measuring circuit, current measurement circuit, temperature measuring circuit, charging control circuit, charge/discharge control circuit and condition indication circuit respectively.

In the aforesaid solar charging/discharging controller, described charging control circuit comprises the mos field effect transistor that is connected in the charge circuit, mos field effect transistor links to each other with triode, triode links to each other with single-chip microcomputer, mos field effect transistor adopts two differential concatenation structures, guarantees minimum forward conduction voltage and good reverse cutoff performance.。

In the aforesaid solar charging/discharging controller, described charge/discharge control circuit comprises the mos field effect transistor that is connected in the discharge loop, mos field effect transistor links to each other with triode, triode links to each other with single-chip microcomputer, thereby the Single-chip Controlling triode is controlled the open and-shut mode of mos field effect transistor indirectly.

In the aforesaid solar charging/discharging controller, described single-chip microcomputer is the MSP430 single-chip microcomputer.

Compared with prior art; single-chip microcomputer of the present utility model records voltage by the external voltage measuring circuit; record electric current by current measurement; by the external temperature measuring circuit measures ambient temperature that has temperature sensor; the utility model is controlled charging process according to temperature and voltage; the electric current that records by the single-chip microcomputer analysis; voltage and temperature are used charging control circuit; charge/discharge control circuit and condition indication circuit are realized the reverse connection of accumulator defencive function; solar panel reverse connecting protection function; short-circuit protection function; the load overcurrent protection function; cross cold; overheat protective function.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the circuit theory diagrams of charging control circuit of the present utility model;

Fig. 3 is the circuit theory diagrams of charge/discharge control circuit of the present utility model.

Being labeled as in the accompanying drawing: 1-tension measuring circuit, 2-current measurement circuit, 3-temperature survey electricity, 4-single-chip microcomputer, 5-charging control circuit, 6-charge/discharge control circuit, 7-condition indication circuit.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described, but not as the foundation to the utility model restriction.

Embodiment.A kind of solar charging/discharging controller as shown in Figure 1, comprises single-chip microcomputer 4, and single-chip microcomputer 4 links to each other with tension measuring circuit 1, current measurement circuit 2, temperature measuring circuit 3, charging control circuit 5, charge/discharge control circuit 6 and condition indication circuit 7 respectively.Described charging control circuit 5 as shown in Figure 2, comprise the mos field effect transistor that is connected in the charge circuit, mos field effect transistor links to each other with triode, triode links to each other with single-chip microcomputer 4, two differential concatenations of mos field effect transistor.Described charge/discharge control circuit 6 comprises the mos field effect transistor that is connected in the discharge loop as shown in Figure 3, and mos field effect transistor links to each other with triode, and triode links to each other with single-chip microcomputer 4.

Single-chip microcomputer 4 records voltage by tension measuring circuit 1; record temperature by temperature measuring circuit 2; single-chip microcomputer is controlled charging control circuit through a kind of algorithm according to voltage that records and temperature; can realize reverse connection of accumulator defencive function and solar panel reverse connecting protection function by circuit of the present utility model; single-chip microcomputer 4 records electric current by current measurement circuit; single-chip microcomputer detects current value at any time; when current value that short circuit or overcurrent cause occurring and surpass threshold value, single-chip microcomputer 4 just disconnects discharge loops by control charge/discharge control circuit 6.Single-chip microcomputer 4 records temperature by the temperature measuring circuit 2 that is connected with it, and when temperature too high (greater than 70 ℃) or low excessively (being lower than subzero 30 ℃), single-chip microcomputer is just by control charge/discharge control circuit disconnected 6 open electric loops.Charge/discharge control circuit 6 is realized by triode and mos field effect transistor, the pin of single-chip microcomputer 4 is connected to triode and controls closing and opening of triode, triode is connected to and controls closing and opening of mos field effect transistor, mos field effect transistor is series at discharge loop, thus the through and off of control discharge process.

The state of the condition indication circuit 7 indication the utility model controllers that are connected with single-chip microcomputer 4, the state of indication has charged state indication, load condition indication, mistake to indicate unusually.Tension measuring circuit 1 measuring voltage that is connected with single-chip microcomputer, single-chip microcomputer be by judging to the processing of magnitude of voltage whether solar panel and storage battery are connected on the controller, and advance 7 row indications by condition indication circuit; Current measurement circuit 2 that is connected with single-chip microcomputer and temperature measuring circuit 3 are measured electric current and temperature, and single-chip microcomputer judges whether to open load by the processing to current value and temperature value, and indicates by condition indication circuit 7; Single-chip microcomputer 4 has judged whether unusually by parameters such as processes voltage, electric current, temperature, and has indicated by condition indication circuit 7.

Concrete charging circuit is specifically implemented circuit theory diagrams as shown in Figure 2, the Single-chip Controlling port is through current-limiting resistance R1 oxide-semiconductor control transistors (triode) T1 completion logic translation function, T1 is through current-limiting resistance R2 oxide-semiconductor control transistors (triode) T2, and T2 and R3, R4 cooperate the control of finishing mos field effect transistor T4 and T5.Voltage-stabiliser tube D4 prevents too high control voltage infringement mos field effect transistor T4 and T5 as voltage clamp function.

Concrete discharge circuit is specifically implemented circuit theory diagrams as shown in Figure 3, and the Single-chip Controlling port is finished the level conversion function through current-limiting resistance R5 oxide-semiconductor control transistors (triode) T6, and T6 finishes the control to mos field effect transistor T7.Voltage-stabiliser tube D8 prevents too high control voltage infringement mos field effect transistor T7 as voltage clamp function.

Claims

1. solar charging/discharging controller, it is characterized in that: comprise single-chip microcomputer (4), single-chip microcomputer (4) links to each other with tension measuring circuit (1), current measurement circuit (2), temperature measuring circuit (3), charging control circuit (5), charge/discharge control circuit (6) and condition indication circuit (7) respectively.

2. solar charging/discharging controller according to claim 1, it is characterized in that: described charging control circuit (5) comprises the mos field effect transistor that is connected in the charge circuit, mos field effect transistor links to each other with triode, triode links to each other with single-chip microcomputer (4), two differential concatenations of mos field effect transistor.

3. solar charging/discharging controller according to claim 1, it is characterized in that: described charge/discharge control circuit (6) comprises the mos field effect transistor that is connected in the discharge loop, mos field effect transistor links to each other with triode, and triode links to each other with single-chip microcomputer (4).

4. solar charging/discharging controller according to claim 1 is characterized in that: described single-chip microcomputer (4) is the MSP430 single-chip microcomputer.