WO2009094906A1

WO2009094906A1 - Multifunctional lithium battery solar energy charger

Info

Publication number: WO2009094906A1
Application number: PCT/CN2009/000124
Authority: WO
Inventors: Zhitao Chen
Original assignee: Zhitao Chen
Priority date: 2008-01-07
Filing date: 2009-02-03
Publication date: 2009-08-06
Also published as: CN201142352Y

Abstract

A multifunctional lithium battery solar energy charger includes a shell (1). The shell (1) is a cuboid flat box whose front face is equipped with a solar energy plate (6) and whose rear face is equipped with an alternating current movable plug (10). The alternating current movable plug (10) is articulated with the shell (1). The alternating current movable plug (10) can be pressed into a plug groove (8), and it can be popped up when it is used. The rear face is further equipped with a lithium battery box cover (7), the lithium battery can be replaced when the box cover (7) is opened. One side surface of the shell (1) is equipped with an interface (2), a switch (3), a charge state indicating lamp (4) and an electrical energy reserves indication (5). There is an electronic circuit board in the shell (1). Additionally, the shell (1) is equipped with various adapter heads.

Description

Multifunctional lithium battery solar charger

Technical field

The present invention relates to the field of apparatus for directly converting chemical energy into electrical energy, and more particularly to an apparatus for maintaining a secondary battery by solar energy charging. Background technique

Mobile phones, digital cameras and other digital electronic products are equipped with a charger. When the power is insufficient, it needs to be charged in time. Generally, the charger is directly connected to the mains to take power, but under certain conditions, it cannot be connected with the mains. In order to solve this problem, China's invention patent has disclosed a "solar charger for mobile phones", patent number 99202995. 3, which is composed of two plates pivoted together with one side of the pivoting seat, in another One side is provided with a buckle seat that can be fastened or separated from each other, and a solar charging plate is arranged on the opposite inner side of each plate body, and a wire is connected by an internal conversion circuit, and the connector at the other end of the wire can be connected with the mobile phone. The socket is plugged in and has a cable management area setting; the solution only proposes the shape and connection of the charger, and has a single function, which cannot be taken from the mains, and the user also needs to bring an ordinary AC charger. Summary of the invention

The object of the present invention is to address the above-mentioned deficiencies of the prior art, to provide a charging at any time under illumination, and also to be plugged into a mains power socket for charging; a plurality of adapters are provided to adapt to various interfaces, and the multifunctional lithium is convenient to use. Battery solar charger.

In order to achieve the above object, the technical solution of the present invention is as follows: a multifunctional lithium battery solar charger, the outer shape of the casing is a rectangular parallelepiped box, the volume is small, the front side is provided with a solar panel, and the back side is provided with an alternating current movable plug, the movable plug Hinged to the housing, it can be pressed into the plug slot and popped out when used; there is also a lithium battery cover on the back, and the lithium battery can be replaced by opening the cover; on one side, there are interfaces, switches, charging status indicators and electric energy Reserve indication; electronic circuit board inside the housing; also equipped with a variety of adapters.

Due to the adoption of the above technical solution, the multifunctional lithium battery solar charger of the present invention can be fully charged by alternating current or solar radiation, and when charging, digital electronic products such as mobile phones and digital cameras are charged, and only need to be carried. The charger is ready for use; it is equipped with a variety of adapters, which can be adapted to various electrical appliances of different interfaces, and only one charger of the present invention can replace all the chargers of the 3. 6V DC power supply products.

1

Confirmation It is small in size and easy to use. DRAWINGS

The invention will now be further described with reference to the accompanying drawings and embodiments.

Figure 1 is a schematic view of the structure of the present invention.

Figure 2 is a schematic rear view of Figure 1.

Figure 3 is a pop-up state diagram of the movable plug of the component 10 of Figure 2.

Figure 4 is a circuit schematic of the present invention.

