CN211296239U - Multi-port adaptive charging and discharging mobile power circuit and mobile power - Google Patents

Abstract

The utility model discloses a multiport self-adaptation charge-discharge portable power source's circuit and controller, this control circuit includes: a main control MCU; the two DRP charging ports are coupled and electrically connected with the quick charging detection module, and each DRP charging port is also electrically connected with the battery cell through the switch unit and the main switch unit which are connected in series; a rapid charging detection module electrically connected with the DRP charging port and the switch unit and passing through I²The data bus C is electrically connected with the master control MCU; a voltage conversion unit electrically connected with the battery cell through the main switch unit and passing through I²The data bus C is coupled and electrically connected with the main control MCU; a synchronous buck converter electrically connected to the charging USB port and connected to the main control MCU, the voltage conversion unit andthe battery core is electrically connected in a coupling mode, the power supply unit is electrically connected with the battery core and the DRP charging port. The novel charger can be connected to a USB-C port, a USB-C port is connected to charging equipment supporting quick charging, and quick charging Bypass mode charging is carried out between the two USB-C ports.

Description

Multi-port adaptive charging and discharging mobile power circuit and mobile power

technical field

The utility model relates to the technical field of mobile power supplies, in particular to a circuit of a multi-port self-adaptive charging and discharging mobile power supply and a mobile power supply.

Background technique

Nowadays, due to the versatility of the USB-C interface, USB-C has been widely used in consumer electronic products, and Power Delivery based on the USB-C interface type has also been adopted in many products, and has begun to gradually replace the previous The Micro USB socket, so the corresponding mobile power products also use USB-C and PD technology in large numbers.

However, the existing power bank usually has only one USB-C port, and the other output ports are Micro or USB-A, etc., and only one USB-C port supports PD input and output, and there is no PD pass-through function.

Therefore, in the absence of a better technical solution in the related technical field, a circuit of a multi-port adaptive charging and discharging mobile power supply and a mobile power supply are provided, which can better facilitate users to use the mobile power supply.

Utility model content

The technical problem to be solved by the utility model is to provide a circuit and a mobile power supply for a multi-port self-adaptive charging and discharging mobile power supply, which can realize the connection of a fast charging charger in a USB-C port, aiming at the defects existing in the existing design technology. , a USB-C port is connected to a charging device that supports fast charging, and the fast charging Bypass mode is implemented between the two USB-C ports.

According to the first aspect of the present utility model, the technical solution adopted by the present utility model is as follows: a circuit for a multi-port self-adaptive charging and discharging mobile power supply, comprising:

The main control MCU is used to control the work of the mobile power supply;

Two DRP charging ports, the two DRP charging ports are both coupled and electrically connected to the fast charging detection module, and each of the DRP charging ports is also electrically connected to the battery cell through a series-connected switch unit and a general switch unit for external charging The charger or charging device is electrically connected and charges the power bank and/or powers the charging device;

The fast charging detection module is electrically connected to the matching DRP charging port and the matching switching unit, and the fast charging detection module is also electrically connected to the main control MCU through the I ² C data bus coupling, for identifying access to the DRP The external charger and/or equipment of the charging port and the switch of the switch unit controlled by the control of the main control MCU;

The voltage conversion unit is electrically connected to the battery cell through the main switch unit, and the voltage conversion unit is also electrically connected to the main control MCU through the I ² C data bus coupling, for controlling the switch of the main switch unit, and/or converting the output for the DRP The charging voltage of the charging device electrically connected to the charging port;

The synchronous step-down converter is electrically connected to the charging USB port, and is electrically coupled to the main control MCU, the voltage conversion unit and the battery cell, and is used to convert the power input from the voltage conversion unit or the battery cell to +5V output;

The power supply unit is electrically connected to the battery cell and the DRP charging port, and is used to stabilize the voltage delivered by the battery cell and the DRP charging port as a power supply for the main control MCU to work.

As a further elaboration on the above technical solutions:

In the above technical solution, the model of the main control MCU is STM32F030.

In the above technical solution, the fast charging detection module is composed of SC2001 fast charging protocol chip and peripheral resistance and capacitance.

