CN210468825U

CN210468825U - Charging device with charging head overheat protection

Info

Publication number: CN210468825U
Application number: CN201921165077.9U
Authority: CN
Inventors: 张成君
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-05-05
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a charging device with first overheat protection charges, including the charging line, be formed with on the charging line and be used for connecting by the equipment that charges the head, concatenate in on the charging line to and detect control circuit, detect control circuit with the on-off switch coupling, just detect control circuit and detect the temperature of the head that charges control when the temperature of the head that charges surpasss preset range the on-off switch disconnection. Compared with the prior art, the utility model discloses a charging device controls the disconnection of charging circuit after charging the first overheated, stops charging, prevents to charge the first overheated charging of head, delays charging first circuit aging time, improves charging device's life-span for charging device keeps the charging efficiency who dispatches from the factory as long as possible.

Description

Charging device with charging head overheat protection

Technical Field

The utility model relates to a charging device especially relates to a charging device with first overheat protection charges.

Background

With the progress of science and technology, electronic products are increasingly developed to be light, thin, short and small, wherein handheld devices, such as tablet computers, smart phones, video players and other indispensable personal belongings in daily life, are provided with sub-chargers and charging cables so as to transmit electric energy at a power supply end to the handheld devices for charging and data transmission of the handheld devices.

In order to ensure charging safety, the temperature of the battery is generally detected, when the temperature of the battery exceeds a certain value, the battery is judged to be overheated and related safety measures are started, however, not only the battery is overheated during charging, but also the charging head often becomes very hot, and the aging and the fault of a circuit in the charging head can be caused to influence the charging efficiency for a long time, so that the longer the service time of the charging device is, the worse the charging efficiency is, and even the charging device is difficult to charge under the condition of normal charging display, and therefore, a charging device capable of solving the problems is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a first overheat protection's that charges charging device can cut off the power supply after the head that charges is overheated to the protection head that charges prevents that the head that charges is overheated to cause the circuit ageing, improves product life, keeps charge efficiency.

In order to purposefully in the realization, the utility model discloses a charging device with first overheat protection charges, including the charging line, form in be used for connecting on the charging line by the equipment that charges the head, concatenate in on the charging line on the on-off switch to and detect control circuit, detect control circuit with the on-off switch coupling, just detect control circuit and detect the temperature of the head that charges control when the temperature of the head that charges surpasss preset range the on-off switch disconnection.

Compared with the prior art, the utility model discloses a charging device controls the disconnection of charging circuit after charging the first overheated, stops charging, prevents to charge the first overheated charging of head, delays charging first circuit aging time, improves charging device's life-span for charging device keeps the charging efficiency who dispatches from the factory as long as possible.

Preferably, the detection control circuit further controls the on-off switch to be closed when the temperature of the charging head does not exceed the preset range or when a preset time elapses.

Preferably, the detection control circuit includes a temperature detection circuit disposed at the charging head and a temperature comparison circuit coupled to the temperature detection circuit, the temperature detection circuit detects the temperature of the charging head to obtain an interface temperature, the temperature comparison circuit compares the interface temperature with a preset temperature, and controls the on-off switch to be turned off when the interface temperature is greater than or equal to the preset temperature, and controls the on-off switch to be turned on when the interface temperature is less than the preset temperature or a preset time elapses.

Preferably, the charging device with charging head overheat protection further includes a temperature indicating unit, the temperature indicating unit is connected to the detection control circuit, and the detection control circuit further controls the temperature indicating unit to indicate the interface overheat when the interface temperature exceeds a preset range.

Preferably, the charging device with charging head overheat protection further includes a charging indication unit, and the detection control circuit further detects a charging state of the charging line, and controls the charging indication unit to operate according to the charging state of the charging line to complete charging indication.

Specifically, the detection control circuit acquires the charging current and the charging voltage of the charging circuit to detect the charging power of the charging circuit, and controls the charging indication unit to indicate different charging powers.

Preferably, the detection control circuit further detects a charging state of the charging line, controls the charging line to be disconnected after the charged device is fully charged, and controls the charging line to be closed after a preset time after the charged device is fully charged.

Preferably, the charging device with charging head overheating protection further comprises a charging wire forming a charging circuit, the charging wire comprises a cable and the charging head, and the charging head is used for connecting a charged device and is coupled to the first end of the cable.

Specifically, the charging head is an expansion connector or a standard, mini, micro, Lightning, Type-C standard USB connector.

Specifically, the charging cable further comprises a power supply head, wherein the power supply head is used for connecting a power supply source and is coupled to the second end of the cable.

More specifically, the power supply head is an interface for connecting a power adapter or a standard, mini, micro and Type-C USB connector.

