Hybrid vehicle and power source emergency disconnect device therefor

Abstract

The embodiment of the application discloses a hybrid vehicle and a power source emergency disconnect device thereof. The vehicle comprises an engine and a motor. The engine is driven by an engine driving main circuit, and the motor is driven by a motor driving main circuit. The power source emergency disconnect device comprises a control switch. The control switch is arranged to be controlled by a driver to control the on-off of the engine driving main circuit and the motor driving main circuit, so as to control the output torque of the engine and the motor. According to the embodiment, when the power is out of control during driving, the driving force of the engine and the motor can be interrupted, and the braking and steering functions of the vehicle are reserved, so that the vehicle can be safely parked.

Description

Technical Field

[0001] This application relates to vehicle control technology, and more particularly to a hybrid vehicle and its power source emergency disconnection device. Background Technology

[0002] New energy hybrid vehicles are powered by two parts: an engine power system and an electric motor power system. These two systems are complex in structure and interconnected. The engine system, high-voltage control system, and electric motor drive system of a hybrid vehicle are all located in a single front compartment, operating in a harsh environment. Furthermore, these systems are subjected to vibration and impact conditions while the vehicle is on the road, which increases the probability of system failure. According to statistics from the transportation department, most power loss-of-control incidents in new energy vehicles are primarily caused by hybrid system malfunctions, leading to the failure of functions such as the accelerator and brakes. Therefore, it is necessary to add an emergency protection device to hybrid vehicles in case of a failure in the vehicle's power control system, ensuring that the vehicle can safely decelerate and stop.

[0003] Most existing new energy vehicles only automatically cut off the power source and high-voltage system in the event of a severe collision. Some require complicated operations, and coupled with improper operation by drivers due to high tension, traffic accidents are very likely to occur. Summary of the Invention

[0004] This application provides a hybrid vehicle and its power source emergency disconnection device, which can urgently interrupt the driving force of the engine and motor when power loss occurs during driving, while retaining the vehicle's braking and steering functions to ensure that the vehicle can be safely stopped.

[0005] This application provides an emergency power source disconnection device for a hybrid vehicle. The power source of the hybrid vehicle may include an engine and an electric motor. The engine is driven by an engine drive main circuit, and the electric motor is driven by a motor drive main circuit. The emergency power source disconnection device includes a control switch.

[0006] The control switch can be configured to allow the driver to actively control the on / off state of the engine drive main circuit and the motor drive main circuit with a single button press, thereby controlling the output torque of the engine and the motor.

[0007] In an exemplary embodiment of this application, the control switch is a switch assembly, which may include: a first switch, a second switch, and a third switch;

[0008] The first switch is located in the engine drive main circuit and is used to control the on / off state of the engine drive main circuit;

[0009] The second switch is located in the main motor drive circuit and is used to control the on / off state of the main motor drive circuit;

[0010] The third switch is used to simultaneously control the on / off state of the first switch and the second switch;

[0011] or,

[0012] The control switch is a single switch, and the control switch includes a fourth switch;

[0013] The fourth switch is simultaneously installed in both the engine drive main circuit and the motor drive main circuit, and is used to simultaneously control the on / off state of both the engine drive main circuit and the motor drive main circuit.

[0014] In an exemplary embodiment of this application, both the third switch and the fourth switch are emergency switches.

[0015] In an exemplary embodiment of this application, the engine drive main circuit may include: an engine controller, an engine main relay, and an engine;

[0016] The engine controller is configured to issue an activation command to the engine main relay;

[0017] The engine main relay is configured to supply power to the engine's injectors and spark plugs after being activated according to the activation command;

[0018] The engine is configured to output torque when the injector is injecting fuel normally and the spark plug is ignited.

[0019] In an exemplary embodiment of this application, the first switch or the fourth switch is disposed before the engine main relay and is used to control the on / off of the power supply to the engine main relay, thereby controlling whether the engine outputs torque.

[0020] In an exemplary embodiment of this application, the first switch or the fourth switch is disposed after the engine main relay and is used to control the on / off of the power supply to the fuel injector and spark plug, thereby controlling whether the engine outputs torque.

[0021] In an exemplary embodiment of this application, the motor drive main circuit may include: a battery controller, a battery precharge relay, a battery pack, and a motor;

[0022] The battery controller is configured to issue an engagement command to the battery precharge relay;

[0023] The battery precharge relay is configured to connect the battery pack to the motor after being activated according to the activation command.

[0024] The motor is configured to be powered by the battery pack and output torque after being connected to the battery pack.

