Charging and discharging control circuit and charging and discharging system

Abstract

The utility model discloses a charging and discharging control circuit and a charging and discharging system, and relates to the technical field of battery management, and the charging and discharging control circuit comprises a main control module, a voltage adjustment module, a TypeC input and output module and a solar energy input module. The main control module is in communication connection with the voltage adjusting module, the TypeC input and output module and the solar energy input module. The voltage adjusting module is electrically connected with the TypeC input and output module, the target battery and the solar energy input module. The main control module is used for collecting a first port signal of the TypeC input and output module and a second port signal of the solar energy input module, and adjusting the working mode of the voltage adjusting module according to the first port signal and the second port signal so as to charge and discharge the target battery; according to the technical scheme, MPPT charging or TypeC charging and discharging functions of solar energy are directly supported on the basis of one circuit, and flexible switching between the MPPT charging function and the TypeC charging and discharging function can be achieved.

Description

Technical Field

[0001] This application relates to the field of battery management technology, and in particular to a charge / discharge control circuit and a charge / discharge system. Background Technology

[0002] Current mainstream solar charging solutions adopt an integrated design strategy, embedding an MPPT (Maximum Power Point Tracking) controller and a USB_C protocol conversion module inside the solar panel to form an integrated system of "photovoltaic power generation - intelligent control - protocol adaptation". This solution uses the MPPT algorithm to track the optimal operating point of the photovoltaic panel in real time, and in conjunction with the PD (Power Delivery) protocol, achieves fast charging output of up to 100W, effectively meeting the low-carbon charging needs of mobile devices.

[0003] However, this technological approach faces two major bottlenecks: First, the customized design of the USB_C protocol conversion module increases production costs compared to traditional solutions, significantly weakening the price competitiveness of photovoltaic products. Furthermore, the overall solar energy utilization rate decreases due to the two energy conversions involved. Second, the closed nature of the system architecture limits device compatibility. Similar battery products use Type-C ports for charging and discharging, as well as solar charging. If solar panels are needed for charging, only those with built-in MPPT functionality and USB_C protocol modules can achieve effective charging. This makes it incompatible with other ports that still hold a significant global market share, creating a technological barrier that restricts the application of clean energy. Utility Model Content

[0004] The main purpose of this application is to propose a charging and discharging control circuit and a charging and discharging system, which aims to solve the problem that current battery products cannot simultaneously support charging and discharging via Type-C port and charging via solar panels on any port.

[0005] To achieve the above objectives, the present application proposes a charge / discharge control circuit, which includes a main control module, a voltage adjustment module, a Type-C input / output module, and a solar input module.

[0006] The main control module is communicatively connected to the voltage adjustment module, the Type-C input / output module, and the solar input module, respectively.

[0007] The voltage adjustment module is electrically connected to the Type-C input / output module, the target battery, and the solar input module, respectively.

[0008] The main control module is used to collect the first port signal of the Type-C input / output module and the second port signal of the solar input module, and adjust the working mode of the voltage adjustment module according to the first port signal and the second port signal to charge and discharge the target battery.

[0009] In one embodiment, the Type-C input / output module includes a protocol control unit and a Type-C input / output unit;

[0010] The main control module is communicatively connected to the protocol control unit;

[0011] The protocol control unit is communicatively connected to the Type-C input / output unit;

[0012] The voltage adjustment module and the Type-C input / output unit are electrically connected;

[0013] The protocol control unit is used to collect the first port signal of the Type-C input / output unit and forward the first port signal to the main control module.

[0014] In one embodiment, the Type-C input / output unit includes a Type-C port and a first control switch unit;

[0015] The first control switch unit is electrically connected to the Type-C port and the voltage adjustment module respectively, and the first control switch unit is communicatively connected to the protocol control unit;

[0016] The main control module is used to output a corresponding first switch control signal to the protocol control unit based on the first port signal and the second port signal;

[0017] The protocol control unit is used to control the on / off state of the first control switch unit according to the first switch control signal.

[0018] In one embodiment, the first control switch unit includes:

[0019] The first field-effect transistor, the source of the first field-effect transistor is connected to the Type-C port;

[0020] The drain of the second field-effect transistor is connected to the drain of the first field-effect transistor, and the source of the second field-effect transistor is connected to the voltage adjustment module.

[0021] The third field-effect transistor has its drain connected to the gate of the first field-effect transistor and the gate of the second field-effect transistor, and its source connected to the first power supply ground terminal.

[0022] In one embodiment, the solar input module includes a solar input port, a filtering unit, and a second control switch unit;

[0023] The main control module is communicatively connected to the second control switch unit;

[0024] The filtering unit is electrically connected to the solar energy input port and the second control switch unit, respectively.

[0025] The second control switch unit is electrically connected to the voltage adjustment module;

[0026] The main control module is used to output a corresponding second switch control signal to the second control switch unit according to the first port signal and the second port signal, so as to control the on and off of the second control switch unit.

