CN210706905U - High-voltage power-off safety system of electric automobile - Google Patents
High-voltage power-off safety system of electric automobile Download PDFInfo
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- CN210706905U CN210706905U CN201921835183.3U CN201921835183U CN210706905U CN 210706905 U CN210706905 U CN 210706905U CN 201921835183 U CN201921835183 U CN 201921835183U CN 210706905 U CN210706905 U CN 210706905U
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Abstract
The application discloses electric automobile high voltage power failure safety coefficient compares with prior art, includes: the high-voltage relay is used for controlling the on-off of the power battery pack; the battery controller is connected with the high-voltage relay and is used for controlling the high-voltage relay to be opened and closed; a collision detection unit in signal connection with the battery controller for recognizing a collision of the vehicle; and the safety air bag controller is in signal connection with the battery controller and is used for identifying the triggering state of the safety air bag. The application provides an electric automobile high-voltage power-off safety system compares in prior art, can in time carry out the high-voltage power-off effectively when receiving comparatively serious collision, improves the accuracy that the car detected the collision, ensures driver and crew's safety.
Description
Technical Field
The application relates to the technical field of automobile speed switching control, in particular to a high-voltage power-off safety system of an electric automobile.
Background
With the development of science and technology, electric vehicles receive more and more attention from consumers, and at the same time, the safety of high-voltage power batteries, which is a core technology of electric vehicles, becomes more and more important. If the high voltage of the power battery of the electric automobile breaks down, the high voltage will cause life-threatening injuries to a driver and passengers, when the electric automobile is in a collision accident, the whole automobile state is not controlled, the possibility of high-voltage injury caused by insulation failure is very high, and a user puts forward stricter requirements on the reliability and the stability of the collision safety of the electric automobile when purchasing the electric automobile.
In the prior art, a high-voltage safety switch basically depends on an airbag sensor to detect whether collision occurs, when a vehicle is seriously collided, the airbag sensor transmits an airbag opening signal to a vehicle control unit, the vehicle control unit transmits a danger signal to a battery controller, the battery controller immediately sends a power-off instruction to a high-voltage relay, and meanwhile, the high-voltage relay performs disconnection operation on a high-voltage circuit. Because the CAN bus of the whole vehicle is damaged or overlong in the collision process, the battery management system and other control units of the whole vehicle cannot receive signals sent by the safety airbag or receive signals for delay, or the safety airbag is not opened at the collision speed and angle, so that the battery management unit and other control units of the whole vehicle cannot normally execute related safety protection strategies, the existing scheme is difficult to effectively power off in time, and certain potential safety hazards exist for drivers and passengers.
Therefore, how to provide a high-voltage power-off safety system for an electric vehicle, which can effectively perform high-voltage power-off in time when a severe collision occurs, improve the accuracy of collision detection of the vehicle, and ensure the safety of drivers and passengers, has become a technical problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the application provides an electric automobile high-voltage power-off safety system, can in time carry out high-voltage power-off effectively when receiving comparatively serious collision, improves the accuracy that the car detected the collision, ensures driver and crew's safety.
The technical scheme provided by the application is as follows:
the application provides an electric automobile high voltage power failure safety coefficient includes: the high-voltage relay is used for controlling the on-off of the power battery pack; the battery controller is connected with the high-voltage relay and is used for controlling the high-voltage relay to be opened and closed; a collision detection unit in signal connection with the battery controller for recognizing a collision of the vehicle; and the safety air bag controller is in signal connection with the battery controller and is used for identifying the triggering state of the safety air bag.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: the collision sensor is arranged on the automobile bumper and used for monitoring automobile collision in real time; the collision detection unit is used for reading the data of the collision sensor and identifying the collision of the automobile.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: the deformation sensor is arranged on the automobile frame and used for monitoring the deformation of the automobile frame in real time; and the collision detection unit is used for reading the data of the deformation sensor and identifying the automobile collision.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: the safety air bag sensor is arranged on the safety air bag and used for monitoring the state of the safety air bag in real time; the safety airbag controller is used for reading the data of the safety airbag sensor and identifying the triggering state of the safety airbag.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: the whole vehicle control unit is used for processing vehicle operation data; the whole vehicle control unit, the battery controller, the collision detection unit and the safety airbag controller are in signal connection.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: a CAN bus; the whole vehicle control unit, the battery controller, the collision detection unit and the safety airbag controller are connected through CAN bus signals.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: a wireless communication module; the whole vehicle control unit, the battery controller and the collision detection unit are provided with wireless communication modules; the whole vehicle control unit, the battery controller and the collision detection unit are in signal connection through a wireless communication module.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: the battery sensor is used for monitoring the working state of the power battery pack in real time; the battery sensor is in signal connection with the battery controller.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: the fusing module is used for cutting off a working circuit of the power battery pack; and the fusing module is in signal connection with the battery controller.
