Charging and discharging management circuit and mobile power supply

Abstract

This application discloses a charge / discharge management circuit and a power bank, including a first port module, a second port module, a battery access control module, a first DC / DC module, a second DC / DC module, a pass-through module, and a main control module; capable of forming at least one of the following conduction loops: a first conduction loop formed by connecting a first external device to an energy storage battery sequentially through the first port module, the first DC / DC module, and the battery access control module; a second conduction loop formed by connecting a second external device to an energy storage battery sequentially through the second port module, the second DC / DC module, and the battery access control module; and a third conduction loop formed by connecting a first external device to a second external device sequentially through the first port module, the pass-through module, and the second port module. This enables the power bank to meet the application needs of users in more diverse scenarios.

Description

Technical Field

[0001] This application relates to the field of charging and discharging circuit technology, and in particular to a charging and discharging management circuit and a mobile power supply. Background Technology

[0002] Currently, power banks support an increasing number of functions and have more and more ports. Some power banks have two ports, both of which support charging and discharging. In this case, if one port is connected to an external adapter to charge the power bank, while the other port is connected to a load such as a mobile phone to discharge the power bank, the power bank cannot charge and discharge simultaneously. Utility Model Content

[0003] The purpose of this application is to at least solve one of the technical problems existing in the prior art, and to provide a charging and discharging management circuit and a power bank, so that the power bank can meet the application needs of users in more different scenarios.

[0004] In a first aspect, embodiments of this application provide a charge / discharge management circuit, including a first port module, a second port module, a battery access control module, a first DC / DC module, a second DC / DC module, a pass-through module, and a main control module, wherein:

[0005] The first port module is used to connect to a first external device; the second port module is used to connect to a second external device; the battery access control module is used to connect to an energy storage battery; the first DC / DC module is connected between the first port module and the battery access control module; the second DC / DC module is connected between the second port module and the battery access control module; the pass-through module is connected between the first port module and the second port module.

[0006] The main control module is connected to the first port module, the second port module, the battery access control module, the first DC / DC module, the second DC / DC module, and the through module to form at least one of the following conduction loops:

[0007] The first external device is connected to the energy storage battery in a first conducting loop through the first port module, the first DC / DC module and the battery access control module in sequence;

[0008] The second external device is connected to the energy storage battery in a second conduction loop via the second port module, the second DC / DC module, and the battery access control module.

[0009] A third conduction loop is formed by connecting the first external device to the second external device sequentially through the first port module, the pass-through module, and the second port module.

[0010] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: the first port module and the second port module refer to interface modules for connecting external devices, such as Type-C interfaces or USB interfaces; the pass-through module is connected between the first port module and the second port module. When the pass-through module is turned on, the power transmission path between the first port module and the second port module is also turned on. That is to say, when both the first port module and the second port module are connected to external devices, if the pass-through module is turned on, power transmission can be performed between the external devices; therefore, the main control module is communicatively connected to the first port module and the second port module respectively, and detects that the first port module and the second port module are respectively connected to an external charging device and an external load device. In the case where the two port modules are connected to an external power source and an external load respectively, the charging parameters of the external charging device can be obtained through protocol handshake with the external charging device and the external load device. Based on the charging parameters of the external charging device, the power supply capacity of the external charging device can be determined, enabling the external charging device to supply power to the external load device through the direct connection module, thereby achieving simultaneous charging and discharging. Furthermore, the direct power supply of the external charging device to the external load device can also reduce energy loss during the charging and discharging process. In addition, the main control module can also control the charging and discharging management circuit to form at least one of the first, second, and third conduction loops, so that the power bank can meet the application needs of users in more different scenarios.

[0011] According to some embodiments of this application, it further includes an external power port for accessing an external power source and an external power control module connected to the external power port, wherein the external power control module is also connected to the connection point between the first DC / DC module and the second DC / DC module.

[0012] According to some embodiments of this application, a charging control module is also included, which is connected to the external power port and the energy storage battery respectively.

[0013] According to some embodiments of this application, the first port module includes a first device access port for connecting to the first external device, a first switch transistor, a second switch transistor, a first resistor, and a second resistor; the first device access port is connected to one switch pin of the first switch transistor, the other switch pin of the first switch transistor is connected to one end of the first resistor and one switch pin of the second switch transistor, and the other switch pin of the second switch transistor is connected to the first DC / DC module; the control pin of the first switch transistor, the control pin of the second switch transistor, the other end of the first resistor, and one end of the second resistor are connected together, and the other end of the second resistor serves as the control terminal of the first port module and is connected to the main control module;

[0014] The circuit structure of the second port module is the same as that of the first port module.

