CN107128181B - Safety loop for test type electric vehicle - Google Patents

Safety loop for test type electric vehicle Download PDF

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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
insulation
disconnected
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switch
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CN107128181A (en
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蔡锦权
李巍华
王桂南
周佳楸
范兆权
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South China University of Technology SCUT
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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
    • 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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Abstract

本发明公开了一种用于试验型电动车的安全回路，包括动力电池、驱动电机、电机控制器、控制系统主开关、电池管理系统、驱动系统主开关、制动可靠性装置、制动超行程开关、惯性开关、急停开关、高压紧急断开装置、低压电源、绝缘监测装置，所述动力电池内设置正极绝缘继电器、负极绝缘继电器，所述低压电源的正极依次串联控制系统主开关、所述高压紧急断开装置的低压端、驱动系统主开关、制动可靠性装置、制动超行程开关、惯性开关、急停开关、绝缘监测装置后分别与正极绝缘继电器、负极绝缘继电器控制连接。本发明能够在出现相关的任意一种异常情况时使动力电池输出断开，驱动电机紧急停止，到达保护驾驶员、乘客以及行人安全的目的。

Figure 201710397457

The invention discloses a safety circuit for a test type electric vehicle, comprising a power battery, a drive motor, a motor controller, a main switch of a control system, a battery management system, a main switch of a drive system, a brake reliability device, a brake super Stroke switch, inertia switch, emergency stop switch, high-voltage emergency disconnection device, low-voltage power supply, and insulation monitoring device. The power battery is equipped with a positive pole insulation relay and a negative pole insulation relay. The positive pole of the low-voltage power supply is connected in series to control the main switch of the system, The low-voltage end of the high-voltage emergency disconnection device, the main switch of the drive system, the brake reliability device, the brake overtravel switch, the inertia switch, the emergency stop switch, and the insulation monitoring device are respectively connected to the positive insulation relay and the negative insulation relay. . The present invention can disconnect the output of the power battery and stop the drive motor in an emergency when any relevant abnormal situation occurs, so as to achieve the purpose of protecting the safety of drivers, passengers and pedestrians.

Figure 201710397457

Description

一种用于试验型电动车的安全回路A safety circuit for experimental electric vehicles

技术领域technical field

本发明涉及汽车领域，特别是涉及一种用于试验型电动车的安全回路。The invention relates to the field of automobiles, in particular to a safety circuit for an experimental electric vehicle.

背景技术Background technique

随着人们环保意识的增强，电动汽车的使用越来越多，电动汽车的发展也越来越大，目前已经有不少的电动乘用车进入市场销售，其中高压电源作为电动汽车的主要能源来源，高压安全问题是电动汽车不可避免的问题，而试验型电动车作为一种特殊的电动汽车，其安全可靠性相比起电动乘用车较小，因此如何提高试验型电动车的安全可靠性，保护驾驶员、乘客以及行人的安全，成为试验型电动车急需解决的问题。With the enhancement of people's awareness of environmental protection, the use of electric vehicles is increasing, and the development of electric vehicles is also increasing. At present, many electric passenger vehicles have entered the market, and high-voltage power supply is the main energy source of electric vehicles. Source, high-voltage safety issues are inevitable for electric vehicles, and experimental electric vehicles, as a special type of electric vehicle, have lower safety and reliability than electric passenger vehicles, so how to improve the safety and reliability of experimental electric vehicles Safety, protecting the safety of drivers, passengers and pedestrians has become an urgent problem to be solved for experimental electric vehicles.

发明内容Contents of the invention

本发明的目的，是为了解决当试验型电动汽车发生故障时如何快速切断动力电源的问题，本发明提供了一种用于试验型电动车的安全回路。The purpose of the present invention is to solve the problem of how to quickly cut off the power supply when the test electric vehicle breaks down. The present invention provides a safety circuit for the test electric vehicle.

