CN110103718A - A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle - Google Patents

A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle Download PDF

Info

Publication number
CN110103718A
CN110103718A CN201910372786.2A CN201910372786A CN110103718A CN 110103718 A CN110103718 A CN 110103718A CN 201910372786 A CN201910372786 A CN 201910372786A CN 110103718 A CN110103718 A CN 110103718A
Authority
CN
China
Prior art keywords
dcdc
bypass
circuit
inverter
power battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910372786.2A
Other languages
Chinese (zh)
Inventor
刘新超
刘靓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chery Automobile Co Ltd
Original Assignee
Chery Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CN201910372786.2A priority Critical patent/CN110103718A/en
Publication of CN110103718A publication Critical patent/CN110103718A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00Arrangement of adaptations of instruments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/50Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

Abstract

The invention discloses the bypass protection systems of high-voltage bidirectional DCDC for electric vehicle a kind of, including dcdc converter, inverter, automobile power cell, fault detection circuit, bypass control circuit, bypass circuit, the power battery is connect with bypass circuit, the bypass circuit is separately connected the output end of dcdc converter and inverter, the input terminal of the output end connection inverter of the dcdc converter, the fault detection circuit is used to detect the fault-signal of dcdc converter, its output end is connect with bypass control circuit, the bypass control circuit controls bypass circuit after detecting DCDC fault-signal and connect power battery with inverter and disconnect the connection of power battery Yu DCDC inverter.The present invention has the advantages that DCDC directly can be cut out circuit when detecting DCDC failure, battery is directly connected as to vehicle power supply with inverter, automobile can not start traveling caused by avoiding because of DCDC failure.

