Depth: study and judge the status of BYD dolphin integrated thermal management control technology (strategy)

Wechat automobile 2021-08-11 17:30:16 阅读数:782

本文一共[544]字,预计阅读时长:1分钟~
depth study judge status byd
The maximum surface temperature of the new energy information analysis network reaches 67 Degrees Celsius in Turpan, Xinjiang , Follow BYD Engineering Institute and Planning Institute to form a joint test team , There are several dolphins in non production status 、 element PLUS、 han DM-i\EV、 The tang dynasty DM-i\EV Song Dynasty PLUS DM-i\EV Wait for the car to be quiet / dynamic 、 New flat wire winding electric drive system 、 Highly integrated blade battery system 、 Integrated thermal management control strategy and other subsystems under DC fast charging condition , Omnidirectional test was carried out .
This paper will focus on the non mass production status e platform 3.0 Integrated thermal management and control technology under architecture ( Strategy ), Study and judge the performance of high-power DC fast charging in high-temperature environment .
remarks : The dolphins are not in mass production , Cover for high temperature environment appearance 、 Interior trim assembly 、8 Integrated intelligent front drive electric assembly 、 Technical verification of electrical subsystem of integrated thermal management control system . For the final technical status of dolphins , The information officially released by BYD will prevail .
Basically, it can be confirmed that , Dolphin and several other models ( Appeared in the joint test team of BYD Engineering Institute and Planning Institute ) Have been applied to varying degrees e platform 3.0 Different subsystems of the architecture .
stay 《“ really - The horse pulls the car ”! Study and judge BYD dolphin flat wire motor + Domain control technology status 》 It is mentioned in the article that , Dolphin adaptation in multiple tests 1 Set carrying 70 kw 、1XX Kilowatt class 8 Integrated intelligent front drive electric assembly . actually ,e platform 3.0 Integrated thermal management and control technology in the architecture , It is also applied to dolphins .
The above figure is a close-up of the technical status of each subsystem of the front power cabin of the dolphin technical verification vehicle in non mass production status .
Blue arrow :1XX Kilowatt class 8 Integrated intelligent front drive electric assembly
The red arrow : Multi channel valve body in integrated heat management system based on heat pump electric air conditioning
Yellow arrow : Electric drive system circulating pipeline replenishing kettle
The green arrow :IPB( Integrate ABS Electro hydraulic integration of valve body ) Brake fluid refilling pot for brake system
The above figure is a close-up of the technical status of each subsystem of the front power cabin of a technical verification vehicle with the same driving technical scheme as the dolphin .
Blue arrow :1XX Thousand level 8 Integrated intelligent front drive electric assembly
Red area : Multi channel valve body in integrated heat management system based on heat pump electric air conditioning
Yellow arrow : Electric drive system circulating pipeline replenishing kettle
White arrow : BYD's self-developed and mass-produced heat pump electric air conditioning compressor ( The specific model will be disclosed later )
The detailed status of each subsystem of dolphin power cabin can be seen ,8 Integrated intelligent front drive electric assembly 、 Integrated thermal management system 、 Distribution of air conditioning lines fixed to the firewall , Almost exactly the same . Even if the setting position of the rehydration pot is different , However, the spare parts of the monomer are completely the same .
General power cabin subsystem setting , Modular electric drive and integrated thermal management IPB System settings , Ensure that the quality and performance of different models are highly consistent to the greatest extent .
The above picture is a close-up of the thermal management integration module manufactured by BYD Changsha factory . The integrated thermal management system is mainly divided into multi-channel valve body at the upper end , The water cooling plate control module and the electric control module at the lower end , Three parts .
