Full-protocol multi-scene application charging and discharging circuit

Abstract

The utility model discloses a full-protocol multi-scene application charging and discharging circuit, which comprises a battery bin circuit with a plurality of lithium batteries connected in series, a lithium battery protection system circuit and a battery charging and discharging system circuit, and the battery charging and discharging system circuit comprises a fast charging control and management system circuit, a wireless charging system and a solar charging system. The multi-lithium battery series battery compartment circuit is in two-way communication connection with the lithium battery protection system circuit, and the lithium battery protection system circuit is in two-way communication connection with the battery charging and discharging system circuit; the lithium battery protection system circuit is in communication connection with the fast charging control and management system circuit, the wireless charging system and the solar charging system. By using the full-protocol multi-scene application charging and discharging circuit provided by the utility model, a convenient and reliable charging solution is provided for various users.

Description

Technical Field

[0001] The utility model relates to the technical field of battery life, and in particular to a charging and discharging circuit for full-protocol multi-scenario applications. Background Art

[0002] With the rapid development of smart technology, smart mobile terminals have gradually occupied a dominant position in the market, and various high-tech electronic products have continued to emerge, profoundly changing people's lifestyles. These electronic products not only bring us convenience and efficiency, but also become an indispensable part of our lives. However, the battery life issue has become a key factor restricting its further development. The current mobile charging power supply generally does not have full protocol compatibility, multi-scenario application, solar charging and wireless charging functions, and cannot provide convenient and reliable charging solutions for various users. Therefore, it is necessary to design a new full-protocol multi-scenario application charging and discharging circuit to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to propose a charging and discharging circuit for full-protocol and multi-scenario applications to solve at least one technical problem existing in the above-mentioned prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A charging and discharging circuit for full-protocol multi-scenario applications, including a multi-cell lithium battery series battery compartment circuit, a lithium battery protection system circuit, and a battery charging and discharging system circuit. The battery charging and discharging system circuit includes a fast charging control and management system circuit, a wireless charging system, and a solar charging system;

[0006] The multi-cell lithium battery series battery compartment circuit is bidirectionally connected to the lithium battery protection system circuit, and the lithium battery protection system circuit is bidirectionally connected to the battery charging and discharging system circuit; the lithium battery protection system circuit is respectively connected to the fast charging control and management system circuit, the wireless charging system and the solar charging system;

[0007] The fast charging control and management system circuit is connected to the Type-C cable and the micro-USB cable respectively;

[0008] The wireless charging system includes a wireless charging emitter control and management circuit and a wireless transmitting coil.

[0009] As a preferred embodiment of the present invention, the lithium battery protection system circuit of the present invention adopts a chip of model BM3451, and the chip of BM3451 specifically includes:

[0010] P1: It is the output port of the battery. Pin2 is connected to the output pole of four NMOS tubes, and Pin1 is connected to the positive pole of the series-connected battery. The output voltage is 12.8~16.8V;

[0011] BAT-: Connect to the negative terminal of the first battery pack;

[0012] B1+: Connect to the positive terminal of the first battery pack;

[0013] B2+: Connect to the positive terminal of the second battery pack;

[0014] B3+: Connect to the positive terminal of the third battery pack;

[0015] BAT+: Connect to the positive terminal of the fourth battery pack;

[0016] U2~U5 in the circuit: are general-purpose NMOS tubes, which are in the cut-off state by default and will only be turned on when the clamping voltage of the main control reaches 6.8V;

[0017] Capacitors C1, C2, C3, C8, and C9 in the circuit are bypass filter capacitors;

[0018] Resistors R26 and R28 in the circuit are high-power, low-resistance measuring resistors.

[0019] U6~U9 in the circuit are high-power NMOS tubes, which are the key to controlling overload in the circuit. The main control chip adjusts the gate voltage to regulate the conduction of the MOS tube.

[0020] R15 in the circuit is an NTC thermistor that can detect the temperature of the battery in real time, thereby affecting the conduction rate of the power MOS tube.

[0021] C4~C7 in the circuit: external capacitors that control the system protection delay. The protection delay can be changed by changing the value of the capacitor.

[0022] D1~D4 in the circuit are four battery detection LED lights. When there is a battery pack at the node where the LED is located, the LED light will light up, otherwise the LED light will go out.