Description

A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle
Technical field
The present invention relates to automobile dynamic system field, in particular to the bypass of a kind of high-voltage bidirectional DCDC for electric vehicle is protected Protecting system.
Background technique
Increasingly depleted with natural resources, various countries are greatly developing new energy technology, and electric car is as new energy The representative of product has obtained significant progress, and high tension battery and its charge and discharge power technology are the key that restrict Development of Electric Vehicles One of technology can generate certain influence in the full electricity of battery capacity and lower electricity to power drive system efficiency, and part is electronic Automobile has contemplated that increasing high-voltage bidirectional dcdc converter increases cell voltage in a stationary value, can efficiently solve battery electricity Press output area big, the low problem of output voltage improves the operational efficiency and performance of vehicle.
But increase high-voltage bidirectional dcdc converter and increase vehicle high-pressure system complexity, the in addition increase of power device It will lead to being multiplied for system failure point, extreme influence brought to vehicle reliability, and the safety for new-energy automobile Property is most important, and vehicle, which casts anchor to bring, to be seriously affected.The solution of new energy vehicle in response to this problem essentially consists at present Increase control strategy and monitoring function, once but lifting/voltage reducing system there is unrecoverable failure, vehicle still can not normally travel, Seriously affect the reliability and safety of vehicle.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide the sides of high-voltage bidirectional DCDC for electric vehicle a kind of System is protected on road, guarantees the powered operation of vehicle for still being able to when bidirectional DC/DC breaks down.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of high-voltage bidirectional DCDC's for electric vehicle Bypass protection system, including bidirectional DC/DC converter, inverter, automobile power cell further include fault detection circuit, bypass control Circuit processed, bypass circuit, the power battery are connect with bypass circuit, and the bypass circuit is separately connected dcdc converter and inverse Become the output end of device, the input terminal of the output end connection inverter of the dcdc converter, the fault detection circuit is for examining The fault-signal of dcdc converter is surveyed, output end is connect with bypass control circuit, and the bypass control circuit is detecting Control that power battery is connect by bypass circuit with inverter and to disconnect power battery inverse with DCDC after dcdc converter fault-signal Become the connection of device.
The bypass circuit includes contactor, and the contactor includes coil KM and corresponding normally opened contact KM2, normally closed touching Point KM1, the one end the normally opened contact KM2 connect power battery, and the other end connects the input terminal of inverter, the normally-closed contact KM1 is arranged between power battery and bidirectional DC/DC, and the coil KM of contactor described in the bypass control circuit drive control is logical Power-off.
The normally-closed contact KM1 concatenation is arranged between the switching tube of dcdc converter and power battery.
The bypass control circuit is connect with alarm, for issuing alarm signal after DCDC failure.
The bypass control circuit connects entire car controller by CAN bus, and the vehicle control unit controls instrument issues DCDC fault indication signal.
The alarm is integrated in instrument, for issuing the alarm signal of DCDC failure.
The fault detection circuit includes measure voltage &amp, for detecting the voltage electricity of dcdc converter output end Flow signal.To be conveniently used for detection high-voltage bidirectional dcdc converter working condition.
The present invention has the advantages that DCDC directly can be cut out circuit when detecting DCDC failure, by battery directly with Inverter is connected as vehicle power supply, and automobile can not start traveling caused by avoiding because of DCDC failure;Warning reminding is provided simultaneously, User is facilitated to understand DCDC malfunction in time, with timely maintenance conditions;By the detection being arranged in instrument, user is facilitated to obtain Take alerting signal;And this programme structure is simple, at low cost, facilitates popularization and use.
Detailed description of the invention
Below to each width attached drawing of description of the invention expression content and figure in label be briefly described:
Fig. 1 is structure of the invention schematic diagram;
Fig. 2 is the schematic diagram of bypass circuitry of the present invention under normal circumstances;
Fig. 3 is schematic diagram of the bypass circuitry of the present invention under DCDC fault condition
Specific embodiment
A specific embodiment of the invention is made further detailed below against attached drawing by the description to optimum embodiment Thin explanation.
In the present invention, by increasing a kind of high-voltage bidirectional dcdc converter high pressure turbine by scheme, can effectively increase rise/ Depressurizing system reliability guarantees to start bypass circuit automatically when high-voltage bidirectional dcdc converter breaks down, protect Card vehicle dynamical system still can work normally, and avoid causing because of high-voltage bidirectional dcdc converter failure vehicle from sitting problem, Improve security of system and reliability.Program circuit is simple, can be dynamic in electric car in integrated high voltage bidirectional DC/DC converter When Force system high-voltage bidirectional DC-DC converter breaks down, the Bypass Control System by triggering control function can be protected effectively Card battery system is directly connect with the high pressure of power drive system, and vehicle is allow to continue to move ahead.It is specific as follows:
As shown in Figure 1, a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle, including it is dcdc converter, inverse Becoming device, automobile power cell, fault detection circuit, bypass control circuit, bypass circuit, power battery is connect with bypass circuit, Bypass circuit is separately connected the input terminal of dcdc converter and the input terminal of inverter, and the output end of dcdc converter connects inversion The input terminal of device, fault detection circuit are used to detect the fault-signal of dcdc converter, and output end and bypass control circuit connect It connects, bypass control circuit controls bypass circuit after detecting DCDC fault-signal and power battery is connect and disconnected with inverter The connection of power battery and DCDC inverter.