[0015] According to some embodiments of this application, the first DC / DC module includes a third switch, a fourth switch, a fifth switch, a sixth switch, a first inductor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor.

[0016] Another switch pin of the second switch transistor is connected to a switch pin of the third switch transistor, and another switch pin of the third switch transistor is connected to a switch pin of the fifth switch transistor, one end of the first inductor, and one end of the third resistor. The other end of the third resistor is connected to one end of the first capacitor.

[0017] One switch pin of the fourth switch is connected to the battery access control module, and the other switch pin of the fourth switch is connected to one switch pin of the sixth switch, the other end of the first inductor, and one end of the fourth resistor. The other end of the fourth resistor is connected to one end of the second capacitor.

[0018] The other switch pin of the fifth switch, the other end of the first capacitor, the other switch pin of the sixth switch, and the other end of the second capacitor are connected together and grounded.

[0019] The control pins of the third switch, the fourth switch, the fifth switch, and the sixth switch are connected to the main control module.

[0020] The circuit structure of the second DC / DC module is the same as that of the first DC / DC module.

[0021] According to some embodiments of this application, the through module includes a seventh switch, an eighth switch, a ninth switch, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor;

[0022] One switch pin of the seventh switch is connected to the connection point between the first port module and the first DC / DC module; one switch pin of the eighth switch is connected to the connection point between the second port module and the second DC / DC module; the other switch pin of the seventh switch, the other switch pin of the eighth switch, and one end of the fifth resistor are connected together; the control pin of the seventh switch, the control pin of the eighth switch, the other end of the fifth resistor, and one end of the sixth resistor are connected together.

[0023] The other end of the sixth resistor is connected to one of the switch pins of the ninth switch transistor. The control pin of the ninth switch transistor, one end of the seventh resistor, and one end of the eighth resistor are connected together. The other switch pin of the ninth switch transistor and the other end of the seventh resistor are connected together and grounded.

[0024] The other end of the eighth resistor is connected to the main control module as the control terminal of the through module.

[0025] According to some embodiments of this application, the battery access control module includes a tenth switch, an eleventh switch, a twelfth switch, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor;

[0026] One switch pin of the tenth switch is connected to one switch pin of the fourth switch; one switch pin of the eleventh switch is connected to the energy storage battery; another switch pin of the tenth switch, another switch pin of the eleventh switch, and one end of the ninth resistor are connected together; the control pin of the tenth switch, the control pin of the eleventh switch, the other end of the ninth resistor, and one end of the tenth resistor are connected together.

[0027] The other end of the tenth resistor is connected to one of the switching pins of the twelfth switch transistor. The control pin of the twelfth switch transistor, one end of the eleventh resistor, and one end of the twelfth resistor are connected together. The other switching pin of the twelfth switch transistor and the other end of the eleventh resistor are connected together and grounded.

[0028] The other end of the twelfth resistor is connected to the main control module as the control terminal of the battery access control module.

[0029] According to some embodiments of this application, the external power control module includes a thirteenth switching transistor, a fourteenth switching transistor, a fifteenth switching transistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor;

[0030] One switch pin of the thirteenth switch is connected to one switch pin of the fourth switch; one switch pin of the fourteenth switch is connected to the external power supply port; another switch pin of the thirteenth switch, another switch pin of the fourteenth switch, and one end of the thirteenth resistor are connected together; the control pin of the thirteenth switch, the control pin of the fourteenth switch, the other end of the thirteenth resistor, and one end of the fourteenth resistor are connected together.

[0031] The other end of the fourteenth resistor is connected to one of the switching pins of the fifteenth switch transistor. The control pin of the fifteenth switch transistor, one end of the fifteenth resistor, and one end of the sixteenth resistor are connected together. The other switching pin of the fifteenth switch transistor and the other end of the fifteenth resistor are connected together and grounded.

[0032] The other end of the sixteenth resistor is connected to the main control module as the control terminal of the external power control module.

[0033] According to some embodiments of this application, a third port module for accessing a third external device is also included, the third port module being connected to the connection point between the second port module and the second DC / DC module.

