TWI668937B - Smart charging apparatus - Google Patents

Abstract

The smart charging device of the present invention is used for electrically connecting an electronic device and an external power source. The smart charging device comprises a primary device connection end and a main device connection end, and the secondary device connection end comprises a microcontroller and a current detection device. Test module and a switch line. Among them, the microcontroller stores a current lower limit. In addition, the current detecting module is electrically connected to the microcontroller and the electronic device, and the current detecting module is configured to obtain a current value of the electronic device. In addition, the switch circuit electrically connects the microcontroller and the current detecting module, and the main device connection end electrically connects the external power source and the switch circuit. Wherein, when the current value is less than the current lower limit value, the microcontroller causes the switch circuit to be in a non-conducting state.

Description

Smart charging device

The present invention relates to a smart charging device, and more particularly to a smart charging device having a current detecting module and a control button.

Today, mobile phone holders are accustomed to charging their mobile phones using a charging cable before going to bed until the next day they wake up and remove the charging cable. However, when the battery of the mobile phone reaches 100%, the battery is continuously charged, and the battery will always be in a high voltage state (that is, overcharged), which will consume the chemicals in the battery. As a result, the battery life of the mobile phone is shortened. In addition, when the battery is always overcharged, the mobile phone may also be overheated.

Therefore, how to avoid the battery of the mobile phone or other electronic device that can be charged is in an overcharged state, which is worthy of consideration by those in the field.

It is an object of the present invention to provide a smart charging device that can prevent a mobile phone or other electronic device that can be charged from being in an overcharged state.

The smart charging device of the present invention is used for electrically connecting an electronic device and an external power source. The smart charging device comprises a primary device connection end and a main device connection end, and the secondary device connection end comprises a microcontroller and a current detection device. Test module and a switch line. Among them, the microcontroller stores a current lower limit. In addition, the current detecting module is electrically connected to the microcontroller and the electronic device, and the current detecting module is configured to obtain a current value of the electronic device. In addition, the switch circuit is electrically connected to the microcontroller and the current sense The module is tested, and the main device connection end electrically connects the external power source and the switch line. Wherein, when the current value is less than the current lower limit value, the microcontroller causes the switch circuit to be in a non-conducting state.

In the smart charging device described above, the secondary device connection terminal further includes a USB female socket, and the USB female connector is coupled to the electronic device via a first transmission line.

The smart charging device described above further includes a second transmission line for connecting the electronic device.

In the above-mentioned smart charging device, the current detecting module includes a current detecting unit, an amplifying circuit and a comparing circuit. The current detecting unit is configured to detect a current signal outputted to the electronic device. . In addition, the amplifying circuit is an electrical connection current detecting unit, and the amplifying circuit is configured to strengthen the current signal to form the current value. In addition, the comparison circuit is an electrical connection amplifying circuit, and the comparison circuit is configured to compare the current value with the current lower limit value.

In the smart charging device described above, the current lower limit value is 200 mA.

In the smart charging device described above, the secondary device connection end further includes an LED indicator, the LED indicator is electrically connected to the microcontroller, and the LED indicator is used to emit different color lights; when the current value is When it is less than the current lower limit value, the microcontroller changes the color of the LED indicator.

In the smart charging device described above, the secondary device connection terminal further includes a control button; when the switch circuit is in a non-conducting state, the switch circuit is turned into an on state after the control button is pressed.

The above described features and advantages will be more apparent from the following description.

7‧‧‧Electronic devices

8‧‧‧External power supply

9‧‧‧First transmission line

91‧‧‧USB plug

10, 20‧‧‧Smart charging device

12, 22‧‧‧ device connection

121‧‧‧ Current detection module

1213‧‧‧current detection unit

1214‧‧‧Amplification circuit

1215‧‧‧Comparative circuit

122‧‧‧Microcontroller

123‧‧‧Switching circuit

124‧‧‧LED indicator

125‧‧‧Control button

126‧‧‧USB base

14‧‧‧Master device connection

227‧‧‧second transmission line

FIG. 1A illustrates the smart charging device 10 of the present embodiment connecting the electronic device 7 and the external power source 8 Block diagram.

