Driving control circuit and control system of lithium battery

Abstract

The embodiment of the utility model discloses a driving control circuit and a control system of a lithium battery. The driving control circuit of the lithium battery comprises a control circuit, a display circuit and a driving circuit, the control circuit is connected with the driving circuit, the driving circuit is connected with a positive terminal and a negative terminal of the lithium battery, the control circuit is used for generating short-circuit protection signals and transmitting the short-circuit protection signals to the driving circuit, and the driving circuit is used for controlling short circuit of the lithium battery according to the short-circuit protection signals; the control circuit is connected with the display circuit which is used for displaying the short-circuit times of the lithium battery. The utility model meets the short-circuit condition of the lithium battery and has the function of monitoring the short-circuit times of the lithium battery.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of power electronics, and in particular, to a driving control circuit and a control system for a lithium battery. Background Art

[0002] For a long time, short-circuit protection testing has been an essential test content for lithium battery products. According to the detailed rules of the safety technical specifications for lithium batteries and battery packs used in portable electronic products, the following short-circuit conditions need to be met: short-circuit the positive and negative terminals of the battery pack or the output terminals in the protection circuit; let it stand for 1 minute after the protection device operates; when short-circuiting, the total resistance of the external circuit is 80 mΩ ± 20 mΩ; the number of short-circuit cycles is 500 times. Currently, the problem with the existing driving control circuits for lithium batteries is that they cannot meet the above short-circuit conditions and do not have the function of monitoring the number of short circuits of the lithium battery. Summary of the Utility Model

[0003] The present utility model provides a driving control circuit and a control system for a lithium battery, which can meet the short-circuit conditions of the lithium battery and have the function of monitoring the number of short circuits of the lithium battery.

[0004] According to one aspect of the present utility model, a driving control circuit for a lithium battery is provided. The driving control circuit for the lithium battery includes: a control circuit, a display circuit, and a driving circuit;

[0005] The control circuit is connected to the driving circuit, the driving circuit is connected to the positive terminal and the negative terminal of the lithium battery, the control circuit is used to generate a short-circuit protection signal and transmit it to the driving circuit, and the driving circuit is used to control the short circuit of the lithium battery according to the short-circuit protection signal;

[0006] The control circuit is connected to the display circuit, and the display circuit is used to display the number of short circuits of the lithium battery.

[0007] Optionally, the control circuit includes: a single-chip microcomputer, a twelfth capacitor, a seventeenth capacitor, a second crystal oscillator, an eighteenth capacitor, a nineteenth capacitor, and a third crystal oscillator;

[0008] The first end of the twelfth capacitor is connected to the first end of the seventeenth capacitor and then grounded. The second end of the twelfth capacitor is connected to the first end of the second crystal oscillator and the third terminal of the single-chip microcomputer. The second end of the seventeenth capacitor is connected to the second end of the second crystal oscillator and the fourth terminal of the single-chip microcomputer;

[0009] The first end of the eighteenth capacitor is connected to the first end of the nineteenth capacitor and then grounded. The second end of the eighteenth capacitor is connected to the first end of the third crystal oscillator and the fifth terminal of the single-chip microcomputer. The second end of the nineteenth capacitor is connected to the second end of the third crystal oscillator and the sixth terminal of the single-chip microcomputer.

[0010] Optionally, the control circuit further includes: a nineteenth resistor and a power indicator light;

[0011] The first end of the nineteenth resistor is grounded, the second end of the nineteenth resistor is connected to the first end of the power indicator light, and the second end of the power indicator light is connected to the first power supply terminal.

[0012] Optionally, the control circuit further includes: a sixteenth resistor, a twenty-second capacitor, and a reset switch;

[0013] The first end of the sixteenth resistor is connected to the first power supply terminal, the first end of the twenty-second capacitor is grounded, the second end of the sixteenth resistor is connected to the second end of the twenty-second capacitor, the first end of the reset switch, the third end of the reset switch, and the seventh end of the single-chip microcomputer, and the second end and the fourth end of the reset switch are connected and then grounded.