[0034] Secondly, embodiments of this application provide a mobile power supply, including an energy storage battery and a charge / discharge management circuit as described above connected to the energy storage battery. Attached Figure Description

[0035] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0036] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0037] Figure 1 This is a circuit block diagram of a charge / discharge management circuit provided in one embodiment of this application;

[0038] Figure 2 This is a circuit schematic diagram of the first port module in a charge / discharge management circuit provided in another embodiment of this application;

[0039] Figure 3 This is a circuit schematic diagram of the first DC / DC module in the charge / discharge management circuit provided in another embodiment of this application;

[0040] Figure 4 This is a circuit schematic diagram of the through module in the charge / discharge management circuit provided in another embodiment of this application;

[0041] Figure 5 This is a circuit diagram of the battery access control module in a charge / discharge management circuit provided in another embodiment of this application.

[0042] Figure 6 This is a circuit schematic diagram of the external power control module in the charge and discharge management circuit provided in another embodiment of this application. Detailed Implementation

[0043] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0044] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0046] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0047] The various embodiments of the charge / discharge management circuit of this application will be further described below with reference to the accompanying drawings.

[0048] Firstly, such as Figure 1 As shown, Figure 1 This is a circuit block diagram of a charge / discharge management circuit provided in one embodiment of this application. The charge / discharge management circuit may include a first port module 100, a second port module 200, a battery access control module 300, a first DC / DC module 400, a second DC / DC module 500, a through module 600, and a main control module 700, wherein:

[0049] The first port module 100 is used to connect to a first external device; the second port module 200 is used to connect to a second external device; the battery access control module 300 is used to connect to an energy storage battery; the first DC / DC module 400 is connected between the first port module 100 and the battery access control module 300; the second DC / DC module 500 is connected between the second port module 200 and the battery access control module 300; and the through module 600 is connected between the first port module 100 and the second port module 200.

[0050] The main control module 700 is connected to the first port module 100, the second port module 200, the battery access control module 300, the first DC / DC module 400, the second DC / DC module 500, and the through module 600 to form at least one of the following conduction loops:

[0051] The first external device is connected to the first conducting loop formed by the energy storage battery through the first port module 100, the first DC / DC module 400, and the battery access control module 300.

[0052] The second external device is connected to the energy storage battery to form a second conduction loop via the second port module 200, the second DC / DC module 500, and the battery access control module 300.

[0053] The third conducting loop is formed by connecting the first external device to the second external device sequentially through the first port module 100, the through module 600, and the second port module 200.

[0054] According to the technical solution of the embodiments of this application, the first port module 100 and the second port module 200 refer to interface modules for connecting external devices, such as Type-C interfaces or USB interfaces; the pass-through module 600 is connected between the first port module 100 and the second port module 200. When the pass-through module 600 is turned on, the power transmission path between the first port module 100 and the second port module 200 is also turned on. That is, when both the first port module 100 and the second port module 200 are connected to external devices, if the pass-through module 600 is turned on, power transmission can be performed between the external devices; therefore, the main control module 700 is communicatively connected to the first port module 100 and the second port module 200 respectively. When it detects that the first port module 100 and the second port module 200 are respectively connected to external devices, the main control module 700 can transmit power between the external devices. In the case of a charging device and an external load device, that is, when the two port modules are connected to an external power source and an external load respectively, the charging parameters of the external charging device can be obtained by communicating with the external charging device and the external load device through a protocol handshake. In this way, the power supply capacity of the external charging device can be determined based on the charging parameters, so that the external charging device can supply power to the external load device through the direct connection module 600, thereby realizing simultaneous charging and discharging. Furthermore, the direct power supply of the external charging device to the external load device can also reduce energy loss during the charging and discharging process. In addition, the main control module 700 can also control the charging and discharging management circuit to form at least one of the first conduction loop, the second conduction loop, and the third conduction loop, so that the power bank can meet the application needs of users in more different scenarios.

[0055] like Figure 1As shown, in a charging and discharging management circuit provided in one embodiment of this application, there is also an external power port AC-IN for connecting to an external power source and an external power control module 800 connected to the external power port AC-IN. The external power control module 800 is also connected to the connection point between the first DC / DC module 400 and the second DC / DC module 500.

[0056] In this embodiment, when the external power port AC-IN is connected to an external power source, the main control module 700 can also control the external power control module 800 and the first port module 100 to conduct, thereby forming a fourth conduction loop from the external power port AC-IN through the external power control module 800, the first DC / DC module 400, and the first port module 100 to the first external device, thus enabling the external power source to supply power to the first external device; the main control module 700 can also control the external power control module 800 and the second port module 200 to conduct, thereby forming a fifth conduction loop from the external power port AC-IN through the external power control module 800, the second DC / DC module 500, and the second port module 200 to the second external device, thus enabling the external power source to supply power to the second external device.

