CN209994125U

CN209994125U - Butt-joint charging circuit and electronic equipment

Info

Publication number: CN209994125U
Application number: CN201920583232.2U
Authority: CN
Inventors: 陶红霞
Original assignee: Shanghai Yuehuo Microelectronics Co Ltd
Current assignee: Shanghai Yuehuo Microelectronics Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-01-24
Anticipated expiration: 2029-04-26

Abstract

The utility model provides a dock charging circuit and electronic equipment, this dock charging circuit include the side module of supplying power that can dock mutually and accept the side module, wherein, because the side module of supplying power can form the first loop that contains first intermediate end, second intermediate end, first resistance circuit etc. with the side module of accepting when just connecing, then does not form the first loop when the reversal connects, the utility model discloses can provide the circuit foundation for just connecing and the judgement of reversal connection, based on this circuit foundation, can be favorable to avoiding the power supply when the reversal connects and lead to causing the damage to the device in the side module of supplying power and the side module of accepting, played the positive and negative safety protection effect of judging and corresponding. And simultaneously, the utility model discloses a power supply side drive unit provides the hardware basis for the external selectivity power supply to the control of first switch unit, and it can be favorable to avoiding the emergence of the unsafe power supply situation, has played the safety protection effect that corresponds.

Description

Butt-joint charging circuit and electronic equipment

Technical Field

The utility model relates to an electronic equipment field especially relates to a dock charging circuit and electronic equipment.

Background

In various electronic products, wired charging can be performed through a contact in a charging interface, or directly through the contact, where the charging interface may be, for example, a USB interface or a conventional positive-negative bipolar power interface, and the like, and the manner of directly performing charging through the contact may be applied to a small number of mobile phones without a standard charging interface, some charging back holders, or other electronic devices capable of supporting wired charging, which may be, for example, wearable devices such as watches and wristbands.

In the related art, a docking type charging circuit for wired charging may utilize a power supply side module to supply power to a battery power supply unit in a receiving side module, so as to achieve the purpose of charging a battery, wherein a voltage output end of the power supply side module and a first grounding end are butted against a voltage input end and a second grounding end of the receiving side module, so as to supply power to the battery power supply unit, a corresponding metal contact may be utilized between the voltage output end and the voltage input end to achieve conduction connection, and a corresponding metal contact may be utilized between the first grounding end and the second grounding end to achieve conduction connection.

However, if the power-supplying side module and the receiving side module are connected in reverse, for example, the voltage output terminal is connected to the second ground terminal, and the voltage input terminal is connected to the first ground terminal, the devices in the power-supplying side module and the receiving side module may be damaged.

Meanwhile, an unexpected short circuit occurs between the voltage output terminal of the power supply side module and the first ground terminal, or an unexpected short circuit occurs between the voltage input terminal of the receiving side module and the second ground terminal, which may cause the situations of electric leakage, damage, and the like of the circuit module.

In addition, the power supply side module may be charged by docking with the receiving side module, which may also cause an ill-fitting device to be charged, a non-fitting device to be charged, or other situations that may cause unsafe charging to occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dock charging circuit and electronic equipment to solve between power supply side module and the acceptance side module by the transposition probably to the problem that the device in power supply side module and the acceptance side module caused the damage. Further alternatives may also be advantageous to account for electrical leakage, damage to circuit modules caused by accidental shorts, and further alternatives may also account for charging of devices that are not compliant, or other conditions that may cause unsafe charging.

According to a first aspect of the present invention, there is provided a docking type charging circuit, comprising a power supply side module and a receiving side module that can be docked with each other, the power supply side module comprising a power supply, a voltage output terminal connected to the power supply, and a first ground terminal, the receiving side module comprising a battery power supply unit, a voltage input terminal connected to the battery power supply unit, and a second ground terminal;

the receiving side module further comprises a second middle end, a first resistance circuit and a second resistance circuit;

the power supply unit is connected between the first intermediate end and the power supply to output a target current to the first intermediate end under the power supply of the power supply; the second middle end is connected with the first end of the first resistance line, and the second end of the first resistance line and the second grounding end are grounded together;

the voltage output end is in butt joint with the voltage input end, and when the first grounding end is in butt joint with the second grounding end, the power supply unit, the first middle end, the second middle end and the first resistance line are sequentially conducted with the ground to form a first loop;

the first switch unit is connected between the power supply and the voltage output end, the sampling end of the power supply side driving unit is connected with the first middle end so as to collect the voltage of the first middle end, and the output end of the power supply side driving unit is connected with the first switch unit so as to control the on-off of the first switch unit.

Optionally, the receiving-side module further includes a second resistive line, the second middle end is further connected to a first end of the second resistive line, and a second end of the second resistive line is connected to the voltage input end; the voltage output end is in butt joint with the second grounding end, and when the first grounding end is in butt joint with the voltage input end, the power applying unit, the first middle end, the second resistance circuit and the first grounding end are sequentially conducted with the ground to form a second loop.