[0025] In an exemplary embodiment of this application, the second switch or the fourth switch is disposed before the battery precharge relay and is used to control the on / off state of the power supply to the battery precharge relay, thereby controlling whether the motor outputs torque.

[0026] In an exemplary embodiment of this application, the second switch or the fourth switch is disposed between the battery pack and the motor, and is used to control the connection and disconnection between the battery pack and the motor, thereby controlling whether the motor outputs torque.

[0027] This application also provides a hybrid vehicle that may include the aforementioned power source emergency disconnection device.

[0028] Compared with related technologies, the power source of the hybrid vehicle in this embodiment may include an engine and an electric motor; the engine is driven by an engine drive main circuit, and the electric motor is driven by a motor drive main circuit; the power source emergency disconnection device includes a control switch; the control switch can be configured to allow the driver to actively control the on / off state of the engine drive main circuit and the motor drive main circuit with a single button, thereby controlling the output torque of the engine and the motor. Through this embodiment, in the event of power loss during driving, the driving force of the engine and the electric motor can be urgently interrupted, while retaining the vehicle's braking and steering functions, ensuring the vehicle can be safely stopped.

[0029] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0030] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0031] Figure 1 This is a schematic diagram of the connection structure of the power source emergency disconnection device for a hybrid vehicle according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram illustrating the working principle of the engine drive system according to an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of connecting a first switch or a fourth switch after the engine main relay according to an embodiment of this application;

[0034] Figure 4 This is a schematic diagram illustrating the working principle of the motor drive system according to an embodiment of this application;

[0035] Figure 5 This is a schematic diagram illustrating the connection of a second or fourth switch before the battery precharge relay according to an embodiment of this application;

[0036] Figure 6 This is a block diagram of a hybrid vehicle according to an embodiment of this application. Detailed Implementation

[0037] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0038] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0039] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0040] This application provides an emergency power source disconnection device 1 for a hybrid vehicle, such as... Figure 1 As shown, the power source of the hybrid vehicle may include an engine 2 and an electric motor 3; the engine 2 is driven by an engine drive main circuit, and the electric motor 3 is driven by an electric motor drive main circuit; the power source emergency disconnection device 1 includes: a control switch;

[0041] The control switch can be configured to allow the driver to actively control the on / off state of the engine drive main circuit and the motor drive main circuit with a single button, thereby controlling the output torque of the engine 2 and the motor 3.

[0042] In the exemplary embodiments of this application, most existing new energy vehicles only automatically cut off the power source and high-voltage system in the event of a severe collision. Some solutions require cumbersome operations, and coupled with improper operation by the driver due to high tension, traffic accidents are easily caused. Therefore, actively cutting off the power source of a new energy hybrid vehicle in the event of power loss is particularly critical.

[0043] In the exemplary embodiments of this application, compared with the traditional passive deceleration and parking method, the solution of this application embodiment can enable the driver to actively cut off the power source in the first instance by controlling the switch when encountering power loss during driving, thereby achieving the purpose of slowing down and stopping, and effectively protecting the safety of the people in the vehicle.

[0044] In an exemplary embodiment of this application, the control switch is a switch assembly, which may include: a first switch 11, a second switch 12, and a third switch 13;

[0045] The first switch 11 is disposed in the engine drive main circuit and is used to control the on / off state of the engine drive main circuit;

[0046] The second switch 12 is disposed in the main circuit of the motor drive and is used to control the on and off of the main circuit of the motor drive;

[0047] The third switch 13 is used to simultaneously control the on / off state of the first switch 11 and the second switch 12;

[0048] or,

[0049] The control switch is a single switch, and the control switch includes a fourth switch 14;

[0050] The fourth switch 14 is simultaneously disposed in both the engine drive main circuit and the motor drive main circuit, and is used to simultaneously control the on / off state of both the engine drive main circuit and the motor drive main circuit. In an exemplary embodiment of this application, the engine drive main circuit may include: an engine controller 4, an engine main relay 5, and an engine 2;

[0051] The engine controller 4 is configured to send an activation command to the engine main relay 5;

[0052] The engine main relay 5 is configured to supply power to the fuel injector 21 and spark plug 22 of the engine 2 after being activated according to the activation command;

[0053] The engine 2 is configured to output torque when the injector 21 is injecting fuel normally and the spark plug 22 is ignited.

