Discharge protection circuit and vehicle

Abstract

The invention discloses a discharge protection circuit and a vehicle. The discharge protection circuit comprises an energy consumption module, a self-locking module and a discharge switch module. The energy consumption module is connected between the driving power supply end of the motor and the input end of the discharge switch module, the output end of the discharge switch module is electrically connected with the grounding end, and the self-locking module is electrically connected between the driving power supply end and the control end of the discharge switch module; wherein the self-locking module is switched on in response to the condition that the output level of the driving power supply end is greater than a first level, and the discharge switch module is switched on along with the switch-on of the self-locking module. According to the embodiment of the invention, the technical problem that motor energy cannot be effectively released is solved.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and in particular, relates to a discharge protection circuit and a vehicle. Background Art

[0002] As the application scenarios of electrical equipment become more and more extensive, there are more and more devices driven by motors. For example, the motors used in vehicles include oil pump drive motors, window drive motors, tailgate drive motors, and seat drive motors. Since the motor is an inductive load, a high electromotive force will be generated at the power output end of the motor. At this time, if the energy generated by the motor is not released, it is easy to damage the related electronic components.

[0003] At present, the method used to release motor energy is to release energy by controlling the load device connected to the motor. However, when a power outage causes the motor to stop suddenly or the motor is dragged in the reverse direction after being powered off, when the motor generates energy, the motor is in a power-off or power-off state, and the load device connected to the motor cannot be controlled in time by the controller, resulting in the inability to effectively release the energy generated by the motor. Summary of the invention

[0004] The embodiments of the present application provide a discharge protection circuit and a vehicle, aiming to solve the technical problem that the motor energy cannot be effectively released.

[0005] In a first aspect, an embodiment of the present application provides a discharge protection circuit, the discharge protection circuit comprising: an energy consumption module, a self-locking module, and a discharge switch module;

[0006] The energy consumption module is connected between the driving power supply end of the motor and the input end of the discharge switch module, the output end of the discharge switch module is electrically connected to the ground end, and the self-locking module is electrically connected between the driving power supply end and the control end of the discharge switch module;

[0007] The self-locking module is turned on in response to the output level of the driving power supply terminal being greater than the first level, and the discharge switch module is turned on following the turning on of the self-locking module.

[0008] In some implementations of the first aspect, the discharge protection circuit further includes a comparison switch, an input end of the comparison switch is electrically connected to the driving power supply end, and an output end of the comparison switch is electrically connected to the control end of the self-locking module;

[0009] When the output level of the driving power supply terminal is greater than the second level, the comparison switch is turned on, and the self-locking module is turned on following the turning on of the comparison switch, wherein the second level is greater than the first level;

[0010] When the output level of the driving power supply end is less than or equal to the second level and the output level of the driving power supply end is greater than the first level, the comparison switch is turned off and the self-locking module remains turned on.

[0011] In some implementations of the first aspect, the self-locking module includes a voltage dividing module, a first switch module, a second switch module, and a third switch module;

[0012] The control terminal of the first switch is electrically connected to the output terminal of the comparison switch,

[0013] The control end of the second switch is electrically connected to the control end of the discharge switch module.

[0014] The input end of the first switch and the input end of the second switch are electrically connected to the control end of the third switch respectively.

[0015] The output end of the first switch and the output end of the second switch are electrically connected to the ground end respectively,

[0016] The voltage dividing module is electrically connected between the control end of the third switch and the comparison switch, and the input end of the third switch is electrically connected to the input end of the comparison switch;

[0017] When the output level of the driving power supply terminal is greater than the second level, the comparison switch is turned on, and the first switch, the second switch and the third switch are turned on respectively in response to the comparison switch being turned on;

[0018] When the output level of the driving power supply terminal is less than or equal to the second level and the output level of the driving power supply terminal is greater than the first level, the first switch is turned off in response to the comparison switch being turned off, and the second switch and the third switch remain turned on respectively.

