Vehicle collision safety control circuit, vehicle control system and vehicle

Abstract

The utility model discloses a vehicle collision safety control circuit, a vehicle control system and a vehicle. A collision detection circuit generates two paths of collision detection signals when the vehicle is collided, and the two paths of collision detection signals are sent to a high-voltage driving circuit and a battery management circuit respectively; the high-voltage driving circuit directly generates a corresponding driving control signal according to the collision detection signal to control the high-voltage switching circuit to be switched off, the high-voltage power-off time after collision is saved, the other collision detection signal is sent to the battery management circuit, the battery management circuit generates a driving control signal according to the collision detection signal, and the battery management circuit is powered off. Therefore, redundant control signals are provided for the high-voltage switch circuit, even if one signal fails, the high-voltage switch circuit can be controlled to be switched off in time according to the other signal, and the safety and reliability of the whole vehicle after collision are improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle collision safety control circuit, a vehicle control system, and a vehicle. Background Art

[0002] The high-voltage relay inside the vehicle is connected in series to the vehicle's high-voltage electrical circuit. It controls the on / off state of the high-voltage circuit and is powered by a power battery or storage battery. To ensure vehicle safety in the event of a malfunction, a collision switch is typically installed inside the vehicle to disconnect it in the event of a rear-end collision.

[0003] However, in the related art, the signal after the collision needs to be transmitted from the collision sensor to the airbag controller first, and the airbag controller sends a signal to the battery management module. The battery management module judges and processes it and outputs the corresponding control drive signal to turn off the high-voltage relay. There are problems such as long transmission time and inability to shut down quickly. Utility Model Content

[0004] In view of the above problems, the present application provides a vehicle collision safety control circuit, a vehicle control system and a vehicle, aiming to solve the problems of long transmission time and inability to quickly shut down the collision signal in the relevant vehicle.

[0005] In a first aspect, an embodiment of the present application provides a vehicle collision safety control circuit, the vehicle collision safety control circuit being used to control the switching state of a high-voltage switch circuit, the high-voltage switch circuit being connected in series with a power battery pack, the vehicle collision safety control circuit comprising: a high-voltage drive circuit, a battery management circuit, and a collision detection circuit;

[0006] The collision detection circuit is used to generate a collision detection signal in the event of a vehicle collision;

[0007] The battery management circuit is connected to the collision detection circuit, and the battery management circuit is used to collect the collision detection signal and generate a corresponding drive control signal according to the collision detection signal;

[0008] The high-voltage drive circuit is connected to the battery management circuit, the collision detection circuit and the high-voltage switch circuit. The high-voltage drive circuit is used to generate a corresponding high-voltage drive signal according to the collision detection signal and the drive control signal to control the switching state of the high-voltage switch circuit.

[0009] In the technical solution of the embodiment of the present application, the collision detection circuit can be set at the corresponding position of the vehicle. When the vehicle collides, the collision detection circuit generates two collision detection signals and sends them to the high-voltage drive circuit and the battery management circuit respectively. The high-voltage drive circuit directly generates a corresponding drive control signal according to the collision detection signal to control the high-voltage switch circuit to shut down, saving the high-voltage power-off time after the collision. In addition, the other collision detection signal is sent to the battery management circuit, and the battery management circuit generates a drive control signal according to the collision detection signal, thereby providing redundant control signals for the high-voltage switch circuit. Even if one of the signals fails, the high-voltage switch circuit can be controlled to shut down in time according to the other signal, thereby increasing the safety and reliability of the entire vehicle after a collision.

[0010] In some embodiments, the collision detection circuit includes: a collision sensor and an airbag controller;

[0011] The collision sensor generates a collision sensing signal when the vehicle collides;

[0012] The airbag controller is connected to the collision sensor, the battery management circuit and the high-voltage drive circuit, and is used to generate two collision detection signals according to the collision sensing signal and send them to the battery management circuit and the high-voltage drive circuit respectively.

