A charge discharge circuit, a vehicle-mounted control system, and a vehicle

Abstract

This invention discloses a charge discharge circuit, an on-board control system, and a vehicle, relating to the field of vehicle control. The charge discharge circuit includes a first controllable switch module and a second controllable switch module. When the output voltage of the power supply fluctuates, the main control module controls the voltage conversion module to stop outputting, the first controllable switch module is turned off, and the second controllable switch module is turned on, allowing the charge accumulated on the decoupling capacitor to be quickly discharged through the second controllable switch module. When the output voltage is not faulty, the main control module controls the voltage conversion module to operate normally to maintain the voltage output. At this time, the first controllable switch module is turned on, and the second controllable switch module is turned off, allowing the entire on-board control system to power on and operate normally. Therefore, this solution eliminates the need to extract an additional control signal from the main control module and provides a residual voltage discharge path when the output voltage fluctuates without affecting the function of the on-board control system, ensuring that the internal logic judgment of the storage module is not disturbed by voltage fluctuations.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a charge discharge circuit, an on-board control system, and a vehicle. Background Technology

[0002] Currently, common intelligent driving domain control systems include one or more System-on-Chips (SoCs) for processing sensor data, one or more eMMCs (embedded MultiMedia Cards) for storing user data, and one or more power supply chips for power supply, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an in-vehicle control system in the prior art. In this system, the voltage output from the battery power supply is processed by DC-DC converter 11 (Direct Current-Direct Current) to power the MCU. The voltage output from the battery power supply is processed by DC-DC converter 12 and then split into two paths. One path powers the SOC via DC-DC converter 21, and the other path powers the eMMC via DC-DC converter 22. The MCU can output enable signal 1 to drive DC-DC converter 22, enable signal 2 to drive DC-DC converter 21, and enable signal 3 to drive DC-DC converter 12. A decoupling capacitor Cap is also provided near the eMMC.

[0003] The operating conditions of a car are very complex. During operations such as ignition, battery depletion, battery charging and discharging, and battery replacement, the output of the battery power supply KL30 may fluctuate. This fluctuation can lead to power supply abnormalities. At this time, the state of the MCU is uncertain or uncontrolled. When enable signals 1, 2, and 3 change from high to low, DC-DC converters 12, 21, and 22 all stop outputting, and the eMMC is forced to power down and reset. During this process, the charge accumulated on the decoupling capacitor Cap cannot be discharged and residual voltage remains. This residual voltage may cause logic judgment failures within the eMMC. For example, when the eMMC writes data, it relies on the level switching of some internal circuit structures for logic judgment. Due to the presence of residual voltage, a logic that was originally judged as 0 may be judged as 1. Even if the battery power supply KL30 returns to normal later, this misjudgment has already existed and been recorded, thus affecting the accuracy of data storage.

[0004] Therefore, how to design a residual charge discharge scheme to ensure reliable discharge of the decoupling capacitor charge is an urgent problem to be solved. Summary of the Invention

[0005] In view of this, the present invention provides a charge discharge circuit, an on-board control system, and a vehicle, which provides a residual voltage discharge path when the output voltage fluctuates without requiring an additional control signal to be drawn from the main control module and without affecting the function of the on-board control system, thus ensuring that the internal logic judgment of the storage module is not disturbed by voltage fluctuations.

[0006] To address the aforementioned technical problems, this application provides a charge discharge circuit applied to an vehicle control system. The vehicle control system includes a storage module, a main control module, a decoupling capacitor, and a voltage conversion module. The power input terminal of the voltage conversion module is connected to a power supply, the control terminal of the voltage conversion module is connected to the main control module, the first power output terminal of the voltage conversion module is connected to the power input terminal of the main control module, and the second power output terminal of the voltage conversion module is connected to one end of the decoupling capacitor and the power input terminal of the storage module, respectively. The other end of the decoupling capacitor is grounded. The main control module drives the voltage conversion module to operate normally to maintain voltage output when the output voltage of the power supply does not fluctuate, and controls the voltage conversion module to stop outputting when the output voltage fluctuates.