In the above technical solution, the voltage conversion unit is composed of a buck-boost chip SS8812 and peripheral resistors and capacitors.

In the above technical solution, the synchronous buck converter is an SC8102 synchronous buck converter chip.

In the above technical solution, the power supply unit includes a voltage regulator chip SGM2203, the input end of the voltage regulator chip SGM203 is electrically connected to the positive electrode of the battery cell and the positive port of the two DRP charging ports, and the output of the voltage regulator chip SGM203 The port is electrically connected to the power port of the main control MCU.

In the above technical solution, each of the switch units includes two switch MOS transistors that are electrically connected in sequence, and the source of one of the two switch MOS transistors is set as the input end of the switch unit and is electrically connected to the The positive port of the DRP charging port, the source of the other switch MOS transistor is set as the output port of the switch unit and is electrically connected to the main switch unit and the voltage conversion unit, and the gates of the two switch MOS transistors are set to It is the control port of the switch unit and is electrically connected to the gate gate control port of the fast charge detection module, and the drains of the two switch MOS transistors are electrically connected to each other.

In the above technical solution, the main switch unit includes a switch input branch composed of a first switch MOS tube and a second switch MOS tube coupled and electrically connected, and a switch input branch composed of a third switch MOS tube and a fourth switch MOS tube coupled and electrically connected The switch output branch of ; among them,

The drains of the first switch MOS transistor and the third switch MOS transistor are respectively set as the total input terminal and the total output terminal of the total switch unit, and the total input terminal is electrically connected to the output terminals of the two switch units, The total output terminal is coupled and electrically connected to the battery cell and the synchronous step-down converter, and the total output terminal is also coupled and electrically connected to the voltage conversion unit through a series-connected detection resistor, and is electrically coupled to the input battery cell and the synchronous step-down converter. Converter/current detection from cell and synchronous buck converter output;

The source of the first switch MOS transistor is electrically connected to the source of the three-switch MOS transistor through a series inductance,

The source of the first switch MOS transistor is electrically connected to the drain of the second switch MOS transistor, and the gates of the first switch MOS transistor and the second switch MOS transistor are respectively matched with the control ports of the voltage conversion unit electrical connection,

The source of the third switch MOS transistor is electrically connected to the drain of the fourth switch MOS transistor, and the gates of the third switch MOS transistor and the fourth switch MOS transistor are respectively matched with the control ports of the voltage conversion unit electrical connection,

The sources of the second switch MOS transistor and the fourth switch MOS transistor are connected to the ground;

The voltage conversion unit matches the control switch input branch and the switch output branch of the main control MCU to be turned on or off, and matches and converts the output voltage to match.

In the above technical solution, the switch MOS transistor, the first switch MOS transistor, the second switch MOS transistor, the third switch MOS transistor and the fourth switch MOS transistor are all TDM3526 chips.

According to the second aspect of the present utility model, the technical solution adopted by the present utility model is as follows: a mobile power supply, comprising a power supply housing, the power supply housing is provided with a control board, and the control board is provided with the power supply as described in the first aspect. In the circuit of a multi-port self-adaptive charging and discharging mobile power supply, the DRP charging port and the charging USB port are arranged on the power supply housing.

Compared with the prior art, the beneficial effect of the present utility model is that: the present utility model is provided with two USB-C ports, each USB-C port can adaptively identify the charging or discharging mode, and when any USB-C port is When the C port is connected to a fast charging charger, and the other USB-C port is connected to a charging device that supports fast charging, it can cooperate with the control of the main control MCU to realize the BYPASS function of PD power transmission, and speed up the charging speed of external devices and mobile power itself.

Description of drawings

Fig. 1 is the circuit schematic diagram of the multi-port self-adaptive charging and discharging mobile power supply circuit of the present utility model;

Fig. 2 is the internal logic block diagram of the multi-port self-adaptive charging and discharging mobile power supply of the present invention.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

The embodiments described with reference to the accompanying drawings are exemplary, and are intended to explain the present application and should not be construed as a limitation of the present application. In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "top", "bottom", "front", " Rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore It should not be construed as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include one or more of that feature. In the description of this application, "several" and "plurality" mean two or more, unless otherwise expressly and specifically defined. In this application, unless otherwise expressly specified and limited, terms such as "installation", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations. In this application, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature has a lower level than the second feature.

