Vehicle collision safety protection system and method, and vehicle and medium

Abstract

A vehicle collision safety protection system and method, and a vehicle and a medium. The vehicle collision safety protection system comprises: a first protection switch unit, which is arranged in a high-voltage loop of a traction battery; a second protection switch unit, which is connected in series to a positive electrode of the traction battery; at least one collision detection unit, which is used for detecting whether a collision occurs at a vehicle; and a control unit, which is used for controlling, when a collision occurs at the vehicle, the second protection switch unit to turn off and the first protection switch unit to turn off, so as to perform dual protection.

Description

Vehicle collision safety protection system, method, vehicle and medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202310723142.X, filed on June 16, 2023, entitled “Vehicle Collision Safety Protection System, Method, Vehicle and Medium,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of vehicle safety technology, and in particular to a vehicle collision safety protection system, method, vehicle, and medium. Background Art

[0004] In the related art, safety is ensured by cutting off the high-voltage relay when a vehicle collides. However, if the high-voltage relay fails, it is easy for the high-voltage relay to fail to be successfully disconnected, posing a threat to vehicle safety.

[0005] Public content

[0006] The present disclosure aims to at least partially solve one of the technical problems in the related art. To this end, one object of the present disclosure is to provide a vehicle collision safety control protection system, method, vehicle and medium capable of cutting off vehicle high voltage when a vehicle collision occurs.

[0007] A vehicle collision safety control and protection system according to an embodiment of the present disclosure includes:

[0008] A first protection switch unit is provided in a high-voltage circuit of the power battery;

[0009] a second protection switch unit, the second protection switch unit being connected in series to the positive electrode of the power battery;

[0010] at least one collision detection unit, configured to detect whether the vehicle has collided;

[0011] The control unit is used to control the second protection switch unit to be disconnected and the first protection switch unit to be disconnected when the vehicle collides, so as to provide double protection.

[0012] In the above scheme, the second protective switch unit is an intelligent fuse, which includes a gunpowder ignition part, a driving part and a cut-off. When the intelligent fuse receives a disconnection command issued by the control unit, it ignites the inside of the gunpowder ignition part to drive the driving part to move quickly so that the cut-off part cuts off the copper bar.

[0013] In the above solution, the first protection switch unit includes:

[0014] a main positive relay, the main positive relay being connected in series with the second protection switch unit;

[0015] Main negative relay, the main negative relay is connected in series to the negative pole of the power battery;

[0016] The control unit is also used to control the main positive relay and the main negative relay to be disconnected respectively when the vehicle collides, so as to disconnect the high-voltage circuit.

[0017] In the above solution, the collision detection unit includes a first collision detection unit and a second collision detection unit. The first collision detection unit includes a first collision sensor and an airbag controller. When the first collision sensor detects a vehicle collision, the airbag controller sends collision information to the control unit. The second collision detection unit includes a second collision sensor. When the second collision sensor detects a vehicle collision, it sends a collision signal to the control unit.

[0018] The control unit determines that the vehicle has collided when receiving at least one of the collision information and the collision signal.

[0019] A vehicle according to an embodiment of the present disclosure includes any one of the above-mentioned vehicle collision safety protection systems.

[0020] According to a vehicle collision safety control protection method according to an embodiment of the present disclosure, the vehicle includes a first protection switch unit, a power battery, and a second protection switch unit. The first protection switch unit is provided in a high-voltage circuit of the power battery, and the second protection switch unit is connected in series to a positive electrode of the power battery. The method includes:

[0021] Detect whether the vehicle has collided;

[0022] When a collision of the vehicle is detected, the second protection switch unit is controlled to be disconnected, and the first protection switch unit is controlled to be disconnected to perform double protection.

[0023] In the above solution, the second protection switch is an intelligent fuse, which includes a powder ignition unit, a drive unit, and a cut-off unit. Controlling the second protection switch unit to disconnect includes:

[0024] An ignition signal is triggered, and the interior of the gunpowder ignition part is ignited according to the ignition signal to drive the driving part to move quickly so that the cutting part cuts off the copper bar.

