A kind of hibernation and wake-up control circuit based on middle wing single-chip lithium battery protection board

Abstract

The utility model discloses a kind of hibernation and wake-up control circuit based on Zhong Ying single-chip lithium battery protection board, including SH367309 single-chip microcomputer, SH79F6441P single-chip microcomputer, battery pack warehouse mode control loop, DC-DC power supply loop, charging activation loop, discharge activation loop, battery pack anode, battery pack cathode, charge-discharge anode, discharge cathode and charging cathode.The utility model is characterized in that when battery pack is neither charged nor discharged, timing will be carried out in system interior, when reaching the set time, battery protection board enters hibernation, power consumption reaches μA level, and it is basically close to the state of "zero power consumption";When waking up, it is unnecessary to use wake-up key, and battery protection board is directly woken up by connecting load or charger.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery protection board technology, and in particular to a sleep and wake-up control circuit based on a Zhongying single-chip microcomputer lithium battery protection board. Background Technology

[0002] To enable long-term storage of lithium batteries and reduce power consumption of the battery pack by the battery protection board during long-term storage, lithium battery protection boards often have a sleep function. The conventional sleep function puts the lithium battery protection board's chip into a sleep state to reduce power consumption. Although in sleep mode, the chip usually still performs load or charger connection detection, which also consumes power and drains the battery pack. Entering sleep mode by directly cutting off the power to the lithium battery protection board's chip is more effective, achieving power consumption at the μA level, essentially approaching "zero power consumption." However, this method eliminates the load or charger connection detection function, requiring a button to wake up the battery protection board.

[0003] The utility model application with application number 201920438992.4 discloses a battery management system power hibernation and activation system. Although the system achieves hibernation by power-off, the circuit avoids damage from over-discharge and extends the battery's usage time. However, the circuit only has an automatic activation circuit for charging and does not have an automatic activation circuit for discharging. It needs to be activated by pressing a button when discharging, which is inconvenient to operate. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a sleep and wake-up control circuit based on a Zhongying single-chip microcomputer lithium battery protection board. Its advantages are: when the battery pack is neither charging nor discharging, the system will start a timer. When the set time is reached, the battery protection board enters sleep mode, and the power consumption reaches the μA level, which is close to the "zero power consumption" state; when waking up, there is no need to use a wake-up button. The battery protection board can be woken up directly by connecting a load or charger.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A sleep and wake-up control circuit based on a Zhongying microcontroller-based lithium battery protection board includes an SH367309 microcontroller, an SH79F6441P microcontroller, a battery pack storage and operation mode control circuit, a DC-DC power supply circuit, a charging activation circuit, a discharging activation circuit, a battery pack positive terminal, a battery pack negative terminal, a charging / discharging positive terminal, a discharging negative terminal, and a charging negative terminal. The battery pack positive terminal is connected to the VBAT pin of the SH367309 microcontroller, the charging / discharging positive terminal, and the DC-DC power supply circuit. The battery pack storage and operation mode control circuit is connected to the SHIP and VBAT pins of the SH367309 microcontroller, the P2.3 pin of the SH79F6441P microcontroller, and the battery pack negative terminal. The DC-DC power supply circuit is connected to the VDD pin of the SH79F6441P microcontroller. The charging activation circuit is connected to the charging negative terminal, the discharging negative terminal, the DC-DC power supply circuit, and the battery pack negative terminal via the P0.0 pin. The discharging activation circuit is connected to the discharging negative terminal, the DC-DC power supply circuit, and the battery pack negative terminal. The battery pack negative terminal is connected to the discharging negative terminal via three parallel MOS transistors Q6, Q7, and Q8. The battery pack negative terminal is connected to the VSS pin of the SH367309 microcontroller, the VSS pin of the SH79F6441P microcontroller, and the DC-DC power supply circuit. The discharging negative terminal is connected to the charging negative terminal via MOS transistor Q5. The gate of MOS transistor Q5 is connected to the CHG pin of the SH367309 microcontroller. The gates of the three MOS transistors Q6, Q7, and Q8 are connected to the DSG pin of the SH367309 microcontroller.