[0013] In the technical solution of the embodiment of the present application, the collision sensor can be set at the corresponding position of the vehicle. When the vehicle collides, the collision sensor generates a corresponding collision sensing signal and sends it to the airbag sensor. The airbag sensor generates two collision detection signals and sends them to the high-voltage drive circuit and the battery management circuit respectively. The high-voltage drive circuit directly generates a corresponding drive control signal according to the collision detection signal to control the high-voltage switch circuit to shut down, saving the high-voltage power-off time after the collision. In addition, the other collision detection signal is sent to the battery management circuit, and the battery management circuit generates a drive control signal according to the collision detection signal, thereby providing redundant control signals for the high-voltage switch circuit. Even if one of the signals fails, the high-voltage switch circuit can be controlled to shut down in time according to the other signal, thereby increasing the safety and reliability of the entire vehicle after a collision.

[0014] In some embodiments, the high-voltage switching circuit includes: a high-voltage relay, wherein the two ends of the coil of the high-voltage relay are respectively connected to the high-voltage drive circuit and the ground wire, and the two ends of the contact group of the high-voltage relay are respectively connected to the positive electrode of the power battery pack and the high-voltage output positive electrode.

[0015] In the technical solution of the embodiment of the present application, the coil of the high-voltage relay is connected to a high-voltage drive circuit, which controls the power-on and power-off of the high-voltage relay coil, thereby controlling the conduction and shutdown of the high-voltage relay. When a vehicle crashes, the collision sensor generates a corresponding collision sensing signal and transmits it to the airbag sensor. The airbag sensor generates two collision detection signals, which are respectively transmitted to the high-voltage drive circuit and the battery management circuit. The high-voltage drive circuit directly generates a corresponding drive control signal based on the collision detection signal to control the high-voltage switch circuit to shut down, thus saving the time required to shut down the high-voltage power supply after the collision. Furthermore, another collision detection signal is transmitted to the battery management circuit, which generates a drive control signal based on the collision detection signal. This provides redundant control signals for the high-voltage switch circuit. Even if one signal fails, the high-voltage switch circuit can be promptly shut down based on the other signal, thereby improving the safety and reliability of the entire vehicle after a collision.

[0016] In some embodiments, the high-voltage drive circuit includes an OR gate and a high-voltage driver, the two output pins of the OR gate are respectively connected to the collision detection circuit and the battery management circuit, the output pin of the OR gate is connected to the high-voltage driver, and the high-voltage driver generates a corresponding high-voltage drive signal according to the output level of the OR gate.

[0017] In the technical solution of the embodiment of the present application, the input collision detection signal and the drive control signal are logically processed by an OR gate. When any one of the collision detection signal and the drive control signal is at a high level, the high-voltage drive circuit can output a corresponding high-voltage drive signal to control the high-voltage switch circuit to shut down. If one of the two signals fails, the other signal can also control the high-voltage relay to shut down. At the same time, through the redundant control of the two signals, the high-voltage relay is ensured to be shut down after the collision, thereby increasing the reliability and safety of the entire vehicle.

[0018] In some embodiments, the high-voltage driving circuit prioritizes executing the collision detection signal provided by the collision detection circuit.

[0019] In the technical solution of the embodiment of the present application, after a vehicle collision occurs, the collision sensor sends a signal to the airbag sensor. The airbag controller collects the signal and outputs a corresponding collision detection signal. One collision detection signal directly shuts down the high-voltage relay through the airbag controller, saving the time required to power down the high voltage after the collision. The other collision detection signal is sent to the battery management circuit. The high-voltage drive circuit, based on the drive control signal provided by the battery management circuit, simultaneously shuts down the high-voltage relay by issuing a high-voltage drive signal. Of the two signals, the collision detection signal output by the airbag controller not only shuts down the relay faster, but also has a higher priority than the drive control signal provided by the battery management circuit. If one of the two signals fails, the other signal can still shut down the high-voltage relay. Simultaneously, through the redundant control of the two signals, the high-voltage relay is ensured to be shut down after a collision, increasing the reliability and safety of the vehicle.