In normal work, bypass circuit control power battery is connect by dcdc converter with inverter, at this time DCDC Converter accesses work, and power battery is exported by inverter after dcdc converter boosts and powered to motor, in the process, The working condition of fault detection circuit real-time detection dcdc converter, is sent to bypass control circuit after detecting fault-signal, Power battery directly connect with the input terminal of inverter by bypass control circuit control bypass circuit, disconnect dcdc converter and Connection between power battery ensure that and break down in dcdc converter so that the dcdc converter of failure is cut out work When, motor remains to powered operation.
Fault detection circuit implementation include it is a variety of, one, using measure voltage &amp, for detecting DCDC transformation The voltage and current signal etc. of device output end, according to current and voltage data to determine whether breaking down, data are transferred to bypass control Circuit processed is judged that bypass control circuit can be realized using the minimum system that single-chip microcontroller and peripheral circuit form, and data pass It is handed in single-chip microcontroller and carries out judgement and handle to obtain dcdc converter output abnormality, then the work of corresponding control bypass circuit. Two, since existing dcdc converter has substantially inherited fault detection work, therefore it may only be necessary to by the serial ports of single-chip microcontroller It is connect with the failure delivery outlet of the control chip in dcdc converter, obtains the fault-signal of DCDC chip self-test, connecing It receives and controls bypass circuit in time after fault-signal power battery is connect to inverter and disconnected power battery and the company of DCDC It connects, to ensure that the powered operation of motor, influence that the phenomenon that avoids sitting uses automobile.
As shown in Figure 2,3, bypass circuit includes contactor, and contactor includes coil KM and corresponding normally opened contact KM2, often Closed contact KM1, the one end normally opened contact KM2 connect power battery, and the other end connects the input terminal of inverter, and normally-closed contact KM1 is set It sets between power battery and dcdc converter, the coil KM power on/off of contactor described in bypass control circuit drive control.Often Closed contact KM1 is serially connected between the switching tube of dcdc converter and power battery.Due to normally-closed contact KM1 make power battery and When being in normally off between dcdc converter, that is, not breaking down, inversion is being passed through using ability after DCDC boosting always Device is motor power supply;After being powered after failure by the coil KM of MCU driving contactor, normally opened contact KM2 inhale and, Normally-closed contact KM1 is disconnected, in this way, power battery is connect after normally opened contact KM2 with inverter, is powered for motor.
Although remaining to powered operation by circuits bypass after failure, due to there is no DCDC boosting, in efficiency and Be not in performance it is best, therefore, it is necessary to overhaul DCDC in time, so need to allow user to learn DCDC failure at this time, therefore And warning function is set, bypass control circuit is connect with alarm, for issuing alarm signal after DCDC failure.Single-chip microcontroller is logical Buzzer of overdriving provides warning reminding, and user is facilitated to know DCDC failure, reminds for convenience, and alarm is integrated in instrument On, for issuing the alarm signal of DCDC failure.
Further, single chip circuit connects entire car controller by CAN bus, and vehicle control unit controls instrument issues DCDC Fault indication signal.DCDC malfunction indicator lamp is integrated in instrument, by full-vehicle control after the fault-signal uploaded by single-chip microcontroller Device control instrument provides indicating fault, so that the DCDC for facilitating user's timely learning to break down, facilitates user to drive in time Maintenance replacement avoids prolonged inefficient, low performance work.
When high-voltage bidirectional DCDC in normal work wait participate in high-tension circuit connection, while to come from high-voltage bidirectional DCDC Detection signal be monitored, when bidirectional DC/DC breaks down cisco unity malfunction, bypass control circuit according to detection signal The control of driving bypass contactor control circuit is closed bypass contactor, connection power battery and driving system circuit rapidly for variation, Bidirectional DC/DC power circuit is simultaneously switched off, it can be to avoid vehicle broken height pressure.Circuit includes: bidirectional DC/DC fault detection circuit, other Road contactor control circuit, bypass contactor, high-voltage bidirectional dcdc converter, inversion unit.
When circuit works normally, two normally-closed contacts of bypass contactor are connected on bidirectional DC/DC power conversion circuit and open Guan Guanyu bus cathode guarantees that circuit works normally, while bypass control circuit monitoring bidirectional DCDC working condition.
When bidirectional DC/DC power cell failure needs to carry out unit bypass operation, bypass control circuit will at once It issues signal and blocks main power cell switching tube driving signal, be simultaneously emitted by bypass control signal, contactor normally-closed contact KM1 is disconnected It opens, avoids because DC bus positive and negative anodes short-circuit conditions caused by the failures such as switching tube is straight-through occur, while normally opened contact KM2 is closed It closing, bus anode is shorted main power module and inversion unit connection below, the main power module to break down is detached from from system, System work below is not influenced.When high-voltage bidirectional DCDC removal of faults on system, bypass control circuit will enter normal monitoring state, The device state that resumes contacts works normally circuit.
Lifting/voltage reducing system reliability can effectively be increased using above technical scheme, guarantee to become in high-voltage bidirectional DCDC In the case of parallel operation breaks down, bypass circuit can be started automatically, guarantee that vehicle dynamical system still can work normally, avoid Because high-voltage bidirectional dcdc converter failure causes vehicle to be sat problem, security of system and reliability are improved.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using method concept and skill of the invention The improvement for the various unsubstantialities that art scheme carries out, it is within the scope of the present invention.