[0007] Furthermore, the battery pack transport mode control circuit includes a Q3 transistor, a Q4 transistor, a D3 diode, and a GND network. The emitter of the Q3 transistor is connected to the VBAT pin of the SH367309 microcontroller, the collector of the Q3 transistor is connected to the SHIP pin of the SH367309 microcontroller via resistor R7, the collector of the Q3 transistor is connected to the GND network via resistor R10, and the base of the Q3 transistor is connected via resistor R6. The resistor is connected to the VBAT pin of the SH367309 microcontroller. The base of transistor Q3 is connected to the collector of transistor Q4 through resistor R8. The emitter of transistor Q4 is connected to the GND network. The base of transistor Q4 is connected to the GND network through resistor R14. The base of transistor Q4 is connected to the cathode of diode D3 through resistor R9. The anode of diode D3 is connected to the P2.3 pin of the SH79F6441P microcontroller.

[0008] Furthermore, the DC-DC power supply circuit includes a Q1 transistor, a Q2 transistor, an H6213C chip, a D1 diode, and a D2 diode. The emitter of the Q1 transistor is connected to the positive terminal of the battery pack, and the collector of the Q1 transistor is connected to the VIN pin of the H6213C chip. The base of the Q1 transistor is connected to the anode of the D1 diode and the collector of the Q2 transistor through a resistor R4. The CS pin of the H6213C chip is connected to the VDD pin of the SH79F6441P microcontroller. The base of the Q2 transistor is connected to the cathode of the D2 diode through a resistor R5. The anode of the D2 diode is connected to the P0.0 pin of the SH79F6441P microcontroller. The emitter of the Q2 transistor is connected to the GND network.

[0009] Furthermore, the charging activation circuit is equipped with an O1 optocoupler, pin 1 of the O1 optocoupler is connected to the discharge negative terminal, pin 2 of the O1 optocoupler is connected to the charging negative terminal through resistor R12, and pin 3 of the O1 optocoupler is connected to the GND network.

[0010] Furthermore, the discharge activation circuit is equipped with an O2 optocoupler. Pin 1 of the O2 optocoupler is connected to the negative discharge terminal, pin 2 of the O2 optocoupler is connected to the negative terminal of the battery pack through resistor R19, and pin 3 of the O2 optocoupler is connected to the GND network.

[0011] Furthermore, the negative terminal of the D1 diode is connected to pin 4 of the O1 optocoupler and pin 4 of the O2 optocoupler.

[0012] The beneficial effects of this utility model are: when the battery pack is neither charging nor discharging, the system will start a timer. When the set time is reached, the battery protection board enters sleep mode, and the power consumption reaches the μA level, which extends the storage time of the battery pack. When it is woken up, there is no need to configure a button to activate it. It realizes the direct connection to the load or charger to activate the battery protection board and put it into normal working state. Attached Figure Description

[0013] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, are intended to explain the present invention and do not constitute an undue limitation thereof.

[0014] Figure 1 This is the circuit schematic diagram of this utility model;

[0015] Figure 2 This is a schematic diagram of the control circuit for the battery pack warehousing mode of this utility model;

[0016] Figure 3 This is a schematic diagram of the DC-DC power supply circuit of this utility model;

[0017] Figure 4 This is a schematic diagram of the charging activation circuit of this utility model;

[0018] Figure 5 This is a schematic diagram of the discharge activation circuit of this utility model.

[0019] The annotations in the attached figures are explained as follows:

[0020] U1, SH367309 microcontroller; U3, SH79F6441P microcontroller; A1, Battery pack transport mode control circuit; A2, DC-DC power supply circuit; A3, Charging activation circuit; A4, Discharging activation circuit; B+, Battery pack positive terminal; B-, Battery pack negative terminal; P+ / C+, Charging / discharging positive terminal; P-, Discharging negative terminal; C-, Charging negative terminal. Detailed Implementation

