CN205015459U - Charging current detection device based on USB charging wire - Google Patents
Charging current detection device based on USB charging wire Download PDFInfo
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- CN205015459U CN205015459U CN201520605345.XU CN201520605345U CN205015459U CN 205015459 U CN205015459 U CN 205015459U CN 201520605345 U CN201520605345 U CN 201520605345U CN 205015459 U CN205015459 U CN 205015459U
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- charging wire
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Abstract
The utility model belongs to the field of charging discloses a charging current detection device based on USB charging wire, concatenates on the earth connection of USB charging wire to be connected with the power cord of USB charging wire, including control module, indicating module and sampling module, the voltage of sampling unit on to the sampling resistor is sampled and is generated sample voltage, and the control unit generates a control voltage and the 2nd control voltage according to sample voltage, and indicating units carries out the charging current condition indication according to a control voltage and the 2nd control voltage. The utility model discloses a charging current detection device based on USB charging wire has realized that the charged state is instructed and provides the light source for using night.
Description
Technical field
The utility model relates to charging field, particularly a kind of charging current pick-up unit based on USB charging wire.
Background technology
The principle of the USB charging wire charged for mobile phone in current market, USB charging wire connects mobile phone and charger, as shown in Figure 1.
The defect of prior art is: when charging the phone, and can not see mobile phone whether full charging a long way off timely, and the mobile phone that needs to unblank checks whether electricity is charged to 100%; When black night evening time, when holding a USB data line to mobile phone plan charging, mobile phone charge port can accurately be inserted into the very first time.Both of these case causes certain not convenient and puzzlement to user.
Utility model content
The utility model provides a kind of charging current pick-up unit based on USB charging wire, is intended to solve existing design and can not indicates mobile phone whether full charging and the technical matters that do not have light source to use for night.
The utility model realizes like this, a kind of charging current pick-up unit based on USB charging wire, the described charging current pick-up unit based on USB charging wire is serially connected on the ground wire of USB charging wire, and be connected with the power lead of described USB charging wire, the described charging current pick-up unit based on USB charging wire comprises control module, indicating module and sampling module;
The mobile phone terminal of the ground wire of the first input end of described control module and the output terminal of described sampling module and USB charging wire is connected, first output terminal of described control module is connected with the first input end of described indicating module, second output terminal of described control module is connected with the second input end of described indicating module, and the second input end of described control module is connected with the power lead of the 3rd input end of described indicating module and USB charging wire;
Described sampling unit is sampled to the voltage on sampling resistor and is generated sampled voltage, described control module generates the first control voltage and the second control voltage according to described sampled voltage, and described indicating member carries out current state of charge instruction according to described first control voltage and described second control voltage.
The beneficial effect that the technical scheme that the utility model provides is brought is:
From above-mentioned the utility model, owing to being serially connected on the ground wire of USB charging wire, and be connected with the power lead of USB charging wire, comprise control module, indicating module and sampling module; Sampling unit is sampled to the voltage on sampling resistor and is generated sampled voltage, control module generates the first control voltage and the second control voltage according to sampled voltage, and indicating member carries out current state of charge instruction according to the first control voltage and the second control voltage; Therefore, achieve charged state instruction and provide light source for night uses.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the function structure chart of prior art;
The function structure chart of the charging current pick-up unit based on USB charging wire that Fig. 2 provides for the utility model embodiment;
The exemplary circuit structural drawing of the charging current pick-up unit based on USB charging wire that Fig. 3 provides for the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
The utility model embodiment provides a kind of structure of the charging current pick-up unit based on USB charging wire, as shown in Figure 2, charging current pick-up unit 01 based on USB charging wire is serially connected on the ground wire of USB charging wire, and be connected with the power lead of USB charging wire, the charging current pick-up unit 01 based on USB charging wire comprises control module 011, indicating module 012 and sampling module 013.
Mobile phone 03 end of the ground wire of the first input end of control module 011 and the output terminal of sampling module 03 and USB charging wire is connected, first output terminal of control module 011 is connected with the first input end of indicating module 012, second output terminal of control module 011 is connected with the second input end of indicating module 012, and the second input end of control module 011 is connected with the power lead of the 3rd input end of indicating module 012 and USB charging wire.
