Vehicle emergency power-off system and vehicle

Abstract

The present invention relates to a vehicle emergency power-off system and a vehicle. The vehicle emergency power-off system includes an electronic control unit, a time delay relay, and a low-voltage power supply for supplying power to the electronic control unit and the time delay relay; the time delay relay is connected between the electronic control unit and the low-voltage power supply; the low-voltage power supply interrupts the power supply to the time delay relay when the vehicle is emergency powered off; the time delay relay after power failure delays disconnecting the low-voltage power supply to the electronic control unit; the electronic control unit after power failure disconnects the high-voltage relay on the vehicle, thereby ensuring that when an emergency occurs in the vehicle, the high-voltage relay can be disconnected through the electronic control unit to power off the vehicle. Furthermore, the vehicle emergency power-off device can avoid arcing or damage to high-voltage components caused by cutting off the high-voltage relay under load.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle safety, and in particular to a vehicle emergency power-off system and a vehicle. Background Art

[0002] Cars are an important means of daily travel for people. Currently, most cars are still powered by fossil fuels. However, with the deterioration of the environment, the intensification of the greenhouse effect and the depletion of energy, green travel is increasingly encouraged. Therefore, the development and use of electric vehicles, hybrid vehicles and other vehicles have been promoted.

[0003] However, whether in the process of research and development or in the process of use, controlling the high voltage in the car is an important means to improve the safety performance of electric vehicles. However, during the implementation process, the inventor found that there are at least the following problems in the traditional technology: the traditional technology cannot cut off the high voltage in time when some functions of the car fail. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle emergency power-off system and a vehicle to address the problem that traditional technology cannot cut off high voltage electricity in time when some functions on the car fail.

[0005] In order to achieve the above-mentioned object, on the one hand, an embodiment of the present application provides a vehicle emergency power-off system, including an electronic control unit, a time delay relay, and a low-voltage power supply for supplying power to the electronic control unit and the time delay relay;

[0006] The time delay relay is connected between the electronic control unit and the low voltage power supply;

[0007] When the vehicle is powered off in an emergency, the low-voltage power supply interrupts the power supply to the delay relay; after the power failure, the delay relay delays disconnecting the power supply of the low-voltage power supply to the electronic control unit; after the power failure, the electronic control unit cuts off the high-voltage relay on the vehicle.

[0008] In one of the embodiments, it also includes an on-off control module;

[0009] The low voltage power supply is connected to the coil of the time delay relay through the on-off control module.

[0010] In one embodiment, it includes a vehicle controller; the on-off control module is a switch module;

[0011] The switch module includes a first normally closed switch and a normally open switch;

[0012] The low-voltage power supply is connected to the coil of the time-delay relay through the first normally closed switch; and the vehicle controller is connected to the low-voltage power supply through the normally open switch.

[0013] In one embodiment, it also includes a power supply integration system, a drive motor system and an air conditioning high voltage system; the switch module also includes a second normally closed switch;

[0014] The power integration system, the drive motor system and the air conditioning high-voltage system are respectively connected to the low-voltage power supply through the second normally closed switch.

[0015] In one embodiment, it also includes an electromechanical coupling controller; the switch module also includes a third normally closed switch;

[0016] The electromechanical coupling controller is connected to the low voltage power supply via a third normally closed switch.

[0017] In one of the embodiments, it also includes an alarm module;

[0018] The alarm module is connected to the low voltage power supply through a normally open switch.

[0019] In one embodiment, it further includes a first short circuit protection unit, a second short circuit protection unit, a third short circuit protection unit and a fourth short circuit protection unit;

[0020] The first short-circuit protection unit is connected between the normally open switch and the low-voltage power supply;

[0021] The second short-circuit protection unit is connected between the first normally closed switch and the low-voltage power supply;

[0022] The third short-circuit protection unit is connected between the second normally closed switch and the low-voltage power supply;

[0023] The fourth short-circuit protection unit is connected between the third normally closed switch and the low-voltage power supply.

