Driving control circuit and battery protection system

Abstract

The invention provides a driving control circuit and a battery protection system, the driving control circuit comprises a turn-on driving module and a turn-off driving module, the turn-on driving module receives an original driving signal, and when the original driving signal is at a high level, a multi-tube parallel structure is controlled to be quickly turned on by amplifying a driving current; the turn-off driving module receives the original driving signal and controls the multi-tube parallel structure to be turned off quickly by amplifying the bleeder current when the original driving signal is at a low level. According to the driving control circuit and the battery protection system provided by the invention, the problems of low switching speed and even incapability of completely switching in the existing driving scheme are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuits, and in particular to a drive control circuit and a battery protection system. Background Art

[0002] Lithium batteries are increasingly being used as energy supply components in various electrical equipment to replace lead-acid batteries due to their advantages such as light weight, long cycle life, large discharge current, energy saving and environmental protection. In the early days, lithium batteries were mostly used in low-power electronic devices such as headphones, watches, and mobile phones; with the breakthrough of lithium battery raw material technology, the improvement of production processes and the requirements of the national "dual carbon" goals, lithium batteries are increasingly being used in two- and three-wheeled electric vehicles, electric vehicles, base station energy storage and other scenarios.

[0003] Lithium batteries need to ensure that their operating temperature, battery voltage, and charge and discharge current are within a certain range in order to work safely and reliably for a long time, so they need to be equipped with corresponding protection boards to ensure their safe operation. In high-power equipment, the operating current of lithium batteries ranges from tens to hundreds of amperes. When designing and selecting protection solutions, MOS tubes with low on-resistance Ron are usually selected and multiple MOS tubes need to work in parallel to ensure the temperature rise and overcurrent capacity of the MOS tubes, while reducing losses.

[0004] like Figure 1 As shown in the figure, the existing protection scheme is to use the protection IC to directly drive the MOS tube, Q1 is the discharge tube, Q2 is the charging tube, DO is the driving signal of the discharge tube, and CO is the driving signal of the charging tube; in order to reduce power consumption, the protection IC has a relatively small MOS tube driving current. In high-power applications, MOS tubes with low Ron are usually used, and the lower the Ron, the greater the input capacitance Ciss, and the greater the required driving capacity; more importantly, many MOS tubes are usually used in parallel in high-power applications, and Ciss will increase exponentially, and the required driving capacity will also increase exponentially. The existing driving method cannot meet the needs of fast switching of MOS tubes.

[0005] Since the driving principle of the discharge tube Q1 and the charging tube Q2 is the same, only the discharge tube Q1 is taken as an example for analysis. Figure 2 for Figure 1 The protection scheme shown drives the discharge tube Q1 to turn on and off when the waveform is as follows: Figure 2 As shown:

[0006] The time period t0-t3 is the driving voltage V of the discharge tube Q1 when the on-time is longer and the switching frequency is lower. GS At t0, the driving signal DO is at a high level to control the discharge tube Q1 to turn on, and the driving voltage V GS The rising speed is slow, and it is fully turned on at time t1. At this time, the driving voltage V GSAt t2, the drive signal DO is at a low level to control the discharge tube Q1 to turn off, and the drive voltage V GS The drop speed is slow, and it is completely turned off at time t3. At this time, the driving voltage V GS is 0.

[0007] The time period t3-t5 is the driving voltage V of the discharge tube Q1 when the on-time is short and the switching frequency is high. GS At t3, the driving signal DO is at a high level to control the discharge tube Q1 to turn on, and the driving voltage V GS The rising speed is slow. When the driving signal DO is at a low level at time t4, it has not yet reached V+, and the discharge tube Q1 has not yet been fully turned on. At time t4, the driving signal DO is at a low level to control the discharge tube Q1 to turn off. The driving voltage V GS The falling speed is slow, and when the driving signal DO is at a high level at time t5, it has not yet reached 0, and the discharge tube Q1 has not been completely turned off.