[0027] In one embodiment, the filtering unit includes:

[0028] A fuse, the first end of which is connected to the solar input port;

[0029] A first Zener diode, the first end of which is connected to the second end of the fuse, and the second end of which is connected to the solar input port;

[0030] An inductor, wherein the first end of the first coil of the inductor is connected to the second end of the fuse, the second end of the first coil of the inductor is connected to the second control switch unit, the first end of the second coil of the inductor is connected to the solar input port, and the second end of the second coil of the inductor is connected to the second power ground terminal.

[0031] In one embodiment, the second control switch unit includes:

[0032] A fourth field-effect transistor, the drain of which is connected to the filter unit;

[0033] The second Zener diode has its cathode connected to the source of the fourth field-effect transistor and its anode connected to the gate of the fourth field-effect transistor.

[0034] The fifth field-effect transistor has its source connected to the source of the fourth field-effect transistor, its drain connected to the voltage adjustment module, and its gate connected to the gate of the fourth field-effect transistor.

[0035] A first resistor, the first end of which is connected to the gate of the fourth field-effect transistor and the gate of the fifth field-effect transistor;

[0036] The sixth field-effect transistor has its drain connected to the second terminal of the first resistor and its source connected to the second power supply ground terminal.

[0037] The second resistor has its first end connected to the gate of the sixth field-effect transistor and its second end connected to the main control module.

[0038] In one embodiment, the voltage adjustment module includes a buck-boost chip and a third control switch unit. The buck-boost chip is communicatively connected to the main control module and the third control switch unit, respectively. The third control switch unit is electrically connected to the Type-C input / output module, the solar input module, and the target battery, respectively.

[0039] The third control switch unit is used to switch the connection between the Type-C input / output module and the solar input module and the target power source according to the working mode of the buck-boost chip.

[0040] In one embodiment, the third control switch unit includes:

[0041] The seventh field-effect transistor has its drain connected to the first control switch unit or the second control switch unit, and its source connected to the voltage adjustment module.

[0042] The eighth field-effect transistor has its drain connected to the voltage adjustment module and its source connected to the first power supply ground terminal.

[0043] The third resistor has its first end connected to the gate of the seventh field-effect transistor and its second end connected to the voltage adjustment module.

[0044] The fourth resistor has its first end connected to the gate of the eighth field-effect transistor and its second end connected to the voltage adjustment module.

[0045] An inductor, the first end of which is connected to the source of the seventh field-effect transistor;

[0046] A ninth field-effect transistor, wherein the source of the ninth field-effect transistor is connected to the second terminal of the inductor, and the drain of the ninth field-effect transistor is connected to the target battery;

[0047] The tenth field-effect transistor has its drain connected to the second terminal of the inductor and its source connected to the first power supply ground terminal.

[0048] The fifth resistor has its first end connected to the gate of the tenth field-effect transistor and its second end connected to the voltage adjustment module.

[0049] The sixth resistor has its first end connected to the gate of the ninth field-effect transistor and its second end connected to the voltage adjustment module.

[0050] This application also proposes a charging and discharging system, which includes a target battery and the aforementioned charging and discharging control circuit.

[0051] The technical solution of this application employs a charge / discharge control circuit, which includes a main control module, a voltage adjustment module, a Type-C input / output module, and a solar input module. The main control module is communicatively connected to the voltage adjustment module, the Type-C input / output module, and the solar input module. The voltage adjustment module is electrically connected to the Type-C input / output module, the target battery, and the solar input module. The main control module is used to acquire the first port signal of the Type-C input / output module and the second port signal of the solar input module, and adjust the operating mode of the voltage adjustment module according to the first port signal and the second port signal to charge and discharge the target battery.

[0052] This application connects both the Type-C input / output module and the solar input module to the main control module. The main control module then controls the voltage adjustment module to perform corresponding boost / buck control based on the port signals from the two different ports. This allows a single circuit to directly support either MPPT charging of solar power or charging / discharging of Type-C, and enables flexible switching between the two. This effectively achieves simultaneous compatibility between charging / discharging the Type-C port and charging the solar panel at any port for the battery product. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the structure of an embodiment of the charge / discharge control circuit of this application;

[0055] Figure 2 A schematic diagram of a module of an embodiment of the charge / discharge control circuit of this application, which also includes a Type-C input / output unit and a protocol control unit;

[0056] Figure 3A schematic diagram of a module of an embodiment of the charge / discharge control circuit of this application, which also includes a Type-C port and a first control switch unit;

[0057] Figure 4 This is a schematic diagram of the structure of an embodiment of the first control switch unit in the charge / discharge control circuit of this application;

[0058] Figure 5 The schematic diagram of the charging and discharging control circuit of this application also includes a solar input port, a filtering unit, and a second control switch unit;

[0059] Figure 6 This is a schematic diagram of the structure of a filter unit in the charge / discharge control circuit of this application;

[0060] Figure 7 This is a schematic diagram of the structure of an embodiment of the second control switch unit in the charge / discharge control circuit of this application;

[0061] Figure 8 This is a detailed structural schematic diagram of one embodiment of the charge / discharge control circuit of this application;

[0062] Figure 9 This is a schematic diagram of a module that also includes a third control switch unit in the charge / discharge control circuit of this application;

[0063] Figure 10 This is a schematic diagram of an embodiment of the third control switch unit in the charge / discharge control circuit of this application.

