CN107128181B - Safety loop for test type electric vehicle - Google Patents
Safety loop for test type electric vehicle Download PDFInfo
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- CN107128181B CN107128181B CN201710397457.4A CN201710397457A CN107128181B CN 107128181 B CN107128181 B CN 107128181B CN 201710397457 A CN201710397457 A CN 201710397457A CN 107128181 B CN107128181 B CN 107128181B
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- relay
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- insulation
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- battery
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a safety loop for a test type electric vehicle, which comprises a power battery, a driving motor, a motor controller, a control system main switch, a battery management system, a driving system main switch, a braking reliability device, a braking overtravel switch, an inertial switch, an emergency stop switch, a high-voltage emergency disconnection device, a low-voltage power supply and an insulation monitoring device, wherein a positive insulation relay and a negative insulation relay are arranged in the power battery, the positive electrode of the low-voltage power supply is sequentially connected with the control system main switch, the low-voltage end of the high-voltage emergency disconnection device, the driving system main switch, the braking reliability device, the braking overtravel switch, the inertial switch, the emergency stop switch and the insulation monitoring device in series and then are respectively connected with the positive insulation relay and the negative insulation relay in a control manner. The invention can disconnect the output of the power battery when any abnormal condition occurs, and the driving motor is stopped in an emergency, thereby achieving the purpose of protecting the safety of drivers, passengers and pedestrians.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a safety loop for a test type electric vehicle.
Background
With the enhancement of people's environmental awareness, electric automobile's use is more and more, electric automobile's development is also more and more big, has now had few electric passenger car to get into market sales, wherein high voltage power supply is as electric automobile's main energy source, and high voltage safety problem is electric automobile unavoidable problem, and experimental type electric automobile is as a special electric automobile, and its fail safe nature is less than electric passenger car, so how to improve experimental type electric automobile's fail safe nature, the safety of protection driver, passenger and pedestrian becomes experimental type electric automobile urgent need the problem of solving.
Disclosure of Invention
The invention aims to solve the problem of how to rapidly cut off a power supply when a test type electric vehicle breaks down, and provides a safety loop for the test type electric vehicle.
The aim of the invention can be achieved by adopting the following scheme:
a safety loop for experimental electric motor car includes power battery, driving motor, the motor controller of circuit connection, still includes: the system comprises a control system main switch, a battery management system, a driving system main switch, a braking reliability device, a braking overtravel-limit switch, an inertial switch, an emergency stop switch, a high-voltage emergency disconnection device, a low-voltage power supply and an insulation monitoring device, wherein the high-voltage end of the high-voltage emergency disconnection device is connected in series with a circuit between the battery anode of a power battery and a motor controller, a positive insulation relay and a negative insulation relay which are respectively connected with the battery anode and the battery cathode are arranged in the power battery, the positive electrode of the low-voltage power supply is sequentially connected with the control system main switch, the low-voltage end of the high-voltage emergency disconnection device, the driving system main switch, the braking reliability device, the braking overtravel-limit switch, the inertial switch, the emergency stop switch and the insulation monitoring device in series and then are respectively connected with the positive insulation relay and the negative insulation relay in a control manner; the power end of the battery management system is connected with the output end of the main switch of the control system, and the control end is respectively connected with the positive electrode insulating relay and the negative electrode insulating relay in a control way through circuits.
Further, when the power battery or the battery management system does not work normally, the battery management system is used for disconnecting the safety loop, so that the positive electrode insulating relay and the negative electrode insulating relay in the power battery are disconnected.
Further, when the electric automobile is braked with force and the wheels are not locked, and positive current flows out of the motor controller, the braking reliability device is used for disconnecting the safety loop, so that the positive electrode insulating relay and the negative electrode insulating relay in the power battery are disconnected.
Further, when the braking system of the electric automobile fails, a braking overtravel-limit switch positioned at a certain distance from a braking pedal is triggered and a safety loop is disconnected, so that a positive electrode insulating relay and a negative electrode insulating relay in the power battery are disconnected.
Further, when the electric automobile collides, the inertial switch is triggered and opens the safety circuit, so that the positive electrode insulating relay and the negative electrode insulating relay in the power battery are opened.
Further, when the scram switch is pressed, the safety circuit will be opened, and the positive and negative insulating relays in the power battery will be opened.
