Emergency power supply circuit and vehicle

Abstract

The utility model discloses an emergency power supply circuit and a vehicle. The emergency power supply circuit is used for the vehicle, the vehicle comprises a power supply module and an authentication unlocking module, the emergency power supply circuit comprises a detection control module, a first turn-off module, a second turn-off module and a turn-off control module, and the authentication unlocking module is connected with the power supply module and an external standby power supply through the first turn-off module and the second turn-off module respectively; the detection control module is used for controlling the first turn-off module to be turned off under the condition that the voltage of the power supply module is detected to be smaller than a first preset threshold value; and the turn-off control module is used for controlling the second turn-off module to be turned off under the condition that the voltage of the power supply module is greater than a second preset threshold value. In the emergency power supply circuit, only the power supply module supplies power to the authentication unlocking module under the condition that the power supply module of the vehicle is normal, and only the external standby power supply supplies power to the authentication unlocking module under the condition that the power is insufficient, so that the authentication unlocking module can realize an unlocking function to open a front cabin cover lock of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of automotive technology, and in particular to an emergency power supply circuit for a vehicle and a vehicle. Background Art

[0002] Currently, electric vehicles can fail to unlock and start due to low battery life in certain situations. Jump-charging the battery is required to reactivate the vehicle. Before jumping, the vehicle must be unlocked to open the front hood. Safely and conveniently opening the front hood is crucial to improving the user experience. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application needs to provide an emergency power supply circuit for a vehicle and a vehicle.

[0004] The emergency power supply circuit of the embodiment of the present application is used in a vehicle, the vehicle including a power module and an authentication unlocking module, the authentication unlocking module being used to unlock the vehicle, the emergency power supply circuit including a detection control module, a first shutdown module, a second shutdown module and a shutdown control module, the authentication unlocking module being connected to the power module via the first shutdown module, and being connected to an external backup power supply via the second shutdown module;

[0005] The detection control module is connected to the power module and the first shutdown module respectively, and is used to control the first shutdown module to shut down so as to disconnect the authentication and unlocking module from the power module when detecting that the voltage of the power module is less than a first preset threshold;

[0006] The shutdown control module is connected to the power supply module and the second shutdown module respectively, and is used to control the second shutdown module to shut down to disconnect the authentication unlocking module from the external backup power supply when the voltage of the power supply module is greater than a second preset threshold.

[0007] In some embodiments, the power supply module includes a direct power supply and a DC conversion power supply, the first shutdown module includes a first switch and a second switch, and the authentication and unlocking module is connected to the direct power supply through the first switch and connected to the DC conversion power supply through the second switch;

[0008] The detection control module is also used to control the first switch to turn off to disconnect the authentication unlocking module from the direct power supply when it is detected that the voltage of the direct power supply is less than a first preset threshold; or to control the second switch to turn off to disconnect the authentication unlocking module from the DC conversion power supply when it is detected that the voltage of the DC conversion power supply is less than a first preset threshold.

[0009] In some embodiments, the first switch and the second switch are relay switches or field effect transistors.

[0010] In some embodiments, the second shutdown module includes a switching transistor, a first electrode of the switching transistor can be connected to the external backup power supply, a second electrode of the switching transistor is connected to the authentication unlocking module, and a control electrode of the switching transistor is connected to the shutdown control module.

[0011] In some embodiments, the emergency power supply circuit further includes a first diode, wherein the anode of the first diode can be connected to the external backup power supply, and the cathode of the first diode is connected to the first electrode of the switching transistor.

[0012] In certain embodiments, the shutdown control module includes a voltage stabilizing unit, a first transistor, a second transistor, a first load resistor, and a second load resistor;

[0013] The first electrode of the first transistor is connected to the cathode of the first diode through the first load, the second electrode of the first transistor is connected to the ground end, and the control electrode of the first transistor is connected to the power module through the voltage stabilizing unit;

[0014] The first electrode of the second transistor is connected to the cathode of the first diode through the second load, the second electrode of the second transistor is connected to the ground end, and the control electrode of the second transistor is connected to the cathode of the first diode through the first load.