[0021] It should be noted that the directional terms that may be used in the following paragraphs, including but not limited to "up, down, left, right, front, back, inside, outside", are all based on the view orientation shown in the accompanying drawings of the specification. Their purpose is only to help those skilled in the art better understand the technical solution of this utility model, and they should not be regarded as a limitation on the protection scope or technical solution of this utility model.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1-5As shown, a sleep and wake-up control circuit based on a Zhongying microcontroller-based lithium battery protection board includes an SH367309 microcontroller U1, an SH79F6441P microcontroller U3, a battery pack storage and operation mode control circuit A1, a DC-DC power supply circuit A2, a charging activation circuit A3, a discharging activation circuit A4, a battery pack positive terminal B+, a battery pack negative terminal B-, a charging / discharging positive terminal P+ / C+, a discharging negative terminal P-, and a charging negative terminal C-. The battery pack positive terminal B+ is connected to the VBAT pin of the SH367309 microcontroller U1, the charging / discharging positive terminal P+ / C+, and the DC-DC power supply circuit A2. The battery pack storage and operation mode control circuit A1 is connected to the SHIP and VBAT pins of the SH367309 microcontroller U1, the P2.3 pin of the SH79F6441P microcontroller U3, and the battery pack negative terminal B-. The DC-DC power supply circuit A2 is connected to the SH79F6441P... The VDD and P0.0 pins of microcontroller U3 are connected. The charging activation circuit A3 is connected to the charging negative terminal C-, the discharging negative terminal P-, the DC-DC power supply circuit A2, and the battery pack negative terminal B-. The discharging activation circuit A4 is connected to the discharging negative terminal P-, the DC-DC power supply circuit A2, and the battery pack negative terminal B-. The battery pack negative terminal B- is connected to the discharging negative terminal P- through three parallel MOSFETs Q6, Q7, and Q8. The battery pack negative terminal B- is connected to the VSS pin of microcontroller U1 (SH367309), the VSS pin of microcontroller U3 (SH79F6441P), and the DC-DC power supply circuit A2. The discharging negative terminal P- is connected to the charging negative terminal C- through MOSFET Q5. The gate of MOSFET Q5 is connected to the CHG pin of microcontroller U1 (SH367309). The gates of MOSFETs Q6, Q7, and Q8 are connected to the DSG pin of microcontroller U1 (SH367309).

[0025] Furthermore, the battery pack transport mode control circuit A1 is equipped with transistors Q3 and Q4, diode D3, and a GND network. The emitter of transistor Q3 is connected to the VBAT pin of the SH367309 microcontroller U1, the collector of transistor Q3 is connected to the SHIP pin of the SH367309 microcontroller U1 through resistor R7, the collector of transistor Q3 is connected to the GND network through resistor R10, and the base of transistor Q3 is connected to R6. The resistor is connected to the VBAT pin of the SH367309 microcontroller U1. The base of transistor Q3 is connected to the collector of transistor Q4 through resistor R8. The emitter of transistor Q4 is connected to the GND network. The base of transistor Q4 is connected to the GND network through resistor R14. The base of transistor Q4 is connected to the cathode of diode D3 through resistor R9. The anode of diode D3 is connected to the P2.3 pin of the SH79F6441P microcontroller U3.

[0026] Furthermore, the DC-DC power supply circuit A2 is equipped with transistors Q1 and Q2, H6213C chip U2, diode D1, and diode D2. The emitter of transistor Q1 is connected to the positive terminal B+ of the battery pack, the collector of transistor Q1 is connected to the VIN pin of H6213C chip U2, the base of transistor Q1 is connected to the anode of diode D1 and the collector of transistor Q2 through resistor R4, the CS pin of H6213C chip U2 is connected to the VDD pin of microcontroller U3 of SH79F6441P, the base of transistor Q2 is connected to the cathode of diode D2 through resistor R5, the anode of diode D2 is connected to the P0.0 pin of microcontroller U3 of SH79F6441P, and the emitter of transistor Q2 is connected to the GND network.

[0027] Furthermore, the charging activation circuit A3 is equipped with an O1 optocoupler. Pin 1 of the O1 optocoupler is connected to the discharge negative terminal P-, pin 2 of the O1 optocoupler is connected to the charging negative terminal C- through resistor R12, and pin 3 of the O1 optocoupler is connected to the GND network.

[0028] Furthermore, the discharge activation circuit A4 is equipped with an O2 optocoupler. Pin 1 of the O2 optocoupler is connected to the discharge negative terminal P-, pin 2 of the O2 optocoupler is connected to the battery pack negative terminal B- through resistor R19, and pin 3 of the O2 optocoupler is connected to the GND network.

[0029] Furthermore, the negative terminal of diode D1 is connected to pin 4 of optocoupler O1 and pin 4 of optocoupler O2.

