CN203827039U - Novel power-saving mobile phone charger - Google Patents

Abstract

The utility model provides a novel power-saving mobile phone charger, which relates to the technical field of chargers. It includes a casing (9) and a charging circuit inside the casing (9), wherein the charging circuit also includes a power interface (1a, 1b), a transformer (21), a rectifier circuit (22), an electromagnetic control circuit (3), A charging interface (8), a first voltage sampling circuit (6), a second voltage sampling circuit (7), a main control chip (4) and a display circuit (5). The utility model has low cost and wide application range, can intelligently charge the battery of the mobile phone, and avoids overcharging and insufficient charging of the battery of the mobile phone.

Description

A new battery-saving mobile phone charger

technical field

The utility model relates to the technical field of chargers, in particular to a novel power-saving mobile phone charger.

Background technique

Most of the existing mobile phone chargers use AC/DC voltage conversion technology to generate DC power that meets the power supply requirements of mobile phone lithium batteries through voltage changes to charge the mobile phone battery to realize the conversion process from electrical energy to chemical energy. In the current use situation, mobile phone chargers have been widely used in every household, but ordinary mobile phone chargers do not have power-saving functions and cannot judge the charging status of mobile phones. They can only charge the mobile phone battery continuously. A charging method is not conducive to the use of mobile phone batteries and also causes great waste, especially at present, mobile phone charging is generally carried out at night, and the charging process generally only takes 3 to 4 hours, resulting in a waste of electric energy and a great loss of mobile phone batteries. Large, and prone to safety accidents such as mobile phone battery explosion. Therefore, it is of great significance to improve the mobile phone charger and realize a certain degree of intelligent charging.

Contents of the invention

The content of the utility model is to provide a novel power-saving mobile phone charger, which can overcome some or some defects of the prior art.

According to a novel power-saving mobile phone charger of the present invention, it includes a casing and a charging circuit located inside the casing, wherein the charging circuit also includes a power interface for connecting to a 220V AC power supply; a transformer whose high-voltage side is connected to the power supply Interface connection; rectifier circuit, its input end is connected to the low-voltage side of the transformer, and its output end outputs 5V DC voltage; the electromagnetic control circuit includes a relay, and one end of a pair of contacts of the relay is connected to the output end of the rectifier circuit, so The other end of the pair of contacts is connected with a detection resistor R, which controls the on and off of the pair of contacts by controlling the power-on and power-off of the control coil of the relay; the charging interface, which is connected to the detection resistor R connection, used for the access of the mobile phone charging line; the first voltage sampling circuit, which is connected to the charging interface, and converts the sampled mobile phone battery voltage U1 into a digital signal; the second voltage sampling circuit, which is connected to the current output plate , and convert the voltage U2 at the sampled current output plate into a digital signal; the main control chip, whose VCC terminal is connected to the output terminal of the rectifier circuit, receives the digital signal from the first voltage sampling circuit and the second voltage sampling circuit , and send a control signal to the relay.

Preferably, the charging circuit can also include a display circuit, which includes an LED driver chip and an LED display screen, wherein the LED display screen is connected to the main control chip through the LED driver chip for displaying charging information, and the VCC terminal of the LED driver chip is connected to the rectifier The output terminal of the circuit is connected.

Preferably, the electromagnetic control circuit can also include a current input pole plate, a current output pole plate, an electromagnet and a permanent magnet, the current input pole plate is connected to the output end of the rectifier circuit, and the current output pole plate is connected to the detection resistor R; The iron and the permanent magnet are fixed in the shell parallel to each other, the current input pole plate is configured to slide between the electromagnet and the permanent magnet, and the current output pole plate is fixed on the permanent magnet; the electromagnet passes through the pair of relays. The contact is connected to the output end of the rectifier circuit, and the contact and separation of the current input plate and the current output plate are controlled by controlling the on and off of the pair of contacts.

A new energy-saving mobile phone charger of the utility model uses a main control chip and a voltage sampling circuit connected with the main control chip to sample and detect the voltage at the charging output terminal of the mobile phone, and the main control chip uses a known calculation program to collect Calculate the received voltage data and judge whether the battery of the mobile phone is full. If it is full, the main control chip sends a control signal to the electromagnetic control circuit to cut off the charging circuit of the mobile phone. At the same time, the main control chip sends the battery power information to the display circuit and displays it on the LED display. Displayed, so that the user can know the charging status of the mobile phone at any time, and stop charging when the battery is fully charged, realizing the design goal of saving power and reducing consumption, realizing the intelligent charging of the mobile phone battery, and improving the power utilization rate.