本发明的目的可以通过采取以下方案实现：The purpose of the present invention can be achieved by taking the following scheme:

一种用于试验型电动车的安全回路，包括电路连接的动力电池、驱动电机、电机控制器，还包括：控制系统主开关、电池管理系统、驱动系统主开关、制动可靠性装置、制动超行程开关、惯性开关、急停开关、高压紧急断开装置、低压电源、绝缘监测装置，所述的高压紧急断开装置的高压端串接在动力电池的电池正极与电机控制器之间的电路上，所述动力电池内设置分别连接电池正极和电池负极的正极绝缘继电器、负极绝缘继电器，所述的低压电源的正极通过电路依次串联控制系统主开关、所述的高压紧急断开装置的低压端、驱动系统主开关、制动可靠性装置、制动超行程开关、惯性开关、急停开关、绝缘监测装置后分别与正极绝缘继电器、负极绝缘继电器控制连接；所述的电池管理系统的电源端连接控制系统主开关输出端，控制端通过电路分别与正极绝缘继电器、负极绝缘继电器控制连接。A safety circuit for an experimental electric vehicle, including a power battery connected to a circuit, a drive motor, and a motor controller, and also includes: a main switch of a control system, a battery management system, a main switch of a drive system, a braking reliability device, and a control system. Dynamic overtravel switch, inertia switch, emergency stop switch, high-voltage emergency disconnection device, low-voltage power supply, insulation monitoring device, the high-voltage end of the high-voltage emergency disconnection device is connected in series between the battery positive pole of the power battery and the motor controller On the circuit, the power battery is provided with a positive insulation relay and a negative insulation relay respectively connected to the positive pole of the battery and the negative pole of the battery, and the positive pole of the low-voltage power supply is connected in series to control the main switch of the system and the high-voltage emergency disconnection device in sequence through the circuit. The low-voltage end of the drive system, the main switch of the drive system, the brake reliability device, the brake over-travel switch, the inertia switch, the emergency stop switch, and the insulation monitoring device are respectively connected to the positive insulation relay and the negative insulation relay; the battery management system The power supply end of the control system is connected to the main switch output end of the control system, and the control end is respectively connected to the positive insulation relay and the negative insulation relay through the circuit.

进一步地，当动力电池或者电池管理系统不正常工作时，所述电池管理系统用于断开安全回路，使动力电池内的正极绝缘继电器、负极绝缘继电器被断开。Further, when the power battery or the battery management system does not work normally, the battery management system is used to disconnect the safety circuit, so that the positive insulation relay and the negative insulation relay in the power battery are disconnected.

进一步地，当电动汽车用力制动且车轮未抱死以及正极电流从电机控制器流出时，制动可靠性装置用于断开安全回路，使动力电池内的正极绝缘继电器、负极绝缘继电器被断开。Furthermore, when the electric vehicle brakes hard and the wheels are not locked and the positive current flows out from the motor controller, the braking reliability device is used to disconnect the safety circuit, so that the positive insulation relay and the negative insulation relay in the power battery are disconnected. open.

进一步地，当电动汽车出现制动系统失效时，位于离制动踏板一定距离处的制动超行程开关将被触发并断开安全回路，使动力电池内的正极绝缘继电器、负极绝缘继电器被断开。Furthermore, when the brake system of the electric vehicle fails, the brake overtravel switch located at a certain distance from the brake pedal will be triggered and the safety circuit will be disconnected, so that the positive insulation relay and the negative insulation relay in the power battery will be disconnected. open.

进一步地，当电动汽车发生碰撞时，惯性开关将被触发并断开安全回路，使动力电池内的正极绝缘继电器、负极绝缘继电器被断开。Furthermore, when the electric vehicle collides, the inertia switch will be triggered and the safety circuit will be disconnected, so that the positive insulation relay and the negative insulation relay in the power battery will be disconnected.

进一步地，当急停开关被按下时，安全回路将断开，所述动力电池内的正极绝缘继电器、负极绝缘继电器被断开。Further, when the emergency stop switch is pressed, the safety circuit will be disconnected, and the positive insulation relay and the negative insulation relay in the power battery will be disconnected.

进一步地，当高压断开装置被移除时，安全回路将断开，动力电池内的正极绝缘继电器、负极绝缘继电器被断开。Further, when the high-voltage disconnecting device is removed, the safety circuit will be disconnected, and the positive insulation relay and negative insulation relay in the power battery will be disconnected.

进一步地，当绝缘监测装置检测到与最大名义驱动系统工作电压相关联的绝缘电阻小于500Ω/V或自身故障时，绝缘监测装置将断开安全回路，所述动力电池1内的正极绝缘继电器、负极绝缘继电器被断开。Further, when the insulation monitoring device detects that the insulation resistance associated with the maximum nominal driving system operating voltage is less than 500Ω/V or fails by itself, the insulation monitoring device will disconnect the safety circuit, and the positive insulation relay in the power battery 1, Negative isolation relay is opened.

