CN111806238A - Power-off protection device for vehicle and vehicle - Google Patents
Power-off protection device for vehicle and vehicle Download PDFInfo
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- CN111806238A CN111806238A CN202010647332.4A CN202010647332A CN111806238A CN 111806238 A CN111806238 A CN 111806238A CN 202010647332 A CN202010647332 A CN 202010647332A CN 111806238 A CN111806238 A CN 111806238A
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- 238000001514 detection method Methods 0.000 claims abstract description 42
- 230000002159 abnormal effect Effects 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 description 11
- 230000005611 electricity Effects 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- 230000002441 reversible effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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- Life Sciences & Earth Sciences (AREA)
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the field of electric vehicles, in particular to safety protection of high-voltage electric connection of an electric vehicle. The present invention proposes a power-off protection device for a vehicle including a battery for providing driving force for the vehicle and a high-voltage apparatus forming a high-voltage electrical connection with the battery, wherein the power-off protection device is configured to be capable of automatically disconnecting a high-voltage electrical connection line between the high-voltage apparatus and the battery upon detection of an abnormal condition of the vehicle, wherein the power-off protection device includes: at least one switching element arranged to be electrically connectable to a battery at one end and to a high voltage device at the other end; a control unit configured to automatically control the switching element to be turned off to disconnect the high-voltage electrical connection between the high-voltage device and the battery, according to a detection signal indicating an abnormal condition of the vehicle. The invention also relates to a vehicle. The invention can improve the safety of the high-voltage line of the vehicle and the layout flexibility of the battery and/or the high-voltage equipment.
Description
Technical Field
The present invention relates to a power-off protection device for a vehicle and a vehicle.
Background
Automotive vehicles are common vehicles. The reduction of pollution and energy saving in motor vehicles has become a problem of great concern due to the worldwide energy crisis and the atmospheric pollution caused by exhaust emissions. Electric vehicles are becoming more and more widely used due to their low noise, low energy consumption, no pollution, and freedom from fuel shortage. Electric vehicles may include hybrid vehicles and electric-only vehicles.
In general, in an electric vehicle, a dc voltage of 60V or less is a low voltage, and a dc voltage of more than 60V is a high voltage. In an electric vehicle, a battery is electrically connected to a high voltage device on the vehicle that carries high voltage. When an abnormal condition of the electric vehicle, such as an accidental collision, occurs, if the high-voltage electrical connection between the battery and the high-voltage device is still maintained, it is easy to cause fire and accidental injury to personnel of the electric vehicle.
In the prior art, methods have been proposed to improve the safety of the high-voltage lines of electric vehicles.
CN202782736U discloses a power control device installed on a pure electric sanitation vehicle, which includes a power supply, a high-voltage loop fuse, a high-voltage relay, an inverter connected with the power supply, a vehicle control power supply, a control loop fuse, a control loop power switch, and oil-way electromagnetic valves for controlling various actions, wherein the control power circuit of each oil-way electromagnetic valve is respectively connected with its own control key switch in series, the connection point of each control key switch and each oil-way electromagnetic valve is connected with the enable signal end of the linkage electromagnetic valve and the inverter through its own isolation diode, and the other end of the linkage electromagnetic valve is grounded. The coil of the high-voltage relay is powered by the whole vehicle control power supply, the control loop power switch is connected with the coil of the high-voltage relay in series, and the contact of the high-voltage relay is connected in series in a loop of the power supply for supplying power to the inverter. The voltage grade of the power supply exceeds the human body safety voltage range, and the high-voltage circuit is controlled by the low-voltage circuit of the whole vehicle, so that personnel can not contact the high-voltage circuit part in the installation, maintenance and operation processes, and the safety is improved.