[0015] In certain embodiments, the power supply module includes a direct power supply and a DC conversion power supply, and the shutdown control module further includes a second diode and a third diode;

[0016] The anode of the second diode is connected to the direct power supply, and the cathode of the second diode is connected to the voltage stabilizing unit;

[0017] The anode of the third diode is connected to the DC conversion power supply, and the cathode of the third diode is connected to the voltage stabilizing unit.

[0018] In some embodiments, the voltage stabilizing unit includes a voltage stabilizing diode and a voltage stabilizing resistor connected in series.

[0019] In some embodiments, the switch transistor is a P-type MOS transistor.

[0020] An embodiment of the present application further provides a vehicle, comprising an emergency power supply circuit implementing any one of the above embodiments.

[0021] In the emergency power supply circuit and vehicle according to the embodiments of the present application, the power module and the first shutdown module are connected via a detection control module, and the power module and the second shutdown module are connected via a shutdown control module. When the detection control module detects that the voltage of the power module is less than a first preset threshold, the first shutdown module is controlled to shut down, thereby disconnecting the authentication unlocking module from the power module. When the power module is out of power, the external backup power supply can supply power to the authentication unlocking module via the second shutdown module, ensuring that the authentication unlocking module can operate normally and realize the vehicle unlocking function, thereby facilitating opening the vehicle's hood lock. In addition, because the external backup power supply supplies power to the authentication unlocking module only via the second shutdown module, the required current of the external backup power supply can be relatively small, thereby reducing the requirements for the external backup power supply. When the shutdown control module detects that the voltage of the power module is greater than a second preset threshold, the second shutdown module is controlled to shut down, thereby disconnecting the authentication unlocking module from the external backup power supply. When the power module is operating normally, the authentication unlocking module can be prevented from abnormally connecting to the external backup power supply, thereby ensuring the safety of the vehicle.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the modules of a vehicle in an embodiment of the present application;

[0025] Figure 2 This is a circuit diagram of a vehicle in an embodiment of the present application.

[0026] Main components reference numbers:

[0027] Vehicle 1000, emergency power supply circuit 100, power supply module 10, direct power supply 11, DC conversion power supply 12, authentication and unlocking module 20, detection and control module 30, first shutdown module 40, second shutdown module 50, shutdown control module 60, voltage stabilizing unit 61, external backup power supply 70. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0032] See also Figure 1The present application discloses a vehicle 1000, which includes an emergency power supply circuit 100, a power module 10, and an authentication unlocking module 20. The emergency power supply circuit 100 includes a detection control module 30, a first shutdown module 40, a second shutdown module 50, and a shutdown control module 60. The authentication unlocking module 20 is connected to the power module 10 through the first shutdown module 40, and is connected to the external backup power supply 70 through the second shutdown module 50. The detection control module 30 is connected to the power module 10 and the first shutdown module 40 respectively, and is configured to control the first shutdown module 40 to shut down and disconnect the authentication unlocking module 20 from the power module 10 when it detects that the voltage of the power module 10 is less than a first preset threshold. The shutdown control module 60 is connected to the power module 10 and the second shutdown module 50 respectively, and is configured to control the second shutdown module 50 to shut down and disconnect the authentication unlocking module 20 from the external backup power supply 70 when the voltage of the power module 10 is greater than a second preset threshold.

[0033] In the vehicle 1000 and the emergency power supply circuit 100 of the embodiment of the present application, the power module 10 and the first shutdown module 40 are connected through the detection control module 30, and the power module 10 and the second shutdown module 50 are connected through the shutdown control module 60. When the detection control module 30 detects that the voltage of the power module 10 is less than the first preset threshold, it controls the first shutdown module 40 to shut down, thereby disconnecting the authentication unlocking module 20 from the power module 10, so that when the power module 10 is out of power, the external backup power supply 70 can supply power to the authentication unlocking module 20 through the second shutdown module 50, ensuring that the authentication unlocking module 20 can work normally and realize the unlocking function of the vehicle 1000, so that the user can open the front hood lock of the vehicle 1000 to power the power module 10.