[0054] In an exemplary embodiment of this application, the drive system of the new energy hybrid vehicle consists of two parts: an engine 2 and a motor 3. The drive of the engine 2 and the motor 3 is respectively composed of an engine controller 4 and a battery controller 6. The vehicle is equipped with two batteries: one is a small 12V battery that supplies power to the ECU (Electronic Control Unit), braking system A, steering system B, etc., and the other is a battery pack 8 (which is a high-voltage battery pack) that mainly supplies power to the motor 3.

[0055] In an exemplary embodiment of this application, when the driver requests torque, the drive system of engine 2 operates as follows: Figure 2 As shown, the engine controller 4 sends a energizing command to the engine main relay 5; after the engine main relay is energized according to the energizing command, it provides 5V power to the fuel injector 21 and spark plug 22 of the engine 2; the fuel injector 21 injects fuel normally, the spark plug 22 ignites, and the engine 2 begins to output torque.

[0056] In an exemplary embodiment of this application, the first switch 11 or the fourth switch 14 may be disposed before the engine main relay 4 to control the on / off of the power supply to the engine main relay 4, thereby controlling whether the engine 2 outputs torque.

[0057] In an exemplary embodiment of this application, the first switch 11 or the fourth switch 14 may also be disposed after the engine main relay 4 to control the on / off of the power supply to the injector 21 and the spark plug 22, thereby controlling whether the engine 2 outputs torque.

[0058] In an exemplary embodiment of this application, when the vehicle's power becomes uncontrollable and the power source urgently needs to be disconnected, for the engine drive system, a switch (first switch 11 or the fourth switch 14) can be added to the circuit before or after the engine main relay 4. Pressing this switch can directly disconnect the power supply to the fuel injector 21 and spark plug 22, causing the engine 2 to stop injecting fuel and igniting, and stop outputting torque. Figure 3 As shown, the embodiment of this application takes the example of connecting a switch after the engine main relay 4. The advantage of this solution is that even if the engine main relay 4 is stuck, the power output of the engine 2 can be disconnected.

[0059] In an exemplary embodiment of this application, the motor drive main circuit may include: a battery controller 6, a battery precharge relay 7, a battery pack 8, and a motor 3;

[0060] The battery controller 6 is configured to send an engagement command to the battery precharge relay 7;

[0061] The battery precharge relay 7 is configured to connect the battery pack 8 to the motor 3 after being activated according to the activation command;

[0062] The motor 3 is configured to be powered by the battery pack 8 and output torque after being connected to the battery pack 8.

[0063] In an exemplary embodiment of this application, when the driver requests torque, the drive system of engine 2 operates as follows: Figure 4 As shown, the battery controller 6 sends a charging command to the battery precharge relay 7; after the battery precharge relay 7 charges according to the charging command, it connects the battery pack 8 to the motor 3 (i.e., the high-voltage circuit is connected); the motor 3 is powered by the battery pack 8 and outputs torque.

[0064] In an exemplary embodiment of this application, the second switch 12 or the fourth switch 14 may be disposed before the battery precharge relay 7 to control the on / off power supply of the battery precharge relay 7, thereby controlling whether the motor 3 outputs torque.

[0065] In an exemplary embodiment of this application, the second switch 12 or the fourth switch 14 may also be disposed between the battery pack 8 and the motor 3 to control the on / off state of the battery pack 8 and the motor 3, thereby controlling whether the motor 3 outputs torque.

[0066] In an exemplary embodiment of this application, when the vehicle power loses control and the power source needs to be disconnected urgently, the motor drive system may include two solutions: 1) connecting a switch (i.e., the second switch 12 or the fourth switch 14) to the control line before the battery precharge relay 7; 2) connecting a switch (i.e., the second switch 12 or the fourth switch 14) to the high-voltage line after the battery precharge relay 7; pressing the switch can forcibly disconnect the high-voltage circuit, and the motor 3 will stop outputting torque.

[0067] In exemplary embodiments of this application, as Figure 5As shown, the first solution can be adopted in the embodiments of this application. The advantage of this solution is that it is easy to operate and the control of the low voltage line does not require disassembly and assembly of the power battery pack 8. It also avoids the safety risks caused by operating the high voltage circuit.

[0068] In an exemplary embodiment of this application, the third switch 13 may be, but is not limited to, an emergency switch. Closing an emergency switch can achieve the purpose of actively cutting off the power source immediately, making the operation very simple.

[0069] In an exemplary embodiment of this application, to prevent accidental activation by the driver or passenger, the solution of this embodiment can cut off the power source by pressing and holding the third switch 13 or the fourth switch 14. For example, it is necessary to press and hold for 3 seconds before the first switch 11 and the second switch 12 in the emergency power source cut-off device will cut off the power source of the engine 2 and the motor 3, thus preventing accidental activation by the driver or passenger.