Further, in a preferred mode of the present invention, the electric vehicle high voltage power failure safety system further includes: and the manual power connection module is connected with the fusing module and the high-voltage relay in parallel and is used for manually connecting a working circuit of the power battery pack.
The utility model provides a pair of electric automobile high-voltage power failure safety coefficient compares with prior art, include: the high-voltage relay is used for controlling the on-off of the power battery pack; the battery controller is connected with the high-voltage relay and is used for controlling the high-voltage relay to be opened and closed; a collision detection unit in signal connection with the battery controller for recognizing a collision of the vehicle; and the safety air bag controller is in signal connection with the battery controller and is used for identifying the triggering state of the safety air bag. In the scheme that this application provided, battery controller controls high-voltage relay through receiving the trigger signal who discerns collision detecting element and air bag controller and carries out the break-make to the operating circuit of power battery group and handle to ensure that the vehicle can in time carry out high-voltage power off effectively when receiving comparatively serious collision, ensure driver and crew's safety, improve the accuracy that the car detected the collision incident, and then the security of car when improving the collision and taking place.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic signal connection diagram of a high-voltage power-off safety system of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power battery circuit connection of the high-voltage power-off safety system of the electric vehicle according to the embodiment of the present invention;
fig. 3 is a flowchart of an electric vehicle high-voltage power failure safety system provided by the embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
As shown in fig. 1 to fig. 3, the electric vehicle high voltage power failure safety system according to the embodiment of the present application includes: the high-voltage relay 1 is used for controlling the on-off of the power battery pack; the battery controller is connected with the high-voltage relay 1 and is used for controlling the on-off of the high-voltage relay 1; a collision detection unit in signal connection with the battery controller for recognizing a collision of the vehicle; and the safety air bag controller is in signal connection with the battery controller and is used for identifying the triggering state of the safety air bag.
The embodiment of the utility model provides an electric automobile high-voltage power failure safety coefficient specifically includes: the high-voltage relay 1 is used for controlling the on-off of the power battery pack; the battery controller 2 is connected with the high-voltage relay 1 and is used for controlling the on-off of the high-voltage relay 1; a collision detection unit 3 in signal connection with the battery controller 2 for recognizing a collision of the vehicle; and the safety air bag controller 4 is in signal connection with the battery controller 2 and is used for identifying the triggering state of the safety air bag. In the scheme that this application provided, battery controller 2 controls high-voltage relay 1 to carry out the break-make to the working circuit of power battery group through receiving the trigger signal who discerns collision detecting element 3 and air bag controller 4 to guarantee that the vehicle can in time carry out high-voltage power off effectively when receiving comparatively serious collision, guarantee driver and crew's safety, improve the accuracy that the car detected the collision incident, and then the security of car when improving the collision and taking place.