进一步地，当正极绝缘继电器、负极绝缘继电器被断开时，所述动力电池的输出断开，所述电机控制器的电源输入被切断，驱动电机紧急停止。Further, when the positive insulation relay and the negative insulation 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 stops urgently.

进一步地，所述的急停开关的数量为三个，分别设置在车手座舱后的车身两侧及座舱内方便车手处于任意坐姿时都能接触到的位置，三个急停开关通过电路相串联，当任意一个急停开关被按下时，即可通过断开安全回路将动力电池内的正极绝缘继电器、负极绝缘继电器断开。Further, the number of emergency stop switches is three, which are respectively arranged on both sides of the vehicle body behind the driver's cockpit and in a position in the cockpit that is convenient for the driver to reach when he is in any sitting position. The three emergency stop switches are connected in series through a circuit , when any emergency stop switch is pressed, the positive insulation relay and negative insulation relay in the power battery can be disconnected by disconnecting the safety circuit.

相比现有技术，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:

1．本发明通过安全回路保证当试验型电动车发生故障时能马上切断高压输出，保证乘客和行人的安全，大幅度提高试验型电动车的安全性。1. The invention guarantees that the high-voltage output can be cut off immediately when the test-type electric vehicle breaks down through the safety circuit, ensures the safety of passengers and pedestrians, and greatly improves the safety of the test-type electric vehicle.

2．本发明通过使用绝缘继电器来实现低压安全回路控制高压电池的输出，进一步提高了试验型电动车的安全性。2. The invention realizes the output of the low-voltage safety circuit to control the high-voltage battery by using the insulating relay, thereby further improving the safety of the experimental electric vehicle.

3．本发明布置简单，安全可靠性强。3. The present invention has simple layout and strong safety and reliability.

附图说明Description of drawings

图1为本发明实施例的安全回路结构示意图。FIG. 1 is a schematic structural diagram of a safety loop according to an embodiment of the present invention.

图中：1—动力电池、2—控制系统主开关、3—电池管理系统、4—驱动系统主开关、5—制动可靠性装置、6—制动超行程开关、7—惯性开关、 8—急停开关、9—高压断开装置、10—驱动电机、11—电机控制器、12—负极电池绝缘继电器、13—正极电池绝缘继电器、14—电池负极、15—电池正极、16—低压电源、17—绝缘监测装置。In the figure: 1—power battery, 2—main switch of control system, 3—battery management system, 4—main switch of drive system, 5—brake reliability device, 6—brake overtravel switch, 7—inertia switch, 8 —emergency stop switch, 9—high voltage disconnect device, 10—drive motor, 11—motor controller, 12—negative battery insulation relay, 13—positive battery insulation relay, 14—battery negative pole, 15—battery positive pole, 16—low voltage Power supply, 17—insulation monitoring device.

具体实施方式Detailed ways

下面结合附图和具体实施例对本发明的发明目的作进一步详细地描述，实施例不能在此一一赘述，但本发明的实施方式并不因此限定于以下实施例。The purpose of the invention of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.

如附图1所示，一种用于试验型电动车的安全回路，包括电路连接的动力电池1、驱动电机10、电机控制器11，还包括：控制系统主开关2、电池管理系统3、驱动系统主开关4、制动可靠性装置5、制动超行程开关6、惯性开关7、急停开关8、高压紧急断开装置9、低压电源16、绝缘监测装置17，所述的高压紧急断开装置9的高压端串接在动力电池1的电池正极15与电机控制器11之间的电路上，所述动力电池1内设置依次连接电池正极15和电池负极14的正极绝缘继电器13、负极绝缘继电器12，所述的低压电源16的正极通过电路依次串联控制系统主开关2、所述的高压紧急断开装置9的低压端、驱动系统主开关4、制动可靠性装置5、制动超行程开关6、惯性开关7、急停开关8、绝缘监测装置17后分别与正极绝缘继电器13、负极绝缘继电器12控制连接；所述的电池管理系统3的电源端连接控制系统主开关2输出端，控制端通过电路分别与正极绝缘继电器13、负极绝缘继电器12控制连接。As shown in Figure 1, a safety circuit for a test-type electric vehicle includes a power battery 1 connected to a circuit, a drive motor 10, and a motor controller 11, and also includes: a control system main switch 2, a battery management system 3, Drive system main switch 4, brake reliability device 5, brake overtravel switch 6, inertia switch 7, emergency stop switch 8, high-voltage emergency disconnection device 9, low-voltage power supply 16, insulation monitoring device 17, the high-voltage emergency The high-voltage end of the disconnecting device 9 is connected in series on the circuit between the battery positive pole 15 of the power battery 1 and the motor controller 11, and the positive pole insulating relay 13, Negative pole insulation relay 12, the positive pole of described low-voltage power supply 16 passes through the circuit in series to control system main switch 2, the low-voltage end of described high-voltage emergency disconnection device 9, drive system main switch 4, brake reliability device 5, brake The dynamic overtravel switch 6, the inertia switch 7, the emergency stop switch 8, and the insulation monitoring device 17 are respectively connected to the positive insulation relay 13 and the negative insulation relay 12; the power supply terminal of the battery management system 3 is connected to the main switch 2 of the control system The output end and the control end are respectively controlled and connected to the positive insulation relay 13 and the negative insulation relay 12 through the circuit.