[0064] Explanation of icon numbers:

[0065] label name label name 10 Main control module 20 Voltage regulation module 30 Type C Input / Output Module 40 Solar input module 21 buck-boost chip 22 Third control switch unit 31 Type C Input / Output Unit 32 Protocol control unit 311 Type-C port 312 First control switch unit 41 Solar input port 42 Second control switch unit PD_GND First power supply ground terminal PD_GND1 Second power supply grounding terminal BAT Target battery Q1-Q10 Field-effect transistor R1-R20 resistance C1-C17 capacitance ZD1-ZD2 Zener diode FS1 Fuse LF1 Inductor L1 inductance

[0066] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0067] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0068] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0069] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0070] Currently, mainstream solar charging solutions face two major technical bottlenecks: First, the customized design of the USB_C protocol conversion module increases production costs compared to traditional solutions, significantly weakening the price competitiveness of photovoltaic products. Furthermore, the overall solar energy utilization rate decreases due to the two energy conversions involved. Second, the closed nature of the system architecture limits device compatibility. Similar battery products use Type-C ports for charging and discharging, and solar charging. If solar panels are needed for charging, only those with built-in MPPT functionality and USB_C protocol modules can achieve effective charging. This makes it impossible to adapt to other ports that still hold a significant global market share, creating a technical barrier that restricts the application of clean energy.

[0071] Based on this, this application provides a charge / discharge control circuit, which includes a main control module, a voltage adjustment module, a Type-C input / output module, and a solar input module. The main control module is communicatively connected to the voltage adjustment module, the Type-C input / output module, and the solar input module. The voltage adjustment module is electrically connected to the Type-C input / output module, the target battery, and the solar input module. The main control module is used to acquire a first port signal from the Type-C input / output module and a second port signal from the solar input module, and adjust the operating mode of the voltage adjustment module according to the first port signal and the second port signal to charge and discharge the target battery.

[0072] This application connects both the Type-C input / output module and the solar input module to the main control module. The main control module then controls the voltage adjustment module to perform corresponding boost / buck control based on the port signals from the two different ports. This allows a single circuit to directly support either MPPT charging of solar power or charging / discharging of Type-C, and enables flexible switching between the two. This effectively achieves simultaneous compatibility between charging / discharging the Type-C port and charging the solar panel at any port for the battery product.

[0073] This application proposes a charge / discharge control circuit, referring to... Figure 1 , Figure 1 This is a schematic diagram of a charging and discharging control circuit according to an embodiment of the present application. In this embodiment, the charging and discharging control circuit includes a main control module 10, a voltage adjustment module 20, a Type-C input / output module 30, and a solar energy input module 40.

[0074] The main control module 10 is connected to the voltage adjustment module 20, the Type-C input / output module 30, and the solar input module 40, respectively.

[0075] The voltage adjustment module 20 is electrically connected to the Type-C input / output module 30, the target battery, and the solar input module, respectively.

[0076] The main control module 10 is used to collect the first port signal of the Type-C input / output module 30 and the second port signal of the solar input module 40, and adjust the working mode of the voltage adjustment module 20 according to the first port signal and the second port signal to charge and discharge the target battery.

[0077] It should be noted that, in the accompanying drawings of this embodiment, the dashed connecting lines between the modules represent communication connections for transmitting signals; the solid connecting lines represent electrical connections for transmitting current.

[0078] Understandably, configuring a USB-C protocol conversion module and MPPT function in a solar panel would lead to energy loss during multiple conversion processes and also increase the production cost of the solar panel. Therefore, by introducing two energy transmission paths into the battery charging and discharging circuit—a universal solar input and a Type-C input / output—it is possible to support both solar charging and Type-C charging and discharging functions in a single circuit. Furthermore, the introduction of a voltage control module also enables MPPT charging for solar power within this circuit.

[0079] As an example, in this embodiment, the voltage adjustment module 20 can be a buck-boost chip SC8815 (i.e., buck-boost chip 8815), the input port of the solar input module can be port 7909, and the main control module 10 can be an MCU (Microcontroller Unit). This circuit can only use one function at a time. That is, when a device equipped with this circuit is simultaneously plugged into both the Type-C port and the 7909 port, the MCU can preferentially select port 7909 for solar charging. When the solar charging function of port 7909 is unplugged, it automatically switches to the function of port Type-C; when the solar charging function of port 7909 is plugged in, the MCU automatically switches back to solar charging to support automatic identification of the solar charging function of port 7909 and the charging / discharging function of port Type-C, and allows for flexible function switching.