[0008] From the above analysis, it can be seen that due to the insufficient driving capability of the protection IC, it takes a long time to fully turn on or off the discharge tube Q1 and the charging tube Q2 in parallel. When the switching frequency is high, it will not be fully turned on or off. Moreover, when the protection IC fails and other problems cause the driving signals DO and CO to float, the level state is unstable, and affected by the spatial interference, the discharge tube Q1 and the charging tube Q2 have the risk of mis-turning on. Summary of the invention

[0009] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a drive control circuit and a battery protection system for solving the problem of slow switching speed or even inability to switch completely in the existing drive scheme.

[0010] To achieve the above-mentioned purpose and other related purposes, the present invention provides a driving control circuit suitable for driving control of a multi-tube parallel structure, wherein the driving control circuit includes an on-driving module and an off-driving module, wherein:

[0011] The opening driving module receives the original driving signal, and when the original driving signal is at a high level, controls the multi-tube parallel structure to be quickly opened by amplifying the driving current;

[0012] The shutdown driving module receives the original driving signal, and when the original driving signal is at a low level, controls the multi-tube parallel structure to shut down quickly by amplifying the discharge current.

[0013] Optionally, the opening driving module includes a first triode, a second triode, a first resistor, a second resistor, a third resistor and a fourth resistor;

[0014] The base of the first transistor is connected to the original driving signal via the first resistor, the collector is connected to the power supply voltage, and the emitter is connected to the base of the second transistor; the collector of the second transistor is connected to the power supply voltage, and the emitter is connected to the control electrode of the multi-tube parallel structure; the second resistor, the third resistor and the fourth resistor are connected in series between the power supply voltage and the reference ground; wherein the base of the first transistor is also connected to the connection node of the second resistor and the third resistor, and the base of the second transistor is also connected to the connection node of the third resistor and the fourth resistor.

[0015] Optionally, the shutdown driving module includes a third triode, a first diode and a fifth resistor;

[0016] The base of the third transistor is connected to the anode of the first diode, the collector is connected to the reference ground, and the emitter is connected to the control electrode of the multi-tube parallel structure; the anode of the first diode is connected to the base of the second transistor, and the cathode is connected to the original driving signal via the fifth resistor.

[0017] Optionally, the drive control circuit also includes a charge and discharge regulation module, wherein the charge and discharge regulation module includes a sixth resistor, a first end of which is connected to the emitters of the second transistor and the third transistor, and a second end of which is connected to the control electrode of the multi-tube parallel structure.

[0018] Optionally, the charge and discharge regulation module further includes a first voltage regulator tube, a cathode of which is connected to the second end of the sixth resistor, and an anode of which is connected to a reference ground.

[0019] The present invention also provides a battery protection system, which includes a discharge tube, a charging tube, a protection unit, a discharge drive control unit and a charging drive control unit, wherein:

[0020] The discharge tube and the charging tube are connected in series to the negative electrode of the battery, and the discharge tube and the charging tube are implemented by a multi-tube parallel structure;

[0021] The protection unit is used to collect the working parameters of the battery, and generate a discharge original drive signal and a charge original drive signal according to whether the working parameters are abnormal;

[0022] The discharge drive control unit is connected between the protection unit and the discharge tube, and is used to control the discharge tube to be turned on or off according to the discharge original drive signal;

[0023] The charging drive control unit is connected between the protection unit and the charging tube, and is used to control the charging tube to be turned on or off according to the charging original drive signal;

[0024] Wherein, the discharge drive control unit and the charge drive control unit are implemented by the drive control circuit according to any one of claims 1-5.

[0025] Optionally, the protection unit is used to collect the operating temperature, battery voltage, charging current and discharging current of the battery and perform abnormality judgment to generate the discharge original drive signal and the charge original drive signal according to the judgment result.