[0019] In some implementations of the first aspect, the discharge protection circuit further includes a first control module and a second control module;

[0020] A first end of the first control module is electrically connected between the driving power supply end and the input end of the comparison switch, and a second end of the first control module is electrically connected to the ground end;

[0021] A first end of the second control module is electrically connected between the self-locking module and the control end of the discharge switch module, and a second end of the second control module is electrically connected to the ground end;

[0022] In a case where the first control module and the second control module are respectively controlled by the first target control level, the comparison module is turned on in response to the output level of the driving power supply terminal being greater than the second level.

[0023] In some implementations of the first aspect, the discharge protection circuit further includes a third control module, and the third control module includes a fourth switch module and a fifth switch module;

[0024] The control end of the fourth switch module is electrically connected between the driving power supply end and the first end of the first control module, the input end of the fourth switch module is electrically connected to the control end of the fifth switch module, and the output end of the fourth switch module is electrically connected to the ground end;

[0025] The input end of the fifth switch module is electrically connected to the driving power supply end, and the output end of the fifth switch module is electrically connected to the input end of the comparison switch;

[0026] The fourth switch module is turned on in response to the first target control level, and the fifth switch module is turned on in response to the turning on of the fourth switch module, so that the comparison module is turned on in response to the output level of the driving power supply terminal being greater than the second level.

[0027] In some implementations of the first aspect, when the first control module and the second control module are respectively controlled by a second target control level, the fourth switch module is turned off in response to the second target control level, and the fifth switch module is turned off in response to the turning off of the fourth switch module to control the comparison switch and the self-locking module to turn off.

[0028] In a second aspect, the present application provides a vehicle, characterized in that it includes a discharge protection circuit as in the first aspect or any implementable manner of the first aspect.

[0029] The discharge protection circuit and vehicle of the embodiment of the present application. The discharge protection circuit includes an energy consumption module, a self-locking module, and a discharge switch module, wherein the energy consumption module is connected between the driving power supply end of the motor and the input end of the discharge switch module, the output end of the discharge switch module is electrically connected to the ground end, and the self-locking module is electrically connected between the driving power supply end and the control end of the discharge switch module. Based on the discharge protection circuit provided by the embodiment of the present application, the output level of the driving power supply end can trigger the self-locking module to turn on or off. Therefore, there is no need for an external power supply to control the operation of the discharge protection circuit, and automatic discharge can be achieved to protect the electronic components related to the motor. In particular, when the output level of the driving power supply end is greater than the first level, the self-locking module can be controlled to turn on, and since the discharge switch module can be turned on following the turning on of the self-locking module, the output level of the driving power supply end can release energy through the output end of the discharge switch module via the energy consumption module, thereby avoiding the energy generated by the driving power supply end from damaging the electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1It is a structural schematic diagram of a first discharge protection circuit provided in an embodiment of the present application;

[0032] Figure 2 is a structural schematic diagram of a second discharge protection circuit provided in an embodiment of the present application;

[0033] Figure 3 is a structural schematic diagram of a third discharge protection circuit provided in an embodiment of the present application;

[0034] Figure 4 This is a schematic diagram of a fourth discharge protection circuit provided in an embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of the fifth discharge protection circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0038] To this end, an embodiment of the present application provides a discharge protection circuit and a vehicle. The discharge protection circuit does not require an external power supply to operate. When the output level of the driving power supply end of the motor is greater than a first level, automatic discharge is achieved to protect the electronic components related to the motor.

[0039] The discharge protection circuit provided in the embodiments of the present application is introduced below with reference to the accompanying drawings. Figure 1FIG. 1 is a schematic diagram showing a structure of a discharge protection circuit provided by an embodiment of the present application. Figure 1 As shown, the discharge protection circuit may include an energy consumption module 10 , a self-locking module 20 , and a discharge switch module 30 .

[0040] The energy consumption module 10 is connected between the driving power supply terminal (VBAT) of the motor and the input terminal of the discharge switch module 30, the output terminal of the discharge switch module 30 is electrically connected to the ground terminal, and the self-locking module 20 is electrically connected between the driving power supply terminal (VBAT) and the control terminal of the discharge switch module 30. The self-locking module 20 is turned on in response to the output level of the driving power supply terminal being greater than the first level, and the discharge switch module 30 is turned on following the turning on of the self-locking module 20.

