FinDreams Powertrain Co., Ltd.

FinDreams Powertrain (a wholly-owned subsidiary of BYD) developed the world's first mass-produced 8-in-1 electric drive powertrain, deeply integrating eight components: drive motor, motor controller, reducer, on-board OBC, DC/DC, distribution box, vehicle VCU and BMS. Overall efficiency reaches 89%; deep integration reduces volume by 16%, weight by 10% and increases power density by 20%. Model parameters (source: FinDreams Powertrain official WeChat, compiled from Haitong International/Shengang Securities research): 70kW version — assembly dimensions 407x386x392mm, operating voltage 180-459.9V, peak power 70kW@14000rpm, peak torque 180N·m@0-4090rpm, rated power 35kW@4775-14000rpm, rated torque 70N·m, max speed 14000rpm, protection rating IP67B; 150kW version — dimensions 451x455x450mm, voltage 208-478.3V, peak 150kW@15000rpm, torque 300N·m, rated 65kW@4433-15000rpm, torque 140N·m, max speed 15000rpm, IP67B; 230kW version peak 230kW@16000rpm, torque 360N·m (for B~C-class vehicles). Uses high-efficiency flat-wire motor (97.5%), self-developed high-performance SiC controller (loss reduced 70%), parallel-axis reducer (max efficiency 97.8%), OBC max efficiency >95%; supports 800V high-voltage platform fast charging (5min charge for 150km range), can be arranged in FWD/RWD/AWD architectures.

8-in-1 integration; overall efficiency 89%; volume -16%; weight -10%; power density +20%; peak power 70-270kW; supports 800V fast charging

FinDreams Powertrain is among China's earliest suppliers to mass-produce 3-in-1 electric drive systems. The all-new (second-generation) 150kW 3-in-1 drive covers 120-180kW, with two gear ratios and maximum wheel-end torque of 3000-3800N·m, simultaneously suiting A+/B sedans and compact/mid-size SUVs. It uses a Permanent Magnet Synchronous Motor (optimized magnetic circuit, ultra-thin high-performance silicon steel), motor efficiency 97.3%, assembly NEDC efficiency 89%, area with assembly efficiency >80% exceeds 90%; controller peak efficiency 98% (fewer switching events reduce IGBT losses); shaft-type reducer with optimized lubrication, peak efficiency 97.8%; torque control accuracy 1N·m (<50N·m) or 2% (>50N·m); full-load NVH <80dB; low Z-height, suitable for both FWD and RWD. Cumulative installations exceeded 700,000 sets by Dec 2021. FinDreams is also China's first to mass-produce SiC 3-in-1 powertrain products (first used in BYD Han EV, 0-100km/h in 3.9s) and is developing 800V SiC systems.

3-in-1 integration; power 120-180kW; motor efficiency 97.3%; assembly NEDC efficiency 89%; controller peak efficiency 98%; reducer peak efficiency 97.8%; 700,000+ units installed

FinDreams Powertrain's highly integrated flat-wire (hair-pin) Permanent Magnet Synchronous Motor achieves motor efficiency up to 97.5%, with a platform spanning 70-270kW. Key evolution: e-Platform 3.0 adopted a high-efficiency flat-wire motor (slot fill rate up 20%-30%, efficiency 97.5%); e-Platform 3.0 Evo (May 2024) launched the world's highest mass-production speed motor at 23000rpm; Super e-Platform 3.0 (March 2025) mass-produces a 30511rpm motor with single-module peak 580kW, peak torque 750N·m, power density 16.4kW/kg (No.1 in production), 30% smaller volume and 25% lighter at equal power. Mass-produced models: TZ200XYAT (variable-flux home-use, rated 120kW/peak 240kW/peak torque 380N·m/max speed 30000rpm, 8-in-1 flat-wire oil-cooled, rare-earth use halved, with full SiC controller); TZ226Q0YD (30511rpm high-performance, peak 580kW/torque 750N·m/power density 16.4kW/kg, for flagship Han L/Tang L/Denza/Fang Cheng Bao/Yangwang). BYD's drive motor installations have ranked No.1 worldwide for years.

Flat-wire PMSM; motor efficiency 97.5%; platform power 70-270kW; mass-prod speed 23000rpm; mass-prod speed 30511rpm; peak 580kW; torque 750N·m; power density 16.4kW/kg; volume -30%; weight -25%

FinDreams Powertrain's drive system R&D has reached its fourth generation and it is China's first to mass-produce SiC 3-in-1 powertrain products, using BYD Semiconductor's in-house SiC power modules (front copper-clip interconnect reduces parasitic inductance and boosts overcurrent capability), with single-module output up to 200kW and doubled power density. Per FinDreams' controller R&D and manufacturing center: SiC raises mid-low load efficiency and extends vehicle range by 5%-10%; controller power density rises from 18kW/L to 45kW/L (enabling miniaturization); in the 85%-share high-efficiency zone efficiency improves 6%, and in the mid-low load zone 10%. Planned SiC controller upgrades across 2020-2025 in three generations: applicable voltage platform to 800V, power density to 90kW/L, peak efficiency up to 99.7%, speed up to 20000rpm. Yi Sifang comes standard with 800V high-voltage SiC controller, peak efficiency 99.5%.

