no. 7 alkaline battery.Can BYD's hybrid technology rival Toyota's?

　　Some netizens asked: "Can BYD be on par with Toyota in terms of hybrid technology? The following answers come from new energy vehicle practitioners.

　　Toyota THS uses a planetary gear structure called PSD (PowerSplitDevice) as the core of the entire hybrid system. The structure is very exquisite and can realize the transmission function, so this system is also called eCVT, but in fact Toyota THS does not have a traditional gearbox. In this system, as long as the engine is running, it is generating electricity almost all the time. At medium and low speeds, the engine drives the No. 1 motor (auxiliary motor) to rotate forward to generate electricity, and the No. 2 motor (main motor) is driving; after exceeding the critical speed (82km/h), the No. 1 motor reverses and drives the vehicle forward together with the engine. , the No. 2 motor is converted into a generator. All this is energy distribution under the planetary gear structure, and there is almost no waste of engine energy. This hybrid mode is generally called a hybrid structure and is a strong hybrid.

　　BYD's technical routes are divided into two types, one is the DMI system represented by F3DM, and the other is the DMII system represented by BYD Qin. The DMI system has a dual-motor structure, with one main and one auxiliary motor, a 25kw generator M1, a 50kw electric motor M2, and a 1.0L 3-cylinder 50kw engine. The engine is only used to generate electricity for the M1 and does not participate in driving the axles. The first task of M1 is to start the engine and then act as a generator to charge the battery; M2 is the main electric motor and recovers energy to charge the battery during braking. DMI is essentially a series structure. The engine drives the generator to generate electricity, the generator charges the battery, and the electric motor drives the vehicle. This is a relatively simple hybrid mode, but that does not mean that BYD's DMI does not have a bit of technical content. BYD has added a parallel mode to the series structure, allowing the engine to drive the M1 and M2 electric motors to provide higher output power. The biggest change of the DMII system compared to DMI is the adoption of a plug-in + single motor solution, which uses a 110kw/250Nm motor paired with a 113kw/240Nm 1.5T turbocharged engine. Theoretically, the single-motor solution cannot effectively isolate the bad working conditions of the engine, but DMII adopts a plug-in design, which makes up for the shortcomings of the single-motor solution to a certain extent. Because the plug-in solution has a larger battery capacity, the need for the internal combustion engine to generate electricity while driving is greatly reduced. At least it can basically cope with short-distance driving in urban areas.

　　Both technical routes have their own advantages and disadvantages.

　　The advantages of Toyota THS: First, it does not have high requirements on motor power and battery capacity, which can effectively reduce the cost of the entire vehicle. For example, the motor power of Pruis is 60kw, while BYD Qin's is 110kw, Honda's Accord Hybrid is 124kw, and GM's Volt is 111kw. The difference in battery capacity is even greater. Pruis seems to have 2.3kwh, BYD Qin has 13kwh, Accord Hybrid has 6.7kwh, and GM Volt has 16kwh. In particular, Toyota THS currently mostly uses nickel-metal hydride batteries, while other technical routes generally use lithium batteries due to high battery performance requirements, so the cost advantage of Toyota THS is even more obvious. Second, the energy utilization efficiency of Toyota THS is very high, with almost no waste.

　　The advantage of BYD DMII is that it adopts a plug-in design, which saves fuel more when driving short distances in urban areas, but its overall fuel consumption is not as good as Toyota THS.

　　Both of these technical routes are currently excellent hybrid solutions. I won’t talk about Toyota THS. There are many models that adopt similar technical routes as BYD DMII, such as Audi A3e-tron, Volkswagen Golf GTE, and BMW i8. It can be seen that this technical route is also a very popular hybrid solution at present. Of course, this is also a solution that other manufacturers have to find new ways to circumvent Toyota's patent barriers.

　　At present, both technical solutions have good market prospects, and it is not yet clear which one is better and which one is worse. BYD Qin can meet the needs of some users in terms of performance and fuel efficiency, and it should have relatively good market prospects at a reasonable price.

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