A BMS management system intelligent wake-up circuit

Abstract

The present invention discloses a BMS management system intelligent wake-up circuit, including a charging wake-up circuit, a discharging wake-up circuit, a resistor R3, and field-effect transistors Q3 and Q5. The positive electrode P+ of an external power supply or load is connected to the positive power supply B+ of a lithium battery through a terminal J6. The negative electrode B- of the lithium battery is connected to one end of the resistor R3 through a terminal J6. The other end of the resistor R3 is connected to the source of the field-effect transistor Q3. The drain of the field-effect transistor Q3 is connected to the drain of the field-effect transistor Q5. The source of the field-effect transistor Q5 is connected to the negative electrode P- of the external power supply or load through a terminal J4. The gates of the field-effect transistor Q3 and the field-effect transistor Q5 are both connected to a single-chip microcomputer drive control circuit. The charging wake-up circuit and the discharging wake-up circuit are arranged in parallel between the field-effect transistor Q5 and the terminal J4 and are both connected to the source of the field-effect transistor Q5. The present invention adopts a pure hardware method for intelligent wake-up, without the need for multiple wiring, and can also effectively solve the problem of ignition when charging.

Description

Technical Field

[0001] The present invention relates to an intelligent wake-up circuit for a BMS management system, belonging to the technical field of wake-up circuits. Background Art

[0002] The BMS management system has a wide range of applications, ranging from large-scale energy storage systems and electric vehicles to shared bicycles and shared bikes. When the battery pack is not working, in order to reduce the system's operating current, it needs to be put into sleep mode. Powering on the system again after sleep involves a wake-up circuit, but the more common measure currently used on the market is to add an extra signal line, which is short-circuited with the positive electrode B+ of the battery pack to wake up the system. Summary of the Invention

[0003] In order to solve the shortcomings of the existing technology, the present invention provides a BMS management system intelligent wake-up circuit, which adopts pure hardware to perform intelligent wake-up, does not require multiple wiring, and can also effectively solve the problem of ignition during charging.

[0004] The technical solution adopted in the present invention is:

[0005] A BMS management system intelligent wake-up circuit includes a charging wake-up circuit, a discharging wake-up circuit, a resistor R3 and field effect transistors Q3 and Q5. The positive electrode P+ of the external power supply or load is connected to the terminal J6 of the positive electrode B+ of the lithium battery through the terminal J6. The negative electrode B- of the lithium battery is connected to one end of the resistor R3 through the terminal J6. The other end of the resistor R3 is connected to the source of the field effect transistor Q3. The drain of the field effect transistor Q3 is connected to the drain of the field effect transistor Q5. The source of the field effect transistor Q5 is connected to the terminal J6. The wire terminal J4 is connected to the negative electrode P- of the external power supply or load, and the gates of the field-effect transistors Q3 and Q5 are both connected to the microcontroller drive control circuit; the charging wake-up circuit and the discharging wake-up circuit are arranged in parallel between the field-effect transistor Q5 and the wiring terminal J4 and are both connected to the source of the field-effect transistor Q5. The charging wake-up circuit and the discharging wake-up circuit are both connected to the microcontroller for sending charging wake-up signals and discharging wake-up signals to the microcontroller and controlling the field-effect transistors Q3 and Q5 to be turned on through the microcontroller drive control circuit to establish a circulation loop.

[0006] Preferably, the charging wake-up circuit includes diodes D15, D16, D17, transistors Q16, Q24, capacitors C9, C10 and resistors R92, R93, R94, R95, R96, the cathode of the diode D17 is connected to the source of the field effect transistor Q5, the anode of the diode D17 is respectively connected to the emitter of the transistor Q16, one electrode of the capacitor C9 and one end of the resistor R96, the base of the transistor Q16, the other electrode of the capacitor C9 and the other end of the resistor R96 are all connected to one end of the resistor R95, the other end of the resistor R95 is grounded GND, and the collector of the transistor Q16 is connected to the cathode of the diode D16. The anode of the diode D16 is connected to one end of the resistor R94, the other end of the resistor R94 is respectively connected to the base of the transistor Q24, one end of the resistor R93 and one end of the capacitor C10, the emitter of the transistor Q24, the other end of the resistor R93 and the other end of the capacitor C10 are all connected to the linear buck module in the BMS management system, and the linear buck module supplies power to the charging wake-up circuit through VBAT. The collector of the transistor Q24 is connected to one end of the resistor R92, the other end of the resistor R92 is connected to the anode of the diode D15, and the cathode of the diode D15 is connected to the microcontroller for sending a charging wake-up signal to the microcontroller.

