Charger circuit

Abstract

The utility model relates to the technical field of charging / discharging circuits, and discloses a chargeable and dischargeable charger circuit, which comprises an interface circuit (100), a master control circuit (200), a charging and discharging circuit (400) and a switching circuit (500), when the master control circuit (200) detects that a mobile phone or an electric appliance to be charged is connected to the interface circuit (100), the switching circuit (500) is touched and controlled to output a trigger signal to the master control circuit (200), and the charging and discharging circuit (400) is connected to the interface circuit (100). And the trigger signal is used for triggering and controlling the main control circuit (200) to control the charging and discharging circuit (400) to work, so that the battery pack discharges the mobile phone or the electric appliance.

Description

Technical Field

[0001] This utility model relates to the field of charging / discharging circuit technology, and more specifically, to a charger circuit. Background Technology

[0002] Chargers are commonly used charging components in electric devices. Currently, most chargers can only charge batteries and cannot reverse charge mobile phones and electrical appliances through the battery pack. Therefore, they cannot meet the needs of customers during power use / charging. In addition, they all need to be charged indoors, which is inconvenient to carry when traveling.

[0003] Therefore, how to adapt to charging different battery packs and reverse charging of mobile phones and electrical appliances has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a charger circuit that can both charge and discharge, addressing the shortcomings of existing technologies that cannot reverse charge mobile phones and electrical appliances through battery packs and thus fail to meet the needs of customers during power use / charging.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a charger circuit, which includes:

[0006] An interface circuit, which is configured within the charger circuit, is used to connect to the component to be charged;

[0007] The main control circuit has one end connected to a signal terminal of the interface circuit, and establishes signal interaction with the interface circuit.

[0008] A charging / discharging circuit, one end of which is connected to one end of the interface circuit, is used to receive the charging current input to the interface circuit or to output the charging current to the interface circuit.

[0009] One signal input terminal of the charging and discharging circuit is connected to one signal output terminal of the main control circuit, and is used to receive the control signal input by the main control circuit.

[0010] A switching circuit, one end of which is connected to an input terminal of the main control circuit;

[0011] When the main control circuit detects that a mobile phone or electrical appliance to be charged is connected to the interface circuit, it touches the switch circuit to output a trigger signal to the main control circuit. The trigger signal is used to trigger the main control circuit to control the charging and discharging circuit to work, so that the battery pack discharges to the mobile phone or electrical appliance.

[0012] In some embodiments, the switching circuit includes at least a first MOSFET, a second MOSFET, and a tactile switch.

[0013] One end of the tactile switch and the source of the second MOS transistor are connected to the output terminal of the power supply circuit.

[0014] The other end of the tactile switch is connected to the gate of the first MOS transistor.

[0015] The drain of the first MOSFET is connected to the gate of the second MOSFET through a thirteenth resistor.

[0016] The drain of the second MOSFET is connected to an input terminal of the main control circuit through a first resistor.

[0017] The source of the first MOSFET is connected to the common terminal.

[0018] In some implementations, the first MOSFET is selected as an N-channel MOSFET.

[0019] The second MOSFET is selected as a P-channel MOSFET.

[0020] In some embodiments, the main control circuit includes at least a main controller.

[0021] One end of the main controller is connected to a signal terminal of the interface circuit, establishing signal interaction with the interface circuit.

[0022] One signal input terminal of the charging / discharging circuit is connected to one signal output terminal of the main controller, and is used to receive the control signal input by the main controller.

[0023] In some embodiments, the charge-discharge circuit includes at least a first high-frequency switching module and a discharge module.

[0024] A signal input terminal of the first high-frequency switching module is connected to a signal output terminal of the main controller, for receiving the control signal input by the main control circuit.

[0025] The output terminal of the first high-frequency switching module is connected to the input terminal of the discharge module.

[0026] The output terminal of the discharge module is connected to the input terminal of the mobile phone or electrical appliance.

[0027] In some embodiments, the charge-discharge circuit further includes a second high-frequency switching module and a charging module.

[0028] A signal input terminal of the second high-frequency switching module is connected to a signal output terminal of the main controller, and is used to receive the control signal input by the main control circuit.

[0029] One end of the second high-frequency switching module is connected to one end of the first high-frequency switching module via the first inductor.

[0030] The output terminal of the second high-frequency switching module is connected to the input terminal of the charging module.

[0031] The output terminal of the charging module is connected to the input terminal of the battery pack.