Preferably, the housing includes a curved front panel and a plate-shaped back panel, the front panel and the back panel configure the outer shape of the housing into a hemispherical shape, and the charging circuit is arranged in the cavity surrounded by the front panel and the back panel; There are two plugs for connecting to the power interface, and a platform is recessed in the middle of the front panel for placing the LED display; the junction of the front panel and the back panel is provided with an opening for placing the charging interface.

Preferably, an antistatic treatment layer is provided on both the current input plate and the current output plate.

Preferably, the charging interface adopts a USB standard output port.

Preferably, the first voltage sampling circuit includes an AD voltage sampling module LM358 and an AD sampling data conversion chip, the AD voltage sampling module LM358 collects the cell phone battery voltage U1, and the AD sampling data conversion chip converts U1 into a digital quantity and sends it to the main control chip.

Preferably, the second voltage sampling circuit includes an AD voltage sampling module LM358 and an AD sampling data conversion chip, the AD voltage sampling module LM358 collects the voltage at the current output plate, and the AD sampling data conversion chip converts U2 into a digital quantity and sends it to the main control chip.

Preferably, the main control chip adopts a single-chip microcomputer.

The utility model is a novel power-saving mobile phone charger, which adopts USB standard output port as charging interface, and the charging voltage is 5V/1A output voltage and current, which conforms to the charger standard of most mobile phones on the market at present, and has better Compatibility can be widely used and promoted. The utility model relates to a new power-saving mobile phone charger, which is designed with a display circuit, which can display the battery power in real time, so that the user can know the charging situation at any time, and avoids shortening the service life of the battery due to insufficient charging of the mobile phone.

Description of drawings

Fig. 1 is the charging circuit circuit diagram of a kind of novel power-saving mobile phone charger in embodiment 1;

Fig. 2 is the appearance schematic diagram of a kind of novel power-saving mobile phone charger in embodiment 1;

Fig. 3 is the charging status schematic diagram of a kind of novel power-saving mobile phone charger in embodiment 1;

FIG. 4 is a schematic diagram of a power-off state of a novel power-saving mobile phone charger in Embodiment 1. FIG.

The names of the parts indicated by the numbers in the drawings are as follows: 1a—power interface, 1b—power interface, 21—transformer, 22—rectifier circuit, 3—electromagnetic control circuit, 31—current input plate, 32—current output Pole plate, 33—electromagnet, 34—relay, 35—permanent magnet, 4—main control chip, 5—display circuit, 51—LED driver chip, 52—LED display (52), 6—first voltage sampling circuit , 7—second voltage sampling circuit, 8—charging interface, 9—shell.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Example 1

As shown in Fig. 1 and Fig. 2, it is a new type of power-saving mobile phone charger of the present embodiment, which includes a shell 9 and a charging circuit located inside the shell 9, wherein the charging circuit also includes a power interface 1a, 1b for use In access to 220V AC power supply; Transformer 21, its high voltage side is connected to power supply interface 1a, 1b; Rectifier circuit 22, its input end is connected to the low voltage side of transformer 21, and its output end outputs 5V DC voltage; It also includes a current input pole plate 31, a current output pole plate 32, an electromagnet 33, a relay 34 and a permanent magnet 35, wherein the electromagnet 33 and the permanent magnet 35 are fixed in the shell 9 parallel to each other, and the current input pole plate 31 is structured as Can slide between the gap between the electromagnet 33 and the permanent magnet 35, the current output pole plate 32 is fixed on the permanent magnet 35, the electromagnet 33 is connected to the output end of the rectifier circuit 22 through a pair of contacts on the relay 34, and the relay 34 passes Control the on and off of the electromagnet 33 so as to control the contact and separation of the current input pole plate 31 and the current output pole plate 32; the charging interface 8 is connected to the current output pole plate 32 through a detection resistor R, and is used to connect to the mobile phone for charging line; the first voltage sampling circuit 6, which is connected with the charging interface, and converts the sampled mobile phone battery voltage U1 into a digital signal; the second voltage sampling circuit 7, which is connected with the current output plate 32, and the sampled current output The voltage U2 at the pole plate 32 is converted into a digital signal; the main control chip 4, whose VCC end is connected with the output end of the rectifier circuit 22, receives the digital signal from the first voltage sampling circuit 6 and the second voltage sampling circuit 7, and A control signal is sent to the relay 34 .