[0057] like Figure 1 As shown, in one embodiment of the charging and discharging management circuit provided in this application, a charging control module 900 is also included. The charging control module 900 is connected to the external power port AC-IN and the energy storage battery, respectively.

[0058] In this embodiment, the main control module 700 can be turned on through the charging control module 900, thereby forming a sixth conduction circuit from the external power port AC-IN through the charging control module 900 to the energy storage battery, so as to realize the external power supply to charge the energy storage battery.

[0059] like Figure 2 As shown, in a charging and discharging management circuit provided in one embodiment of this application, the first port module 100 includes a first device access port C1-VBUS for connecting a first external device, a first switch Q1, a second switch Q2, a first resistor R1, and a second resistor R2; the first device access port C1-VBUS is connected to one switch pin of the first switch Q1, the other switch pin of the first switch Q1 is connected to one end of the first resistor R1 and one switch pin of the second switch Q2, and the other switch pin of the second switch Q2 is connected to the first DC / DC module 400; the control pin of the first switch Q1, the control pin of the second switch Q2, the other end of the first resistor R1, and one end of the second resistor R2 are connected together, and the other end of the second resistor R2 serves as the control terminal of the first port module 100 and is connected to the main control module 700.

[0060] In this embodiment, the main control module 700 can output a control signal C1-EN to the first port module 100 through its output port, thereby turning on the first switch Q1 and the second switch Q2, and connecting the first external device to the first DC / DC module 400. It should be noted that the other end of the second resistor R2 serves as the control terminal of the first port module 100, and can be directly connected to the main control module 700, or indirectly connected, for example, through some intermediate control chip.

[0061] In addition, the circuit structure of the second port module 200 is the same as that of the first port module 100, and will not be repeated here.

[0062] like Figure 3 As shown, in a charging and discharging management circuit provided in one embodiment of this application, the first DC / DC module 400 includes a third switch Q3, a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, a first inductor L1, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a second capacitor C2.

[0063] The other switch pin of the second switch transistor Q2 is connected to one switch pin of the third switch transistor Q3. The other switch pin of the third switch transistor Q3 is connected to one switch pin of the fifth switch transistor Q5, one end of the first inductor L1 and one end of the third resistor R3. The other end of the third resistor R3 is connected to one end of the first capacitor C1.

[0064] One switch pin of the fourth switch transistor Q4 is connected to the battery access control module 300. The other switch pin of the fourth switch transistor Q4 is connected to one switch pin of the sixth switch transistor Q6, the other end of the first inductor L1, and one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to one end of the second capacitor C2.

[0065] The other switch pin of the fifth switch transistor Q5, the other end of the first capacitor C1, the other switch pin of the sixth switch transistor Q6, and the other end of the second capacitor C2 are connected together and grounded.

[0066] The control pins of the third switch Q3, the fourth switch Q4, the fifth switch Q5, and the sixth switch Q6 are connected to the main control module 700.

[0067] In this embodiment, the main control module 700 can control the third switch Q3, the fourth switch Q4, the fifth switch Q5, and the sixth switch Q6 to enable the first DC / DC module 400 to perform power conversion, such as changing the voltage. It should be noted that the control pins of the third switch Q3, the fourth switch Q4, the fifth switch Q5, and the sixth switch Q6 can be directly connected to the main control module 700, or indirectly connected, for example, through a DC-DC converter drive control chip before being connected to the main control module 700.

[0068] In addition, the circuit structure of the second DC / DC module 500 is the same as that of the first DC / DC module 400, and will not be repeated here.

[0069] like Figure 4 As shown, in a charging and discharging management circuit provided in one embodiment of this application, the through module 600 includes a seventh switch Q7, an eighth switch Q8, a ninth switch Q9, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8.

[0070] One switch pin of the seventh switch Q7 is connected to the connection point between the first port module 100 and the first DC / DC module 400; one switch pin of the eighth switch Q8 is connected to the connection point between the second port module 200 and the second DC / DC module 500; the other switch pin of the seventh switch Q7, the other switch pin of the eighth switch Q8, and one end of the fifth resistor R5 are connected together; the control pin of the seventh switch Q7, the control pin of the eighth switch Q8, the other end of the fifth resistor R5, and one end of the sixth resistor R6 are connected together.