Fig. 1 is the circuit principle diagram of the multi-port self-adaptive charging and discharging mobile power supply circuit of the present invention; Fig. 2 is the internal logic block diagram of the multi-port self-adapting charging and discharging mobile power supply of the present invention. The utility model is provided with two USB-C ports (DRP charging ports), each USB-C port (DRP charging port) can adaptively identify the charging or discharging mode, and when any one of the USB-C ports is connected to the fast charging When the other USB-C port is connected to a charging device that supports fast charging, it can cooperate with the control of the main control MCU to realize the BYPASS function of PD power transmission, and speed up the charging speed of external devices and the mobile power supply itself.

Referring to the accompanying drawings 1-2, the circuit of the multi-port self-adaptive charging and discharging mobile power supply of this embodiment includes:

The main control MCU U6 is used to control the work of the mobile power supply;

Two DRP charging ports (USB2 and USB3), the two DRP charging ports (USB2 and USB3) are both coupled and electrically connected to the fast charging detection module 100, and each of the DRP charging ports (USB2/USB3) is also connected through a series switch The unit 200 and the main switch unit 300 are electrically connected to the battery cell 400 (represented by P in the circuit diagram), and the two DRP charging ports (USB2 and USB3) are used to electrically connect with an external charger or charging device and charge the mobile power supply and/or Charge and supply power for charging devices; both DRP charging ports (USB2 and USB3) can be electrically connected to fast charging chargers, and both can be electrically connected to fast charging devices, and can also be connected to one fast charging charger and the other to fast charging devices. , the BYPASS function of PD power transmission is implemented at this time;

The fast charging detection module 100 is electrically connected to the matching DRP charging port (USB2/USB3) and the matching switching unit 200 (first switching unit 200-1/second switching unit 200-2), the fast charging The detection module 100 is also electrically connected to the main control MCU U6 through the I ² C data bus coupling, for identifying the external chargers and/or devices connected to the DRP charging port (USB2/USB3), and cooperating with the control of the main control MCU U1 While controlling the switch of the switch unit 200 (the first switch unit 200-1/the second switch unit 200-2), in practice, through the handshake protocol, the fast charge detection module 100 can identify whether the DRP charging port (USB2/USB3) is connected to Whether the fast charging charger is a fast charging device, the fast charging detection module 100 identifies the fast charging device and the PD0 of the fast charging charger, and matches to complete the adaptive power matching;

The voltage conversion unit 500 is electrically connected to the battery cell 400 through the main switch unit 300, and the voltage conversion unit 500 is also electrically connected to the main control MCU U6 through the I ² C data bus coupling, for controlling the switch of the main switch unit 300, and / or convert the voltage for charging the charging device electrically connected to the DRP charging port (USB2/USB3);

The synchronous step-down converter U2 is electrically connected to the charging USB port USB1, and is coupled and electrically connected to the main control MCU U6, the voltage conversion unit 500 and the battery cell 400, and is used to input the voltage conversion unit 500 or the battery cell 400 (input to the synchronous drop The power supply of the voltage converter U2's Vin port) is converted to +5V output (output along the charging USB port USB1);

The power supply unit 600 is electrically connected to the battery cell 400 (indicated by P+ in the circuit diagram) and the DRP charging port (corresponding to VBUS-C1 and VBUS-C2 in the circuit diagram), and is used to transmit the battery cell 400 and the DRP charging port (USB2 and USB3) The voltages (P+, VBUS-C1 and VBUS-C2) are regulated as the power supply for the main control MCU U6.