[0025] In the above solution, the first protection switch unit includes a main positive relay and a main negative relay, the main positive relay is connected in series with the second protection switch unit, and the main negative relay is connected in series to the negative electrode of the power battery. Controlling the first protection switch unit to disconnect includes:

[0026] Control the main positive relay and the main negative relay to be disconnected respectively to disconnect the high voltage circuit.

[0027] In the above solution, detecting whether a vehicle has collided includes:

[0028] detecting whether the vehicle has collided by means of a first collision sensor to receive collision information sent by an airbag controller connected to the first collision sensor, and detecting whether the vehicle has collided by means of a second collision sensor to receive a collision signal sent by the second collision sensor;

[0029] It is determined whether the vehicle has collided based on at least one of the collision information and the collision signal.

[0030] According to the computer-readable storage medium of the embodiment of the present disclosure, a computer program is stored thereon, and when the computer program is executed by a processor, the steps of the above-mentioned vehicle collision safety protection method are implemented.

[0031] According to the vehicle collision safety control protection system, method, vehicle and medium of the embodiment of the present disclosure, when a vehicle collision is detected, the first protection switch unit and the second protection switch unit can be disconnected by simultaneously controlling the disconnection. If one of the disconnection methods fails, the other disconnection method can also achieve the purpose of cutting off the high voltage, thereby improving the success rate of cutting off the high voltage and ensuring the safety of the vehicle.

[0032] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0034] FIG1 is a control block diagram of a vehicle collision safety protection system according to one embodiment;

[0035] FIG2 is an electrical schematic diagram of a vehicle collision safety protection system according to one embodiment;

[0036] FIG3 is a schematic flow chart of a vehicle collision safety protection method according to an embodiment;

[0037] FIG4 is a schematic flow chart of a vehicle collision safety protection method according to another embodiment;

[0038] FIG5 is a flow chart of a vehicle collision safety protection method in yet another embodiment. DETAILED DESCRIPTION

[0039] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0040] The implementation details of the technical solution of the embodiment of the present disclosure are described in detail below.

[0041] As shown in FIG1 , FIG1 provides a control block diagram of a vehicle collision safety protection system. The working principle of the vehicle collision safety protection system will be described in detail below in conjunction with FIG1 .

[0042] In one embodiment, a vehicle collision safety protection system includes a first protection switch unit, a second protection switch unit, at least one collision detection unit, and a control unit.

[0043] The first protection switch unit is arranged in the high-voltage circuit of the power battery. Therefore, when the first protection unit is disconnected, the high-voltage circuit of the power battery can be cut off, preventing the power battery from continuing to provide high-voltage output to the vehicle end.

[0044] The second protection switch unit is provided at the positive terminal of the power battery and is connected in series with the positive terminal of the power battery. Therefore, when the second protection switch unit is disconnected, the positive output of the power battery can be cut off.

[0045] As shown in Figure 2, which shows the electrical schematic of the vehicle collision safety protection system, the positive output terminal of the power battery is connected to the second protection switch unit, and the first protection switch unit is then connected to the high-voltage circuit of the power battery. Specifically, the input terminal of the first protection switch unit is connected to the second protection switch unit, and the output terminal of the first protection switch unit is connected to the negative terminal of the power battery, so that the second protection switch unit is placed inside the first protection switch unit. It should be noted that the position close to the power battery is referred to as the inside, and the position away from the power battery is referred to as the outside. In the electrical schematic of Figure 2, the position where the second protection switch unit is connected to the circuit is closer to the power battery than the position where the first protection switch unit is connected to the circuit.

[0046] At least one collision detection unit can detect whether the vehicle has collided using different sensors. For example, a three-axis acceleration sensor can detect changes in the vehicle's real-time acceleration to detect whether the vehicle has collided. In actual applications, to avoid situations where the collision detection unit may falsely detect a vehicle collision or fail to detect a vehicle collision due to a malfunction, multiple collision detection units can be configured to improve the accuracy of vehicle collision detection.

[0047] The control unit controller is essentially a battery management system (BMS). The main functions of BMS are to improve the utilization rate of power batteries, prevent overcharging and over-discharging of power batteries, extend the service life of power batteries, monitor battery status, and be a system that can manage, control and use power batteries.