[0020] In some embodiments, the high-voltage driving circuit controls the high-voltage switch circuit to be turned off when the collision detection signal is at a high level and the driving control signal is at a low level.

[0021] In the technical solution of the embodiments of this application, the collision detection signal output by the airbag controller not only shuts off the relay more quickly than the drive control signal provided by the battery management circuit, but also has higher priority control than the drive control signal provided by the battery management circuit. If one of the two signals fails, the other signal can still control the high-voltage relay to shut down. Furthermore, through the redundant control of the two signals, the high-voltage relay is guaranteed to shut down after a collision, which improves the reliability and safety of the entire vehicle.

[0022] In some embodiments, the high-voltage driving circuit is further configured to execute the driving control signal after a first preset time period after the high-voltage switching circuit is controlled to be turned off.

[0023] In the technical solution of the embodiments of the present application, after a vehicle collision occurs, the collision sensor sends a signal to the airbag sensor. The airbag controller, upon receiving the signal, outputs a corresponding collision detection signal. One collision detection signal directly shuts down the high-voltage relay through the airbag controller, saving time for high-voltage power down after the collision. Another collision detection signal is sent to the battery management circuit. After shutting down the high-voltage switch circuit in response to the collision detection signal, the high-voltage drive circuit can then execute the drive control signal again after a first preset time period. In this way, the battery management circuit can determine whether the vehicle collision satisfies the relevant power-down conditions. If the relevant power-down conditions are met, the high-voltage drive circuit controls the high-voltage switch circuit to remain off according to the corresponding drive control signal. If the relevant power-down conditions are not met, the high-voltage drive circuit controls the high-voltage switch circuit to conduct according to the corresponding drive control signal, allowing the user to continue driving the vehicle. For example, if the vehicle collision is not serious, the drive control signal is a low level for controlling the conduction of the high-voltage switch circuit. The high-voltage drive circuit can control the conduction of the high-voltage switch circuit according to the low-level drive control signal, and the power battery pack in the vehicle is powered on, and the vehicle restores power. If the vehicle collision is serious, the drive control signal is a high level for controlling the shutdown of the high-voltage switch circuit. The high-voltage drive circuit controls the shutdown of the high-voltage switch circuit according to the high-level drive control signal, and the vehicle is in an undriveable state, avoiding safety hazards caused by the user continuing to drive the vehicle.

[0024] In some embodiments, the high-voltage driving circuit is further configured to control the high-voltage switching circuit to be turned on according to the received first maintenance control signal after controlling the high-voltage switching circuit to be turned off for a second preset time period.

[0025] In the technical solution of the embodiment of the present application, after a vehicle collision, if the vehicle needs repair, the user can provide a corresponding first maintenance control signal from the outside. After the high-voltage switch circuit is turned off for a second preset time period, the high-voltage switch circuit is controlled to be turned on according to the received first maintenance control signal, thereby providing corresponding power for the entire vehicle and facilitating the movement of the vehicle in the repair shop. The second preset time can be set according to the requirements of the application scenario. For example, the second preset time can be 1 hour or 5 hours.

[0026] A second aspect of the embodiments of the present application further provides a vehicle control system, comprising: a vehicle collision safety control circuit as described in any of the above embodiments.

[0027] A third aspect of the embodiments of the present application further provides a vehicle, comprising: a vehicle collision safety control circuit as described in any of the above embodiments.

[0028] In the technical solution of the embodiment of the present application, the vehicle includes a power battery pack, which is connected to the high-voltage output electrode via a high-voltage switching circuit. The collision detection circuit can be set at a corresponding position of the vehicle. When the vehicle collides, the collision detection circuit generates two collision detection signals, which are sent to the high-voltage drive circuit and the battery management circuit respectively. The high-voltage drive circuit directly generates a corresponding drive control signal according to the collision detection signal to control the high-voltage switch circuit to shut down, saving the high-voltage power-off time after the collision. In addition, another collision detection signal is sent to the battery management circuit, and the battery management circuit generates a drive control signal according to the collision detection signal, thereby providing redundant control signals for the high-voltage switch circuit. Even if one of the signals fails, the high-voltage switch circuit can be controlled to shut down in time according to the other signal, thereby increasing the safety and reliability of the entire vehicle after a collision.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0031] Figure 1 A schematic diagram of the first structure of a vehicle collision safety control circuit provided in an embodiment of the present application;

