New energy vehicle collision protection device and vehicle

Abstract

The utility model provides a new energy vehicle collision protection device and a vehicle. The device comprises a control module, a three-port protection circuit and a decoupling module, wherein the three-port protection circuit comprises a low-voltage input port, a first output port and a second output port; the low-voltage input port is electrically connected with the low-voltage battery; the control module is used for being in communication connection with a whole vehicle controller, receiving a vehicle state signal, controlling the three-port protection circuit to be in a second conduction state when the vehicle state signal corresponds to a collision state, and supplying power to the vehicle body control module through a second output port; otherwise, the three-port protection circuit is controlled to be in a first conduction state, and a second output port supplies power to the low-voltage load and the vehicle body control module; a decoupling module is connected between the vehicle body control module and the low-voltage load. When collision occurs, the influence of adhesion between the low-voltage load loops on the vehicle body control module is avoided, and meanwhile it is guaranteed that people rapidly escape.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicle safety control, and particularly to a new energy vehicle collision protection device and a vehicle. Background Art

[0002] Regarding the serious problem of new energy vehicles catching fire after a collision, it not only causes irreparable damage to the lives and property safety of new energy vehicle users, but may also cause psychological trauma, which is extremely unfavorable to the rapid development of the new energy vehicle industry. Although existing new energy vehicles have a high-voltage active discharge function and there are fuses at the low-voltage harness end for protection, they still cannot effectively protect the vehicle in an extreme collision state and completely prevent fire incidents from occurring. Currently, low-voltage load protection mainly relies on the combination of master and slave fuses. Among them, the master fuse is responsible for protecting the main line, while the slave fuse is used for protecting individual lines of the branch line.

[0003] In the process of implementing the embodiments of this application, it is found that there are at least the following technical problems in the related art:

[0004] In the combination of master and slave fuses, after a vehicle collision, if the master and slave lines are stuck together or the master fuse blows, it may cause the vehicle to catch fire and the doors cannot be opened, thus preventing users from escaping in time. Summary of the Utility Model

[0005] The embodiments of this application provide a new energy vehicle collision protection device and a vehicle to solve the problem that the combination of master and slave fuses poses a risk of preventing users from escaping in time after a vehicle collision.

[0006] In a first aspect, the embodiments of this application provide a new energy vehicle collision protection device, including: a control module, a three-port protection circuit, and a decoupling module;

[0007] Among them, the three-port protection circuit includes a low-voltage input port, a first output port, and a second output port; the low-voltage input port is electrically connected to a low-voltage battery; the first output port is electrically connected to a low-voltage load; the second output port is electrically connected to a body control module; a decoupling module is connected between the body control module and the low-voltage load;

[0008] The control module is used to communicate with a vehicle controller, receive vehicle status signals, and control the conduction state of the three-port protection circuit according to the vehicle status signals; the conduction state includes a first conduction state and a second conduction state;

[0009] The control module is specifically configured to control the three-port protection circuit to be in the second conduction state when the vehicle status signal corresponds to a collision state, and supply power to the body control module through the second output port; otherwise, control the three-port protection circuit to be in the first conduction state, and supply power to the low-voltage load and the body control module through the first output port.

[0010] In a possible implementation manner, the three-port protection circuit further includes: a first MOS power tube connected between the low-voltage input port and the first output port, and a second MOS power tube connected between the low-voltage input port and the second output port.

[0011] In a possible implementation manner, the three-port protection circuit further includes: a first relay switch circuit connected between the low-voltage input port and the first output port, and a second relay switch circuit connected between the low-voltage input port and the second output port.

[0012] Among them, the main functions of the MOS power tube and the relay switch circuit are to realize current control and protection in the circuit. When receiving the instruction of the control signal, it can quickly respond and realize the conduction state switching of the three-port protection circuit.

[0013] In a possible implementation manner, the decoupling module is a decoupling switch tube, a decoupling diode, a decoupling inductor or a decoupling capacitor.