[0041] Exemplarily, the energy consumption module 10 may be an energy consumption device, such as any one of a resistor, a capacitor and an inductor, or a combination of any multiple thereof.

[0042] The motor drive power supply terminal (VBAT) is the output terminal of the motor running energy. For example, the excess energy generated when the motor is running, the energy generated when the motor is reversely dragged, or the unused energy when the motor stops suddenly can be output through the drive power supply terminal (VBAT).

[0043] When the driving power supply terminal (VBAT) of the motor is greater than the first level, the self-locking module 20 is turned on in response to the first level. Since the self-locking module 20 is electrically connected to the control terminal of the discharge switch module 30, after the self-locking module 20 is turned on, the discharge switch module 30 can be turned on following the turning on of the self-locking module 20. Optionally, the first level can be the minimum level for controlling the discharge switch module 30 to be turned on, which is conducive to fully releasing the energy generated by the motor.

[0044] The discharge switch module 30 can use any one or any combination of components such as an insulated gate field effect transistor, an insulated gate bipolar transistor (IGBT), a high-power diode or a fast recovery diode.

[0045] Since the output end of the discharge switch module 30 is electrically connected to the ground end, after the discharge switch module 30 is turned on, the output level of the driving power supply end (VBAT) can release energy via the energy consumption module 10 and the output end of the discharge switch module 30 .

[0046] In the process of the motor releasing energy through the driving power supply terminal (VBAT), if the energy in the motor becomes less and less, the output level of the motor output through the driving power supply terminal (VBAT) will become smaller and smaller, until the driving power supply terminal (VBAT) of the motor is less than or equal to the first level, the discharge switch module 30 is turned off, that is, the discharge protection circuit can automatically stop running.

[0047] According to the discharge protection circuit provided in the embodiment of the present application, the output level of the driving power supply terminal (VBAT) can trigger the self-locking module 20 to turn on or off. Therefore, there is no need for an external power supply to control the operation of the discharge protection circuit, and automatic discharge can be achieved to protect the electronic components related to the motor. In particular, when the output level of the driving power supply terminal (VBAT) is greater than the first level, the self-locking module 20 can be controlled to turn on, and since the discharge switch module 30 can be turned on following the turning on of the self-locking module 20, the output level of the driving power supply terminal (VBAT) can release energy through the output end of the discharge switch module 30 via the energy consumption module 10, thereby effectively preventing the energy generated by the driving power supply terminal (VBAT) from damaging the electronic components.

[0048] In some embodiments, the discharge protection circuit may further include a comparison switch 40 , wherein an input end of the comparison switch 40 is electrically connected to the driving power supply end (VBAT), and an output end of the comparison switch 40 is electrically connected to the control end of the self-locking module 20 .

[0049] When the output level of the driving power supply terminal (VBAT) is greater than the second level, the comparison switch 40 is turned on, and the self-locking module 20 is turned on following the turning on of the comparison switch 40 , wherein the second level is greater than the first level.

[0050] When the output level of the driving power supply terminal (VBAT) is less than or equal to the second level and the output level of the driving power supply terminal (VBAT) is greater than the first level, the comparison switch 40 is turned off and the self-locking module 20 remains turned on.

[0051] For example, Figure 2 4 is a schematic diagram of the structure of the second discharge protection circuit provided in the embodiment of the present application. Specifically, the comparison switch 40 can determine whether the output level of the driving power supply terminal (VBAT) is greater than the second level. When the output level of the driving power supply terminal (VBAT) is greater than the second level, the comparison switch 40 is turned on, and then the self-locking module 20 and the discharge switch module 30 are turned on respectively to release the motor energy.