[0007] The charge discharge circuit includes a first controllable switch module and a second controllable switch module;

[0008] The control terminal of the first controllable switch module is connected to the control terminal of the voltage conversion module. The first terminal is connected to the power supply input terminal of the voltage conversion module and the control terminal of the second controllable switch module, respectively. The second terminal is grounded and is used to turn off when the main control module controls the voltage conversion module to stop outputting, and to turn on when the main control module drives the voltage conversion module to work normally.

[0009] The first terminal of the second controllable switch module is connected to one end of the decoupling capacitor, and the second terminal is grounded, which is used to turn on when the first controllable switch module is turned off and turn off when the first controllable switch module is turned on.

[0010] Furthermore, the first controllable switch module includes a first controllable switch and a first resistor;

[0011] The first end of the first controllable switch serves as the first end of the first controllable switch module. The second end of the first controllable switch is connected to one end of the first resistor, and the common terminal of the connection serves as the second end of the first controllable switch module. The control end of the first controllable switch is connected to the other end of the first resistor, and the common terminal of the connection serves as the control end of the first controllable switch module.

[0012] Furthermore, the main control module includes an enable control module and a data processing module; the voltage conversion module includes a first conversion submodule and a second conversion submodule;

[0013] The power input terminal of the first conversion submodule is connected to the power supply, and the power output terminal is connected to the power input terminal of the enable control module. It is used to perform voltage conversion when it receives a wake-up prompt signal through its own wake-up input terminal, so as to supply power to the enable control module and enable the enable control module to switch from sleep mode to normal working mode.

[0014] The power input terminal of the second conversion submodule is connected to the power supply and the first terminal of the first controllable switch module, respectively. The first power output terminal is connected to the data processing module, and the second power output terminal is connected to one end of the decoupling capacitor and the power input terminal of the storage module, respectively. The control terminal is connected to the control terminal of the enable control module and the first controllable switch module, respectively, and is used to perform voltage conversion according to the enable signal sent by the enable control module after it switches to the normal working mode and when the output voltage of the power supply does not fluctuate, so as to supply power to the data processing module and the storage module; and to stop voltage conversion according to the stop signal sent by the enable control module after it switches to the normal working mode and when the output voltage fluctuates, or when the enable signal is not received.

[0015] The second controllable switch module is also used to turn on when the first conversion submodule does not receive the wake-up prompt signal and the output voltage of the power supply is greater than its own turn-on voltage;

[0016] The first controllable switch module is also used to turn off when the enabling control module is in the sleep mode.

[0017] Furthermore, the charge discharge circuit also includes a second resistor;

[0018] One end of the second resistor is connected to the power supply input terminal of the voltage conversion module, and the other end of the second resistor is connected to the control terminal of the second controllable switch module and the first terminal of the first controllable switch module.

[0019] Furthermore, the charge discharge circuit also includes a third resistor;

[0020] One end of the third resistor is connected to one end of the decoupling capacitor, and the other end of the third resistor is connected to the first end of the second controllable switch module.

[0021] Furthermore, the second controllable switch module includes a second controllable switch and a fourth resistor;

[0022] The control terminal of the second controllable switch is connected to one end of the fourth resistor, and the common terminal of the connection is used as the control terminal of the second controllable switch module. The first end of the second controllable switch is used as the first end of the second controllable switch module. The second end of the second controllable switch is connected to the other end of the fourth resistor, and the common terminal of the connection is used as the second end of the second controllable switch module.

[0023] Furthermore, the second controllable switch module also includes a filter capacitor;

[0024] The filter capacitor is connected in parallel with the fourth resistor.

[0025] Furthermore, the second controllable switch module also includes a first Zener diode and a second Zener diode;

[0026] The anode of the first Zener diode is connected to the control terminal of the second controllable switch, the cathode of the first Zener diode is connected to the cathode of the second Zener diode, and the anode of the second Zener diode is connected to the second terminal of the second controllable switch.