[0014] Among them, the decoupling module is designed to effectively isolate the electrical connection between the low-voltage load and the body control module. Ensure that the door can be opened smoothly and the user can escape safely during a collision, effectively reducing the potential threat to the safety of occupants caused by the fire triggered by the collision of new energy vehicles.

[0015] In a possible implementation manner, the low-voltage input port is further configured to be connected to a DCDC converter and connected to a high-voltage battery through the DCDC converter.

[0016] Among them, the DCDC converter is electrically connected to the high-voltage battery and is used to convert the voltage provided by the high-voltage battery into a low voltage and supply power to the low-voltage load and the body control module through the three-port protection circuit.

[0017] In a possible implementation manner, the control module is communicatively connected to the vehicle controller through wireless communication and / or CAN communication.

[0018] Among them, the wireless communication and CAN communication are used to ensure that the control module can receive the vehicle status information sent by the VCU.

[0019] In a possible implementation manner, the control module is an e-fuse chip.

[0020] Among them, when the e-fuse chip is used in the collision protection device of a new energy vehicle, it can effectively monitor the abnormal conditions of all circuits and perform cut-off and recovery processing in a timely and effective manner.

[0021] In a possible implementation manner, the collision protection device of the new energy vehicle further includes: a current detection module, configured to detect the output current of the low-voltage load;

[0022] The control module is further configured to control the three-port protection circuit to be in the second conduction state when the output current of the low-voltage load meets the set conditions, and supply power to the body control module by the second output port; otherwise, control the three-port protection circuit to be in the first conduction state, and supply power to the low-voltage load and the body control module by the first output port.

[0023] In a possible implementation manner, the set conditions include:

[0024] The time when the output current exceeds the set current threshold is greater than or equal to the first set time, and / or the number of times the output current exceeds the set current threshold within the second set time is greater than or equal to the set number of times;

[0025] Among them, the second set time is greater than the first set time.

[0026] In a second aspect, an embodiment of the present application provides a vehicle, including the collision protection device of the new energy vehicle, a low-voltage battery, a low-voltage load, a body controller, an airbag, an airbag system, and a vehicle controller as described in the first aspect or any possible implementation manner of the first aspect above;

[0027] Among them, the airbag system is used to detect the state of the airbag;

[0028] The vehicle controller is configured to transmit the state of the airbag to the control module of the collision protection device of the new energy vehicle.

[0029] The embodiment of the present application provides a collision protection device for new energy vehicles and a vehicle. The collision protection device for new energy vehicles is composed of a control module, a three-port protection circuit, and a decoupling module. Among them, the control module independently set and communicatively connected to the vehicle controller improves the control efficiency of the three-port protection circuit. The control module is responsible for controlling the three-port protection circuit to switch between the first conduction state and the second conduction state. In the first conduction state, the first output port supplies power to the low-voltage load and the body controller to ensure the normal operation of the low-voltage load and the body controller under normal circumstances. When the vehicle status signal corresponds to the collision state, it switches to the second conduction state. At this time, the current output of the first output port is cut off, and the second output port supplies power to the body control module, and the door is allowed to be safely opened in the collision state so that users can quickly escape. In addition, the body control module and the low-voltage load are connected through a decoupling module, realizing the isolation between the body control module and the low-voltage load, thereby avoiding the influence of the adhesion between the low-voltage load circuits on the body control module when the second output port supplies power to the body control module. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is an application scenario diagram of the collision protection device for new energy vehicles provided by an embodiment of the present application;

[0032] Figure 2 is an application scenario diagram of the collision protection device for new energy vehicles provided by another embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of the three-port protection circuit provided by an embodiment of the present application. Detailed Embodiments

[0034] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are presented in order to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0035] In the description and claims of the embodiments of the present application and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0036] Unless otherwise specified, the term "plurality" means two or more. The character " / " means that the objects before and after are in an "or" relationship. For example, A / B means: A or B. The term "and / or" is a description of the association relationship of an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0037] The terms used in the present application are only used to describe the embodiments and do not limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Similarly, as used in the present application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groupings of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method or device comprising the element.