[0048] In this embodiment, the control unit is capable of receiving information detected by the collision detection unit, so that the control unit can control the first protection switch unit and the second protection switch unit to disconnect when the vehicle collides. By controlling the disconnection of the first protection switch unit and the second protection switch unit, the purpose of disconnecting the high voltage can be achieved, thereby ensuring the safety of the vehicle after the collision. For example, timely disconnection of the vehicle's high voltage can prevent damage to the vehicle's power battery and cause an accident. In actual applications, the first protection switch unit and the second protection switch unit have different structures, and therefore the disconnection method and operation method of the first protection switch unit and the second protection switch unit are also different, resulting in different failure conditions of the first protection switch unit and the second protection switch unit. Therefore, if the first protection switch unit is facing a failure, the high voltage can be disconnected by the second protection switch unit, and if the second protection switch unit is facing a failure, the high voltage can be disconnected by the first protection switch unit. Therefore, in this embodiment, the simultaneous disconnection of the first protection switch unit and the second protection switch unit can provide dual protection. Such that if one protection switch unit cannot be disconnected, the purpose of disconnecting the high voltage can be achieved by disconnecting the other protection switch unit, thereby ensuring that the high voltage can be successfully disconnected in the event of a collision.

[0049] In one embodiment, the second protection switch unit is an intelligent fuse, wherein the intelligent fuse includes a gunpowder ignition part, a drive part and a cut-off part. When the control unit determines that the second protection switch unit needs to be controlled to be disconnected, the control unit sends a disconnection command to the second protection switch unit. When the intelligent fuse receives the disconnection command issued by the control unit, it ignites the inside of the gunpowder ignition part. When the inside of the gunpowder ignition part is ignited, a large pressure will be generated. The generated pressure can push the drive part to move quickly. During the movement of the drive part, the cut-off part can cut the copper bar back and forth and cut off the copper bar, thereby cutting off the high-voltage circuit and stopping the drive battery from supplying power to the vehicle end.

[0050] In one embodiment, the first protection switch unit is a high-voltage relay, comprising a main positive relay and a main negative relay. The main positive relay is connected in series with the second protection switch unit. The main positive relay is located on the positive side of the power battery. Specifically, one end of the second protection switch unit is connected to the positive output terminal of the power battery, and the other end of the second protection switch unit is connected to the main positive relay. The main positive relay can control the charging and discharging processes of the power battery. The main negative relay is connected in series with the negative terminal of the power battery to control the grounding of the negative terminal of the power battery, ensuring the safe operation of the battery pack.

[0051] In actual use, when the control circuits of the main positive and negative relays are energized, the coils of the main positive and negative relays are energized by the current, generating a magnetic field. This magnetic field magnetizes the iron cores in the main positive and negative relays, attracting the contacts and squeezing the springs between the contacts. This ultimately closes the contacts, connecting the main positive and negative relays and providing main power to the vehicle. In the event of a vehicle collision, the control unit can disconnect the power to the control circuit. This de-energizes the coils of the main positive and negative relays, dissipating the magnetic field and allowing the springs between the contacts to return to their original state, opening the contacts and disconnecting the main positive and negative relays. This disconnects the high-voltage circuit and stops the supply of high-voltage power to the vehicle.

[0052] In actual applications, the main positive relay and the main negative relay are prone to adhesion failure due to overcurrent and overheating, resulting in the main positive relay and the main negative relay being unable to disconnect in time, or requiring a long time to disconnect. In this case, the control unit can also control the second protection switch unit to disconnect, thereby also achieving the effect of disconnecting the high voltage.

[0053] In one embodiment, the collision detection unit includes a first collision detection unit and a second collision detection unit. The first collision detection unit includes a first collision sensor and an airbag controller. The first collision sensor can detect whether the vehicle has been involved in a collision and transmit collision information to the airbag controller. The airbag controller can control the deployment of the airbag based on the collision information. For example, the airbag controller controls the deployment of the airbag when the collision information determines that the vehicle has been involved in a collision, and controls the non-deployment of the airbag when the collision information determines that the vehicle has not been involved. In addition, when the first collision sensor detects a vehicle collision, the airbag controller can also transmit the collision information to the control unit via a controller area network (CAN) bus, so that the control unit controls the disconnection of the first and second protection switch units based on the collision information.