[0052] Optionally, the comparison switch 40 can use a transient voltage suppression diode (TVSDiode). When the output level of the driving power supply terminal (VBAT) is greater than the second level, the transient voltage suppression diode breaks down and is turned on. When the output level of the driving power supply terminal (VBAT) is less than or equal to the second level, the transient voltage suppression diode is cut off again and is turned off, thereby realizing rapid overvoltage protection for the motor. The comparison switch 40 can also be implemented in the form of an integrated circuit (IC), which can be turned on when the output level of the driving power supply terminal (VBAT) is greater than the second level, and turned off when the output level of the driving power supply terminal (VBAT) is less than or equal to the second level, thereby realizing rapid overvoltage protection for the motor.

[0053] In an embodiment of the present application, when the output level of the driving power supply terminal (VBAT) is less than or equal to the second level, and the output level of the driving power supply terminal (VBAT) is greater than the first level, the self-locking module 20 enters the self-locking mode, and the circuit remains discharged until the output level of the driving power supply terminal (VBAT) is less than or equal to the first level, the self-locking module 20 and the discharge switch module 30 are turned off, and the discharge protection circuit automatically stops running.

[0054] In some embodiments, the discharge protection circuit may further include a first control module 50 and a second control module 60 .

[0055] Specifically, the first end of the first control module 50 is electrically connected between the driving power supply end (VBAT) and the input end of the comparison switch 40, and the second end of the first control module 50 is electrically connected to the ground end; the first end of the second control module 60 is electrically connected between the self-locking module 20 and the control end of the discharge switch module 30, and the second end of the second control module 60 is electrically connected to the ground end.

[0056] When the first control module 50 and the second control module 60 are respectively controlled by the first target control level, the comparison module 40 is turned on in response to the output level of the driving power supply terminal (VBAT) being greater than the second level.

[0057] For example, Figure 3 is a schematic diagram of the structure of the third discharge protection circuit provided in the embodiment of the present application, combined with Figure 3As shown, the control terminal CTRL1 of the first control module 50 and the control terminal CTRL2 of the second control module 60 respectively apply the first target control level to the control terminal CTRL1 and the control terminal CTRL2 to respectively control the conduction of the first control module 50 and the second control module 60, or respectively apply the second target control level to the control terminal CTRL1 and the control terminal CTRL2 to respectively control the shutdown of the first control module 50 and the second control module 60.

[0058] For example, the first control module 50 is turned on in response to a preset low level, and the second control module 60 is turned on in response to a preset low level, and the first target control level can be the preset low level. Optionally, the levels applied to the control terminals CTRL1 and CTRL2 can be controlled by a microcontroller unit (MCU).

[0059] During normal operation of the motor, if the motor generates excess energy that needs to be released, or if the motor is shut down normally and there is still energy in the motor that needs to be released, a first target control level can be applied to the control terminal CTRL1 and the control terminal CTRL2 respectively, so that the comparison module 40 is turned on in response to the output level of the driving power supply terminal (VBAT) being greater than the second level, thereby releasing the motor energy.

[0060] In some embodiments, if the motor is powered off and then dragged in the reverse direction, or if the system suddenly loses power during the operation of the motor, the microcontroller unit loses power and does not work, which is equivalent to applying a preset low level to the control terminal CTRL1 and the control terminal CTRL2, respectively, thereby ensuring that the comparison module 40 can be turned on in response to the output level of the driving power supply terminal (VBAT) being greater than the second level, thereby releasing the motor energy.

[0061] In some embodiments, when the first control module and the second control module are respectively controlled by the second target control level, the fourth switch module is turned off in response to the second target control level, and the fifth switch module is turned off in response to the turning off of the fourth switch module to control the comparison switch and the self-locking module to turn off.

[0062] Exemplarily, the first control module 50 is turned off in response to a preset high level, and the second control module 60 is turned on in response to a preset high level, and the second target control level may be the preset high level.

[0063] During the process of the motor discharging through the energy consumption module 10, if you want to stop releasing energy, you can apply a preset high level to the control terminal CTRL1 and the control terminal CTRL2 respectively through the micro control unit, so that the discharge protection circuit can stop running and release energy. Alternatively, during the normal operation of the motor, if you need to prohibit the discharge protection circuit from discharging, you can apply a preset high level to the control terminal CTRL1 and the control terminal CTRL2 respectively.