Optionally, the first resistor line includes a first resistor, a first end of the first resistor is connected to the second middle end, and a second end of the first resistor and the second ground end are grounded together;

the second resistance line comprises a second resistance and a low forward conduction voltage drop diode, a first end of the low forward conduction voltage drop diode is connected to the second middle end, a second end of the low forward conduction voltage drop diode is connected to the voltage input end, and the second resistance is connected between the low forward conduction voltage drop diode and the second middle end or between the low forward conduction voltage drop diode and the voltage input end.

Optionally, the position of the contact corresponding to the first middle end is located at a midpoint between the contact corresponding to the voltage output end and the contact corresponding to the first ground end, and the position of the contact corresponding to the second middle end is located at a midpoint between the contact corresponding to the voltage input end and the contact corresponding to the second ground end.

Optionally, the receiving-side module further includes a receiving-side driving unit and a second switching unit;

the second switch unit is connected between the voltage input end and the battery power supply unit, the sampling end of the receiving side driving unit is directly or indirectly connected with the voltage input end so as to collect the voltage of the voltage input end, and the output end of the receiving side driving unit is connected with the second switch unit so as to control the on-off of the second switch unit.

Optionally, the receiving-side module further includes a capacitor, a power supply end of the receiving-side driving unit is connected to a first end of the capacitor, the first end of the capacitor is further connected to the second middle end, and a second end of the capacitor and the second ground end are grounded together.

Optionally, the communication port of the receiving-side driving unit is connected to the second intermediate end, so that the second intermediate end is used to interact with the power-supply-side driving unit of the power-supply-side module or other circuit units.

Optionally, the power supply side module is a circuit module in any one of the following electronic devices: the system comprises a mobile phone, wearable equipment, a tablet personal computer, a computer, an intelligent television, image acquisition equipment, a charger and an intelligent socket;

the receiving side module is a circuit module in any one of the following electronic devices: cell-phone, wearable equipment, panel computer, smart television, image acquisition equipment, earphone.

According to a second aspect of the present invention, there is provided an electronic device, comprising a power supply side module, the power supply side module comprising a power supply, a voltage output end connected to the power supply, and a first ground end, the power supply side module further comprising a power supply side driving unit, a power supply unit, a first switch unit, and a first intermediate end;

the power supply unit is connected between the first intermediate end and the power supply so as to output a target current by utilizing the first intermediate end under the power supply of the power supply; the first intermediate end is used for being butted with a second intermediate end of a receiving side module of other electronic equipment, so that when the voltage output end is butted with a voltage input end of the receiving side module and the first grounding end is butted with a second grounding end of the receiving side module, the power supply unit, the first intermediate end, the second intermediate end and a first resistance line of the receiving side module are sequentially conducted with the ground to form a first loop;

the first switch unit is connected between the power supply and the voltage output end, the sampling end of the power supply side drive unit is connected with the first middle end, and the output end of the power supply side drive unit is connected with the first switch unit.

According to a third aspect of the present invention, there is provided an electronic apparatus comprising a receiving-side module for receiving power supply from a power supply-side module of the electronic apparatus relating to the second aspect and the optional aspects thereof, the receiving-side module comprising a battery power supply unit, a voltage input terminal connected to the battery power supply unit, a second ground terminal, and a second intermediate terminal, a first resistance line, a receiving-side driving unit, and a second switching unit;

the second middle end is connected with the first end of the first resistance line, and the second end of the first resistance line and the second grounding end are grounded together;

the second intermediate end is used for being butted with the first intermediate end so as to form the first loop when the voltage output end is butted with the voltage input end and the first grounding end is butted with the second grounding end;

The utility model provides an among dock charging circuit and electronic equipment, because the first circuit that contains end in the middle of the first middle of can forming when just connecing of side module of power supply side and accepting, first resistance circuit etc. then does not form the first circuit when the reversal, the utility model discloses can provide the circuit foundation for just connecing and the judgement of reversal, based on this circuit foundation, can be favorable to avoiding the power supply when the reversal and lead to causing the damage to the device in side module of power supply side and accepting, played the positive and negative safety protection effect of judging and corresponding.

And simultaneously, the utility model discloses a power supply side drive unit provides the hardware basis for the external selectivity power supply to the control of first switch unit, and it can be favorable to avoiding the emergence of the unsafe power supply situation, has played the safety protection effect that corresponds. For example, in an alternative, if a second loop is formed, the first intermediate end does not form a loop to the outside, a short circuit occurs in a part of the ports, or a part of the ports is in contact with other external conductors which are not adapted, the first switching unit may be controlled to be turned off, so as to avoid charging the modules on the receiving side which are not adapted, or other situations which may cause insecurity.

