Abstract: A cell module includes a unit cell, a sensor, a calculation device, a storage device, an assessment device and a controller. The sensor is connected to the unit cell. The calculation device is for calculating a value indicating the state of the unit cell on the basis of a value measured by the sensor. The storage device is for recording calculated values calculated by the calculation device. The assessment device is for assessing illegitimate usage of the cell module. The controller is for controlling the calculation device, the storage device, and the assessment device, the control device deleting calculated values recorded in the storage device and prohibiting recording of calculated values to the storage device when the assessment device assesses that illegitimate usage has occurred.

Abstract: A cell module includes a unit cell, a sensor, a calculation device, a storage device, an assessment device and a controller. The sensor is connected to the unit cell. The calculation device is for calculating a value indicating the state of the unit cell on the basis of a value measured by the sensor. The storage device is for recording calculated values calculated by the calculation device. The assessment device is for assessing illegitimate usage of the cell module. The controller is for controlling the calculation device, the storage device, and the assessment device, the control device deleting calculated values recorded in the storage device and prohibiting recording of calculated values to the storage device when the assessment device assesses that illegitimate usage has occurred.

Abstract: A traction drive fluid comprises a tractant selected from the specific types of hydrocarbons, carboxylates and carbonate, optionally an effective amount of a base oil selected from a mineral oil and a synthetic oil and additives selected from a viscosity index improver, a ashless dispersant, a phosphorus-containing additive, a friction adjusting agent, a metallic detergent, an oxidation inhibitor, a polar additive, a corrosion inhibitor, a rubber swelling agent, a antifoamer and a colorant.