CN217135190U - Charging detection circuit, charging control circuit, charging circuit and charging seat - Google Patents
Charging detection circuit, charging control circuit, charging circuit and charging seat Download PDFInfo
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- CN217135190U CN217135190U CN202220460502.2U CN202220460502U CN217135190U CN 217135190 U CN217135190 U CN 217135190U CN 202220460502 U CN202220460502 U CN 202220460502U CN 217135190 U CN217135190 U CN 217135190U
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Abstract
The utility model discloses a charge detection circuit, charge control circuit, charging circuit and charging seat, charge detection circuit includes detection signal transmitting unit, low pressure detection power supply module, detection signal receiving module, the interface module that charges, current detection unit and ground connection unit, after detection signal receiving module and the interface module that charges are parallelly connected, establish ties between low pressure detection power supply module and the ground connection unit; the detection signal receiving module is used for judging the connection condition of the charging interface module and the external charging equipment according to the received signal amplitude. According to the technical scheme, the detection circuit is incorporated into the positive electrode and the negative electrode of the charging interface, the detection circuit is controlled by the low-voltage pulse signal, the connection condition of the charging interface is detected, the safety is higher, and the power consumption is reduced.
Description
Technical Field
The utility model relates to an electronic integrated circuit technical field, concretely relates to charging detection circuitry, charge control circuit, charging circuit and charging seat.
Background
The existing product has the structural characteristics that the charging seats adopting the IR navigation recharging function basically continuously output the charging voltage, certain potential safety hazards exist, for example, the voltage is generally more than 12V, the charging interfaces are easy to discharge and ignite instantly when in contact with the charging interfaces, the charging interfaces are also easy to touch metal to cause short circuit, and pets are also easy to get electric shock by mistake.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model discloses a detection circuitry charges, charge control circuit, charging circuit and charging seat have the security higher and reduce functions such as consumption. The specific technical scheme is as follows:
a charging detection circuit comprises a detection signal transmitting unit, a low-voltage detection power supply module, a detection signal receiving module, a charging interface module, a current detection unit and a grounding unit, wherein the detection signal receiving module is connected in parallel with the charging interface module and then connected in series between the low-voltage detection power supply module and the grounding unit; the detection signal transmitting unit is used for transmitting a pulse signal to control the low-voltage detection power supply module to supply power to the detection signal receiving module and the charging interface module; the current detection unit is used for detecting the charging current of the charging interface module when the charging interface module supplies power to the external charging equipment; the detection signal receiving module is used for judging the connection condition of the charging interface module and the external charging equipment according to the received signal amplitude.
Furthermore, the connection condition of the charging interface module and the external charging equipment at least comprises normal connection, disconnection and short circuit of the charging interface module.
Further, the low-voltage detection power supply module includes low-voltage power supply input unit, double diode D9 and MOS pipe Q14 that connect gradually, double diode D9 is used for carrying out the current protection to low-voltage power supply input unit, MOS pipe Q14's grid passes through resistance R32 and links to each other with the detection signal transmitting unit, and the drain electrode links to each other with double diode D9, and the source electrode passes through resistance R24 and detection signal receiving module and links to each other with the interface module that charges.
Further, the detection signal receiving module comprises a resistor R25, a resistor R31 and a detection signal receiving unit, the resistor R25 and the resistor R31 are arranged in series, the resistor R25 is connected with the resistor R24, the resistor R31 is connected with a grounding unit, and the detection signal receiving unit is arranged between the resistor R25 and the resistor R31 and used for detecting the voltage amplitude of the resistor R31.
Further, the interface module that charges is including the interface unit that charges, the interface positive pole unit that charges, the interface negative pole unit that charges, diode D4 and resistance R28, the interface positive pole unit that charges, the interface unit that charges and the interface negative pole unit that charges connect gradually the setting, interface unit one end that charges links to each other with resistance R24 and resistance R25, and the other end passes through resistance R28 and links to each other with ground connection unit GND, and the other end still links to each other with the current detection unit through resistance R27, diode D4 and the parallelly connected setting of resistance R28.