The following three modes of operation of the circuit and the mobile power supply of the present invention will be described with reference to the accompanying drawings 1-2: the three modes include a charging mode, a bypass mode and a discharging mode. 3. Short-circuit and over-current protection: In Bypass mode, if the charged device has an over-current or short-circuit fault, the power system detects (2) that the voltage exceeds the set threshold through (14), and the entire mobile power system will be shut down until the fault is removed.

charging mode

First, the maximum charging power selection

In the charging mode, only one charger (USB2 or USB3) is allowed to be connected to the input, and the charger with the largest input power has priority. If the power of the two chargers is the same, the one connected first will be used.

For example: when there is only one PD charger input (USB2 or USB3), the main control MCU U6 selects the maximum PDO voltage of the charger to charge the mobile power supply. For example, at this time, the charger PDO has 5V/3A 9V/3A 12V /3A 15V/3A, the PD charger will charge the mobile power supply at 15V/3A; when the maximum PDO of the two input PD chargers is set to be the same, the DRP charging port (USB2 or USB3) will be connected first. The USB-C port is the charging input, and the other USB-C port is ignored. If it is connected at the same time, it will be determined by the query order of the main control MCU U6; the PDOs input by the PD chargers of the two inputs are set to be different, regardless of the order. Use the PD charger with the highest PDO power to charge the mobile power supply; for example, the PDO of PD charger A (connected to USB2/USB3) has 5V/3A 9V/3A 15V/3A, and the PD charger B (connected to USB2/USB3) The PDO has 5v/3A 9v/3A15V/2A, then, regardless of the order of insertion, the mobile power supply will always choose PD charger A to charge the device.

Second, the charging process (using a single USB-C port as the input PDO is 12V/3A-9V/3A-5V/3A, the charging path is briefly described)

When the DRP port USB2 is used as the PD12V input, the main control MCU U6 detects the access of the PD charger through the first fast charge detection module 100-1, the mobile power supply wakes up and starts up, the initial voltage of VIN1 is 5V, and the first switch unit 200-1 is closed. , The voltage conversion unit 500 charges the battery cell 400, and the main control MCU U6 handshakes and connects with the external charger through the first fast charge detection module 100-1. The first fast charge detection module 100-1 sends a PDO voltage request, and the external charger is charged The controller provides 12V (Vmax) output according to the requested configuration, which is adjusted to 12V through the voltage conversion of the voltage conversion unit 500 and connected to the current detection resistor 700 to rapidly charge the battery cell 400 with the maximum input power.

Bypass mode:

In Bypass charging mode, when other ports are connected to the device for charging, the Bypass function needs to automatically adjust the PDO of the charger according to the characteristics of the connected device, according to the PDO of the charger and the PDO of the external device, to ensure the maximum effective power Bypass to When charging the device, when the device is fully charged, turn off the output, and then adjust the power of the charger to the available maximum power mode to charge the mobile power supply.

For example: the USB-C port (USB3) is at PD 12V/3A output to charge the charged device, the USB-C port (USB2) is plugged into the PD charger at this time to charge the mobile power supply, and the charger PDO is 5V/3A 9V/3A 12V/3A 15V/3A, then the main control MCU U6 re-handshakes the received charger PDO to the charged device of the USB-C port (USB3), and the main control MCU U6 turns off the voltage conversion unit 500, and the PD charger provides 12V /3A to charge the device being charged.

During the Bypass process, when the PD charging device is unplugged, it will enter the mobile power charging mode. If a new 15V/3A charging device is re-inserted, the main control MCU U6 will send the PD charger's PDO to the charging device. After the charging device responds to the PDO demand, the voltage conversion unit 500 is turned off at the same time, providing 15V/3A to charge the charged device.