[0032] In some embodiments, the first high-frequency switching module includes at least a seventh MOSFET and a ninth MOSFET.

[0033] The gate of the seventh MOS transistor is connected to a signal output terminal of the main controller.

[0034] The gate of the ninth MOS transistor is connected to a signal output terminal of the main controller.

[0035] The drain of the seventh MOS transistor and the source of the ninth MOS transistor are connected to one end of the first inductor.

[0036] The source of the seventh MOS transistor is connected to the input terminal of the discharge module.

[0037] The drain of the ninth MOS transistor is connected to the common terminal.

[0038] In some embodiments, the second high-frequency switching module includes at least a sixth MOSFET and an eighth MOSFET.

[0039] The gate of the sixth MOS transistor is connected to a signal output terminal of the main controller.

[0040] The gate of the eighth MOS transistor is connected to a signal output terminal of the main controller.

[0041] The drain of the sixth MOS transistor and the source of the eighth MOS transistor are connected to one end of the first inductor.

[0042] The source of the sixth MOS transistor is connected to the input terminal of the discharge module.

[0043] The drain of the eighth MOS transistor is connected to the common terminal.

[0044] In the charger circuit described in this utility model, the main control circuit detects the interface circuit connected to the component to be charged (such as a battery pack, mobile phone, or electrical appliance). The main control circuit outputs the on / off state of the charging and discharging circuit according to the type of the component to be charged, thereby enabling a single charger to charge the battery pack or the battery pack to discharge (or reverse charge) the mobile phone or electrical appliance. This technical solution can charge different battery packs and can also use different battery packs to discharge the mobile phone and electrical appliance, thus solving the problem in the prior art that chargers cannot reverse discharge (or reverse charge) the battery pack to the mobile phone and electrical appliance. Attached Figure Description

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0046] Figure 1 This is a circuit diagram of an embodiment of the interface circuit provided by this utility model;

[0047] Figure 2 This is a circuit diagram of an embodiment of the power supply circuit provided by this utility model;

[0048] Figure 3 This is a circuit diagram of an embodiment of the main control circuit, charging / discharging circuit and switching circuit provided by this utility model. Detailed Implementation

[0049] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0050] like Figures 1-3 As shown, in the first embodiment of the charger circuit of this utility model, the charger circuit includes an interface circuit 100, a power supply circuit 200, a main control circuit 300, a charging and discharging circuit 400, and a switching circuit 500.

[0051] The interface circuit 100 is equipped with a TYPE-C interface for connecting PD (Product Design) products or battery packs.

[0052] The power supply circuit 200 draws power from the PD product and battery pack, and then outputs a 5V power supply after filtering and voltage regulation.

[0053] The main control circuit 300 has the functions of calculation, signal reception and control signal output;

[0054] The charge / discharge circuit 400 has the functions of input / output fast charging and synchronous buck-boost, and it is used as the charging / discharging circuit for PD products and battery packs.

[0055] The switching circuit 500 is used to output the trigger signal.

[0056] Specifically, the interface circuit 100 is configured within the charger circuit for connecting the component to be charged (such as a mobile phone / tablet / battery pack, etc.).

[0057] Furthermore, one end of the main control circuit 300 is connected to a signal terminal of the interface circuit 100 to establish signal interaction with the interface circuit 100, so as to obtain the type of product currently connected to the interface circuit 100 for charging, and output multiple control signals according to the type of product connected to the interface circuit 100 for charging.

[0058] One end of the charging / discharging circuit 400 is connected to one end of the interface circuit 100, and is used to receive the charging current input to the interface circuit 100 or to output the charging current to the interface circuit 100.

[0059] This can be understood as follows: one end of the charging / discharging circuit 400 is connected to the battery pack, and the other end is connected to the PD product, thus forming a charging / discharging loop between the battery pack and the PD product.

[0060] Furthermore, a signal input terminal of the charge / discharge circuit 400 is connected to a signal output terminal of the main control circuit 300 to receive multiple control signals input from the main control circuit 300;

[0061] One end of the switching circuit 500 is connected to one input end of the main control circuit 300. When the switching circuit 500 is triggered, it can output a high-level trigger signal to the main control circuit 300.

[0062] When the main control circuit 300 detects that a mobile phone or electrical appliance to be charged is connected to the interface circuit 100, the touch switch circuit 500 outputs a trigger signal to the main control circuit 300. This trigger signal is used to trigger the main control circuit 300 to control the charging and discharging circuit 400 to work, so that the battery pack discharges to the mobile phone or electrical appliance.