[0030] Specifically, when the battery pack is in a static state, i.e., neither charging nor discharging, the internal program of the SH79F6441P microcontroller U3 starts timing. After the timer reaches the set time, pin P0.0 of the SH79F6441P microcontroller U3 changes from an internal pull-up to an internal pull-down. Therefore, Ube of transistor Q2 becomes 0V, and transistor Q2 does not conduct, causing Ie of transistor Q1 to become unconducted. B =0A, so transistor Q1 is not conducting. Therefore, there is no current input to the VIN pin of chip U2, and the CS pin of chip U2 stops outputting 3.3V, thus powering off the SH79F6441P microcontroller U3. After power-off, the P2.3 pin of SH79F6441P microcontroller U3 cannot maintain the pull-up voltage, so there is no output current, causing the I of transistor Q4 to... B =0A, so transistor Q4 is not conducting, therefore transistor Q3 I B =0A, so transistor Q3 is not conducting. Therefore, the SHIP pin of SH367309 microcontroller U1 is pulled down to ground, and then SH367309 microcontroller U1 enters sleep mode, shutting down all functions. At this time, the entire lithium battery protection board enters sleep mode, and the power consumption reaches the μA level.

[0031] When the lithium battery protection board needs to be activated, simply connect a load or charger. When the load is connected, current flows from the positive terminal B+ of the battery pack, through the external load circuit, and then back from the negative terminal P-. It then passes through pins 1 and 2 of optocoupler O2 and returns to the negative terminal B- of the battery pack, activating optocoupler O2. Pins 4 and 3 of optocoupler O2 then conduct, connecting the K2 network to the GND network. Consequently, the base of transistor Q1 flows through resistor R4 and diode D1 to the K2 network, then to the GND network, making transistor Q1 conduct. The current output from the positive terminal B+ of the battery pack then passes through transistor Q1 and is input to the VIN pin of chip U2. Therefore, chip U2 starts working, and its CS pin outputs 3.3V, powering on the SH79F6441P microcontroller U3 and putting it into operation. Similarly, when the charger is connected, the current enters from the positive terminal P+ / C+ of the charging / discharging circuit, enters the positive terminal B+ of the battery pack, and then exits from the negative terminal B- of the battery pack. It then passes through pins 1 and 2 of the optocoupler O1 and returns to the negative terminal C- of the charging circuit, activating the optocoupler O1. Then, pins 4 and 3 of the optocoupler O1 conduct, so the K2 network is connected to the GND network. Therefore, the base of transistor Q1 passes through resistor R4 and diode D1 to the K2 network, and then to the GND network, making transistor Q1 conduct. The current output from the positive terminal B+ of the battery pack then passes through transistor Q1 and is input to the VIN pin of the U2 chip. Therefore, the U2 chip starts working, and its CS pin outputs 3.3V, powering on the SH79F6441P microcontroller U3 and putting it into operation. After the SH79F6441P microcontroller U3 enters working mode, its P2.3 pin outputs a high level. This high level passes through diode D3 and resistor R9 to the base (B) of transistor Q4, and then through the emitter (E) of transistor Q4 to the GND network, thus turning on transistor Q4. Consequently, the VBAT power supply passes through the emitter (E) of transistor Q3 to the base (B), and then through resistor R8 and transistor Q4 to the GND network, turning on transistor Q3. This pulls up the SHIP pin of the SH367309 microcontroller U1 to the VBAT power supply. At this point, the SH367309 microcontroller U1 exits the storage mode, enables all functions, and enters working mode. At this time, the entire lithium battery protection board is activated, all chips are powered on, and they enter normal operating mode.