[0080] This embodiment connects the Type-C input / output module 30 and the solar input module 40 to the main control module 10 simultaneously. The main control module 10 controls the voltage adjustment module 20 to perform corresponding boost / buck control based on the port signals of the Type-C port and the solar input port. Thus, a single circuit directly supports MPPT charging of solar power or charging and discharging of Type-C power. Furthermore, it can flexibly switch between MPPT charging of solar power, charging of Type-C power, and discharging of Type-C power, effectively achieving simultaneous compatibility of battery products with charging and discharging of the Type-C port and charging of solar panels at any port.

[0081] In one feasible implementation, refer to Figure 2 , Figure 2 This embodiment of the present application also includes a schematic diagram of a Type C input / output unit and a protocol control unit. The Type C input / output module 30 includes a protocol control unit 32 and a Type C input / output unit 31.

[0082] The main control module 10 is communicatively connected to the protocol control unit 32;

[0083] The protocol control unit 32 is communicatively connected to the Type-C input / output unit 31;

[0084] The protocol control unit 32 is used to collect the first port signal of the Type C input / output unit 31 and forward the first port signal to the main control module 10.

[0085] Understandably, the bidirectional charging and discharging function of Type-C is generally implemented using a protocol chip and a buck-boost chip. In this example, an MCU is added to forward the Type-C port information obtained by the protocol chip to the MCU. The MCU then controls the buck-boost chip to operate in a timely manner to satisfy the bidirectional charging and discharging function of USB_C, thus effectively fulfilling the bidirectional charging and discharging function of Type-C without compatibility issues or other adverse effects.

[0086] As an example, the protocol control unit 32 in this embodiment can be the protocol chip SC2021A (i.e., protocol chip 2021). The protocol chip 2021 forwards the Type C port information obtained from the Type C input / output unit 31 to the MCU, and the MCU then controls the buck-boost chip 8815 to perform the corresponding work.

[0087] In one feasible implementation, refer to Figure 3 , Figure 3 This embodiment of the present application also includes a Type C port and a first control switch unit, wherein the Type C input / output unit 31 includes a Type C port 311 and a first control switch unit 312;

[0088] The first control switch unit 312 is electrically connected to the Type C port 311 and the voltage adjustment module 20 respectively, and the first control switch unit 312 is communicatively connected to the protocol control unit 32;

[0089] The main control module 10 is used to output a corresponding first switch control signal to the protocol control unit 32 according to the first port signal and the second port signal;

[0090] The protocol control unit 32 is used to control the on / off state of the first control switch unit 312 according to the first switch control signal.

[0091] It should be noted that the field-effect transistors in this embodiment are all metal-oxide-semiconductor field-effect transistors (i.e., MOS transistors).

[0092] Understandably, in order to achieve efficient port signal control based on master control signals in the Type-C input / output module and solve the problem of insufficient protocol parsing and physical connection coordination control in traditional solutions, this implementation decouples the protocol parsing (protocol control unit) from the physical layer switch (first control switch unit). This enables the system to quickly respond and complete port on / off control when supporting complex protocols such as USB PD, effectively improving the compatibility and stability of the Type-C interface.

[0093] As an example, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the first control switch unit in the charging and discharging circuit of this application. The first control switch unit 312 includes:

[0094] The seventh resistor R7, the first end of which is connected to the two VBUS interfaces of the TypeC port 311;

[0095] The source of the first field-effect transistor Q1 is connected to the second terminal of the seventh resistor R7;

[0096] The drain of the second field-effect transistor Q2 is connected to the drain of the first field-effect transistor Q1, and the source of the second field-effect transistor Q2 is connected to the voltage adjustment module 20.

[0097] The third field-effect transistor Q3 has its drain connected to the gate of the first field-effect transistor Q1 and the gate of the second field-effect transistor Q2, and its source connected to the first power supply ground terminal PD_GND.

[0098] The eighth resistor R8 has its first end connected to the gate of the first field-effect transistor Q1, and its second end connected to the protocol control unit 32 (the AD6 / TX / P6 port of the protocol chip 2021).

[0099] The ninth resistor R9 has its first end connected to the gate of the third field-effect transistor Q3, and its second end connected to the protocol control unit 32 (the ISO_NGATE port of the protocol chip 2021).

[0100] The tenth resistor R10 has its first end connected to the gate of the third field-effect transistor Q3, and its second end connected to the first power supply ground terminal PD_GND.

[0101] It should be noted that the source of the first field-effect transistor Q1 is connected to the TypeC port via the seventh resistor R7, and the source of the second field-effect transistor Q2 outputs Type&MPPT_VDD to the third control switch unit 22 in the voltage adjustment module 20.

[0102] It is understandable that by using a composite switch control unit consisting of the first field-effect transistor to the third field-effect transistor, a "dual MOSFET parallel drive" topology is constructed. In this topology, the first field-effect transistor and the second field-effect transistor form a bidirectional conduction path, and the third field-effect transistor and the resistor network form a level conversion loop, thus forming an integrated control node with signal isolation, voltage clamping and current regulation functions. This enables precise control of the physical connection of the 10 Type C ports of the main control module.