In the embodiment of the utility model, the new collision detection unit 3 is added to change the existing signal transmission mode, the airbag sensor control module and the collision detection unit 3 are used for transmitting signals to the battery controller 2 independently in two directions, and the vehicle controller 9 CAN carry out communication detection on the airbag control module and the collision detection unit 3 before the vehicle is started to ensure normal communication transmission, the airbag control module and the collision detection unit 3 transmit the collected signals (airbag sensor signals and collision sensor signals) to the battery controller 2 through the CAN bus and the wireless transmission mode, the transmission path which is transmitted to the battery controller 2 through the vehicle controller 9 is cancelled, the transmission efficiency is improved, the collision sensor design adopts the similar seismometer principle, fine vibration CAN be sensed sensitively, and the damage to the vehicle is determined by the collision detection unit 3, if there is the potential safety hazard, collision detecting element 3 battery controller 2 transmission instruction immediately, receive air bag control module or 3 arbitrary signal instructions of collision detecting element when battery controller 2, can send the outage instruction to high-voltage relay 1 switch immediately, can improve the accuracy that the car detected the collision incident, and then the security of car when improving the collision and taking place effectively avoids the vehicle that causes because of the collision to catch a fire or the emergence of electric leakage accident, effectively protects driver and crew's safety.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: a collision sensor 301 arranged on the bumper of the automobile and used for monitoring the collision of the automobile in real time; the collision detection unit 3 is configured to read data of the collision sensor 301 and identify an automobile collision.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: the deformation sensor is arranged on the automobile frame and used for monitoring the deformation of the automobile frame in real time; and the collision detection unit 3 is used for reading the data of the deformation sensor and identifying the automobile collision.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: an airbag sensor 401 arranged on the airbag and used for monitoring the state of the airbag in real time; the airbag controller 4 is configured to read data of the airbag sensor 401 and identify an airbag triggering state.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: the whole vehicle control unit is used for processing vehicle operation data; the whole vehicle control unit, the battery controller 2, the collision detection unit 3 and the safety airbag controller 4 are in signal connection.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: a CAN bus 5; the whole vehicle control unit, the battery controller 2, the collision detection unit 3 and the safety airbag controller 4 are in signal connection through a CAN bus 5.
In the embodiment, the vehicle control unit 9, the battery controller 2, the airbag controller 4, and the vehicle body collision detection unit 3 are connected by a CAN bus of the vehicle, and in addition, the vehicle control unit 9, the battery controller 2, and the power battery pack transmit information by a wireless transmission module. The airbag controller 4 and the airbag sensor 401 are connected by a wire, and the vehicle body collision detection unit 3, the collision sensor 301, and the strain sensor are connected by a wire.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: a wireless communication module 6; the whole vehicle control unit, the battery controller 2 and the collision detection unit 3 are provided with wireless communication modules 6; the whole vehicle control unit, the battery controller 2 and the collision detection unit 3 are in signal connection through a wireless communication module 6.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: the battery sensor is used for monitoring the working state of the power battery pack in real time; the battery sensor is in signal connection with the battery controller 2.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: the fusing module 7 is used for cutting off the working circuit of the power battery pack; the fusing module 7 is in signal connection with the battery controller 2.
In this embodiment, when the vehicle collides to cause that the high-voltage relay cannot normally control the working circuit of the power battery pack, the battery controller recognizes that the power battery pack works abnormally through data fed back by the battery sensor, and then controls the fusing module to directly disconnect the working circuit of the power battery pack.
Specifically, in the embodiment of the utility model provides an in, electric automobile high-voltage power failure safety coefficient still includes: and the manual power connection module 8 is connected with the fusing module 7 and the high-voltage relay 1 in parallel and used for manually connecting a working circuit of the power battery pack.
It should be noted that, when the battery controller controls the high-voltage relay or the fusing module to disconnect the working circuit of the power battery pack due to other faults of the vehicle, the vehicle needs to be started temporarily and forcibly, and then the standby working circuit of the power battery pack is connected through the manual power connection module 8, so that the vehicle can be driven to operate continuously.
More specifically, in the prior art, due to the fact that a complete vehicle CAN bus is damaged or too long in a collision process, a battery management system and other complete vehicle control units cannot receive signals sent by an airbag or receive signals delay, or due to the fact that the airbag is not opened at the collision speed and angle, a battery management unit and other complete vehicle control units cannot normally execute related safety protection strategies, power failure cannot be timely and effectively achieved, and safety of drivers and passengers is endangered.