[0026] Optionally, the battery protection system further includes a power supply unit for converting the battery voltage into a power supply voltage to supply power to the discharge drive control unit and the charge drive control unit.

[0027] Optionally, the power supply unit includes a seventh resistor, an eighth resistor, a ninth resistor, a second diode and a second voltage regulator tube;

[0028] The anode of the second diode is connected to the battery voltage, and the cathode is connected to the first end of the seventh resistor; the second end of the seventh resistor is connected to the first ends of the eighth resistor and the ninth resistor; the second end of the eighth resistor is connected to the anode of the second voltage regulator tube and the reference ground; the second end of the ninth resistor is connected to the cathode of the second voltage regulator tube and generates the supply voltage.

[0029] Optionally, the battery of the battery protection system includes a lithium battery.

[0030] As described above, the drive control circuit and the battery protection system of the present invention can realize the rapid opening and closing of the multi-tube parallel structure through the design of the opening drive module and the closing drive module, so that the multi-tube parallel structure can still be fully opened and closed when the switching frequency is high; in addition, it can also prevent the multi-tube parallel structure from being mis-opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Shown is a structural schematic diagram of an existing lithium battery protection solution.

[0032] Figure 2 Display as Figure 1 Waveform diagram when the driving discharge tube is turned on and off.

[0033] Figure 3 Shown is a schematic structural diagram of the drive control circuit of the present invention.

[0034] Figure 4 Shown is a schematic structural diagram of the battery protection system of the present invention.

[0035] Figure 5 Display as Figure 4 Waveform diagram when the driving discharge tube is turned on and off.

[0036] Component number description

[0037] 100 drive control circuit

[0038] 110 Enable the driver module

[0039] 120 Turn off the drive module

[0040] 130 Charge and discharge regulation module

[0041] 100a Discharge drive control unit

[0042] 100b Charging Drive Control Unit

[0043] 200 protection units

[0044] 300 Power Supply Unit DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0046] See also Figures 3 to 5 It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the form, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0047] Embodiment 1

[0048] like Figure 3 As shown, this embodiment provides a driving control circuit 100 suitable for driving control of a multi-tube parallel structure; it includes an opening driving module 110 and a closing driving module 120, and further includes a charge and discharge regulation module 130.

[0049] Among them, the multi-tube parallel structure refers to a structure formed by at least two power tubes in parallel, such as a structure formed by 8-12 power tubes in parallel; taking three NMOS tubes in parallel as an example, the gates of the three NMOS tubes are connected to each other to form a control electrode of the multi-tube parallel structure, the sources of the three NMOS tubes are connected to each other to form a first connection electrode of the multi-tube parallel structure, and the drains of the three NMOS tubes are connected to each other to form a second connection electrode of the multi-tube parallel structure.

[0050] The opening driving module 110 receives the original driving signal, and when the original driving signal is at a high level, controls the multi-tube parallel structure to be quickly opened by amplifying the driving current.

[0051] As an example, the opening driving module 110 includes a first transistor Q1, a second transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4; the base of the first transistor Q1 is connected to the original driving signal via the first resistor R1, the collector is connected to the power supply voltage VDD, and the emitter is connected to the base of the second transistor Q2; the collector of the second transistor Q2 is connected to the power supply voltage VDD, and the emitter is connected to the control electrode of the multi-tube parallel structure; the second resistor R2, the third resistor R3 and the fourth resistor R4 are connected in series between the power supply voltage VDD and the reference ground; wherein, the base of the first transistor Q1 is also connected to the connection node of the second resistor R2 and the third resistor R3, and the base of the second transistor Q2 is also connected to the connection node of the third resistor R3 and the fourth resistor R4.

[0052] Among them, the first resistor R1 plays the role of voltage bearing and current limiting; the second resistor R2, the third resistor R3 and the fourth resistor R4 form a bias circuit to provide a base bias voltage for the first transistor Q1; the first transistor Q1 and the second transistor Q2 form a two-stage amplification circuit to provide sufficient driving current for the subsequent multi-tube parallel structure.