当要使用电动汽车时，首先将控制系统主开关2闭合，此时，电池管理系统3开始工作，其将进行动力电池状态及其系统本身的检测，随后再将驱动系统主开关4闭合，若此时整车状态正常，则由低压电源16控制的安全回路闭合，动力电池1内的正极电池绝缘继电器13、负极电池绝缘继电器12将闭合，动力电池1将从电池正极15、电池负极14向电机控制器11供电，驱动电机10将正常工作。When an electric vehicle is to be used, the main switch 2 of the control system is first closed. At this time, the battery management system 3 starts to work, which will detect the state of the power battery and the system itself, and then the main switch 4 of the drive system is closed. If At this time, the state of the whole vehicle is normal, and 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 will be closed, and the power battery 1 will be connected from the battery positive pole 15 to the battery negative pole 14. Motor controller 11 supplies power, and drive motor 10 will work normally.

当动力电池1或者电池管理系统3不正常工作时，所述电池管理系统3用于断开安全回路，使动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the power battery 1 or the battery management system 3 does not work normally, the battery management system 3 is used to disconnect the safety circuit, so that the positive insulation relay 13 and the negative insulation relay 12 in the power battery 1 are disconnected.

当电动汽车用力制动且车轮未抱死以及正极电流（驱动汽车前进的电流）从电机控制器11流出时，制动可靠性装置5用于断开安全回路，使动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the electric vehicle brakes hard and the wheels are not locked and the positive current (the current driving the vehicle forward) flows out from the motor controller 11, the brake reliability device 5 is used to disconnect the safety circuit and insulate the positive pole in the power battery 1 The relay 13 and the negative insulation relay 12 are disconnected.

当电动汽车出现制动系统失效时，位于离制动踏板一定距离处的制动超行程开关6将被触发并断开安全回路，使动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the brake system of the electric vehicle fails, the brake overtravel switch 6 located at a certain distance from the brake pedal will be triggered and the safety circuit will be disconnected, so that the positive insulation relay 13 and the negative insulation relay 12 in the power battery 1 are activated. disconnect.

当电动汽车发生碰撞时，惯性开关7将被触发并断开安全回路，使动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the electric vehicle collides, the inertia switch 7 will be triggered and the safety circuit will be disconnected, so that the positive insulation relay 13 and the negative insulation relay 12 in the power battery 1 are disconnected.

当急停开关8被按下时，安全回路将断开，所述动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the emergency stop switch 8 is pressed, the safety circuit will be disconnected, and the positive insulation relay 13 and the negative insulation relay 12 in the power battery 1 will be disconnected.

当高压断开装置9被移除时，安全回路将断开，动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the high-voltage disconnecting device 9 is removed, the safety circuit will be disconnected, and the positive insulation relay 13 and the negative insulation relay 12 in the power battery 1 will be disconnected.

当绝缘监测装置17检测到与最大名义驱动系统工作电压相关联的绝缘电阻小于500Ω/V或自身故障时，绝缘监测装置17将断开安全回路，所述动力电池1内的正极绝缘继电器13、负极绝缘继电器12被断开。When the insulation monitoring device 17 detects that the insulation resistance associated with the maximum nominal driving system operating voltage is less than 500Ω/V or when it fails, the insulation monitoring device 17 will disconnect the safety circuit, and the positive insulation relay 13, The negative insulation relay 12 is turned off.