The utility model discloses in the alternative, because the position that first middle-end corresponds the contact is located the midpoint position that voltage output end corresponds between the contact and the first earthing terminal corresponds the contact, the position that the second middle-end corresponds the contact is located the midpoint position that voltage input end corresponds between the contact and the second earthing terminal corresponds the contact, it can be convenient for make no matter just connect or the transposition, the contact homoenergetic of two middle-ends can realize connecting.

The utility model discloses in the alternative, utilize and accept the control of side drive unit to second switch unit to and the collection to the voltage input terminal voltage, can be favorable to avoiding voltage to be not suitable for when charging to implement charging and cause the damage to the device, further improve safety protection's effect.

The utility model discloses in the alternative, because the electric capacity that can the energy storage has been connected to the power supply end of accepting side drive unit, if the circuit module that inserts does not have first middle-end, then can't make electric capacity charged to required voltage, and then, accept that side drive unit can't implement control under the power supply of electric capacity, it can be favorable to avoiding being charged by the power supply side module of not fitting, and then avoided consequently and the unsafe charging that probably causes.

The utility model discloses in the alternative, because the end is mutual in the middle of the usable second of the communication end of accepting side drive unit, it provides the hardware basis for the mechanism of instruction communication.

The utility model discloses in the alternative, combine the energy storage effect of electric capacity and the energy storage effect of communication end, can be so that when accepting the side module and not supplied power, accept the side drive unit and still can provide certain electric energy and ensure interactive instruction's interaction.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a first schematic circuit diagram of a docking charging circuit according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram illustrating a reverse connection of a docking charging circuit according to an embodiment of the present invention;

fig. 3 is a second schematic circuit diagram of the embodiment of the present invention when the docking charging circuit is being docked;

fig. 4 is a third schematic circuit diagram of the embodiment of the present invention when the docking charging circuit is being docked;

fig. 5 is a fourth schematic circuit diagram of the embodiment of the present invention when the docking charging circuit is being docked;

fig. 6 is a schematic circuit diagram of an electronic device including a power supply side module according to an embodiment of the present invention;

fig. 7 is a schematic circuit diagram of an electronic device including a receiving-side module according to an embodiment of the present invention.

Description of reference numerals:

1-a supply side module;

11-a power supply;

12-a power-on unit;

121-a current source;

13-a first switching unit;

14-a power supply side drive unit;

15-voltage output;

16-a first intermediate end;

17-a first ground;

2-a receiver-side module;

21-a first resistive line;

22-a second resistive line;

23-a battery power supply unit;

24-a voltage input;

25-a second intermediate end;

26-second ground;

27-a second switching unit;

28-receiving side drive unit;

r1 — first resistance;

r2 — second resistance;

d1-low forward conduction drop diode;

d2-diode;

c1-capacitance;

FET 1-first field effect transistor;

FET 2-second field effect transistor;

FET 3-third field effect transistor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 1 is a first schematic circuit diagram of a docking charging circuit according to an embodiment of the present invention; fig. 2 is a schematic circuit diagram of a docking charging circuit according to an embodiment of the present invention.

Referring to fig. 1 and 2, the docking type charging circuit includes a power supply side module 1 and a receiving side module 2 that can be docked with each other, the power supply side module 1 includes a power supply 11, a voltage output terminal 15 connected to the power supply 11, and a first ground terminal 17, and the receiving side module 2 includes a battery power supply unit 23, a voltage input terminal 24 connected to the battery power supply unit 23, and a second ground terminal 26.

With the docking between the voltage output terminal 15 and the voltage input terminal 24 and the docking of the first ground terminal 17 and the second ground terminal 26, the power of the power source can be supplied to the battery power supply unit 23 to charge the battery power supply unit 23, with both being turned on.

The voltage output by the voltage output terminal 15 can be characterized as Vout, the voltage input by the voltage input terminal 24 can be characterized as Vin, the voltage across the power supply can be characterized as V1, and the corresponding voltage output to the voltage output terminal 15 and the energizing unit 12 can be characterized as Vee.

A battery power supply unit 23, which may be characterized as: the Battery-Powered System may be a circuit unit that can be connected to a Battery and can supply electric energy to the Battery to charge the Battery, for example, a circuit unit that can implement a linear charging method, a switching charging method, and the like, and any type of Battery power supply unit 23 may be understood as an implementation of the embodiment of the present invention.

A power supply Side module 1, which can be characterized as Source Side; the receiving side module 2 can be characterized as SinkSide, i.e. the receiving side. The electronic device can be only provided with the power supply side module 1 to supply power for charging other electronic devices, the electronic device can also be only provided with the receiving side module 2 to be supplied with power by other electronic devices to realize charging, and the electronic device can also be simultaneously provided with the power supply side module 1 and the receiving side module 2 to supply power for charging another electronic device and can be charged by another electronic device.

The supply-side drive unit 14, according to its resulting action, can be characterized, in one example, as: identification indicating Gate Driving.