[0027] To address the aforementioned technical problems, this application also provides an on-board control system, including a storage module, a main control module, a decoupling capacitor and a voltage conversion module, and further including the charge discharge circuit as described above;

[0028] The power supply input terminal of the voltage conversion module is connected to the power supply and the first terminal of the charge discharge circuit. The control terminal is connected to the second terminal of the main control module and the charge discharge circuit. The first power supply output terminal is connected to the power supply input terminal of the main control module. The second power supply output terminal is connected to one end of the decoupling capacitor, the third terminal of the charge discharge circuit, and the power supply input terminal of the storage module.

[0029] The other end of the decoupling capacitor is grounded; the fourth end of the charge discharge circuit is grounded.

[0030] To address the aforementioned technical problems, this application also provides a vehicle, including the vehicle control system described above.

[0031] This application provides a charge discharge circuit, an on-board control system, and a vehicle. The charge discharge circuit includes a first controllable switch module and a second controllable switch module. The control terminal of the first controllable switch module is connected to the control terminal of a voltage conversion module. The first terminal is connected to both the power supply input terminal of the voltage conversion module and the control terminal of the second controllable switch module, and the second terminal is grounded. The first terminal of the second controllable switch module is connected to one end of a decoupling capacitor, and the second terminal is grounded. When the output voltage of the power supply fluctuates, the main control module controls the voltage conversion module to stop outputting. At this time, the first controllable switch module is turned off and the second controllable switch module is turned on, so that the charge accumulated on the decoupling capacitor is quickly discharged through the second controllable switch module, thereby ensuring that the output voltage fluctuation does not affect the internal logic judgment of the storage module. When the output voltage is not faulty, the main control module controls the voltage conversion module to work normally to maintain the voltage output. At this time, the first controllable switch module is turned on and the second controllable switch module is turned off, and the entire on-board control system is powered and operates normally. As can be seen, this solution provides a residual voltage discharge path when the output voltage fluctuates without affecting the function of the vehicle control system. This ensures that the internal logic judgment of the storage module is not affected by voltage fluctuations, and there is no need to draw an additional control signal from the main control module, thus avoiding the waste of control interface resources. Combined with the control method of the main control module for the voltage conversion module based on whether the output voltage fluctuates, the control of the first controllable switch module and the second controllable switch module can be realized simultaneously, which is beneficial to practical applications.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of an on-board control system in the prior art;

[0035] Figure 2 A schematic diagram of a charge discharge circuit provided by the present invention;

[0036] Figure 3 This is a schematic diagram of another charge discharge circuit provided by the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of an on-board control system provided by the present invention. Detailed Implementation

[0038] The core of this invention is to provide a charge discharge circuit, an on-board control system, and a vehicle. Without needing to draw an additional control signal from the main control module and without affecting the function of the on-board control system, it provides a residual voltage discharge path when the output voltage fluctuates, ensuring that the internal logic judgment of the storage module is not disturbed by voltage fluctuations.

[0039] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0040] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of an on-board control system in the prior art. Figure 2 This is a schematic diagram of a charge discharge circuit provided by the present invention. Figure 3 This is a schematic diagram of another charge discharge circuit provided by the present invention.

[0042] This charge discharge circuit is applied to an on-board control system, which includes a storage module 1, a main control module 2, a decoupling capacitor Cap, and a voltage conversion module 3. The power input terminal of the voltage conversion module 3 is connected to the power supply, the control terminal of the voltage conversion module 3 is connected to the main control module 2, the first power output terminal of the voltage conversion module 3 is connected to the power input terminal of the main control module 2, the second power output terminal of the voltage conversion module 3 is connected to one end of the decoupling capacitor Cap and the power input terminal of the storage module 1, and the other end of the decoupling capacitor Cap is grounded. The main control module 2 is used to drive the voltage conversion module 3 to work normally to maintain voltage output when the output voltage of the power supply does not fluctuate, and to control the voltage conversion module 3 to stop output when the output voltage fluctuates.

[0043] The charge discharge circuit includes a first controllable switch module 4 and a second controllable switch module 5;

[0044] The control terminal of the first controllable switch module 4 is connected to the control terminal of the voltage conversion module 3. The first terminal is connected to the power supply input terminal of the voltage conversion module 3 and the control terminal of the second controllable switch module 5 respectively. The second terminal is grounded and is used to turn off when the main control module 2 controls the voltage conversion module 3 to stop output, and to turn on when the main control module 2 drives the voltage conversion module 3 to work normally.