[0103] In one feasible implementation, refer to Figure 5 , Figure 5 This embodiment of the present application also includes a solar input port, a filtering unit (not shown), and a second control switch unit. The solar input module 40 includes a solar input port 41, a filtering unit 42, and a second control switch unit 43.

[0104] The main control module 10 is communicatively connected to the second control switch unit 43;

[0105] The filter unit 42 is electrically connected to the solar input port 41 and the second control switch unit 43, respectively.

[0106] The second control switch unit 43 is electrically connected to the voltage adjustment module 20;

[0107] The main control module 10 is used to output a corresponding second switch control signal to the second control switch unit 43 according to the first port signal and the second port signal, so as to control the on and off of the second control switch unit 43.

[0108] Understandably, in order to achieve coordinated control of solar input and other charging ports (such as Type-C) in a hybrid power supply system, and to address the technical shortcomings of traditional multi-source input solutions, such as circuit contention, switching delay, and energy loss, an independent input channel is constructed, comprising a solar input port, a filtering unit, and a second control switch unit. Multi-source input management is achieved through a three-level architecture of "filtering and rectification - switch isolation - master control decision". At the same time, the master control module dynamically generates a second switch control signal by analyzing the protocol characteristic signals of multiple ports in real time, forming an intelligent control loop with input source identification, conflict detection, and path optimization.

[0109] As an example, please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the filter unit in the charging and discharging circuit of this application, wherein the filter unit 42:

[0110] Fuse FS1, the first end of which is connected to the two interfaces 1 of the solar input port 41;

[0111] The eleventh resistor R11, the first end of which is connected to the second end of the fuse FS1;

[0112] The twelfth resistor R12 has its first end connected to the second end of the fuse FS1, and its second end connected to the second end of the eleventh resistor R11.

[0113] The first capacitor C1, the first end of the first capacitor C1 is connected to the second end of the eleventh resistor R11;

[0114] The second capacitor C2 has its first end connected to the second end of the first capacitor C1, and its second end connected to interface 2 of the solar input port 41.

[0115] The first Zener diode ZD1 is connected to the second terminal of the fuse FS1, and the second terminal of the first Zener diode ZD1 is connected to the interface 2 of the solar input port 41.

[0116] Inductor LF1, the first end of the first coil of inductor LF1 is connected to the second end of fuse FS1, the second end of the first coil of inductor LF1 is connected to the second control switch unit 43, the first end of the second coil of inductor LF1 is connected to interface 2 of solar input port 41, and the second end of the second coil of inductor LF1 is connected to the second power ground terminal PD_GND1;

[0117] The third capacitor C3 has its first end connected to the second end of the first coil in the inductor LF1, and its second end connected to the second power supply ground terminal PD_GND1.

[0118] The thirteenth resistor R13 has its first end connected to the second end of the first coil in the inductor LF1, and its second end connected to the second power supply ground terminal PD_GND1.

[0119] The fourteenth resistor R14 has its first end connected to the second end of the first coil in the inductor LF1, and its second end connected to the second power supply ground terminal PD_GND1.

[0120] It should be noted that the first Zener diode ZD1 is a bidirectional breakdown diode, and the positive input terminal Solar P+ of the solar panel is connected to the first end of the second coil in the inductor LF1.

[0121] Further, please refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of the second control switch unit in the charging and discharging circuit of this application. The second control switch unit 43 includes:

[0122] The fourth field-effect transistor Q4, the drain of which is connected to the filter unit 42;

[0123] The second Zener diode ZD2 has its cathode connected to the source of the fourth field-effect transistor Q4, and its anode connected to the gate of the fourth field-effect transistor Q4.

[0124] The fourth capacitor C4 has its first terminal connected to the source of the fourth field-effect transistor Q4, and its second terminal connected to the gate of the fourth field-effect transistor Q4.

[0125] The fifteenth resistor R15 has its first end connected to the source of the fourth field-effect transistor Q4, and its second end connected to the gate of the fourth field-effect transistor Q4.

[0126] The fifth field-effect transistor Q5 has its source connected to the source of the fourth field-effect transistor Q4, its drain connected to the voltage adjustment module 20, and its gate connected to the gate of the fourth field-effect transistor Q4.

[0127] The first resistor R1 has its first end connected to the gate of the fourth field-effect transistor Q4 and the gate of the fifth field-effect transistor Q5.

[0128] The sixth field-effect transistor Q6 has its drain connected to the second terminal of the first resistor R1 and its source connected to the second power supply ground terminal PD_GND1.

[0129] The fifth capacitor C5, the first end of the fifth capacitor C5 is connected to the gate of the sixth field-effect transistor Q6, and the second end of the fifth capacitor C5 is connected to the second power supply ground terminal PD_GND1;

[0130] The sixteenth resistor R16 has its first end connected to the gate of the sixth field-effect transistor Q6, and its second end connected to the second power supply ground terminal PD_GND1.