CN209311572U discloses an injection signal-based insulation resistance detection system for an electric vehicle, in which an injection signal generation circuit generates a detection signal to provide a detection signal for insulation resistance detection when a high-voltage battery pack supplies power; the injection circuit is used for injecting a detection signal into the detection circuit and isolating the detection signal from the high-voltage battery pack, so that the safety and reliability of the detection circuit are ensured; the signal sampling circuit is used for sampling the signal injected into the detection circuit and providing a detection signal for the alternating current signal detection peak value detection circuit; the alternating current signal peak value detection circuit is used for detecting the peak value of a detection signal provided by the sampling circuit; the MCU circuit is used for carrying out A/D processing on an output signal of the alternating current signal peak value detection circuit, calculating the insulation resistance R of the high-voltage battery pack to the whole vehicle ground, and feeding back the insulation resistance R to the upper computer.
CN107607785B also proposes an insulation medium resistance value detection circuit, which is used to detect the resistance value of the first insulation medium and the resistance value of the second insulation medium between the positive and negative poles of the high voltage power supply and the grounding device in the circuit under test. The insulation medium resistance value detection circuit respectively measures voltage values of a first detection point, a second detection point, a third detection point and high-voltage low-frequency excitation voltage under the two high-voltage low-frequency excitation voltages through the voltage detection circuit, and then the control circuit calculates the resistance value of the first insulation medium and the resistance value of the second insulation medium according to the measured voltage values and the detection resistance value of the insulation detection resistance network. Therefore, the resistance value of the insulating medium can be detected, the insulating property of the insulating medium can be accurately reflected through the resistance value of the insulating medium, and when the insulating property is low, a prompt or power cut-off is given in time to guarantee normal work of high-voltage and low-voltage electric appliances of the electric automobile and ensure personal safety of drivers and passengers.
In addition, in order to ensure the safety of the high-voltage line, it is also known to arrange both the battery and the high-voltage device in a region on the vehicle that is not susceptible to a collision, for example, under the second-row seat, to prevent the battery and the high-voltage device from being deformed or damaged when the vehicle collides. However, this design places high demands on the installation location of the battery and the high-voltage device, and is not particularly suitable for compact vehicle models. There is limited space available for mounting the battery and the high-voltage device in an area on the vehicle that is not susceptible to a collision. This may cause the high voltage device to occupy space in the battery, which in turn affects the battery capacity.
The prior art still has a number of deficiencies in ensuring the safety of the high voltage lines of electric vehicles.
Disclosure of Invention
The invention aims to provide a power-off protection device for a vehicle and a corresponding vehicle, so that the safety of a high-voltage line of the vehicle is improved.
According to a first aspect of the present invention, there is provided a power cutoff protection apparatus for a vehicle including a battery for providing driving force for the vehicle and a high voltage device forming a high voltage electrical connection with the battery, wherein the power cutoff protection apparatus is configured to be capable of automatically disconnecting the high voltage electrical connection line between the high voltage device and the battery upon detection of an abnormal condition of the vehicle, wherein the power cutoff protection apparatus includes: at least one switching element arranged to be electrically connectable to a battery at one end and to a high voltage device at the other end; a control unit configured to automatically control the switching element to be turned off to disconnect the high-voltage electrical connection between the high-voltage device and the battery, according to a detection signal indicating an abnormal condition of the vehicle.
According to one embodiment of the present invention, the control unit is configured to be able to determine whether the vehicle abnormal condition that has occurred is associated with the high-voltage equipment, based on the detection signal, and the control unit controls the switching element to be turned off only in a case where the vehicle abnormal condition is associated with the high-voltage equipment.
According to one embodiment of the present invention, the power cutoff protection device includes a collision sensor configured to be able to transmit a detection signal to the control unit when a collision of the vehicle is detected.
According to one embodiment of the invention, the collision sensor is arranged on a printed circuit board of the control unit.
According to one embodiment of the invention, the collision sensor is configured to be able to detect the direction in which the vehicle is collided.
According to one embodiment of the invention, the at least one switching element is configured as a contactor and/or as a relay.
According to an embodiment of the invention, the at least one switching element comprises a positive switching element arranged to be electrically connectable at both ends to a positive pole of the battery and a positive pole of the high voltage device, respectively, and/or a negative switching element arranged to be electrically connectable at both ends to a negative pole of the battery and a negative pole of the high voltage device, respectively.
According to one embodiment of the invention, the power-off protection device comprises a pre-charge circuit connected in parallel with the positive switching element, the pre-charge circuit comprising a pre-charge relay.