[0064] In some embodiments, the discharge protection circuit may further include a third control module 70 , and the third control module 70 includes a fourth switch module 71 and a fifth switch module 72 .

[0065] Specifically, the control end of the fourth switch module 71 is electrically connected between the driving power supply end and the first end of the first control module 50, the input end of the fourth switch module 71 is electrically connected to the control end of the fifth switch module 72, and the output end of the fourth switch module 71 is electrically connected to the ground end; the input end of the fifth switch module 72 is electrically connected to the driving power supply end, and the output end of the fifth switch module is electrically connected to the input end of the comparison switch;

[0066] The fourth switch module 71 is turned on in response to the first target control level, and the fifth switch module 72 is turned on in response to the turning on of the fourth switch module, so that the comparison module 40 is turned on in response to the output level of the driving power supply terminal (VBAT) being greater than the second level.

[0067] The fourth switch module 71 and the fifth switch module 72 can respectively use any one or any combination of components such as insulated gate field effect transistors, insulated gate bipolar transistors (IGBT), high-power diodes or fast recovery diodes.

[0068] When the first target control level is applied to the control terminal CTRL1 and the control terminal CTRL2 respectively, the first control module 50 and the second control module 60 are turned on respectively, at which time, the level of the control terminal of the fourth switch module is pulled up, so that the fourth switch module 71 is turned on. After the fourth switch module 71 is turned on, a potential difference is generated between the control terminal of the fifth switch module 72 and the input terminal of the fifth switch module 72, so that the fifth switch module 72 is turned on, and then the comparison module 40 can be turned on in response to the output level of the driving power supply terminal (VBAT) being greater than the second level. Afterwards, the self-locking module 20 and the discharge switch module 30 are turned on respectively, so as to release the motor energy.

[0069] In some embodiments, the self-locking module 20 includes a voltage dividing module, a first switch module, a second switch module, and a third switch module;

[0070] The control end of the first switch module Q4 is electrically connected to the output end of the comparison switch module D1, the control end of the second switch module Q5 is electrically connected to the control end of the discharge switch module Q8, the input end of the first switch module Q4 and the input end of the second switch module Q5 are electrically connected to the control end of the third switch module Q6, the output end of the first switch module Q4 and the output end of the second switch are electrically connected to the ground end, the voltage divider module is electrically connected between the control end of the third switch module Q6 and the comparison switch D1, and the input end of the third switch module Q6 is electrically connected to the input end of the comparison switch D1;

[0071] When the output level of the driving power supply terminal (VBAT) is greater than the second level, the comparison switch D1 is turned on, and the first switch module Q4, the second switch module Q5 and the third switch module Q6 are turned on in response to the comparison switch D1 being turned on; when the output level of the driving power supply terminal (VBAT) is less than or equal to the second level, and the output level of the driving power supply terminal (VBAT) is greater than the first level, the first switch module Q4 is turned off in response to the comparison switch being turned off, and the second switch module Q5 and the third switch module Q6 remain turned on.

[0072] In order to clearly illustrate the discharge protection circuit provided in the embodiment of the present application, the discharge protection circuit is introduced below with reference to a specific example. Figure 5 This is a schematic diagram of the fifth discharge protection circuit provided in the embodiment of the present application. Figure 5 As shown, VBAT is the driving power supply end of the motor; Q1~Q8 are switch tubes, R1~R18 are configuration function resistors, R19 is an energy consumption resistor, which can be used as an energy consumption module 10 alone, R19 can be used to release energy, D1 can be used as a comparison switch 40, and D1 can specifically be a TVS tube.

[0073] In some embodiments, the discharge switch module may include a fifth switch tube and a fifth configuration functional resistor.

[0074] Continue to combine Figure 5 As shown, the energy consumption module 10 includes R19, the discharge switch module 20 may include a switch tube Q8 and a configuration function resistor R18, the self-locking module 20 may include a first switch module Q4, a second switch module Q5, a third switch module Q6 and configuration function resistors R9, R10, R12, and R14, and the comparison switch 40 may include a TVS tube D1.