[0071] The other end of the sixth resistor R6 is connected to one of the switching pins of the ninth switch Q9. The control pin of the ninth switch Q9, one end of the seventh resistor R7, and one end of the eighth resistor R8 are connected together. The other switching pin of the ninth switch Q9 and the other end of the seventh resistor R7 are connected together and grounded.

[0072] The other end of the eighth resistor R8 is connected to the main control module 700 as the control terminal of the through module 600.

[0073] In this embodiment, the main control module 700 can output the control signal PASS-EN to the pass-through module 600, which turns on the ninth switch Q9, and then turns on the seventh switch Q7 and the eighth switch Q8, thereby forming a third conduction loop from the first external device through the first port module 100, the pass-through module 600 and the second port module 200 to the second external device, so as to realize that the first external device directly supplies power to the second external device, or the second external device directly supplies power to the first external device.

[0074] like Figure 5 As shown, in a charging and discharging management circuit provided in one embodiment of this application, the battery access control module 300 includes a tenth switch Q10, an eleventh switch Q11, a twelfth switch Q12, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R12.

[0075] One switch pin of the tenth switch transistor Q10 is connected to one switch pin of the fourth switch transistor Q4; one switch pin of the eleventh switch transistor Q11 is connected to the energy storage battery; the other switch pin of the tenth switch transistor Q10, the other switch pin of the eleventh switch transistor Q11, and one end of the ninth resistor R9 are connected together; the control pin of the tenth switch transistor Q10, the control pin of the eleventh switch transistor Q11, the other end of the ninth resistor R9, and one end of the tenth resistor R10 are connected together.

[0076] The other end of the tenth resistor R10 is connected to one of the switching pins of the twelfth switch Q12. The control pin of the twelfth switch Q12, one end of the eleventh resistor R11, and one end of the twelfth resistor R12 are connected together. The other switching pin of the twelfth switch Q12 and the other end of the eleventh resistor R11 are connected together and grounded.

[0077] The other end of the twelfth resistor R12 is connected to the main control module 700 as the control terminal of the battery access control module 300.

[0078] In this embodiment, the main control module 700 can output the control signal BAT-EN to the battery access control module 300, so that the twelfth switch Q12 is turned on, and then the tenth switch Q10 and the eleventh switch Q11 are turned on, so that the energy storage device can supply power to the external device.

[0079] like Figure 6 As shown, in a charging and discharging management circuit provided in one embodiment of this application, the external power control module 800 includes a thirteenth switch Q13, a fourteenth switch Q14, a fifteenth switch Q15, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a sixteenth resistor R16.

[0080] One switch pin of the thirteenth switch Q13 is connected to one switch pin of the fourth switch Q4; one switch pin of the fourteenth switch Q14 is connected to the external power supply port AC-IN; the other switch pin of the thirteenth switch Q13, the other switch pin of the fourteenth switch Q14, and one end of the thirteenth resistor R13 are connected together; the control pin of the thirteenth switch Q13, the control pin of the fourteenth switch Q14, the other end of the thirteenth resistor R13, and one end of the fourteenth resistor R14 are connected together.

[0081] The other end of the fourteenth resistor R14 is connected to one of the switching pins of the fifteenth switch Q15. The control pin of the fifteenth switch Q15, one end of the fifteenth resistor R15, and one end of the sixteenth resistor R16 are connected together. The other switching pin of the fifteenth switch Q15 and the other end of the fifteenth resistor R15 are connected together and grounded.

[0082] The other end of the sixteenth resistor R16 is connected to the main control module 700 as the control terminal of the external power control module 800.

[0083] In this embodiment, the main control module 700 can output the control signal AC-EN to the external power control module 800, so that the fifteenth switch Q15 is turned on, and then the thirteenth switch Q13 and the fourteenth switch Q14 are turned on, so that the external power supply can directly power the first port module 100 or the second port module 200 connected to the external device.

[0084] like Figure 1 As shown, in one embodiment of the charging and discharging management circuit provided in this application, a third port module 1000 connected to a third external device is also included. The third port module is connected to the connection point between the second port module 200 and the second DC / DC module 500.

[0085] Secondly, embodiments of this application provide a mobile power supply, including an energy storage battery and a charge / discharge management circuit of any of the above-mentioned components connected to the energy storage battery.