[0053] When the original driving signal is at a high level, the connection node B1 of the first resistor R1, the second resistor R2, the third resistor R3 and the first transistor Q1 will be set to a high level, and the first transistor Q1 will be turned on; the tube voltage drop of the first transistor Q1 after it is turned on is very small, so the base voltage of the second transistor Q2 is at a high level, and the second transistor Q2 is turned on; in this way, the two-stage amplifier circuit composed of the first transistor Q1 and the second transistor Q2 can provide sufficient driving current to drive the subsequent multi-tube parallel structure to turn on quickly.

[0054] When the original driving signal is at a low level, the connection node B1 among the first resistor R1, the second resistor R2, the third resistor R3 and the first transistor Q1 will be set to a low level, and the first transistor Q1 and the second transistor Q2 will be turned off, and no longer provide driving for the subsequent multi-tube parallel structure.

[0055] In addition, when the original driving signal is in a suspended state, due to the existence of the third resistor R3 and the fourth resistor R4, the base voltages of the first transistor Q1 and the second transistor Q2 are pulled down, thereby preventing mis-conduction.

[0056] The shutdown driving module 120 receives the original driving signal, and when the original driving signal is at a low level, controls the multi-tube parallel structure to shut down quickly by amplifying the discharge current.

[0057] As an example, the shutdown drive module 120 includes a third transistor Q3, a first diode D1 and a fifth resistor R5; the base of the third transistor Q3 is connected to the anode of the first diode D1, the collector is connected to the reference ground, and the emitter is connected to the control electrode of the multi-tube parallel structure; the anode of the first diode D1 is connected to the base of the second transistor Q2, and the cathode is connected to the original drive signal through the fifth resistor R5.

[0058] The fifth resistor R5 is used as a turn-off discharge current limiting resistor, the first diode D1 plays an anti-reverse role, and the third transistor Q3 plays an amplifying role in the control electrode charge discharge of the subsequent multi-tube parallel structure.

[0059] When the original driving signal is at a high level, due to the existence of the first diode D1 , the high level has no effect on turning off the driving module 120 .

[0060] When the original driving signal is at a low level, the first transistor Q1 and the second transistor Q2 will be turned off and will no longer provide drive for the subsequent multi-tube parallel structure; at this time, the voltage of the control electrode of the multi-tube parallel structure is at an instantaneous high level, but because the original driving signal is at a low level, the base voltage of the third transistor Q3 is at a low level, so the third transistor Q3 is turned on, thereby accelerating the charge discharge of the control electrode of the subsequent multi-tube parallel structure and controlling the subsequent multi-tube parallel structure to be quickly turned off.

[0061] The charge and discharge regulation module 130 includes a sixth resistor R6, a first end of which is connected to the emitters of the second transistor Q2 and the third transistor Q3, and a second end of which is connected to the control electrode of the multi-tube parallel structure; wherein the sixth resistor R6 plays a role in limiting current and regulating the charge and discharge speed during the opening and closing process of the multi-tube parallel structure.

[0062] Furthermore, the charge and discharge regulation module 130 also includes a first voltage regulator tube D2, the cathode of which is connected to the second end of the sixth resistor R6, and the anode of which is connected to the reference ground; wherein the first voltage regulator tube D2 plays a role in stabilizing the voltage of the connection node B2 to prevent the control electrode and the first connection electrode (such as the G electrode and the S electrode) of the multi-tube parallel structure from being damaged by overvoltage.

[0063] Embodiment 2

[0064] like Figure 4 As shown, this embodiment provides a battery protection system, including a discharge tube DQ, a charging tube CQ, a discharge drive control unit 100a, a charge drive control unit 100b and a protection unit 200, and further includes a power supply unit 300.

[0065] The batteries involved in the battery protection system include lithium batteries. Of course, other types of batteries are also feasible, which has no substantial impact on this embodiment.