[0023] As a preferred embodiment of the present invention, in the full-protocol 100-watt fast charging control and management system described in the present invention, the power management SOC and IP5389 are used as the core main control of the full-protocol 100-watt fast charging control and management system.

[0024] As a preferred embodiment of the present invention, the output end of the full-protocol 100-watt fast charging control and management system described in the present invention is connected to a TYPE-C bidirectional input and output circuit, a TYPE-A unidirectional output circuit, and a micro-USB single-ended input circuit.

[0025] As a preferred embodiment of the utility model, the solar charging control and management system of the utility model includes controllers U5 and U4, the U5 chip model is TPCA813, and the U4 chip model is CN3795, wherein:

[0026] VG: Internal voltage modulator output. Provide power for the internal drive circuit. Set a 100nF capacitor between the VG pin and the VCC pin;

[0027] nCHRG: Charging status indication terminal, open-drain output; in the charging state, the internal transistor pulls this pin to a low level; otherwise, this pin is in a high-impedance state;

[0028] MPPT: Maximum power point tracking terminal of solar panel. In the maximum power point tracking state of solar panel, the voltage of this pin is modulated to 1.205V. This pin needs an external resistor divider network to detect the voltage of solar panel;

[0029] COM: loop compensation input terminal, a 120Ω resistor and a 220nF capacitor are connected in series between this pin and ground;

[0030] FB: Battery voltage feedback input terminal, external resistor voltage divider network is connected to detect battery voltage;

[0031] BAT: Battery positive connection terminal and charging current detection negative input terminal. This pin is connected to the positive electrode of the battery. At the same time, this pin and CSP pin are used to measure the voltage across the current detection resistor RCS and feed this voltage signal back to CN3795 for current modulation.

[0032] CSP: Charging current detection positive input terminal. This pin and BAT pin are used to measure the voltage across the current detection resistor RCS and feed this voltage signal back to CN3795 for current modulation.

[0033] DRV: Gate drive terminal. Drives the gate of the off-chip P-channel MOS field effect transistor.

[0034] As a preferred embodiment of the present invention, the wireless charging emitter control and management system of the present invention adopts a 5W wireless charging emitter control SOC, the chip IP6826 is used as the core main control of the wireless charging circuit, and the chip IP6826 is used as the wireless charging transmitter management IC.

[0035] As a preferred embodiment of the present invention, the multi-cell lithium battery series-connected battery compartment of the present invention is 5 lithium batteries connected in series.

[0036] As a preferred embodiment of the present invention, the lithium battery of the present invention adopts a standard 4.2V specification 18650 battery pack.

[0037] Compared with the prior art, the charging and discharging circuit for full-protocol and multi-scenario applications provided by the utility model has the following beneficial effects:

[0038] 1. The utility model is provided with a battery protection circuit, which not only has the function of real-time status monitoring of voltage and current, but also can avoid potential risks such as overcharging, overdischarging and short circuit of the battery pack.

[0039] 2. The utility model sets up a full-protocol 100-watt two-way fast charging system. IP5389 serves as the core controller of the full-protocol 100-watt two-way fast charging circuit. It has full-protocol compatibility, multi-scenario application, and supports fast charging.

[0040] 3. The utility model is provided with a solar charging system. When the solar panel is used for power supply, the internal circuit can automatically track the maximum power point of the solar panel, without considering the worst case, and can maximize the use of the output power of the solar panel, which is very beneficial to the application of solar panel power supply.

[0041] 4. The utility model sets up a wireless charging system. IP6826 serves as the core control of the wireless charging circuit and can charge various electronic devices equipped with wireless charging receivers. It has a high degree of solution integration and can significantly reduce the solution size and BOM cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is the overall structure diagram of the utility model;

[0043] Figure 2 This is the circuit diagram of the lithium battery protection system of the utility model;

[0044] Figure 3 This is a wireless charging emitter control and management circuit diagram of the utility model;

[0045] Figure 4 This is the circuit diagram of the solar charging control and management system of the utility model;

[0046] Figure 5 This is the full-protocol 100-watt fast charging control and management circuit diagram of the utility model;

[0047] Figure 6 This is the EMARK circuit diagram of the 100-watt fast charge of the utility model;