In this embodiment, the power supply side module 1 further includes a power supply side driving unit 14, a power applying unit 12, a first switch unit 13, and a first intermediate terminal 16, and the receiving side module 2 further includes a second intermediate terminal 25 and a first resistance line 21.

The power supply unit 12 is connected between the first intermediate terminal 16 and the power supply 12 to output a target current to the first intermediate terminal 16 under the power supply of the power supply 11; therefore, the energizing unit 12 may include a current source 121 in one example, and may include a voltage dividing unit in another example, where the voltage dividing unit may be implemented by dividing voltage through resistors, for example. It can be seen that the target current may be a fixed current value or a varying current value.

The second intermediate terminal 25 is connected to the first terminal of the first resistance line 21, and the second terminal of the first resistance line 21 is grounded together with the second ground terminal 26.

When the voltage output terminal 15 is connected to the voltage input terminal 24 and the first ground terminal 15 is connected to the second ground terminal 26, the power applying unit 12, the first intermediate terminal 16, the second intermediate terminal 25, the first resistance line 22 are sequentially connected to ground to form a first loop, which may be as shown in fig. 1.

The first switch unit 13 is connected between the power source 11 and the voltage output end 15, the sampling end of the power supply side drive unit 14 is connected to the first intermediate end 16, the output end of the power supply side drive unit 14 is connected to the first switch unit 13, the power supply side drive unit 14 is configured to control on/off of the first switch unit 13 according to the voltage of the first intermediate end 16, so as to control the first switch unit 13 to be turned on when the first loop is formed, and: the first switching unit 13 is controlled to be turned off in at least a partial circuit state where the first loop is not formed.

After the first loop is formed, the theoretical voltage of the first intermediate terminal 16 should be a first voltage value under the power supply of the target current. The first voltage value may be determined according to a voltage drop value and/or a resistance value of the first resistance line 21, a current value of the target current, and a voltage value, such as Vee, externally output by the power supply.

In one embodiment, if the target current is a fixed current value, the first voltage value is a voltage value when the first loop is formed, and when the first loop is not formed, the voltage of the first intermediate terminal 16 may be different from the first voltage value, and it may be determined whether the first loop is currently formed by determining whether the collected voltage value of the first intermediate terminal 16 is the first voltage value or whether a difference between the collected voltage value and the first voltage value is smaller than a threshold value, for example, if the voltage value of the first intermediate terminal 16 is the first voltage value or the difference between the collected voltage value and the first voltage value is smaller than the threshold value, it is determined that the first loop is formed.

In a specific implementation, when the first resistance line 21 can provide a resistance of 5.1K Ω, the current value of the target current is fixed 330 μ a, and the first voltage value can be 1.68V.

In another embodiment, if the target current is a fixed current value, when the first loop is not formed, the voltage of the first intermediate terminal 16 may be a second voltage value different from the first voltage value, and it may also be determined whether the collected voltage value of the first intermediate terminal 16 is the second voltage value or whether the difference between the collected voltage value and the second voltage value is smaller than a threshold value, and it is determined whether the first loop is currently in another circuit state other than the first loop, and if so, it may be inferred that the first loop is not formed currently. For example: if the voltage value of the first intermediate terminal 16 is the second voltage value, or the difference between the second voltage value and the first voltage value is smaller than the threshold, it is determined that the first loop is not formed.

In a specific implementation, if the first voltage value is 1.68V, the forward voltage of the low forward conduction drop diode in the second resistance line 22 in the second loop is 0.2V, and the second resistance line 22 provides a resistance of 100 Ω, the second voltage value may be, for example, 0.233V, which is the theoretical voltage of the first intermediate terminal 16 when the second loop is formed. In an optional implementation process, other second voltage values can be designed for at least the situations of short circuit, external conductor connection and the like, and further, whether the first loop is formed can be judged by referring to logic. The specific implementation logic may vary depending on the circumstances under consideration.

In addition, the first voltage value and the second voltage value can be combined at the same time to realize the judgment.

Therefore, the judgment of whether the first loop is formed can be a direct judgment or an indirect judgment.

In another embodiment, whether the target current is a fixed current value or a variable current value, whether the first loop is formed can be determined according to the variation of the voltage value of the first intermediate terminal 16. For example, when the target current is a fixed current value, it can be determined whether the first loop is formed by determining whether the voltage value of the first intermediate terminal 16 changes from the first voltage value to the second voltage value, and/or determining whether the voltage value changes from the second voltage value to the first voltage value.

The judgment logic can determine an interval which is favorable for representing the normal range of the voltage value of the first middle end 16 in the first loop through calculation of a circuit principle after setting the parameter values of corresponding circuit elements. If the time falls within the interval, it is determined that the first loop is formed.