[0014] Optionally, the control circuit further includes: a sixteenth capacitor, a thirtieth capacitor, a twenty-fourth capacitor, a green indicator light, and a forty-ninth resistor;

[0015] The sixteenth capacitor is connected between the sixty-fourth end and the sixty-third end of the single-chip microcomputer, the first end of the thirtieth capacitor and the first end of the twenty-fourth capacitor are connected and then connected to the thirty-second end of the single-chip microcomputer, the second end of the thirtieth capacitor and the second end of the twenty-fourth capacitor are connected and then grounded, the first end of the forty-ninth resistor is grounded, the second end of the forty-ninth resistor is connected to the first end of the green indicator light, and the second end of the green indicator light is connected to the thirty-third end of the single-chip microcomputer.

[0016] Optionally, the drive circuit includes: a first switch unit, a second switch unit, a third switch unit, a first drive unit, a second drive unit, a third drive unit, and a fourth drive unit;

[0017] The first end of the first drive unit is connected to the twenty-ninth end of the single-chip microcomputer, the second end of the first drive unit is connected to the control end of the first switch unit, the control end of the second switch unit, and the first end of the second drive unit, the second end of the second drive unit is connected to the first end of the second switch unit and then grounded, the second end of the second switch unit is connected to the second end of the first switch unit and the first end of the third drive unit, the second end of the first switch unit is connected to the second power supply terminal, the second end of the third drive unit is connected to the control end of the third switch unit and the first end of the fourth drive unit, the second end of the fourth drive unit is connected to the second end of the third switch unit and the negative terminal of the lithium battery and then grounded, and the first end of the third switch unit is connected to the positive terminal of the lithium battery.

[0018] Optionally, the first switching unit includes a second MOS transistor, the second switching unit includes a third MOS transistor, the third switching unit includes a fourth MOS transistor, the first driving unit includes a forty-fifth resistor, the second driving unit includes a forty-sixth resistor, the third driving unit includes a forty-seventh resistor, and the fourth driving unit includes a forty-eighth resistor;

[0019] The first end of the forty-fifth resistor is connected to the twenty-ninth terminal of the single-chip microcomputer, the second end of the forty-fifth resistor is connected to the control terminal of the second MOS transistor, the control terminal of the third MOS transistor, and the first end of the forty-sixth resistor. The second end of the forty-sixth resistor is connected to the first end of the third MOS transistor and then grounded. The second end of the third MOS transistor is connected to the second end of the second MOS transistor and the first end of the forty-seventh resistor. The second end of the second MOS transistor is connected to the second power supply terminal. The second end of the forty-seventh resistor is connected to the control terminal of the fourth MOS transistor and the first end of the forty-eighth resistor. The second end of the forty-eighth resistor is connected to the second end of the fourth MOS transistor and the negative terminal of the lithium battery and then grounded. The first end of the fourth MOS transistor is connected to the positive terminal of the lithium battery.

[0020] Optionally, the display circuit includes: an LCD liquid crystal display screen;

[0021] The first end, second end, third end, fourth end, fifth end, sixth end, seventh end, eighth end, ninth end, tenth end, eleventh end, and twelfth end of the LCD liquid crystal display screen are respectively connected to the forty-second terminal, forty-third terminal, forty-fourth terminal, forty-fifth terminal, forty-first terminal, fortieth terminal, thirty-ninth terminal, thirty-eighth terminal, thirty-seventh terminal, thirty-sixth terminal, thirty-fifth terminal, and thirty-fourth terminal of the single-chip microcomputer.