[0066] The discharge tube DQ and the charging tube CQ are connected in series to the negative electrode of the battery, and the discharge tube DQ and the charging tube CQ are implemented by a multi-tube parallel structure.

[0067] As an example, the discharge tube DQ and the charging tube CQ are both structures formed by connecting multiple NMOS tubes in parallel, such as the discharge tube DQ and the charging tube CQ are both structures formed by connecting 12 NMOS tubes in parallel. At this time, the control electrode of the discharge tube DQ is connected to the discharge drive control unit 100a, the first connection electrode is connected to the negative electrode of the battery, and the second connection electrode is connected to the first connection electrode of the charging tube CQ; the control electrode of the charging tube CQ is connected to the charging drive control unit 100b, and the second connection electrode is used as the negative electrode; and the positive electrode of the battery is used as the positive electrode.

[0068] The protection unit 200 is used to collect the working parameters of the battery, and generate a discharge original driving signal DO and a charge original driving signal CO according to whether the working parameters are abnormal.

[0069] Specifically, the protection unit 200 is used to collect the operating temperature, battery voltage, charging current and discharging current of the battery and perform abnormality judgment, so as to generate the discharge original driving signal DO and the charge original driving signal CO according to the judgment result. For example:

[0070] For the discharge process and the charging process: the protection unit 200 collects the operating temperature of the battery and compares the collected operating temperature with the set temperature range; if the collected operating temperature does not exceed the set temperature range, it is judged that the temperature is normal, and a high-level discharge original drive signal DO and a high-level charge original drive signal CO are generated; if the collected operating temperature exceeds the set temperature range, it is judged that the temperature is abnormal, and a low-level discharge original drive signal DO and a low-level charge original drive signal CO are generated.

[0071] For the charging process:

[0072] The protection unit 200 collects the battery voltage of the battery and compares the collected battery voltage with the set high voltage; if the collected battery voltage does not reach the set high voltage, it is judged that the voltage is normal, and a high-level discharge original drive signal DO and a high-level charge original drive signal CO are generated; if the collected battery voltage reaches the set high voltage, it is judged that the voltage is abnormal, and a high-level discharge original drive signal DO and a low-level charge original drive signal CO are generated.

[0073] The protection unit 200 collects the charging current of the battery and compares the collected charging current with the set charging current range; if the collected charging current does not exceed the set charging current range, it is judged that the current is normal, and a high-level discharge original drive signal DO and a high-level charging original drive signal CO are generated; if the collected charging current exceeds the set charging current range, it is judged that the current is abnormal, and a high-level discharge original drive signal DO and a low-level charging original drive signal CO are generated.

[0074] For the discharge process:

[0075] The protection unit 200 collects the battery voltage of the battery and compares the collected battery voltage with the set low voltage; if the collected battery voltage does not reach the set low voltage, it is judged that the voltage is normal, and a high-level discharge original drive signal DO and a high-level charge original drive signal CO are generated; if the collected battery voltage reaches the set low voltage, it is judged that the voltage is abnormal, and a low-level discharge original drive signal DO and a high-level charge original drive signal CO are generated.

[0076] The protection unit 200 collects the discharge current of the battery and compares the collected discharge current with the set discharge current range; if the collected discharge current does not exceed the set discharge current range, it is judged that the current is normal, and a high-level discharge original drive signal DO and a high-level charging original drive signal CO are generated; if the collected discharge current exceeds the set discharge current range, it is judged that the current is abnormal, and a low-level discharge original drive signal DO and a high-level charging original drive signal CO are generated.

[0077] The discharge drive control unit 100a is connected between the protection unit 200 and the discharge tube DQ, and is used to control the discharge tube DQ to be turned on or off according to the discharge original drive signal DO. The discharge drive control unit 100a is implemented by the drive control circuit 100 as described in the first embodiment. The relevant contents can be found in the first embodiment, and will not be repeated here.