[0054] The second collision detection unit includes a second collision sensor, which can detect whether the vehicle has collided. When the second collision sensor detects that the vehicle has collided, it sends a collision signal to the control unit. The control unit can control the first protection switch unit and the second protection switch unit to disconnect according to the collision signal.

[0055] The control unit determines whether it is necessary to control the first protection switch unit and the second protection switch unit to be disconnected based on the collision situation of the vehicle. In this embodiment, the control unit can receive collision information sent by the airbag controller and can also receive collision signals sent by the second collision detection unit. When the control unit receives at least one of the collision information and the collision signal, it can determine that the vehicle has collided, and then control the first protection switch unit and the second protection switch unit to be disconnected.

[0056] In the above embodiment, the vehicle collision safety protection system is configured with a total of two protection switch units, which can simultaneously control the two protection switch units to be disconnected in the event of a vehicle collision. Therefore, if one of the protection switch units cannot be successfully disconnected, the high voltage can be cut off by disconnecting the other protection switch unit, thereby ensuring the safety of the vehicle.

[0057] The present disclosure also provides a vehicle equipped with a vehicle collision safety protection system.

[0058] The present disclosure also provides a vehicle collision safety protection method, which is applied to a vehicle, as shown in FIG3 , which shows a flow chart of a vehicle collision safety protection method, wherein the vehicle collision safety protection method includes the following steps:

[0059] Step S301: Detect whether the vehicle has collided.

[0060] Here, whether the vehicle has collided can be detected by a collision sensor on the vehicle. For example, a three-axis acceleration sensor can be used to detect changes in the real-time acceleration of the vehicle to detect whether the vehicle has collided.

[0061] Step S302: When a collision of the vehicle is detected, the second protection switch unit is controlled to be disconnected, and the first protection switch unit is controlled to be disconnected to perform double protection.

[0062] Here, the vehicle includes a first protection switch unit, a second protection switch unit and a power battery. A collision of the vehicle may easily cause the power battery of the vehicle to be squeezed or damaged, causing the power battery of the vehicle to cause a fire, etc., posing a threat to the safety of the vehicle. Based on this, when it is determined that a collision has occurred in the vehicle, the first protection switch unit is controlled to be disconnected and the second protection switch unit is controlled to be disconnected.

[0063] In actual applications, the structures of the first protection switch unit and the second protection switch unit are different, so the disconnection mode and operation method of the first protection switch unit and the second protection switch unit are also different, which leads to different failure conditions of the first protection switch unit and the second protection switch unit. Therefore, when the first protection switch unit is facing a failure, the high voltage can be disconnected by the second protection switch unit, and when the second protection switch unit is facing a failure, the high voltage can be disconnected by the first protection switch unit. Therefore, in this embodiment, the first protection switch unit and the second protection switch unit are controlled to be disconnected at the same time, and double protection can be performed. When one of the protection switch units cannot be disconnected, the purpose of disconnecting the high voltage can also be achieved by disconnecting the other protection switch unit, thereby ensuring that the vehicle can successfully disconnect the high voltage in the event of a collision.

[0064] It should be noted that the connection relationship between the first protection switch unit, the second protection switch unit, and the power battery is shown in the electrical schematic diagram of the vehicle collision safety protection system in Figure 2. Specifically, the first protection switch unit is provided in the high-voltage circuit of the power battery, and the second protection switch unit is connected in series with the positive output terminal of the power battery. The second protection switch unit is located inboard of the first protection switch unit. It should be noted that the position close to the power battery is referred to as the inboard position, and the position away from the power battery is referred to as the outboard position. In the electrical schematic diagram of Figure 2, the second protection switch unit is connected to the circuit closer to the power battery than the first protection switch unit.

[0065] In one embodiment, the second protective switch unit is a smart fuse, which includes a powder ignition unit, a drive unit, and a disconnection unit. Upon detecting a vehicle collision, a disconnection command is sent to the smart fuse. Upon receiving the disconnection command from the control unit, the smart fuse triggers an ignition signal, igniting the interior of the powder ignition unit in response to the ignition signal. The ignition of the interior of the powder ignition unit generates a high pressure, which can propel the drive unit to move rapidly. During this rapid movement, the disconnection unit can sever the copper bus, thereby severing the high-voltage circuit and stopping the drive battery from supplying power to the vehicle.

