VDA355 Battery Module Configurations Explained: Choosing the Right Voltage and Capacity
Introduction
Although all VDA355 battery modules share the same external dimensions, their internal electrical configurations can vary significantly depending on the arrangement of battery cells.
Selecting the appropriate configuration requires careful consideration of voltage requirements, capacity needs, system architecture, and specific application scenarios.
Why Different Configurations Exist
The VDA355 module is essentially a standardized housing designed to accommodate various combinations of battery cells. By adjusting the number of cells connected in series (S) or parallel (P), manufacturers can achieve different voltage and capacity ratings while maintaining the same mechanical footprint.
This modular approach simplifies battery pack design and offers greater engineering flexibility, allowing automakers to tailor modules to specific vehicle platforms without retooling the physical housing.
1P12S Configuration
The 1P12S configuration connects twelve cells in series, with no parallel connections.
Typical Specifications:
Nominal voltage: approx. 44.4V
Capacity: 50–58Ah
Energy: approx. 2.5kWh
Application: This configuration is widely used in passenger EV battery packs, where higher module voltage helps reduce overall system current, enabling thinner busbars and lower resistive losses.
2P6S Configuration
The 2P6S configuration arranges two cells in parallel, with six such groups connected in series.
Typical Specifications:
Nominal voltage: approx. 22.2V
Capacity: 100–122Ah
Energy: approx. 2.5kWh
Application: With its higher capacity, this design is frequently selected for commercial vehicles, industrial equipment, and battery systems that demand increased discharge capability and robust power delivery.
1P6S Configuration
The 1P6S configuration has gained significant traction with the introduction of larger-capacity battery cells.
Typical Specifications:
Nominal voltage: approx. 22.2V
Capacity: 104–122Ah
Energy: approx. 2.5–2.7kWh
Application: Compared with traditional 2P6S designs, the 1P6S configuration reduces the total number of cells, welding points, and interconnections while maintaining comparable energy output. This makes it an increasingly popular choice for next-generation EV platforms seeking cost and manufacturing efficiency.
3P4S Configuration
The 3P4S configuration delivers lower voltage but significantly higher capacity.
Typical Specifications:
Nominal voltage: approx. 14.8V
Capacity: 150–177Ah
Application: This layout is commonly used in applications requiring high current output at relatively low system voltages, such as heavy-duty industrial equipment and specialty commercial vehicles.
Configuration Comparison at a Glance
| Configuration | Voltage Level | Capacity Level | Typical Application |
|---|---|---|---|
| 1P12S | High | Medium | Passenger EVs |
| 2P6S | Medium | High | Commercial Vehicles |
| 1P6S | Medium | High | Next-Generation EV Platforms |
| 3P4S | Low | Very High | Industrial Equipment |
Compatible Battery Cells
The flexibility of the VDA355 platform extends to its compatibility with a wide range of cells from leading manufacturers:
| Cell Manufacturer | Typical Capacity | Compatible Configurations |
|---|---|---|
| CALB | 58Ah | 1P12S / 2P6S / 3P4S |
| CALB | 118Ah | 1P6S |
| CALB | 122Ah | 1P6S |
| SVOLT | 104Ah | 1P6S |
| SVOLT | 117Ah | 1P6S |
| EVE | 102Ah | 1P6S |
| REPT | 100–117Ah | 1P6S |
| Gotion | 104Ah | 1P6S |
Industry Trends and Future Outlook
As battery cell capacities continue to increase, larger-format cells are enabling simpler, more streamlined module structures. The growing adoption of 117Ah, 118Ah, and similar high-capacity cells is accelerating the industry-wide transition from traditional 2P6S modules toward more efficient 1P6S architectures.
This shift reduces manufacturing complexity, lowers material costs, and improves overall system reliability—key advantages as the EV market scales toward mass production.
Final Thoughts
Choosing the right VDA355 configuration is not merely a matter of voltage or capacity. Engineers must strike a balance across multiple dimensions:
Energy density
Manufacturing efficiency
Thermal management (e.g., high-voltage/low-current designs reduce ohmic heating, while high-capacity designs demand more uniform cooling)
System cost
Application-specific requirements (e.g., passenger vs. commercial vehicle duty cycles)
The flexibility of the VDA355 platform is precisely what has cemented its position as one of the industry’s most widely adopted standardized battery module formats. As cell technology evolves, so too will the configurations—but the VDA355 standard is well-positioned to remain a cornerstone of EV battery design for years to come.