According to one embodiment of the invention, the power fail safe device comprises a housing in which the at least one switching element and the control unit are accommodated.
According to a second aspect of the present invention, there is provided a vehicle, wherein the vehicle comprises a battery for providing driving force for the vehicle, a high voltage device forming a high voltage electrical connection with the battery, and a power outage protection arrangement according to the present invention.
According to one embodiment of the invention, the high voltage device comprises a charging device for charging the battery.
According to one embodiment of the invention, the high voltage device is arranged at a location more susceptible to impact than the power fail safe means and/or the battery.
According to one embodiment of the invention, the battery is arranged at a location that is more susceptible to impact than the power cutoff protection device and/or the high voltage equipment.
According to one embodiment of the invention, the power-off protection device is arranged such that, when its switching element is open, only the high-voltage equipment on the vehicle corresponding to this switching element is disconnected from the high-voltage electrical connection between the battery, while the other high-voltage equipment still allows to maintain a high-voltage electrical connection with the battery.
The invention has the positive effects that: when an abnormal condition, such as a collision, occurs to the vehicle, the high voltage electrical connection between the high voltage device and the battery can be disconnected by the power cutoff protection device according to the present invention, thereby preventing human contact with the high voltage electricity and preventing problems such as ignition or explosion, which may be caused by the high voltage electricity. This increases the safety of the high-voltage line of the vehicle and the flexibility of the layout of the battery and/or the high-voltage system of the vehicle.
Drawings
The principles, features and advantages of the present invention may be better understood by describing the invention in more detail below with reference to the accompanying drawings. The drawings comprise:
fig. 1 illustrates a power outage protection apparatus for a vehicle, and a battery and a high voltage device connected thereto according to an exemplary embodiment of the present invention;
FIG. 2 illustrates exemplary zoning of a vehicle as to whether it is susceptible to a collision; and
fig. 3 exemplarily shows a power outage protection apparatus for a vehicle according to one exemplary embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Fig. 1 shows a power-off protection device 1 for a vehicle according to an exemplary embodiment of the present invention, and a battery 2 and a high-voltage apparatus 3 connected thereto. The vehicle is, for example, an electric vehicle, such as a pure electric vehicle or a hybrid vehicle, in which the battery 2 is at least partially available to provide vehicle driving force. The vehicle includes a battery 2 for providing driving force for the vehicle and a high-voltage device 3 that forms a high-voltage electrical connection with the battery 2. The battery 2 is, for example, a rechargeable secondary battery. The high voltage device 3 may carry a high voltage of more than 60V when in operation.
In this example embodiment, the power cutoff protection device 1 may be configured to be able to automatically disconnect the high-voltage electrical connection line between the high-voltage apparatus 3 and the battery 2 when an abnormal condition of the vehicle is detected. The power outage protection device 1 may include: at least one switching element 11, the switching element 11 being arranged to be electrically connectable to the battery 2 at one end and to the high voltage device 3 at the other end; a control unit 12, said control unit 12 being configured to be able to automatically control the switching element 11 to open to disconnect the high voltage electrical connection between the high voltage device 3 and the battery 2, in accordance with a detection signal indicating an abnormal condition of the vehicle. The power outage protection device 1 according to the present invention may be constructed as a separate device with respect to the battery 2 and the high voltage apparatus 3. The battery 2, the power cutoff protection device 1, and the high voltage apparatus 3 may be arranged at different positions.
When the vehicle is operating normally, for example, when the vehicle is charging, the switching element 11 of the power cutoff protection device 1 may remain on, the high-voltage electrical connection between the high-voltage apparatus 3 and the battery 2 may be made, and the high-voltage apparatus 3 may be operated normally. When an abnormal condition of the vehicle, such as a collision, is detected, the control unit 12 may control the switching element 11 to be opened such that the high-voltage electrical connection between the high-voltage device 3 and the battery 2 is broken. Thereby, even if the high voltage device 3 is damaged, the high voltage electrical connection of the high voltage device 3 can be timely disconnected, thereby preventing a person from contacting the high voltage electricity and preventing a fire or explosion, etc., which may be caused by the high voltage electricity.