Drawings

Fig. 1 is a schematic circuit diagram of a charging device with charging head overheat protection according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a charging device with charging head overheat protection according to a first embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a charging device with charging head overheat protection according to a second embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a charging device with charging head overheat protection according to a second embodiment of the present invention.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Referring to fig. 1, the utility model discloses a charging device 100 with first overheat protection charges, including charging line 10, form in charging line 10 is last and be used for connecting by the equipment that charges head 12, concatenate in on charging line 10 on break-make switch 20 to and detect control circuit 30, detect control circuit 30 with the coupling of break-make switch 20, just detect control circuit 30 detects the temperature of the head that charges, whether the temperature of the head 12 that charges of comparison surpasss the preset range, controls the action of break-make switch 20 according to the comparative result the temperature of the head 12 that charges surpasss when presetting the range control break-make switch 20 disconnection. In this embodiment, the preset temperature is 99 degrees celsius, and other temperature values may be selected as the preset temperature.

Wherein, the detection control circuit 30 also controls the on-off switch 20 to close when the temperature of the charging head 12 does not exceed the preset range. Alternatively, the detection control circuit 30 also starts timing while the temperature of the charging head 12 exceeds a preset range to open the on-off switch 20, and controls the on-off switch 20 to be closed when a preset time elapses.

Referring to fig. 1, the detection control circuit 30 includes a temperature detection circuit 31 disposed at the charging head 12 and a temperature comparison circuit 32 coupled to the temperature detection circuit 31, the temperature detection circuit 31 detects the temperature of the charging head 12 to obtain an interface temperature, the temperature comparison circuit 32 compares the interface temperature with a preset temperature, and controls the on-off switch 20 to be turned off when the interface temperature is greater than or equal to the preset temperature and controls the on-off switch 20 to be turned on when the interface temperature is less than the preset temperature. The temperature detecting circuit 31 includes a thermistor NTC and a first resistor R1, the thermistor NTC and the first resistor R1 are connected in series between a rated voltage Vdd and ground, and a node between the thermistor NTC and the first resistor R1 forms an output terminal of the temperature detecting circuit 31 and is connected to the temperature comparing circuit 32. The temperature comparison circuit 32 includes a comparator, an input terminal of the comparator is connected to the output terminal of the temperature detection circuit 31 and a preset voltage, an output terminal outputs a comparison result, and a switching device such as a trigger may be further provided between the comparator and the on-off switch 20. In this embodiment, the resistance of the thermistor NTC is 22K at normal temperature, the resistance of the first resistor is 1K, and the rated voltage Vdd is 5V. Alternatively, the output end of the temperature comparison circuit 32 is further connected with a timing unit, the output end of the timing unit is connected with the on-off switch 20, the temperature comparison circuit 32 controls the timing unit to start working when the interface temperature is greater than or equal to the preset temperature, and the timing unit controls the on-off switch 20 to be closed when the preset time is reached.

Referring to fig. 1, the charging device 100 with charging head overheat protection further includes a temperature indicating unit 41, the temperature indicating unit 41 is connected to the detection control circuit 30, the detection control circuit 30 further controls the temperature indicating unit 41 to indicate interface overheat when the interface temperature exceeds a preset range, for example, the temperature indicating unit 41 is an indicator light, and the detection control circuit 30 controls the temperature indicating unit 41 to flash red light to indicate that the charging head 12 is overheated. Of course, the indication unit 40 may have other structures, such as a liquid crystal display, etc.

Referring to fig. 2, in this embodiment, the charging device 100 with charging head overheat protection further includes a charging wire forming a charging line 10, the charging wire includes a cable 11 and the charging head 12, and the charging head 12 is used for connecting a device to be charged and is coupled to a first end of the cable 11. The charging head 12 is an expansion connector or a standard, mini, micro, Lightning, Type-C USB connector, etc. A plurality of wires are arranged in the cable 11 and are respectively used for transmitting power and data.

Referring to fig. 2, the charging cord further includes a power supply head 13, and the power supply head 13 is used for connecting a power supply and is coupled to the second end of the cable 11. Wherein, the power supply head 13 is an interface for connecting a power adapter or a USB connector of standard, mini, micro specification, Type-C specification, etc.

Referring to fig. 3 and 4, based on the first embodiment, in the second embodiment of the present invention, the charging device 100a with charging head overheat protection further includes a charging indication unit 42, the detection control circuit 30a further detects the charging state of the charging line 10, and controls the charging indication unit 42 to operate to complete the charging indication according to the charging state of the charging line 10. Specifically, the detection control circuit 30a obtains the charging current and the charging voltage of the charging line 10 to detect the charging power of the charging line 10, and controls the charging indication unit 42 to indicate different charging powers, wherein the charging indication unit 42 can turn on/off the frequency of the light flashing to indicate the charging power, and the larger the charging power is, the faster the flashing is, and the green light is indicated after full charging.