[0038] In the present application, each embodiment may focus on the differences from other embodiments, and the same or similar parts between the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, the relevant parts may refer to the description of the method part.

[0039] To make the objectives, technical solutions and advantages of the present application clearer, the following will be described through specific embodiments in conjunction with the drawings.

[0040] Figure 1 It is an application scenario diagram of a new energy vehicle collision protection device provided by an embodiment of the present application. As Figure 1As shown in the figure, it includes: a new energy vehicle collision protection device 10, a low-voltage battery 11, a body control module 12 (Body Control Module, BCM), a car door 13, a low-voltage load 14, a vehicle control unit 15 (vehicle control unit, VCU), an airbag module 16 (Air Bag Module, ABM), and an airbag 17. Figure 1 The red solid line in the figure is the low-voltage circuit, and the black dashed line is the communication circuit.

[0041] Among them, the new energy vehicle collision protection device 10 includes: a control module 101, a three-port protection circuit 102, and a decoupling module. A decoupling module is connected between the BCM 12 and the low-voltage load 14 to ensure single-phase current transmission between the low-voltage load 14 and the BCM 12 side.

[0042] In the specific implementation process, the low-voltage load 14 includes loads such as vehicle lights, in-vehicle indicator lights, and control panels other than the BCM 12. In addition to connecting the car door 13, the BCM 12 is also used to connect warning devices such as warning lights and buzzers to give danger warnings, reminding occupants and other people to stay away from the scene to avoid unnecessary injuries and losses. Among them, the number of devices connected to the BCM 12 should not be too many to avoid excessive power. When a collision occurs, the power supply of the low-voltage battery 11 is insufficient, affecting the smooth opening of the car door 13.

[0043] In the embodiment of the present application, separating the low-voltage load 14 from the BCM 12 aims to ensure the independent operation of the BCM 12 and the smooth opening of the car door 13 in case of an emergency. Optionally, the low-voltage load 14 includes different types of loads, and different loads are connected in parallel or in series, which is not specifically limited in this solution.

[0044] In addition, the three-port protection circuit 102 includes a low-voltage input port ( Figure 1 12V power supply in the figure), a first output port ( Figure 1 Out_1 in the figure), and a second output port ( Figure 1 Out_2 in the figure). The low-voltage input port is electrically connected to the low-voltage battery 11, the first output port is electrically connected to the low-voltage load 14, and the second output port is electrically connected to the BCM 12.

[0045] The control module 101 is used to communicate with the VCU 15, receive vehicle status signals, and control the conduction state of the three-port protection circuit 102 according to the vehicle status signals. The conduction states include a first conduction state and a second conduction state.

[0046] The control module 101 is specifically configured to control the three-port protection circuit 102 to be in the second conduction state when the vehicle status signal corresponds to a collision state, and supply power to the BCM 12 through the second output port; otherwise, control the three-port protection circuit 102 to be in the first conduction state, and supply power to the low-voltage load 14 and the BCM 12 through the first output port.

[0047] In the illustrated embodiment, the control module 101 receives a vehicle status signal sent by the VCU 15 as a collision signal, and this collision signal is obtained by the ABM 16 detecting the status of the airbag 17. In other possible embodiments, the vehicle status signal received by the control module 101 from the VCU 15 can be collected by other devices, such as a combination of one or more signals detected by a speed sensor, a collision sensor, a current sensor, etc. to form the vehicle status signal. Specifically, it can be determined according to the configuration of the vehicle sensors to improve the applicability of the solution.

[0048] Among them, the low-voltage input port is electrically connected to the low-voltage battery 11 to meet the low-voltage power consumption requirements of the low-voltage load 14 and the BCM 12. The conduction states of the three-port protection circuit 102 are divided into a first conduction state and a second conduction state. Under normal operating conditions, the first output port remains conductive, while the second output port is in a disconnected state, ensuring that the low-voltage load 14 and the BCM 12 can obtain power supply from the first output port simultaneously. In an emergency, such as when a collision occurs, the system will control the first output port to disconnect, and at the same time the second output port becomes conductive. Due to the single-phase conduction characteristic of the decoupling module, the second output port only supplies power to the BCM 12, thereby preventing electrical adhesion between the BCM 12 and the low-voltage load 14 side. The connection method of the decoupling module between the BCM 12 and the low-voltage load 14 ensures that the door 13 can be opened smoothly and the user can escape safely during a collision, effectively reducing the potential threat to the safety of vehicle occupants caused by a fire triggered by a collision of a new energy vehicle.

