FinDreams Technology

FinDreams Technology (a wholly-owned subsidiary of BYD) new-generation direct-cooling/direct-heating integrated heat pump HVAC system uses a single refrigerant circuit to simultaneously cover four functions—cabin AC cooling, heat pump heating, battery direct cooling, and battery direct heating—eliminating the pipelines and components of an independent battery thermal management loop and saving approximately 15%–20% of vehicle packaging space (source: NEV thermal management technical analysis article). The system supports 11 operating modes: AC cooling, battery direct cooling, cooling dual-mode (AC cooling + battery cooling), heat pump heating, battery direct heating, heating dual-mode (heat pump heating + battery heating), cooling/heating dehumidification, cooling/heating dehumidification + battery cooling, cooling/heating dehumidification + battery heating, AC cooling + battery heating, and heat pump heating + battery cooling (source: FinDreams Technology vehicle thermal management technical data). Operating temperature range -25°C to 48°C under all conditions; saves over 42% energy compared with PTC heating, about 30% in the 0 to -5°C range, and extends range by 22–66 km relative to PTC (source: FinDreams thermal management technical data / Yiche account 'FinDreams Technology deepens automotive thermal management'). Technology evolution: indirect heat pump → direct heat pump → vapor-injection low-temperature heat pump → 2021 direct-cooling/direct-heating integrated system (combining vapor-injection heat pump + battery direct cooling/heating, supporting 11 modes). In 2021, the world's first 'direct-cooling/direct-heating' heat pump system rolled off the line on a model, breaking through -25°C vapor-injection low-temperature road testing; in 2025 BYD made the wide-temperature-range heat pump assembly standard across the full lineup (stable cabin heating lower limit -25°C, temperature range -40°C to 60°C). Refrigerant is mainly R134a, with R744 (CO2) and HFO blended refrigerant alternatives under development (source: 2023 CCRC Thermal Management Annual Conference, Chen Xuefeng's speech; regulations require refrigerant switch by 2029). Cooling/heating capacity is matched to each vehicle; no single publicly rated value.

Single refrigerant circuit covering four functions (AC cooling / heat pump heating / battery direct cooling / battery direct heating); saves approx. 15%–20% of vehicle packaging space; supports 11 operating modes; operating temperature -25°C to 48°C full-range; over 42% energy saving vs PTC heating, approx. 30% in 0 to -5°C range; extends range 22–66 km vs PTC; 2025 wide-temperature heat pump assembly covering -40°C to 60°C; refrigerant mainly R134a, R744(CO2) and HFO blended alternatives in development

Core thermal management actuator of FinDreams Technology, adopting a scroll-type high-voltage electric compressor structure, compatible with 800V high-voltage platforms (source: China Auto Supplier Network / enterprise research data). Voltage platforms: BC series 320–470V (externally supplied 350–470V range), ACD series maximum withstand voltage 1200V (rated approx. 900V, adapted to the Denza D9 EV full-range 600V platform solution), maximum rated voltage up to 720V, expandable 20CC–42CC (source: FinDreams vehicle thermal management technical data / NEV intelligence analysis network). Displacement/series: 28-34-38-42-46CC platform series; 45CC heat pump compressor (45CC Heat Pump Compressor); BC45 displacement 45cc, same platform expandable to 57cc, minimum operating speed reduced from 960rpm to 100rpm (Hall sensor), oil-gas separation efficiency 30%, residual oil growth 120%, first mounted on the Denza Z9 (source: IMI China / ChinaIOL). Operating temperature range: supporting self-developed components withstand -40°C to 150°C (source: enterprise research 2025). Communication: compatible with CAN/LIN (source: vehicle thermal management technical data). Features: simple structure, light weight and compact size, stable quality, low noise and high efficiency; liquid-cooled integrated compressor heat dissipation +50% adapted to heat pump. Milestones: 5 millionth unit (2023) → 10 millionth unit (end of 2024) rolled off line, roughly doubled in 17 months; annual capacity 3.6 million units+ (Xi'an line under construction); 2024 electric compressor installation share 31.9% ranking first in the industry (source: Gasgoo / enterprise research). Refrigerant matched to each vehicle (mainly R134a).

