CN107402137A - Vehicle test system in a kind of electric automobile room - Google Patents
Vehicle test system in a kind of electric automobile room Download PDFInfo
- Publication number
- CN107402137A CN107402137A CN201710590569.1A CN201710590569A CN107402137A CN 107402137 A CN107402137 A CN 107402137A CN 201710590569 A CN201710590569 A CN 201710590569A CN 107402137 A CN107402137 A CN 107402137A
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- Prior art keywords
- electric automobile
- vehicle
- test system
- controller
- power
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- 238000012360 testing method Methods 0.000 title claims abstract description 65
- 238000004891 communication Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000009183 running Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 230000001360 synchronised effect Effects 0.000 claims description 19
- 230000001133 acceleration Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 4
- 230000009194 climbing Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses vehicle test system in a kind of electric automobile room, the system includes：Vehicle-mounted high/low voltage electrical system (1), facility communication system (2), power assembly test system (3), water circulation system and air circuit (4)；The vehicle-mounted high/low voltage electrical system (1) is used to power to the electric automobile；The facility communication system (2) is used to monitor vehicle running status, when there is operation troubles, searches and shows corresponding fault message；The power assembly test system (3) is used for the power output performance that the electric automobile is obtained by simulation test；The water circulation system and air circuit (4) are used to carry out cooling, and for controlling the brake system of the electric automobile.The present invention provides vehicle test system in a kind of electric automobile room, can effectively meet to research and develop and vehicle operation and controller key are debugged using personnel, and can rapidly find the failure problems occurred in running and solve.
Description
Technical field
The present invention relates to vehicle test system in electric automobile field of measuring technique, more particularly to a kind of electric automobile room.
Background technology
Energy shortage, oil crisis and environmental pollution grow in intensity, and the life to people brings tremendous influence, direct relation
To the sustainable development of national economy and society.Countries in the world are all in active development new energy technology.Electric automobile is as a kind of
Reduce consumption of petroleum, low stain, the new-energy automobile of low noise, it is considered to be solve the important way of energy crisis and environmental degradation
Footpath.Hybrid vehicle takes into account the advantage of pure electric automobile and traditional combustion engine automobile simultaneously, is meeting vehicle dynamic quality requirement
On the premise of continual mileage requirement, fuel economy is effectively improved, reduces discharge, it is considered to be currently saves and subtracts
One of active path of row.
With the rapid development of domestic New-energy electric vehicle, each parts and vehicle reliability of operation, stability, peace
Full property has obtained the extensive concern of industry.
" a kind of test system of power system of electric automobile as disclosed in Publication No. CN106092603A patent document
And electric automobile ", a kind of disclosure of the invention test system and electric automobile of power system of electric automobile.Electric powered motor
System includes frequency converter and the power motor being connected with frequency converter, and test system includes：Vehicle mounted dynamic battery, the onboard power
The input of the output end connection frequency converter of battery；Heat management pipeline, for performing heat management to vehicle mounted dynamic battery；With it is vehicle-mounted
The quick charger of electrokinetic cell connection；The load motor being connected with power motor；Power analyzer, with vehicle mounted dynamic battery
The output end of output end, the output end of frequency converter and power motor connects respectively.
And for example " power system of electric automobile test device " disclosed in Publication No. CN106441925A patent document, should
Invention is related to a kind of test device, more particularly to a kind of power system of electric automobile test device.The power system of electric automobile
Test device, including dynamometer machine, it is characterized in that：The dynamometer machine is connected with frequency converter, and dynamometer machine is connected with torquemeter, turns round
Square instrument is connected with testing of electric motors, and testing of electric motors is connected with electric machine controller, electric machine controller and dc source or electrokinetic cell
Group is connected, and dc source is connected with energy back feed device.
It is mostly test system/device to power system of electric automobile in the prior art, there is no to pure electronic whole
Car includes the operation of its key components and parts and carries out the indoor stand of Validity Test, or because is limited to enter by vehicle space
OK.
The content of the invention
In view of the above-mentioned state of the art, the technical problems to be solved by the invention are to provide a kind of electric automobile room
Interior vehicle test system, Validity Test can be carried out to electric automobile whole.