The charging control circuit comprises a charging power supply module, a charging control signal module, a charging interface positive electrode unit and a grounding unit, wherein the charging power supply module is respectively connected with the charging control signal module and the charging interface positive electrode unit, the charging control signal module is connected with the grounding unit, and the charging control signal module is used for controlling the charging power supply module to supply power for the charging interface positive electrode unit.
Further, the charging power supply module includes power supply unit, resistance R3, MOS pipe Q5, power supply unit links to each other with MOS pipe Q5's source electrode, resistance R3 one end links to each other with power supply, and the other end links to each other with MOS pipe Q5's grid, MOS pipe Q5's drain electrode links to each other with the interface positive pole unit that charges, and the drain electrode passes through resistance R4 and links to each other with the control signal module that charges.
Further, the charging control signal module comprises a control signal transmitting unit, a resistor R5, a resistor R6 and a transistor Q13, wherein the control signal transmitting unit is connected with a base of the transistor Q13 through a resistor R5 and is connected with a grounding unit through a resistor R6, a collector of the transistor Q13 is connected with the resistor R4, and an emitter of the transistor Q13 is connected with the grounding unit.
A charging circuit comprises a controller, the charging control circuit and the charging detection circuit, wherein the controller is respectively connected with a detection signal transmitting unit, a detection signal receiving unit, a current detection unit and a control signal transmitting unit.
A charging seat comprises the charging circuit.
Compared with the prior art, the beneficial effects of the utility model reside in that: according to the technical scheme, the detection signal transmitting unit controls the low-voltage detection power supply module to be switched on and off by sending the pulse signal, a voltage amplitude is generated between the detection signal receiving module and the charging interface module, and then the connection condition of the charging interface module and external charging equipment is judged according to the voltage amplitude condition received by the detection signal receiving module, so that power is supplied or cut off to the charging interface module, the use power consumption is reduced, and the use safety is improved; the charging process state is monitored in real time through the current detection unit, and when the charging output is abnormal, or the charging equipment cannot be charged for a long time due to the fault of a charging circuit or a battery, or the charging current is too large or too small (the charging state is reached), the charging voltage output can be timely intervened and interrupted.
Drawings
Fig. 1 is a schematic structural diagram 1 of a charge detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram 2 of a charge detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram 3 of a charge detection circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a charging control circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a current detecting unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, operations, and/or components, but do not preclude the presence or addition of one or more other features, operations, or components. All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
As shown in fig. 1, the charging detection circuit comprises a detection signal transmitting unit charge _ EN1, a low-voltage detection power supply module, a detection signal receiving module, a charging interface module, a CURRENT detection unit CURRENT _ DET and a grounding unit GND, wherein the detection signal receiving module is connected in parallel with the charging interface module and then connected in series between the low-voltage detection power supply module and the grounding unit GND; the detection signal transmitting unit CHARGER _ EN1 is used for transmitting a pulse signal to control the low-voltage detection power supply module to supply power to the detection signal receiving module and the charging interface module; the CURRENT detection unit CURRENT _ DET is used for detecting the charging CURRENT of the charging interface module when the charging interface module supplies power to the external charging equipment; the detection signal receiving module is used for judging the connection condition of the charging interface module and the external charging equipment according to the received signal amplitude. The unit is a functional unit formed by electronic components or chips.
As one embodiment, the connection condition of the charging interface module and the external charging device at least includes normal connection, disconnection and short circuit of the charging interface module.
As an embodiment, the low-voltage detection power supply module includes a low-voltage power supply input unit VCC, a double diode D9 and a MOS transistor Q14, which are connected in sequence, the double diode D9 is used for performing current protection on the low-voltage power supply input unit VCC, a gate of the MOS transistor Q14 is connected to a detection signal transmitting unit charge _ EN1 through a resistor R32, a drain of the MOS transistor Q14 is connected to the double diode D9, and a source of the MOS transistor Q14 is connected to the detection signal receiving module and the charging interface module through a resistor R24. Preferably, the detection signal transmitting unit transmits a 3.3V pulse signal.