[0022] Optionally, the display circuit further includes: a twenty-sixth capacitor, a twenty-seventh capacitor, and a twenty-eighth capacitor;

[0023] The twenty-eighth capacitor is connected between the fifty-fifth terminal and the fifty-sixth terminal of the single-chip microcomputer. The first end of the twenty-seventh capacitor is connected to the fifty-seventh terminal of the single-chip microcomputer. The first end of the twenty-sixth capacitor is connected to the fifty-eighth terminal of the single-chip microcomputer. The second end of the twenty-seventh capacitor is connected to the second end of the twenty-sixth capacitor and then grounded.

[0024] According to another aspect of the present invention, a driving control system for a lithium battery is provided. The driving control system for the lithium battery includes the driving control circuit for the lithium battery as described in any one of the above aspects.

[0025] The technical solution of the embodiment of the present utility model generates a short - circuit protection signal through a control circuit and transmits it to a drive circuit. The drive circuit controls the short - circuit of the lithium battery according to the short - circuit protection signal, so as to meet the short - circuit condition of the lithium battery; the short - circuit times of the lithium battery are displayed through a display circuit, so as to have the function of monitoring the short - circuit times of the lithium battery. In summary, the problem solved by the present utility model for the existing drive control circuit of the lithium battery is that it cannot meet the above - mentioned short - circuit condition and does not have the function of monitoring the short - circuit times of the lithium battery.

[0026] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 is a schematic structural diagram of a drive control circuit for a lithium battery provided according to an embodiment of the present utility model;

[0029] Figure 2 is a schematic circuit diagram of a control circuit provided according to an embodiment of the present utility model;

[0030] Figure 3 is a schematic circuit diagram of a drive circuit provided according to an embodiment of the present utility model;

[0031] Figure 4 is a schematic circuit diagram of a display circuit provided according to an embodiment of the present utility model. Detailed Embodiments

[0032] In order to enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present utility model are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] Figure 1 is a schematic structural diagram of a driving control circuit of a lithium battery according to an embodiment of the present utility model. Referring to Figure 1 , an embodiment of the present utility model provides a driving control circuit of a lithium battery. The driving control circuit of the lithium battery includes: a control circuit 10, a display circuit 20, and a driving circuit 30; the control circuit 10 is connected to the driving circuit 30, the driving circuit 30 is connected to the positive terminal P+ and the negative terminal P- of the lithium battery, the control circuit 10 is used to generate a short-circuit protection signal and transmit it to the driving circuit 30, and the driving circuit 30 is used to control the short circuit of the lithium battery according to the short-circuit protection signal; the control circuit 10 is connected to the display circuit 20, and the display circuit 20 is used to display the number of short circuits of the lithium battery.

[0035] Specifically, the control circuit 10 can be an MCU that can generate an internal frequency and the simplest system application circuit, the display circuit 20 can be an LCD display screen, and the driving circuit 30 can be composed of a push-pull circuit and an NMOS transistor. Connect a GPIO port of the control circuit 10 to the push-pull circuit, and finally drive an NMOS transistor to short-circuit the lithium battery, so as to finally achieve the purpose of short circuit.

[0036] Combining the above three circuits of the control circuit 10, the display circuit 20, and the driving circuit 30 can meet the previous conditions: short-circuit the positive and negative terminals of the lithium battery pack or the output terminals in the protection circuit; after the protection device operates, stand still for 1 minute, and set the GPIO port of the control circuit 10 to be turned off once every 1 minute; when short-circuiting, the total resistance of the external circuit is 80 mΩ ± 20 mΩ; the internal resistance of the driving circuit 30 is 30 mΩ, and including the internal resistance of the external connection wire, it meets the requirement of 60 mΩ to 100 mΩ. The number of cycles is 500 times. The control circuit 10 is set to end after 500 cycles are completed, and the display circuit 20 displays the current number of cycles in real time.

[0037] The technical solution of the embodiment of the present utility model generates a short - circuit protection signal through a control circuit and transmits it to a drive circuit. The drive circuit controls the short - circuit of the lithium battery according to the short - circuit protection signal, so as to meet the short - circuit condition of the lithium battery; the short - circuit times of the lithium battery are displayed through a display circuit, thus having the function of monitoring the short - circuit times of the lithium battery. In summary, the present utility model solves the problems existing in the existing drive control circuit of lithium batteries, that is, it cannot meet the above - mentioned short - circuit condition and does not have the function of monitoring the short - circuit times of lithium batteries.