FIG. 1B is a perspective view of the smart charging device 10.

2A is a perspective view showing the smart charging device 10 connecting the first transmission line 9.

FIG. 2B is a perspective view of the smart charging device 10 connecting the electronic device 7 and the external power source 8.

FIG. 3 is a perspective view of another embodiment of the smart charging device 20.

Referring to FIG. 1A and FIG. 1B , FIG. 1A is a block diagram showing the smart charging device 10 of the present embodiment connecting the electronic device 7 and the external power source 8 , and FIG. 1B is a perspective view of the smart charging device 10 . The smart charging device 10 includes a primary device connection end 12 and a main device connection end 14. The secondary device connection end 12 includes a microcontroller 122, a current detection module 121, an LED indicator 124, and a switch line 123. A control button 125 and a USB socket 126, the LED indicator 124, the control button 125 and the USB socket 126 are located outside the secondary device connection end 12, and the current detection module 121, the LED indicator 124 and the switch line 123 It is placed inside the secondary device connection terminal 12. The microcontroller 122 is electrically connected to the current detecting module 121, the LED indicator 124 and the switch line 123, and the microcontroller 122 stores a current lower limit value, and the current lower limit value is usually set to 200 mA. In the above, the current lower limit value is set to 200 mA. However, those of ordinary skill in the art will recognize that the current lower limit can also be 100 mA, 50 mA or 10 mA. In other words, this embodiment does not forcibly limit the range of the current lower limit value.

2A and FIG. 2B, FIG. 2A is a perspective view showing the smart charging device 10 connected to the first transmission line 9, and FIG. 2B is a perspective view of the smart charging device 10 connecting the electronic device 7 and the external power source 8. . The USB socket 126 is connected to the electronic device 7 via an external first transmission line 9. The USB plug 91 of the first transmission line 9 is embedded in the USB socket 126, so that the power of the external power source 8 can be transmitted to the electronic device through the first transmission line 9. 7.

In addition, the current detecting module 121 is electrically connected to the electronic device 7 (the electronic device 7 is, for example, a mobile phone, a tablet computer or a notebook computer), and the current detecting module 121 is mainly used to obtain a current of the electronic device 7. value. In detail, the current detecting module 121 includes a current detecting unit 1213, an amplifying circuit 1214 and a comparing circuit 1215. The amplifying circuit 1214 is electrically connected between the current detecting unit 1213 and the comparing circuit 1215. The current detecting unit 1213 is configured to detect a current signal outputted to the electronic device 7. However, usually the current signal is not strong enough, so the current signal is further amplified by the amplifying circuit 1214 to form the current value. Thereafter, the comparison circuit 1215 compares the current value with the current lower limit value in the microcontroller 122 to determine whether the current value is less than the current lower limit value.

In addition, referring again to FIG. 1A , the switch line 123 is electrically connected to the current detecting module 121 and the main device connecting end 14 , and the main device connecting end 14 is electrically connected to the external power source 8 , and the current of the external power source 8 can pass through the main device. The connection terminal 14, the switch line 123, the current detecting module 121, and the secondary device connecting end 12 are conducted to the electronic device 7 to charge the battery in the electronic device 7. When the battery of the electronic device 7 is nearly full, the current value of the secondary device connection end 12 transmitted to the electronic device 7 will gradually become smaller, so the current value obtained by the current detecting module 121 will be less than 200 mA (the lower limit of current) value). Moreover, when the current value is less than the current lower limit value, the microcontroller 122 will put the switch line 123 into a non-conducting state. Therefore, the current of the external power source 8 cannot be transmitted to the electronic device 7. In this way, when the battery of the mobile phone reaches 100%, the smart charging device 10 stops supplying power to the battery of the mobile phone, so that the battery does not overcharge. Because of this, the smart charging device 10 can also indirectly prevent the mobile phone from overheating.