[0063] For example, when a PD product is connected to the TYPE-C interface, this main control circuit 300 enables the PD product to quickly charge the battery pack via a protocol, forming a charging circuit;

[0064] When the main control circuit 300 detects that a mobile phone or electrical appliance is connected to the TYPE-C interface, the main control circuit 300 discharges from the battery pack to the mobile phone or electrical appliance through the protocol, forming a discharge circuit.

[0065] Using this technical solution, the main control circuit 300 detects the component to be charged (such as a battery pack, mobile phone, or electrical appliance) connected to the interface circuit 100. The main control circuit 300 outputs the on / off state of the charging and discharging circuit 400 according to the type of the component to be charged, thereby enabling a single charger to charge the battery pack or the battery pack to discharge (or reverse charge) the mobile phone or electrical appliance. This technical solution can charge different battery packs and can also use different battery packs to discharge the mobile phone and electrical appliance, thus effectively solving the problem in the prior art that chargers cannot reverse discharge (or reverse charge) the mobile phone and electrical appliance through the battery pack.

[0066] In some implementations, such as Figure 3 As shown, the switching circuit 500 includes at least a first MOSFET Q1, a second MOSFET Q2, and a tactile switch SW2. The first MOSFET Q1 is selected as an N-channel MOSFET, and the second MOSFET Q2 is selected as a P-channel MOSFET, which has the function of switching.

[0067] Specifically, one end of the tactile switch SW2 and the source of the second MOSFET Q2 are connected to the output terminal (corresponding to the 5V terminal) of the power supply circuit 200.

[0068] The other end of the tactile switch SW2 is connected to the gate of the first MOSFET Q1.

[0069] The drain of the first MOSFET Q1 is connected to the gate of the second MOSFET Q2 through the thirteenth resistor R13.

[0070] The drain of the second MOSFET Q2 is connected to an input terminal of the main control circuit 300 through the first resistor R1.

[0071] The source of the first MOSFET Q1 is connected to the common terminal.

[0072] In some implementations, such as Figure 3 As shown, the main control circuit 300 includes at least a main controller U1, which has the functions of calculation, signal reception, and control signal output.

[0073] One end of the main controller U1 (corresponding to pins 34-37) is connected to a signal terminal of the interface circuit 100 (corresponding to CC1, CC2, DMC, DPC). It establishes a communication connection with the interface circuit 100 through this interface, thereby enabling signal interaction.

[0074] One signal input terminal of the charge / discharge circuit 400 is connected to one signal output terminal of the main controller U1 (corresponding to pins 12 / 15 / 16 and 19) to receive multiple control signals input by the main controller U1.

[0075] In some implementations, such as Figure 3 As shown, the charge / discharge circuit 400 includes at least a first high-frequency switching module 410 and a discharge module 420.

[0076] The first high-frequency switching module 410 functions as a switch.

[0077] The discharge module 420 has a filtering function.

[0078] Specifically, a signal input terminal of the first high-frequency switching module 410 is connected to a signal output terminal (corresponding to pins 12 and 15) of the main controller U1, and is used to receive two control signals input from the main control circuit 300.

[0079] The output terminal of the first high-frequency switching module 410 is connected to the input terminal of the discharge module 420.

[0080] The output terminal of the discharge module 420 is connected to the input terminal (corresponding to VBUS) of the mobile phone or electrical appliance.

[0081] In some implementations, such as Figure 3As shown, the charge / discharge circuit 400 also includes a second high-frequency switching module 430 and a charging module 440.

[0082] The second high-frequency switching module 430 functions as a switch.

[0083] The charging module 440 has a filtering function.

[0084] Specifically, a signal input terminal of the second high-frequency switching module 430 is connected to a signal output terminal (corresponding to pins 16 and 19) of the main controller U1, and is used to receive two control signals input from the main control circuit 300.

[0085] One end of the second high-frequency switching module 430 is connected to one end of the first high-frequency switching module 410 through the first inductor L1.

[0086] The output terminal of the second high-frequency switching module 430 is connected to the input terminal of the charging module 440.

[0087] The output of the charging module 440 is connected to the input of the battery pack (corresponding to VBAT).