[0131] The second resistor R2 has its first end connected to the gate of the sixth field-effect transistor Q6, and its second end connected to the main control module 10.

[0132] It should be noted that the drain output Type&MPPT_VDD of the fifth field-effect transistor Q5 is sent to the third control switch unit 22 in the voltage adjustment module 20, and the Solar Pmos output by the main control module 10 is used to control the on / off state of the second control switch unit 43.

[0133] Understandably, the filtering unit uses a π-type LC filter network to suppress photovoltaic fluctuations, and the second control switch unit uses a MOSFET with low on-resistance to construct a fully controlled electronic switch. Through hardware-level input channel decoupling, the system can improve the response speed of solar input while supporting Type-C bidirectional fast charging, reduce energy loss during multi-source switching, and achieve complete electrical isolation between solar input and external charging. This effectively solves the technical bottleneck of incompatibility between solar input and wired charging in traditional solutions, thereby providing sufficient solar power for battery devices.

[0134] Furthermore, the complete charge / discharge control circuit formed by combining the above embodiments is referred to... Figure 8 , Figure 8 This is a detailed module diagram of an embodiment of this application.

[0135] In one feasible implementation, please refer to Figure 9 , Figure 9 This embodiment of the present application also includes a schematic diagram of a buck-boost chip and a third control switch unit. The voltage adjustment module 20 includes a buck-boost chip 21 and a third control switch unit 22. The buck-boost chip 21 is communicatively connected to the main control module 10 and the third control switch unit 22, respectively. The third control switch unit 22 is electrically connected to the Type-C input / output module 311, the solar input module 41, and the target battery, respectively.

[0136] The third control switch unit 22 is used to switch the connection between the Type-C input / output module 30 and the solar input module 40 and the target power source according to the working mode of the buck-boost chip 21.

[0137] It should be noted that, in the presence of a Type-C port 311, a first control switch unit 312, a solar input port 41, and a second control switch unit 42 in the circuit, the third control switch unit 22 is electrically connected to the first control switch unit 312, the second control switch unit 42, and the target battery, respectively; the third control switch unit 22 is used to switch the connection between the Type-C port 311 and the solar input port 41 and the target power source according to the operating mode of the buck-boost chip 21.

[0138] The charging and discharging control circuit further includes a third control switch unit 50, which is communicatively connected to the voltage adjustment module 20 and electrically connected to the first control switch unit 312 or the second control switch unit 43, as well as the target battery.

[0139] The third control switch unit 50 is used to switch the connection between the Type C port 311 and the solar input port 41 and the target power source according to the working mode of the voltage adjustment module 20.

[0140] It is understandable that when the first control switch unit 312 and the second control switch unit 43 are present in the circuit, the third control switch unit 50 is electrically connected to the first control switch unit 312, the second control switch unit 43, and the target battery, respectively.

[0141] As an example, please refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of the third control switch unit 50 in the charging and discharging circuit of this application. The third control switch unit 50 includes:

[0142] The sixth capacitor C6, the first terminal of which is connected to the first power supply ground terminal PD_GND;

[0143] The seventh field-effect transistor Q7 has its drain connected to the first control switch unit 312 or the second control switch unit 42 and the second terminal of the sixth capacitor C6, and its source connected to the voltage adjustment module 20 (SW1 interface of the buck-boost chip 8815).

[0144] The seventh capacitor C7 has its first end connected to the gate of the seventh field-effect transistor Q7, and its second end connected to the voltage adjustment module 20 (SW1 interface of the buck-boost chip 8815).

[0145] The seventeenth resistor R17, the first end of which is connected to the second end of the sixth capacitor C6;

[0146] The eighth capacitor C8, the first end of the eighth capacitor C8 is connected to the second end of the nineteenth resistor R19, and the second end of the eighth capacitor C8 is connected to the voltage adjustment module 20 (SW1 interface of the buck-boost chip 8815).

[0147] The ninth capacitor C9 has its first terminal connected to the source of the seventh field-effect transistor Q7, and its second terminal connected to the voltage adjustment module 20 (BT1 interface of the buck-boost chip 8815).

[0148] The eighth field-effect transistor Q8 has its drain connected to the voltage adjustment module 20 (SW1 interface of the buck-boost chip 8815) and its source connected to the first power supply ground terminal PD_GND.

[0149] The tenth capacitor C10, the first end of the tenth capacitor C10 is connected to the gate of the eighth field-effect transistor Q8, and the second end of the tenth capacitor C10 is connected to the first power supply ground terminal PD_GND;

[0150] The eighteenth resistor R18, the first end of which is connected to the voltage adjustment module 20 (SW1 interface of the buck-boost chip 8815);

[0151] The eleventh capacitor C11, the first end of the eleventh capacitor C11 is connected to the second end of the twentieth resistor R20, and the second end of the eleventh capacitor C11 is connected to the first power supply ground terminal PD_GND;

[0152] The third resistor R3 has its first end connected to the gate of the seventh field-effect transistor Q7, and its second end connected to the voltage adjustment module 20 (HD1 interface of the buck-boost chip 8815).