Further, when the high voltage disconnect device is removed, the safety circuit will open and the positive and negative insulating relays within the power cell will open.
Further, when the insulation monitoring device detects that the insulation resistance associated with the maximum nominal drive system operating voltage is less than 500 Ω/V or a self-fault, the insulation monitoring device will disconnect the safety circuit, and the positive and negative insulation relays within the power cell 1 are disconnected.
Further, when the positive electrode insulating relay and the negative electrode insulating relay are disconnected, the output of the power battery is disconnected, the power input of the motor controller is cut off, and the driving motor is stopped in an emergency.
Further, the number of the emergency stop switches is three, the emergency stop switches are respectively arranged on two sides of a vehicle body behind a driver cabin and in positions in the cabin, which are convenient for the driver to touch when the driver is in any sitting position, the three emergency stop switches are connected in series through a circuit, and when any emergency stop switch is pressed down, the positive electrode insulating relay and the negative electrode insulating relay in the power battery can be disconnected through the disconnection safety circuit.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can cut off high-voltage output immediately when the test electric vehicle breaks down through the safety loop, ensure the safety of passengers and pedestrians, and greatly improve the safety of the test electric vehicle.
2. According to the invention, the output of the high-voltage battery is controlled by the low-voltage safety loop through the insulating relay, so that the safety of the test type electric vehicle is further improved.
3. The invention has simple arrangement and strong safety and reliability.
Drawings
Fig. 1 is a schematic diagram of a safety circuit structure according to an embodiment of the invention.
In the figure: 1-power battery, 2-control system main switch, 3-battery management system, 4-driving system main switch, 5-braking reliability device, 6-braking overtravel-limit switch, 7-inertial switch, 8-emergency stop switch, 9-high voltage disconnecting device, 10-driving motor, 11-motor controller, 12-negative electrode battery insulation relay, 13-positive electrode battery insulation relay, 14-battery negative electrode, 15-battery positive electrode, 16-low voltage power supply and 17-insulation monitoring device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and specific examples, which are not to be construed as limiting the embodiments of the present invention.
As shown in fig. 1, a safety circuit for a test electric vehicle includes a power battery 1, a driving motor 10, and a motor controller 11, which are electrically connected, and further includes: the control system comprises a control system main switch 2, a battery management system 3, a driving system main switch 4, a braking reliability device 5, a braking overtravel switch 6, an inertial switch 7, an emergency stop switch 8, a high-voltage emergency disconnection device 9, a low-voltage power supply 16 and an insulation monitoring device 17, wherein the high-voltage end of the high-voltage emergency disconnection device 9 is connected in series with a circuit between a battery positive electrode 15 and a motor controller 11 of a power battery 1, a positive electrode insulation relay 13 and a negative electrode insulation relay 12 which are sequentially connected with a battery positive electrode 15 and a battery negative electrode 14 are arranged in the power battery 1, the positive electrode of the low-voltage power supply 16 is sequentially connected in series with the control system main switch 2, the low-voltage end of the high-voltage emergency disconnection device 9, the driving system main switch 4, the braking reliability device 5, the braking overtravel switch 6, the inertial switch 7, the emergency stop switch 8 and the insulation monitoring device 17 respectively and then are in control connection with the positive electrode insulation relay 13 and the negative electrode insulation relay 12; the power end of the battery management system 3 is connected with the output end of the control system main switch 2, and the control end is respectively in control connection with the positive electrode insulating relay 13 and the negative electrode insulating relay 12 through circuits.
When the electric vehicle is to be used, the control system main switch 2 is firstly closed, at this time, the battery management system 3 starts to work, the detection of the power battery state and the system itself is carried out, then the driving system main switch 4 is closed, if the whole vehicle state is normal at this time, the safety loop controlled by the low-voltage power supply 16 is closed, the positive battery insulation relay 13 and the negative battery insulation relay 12 in the power battery 1 are closed, the power battery 1 supplies power to the motor controller 11 from the battery positive electrode 15 and the battery negative electrode 14, and the driving motor 10 works normally.
When the power battery 1 or the battery management system 3 does not work normally, the battery management system 3 is used for breaking a safety circuit, so that the positive electrode insulating relay 13 and the negative electrode insulating relay 12 in the power battery 1 are broken.