In the above, the LED indicator 124 is used to emit different color lights. For example, please refer to FIG. 2B again. When the smart charging device 10 starts to connect the electronic device 7 with the external power source 8 (the external power source 8 is supplied with one source). In the case of the notebook computer, the LED indicator 124 emits red light, and the switch line 123 at this time is in a non-conducting state, so the electronic device 7 has not received the power transmitted from the smart charging device 10. Then, when the control button 125 is pressed, the LED indicator 124 emits green light, and the switch line 123 at this time is turned into a conductive state, and the electronic device 7 starts to receive the smart charging device 10 . The power transmitted. In addition, when the current value is less than the current lower limit value (when the battery of the electronic device 7 is near full charge), the microcontroller 122 turns the color light of the LED indicator 124 back to red light.

Please refer to FIG. 3. FIG. 3 is a perspective view of the smart charging device 20 of another embodiment. The difference between the smart charging device 20 and the smart charging device 10 is that the secondary device connection end 22 of the smart charging device 20 further includes a second transmission line 227, and the smart charging device 20 does not have the USB female socket 126. Further, the second transmission line 227 is for connecting the electronic device 7. In this way, the smart charging device 20 can transmit power to the electronic device 7 without using an external transmission line. In summary, the smart charging device of the embodiment can avoid overcharging of a mobile phone or other electronic device that can be charged, and can indirectly avoid overheating of a mobile phone or other electronic device that can be charged. Therefore, the smart charging device 10 can be connected to the mobile phone for a long time.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (6)

A smart charging device for electrically connecting an electronic device and an external power source, the smart charging device comprising: a primary device connection end, comprising: a microcontroller, storing a current lower limit value; a USB female seat, The USB bus is connected to the electronic device via a first transmission line; a current detecting module is electrically connected to the microcontroller and the electronic device, and the current detecting module is configured to obtain a current value of the electronic device; And a switch circuit electrically connecting the microcontroller and the current detecting module; and a main device connecting end electrically connecting the external power source and the switch circuit; wherein, when the current value is less than the current lower limit value At the time, the microcontroller puts the switch line in a non-conducting state. A smart charging device for electrically connecting an electronic device and an external power source, the smart charging device comprising: a primary device connection end, comprising: a microcontroller, storing a current lower limit value; and a second transmission line, The second conductive line is used to connect the electronic device; a current detecting module is electrically connected to the microcontroller and the electronic device, and the current detecting module is configured to obtain a current value of the electronic device; and a switching circuit electrically connecting the microcontroller and the current detecting module; and a main device connecting end electrically connecting the external power source and the switch circuit; Wherein, when the current value is less than the current lower limit value, the microcontroller causes the switch circuit to be in a non-conducting state. The smart charging device of claim 1 or 2, wherein the current detecting module comprises: a current detecting unit for detecting a current signal outputted to the electronic device; a circuit electrically connecting the current detecting unit, wherein the amplifying circuit is configured to strengthen the current signal to form the current value; and a comparing circuit electrically connecting the amplifying circuit, and the comparing circuit is configured to compare the current Value and the current lower limit. The smart charging device according to claim 1 or 2, wherein the current lower limit value is 200 mA. The smart charging device according to the first or the second aspect of the invention, wherein the device connection end further comprises an LED indicator, the LED indicator is electrically connected to the microcontroller, and the LED indicator is used To emit different color lights; when the current value is less than the current lower limit value, the microcontroller changes the color light of the LED indicator. The smart charging device according to claim 1 or 2, wherein the secondary device connection end further comprises a control button; when the switch circuit is in a non-conducting state, the switch is pressed after the control button is pressed The line changes to a conducting state.