In a vehicle, it is possible to classify the vehicle into a pattern of whether or not it is susceptible to a collision and a pattern of deformation after the collision. For example, as shown in fig. 2, the vehicle may be divided into 3 zones: the vehicle-mounted device includes a region 1, a region 2, and a region 3, wherein the vehicle-mounted device disposed in the region 1 is most susceptible to an impact, such as a possibility of deformation or breakage, and the vehicle-mounted device disposed in the region 3 is least susceptible to an impact, and the vehicle-mounted device disposed in the region 2 is affected by an impact to an extent between the two. Typically, when only zone 1 is impacted but not detected by the detection device at zone 3, the occupant safety protection system of the vehicle is not triggered; when the area 2 is damaged by a collision (for example, a slight collision or a moderate front collision of the vehicle), protective measures such as safety belts and air bags can be triggered, and reversible high-voltage line power failure can also be triggered; when the area 3 is damaged by a collision or a strong shock wave is detected at the area 3, an irreversible high voltage line power down may be triggered. It should be understood that the specific area divisions may differ for different vehicle models.
The vehicle-mounted device itself, which is arranged in an area that is more susceptible to a collision, is difficult to take appropriate safety measures when subjected to a collision, because the vehicle-mounted device may quickly fail to operate properly due to damage at the time of the collision.
Although the safety of the vehicle can be improved to some extent if both the battery 2 and the high-voltage device 3 are arranged in a region in the vehicle that is not easily affected by a collision, such an arrangement, however, has considerable limitations because the installation space in the region that is not easily affected by a collision is limited. In the case of applying the power cutoff protection apparatus 1 of the present invention, the safety of personnel and equipment can be secured by breaking the high-voltage electrical connection between the high-voltage device 3 and the battery 2, whereby the flexibility of the arrangement of the high-voltage device 3 and/or the battery 2 can be improved. For example, the high-voltage device 3 and/or the battery 2 may be disposed at a location (e.g., region 2 or region 1) that is more susceptible to a collision, such as behind a C-pillar of the vehicle or near a front-rear bumper, or the like, while the power cutoff protection device 1 may be disposed at a location (e.g., region 3 or region 2) that is less susceptible to a collision, such as below a second-row seat. Thereby, the layout flexibility of the high voltage device 3 and/or the battery 2 is greatly improved. In addition, the power cutoff protection device 1 is ensured to operate normally when the vehicle collides. Even if the high-voltage device 3 or the battery 2 is damaged in a collision, the power cutoff protection device 1 can ensure disconnection of the high-voltage electrical connection between the high-voltage device 3 and the battery 2.
In one example embodiment, the control unit 12 may be configured to be able to determine whether an occurring vehicle abnormal condition is associated with the high voltage device 3, based on the detection signal. The control unit 12 controls the switching element 11 to be turned off only in the case where the vehicle abnormal condition is associated with the high-voltage device 3. For example, in the case where the high-voltage device 3 electrically connected to the power cutoff protection device 1 is disposed at the rear of the vehicle, when a collision occurs at the front of the vehicle, the high-voltage device 3 disposed at the rear of the vehicle is not damaged by the collision, and the control unit 12 can determine from the detection signal that the collision occurred is not related to the high-voltage device 3, and thus does not change the open-closed state of the switching element 11. The control unit 12 may comprise a printed circuit board.
Fig. 3 shows a power outage protection device 1 for a vehicle according to an exemplary embodiment of the present invention.
In this example embodiment, the power cutoff protection device 1 may include a collision sensor 13, and the collision sensor 13 may be configured to transmit a detection signal to the control unit 12 when a collision of the vehicle is detected. The power cutoff protection device may also include other types of sensors for detecting abnormal conditions of the vehicle, such as sensors for detecting abnormal temperatures, abnormal currents in the electrical circuit, and the like.