In addition, the display circuit 5 also includes an LED driver chip 51 and an LED display 52, wherein the LED display 52 is connected to the main control chip 4 through the LED driver chip 51 for displaying charging information, and the VCC terminal of the LED driver chip 51 It is connected with the output end of the rectification circuit 22 .

In this implementation, the shell 9 is made of epoxy resin, which has anti-static protection and anti-electric shock functions and is unique in shape and adopts a semi-circular arc design for easy access. The shell 9 includes an arc-shaped front panel and a plate-shaped back panel, and the front panel and the back panel make the outer shape of the shell 9 into a hemispherical shape, and the charging circuit is arranged in the cavity surrounded by the front panel and the back panel; the back panel is provided with two plugs for connecting the power interface 1a, 1b, and the middle part of the front panel A platform is recessed inward for placing the LED display 52 ; an opening for placing the charging interface 8 is provided at the junction of the front panel and the back panel. Both the current input pole plate 31 and the current output pole plate 32 are provided with an antistatic treatment layer. The charging interface 8 adopts a USB standard output port. The first voltage sampling circuit 6 includes an AD voltage sampling module LM358 and an AD sampling data conversion chip. The AD voltage sampling module LM358 collects the battery voltage U1 of the mobile phone, and the AD sampling data conversion chip converts U1 into a digital value and sends it to the main control chip 4 . The second voltage sampling circuit 7 includes an AD voltage sampling module LM358 and an AD sampling data conversion chip, the AD voltage sampling module LM358 collects the voltage at the current output plate 32, and the AD sampling data conversion chip converts U2 into a digital quantity and sends it to the main control chip 4. The main control chip 4 adopts a single-chip microcomputer.

When the new power-saving mobile phone charger of this embodiment is in the charging state, the power supply interfaces 1a and 1b are connected to a 220V AC power supply, and after being rectified by the transformer 21 and the rectifier circuit 22, the output is a 5V/1A direct current, which provides the single-chip microcomputer chip Operating Voltage. At this time, the first voltage sampling circuit 6 and the second voltage sampling circuit 7 are respectively connected to the two ends of the detection resistor R, the first voltage sampling circuit 6 collects the battery voltage U1 of the mobile phone, and the second voltage sampling circuit 7 collects the current output plate The voltages U2, U1 and U2 at 32 are processed by the AD sampling data conversion chip into digital quantities and then sent to the main control chip 4 . The main control chip 4 obtains the charging current I according to the detection resistors R, U1, and U2, wherein, I=(U2-U1)/R. According to the charging principle, the battery voltage of the mobile phone gradually increases with the charging process. When the battery is fully charged, the voltage difference between the two ends of the detection resistor R is extremely small, that is, the charging current I flowing through the detection resistor R is extremely small. In this embodiment, when the charging current I is set to be less than or equal to 0.01A, the mobile phone is fully charged. As shown in Figure 3, when the charging current I does not reach 0.01A, the main control chip 4 controls the relay 34 to keep it in a power-off state, so that the coil of the electromagnet 33 is powered off, and the current input pole plate 31 is in the position of the permanent magnet 35. Under the action of magnetism, it is in reliable contact with the current output pole plate 32 to maintain the charging state. At the same time, the main control chip 4 displays the value of U1/U2 on the LED display 52 through the LED driver chip 51. When the value is 0, it indicates that the battery power of the mobile phone is 0. When the value is 1, it indicates that the battery is fully charged. Before this value reaches 1, the color of the LED display 52 displays green, indicating that charging is in progress; when this value reaches 1, the color of the LED display 52 displays red, indicating that the charging is complete.

When the charging of a new type of power-saving mobile phone charger of the present embodiment is completed, as shown in Figure 4, when the charging current I did not reach 0.01A, the main control chip 4 controlled the relay 34 to keep it in an electrified state, so that the electromagnetic The iron 33 coil is energized, and the current input pole plate 31 is attracted by the electromagnet 33, so that the current input pole plate 31 is separated from the current output pole plate 32, and the charging state ends.

When the LED display 52 shows that the mobile phone is full of electricity, when the user can pull out the battery of the mobile phone and disconnect the connection between a new power-saving mobile phone charger of the present embodiment and the power supply, the electromagnet 33 and the main control chip 4 are all out of power. At this time, the current input pole plate 31 and the current output pole plate 32 are in reliable contact again under the action of the permanent magnet 35, preparing for the next charging process.