[0034] The power module 10 may include but is not limited to the auxiliary battery and power battery of the vehicle 1000. The auxiliary battery does not directly participate in the driving process of the vehicle 1000, but provides necessary power support for the various electrical components and systems of the vehicle 1000. Its main function is to provide power for the electrical system of the vehicle 1000, including starting the vehicle 1000, powering on-board equipment such as audio, air conditioning, lighting, etc., and serving as an emergency power supply when the power battery is exhausted or cannot be used.

[0035] The authentication unlocking module 20 can realize the unlocking function of the vehicle 1000. The authentication unlocking module 20 verifies the user's identity by collecting the user's biometric information or requiring the user to enter a password, and comparing it with the user's pre-registered information. The authentication unlocking module 20 includes a variety of authentication methods, such as fingerprint recognition, face recognition, iris recognition, password authentication, etc., to adapt to different scenarios and needs. After the authentication is passed, the authentication unlocking module 20 can unlock the door, front hood, trunk and start the engine. The authentication unlocking module 20 can be connected to the power module 10 or the external backup power supply 70 through the emergency power supply circuit 100, so that the power module 10 or the external backup power supply 70 can power the authentication unlocking module 20.

[0036] The detection control module 30 is responsible for monitoring the voltage status of the power module 10 and controlling the on and off of the first shutdown module 40 according to preset conditions. The detection control module 30 includes a microcontroller unit (MCU) and a voltage detection device. The voltage detection device is used to monitor the voltage value of the power module in real time and convert the detected voltage signal into an electrical signal that can be recognized by the MCU. One or more voltage thresholds, namely the first prediction threshold, are preset in the MCU to determine whether the voltage status of the power module meets the normal working requirements. When the voltage is lower than the first preset threshold, the first shutdown module 40 is controlled to shut down to disconnect the authentication unlocking module 20 from the power module 10.

[0037] The first shutdown module 40 primarily functions as a switch, controlled by the detection control module 30, responsible for connecting and disconnecting the power module 10 and the authentication and unlocking module 20. The second shutdown module 50 primarily functions as a switch, controlled by the shutdown control module 60, responsible for connecting and disconnecting the external backup power supply 70 and the authentication and unlocking module 20.

[0038] The shutdown control module 60, which includes multiple diodes, transistors, and load resistors, also monitors the voltage status of the power module 10. It has one or more preset voltage thresholds, known as second prediction thresholds, to determine whether the voltage status of the power module meets normal operating requirements. If the voltage of the power module 10 exceeds the second preset threshold, the second shutdown module 50 is controlled to shut down, disconnecting the authentication and unlocking module 20 from the external backup power supply 70.

[0039] In addition, since the external backup power supply 70 only supplies power to the authentication and unlocking module 20 through the second shutdown module 50, the required current of the external backup power supply 70 can be smaller, reducing the requirements of the external backup power supply 70. When the shutdown control module 60 detects that the voltage of the power module 10 is greater than the second preset threshold, it controls the second shutdown module 50 to shut down, thereby disconnecting the connection between the authentication and unlocking module 20 and the external backup power supply 70, so that under normal circumstances, the power module 10 can prevent the authentication and unlocking module 20 from abnormally connecting to the external backup power supply 70, thereby ensuring the safety of the vehicle 1000.

[0040] It should be noted that the external backup power supply 70 refers to a backup power supply connected from outside the vehicle 1000. It is understood that when the power module 10 of the vehicle 1000 is low on power, it cannot power the vehicle 1000's power system, causing the vehicle 1000 to be locked. Therefore, it is necessary to connect the external backup power supply 70 to the power system to ensure normal operation of the power system. The vehicle 1000 may have a reserved interface through which the external backup power supply 70 can be connected to the emergency power supply circuit 100.