In each of the above embodiments, because the power supply side module can form the first loop that contains first intermediate end, second intermediate end, first resistance circuit etc. with the accepting side module when just connecing, then do not form first loop when the reversal connects, the utility model discloses can provide the circuit foundation for just connecing and the judgement of reversal connection, and then, combine the control of power supply side drive unit to first switch element, can control first switch element to switch on when just connecing to realize the power supply, control first switch element to turn off when the reversal connects, and power supply and lead to causing the damage to the device in power supply side module and the accepting side module when avoiding the reversal connects, played positive and negative judgement and corresponding safety protection effect.

Meanwhile, the above embodiment provides a hardware basis for external selective power supply by controlling the first switch unit through the power supply side driving unit, which can be beneficial to avoiding the occurrence of unsafe power supply situation and plays a corresponding safety protection role. For example, in an alternative, if a second loop is formed, the first intermediate end does not form a loop to the outside, a short circuit occurs in a part of the ports, or a part of the ports is in contact with other external conductors which are not adapted, the first switching unit may be controlled to be turned off, so as to avoid charging the modules on the receiving side which are not adapted, or other situations which may cause insecurity.

In one embodiment, referring to fig. 1 and fig. 2, the receiving-side module 2 further includes a second resistive line 22, the second middle end 25 is further connected to a first end of the second resistive line 22, and a second end of the second resistive line 22 is connected to the voltage input end 24; when the voltage output terminal 15 is connected to the second ground terminal 26 and the first ground terminal 17 is connected to the voltage input terminal 24, the power applying unit 12, the first intermediate terminal 16, the second intermediate terminal 25, the second resistance line 22, the voltage input terminal 24, and the first ground terminal 17 are sequentially connected to ground to form a second loop.

Thus, at least a part of the circuit states in which the first loop is not formed may include the circuit states in which the second loop is formed. It can be seen that when the power supply side module 1 and the receiving side module 2 are connected in the forward direction, as shown in fig. 1, a first loop can be formed, and when the power supply side module 1 and the receiving side module 2 are connected in the reverse direction, as shown in fig. 2, a second loop can be formed.

When the second circuit is formed, it can be understood that reverse connection occurs, and the power supply side driving unit 14 can turn off the first switching unit 13.

In a specific implementation, the power supply side driving unit 14 may further be connected to an alarm component to control the alarm component to alarm when a second loop is formed, that is, when reverse connection occurs, the alarm component may include, for example, a light emitting diode for alarm indication, and the controller may control the light emitting diode to emit light or control the light emitting diode to flash.

In one embodiment, the at least part of the circuit state where the first loop is not formed may include: the first middle terminal 16 does not form a circuit state of a loop to the outside; which can be understood as the circuit state when the first intermediate terminal 16 is connected to the external air.

Furthermore, when the first intermediate terminal 16 is connected to the outside air, the power supply side driving unit 14 can control the first switching unit 13 to be turned off, thereby preventing the voltage output terminal 15 from outputting electricity to the outside to cause a leakage or the like, and further improving safety.

In one embodiment, the at least part of the circuit state where the first loop is not formed may include: a short circuit occurs between at least two of the voltage output terminal 15, the first intermediate terminal 16, and the first ground terminal 17. At least part of the circuit states in which the first loop is not formed may include: a short circuit occurs between at least two of the voltage input terminal 24, the second intermediate terminal 25, and the second ground terminal 26.

Furthermore, when the port is short-circuited, the first switch unit 13 can be turned off in time, so that the situations of overcurrent damage and the like caused by overlarge current are avoided, and the safety is further improved.

In one embodiment, the at least part of the circuit state where the first loop is not formed may include: a circuit state in which at least one of the voltage output terminal 15, the first intermediate terminal 16, and the first ground terminal 17 touches a conductor other than the receiving-side module; at least part of the circuit states in which the first loop is not formed may include: and a circuit state in which at least one of the voltage input terminal 24, the second intermediate terminal 25, and the second ground terminal 26 touches a conductor other than the receiving-side module 1.

Furthermore, when the port touches other conductors, the first switch unit 13 can be turned off in time, so that the situations of overcurrent damage and the like caused by overlarge current are avoided, and the safety is further improved.

In one embodiment, the position of the contact corresponding to the first intermediate terminal 16 is at a midpoint between the contact corresponding to the voltage output terminal 15 and the contact corresponding to the first ground terminal 17, and the position of the contact corresponding to the second intermediate terminal 25 is at a midpoint between the contact corresponding to the voltage input terminal 24 and the contact corresponding to the second ground terminal 26.

The distance between the contact corresponding to the voltage output terminal 15 and the contact corresponding to the first ground terminal 17 is generally the same as the distance between the contact corresponding to the voltage input terminal 24 and the contact corresponding to the second ground terminal 26.

If the contact is a metal contact in the interface, a contact meeting the above position requirement can be selected as a contact of the intermediate end, and if the contact is not a contact in the interface, the contact position of the intermediate end can be configured during the hardware design of the contact so as to meet the above position requirement.

