CN201893587U - Solar charging electrical appliance for nickel-hydrogen charging battery or lithium battery - Google Patents

Abstract

A solar charging appliance for nickel-metal hydride rechargeable battery or lithium battery, relates to a charging appliance, including an electrical appliance casing and a circuit board arranged in the casing, a circuit and a solar battery panel, and the circuit board is provided with D1, NiMH battery solar panel charging circuit composed of BT; backup charging circuit composed of R1, DS1, D2, BT; lithium battery charging circuit composed of R4, C1, C2, MAX1811; solar panel consists of four pieces with an area of 6cm ×6cm silicon solar panels, four solar panels are connected in parallel and then connected in series. The utility model uses a solar battery panel to charge a nickel-metal hydride battery or a lithium battery through a charging circuit, and can automatically stop charging after the charging of the battery is completed. The utility model has flexible use, low cost and good practicability.

Description

A kind of solar charging electric appliance for Ni-MH rechargeable battery or lithium battery

technical field

The utility model relates to a charging electric appliance, in particular to a solar charging electric appliance used for nickel-hydrogen rechargeable batteries and lithium batteries.

Background technique

When the user of a small electrical appliance goes out, the battery suddenly runs out of power, because the charger is not around or there is no place to charge it, which will affect the normal use of the electrical appliance. Especially in the wild, it is difficult to solve without a power supply.

Contents of the invention

The purpose of the utility model is to provide a charging appliance with solar energy or direct current power supply charging. Using solar panels or DC power as the power supply, the charging appliance uses the circuit board circuit and the solar panel to form a whole to achieve the purpose of solar charging.

The purpose of this utility model is achieved by the following technical solutions:

A solar charging appliance for nickel-metal hydride rechargeable batteries or lithium batteries, including an electrical appliance housing and a circuit board arranged in the housing, a circuit and a solar battery panel, and the circuit board is provided with a nickel-metal hydride battery composed of D1 and BT Solar panel charging circuit; backup charging circuit composed of R1, DS1, D2, BT; lithium battery charging circuit composed of R4, C1, C2, MAX1811; solar panel consists of four silicon solar cells with an area of 6cm×6cm The four solar panels are connected in parallel and then connected in series.

In the solar charging appliance for nickel-hydrogen rechargeable batteries or lithium batteries, the terminals 1 and 2 of the solar panel circuit are respectively connected to the terminals 3 and 5 in the charging circuit.

In the solar charger for Ni-MH rechargeable battery or lithium battery, the housing is provided with a spare external DC power charging interface.

Advantage and effect of the present utility model are:

1. The utility model consists of a circuit board circuit and a solar battery panel, which can realize the function of solar charging. The utility model has flexible use, low cost and good practicability.

2. The utility model uses a solar battery panel to charge a Ni-MH battery or a lithium battery through a charging circuit, and can automatically stop charging after the battery is fully charged.

3. In addition to the solar charging method, the utility model also designs a spare external DC power charging interface in case of emergency.

Description of drawings

Fig. 1 is the schematic diagram of the utility model solar battery panel circuit;

Fig. 2 is a schematic diagram of the charging circuit of the utility model.

Detailed ways

The utility model is described in detail below with reference to accompanying drawing.

The circuit board of the utility model is provided with a Ni-MH battery charging circuit composed of D1 and BT, and the solar panel charges the Ni-MH battery BT through the diode D1; a backup charging circuit composed of R1, DS1, D2, and BT, and an external DC power supply Charge the Ni-MH battery BT through R1, DS1, and D2. When S1 is closed, the solar panel can directly provide power for the charging circuit of the lithium battery at the back. When there is no solar panel, BT can also provide power for the charging circuit at the back. When there is no solar panel and BT, an external DC power supply can be directly used for the back. The charging circuit provides power. There is a lithium battery charging circuit with MAX1811 as the core that can provide a charging voltage of up to 4.2V on the circuit board. The switch S2 connected between pins 4 and 8 of the MAX1811 is disconnected, and the charging current of the circuit is 100mA; when S2 is closed, the charging current of the circuit is 500mA. When pin 1 of MAX1811 is connected as shown in the figure, the maximum charging voltage is 4.2V; when pin 1 is connected to the negative terminal of the power supply, the maximum charging voltage is 4.1V. Once the highest charging voltage is reached, the charging current will decrease sharply and keep the highest charging voltage unchanged. In the figure, R2 and DS2 connected between pins 4 and 3 of MAX1811 are used as a power indicator, and the DS2 light indicates that the power is turned on. R3 and DS3 connected between pins 4 and 8 of MAX1811 are used as a charging indicator. The DS3 light is on to indicate that it is charging, and the light is off to indicate that the charging is complete. Terminals 6 and 7 connected between pins 5 and 6 of MAX1811 provide charging voltage for the lithium battery.