When the charged device is fully charged, turn off the output of the USB-C port (USB3); the PDO sent by the main control MCU U6 to the PD charger will be updated with a new handshake, and the mobile power supply will be charged at 15V/3A

A bypass process (a brief description of the bypass path with 5V and PD as output) is as follows:

Assuming that a USB-C port (USB2) is used for PD input, and the USB-C port (USB3) is connected to a charged PD device, after the main control MCU U6 detects the charged device through the second fast charge detection module 100-2, According to the PDO of the external charger connected to the USB-C port (USB2) and the PDO of the externally charged device to the USB-C port (USB3), the PDO of the first fast charge detection module 100-1 is automatically adjusted based on the voltage of the charged device. At this time, the switch of the voltage conversion unit 500 is turned off, and the second switch unit 200-2 is turned on to realize the maximum discharge process of the PD. After the PD is fully charged by the charging device, the second switch unit 200-2 is turned off to switch back to the battery charging mode. ; For example, when the USB-C port (USB2) is used for PD input, the USB-C port (USB3) is connected to a charging 5V device, after the main control MCU U6 detects the charged device through the second fast charging detection module 100-2, according to The USB-C port (USB2) is connected to the PDO of the PD charger and the USB-C port (USB3) is connected to the USB protocol of the charged device. Based on the voltage of the charged device, the PD charger of the USB-C port (USB2) is automatically adjusted. PDO, at this time, the main switch unit 300 is disconnected, and the second switch unit 200-2 is closed to realize the 5V discharge process. After the 5V is fully charged by the charging device, the second switch unit 200-2 is disconnected and switched back to charging the battery (6 )model.

Discharge Mode:

Maximum discharge power selection

In discharge mode, when any one of the USB-C ports (USB2 or USB3) works independently, each USB-C port can be charged or discharged at a maximum of 60W. When two USB-C devices are connected, the system will The PDOs of the two connected devices automatically select the maximum total power PDO output. The general basic principle of power distribution is: the maximum total power output of the two USB-C ports (USB2 or USB3) is not greater than 60W, and at the same time, the total output current Not more than 4A. E.g:

1. The discharge mode has a maximum output power of 60W. When the mobile power supply USB-C (USB2 or USB3) is used as output, it also has its own PDO like a charger, such as 5V/3A 9V/3A 12V/3A 15V/3A 20V/3A , the maximum output power of the PD is 20V/3A in the PDO, and the mobile power supply automatically matches the power of the two output ports to achieve efficient maximum power discharge.

2. When the DRP port (USB2) already has PD powered device A, the PDO currently selected by device A is 20V/3A, and another PD powered device B is connected to the USB-C-2 interface, and the PDO requested by device B Assuming it is 15V/2A, then the PDO sent by the main control MCU U6 to device A will be re-handshaked and updated to 5V/3A 9V/3A 15V/2A 20V/1.5A, then both devices A and B are 15V/2A output;

3. If the first connected power device A chooses 5V/3A instead of 20V/3A, when device B is inserted, the PDO sent by the master MCUU6 handshake will be 5V/3A 9V/3A 15V/3A 20V/ 2A, then take the common voltage as the reference, output 5V to charge the two external devices A and B; Assuming that the external device A is fully charged and the device B is not fully charged, the circuit switch of the device A is disconnected, and the MCU U6 sends the PDO of the device B to be reconnected by handshake. Updated to 5V/3A 9V/3A 15V/3A 20V/2A, charging device B with maximum power 20V/2A.

4. According to the principle of power distribution, when the total power of the two output terminals is > 60W or < 60W, the common PDO voltage is used as the benchmark, and the distribution is based on the principle of average power.

The actual control description of the discharge process:

First, a brief description of the output discharge path of a single USB-C port (USB2/USB3):

In the initial state, the second switch unit 200-2 and the first switch unit 20-1 are in a disconnected state, and the voltage conversion unit 500 is in a no-output state; when a charged device is connected to the USB-C port (USB2), The main control MCU U6 detects that a device is connected through the first fast charging detection module 100-1, and recognizes that it is a charged device (not a charger), that is, turns on the mobile power supply, the voltage conversion unit 500 and the initial safe voltage are 5V, And turn on the first switch unit 200-1 to charge the external charged device; at the same time, the main control MCU U6 shakes hands with the external charged device through the first fast charge detection module 100-1, and if it is a 5V charged device, it will maintain 5V Output, if the PDO of the charged device is 5V/3A 9V/3A 15V/3A, the main control MCU immediately controls the voltage conversion unit 500 to adjust the output voltage to 15V through the control signal, that is, the maximum power output is 15V/3A to charge the device;

