January 11, 2021, BYD released a new DM-I super mixing platform. A special high-efficiency engine (电 骁-1.混 专用 1.5L high-efficiency engine or inexplicrature-based special turbine boost 1.5Ti high-efficiency engine), 1 group consists of drive motor and generator “2” Dual Motor EHS Mixing System, 1 large-capacity high-power DM-I super mixed special power type blade battery, which constitutes a hundred kilometers of fuel consumption of 3.8 liters, and the main sub-system system of Qin Plus in Qin PLUS in the comprehensive endurance mileage.
As a DM model, the power source of Qin Plus (including Song Plus and Tang Plus) is the inenthesis of the cloud series, which is used for the film. The adapted DM-I super mixed special power type blade battery is used for In the “regulatory” fuel efficiency and electric drive efficiency in the EHS electric mixing system.
Adapted to Qin Plus DM-I super mixed special power blade battery load charge from 8.3-21.5 degrees, or even 46 degrees, this set of DM-I super mixed special power blade battery is unique Thermal management control technology (strategy) exceeds the 2021 Tang DM, Han DM and Han EVs sold in the sale.
Previously, the new energy intelligence analysis network has released “depth: Jie Di Qin Plus Xiaoyun – Mixed Special 1.5 Engine Technology”, “Question: BYD DM-I The EHS Clearing System Technology Advantage of the Super Mixing Platform “is two articles, and the engine and EHS electric mixing system are technically interpreted. This article will study and decide the status of BYD DM-I super mixed special power blade battery, new thermal management control technology (self-heating and direct cooling). 
1, DM-I super mixed special power type blade battery self-heating technology (control strategy):
BYD gives DM-I super mix A new definition of a special power blade battery: the world’s first power battery with pulse from heating technology. This new pulse self-heating technology is based on the active control electrical cell high frequency charge discharge, so that heat is generated inside the battery cell to achieve self-heating effect.
In other words, as long asStarting the vehicle, the DM-I super mixed special power blade battery activates the self-heating function (depending on the external temperature). Under the monitoring of the BMS system, the no-cell cell is detected. Once a set of batches fluctuate in unit time, the BMS system is immediately intervened or reducing the output power or directly opening the direct cooling system, and acts an active high-temperature heat dissipation servo to the entire power battery assembly.
Currently, BYD officially released on DM-I super mixed special power blade battery pulses self-heating technical data is very limited, and its working principle is also very general. However, this self-heating technology is similar to the 2017 “General” battery preheating strategy jointly developed by Northern Automobile New Energy and a cell manufacturer. A special nickel material is added to the battery cell, heating the ear and the heating control switch, and covers the insulation layer. Once the vehicle starts the battery system discharge, the electrical core flows through the nickel material, which will generate heat for low temperature preheating servo. This “climate” battery can run at -45 degrees Celsius and automatically shut down in 0 degrees Celsius, or the system is set to stop at a suitable specified temperature.
Although the BYD’s DM-I super mixed special power type blade battery and self-heating management technique are not available, whether there is a blade battery suitable for models such as Han EV. Larger technical differences. However, Qin Plus, which is 107,800 yuan, is used to replace the market positioning of traditional fuel vehicles, and the cost of DM-I super mixed special power blade batteries and self-heating management technology will not have a huge potential.
It is to be noted that the DM-I super mixed special power blade battery of BYD is activated by the self-heating function, and the overall temperature is more thermostat (battery system) Better, the temperature rise efficiency is increased by about 10%, and can be tested by “puncture” testing on safety performance requirements.
2, DM-I super mixed special power type blade battery direct cooling heat technology: 
Blade battery for EV model and DM -i blade battery, in essence, phosphoric acidLithium material and large dielectric core shape. However, the DM-I super mixed special power type blade battery (referred to as referred to as the inner series multi-group small monomer (referred to as the yellow arrow).