As one example, the detection signal receiving module includes a resistor R25, a resistor R31, and a detection signal receiving unit V _ ID, the resistor R25 and the resistor R31 are arranged in series, the resistor R25 is connected to the resistor R24, the resistor R31 is connected to the ground unit GND, and the detection signal unit is arranged between the resistor R25 and the resistor R31 and is used for detecting the voltage amplitude of the resistor R31.
As one of the embodiments, the charging interface module includes a charging interface unit J2, a charging interface positive electrode unit DOCK _ POWER, a charging interface negative electrode unit DOCK _ GND, a diode D4 and a resistor R28, the charging interface positive electrode unit DOCK _ POWER, the charging interface unit J2 and the charging interface negative electrode unit DOCK _ GND are sequentially connected and set, one end of the charging interface unit is connected with the resistor R24 and the resistor R25, the other end of the charging interface unit is connected with the ground connection unit GND through the resistor R28, the other end of the charging interface unit is further connected with the CURRENT detection unit CURRENT _ DET through the resistor R27, and the diode D4 and the resistor R28 are connected in parallel.
The utility model provides a charging control circuit, charging control circuit includes charging source module, charging control signal module, the interface positive electrode unit DOCK _ POWER that charges and ground connection unit GND, charging source module links to each other with charging control signal module and the interface positive electrode unit DOCK _ POWER that charges respectively, charging control signal module links to each other with ground connection unit GND, charging control signal module is used for controlling the POWER supply module that charges for interface positive electrode unit DOCK _ POWER that charges.
As one embodiment, the charging POWER supply module includes a POWER supply unit, a resistor R3, and a MOS transistor Q5, where the POWER supply unit is connected to the source of the MOS transistor Q5, one end of the resistor R3 is connected to the POWER supply, the other end is connected to the gate of the MOS transistor Q5, the drain of the MOS transistor Q5 is connected to the charging interface positive electrode unit DOCK _ POWER, and the drain is connected to the charging control signal module through the resistor R4.
As an embodiment, the charging control signal module includes a control signal transmitting unit, a resistor R5, a resistor R6, and a transistor Q13, the control signal transmitting unit is connected to a base of the transistor Q13 through a resistor R5, and is connected to a ground unit GND through a resistor R6, a collector of the transistor Q13 is connected to the resistor R4, and an emitter of the transistor Q13 is connected to the ground unit GND.
A charging circuit comprises a controller, the charging control circuit and the charging detection circuit, wherein the controller is respectively connected with a detection signal transmitting unit CHARGER _ EN1, a detection signal receiving unit V _ ID, a CURRENT detection unit CURRENT _ DET and a control signal transmitting unit.
A charging seat comprises the charging circuit.
As shown in fig. 2, after the charging dock is powered on and operates, the charging dock continuously sends a pulse signal to the charging detection circuit through the detection signal transmitting unit charge _ EN1, and the MOS transistor Q14 receives the high-low level of the pulse signal to turn on or off the low-voltage power supply input unit VCC, so that the low-voltage power supply input unit VCC intermittently supplies power to the detection signal receiving module and the charging interface module. When the charging interface unit J2 is properly connected to the external charging device, the following two loops can be formed in the circuit: (1) CHARGER _ EN1 → Q14 → R24 → DOCK _ POWER → J2 → DOCK _ GND → R28 → GND; (2) CHARGER _ EN1 → Q14 → R24 → R25 → R31 → GND.
As can be seen from the figure, the charging interface module is connected in parallel with the detection signal receiving module and then connected in series with R24. Therefore, when the load to be charged is correctly connected to the charging circuit, J2 is equivalent to a resistor, and the amplitude of the signal detected by the detection signal receiving unit V _ ID satisfies the following voltage division formula: parallel network equivalent resistance R = ((J2+ R28) × (R25+ R31))/(J2 + R28+ R25+ R31), signal amplitude bit of the detection signal receiving unit V _ ID: v _ ID = VCC (R/(R24 + R)). R31/(R25 + R31).