Yellow area : Multi channel valve body of integrated thermal management system
Red area : The heat exchanger at the lower end of the integrated heat management valve body
The green arrow :8 The group controls the air conditioning lines “ Opening and closing ” State of the electromagnetic valve body
White arrow : Air conditioning pipeline associated with heat pump electric air conditioning compressor
stay 2021 year 4 month , New energy information analysis network released 《 depth : Study and judge BYD e platform 3.0 Architecture and technical status of integrated thermal management system 》 One article ;
stay 2021 year 6 month , New energy information analysis network released 《 depth : Study and judge BYD e platform 3.0 Integrated thermal management ( Based on refrigerant ) System technical status 》 One article ;
These two manuscripts are combined with bits of fragment information officially released by BYD , According to the actual technical state of integrated thermal management control valve body in non loading state .
It should be noted that (1), Integrated at the lower end of the valve body 1 Group water cooling plate control module . According to the characteristics of integrated thermal management control technology , The multi-channel valve body is associated with the electric compressor , Cold and heat exchange through refrigerant . The water cooling plate control module is associated with the assembly requiring high-temperature heat dissipation servo , Cold and heat exchange through coolant .
Yellow arrow : Water cooling plate control module of integrated thermal management system
The red arrow : Water cooling plate control module coolant circulation interface ( One in, one out )
Blue arrow : The multi-channel valve body of the integrated heat management system exchanges cold and heat with the water cooling plate control module through the refrigerant circulation pipeline
However , Confirm... Only by means of exhibition tools e platform 3.0 Technical characteristics and control strategy of integrated thermal management system under architecture , There are still some uncertainties .
By comparing the actual loading technical status of each system in the power cabin , The multi-channel valve body at the upper end of the integrated thermal management system , Through up to 10 The remaining groups of air conditioning pipelines are respectively connected with the heat pump electric air conditioning compressor , The cockpit is associated with the blade battery system ; Water cooling plate control module and 8 The utility model is composed of an integrated intelligent front drive electric assembly 1 A complete high temperature heat dissipation pipeline .
It can be confirmed through the technical status of non mass production dolphin real vehicle , The integrated thermal management system is a large-scale system “ Quantity of heat ” and “ Cooling capacity ” Exchange assembly .
The multi-channel valve body at the upper end depends on the temperature requirements of the cockpit and blade battery , stay 8 Real time communication between channels “ Switch ” Refrigerants with different flow rates are used for cooling or heating the cockpit 、 Used for heat dissipation or preheating of blade battery .
The water cooling plate control module at the lower end , The upper multi-channel valve body can be introduced when necessary “ Cooling capacity ” Used to cool the coolant flowing through , In order to 8 The integrated intelligent front drive electric assembly provides more efficient active heat dissipation .
It should be noted that (2), The mainstream on sale now EV The electric drive system of the vehicle only has the function of passive heat dissipation through the radiator ; BYD e platform 3.0 Integrated thermal management and control technology under architecture ( Strategy ), It can provide accurate information for electric drive system in real time “ Cooling capacity ” Active cooling servo capability .
The figure above shows the heat pump electric air conditioning compressor ( Red arrow ) Close up of actual loading status .
thus , This product is developed and mass produced by BYD , The number is FD28HA Heat pump electric air conditioning compressor , Will be adapted to dolphins and others based on e platform 3.0 There is no suspense .
What's interesting is that , The new exhibition hall at BYD Pingshan base in Shenzhen has long been displayed FD28HA Heat pump electric air conditioning compressor ( Red area ), And another new state BC34 Series electric air conditioning compressor .
It should be noted that (3), BYD's self-developed electric air conditioning compressor has BC28、BC34、BC36( unconfirmed ) as well as FD28 Four series . among BC28 It is an electric air conditioning compressor suitable for Great Wall Euler white cat ,BC34 For Euler cat models .
The maximum temperature on the surface exceeds 67 Turpan in degrees Celsius ( In the afternoon 1 spot ), Conduct DC fast charging test under high temperature condition for dolphins in non mass production state . Before charging test , We've been driving dolphins 1 Hours of full load road driving , And set the temperature of the cockpit air conditioning system at 24 Centigrade 、2 Block out the air volume .