DM-I Super Mixed Special Power Skirt Battery Longitudinally Place in the Battery Assembly Interior (Han EV blade battery cell horizontally in the battery assembly interior ). This kind of monomer is very obvious from the advantages of “horizontal retrograde”, not only increases volume density, but also increases the length of the monomer. The voltage of each blade battery is calibrated in 20 volts, theoretically, by different quantities in series, a higher voltage platform is obtained.
Red Arrow: Core in the interior of DM-I super mixed special power blade battery
Yellow arrow: DM-I super mixed special power blade battery assembly The front end of the internal, used for BMS and control cable wrap
Blue arrow: The front end of the DM-I super mixed dedicated power blade battery assembly is used to secure the lead from the BC series electric compressor
shows the internal structure of the DM-I super mixed special power type blade battery, located in the battery The uppermost end of the housing is laid a layer of cold plates; it is a slight blade battery cell; which is a tray (lower housing and thermal level), which is a guard plate on the outside of the outer casing (tray). 
Red Arrow: Hard tube from the BC series electric air conditioner compressor – “pump” into the blade battery assembly “pump” into the input of “cold amount” refrigerant
Blue arrow : Carry the output of the “heat” refrigerant in the blade battery – to BC series electric air conditioner compressor
White arrow: on the top of the cold plate, completed by the BC series electric air conditioner compressor and two The pipeline completes “cold amount” and “heat” exchange full process
, the above picture shows the DM-I super mixed special power type blade battery assembly front end of Qin Plus Many interface technology status detail close-up.
Orange Arrow: Positive Vice High Pressing Cable Merged BundlesPipe, seal and fixed
red arrow: air-conditioned expansion body fixed at the front end of the housing 
Blue arrow: Air conditioning line from the BC series electric air conditioner compressor (1 into 1 out
The cross-shaped blade battery cell operates in a high temperature environment, resulting in heat rising to the top of the cold plate, the refrigerant in the air conditioner in the BC series The electric control compressor servo has completed the exchange of “cold amount” and “heat” to achieve the technical setting of the active high temperature heat dissipation servo.
The above picture shows the blade battery and filling special low conductivity electrolyte thermal management cycle system in Han EV (opening low temperature preheating function).
White arrow: PTC control module is in heating
Green arrow: low conductivity coolant is heated
Han EV and other brands (model) adaptation liquid power Like the new energy vehicle of the battery thermal management system, consist of a separate water-cooled plate control module, a PTC control module, an electronic water pump, a valve body, and a related attachment line.
When providing a low-temperature preheating servo for a power cell, heat the coolant within the circulating line through the PTC control module, and the internal portion of the battery is entered into the battery through the electronic water pump “pump”. The pipe is used for the module temperature rise; when providing a high-temperature heat dissipation servo for the power battery, the “cold amount” from the electric air conditioner is lowered by the water-cooled plate module to cool down by the electrical pump “pumped” battery inside the battery. Used for the dielectric heat.
Whether it is high temperature heat dissipation, or low temperature preheating, the preset operating temperature has been reached by cooling or warming of the battery system after “cold heat” for the coolant. During the “cold amount” and “heat” exchange, it is necessary to work with the energy from the power battery or the engine. In addition, once the inside of the power battery is damaged, the coolant is leaked, and a combustion accident will also be triggered.
It is to be noted that after BYD’s self-developing and mass production DM-I super mixed special power blade battery starts the direct cooling control function, the active high temperature heat dissipation efficiency is more balanced, and all the battery is faster. And better consistency, complete setThe structural structure of the system is greatly simplified, and reliability and security are more preferable.
3, DM-I super mixed special power blade battery unique thermal management control technology (strategy) Advantage:
The picture above shows BYD Qin PLUS (equipped with 直 直 四 四 缸 缸 缸 缸 混 混 混 专 状态 状态 状态 特 特 特 特 特 特 特 状态 状态 特 特 特.