[0153] The fourth resistor R4 has its first end connected to the gate of the eighth field-effect transistor Q8, and its second end connected to the voltage adjustment module 20 (LD1 interface of the buck-boost chip 8815).

[0154] Inductor L1, the first end of which is connected to the source of the seventh field-effect transistor Q7;

[0155] The twelfth capacitor C12, the first end of which is connected to the second end of the inductor L1 and the voltage adjustment module 20 (SW2 interface of the buck-boost chip 8815);

[0156] The nineteenth resistor R19, the first end of which is connected to the second end of the twelfth capacitor C12, and the second end of which is connected to the target battery BAT;

[0157] The thirteenth capacitor C13 has its first terminal connected to the second terminal of the nineteenth resistor R19, and its second terminal connected to the first power supply ground terminal PD_GND.

[0158] The ninth field-effect transistor Q9 has its source connected to the second terminal of the inductor L1 and its drain connected to the target battery BAT.

[0159] The fourteenth capacitor C14, the first end of the fourteenth capacitor C14 is connected to the second end of the inductor L1, and the second end of the fourteenth capacitor C14 is connected to the gate of the ninth field-effect transistor Q9;

[0160] The twentieth resistor R20, the first end of which is connected to the second end of the inductor L1;

[0161] The fifteenth capacitor C15, the first end of the fifteenth capacitor C15 is connected to the second end of the twentieth resistor R20, and the second end of the fifteenth capacitor C15 is connected to the first power supply ground terminal PD_GND;

[0162] The tenth field-effect transistor Q10 has its drain connected to the second terminal of the inductor L1 and its source connected to the first power supply ground terminal PD_GND.

[0163] The sixteenth capacitor C16, the first end of the sixteenth capacitor C16 is connected to the gate of the tenth field-effect transistor Q10, and the second end of the sixteenth capacitor C16 is connected to the first power supply ground terminal PD_GND;

[0164] The fifth resistor R5 has its first end connected to the gate of the tenth field-effect transistor Q10, and its second end connected to the voltage adjustment module 20 (LD2 interface of the buck-boost chip 8815).

[0165] The sixth resistor R6 has its first end connected to the gate of the ninth field-effect transistor Q9, and its second end connected to the voltage adjustment module 20 (HD2 interface of the buck-boost chip 8815).

[0166] The seventeenth capacitor C17 has its first terminal connected to the second terminal of the inductor L1, and its second terminal connected to the voltage adjustment module 20 (BT2 interface of the buck-boost chip 8815).

[0167] In addition, the voltage adjustment module 20 is connected to the MCU via the GPO interface, / CE interface, PSTOP interface, SCL interface, and SDA interface.

[0168] Understandably, in hybrid power supply scenarios, how to achieve dynamic power routing between charging and discharging modes to solve the technical problems of bidirectional energy flow conflict, mode switching oscillation, and decreased system stability caused by "charging and discharging path coupling" in traditional solutions is a challenge. This implementation constructs an intelligent power routing matrix composed of a third control switch unit. Through a three-dimensional control architecture of "voltage mode perception - switch matrix reconstruction - bidirectional path isolation", it achieves low-latency dynamic switching between Type-C / solar input and target power source (such as lithium battery). The third control switch unit adopts a bidirectional MOSFET bridge topology, integrating a direction detection diode and a freewheeling circuit. The main control module 10 controls the switch matrix reconstruction through PWM+PWM' complementary drive signals based on the working mode signal (such as charging / discharging status) output by the voltage adjustment module 20, forming an intelligent routing node with bidirectional charge transmission, path electrical isolation, and backflow protection. By decoupling the routing at the hardware level, the system can simultaneously optimize charging and discharging efficiency while supporting solar input and bidirectional Type-C fast charging. It also suppresses voltage fluctuations during charging and discharging mode switching, providing an all-weather, uninterrupted hybrid power supply solution for battery devices in scenarios such as field monitoring and emergency communication.

[0169] This application also proposes a charging and discharging system, which includes a target battery and a charging and discharging control circuit. The specific structure of the charging and discharging control circuit is as described in the above embodiments. Since this charging and discharging system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0170] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A charging and discharging control circuit, characterized in that, The charging and discharging control circuit includes a main control module, a voltage adjustment module, a Type-C input / output module, and a solar input module; The main control module is communicatively connected to the voltage adjustment module, the Type-C input / output module, and the solar input module, respectively. The voltage adjustment module is electrically connected to the Type-C input / output module, the target battery, and the solar input module, respectively. The main control module is used to collect the first port signal of the Type-C input / output module and the second port signal of the solar input module, and adjust the working mode of the voltage adjustment module according to the first port signal and the second port signal to charge and discharge the target battery.