In a word, the above descriptions are only preferred embodiments of the present utility model, and all equal changes and modifications made according to the patent scope of the utility model should fall within the scope of the utility model patent.

Claims (9)

1. a novel power saving charger for mobile phone, comprises shell (9) and is located at the inner charging circuit of shell (9), it is characterized in that: charging circuit also comprises power interface (1a, 1b), for accessing 220V AC power; Transformer (21), its high-pressure side is connected with power interface (1a, 1b); Rectification circuit (22), the low-pressure side of its input access transformer (21), its output output 5V direct voltage; Electromagnetic control circuit (3), it comprises a relay (34), the output of one end access rectification circuit (22) of the pair of contact of relay (34), the other end of described pair of contact is connected with a detection resistance R, by control relay (34) thus control coil electric and dead electricity be controlled turning on and off of described pair of contact; Charging inlet (8), it is connected with described detection resistance R, for the access of mobile phone charging wire; The first voltage sampling circuit (6), it is connected with charging inlet, and the battery of mobile phone voltage U1 of sampling is converted to digital signal; Second voltage sample circuit (7), it is connected with electric current output pole plate (32), and the voltage U 2 that the electric current output pole plate (32) of sampling is located is converted to digital signal; And main control chip (4), its VCC end is connected with the output of rectification circuit (22), receives the digital signal that the first voltage sampling circuit (6) and second voltage sample circuit (7) transmit, and transmits control signal to relay (34).

2. a kind of novel power saving charger for mobile phone according to claim 1, it is characterized in that: charging circuit also comprises display circuit (5), display circuit (5) comprises that LED drives chip (51) and LED display (52), wherein, LED display (52) drives chip (51) to be connected with main control chip (4) by LED, be used for showing charge information, LED drives the VCC end of chip (51) to be connected with the output of rectification circuit (22).

3. a kind of novel power saving charger for mobile phone according to claim 1 and 2, it is characterized in that: electromagnetic control circuit (3) also comprises electric current input pole plate (31), electric current output pole plate (32), electromagnet (33) and permanent magnet (35), electric current input pole plate (31) is connected with the output of rectification circuit (22), and electric current output pole plate (32) is connected with described detection resistance R; Electromagnet (33) and being fixed in shell (9) that permanent magnet (35) is parallel to each other, electric current input pole plate (31) is constructed to be permeable to slide between the gap of electromagnet (33) and permanent magnet (35), and electric current output pole plate (32) is fixed on permanent magnet (35); Electromagnet (33) is by the output of the described pair of contact access rectification circuit (22) on relay (34), thereby controls electric current input pole plate (31) and electric current and export the contact of pole plate (32), separate by controlling turning on and off of described pair of contact.

4. a kind of novel power saving charger for mobile phone according to claim 2, it is characterized in that: shell (9) comprises the front plate of arc and the backplate of plate shape, front plate and backplate are configured to the profile of shell (9) hemispherical, and charging circuit is arranged in the cavity that front plate and backplate surround; Backplate is provided with two latches for connecting power interface (1a, 1b), caves in to the inside and a platform for placing LED display (52) in the middle part of front plate; The junction of front plate and backplate is provided with the opening for placing charging inlet (8).

5. a kind of novel power saving charger for mobile phone according to claim 3, is characterized in that: on electric current input pole plate (31) and electric current output pole plate (32), be equipped with antistatic processing layer.

6. a kind of novel power saving charger for mobile phone according to claim 1, is characterized in that: charging inlet (8) adopts USB standard output port.

7. a kind of novel power saving charger for mobile phone according to claim 1, it is characterized in that: the first voltage sampling circuit (6) comprises AD voltage sample module LM358 and AD sampled data conversion chip, AD voltage sample module LM358 gathers battery of mobile phone voltage U1, and AD sampled data conversion chip is converted to digital quantity by U1 and sends to main control chip (4).

8. a kind of novel power saving charger for mobile phone according to claim 1, it is characterized in that: second voltage sample circuit (7) comprises AD voltage sample module LM358 and AD sampled data conversion chip, AD voltage sample module LM358 gathers the voltage that electric current output pole plate (32) is located, and AD sampled data conversion chip is converted to digital quantity by U2 and sends to main control chip (4).

9. a kind of novel power saving charger for mobile phone according to claim 1, is characterized in that: main control chip (4) adopts single-chip microcomputer.