Red Arrow: IPB Brake System Replenishment Liquid
Green Arrow: EHS Mix System Dual Motor Electronic Control System
White Arrow: EHS Clearing System Dual Motor Drive System
Blue Arrow: 电 1. 1.5 Mixed Special Engine, Drive Motor and Generator Shared High Temperature Heating Circulation Tube Rifting Liquid
Yellow Arrow: EHS Clearing System Dual electrical control system high temperature heat dissipation circulation pipe rolling pot
The picture above is Tang PLUS (equipped with 直 直 四 四 缸 1.5T mixed special engine) front power tank Sub-system detail status close-up.
Red Arrow: 电 骁 1. 技术 技术 技术 专 专 体 体 体::::::::::::::::::::::::::::: Arrow: 电 云 1. 1.5T Mixed Special Engine, Drive Motor and Generator Sharing High Temperature Heating Circulation Tube Rifting Liquid
Yellow Arrow: EHS Clearing System Dual Electronic Control System High Temperature Circulation Pipeline replenishment kettle
Oblim 1.5 engine and 云 1.5T engine adapt to different thermal efficiency technology can be associated with the EHS mixing system, and in series with its dual motor part in a high-temperature heat dissipation cycle line . Since the cooling demand temperature of the EHS dual motor electric control system is significantly lower than the dual motor drive system, a high-temperature heat dissipation cycle line is set separately.
Because the DM-I super mixed special power type blade, a new self-heating low temperature preheating technology and direct cooling high temperature heat dissipation techniques were used, so the “DM2.0” and “DM3.0” were canceled. Platform Many models (Qin PRO DM, Song PRO DM, Tang DM, Chinese DM) Configuration Power Battery Liquid Heat Management Circulation Pipe.
It should be noted that the power compartment structure of the DM-I platform model (Qin Plus, Song Plus and Tang Plus) is “abnormal” simple, remove the PTC control module for battery system, water-cooled board Control module, at least 1 set of electronic water pumps, 1 set of “X-through” valve body and plurality of circulation lines and no less than 4 liters of coolant, so that the self-weight reduction and reliability of the whole vehicle have different degrees. 
The author has something to say: “History is always amazing, but repeats in different heights”
BYD Qin Listed, configure 1 Set of 6DCT-based drive motors (motor electric control alone) and lithium iron phosphate batteries (passive air-cooled heat dissipation). Subsequently, Qin was involved in the 2014 Chinese Automobile Rally Championship (SAE group).
2017 BYD Qin 100 is listed, configure 1 set of 6DCT-based drive motor (motor electric control separate settings) and three-dimensional lithium battery (liquid cooling active high temperature heat dissipation) . After the Qin quantified car status, the 2017 China Auto Rally Championship (SAE group).
2019 BYD Qin Pro DM listing, configure 1 set of 6DCT-based drive motor (motor electric control “2” setting), BSG motor (electronically controlled separate Setting) and a three-dimensional lithium battery (set 1 set of liquid cold active high temperature heat dissipation system). Subsequently, Qin was involved in the 2010 China Auto Rally Championship (SAE group). 
In 2020, BYD Han DM Dual Engine Four-Top Edition is listed, and the configured BSG motor is set separately, and the two motor control systems are carried out. 2 in 1 “integrated, three-dimensional lithium battery system has a complete liquid high temperature heat dissipation and low temperature preheating circulatory system.
BYD DM model drive technology continuous evolution, electric drive system from mechanical DCT system conversion to electrically conductive EHS system; power generationThe machine is connected to 90 kW.
BYD DM model battery and thermal management control technology continued to evolve, experienced lithium iron phosphate batteries – three-dimensional lithium battery – blade battery three development phases; heat management control technology from passive air cooling, active liquid cooling , Active liquid cooling + PTC low temperature preheating, and then direct cooling heat + pulse self-heating conversion.
DM-I platform engine, EHS electric mixing system and special blade battery and thermal management control technology, relative to the DM model of DM models in the past, the structure is optimized, and the reliability is obtained. Strengthen.
Most importantly, Qin PLUS based on the DM-I platform exceeds the same price of fuel vehicles in the manufacturing cost level, rolling all competitive production PHEV models at the comprehensive performance level.
Not complete. . .
New Energy Intelligence Analysis Network Evaluation Group