When the electric vehicle is braked with force and the wheels are not locked and positive current (current driving the vehicle forward) flows out from the motor controller 11, the brake reliability device 5 is used to disconnect the safety circuit, so that the positive insulating relay 13 and the negative insulating relay 12 in the power battery 1 are disconnected.
When the braking system of the electric automobile fails, the braking overtravel switch 6 positioned at a certain distance from the braking pedal is triggered and opens the safety circuit, so that the positive electrode insulating relay 13 and the negative electrode insulating relay 12 in the power battery 1 are opened.
When the electric automobile collides, the inertia switch 7 is triggered to open a safety circuit, so that the positive electrode insulating relay 13 and the negative electrode insulating relay 12 in the power battery 1 are opened.
When the emergency stop switch 8 is pressed, the safety circuit is opened, and the positive insulating relay 13 and the negative insulating relay 12 in the power battery 1 are opened.
When the high voltage breaking device 9 is removed, the safety circuit will open and the positive 13 and negative 12 insulating relays within the power cell 1 will open.
When the insulation monitoring device 17 detects that the insulation resistance associated with the maximum nominal drive system operating voltage is less than 500 Ω/V or that the insulation monitoring device 17 itself fails, the insulation monitoring device 17 will open the safety circuit and the positive 13 and negative 12 insulation relays within the power cell 1 will be opened.
When the positive and negative insulating relays 13 and 12 are turned off in the above situation, the output of the power battery 1 is turned off, the power input of the motor controller 11 is turned off, and the driving motor 10 is stopped in an emergency.
In this embodiment, the number of the emergency stop switches 8 is three, and the three emergency stop switches 8 are respectively arranged on two sides of a vehicle body behind a driver cabin and in positions in the cabin, which are convenient for the driver to contact when the driver is in any sitting position, and are connected in series through a circuit, when any one emergency stop switch 8 is pressed down, the positive electrode insulation relay 13 and the negative electrode insulation relay 12 in the power battery 1 can be disconnected through the disconnection safety circuit.
In summary, when any one of the conditions of the control or driving system main switch being turned off, the battery management system 3 detecting a power failure or self failure, the high-voltage emergency turn-off device 9 being removed, braking with force, and the positive current flowing out from the motor controller 11, the braking overtravel switch 6 or the inertia switch 7 or the emergency stop switch 8 being triggered, the insulation monitoring device 17 detecting an insulation failure or self failure occurs, the safety loop is turned off, so that the positive and negative insulation relays are turned off, the power battery output is turned off, the driving motor is stopped emergently, the safety of passengers and pedestrians is ensured, and the safety of the test electric vehicle is greatly improved.
The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (3)
1. The utility model provides a safety loop for experimental electric motor car, includes power battery (1), driving motor (10), motor controller (11) of circuit connection, its characterized in that: further comprises: the control system comprises a control system main switch (2), a battery management system (3), a driving system main switch (4), a braking reliability device (5), a braking overtravel-limit switch (6), an inertial switch (7), an emergency stop switch (8), a high-voltage emergency disconnection device (9), a low-voltage power supply (16) and an insulation monitoring device (17), wherein the high-voltage end of the high-voltage emergency disconnection device (9) is connected in series to a circuit between a battery positive electrode (15) of a power battery (1) and a motor controller (11), a positive electrode insulation relay (13) and a negative electrode insulation relay (12) which are sequentially connected with the battery positive electrode (15) and a battery negative electrode (14) are arranged in the power battery (1), the positive electrode of the low-voltage power supply (16) is sequentially connected in series with the control system main switch (2) through the circuit, and the low-voltage end of the driving system main switch (4), the braking reliability device (5), the braking overtravel-limit switch (6), the inertial switch (7), the emergency stop switch (8) and the insulation device (17) are respectively connected with the positive electrode insulation relay (13) and the negative electrode insulation relay (12) after the insulation device (17); the power end of the battery management system (3) is connected with the output end of the control system main switch (2), and the control end is respectively in control connection with the positive electrode insulating relay (13) and the negative electrode insulating relay (12) through circuits;