[0078] The charging drive control unit 100b is connected between the protection unit 200 and the charging tube CQ, and is used to control the charging tube CQ to turn on or off according to the charging original drive signal CO. The charging drive control unit 100b is implemented by the drive control circuit 100 as described in the first embodiment. The relevant contents can be found in the first embodiment, and will not be repeated here.

[0079] The power supply unit 300 is used to convert the battery voltage into a power supply voltage VDD to supply power to the discharge drive control unit 100a and the charge drive control unit 100b.

[0080] As an example, the power supply unit 300 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second diode D3 and a second voltage regulator D4; the anode of the second diode D3 is connected to the battery voltage, and the cathode is connected to the first end of the seventh resistor R7; the second end of the seventh resistor R7 is connected to the first ends of the eighth resistor R8 and the ninth resistor R9; the second end of the eighth resistor R8 is connected to the anode of the second voltage regulator D4 and the reference ground; the second end of the ninth resistor R9 is connected to the cathode of the second voltage regulator D4 and generates a supply voltage VDD.

[0081] Among them, the second diode D3 obtains the battery voltage from the positive electrode of the battery and plays a role in preventing the power backflow caused by abnormal load of the subsequent stage; the seventh resistor R7 and the eighth resistor R8 perform resistance voltage division to provide a suitable power supply voltage VDD for the subsequent stage; the ninth resistor R9 is used as a current limiting resistor to prevent the subsequent stage load from short-circuiting and failing, resulting in excessive power consumption; the second voltage regulator D4 plays a voltage stabilizing role and provides a stable power supply voltage VDD for the subsequent stage.

[0082] The driving principle of the discharge tube DQ is the same as that of the charging tube CQ. The following takes the driving of the discharge tube DQ as an example to analyze and explain the performance of the driving control circuit of the present application. Figure 5 1 is a waveform diagram when the discharge driving control unit 100a drives the discharge tube DQ to be turned on and off. Figure 5 As shown:

[0083] The time period t0-t3 is the driving voltage V of the discharge tube DQ when the on-time is long and the switching frequency is low. GS At t0, the original discharge drive signal DO is at a high level to control the discharge tube DQ to turn on, and the drive voltage V GS Rapidly rises, and is fully turned on at time t1. At this time, the driving voltage V GS At t2, the discharge original driving signal DO is at a low level to control the discharge tube DQ to be turned off, and the driving voltage V GS It drops rapidly and is completely turned off at time t3. At this time, the driving voltage V GS is 0.

[0084] The time period t4-t7 is the driving voltage V of the discharge tube DQ when the on-time is short and the switching frequency is high. GS At t4, the original discharge drive signal DO is at a high level to control the discharge tube DQ to turn on, and the drive voltage V GS Rapidly rises, and is fully turned on at time t5. At this time, the driving voltage V GS At t6, the discharge original driving signal DO is at a low level to control the discharge tube DQ to be turned off, and the driving voltage V GS It drops rapidly and is completely turned off at time t7. At this time, the driving voltage VGS is 0.

[0085] From the above analysis, it can be seen that when the driving control circuit 100 of the present application drives and controls the discharge tube DQ and the charging tube CQ, the discharge tube DQ and the charging tube CQ can be quickly turned on and off, and even when the switching frequency is high, the discharge tube DQ and the charging tube CQ can be completely turned on and off; moreover, there is no risk of mis-turning on the discharge tube DQ and the charging tube CQ.

[0086] In summary, the drive control circuit and battery protection system of the present invention can realize the rapid opening and closing of the multi-tube parallel structure through the design of the opening drive module and the closing drive module, so that the multi-tube parallel structure can still be fully opened and closed when the switching frequency is high; in addition, the multi-tube parallel structure can be prevented from being mis-opened. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0087] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A drive control circuit, suitable for driving control of a multi-tube parallel structure, characterized in that: The drive control circuit includes an on-drive module and an off-drive module, wherein: The opening driving module receives the original driving signal, and when the original driving signal is at a high level, controls the multi-tube parallel structure to be quickly opened by amplifying the driving current; The shutdown driving module receives the original driving signal, and when the original driving signal is at a low level, controls the multi-tube parallel structure to shut down quickly by amplifying the discharge current.