In the figure: 1, housing, 2, interface, 3, switch, 4, charging status indicator, 5, energy reserve indication, 6, solar panel, 7, lithium battery compartment cover, 8, plug slot, 9, plug out Controller, 10, active plug. detailed description

1 to 3, a multifunctional lithium battery solar charger of the present invention has a casing 1 having a rectangular parallelepiped casing shape, a small size, a solar panel 6 on the front side, and an alternating current movable plug 10 on the back side. The movable plug is hinged to the housing and can be pressed into the plug slot 8, and is controlled to be ejected by the plug ejection controller 9 when used; the lithium battery cover 7 is also provided on the back surface, and the lithium battery is replaced by opening the cover; There are respectively interface 2, switch 3, charging status indicator 4 and electric energy reserve indication 5; an electronic circuit board is arranged in the housing; and a plurality of adapters are provided;

The plurality of adapters are plugs that are connected to the charger at one end and to the charging interfaces of various digital electronic products at the other end;

As shown in Figure 4, the circuit principle in the electronic circuit board is as follows:

The control circuit of the multi-function lithium battery solar charger is mainly composed of AC 220V mains conversion circuit, built-in energy storage lithium battery charging control and protection circuit, external charging control and protection circuit; among them, AC 220V mains control conversion circuit, The AC220V mains is rectified and capacitor C through the diode VD _{l 7} , filtered, and then stepped down by the resistor and R ₅ to form a DC voltage on the Zener diode ZD, which is supplied to the main winding of the high frequency transformer T and the LC oscillation. Circuit; through the field effect transistor 0, after the conduction, the forward oscillation occurs, and the induced voltage is generated on the third and fourth ends of the feedback winding of the high-frequency transformer T, and the acceleration capacitor C ₄ and the resistor R _{7 are applied} to the transistor Q ₂ . On the base, the triode is turned off, and the triode <3⁄4 is rapidly saturated and turned on; Due to the clamping action of the Zener diode ZD ₂ , the capacitor C ₆ discharges to the feedback coil, generating a reverse oscillation, which is repeated; the induced voltage generated at the 5th and 6th ends of the secondary winding of the transformer T is rectified by the diode D ₇ , and the capacitor C ₈ After filtering, a stable DC voltage is generated on the Zener diode ZD ₃ for charging the buried battery. At the same time, the voltage is compared with the reference voltage source composed of the precision voltage regulator IC ₄ through the resistor R _l2 feedback to control the photoelectric failure. U, the conduction or not; by changing the resistance of the resistor R ₁₆ can adjust the regulation value of IC ₄ to achieve the purpose of adjusting the DC voltage on ZD ₃ ;

In the built-in energy storage lithium battery charging control and protection circuit, when the charging control switch 3, that is, SW, is turned off, the base of the charging control transistor Q ₃ is high, Q _{3 is} not turned on, and the lithium battery is dedicated for charging. Manager IC ₂ and PM0S tube Q _{8 have} no voltage input, do not work, can not charge the built-in lithium battery; When switch 3, ie ≤ \ ^ is closed, switch transistor Q _{3 is} turned on, charging manager IC ₂ works, its The 5th pin of the driving end drives the PM0S tube Q ₈ gate 4th pin, Q _{8 is} turned on; the mains passes through the voltage conversion circuit, and the solar power source passes through the D ₈ and is buried through the transistor Q ₃ , the PMOS transistor Q _s , and the diode _3⁄4 Battery charging, IC ₂ 's 1st pin is low level, internal charging indicator 4, ie LED, red light is on, IC ₂ 's 1st pin is high impedance after charging is completed, LED, red light off, IC ₂ The seventh pin is low level, the internal charging indicator 4, that is, the LED J recording light is on, the diode D ₉ acts as a reverse cut-off; the voltage across the lithium battery is connected to the voltage detecting end of the charging manager IC ₂ via the resistor R _M 4 feet, according to the level of the voltage across the battery, charge manager determines state of charge IC _2: pre Power, constant current charging, constant voltage charging; monitor IC ₂ using the internal temperature of the thermistor and the second resistor R ₂₆ pin external lithium battery, the battery temperature control within a range set by the user, the charging IC manager ₂ also has better short circuit protection and internal resistance compensation function;