[0086] It is understood that the charging and discharging management circuit provided in this application can be applied to power devices such as mobile power supply devices, home or commercial energy storage power supply devices.

[0087] The first port module 100 and the second port module 200 refer to interfaces for connecting external devices. For example, when the charge and discharge management circuit is applied to a power bank, the first port module 100 and the second port module 200 refer to interfaces such as USB, Type-C, and Lightning on the power bank. Each interface can be used to connect external load devices, such as smartphones, tablets, and headphones, to provide charging services for external devices or for data transmission. In addition, the built-in battery of the power bank connected to the charge and discharge management circuit can also be charged through these interfaces.

[0088] It is understood that the first port module 100 and the second port module 200 can be the same port module, or they can be port modules with different results or different circuits. For example, a power bank may have two Type-C interfaces, which are the first port module 100 and the second port module 200. Both Type-C interfaces can be used to provide charging services for external devices and to charge the battery built into the power bank connected to the charge / discharge management circuit. Alternatively, a power bank may have one Type-C interface and one Type-C connection cable, and the Type-C interface and the Type-C connection cable... The Type-C connector can also be used to provide charging services for external devices and to charge the battery built into the power bank connected to the charge / discharge management circuit. Therefore, the Type-C interface and the Type-C connector can also be the first port module 100 and the second port module 200. In addition, the two interfaces on the power bank may be different in structure or in implementation circuit, but as long as both interfaces are used to connect external load devices to discharge to external devices or to connect external charging devices to charge the battery connected to the charge / discharge management circuit, they can be considered as the first port module 100 and the second port module 200.

[0089] A pass-through module 600 is connected between the first port module 100 and the second port module 200. When the pass-through module 600 is turned on, it forms a power transmission path between the first port module 100 and the second port module 200. It can be understood that the pass-through module 600 may include MOSFETs or relays, as well as electronic components such as power path management ICs, for electronically controlling the conduction between the two ports. Furthermore, the pass-through module 600 is a controllable module, meaning its on / off state can be actively controlled. When it is necessary to open the power transmission path between the first port module 100 and the second port module 200, the pass-through module 600 can be actively turned on. When the pass-through module 600 is turned on, it becomes a module that allows power transmission, thus forming a power transmission path between the first port module 100 and the second port module 200. When the pass-through module 600 is turned off, it can be a module that restricts power transmission, thus blocking the power transmission path between the first port module 100 and the second port module 200.

[0090] The main control module 700 is communicatively connected to the pass-through module 600, the first port module 100, and the second port module 200. That is, the main control module 700 can control the opening and closing of the pass-through module 600, monitor parameters such as current, voltage, and temperature of each module and its operating status in real time, adjust the output current and voltage of the first port module 100 and the second port module 200 according to the needs of external devices, manage the charging and discharging process of the batteries connected to these modules, exchange data with these modules, receive user input commands and display relevant status information, and intelligently allocate energy to different ports according to the system's energy demand and priority. The main control module 700 can be a microcontroller (MCU).

[0091] The main control module 700 can detect parameters such as current, voltage, and temperature, as well as the operating status of each module. Therefore, the main control module 700 can detect the port status of the first port module 100 and the second port module 200, thereby determining whether the first port module 100 and the second port module 200 are connected to external devices, the type of the connected external devices, and whether the external devices are charging devices or load devices. For example, the main control module 700 can determine whether a device is connected and its type by detecting the specific voltage and current requirements of different devices when they are connected, or by identifying the communication protocol of the external device to determine its type. Based on this, the main control module 700 can monitor the operating status of the first port module 100 and the second port module 200. If it determines that the first port module 100 and the second port module 200 are respectively connected to an external charging device and an external load device, that is, the first port module 100 is connected to an external charging device and the second port module 200 is connected to an external load device, or the first port module 100 is connected to an external charging device and the second port module 200 is connected to an external load device, or the first port module 100 is connected to an external load device, the main control module 700 can detect the operating status of the first port module 100 and the second port module 200. When the first port module 100 is connected to an external load device and the second port module 200 is connected to an external charging device, it can be assumed that there are simultaneous discharge and charging needs. Therefore, the main control module 700 can perform protocol handshakes with the external charging device and the external load device through the first port module 100 and the second port module 200 respectively. It can be understood that after the main control module 700 performs protocol handshakes with the external charging device and the external load device respectively, the main control module 700 can: adjust the output voltage and current according to the result of the handshake protocol negotiation to adapt to the charging needs of different devices; for fast charging protocols, the main control module 700 can start the fast charging mode after the handshake is completed; dynamically allocate energy according to the needs of the external load device; identify the importance of different devices and prioritize power supply to key devices; for devices that support data transmission, start the high-speed data transmission mode after the handshake is completed; identify the type of connected device and thus provide corresponding services and functions; and monitor the charging status, device status, and system status in real time.