[0048] Figure 7 This is the full protocol interface circuit diagram of the utility model. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0050] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0051] Please refer to the attached Figure 1-7 As shown, this embodiment provides a charging and discharging circuit for full-protocol multi-scenario applications, including a battery compartment with multiple lithium batteries connected in series, a lithium battery protection system and a battery charging and discharging system, wherein the battery charging and discharging system includes a full-protocol 100-watt fast charging control and management system, a wireless charging system and a solar charging system; the circuit of the battery compartment with multiple lithium batteries connected in series is bidirectionally communicatively connected to the lithium battery protection system circuit, and the lithium battery protection system circuit is bidirectionally communicatively connected to the battery charging and discharging system circuit; the lithium battery protection system circuit is respectively communicatively connected to the fast charging control and management system circuit, the wireless charging system and the solar charging system.

[0052] The full-protocol 100W fast-charging control and management system is transmitted via Type-C cable and micro-USB cable, and is output as power via Type-C and Type-A transmission;

[0053] The wireless charging system includes a wireless charging emitter control and management system integrated in the circuit and a wireless transmitting coil matched with a resonant capacitor inside the circuit;

[0054] The solar charging system integrates a PWM solar charging management protocol circuit, and completes the efficient charging of the mobile power supply under the action of a monocrystalline silicon photovoltaic panel.

[0055] In this embodiment, the charging and discharging circuit includes a battery compartment with multiple lithium batteries connected in series, a lithium battery protection system and a battery charging and discharging system. The battery protection circuit not only has the function of real-time status monitoring of voltage and current, but also can avoid potential risks such as overcharging, over-discharging and short circuit of the battery pack; the full-protocol 100-watt fast charging system uses Type-C cable or micro-USB cable for transmission. The system can automatically identify various charging protocols, quickly establish a handshake protocol and enter the 100-watt fast charging mode. At the same time, the power output of the system can be transmitted by Type-C or Type-A, and the output power can also be regulated by the handshake protocol, thereby entering the 100-watt fast charging mode;

[0056] The wireless charging system consists of a wireless charging emitter control system integrated in the circuit and an A11 / MP-2A wireless coil matched with a resonant capacitor inside the circuit. It can charge various electronic devices equipped with a wireless charging receiver.

[0057] The solar charging system integrates a PWM solar charging management protocol circuit, which can complete the efficient charging of the mobile power supply under the action of a monocrystalline silicon photovoltaic panel.

[0058] The utility model has full protocol compatibility, multi-scenario application, efficient solar charging and wireless charging functions, providing convenient and reliable charging solutions for all types of users.

[0059] The circuit of the lithium battery protection system adopts the BM3451 professional 3 / 4 / 5-cell rechargeable battery protection chip as the core control of the battery protection system; the multi-cell lithium battery series battery compartment is 5 lithium batteries connected in series; the lithium battery adopts a standard 4.2V specification 18650 battery pack.

[0060] In the full-protocol 100-watt bidirectional fast charging system, the power management SOC and IP5389 are used as the core main controller of the full-protocol 100-watt bidirectional fast charging circuit. IP5389 supports QC2.0 / QC3.0 / QC3+ output fast charging protocols, AFC / FCP / SCP / VOOC input and output fast charging protocols, USB C PD2.0 / PD3.0 input and output protocols, USB C PD3.0 PPS output protocol, compatible with BC1.2 / Apple mobile phone, synchronous bidirectional buck-boost converter, lithium battery charging management, battery power indication, etc. At the same time, the main controller supports four USB ports: USBA x2, USB C, USB B (or lightning port, or USBC), and any USB port can support fast charging when used alone.

[0061] In the solar charging system, a solar-powered PWM buck mode multi-cell battery charging management SOC is used. CN3795 is the core controller of the solar charging circuit. CN3795 supports independent management of multi-cell lithium battery charging and has trickle, constant current and constant voltage charging modes. In the constant voltage charging mode, CN3795 modulates the battery voltage to the voltage set by the external feedback resistor; in the constant current charging mode, the charging current is set by an external resistor.