Technical scheme is used by the present invention solves above-mentioned technical problem：
Vehicle test system in a kind of electric automobile room, including：Vehicle-mounted high/low voltage electrical system (1), facility communication system
(2), power assembly test system (3), water circulation system and air circuit (4)；
The vehicle-mounted high/low voltage electrical system (1) is used to power to the electric automobile；
The facility communication system (2) is used for the vehicle running status for monitoring the electric automobile, when the electric automobile
When there is operation troubles, search and show corresponding fault message；
The power assembly test system (3) is used for the power output that the electric automobile is obtained by simulation test
Energy；
In the water circulation system and air circuit (4), the water circulation system is used to carry out cooling, the air circuit
For controlling the brake system of the electric automobile.
The vehicle-mounted high/low voltage electrical system (1) includes a frequency converter, for indoor three-phase low-voltage alternating current to be converted to
High voltage direct current, in order to be returned for the facility communication system (2), power assembly test system (3) and water circulation system and gas
Road (4) powers；
The vehicle-mounted high/low voltage electrical system (1) also includes a DCDC modules, for the high voltage direct current to be converted to
Low-voltage DC, in order to be the low tension battery charging in the electric automobile.
The facility communication system (2) includes：Entire car controller, instrument board, electronics foot valve, E-Gas, four-in-one control
Device processed, battery management system, electric machine controller, electronics water tank；
Multiple equipment in the facility communication system (2) is connected by CAN communication.
CAN analyzers or entire car controller monitoring software are accessed by the communication terminal in the entire car controller, obtain institute
State entire car controller and the message of other equipment in the system in facility communication system (2) to communicate, so as to monitor the electronic vapour
The vehicle running status of car.
When there is operation troubles in the electric automobile, the vehicle running status of the electric automobile obtained by analysis monitoring
Information, fault message is obtained, and failure code corresponding to the fault message is shown in the instrument board.
The power assembly test system (3) includes：Asynchronous machine, torque sensor, power transmission shaft, permagnetic synchronous motor,
Electric machine controller, programmable logic controller (PLC) and touch-screen；
The permagnetic synchronous motor and asynchronous machine are fixedly installed on testboard bay, are tested by mechanical back to back test described electronic
The power output performance of automobile.
Described pair is dragged the test to be specially：
The permagnetic synchronous motor and asynchronous machine are connected to realize to dragging by power transmission shaft and torque sensor；
By the control panel of electric machine controller, or, by the brake of the electric automobile, throttle, described in control forever
Rotating, acceleration, deceleration, output torque and the frequency of magnetic-synchro motor；
The reverse output torque of the asynchronous machine is controlled by programmable logic controller (PLC) and touch-screen, obtains the electricity
The power output performance of electrical automobile.
The power performance includes：Startability, acceleration, level land runnability, grade climbing performance and downhill performance.
Described pair is dragged in test process, electric powered motor described in the control panel real-time display in the electric machine controller
The corresponding parameter of output performance.
In the water circulation system and air circuit (4), the water circulation system is used for the permagnetic synchronous motor and electricity
Machine controller carries out cooling,
The air circuit is used to control the parking brake for opening the electric automobile, and the brake system of the control electric automobile
System.
The present invention provides vehicle test system in a kind of electric automobile room, can effectively meet to research and develop and using personnel to whole
Car is run and controller key is debugged, and can rapidly be found the failure problems occurred in running and be solved.
Brief description of the drawings
Fig. 1 is vehicle test system structure figure in a kind of electric automobile room of the present invention.
Embodiment
It is the specific embodiment of the present invention and with reference to accompanying drawing below, technical scheme is further described,
But the present invention is not limited to these embodiments.
Fig. 1 is vehicle test system structure figure in a kind of electric automobile room of the present invention, as shown in figure 1, the system includes：Car
Carry high-low pressure electrical system (1), facility communication system (2), power assembly test system (3), water circulation system and air circuit
(4)；
The vehicle-mounted high/low voltage electrical system (1) is used to power to the electric automobile；
The facility communication system (2) is used for the vehicle running status for monitoring the electric automobile, when the electric automobile
When there is operation troubles, search and show corresponding fault message；
The power assembly test system (3) is used for the power output that the electric automobile is obtained by simulation test
Energy；
In the water circulation system and air circuit (4), the water circulation system is used to carry out cooling, the air circuit
For controlling the brake system of the electric automobile.