[0041] Specifically, in one embodiment, the voltage of the power module 10 of vehicle 1000 is 9 volts, and both the first and second preset thresholds are 10 volts. The detection and control module 30 detects that the voltage of the power module 10 is below the first preset threshold, determines that the power module 10 is low on power and cannot function properly, and sends a signal to the first shutdown module 40, causing it to shut down and disconnect the authentication and unlocking module 20 from the power module 10. Conversely, the shutdown control module 60 detects that the voltage of the power module 10 is below the second preset threshold and sends a signal to the second shutdown module 50, causing it to turn on and complete the connection between the authentication and unlocking module 20 and the external backup power supply 70. This switches the entire emergency power supply circuit 100 to the external backup power supply 70. The authentication and unlocking module 20 then operates normally, and after authentication is complete, the user can unlock the hood of the vehicle 1000 to recharge the low-power power module 10.

[0042] See also Figure 2In some embodiments, the power supply module 10 includes a direct power supply 11 and a DC conversion power supply 12. The first shutdown module 40 includes a first switch K1 and a second switch K2. The authentication and unlocking module 20 is connected to the direct power supply 11 via the first switch K1 and to the DC conversion power supply 12 via the second switch K2. The detection and control module 30 is further configured to control the first switch K1 to be turned off to disconnect the authentication and unlocking module 20 from the direct power supply upon detecting that the voltage of the direct power supply 11 is less than a first preset threshold; or to control the second switch K2 to be turned off to disconnect the authentication and unlocking module 20 from the DC conversion power supply 12 upon detecting that the voltage of the DC conversion power supply 12 is less than a first preset threshold.

[0043] The power module 10 includes a direct current power supply 11 and a DC converter power supply 12. The direct current power supply 11 is a small battery power source that serves as an auxiliary power source for electric vehicles. It is primarily used to provide power to key electronic components in the vehicle 1000 when the vehicle's main power source (such as the power battery) is inactive or malfunctions, ensuring the normal operation of the vehicle's basic functions. The direct current power supply 11 has a relatively small capacity and power, but is sufficient to meet the basic power needs of the vehicle 1000 when not in motion. The voltage of the direct current power supply 11 is typically low, at 13 volts, but can drop below 10 volts under abnormal conditions. The DC converter power supply 12 is a DCDC (Direct Current-Direct Current) power supply, serving as the main power conversion device. Using efficient power conversion technology, the DCDC power supply converts the high-voltage DC power output from the power battery into the low-voltage DC power required by various low-voltage electronic devices in the vehicle 1000, such as lighting, audio, and air conditioning. The two work together to ensure a stable and reliable power supply for the vehicle 1000 under various operating conditions.

[0044] The authentication unlocking module 20 is connected to the power module 10 through the first shutdown module 40. Specifically, the first shutdown module 40 includes a first switch K1 and a second switch K2. The authentication unlocking module 20 is connected to the direct power supply 11 and the DC conversion power supply 12 through the first switch K1 and the second switch K2, respectively.

[0045] The emergency power supply circuit 100 is connected to the power supply module 10 and the first shutdown module 40 respectively through the detection control module 30, monitors the voltage of the direct power supply 11 and the DC conversion power supply 12, and controls the on and off of the first switch K1 and the second switch K2 according to the voltage conditions.

[0046] Specifically, when the detection control module 30 detects that the voltage of the direct power supply 11 is less than a first preset threshold, it controls the first switch K1 to turn off, disconnecting the authentication and unlocking module 20 from the direct power supply 11. At this time, if the voltage of the DC conversion power supply 12 is still high enough, the authentication and unlocking module 20 will only draw power from the DC conversion power supply 12.

[0047] When the detection control module 30 detects that the voltage of the DC conversion power supply 12 is less than a first preset threshold, it controls the second switch K2 to turn off, disconnecting the authentication and unlocking module 20 from the DC conversion power supply 12. If the voltage of the direct power supply 11 is still high enough, the authentication and unlocking module 20 will only draw power from the direct power supply 11.

[0048] When the voltages of the direct power supply 11 and the DC conversion power supply 12 are both greater than or equal to a first preset threshold, both switches remain closed, and the authentication and unlocking module 20 can obtain power from either or both power sources. If the voltages of both power sources are lower than the first preset threshold, both switches are turned off, and the authentication and unlocking module 20 loses power.

[0049] This design improves system security and reliability. By monitoring the power supply voltage and disconnecting it when necessary, it prevents the authentication and unlocking module 20 from being damaged by unstable or low voltage. Furthermore, this design allows the system to continue operating during certain power failures, thereby improving overall system availability and fault tolerance.