[0007] Further preferably, the discharge wake-up circuit includes diodes D9, D14, D19, D20, D21, transistors Q23, Q25 and resistors R91, R96, R97, R99, R100, R101, the positive electrode of the diode D19 is connected to the source of the field effect transistor Q5, the negative electrode of the diode D19 is connected to one end of the resistor R96, the other end of the resistor R96 is connected to one end of the resistor R100, and the other end of the resistor R100 is respectively connected to the negative electrode of the diode D21 and the gate of the transistor Q25, the positive electrode of the diode D21 and the source of the transistor Q25 are connected to the ground GND, and the drain of the transistor Q25 is respectively connected to the negative electrode of the diode D9 and the resistor R9 7 is connected to one end of the resistor R99, the anode of the diode D9 is connected to one end of the resistor R101, the other end of the resistor R99 is connected to the anode of the diode D20, the cathode of the diode D20 is connected to one end of the resistor R91 and the gate of the transistor Q23, the other end of the resistor R91 is grounded GND, the drain of the transistor Q23 is connected to the anode of the diode D14, the cathode of the diode D14 is connected to the microcontroller for sending a discharge wake-up signal to the microcontroller, the source of the transistor Q23, the other end of the resistor R97, and the other end of the resistor R101 are all connected to the linear buck module in the BMS management system, and the linear buck module supplies power to the discharge wake-up circuit through VBAT.

[0008] Further preferably, the collector of the transistor Q24 is also connected to the single chip microcomputer for sending a charging detection signal to the single chip microcomputer.

[0009] Further preferably, the anode of the diode D9 is also connected to the single chip microcomputer for sending a discharge detection signal to the single chip microcomputer.

[0010] The beneficial effects of the present invention are:

[0011] A pure hardware wake-up circuit including a charging wake-up circuit and a discharging wake-up circuit is used to intelligently wake up the battery. No additional signal line control is required. It is highly portable and low-cost, and can also effectively solve the problem of battery misfire during charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 1 is a circuit diagram of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 As shown: This embodiment is a BMS management system intelligent wake-up circuit, including a charging wake-up circuit, a discharging wake-up circuit, a resistor R3 and field effect transistors Q3 and Q5. The positive electrode P+ of the external power supply or load is connected to the terminal J6 of the positive electrode B+ of the lithium battery through the terminal J6. The two terminals J6 are connected by a fuse to form a connecting line. The negative electrode B- of the lithium battery is connected to one end of the resistor R3 through the terminal J6. The other end of the resistor R3 is connected to the source of the field effect transistor Q3, and the drain of the field effect transistor Q3 is connected to the drain of the field effect transistor Q5. The source of the field effect transistor Q5 is connected to the negative electrode P- of the external power supply or load through the terminal J4. The gates of the field effect transistors Q3 and Q5 are both connected to the single-chip microcomputer drive control circuit; the charging wake-up circuit and the discharging wake-up circuit are arranged in parallel between the field effect transistor Q5 and the terminal J4 and are both connected to the source of the field effect transistor Q5. The charging wake-up circuit and the discharging wake-up circuit are both connected to the single-chip microcomputer for sending charging wake-up signals and discharging wake-up signals to the single-chip microcomputer and controlling the field effect transistors Q3 and Q5 to be turned on through the single-chip microcomputer drive control circuit to establish a circulation loop.