当出现上述情况时正极绝缘继电器13、负极绝缘继电器12被断开时，所述动力电池1的输出断开，所述电机控制器11的电源输入被切断，驱动电机10紧急停止。When the above situation occurs, the positive insulation relay 13 and the negative insulation relay 12 are disconnected, the output of the power battery 1 is disconnected, the power input of the motor controller 11 is cut off, and the drive motor 10 is stopped in an emergency.

本实施例中，所述的急停开关8的数量为三个，分别设置在车手座舱后的车身两侧及座舱内方便车手处于任意坐姿时都能接触到的位置，三个急停开关8通过电路相串联，当任意一个急停开关8被按下时，即可通过断开安全回路将动力电池1内的正极绝缘继电器13、负极绝缘继电器12断开。In the present embodiment, the quantity of described emergency stop switch 8 is three, is respectively arranged on both sides of the vehicle body behind the driver's cockpit and in the cockpit to facilitate the driver to be in the position that can touch when any sitting position, three emergency stop switches 8 By connecting the circuits in series, when any emergency stop switch 8 is pressed, the positive insulation relay 13 and the negative insulation relay 12 in the power battery 1 can be disconnected by disconnecting the safety circuit.

综上所述，当出现控制或驱动系统主开关断开、电池管理系统3检测到电源故障或自身故障、高压紧急断开装置9被移除、用力制动以及正极电流从电机控制器11流出、制动超行程开关6或惯性开关7或急停开关8被触发、绝缘监测装置17检测到绝缘故障或自身故障等情况中的任意一种时，安全回路都将被断开，使得正、负极绝缘继电器断开，动力电池输出断开，驱动电机紧急停止，保证乘客和行人的安全，大幅度提高试验型电动车的安全性。To sum up, when the main switch of the control or drive system is disconnected, the battery management system 3 detects a power failure or its own failure, the high-voltage emergency disconnection device 9 is removed, the brake is applied hard, and the positive current flows out of the motor controller 11 , brake overtravel switch 6 or inertia switch 7 or emergency stop switch 8 is triggered, insulation monitoring device 17 detects any one of the situations such as insulation fault or self-fault, etc., the safety circuit will be disconnected, so that positive, The negative insulation relay is disconnected, the output of the power battery is disconnected, and the driving motor is stopped in an emergency to ensure the safety of passengers and pedestrians, and greatly improve the safety of the experimental electric vehicle.

本发明的上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (3)

