Electrical storage device thermal management systems

A Thermal management system comprising:

• a housing having an interior;
• a partition disposed within the housing interior and dividing the interior into first and second compartments, the first compartment being configured and adapted to house at least one capacitor, and the second compartment defining a coolant reservoir;
• and
• a fluid release member disposed in the partition and operably connecting between the first and second compartments, wherein the fluid release member is configured and adapted to release coolant from the second compartment into the first compartment using gravity to cool the at least one capacitor with a first compartment temperature in excess of a predetermined limit,
• wherein the coolant reservoir contains a coolant fluid sealed within the coolant reservoir,
• wherein the coolant reservoir is positioned adjacent to and above the first compartment to allow coolant movement from the coolant reservoir to the first compartment without requiring operation of a pump or other active cooling means upon release by the fluid release member into the first compartment.

A thermal management system comprising:

• a housing with an interior;
• a partition disposed within the housing interior and dividing the interior into first and second compartments, wherein the first compartment includes a plurality of vehicle electrical power storage devices, wherein the second compartment defining a coolant reservoir and containing a dielectric fluid;
• a fluid release member disposed in the partition and having first and second configurations, wherein in the first configuration the fluid release member isolates the dielectric fluid from the first compartment, wherein in the second configuration the fluid release member fluidly connects the second compartment with the first compartment;
• and
• a relief device disposed in the housing and having first and second configurations, wherein in the first configuration the relief device isolates the second compartment from the environment external to the housing, wherein in the second configuration the relief device fluidly connects the first compartment to the external environment through the second compartment when the fluid relief member is in the fluid release member second configuration;
• wherein the coolant reservoir contains a coolant fluid having the dielectric fluid and sealed within the coolant reservoir,
• wherein the coolant reservoir is positioned adjacent to the partition and above the first compartment to allow coolant movement from the coolant reservoir to the first compartment without requiring operation or a pump of other active cooling means when the fluid release member is in the second configuration.