[0038] Figure 2 is the circuit schematic diagram of a control circuit provided according to an embodiment of the present utility model. Refer to Figure 2 Optionally, the control circuit includes: a single - chip microcomputer U3, a twelfth capacitor C12, a seventeenth capacitor C17, a second crystal oscillator Y2, an eighteenth capacitor C18, a nineteenth capacitor C19, and a third crystal oscillator Y3; the first end of the twelfth capacitor C12 is connected to the first end of the seventeenth capacitor C17 and then grounded. The second end of the twelfth capacitor C12 is connected to the first end of the second crystal oscillator Y2 and the third terminal 3 of the single - chip microcomputer U3. The second end of the seventeenth capacitor C17 is connected to the second end of the second crystal oscillator Y2 and the fourth terminal 4 of the single - chip microcomputer U3; the first end of the eighteenth capacitor C18 is connected to the first end of the nineteenth capacitor C19 and then grounded. The second end of the eighteenth capacitor C18 is connected to the first end of the third crystal oscillator Y3 and the fifth terminal 5 of the single - chip microcomputer U3. The second end of the nineteenth capacitor C19 is connected to the second end of the third crystal oscillator Y3 and the sixth terminal 6 of the single - chip microcomputer U3.

[0039] Specifically, the single - chip microcomputer U3 is a micro - control unit (MCU) that can generate an internal frequency, and the control circuit is the simplest system application circuit.

[0040] Continue to refer to Figure 2 Optionally, the control circuit further includes: a nineteenth resistor R19 and a power - on indicator PWR RED; the first end of the nineteenth resistor R19 is grounded, the second end of the nineteenth resistor R19 is connected to the first end of the power - on indicator PWR RED, and the second end of the power - on indicator PWR RED is connected to the first power supply terminal VCC.

[0041] Continue to refer to Figure 2 Optionally, the control circuit further includes: a sixteenth resistor R16, a twenty - second capacitor C22, and a reset switch RST; the first end of the sixteenth resistor R16 is connected to the first power supply terminal VCC, the first end of the twenty - second capacitor C22 is grounded, the second end of the sixteenth resistor R16 is connected to the second end of the twenty - second capacitor C22, the first terminal 1 of the reset switch RST, the third terminal 3 of the reset switch RST, and the seventh terminal 7 of the single - chip microcomputer U3. The second terminal 2 and the fourth terminal 4 of the reset switch RST are connected and then grounded.

[0042] Specifically, the first power supply terminal VCC is used to supply power to the MCU, and the power indicator PWR RED facilitates observing whether the MCU is powered on; the reset switch RST can manually power on the MCU; the second power supply terminal DVDD is the power supply for the digital part, which is supplied by the internal LDO output of the MCU and is used to supply power to peripheral functions such as GPIO ports.

[0043] Continue to refer to Figure 2 Optionally, the control circuit further includes: the sixteenth capacitor C16, the thirtieth capacitor C30, the twenty-fourth capacitor C24, the green indicator LED3, and the forty-ninth resistor R49; the sixteenth capacitor C16 is connected between the sixty-fourth terminal 64 and the sixty-third terminal 63 of the microcontroller U3, the first ends of the thirtieth capacitor C30 and the twenty-fourth capacitor C24 are connected and then connected to the thirty-second terminal 32 of the microcontroller U3, the second ends of the thirtieth capacitor C30 and the twenty-fourth capacitor C24 are connected and then grounded, the first end of the forty-ninth resistor R49 is grounded, the second end of the forty-ninth resistor R49 is connected to the first end of the green indicator LED3, and the second end of the green indicator LED3 is connected to the thirty-third terminal 33 of the microcontroller U3.