[0092] It is understandable that when the pass-through module 600 is closed, there is no power transmission path between the first port module 100 and the second port module 200. Therefore, when the first port module 100 and the second port module 200 are respectively connected to an external charging device and an external load device, the main control module 700 can control the pass-through module 600 to be turned on to form a power transmission path between the first port module 100 and the second port module 200, and control the external charging device to supply power to the external load device through the pass-through module 600 based on the charging parameters of the external charging device.

[0093] It is understood that both the first port module 100 and the second port module 200 can be connected to an external load device to discharge the external load device, or connected to an external charging device to charge the battery connected to the charge / discharge management circuit. Furthermore, the power demand of the external load device connected to the first port module 100 and the second port module 200 and the charging power of the external charging device can be the same or different. In some embodiments, if the power demand of the external load device connected to the first port module 100 and the second port module 200 and the charging power of the external charging device are different, the power supply power of the external charging device to the external load device through the direct-connect module 600 can be determined by analyzing the comparison between the power demand of the external load device and the charging power of the external charging device.

[0094] In this embodiment, when the charging power of the external charging device meets the power requirements of the external load device (i.e., when the charging power of the external charging device is greater than the power requirements of the external load device), simply controlling the external charging device to supply power to the external load device through the direct-connect module 600 may result in wasted charging power. Therefore, when the charging power of the external charging device meets the power requirements of the external load device, the external charging device can be controlled to supply power to the external load device through the direct-connect module 600 based on its charging parameters. In this case, the external charging device still has surplus charging power. Therefore, the external charging device can be controlled to supply power to the external load device while meeting its power requirements, and the surplus power can be used to charge the battery connected to the charge / discharge management circuit, such as charging the built-in battery of the power bank. This improves the power utilization rate of the external charging device and reduces energy loss.

[0095] It is understood that both the first port module 100 and the second port module 200 can be used to connect to an external load device to discharge the external load device, or to connect to an external charging device to charge the battery connected to the charge and discharge management circuit. Furthermore, the first port module 100 and the second port module 200 can be connected to the external load device and the external load device simultaneously, or they can be connected to the external load device and the external load device sequentially.

[0096] It is worth noting that the specific implementation methods and technical effects of the mobile power supply in this application can be referred to the specific implementation methods and technical effects of the charging and discharging management circuit in any of the above embodiments.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0098] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0099] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A charge-discharge management circuit, characterized by comprising: include: The first port module is used to connect to the first external device; The second port module is used to connect to a second external device; Battery access control module, used to connect to energy storage battery; A first DC / DC module is connected between the first port module and the battery access control module; The second DC / DC module is connected between the second port module and the battery access control module; A pass-through module is connected between the first port module and the second port module; The main control module is connected to the first port module, the second port module, the battery access control module, the first DC / DC module, the second DC / DC module, and the through module to form at least one of the following conduction loops: The first external device is connected to the energy storage battery in a first conducting loop through the first port module, the first DC / DC module and the battery access control module in sequence; The second external device is connected to the energy storage battery in a second conduction loop via the second port module, the second DC / DC module, and the battery access control module. A third conduction loop is formed by connecting the first external device to the second external device sequentially through the first port module, the pass-through module, and the second port module.

2. The charge-discharge management circuit according to claim 1, characterized by, It also includes an external power port for connecting to an external power source and an external power control module connected to the external power port. The external power control module is also connected to the connection point between the first DC / DC module and the second DC / DC module.

3. The charge-discharge management circuit according to claim 2, characterized by, It also includes a charging control module, which is connected to the external power port and the energy storage battery respectively.

4. The charge-discharge management circuit according to claim 2, wherein The first port module includes a first device access port for connecting the first external device, a first switch transistor, a second switch transistor, a first resistor, and a second resistor; the first device access port is connected to one switch pin of the first switch transistor, the other switch pin of the first switch transistor is connected to one end of the first resistor and one switch pin of the second switch transistor, and the other switch pin of the second switch transistor is connected to the first DC / DC module; The control pins of the first switch transistor, the control pins of the second switch transistor, the other end of the first resistor, and one end of the second resistor are connected together. The other end of the second resistor serves as the control terminal of the first port module and is connected to the main control module. The circuit structure of the second port module is the same as that of the first port module.