[0032] Figure 2 A second structural diagram of the vehicle collision safety control circuit provided in an embodiment of the present application;

[0033] Figure 3 A third structural diagram of the vehicle collision safety control circuit provided in an embodiment of the present application;

[0034] Figure 4 This is a fourth structural diagram of the vehicle collision safety control circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0038] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. References to the phrase "second connection port" at various locations in the specification do not necessarily refer to the same embodiment, nor do they constitute independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0040] In the description of the embodiments of the present application, the term "multi-frame" refers to two or more (including two).

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 a limitation on the embodiments of the present application.

[0042] In related technologies, the signal after a collision needs to first be transmitted from the collision sensor to the airbag controller, and the airbag controller sends a signal to the battery management module. The battery management module judges and processes the signal and outputs the corresponding control drive signal to turn off the high-voltage relay. However, there are problems such as long transmission time and inability to shut down quickly.

[0043] In order to solve the above technical problems, the embodiment of the present application provides a vehicle collision safety control circuit, see Figure 1 As shown, the vehicle collision safety control circuit in this embodiment is used to control the switching state of the high-voltage switch circuit 400. The high-voltage switch circuit 400 is connected in series with the power battery pack 500. The vehicle collision safety control circuit includes: a high-voltage drive circuit 300, a battery management circuit 200 and a collision detection circuit 100; the collision detection circuit 100 is used to generate a collision detection signal in the event of a vehicle collision; the battery management circuit 200 is connected to the collision detection circuit 100, and the battery management circuit 200 is used to collect the collision detection signal and generate a corresponding drive control signal based on the collision detection signal; the high-voltage drive circuit 300 is connected to the battery management circuit 200, the collision detection circuit 100 and the high-voltage switch circuit 400, and the high-voltage drive circuit 300 is used to generate a corresponding high-voltage drive signal based on the collision detection signal and the drive control signal to control the switching state of the high-voltage switch circuit 400.

[0044] In an embodiment of the present application, the high-voltage switch circuit 400 can be connected between the power battery pack 500 and the high-voltage output positive pole 600, and the collision detection circuit 100 can be set at a corresponding position of the vehicle. When a collision occurs in the vehicle, the collision detection circuit 100 generates two collision detection signals and sends them to the high-voltage drive circuit 300 and the battery management circuit 200 respectively. The high-voltage drive circuit 300 directly generates a corresponding drive control signal according to the collision detection signal to control the high-voltage switch circuit 400 to shut down, thereby saving the high-voltage power-off time after the collision. In addition, another collision detection signal is sent to the battery management circuit 200, and the battery management circuit 200 generates a drive control signal according to the collision detection signal, thereby providing redundant control signals for the high-voltage switch circuit 400. Even if one of the signals fails, the high-voltage switch circuit 400 can be controlled to shut down in time according to the other signal, thereby increasing the safety and reliability of the entire vehicle after a collision.

[0045] In some embodiments, see Figure 2As shown, the collision detection circuit 100 in this embodiment includes: a collision sensor 110 and an airbag controller 120; the collision sensor 110 generates a collision sensing signal when a vehicle collides; the airbag controller 120 is connected to the collision sensor 110, the battery management circuit 200 and the high-voltage drive circuit 300, and is used to generate two collision detection signals according to the collision sensing signal and send them to the battery management circuit 200 and the high-voltage drive circuit 300 respectively.