[0044] Figure 3 is the circuit schematic diagram of a driving circuit provided by an embodiment of the present invention. Refer to Figure 2 and Figure 3 Optionally, the driving circuit 30 includes: a first switch unit 31, a second switch unit 32, a third switch unit 33, a first driving unit 34, a second driving unit 35, a third driving unit 36, and a fourth driving unit 37; the first end of the first driving unit 34 is connected to the twenty-ninth terminal 29 of the microcontroller U3, the second end of the first driving unit 34 is connected to the control end of the first switch unit 31, the control end of the second switch unit 32, and the first end of the second driving unit 35, the second end of the second driving unit 35 is connected to the first end of the second switch unit 32 and then grounded, the second end of the second switch unit 32 is connected to the second end of the first switch unit 31 and the first end of the third driving unit 36, the second end of the first switch unit 31 is connected to the second power supply terminal DVDD, the second end of the third driving unit 36 is connected to the control end of the third switch unit 33 and the first end of the fourth driving unit 37, the second end of the fourth driving unit 37 is connected to the second end of the third switch unit 33 and the negative terminal P- of the lithium battery and then grounded, and the first end of the third switch unit 33 is connected to the positive terminal P+ of the lithium battery.

[0045] Continue to refer to Figure 2 and Figure 3, optionally, the first switch unit 31 includes a second MOS transistor Q2, the second switch unit 32 includes a third MOS transistor Q3, the third switch unit 33 includes a fourth MOS transistor Q4, the first driving unit 34 includes a forty-fifth resistor R45, the second driving unit 35 includes a forty-sixth resistor R46, the third driving unit 36 includes a forty-seventh resistor R47, and the fourth driving unit 37 includes a forty-eighth resistor R48; a first end of the forty-fifth resistor R45 is connected to a twenty-ninth terminal 29 of the single-chip microcomputer U3, a second end of the forty-fifth resistor R45 is connected to a control end of the second MOS transistor Q2, a control end of the third MOS transistor Q3, and a first end of the forty-sixth resistor R46, a second end of the forty-sixth resistor R46 is grounded after being connected to a first end of the third MOS transistor Q3, a second end of the third MOS transistor Q3 is connected to a second end of the second MOS transistor Q2 and a first end of the forty-seventh resistor R47, a second end of the second MOS transistor Q2 is connected to a second power supply terminal DVDD, a second end of the forty-seventh resistor R47 is connected to a control end of the fourth MOS transistor Q4 and a first end of the forty-eighth resistor R48, a second end of the forty-eighth resistor R48 is grounded after being connected to a second end of the fourth MOS transistor Q4 and a negative terminal P- of the lithium battery, and a first end of the fourth MOS transistor Q4 is connected to a positive terminal P+ of the lithium battery.

[0046] Specifically, the second MOS transistor Q2 and the third MOS transistor Q3 form a push-pull circuit with a typical PN structure. The forty-fifth resistor R45 and the forty-seventh resistor R47 are used for filtering the gate pins of the second MOS transistor Q2 and the third MOS transistor Q3 to prevent misoperation midway. The forty-sixth resistor R46 and the forty-eighth resistor R48 are respectively used to improve the pull-down speed when the third MOS transistor Q3 and the fourth MOS transistor Q4 are turned off.

[0047] Figure 4 is a circuit schematic diagram of a display circuit provided according to an embodiment of the present invention. Refer to Figure 2 and Figure 4 , optionally, the display circuit includes: an LCD liquid crystal display screen; a first end 1, a second end 2, a third end 3, a fourth end 4, a fifth end 5, a sixth end 6, a seventh end 7, an eighth end 8, a ninth end 9, a tenth end 10, an eleventh end 11, and a twelfth end 12 of the LCD liquid crystal display screen are respectively connected to a forty-second terminal 42, a forty-third terminal 43, a forty-fourth terminal 44, a forty-fifth terminal 45, a forty-first terminal 41, a fortieth terminal 40, a thirty-ninth terminal 39, a thirty-eighth terminal 38, a thirty-seventh terminal 37, a thirty-sixth terminal 36, a thirty-fifth terminal 35, and a thirty-fourth terminal 34 of the single-chip microcomputer U3.

