What is the voltage of the battery in the Lexus CT 200h hybrid?
The high-voltage battery in the Lexus CT 200h is a nickel-metal hydride (NiMH) pack with a nominal voltage of about 201.6 volts. This is the main energy source for the electric drive, separate from the 12-volt auxiliary battery used for starting, lighting, and accessories. In operation, the pack voltage varies with state of charge and driving conditions, typically fluctuating in the roughly 170–240 V range.
Battery type and nominal voltage
The CT 200h uses a NiMH high-voltage battery as part of Toyota’s Hybrid Synergy Drive. The nominal voltage is about 201.6 volts, achieved with 168 cells in series (each cell around 1.2 V) to form the pack.
Key figures you should know about this pack are summarized below.
- Nominal voltage: 201.6 V
- Cell configuration: 168 NiMH cells in series
- Approximate operating range: typically ~170–240 V depending on state of charge and temperature
In practical terms, this voltage level is what powers the electric motor during electric-drive operation and during regenerative charging, with the engine and inverter managing transitions between power sources for efficiency.
Voltage in practice and safety considerations
During normal driving, the pack voltage will rise toward the upper end of its range when the system is charging (regen braking) and fall when more energy is drawn for propulsion. The high-voltage system is isolated and requires proper safety procedures and equipment to access. The vehicle’s 12-volt battery handles routine starting and electronics when the car is off, while the HV battery remains dedicated to propulsion and energy recovery.
Summary
Overall, the Lexus CT 200h’s high-voltage battery sits at a nominal 201.6 volts (NiMH, 168 cells in series). Real-world voltage varies with state of charge and temperature, and it is managed by Toyota’s Hybrid Synergy Drive to balance performance, efficiency, and safety.
Note: Values can vary slightly by model year and regional specification.