[0050] In some embodiments, the first switch K1 and the second switch K2 are relay switches or field effect transistors.

[0051] For example, in some examples, the first switch K1 and the second switch K2 are both relay switches; in some examples, the first switch K1 and the second switch K2 are both field effect transistors; in some examples, the first switch K1 is a relay switch and the second switch K2 is a field effect transistor; in some examples, the first switch K1 is a field effect transistor and the second switch K2 is a relay switch.

[0052] Relay switches and field-effect transistors operate on different principles. Relay switches control the opening and closing of a mechanical switch by generating a magnetic field through a switching coil, thereby controlling the circuit. Field-effect transistors utilize semiconductor materials and apply positive and negative bias voltages to the gate to control the on / off state between the drain and source. This results in higher switching speeds and lower power consumption.

[0053] Field-effect transistors (FETs) offer advantages in applications requiring high speed, high frequency, low power consumption, and a long service life. Relay switches, on the other hand, have a large load capacity, can control high-power loads, and have relatively strong overload resistance. In applications requiring high voltage and high current, relays may be a more suitable choice.

[0054] See also Figure 2 In some embodiments, the second shutdown module 50 includes a switching transistor Q3, a first electrode of the switching transistor Q3 can be connected to an external backup power supply 70, a second electrode of the switching transistor Q3 is connected to the authentication unlocking module 20, and a control electrode of the switching transistor Q3 is connected to the shutdown control module 60.

[0055] In this embodiment, the switching transistor Q3 used in the second shutdown module 50 is a P-type MOS transistor. The conductive channel of a P-type MOS transistor is formed from P-type semiconductor material. When the gate voltage is lower than a certain threshold of the source voltage, the channel begins to conduct. A P-type MOS transistor can be used as a switch to control the on and off of a circuit. When the gate voltage is sufficiently low, the switching transistor Q3 is turned on; when the gate voltage is increased to a level close to or exceeding the source voltage, the switching transistor Q3 is turned off.

[0056] Switching transistor Q3 is connected to shutdown control module 60, and authentication and unlocking module 20 is connected to external backup power supply 70 via switching transistor Q3 and shutdown control module 60. This connection primarily allows for the shutdown control module 60 to control switching transistor Q3 to conduct when both the direct power supply 11 and the DC conversion power supply 12 of power module 10 are depleted. External backup power supply 70 can then access authentication and unlocking module 20 through switching transistor Q3, providing power to the authentication and unlocking module 20 and ensuring its proper function, enabling vehicle 1000 unlocking. This allows the user to unlock the hood of vehicle 1000 and power up power module 10. Furthermore, when both the direct power supply 11 and the DC conversion power supply 12 of power module 10 are functioning properly, shutdown control module 60 controls switching transistor Q3 to turn off, disconnecting authentication and unlocking module 20 from external backup power supply 70. This prevents authentication and unlocking module 20 from erroneously connecting to external backup power supply 70 when power module 10 is functioning normally, thus ensuring the safety of vehicle 1000.

[0057] See also Figure 2 In some embodiments, the emergency power supply circuit 100 further includes a first diode D1 , the anode of the first diode D1 can be connected to the external backup power supply 70 , and the cathode of the first diode D1 is connected to the first electrode of the switching transistor Q3 .

[0058] It should be noted that a diode is a semiconductor device with a special conductive property. The diode only allows current to flow from the positive electrode to the negative electrode, and blocks the reverse direction. This property is widely used in circuits, especially in situations where reverse current flow is required.

[0059] In the emergency power supply circuit 100 , the anode of the first diode D1 is connected to the external backup power supply 70 , and the cathode is connected to the first electrode of the switching transistor Q3 , which can prevent the wiring from being connected in the wrong direction and improve the reliability and safety of the emergency power supply circuit 100 .

[0060] Specifically, for example, when the positive and negative poles of the external backup power supply 70 are connected in reverse, due to the unidirectional conductivity of the first diode D1 , current cannot flow through the first diode D1 , thereby protecting subsequent circuits from damage.