In the external charging of said control and protection circuit, when the switch 3, i.e. ^ 3 is disconnected, the control gate of PMOS transistor Q ₉ 4 feet of no voltage ₉₉ is not turned on, the built-in rechargeable lithium battery can not be made . When there is mains or solar power input, the charging status indicator 4, that is, the LED ₂ green light is on, the DC voltage is passed through the diode D, ₂ , the resistor R ₃₉ to the USB interface 2, the external digital product is charged, and the transistor Q _{7 is} turned on. The charging status indicator 4, that is, the LED ₂ red light is on, after the digital product is fully charged, Q _{7 is} turned off, the LED _{2 is} turned off, and the green light is on. The transistor <3⁄4 base is added with a voltage of about 4. IV, Q _{4 is} turned off, the voltage on the resistor R ₂₉ is 0, and the first pin of the step-up DC/DC converter IC ₃ is low, and IC _{3 is} turned off. The booster circuit does not work; when there is no mains or solar power input, if the switch is closed, the 4th pin of the PM0S tube is gated from the built-in lithium battery via the inductor L ₃ , diode D„, resistor R ₃₄ , R ₃₅ Voltage, Q ₉ turn-on, step-up DC/DC converter IC ₃ uses adaptive current mode PWM control loop, due to Q ₄ turn-on, converter The first leg of IC ₃ starts from the high level on R ₂₉ ; the external current 匪OS tube Q _{5 is} expanded, so that the maximum current can reach 300 mA when the lithium battery is externally charged, and the voltage is changed at 2.75V- 4. 2V. After the IC _{3 is} boosted, the USB output can be stabilized in the range of 5. 6V- 5. 8V. The lithium battery voltage is output from the USB interface through the inductor L ₃ , the transistor D„, the NM0S tube Q ₉ , and the resistor R _39. The product is charged, Q _{7 is} turned on when charging, LED _{2 is} red, and after Q _{7 is} turned off, LED _{2 is} lit green.

Claims

Rights request

1. A multifunctional lithium battery solar charger having a casing (1), characterized in that: the casing has a rectangular parallelepiped shape and is compact in size, with a solar panel (6) on the front and an AC movable plug on the back (10). The activity plug is hinged to the housing and has a plug slot (8); a lithium battery cover (7) is also provided on the back side, and the lithium battery is replaced by opening the cover; respectively, on the top side of the housing (1) It has interface (2), switch (3), charging status indicator (4) and power reserve indicator (5); electronic circuit board is provided in the housing; and a variety of adapters are also available.

2. A multi-function lithium battery solar charger according to claim 1, wherein the circuit principle in the electronic circuit board is controlled by an AC 220V mains conversion circuit, and a built-in energy storage lithium battery charging control. And the protection circuit, the external charging control and the protection circuit are composed of three parts; in the AC 220V mains control conversion circuit, the AC220V mains is rectified by the diode and the capacitor (after filtering, and then the current limiting by the resistors R ₄ and R _{5 )} And the Zener is respectively supplied to the main winding of the high-frequency transformer T and the LC oscillating circuit; the induced voltage is generated at the third and fourth ends of the feedback winding of the high-frequency transformer T, and is applied to the transistor Q through the accelerating capacitor C ₄ and the resistor R ₇ _On the base of ₂ ; the induced voltage generated at the 5th and 6th ends of the secondary winding of the transformer T is rectified by the diode D ₇ , and the capacitor (: _{8 is} filtered, a stable DC voltage is generated on the Zener diode ZD ₃ , and lithium is supplied. Battery charging;

The built-in energy storage lithium battery charging control and protection circuit is composed of a switching transistor Q ₃ , a charging manager IC ₂ , a PM0S transistor _3⁄4 , a diode D ₉ , a resistor R ₂₄ , a resistor R ₂₆ , a resistor R ₁₇ , and a resistor R ₂₃ . The collector of the triode controls the charging manager IC ₂ via the resistor Rn and the resistor R ₂₃ , the fifth pin of the IC ₂ drives the pin 4 of the PM 0S transistor Q ₈ , and the output of the pin 5 of the Q _{8 is} charged by the diode D ₉ to the built-in buried battery. ;

The external charging control and protection circuit is composed of a triode Q ₄ , a triode Q ₇ , a boost converter IC ₃ , a PM0S transistor _3⁄4 , an inductor L ₃ , a diode D _u , an NM0S transistor _3⁄4 , a current spreading resistor R ₂₉ , R ₃₉ composition; wherein the built-in buried battery power is boosted by the inductor L ₃ , IC ₃ , after the Q _{5 is} expanded, the diode D„, the PM0S tube 3⁄4, the resistor R _{M is} output to the USB interface 2; for the mains or solar power input , and then output to the USB interface 2 via the diode D _l2 and the resistor R ₃₉ .