When a device is connected to the USB-C port (USB3), the main control MCU U6 detects that a device is connected through the second fast charging detection module 100-2, and recognizes that it is the device to be charged. After the fast charging detection module 100-2 reads that the maximum supported voltage of the connected device PDO is 9V, the main control MCU U6 closes the first switch through the first fast charging detection module 100-1/second fast charging detection module 100-2 The unit 200-1 and the second switch unit 200-2; the main control MCU U6 resets the PDO settings of the first fast charge detection module 100-1 and the second fast charge detection module 100-2, and they are both set to 5V-3A/ 9V-2A, then, the main control MCU U6 controls the output voltage of the voltage conversion unit 500 to be 9V, and turns on the first switch unit 200-1 and the second switch unit 200-2 to charge the externally charged device;

When two devices are connected, the output voltage takes the lower voltage supported by the two devices as the final output voltage

After the charging of one device is completed, turn off the output of this port and reset it to meet the highest voltage output of the remaining two charging devices.

Before explaining the above three modes, the following technical terms are explained: PDO: Power Data Object (PDO) A data object used to represent the output capability of Source and the consumption capability of Sink; PDO automatic adjustment: it is assumed that the device being charged is now The voltage requested in the protocol is 5V, then the "master control MCU" is configured to request 5V voltage from the current charger input terminal (USB2), and this voltage is directly added to the charged device, which is equivalent to the different protocols of the two charging ports passing through The "master control MCU" indirectly transparently transmits and converts the handshake communication between different protocols to achieve the purpose of efficient charging and convenience and freedom.

It can be understood that, in one embodiment, the model of the main control MCU is ST32F030.

It can be understood that, in one embodiment, the fast charging detection module 100 is composed of SC2001 fast charging protocol chip (U1/U5) and peripheral resistors and capacitors.

It can be understood that, in one of the embodiments, the voltage conversion unit 500 is composed of a buck-boost chip SS8812U3 and peripheral resistors and capacitors.

It can be understood that, in one embodiment, the synchronous buck converter U2 is an SC8102 synchronous buck converter chip.

It can be understood that, in one embodiment, the power supply unit 600 includes a voltage regulator chip SGM2203U4, and the input end of the voltage regulator chip SGM203U4 is electrically connected to the positive electrode (P+) of the battery cell 400 and the two DRP charging ports (USB2/ The positive port (VBUS-C1, VBUS-C2) of USB3), the output port of the voltage regulator chip SGM203U4 is electrically connected to the power port VDD of the main control MCUU6.

It can be understood that, in one of the embodiments, each of the switch units 200 (the first switch unit 200-1/the second switch unit 200-2) includes two switch MOS transistors (Q1 and Q4, Q3 and Q5), the source of one of the two switch MOS transistors (Q1/Q3) is set as the input end of the switch unit 200 (the first switch unit 200-1/the second switch unit 200-2) and The positive port (VBUS-C1, VBUS-C2) of the DRP charging port (USB2/USB3) is electrically connected, and the source of the other switch MOS transistor (Q4/Q5) is set as the switch unit 200 (the first switch unit 200-1/the output port of the second switch unit 200-2) is electrically connected to the main switch unit 300 and the voltage conversion unit 500, and the gates of the two switch MOS transistors (Q1 and Q4, Q3 and Q5) The pole is set as the control port of the switch unit 200 (the first switch unit 200-1/the second switch unit 200-2) and is electrically connected to the fast charging detection module 100 (the first fast charging detection module 100-1/the second fast charging detection module 100-1). The gate gate control port (ISO_NGGATE) of the charging detection module 100-2), the drains of the two switch MOS transistors (Q1 and Q4, Q3 and Q5) are connected electrically to each other; Q4, Q3 and Q5) are TDM3526 chips.