Scroll-type high-voltage electric compressor structure; compatible with 800V high-voltage platform; BC series 320–470V (external 350–470V), ACD series max withstand 1200V (rated approx. 900V); 28-34-38-42-46CC platform displacement series; 45CC heat pump compressor displacement 45cc expandable to 57cc, min speed 100rpm; supporting components rated -40°C to 150°C; compatible with CAN/LIN; 10 millionth unit end of 2024, 31.9% installation share industry first

FinDreams Technology PTC heater platform is complete, with independent intellectual property rights, covering a full range of voltage and power platforms, backed by years of R&D and mass-production experience (source: FinDreams vehicle thermal management technical data). Specific models: 6KW PTC water heater, 7KW PTC water heater, 8KW water PTC (Water PTC 8KW), split-type PTC air heater, air-heating PTC (source: vehicle thermal management technical data / 2023 CCRC Thermal Management Annual Conference exhibits). Protection rating IP68 (≥24h) (source: 2023 conference 8KW water PTC). Maximum operating voltage up to 730V (source: vehicle thermal management technical data). Advantages of the 8KW water PTC product: small weight, high power, smaller vehicle space requirement; removed breather design improves waterproof performance; driver and core upper cover use metal material to improve heat dissipation; optimized mounting points to embedded nuts in the water tank to improve strength; left-right structure allows IGBT heat dissipation via the core conducting heat to the coolant or via the housing fins, with full-condition IGBT no-overtemperature protection; only the water chamber part is sealed with a sealing ring, and the electronic control part is sealed with silicone coating (source: 2023 conference). The schematic marks water heater heating power 0–7KW and battery cooling 1–5KW (source: vehicle thermal management technical data). In the 'compressor-PTC 2-in-1' it is integrated with the PTC controller (source: 2023 conference).

Models 6KW/7KW PTC water heater, 8KW water PTC (Water PTC 8KW), split-type PTC air heater; protection rating IP68 (≥24h); maximum operating voltage up to 730V; water heater heating power 0–7KW, battery cooling 1–5KW; removed breather design improves waterproofing, metal material enhances heat dissipation, full-condition IGBT no-overtemperature protection

FinDreams Technology highly modularizes solenoid valves, electronic expansion valves, etc. through new assembly methods and processes, connecting externally to the compressor, indoor condenser and other components via pipelines directly or indirectly, and cooperating with the entire heat pump HVAC system under different operating conditions to achieve 11 functional requirements such as AC cooling and AC cooling + battery cooling (source: FinDreams thermal management technical data / industry analysis report). First-generation module: the 2021 EA-platform thermal management integration module was launched on the E2 and SC, and later on the entire new energy vehicle lineup including the Dolphin (source: same). Second-generation module (2nd Gen Thermal Management Integration Module): structurally attractive, relatively light weight, easy to form/clean/weld/with less machining; in performance the flow channels do not form a crisscross and are smooth, easy to separate hot and cold zones, and lower flow resistance (source: 2023 CCRC Thermal Management Annual Conference FinDreams exhibitor presentation). Increased module integration reduces the number of parts, lowers cost, and improves system architecture competitiveness.

Highly modular integration of solenoid valves / electronic expansion valves; first-gen module (2021) EA platform on E2, SC and full Dolphin lineup; 2nd-gen module attractive structure, light weight, easy to form/clean/weld, lower flow resistance, easy hot/cold zoning; higher integration reduces parts count and cost

HVAC (Air Handling Unit) is listed in FinDreams Technology's vehicle thermal management product line, alongside PTC, compressor, AC piping, thermal management controller and cooling module (source: FinDreams vehicle thermal management product line data). It undertakes cabin air handling functions (cooling/heating/dehumidification/air distribution), and is the core assembly of the heat pump HVAC system and cabin thermal management. As a system integrator, FinDreams supplies HVAC assemblies with the vehicle platform (such as BYD e-platform 3.0); specific model naming and detailed specifications such as rated airflow / heat exchange capacity are not publicly disclosed and are customized per vehicle program (public sources only confirm the product line exists, with no independent SKU parameter table seen).

Cabin air-handling assembly (cooling/heating/dehumidification/air distribution); alongside PTC, compressor, AC piping, thermal management controller and cooling module; supplied with vehicle platforms such as BYD e-platform 3.0; rated airflow / heat exchange capacity customized per model, not publicly disclosed

Thermal management pipelines (air-conditioning pipelines) are included in FinDreams Technology's vehicle thermal management product line (Source: FinDreams Technology vehicle thermal management product line materials). They connect the refrigerant circuit and the coolant circuit, covering the piping layout between the compressor, condenser, evaporator, heat exchanger, electric water pump, and various valves. In direct-cooling/direct-heating systems, the application of integrated valves simplifies refrigerant pipeline layout complexity, reduces vehicle assembly difficulty, and shortens operation time by approximately 25% (Source: New Energy Vehicle Thermal Management Technical Analysis). Detailed parameters such as specific pipe material specifications, pressure ratings, and joint types are not publicly disclosed and are customized per vehicle platform.