[0045] The first end of the second controllable switch module 5 is connected to one end of the decoupling capacitor Cap, and the second end is grounded. It is used to turn on when the first controllable switch module 4 is turned off and to turn off when the first controllable switch module 4 is turned on.

[0046] In this embodiment, considering the following Figure 1 Taking the vehicle control system shown as an example, when the output voltage of the power supply fluctuates, the charge accumulated on the decoupling capacitor Cap cannot be discharged and there is residual voltage. This residual voltage may cause logic judgment failure inside the eMMC. To this end, this application provides a charge discharge circuit to provide a residual voltage discharge path when the output voltage fluctuates.

[0047] Specifically, the storage module 1 here may include an eMMC, and the main control module 2 may include an MCU (Micro Controller Unit) and a SOC. Under normal operating conditions, the MCU can monitor the output voltage of the power supply. When the output voltage of the power supply does not fluctuate, it sends an enable signal to the voltage conversion module 3 to drive the voltage conversion module 3 to work normally and output voltage to provide power. When the output voltage fluctuates, it sends a stop signal to the voltage conversion module 3 or stops sending the above enable signal to control the voltage conversion module 3 to stop outputting voltage.

[0048] The charge discharge circuit includes a first controllable switch module 4 and a second controllable switch module 5. From the perspective of implementation principle, when the power supply output voltage fluctuates, the main control module 2 controls the voltage conversion module 3 to stop outputting. Simultaneously, the first controllable switch module 4 is turned off. Since the power supply output voltage still exists at this time, and the turn-on voltage of the second controllable switch module 5 is very small, the output voltage is greater than the turn-on voltage of the second controllable switch module 5. Therefore, the second controllable switch module 5 is turned on, and the charge accumulated on the decoupling capacitor Cap is quickly discharged through the second controllable switch module 5, thus ensuring that the output voltage fluctuation does not affect the internal logic judgment of the storage module 1. When the output voltage is not faulty, the main control module 2 controls the voltage conversion module 3 to work normally to maintain voltage output. Simultaneously, the first controllable switch module 4 is turned on, and the second controllable switch module 5 is turned off, allowing the entire vehicle control system to power on and operate normally.

[0049] It should also be noted that the power source here can be the vehicle's battery power supply KL30. Understandably, the residual charge on the decoupling capacitor Cap is discharged very quickly through the conducting second controllable switch module 5. By the time the power supply output voltage returns to normal, allowing the main control module 2 to resume normal operation, and then the main control module 2 controls the voltage conversion module 3 to achieve voltage output, the discharge process has already reliably completed. This ensures that when the storage module 1 is powered on again, there is no residual voltage on the decoupling capacitor Cap that would affect the internal logic judgment of the storage module 1.

[0050] In summary, this application provides a charge discharge circuit. This solution provides a residual voltage discharge path when the output voltage fluctuates without affecting the function of the vehicle control system. This ensures that the internal logic judgment of the storage module 1 is not disturbed by voltage fluctuations, and there is no need to draw an additional control signal from the main control module 2, thus avoiding the waste of control interface resources. Combined with the control method of the main control module 2 on the voltage conversion module 3 according to whether the output voltage fluctuates, the control of the first controllable switch module 4 and the second controllable switch module 5 can be realized simultaneously, which is beneficial to practical applications.

[0051] Based on the above embodiments:

[0052] In some embodiments, the first controllable switch module 4 includes a first controllable switch Q1 and a first resistor R1;

[0053] The first end of the first controllable switch Q1 serves as the first end of the first controllable switch module 4. The second end of the first controllable switch Q1 is connected to one end of the first resistor R1, and the common terminal of the connection serves as the second end of the first controllable switch module 4. The control end of the first controllable switch Q1 is connected to the other end of the first resistor R1, and the common terminal of the connection serves as the control end of the first controllable switch module 4.

