Deep: Develop a state of BYD “E ++ Platform” based on flat thread drive system

On December 25, 2020, BYD was produced by the customized electric network of the customized electric network manufactured by the production base of Changsha. This electric network named D1 is configured to facilitate the side slide door (one side of the passenger), a larger rear space space, and optimization of the call software vehicle. As of press time, the relational and technical state of the D1 electric network approximately, is only a configured, passenger, passenger comfort, and the lattice USB interface, which is officially released by a travel platform.

However, for the sole manufacturer of the electric network, D1 is second only to Han EV, 2021 Tang EV and Song Plus 4th. Master production electric vehicle with blade battery system. According to the new energy intelligence analysis network, the relevant information acquired by different channels over the past 1 year has passed the “E ++ Platform” platform solution for BYD throughout the latest channels.

Through the electric drive technology of the D1 electric web, the charge system integration or even the detail of the thermal management of the blade battery can be used to confirm that BYD is next or the many EV models are pushed. ” E ++ platform “technical state.

The “E ++ Platform” technical system will be based on the “E + platform” application of the mass production of Han EV electric vehicle, using more advanced flat line winding technology “3-in-1” electric drive system; based on low Blade battery system for conductivity special coolant; volume and self-weighing further reduced new state “2 in 1” bidirectional charge power system configuration.

Note 1: The latest technical analysis of BYD involved in the full text, the official release of BYD is prevail

Remarks 2: D1 electric web network only applies a new state in the “E ++ platform” system ” 2 in 1 “bidirectional charge and discharge system assembly,” Multi – 1 “low voltage power system assembly. Whether it is equipped with a “3-fitting 1” electrical drive assembly using flat line winding technology cannot be finalized.

Remarks 3: The definition of the “E ++” platform is the “E platform” and the “E platform” and Han EV models of the new energy intelligence analysis network according to the new energy intelligence analysis.The continuation of the “E + Platform” is used.

1, BYD manufactured D1 electric network approximately:

Due to some factors, the D1 electric network can not be released, and the status of the DIT status is close-up, but can be used in Han EV. The technical state is detailed.

The figure above shows the state of the technical state of each division system in the Han EV four-wheel drive (dust cover has been removed).

Blue Arrow: “2 in the E + Platform” system with boost function “2 in 1” two-way charge and discharge system assembly

Red arrow: 2 groups “3 in 1” electricity Drive assembly + “2 in 1” bidirectional charge and discharge system assembly shared high-temperature heat dissipation pipeline replenishment kettle (filling is ordinary coolant)

Yellow arrow: power battery thermal management circulation pipe (Filled is a low-conductivity special coolant)

Green arrow: in series in the blade battery thermal management circulation line PTC control module

Han EV is “E + platform “, Since the” 2-in-1 “bidirectional charge and discharge system assembly is configured,” E Platform “used above the technical level than the Tang EV. Tang EV and Qin Pro EV, etc. 2019 annual production models, “E platform”, “3 in 1” high-voltage electricity system assembly (integrated DCDC, PDU and OBC), “3 in 1” electric drive assembly And “10 in 1” low voltage power system assembly.

“2-in 1” two-way charge and discharge system assembly in the “E + platform” system is to integrate PTU and OBC while retaining DCDC, and 560 volts. The blade battery of the platform is supported at 120 kW, the charging current continues to decrease, and the heat generation is continuously reduced, which is conducive to improving the safety of the vehicle.

The picture shows the system of the dynamic battery thermal management system of the Han EV power cabin, which is used to replace the main division of the D1 electric network.

In fact, in the front power compartment of the D1 electric network, the front power cabin is arranged with almost the same blade battery heat management control structure with Han EV. Among themThe water-cooled plate control module (with high temperature heat dissipation function is provided for the blade battery); the PTC control module (providing a low-temperature preheating function for the blade battery); the low conductivity coolant is filled (with Blue dedicated coolant like Han EV).

The first appearance in the New Exhibition Hall in BY-Di Ping Mountain Base, Shenzhen, which integrates DCDC and OBC (including PDU) two-way charge and discharge. The system assembly is different from the “2-in 1” two-way charge and discharge system equipped with the Han EV on the technical details. The D1 is equipped with a smaller, the structure is more compact “2-in-one” two-way charging power system, which is the core component of BYD’s latest “E ++ platform”!

Remarks 4: For the demand for webmarks, the power of the “3-in-1” electric drive system that D1 electric web network will be “limited” in a reasonable state. The flat line winding technology for application performance is based on the actual data released.

Remarks 5: This group of “2-in-one” two-way charging power system assembly, BYD officially defined as “3 in 1” high-voltage electricity system assembly, defined from technology to fourth Generate the integrated power.

2, BYD’s latest “E ++ platform” technical status:

This is used to integrate front electric drive assemblies, high voltage electrical control systems, The “E ++ Platform” architecture of the DLINK system, low voltage electrical system, blade battery and rear electrical drive system, undoubtedly represents the highest technical level of BYD’s new energy core technology in December 2020.