[0046] In an embodiment of the present application, the collision sensor 110 can be set at a corresponding position of the vehicle. When the vehicle collides, the collision sensor 110 generates a corresponding collision sensing signal and sends it to the airbag controller 120. The airbag controller 120 generates two collision detection signals and sends them to the high-voltage drive circuit 300 and the battery management circuit 200 respectively. The high-voltage drive circuit 300 directly generates a corresponding drive control signal according to the collision detection signal to control the high-voltage switch circuit 400 to shut down, saving the high-voltage power-off time after the collision. In addition, the other collision detection signal is sent to the battery management circuit 200, and the battery management circuit 200 generates a drive control signal according to the collision detection signal, thereby providing redundant control signals for the high-voltage switch circuit 400. Even if one of the signals fails, the high-voltage switch circuit 400 can be controlled to shut down in time according to the other signal, thereby increasing the safety and reliability of the entire vehicle after a collision.

[0047] In some embodiments, see Figure 3 As shown, the high-voltage switch circuit 400 includes: a high-voltage relay 410, the two ends of the coil of the high-voltage relay 410 are respectively connected to the high-voltage drive circuit 300 and the ground wire, and the two ends of the contact group of the high-voltage relay 410 are respectively connected to the positive pole of the power battery pack 500 and the high-voltage output positive pole.

[0048] In the embodiment of the present application, the coil of the high-voltage relay 410 is connected to the high-voltage driver circuit 300. The high-voltage driver circuit 300 controls the energization and de-energization of the coil of the high-voltage relay 410, thereby controlling the conduction and shutdown of the high-voltage relay 410. When a vehicle collision occurs, the collision sensor 110 generates a corresponding collision sensing signal and transmits it to the airbag controller 120. The airbag controller 120 generates two collision detection signals and transmits them to the high-voltage driver circuit 300 and the battery management circuit 200, respectively. The high-voltage driver circuit 300 directly generates a corresponding drive control signal based on the collision detection signal to control the high-voltage switch circuit 400 to shut down, thus saving the time required to power down the high-voltage power supply after the collision. Furthermore, the other collision detection signal is transmitted to the battery management circuit 200, which generates a drive control signal based on the collision detection signal. This provides redundant control signals for the high-voltage switch circuit 400. Even if one signal fails, the other signal can be used to control the high-voltage switch circuit 400 to shut down in a timely manner, thereby improving the safety and reliability of the entire vehicle after a collision.

[0049] In some embodiments, see Figure 4 As shown, the high-voltage driving circuit 300 in this embodiment includes an OR gate 310 and a high-voltage driver 320. The two output pins of the OR gate 310 are respectively connected to the collision detection circuit 100 and the battery management circuit 200. The output pin of the OR gate 310 is connected to the high-voltage driver 320. The high-voltage driver 320 generates a corresponding high-voltage driving signal according to the output level of the OR gate 310.

[0050] In an embodiment of the present application, the OR gate 310 performs logical processing on the input collision detection signal and the drive control signal. When any one of the collision detection signal and the drive control signal is at a high level, the high-voltage drive circuit 300 can output a corresponding high-voltage drive signal to control the high-voltage switch circuit 400 to shut down. If one of the two signals fails, the other signal can also control the high-voltage relay 410 to shut down. At the same time, through the redundant control of the two signals, the high-voltage relay 410 is ensured to be shut down after the collision, thereby increasing the reliability and safety of the entire vehicle.

[0051] In some embodiments, the high-voltage driving circuit 300 prioritizes the collision detection signal provided by the collision detection circuit 100 .

[0052] In the embodiment of the present application, after a vehicle collision, the collision sensor 110 sends a signal to the airbag controller 120. After receiving the signal, the airbag controller 120 outputs a corresponding collision detection signal. One collision detection signal directly shuts down the high-voltage relay 410 through the airbag controller 120, saving time for the high-voltage power supply after the collision. The other collision detection signal is sent to the battery management circuit 200. The high-voltage drive circuit 300, based on the drive control signal provided by the battery management circuit 200, simultaneously shuts down the high-voltage relay 410. Of the two signals, the collision detection signal output by the airbag controller 120 not only shuts down the relay more quickly but also has a higher priority than the drive control signal provided by the battery management circuit 200. If one of the two signals fails, the other signal can still shut down the high-voltage relay 410. Furthermore, through the redundant control of the two signals, the high-voltage relay 410 is guaranteed to be shut down after a collision, thereby increasing the reliability and safety of the vehicle.