[0061] See also Figure 2 In some embodiments, the shutdown control module 60 includes a voltage stabilizing unit 61, a first transistor Q1, a second transistor Q2, a first load resistor R1, and a second load resistor R2. A first electrode of the first transistor Q1 is connected to the cathode of the first diode D1 via a first load, a second electrode of the first transistor Q1 is connected to the ground terminal GND1, and a control electrode of the first transistor Q1 is connected to the power module 10 via the voltage stabilizing unit 61. A first electrode of the second transistor Q2 is connected to the cathode of the first diode D1 via a second load, a second electrode of the second transistor Q2 is connected to the ground terminal GND2, and a control electrode of the second transistor Q2 is connected to the cathode of the first diode D1 via the first load.

[0062] The voltage stabilizing unit 61 is used to connect the first transistor Q1 and the power module 10 , and mainly plays a voltage stabilizing role to prevent the voltage or current output by the power module 10 to the first transistor Q1 from being too large, thereby damaging the emergency power supply circuit 100 .

[0063] The first electrode of the first transistor Q1 and the control electrode of the second transistor Q2 are connected to the external backup power supply 70 through the first diode D1, the second electrode of the first transistor Q1 is connected to the ground terminal GND1, and the control electrode of the first transistor Q1 is connected to the power module 10. In this way, when the power module 10 is normally powered, the first electrode and the second electrode of the first transistor Q1 are turned on. Since the second electrode is grounded, the potential is zero. The control electrode of the second transistor Q2 has the same potential as the first electrode of the first transistor Q1 and is also zero. The second transistor Q2 is turned off, so that the switching transistor Q3 of the second shutdown module 50 connected to the second transistor Q2 is turned off, and the connection between the authentication and unlocking module 20 and the external backup power supply 70 is disconnected.

[0064] In this way, when the power module 10 is normal, the shutdown control module 60 can prevent the authentication and unlocking module 20 from abnormally connecting to the external backup power supply 70 by controlling the second shutdown module 50, thereby ensuring the safety of the vehicle 1000.

[0065] See also Figure 2 In some embodiments, the power module 10 includes a direct power supply 11 and a DC conversion power supply 12, and the shutdown control module 60 further includes a second diode D2 and a third diode D3. The anode of the second diode D2 is connected to the direct power supply 11, and the cathode of the second diode D2 is connected to the voltage stabilizing unit 61. The anode of the third diode D3 is connected to the DC conversion power supply 12, and the cathode of the third diode D3 is connected to the voltage stabilizing unit 61.

[0066] The anode of the second diode D2 is connected to the direct power supply 11, and the cathode is connected to the voltage stabilizing unit 61. The second diode D2 acts as a unidirectional conductor, allowing the voltage of the direct power supply 11 to pass through the diode and enter the voltage stabilizing unit 61 in the forward direction. Due to the unidirectional conductivity of the diode, if the polarity of the direct power supply 11 is reversed, current cannot flow through the diode, thereby protecting the voltage stabilizing unit 61 and subsequent circuits from damage caused by reverse voltage.

[0067] The anode of the third diode D3 is connected to the DC power supply 12, and the cathode is also connected to the voltage stabilizing unit 61. The third diode D3 also provides unidirectional conduction, but specifically for the DC power supply 12. The third diode D3 allows the voltage of the DC power supply 12 to pass through the diode and into the voltage stabilizing unit 61 in the forward direction, while also preventing damage that could occur if the DC power supply 12 is connected with reverse polarity.

[0068] Thus, the second diode D2 and the third diode D3 in the shutdown control module 60 prevent reverse polarity of the power supply and protect subsequent circuits, while the voltage stabilization unit 61 is responsible for stabilizing the power supply voltage at a predetermined level. These three components work together to provide stable and reliable power support for the electric vehicle system.

[0069] See also Figure 2 In some embodiments, the voltage stabilizing unit 61 includes a voltage stabilizing diode Z1 and a voltage stabilizing resistor R3 connected in series.