[0049] In this embodiment, a new energy vehicle collision protection device 10 is composed of a control module 101, a three-port protection circuit 102 and a decoupling module. Among them, the control module 101, which is independently set and communicatively connected to the VCU 15, improves the control efficiency of the three-port protection circuit 102. The control module 101 is responsible for controlling the three-port protection circuit 102 to switch between a first conduction state and a second conduction state. In the first conduction state, the first output port supplies power to the low-voltage load 14 and the BCM 12 to ensure the normal operation of the low-voltage load 14 and the BCM 12 under normal circumstances. When the vehicle status signal corresponds to a collision state, it switches to the second conduction state. At this time, the current output of the first output port is cut off, and the second output port supplies power to the BCM 12, and the door 13 is allowed to open safely in the collision state so that the user can escape quickly. In addition, the BCM 12 and the low-voltage load 14 are connected through a decoupling module, realizing the isolation between the BCM 12 and the low-voltage load 14, avoiding mutual interference between the low-voltage load 14 and the BCM 12, and thus avoiding the influence of the adhesion between the low-voltage load 14 loops on the BCM 12 when the second output port supplies power to the BCM 12.

[0050] Figure 1 As shown, the low-voltage load 14 of the new energy vehicle collision protection device 10 is powered by the low-voltage battery 11, and the power supply method is single. Figure 2 It is an application scenario diagram of the new energy vehicle collision protection device provided by another embodiment of the present application. As Figure 2 shown, it includes: a new energy vehicle collision protection device 10, a low-voltage battery 11, a BCM 12, a door 13, a low-voltage load 14, a high-voltage battery 21, a DCDC converter 22, a microcontroller unit 23 (Microcontroller Unit, MCU), a motor 24, a VCU 15, an ABM 16 and an airbag 17.

[0051] Figure 2 The application scenario diagram shown, compared with Figure 1 shown, the difference is that the low-voltage input port is also configured to be connected to the DCDC converter 22 and connected to the high-voltage battery 21 through the DCDC converter 22. Figure 1 In the figure, the red solid line is the low-voltage circuit, the black dashed line is the communication circuit, and the yellow solid line is the high-voltage circuit.

[0052] Among them, the DCDC converter 22 is electrically connected to the high-voltage battery 21 and the MCU 23 respectively. Figure 2 Illustrated by an exemplary embodiment, in the actual implementation process, the high-voltage battery 21 is also used to supply power to other high-voltage loads (such as the motor 24 and the MCU 23, etc.).

[0053] In this embodiment, the low voltage input port is electrically connected to the high voltage battery 21 through the DCDC converter 22, and the DCDC converter 22 is used to convert the voltage provided by the high voltage battery 21 into a low voltage, and to supply power to the low voltage load 14 and the BCM 12 through the three-port protection circuit 102. When the low voltage battery 11 is low in power or damaged, the low voltage load 14 and the BCM 12 can also draw power from the high voltage battery 21 to ensure the normal operation of the low voltage load 14 and the BCM 12.

[0054] Furthermore, a filter capacitor is also included between the high-voltage load and the DCDC converter 22 to ensure the stability of the power supply to the high-voltage load. In addition, when the new energy vehicle encounters a collision accident and the high-voltage battery 21 and the low-voltage battery 11 fail at the same time, the remaining electric energy stored in the filter capacitors on the high-voltage load side can be used to provide short-term power support for the BCM 12. In this way, the BCM 12 can delay power-off and ensure that the door 13 is automatically unlocked during this period.

[0055] The above embodiment only illustrates that the control module 101 can control the conduction state of the three-port protection circuit 102 . In the real-time implementation process, different control units exist to ensure timely response to the control of the control module 101 .