And the detection signal receiving unit V _ ID detects the pulse signal with the same period and the amplitude reduced according to the voltage division ratio. The external charging equipment can be judged to be correctly connected with the charger, and the power-on operation can be carried out.
As an example, when the charging interface unit J2 is short-circuited, the equivalent resistance of J2 is 0, and the amplitude of the signal detected by the detection signal receiving unit V _ ID satisfies the following voltage division formula: parallel network equivalent resistance R = (R28 = (R25+ R31))/(R28 + R25+ R31), and the V _ ID signal amplitude of the detection signal receiving unit V _ ID is: v _ ID = VCC (R/(R24 + R)) -R31/(R25 + R31).
When the detection signal receiving unit V _ ID detects the pulse signal with the same period and the amplitude reduced according to the voltage division ratio. It can be determined that the charging network is short-circuited and is not operable to be energized.
As shown in fig. 3, if the external charging device is not correctly connected to the charging dock, the charging interface module cannot form a complete loop. The pulse wave signal sent by charge _ EN1 propagates along the following loop: CHARGER _ EN1 → Q14 → R24 → R25 → R31 → GND; the pulse amplitude value detected by V _ ID of the detection signal receiving unit V _ ID is V _ ID = VCC × R31/(R24+ R25+ R31)). Then it can be determined that no external charging device is connected to the charging base for power-off protection operation.
As shown IN fig. 4, POWER _ IN is a POWER supply unit, and DOCK _ POWER is a charging interface positive electrode unit DOCK _ POWER. When the POWER-on condition is met, the controller controls the control signal emitting unit CHARGER _ EN to output a high level, the triode Q13 is conducted, the MOS tube Q5 is controlled to be conducted, the POWER supply unit POWER _ IN supplies POWER to the charging interface positive electrode unit DOCK _ POWER, and charging is started. When no external charging equipment is detected to be connected to the charging seat, the control signal transmitting unit CHARGER _ EN outputs low level, the triode Q13 is cut off, and therefore the MOS transistor Q5 is controlled to be disconnected, and the power supply stops outputting.
As shown in fig. 5, the charging network in the charging process has the following loops: DOCK _ POWER → DOCK _ GND → R28 → GND. The CURRENT detection unit CURRENT _ DET thus detects a voltage value V = I × R28, i.e. a charging CURRENT I = V/R28. And when the charging current is detected to exceed the system threshold, the charger executes an overcurrent protection program to control the disconnection of the output current of the charging interface module.
Compared with the prior art, the beneficial effects of the utility model reside in that: according to the technical scheme, the detection signal transmitting unit controls the low-voltage detection power supply module to be switched on and off by sending the pulse signal, a voltage amplitude is generated between the detection signal receiving module and the charging interface module, and then the connection condition of the charging interface module and external charging equipment is judged according to the voltage amplitude condition received by the detection signal receiving module, so that power is supplied or cut off to the charging interface module, the use power consumption is reduced, and the use safety is improved; the charging process state is monitored in real time through the current detection unit, and when the charging output is abnormal, or the charging equipment cannot be charged for a long time due to the fault of a charging circuit or a battery, or the charging current is too large or too small (the charging state is reached), the charging voltage output can be timely intervened and interrupted.
The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the above embodiments are not described, but should be considered as within the scope of the present specification as long as there is no contradiction between the combinations of the features.
The above embodiments are merely illustrative of the several embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.
Claims (10)
1. A charging detection circuit is characterized by comprising a detection signal transmitting unit, a low-voltage detection power supply module, a detection signal receiving module, a charging interface module, a current detection unit and a grounding unit, wherein the detection signal receiving module is connected in parallel with the charging interface module and then connected in series between the low-voltage detection power supply module and the grounding unit;
the detection signal transmitting unit is used for transmitting a pulse signal to control the low-voltage detection power supply module to supply power to the detection signal receiving module and the charging interface module;
the current detection unit is used for detecting the charging current of the charging interface module when the charging interface module supplies power to the external charging equipment;
the detection signal receiving module is used for judging the connection condition of the charging interface module and external charging equipment according to the received signal amplitude.