Fig. 3 is a second schematic circuit diagram of the embodiment of the present invention when the docking type charging circuit is being docked.

Referring to fig. 3, the first resistor circuit 21 includes a first resistor R1, a first end of the first resistor R1 is connected to the second middle terminal 25, and a second end of the first resistor R1 is grounded together with the second ground terminal 26.

The second resistor line 22 includes a second resistor R2 and a low forward conduction voltage drop diode D1, a first end of the low forward conduction voltage drop diode D1 is connected to the second intermediate end 25, a second end of the low forward conduction voltage drop diode D1 is connected to the voltage input end 24, and the second resistor R2 is connected between the low forward conduction voltage drop diode D1 and the second intermediate end 25 or between the low forward conduction voltage drop diode D1 and the voltage input end 24.

In a specific implementation process, other resistors may be connected in series or in parallel in the first resistor line 21 and the second resistor line 22.

Fig. 4 is a third schematic circuit diagram of the embodiment of the present invention when the docking type charging circuit is being docked.

Referring to fig. 4, the receiving-side module 2 further includes a receiving-side driving unit 28 and a second switch unit 27.

The second switch unit 27 is connected between the voltage input terminal 24 and the battery power supply unit 23, the sampling terminal of the receiving-side driving unit 28 is directly or indirectly connected to the voltage input terminal 24, the output terminal of the receiving-side driving unit 28 is connected to the second switch unit 27, the receiving-side driving unit 28 is configured to compare the voltage of the voltage input terminal with a preset safe voltage interval, and control the on/off of the second switch unit 27 according to a comparison result, where the safe voltage interval is determined according to an overvoltage protection point and a lowest undervoltage protection point of an input voltage, and specifically may be, for example: the lower limit of the safe voltage range is the lowest undervoltage protection point, and the upper limit is the overvoltage protection point.

The receiving-side drive unit 28 can exert a protective action, and therefore, according to its action, can be characterized as: protection Gate Driving or Gate Driving Protection.

In the above embodiment, the receiving-side driving unit compares the voltage at the voltage input terminal with a preset safe voltage interval, and controls the on/off of the second switch unit according to the comparison result, wherein the safe voltage interval is determined according to the overvoltage protection point and the lowest undervoltage protection point of the input voltage. The method can use the safe voltage interval as a reference basis to judge whether the current input voltage is suitable for charging the battery, can avoid the damage to the device caused by charging when the voltage is not suitable for charging, and further improves the effect of safety protection.

In one embodiment, referring to fig. 4, the receiving-side module 2 further includes a capacitor C1, the power supply terminal of the receiving-side driving unit 28 is connected to the first terminal of the capacitor C1, the first terminal of the capacitor C1 is further connected to the second middle terminal 25, and the second terminal of the capacitor C1 and the second ground terminal 26 are grounded together.

Because the power supply end of the receiving side driving unit is connected with the capacitor capable of storing energy, if the accessed circuit module does not have the first middle end, the capacitor cannot be charged to the required voltage, and then the receiving side driving unit cannot implement control under the power supply of the capacitor, so that the receiving side driving unit can be favorable for avoiding being charged by the power supply side module which is not matched, and further avoiding unsafe charging which may be caused.

In one embodiment, referring to fig. 4, the communication port of the receiving-side driving unit 28 is connected to the second intermediate terminal 25, so as to interact with the power-supplying-side module 1 through the second intermediate terminal 25.

The communication port can be characterized as an input/output port, i.e., an I/O port.

Since the communication terminal of the receiving-side driving unit can utilize the second intermediate terminal for interaction, it provides a hardware basis for a command communication mechanism, for example, command interaction is realized when not used for power supply, which can provide a basis for further complicated and various control possibilities and also provide a basis for further security authentication.

The receiving-side driving unit 28 is specifically configured to receive an authentication request sent by the power supply-side driving unit 14 of the power supply-side module 1 or another circuit unit, and return an authentication passing signal in response to the authentication request, so that the power supply-side driving unit 14 of the power supply-side module 1 can control the on/off of the first switch unit according to the authentication passing signal.

Because the communication end of the receiving side driving unit can utilize the second intermediate end to realize the interaction of the authentication request and the authentication passing signal, the adaptation of the power supply side and the receiving side can be further ensured.

In the embodiment shown in fig. 4, in combination with the energy storage function of the capacitor and the energy storage function of the communication terminal, when the receiving-side module is not powered, the receiving-side driving unit can still provide a certain electric energy to ensure the interaction of the interaction command.

In a specific implementation, if the power supply side module 1 needs a higher security authentication requirement for supplying power to the receiving side module 2, the power supply side driving unit 14 or other circuit units of the power supply side module 1 may be configured to send corresponding logic level commands through the first intermediate terminal 16 and the second intermediate terminal 25, which may be understood as an authentication request. The receiving-side driving unit 25 may recognize the logic level command through the communication port and respond, for example, feed back an authentication passing signal, and the power supply-side driving unit 14 may further determine whether the first switching unit 13 needs to be kept turned on according to the received signal, for example, if the authentication passing signal is received, control the first switching unit 13 to be turned on.