[0088] In some implementations, such as Figure 3 As shown, the first high-frequency switching module 410 includes at least a seventh MOSFET Q7 and a ninth MOSFET Q9, wherein both the seventh MOSFET Q7 and the ninth MOSFET Q9 are selected as N-channel MOSFETs and have the function of switching;

[0089] Specifically, the gate of the seventh MOSFET Q7 is connected to a signal output terminal (corresponding to pin 12) of the main controller U1 through the twenty-first resistor R21, for receiving a control signal.

[0090] The gate of the ninth MOSFET Q9 is connected to a signal output terminal (pin 15) of the main controller U1 via the twenty-fifth resistor R25, for receiving another control signal.

[0091] The drain of the seventh MOSFET Q7 and the source of the ninth MOSFET Q9 are connected to one end of the first inductor L1.

[0092] The source of the seventh MOSFET Q7 is connected to the input terminal of the discharge module 420.

[0093] The drain of the ninth MOSFET Q9 is connected to the common terminal.

[0094] In some implementations, such as Figure 3 As shown, the second high-frequency switching module 430 includes at least a sixth MOSFET Q6 and an eighth MOSFET Q8, wherein both the sixth MOSFET Q6 and the eighth MOSFET Q8 are selected as N-channel MOSFETs and have the function of switching.

[0095] Specifically, the gate of the sixth MOSFET Q6 is connected to a signal output terminal (corresponding to pin 19) of the main controller U1 through the twenty-second resistor R22, for receiving a control signal.

[0096] The gate of the eighth MOSFET Q8 is connected to a signal output terminal of the main controller U1 through the twenty-sixth resistor R26, for receiving another control signal.

[0097] The drain of the sixth MOSFET Q6 and the source of the eighth MOSFET Q8 are connected to one end of the first inductor.

[0098] The source of the sixth MOSFET Q6 is connected to the input terminal of the discharge module 420.

[0099] The drain of the eighth MOSFET Q8 is connected to the common terminal.

[0100] Specifically, when a PD product is connected to the TYPE-C interface, the main controller U1 uses the protocol to quickly charge the battery pack from the PD product, forming a charging circuit.

[0101] When the main controller U1 detects that a mobile phone or electrical appliance (such as a tablet / computer) is connected to the TYPE-C interface, the main controller U1 discharges from the battery pack to the mobile phone or electrical appliance through the protocol, forming a discharge circuit;

[0102] The main controller U1 communicates with external TYPE-C products via the CC1, CC2, DMC, and DPC ports on USB1.

[0103] When the main controller U1 detects that a PD product is connected, the main controller U1 turns on the seventh MOSFET Q7 through the twentieth resistor R21, and then controls the first inductor L1, the eighth MOSFET Q8 and the sixth MOSFET Q6 to work at high frequency through the twenty-sixth resistor R26 and the twenty-second resistor R22, and starts charging the battery pack.

[0104] Among them, the twentieth resistor R20, the nineteenth capacitor C19, the twentieth capacitor C20, the twenty-first capacitor C21, and the twenty-second capacitor C22 form a charging filter and constant current charging circuit.

[0105] When the main controller U1 detects that a mobile phone or electrical appliance is connected, the touch switch SW2 is pressed for 3 seconds and then released. The 5V voltage controls the first MOSFET Q1 to conduct through the fourteenth resistor R14 and the fifteenth resistor R15. The drain and source terminals of the first MOSFET Q1 are shorted to ground.

[0106] Additionally, the ninth resistor R9 and the thirteenth resistor R13 turn on the second MOSFET Q2, and the 5V voltage passes through the DS terminals of the second MOSFET Q2. The first resistor R1 and the third resistor R3 send a high-level trigger signal to the EN pin of the main controller U1. The EN pin of the main controller U1 receives a high-level signal for 3 seconds, and the main controller U1 allows the battery pack to discharge to the mobile phone or electrical appliance.

[0107] In addition, the main controller U1 turns on the sixth MOSFET Q6 through the twenty-second resistor R22, and the output control signal controls the first inductor L1, the ninth MOSFET Q9 and the seventh MOSFET Q7 to work at high frequency through the twenty-first resistor R21 and the twenty-fifth resistor R25, so that the battery pack can discharge to the mobile phone or electrical appliance.

[0108] Among them, the eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11, the nineteenth resistor R19, the fifteenth capacitor C15, and the sixteenth capacitor C16 form a discharge filter and discharge constant current circuit.