[0056] Figure 3 1 is a schematic diagram of the structure of a three-port protection circuit provided in an embodiment of the present application. In a possible implementation, the three-port protection circuit 102 further includes: a first MOS power tube (such as Figure 3 IGBT1), and a second MOS power tube (such as Figure 3 IGBT2).

[0057] In this embodiment, the main function of the MOS power tube is to realize current control and protection in the circuit. When receiving the instruction of the control signal, the MOS power tube can respond quickly to realize the conduction state switching of the three-port protection circuit 102. Among them, based on the characteristics of the MOS power tube that responds quickly and has no mechanical parts, it not only improves the efficiency of the conduction state switching of the three-port protection circuit 102, but also enhances the stability of the three-port protection circuit 102.

[0058] In another possible implementation, the three-port protection circuit 102 further includes: a first relay switch circuit connected between the low voltage input port and the first output port, and a second relay switch circuit connected between the low voltage input port and the second output port.

[0059] In this embodiment, the main function of the relay switch circuit is to achieve current control and protection in the circuit. When receiving the instruction of the control signal, it can respond quickly and complete the conduction state switching of the three-port protection circuit 102. In addition, the relay switch circuit helps to reduce the cost of the new energy vehicle collision protection device 10.

[0060] In addition, the decoupling module in the foregoing embodiment has various forms in different embodiments. Optionally, the decoupling module is a decoupling switch tube, a decoupling diode, a decoupling inductor or a decoupling capacitor.

[0061] Among them, the decoupling switch tube can achieve the effect of fast switching. The decoupling diode can effectively control the current direction by using its unidirectional conduction characteristic. The decoupling inductor and the decoupling capacitor respectively achieve the decoupling function by storing and releasing magnetic field energy or electric field energy, which can not only meet the decoupling requirements, but also play a role in smoothing the current or voltage fluctuation in the circuit. In the actual implementation process, any one of the forms of the decoupling module can be selected to meet the structural requirements between the low-voltage load 14 and the BCM 12.

[0062] In this embodiment, the decoupling switch tube, the decoupling diode, the decoupling inductor and the decoupling capacitor each have unique electrical characteristics and can play a decoupling role in the circuit, thus effectively isolating the electrical connection between the low-voltage load 14 and the BCM 12. Ensure that when a collision occurs, the door 13 can be opened smoothly and the user can escape safely, effectively reducing the potential threat to the safety of the occupants caused by the fire triggered by the collision of the new energy vehicle.

[0063] In different embodiments, to ensure that the control module 101 can receive the vehicle status information sent by the VCU 15, the control module 101 and the VCU 15 are connected in different ways.

[0064] In a possible implementation manner, the control module 101 is communicatively connected to the VCU 15 through a wireless communication method. Optionally, the control module 101 and the VCU 15 are communicatively connected through a Bluetooth, wifi or XingFlash wireless communication method.

[0065] In this embodiment, the control module 101 establishes a connection with the VCU 15 through a wireless communication method, ensuring that the information transmission is not restricted by the wired connection method and reducing the wiring cost.

[0066] In another possible implementation manner, the control module 101 is communicatively connected to the VCU 15 through a CAN communication method.

[0067] In this embodiment, the control module 101 is communicatively connected to the VCU 15 through a CAN communication method, improving the stability and efficiency of information transmission and avoiding the situation where the vehicle cannot respond in time when a collision occurs in a place with weak signals.

[0068] In other possible implementation manners, the control module 101 is communicatively connected to the VCU 15 through wireless communication and CAN communication.

[0069] In this embodiment, the wireless communication and CAN communication are backups for each other, so as to improve the success rate of communication between the control module 101 and the VCU 15 when the vehicle collides.

[0070] In a possible implementation manner, the control module 101 is an e-fuse chip.

[0071] The e-Fuse has an ultra-fast operation speed, excellent accuracy, reliability, and reusability. The e-Fuse has excellent performance and high flexibility. It not only becomes a substitute for traditional fuses and PPTC devices, but also has a variety of built-in functions, which can greatly simplify the design work of circuit and user protection.