[0070] The exemplary embodiments of this application include at least the following advantages:

[0071] (1) This technical solution only cuts off the control unit signals of the engine and motor, and will not affect the functions of other vehicle systems (including but not limited to the braking system and steering system). The braking system and steering system can still work normally and are safe and reliable.

[0072] (2) After the output power of the engine and motor is cut off, the original inertial force of the engine and motor can be slowly consumed by the braking system, so there is no need to add an additional energy consumption device. The steering system also works normally, and the driver can decelerate and stop normally.

[0073] (3) The power source can be actively cut off at the first time by closing an emergency switch, which is very simple to operate.

[0074] (4) The power source can be cut off by long press, which can prevent the driver or passenger from accidentally triggering it.

[0075] (5) To enable a hybrid vehicle with runaway power to safely decelerate and stop in a simple and effective manner without damaging the vehicle parts.

[0076] (6) After the vehicle malfunction is resolved, the emergency switch is restored, and the vehicle can be driven normally again, which is convenient and practical.

[0077] This application also provides a hybrid vehicle 9, such as... Figure 6 As shown, it may include the aforementioned power source emergency disconnection device 1.

[0078] In the exemplary embodiments of this application, any of the aforementioned power source emergency disconnection device 1 is applicable to the hybrid vehicle 9, and will not be described in detail here.

[0079] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. A power source emergency disconnect device for a hybrid vehicle, characterized by The power source of the hybrid vehicle comprises an engine and a motor; the engine is driven by an engine driving main circuit, and the motor is driven by a motor driving main circuit; The power source emergency disconnect device comprises a control switch; The control switch is configured to be actively controlled by a driver to control the on-off of the engine driving main circuit and the motor driving main circuit, so as to control the output torque of the engine and the motor; The power source emergency disconnect device can interrupt the driving force of the engine and the motor in an emergency when the power is out of control during driving, while retaining the braking and steering functions of the vehicle, so as to ensure the safe parking of the vehicle; The control switch is a switch assembly, which comprises a first switch, a second switch and a third switch; The first switch is arranged in the engine driving main circuit to control the on-off of the engine driving main circuit; The second switch is arranged in the motor driving main circuit to control the on-off of the motor driving main circuit; The third switch is used to control the on-off of the first switch and the second switch at the same time; Alternatively, The control switch is a single switch, and the control switch comprises a fourth switch; The fourth switch is arranged in the engine driving main circuit and the motor driving main circuit at the same time to control the on-off of the engine driving main circuit and the motor driving main circuit at the same time; The engine driving main circuit comprises an engine controller, an engine main relay and an engine; The engine controller is configured to send an attraction instruction to the engine main relay; The engine main relay is configured to provide power to the fuel injector and the spark plug of the engine according to the attraction instruction after attraction; The engine is configured to start outputting torque when the fuel injector normally injects fuel and the spark plug ignites; The first switch or the fourth switch is arranged before the engine main relay to control the on-off of the power supply of the engine main relay, so as to control whether the engine outputs torque.

2. The hybrid vehicle power source emergency disconnect device of claim 1, wherein The third switch and the fourth switch are both emergency switches.

3. The power source emergency disconnect device of the hybrid vehicle according to claim 1, wherein The first switch or the fourth switch is arranged after the engine main relay to control the on-off of the power supply of the fuel injector and the spark plug, so as to control whether the engine outputs torque.

4. The hybrid vehicle power source emergency disconnect device of claim 1, wherein The motor driving main circuit comprises a battery controller, a battery pre-charging relay, a battery pack and a motor; The battery controller is configured to send an attraction instruction to the battery pre-charging relay; The battery pre-charging relay is configured to connect the battery pack and the motor after attraction according to the attraction instruction; The motor is configured to be powered by the battery pack and output torque after being connected with the battery pack.

5. The power source emergency disconnect device of the hybrid vehicle according to claim 4, wherein The second switch or the fourth switch is arranged before the battery pre-charging relay and is used to control the on-off of the power supply of the battery pre-charging relay, so as to control whether the motor outputs torque.

6. The power source emergency disconnect device of a hybrid vehicle according to claim 4, characterized in that, The second switch or the fourth switch is arranged between the battery pack and the motor and is used to control the on-off of the battery pack and the motor, so as to control whether the motor outputs torque.

7. A hybrid vehicle characterized by comprising: The power source emergency disconnect device according to any one of claims 1 to 6.

Images