[0032] The above figures and descriptions represent only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A sleep and wake-up control circuit based on a Zhongying single-chip microcomputer lithium battery protection board, comprising an SH367309 single-chip microcomputer (U1), an SH79F6441P single-chip microcomputer (U3), a battery pack storage and operation mode control circuit (A1), a DC-DC power supply circuit (A2), a charging activation circuit (A3), a discharging activation circuit (A4), a battery pack positive terminal (B+), a battery pack negative terminal (B-), a charging / discharging positive terminal (P+ / C+), a discharging negative terminal (P-), and a charging negative terminal (C-), characterized in that: The positive terminal (B+) of the battery pack is connected to the VBAT pin, the positive terminal (P+ / C+) of the charge / discharge circuit, and the DC-DC power supply circuit (A2) of the SH367309 microcontroller (U1). The battery pack storage mode control circuit (A1) is connected to the SHIP and VBAT pins of the SH367309 microcontroller (U1), the P2.3 pin of the SH79F6441P microcontroller (U3), and the negative terminal (B-) of the battery pack. The DC-DC power supply circuit (A2) is connected to the VDD and P0.0 pins of the SH79F6441P microcontroller (U3). The charging activation circuit (A3) is connected to the negative terminal (C-) of the charge circuit, the negative terminal (P-) of the discharge circuit, the DC-DC power supply circuit (A2), and the negative terminal (B-) of the battery pack. The discharging activation circuit (A3) is connected to the negative terminal (C-) of the charge circuit, the negative terminal (P-) of the discharge circuit, and the negative terminal (B-) of the discharge circuit. A4) is connected to the discharge negative terminal (P-), the DC-DC power supply circuit (A2), and the battery pack negative terminal (B-). The battery pack negative terminal (B-) is connected to the discharge negative terminal (P-) through three parallel MOS transistors Q6, Q7, and Q8. The battery pack negative terminal (B-) is connected to the VSS pin of the SH367309 microcontroller (U1), the VSS pin of the SH79F6441P microcontroller (U3), and the DC-DC power supply circuit (A2). The discharge negative terminal (P-) is connected to the charging negative terminal (C-) through MOS transistor Q5. The gate of MOS transistor Q5 is connected to the CHG pin of the SH367309 microcontroller (U1). The gates of the three MOS transistors Q6, Q7, and Q8 are connected to the DSG pin of the SH367309 microcontroller (U1).

2. The sleep and wake-up control circuit based on the Zhongying single-chip microcomputer lithium battery protection board according to claim 1, characterized in that: The battery pack transport mode control circuit (A1) is equipped with a Q3 transistor, a Q4 transistor, a D3 diode, and a GND network. The emitter of the Q3 transistor is connected to the VBAT pin of the SH367309 microcontroller (U1), the collector of the Q3 transistor is connected to the SHIP pin of the SH367309 microcontroller (U1) through a resistor R7, the collector of the Q3 transistor is connected to the GND network through a resistor R10, and the base of the Q3 transistor is connected to a resistor R6. The base of transistor Q3 is connected to the collector of transistor Q4 via resistor R8, the emitter of transistor Q4 is connected to the GND network, the base of transistor Q4 is connected to the GND network via resistor R14, the base of transistor Q4 is connected to the cathode of diode D3 via resistor R9, and the anode of diode D3 is connected to the P2.3 pin of microcontroller SH79F6441P (U3).

3. The sleep and wake-up control circuit based on the Zhongying single-chip microcomputer lithium battery protection board according to claim 2, characterized in that: The DC-DC power supply circuit (A2) is equipped with transistors Q1 and Q2, an H6213C chip (U2), diodes D1 and D2. The emitter of transistor Q1 is connected to the positive terminal (B+) of the battery pack, and the collector of transistor Q1 is connected to the VIN pin of the H6213C chip (U2). The base of transistor Q1 is connected to the anode of diode D1 and the collector of transistor Q2 through resistor R4. The CS pin of the H6213C chip (U2) is connected to the VDD pin of the SH79F6441P microcontroller (U3). The base of transistor Q2 is connected to the cathode of diode D2 through resistor R5. The anode of diode D2 is connected to the P0.0 pin of the SH79F6441P microcontroller (U3). The emitter of transistor Q2 is connected to the GND network.

4. The sleep and wake-up control circuit based on the Zhongying single-chip microcomputer lithium battery protection board according to claim 3, characterized in that: The charging activation circuit (A3) is equipped with an O1 optocoupler. Pin 1 of the O1 optocoupler is connected to the discharge negative terminal (P-), pin 2 of the O1 optocoupler is connected to the charging negative terminal (C-) through resistor R12, and pin 3 of the O1 optocoupler is connected to the GND network.

5. The sleep and wake-up control circuit based on the Zhongying single-chip microcomputer lithium battery protection board according to claim 4, characterized in that: The discharge activation circuit (A4) is equipped with an O2 optocoupler. Pin 1 of the O2 optocoupler is connected to the discharge negative terminal (P-), pin 2 of the O2 optocoupler is connected to the battery pack negative terminal (B-) through resistor R19, and pin 3 of the O2 optocoupler is connected to the GND network.

6. The sleep and wake-up control circuit based on the Zhongying single-chip microcomputer lithium battery protection board according to claim 5, characterized in that: The negative terminal of diode D1 is connected to pin 4 of optocoupler O1 and pin 4 of optocoupler O2.

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