1.一种用于试验型电动车的安全回路，包括电路连接的动力电池(1)、驱动电机(10)、电机控制器(11)，其特征在于：还包括：控制系统主开关(2)、电池管理系统(3)、驱动系统主开关(4)、制动可靠性装置(5)、制动超行程开关(6)、惯性开关(7)、急停开关(8)、高压紧急断开装置(9)、低压电源(16)、绝缘监测装置(17)，所述的高压紧急断开装置(9)的高压端串接在动力电池(1)的电池正极(15)与电机控制器(11)之间的电路上，所述动力电池(1)内设置依次连接电池正极(15)和电池负极(14)的正极绝缘继电器(13)、负极绝缘继电器(12)，所述的低压电源(16)的正极通过电路依次串联控制系统主开关(2)、所述的高压紧急断开装置(9)的低压端、驱动系统主开关(4)、制动可靠性装置(5)、制动超行程开关(6)、惯性开关(7)、急停开关(8)、绝缘监测装置(17)后分别与正极绝缘继电器(13)、负极绝缘继电器(12)控制连接；所述的电池管理系统(3)的电源端连接控制系统主开关(2)输出端，控制端通过电路分别与正极绝缘继电器(13)、负极绝缘继电器(12)控制连接；1. A safety circuit for an experimental electric vehicle, comprising a power battery (1), a drive motor (10), and a motor controller (11) connected to a circuit, characterized in that: it also includes: a control system main switch (2 ), battery management system (3), drive system main switch (4), brake reliability device (5), brake overtravel switch (6), inertia switch (7), emergency stop switch (8), high voltage emergency The disconnecting device (9), the low-voltage power supply (16), and the insulation monitoring device (17), the high-voltage end of the high-voltage emergency disconnecting device (9) is connected in series between the battery positive pole (15) of the power battery (1) and the motor On the circuit between the controllers (11), the power battery (1) is provided with a positive insulation relay (13) and a negative insulation relay (12) which are sequentially connected to the battery positive pole (15) and the battery negative pole (14). The positive pole of the low-voltage power supply (16) is connected in series with the main switch (2) of the control system, the low-voltage end of the high-voltage emergency disconnection device (9), the main switch of the drive system (4), and the braking reliability device (5) through the circuit. ), the brake overtravel switch (6), the inertia switch (7), the emergency stop switch (8), and the insulation monitoring device (17) are respectively connected to the positive insulation relay (13) and the negative insulation relay (12); The power supply terminal of the battery management system (3) described above is connected to the output terminal of the main switch (2) of the control system, and the control terminal is respectively connected to the positive insulation relay (13) and the negative insulation relay (12) through a circuit; 当动力电池(1)或者电池管理系统(3)不正常工作时，所述电池管理系统(3)用于断开安全回路，使动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开；When the power battery (1) or the battery management system (3) is not working properly, the battery management system (3) is used to disconnect the safety circuit, so that the positive insulation relay (13) and the negative pole in the power battery (1) are insulated Relay (12) is disconnected; 当电动汽车用力制动且车轮未抱死以及正极电流从电机控制器11流出时，制动可靠性装置(5)用于断开安全回路，使动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开；When the electric vehicle brakes hard and the wheels are not locked and the positive current flows out from the motor controller 11, the braking reliability device (5) is used to disconnect the safety circuit, so that the positive insulation relay (13) in the power battery (1) ), the negative insulation relay (12) is disconnected; 当电动汽车出现制动系统失效时，位于离制动踏板一定距离处的制动超行程开关(6)将被触发并断开安全回路，使动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开；When the brake system of the electric vehicle fails, the brake overtravel switch (6) located at a certain distance from the brake pedal will be triggered and the safety circuit will be disconnected, so that the positive insulation relay (13) in the power battery (1) , the negative insulation relay (12) is disconnected; 当电动汽车发生碰撞时，惯性开关(7)将被触发并断开安全回路，使动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开；When the electric vehicle collides, the inertia switch (7) will be triggered and the safety circuit will be disconnected, so that the positive insulation relay (13) and the negative insulation relay (12) in the power battery (1) are disconnected; 当急停开关(8)被按下时，安全回路将断开，所述动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开；When the emergency stop switch (8) is pressed, the safety circuit will be disconnected, and the positive insulation relay (13) and the negative insulation relay (12) in the power battery (1) are disconnected; 当高压紧急断开装置(9)被移除时，安全回路将断开，动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开；When the high-voltage emergency disconnection device (9) is removed, the safety circuit will be disconnected, and the positive insulation relay (13) and the negative insulation relay (12) in the power battery (1) will be disconnected; 当绝缘监测装置(17)检测到与最大名义驱动系统工作电压相关联的绝缘电阻小于500Ω/V或自身故障时，绝缘监测装置(17)将断开安全回路，所述动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)被断开。When the insulation monitoring device (17) detects that the insulation resistance associated with the maximum nominal drive system operating voltage is less than 500Ω/V or when it fails, the insulation monitoring device (17) will disconnect the safety circuit, and the power battery (1) will The positive pole insulation relay (13) and the negative pole insulation relay (12) of the positive pole insulation relay (12) are disconnected. 2.根据权利要求1所述的用于试验型电动车的安全回路，其特征在于：当正极绝缘继电器(13)、负极绝缘继电器(12)被断开时，所述动力电池(1)的输出断开，所述电机控制器(11)的电源输入被切断，驱动电机(10)紧急停止。2. The safety circuit for experimental electric vehicles according to claim 1, characterized in that: when the positive insulation relay (13) and the negative insulation relay (12) are disconnected, the power battery (1) The output is disconnected, the power input of the motor controller (11) is cut off, and the driving motor (10) stops urgently. 3.根据权利要求1所述的用于试验型电动车的安全回路，其特征在于：所述的急停开关(8)的数量为三个，分别设置在车手座舱后的车身两侧及座舱内方便车手处于任意坐姿时都能接触到的位置，三个急停开关(8)通过电路相串联，当任意一个急停开关(8)被按下时，即可通过断开安全回路将动力电池(1)内的正极绝缘继电器(13)、负极绝缘继电器(12)断开。3. The safety circuit for experimental electric vehicles according to claim 1, characterized in that: the number of the emergency stop switches (8) is three, which are respectively arranged on both sides of the vehicle body and the cockpit behind the driver's cockpit It is convenient for the driver to reach the position when he is in any sitting position. Three emergency stop switches (8) are connected in series through the circuit. When any one of the emergency stop switches (8) is pressed, the power can be turned off The positive insulation relay (13) and the negative insulation relay (12) in the battery (1) are disconnected.
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