The vehicle-mounted high/low voltage electrical system (1) includes a frequency converter, for indoor three-phase low-voltage alternating current to be converted to
High voltage direct current, in order to be returned for the facility communication system (2), power assembly test system (3) and water circulation system and gas
Road (4) powers；
The vehicle-mounted high/low voltage electrical system (1) also includes a DCDC modules, for the high voltage direct current to be converted to
Low-voltage DC, in order to be the low tension battery charging in the electric automobile.
In the present invention, vehicle-mounted high/low voltage electrical system directly draws indoor three-phase 380V alternating currents, by frequency converter, obtains
540V DC voltages replace vehicle-mounted high voltage power battery (voltage swing can be adjusted by pressure regulator), are input to equipment communication
Four-in-one controller in system (2), HVDC is converted to for the low-voltage direct required for low tension battery by DCDC,
Charged for low tension battery on car, so as to be powered for vehicle-mounted low-voltage electric system, while four-in-one controller directly draws bus electricity
Pressure is output to electric machine controller dc bus end, and electric machine controller exports three-phase alternating current to vehicle-mounted permagnetic synchronous motor, and same
Step motor is then directly powered to the asynchronous machine dragged by the three-phase alternating current of frequency converter output.
The facility communication system (2) includes：Entire car controller, instrument board, electronics foot valve, E-Gas, four-in-one control
Device processed, battery management system, electric machine controller, electronics water tank；
Multiple equipment in the facility communication system (2) is connected by CAN communication.
CAN analyzers or entire car controller monitoring software are accessed by the communication terminal in the entire car controller, obtain institute
State entire car controller and the message of other equipment in the system in facility communication system (2) to communicate, so as to monitor the electronic vapour
The vehicle running status of car.
When there is operation troubles in the electric automobile, the vehicle running status of the electric automobile obtained by analysis monitoring
Information, fault message is obtained, and failure code corresponding to the fault message is shown in the instrument board.
In the present invention, facility communication system is using entire car controller as core, by instrument board, electronics foot valve, E-Gas, four
The equipment such as in-one controller, BMS, electric machine controller, electronics water tank are linked together by CAN communication, complete so as to form one
Whole communication system.
By this communication system, vehicle platform has the upper electric current journey of complete set, and key gets to ON shelves, the low pressure of vehicle
System electrification is the power supply such as master control borad power supply of instrument board, each controller, and key gets to START shelves, and four-in-one controller is always born
Contactor adhesive-charging contactor adhesive-preliminary filling contactor adhesive-main contactor adhesive-preliminary filling contactor disconnects, high pressure
System electrification is completed, and on whole during electricity, any one link, which goes wrong, can all cause electric failure, pass through vehicle
Controller is clearly fed back on instrument board, and shows corresponding failure code, instructs solve problem using personnel.
Such as pre-charging time is less than 2s, preliminary filling does not complete, and causes electricity failure in high pressure, can be shown on instrument board corresponding
Failure code.
By this communication system, research and develop, simply directly can be completed using personnel with throttle, brake, driving switch
Acceleration and deceleration, the rotating of permagnetic synchronous motor, instrument board can clearly indicate the running status of vehicle various pieces, simultaneously will
The communication terminal of CAN analyzers or other entire car controller monitoring softwares access entire car controller, can receive full-vehicle control
Message communication between the kernel components such as device, electric machine controller, monitors vehicle running status, can be fast once breaking down
It is fast efficient to pinpoint the problems and solve problem.
The power assembly test system (3) includes：Asynchronous machine, torque sensor, power transmission shaft, permagnetic synchronous motor,
Electric machine controller, programmable logic controller (PLC) and touch-screen；
The permagnetic synchronous motor and asynchronous machine are fixedly installed on testboard bay, are tested by mechanical back to back test described electronic
The power output performance of automobile.
Described pair is dragged the test to be specially：
The permagnetic synchronous motor and asynchronous machine are connected to realize to dragging by power transmission shaft and torque sensor；
By the control panel of electric machine controller, or, by the brake of the electric automobile, throttle, described in control forever
Rotating, acceleration, deceleration, output torque and the frequency of magnetic-synchro motor；
The reverse output torque of the asynchronous machine is controlled by programmable logic controller (PLC) and touch-screen, obtains the electricity
The power output performance of electrical automobile.
The power performance includes：Startability, acceleration, level land runnability, grade climbing performance and downhill performance.