[0062] In this embodiment, CN3795 supports independent management of multi-cell lithium battery charging, with trickle, constant current and constant voltage charging modes, which is very suitable for lithium battery, lithium iron phosphate battery and lithium titanate battery charging management. In constant voltage charging mode, CN3795 modulates the battery voltage at the voltage set by the external feedback resistor; in constant current charging mode, the charging current is set by an external resistor. When powered by solar panels, the internal circuit can automatically track the maximum power point of the solar panel, without considering the worst case, and can maximize the use of the output power of the solar panel, which is very beneficial for solar panel-powered applications.

[0063] In the wireless charging system, the emitter control SOC of 15W wireless charging, IP6826 as the core main control of the wireless charging circuit, IP6826 as the wireless charging transmitter management IC, compatible with the latest WPC Qi v1.3 standard, supports A11, A11a, MP-A2 coils, supports 5W, Apple 7.5W, Samsung 10W, 15W, IP6826 detects the presence of the wireless receiver through analog ping, and establishes communication with the receiving end to achieve power transmission, the decoding system obtains the communication data packet sent by the receiver, uses the PID algorithm to change the oscillation frequency and thus adjusts the output power on the coil, the IP6826 chip also integrates a full-bridge drive circuit and a full-bridge power MOS, and a voltage & current two-way ASK communication demodulation module; it has a high degree of solution integration and can significantly reduce the solution size and BOM cost.

[0064] like Figure 2 As shown, the circuit supports protection functions such as overcharge, over-discharge, discharge voltage overload, discharge current overload, short circuit, charge current overload and temperature protection for 4 lithium batteries, and the protection delay of overcharge, over-discharge and overcurrent can be adjusted by external capacitors.

[0065] P1: It is the output port of the battery. Pin2 is connected to the output poles of four NMOS tubes, and Pin1 is connected to the positive pole of the series-connected batteries. The output voltage is about 12.8~16.8V.

[0066] BAT-: Connect to the negative terminal of the first battery pack.

[0067] B1+: Connect to the positive terminal of the first battery pack.

[0068] B2+: Connect to the positive terminal of the second battery pack.

[0069] B3+: Connect the positive terminal of the third battery pack.

[0070] BAT+: Connect to the positive terminal of the fourth battery pack.

[0071] U2~U5: They are universal NMOS tubes, which are in cut-off state by default and will only be turned on when the clamping voltage of the main control reaches 6.8V.

[0072] C1 / C2 / C3 / C8 / C9: bypass filter capacitors.

[0073] R26 / R28: High-power, low-resistance measurement resistors.

[0074] U6~U9: They are high-power NMOS tubes, which are the key to controlling overload in this circuit. The main control chip adjusts the gate voltage to regulate the conduction of the MOS tube.

[0075] R15: It is an NTC thermistor that can detect the temperature of the battery in real time, thereby affecting the conduction rate of the power MOS tube.

[0076] C4~C7: External capacitors to control the system protection delay. The protection delay can be changed by changing the value of the capacitor.

[0077] D1~D4: Four battery detection LED lights. When there is a battery pack at the node where the LED is located, the LED light will light up, otherwise the LED light will go out.

[0078] like Figure 2 As shown in the figure, in this circuit, BM3451 mainly controls the output current through four high-power NMOS tubes. When a short circuit occurs in the external circuit or the battery is discharged too much, BM3451 will drive the NMOS tube to control the output of the current, and finally reach a balance through feedback adjustment. At the same time, combined with the temperature control detection of the NTC resistor, the safe temperature of the battery is detected to prevent excessive heat generated by excessive charge and discharge current, which may cause damage to the battery and protect the battery.

[0079] like Figure 3 As shown, U2 is a 16-pin Type-c female connector that can be used to directly power IP6826.

[0080] JP1: Battery compartment input port, input voltage range is 5V~16V.

[0081] U1: IP6826 main control chip.

[0082] IGND: Current communication / demodulation negative input.

[0083] ISENSE: Current communication / demodulation positive input, built-in two-way ASK demodulation modules, can collect coil voltage and current for ASK communication demodulation and decoding. Obtain the signal through the resistor and send it to the chip for digital demodulation and decoding.

[0084] PGND: Power ground of the internal power MOSFET, connected to external 20.

[0085] CC1 / CC2: Type_C detection pins CC1 / CC2.