[0070] Specifically, the Zener diode Z1, also known as a Zener diode, is a semiconductor device with unique reverse breakdown characteristics. Unlike ordinary diodes, after reverse breakdown, the current flowing through the Zener diode Z1 can vary over a wide range, while the voltage across it remains essentially constant. The Zener resistor R3 acts as a current limiter, protecting the Zener diode Z1 and other components from damage due to excessive current. In the voltage stabilization unit 61, the Zener resistor R3 works in conjunction with the Zener diode Z1 to achieve voltage stability.

[0071] The vehicle 1000 of the embodiment of the present application includes an emergency power supply circuit 100 that implements any of the above embodiments. The structure of the emergency power supply circuit 100 is as described above and will not be repeated here.

[0072] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An emergency power supply circuit for a vehicle, characterized in that: The vehicle includes a power module and an authentication and unlocking module, the authentication and unlocking module is used to unlock the vehicle, the emergency power supply circuit includes a detection and control module, a first shutdown module, a second shutdown module and a shutdown control module, the authentication and unlocking module is connected to the power module through the first shutdown module, and is connected to an external backup power supply through the second shutdown module; The detection control module is connected to the power module and the first shutdown module respectively, and is used to control the first shutdown module to shut down so as to disconnect the authentication and unlocking module from the power module when detecting that the voltage of the power module is less than a first preset threshold; The shutdown control module is connected to the power supply module and the second shutdown module respectively, and is used to control the second shutdown module to shut down to disconnect the authentication unlocking module from the external backup power supply when the voltage of the power supply module is greater than a second preset threshold.

2. The emergency power supply circuit according to claim 1, characterized in that: The power supply module includes a direct power supply and a DC conversion power supply, the first shutdown module includes a first switch and a second switch, the authentication and unlocking module is connected to the direct power supply through the first switch, and is connected to the DC conversion power supply through the second switch; The detection control module is also used to control the first switch to turn off to disconnect the authentication unlocking module from the direct power supply when it is detected that the voltage of the direct power supply is less than a first preset threshold; or to control the second switch to turn off to disconnect the authentication unlocking module from the DC conversion power supply when it is detected that the voltage of the DC conversion power supply is less than a first preset threshold.

3. The emergency power supply circuit according to claim 2, characterized in that: The first switch and the second switch are relay switches or field effect transistors.

4. The emergency power supply circuit according to claim 1, characterized in that: The second shutdown module includes a switching transistor, a first electrode of the switching transistor can be connected to the external backup power supply, a second electrode of the switching transistor is connected to the authentication and unlocking module, and a control electrode of the switching transistor is connected to the shutdown control module.

5. The emergency power supply circuit according to claim 4, characterized in that: The emergency power supply circuit further includes a first diode, the anode of the first diode being connectable to the external backup power supply, and the cathode of the first diode being connected to the first electrode of the switching transistor.

6. The emergency power supply circuit according to claim 5, characterized in that: The shutdown control module includes a voltage stabilizing unit, a first transistor, a second transistor, a first load resistor and a second load resistor; The first electrode of the first transistor is connected to the cathode of the first diode through the first load, the second electrode of the first transistor is connected to the ground end, and the control electrode of the first transistor is connected to the power module through the voltage stabilizing unit; The first electrode of the second transistor is connected to the cathode of the first diode through the second load, the second electrode of the second transistor is connected to the ground end, and the control electrode of the second transistor is connected to the cathode of the first diode through the first load.

7. The emergency power supply circuit according to claim 6, characterized in that: The power supply module includes a direct power supply and a DC conversion power supply, and the shutdown control module also includes a second diode and a third diode; The anode of the second diode is connected to the direct power supply, and the cathode of the second diode is connected to the voltage stabilizing unit; The anode of the third diode is connected to the DC conversion power supply, and the cathode of the third diode is connected to the voltage stabilizing unit.

8. The emergency power supply circuit according to claim 6, characterized in that: The voltage stabilizing unit includes a voltage stabilizing diode and a voltage stabilizing resistor connected in series.

9. The emergency power supply circuit according to claim 4, characterized in that: The switch transistor is a P-type MOS tube.

10. A vehicle, characterized in that: The method comprises the emergency power supply circuit as described in any one of claims 1 to 9.

Images