[0066] In one embodiment, the first protection switch unit is a high-voltage relay comprising a main positive relay and a main negative relay, and the second protection switch unit is an intelligent fuse comprising a powder ignition unit, a drive unit, and a disconnection unit. As shown in FIG2 , the main positive relay is connected in series with the second protection switch unit, while the main negative relay is connected in series with the negative terminal of the power battery. In actual use, when the control circuits of the main positive and negative relays are energized, the coils of the main positive and negative relays are energized by the current, generating a magnetic field. This magnetic field magnetizes the cores in the main positive and negative relays, attracting the contacts and compressing the springs between the contacts, ultimately closing the contacts and connecting the main positive and negative relays, providing high-voltage power to the vehicle. In the event of a vehicle collision, the control unit can disconnect the control circuit power supply, de-energizing the coils of the main positive and negative relays, dissipating the magnetic field, and allowing the springs between the contacts to return to their original state, opening the contacts. This disconnects the main positive and negative relays, disconnecting the high-voltage circuit and stopping the supply of high-voltage power to the vehicle.

[0067] In one embodiment, as shown in FIG4 , detecting whether a vehicle has collided includes:

[0068] Step S401: Detect whether the vehicle has collided by using a first collision sensor to receive collision information sent by an airbag controller connected to the first collision sensor, and detect whether the vehicle has collided by using a second collision sensor to receive a collision signal sent by the second collision sensor.

[0069] In this embodiment, a collision sensor is used to detect whether the vehicle has collided. The vehicle is equipped with two collision sensors. The operation of the two collision sensors will be described in detail below.

[0070] The first collision sensor can detect whether the vehicle has collided and transmit the collision information to the airbag controller. Upon receiving the collision information, the airbag controller controls the airbags based on the collision information. Specifically, if the airbag controller determines that the vehicle has collided based on the collision information, it controls the deployment of the airbags. In addition, the airbag controller can also send the collision information via the CAN bus, so that the control unit can control the disconnection of the first protection switch unit and the second protection switch unit based on the collision information.

[0071] The second collision sensor can also detect whether the vehicle has collided. The second collision sensor and the control unit are connected by a hard line. The second collision sensor can directly send a collision signal to the control unit, so that the control unit can control the disconnection of the first protection switch unit and the second protection switch unit according to the collision signal.

[0072] Therefore, in this embodiment, whether a vehicle has collided can be determined based on the collision information detected by the first collision sensor, and the collision signal detected by the second collision sensor can also be used to determine whether a vehicle has collided. The provision of two collision sensors can improve the accuracy of vehicle collision detection and prevent the power supply of a normally operating vehicle from being disconnected due to a detection error.

[0073] Step S402: determining whether a vehicle collision occurs based on at least one of the collision information and the collision signal.

[0074] Upon receiving collision information and a collision signal, a determination can be made as to whether the vehicle has collided based on at least one of the collision information and the collision signal. Specifically, if both the collision information and the collision signal indicate that the vehicle has collided, the vehicle is determined to have collided. If one of the collision information and the collision signal indicates that the vehicle has collided and the other indicates that the vehicle has not collided, the detection result can be re-acquired using the first collision sensor or the second collision sensor. In another feasible embodiment, if the collision information and the collision signal are different, the collision information detected by the first collision sensor can be used as the basis. This is because airbag control requires airbag deployment based on the collision information, and therefore the collision information detected by the first collision sensor can be considered to have higher accuracy.

[0075] In practical applications, after the high voltage is cut off by the first protection switch unit or the second protection switch unit, the collision fault of the vehicle may also be reported.

[0076] In one embodiment, as shown in FIG5 , FIG5 shows a flow chart of a vehicle collision safety protection method.

[0077] Step 1: Detecting a vehicle collision. Here, collision detection is performed using a first collision sensor and a second collision sensor to determine whether the vehicle has collided.

[0078] Step 2: Determine whether the first collision sensor detects a vehicle collision.

[0079] Step 3: Determine whether the second collision sensor detects a collision of the vehicle. If the second sensor detects a collision of the vehicle, execute steps 5 and 6.