[0053] In some embodiments, the high-voltage driving circuit 300 controls the high-voltage switch circuit 400 to be turned off when the collision detection signal is at a high level and the driving control signal is at a low level.

[0054] In this embodiment of the present application, the collision detection signal output by the airbag controller 120 not only shuts off the relay more quickly, but also has a higher priority than the drive control signal provided by the battery management circuit 200. If one of the two signals fails, the other signal can still shut off the high-voltage relay 410. Furthermore, through the redundant control of the two signals, the high-voltage relay 410 is guaranteed to be shut off after a collision, increasing the reliability and safety of the entire vehicle.

[0055] In some embodiments, the high-voltage driving circuit 300 is further configured to execute a driving control signal after a first preset time period after the high-voltage switching circuit 400 is controlled to be turned off.

[0056] In the embodiment of the present application, after a vehicle collision occurs, the collision sensor 110 sends a signal to the airbag controller 120. After receiving the signal, the airbag controller 120 outputs a corresponding collision detection signal. One collision detection signal directly shuts down the high-voltage relay 410 through the airbag controller 120, saving time for high-voltage power down after the collision. Another collision detection signal is sent to the battery management circuit 200. After shutting down the high-voltage switch circuit 400 in response to the collision detection signal, the high-voltage driver circuit 300 can resume driving the control signal after a first preset time period. In this way, the battery management circuit 200 can determine whether the vehicle collision meets the relevant power-down conditions. If the relevant power-down conditions are met, the high-voltage driver circuit 300 controls the high-voltage switch circuit 400 to remain off according to the corresponding drive control signal. If the relevant power-down conditions are not met, the high-voltage driver circuit 300 controls the high-voltage switch circuit 400 to be on according to the corresponding drive control signal, allowing the user to continue driving the vehicle. For example, if the vehicle collision is not serious, the drive control signal is a low level for controlling the high-voltage switch circuit 400 to be turned on. The high-voltage drive circuit 300 can control the high-voltage switch circuit 400 to be turned on according to the low-level drive control signal, and the power battery pack 500 in the vehicle is powered on, and the vehicle restores power. If the vehicle collision is serious, the drive control signal is a high level for controlling the high-voltage switch circuit 400 to be turned off. The high-voltage drive circuit 300 controls the high-voltage switch circuit 400 to be turned off according to the high-level drive control signal, and the vehicle is in an undriveable state, avoiding safety hazards caused by the user continuing to drive the vehicle.

[0057] In some embodiments, the first preset time period can be set according to application scenario requirements. For example, the first preset time period can be 5 minutes, or 30 minutes, or 1 hour.

[0058] In some embodiments, the high-voltage driving circuit 300 is further configured to control the high-voltage switch circuit 400 to be turned on according to the received first maintenance control signal after controlling the high-voltage switch circuit 400 to be turned off for a second preset time period.

[0059] In an embodiment of the present application, after a vehicle collision, if the vehicle needs repair, the user can provide a corresponding first maintenance control signal from the outside. After the high-voltage switch circuit 400 is turned off for a second preset time period, it controls the high-voltage switch circuit 400 to be turned on according to the received first maintenance control signal, thereby providing corresponding power for the entire vehicle and facilitating the movement of the vehicle in the repair shop. The second preset time can be set according to the requirements of the application scenario. For example, the second preset time period can be 1 hour or 5 hours.

[0060] An embodiment of the present application further provides a vehicle control system, comprising: a vehicle collision safety control circuit as described in any one of the above embodiments.

[0061] An embodiment of the present application further provides a vehicle, comprising: a vehicle collision safety control circuit as described in any one of the above embodiments.