The existing high-voltage safety switch basically depends on an airbag sensor 401 to detect whether collision occurs, but the airbag is opened only by needing a certain speed and a certain collision angle, a vehicle is seriously damaged in some collisions, but the airbag is not opened, so that the situation that the transmission mode of a collision signal acquisition mode is too single, a battery controller 2 and other vehicle control units only receive CAN signals sent by the airbag, and the battery controller 2 and other vehicle control units cannot receive signals sent by the airbag or delay receiving signals due to the damage or overlong of a vehicle CAN bus in the collision process, the battery controller 2 and other vehicle control units cannot normally execute related safety protection strategies, and the high-voltage power failure cannot be timely and effectively performed.
The embodiment of the utility model aims at the existing defects, the control module of the air bag sensor 401 and the collision detection unit 3 are used for independent and bidirectional signal transmission to the battery controller 2, and the vehicle controller 9 CAN carry out communication detection on the air bag control module and the collision detection unit 3 before the vehicle is started, so as to ensure normal communication transmission, the air bag control module and the collision detection unit 3 transmit the collected signals (air bag sensor signals and collision sensor 301 signals) to the battery controller 2 through the CAN bus 5 and a wireless transmission mode, and cancel the transmission path transmitted to the battery controller 2 through the vehicle controller 9, thereby improving the transmission efficiency, the collision sensor 301 adopts the similar seismograph principle, CAN sensitively sense the fine-perception vibration, comprehensively judge and confirm the collision to damage the vehicle through the collision detection unit 3, if the potential safety hazard exists, the collision detection unit 3 immediately transmits an instruction to the battery controller 2, and when the battery controller 2 receives any signal instruction of the safety airbag control module or the collision detection unit 3, the power-off instruction can be immediately sent to the switch of the high-voltage relay 1, so that the accuracy of the automobile for detecting a collision event can be improved, and the safety of the automobile when the collision occurs is further improved. The vehicle can be effectively prevented from being ignited or leaking electricity due to collision, and the safety of drivers and passengers is effectively protected.
The present invention will be further described in detail with reference to the accompanying drawings and embodiments, as shown in fig. 1, the present invention includes a vehicle control unit 9, a battery controller 2, a power battery pack, an airbag controller 4, an airbag sensor 401, a vehicle body collision detection unit 3, and a collision sensor 301. The vehicle controller 9, the battery controller 2, the airbag controller 4 and the vehicle body collision detection unit 3 are connected through a CAN bus of the vehicle. In addition, the information is conducted between the safety airbag controller 4 and the battery controller 2 through a CAN bus, the whole vehicle controller 9 transmits information between the battery controller 2 and the power battery pack through a wireless transmission module, and the safety airbag controller 4 is connected with the safety airbag sensor 401 through a lead. The vehicle body collision detection unit 3 and the collision sensor 301 are connected by a wire. Besides two connection modes of CAN bus connection and wire connection, the vehicle body collision detection unit 3, the battery controller 2 and the vehicle body controller are provided with wireless communication modules 6 for realizing wireless communication.
As shown in fig. 2, the battery controller 2 includes a power battery pack, a high-voltage relay 1 and an electrical load (i.e. power battery pack output), a normally open contact of the high-voltage relay 1 is connected with a driving output end of the battery management unit, and the on-off between the power battery pack and the electrical load can be controlled by controlling the on-off of the main loop relay.