[0054] Specifically, such as Figure 3 As shown, the first controllable switch Q1 can be an N-type MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), and the first resistor R1 is used for voltage clamping to ensure the safe operation of the first controllable switch Q1. It should be noted that the resistance value of the first resistor R1 is not particularly limited here, and can be selected according to the principle of ensuring the safe operation of the circuit.

[0055] In some embodiments, the main control module 2 includes an enable control module 221 and a data processing module 222; the voltage conversion module 3 includes a first conversion submodule 31 and a second conversion submodule 32.

[0056] The power input terminal of the first conversion submodule 31 is connected to the power supply, and the power output terminal is connected to the power input terminal of the enable control module 221. It is used to perform voltage conversion when it receives a wake-up prompt signal through its own wake-up input terminal, so as to supply power to the enable control module 221 and enable the enable control module 221 to switch from sleep mode to normal working mode.

[0057] The power input terminal of the second conversion submodule 32 is connected to the power supply and the first terminal of the first controllable switch module 4, respectively. The first power output terminal is connected to the data processing module 222, and the second power output terminal is connected to one end of the decoupling capacitor Cap and the power input terminal of the storage module 1, respectively. The control terminal is connected to the control terminal of the enable control module 221 and the first controllable switch module 4, respectively. It is used to perform voltage conversion according to the enable signal sent by the enable control module 221 after it switches to normal working mode and the output voltage of the power supply does not fluctuate, so as to supply power to the data processing module 222 and the storage module 1. It stops voltage conversion according to the stop signal sent by the enable control module 221 after it switches to normal working mode and the output voltage fluctuates, or when no enable signal is received.

[0058] The second controllable switch module 5 is also used to turn on when the first conversion submodule 31 does not receive a wake-up prompt signal and the output voltage of the power supply is greater than its own turn-on voltage.

[0059] The first controllable switch module 4 is also used to shut down when the enable control module 221 is in sleep mode.

[0060] In this embodiment, preferably, the enable signal can be a high-level signal, and the corresponding stop signal is a low-level signal, or the control terminal of the second conversion submodule 32 is at a low level when no enable signal is sent, thereby stopping the voltage conversion.

[0061] Specifically, the enable control module 221 can be an MCU, and the data processing module 222 can be a SOC, such as... Figure 3As shown, the second conversion submodule 32 may include a third conversion submodule 321, a fourth conversion submodule 322, and a fifth conversion submodule 323; the first output control terminal of the enable control module 221 is connected to the control terminal of the third conversion submodule 321, the second output control terminal of the enable control module 221 is connected to the control terminal of the fourth conversion submodule 322, and the third output control terminal of the enable control module 221 is connected to the control terminal of the fifth conversion submodule 323; the power supply input terminal of the third conversion submodule 321 is connected to the power supply and the first terminal of the first controllable switch module 4, respectively; the power supply output terminal of the third conversion submodule 321 is connected to the power supply input terminals of the fourth conversion submodule 322 and the fifth conversion submodule 323, respectively; the power supply output terminal of the fourth conversion submodule 322 is connected to the power supply input terminal of the SOC; and the power supply output terminal of the fifth conversion submodule 323 is connected to the power supply input terminal of the eMMC. Figure 3 The control terminal of the fifth conversion submodule 323 is connected to the control terminal of the first controllable switch module 4. In practical applications, the control terminal of the fourth conversion submodule 322 or the control terminal of the third conversion submodule 321 can also be connected to the control terminal of the first controllable switch module 4. More specifically, each conversion submodule here can be a DC-DC converter. The first output control terminal of the MCU can be the first GPIO port (General Purpose Input Output), the second output control terminal of the MCU can be the second GPIO port, and the third output control terminal of the MCU can be the third GPIO port. The SOC can also be connected to the eMMC, such as connecting the clock port of the SOC to the clock port of the eMMC. The interfaces can be connected according to the actual application requirements.