[0048] Specifically, the LCD liquid crystal display screen can be a common-anode LCD liquid crystal display screen for displaying the short-circuit times of the lithium battery.

[0049] Continue to refer to Figure 2 and Figure 4 , optionally, the display circuit further includes: a twenty-sixth capacitor C26, a twenty-seventh capacitor C27, and a twenty-eighth capacitor C28; the twenty-eighth capacitor C28 is connected between the fifty-fifth terminal 55 and the fifty-sixth terminal 56 of the single-chip microcomputer U3, the first end of the twenty-seventh capacitor C27 is connected to the fifty-seventh terminal 57 of the single-chip microcomputer U3, the first end of the twenty-sixth capacitor C26 is connected to the fifty-eighth terminal 58 of the single-chip microcomputer U3, and the second ends of the twenty-seventh capacitor C27 and the twenty-sixth capacitor C26 are connected and then grounded.

[0050] The embodiment of the present invention further provides a driving control system for a lithium battery, and the driving control system for the lithium battery includes the driving control circuit for the lithium battery provided in any embodiment of the present invention.

[0051] Since the driving control system for the lithium battery includes the driving control circuit for the lithium battery provided in any embodiment of the present invention, therefore, the above-mentioned driving control system for the lithium battery has the same beneficial effects as the driving control circuit for the lithium battery, and will not be elaborated here.

[0052] The above specific implementation manners do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A driving control circuit for a lithium battery, characterized in that: include: Control circuit, display circuit and drive circuit; The control circuit is connected to the drive circuit, the drive circuit is connected to the positive terminal and the negative terminal of the lithium battery, the control circuit is used to generate a short-circuit protection signal and transmit it to the drive circuit, and the drive circuit is used to control the lithium battery to short-circuit according to the short-circuit protection signal; The control circuit is connected to a display circuit, and the display circuit is used to display the number of short circuits of the lithium battery.

2. The circuit according to claim 1, characterized in that The control circuit comprises: a single chip microcomputer, a twelfth capacitor, a seventeenth capacitor, a second crystal oscillator, an eighteenth capacitor, a nineteenth capacitor, and a third crystal oscillator; The first end of the twelfth capacitor is connected to the first end of the seventeenth capacitor and then grounded, the second end of the twelfth capacitor is connected to the first end of the second crystal oscillator and the third end of the single-chip microcomputer, and the second end of the seventeenth capacitor is connected to the second end of the second crystal oscillator and the fourth end of the single-chip microcomputer; The first end of the eighteenth capacitor is connected to the first end of the nineteenth capacitor and then grounded, the second end of the eighteenth capacitor is connected to the first end of the third crystal oscillator and the fifth end of the single-chip microcomputer, and the second end of the nineteenth capacitor is connected to the second end of the third crystal oscillator and the sixth end of the single-chip microcomputer.

3. The circuit according to claim 2, characterized in that The control circuit also includes: a nineteenth resistor and a power indicator light; The first end of the nineteenth resistor is grounded, the second end of the nineteenth resistor is connected to the first end of the power indicator light, and the second end of the power indicator light is connected to the first power supply end.

4. The circuit according to claim 2, characterized in that The control circuit further includes: a sixteenth resistor, a twenty-second capacitor and a reset switch; The first end of the sixteenth resistor is connected to the first power supply end, the first end of the twenty-second capacitor is grounded, the second end of the sixteenth resistor is connected to the second end of the twenty-second capacitor, the first end of the reset switch, the third end of the reset switch and the seventh end of the single-chip microcomputer, and the second end and the fourth end of the reset switch are connected and grounded.