The pen is used to test dolphins in non production status 150 Kilowatts and 60 During kW DC charging test , Through the software of BYD Engineering Institute, the power battery is in different positions SOC Value of charging efficiency 、 The time node accessed by the integrated thermal management control system and the allocated power and other data .
In the State Grid 60 KW DC charging pile for charging test of non production dolphins , Starting power battery SOC The value is 47%、 Charging about 14 Seconds later “ Power battery intelligent temperature control system ” Activate , That is, start the high-temperature heat dissipation of the blade battery . The maximum charging power at the pile end is 60 kw , Partial charging power shunting is used for the integrated thermal management system at the vehicle end , Therefore, the charging power displayed at the vehicle end is 32.5 kw .
It should be noted that (4), High power DC charging test in high temperature environment , The vehicle end is in “ Power on ” state ( Cockpit air conditioning is off ).
When the high temperature heat dissipation function is turned on , The valve body of dolphin integrated thermal management system in non mass production state can be seen through the thermal imager ( White arrow ) Part of the temperature is about 70 Centigrade ; Air conditioning lines fixed to the firewall ( The yellow arrow indicates ) Part of the temperature is about 27-29 Centigrade .
actually , Set up 8 The water cooling plate control module in the circulation pipe of the integrated intelligent front drive electric assembly ( Fixed at the lower end of the integrated thermal management system ) The internal coolant temperature is at 90 Above centigrade , Even if the whole car “ Power on ” After and during charging , Circulating heat dissipation will also be carried out .
therefore , The thermal imager shows that the valve body temperature of the integrated thermal management system is too high .
Working mode of heat pump electric air conditioning system :
In low temperature environment will “ Carry ” The heat generated in the energy process is sent to the cockpit for heating 、 To power battery for preheating ;
In high temperature environment will “ Carry ” The cooling capacity generated in the energy process is sent to the cockpit for refrigeration 、 To power battery for heat dissipation ;
I have something to say :
At present, the integration of electric drive system is rising , From the initial “2 close 1”、“3 close 1” Integrate , Until then “8 close 1” Highly integrated , This has a more demanding demand for the heat dissipation efficiency of the whole system . meanwhile , Flat wire winding technology shall be applied to drive motor 、 Speed up to 15000-16000 turn / branch , The universal application of oil cooling technology , Direct integration of electronic water pump and heat exchange module with electric drive assembly is a common solution .
As from the power battery 、 Electric drive system 、 Integrated thermal management and control technology including valve body and compressor 、 BYD, the manufacturer at the vehicle level , stay e platform 3.0 At the beginning of architecture research and development, it is related to the model to be adapted .
In the dolphin integrated 2 Power level 8 Integrated intelligent front drive electric assembly , Standard configuration “1 Slot 6 Line ” Flat wire winding technology , The electronic water pump and heat exchange module are integrated into the integrated heat management system .
in consideration of 8 Integrated intelligent front drive electric assembly , By removing the electric drive control at the upper end 、DCDC、OBC、PDU、BMS and VCU Electronic control unit , Replace 1 A group of electronic control modules can be formed “3 close 1” Electric drive assembly . Before and after “8 close 1” And “3 close 1” Electric drive system , Can be formed into 1 A complete set of electric 4WD system .
So the cockpit 、 Power battery and 1/2 Required for group electric drive system “ Quantity of heat ” and “ Cooling capacity ” Integrated management of active servo demand , Minimize the complexity of the structure 、 Improvement of efficiency and control of safety .
Through non mass production dolphins and other models under high temperature test in Turpan ,e platform 3.0 The architecture will be extended to match different technical states and models at different prices . I believe that other models will be launched in the future ( Modification of existing models ) Will be fully used e platform 3.0 Under the framework of 8 Integrated intelligent front drive electric assembly ( Calibrate the corresponding power according to the vehicle model )、 Blade battery system with different voltage platforms , And integrated thermal management control technology ( Strategy ) It will also focus on low-temperature heating / The preheating efficiency is improved accordingly .
To be continued ....
Produced by the evaluation team of new energy information analysis network
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