It can be understood that, in one of the embodiments, the total switch unit 300 includes a switch input branch formed by the coupling and electrical connection of the first switch MOS transistor Q12 and the second switch MOS transistor Q14, and a switch input branch formed by the third switch MOS transistor Q13 and the second switch MOS transistor Q13. The switch output branch formed by the coupling and electrical connection of the four-switch MOS transistor Q15; wherein,

The drains of the first switch MOS transistor Q12 and the third switch MOS transistor Q13 are respectively set as the total input terminal VBUS and the total output terminal of the total switch unit 300, the total input terminal VBUS and the first switch unit 200- 1 and the output terminal of the second switching unit 200-2 are electrically connected, the total output terminal is coupled and electrically connected to the battery cell 400 and the synchronous buck converter U2, and the total output terminal is also connected to the detection resistor in series R59/R57 is coupled and electrically connected to the voltage conversion unit 500, and detects the current output from the input cell 400 and the synchronous buck converter U2/from the battery cell 400 and the synchronous buck converter U2; the first switch MOS transistor The source of Q12 is electrically connected to the source of the three-switch MOS transistor Q13 through the series inductor L3, the source of the first switch MOS transistor Q12 is electrically connected to the drain of the second switch MOS transistor Q14, and the The gates of a switch MOS transistor Q12 and a second switch MOS transistor Q14 are respectively electrically connected to the control ports (VDRV/LD2) matched with the voltage conversion unit 500, and the source of the third switch MOS transistor Q13 is electrically connected to the voltage conversion unit 500. The drain of the fourth switch MOS transistor Q15 is electrically connected, and the gates of the third switch MOS transistor Q13 and the fourth switch MOS transistor Q15 are electrically connected to the control ports (SW1/HD2) matched with the voltage conversion unit 500, respectively. The sources of the second switch MOS transistor Q14 and the fourth switch MOS transistor Q15 are connected to the ground; the voltage conversion unit 500 matches the control switch input branch and the switch output branch of the main control MCU U1 to be turned on or off, and the matching Convert the output to match the voltage. In this embodiment, the first switch MOS transistor Q12, the second switch MOS transistor Q13, the third switch MOS transistor Q14 and the fourth switch MOS transistor Q15 are all TDM3526 chips.

This embodiment also provides a mobile power supply including a power supply casing (not shown in the figure), the power supply casing is provided with a control board, and the control board is provided with the above-mentioned multi-port adaptive charging and discharging circuit of the mobile power supply. The DRP charging port and the charging USB port are provided on the power supply housing.

It should be noted that, in the present invention, the models of specific devices can also be replaced by other devices with similar functions.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Professional and technical personnel, within the scope of the technical solution of the present invention, make some changes or modifications to equivalent examples of equivalent changes by using the technical content disclosed above, provided that the content of the technical solution of the present invention is not departed from, according to the present invention. The utility model technology refers to any simple modification, equivalent change and modification made to the above embodiments, which all belong to the scope of the technical solution of the present utility model.

Claims (10)

1. A circuit of a multi-port self-adaptive charging and discharging mobile power supply is characterized by comprising:

the main control MCU is used for controlling the mobile power supply to work;

the two DRP charging ports are coupled and electrically connected with the quick charging detection module, and each DRP charging port is also electrically connected with the battery cell through the switch unit and the main switch unit which are connected in series and is used for being electrically connected with an external charger or charging equipment and charging the mobile power supply and/or charging and supplying power to the charging equipment;

the quick charging detection module is electrically connected with the matched DRP charging port and the matched switch unit and also passes through I²The C data bus is electrically connected with the main control MCU in a coupling manner and is used for identifying an external charger and/or equipment accessed to the DRP charging port and controlling the switch of the switch unit in a manner of matching the control of the main control MCU;

the voltage conversion unit is electrically connected with the battery cell through the main switch unit and also connected with the battery cell through the I²The C data bus is electrically connected with the main control MCU in a coupling mode and is used for controlling the on-off of the main switch unit and/or converting voltage for charging the charging equipment electrically connected with the DRP charging port;

the synchronous buck converter is electrically connected with the charging USB port, is electrically connected with the master control MCU, the voltage conversion unit and the battery cell in a coupling manner, and is used for converting a power supply input by the voltage conversion unit or the battery cell into +5V output;

and the power supply unit is electrically connected with the battery cell and the DRP charging port and is used for stabilizing the voltage transmitted by the battery cell and the DRP charging port into a power supply for the master control MCU to work.