5. The charge-discharge management circuit according to claim 4, characterized by, The first DC / DC module includes a third switch, a fourth switch, a fifth switch, a sixth switch, a first inductor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor; Another switch pin of the second switch transistor is connected to a switch pin of the third switch transistor, and another switch pin of the third switch transistor is connected to a switch pin of the fifth switch transistor, one end of the first inductor, and one end of the third resistor. The other end of the third resistor is connected to one end of the first capacitor. One switch pin of the fourth switch is connected to the battery access control module, and the other switch pin of the fourth switch is connected to one switch pin of the sixth switch, the other end of the first inductor, and one end of the fourth resistor. The other end of the fourth resistor is connected to one end of the second capacitor. The other switch pin of the fifth switch, the other end of the first capacitor, the other switch pin of the sixth switch, and the other end of the second capacitor are connected together and grounded. The control pins of the third switch, the fourth switch, the fifth switch, and the sixth switch are connected to the main control module. The circuit structure of the second DC / DC module is the same as that of the first DC / DC module.

6. The charge and discharge management circuit according to claim 5, characterized by The through module includes a seventh switch, an eighth switch, a ninth switch, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor; One switch pin of the seventh switch is connected to the connection point between the first port module and the first DC / DC module; one switch pin of the eighth switch is connected to the connection point between the second port module and the second DC / DC module; the other switch pin of the seventh switch, the other switch pin of the eighth switch, and one end of the fifth resistor are connected together; the control pin of the seventh switch, the control pin of the eighth switch, the other end of the fifth resistor, and one end of the sixth resistor are connected together. The other end of the sixth resistor is connected to one of the switch pins of the ninth switch transistor. The control pin of the ninth switch transistor, one end of the seventh resistor, and one end of the eighth resistor are connected together. The other switch pin of the ninth switch transistor and the other end of the seventh resistor are connected together and grounded. The other end of the eighth resistor is connected to the main control module as the control terminal of the through module.

7. The charge and discharge management circuit according to claim 6, characterized by The battery access control module includes a tenth switch, an eleventh switch, a twelfth switch, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor; One switch pin of the tenth switch is connected to one switch pin of the fourth switch; one switch pin of the eleventh switch is connected to the energy storage battery; another switch pin of the tenth switch, another switch pin of the eleventh switch, and one end of the ninth resistor are connected together; the control pin of the tenth switch, the control pin of the eleventh switch, the other end of the ninth resistor, and one end of the tenth resistor are connected together. The other end of the tenth resistor is connected to one of the switching pins of the twelfth switch transistor. The control pin of the twelfth switch transistor, one end of the eleventh resistor, and one end of the twelfth resistor are connected together. The other switching pin of the twelfth switch transistor and the other end of the eleventh resistor are connected together and grounded. The other end of the twelfth resistor is connected to the main control module as the control terminal of the battery access control module.

8. The charge / discharge management circuit according to claim 7, characterized in that, The external power control module includes a thirteenth switching transistor, a fourteenth switching transistor, a fifteenth switching transistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor; One switch pin of the thirteenth switch is connected to one switch pin of the fourth switch; one switch pin of the fourteenth switch is connected to the external power supply port; another switch pin of the thirteenth switch, another switch pin of the fourteenth switch, and one end of the thirteenth resistor are connected together; the control pin of the thirteenth switch, the control pin of the fourteenth switch, the other end of the thirteenth resistor, and one end of the fourteenth resistor are connected together. The other end of the fourteenth resistor is connected to one of the switching pins of the fifteenth switch transistor. The control pin of the fifteenth switch transistor, one end of the fifteenth resistor, and one end of the sixteenth resistor are connected together. The other switching pin of the fifteenth switch transistor and the other end of the fifteenth resistor are connected together and grounded. The other end of the sixteenth resistor is connected to the main control module as the control terminal of the external power control module.

9. The charge and discharge management circuit according to claim 1, characterized by, It also includes a third port module for connecting to a third external device, the third port module being connected to the connection point between the second port module and the second DC / DC module.

10. A mobile power source, characterized by, It includes an energy storage battery and a charge / discharge management circuit as described in any one of claims 1 to 9 connected to the energy storage battery.

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