EV Battery Pack 300V/350V (30kWh - 70kWh) for 150kW Electric Vehicles
- Voltage Architecture: 300V / 350V Nominal
- Capacity Options: 30kWh, 40kWh, 50kWh, 70kWh
- Max Continuous Power Output: 150kW
- Integrated Liquid Cooling Thermal System
Directly sourced, modularly engineered, and scalable battery systems designed for EV passenger vehicles, heavy commercial fleets, marine propulsion, and automated manufacturing lines.
Backbone engineering, advanced software customization, and ISO certified quality systems tailored for international vehicle original equipment manufacturers.
Our engineering ecosystem includes custom-designed Low Voltage (LV) and High Voltage (HV) Battery Management Systems. Utilizing our license-free AlterVU software, OEMs gain real-time access to live cell telemetry, active balancing parameters, and CANbus protocol adaptation.
From initial 3D mechanical CAD modeling to fully validated End-of-Line testing, all battery systems undergo rigorous international certification compliance including UN 38.3 (Transport Safety), IEC 62619, and UL 2580 standards for heavy traction power.
We do not lock buyers into single chemistry constraints. Our production architecture spans high-density NMC (Nickel Manganese Cobalt) for maximum range, ultra-stable LiFePO4 (Lithium Iron Phosphate) for fleet longevity, and LTO (Lithium Titanate Oxide) for extreme climate operation.
The global transition to electrification across passenger cars, commercial transport, marine propulsion, and heavy industrial machinery requires a fundamental rethink of energy storage engineering. As a specialized OEM/ODM Electric Vehicle Battery Pack Assembly Factory and Exporter, we bridges the gap between raw electrochemical cell supply and turn-key vehicle system integration. Designing an EV battery pack is no longer simply placing cells in series and parallel; it is a multi-physics engineering challenge involving mechanical structural integrity, thermal runaway containment, high-voltage electrical architecture, and real-time cloud diagnostic telemetry.
Modern international safety standards (such as UN ECE R100 Rev 3 and China GB 38031) mandate that in the event of a single cell thermal runaway, no fire or explosion shall exit the battery pack for at least 5 minutes, allowing safe passenger evacuation. Our custom OEM packs utilize dual-stage aerogel insulation barriers, localized phase-change material (PCM) sinks, and directional burst pressure relief vents to prevent cascading cell propagation.
Selecting the optimal electrochemical architecture forms the foundation of any vehicle development project. Procurement teams must weigh specific energy density (Wh/kg), volumetric density (Wh/L), cycle life expectations, cold-weather performance degradation, and raw material cost dynamics.
| Lithium Chemistry Type | Gravimetric Energy Density | Cycle Life (80% DoD) | Thermal Runaway Temp | Ideal OEM Vehicle Application |
|---|---|---|---|---|
| LiFePO4 (LFP) | 140 - 185 Wh/kg | 4,000 - 6,000+ | ~270°C (Exothermic) | Commercial Buses, Last-Mile Delivery Vans, Mining Trucks, Forklifts |
| NMC 811 (High Nickel) | 250 - 300 Wh/kg | 1,500 - 2,500 | ~210°C (Exothermic) | High-Range Passenger EVs, Performance Sports Cars, Drones |
| LTO (Lithium Titanate) | 80 - 110 Wh/kg | 15,000 - 20,000 | >300°C (Ultra Stable) | Ultra-Fast Charge Harbors, Extreme Cold (-40°C) Marine & Locomotives |
| Semi-Solid State | 320 - 360 Wh/kg | 2,000+ | ~350°C (High Safety) | Next-Gen Luxury EVs & Long-Haul Aviation/Aerospace |
Tier-1 OEMs are rapidly shifting from legacy 400V battery architectures to 800V nominal architectures. The physical advantage is clear: doubling the system voltage halves the current required to deliver equivalent power ($P = V \times I$). Lower current reduces resistive heat generation ($P_{loss} = I^2 R$), allowing thinner copper wiring harnesses, saving up to 30kg in vehicle curb weight, and enabling 350kW+ DC fast charging (10% to 80% charge in under 15 minutes). Our assembly line is engineered specifically to withstand 1000V insulation testing, dielectric breakdown validation, and creepage/clearance distance compliance required for 800V SiC power electronics.
Traditional battery packs utilize modules (cells stacked in module housings, connected by busbars, secured inside an outer battery tray). Module housings account for up to 40% of a pack's structural dead weight. Modern OEM trends prioritize Cell-to-Pack (CTP 3.0), eliminating intermediate module hardware. By bonding high-capacity prismatic LFP or pouch cells directly into the outer structural aluminum tray using structural epoxy adhesives, volumetric utilization increases from 45% to over 65%, significantly expanding usable battery range without increasing overall chassis dimensions.
Global exporters face evolving regulatory hurdles. The European Union's mandate for a digital "Battery Passport" requires full supply chain traceability for cobalt, lithium, nickel, and natural graphite, along with verified carbon footprint metrics from raw material extraction to final assembly. As an ISO certified factory, our MES (Manufacturing Execution System) assigns unique QR codes to every cell block, recording laser weld impedance data, curing time, module test logs, and raw material lot numbers for seamless global compliance.
The Battery Management System (BMS) acts as the brain of the electric vehicle. Traditional BMS units rely on static lookup tables to estimate State of Charge (SoC) and State of Health (SoH). Next-generation OEM implementations integrate edge-computing microcontrollers paired with telemetry modules that stream high-frequency voltage, current, and temperature data to cloud-based Digital Twin models. Machine learning algorithms analyze electrochemical impedance spectroscopy (EIS) signatures in real-time, predicting internal micro-short circuits or lithium plating hours before thermal anomalies occur.
Managing heat generation during continuous 3C+ fast-charging cycles is vital to battery longevity. Modern assembly lines utilize friction-stir welded aluminum serpentine liquid cooling plates located beneath cell bases, flowing a 50/50 ethylene glycol-water mixture. For ultra-high performance applications (such as electric hypercars or heavy-duty racing craft), direct fluid immersion cooling—where non-conductive dielectric fluid circulates directly around individual cell terminals—is emerging as the gold standard, offering 10x higher heat transfer coefficients than traditional cold plates.
Combining European design quality standards with agile, high-precision overseas manufacturing scale.
Zero performance bottlenecks. Every single cell entering our production facility undergoes automated sorting by internal resistance (IR accuracy ±0.05mΩ) and capacity (voltage grading within ±2mV) before pack formation.
Eliminating manual soldering heat degradation. We utilize high-power CNC fiber laser welding workstations to join aluminum and copper busbars, achieving minimal contact resistance (<10μΩ) and high mechanical vibration endurance.
Water ingress is catastrophic for high-voltage power packs. Our finished battery enclosures are pressurized with helium gas inside vacuum test chambers to verify sealed protection up to IP67 / IP69K ingress ratings.
Answers to common technical, engineering, and international export logistics questions asked by OEM procurement managers.
Connect directly with our senior battery system engineers. Request custom technical proposals, 3D CAD step files, or factory audit credentials for your upcoming OEM/ODM project.