[0075] In some embodiments, the first control module includes a first switch tube and a first configuration functional resistor, the second control module includes a second switch tube and a second configuration functional resistor, the fourth switch module includes a fourth switch tube and a fourth configuration functional resistor, and the fifth switch module includes a fifth switch tube and a fifth configuration functional resistor.

[0076] Specifically, the first control module 50 may include a first switch tube Q1 and first configuration functional resistors R1 and R2;

[0077] The second control module 60 may include a second switch tube Q7 and second configuration functional resistors R16 and R17;

[0078] The third control module 70 includes a fourth switch module 71 and a fifth switch module 72 . The fourth switch module 71 may include a third switch tube Q2 and third configuration functional resistors R4 and R5 . The fifth switch module 72 may include a fourth switch tube Q3 and fourth configuration functional resistors R6 and R7 .

[0079] During the normal operation of the motor, the micro-control unit can control the terminal CTRL1 and the control terminal CTRL2 to apply the second target control level. For example, the second target control level is a preset high level. At this time, Q1 is turned on, and the level of node 1 is a low level. Next, Q2 is turned off, and thus Q3 is turned off. At this time, all switch tubes after the output terminal of Q3 are turned off, and the discharge protection circuit is in a non-operating state.

[0080] When the motor needs to release energy, the micro-control unit can control the terminal CTRL1 and the control terminal CTRL2 to apply the first target control level. For example, the first target control level is a preset low level. At this time, Q1 is turned off, and the level of node 1 remains high. Next, Q2 is turned on, so that Q3 is turned on, and at the same time, the level of node 2 is the output level of the driving power supply terminal (VBAT). When the output level of the driving power supply terminal (VBAT) is greater than the reverse breakdown level of the TVS tube D1, D1 breaks down. At this time, the level of node 3 is pulled up, and then Q4 and Q6 are turned on. At the same time, the level of node 4 is pulled up to the output level of the driving power supply terminal (VBAT). The level of node 5 is also pulled up through the voltage divider R15 and R18. At this time, Q8 is turned on. Therefore, the output level of the driving power supply terminal (VBAT) can generate a path from R19, and the energy generated by the motor can be consumed through R19. In addition, since the level of node 4 is pulled high, Q5 is turned on, and the output level of the driving power supply end (VBAT) will be reduced through the consumption of R19. When the VBAT level drops below the reverse breakdown level of the TVS tube D1, D1 is cut off again, and the level of node 3 is pulled low. At this time, Q4 will be turned off, but since Q5 is already turned on, Q6 will remain on, thereby realizing the self-locking function. In this way, Q8 is kept on during the process of the output level of the driving power supply end (VBAT) decreasing, until the output level of the driving power supply end (VBAT) drops to a very low level and Q8 cannot be turned on.

[0081] According to the embodiment of the present application, there is no need for an external power supply to control the operation of the discharge protection circuit, and automatic discharge can be achieved to protect the electronic components related to the motor. In particular, when the output level of the driving power supply end is greater than the first level, the self-locking module can be controlled to be turned on, and since the discharge switch module can be turned on following the turning on of the self-locking module, the output level of the driving power supply end can release energy through the output end of the discharge switch module via the energy consumption module, thereby preventing the energy generated by the driving power supply end from damaging the electronic components.

[0082] Optionally, when the discharge protection circuit is in the process of self-locking discharge, if you want to stop releasing the motor energy, you can apply a second target control level through the control terminal CTRL2 to turn on Q7, and then the level of node 5 is pulled down, turning off Q8, so that the rapid discharge protection circuit stops running and the motor stops releasing energy.

[0083] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A discharge protection circuit, characterized in that: The discharge protection circuit comprises: an energy consumption module, a self-locking module, and a discharge switch module; The energy consumption module is connected between the driving power supply end of the motor and the input end of the discharge switch module, the output end of the discharge switch module is electrically connected to the ground end, and the self-locking module is electrically connected between the driving power supply end and the control end of the discharge switch module; The self-locking module is turned on in response to the output level of the driving power supply end being greater than the first level, and the discharge switch module is turned on following the turning on of the self-locking module.