[0015] The charging wake-up circuit includes diodes D15, D16, D17, transistors Q16, Q24, capacitors C9, C10 and resistors R92, R93, R94, R95 and R96. The cathode of diode D17 is connected to the source of field effect transistor Q5, and the anode of diode D17 is connected to the emitter of transistor Q16, one electrode of capacitor C9 and one end of resistor R96 respectively. The base of transistor Q16, the other electrode of capacitor C9 and the other end of resistor R96 are all connected to one end of resistor R95. The other end of resistor R95 is grounded to GND. The collector of transistor Q16 is connected to the cathode of diode D16. The positive electrode of diode D16 is connected to one end of resistor R94, and the other end of resistor R94 is respectively connected to the base of transistor Q24, one end of resistor R93 and one end of capacitor C10. The emitter of transistor Q24, the other end of resistor R93 and the other end of capacitor C10 are all connected to the linear buck module in the BMS management system. The linear buck module supplies power to the charging wake-up circuit through VBAT. The collector of transistor Q24 is connected to one end of resistor R92, and the other end of resistor R92 is connected to the positive electrode of diode D15. The negative electrode of diode D15 is connected to the microcontroller for sending a charging wake-up signal to the microcontroller.

[0016] The discharge wake-up circuit includes diodes D9, D14, D19, D20, and D21, transistors Q23 and Q25, and resistors R91, R96, R97, R99, R100, and R101. The anode of diode D19 is connected to the source of field-effect transistor Q5, the cathode of diode D19 is connected to one end of resistor R96, the other end of resistor R96 is connected to one end of resistor R100, and the other end of resistor R100 is respectively connected to the cathode of diode D21 and the gate of transistor Q25. The anode of diode D21 and the source of transistor Q25 are connected to ground GND. The drain of transistor Q25 is respectively connected to the cathode of diode D9 and one end of resistor R97. And one end of the resistor R99, the anode of the diode D9 is connected to one end of the resistor R101, the other end of the resistor R99 is connected to the anode of the diode D20, the cathode of the diode D20 is connected to one end of the resistor R91 and the gate of the transistor Q23, the other end of the resistor R91 is grounded GND, the drain of the transistor Q23 is connected to the anode of the diode D14, the cathode of the diode D14 is connected to the microcontroller for sending a discharge wake-up signal to the microcontroller, the source of the transistor Q23, the other end of the resistor R97, and the other end of the resistor R101 are all connected to the linear buck module in the BMS management system, and the linear buck module supplies power to the discharge wake-up circuit through VBAT.

[0017] The collector of the transistor Q24 is also connected to the single chip microcomputer for sending a charge detection signal CHG_DEC to the single chip microcomputer.

[0018] The anode of the diode D9 is also connected to the single chip microcomputer for sending a discharge detection signal LOAD_DEC to the single chip microcomputer.

[0019] Charge wake-up:

[0020] After the BMS management system goes into sleep mode, the field-effect transistors Q3 and Q5 are disconnected. When the charger is plugged in for charging, the voltage between the negative electrode B- of the battery and the negative electrode P- of the external power supply is equivalent to the battery voltage. At this time, the field-effect transistors Q16 and Q24 are turned on, and the linear buck module outputs the WAKE_UP wake-up signal to the microcontroller through VBAT via the field-effect transistor Q24. The microcontroller drive control circuit of the microcontroller controls the field-effect transistors Q3 and Q5 to turn on to establish a circulation loop, so that the external power supply can charge the battery.

[0021] Discharge wake-up:

[0022] After the BMS management system goes into sleep mode, field-effect transistors Q3 and Q5 are disconnected. When the load is connected, the voltage between the negative electrode B- of the battery and the negative electrode P- of the load is equivalent to the battery voltage. At this time, field-effect transistor Q25 is turned on, the voltage at the negative electrode of diode D9 is pulled down, and the gate of field-effect transistor Q23 drops to a low voltage, causing field-effect transistor Q23 to be turned on. The linear buck module outputs a WAKE_UP wake-up signal to the microcontroller through VBAT via field-effect transistor Q23. The microcontroller drive control circuit of the microcontroller controls field-effect transistors Q3 and Q5 to be turned on to establish a circulation loop, so that the battery can power the load.