Claims (7)

1. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle, including dcdc converter, inverter, automobile power Battery, it is characterised in that: further include fault detection circuit, bypass control circuit, bypass circuit, the power battery and bypass are electric Road connection, the bypass circuit are separately connected the input terminal of dcdc converter and inverter, the output end of the dcdc converter The input terminal of inverter is connected, the fault detection circuit is used to detect the fault-signal of dcdc converter, output end and side The connection of road control circuit, the bypass control circuit control after detecting DCDC fault-signal bypass circuit by power battery and Inverter connects and disconnects the connection of power battery Yu DCDC inverter.
2. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle as described in claim 1, it is characterised in that: institute Stating bypass circuit includes contactor, and the contactor includes coil KM and corresponding normally opened contact KM2, normally-closed contact KM1, described The one end normally opened contact KM2 connects power battery, and the other end connects the input terminal of inverter, and the normally-closed contact KM1 setting is dynamic Between power battery and dcdc converter, the coil KM power on/off of contactor described in the bypass control circuit drive control.
3. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle as claimed in claim 1 or 2, feature exist In: the normally-closed contact KM1 concatenation is arranged between the switching tube of dcdc converter and power battery.
4. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle as claimed in claim 1 or 2, feature exist In: the bypass control circuit is connect with alarm, for issuing alarm signal after DCDC failure.
5. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle as claimed in claim 4, it is characterised in that: institute It states bypass control circuit and entire car controller is connected by CAN bus, the vehicle control unit controls instrument issues DCDC failure and refers to Show signal.
6. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle as claimed in claim 5, it is characterised in that: institute It states alarm to be integrated in instrument, for issuing the alarm signal of DCDC failure.
7. a kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle as described in claim 1, it is characterised in that: institute Stating fault detection circuit includes measure voltage &amp, for detecting the voltage and current signal of dcdc converter output end.
CN201910372786.2A 2019-05-06 2019-05-06 A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle Pending CN110103718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910372786.2A CN110103718A (en) 2019-05-06 2019-05-06 A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910372786.2A CN110103718A (en) 2019-05-06 2019-05-06 A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle

Publications (1)

Publication Number Publication Date
CN110103718A true CN110103718A (en) 2019-08-09

Family

ID=67488355

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910372786.2A Pending CN110103718A (en) 2019-05-06 2019-05-06 A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle

Country Status (1)

Country Link
CN (1) CN110103718A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101541136A (en) * 2009-03-13 2009-09-23 北京天地慧源节能电器有限公司 Lighting intelligent control system
CN202268801U (en) * 2011-10-13 2012-06-06 国电南京自动化股份有限公司 Power unit bypass circuit with redundancy control function
CN102624050A (en) * 2012-03-16 2012-08-01 成都宇能通能源开发有限公司 Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack
US8508066B2 (en) * 2009-10-27 2013-08-13 Hyundai Motor Company Emergency control apparatus and method for use
CN203611778U (en) * 2013-12-03 2014-05-28 潍柴动力股份有限公司 DC/DC monitoring device
CN104340082A (en) * 2013-08-07 2015-02-11 铃木株式会社 Fuel cell vehicle
EP3036127A1 (en) * 2013-10-02 2016-06-29 Siemens Aktiengesellschaft Protection device for a vehicle for preventing contact voltages
CN206797373U (en) * 2016-12-26 2017-12-26 重庆科米罗新能源汽车有限公司 A kind of entire car controller hardware integration system
CN109017313A (en) * 2018-08-02 2018-12-18 奇瑞汽车股份有限公司 Electric automobile high-voltage safety control system and method