[0024] In one of the embodiments, it also includes an emergency power-off button;

[0025] The emergency power-off button is connected to the first normally closed switch and the normally open switch respectively.

[0026] In one embodiment, the electronic control unit is a power management system.

[0027] On the other hand, an embodiment of the present application further provides a vehicle, comprising the vehicle emergency power-off system as described above;

[0028] The electronic control unit of the vehicle's emergency power-off system is connected to the high-voltage relay on the vehicle.

[0029] One of the above technical solutions has the following advantages and beneficial effects:

[0030] The vehicle emergency power-off system is constructed by an electronic control unit, a time delay relay, and a low-voltage power supply for supplying power to the electronic control unit and the time delay relay, wherein the time delay relay is connected between the electronic control unit and the low-voltage power supply; the low-voltage power supply interrupts the power supply to the time delay relay when the vehicle is emergency powered off; the time delay relay after power failure delays disconnecting the low-voltage power supply to the electronic control unit; the electronic control unit after power failure disconnects the high-voltage relay on the vehicle, thereby ensuring that when an emergency occurs in the vehicle, the high-voltage relay can be disconnected by the electronic control unit to power off the vehicle. Furthermore, the vehicle emergency power-off device can avoid arcing or damage to high-voltage components caused by disconnecting the high-voltage relay under load. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A first structural schematic diagram of a vehicle emergency power-off system in one embodiment;

[0032] Figure 2 A second structural schematic diagram of a vehicle emergency power-off system in one embodiment;

[0033] Figure 3 A first structural schematic diagram of a switch module of a vehicle emergency power-off system in one embodiment;

[0034] Figure 4 A second structural schematic diagram of a switch module of a vehicle emergency power-off system in one embodiment;

[0035] Figure 5 A third structural schematic diagram of a switch module of a vehicle emergency power-off system in one embodiment;

[0036] Figure 6 The figure is a schematic diagram of the structure of a short-circuit protection unit of a vehicle emergency power-off system in one embodiment. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is considered to be “connected to” another element, it may be directly connected to the other element and integrated therewith, or an intermediate element may exist at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] In order to solve the problem that the conventional technology cannot cut off the high voltage electricity in time when some functions of the automobile fail, in one embodiment, Figure 1 As shown, a vehicle emergency power-off system is provided, comprising an electronic control unit 11, a time delay relay 13, and a low-voltage power supply 15 for supplying power to the electronic control unit 11 and the time delay relay 13;

[0041] The time delay relay 13 is connected between the electronic control unit 11 and the low voltage power supply 15;

[0042] When the vehicle is powered off in an emergency, the low-voltage power supply 15 interrupts the power supply to the delay relay 13; after the power failure, the delay relay 13 delays disconnecting the power supply of the low-voltage power supply 15 to the electronic control unit 11; after the power failure, the electronic control unit 11 cuts off the high-voltage relay 17 on the vehicle.

[0043] The term "vehicle" refers to a car that uses electricity as part or all of its power, such as an electric car or a hybrid electric car. The time delay relay is used to delay for a certain period of time, such as 500ms (milliseconds), after it loses power, to cut off the connection between the electronic control unit and the low-voltage power supply. The time delay relay is used to give the vehicle sufficient time to reduce the load and current, to avoid arcing, which may cause the high-voltage relay to stick and fail to cut off the high-voltage relay, or to cut off the high-voltage relay under load, which may seriously damage the high-voltage components and even break down the high-voltage components, thus endangering the safety of personnel.

[0044] The low-voltage power supply is the power supply provided by the electronic control unit and the time delay relay. In one example, the low-voltage power supply is a 12-volt voltage source. Furthermore, the low-voltage power supply can be directly replaced by the battery on the vehicle, so that the vehicle emergency power-off system can be powered by the battery on the vehicle, which can save the production cost of the vehicle and the design cost of the emergency power-off device of the electric vehicle. Specifically, a control switch is connected between the time delay relay and the low-voltage power supply, and the control switch controls the cutting off or on of the power supply of the low-voltage power supply to the electronic control unit.