[0086] LOSS_THR: Dynamic FOD parameter adjustment, adjusted by connecting an external resistor to GND. IP6829 can adjust the sensitivity of dynamic FOD by connecting an external resistor to GND through the LOSS_THR pin; the LOSS_THR pin is default connected to a 100K resistor to ground, using the standard dynamic FOD sensitivity; the larger the external resistor R_Loss connected to LOSS_THR, the lower the sensitivity of dynamic FOD, and it is less likely to detect FOD; only the resistor on the LOSS_THR pin is detected during power-on to set the sensitivity of dynamic FOD; 50K < R_LOSS resistor < 130K.

[0087] V_DECODE: Voltage communication / demodulation input.

[0088] BST1: Internal high-voltage drive, connect a capacitor to LX1

[0089] LX1 / LX2 / LX3 / LX4: H-bridge switch nodes 1 / 2 / 3 / 4.

[0090] VDET: Voltage detection input. IP6829 can adjust the sensitivity of static FOD by adjusting the capacitor on the V_DET pin; default connected to a 2.2nF capacitor to ground, using the standard static FOD sensitivity; the larger the connected capacitor, the higher the sensitivity of static FOD, and it is easier to detect foreign objects.

[0091] NTC: The NTC pin of IP6829 fixedly outputs a current of 20uA. The NTC PIN judges the NTC temperature by sampling the voltage of the NTC pin; this shutdown characteristic provides enhanced applications, not limited to thermal shutdown. When the voltage of the NTC pin is less than 0.5V, the system will enter the NTC protection state and end power transmission; after entering the NTC protection, when the voltage of the NTC pin is greater than 0.72V, normal charging will be restored; if the NTC application is not used, this pin is grounded through a 100K resistor.

[0092] Such as Figure 3As shown, the wireless charging circuit is implemented by an IP6826, and the circuit exists as the transmitter in wireless transmission, with an input voltage of 5V to 16V. For this reason, the chip can choose to establish a transmission protocol with an external adapter through a Type-C line, thereby opening the PD or QC transmission protocol. The transmission voltage can be 12V, or it can be directly powered by a 12.6 battery compartment, which can also achieve normal operation of wireless transmission. The wireless charging of this circuit is achieved by converting electrical energy into high-frequency pulse electrical signals. The high-frequency pulse electrical signals pass through a magnetic induction coil of a specific specification and a capacitor of a specific value, so that the high-frequency electrical energy signal can be radiated outward. When in standby mode, IP6826 will always detect foreign objects near the coil, and judge whether wireless charging needs to be enabled through feedback adjustment. At the same time, the chip has NTC temperature control detection inside, which can detect the temperature of the circuit board at all times, and can well detect the safe temperature to ensure safe operation.

[0093] like Figure 4 As shown, VG: internal voltage modulator output. Provide power for the internal drive circuit. A 100nF capacitor needs to be connected between the VG pin and the VCC pin.

[0094] nCHRG: Charging status indication terminal. Open drain output. In the charging state, the internal transistor pulls this pin to a low level; otherwise, this pin is in a high impedance state.

[0095] MPPT: Maximum power point tracking terminal of solar panel. In the maximum power point tracking state of solar panel, the voltage of this pin is modulated to 1.205V. This pin needs an external resistor divider network to detect the voltage of solar panel.

[0096] COM: Loop compensation input terminal. A 120Ω resistor and a 220nF capacitor are connected in series between this pin and ground.

[0097] FB: Battery voltage feedback input terminal. An external resistor divider network is used to detect the battery voltage.

[0098] BAT: Battery positive connection terminal and charging current detection negative input terminal. This pin is connected to the positive electrode of the battery. At the same time, this pin and the CSP pin are used to measure the voltage across the current detection resistor RCS and feed this voltage signal back to CN3795 for current modulation.

[0099] CSP: Charging current detection positive input terminal. This pin and BAT pin are used to measure the voltage across the current detection resistor RCS and feed this voltage signal back to CN3795 for current modulation.

[0100] DRV: Gate drive terminal. Drives the gate of the off-chip P-channel MOS field effect transistor.