In the solar panel circuit diagram, it consists of four silicon solar panels with an area of 6cm×6cm. Each solar panel has a no-load output voltage of 4V. When the operating current is 40mA, the output voltage is 3V. Four solar panels are connected two by two in parallel and then connected in series. Terminals 1 and 2 provide 6V voltage for the following circuit. In application, terminals 1 and 2 are respectively connected to terminals 3 and 5 in the charging circuit diagram.

In the charging circuit diagram, the Ni-MH battery charging circuit composed of D1 and BT, as long as the light intensity reaches a certain level, the solar panel will charge the Ni-MH battery BT through diode D1 until it is saturated. The external DC power supply is connected to the backup charging circuit composed of R1, DS1, D2, and BT through terminals 4 and 5. R1 uses a resistor with a power of 1W. When R1 is 20 ohms, the best external charging voltage is 6-8 Volts, DS1 is the external charging indicator light, and the DS1 light indicates that the external DC power supply is being used.

In the charging circuit diagram, when S1 is closed, the solar panel can directly provide power for the lithium battery charging circuit at the back. When there is no solar panel, BT can also provide power for the rear charging circuit. When there is no solar panel and BT, it can be used directly. The -8 volt external DC power supply provides power for the charging circuit behind.

The lithium battery charging circuit based on MAX1811 can provide the highest charging voltage of 4.2V. The switch S2 connected between pins 4 and 8 of the MAX1811 determines the charging current. The charging current of this circuit has two options: 100mA (when the switch S2 is open in the figure) and 500mA (when the switch S2 is closed in the figure). When pin 1 of MAX1811 is connected as shown in the figure, the maximum charging voltage is 4.2V; when pin 1 is connected to the negative terminal of the power supply, the maximum charging voltage is 4.1V. Once the highest charging voltage is reached, the charging current will decrease sharply and keep the highest charging voltage unchanged. In the figure, R2 and DS2 connected between pins 4 and 3 of MAX1811 are used as a power indicator, and the DS2 light indicates that the power is turned on. R3 and DS3 connected between pins 4 and 8 of MAX1811 are used as a charging indicator. The DS3 light is on to indicate that it is charging, and the light is off to indicate that the charging is complete. Terminals 6 and 7 connected between pins 5 and 6 of MAX1811 provide charging voltage for the lithium battery.

Claims (3)

1. A solar charging electrical appliance for nickel-metal hydride rechargeable battery or lithium battery, comprising an electrical appliance housing and a circuit board, a circuit and a solar panel configured on the housing, characterized in that the circuit board is provided with D1, NiMH battery solar panel charging circuit composed of BT; standby charging circuit composed of R1, DS1, D2, BT; lithium battery charging circuit composed of R4, C1, C2, MAX1811; solar panel consists of four pieces with an area of 6cm ×6cm silicon solar panels, four solar panels are connected in parallel and then connected in series. 2. A kind of solar charging electrical appliance for Ni-MH rechargeable battery or lithium battery according to claim 1, characterized in that, said solar panel circuit terminals 1 and 2 are respectively connected to terminals 3 and 5 in the charging circuit . 3. A solar charging electrical appliance for Ni-MH rechargeable batteries or lithium batteries according to claim 1, characterized in that, the housing is provided with a spare external DC power charging interface.

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