Coolant storage tank

A coolant storage tank (1) for storing coolant in a fuel cell system (2), the coolant storage tank comprising a plurality of individually controllable heater elements (7, 8a, 8b). A coolant storage tank comprising a first heater element (7) located at a base of the coolant storage tank and a second heater element (8a) is also disclosed. A coolant storage tank comprising a first coolant storage compartment (50) in fluid communication with a second coolant storage compartment (51), the first coolant storage compartment including at least a first heater element (54) and wherein the second coolant storage compartment is unheated is also disclosed. A method of melting frozen coolant in a coolant storage tank is also disclosed. 种用于储存燃料电池系统(2)中的冷却剂的冷却剂储存箱(1)，所述冷却剂储存箱包括多个可单独控制的加热元件(7、8a、8b)。还公开了种冷却剂储存箱，所述冷却剂储存箱包括位于所述冷却剂储存箱的基部的第加热元件(7)和第二加热元件(8a)。还公开了种冷却剂储存箱，所述冷却剂储存箱包括与第二冷却剂储存隔室(51)流体连通的第冷却剂储存隔室(50)，所述第冷却剂储存隔室包括至少第加热元件(54)并且其中所述第二冷却剂储存隔室是非加热的。还公开了种融化冷却剂储存箱中的冻结冷却剂的方法。