[0062] In an embodiment of the present application, the vehicle includes a power battery pack 500, which is connected to the high-voltage output electrode via the high-voltage switch circuit 400. The collision detection circuit 100 can be set at a corresponding position of the vehicle. When a collision occurs in the vehicle, the collision detection circuit 100 generates two collision detection signals, which are respectively sent to the high-voltage drive circuit 300 and the battery management circuit 200. The high-voltage drive circuit 300 directly generates a corresponding drive control signal based on the collision detection signal to control the high-voltage switch circuit 400 to shut down, thereby saving the high-voltage power-off time after the collision. In addition, another collision detection signal is sent to the battery management circuit 200, and the battery management circuit 200 generates a drive control signal based on the collision detection signal, thereby providing redundant control signals for the high-voltage switch circuit 400. Even if one of the signals fails, the high-voltage switch circuit 400 can be controlled to shut down in time according to the other signal, thereby increasing the safety and reliability of the entire vehicle after a collision.

[0063] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0064] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0065] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the electronic device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0066] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0067] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0068] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A vehicle collision safety control circuit, characterized in that: The vehicle collision safety control circuit is used to control the switching state of the high-voltage switch circuit, which is connected in series with the power battery pack. The vehicle collision safety control circuit includes: a high-voltage drive circuit, a battery management circuit, and a collision detection circuit; The collision detection circuit is used to generate a collision detection signal in the event of a vehicle collision; The battery management circuit is connected to the collision detection circuit, and the battery management circuit is used to collect the collision detection signal and generate a corresponding drive control signal according to the collision detection signal; The high-voltage drive circuit is connected to the battery management circuit, the collision detection circuit and the high-voltage switch circuit. The high-voltage drive circuit is used to generate a corresponding high-voltage drive signal according to the collision detection signal and the drive control signal to control the switching state of the high-voltage switch circuit.

2. The vehicle collision safety control circuit according to claim 1, characterized in that: The collision detection circuit includes: a collision sensor and an airbag controller; The collision sensor generates a collision sensing signal when the vehicle collides; The airbag controller is connected to the collision sensor, the battery management circuit and the high-voltage drive circuit, and is used to generate two collision detection signals according to the collision sensing signal and send them to the battery management circuit and the high-voltage drive circuit respectively.

3. The vehicle collision safety control circuit according to claim 1, wherein: The high-voltage switch circuit includes: a high-voltage relay, wherein the two ends of the coil of the high-voltage relay are respectively connected to the high-voltage drive circuit and the ground wire, and the two ends of the contact group of the high-voltage relay are respectively connected to the positive electrode of the power battery pack and the high-voltage output positive electrode.

4. The vehicle collision safety control circuit according to any one of claims 1 to 3, characterized in that: The high-voltage drive circuit includes an OR gate and a high-voltage driver, wherein the two output pins of the OR gate are respectively connected to the collision detection circuit and the battery management circuit, and the output pin of the OR gate is connected to the high-voltage driver, and the high-voltage driver generates a corresponding high-voltage drive signal according to the output level of the OR gate.

5. The vehicle collision safety control circuit according to any one of claims 1 to 3, characterized in that: The high-voltage driving circuit preferentially executes the collision detection signal provided by the collision detection circuit.

6. The vehicle collision safety control circuit according to any one of claims 1 to 3, characterized in that: The high-voltage driving circuit controls the high-voltage switch circuit to be turned off when the collision detection signal is at a high level and the driving control signal is at a low level.

7. The vehicle collision safety control circuit according to any one of claims 1 to 3, characterized in that: The high-voltage driving circuit is further configured to execute the driving control signal after a first preset time period after the high-voltage switching circuit is controlled to be turned off.

8. The vehicle collision safety control circuit according to any one of claims 1 to 3, characterized in that: The high-voltage driving circuit is further configured to control the high-voltage switching circuit to be turned on according to the received first maintenance control signal after controlling the high-voltage switching circuit to be turned off for a second preset time period.

9. A vehicle control system, characterized in that: include: The vehicle collision safety control circuit according to any one of claims 1 to 8.

10. A vehicle, characterized in that: include: The vehicle collision safety control circuit according to any one of claims 1 to 8.

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