[0062] Taking the fifth conversion submodule 323 as an example, the control principle of the enable control module 221 is explained. When the enable control module 221 is in normal working mode and the output voltage of the power supply does not fluctuate, the enable control module 221 sends a third enable signal to the fifth conversion submodule 323 through its third output control terminal, so that the fifth conversion submodule 323 can perform voltage conversion normally and supply power to the storage module 1. When the enable control module 221 is in normal working mode and the output voltage fluctuates, the state of the enable control module 221 is uncertain. It stops sending the third enable signal to the fifth conversion submodule 323 or sends a stop signal to the fifth conversion submodule 323, thereby causing the fifth conversion submodule 323 to stop outputting, that is, to stop supplying power to the storage module 1.

[0063] The specific manner in which the wake-up prompt signal received by the first conversion submodule 31 includes, but is not limited to, when the user presses the ignition switch or inserts the car key to start the vehicle, it is considered to have received a wake-up prompt signal. In this case, the first conversion submodule 31 converts the power supply output voltage to an acceptable supply voltage for the enable control module 221, thereby waking the enable control module 221 from sleep mode and switching it to normal operating mode. It can be understood that after switching to normal operating mode, the enable control module 221 will control the second conversion submodule 32 to operate based on whether the output voltage fluctuates, thereby causing the first controllable switch module 4 and the second controllable switch module 5 to operate synchronously.

[0064] When no wake-up prompt signal is received, since the power supply is outputting normally and the turn-on voltage of the second controllable switch module 5 is very small, the second controllable switch module 5 is turned on to ensure that the residual voltage on the decoupling capacitor Cap is reliably released. As for the first controllable switch module 4, since the enable control module 221 is in sleep mode at this time, no enable signal is issued, and the first controllable switch module 4 is turned off synchronously.

[0065] Furthermore, it is understandable that the time required from receiving the wake-up prompt signal to enabling the control module 221 switching from sleep mode to normal operation mode and then to outputting the enable signal is definitely greater than the time required for the residual charge on the decoupling capacitor Cap to be discharged through the conducting second controllable switch module 5. Therefore, it is ensured that there is no residual voltage on the decoupling capacitor Cap that affects its internal logic judgment before the storage module 1 is officially powered on.

[0066] In some embodiments, the charge discharge circuit further includes a second resistor R2;

[0067] One end of the second resistor R2 is connected to the power supply input terminal of the voltage conversion module 3, and the other end of the second resistor R2 is connected to the control terminal of the second controllable switch module 5 and the first terminal of the first controllable switch module 4, respectively.

[0068] Specifically, the second resistor R2 is used for current limiting to provide current limiting protection for the first controllable switch module 4 and the second controllable switch module 5. It can be understood that the resistance value of the second resistor R2 is not specifically limited here, and can be selected according to the principle of ensuring the safe operation of the circuit.

[0069] In some embodiments, the charge discharge circuit further includes a third resistor R3;

[0070] One end of the third resistor R3 is connected to one end of the decoupling capacitor Cap, and the other end of the third resistor R3 is connected to the first end of the second controllable switch module 5.

[0071] Specifically, the third resistor R3 is used for current limiting to provide current limiting protection for the second controllable switch module 5, which is conducive to the safe and reliable discharge of charge on the decoupling capacitor Cap. It can be understood that the resistance value of the third resistor R3 is not specifically limited here, and can be selected according to the principle of ensuring the safe operation of the circuit.

[0072] In some embodiments, the second controllable switch module 5 includes a second controllable switch Q2 and a fourth resistor R4;

[0073] The control terminal of the second controllable switch Q2 is connected to one end of the fourth resistor R4, and the common terminal of the connection serves as the control terminal of the second controllable switch module 5. The first end of the second controllable switch Q2 serves as the first end of the second controllable switch module 5. The second end of the second controllable switch Q2 is connected to the other end of the fourth resistor R4, and the common terminal of the connection serves as the second end of the second controllable switch module 5.

[0074] Specifically, such as Figure 3 As shown, the second controllable switch Q2 can be an N-type MOSFET. The voltage divider between the second resistor R2 and the fourth resistor R4 can reliably enable the second controllable switch Q2 to conduct. It is understood that the resistance value of the fourth resistor R4 is not specifically limited here, and can be selected according to the principle of ensuring the safe operation of the circuit.

[0075] In some embodiments, the second controllable switch module 5 further includes a filter capacitor C1;

[0076] The filter capacitor C1 is connected in parallel with the fourth resistor R4.