The collision sensor 13 may be configured to be able to detect the direction in which the vehicle is collided. For example, the crash sensor 13 is designed as an acceleration sensor, in particular as a triaxial acceleration sensor. The control unit 12 may determine whether the collision is associated with the high voltage device 3 connected to the power cutoff protection apparatus 1, according to the collision direction detected by the collision sensor 13.
The collision sensor 13 may be arranged on a printed circuit board of the control unit 12. Thus, the collision sensor 13 CAN quickly transmit the detection signal to the control unit 12 without having to pass through a time delay due to communication with the control unit 12, for example, through CAN. The power cutoff protection device 1 can perform power cutoff quickly after a vehicle collision, thereby improving safety.
The switching element 11 can be embodied, for example, as a contactor and/or a relay. The high-voltage device 3 may comprise, in particular, a charging device for charging the battery 2, for example an on-board charger (OBC). The switching element 11 of the power outage protection device 1 may have a rated voltage and a rated current adapted to the high voltage electrical connection between the charging equipment and the battery 2.
The at least one switching element 11 includes, for example, a positive switching element 111 and a negative switching element 112. The positive electrode switching element 111 is arranged to be electrically connectable at both ends to the positive electrode of the battery 2 and the positive electrode of the high-voltage device 3, respectively, and the negative electrode switching element 112 is arranged to be electrically connectable at both ends to the negative electrode of the battery 2 and the negative electrode of the high-voltage device 3, respectively. When the power cutoff protection device 1 is disconnected, at least one, and particularly both, of the positive switching element 111 and the negative switching element 112 are disconnected.
The power fail safe device 1 may include, for example, a housing 14, and the switching element 11 and the control unit 12 are accommodated in the housing 14. The housing 14 can protect the components of the power cutoff protection device 1 from being damaged when a vehicle collision occurs. The housing 14 can withstand pressures above 120KN, for example.
The power outage protection device 1 may for example comprise a pre-charging circuit 15 in parallel with the positive switching element 111, said pre-charging circuit 15 comprising a pre-charging relay. At the instant when the high voltage electrical connection line is connected, the capacitance present in the line may cause a considerable current flow and a high temperature arc may occur causing the contact to burn and thus the switching element 11 to stick. The power-off protection device 1 is arranged to close the negative switching element 112 and the pre-charge relay before closing the positive switching element 111. When the precharge process is completed, the positive switching element 111 is closed, and the precharge relay is opened. The pre-charge circuit 15 may, for example, comprise a pre-charge resistor in series with a pre-charge relay.
The power fail safe device 1 may, for example, comprise at least two high voltage electrical connection ports, which are electrically connected to one end of the switching element 11, respectively, within the power fail safe device 1. The power outage protection device 1 may be electrically connected to a battery and a high voltage apparatus through a high voltage electrical connection port. The high voltage electrical connection port may comprise a plug.
The power outage protection device 1 may for example comprise a low voltage electrical connection port for electrical connection to a low voltage power supply apparatus. The low voltage power supply apparatus may supply the power required for the operation of the power outage protection device 1.
The power outage protection apparatus 1 may include, for example, a communication connection port for connecting with an in-vehicle control device. When the collision sensor 13 of the power cutoff protection device 1 detects that the vehicle has collided, a detection signal may be transmitted to a vehicle-mounted control apparatus, such as a central control unit of the vehicle. The in-vehicle control device further controls other in-vehicle devices, for example, stops the charging operation, based on the detection signal.
According to an exemplary embodiment of the present invention, a vehicle may include a battery 2 for providing driving force for the vehicle, a high voltage device 3 forming a high voltage electrical connection with the battery 2, and a power outage protection apparatus 1 according to the present invention.
In the vehicle according to one exemplary embodiment of the present invention, the high-voltage device 3 is arranged at a position more susceptible to a collision than the power cutoff protection apparatus 1 and/or the battery 2.
In a vehicle according to an exemplary embodiment of the present invention, the power outage protection device 1 is arranged such that when its switching element is open, only the high voltage equipment on the vehicle corresponding to that switching element is disconnected from the high voltage electrical connection between the battery 2, while the other high voltage equipment still allows maintaining a high voltage electrical connection with the battery 2. In this case, it is ensured that the unaffected high-voltage apparatus operates properly.