[0072] In this embodiment, using the e-fuse chip in the new energy vehicle collision protection device 10 can effectively monitor the abnormal conditions of all circuits and perform cut-off and recovery processing in a timely and effective manner.

[0073] In a specific embodiment, the specific model of the E-Fuse chip selected is VNF1048F.

[0074] The above introduced the new energy vehicle collision protection device 10 and its working principle. In the actual production process, the new energy vehicle collision protection device 10 can be adapted to different vehicle models, and only the wiring methods of the low-voltage battery 11, high-voltage battery 21, low-voltage load 14, and BCM 12 need to be changed to complete.

[0075] In a possible implementation manner, the new energy vehicle collision protection device 10 further includes: a current detection module, configured to detect the output current of the low-voltage load 14;

[0076] The control module 101 is further configured to control the three-port protection circuit 102 to be in the second conduction state to supply power to the BCM 12 through the second output port when the output current of the low-voltage load 14 meets the set conditions; otherwise, control the three-port protection circuit 102 to be in the first conduction state to supply power to the low-voltage load 14 and the BCM 12 through the first output port.

[0077] In a possible implementation manner, the set conditions include:

[0078] The time when the output current exceeds the set current threshold is greater than or equal to the first set time, and / or the number of times the output current exceeds the set current threshold within the second set time is greater than or equal to the set number of times;

[0079] Among them, the second set time is greater than the first set time.

[0080] In the actual implementation process, the current threshold is calibrated according to different vehicle models and different states of the vehicle.

[0081] Specifically, during the vehicle startup process, when the electronically controlled brake system (EBS) performs a braking operation or the vehicle's headlights are turned on, the current of the low-voltage load 14 will exceed the pre-set current threshold within a very short period of time, about a few milliseconds. The occurrence of this situation does not mean that any faults or collisions have occurred to the vehicle. It is just a normal electrical response. In this case, the situation where the current of the low-voltage load 14 exceeds the set current threshold for a short period of a few milliseconds is determined that the vehicle is still in a safe state and no collision event has occurred.

[0082] In addition, during night driving, once the vehicle starts, the primary task is to ensure that the headlights are turned on to improve the visibility of the vehicle and ensure driving safety. Additionally, in situations with low visibility, such as when there is thick fog, light rain, or when driving on an empty road, just turning on the ordinary headlights may not be sufficient to ensure safety. In this case, the driver should also turn on the high beams to illuminate the road over a longer distance and detect potential obstacles or dangers in advance.

[0083] Based on the above description, after the vehicle starts, the user will perform the operations of turning on the headlights and the high beams within a certain period of time. This will result in the situation where the output current exceeds the set current threshold multiple times continuously within a period of time. Therefore, in addition to the judgment conditions for the set time when the calibrated current exceeds the threshold corresponding to the vehicle startup and EBS braking, it is also necessary to limit the time when the current exceeds the set current threshold multiple times, and the duration corresponding to this set value is greater than the first set time.

[0084] Optionally, the first set value is 5 ms to 10 ms; the second set value is 50 ms to 2 s.

[0085] In this embodiment, a judgment threshold is set for the time when the output current exceeds the set current threshold, and the number of times the current exceeds the set current threshold and the time when the output current exceeds the set current threshold multiple times are set, which improves the control accuracy. It ensures that during the normal operation of the vehicle, even if there are short-term current fluctuations, it will not be misjudged as a fault or collision, thus avoiding unnecessary interventions and operations and ensuring the stability of the vehicle and driving safety.

[0086] In another possible implementation, the control module 101 is configured to power the BCM 12 from the second output port when the airbag deployment status signal is obtained; otherwise, control the three-port protection circuit 102 to be in the first conduction state, and power the low-voltage load 14 and the BCM 12 from the first output port.

[0087] In other possible implementations, the control module 101 is configured to comprehensively control the state switching of the three-port protection circuit 102 based on the airbag deployment status signal and the output current of the low-voltage load 14. When the airbag deployment status signal is obtained or the output current of the low-voltage load 14 meets the set conditions, power the BCM 12 from the second output port; otherwise, control the three-port protection circuit 102 to be in the first conduction state, and power the low-voltage load 14 and the BCM 12 from the first output port.