2. The charging detection circuit of claim 1, wherein the connection condition of the charging interface module and the external charging device at least comprises normal connection, disconnection and short circuit of the charging interface module.
3. The charging detection circuit of claim 1, wherein the low voltage detection power supply module comprises a low voltage power supply input unit, a double diode D9 and a MOS transistor Q14 connected in sequence, the double diode D9 is used for current protection of the low voltage power supply input unit, a gate of the MOS transistor Q14 is connected to the detection signal transmitting unit through a resistor R32, a drain of the MOS transistor Q14 is connected to the double diode D9, and a source of the MOS transistor Q24 is connected to the detection signal receiving module and the charging interface module through a resistor R24.
4. The charging detection circuit of claim 3, wherein the detection signal receiving module comprises a resistor R25, a resistor R31 and a detection signal receiving unit, the resistor R25 and the resistor R31 are arranged in series, the resistor R25 is connected with the resistor R24, the resistor R31 is connected with a grounding unit, and the detection signal unit is arranged between the resistor R25 and the resistor R31 and is used for detecting the voltage amplitude of the resistor R31.
5. The charging detection circuit of claim 3, wherein the charging interface module comprises a charging interface unit, a charging interface positive electrode unit, a charging interface negative electrode unit, a diode D4 and a resistor R28, the charging interface positive electrode unit, the charging interface unit and the charging interface negative electrode unit are sequentially connected and arranged, one end of the charging interface unit is connected with the resistor R24 and the resistor R25, the other end of the charging interface unit is connected with the ground unit GND through the resistor R28, the other end of the charging interface unit is further connected with the current detection unit through the resistor R27, and the diode D4 and the resistor R28 are connected in parallel.
6. The charging control circuit is characterized by comprising a charging power supply module, a charging control signal module, a charging interface positive electrode unit and a grounding unit, wherein the charging power supply module is respectively connected with the charging control signal module and the charging interface positive electrode unit, the charging control signal module is connected with the grounding unit, and the charging control signal module is used for controlling the charging power supply module to supply power for the charging interface positive electrode unit.
7. The charging control circuit of claim 6, wherein the charging power supply module comprises a power supply unit, a resistor R3 and a MOS transistor Q5, the power supply unit is connected with a source electrode of the MOS transistor Q5, one end of the resistor R3 is connected with a power supply, the other end of the resistor R3 is connected with a gate electrode of the MOS transistor Q5, a drain electrode of the MOS transistor Q5 is connected with the charging interface positive electrode unit, and the drain electrode is connected with the charging control signal module through the resistor R4.
8. The charging control circuit of claim 7, wherein the charging control signal module comprises a control signal transmitting unit, a resistor R5, a resistor R6 and a transistor Q13, the control signal transmitting unit is connected to a base of a transistor Q13 through a resistor R5 and to a ground unit through a resistor R6, a collector of the transistor Q13 is connected to a resistor R4, and an emitter of the transistor Q13 is connected to the ground unit.
9. A charging circuit, characterized in that the charging circuit comprises a controller, the charging control circuit of any one of claims 6 to 8 and the charging detection circuit of any one of claims 1 to 5, the controller being connected to the detection signal transmitting unit, the detection signal receiving unit, the current detection unit and the control signal transmitting unit, respectively.
10. A charging cradle, characterized in that it comprises a charging circuit as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220460502.2U CN217135190U (en) | 2022-03-04 | 2022-03-04 | Charging detection circuit, charging control circuit, charging circuit and charging seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220460502.2U CN217135190U (en) | 2022-03-04 | 2022-03-04 | Charging detection circuit, charging control circuit, charging circuit and charging seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217135190U true CN217135190U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220460502.2U Active CN217135190U (en) | 2022-03-04 | 2022-03-04 | Charging detection circuit, charging control circuit, charging circuit and charging seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217135190U (en) |
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2022
- 2022-03-04 CN CN202220460502.2U patent/CN217135190U/en active Active
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