Although specific embodiments of the invention have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications may be devised without departing from the spirit and scope of the present invention.
Claims (10)
1. A power-off protection device for a vehicle including a battery (2) for providing a driving force for the vehicle and a high-voltage apparatus (3) forming a high-voltage electrical connection with the battery (2), wherein the power-off protection device (1) is configured to be capable of automatically disconnecting a high-voltage electrical connection line between the high-voltage apparatus (3) and the battery (2) upon detection of an abnormal condition of the vehicle, wherein the power-off protection device (1) comprises: at least one switching element (11), said switching element (11) being arranged to be electrically connectable at one end to the battery (2) and at the other end to the high voltage device (3); a control unit (12), the control unit (12) being configured to automatically control the switching element (11) to open to disconnect the high-voltage electrical connection between the high-voltage device (3) and the battery (2) in accordance with a detection signal indicating an abnormal condition of the vehicle.
2. The power failure protection device according to claim 1, wherein the control unit (12) is configured to be able to determine whether an occurring vehicle abnormal condition is associated with the high voltage apparatus (3) based on the detection signal, the control unit (12) controlling the switching element (11) to be turned off only in a case where the vehicle abnormal condition is associated with the high voltage apparatus (3).
3. The power fail safe apparatus of claim 1 or 2, wherein the power fail safe apparatus (1) includes a collision sensor (13), the collision sensor (13) being configured to transmit a detection signal to the control unit (12) upon detection of a collision of the vehicle.
4. The power down protection device of claim 3,
the collision sensor (13) is arranged on a printed circuit board of the control unit (12); and/or
The collision sensor (13) is configured to be able to detect a direction in which the vehicle is collided.
5. The power down protection device of any of claims 1-4,
the at least one switching element (11) is designed as a contactor and/or a relay; and/or
The at least one switching element (11) comprises a positive switching element (111) and/or a negative switching element (112), wherein the positive switching element (111) is arranged to be electrically connectable at both ends to a positive pole of the battery (2) and a positive pole of the high voltage device (3), respectively, and the negative switching element (112) is arranged to be electrically connectable at both ends to a negative pole of the battery (2) and a negative pole of the high voltage device (3), respectively.
6. The power down protection device according to claim 5, wherein the power down protection device (1) comprises a pre-charge circuit (15) in parallel with the positive switching element (111), the pre-charge circuit (15) comprising a pre-charge relay.
7. Power-off protection device according to any one of claims 1 to 6, wherein the power-off protection device (1) comprises a housing (14), the at least one switching element (11) and the control unit (12) being accommodated within the housing (14).
8. A vehicle, wherein the vehicle comprises a battery (2) for providing driving force for the vehicle, a high voltage device (3) forming a high voltage electrical connection with the battery (2), and a power down protection arrangement according to any one of claims 1-7.
9. The vehicle according to claim 8,
the high-voltage device (3) comprises a charging device for charging the battery (2); and/or
The high-voltage device (3) is arranged at a location more susceptible to impact than the power-off protection device (1) and/or the battery (2); and/or
The battery (2) is arranged at a location that is more susceptible to impact than the power outage protection (1) and/or the high voltage device (3).
10. A vehicle according to claim 8 or 9, wherein the power fail safe device (1) is arranged such that when its switching element (11) is open, only the high voltage electrical connection between the high voltage equipment on the vehicle corresponding to that switching element and the battery (2) is broken, while the other high voltage equipment still allows high voltage electrical connection to be maintained with the battery (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647332.4A CN111806238A (en) | 2020-07-07 | 2020-07-07 | Power-off protection device for vehicle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647332.4A CN111806238A (en) | 2020-07-07 | 2020-07-07 | Power-off protection device for vehicle and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111806238A true CN111806238A (en) | 2020-10-23 |
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ID=72843126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010647332.4A Pending CN111806238A (en) | 2020-07-07 | 2020-07-07 | Power-off protection device for vehicle and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111806238A (en) |
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2020
- 2020-07-07 CN CN202010647332.4A patent/CN111806238A/en active Pending
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Application publication date: 20201023 |