Described pair is dragged in test process, electric powered motor described in the control panel real-time display in the electric machine controller
The corresponding parameter of output performance.
It is different by permagnetic synchronous motor in the case that power assembly test system can not use tire indoors in the present invention
Step motor etc. is fixed on stand, and by the power output to dragging measurement vehicle, simulated machine is under different road resistance situations
Properties.Whole power assembly test system is by asynchronous machine, torque sensor, power transmission shaft, permagnetic synchronous motor, motor
Controller, PLC and touch-screen are formed, and permagnetic synchronous motor and threephase asynchronous machine are connected to by power transmission shaft and torque sensor
Realize together to dragging, by the control panel of electric machine controller or brake, throttle, control permagnetic synchronous motor rotating and
Acceleration and deceleration and output torque and frequency, and the reverse output torque of asynchronous machine can be changed by PLC and touch-screen, so as to
Realize to automobile starting, acceleration, level land operation, grade climbing performance, downhill performance simulation test, in the process of power system operation
Central, by motor controller controls panel, torque measurer can be with visible in detail among different runnings, vehicle
The detail parameters of power output.
In the water circulation system and air circuit (4), the water circulation system is used for the permagnetic synchronous motor and electricity
Machine controller carries out cooling, and the air circuit is used to control the parking brake for opening the electric automobile, and the control electricity
The brake system of electrical automobile.
In the present invention, water circulation system and air circuit are responsible for the cooling of electric machine controller, permagnetic synchronous motor, and control is stopped
Car.Water circulation system includes electric control pump, electric machine controller, main drive motor, electronics water tank, water circulation as cooling system,
When motor operation, cooling water is started to warm up, and when motor and electric machine controller detect water temperature over-high, electronics water tank is received and come from
The PWM ripple signals of entire car controller, the radiator fan of electronics water tank is adjusted to flowing through electronic water by controlling PWM ripples dutycycle
The current of case are radiated.
Air circuit includes automatically controlled air compressor machine, air conditioner unit, gas tank and brake, air compressor machine compressed air, into dry
Air moisture is filtered in dry device, is sent into gas tank storage, is braked for opening parking brake and control.
Scheme is by vehicle-mounted high/low voltage electrical system, facility communication system, moved used by the present invention solves technical problem
Power assembly test system, water circulation system and air circuit form a test system with height emulation testing value, are whole
The research and development and performance test of car key components and parts provide platform.
The present invention provides vehicle test system in a kind of electric automobile room, can effectively meet to research and develop and using personnel to whole
Car is run and controller key is debugged, and can rapidly be found the failure problems occurred in running and be solved.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (10)
- A kind of 1. vehicle test system in electric automobile room, it is characterised in that including：Vehicle-mounted high/low voltage electrical system (1), equipment Communication system (2), power assembly test system (3), water circulation system and air circuit (4)；The vehicle-mounted high/low voltage electrical system (1) is used to power to the electric automobile；The facility communication system (2) is used for the vehicle running status for monitoring the electric automobile, when the electric automobile occurs During operation troubles, search and show corresponding fault message；The power assembly test system (3) is used for the power output performance that the electric automobile is obtained by simulation test；In the water circulation system and air circuit (4), the water circulation system is used to carry out cooling, and the air circuit is used for Control the brake system of the electric automobile.
- 2. vehicle test system in a kind of electric automobile room as claimed in claim 1, it is characterised in that the vehicle-mounted high/low voltage Electrical system (1) includes a frequency converter, for indoor three-phase low-voltage alternating current to be converted into high voltage direct current, in order to be described Facility communication system (2), power assembly test system (3) and water circulation system and air circuit (4) power supply；The vehicle-mounted high/low voltage electrical system (1) also includes a DCDC modules, for the high voltage direct current to be converted into low pressure Direct current, in order to be the low tension battery charging in the electric automobile.
- 3. vehicle test system in a kind of electric automobile room as claimed in claim 1, it is characterised in that the equipment communication system System (2) includes：Entire car controller, instrument board, electronics foot valve, E-Gas, four-in-one controller, battery management system, motor Controller, electronics water tank；Multiple equipment in the facility communication system (2) is connected by CAN communication.
- 4. vehicle test system in a kind of electric automobile room as claimed in claim 3, it is characterised in that by the vehicle The communication terminal access CAN analyzers or entire car controller monitoring software of controller, obtain vehicle in the facility communication system (2) Controller and the message of other equipment in the system communicate, so as to monitor the vehicle running status of the electric automobile.