[0101] like Figure 4 As shown, when the electric energy generated by the solar photovoltaic panel is lower than the battery voltage, the U5 (TPCA813) P_MOS tube and the U1 diode prevent the current from flowing back. Only when the voltage generated by the photovoltaic panel is higher than the battery voltage, U5, U2 and U1 will be forward-conducted. The circuit has a very good design that the battery voltage value can be preset by adjusting the sliding rheostat of R7, so that it can adapt to different types of photovoltaic panels, and the maximum power point tracking of the solar cell of the circuit can be adjusted by adjusting the sliding rheostat of R8. The voltage of the MPPT pin of the maximum power point tracking end of the CN3795 solar panel is modulated at 1.205V, and the voltage divider network composed of the two resistors R5 and R8 outside the chip can realize the tracking of the maximum power point of the solar panel.

[0102] like Figure 5 As shown, the circuit uses IP5389 as the main control, and the battery capacity and voltage range are regulated through the peripheral resistors R9, R10, R8, R26, and R11. The voltage conversion is inseparable from the H-bridge structure composed of four NMOS tubes and inductors. The bridge structure can realize the DCDC conversion of voltage under the action of IP5389. When the handshake protocol of the voltage input is that the input voltage is lower than the battery compartment, the main control can regulate the bridge to achieve boost. Conversely, when the handshake protocol is that the input voltage is higher than the battery compartment voltage, the main control regulates the bridge to achieve the function of stepping down. The bridge plays a very important role in both the input and output of electric energy.

[0103] At the same time, the chip has built-in NTC detection, which can detect the temperature of the voltage compartment in real time to ensure the safety of battery charging and discharging.

[0104] At the input and output of the circuit, bypass capacitors play a very important role in circuit filtering and overall circuit stability. And the four LED lights are used as power level display. The selection of R22 and R23 must meet the requirements of high current, and the selection of the four NMOS tubes must also meet the requirements of high power, large current and low internal resistance.

[0105] When R2 selects a 27K resistor, it needs to be used with an EMARK circuit to normally drive 100-watt fast charging transmission.

[0106] like Figure 6As shown, in the full-protocol 100W bidirectional fast charging system, the 100W drive circuit uses the EMARK control circuit as the driving core. The EMARK circuit is a common enabling circuit attached to the 100W fast charging series master control. This circuit usually requires a 100W start-up control program inside the chip. Through two special pins, the signal on the CC line can be converted into a 100W handshake protocol request. Under the same conditions, without the support of this circuit, the IP5389 series chips can only enable a maximum charging and discharging power of 65W. Adding the EMARK circuit can inject 100W input and output requests into the CC line, thereby meeting the 100W fast charging needs.

[0107] The EMARK circuit is a complete circuit system independent of the IP5389 circuit. It requires additional conversion of the battery compartment voltage to output a stable 5V voltage for the two PMOS tubes and two NMOS tubes to work normally.

[0108] like Figure 7 As shown, IP5389 not only supports full-protocol input, but also supports full-protocol 100-watt fast charging in terms of output. In terms of input, Type-C is the main input channel, with PD protocol and QC protocol, etc., while micro-USB mainly uses QC protocol as input mode. When outputting, Type-C can still be used as an output port. At the same time, it also supports two Type-A ports with QC protocol. At each interface, an NMOS tube is connected. When there is a demand for power transfer, the main control chip will actively detect the voltage value change of the interface to determine whether to turn on the NMOS tube.

[0109] The purpose of using parallel bypass capacitors near the interface is to increase the bypass filtering effect and make the input voltage value more stable.

[0110] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A charging and discharging circuit for full-protocol multi-scenario applications, characterized by: It includes a multi-cell lithium battery series battery compartment circuit, a lithium battery protection system circuit and a battery charging and discharging system circuit. The battery charging and discharging system circuit includes a fast charging control and management system circuit, a wireless charging system and a solar charging system; The multi-cell lithium battery series battery compartment circuit is bidirectionally connected to the lithium battery protection system circuit, and the lithium battery protection system circuit is bidirectionally connected to the battery charging and discharging system circuit; the lithium battery protection system circuit is respectively connected to the fast charging control and management system circuit, the wireless charging system and the solar charging system; The fast charging control and management system circuit is connected to the Type-C cable and the micro-USB cable respectively; The wireless charging system includes a wireless charging emitter control and management circuit and a wireless transmitting coil.