Voltage on sampling unit 013 pair of sampling resistor is sampled and generates sampled voltage, control module 011 generates the first control voltage and the second control voltage according to sampled voltage, and indicating member 012 carries out current state of charge instruction according to the first control voltage and the second control voltage.
As shown in Figure 3, control module 011 comprises dual operational amplifier U1, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1 and the second electric capacity C2.
The first output terminal OUTA of dual operational amplifier U1, the first end of the first resistance R1 and second inverting input of dual operational amplifier U1
for the first output terminal of control module, first inverting input of dual operational amplifier U1
be the first input end of control module with the first end of the first electric capacity C1, the first normal phase input end A of dual operational amplifier U1 and second end of the first resistance R1, second end of the second resistance R2 and the first end of the 3rd resistance R3 connect, the power end VDD of dual operational amplifier U1, the first end of the second electric capacity C2, second end of the second resistance R2 and the first end of the 5th resistance R5 are the second input end of control module, the second output terminal OUTB of dual operational amplifier U1 is the second output terminal of control module, second normal phase input end of dual operational amplifier U1 is connected with second end of the first end of the 4th resistance R4 and the 5th resistance R5, second end of the 3rd resistance R3, second end of the first electric capacity C1, the negative electricity source VSS of dual operational amplifier U1, the earth terminal GND of dual operational amplifier U1, second end of the second electric capacity C2 and second end of the 4th resistance R4 are connected to power supply ground altogether.
In concrete enforcement, the model of dual operational amplifier U1 can be LM358.
As shown in Figure 3, indicating module 012 comprises the first LED 1, second LED 2, the 6th resistance R6 and the 7th resistance R7.
First negative pole end of the first LED 1 and the first negative pole end of the second LED 2 are the first input end of indicating module, second negative pole end of the first LED 1 and the second negative pole end of the second LED 2 are the second input end of indicating module, first positive terminal of the first LED 1 is connected with the first end of the 6th resistance R6 with the second positive terminal of the first LED 1, first positive terminal of the second LED 2 is connected with the first end of the 7th resistance R7 with the second positive terminal of the second LED 2, second end of the 6th resistance R6 and second end of the 7th resistance R7 are the 3rd input end of indicating module.
As shown in Figure 3, sampling module 013 is the 8th resistance R8.
The first end of the 8th resistance R8 is the output terminal of sampling module, and second end of the 8th resistance R8 is connected to power supply ground.
In concrete enforcement, when mobile phone charges, because have electric current from the 8th resistance R8 process, so the first inverting input of dual operational amplifier
input high level, first output terminal output low level of dual operational amplifier, the first end (can be red light) of the first light emitting diode and first end (the can be red light) conducting of the second light emitting diode, and the second inverting input of now dual operational amplifier
for low level, therefore the second output terminal of dual operational amplifier exports high level, and second end (can be blue lamp) of the first light emitting diode and second end (can be blue lamp) of the second light emitting diode are not opened; When mobile phone full charging, because there is no electric current from the 8th resistance R8 process, so the first inverting input of dual operational amplifier
input low level, first output terminal of dual operational amplifier exports high level, the first end (can be red light) of the first light emitting diode and the first end (can be red light) of the second light emitting diode are not opened, and the second inverting input of now dual operational amplifier
for high level, therefore the second output terminal output low level of dual operational amplifier, second end (can be blue lamp) of the first light emitting diode and the second end (the can be blue lamp) conducting of the second light emitting diode.
In sum, the utility model embodiment by being serially connected on the ground wire of USB charging wire, and is connected with the power lead of USB charging wire, comprises control module, indicating module and sampling module; Sampling unit is sampled to the voltage on sampling resistor and is generated sampled voltage, control module generates the first control voltage and the second control voltage according to sampled voltage, and indicating member carries out current state of charge instruction according to the first control voltage and the second control voltage; Therefore, achieve charged state instruction and provide light source for night uses.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. the charging current pick-up unit based on USB charging wire, it is characterized in that, the described charging current pick-up unit based on USB charging wire is serially connected on the ground wire of USB charging wire, and be connected with the power lead of described USB charging wire, the described charging current pick-up unit based on USB charging wire comprises control module, indicating module and sampling module;
The mobile phone terminal of the ground wire of the first input end of described control module and the output terminal of described sampling module and USB charging wire is connected, first output terminal of described control module is connected with the first input end of described indicating module, second output terminal of described control module is connected with the second input end of described indicating module, and the second input end of described control module is connected with the power lead of the 3rd input end of described indicating module and USB charging wire;
Described sampling unit is sampled to the voltage on sampling resistor and is generated sampled voltage, described control module generates the first control voltage and the second control voltage according to described sampled voltage, and described indicating member carries out current state of charge instruction according to described first control voltage and described second control voltage.