Based on the above functions, the reception-side drive unit 25 can be specifically characterized as: protection

Respond Gate Driving。

Fig. 5 is a fourth schematic circuit diagram of the embodiment of the present invention when the docking type charging circuit is being docked.

Referring to fig. 5, the first middle terminal 16 can be represented by Det1, the second middle terminal 25 can be represented by Det2, the first ground terminal 17 can be represented by GND1, and the second ground terminal 26 can be represented by GND 2.

The first switching unit 13 may include a first FET1, which may be an N-channel FET, having a source connected to the voltage output terminal 15, a drain connected to the power source 11, and a gate connected to the power-supply-side driving unit 14.

The second switching unit 27 may include a second FET2, which may be an N-channel FET, having a source connected to the battery supply unit 23, a drain connected to the voltage input terminal 24, and a gate connected to the receiving-side driving unit 28.

In one embodiment, the second switch unit 27 may further include a third FET3, which may be an N-channel FET, having a source connected to the voltage input terminal 24, a drain connected to the battery power supply unit 23, and a gate connected to the receiver-side driving unit 28. The leakage of the internal power supply of the receiving terminal to the voltage input terminal 24 can be prevented by the third FET 3.

In another embodiment, the receiving-side driving unit 28 may be configured with a circuit portion for placing leakage, so that the third FET3 may not be provided.

Fig. 6 is a schematic circuit diagram of an electronic device including a power supply side module according to an embodiment of the present invention.

Referring to fig. 6, the electronic device 3 including the power supply side module 1 includes the power supply side module 1, which can be understood by referring to the embodiments shown in fig. 1 to 5, and can be specifically understood as the power supply side module 1 of the docking type charging circuit therein.

Therefore, the power supply side module 1 may include a power supply 11, a voltage output terminal 15 connected to the power supply 11, and a first ground terminal 17, and the power supply side module 1 further includes a power supply side driving unit 14, an energizing unit 12, a first switching unit 13, and a first intermediate terminal 16.

The power supply unit 12 is connected between the first intermediate terminal 15 and the power supply 11, so as to output a target current by using the first intermediate terminal 16 under the power supply of the power supply 11; the first intermediate terminal 16 is configured to be in butt joint with a second intermediate terminal of a receiving side module of another electronic device, so that when the voltage output terminal 16 is in butt joint with a voltage input terminal of the receiving side module and the first ground terminal 17 is in butt joint with a second ground terminal of the receiving side module, the power applying unit 12, the first intermediate terminal 16, the second intermediate terminal, and a first resistance line of the receiving side module are sequentially conducted with ground to form a first loop.

Optionally, the voltage output end is connected to the second ground end, and when the first ground end is connected to the voltage input end, the energizing unit, the first intermediate end, the second resistance line, and the first ground end are sequentially connected to ground to form a second loop;

at least some circuit states in which the first loop is not formed include at least one of:

forming a circuit state of the second loop;

the first middle end does not form a circuit state of a loop outwards;

a short circuit occurs in at least two of the voltage output terminal, the first intermediate terminal and the first ground terminal;

a circuit state in which at least one of the voltage output terminal, the first intermediate terminal, and the first ground terminal touches a conductor other than the receiving-side module;

a circuit state in which at least two of the voltage input terminal, the second intermediate terminal, and the second ground terminal are short-circuited;

and a circuit state in which at least one of the voltage input terminal, the second intermediate terminal, and the second ground terminal touches a conductor other than the receiving-side module.

In addition, any description of all the embodiments shown in fig. 1 to 5 can be applied to the embodiment shown in fig. 6, and therefore, other repeated technical features and technical effects are not described herein again.

In a specific implementation process, the power supply module 1 may be a circuit module in any one of the following electronic devices: cell-phone, wearable equipment, panel computer, smart television, image acquisition equipment, charger, smart jack. I.e. the electronic device 3 may be any of the above.

Referring to fig. 7, the electronic device 4 including the receiving-side module includes the receiving-side module 2 for supplying power to the power supply-side module 1 of the electronic device, and the receiving-side module 2 includes a battery power supply unit 23, a voltage input terminal 24 connected to the battery power supply unit 23, a second ground terminal 26, a second intermediate terminal 25, a first resistance line 21, a receiving-side driving unit 25, and a second switching unit 24.

The second intermediate terminal 25 is configured to be connected to the first intermediate terminal 16, so as to form the first loop when the voltage output terminal 15 is connected to the voltage input terminal 24, and the first ground terminal 17 is connected to the second ground terminal 26.

