NOVELTY - The system has a sensor monitoring subsystem (1811) coupled to a sensor. The sensor monitoring subsystem outputs a first signal when characteristic of a coolant monitored by the sensor is within a preset range of values and outputs a second signal when the characteristic monitored by the sensor is outside of the preset range of values, where deformation of deformable cooling conduits due to the object striking a lower surface of a lower battery pack enclosure panel causes the characteristic monitored by the sensor to fall outside of the preset range of values.    USE - Battery pack damage detection system for detecting catastrophic damage in a rechargeable battery pack of a vehicle e.g. ultra-low emission high efficiency car, electric vehicle and hybrid vehicle such as plug-in hybrid vehicle.    ADVANTAGE - The system utilizes an air gap to separate conduits from a lower enclosure panel and minimizes a number of stand-offs when an object hits the lower surface of the panel, so that the panel can be deformed before impacting the deformable cooling conduits, thus enhancing protection of batteries. The cooling conduits are positioned between the batteries and the deformed panel when road debris or obstacles hit a bottom of the battery pack with sufficient force to potentially damage the batteries within the pack, thus preventing catastrophic damage to the pack by absorbing impact energy. The system reduces or eliminates a load to prevent affected batteries from entering into thermal runaway. The system allows a reporting system to simply record an event using an on-board system i.e. memory, thus allowing a service personnel to determine extent of damage, damage timing and efficacy of a damage monitoring system.    DETAILED DESCRIPTION - The system has a thermal insulator that is formed with a layer of thermally insulating material. The characteristic of the coolant comprises a coolant flow rate and pressure. The sensor is a flow rate sensor or a pressure sensor.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a control system for use with a battery pack cooling conduit deformation monitoring system.    Rechargeable battery pack (1801)    Sensor monitoring subsystem (1811)    Controller (1813)    Cooling system's control valves (1825)    Mobile telecommunication link (1833)