SiC power module; single-module output 200kW; power density 45kW/L; high-eff zone +6%; mid-low load +10%; range +5%-10%; peak efficiency 99.7%; speed 20000rpm; Yi Sifang 800V SiC controller 99.5%

FinDreams Powertrain's drive reducer uses a parallel-axis (shaft-type) design with peak transmission efficiency of 97.8%. Low-friction bearings and oil seals, optimized gear lubrication paths and structure, and low-viscosity oil reduce churning losses, improving transmission efficiency and NVH. It serves as a core integrated component in the 3-in-1 150kW assembly and the 8-in-1 powertrain, sharing the housing with the motor and controller; in the 12-in-1 intelligent e-drive it uses an oil-guiding structure and low-viscosity oil with peak transmission efficiency 97.6%.

Parallel-axis design; peak transmission efficiency 97.8%; 12-in-1 transmission peak 97.6%; low-friction bearings and seals; low-viscosity oil cuts churning loss

FinDreams Powertrain pioneered the industry's first high-safety, highly integrated power domain controller combining motor control, battery control, vehicle control and charging control, the core domain-control innovation of the 8-in-1 powertrain. BYD's e-Platform 3.0, based on the motor's fast response, developed the industry's first drive train domain controller, applied in models like EA1; it uses novel isolated communication, multi-layer network encryption and real-time cell monitoring/early-warning technologies, with an architecture meeting ISO 26262 and ISO 21448, enabling computing, power and energy distribution plus intelligent vehicle functions. The Yi Sifang platform also adopts a highly coordinated E/E architecture of 'central computing platform + domain control'.

Four-control integration (motor/battery/vehicle/charge); meets ISO 26262 & ISO 21448; novel isolated comms; multi-layer network encryption; real-time cell monitoring & warning

BYD's Yangwang brand launched on Jan 5, 2023 the four-motor independent-drive powertrain ('Yi Sifang' from e to the fourth power). Its four in-wheel motors deliver per-motor peak power 220-240kW, peak torque 320-420N·m and max speed 20500rpm; the vehicle exceeds 1100PS, peak torque 1680N·m and 0-100km/h in about 3s. The whole lineup comes standard with 800V high-voltage SiC controller (peak efficiency 99.5%, power density up 100%, current output up 50%). It has quadruple backup safety redundancy: a single tire blowout is identified and power reallocated within 0.1s, stable stop still possible at 120km/h, core systems IP68 protection, emergency wading escape capability; via independent four-wheel torque vectoring it achieves a 4.85m min turning radius, pivot turn, crab walk and tank turn, and with DiSus-P enables 3-axis 6-DOF body control. Yangwang U9 Xtreme further upgrades: mass-produced 1200V ultra-high-voltage platform, four custom 30000rpm motors, system peak power 2220kW, measured top speed 496.22km/h, Nürburgring Nordschleife lap 6:59.157.

Four-motor independent drive; per-motor peak 220-240kW; peak torque 320-420N·m; max speed 20500rpm; vehicle 1100PS; peak torque 1680N·m; 0-100km/h ~3s; 800V SiC controller 99.5%; min turning radius 4.85m; U9 Xtreme 2220kW/top speed 496.22km/h

Debuted globally with BYD e-Platform 3.0 Evo on May 10, 2024, the 12-in-1 intelligent e-drive technology cluster integrates twelve items: 23000rpm motor, high-efficiency reducer, SiC controller, vehicle controller (VCU), battery manager (BMC), DC-DC converter, on-board charger (OBC), power distribution module (PDU), intelligent boost module, intelligent current-boost module, intelligent self-heating module and energy-management smart system. Using stacked laser-welded SiC power modules drastically cuts stray inductance; controller peak efficiency 99.86%, CLTC overall efficiency 92%, city low-speed efficiency up 7%, range up over 50km; the 23000rpm motor was then the world's highest mass-production speed motor, top speed over 225km/h. First model: Sea Lion 07 EV.

12-in-1 integration; 23000rpm motor; controller peak efficiency 99.86%; CLTC overall efficiency 92%; low-speed efficiency +7%; range +50km; top speed 225km/h

BYD's BEV vehicle platform (FinDreams Powertrain supplies its core assemblies: motor, controller, reducer, power supply, domain control). World's first mass-produced 8-in-1 powertrain (overall efficiency 89%), 800V high-voltage architecture, CTB battery-to-body integration, intelligent domain-control E/E architecture; supports FWD/RWD/AWD, covering A0 to C/D-class models. It spawned e-Platform 3.0 Evo (12-in-1, 23000rpm motor) and Super e-Platform 3.0 (30511rpm, 580kW, 1000V+ kilovolt architecture). Drive-system operating efficiency exceeds 89%, 0-100km/h as fast as 2.9s and range up to 1000km (on Blade Battery).

800V high-voltage architecture; world's first 8-in-1 (overall efficiency 89%); CTB battery-body integration; operating efficiency >89%; 0-100km/h 2.9s; range 1000km; covers A0-C/D classes