[0023] The above is only a preferred embodiment of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A BMS management system intelligent wake-up circuit, including a charging wake-up circuit, a discharging wake-up circuit, a resistor R3, and field effect transistors Q3 and Q5, characterized in that: The positive electrode P+ of the external power supply or load is connected to the terminal J6 of the positive electrode B+ of the lithium battery through the terminal J6, the negative electrode B- of the lithium battery is connected to one end of the resistor R3 through the terminal J6, the other end of the resistor R3 is connected to the source of the field effect transistor Q3, the drain of the field effect transistor Q3 is connected to the drain of the field effect transistor Q5, the source of the field effect transistor Q5 is connected to the negative electrode P- of the external power supply or load through the terminal J4, and the gates of the field effect transistor Q3 and the field effect transistor Q5 are both connected to the single-chip microcomputer drive control circuit; the charging wake-up circuit and the discharging wake-up circuit are arranged in parallel between the field effect transistor Q5 and the terminal J4 and are both connected to the source of the field effect transistor Q5. The charging wake-up circuit and the discharging wake-up circuit are both connected to the single-chip microcomputer for sending charging wake-up signals and discharging wake-up signals to the single-chip microcomputer and controlling the field effect transistors Q3 and Q5 to be turned on through the single-chip microcomputer drive control circuit to establish a circulation loop; The charging wake-up circuit includes diodes D15, D16, D17, transistors Q16, Q24, capacitors C9, C10 and resistors R92, R93, R94, R95 and R96. The cathode of diode D17 is connected to the source of field effect transistor Q5, and the anode of diode D17 is connected to the emitter of transistor Q16, one electrode of capacitor C9 and one end of resistor R96 respectively. The base of transistor Q16, the other electrode of capacitor C9 and the other end of resistor R96 are all connected to one end of resistor R95. The other end of resistor R95 is grounded to GND. The collector of transistor Q16 is connected to the cathode of diode D16. The anode of diode D16 is connected to one end of resistor R94. The other end of resistor R94 is respectively connected to the base of transistor Q24, one end of resistor R93, and one end of capacitor C10. The emitter of transistor Q24, the other end of resistor R93, and the other end of capacitor C10 are all connected to the linear buck module in the BMS management system. The linear buck module supplies power to the charging wake-up circuit through VBAT. The collector of transistor Q24 is connected to one end of resistor R92. The other end of resistor R92 is connected to the anode of diode D15. The cathode of diode D15 is connected to the microcontroller to send a charging wake-up signal to the microcontroller. The discharge wake-up circuit includes diodes D9, D14, D19, D20, and D21, transistors Q23 and Q25, and resistors R91, R96, R97, R99, R100, and R101. The anode of the diode D19 is connected to the source of the field effect transistor Q5, the cathode of the diode D19 is connected to one end of the resistor R96, the other end of the resistor R96 is connected to one end of the resistor R100, and the other end of the resistor R100 is respectively connected to the cathode of the diode D21 and the gate of the transistor Q25. The anode of the diode D21 and the source of the transistor Q25 are connected to the ground GND. The drain of the transistor Q25 is respectively connected to the cathode of the diode D9 and one end of the resistor R97. And one end of the resistor R99, the anode of the diode D9 is connected to one end of the resistor R101, the other end of the resistor R99 is connected to the anode of the diode D20, the cathode of the diode D20 is connected to one end of the resistor R91 and the gate of the transistor Q23, the other end of the resistor R91 is grounded GND, the drain of the transistor Q23 is connected to the anode of the diode D14, the cathode of the diode D14 is connected to the microcontroller for sending a discharge wake-up signal to the microcontroller, the source of the transistor Q23, the other end of the resistor R97, and the other end of the resistor R101 are all connected to the linear buck module in the BMS management system, and the linear buck module supplies power to the discharge wake-up circuit through VBAT.

2. The BMS management system intelligent wake-up circuit according to claim 1, characterized in that: The collector of the transistor Q24 is also connected to the single chip microcomputer for sending a charging detection signal to the single chip microcomputer.

3. The BMS management system intelligent wake-up circuit according to claim 1, characterized in that: The anode of the diode D9 is also connected to the single chip microcomputer for sending a discharge detection signal to the single chip microcomputer.

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