2. as claimed in claim 1 based on the charging current pick-up unit of USB charging wire, it is characterized in that, described control module comprises dual operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first electric capacity and the second electric capacity;
First output terminal of described dual operational amplifier, the first end of described first resistance and the second inverting input of described dual operational amplifier are the first output terminal of described control module, first inverting input of described dual operational amplifier and the first end of described first electric capacity are the first input end of described control module, first normal phase input end of described dual operational amplifier and the second end of described first resistance, second end of the second resistance and the first end of the 3rd resistance connect, the power end of described dual operational amplifier, the first end of described second electric capacity, second end of described second resistance and the first end of described 5th resistance are the second input end of described control module, second output terminal of described dual operational amplifier is the second output terminal of described control module, second normal phase input end of described dual operational amplifier is connected with the second end of the first end of described 4th resistance and described 5th resistance, second end of described 3rd resistance, second end of described first electric capacity, the negative electricity source of described dual operational amplifier, the earth terminal of described dual operational amplifier, second end of described second electric capacity and the second end of described 4th resistance are connected to power supply ground altogether.
3., as claimed in claim 1 based on the charging current pick-up unit of USB charging wire, it is characterized in that, described indicating module comprises the first light emitting diode, the second light emitting diode, the 6th resistance and the 7th resistance;
First negative pole end of described first light emitting diode and the first negative pole end of described second light emitting diode are the first input end of described indicating module, second negative pole end of described first light emitting diode and the second negative pole end of described second light emitting diode are the second input end of described indicating module, first positive terminal of described first light emitting diode is connected with the first end of the second positive terminal of described first light emitting diode with described 6th resistance, first positive terminal of described second light emitting diode is connected with the first end of the second positive terminal of described second light emitting diode with described 7th resistance, second end of described 6th resistance and the second end of described 7th resistance are the 3rd input end of described indicating module.
4., as claimed in claim 1 based on the charging current pick-up unit of USB charging wire, it is characterized in that, described sampling module is the 8th resistance;
The first end of described 8th resistance is the output terminal of described sampling module, and the second end of described 8th resistance is connected to power supply ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520605345.XU CN205015459U (en) | 2015-08-12 | 2015-08-12 | Charging current detection device based on USB charging wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520605345.XU CN205015459U (en) | 2015-08-12 | 2015-08-12 | Charging current detection device based on USB charging wire |
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| CN205015459U true CN205015459U (en) | 2016-02-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410926A (en) * | 2016-09-21 | 2017-02-15 | 成都启立辰智科技有限公司 | Constant current charging circuit structure for electric vehicle |
| CN106546822A (en) * | 2016-10-26 | 2017-03-29 | 珠海市魅族科技有限公司 | The impedance detection method of the charging circuit of load, chip and mobile terminal |
| CN112564075A (en) * | 2020-12-21 | 2021-03-26 | 张成君 | Bidirectional charging wire structure |
-
2015
- 2015-08-12 CN CN201520605345.XU patent/CN205015459U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410926A (en) * | 2016-09-21 | 2017-02-15 | 成都启立辰智科技有限公司 | Constant current charging circuit structure for electric vehicle |
| CN106546822A (en) * | 2016-10-26 | 2017-03-29 | 珠海市魅族科技有限公司 | The impedance detection method of the charging circuit of load, chip and mobile terminal |
| CN106546822B (en) * | 2016-10-26 | 2019-04-05 | 珠海市魅族科技有限公司 | Impedance detection method, chip and the mobile terminal of the charging circuit of load |
| CN112564075A (en) * | 2020-12-21 | 2021-03-26 | 张成君 | Bidirectional charging wire structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: Longgang District of Shenzhen City, Guangdong province 518116 Ping Street Takahashi Industrial Park East Area Patentee after: SHENZHE GUANXU ELECTRONIC CO., LTD. Address before: Longgang District of Shenzhen City, Guangdong province 518116 Ping Street Takahashi Industrial Park East Area Patentee before: Shenzhen Grandsun Electronic Co., Ltd. |