2. The charging and discharging control circuit as described in claim 1, characterized in that, The TypeC input / output module includes a protocol control unit and a TypeC input / output unit; The main control module is communicatively connected to the protocol control unit; The protocol control unit is communicatively connected to the Type-C input / output unit; The voltage adjustment module and the Type-C input / output unit are electrically connected; The protocol control unit is used to collect the first port signal of the Type-C input / output unit and forward the first port signal to the main control module.

3. The charging and discharging control circuit as described in claim 2, characterized in that, The TypeC input / output unit includes a TypeC port and a first control switch unit; The first control switch unit is electrically connected to the Type-C port and the voltage adjustment module respectively, and the first control switch unit is communicatively connected to the protocol control unit; The main control module is used to output a corresponding first switch control signal to the protocol control unit based on the first port signal and the second port signal; The protocol control unit is used to control the on / off state of the first control switch unit according to the first switch control signal.

4. The charge / discharge control circuit as described in claim 3, characterized in that, The first control switch unit includes: The first field-effect transistor, the source of the first field-effect transistor is connected to the Type-C port; The drain of the second field-effect transistor is connected to the drain of the first field-effect transistor, and the source of the second field-effect transistor is connected to the voltage adjustment module. The third field-effect transistor has its drain connected to the gate of the first field-effect transistor and the gate of the second field-effect transistor, and its source connected to the first power supply ground terminal.

5. The charge / discharge control circuit as described in claim 1, characterized in that, The solar input module includes a solar input port, a filtering unit, and a second control switch unit; The main control module is communicatively connected to the second control switch unit; The filtering unit is electrically connected to the solar energy input port and the second control switch unit, respectively. The second control switch unit is electrically connected to the voltage adjustment module; The main control module is used to output a corresponding second switch control signal to the second control switch unit according to the first port signal and the second port signal, so as to control the on and off of the second control switch unit.

6. The charge / discharge control circuit as described in claim 5, characterized in that, The filtering unit includes: A fuse, the first end of which is connected to the solar input port; A first Zener diode, the first end of which is connected to the second end of the fuse, and the second end of which is connected to the solar input port; An inductor, wherein the first end of the first coil of the inductor is connected to the second end of the fuse, the second end of the first coil of the inductor is connected to the second control switch unit, the first end of the second coil of the inductor is connected to the solar input port, and the second end of the second coil of the inductor is connected to the second power ground terminal.

7. The charge / discharge control circuit as described in claim 5, characterized in that, The second control switch unit includes: A fourth field-effect transistor, the drain of which is connected to the filter unit; The second Zener diode has its cathode connected to the source of the fourth field-effect transistor and its anode connected to the gate of the fourth field-effect transistor. The fifth field-effect transistor has its source connected to the source of the fourth field-effect transistor, its drain connected to the voltage adjustment module, and its gate connected to the gate of the fourth field-effect transistor. A first resistor, the first end of which is connected to the gate of the fourth field-effect transistor and the gate of the fifth field-effect transistor; The sixth field-effect transistor has its drain connected to the second terminal of the first resistor and its source connected to the second power supply ground terminal. The second resistor has its first end connected to the gate of the sixth field-effect transistor and its second end connected to the main control module.

8. The charge / discharge control circuit as described in claim 1, characterized in that, The voltage adjustment module includes a buck-boost chip and a third control switch unit. The buck-boost chip is communicatively connected to the main control module and the third control switch unit, respectively. The third control switch unit is electrically connected to the Type-C input / output module, the solar input module, and the target battery, respectively. The third control switch unit is used to switch the connection between the Type-C input / output module and the solar input module and the target power source according to the working mode of the buck-boost chip.

9. The charge / discharge control circuit as described in claim 8, characterized in that, The third control switch unit includes: The seventh field-effect transistor has its drain connected to the first control switch unit or the second control switch unit, and its source connected to the voltage adjustment module. The eighth field-effect transistor has its drain connected to the voltage adjustment module and its source connected to the first power supply ground terminal. The third resistor has its first end connected to the gate of the seventh field-effect transistor and its second end connected to the voltage adjustment module. The fourth resistor has its first end connected to the gate of the eighth field-effect transistor and its second end connected to the voltage adjustment module. An inductor, the first end of which is connected to the source of the seventh field-effect transistor; A ninth field-effect transistor, wherein the source of the ninth field-effect transistor is connected to the second terminal of the inductor, and the drain of the ninth field-effect transistor is connected to the target battery; The tenth field-effect transistor has its drain connected to the second terminal of the inductor and its source connected to the first power supply ground terminal. The fifth resistor has its first end connected to the gate of the tenth field-effect transistor and its second end connected to the voltage adjustment module. The sixth resistor has its first end connected to the gate of the ninth field-effect transistor and its second end connected to the voltage adjustment module.

10. A charging and discharging system, characterized in that, The charging and discharging system includes a target battery and a charging and discharging control circuit as described in any one of claims 1 to 9.

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