CN202495797U

CN202495797U - Solar weak light charging circuit

Info

Publication number: CN202495797U
Application number: CN2012201246791U
Authority: CN
Inventors: 刘维敏
Original assignee: DONGGUAN RUIMING ELECTRONIC TECHNOLOGY CO LTD
Current assignee: DONGGUAN RUIMING ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2012-03-29
Filing date: 2012-03-29
Publication date: 2012-10-17
Anticipated expiration: 2022-03-29

Abstract

The utility model relates to the field of solar energy, and is particularly suitable for solar energy charging applications. The main problem to be solved is to provide a simple circuit so that the solar charger can work normally under weak light conditions. It includes a solar cell, a voltage detection unit, a capacity detection unit, a direct charging unit and a rechargeable battery. The solar cell is connected to the direct charging unit, and also includes a boost unit and a low-voltage power storage unit. The voltage detection unit includes a voltage sampling module. The voltage detection unit, the capacity detection unit, the low-voltage power storage unit and the boost unit are connected in sequence; the direct charging unit is connected in parallel with the low-voltage power storage unit and the boost unit connected in series, and is connected to the rechargeable battery. Connecting a weak light charging circuit to the original solar charging circuit can make the solar charger work normally under weak light conditions, so as to effectively improve the charging capacity of the solar panel to the battery.

Description

Solar energy low light level charging circuit

Technical field

The utility model relates to field of solar energy, especially is suitable for the application of solar recharging.

Background technology

The conventional solar cells plate usually can only the absorption portion solar spectrum; And usually only when absorbing the sunlight of direct projection operating efficiency higher; Therefore a lot of solar energy equipments all are equipped with automatic adjustment system; To guarantee that solar panel keeps helping most endergonic angle with the sun all the time, because the voltage that solar panels produce when the low light level is lower, rechargeable battery can't directly store the energy of solar panels output.In common family expenses charger, use such automatic adjustment system cost high, and manufacturing process is complicated.

The utility model content

The problem that the utility model will solve provides a kind of simple circuit, makes solar charger ability operate as normal under the low light condition.

The utility model is realized through following technical scheme:

Solar energy low light level charging circuit; Comprise solar battery sheet, voltage detection unit, capacity check unit, directly fill unit and rechargeable battery; Said solar battery sheet with directly fill the unit and be connected; Also comprise boosting unit, low-voltage electric weight memory cell, said voltage detection unit comprises the voltage sampling module, and described voltage detection unit, capacity check unit, low-voltage electric weight memory cell are connected with boosting unit successively; Said directly to fill the unit parallelly connected with the low-voltage electric weight memory cell and the boosting unit that are connected in series, and be connected with rechargeable battery.

Further, said voltage detection unit and capacity check unit comprise pull-up resistor, pull down resistor, electric capacity and metal-oxide-semiconductor, are responsible for obtaining of low voltage value.Said low-voltage electric weight memory cell comprises polar capacitor and resistance, is responsible for the storage of electric weight.Said boosting unit comprises an IC and peripheral circuit, is responsible for the electric weight in the electric capacity is boosted and exports battery to.

The utility model circuit that only an external low light level is handled on original charging circuit; Just can overcome solar energy can not be to the deficiency of battery charge when the low light level; Depress the effect that also can store electric weight in different electric through electric capacity; When the electric weight of electric capacity storage reaches set point, to battery charge, can obtain good charge efficiency through boosting mode.

Description of drawings

Fig. 1 is the circuit diagram of the utility model;

Fig. 2 is the block diagram of the utility model.

A, solar battery sheet; B, voltage detection unit; C, capacity check unit; D, low-voltage electric weight memory cell; E, rechargeable battery; F, directly fill the unit.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

Solar energy low light level charging circuit like Fig. 1 and shown in Figure 2, comprises solar battery sheet A, voltage detection unit B, capacity check unit C, low-voltage electric weight memory cell D, boosting unit E, directly fills unit (F) and rechargeable battery G.BT1 is the external solar interface, and wherein R4, R6, C2, Q2 constitute solar voltage detecting unit B circuit, and described solar voltage detecting unit (B) is connected with the positive pole of solar battery sheet A; R1, EC1 are low-voltage electric weight memory cell D, and also the positive pole with solar battery sheet A is connected, and L1, D2, EC2, U1, R3, C1 constitute the boosting unit list; When solar voltage detecting unit B detects low-voltage; Low-voltage electric weight memory cell D is storing electricity constantly, after reaching certain voltage, just can charge to rechargeable battery G; D1 is said solar energy direct charging battery G path; When voltage ratio is bigger, need not start low-voltage electric weight memory cell D, just can directly charge to rechargeable battery G through BT2.

Fig. 2 is the preferred embodiment of the utility model.

The solar energy interface BT1 provide power supply, and R4, R6 be to the BT1 voltage sampling, when BT1 voltage is higher than sampling value, BT1 through D1 to battery charge; When BT1 voltage is lower than sampling value; R8, R5 take a sample to the capacity of electric capacity EC1; A high level was exported in the Q1 conducting when electric weight that stores as EC1 was higher than R8, R5 sampling value, U1, L1, the D2 work of boosting, and the EC1 electric weight deposits in to battery; When the EC1 electric weight is lower than R8, R5 sampling value, boosting quits work, and waits for that BT1 charges to EC1 through R1.

Describe the specific embodiment of the utility model above in detail.But the execution mode that should be appreciated that the utility model is not limited in the foregoing description, and the description of the foregoing description only is used to help to understand this novel spirit.Under this novel spirit that discloses,, all fall in this novel scope these novel various variant of doing.

Claims

1. The solar weak light charging circuit includes a solar cell (A), a voltage detection unit (B), a capacity detection unit (C), a direct charging unit (F) and a rechargeable battery (E), and the solar cell (A) ) is connected with the direct charging unit (F), and also includes a boost unit (E), a low-voltage power storage unit (D), and the voltage detection unit (B) includes a voltage sampling module, and the voltage detection unit (B) , a capacity detection unit (C), a low-voltage power storage unit (D) and a boost unit (E) are sequentially connected, and the direct charge unit (F) is connected in series with the low-voltage power storage unit (D) and the boost unit (E) connected in parallel and connected to the rechargeable battery (E).

2. The solar weak light charging circuit according to claim 1, characterized in that, the voltage detection unit (B) and the capacity detection unit (C) include resistors, capacitors and field effect transistors.

3. The solar weak light charging circuit according to claim 1, characterized in that, the low-voltage power storage unit (D) includes a polar capacitor and a resistor.

4. The solar weak light charging circuit according to claim 1, characterized in that, the boost unit (E) comprises an IC and peripheral circuits.