Connects refrigerant and coolant circuits; integrated valve application shortens assembly time by ~25%; covers piping between compressor/condenser/evaporator/heat exchanger/electric pump/valves; pipe material, pressure rating and joint type customized per platform

The thermal management controller is included in FinDreams Technology's vehicle thermal management product line and incorporates a domain controller (DCU), featuring high integration, simplification, arbitrary combination, and customized development (Source: FinDreams Technology vehicle thermal management technical materials '[Domain Controller]'). FinDreams Technology is a Tier 1 supplier capable of self-developing controllers, with products including electric compressor controllers and PTC controllers (Source: Sihan Industrial Research Institute). Market performance of thermal management EDC (electronic control/controller): from January to April 2024, thermal management EDC installations reached 888,023 units, capturing a 27.6% market share and ranking first; in 2024, both thermal management EDC and electric compressor installation shares ranked first in the industry (31.9%) (Source: Gasgoo Automotive Research Institute / East Money). The controller is deeply integrated with the compressor and PTC (e.g., the 'Compressor-PTC 2-in-1' integrates the PTC controller with integrated high-efficiency electronic control technology and IGBT cooling technology).

Includes domain controller (DCU) with high integration and custom development; self-developed by Tier 1 FinDreams; 2024 Jan-Apr EDC installations 888,023 units at 27.6% share (No.1); 2024 installation share 31.9% industry leader; deeply integrated with compressor/PTC and IGBT cooling

Exhibited by FinDreams Technology at the 2023 CCA Thermal Management Annual Conference as 'Compressor-PTC 2-in-1 (Compressor & PTC 2 in 1)' (Source: 2023 Annual Conference). Platform-based design 28-34-38-42-46CC; integrated PTC controller with integrated high-efficiency electronic control technology and IGBT cooling technology; high-efficiency scroll technology and high-efficiency motor technology; flexible manufacturing technology and high-reliability design; low-noise and low-vibration design with modal topology design (Source: ibid.). In 2022, the '2-in-1' electric compressor integrating the PTC controller was launched (Source: enterprise research materials). This integration solution innovates the structure by combining the compressor and the PTC high-voltage controller, reducing system cost (Source: TIMER Thermal Management 'Thermal Variable' interview with Chen Xuefeng).

Platform design 28-34-38-42-46CC; integrated PTC controller with high-efficiency electronic control and IGBT cooling; high-efficiency scroll and motor technology; low-noise low-vibration modal topology design; 2-in-1 compressor launched in 2022

Core valves self-developed by FinDreams Technology, essentially covering the full chain from R&D to production (Source: Yiche/Sohu 'FinDreams Technology Deeply Cultivates Automotive Thermal Management'). Four-way reversing valve: the core reversing component of the heat pump system, enabling switching between cooling and heat pump modes. Electronic expansion valve (EXV/Electronic Expansion Valve): fast response and precise control, distributing cooling capacity to refrigeration and battery cooling on demand. Solenoid valve: multi-path control of the heat pump air-conditioning system (schematic labels solenoid valves 1-5). Three-way water valve: simplifies the water circuit system and precisely controls the heat distribution for heating and battery heating. Check valve: prevents backflow of refrigerant/coolant (Source: FinDreams Technology vehicle thermal management technical materials, heat pump schematic).

Four-way reversing valve switches cooling/heat pump modes; electronic expansion valve (EXV) distributes cooling on demand; solenoid valve for multi-path control; three-way water valve for precise heat distribution; check valve prevents backflow

The cooling module is included in FinDreams Technology's vehicle thermal management product line (Source: vehicle thermal management product line materials). The heat pump air-conditioning system schematic covers core heat exchange and circulation components including the outdoor heat exchanger, indoor condenser, indoor evaporator, plate heat exchanger, battery pack heat exchanger, accumulator, and heater core (Source: FinDreams Technology vehicle thermal management technical materials). Plate heat exchanger: used for refrigerant-coolant heat exchange for battery cooling/heating. Electric water pump (E-Pump): drives coolant circulation, coordinating with three-way/four-way water valves to achieve heat distribution. Cooling module: the front-end cooling module (condenser + radiator + electric fan) coordinates cabin, battery, and motor/electronic control heat dissipation (Source: vehicle thermal management technical materials). Specific parameters such as heat exchange area, air volume, and pressure resistance are not publicly disclosed and are customized per vehicle platform.

Front-end cooling module (condenser + radiator + electric fan); plate heat exchanger for battery cooling/heating refrigerant-coolant exchange; electric water pump (E-Pump) drives coolant circulation; heat exchange area/air volume/pressure resistance customized per platform