[0045] Under the delay control of the delay relay, the electronic control unit disconnects the high voltage relay when the low voltage power supply is lost. In one example, the electronic control unit is a power management system. The power management system is used to implement the function of the vehicle emergency power-off system, further reducing the design cost of the vehicle emergency power-off system and saving resources.

[0046] The high-voltage relay of the vehicle is used to control the on-off of the battery module and the high-voltage junction box on the vehicle. The vehicle controller is the core component of the vehicle, which can realize the functions of system working mode control, vehicle energy management and optimization, functional vehicle fault identification and processing, vehicle network management, vehicle status monitoring, self-diagnosis and protection.

[0047] In each embodiment of the vehicle emergency power-off system of the present application, the vehicle emergency power-off system is constructed by an electronic control unit, a time delay relay, and a low-voltage power supply for supplying power to the electronic control unit and the time delay relay, wherein the time delay relay is connected between the electronic control unit and the low-voltage power supply; the low-voltage power supply interrupts the power supply to the time delay relay when the vehicle is emergency powered off; the time delay relay after power failure delays disconnecting the low-voltage power supply to the electronic control unit; the electronic control unit after power failure disconnects the high-voltage relay on the vehicle, thereby ensuring that when an emergency occurs in the vehicle, the high-voltage relay can be disconnected by the electronic control unit to power off the vehicle. Furthermore, the vehicle emergency power-off device can avoid arcing or damage to high-voltage components caused by cutting off the high-voltage relay under load.

[0048] In one embodiment, Figure 2 As shown, a vehicle emergency power-off system is provided, including an electronic control unit 11, a time delay relay 13, an on-off control module 19, and a low-voltage power supply 15 for supplying power to the electronic control unit 11 and the time delay relay 13;

[0049] The normally closed switch of the time delay relay 13 is connected between the electronic control unit 11 and the low-voltage power supply 15 ; the low-voltage power supply 15 is connected to the coil of the time delay relay 13 via the on-off control module 19 .

[0050] The on-off control module is used to disconnect or connect the low voltage power supply to the delay relay. There are many options for the control mode of the on-off control module, for example, an electronic switch mode or a mechanical switch mode.

[0051] After the time delay relay loses power supply, the normally closed switch opens with a delay, and the electronic control unit loses power supply.

[0052] In a specific embodiment, Figure 3 As shown, the vehicle emergency power-off system also includes a vehicle controller 21; the on-off control module 19 is a switch module 23;

[0053] The switch module 23 includes a first normally closed switch 231 and a normally open switch 233;

[0054] The low-voltage power supply 15 is connected to the coil of the time delay relay 13 via the first normally closed switch 231 ; the vehicle controller 21 is connected to the low-voltage power supply 15 via the normally open switch 233 .

[0055] Among them, the switch module is used to disconnect or turn on the low-voltage power supply to the vehicle controller and the delay relay. The switch module includes a normally open switch and a first normally closed switch. In one example, the normally open switch and the first normally closed switch are linked, that is, the first normally closed switch is disconnected while the normally open switch is closed. Furthermore, the vehicle emergency power-off system also includes an emergency power-off button; the emergency power-off button is respectively connected to the first normally closed switch and the normally open switch. When the power is turned off in an emergency, the emergency power-off button is activated, the normally open switch is closed, and the first normally closed switch is disconnected. In actual use, the emergency power-off button is installed in a position on the vehicle that is easy for the driver to reach, for example, it is arranged on the dashboard or the steering wheel, and preferably, it is arranged near the double flash position of the dashboard.