[0109] In addition, the main controller U1 can be configured through software or through external hardware. For example, the charging and discharging current can be set to 0.3~3A through software, or it can be set through hardware to protect the system when the maximum temperature exceeds 60 degrees when RT1=10K.

[0110] The seventh resistor, R7 = 9.1K, sets the voltage of each battery cell to 4.2V;

[0111] The fifth resistor R5=13K is set to a maximum power input and output power of 65W;

[0112] The sixth resistor R6=13K sets the number of battery cells in the pack to 5, which fully meets the customer's needs.

[0113] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A charger circuit, characterized in that, have: An interface circuit, which is configured within the charger circuit, is used to connect to the component to be charged; The main control circuit has one end connected to a signal terminal of the interface circuit, and establishes signal interaction with the interface circuit. A charging / discharging circuit, one end of which is connected to one end of the interface circuit, is used to receive the charging current input to the interface circuit or to output the charging current to the interface circuit. One signal input terminal of the charging and discharging circuit is connected to one signal output terminal of the main control circuit, and is used to receive the control signal input by the main control circuit. A switching circuit, one end of which is connected to an input terminal of the main control circuit; When the main control circuit detects that a mobile phone or electrical appliance to be charged is connected to the interface circuit, it touches the switch circuit to output a trigger signal to the main control circuit. The trigger signal is used to trigger the main control circuit to control the charging and discharging circuit to work, so that the battery pack discharges to the mobile phone or electrical appliance.

2. The charger circuit according to claim 1, characterized in that, The switching circuit includes at least a first MOSFET, a second MOSFET, and a tactile switch. One end of the tactile switch and the source of the second MOS transistor are connected to the output terminal of the power supply circuit. The other end of the tactile switch is connected to the gate of the first MOS transistor. The drain of the first MOSFET is connected to the gate of the second MOSFET through a thirteenth resistor. The drain of the second MOSFET is connected to an input terminal of the main control circuit through a first resistor. The source of the first MOSFET is connected to the common terminal.

3. The charger circuit according to claim 2, characterized in that, The first MOSFET is selected as an N-channel MOSFET. The second MOSFET is selected as a P-channel MOSFET.

4. The charger circuit according to claim 2, characterized in that, The main control circuit includes at least a main controller. One end of the main controller is connected to a signal terminal of the interface circuit, establishing signal interaction with the interface circuit. One signal input terminal of the charging / discharging circuit is connected to one signal output terminal of the main controller, and is used to receive the control signal input by the main controller.

5. The charger circuit according to claim 4, characterized in that, The charge-discharge circuit includes at least a first high-frequency switching module and a discharge module. A signal input terminal of the first high-frequency switching module is connected to a signal output terminal of the main controller, for receiving the control signal input by the main control circuit. The output terminal of the first high-frequency switching module is connected to the input terminal of the discharge module. The output terminal of the discharge module is connected to the input terminal of the mobile phone or electrical appliance.

6. The charger circuit according to claim 5, characterized in that, The charging and discharging circuit also includes a second high-frequency switching module and a charging module. A signal input terminal of the second high-frequency switching module is connected to a signal output terminal of the main controller, and is used to receive the control signal input by the main control circuit. One end of the second high-frequency switching module is connected to one end of the first high-frequency switching module via the first inductor. The output terminal of the second high-frequency switching module is connected to the input terminal of the charging module. The output terminal of the charging module is connected to the input terminal of the battery pack.

7. The charger circuit according to claim 6, characterized in that, The first high-frequency switching module includes at least a seventh MOSFET and a ninth MOSFET. The gate of the seventh MOS transistor is connected to a signal output terminal of the main controller. The gate of the ninth MOS transistor is connected to a signal output terminal of the main controller. The drain of the seventh MOS transistor and the source of the ninth MOS transistor are connected to one end of the first inductor. The source of the seventh MOS transistor is connected to the input terminal of the discharge module. The drain of the ninth MOS transistor is connected to the common terminal.

8. The charger circuit according to claim 6, characterized in that, The second high-frequency switching module includes at least a sixth MOSFET and an eighth MOSFET. The gate of the sixth MOS transistor is connected to a signal output terminal of the main controller. The gate of the eighth MOS transistor is connected to a signal output terminal of the main controller. The drain of the sixth MOS transistor and the source of the eighth MOS transistor are connected to one end of the first inductor. The source of the sixth MOS transistor is connected to the input terminal of the discharge module. The drain of the eighth MOS transistor is connected to the common terminal.

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