when the power battery (1) or the battery management system (3) does not work normally, the battery management system (3) is used for disconnecting a safety loop, so that the positive electrode insulating relay (13) and the negative electrode insulating relay (12) in the power battery (1) are disconnected;
when the electric automobile is braked with force and wheels are not locked, and positive current flows out of the motor controller 11, the braking reliability device (5) is used for disconnecting a safety loop, so that the positive insulating relay (13) and the negative insulating relay (12) in the power battery (1) are disconnected;
when the braking system of the electric automobile fails, a braking overtravel-limit switch (6) positioned at a certain distance from a braking pedal is triggered and a safety loop is disconnected, so that an anode insulating relay (13) and a cathode insulating relay (12) in the power battery (1) are disconnected;
when the electric automobile collides, the inertial switch (7) is triggered and opens the safety loop, so that the positive electrode insulating relay (13) and the negative electrode insulating relay (12) in the power battery (1) are opened;
when the emergency stop switch (8) is pressed down, the safety circuit is disconnected, and the positive electrode insulating relay (13) and the negative electrode insulating relay (12) in the power battery (1) are disconnected;
when the high-voltage emergency opening device (9) is removed, the safety circuit is opened, and the positive electrode insulating relay (13) and the negative electrode insulating relay (12) in the power battery (1) are opened;
when the insulation monitoring device (17) detects that the insulation resistance associated with the maximum nominal driving system working voltage is smaller than 500 omega/V or the insulation monitoring device fails, the insulation monitoring device (17) breaks a safety loop, and the positive insulation relay (13) and the negative insulation relay (12) in the power battery (1) are disconnected.
2. The safety circuit for a test electric vehicle of claim 1, wherein: when the positive electrode insulating relay (13) and the negative electrode insulating relay (12) are disconnected, the output of the power battery (1) is disconnected, the power input of the motor controller (11) is disconnected, and the driving motor (10) is stopped in an emergency.
3. The safety circuit for a test electric vehicle of claim 1, wherein: the number of the emergency stop switches (8) is three, the emergency stop switches are respectively arranged on two sides of a vehicle body behind a driver cabin and in positions which are convenient for the driver to contact when the driver is in any sitting position in the cabin, the three emergency stop switches (8) are connected in series through a circuit, and when any one emergency stop switch (8) is pressed down, the positive electrode insulating relay (13) and the negative electrode insulating relay (12) in the power battery (1) can be disconnected through a disconnection safety loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710397457.4A CN107128181B (en) | 2017-05-31 | 2017-05-31 | Safety loop for test type electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710397457.4A CN107128181B (en) | 2017-05-31 | 2017-05-31 | Safety loop for test type electric vehicle |
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| Publication Number | Publication Date |
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| CN107128181A CN107128181A (en) | 2017-09-05 |
| CN107128181B true CN107128181B (en) | 2023-06-20 |
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| CN201710397457.4A Active CN107128181B (en) | 2017-05-31 | 2017-05-31 | Safety loop for test type electric vehicle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594826A (en) * | 2018-06-04 | 2018-09-28 | 北京智行者科技有限公司 | Car body interface system |
| CN110625618A (en) * | 2018-06-25 | 2019-12-31 | 中瑞福宁机器人（沈阳）有限公司 | Service robot based on electronic skin |
| CN112265471B (en) * | 2020-10-27 | 2022-03-22 | 格力博(江苏)股份有限公司 | Battery pack on-off control system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544215B (en) * | 2009-05-12 | 2011-09-21 | 奇瑞汽车股份有限公司 | High-voltage double-loop safety system of electric vehicle and method thereof |
| CN202923410U (en) * | 2012-10-23 | 2013-05-08 | 广州汽车集团股份有限公司 | High-voltage protection system of power battery and vehicle |
| CN203519737U (en) * | 2013-09-07 | 2014-04-02 | 潍柴动力股份有限公司 | Electric vehicle test system possessing scram and insulation protection functions |
| WO2016090598A1 (en) * | 2014-12-11 | 2016-06-16 | Volkswagen (China) Investment Co., Ltd. | High voltage security module for an electrically drivable vehicle and electrically drivable vehicle with such a high voltage security module |
| CN105818690B (en) * | 2016-03-02 | 2018-07-27 | 康迪电动汽车（上海）有限公司 | High-voltage power distribution device and control method |
| CN206826417U (en) * | 2017-05-31 | 2018-01-02 | 华南理工大学 | A kind of safety return circuit for prototype version electric car |
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| CN107128181A (en) | 2017-09-05 |
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