[0056] The specific working process of the vehicle emergency power-off system can be divided into two situations:

[0057] (1) When the vehicle controller is normal and the vehicle functions are complete, Figure 3 As shown, when a fault occurs, the user controls the switch module to operate, the D-1 and D-2 contacts of the normally open switch are closed, the vehicle controller is connected to the low-voltage power supply, the vehicle controller detects the level signal of the low-voltage power supply, the vehicle controller generates a disconnection instruction for the high-voltage relay, and sends it to the battery management system of the vehicle to instruct the battery management system to control the high-voltage relay to disconnect. In addition, the vehicle controller also generates a component working state switching instruction and a vehicle load reduction instruction, and sends them to the corresponding components; while the D-1 and D-2 contacts of the normally open switch are closed, the A-1 and A-2 contacts of the first normally closed switch are disconnected, the time delay relay is disconnected from the low-voltage power supply, the moving contact of the time delay relay contacts the normally open contact, the electronic control unit loses power supply, and the high-voltage relay is controlled to disconnect at the same time. In this case, both the vehicle controller and the electronic control unit issue control instructions, and the time delay relay executes the control instruction that arrives first.

[0058] (2) When the vehicle controller is abnormal or the vehicle function is incomplete, the high-voltage relay cannot be disconnected by the vehicle controller due to many reasons, such as the vehicle controller fault diagnosis function is not perfect, the engine stalls during driving, the vehicle controller cannot send instructions normally, the controlled cannot execute instructions, the vehicle communication failure or the vehicle function is incomplete. The high-voltage relay can only be disconnected by the electronic control unit, such as Figure 3 As shown, when a fault occurs, the user controls the switch module to operate, the A-1 and A-2 contacts of the first normally closed switch are disconnected, the time delay relay is disconnected from the low-voltage power supply, the moving contact of the time delay relay contacts the normally open contact, the electronic control unit loses power supply, and the high-voltage relay is controlled to disconnect at the same time.

[0059] Furthermore, the vehicle emergency power-off system also includes an alarm module connected to a normally open switch. The alarm module is used to inform the user whether the switch module is operating correctly. When the switch module is operating correctly, the D-1 and D-2 contacts of the normally open switch are connected, the alarm module is powered, and an alarm is issued. Furthermore, the alarm module can be a sound alarm device, a light alarm device, etc.

[0060] In each embodiment of the vehicle emergency power-off system of the present application, the first normally closed switch in the switch module is used to connect the coil of the delay relay to the low-voltage power supply, and the delay relay is used to control the delayed disconnection of the connection between the electronic control unit and the low-voltage power supply. When the switch module is pressed, the first normally closed switch is disconnected, and the power supply of the delay relay is cut off. After a certain delay, the delay relay disconnects the connection between the electronic control unit and the power supply battery. When the electronic control unit does not detect the level signal of the low-voltage power supply, it controls the high-voltage relay to disconnect and complete the vehicle power-off, thereby achieving dual protection of the vehicle power-off, ensuring that in the actual process, when the vehicle controller fails to issue a disconnection command of the high-voltage relay due to a fault or the corresponding controlled component fails to execute the disconnection command of the high-voltage relay, etc., resulting in the failure to power off the vehicle in time, the electronic control unit ensures that the high-voltage relay can be disconnected to power off the vehicle. Furthermore, the vehicle emergency power-off system can avoid arcing or damage to high-voltage components caused by the load-cutting off of the high-voltage relay.

[0061] In one embodiment, Figure 4 As shown, it also includes a power supply integration system 41, a drive motor system 43 and an air conditioning high voltage system 45; the switch module 23 also includes a second normally closed switch 235;

[0062] The power integration system 41 , the drive motor system 43 and the air conditioning high voltage system 45 are connected to the low voltage power supply 15 via the second normally closed switch 235 , respectively.

[0063] The second normally closed switch controls the disconnection or conduction of the low-voltage power supply to the power supply integration system, the drive motor system and the air conditioning high-voltage system. The power supply integration system, the drive motor system and the air conditioning high-voltage system all include sleep and wake-up states, wherein the power supply integration system, the drive motor system and the air conditioning high-voltage system are awakened by a high level.