[0088] In this embodiment, when any one of the collision signal or the output current information meets the set conditions, that is, when it is determined that the vehicle has collided according to the collision signal or the output current information, there is a risk of fire, and it is necessary to quickly unlock the door 13 to facilitate the occupants to open the door 13 and escape smoothly, avoiding unnecessary injuries and losses.

[0089] The embodiment of the present application further provides a vehicle, which includes the aforementioned new energy vehicle collision protection device 10, low-voltage battery 11, low-voltage load 14, BCM 12, airbag 17, airbag system, and VCU 15;

[0090] Wherein, the airbag system is used to detect the state of the airbag 17;

[0091] The VCU 15 is configured to transmit the state of the airbag 17 to the control module 101 of the new energy vehicle collision protection device 10.

[0092] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A collision protection device for a new energy vehicle, characterized in that: include: Control module, three-port protection circuit and decoupling module; Wherein, the three-port protection circuit includes a low-voltage input port, a first output port and a second output port; the low-voltage input port is electrically connected to a low-voltage battery; the first output port is electrically connected to a low-voltage load; the second output port is electrically connected to a body control module; a decoupling module is connected between the body control module and the low-voltage load; The control module is used to communicate with the vehicle controller, receive a vehicle status signal, and control the conduction state of the three-port protection circuit according to the vehicle status signal; the conduction state includes a first conduction state and a second conduction state; The control module is specifically used to control the three-port protection circuit to the second conduction state when the vehicle status signal corresponds to a collision state, and the second output port is used to power the body control module; otherwise, the three-port protection circuit is controlled to the first conduction state, and the first output port is used to power the low-voltage load and the body control module.

2. The new energy vehicle collision protection device according to claim 1, characterized in that: The three-port protection circuit further includes: a first MOS power tube connected between the low-voltage input port and the first output port, and a second MOS power tube connected between the low-voltage input port and the second output port.

3. The new energy vehicle collision protection device according to claim 1, characterized in that: The three-port protection circuit further includes: A first relay switch circuit is connected between the low voltage input port and the first output port, and a second relay switch circuit is connected between the low voltage input port and the second output port.

4. The new energy vehicle collision protection device according to claim 1, characterized in that: The decoupling module is a decoupling switch tube, a decoupling diode, a decoupling inductor or a decoupling capacitor.

5. The new energy vehicle collision protection device according to claim 1, characterized in that: The low voltage input port is also configured to be connected to a DCDC converter; and connected to a high voltage battery through the DCDC converter.

6. The new energy vehicle collision protection device according to claim 1, characterized in that: The control module is connected to the vehicle controller via wireless communication and / or CAN communication.

7. The new energy vehicle collision protection device according to claim 1, characterized in that: The control module is an e-fuse chip.

8. The new energy vehicle collision protection device according to claim 1, characterized in that: The new energy vehicle collision protection device further includes: a current detection module for detecting the output current of the low-voltage load; The control module is also used to control the three-port protection circuit to the second conduction state when the output current of the low-voltage load meets the set conditions, and the second output port is used to power the body control module; otherwise, the three-port protection circuit is controlled to the first conduction state, and the first output port is used to power the low-voltage load and the body control module.

9. The new energy vehicle collision protection device according to claim 8, characterized in that: The setting conditions include: The time for which the output current exceeds the set current threshold is greater than or equal to a first set time, and / or the number of times the output current exceeds the set current threshold within a second set time is greater than or equal to a set number; The second set time is greater than the first set time.

10. A vehicle, comprising the new energy vehicle collision protection device as described in any one of claims 1 to 9, a low-voltage battery, a low-voltage load, a body controller, an airbag, an airbag system and a vehicle controller; in, The airbag system is used to detect the state of the airbag; The vehicle controller is used to transmit the status of the airbag to the control module of the collision protection device of the new energy vehicle.

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