Modular Battery System

Configured to your drive system: one main module plus 1 to 15 sub modules, always in series, set up by Formosa EV.

37.6 kWh

Eight modules for 400 V drive systems

MAIN BATTERY MODULE

Formosa EV Modular Battery System main module

Charged and discharged before shipment.

Your pack’s report proves it holds its rated kWh.

One main module and seven sub modules form the 37.6 kWh system. Formosa EV configures the BMS for your drive system.

View system specifications
Product overview
Overview
Technical specifications
Specs
Installation & Configuration
Installation

Product overview

Configured to your drive system: one main module plus 1 to 15 sub modules, always in series, set up by Formosa EV. Eight modules provide 37.6 kWh. The BMS and its wiring are built in; one 4-pin connector links the main module to the Vehicle Control Unit.

Touchproof high-voltage connections

Enclosed and ready to mount

Sealed IP67 aluminum modules with 12 threaded mounting points each; brackets need only 6. Stack modules, stand them on their side, or spread them around the car to help set weight balance.

Battery management built in

The main-module BMS monitors and balances every cell group. Cell-tap and temperature-sensor wiring is finished and sealed inside every module; no separate BMS box to mount.

Configured for your drive system

Formosa EV sets the BMS voltage limits for the selected motor and inverter.

Safety built in

The main module contains the service disconnect/main fuse, HV contactors, precharge, and isolation monitor. Every sub module has a built-in fuse.

One VCU connection

One 4-pin connector links the main module to the VCU: ground, switched 12 V, CAN high, and CAN low. Modules daisy-chain on the supplied harness.

Cooling in every module

Built-in liquid-cooling channels, with −6 AN male fittings supplied and manifolds available. Automotive- and aerospace-grade connectors carry the system’s electrical connections.

Series stack options

2–16 modules in series, configured by Formosa EV. Voltage and energy change with stack size; current ratings stay constant. No parallel wiring, mixed modules or builder expansion.

Tested before it ships

Every pack is charged and discharged before shipment. Its own report proves it holds its rated kWh, so you can count on the range.

Technical specifications

Eight-module specifications. Select each stack against the drive system’s voltage limit; Formosa EV configures the BMS accordingly.

Energy

37.6 kWh

Configuration

8 modules: 1 main, 7 sub; 2P96S

Nominal voltage

355.2 V

Min–max V

268.8–⁠403.2 V

Continuous discharge

106 A

Peak discharge

424 A (4C) for 10 s

Peak regeneration

240 A for 10 s

Maximum charging current

70 A

Main module weight

32 kg (71 lb)

Sub module weight

30 kg (66 lb) each

Eight-module system weight

242 kg (534 lb)

Discharge temperature

−30 to 55 °C (−22 to 131 °F)

Charge temperature

−10 to 55 °C (14 to 131 °F)

Sealing

IP67

VCU connection supply

9–⁠15 V switched, 50 mA

CAN

500 kbit/s

Main-module dimensions

497 × 329 × 134 mm (19.6 × 13.0 × 5.3 in)

Sub-module dimensions

422 × 329 × 134 mm (16.6 × 13.0 × 5.3 in)

Series stack options

Always in series. Current ratings stay constant. The eight-module 37.6 kWh system is highlighted.

Modules

Configuration

Nominal voltage

Min–max V

Energy

2

2P24S

88.8 V

67.2–⁠100.8 V

9.4 kWh

3

2P36S

133.2 V

100.8–⁠151.2 V

14.1 kWh

4

2P48S

177.6 V

134.4–⁠201.6 V

18.8 kWh

5

2P60S

222.0 V

168.0–⁠252.0 V

23.5 kWh

6

2P72S

266.4 V

201.6–⁠302.4 V

28.2 kWh

7

2P84S

310.8 V

235.2–⁠352.8 V

32.9 kWh

8

2P96S

355.2 V

268.8–⁠403.2 V

37.6 kWh

9

2P108S

399.6 V

302.4–⁠453.6 V

42.3 kWh

10

2P120S

444.0 V

336.0–⁠504.0 V

47.0 kWh

11

2P132S

488.4 V

369.6–⁠554.4 V

51.7 kWh

12

2P144S

532.8 V

403.2–⁠604.8 V

56.4 kWh

13

2P156S

577.2 V

436.8–⁠655.2 V

61.1 kWh

14

2P168S

621.6 V

470.4–⁠705.6 V

65.8 kWh

15

2P180S

666.0 V

504.0–⁠756.0 V

70.5 kWh

16

2P192S

710.4 V

537.6–⁠806.4 V

75.2 kWh

The pack’s voltage window, empty to full, at up to 4.2 V per cell. The BMS caps cell voltage to keep the pack within your drive system’s limits.

Installation and configuration

Builders supply brackets and bolts. Formosa EV includes HV cables made to your lengths and the low-voltage harnesses between modules.

Steel brackets at least 1/8 in (3 mm) thick.

Class 10.9 steel bolts or better; flanged hex heads recommended.

Mounting torque: 35 Nm (26 lb-⁠ft).

Attach brackets at structural chassis points. Each module has 12 threaded mounting points; brackets need only 6. Design consultation is available on request.

Lid up, lid down, or on either side, with the long axis horizontal (within 30°). Stack or distribute modules to suit the vehicle’s weight balance.

Discuss component selection and vehicle fit