[0064] The specific working process is as follows: Figure 4As shown, when the switch module is activated, the B-1 and B-2 contacts of the second normally closed switch are disconnected, and the power integration system, the drive motor system, and the air conditioning high-voltage system lose the wake-up source (the level signal of the low-voltage power supply). The power integration system integrates the on-board charger and the DC converter. After losing the wake-up source, the power integration system switches the working mode from the wake-up state to the sleep state; the drive motor system is used to control the motor operation. After losing the wake-up source, the drive motor system switches the working mode from the wake-up state to the sleep state, and controls the motor to stop working; the air conditioning high-voltage system controls the operation of related high-voltage components in the vehicle. After losing the wake-up source, the air conditioning high-voltage system switches the working mode from the wake-up state to the sleep state, and controls the related high-voltage components to stop working. It should be noted that the vehicle's emergency power-off system is used to control the vehicle's high-voltage components to be directly powered off, so that the high-voltage components of the entire vehicle can be powered off more quickly and the damage to the vehicle can be minimized.

[0065] The power integration system is used as an example to illustrate the working mode switching process: the working modes of the power integration system include stanby state (standby mode), ready state (ready to drive mode), driving state (driving), failure state (failure, unable to work normally), discharge state (releasing high-voltage electric energy through units such as resistors), etc. Specifically, assuming that the vehicle is driving at high speed, the whole vehicle is on high voltage (generally 350 volts to 480 volts), and the working mode of the power integration system is in the driving state (driving). At this time, due to an accident, the switch module is activated, and the connection state of B-1 and B-2 is switched to the disconnected state. The power integration system loses the wake-up source, and the working mode is immediately switched from the driving state to the discharge state, releasing the electric energy at the high-voltage end of the component. When the electric energy is released to a certain threshold, the working mode is switched to the stanby state, and then the power integration system enters the sleep state.

[0066] The vehicle emergency power-off system of the present application controls the wake-up source of high-voltage components such as the power supply integration system, the drive motor system, and the air-conditioning high-voltage system through a switch module in the vehicle emergency power-off system, thereby controlling the rapid power-off of high-voltage components such as the power supply integration system, the drive motor system, and the air-conditioning high-voltage system, thereby realizing faster power-off of the entire vehicle and ensuring the safety of the driver and passengers.

[0067] In one embodiment, Figure 5 As shown, it also includes an electromechanical coupling controller 51; the switch module 23 also includes a third normally closed switch 237;

[0068] The electromechanical coupling controller 51 is connected to the low-voltage power supply 15 via the third normally closed switch 237 .

[0069] The electromechanical coupling controller is a high-voltage control component of a hybrid electric vehicle, which is used to control the coupling between the electric drive system and the engine drive system. When the vehicle is a hybrid electric vehicle, the power supply of the electromechanical coupling controller is controlled by the switch module of the vehicle's off-line device. When the switch module is activated, such as Figure 5 As shown, the C-1 and C-2 contacts of the electromechanical coupling control normally closed switch are disconnected, the electromechanical coupling controller loses power supply, and the connection between the electric drive system and the engine drive system is cut off.

[0070] The vehicle power-off device of the present application directly controls the power supply of the electromechanical coupling controller through the switch module, thereby directly controlling the disconnection between the electric transmission system and the engine transmission system, ensuring that the connection between the electric transmission system and the engine transmission system can be quickly disconnected when a vehicle failure occurs, ensuring that the electric transmission system and the engine transmission system stop working as soon as possible.

[0071] In one embodiment, Figure 6 As shown, it also includes a first short circuit protection unit 61, a second short circuit protection unit 63, a third short circuit protection unit 65 and a fourth short circuit protection unit 67;

[0072] The first short circuit protection unit 61 is connected between the normally open switch 233 and the low voltage power supply 15;

[0073] The second short circuit protection unit 63 is connected between the first normally closed switch 231 and the low voltage power supply 15;

[0074] The third short circuit protection unit 65 is connected between the second normally closed switch 235 and the low voltage power supply 15;

[0075] The fourth short circuit protection unit 67 is connected between the third normally closed switch 237 and the low voltage power supply 15 .