[0077] Specifically, such as Figure 3 As shown, the filter capacitor C1 is used for filtering and anti-jitter, and there is no special limitation on the specific capacitance value of the filter capacitor C1.

[0078] In some embodiments, the second controllable switch module 5 further includes a first Zener diode DZ1 and a second Zener diode DZ2;

[0079] The anode of the first Zener diode DZ1 is connected to the control terminal of the second controllable switch Q2, the cathode of the first Zener diode DZ1 is connected to the cathode of the second Zener diode DZ2, and the anode of the second Zener diode DZ2 is connected to the second terminal of the second controllable switch Q2.

[0080] Specifically, considering that the output voltage of the power supply may fluctuate and become very large, in order to prevent the second controllable switch Q2 from being broken down by high voltage, the aforementioned first Zener diode DZ1 and second Zener diode DZ2 are also provided.

[0081] Please refer to Figure 4 , Figure 4This is a schematic diagram of the structure of an on-board control system provided by the present invention.

[0082] The present invention also provides an on-board control system, including a storage module 1, a main control module 2, a decoupling capacitor Cap and a voltage conversion module 3, and also includes a charge discharge circuit 6 as described above;

[0083] The power input terminal of the voltage conversion module 3 is connected to the first terminal of the power supply and charge discharge circuit 6, the control terminal is connected to the second terminal of the main control module 2 and the charge discharge circuit 6 respectively, the first power output terminal is connected to the power input terminal of the main control module 2, and the second power output terminal is connected to one end of the decoupling capacitor Cap, the third terminal of the charge discharge circuit 6 and the power input terminal of the storage module 1 respectively.

[0084] The other end of the decoupling capacitor Cap is grounded; the fourth end of the charge discharge circuit 6 is grounded.

[0085] For a description of the vehicle control system provided in this application, please refer to the above-described embodiment of the charge discharge circuit; it will not be repeated here.

[0086] It should be noted that, as Figure 4 As shown, in the charge discharge circuit 6, the first terminal of the first controllable switch module 4 is connected to the control terminal of the second controllable switch module 5, and the common terminal of the connection is the first terminal of the charge discharge circuit 6. The control terminal of the first controllable switch module 4 is the second terminal of the charge discharge circuit 6. The first terminal of the second controllable switch module 5 is the third terminal of the charge discharge circuit 6. The second terminal of the first controllable switch module 4 and the second terminal of the second controllable switch module 5 are connected to the common terminal of the connection, and the common terminal of the connection is the fourth terminal of the charge discharge circuit 6.

[0087] The present invention also provides a vehicle including the vehicle control system as described above.

[0088] For a description of the vehicle provided in this application, please refer to the above-described embodiment of the charge discharge circuit; further details will not be repeated here.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0090] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0091] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A charge discharge circuit, characterized in that, This invention is applied to an in-vehicle control system, which includes a storage module, a main control module, a decoupling capacitor, and a voltage conversion module. The voltage conversion module has its power input connected to a power source, its control terminal connected to the main control module, its first power output connected to the main control module's power input, and its second power output connected to one end of the decoupling capacitor and the power input of the storage module. The other end of the decoupling capacitor is grounded. The main control module drives the voltage conversion module to operate normally to maintain voltage output when the power source's output voltage is stable, and controls the voltage conversion module to stop outputting voltage when the output voltage fluctuates. The charge discharge circuit includes a first controllable switch module and a second controllable switch module; The control terminal of the first controllable switch module is connected to the control terminal of the voltage conversion module. The first terminal is connected to the power supply input terminal of the voltage conversion module and the control terminal of the second controllable switch module, respectively. The second terminal is grounded and is used to turn off when the main control module controls the voltage conversion module to stop outputting, and to turn on when the main control module drives the voltage conversion module to work normally. The first terminal of the second controllable switch module is connected to one end of the decoupling capacitor, and the second terminal is grounded, which is used to turn on when the first controllable switch module is turned off and turn off when the first controllable switch module is turned on.