The second switch unit 27 is connected between the voltage input end 2 and the battery power supply unit 23, the sampling end of the receiving-side driving unit 28 is directly or indirectly connected to the voltage input end 24, the output end of the receiving-side driving unit 28 is connected to the second switch unit 27, the receiving-side driving unit 28 is configured to compare the voltage of the voltage input end with a preset safe voltage interval, and control the on-off of the second switch unit according to the comparison result, and the safe voltage interval is determined according to an overvoltage protection point and a lowest undervoltage protection point of the input voltage.

In addition, any description of all the embodiments shown in fig. 1 to 5 can be applied to the embodiment shown in fig. 7, and therefore, other repeated technical features and technical effects are not described herein again.

In a specific implementation process, the receiving-side module 2 may be a circuit module in any one of the following electronic devices: cell-phone, wearable equipment, panel computer, smart television, image acquisition equipment, earphone. That is, the electronic device 4 may be any of the above.

To sum up, the utility model provides an among dock charging circuit and the electronic equipment, because the first loop that contains first middle end, second middle end, first resistance circuit etc. can be formed to the side of supply module and accepting side module when just connecing, then does not form the first loop when the reversal connects, the utility model discloses can provide the circuit foundation for just connecing and the judgement of reversal, based on this circuit foundation, can be favorable to avoiding the power supply when the reversal connects and lead to causing the damage to the device in side of supply module and the accepting side module, played positive and negative judgement and the safety protection who corresponds. And simultaneously, the utility model discloses a power supply side drive unit provides the hardware basis for the external selectivity power supply to the control of first switch unit, and it can be favorable to avoiding the emergence of the unsafe power supply situation, has played the safety protection effect that corresponds. For example, in an alternative, if a second loop is formed, the first intermediate end does not form a loop to the outside, a short circuit occurs in a part of the ports, or a part of the ports is in contact with other external conductors which are not adapted, the first switching unit may be controlled to be turned off, so as to avoid charging the modules on the receiving side which are not adapted, or other situations which may cause insecurity.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A butt-joint type charging circuit comprises a power supply side module and a receiving side module which can be mutually butted, wherein the power supply side module comprises a power supply, a voltage output end connected to the power supply and a first grounding end, and the receiving side module comprises a battery power supply unit, a voltage input end connected to the battery power supply unit and a second grounding end;

the receiving side module is characterized by further comprising a power supply side driving unit, a power supply unit, a first switch unit and a first middle end, and the receiving side module further comprises a second middle end, a first resistance circuit and a second resistance circuit;

2. The docking charging circuit of claim 1, wherein the receiving-side module further comprises a second resistive line, the second intermediate terminal is further connected to a first terminal of the second resistive line, and a second terminal of the second resistive line is connected to the voltage input terminal; the voltage output end is in butt joint with the second grounding end, and when the first grounding end is in butt joint with the voltage input end, the power applying unit, the first middle end, the second resistance circuit and the first grounding end are sequentially conducted with the ground to form a second loop.

3. The docking charging circuit of claim 2, wherein the first resistor line comprises a first resistor, a first end of the first resistor is connected to the second middle terminal, and a second end of the first resistor is grounded together with the second ground terminal;

4. A docking charging circuit according to any of claims 1 to 3, wherein said first intermediate terminal corresponding contact is located at a midpoint between said voltage output terminal corresponding contact and said first ground terminal corresponding contact, and said second intermediate terminal corresponding contact is located at a midpoint between said voltage input terminal corresponding contact and said second ground terminal corresponding contact.

5. The docking charging circuit according to any one of claims 1 to 3, wherein the receiving-side module further comprises a receiving-side driving unit and a second switching unit;

6. The docking charging circuit of claim 5, wherein the receiving-side module further comprises a capacitor, the power supply terminal of the receiving-side driving unit is connected to a first terminal of the capacitor, the first terminal of the capacitor is further connected to the second middle terminal, and a second terminal of the capacitor is grounded together with the second ground terminal.

7. A docking charging circuit according to claim 5, wherein the communication port of the receiving side driving unit is connected to the second intermediate terminal for interacting with the power supply side driving unit of the power supply side module or other circuit units using the second intermediate terminal.

8. A docking charging circuit according to any of claims 1 to 3, wherein the power supply side module is a circuit module in any one of the following electronic devices: the system comprises a mobile phone, wearable equipment, a tablet personal computer, a computer, an intelligent television, image acquisition equipment, a charger and an intelligent socket;

9. An electronic device comprises a power supply side module, wherein the power supply side module comprises a power supply, a voltage output end connected to the power supply, and a first grounding end, and is characterized by further comprising a power supply side driving unit, a power supply unit, a first switch unit and a first middle end;

10. An electronic apparatus, comprising a receiving-side module for receiving power from a power-supplying-side module of the electronic apparatus according to claim 8 or 9, the receiving-side module including a battery power-supplying unit, a voltage input terminal connected to the battery power-supplying unit, a second ground terminal, and a second intermediate terminal, a first resistance line, a receiving-side driving unit, and a second switching unit;