[0076] Among them, the low-voltage power supply is divided into lines to supply power to the vehicle controller, electronic control unit, power integration system, drive motor system, air conditioning high-voltage system, delay relay, etc., so as to avoid power supply failure of the whole vehicle due to short circuit of one of the components. Furthermore, in order to prevent the vehicle controller, electronic control unit, power integration system, drive motor system, air conditioning high-voltage system, and delay relay from damaging the low-voltage power supply when a short circuit occurs, a short-circuit protection unit is connected between the low-voltage power supply and the vehicle controller, electronic control unit, power integration system, drive motor system, air conditioning high-voltage system, and delay relay.

[0077] The vehicle emergency power-off system of the present application ensures the power supply safety of the low-voltage power supply by installing a short-circuit protection unit between the low-voltage power supply and the vehicle controller, electronic control unit, power integration system, drive motor system, air-conditioning high-voltage system, and delay relay.

[0078] In one embodiment, a vehicle is provided, including the vehicle emergency power-off system described in each embodiment of the vehicle emergency power-off system;

[0079] The electronic control unit of the vehicle's emergency power-off system is connected to the high-voltage relay on the vehicle.

[0080] The vehicle of the present application, after being installed with the vehicle emergency power-off system, can provide a quick and effective way to power off the vehicle when a failure occurs, thereby making the vehicle safer.

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A vehicle emergency power-off system, characterized in that: It includes an electronic control unit, a time delay relay, and a low voltage power supply for supplying power to the electronic control unit and the time delay relay; The time delay relay is connected between the electronic control unit and the low voltage power supply; When the vehicle is powered off in an emergency, the low-voltage power supply interrupts the power supply to the delay relay; after the power failure, the delay relay delays disconnecting the power supply of the low-voltage power supply to the electronic control unit; after the power failure, the electronic control unit cuts off the high-voltage relay on the vehicle.

2. The vehicle emergency power-off system according to claim 1, characterized in that: Also includes an on-off control module; The low-voltage power supply is connected to the coil of the time delay relay through the on-off control module.

3. The vehicle emergency power-off system according to claim 2, characterized in that: It includes a vehicle controller; the on-off control module is a switch module; The switch module includes a first normally closed switch and a normally open switch; The low-voltage power supply is connected to the coil of the delay relay through the first normally closed switch; the vehicle controller is connected to the low-voltage power supply through the normally open switch.

4. The vehicle emergency power-off system according to claim 3, characterized in that: It also includes a power supply integration system, a drive motor system and an air conditioning high-voltage system; the switch module also includes a second normally closed switch; The power supply integration system, the drive motor system and the air-conditioning high-voltage system are respectively connected to the low-voltage power supply through the second normally closed switch.

5. The vehicle emergency power-off system according to claim 4, characterized in that: It also includes an electromechanical coupling controller; the switch module also includes a third normally closed switch; The electromechanical coupling controller is connected to the low-voltage power supply via the third normally closed switch.

6. The vehicle emergency power-off system according to claim 5, characterized in that: It also includes an alarm module; The alarm module is connected to the low-voltage power supply through the normally open switch.

7. The vehicle emergency power-off system according to claim 6, characterized in that: It also includes a first short circuit protection unit, a second short circuit protection unit, a third short circuit protection unit and a fourth short circuit protection unit; The first short-circuit protection unit is connected between the normally open switch and the low-voltage power supply; The second short-circuit protection unit is connected between the first normally closed switch and the low-voltage power supply; The third short-circuit protection unit is connected between the second normally closed switch and the low-voltage power supply; The fourth short-circuit protection unit is connected between the third normally closed switch and the low-voltage power supply.

8. The vehicle emergency power-off system according to any one of claims 3 to 7, characterized in that: It also includes an emergency power-off button; The emergency power-off button is connected to the first normally closed switch and the normally open switch respectively.

9. The vehicle emergency power-off system according to claim 1, characterized in that: The electronic control unit is a power management system.

10. A vehicle, characterized in that: A vehicle emergency power-off system comprising any one of claims 1 to 9; The electronic control unit of the vehicle emergency power-off system is connected to a high-voltage relay on the vehicle.

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