- 5. vehicle test system in a kind of electric automobile room as claimed in claim 4, it is characterised in that when the electric automobile When there is operation troubles, the vehicle running state information of the electric automobile obtained by analysis monitoring, acquisition fault message, and in The instrument board shows failure code corresponding to the fault message.
- 6. vehicle test system in a kind of electric automobile room as claimed in claim 1, it is characterised in that the power assembly is surveyed Test system (3) includes：Asynchronous machine, torque sensor, power transmission shaft, permagnetic synchronous motor, electric machine controller, FPGA control Device and touch-screen processed；The permagnetic synchronous motor and asynchronous machine are fixedly installed on testboard bay, and the electric automobile is tested by mechanical back to back test Power output performance.
- 7. vehicle test system in a kind of electric automobile room as claimed in claim 6, it is characterised in that described pair is dragged test to have Body is：The permagnetic synchronous motor and asynchronous machine are connected to realize to dragging by power transmission shaft and torque sensor；By the control panel of electric machine controller, or, by the brake of the electric automobile, throttle, control the permanent magnetism same Walk rotating, acceleration, deceleration, output torque and the frequency of motor；The reverse output torque of the asynchronous machine is controlled by programmable logic controller (PLC) and touch-screen, obtains the electronic vapour The power output performance of car.
- 8. vehicle test system in a kind of electric automobile room as claimed in claim 7, it is characterised in that the power performance bag Include：Startability, acceleration, level land runnability, grade climbing performance and downhill performance.
- 9. vehicle test system in a kind of electric automobile room as claimed in claim 7, it is characterised in that described pair is dragged and tested Cheng Zhong, the corresponding parameter of electric powered motor output performance described in the control panel real-time display in the electric machine controller.
- 10. vehicle test system in a kind of electric automobile room as claimed in claim 6, it is characterised in that the water circulation system In system and air circuit (4), the water circulation system is used to carry out cooling to the permagnetic synchronous motor and electric machine controller；The air circuit is used to control the parking brake for opening the electric automobile, and the brake system of the control electric automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710590569.1A CN107402137A (en) | 2017-07-19 | 2017-07-19 | Vehicle test system in a kind of electric automobile room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710590569.1A CN107402137A (en) | 2017-07-19 | 2017-07-19 | Vehicle test system in a kind of electric automobile room |
Publications (1)
| Publication Number | Publication Date |
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| CN107402137A true CN107402137A (en) | 2017-11-28 |
Family
ID=60402216
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710590569.1A Pending CN107402137A (en) | 2017-07-19 | 2017-07-19 | Vehicle test system in a kind of electric automobile room |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362505A (en) * | 2018-01-30 | 2018-08-03 | 上海大学 | A kind of full working scope dynamic vehicle testboard bay and method |
| CN111678710A (en) * | 2020-06-19 | 2020-09-18 | 上海蔚来汽车有限公司 | Power assembly test system of vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092604A (en) * | 2016-06-25 | 2016-11-09 | 浙江合众新能源汽车有限公司 | A kind of new-energy automobile power assembly tests system |
| CN106769091A (en) * | 2016-12-20 | 2017-05-31 | 上海中科深江电动车辆有限公司 | The detecting system of electric automobile power battery system |
| CN207197824U (en) * | 2017-07-19 | 2018-04-06 | 浙江新富凌电气股份有限公司 | Vehicle test system in a kind of electric automobile room |
-
2017
- 2017-07-19 CN CN201710590569.1A patent/CN107402137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106092604A (en) * | 2016-06-25 | 2016-11-09 | 浙江合众新能源汽车有限公司 | A kind of new-energy automobile power assembly tests system |
| CN106769091A (en) * | 2016-12-20 | 2017-05-31 | 上海中科深江电动车辆有限公司 | The detecting system of electric automobile power battery system |
| CN207197824U (en) * | 2017-07-19 | 2018-04-06 | 浙江新富凌电气股份有限公司 | Vehicle test system in a kind of electric automobile room |
Non-Patent Citations (1)
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| 朱军等, 上海科学技术出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111678710A (en) * | 2020-06-19 | 2020-09-18 | 上海蔚来汽车有限公司 | Power assembly test system of vehicle |
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Application publication date: 20171128 |