2. The discharge protection circuit according to claim 1, characterized in that: The discharge protection circuit further includes a comparison switch, wherein an input end of the comparison switch is electrically connected to the driving power supply end, and an output end of the comparison switch is electrically connected to the control end of the self-locking module; When the output level of the driving power supply terminal is greater than a second level, the comparison switch is turned on, and the self-locking module is turned on following the turning on of the comparison switch, wherein the second level is greater than the first level; When the output level of the driving power supply end is less than or equal to the second level and the output level of the driving power supply end is greater than the first level, the comparison switch is turned off and the self-locking module remains turned on.

3. The discharge protection circuit according to claim 2, characterized in that: The self-locking module includes a voltage dividing module, a first switch module, a second switch module and a third switch module; The control end of the first switch is electrically connected to the output end of the comparison switch, The control end of the second switch is electrically connected to the control end of the discharge switch module. The input end of the first switch and the input end of the second switch are electrically connected to the control end of the third switch respectively. The output end of the first switch and the output end of the second switch are electrically connected to the ground end respectively, The voltage dividing module is electrically connected between the control end of the third switch and the comparison switch, and the input end of the third switch is electrically connected to the input end of the comparison switch; When the output level of the driving power supply terminal is greater than the second level, the comparison switch is turned on, and the first switch, the second switch and the third switch are respectively turned on in response to the comparison switch being turned on; When the output level of the driving power supply terminal is less than or equal to the second level and the output level of the driving power supply terminal is greater than the first level, the first switch is turned off in response to the comparison switch being turned off, and the second switch and the third switch remain turned on respectively.

4. The discharge protection circuit according to claim 2, characterized in that: The discharge protection circuit also includes a first control module and a second control module; The first end of the first control module is electrically connected between the driving power supply end and the input end of the comparison switch, and the second end of the first control module is electrically connected to the ground end; The first end of the second control module is electrically connected between the self-locking module and the control end of the discharge switch module, and the second end of the second control module is electrically connected to the ground end; In a case where the first control module and the second control module are respectively controlled by a first target control level, the comparison module is turned on in response to the output level of the driving power supply terminal being greater than a second level.

5. The discharge protection circuit according to claim 4, characterized in that: The discharge protection circuit further includes a third control module, and the third control module includes a fourth switch module and a fifth switch module; Wherein, the control end of the fourth switch module is electrically connected between the driving power supply end and the first end of the first control module, the input end of the fourth switch module is electrically connected to the control end of the fifth switch module, and the output end of the fourth switch module is electrically connected to the ground end; The input end of the fifth switch module is electrically connected to the driving power supply end, and the output end of the fifth switch module is electrically connected to the input end of the comparison switch; The fourth switch module is turned on in response to the first target control level, and the fifth switch module is turned on in response to the fourth switch module being turned on, so that the comparison module is turned on in response to the output level of the driving power supply terminal being greater than the second level.

6. The discharge protection circuit according to claim 5, characterized in that: When the first control module and the second control module are respectively controlled by a second target control level, the fourth switch module is turned off in response to the second target control level, and the fifth switch module is turned off in response to the turning off of the fourth switch module to control the comparison switch and the self-locking module to turn off.

7. The discharge protection circuit according to claim 5, characterized in that: The first control module includes a first switch tube and a first configuration functional resistor, the second control module includes a second switch tube and a second configuration functional resistor, the fourth switch module includes a third switch tube and a third configuration functional resistor, and the fifth switch module includes a fourth switch tube and a fourth configuration functional resistor.

8. The discharge protection circuit according to claim 1, characterized in that: The discharge switch module includes a fifth switch tube and a fifth configuration functional resistor.

9. The discharge protection circuit according to claim 2, characterized in that: The comparison switch includes a transient voltage suppression diode.

10. A vehicle, characterized in that: The invention comprises a discharge protection circuit as claimed in any one of claims 1 to 9.

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