2. According to claim 1, a charging and discharging circuit for full-protocol multi-scenario applications is characterized in that: The lithium battery protection system circuit adopts a chip model BM3451, and the BM3451 chip specifically includes: P1: It is the output port of the battery. Pin2 is connected to the output pole of four NMOS tubes. Pin1 is connected to the positive pole of the series-connected battery. The output voltage is 12.8~16.8V. BAT-: Connect to the negative terminal of the first battery pack; B1+: Connect to the positive terminal of the first battery pack; B2+: Connect to the positive terminal of the second battery pack; B3+: Connect to the positive terminal of the third battery pack; BAT+: Connect to the positive terminal of the fourth battery pack; U2~U5 in the circuit: are general-purpose NMOS tubes, which are in the cut-off state by default and will only be turned on when the clamping voltage of the main control reaches 6.8V; Capacitors C1, C2, C3, C8, and C9 in the circuit are bypass filter capacitors; Resistors R26 and R28 in the circuit: high-power, low-resistance measuring resistors; U6~U9 in the circuit: high-power NMOS tubes are the key to controlling overload in the circuit. The main control chip adjusts the gate voltage to regulate the conduction of the MOS tube. R15 in the circuit: It is an NTC thermistor that detects the temperature of the battery in real time, thereby affecting the conduction rate of the power MOS tube; C4~C7 in the circuit: external capacitors that control the system protection delay. The protection delay can be changed by changing the value of the capacitor. D1~D4 in the circuit are four battery detection LED lights. When there is a battery pack at the node where the LED is located, the LED light will light up, otherwise the LED light will go out.

3. According to claim 1, a charging and discharging circuit for full-protocol multi-scenario applications is characterized in that: In the full-protocol 100-watt fast charging control and management system, the power management SOC and IP5389 are used as the core main control of the full-protocol 100-watt fast charging control and management system.

4. According to claim 3, a charging and discharging circuit for full-protocol multi-scenario applications is characterized in that: The output end of the full-protocol 100-watt fast charging control and management system is connected to the TYPE-C bidirectional input and output circuit, the TYPE-A unidirectional output circuit, and the micro-USB single-ended input circuit.

5. According to claim 1, a charging and discharging circuit for full-protocol multi-scenario applications is characterized in that: The solar charging control and management system includes controllers U5 and U4, the U5 chip model is TPCA813, and the U4 chip model is CN3795, wherein: VG: internal voltage modulator output, providing power for the internal drive circuit. A 100nF capacitor is set between the VG pin and the VCC pin. nCHRG: Charging status indication terminal, open-drain output; in the charging state, the internal transistor pulls this pin to a low level; otherwise, this pin is in a high-impedance state; MPPT: Maximum power point tracking terminal of solar panel. In the maximum power point tracking state of solar panel, the voltage of this pin is modulated to 1.205V. This pin needs an external resistor divider network to detect the voltage of solar panel. COM: loop compensation input terminal, a 120Ω resistor and a 220nF capacitor are connected in series between this pin and ground; FB: Battery voltage feedback input terminal, external resistor voltage divider network is connected to detect battery voltage; BAT: Battery positive connection terminal and charging current detection negative input terminal. This pin is connected to the positive electrode of the battery. At the same time, this pin and CSP pin are used to measure the voltage across the current detection resistor RCS and feed this voltage signal back to CN3795 for current modulation. CSP: Charging current detection positive input terminal. This pin and BAT pin are used to measure the voltage across the current detection resistor RCS and feed this voltage signal back to CN3795 for current modulation. DRV: Gate drive terminal, drives the gate of the off-chip P-channel MOS field effect transistor.

6. According to claim 1, a charging and discharging circuit for full-protocol multi-scenario applications is characterized in that: The wireless charging emitter control and management system adopts a 5W wireless charging emitter control SOC, the chip IP6826 is used as the core main control of the wireless charging circuit, and the chip IP6826 is used as the wireless charging transmitter management IC.

7. The charging and discharging circuit for full-protocol multi-scenario applications according to claim 1 is characterized in that: The multi-cell lithium battery series battery compartment contains 5 lithium batteries connected in series.

8. The charging and discharging circuit for full-protocol multi-scenario applications according to claim 7 is characterized in that: The lithium battery adopts a standard 4.2V 18650 battery pack.

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