2. The drive control circuit according to claim 1, characterized in that: The opening driving module includes a first triode, a second triode, a first resistor, a second resistor, a third resistor and a fourth resistor; The base of the first transistor is connected to the original driving signal via the first resistor, the collector is connected to the power supply voltage, and the emitter is connected to the base of the second transistor; the collector of the second transistor is connected to the power supply voltage, and the emitter is connected to the control electrode of the multi-tube parallel structure; the second resistor, the third resistor and the fourth resistor are connected in series between the power supply voltage and the reference ground; wherein the base of the first transistor is also connected to the connection node of the second resistor and the third resistor, and the base of the second transistor is also connected to the connection node of the third resistor and the fourth resistor.

3. The drive control circuit according to claim 2, characterized in that: The shutdown driving module includes a third triode, a first diode and a fifth resistor; The base of the third transistor is connected to the anode of the first diode, the collector is connected to the reference ground, and the emitter is connected to the control electrode of the multi-tube parallel structure; the anode of the first diode is connected to the base of the second transistor, and the cathode is connected to the original driving signal via the fifth resistor.

4. The drive control circuit according to claim 3, characterized in that: The drive control circuit also includes a charge and discharge regulation module, wherein the charge and discharge regulation module includes a sixth resistor, a first end of which is connected to the emitters of the second transistor and the third transistor, and a second end of which is connected to the control electrode of the multi-tube parallel structure.

5. The drive control circuit according to claim 4, characterized in that: The charge and discharge regulation module further includes a first voltage regulator tube, a cathode of which is connected to the second end of the sixth resistor, and an anode of which is connected to a reference ground.

6. A battery protection system, characterized in that: The battery protection system includes a discharge tube, a charging tube, a protection unit, a discharge drive control unit and a charging drive control unit, wherein: The discharge tube and the charging tube are connected in series to the negative electrode of the battery, and the discharge tube and the charging tube are implemented by a multi-tube parallel structure; The protection unit is used to collect the working parameters of the battery, and generate a discharge original drive signal and a charge original drive signal according to whether the working parameters are abnormal; The discharge drive control unit is connected between the protection unit and the discharge tube, and is used to control the discharge tube to be turned on or off according to the discharge original drive signal; The charging drive control unit is connected between the protection unit and the charging tube, and is used to control the charging tube to be turned on or off according to the charging original drive signal; Wherein, the discharge drive control unit and the charge drive control unit are implemented by the drive control circuit according to any one of claims 1-5.

7. The battery protection system according to claim 6, characterized in that: The protection unit is used to collect the operating temperature, battery voltage, charging current and discharging current of the battery and perform abnormality judgment, so as to generate the discharge original driving signal and the charge original driving signal according to the judgment result.

8. The battery protection system according to claim 6, characterized in that: The battery protection system further includes a power supply unit for converting the battery voltage into a power supply voltage to supply power to the discharge drive control unit and the charge drive control unit.

9. The battery protection system according to claim 8, characterized in that: The power supply unit includes a seventh resistor, an eighth resistor, a ninth resistor, a second diode and a second voltage regulator tube; The anode of the second diode is connected to the battery voltage, and the cathode is connected to the first end of the seventh resistor; the second end of the seventh resistor is connected to the first ends of the eighth resistor and the ninth resistor; the second end of the eighth resistor is connected to the anode of the second voltage regulator tube and the reference ground; the second end of the ninth resistor is connected to the cathode of the second voltage regulator tube and generates the supply voltage.

10. The battery protection system according to any one of claims 6 to 9, characterized in that: The battery of the battery protection system includes a lithium battery.

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