2. The circuit of the multi-port adaptive charging and discharging mobile power supply according to claim 1, wherein the master MCU model is ST32F 030.

3. The circuit of the multi-port self-adaptive charging and discharging mobile power supply according to claim 2, wherein the quick charging detection module is composed of an SC2001 quick charging protocol chip and a peripheral resistor capacitor.

4. The circuit of the multi-port adaptive charging and discharging mobile power supply according to claim 2, wherein the voltage conversion unit is composed of a buck-boost chip SS8812 in combination with a peripheral resistor capacitor.

5. The circuit of the multi-port adaptive charging and discharging mobile power supply according to claim 2, wherein the synchronous buck converter is an SC8102 synchronous buck converter chip.

6. The circuit of the multi-port self-adaptive charging and discharging mobile power supply according to claim 2, wherein the power supply unit comprises a voltage stabilizing chip SGM2203, an input end of the voltage stabilizing chip SGM203 is electrically connected to a positive electrode of the battery cell and positive ports of the two DRP charging ports, and an output port of the voltage stabilizing chip SGM203 is electrically connected to a power supply port of the main control MCU.

7. The circuit of the multi-port adaptive charging and discharging mobile power supply according to claim 2, wherein each of the switch units comprises two switch MOS transistors electrically connected in sequence, one of the two switch MOS transistors has a source electrode set as an input terminal of the switch unit and electrically connected to a positive port of the DRP charging port, the other switch MOS transistor has a source electrode set as an output port of the switch unit and electrically connected to the main switch unit and the voltage conversion unit, gate electrodes of the two switch MOS transistors are set as control ports of the switch unit and electrically connected to a gate control port of the fast charging detection module, and drain electrodes of the two switch MOS transistors are electrically connected in a butt joint manner.

8. The circuit of the multi-port self-adaptive charging and discharging mobile power supply according to claim 7, wherein the master switch unit comprises a switch input branch formed by coupling and electrically connecting a first switch MOS transistor and a second switch MOS transistor and a switch output branch formed by coupling and electrically connecting a third switch MOS transistor and a fourth switch MOS transistor; wherein,

the drain electrodes of the first switch MOS tube and the third switch MOS tube are respectively set as a total input end and a total output end of the total switch unit, the total input end is electrically connected with the output ends of the two switch units, the total output end is coupled and electrically connected with the battery cell and the synchronous buck converter, the total output end is also coupled and electrically connected with the voltage conversion unit through a series detection resistor, and the current output by the input battery cell and the synchronous buck converter/the battery cell and the synchronous buck converter is detected;

the source electrode of the first switch MOS tube is electrically connected with the source electrode of the third switch MOS tube through a series inductor,

the source electrode of the first switch MOS tube is electrically connected with the drain electrode of the second switch MOS tube, the grid electrodes of the first switch MOS tube and the second switch MOS tube are respectively and electrically connected with the control port matched with the voltage conversion unit,

the source electrode of the third switch MOS tube is electrically connected with the drain electrode of the fourth switch MOS tube, the grid electrodes of the third switch MOS tube and the fourth switch MOS tube are respectively and electrically connected with the control port matched with the voltage conversion unit,

the source electrodes of the second switch MOS tube and the fourth switch MOS tube are grounded;

the voltage conversion unit is matched with a control switch input branch and a switch output branch of the main control MCU to be connected or disconnected, and matched voltage is output through matching conversion.

9. The circuit of the multi-port self-adaptive charging and discharging mobile power supply according to claim 8, wherein the switch MOS transistor, the first switch MOS transistor, the second switch MOS transistor, the third switch MOS transistor and the fourth switch MOS transistor are all TDM3526 chips.

10. A mobile power supply comprises a power supply shell, wherein a control board is arranged in the power supply shell, and the mobile power supply is characterized in that the control board is provided with the circuit of the multi-port self-adaptive charging and discharging mobile power supply according to any one of claims 1 to 9, and the DRP charging port and the charging USB port are arranged on the power supply shell.

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