2. The charge discharge circuit as described in claim 1, characterized in that, The first controllable switch module includes a first controllable switch and a first resistor; The first end of the first controllable switch serves as the first end of the first controllable switch module. The second end of the first controllable switch is connected to one end of the first resistor, and the common terminal of the connection serves as the second end of the first controllable switch module. The control end of the first controllable switch is connected to the other end of the first resistor, and the common terminal of the connection serves as the control end of the first controllable switch module.

3. The charge discharge circuit as described in claim 2, characterized in that, The main control module includes an enable control module and a data processing module; the voltage conversion module includes a first conversion submodule and a second conversion submodule. The power input terminal of the first conversion submodule is connected to the power supply, and the power output terminal is connected to the power input terminal of the enable control module. It is used to perform voltage conversion when it receives a wake-up prompt signal through its own wake-up input terminal, so as to supply power to the enable control module and enable the enable control module to switch from sleep mode to normal working mode. The power input terminal of the second conversion submodule is connected to the power supply and the first terminal of the first controllable switch module, respectively. The first power output terminal is connected to the data processing module, and the second power output terminal is connected to one end of the decoupling capacitor and the power input terminal of the storage module, respectively. The control terminal is connected to the control terminal of the enable control module and the first controllable switch module, respectively, and is used to perform voltage conversion according to the enable signal sent by the enable control module after it switches to the normal working mode and when the output voltage of the power supply does not fluctuate, so as to supply power to the data processing module and the storage module; and to stop voltage conversion according to the stop signal sent by the enable control module after it switches to the normal working mode and when the output voltage fluctuates, or when the enable signal is not received. The second controllable switch module is also used to turn on when the first conversion submodule does not receive the wake-up prompt signal and the output voltage of the power supply is greater than its own turn-on voltage; The first controllable switch module is also used to turn off when the enabling control module is in the sleep mode.

4. The charge discharge circuit as described in claim 1, characterized in that, The charge discharge circuit also includes a second resistor; One end of the second resistor is connected to the power supply input terminal of the voltage conversion module, and the other end of the second resistor is connected to the control terminal of the second controllable switch module and the first terminal of the first controllable switch module.

5. The charge discharge circuit as described in claim 1, characterized in that, The charge discharge circuit also includes a third resistor; One end of the third resistor is connected to one end of the decoupling capacitor, and the other end of the third resistor is connected to the first end of the second controllable switch module.

6. The charge discharge circuit as described in any one of claims 1 to 5, characterized in that, The second controllable switch module includes a second controllable switch and a fourth resistor; The control terminal of the second controllable switch is connected to one end of the fourth resistor, and the common terminal of the connection is used as the control terminal of the second controllable switch module. The first end of the second controllable switch is used as the first end of the second controllable switch module. The second end of the second controllable switch is connected to the other end of the fourth resistor, and the common terminal of the connection is used as the second end of the second controllable switch module.

7. The charge discharge circuit as described in claim 6, characterized in that, The second controllable switch module also includes a filter capacitor; The filter capacitor is connected in parallel with the fourth resistor.

8. The charge discharge circuit as described in claim 6, characterized in that, The second controllable switch module also includes a first Zener diode and a second Zener diode; The anode of the first Zener diode is connected to the control terminal of the second controllable switch, the cathode of the first Zener diode is connected to the cathode of the second Zener diode, and the anode of the second Zener diode is connected to the second terminal of the second controllable switch.

9. A vehicle-mounted control system, characterized in that, It includes a storage module, a main control module, a decoupling capacitor and a voltage conversion module, and also includes a charge discharge circuit as described in any one of claims 1 to 8; The power supply input terminal of the voltage conversion module is connected to the power supply and the first terminal of the charge discharge circuit. The control terminal is connected to the second terminal of the main control module and the charge discharge circuit. The first power supply output terminal is connected to the power supply input terminal of the main control module. The second power supply output terminal is connected to one end of the decoupling capacitor, the third terminal of the charge discharge circuit, and the power supply input terminal of the storage module. The other end of the decoupling capacitor is grounded; the fourth end of the charge discharge circuit is grounded.

10. A vehicle, characterized in that, Including the vehicle control system as described in claim 9.

Images