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101541136A (en) * 2009-03-13 2009-09-23 北京天地慧源节能电器有限公司 Lighting intelligent control system
US8508066B2 (en) * 2009-10-27 2013-08-13 Hyundai Motor Company Emergency control apparatus and method for use
CN202268801U (en) * 2011-10-13 2012-06-06 国电南京自动化股份有限公司 Power unit bypass circuit with redundancy control function
CN102624050A (en) * 2012-03-16 2012-08-01 成都宇能通能源开发有限公司 Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack
CN104340082A (en) * 2013-08-07 2015-02-11 铃木株式会社 Fuel cell vehicle
EP3036127A1 (en) * 2013-10-02 2016-06-29 Siemens Aktiengesellschaft Protection device for a vehicle for preventing contact voltages
CN203611778U (en) * 2013-12-03 2014-05-28 潍柴动力股份有限公司 DC/DC monitoring device
CN206797373U (en) * 2016-12-26 2017-12-26 重庆科米罗新能源汽车有限公司 A kind of entire car controller hardware integration system
CN109017313A (en) * 2018-08-02 2018-12-18 奇瑞汽车股份有限公司 Electric automobile high-voltage safety control system and method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
卢标: "双电源自动转换开关旁路可行性分析", 《视听》 *
吴兴敏等: "《电动汽车构造、原理与检修》", 31 July 2015, 北京理工大学出版社 *
李敬福等: "《新能源汽车关键技术研究》", 31 December 2017, 北京理工大学出版社 *

Similar Documents

Publication Publication Date Title
CN205790155U (en) Battery bag and power system of electric automobile
CN105137336B (en) Detect the diagnostic method of electric automobile high-voltage relay failure
CN107662499B (en) Pure electric vehicle complete vehicle fault power-off control method and system
CN202923410U (en) High-voltage protection system of power battery and vehicle
CN203198756U (en) Monitoring and alarm device for electric car high-tension distribution system
CN102501771B (en) Control method for high voltage electricity safety protection of passenger vehicle
CN104133131B (en) A kind of IGBT driving malfunctions detection and diagnostic method
CN109606192A (en) Power supply system, method, apparatus and the storage medium of electric intelligent automobile
CN111152659B (en) Battery pack high-voltage topological structure and relay adhesion detection method based on structure
CN108437803A (en) A kind of low voltage control high pressure powering method of high speed new energy electric motor vehicle
CN108333503A (en) A kind of pure electric automobile high-voltage relay state detection circuit and method
CN109823285A (en) Electric system, power-on and power-off control method and control system above and below electric automobile high-voltage
CN110103718A (en) A kind of bypass protection system of high-voltage bidirectional DCDC for electric vehicle
CN108583286A (en) A kind of pure electric coach high pressure power-on and power-off strategy
CN109188266A (en) A kind of detection circuit and its detection method that high voltage negative relay is adhered
CN103770655A (en) High-voltage protection system of power battery and vehicle
CN202399925U (en) Intelligent protective device for faults of automobile circuit
CN112019040B (en) Direct current conversion control system and control method for electric automobile
CN109995306A (en) A kind of electric machine controller discharge control method and device
CN209264903U (en) A kind of insulation detecting circuit module and a kind of automatic alarm circuit
CN103600662A (en) High-voltage control management system used for super-capacitor pure electric passenger bus
CN207410016U (en) A kind of converter plant protective device
CN209675961U (en) A kind of pre-charging device for integrating PTC controller
CN105751904A (en) Connection device for power battery and super-capacitor of electric vehicle
CN203519737U (en) Electric vehicle test system possessing scram and insulation protection functions

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination