Global first: Develop the DTCS Control Strategy of BYD Han EV Four

In 2015, the first generation of Tang DM was listed in March, and Tang DM models in BYD’s first generation of electric four-wheel drive system were in the final market. Technical state calibration, in the video of BYD officially disputed a very large fragment of the controversy, that is, Tang DM and BMW X6 on the ice tuning test, test the two cars on a low adhesive ice The degree of traction control, everyone knows that Tang DM is easy to win, benefit from the torque control capabilities of the 20 millisecond level of BYD’s four-wheel drive system, and ensure that motor power is transmitted to the wheels to reduce the slip of the vehicle and ensure the continuation of the power. Output, but in the new energy car environment at the time, it was considered to be BYD to deliberately changed the unfair test of the BMW of the snow and the highway, did not attract consumers.

In 2021, the BYD Han models with the third-generation electric four-wheel drive system of BYD have achieved a total sales volume of more than 50,000 excellent results, with safety, performance, Deluxe three big benchmarks, BYD Harm has become the only Chinese car brand in the history of China and Large C-Class Car Market. BYD’s electric four-drive technology has been continuously upgraded and developed in recent years.

Recently, on the basis of the original BYD’s third-generation electric four-drive, the Han EV model has been upgraded again, and the DTCS developed by BYD and Bosch is equipped in Han. EV four-wheel drive version realizes the world’s initiative. Compared with the previous traditional TCS traction control system, the torque control time of the Han EV quad-driven version of DTCs accelerated by 20 times, and the torque response closed loop accelerated by 10 times. Maximum reduction of wheel sliding amount, once again improved Han EV Safety, efficiency, handling and comfort of the four-wheel drive.

DTCs (Distributed TCS) is a driving force control system created for new energy vehicles. Traditional TCS will be controlled in ESPREG; body electronic stability system or IPB integration In the brake system, the torque control is performed by signal interaction with the power system, and the DTCs move the traction control system to the motor controller.A faster motor torque response, at which time the motor controller is directly determined, the tire slip is controlled.

DTCS will make the tire start at the low attachment road, can always ensure sufficient tire grip, enhance the acceleration performance of the vehicle under low access, therefore DTCS’s Han EV four-wheel drive version will be shortened at low wall. The test results show that the Han EV four-wheel drive version is accelerated on the ice. The acceleration time accelerates 2s, and the three-footed 0-60km / h acceleration time accelerates about 0.8 s, which is faster and more stable. By the low wall, the safety of the vehicle is guaranteed. Therefore, DTCs make it basically not slipped into “instinct” of BYD Han EV.

As early as December 2015, the information obtained by the new energy intelligence analysis network integrated multi-channel channels launched a pre-proposed manuscript of a number of driving technologies including Han EV. Among them, the front and rear driving bridge torque allocation of the DM is more equal, and the technical point of Han EV electric drive technology has been verified in the 5-year production vehicle. Han EV can achieve such excellent four-drive performance improvement through the DTCs traction control system, and must be inseparable from Han EV’s strong third-generation super electric four-drive technology.

Using a 560-volt voltage platform blade battery (adaptable low-conductivity coolant) with a DC fast charge, a smaller current (less The heat generation and energy consumption), the higher integration “E +” electric drive technology platform (200 kilowatt 15500 rpm / minute “3 in 1” electric drive assembly + SiC control technology), the third technical state electricity Four-wheel drive technology solutions, indicating that BYD Han EV four-wheel drive is a system of system integrated into the blade battery, and is integrated with electricity four-drive performance for the safety of the development model platform security and axial torque. Guided electric car.

According to the new energy intelligence analysis network in July, the clutch four-wheel drive control strategy evaluation of Han EV Quad-driven version (unmapled DTCS version) is seen. The ECO model is similar to “time four-wheel drive”; SPORT mode is similar to “full-time four-wheel drive”.

The picture above shows the Han EV quad-driven version (unmapled DTCS version) Open the SPORT mode on the snow and snow road to perform “all throttle” acceleration test, starting instant. In an accelerated instant, the front and rear drive bridges simultaneously burst torque, although the rear electrical drive assembly is more “power” than the front electric drive assembly, but the body posture does not swing due to the setting of “front and light”. As the release of the drive bridge torque, the control system gradually adjusts the shaft torque, and the vehicle is smoothly accelerated.

In the gantry on the giant Han EV four-driven version (not equipped with DTCS version), the electric four-wheel drive control strategy test can indeed be visually reflected by the motor operation. status. However, in the actual performance of the ice and snow pavement in the low temperature environment, it can not only see the torque assignment efficiency of the Han EV Quad-driven version (not equipped with the DTCS version), but also to see the Safety of the BYD Automotive Engineering Strict control.

Today, the Han EV is the first model of DTCs, depending on the electric four-drive technology of BYD, the speed of the motor response DTCS torque request is about 10 times, and the tire is reduced. Sliding volume, realizing multi-dimensional security promotion in terms of vehicle performance, bringing users a more secure driving experience.

The author has something:

Since the past, BYD has attached great importance to the development of new energy automobile technology and invested a lot of talents and resources, and has accumulated a large number of new energy core technologies. Today, BYD has a world leading battery, motor, electric control, and vehicle core technology, and realizes multiple spans in power performance, safety protection and energy consumption. And the same is that the small-scale C-level Class Class Class Class Class P7 is difficult, even if it is equipped with a DTCS system, it is difficult to achieve such a large number of four-drive performance. Although Xiaopeng P7’s electric four-wheel drive system is also a backweighted torque control strategy, but Xiaopeng P7’s vehicle voltage platform and driver motor control strategy have no BYD Han EV leads.

BYD Han EV uses a 560-volt voltage platform blade battery (suitable for low-conductivity coolant), a higher integration “E +” electric drive technology platform (200 kW behind 15500Rub / score “3” 3-in-one “electric drive assembly + SiC control technology) of the third technical state electric four-wheel drive technology solution, the highlight advantage of the vehicle technology platform, let BYD and Bosch have developed DTCs Techniques can give full play to its maximum utility, BYD third-generation electric four-drive technology and depth fusion upgrade of DTCS traction control system will exert 1 + 1> 2 overall effects.

“E + Platform” + 3rd Generation Four-wheel Drive Technology +560 Volvoltaic Skirt Battery System + DTCS Control Strategy, Received the Comprehensive Performance of the Four-Tropical Top Edition of the BYD Han EV, and is based on the DM-X platform A large-scale four-wheel drive SUV provides data support.

New Energy Intelligence Analysis Network Evaluation Group Origin