Specifically, the on-off switch comprises a first switch tube Q1 and a second switch tube Q2, the temperature comparison circuit 32 compares the interface temperature with a preset temperature, controls the first switch tube Q1 to be switched off when the interface temperature is greater than or equal to the preset temperature, and controls the first switch tube Q1 to be switched on when the interface temperature is less than the preset temperature. The detection control circuit 30a further includes a charging state detection circuit 33, the charging state detection circuit 33 determines a charging state according to the charging current and/or the charging voltage detected by the detection circuit 34, after the charged device is fully charged, the charging state detection circuit controls the second switch tube Q2 to be opened so as to open the charging line 10, and after the second switch tube Q2 is opened, the charging line 10 is controlled to be closed after a preset time. Specifically, the charging state detection circuit 33 includes a comparison unit and a timing unit, the comparison unit compares the charging voltage and/or the charging current with a preset voltage and/or a preset current, and determines that the charged device is fully charged when the charging voltage and/or the charging current exceeds the preset value, the second switch Q2 is turned off and the timing unit is started, and the timing unit controls the second switch Q2 to be turned on after the preset time is reached. Of course, the on-off switch may also be a switch tube, and in this case, the detection control circuit 30a should further include an and operator, an input end of the and operator is connected to the temperature comparison circuit 32 and the charging state detection circuit 33, an output end of the and operator is connected to a control end of the on-off switch, and the on-off switch is controlled to be closed when the temperature comparison circuit 32 and the charging state detection circuit 33 both close the charging circuits.

In this embodiment, the detection control circuit 30a is installed in the charging head 12, and of course, the detection control circuit 30a may also be installed in the power supply head 13.

Based on the embodiment, a start button can be further provided, and the start button can be operated to control the on-off switch to be closed so as to close the charging circuit 10, so that the charging device can be manually started after the overheat environment is relieved or the charged equipment is replaced.

Of course, the detection control circuit can also detect whether the charging current and the charging voltage exceed an upper limit value so as to perform overvoltage and overcurrent protection, and the second switching tube is controlled to be switched off when the charging current and the charging voltage exceed the upper limit value.

Different from the above embodiments, the charging indication unit 42 and the temperature indication unit 41 may share an indicator light, and different states of the indicator light may indicate situations such as overheating, full charging, and charging efficiency, for example, a plurality of indicator lights flash red light synchronously to indicate overheating, flash streamer light to indicate charging efficiency, and turn green and do not flash to indicate full charging.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. A charging device with charging head overheat protection is characterized in that: including the charging line, form in on the charging line and be used for connecting by the equipment that charges the head, concatenate in on the charging line on the on-off switch to and detection control circuit, detection control circuit with the on-off switch coupling, just detection control circuit detects the temperature of the head that charges controls when the temperature of the head that charges surpasss preset range on-off switch disconnection.

2. A charging device with charging head overheat protection as set forth in claim 1, wherein: the detection control circuit also controls the on-off switch to be closed when the temperature of the charging head does not exceed the preset range or a preset time elapses.

3. A charging device with charging head overheat protection as set forth in claim 2, wherein: the detection control circuit comprises a temperature detection circuit arranged at the position of the charging head and a temperature comparison circuit coupled with the temperature detection circuit, the temperature detection circuit detects the temperature of the charging head so as to obtain an interface temperature, the temperature comparison circuit compares the interface temperature with a preset temperature, the on-off switch is controlled to be switched off when the interface temperature is greater than or equal to the preset temperature, and the on-off switch is controlled to be switched on when the interface temperature is less than the preset temperature or a preset time elapses.

4. A charging device with charging head overheat protection as set forth in claim 3, wherein: the temperature indication unit is connected with the detection control circuit, and the detection control circuit controls the temperature indication unit to indicate the overheating of the interface when the temperature of the interface exceeds a preset range.

5. A charging device with charging head overheat protection as set forth in claim 1, wherein: the charging indication device comprises a charging indication unit, the detection control circuit is used for detecting the charging state of the charging circuit and controlling the charging indication unit to act to complete charging indication according to the charging state of the charging circuit.

6. A charging device with charging head overheat protection as set forth in claim 1, wherein: the detection control circuit also detects the charging state of the charging circuit, controls the charging circuit to be disconnected after the charged device is fully charged, and controls the charging circuit to be closed after a preset time after the charging circuit is fully charged.

7. A charging device with charging head overheat protection as set forth in claim 1, wherein: the charging wire comprises a cable and the charging head, and the charging head is used for connecting a charged device and is coupled to the first end of the cable.

8. A charging device with charging head overheat protection as set forth in claim 7, wherein: the charging head is an expansion connector or a standard, mini, micro, Lightning and Type-C USB connector.

9. A charging device with charging head overheat protection as set forth in claim 8, wherein: the charging cord further comprises a power supply head, wherein the power supply head is used for connecting a power supply and is coupled to the second end of the cable.

10. A charging device with charging head overheat protection as set forth in claim 9, wherein: the power supply head is an interface for connecting a power adapter or a USB connector with standard, mini, micro specification and Type-C specification.