5. The circuit according to claim 2, characterized in that The control circuit further includes: a sixteenth capacitor, a thirtieth capacitor, a twenty-fourth capacitor, a green indicator light and a forty-ninth resistor; The sixteenth capacitor is connected between the sixty-fourth terminal and the sixty-third terminal of the single-chip computer, the first end of the thirtieth capacitor is connected to the first end of the twenty-fourth capacitor and then connected to the thirty-second terminal of the single-chip computer, the second end of the thirtieth capacitor is connected to the second end of the twenty-fourth capacitor and then grounded, the first end of the forty-ninth resistor is grounded, the second end of the forty-ninth resistor is connected to the first end of the green indicator light, and the second end of the green indicator light is connected to the thirty-third terminal of the single-chip computer.

6. The circuit according to claim 2, characterized in that The driving circuit comprises: a first switch unit, a second switch unit, a third switch unit, a first driving unit, a second driving unit, a third driving unit and a fourth driving unit; The first end of the first drive unit is connected to the twenty-ninth end of the single-chip microcomputer, the second end of the first drive unit is connected to the control end of the first switch unit, the control end of the second switch unit and the first end of the second drive unit, the second end of the second drive unit is connected to the first end of the second switch unit and then grounded, the second end of the second switch unit is connected to the second end of the first switch unit and the first end of the third drive unit, the second end of the first switch unit is connected to the second power supply end, the second end of the third drive unit is connected to the control end of the third switch unit and the first end of the fourth drive unit, the second end of the fourth drive unit is connected to the second end of the third switch unit and the negative terminal of the lithium battery and then grounded, and the first end of the third switch unit is connected to the positive terminal of the lithium battery.

7. The circuit according to claim 6, characterized in that The first switch unit includes a second MOS tube, the second switch unit includes a third MOS tube, the third switch unit includes a fourth MOS tube, the first drive unit includes a forty-fifth resistor, the second drive unit includes a forty-sixth resistor, the third drive unit includes a forty-seventh resistor, and the fourth drive unit includes a forty-eighth resistor; The first end of the forty-fifth resistor is connected to the twenty-ninth terminal of the single-chip computer, the second end of the forty-fifth resistor is connected to the control end of the second MOS tube, the control end of the third MOS tube and the first end of the forty-sixth resistor, the second end of the forty-sixth resistor is connected to the first end of the third MOS tube and then grounded, the second end of the third MOS tube is connected to the second end of the second MOS tube and the first end of the forty-seventh resistor, the second end of the second MOS tube is connected to the second power supply end, the second end of the forty-seventh resistor is connected to the control end of the fourth MOS tube and the first end of the forty-eighth resistor, the second end of the forty-eighth resistor is connected to the second end of the fourth MOS tube and the negative terminal of the lithium battery and then grounded, and the first end of the fourth MOS tube is connected to the positive terminal of the lithium battery.

8. The circuit according to claim 2, characterized in that The display circuit comprises: an LCD liquid crystal display screen; The first end, second end, third end, fourth end, fifth end, sixth end, seventh end, eighth end, ninth end, tenth end, eleventh end and twelfth end of the LCD display screen are respectively connected to the forty-second end, forty-third end, forty-fourth end, forty-fifth end, forty-first end, forty-ninth end, thirty-eighth end, thirty-seventh end, thirty-sixth end, thirty-fifth end and thirty-fourth end of the single-chip computer.

9. The circuit according to claim 2, characterized in that The display circuit further includes: a twenty-sixth capacitor, a twenty-seventh capacitor, and a twenty-eighth capacitor; The 28th capacitor is connected between the 55th terminal and the 56th terminal of the single-chip computer, the first end of the 27th capacitor is connected to the 57th terminal of the single-chip computer, the first end of the 26th capacitor is connected to the 58th terminal of the single-chip computer, and the second end of the 27th capacitor is connected to the second end of the 26th capacitor and then grounded.

10. A lithium battery driving control system, characterized in that: A driving control circuit comprising a lithium battery as described in any one of claims 1 to 9.

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