As shown in fig. 3, the high-voltage power-off process is that when the current signal of the airbag sensor 401 is collected by the airbag controller 4, the signal is transmitted to the battery controller 2 through the CAN signal, or the collision sensor 301 collects the collision signal and transmits the signal to the collision detection unit 3, after the collision detection unit 3 comprehensively judges, if a potential safety hazard is caused to the vehicle, the signal is transmitted to the battery controller 2 through the wireless signal, and the battery controller 2 transmits the power-off command to the relay through the guide, thereby performing high-voltage power-off. The connection mode between each control device (vehicle control unit 9, battery controller 2, safety air bag controller 4, vehicle body collision detection unit 3, air bag sensor 301, relay) related to vehicle collision safety of the system is multiple, CAN bus, wire and wireless communication, any one of CAN signal and wireless communication signal is received by battery controller 2, passive safety protection function of vehicle CAN be realized, wire harness of vehicle is protected from being damaged, transmission of circuit signal is not influenced each other, possibility of vehicle ignition and electric leakage is avoided, and safety of vehicle is greatly improved. The collision detection unit 3 is under the condition that electric automobile takes place general collision, and electric automobile's power is cut off by the battery management unit at once, has prevented the further injury that whole car preshoot caused, and under the condition that does not take place serious damage, whole car can resume driving.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electric vehicle high-voltage power-off safety system, characterized by comprising:
the high-voltage relay is used for controlling the on-off of the power battery pack;
the battery controller is connected with the high-voltage relay and is used for controlling the high-voltage relay to be opened and closed;
a collision detection unit in signal connection with the battery controller for recognizing a collision of the vehicle;
and the safety air bag controller is in signal connection with the battery controller and is used for identifying the triggering state of the safety air bag.
2. The electric vehicle high voltage power off safety system of claim 1, further comprising: the collision sensor is arranged on the automobile bumper and used for monitoring automobile collision in real time; the collision detection unit is used for reading the data of the collision sensor and identifying the collision of the automobile.
3. The electric vehicle high-voltage power-off safety system according to claim 1 or 2, wherein the electric vehicle high-voltage power-off safety system further comprises: the deformation sensor is arranged on the automobile frame and used for monitoring the deformation of the automobile frame in real time; and the collision detection unit is used for reading the data of the deformation sensor and identifying the automobile collision.
4. The electric vehicle high voltage power off safety system of claim 3, further comprising: the safety air bag sensor is arranged on the safety air bag and used for monitoring the state of the safety air bag in real time; the safety airbag controller is used for reading the data of the safety airbag sensor and identifying the triggering state of the safety airbag.
5. The electric vehicle high voltage power off safety system of claim 4, wherein the electric vehicle high voltage power off safety system further comprises: the whole vehicle control unit is used for processing vehicle operation data; the whole vehicle control unit, the battery controller, the collision detection unit and the safety airbag controller are connected through signals.
6. The electric vehicle high voltage power off safety system of claim 5, further comprising: a CAN bus; the whole vehicle control unit, the battery controller, the collision detection unit and the safety airbag controller are connected through CAN bus signals.
7. The electric vehicle high voltage power off safety system of claim 6, further comprising: a wireless communication module; the whole vehicle control unit, the battery controller and the collision detection unit are provided with wireless communication modules; the whole vehicle control unit, the battery controller and the collision detection unit are in signal connection through a wireless communication module.
8. The electric vehicle high voltage power off safety system of claim 7, further comprising: the battery sensor is used for monitoring the working state of the power battery pack in real time; the battery sensor is in signal connection with the battery controller.
9. The electric vehicle high voltage power off safety system of claim 8, wherein the electric vehicle high voltage power off safety system further comprises: the fusing module is used for cutting off a working circuit of the power battery pack; and the fusing module is in signal connection with the battery controller.
10. The electric vehicle high voltage power off safety system of claim 9, further comprising: and the manual power connection module is connected with the fusing module and the high-voltage relay in parallel and is used for manually connecting a working circuit of the power battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921835183.3U CN210706905U (en) | 2019-10-29 | 2019-10-29 | High-voltage power-off safety system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921835183.3U CN210706905U (en) | 2019-10-29 | 2019-10-29 | High-voltage power-off safety system of electric automobile |
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| Publication Number | Publication Date |
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| CN210706905U true CN210706905U (en) | 2020-06-09 |
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| CN201921835183.3U Active CN210706905U (en) | 2019-10-29 | 2019-10-29 | High-voltage power-off safety system of electric automobile |
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| CN (1) | CN210706905U (en) |
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- 2019-10-29 CN CN201921835183.3U patent/CN210706905U/en active Active
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