[0080] Step 4: When the first collision sensor detects a collision of the vehicle, the collision information is sent to the BMS via the CAN bus.

[0081] Step 5: Control the second protection switch unit to be disconnected.

[0082] Step 6: Control the first protection switch unit to be disconnected.

[0083] In the above embodiment, when a collision of the vehicle is detected, the first protection switch unit is controlled to be disconnected, and the second protection switch unit is controlled to be disconnected. When one of the protection switch units fails, the high voltage can be cut off by the other protection switch unit, thereby providing double protection for the vehicle.

[0084] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device), or in conjunction with such an instruction execution system, apparatus, or device. For purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0085] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0086] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0088] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A vehicle collision safety protection system, comprising: A first protection switch unit, wherein the first protection switch unit is arranged in a high-voltage circuit of the power battery; A second protection switch unit, the second protection switch unit is connected in series to the positive electrode of the power battery; at least one collision detection unit, used to detect whether the vehicle has collided; A control unit is used to control the second protection switch unit to be disconnected and the first protection switch unit to be disconnected when the vehicle collides, so as to perform double protection.

2. The vehicle collision safety protection system according to claim 1, wherein: The second protection switch unit is an intelligent fuse, which includes a gunpowder ignition part, a drive part and a cut-off part. When receiving a disconnection command from the control unit, the intelligent fuse ignites the inside of the gunpowder ignition part to drive the drive part to move quickly so that the cut-off part cuts off the copper bar.

3. The vehicle collision safety protection system according to claim 1 or 2, wherein: The first protection switch unit comprises: a main positive relay, the main positive relay being connected in series with the second protection switch unit; A main negative relay, the main negative relay is connected in series to the negative electrode of the power battery; The control unit is further used to control the main positive relay and the main negative relay to be disconnected respectively when the vehicle collides, so as to disconnect the high-voltage circuit.

4. The vehicle collision safety protection system according to any one of claims 1 to 3, wherein: The collision detection unit includes a first collision detection unit and a second collision detection unit. The first collision detection unit includes a first collision sensor and an airbag controller. When the first collision sensor detects that the vehicle has collided, the airbag controller sends collision information to the control unit. The second collision detection unit includes a second collision sensor. When the second collision sensor detects that the vehicle has collided, it sends a collision signal to the control unit. The control unit determines that the vehicle has collided when receiving at least one of the collision information and the collision signal.

5. A vehicle, comprising the vehicle collision safety protection system according to any one of claims 1 to 4.

6. A vehicle collision safety protection method, the vehicle comprising a first protection switch unit, a power battery, and a second protection switch unit, the first protection switch unit being arranged in a high-voltage circuit of the power battery, the second protection switch unit being connected in series to a positive electrode of the power battery, wherein: The method comprises: detecting whether the vehicle has collided; When a collision of the vehicle is detected, the second protection switch unit is controlled to be disconnected, and the first protection switch unit is controlled to be disconnected, so as to perform double protection.

7. The vehicle collision safety protection method according to claim 6, wherein: The second protection switch is an intelligent fuse, which includes a gunpowder ignition unit, a driving unit, and a cutting unit, wherein controlling the second protection switch unit to be disconnected includes: An ignition signal is triggered, and the interior of the gunpowder ignition part is ignited according to the ignition signal to drive the driving part to move quickly so that the cutting part cuts off the copper bar.

8. The vehicle collision safety protection method according to claim 6 or 7, wherein: The first protection switch unit includes a main positive relay and a main negative relay, the main positive relay is connected in series with the second protection switch unit, and the main negative relay is connected in series to the negative electrode of the power battery, wherein controlling the first protection switch unit to be disconnected includes: The main positive relay and the main negative relay are controlled to be disconnected respectively to disconnect the high-voltage circuit.

9. The vehicle collision safety protection method according to any one of claims 6 to 8, wherein: Detecting whether the vehicle has collided, including: Detecting whether the vehicle has collided by a first collision sensor to receive collision information sent by an airbag controller connected to the first collision sensor, and detecting whether the vehicle has collided by a second collision sensor to receive a collision signal sent by the second collision sensor; It is determined whether the vehicle collides according to at least one of the collision information and the collision signal.

10. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method according to any one of claims 6 to 9.

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