Blue Arrow: 2-in-one 1 “bidirectional charge and discharge system assembly has been used in D1 electric networks

Yellow arrow: 150 kW of the flat line winding technology Head 1 “front electric drive assembly

Black arrow: support more expandable DLINK system (middle large screen)

Green arrow:” Multi 1 “with IBCM Technology Treatment system

White arrow: blade battery system

NoneOn the volume or self-weight, the “2-in-one” two-way charge-making system assembly of this set of new states is largely advantageous for the layout of the front power cabin of the model platform. A more compact structure, the appearance is to reduce the shaft of the front sub-frame, which is conducive to the “extension” of the endless mileage. During the loading and verification process, the “2-in-one” two-way charging power system in the new state can still meet the technical setting based on high voltage platform blade battery size charge and discharge. The structural needs of the auxiliary heat dissipation system and the power consumption demand are consumed, or will be reduced again.

The front “3-fit 1” electric drive system assembly in the demonstration gaeler is not included in any text. The maximum output power of the Han EV four-wheel drive is 200 kilowatts, integrated SiC electronic control technology, the “3-in-1” electric drive system of the maximum 15500 rpm, and the new state “3-in-1” electric drive system The maximum speed start code will not be less than 15500 rpm, and the maximum output power will not be less than 100 kilowatts.

The above picture shows the “E ++ Platform” demo architecture close-up “3 in 1” electric drive assembly. BYD self

Song EV (parameter | picture) four-wheel-free version (unqualified) Electrical four-wheel drive control strategy.

BYD’s engineers have configured the first 163 kilowatts for the Han EV, and then the third electric four-wheel drive control strategy of “front and light weight” after the “front”. Even in Sport mode, the policy of the front-rear drive motor torque redistribution of the Han EV four-wheel drive is “the full-time four-wheel drive” mode.

This prefers that two-drive and four-wheel drive models will still be launched in the “E ++ Platform” subdivision architecture of the overall energy consumption. Just, I hope that BYD Sales Company can consider the price of 200,000 yuan based on driving safety under the price of 300,000 yuan, and configure the model of electric four-wheel drive system.

Of course, BYD’s engineers will certainly not stop in the new platform’s electric four-drive control strategy. Then, the maximum output power is 150 kW, and the “3-in-1” electric drive system with flat line winding technology is veryNaturally become an important part of the “2-in-1” two-way charging power system in the new state.

The electric drive system embarked by the electric vehicle in BYD, and the electric drive system, which is equipped with a relatively common round winding technology. In order to improve performance, BYD over 6 years, by lifting electronically controlled system integration, motor speed from 12,000 rpm, 15000 rpm, to 15500 rpm, to achieve higher driving efficiency.

This 150 kW, “3-in-1” electrical drive assembly using flat line winding technology reduces system volume and self-weight, and the corresponding improvement of torque density (Higher speed density brought by higher speed), it can be very flexible “to” to the left “to develop electric drive assembly with low power consumption;” to right “developed electric drives with high performance traction Total.

Put the flat line winding technology, the amount of 150-200 kW-scale “3-in-1” electrical drive system with a radiopolis radiophalmic heat, and forms the fourth technical state electricity The drive system is not a problem with the scale of Reliability and mass production for BYD, and more is to see the market positioning and product setting tendency.

BYD sells the “Dynasty” electric vehicle and plug-in mixing vehicle, all of which are composed of low voltage electrical assemblies based on “10 in 1”. DLINK car system. On the “E ++ Platform”, BYD once again enhanced the integration of the low-voltage power system of the whole car, especially the speed of signal transmission and feedback of each division system. The “10-in-1” low-voltage electricity system assembly is evolved into a “polymer 1” processing system using IBCM technology.

In the “E ++ Platform” architecture in the new state, the blade battery is still important to determine the vehicle’s battery life, charging power, two / four-drive, model size, and market positioning. Sub-system. At present, the “technological combination” of blade battery and filling low-conductivity special coolant is only Han EV for private car market; D1 manufactured by BYD facing the web market.

Han EV uses “E + Platform”, D1The “E ++ platform” can be confirmed that the combination of blade batteries and low conductivity special coolant will be called “standard” of the mainstream EV model of BYD after 2021. More production, more production of the “E ++ platform” BYD electric car, will also be seen as a high technical specification, “Show” to Fudi power potential customers and enhance its purchase desire, including blade Battery and flat wire drive system for external sales.

The author has something to say:

BYD’s D1 electric network of the “Subden” of BYD is 4390x1850x1650mm, the shaft distance is 2800mm, and a new state is configured 2 Head 1 “two-way charge and discharge system assembly, a set of maximum output power 100 kW” 3 in 1 “electric drive system assembly, standardized blade battery and low conductivity dedicated coolant. Although it is not confirmed that the maximum output power 100 kW “3-in-1” electric drive assembly uses flat line winding technology, but the D1 electric webmark can be seen as the first model of BYD’s latest “E ++ platform”. .

The D1 electric webline of the 200 km-level D1 electric web is not sold for the private car market. If the “Qin” is hanging in the “Dynasty” car system in BYD “Yuan” logo, perhaps you can sell it for a private car market. In fact, the purpose of this article is only through the technical state of the D1 electric network, and the “E ++ platform” technology solutions including BYD will continue to be introduced by the Flat Wire Winding Electrical Drive System.

New Energy Intelligence Analysis Network Evaluation Group