Fuel cell comprising a bipolar module capable of generating heat

A fuel cell extending longitudinally along a stacking axis, the fuel cell comprising:

• alternating bipolar modules and membrane-electrode assemblies so as to form a stack comprising at least one electrochemical cell,
• two end plates extending to ends of the stack, each of the bipolar modules comprising at least one first main channel for circulation of an oxidizing fluid, a second main channel for circulation of a reducing fluid and a third main channel for circulation of a heat-transfer fluid,
• at least one heating module mounted between the end pates, comprising at least one auxiliary channel comprising a catalyst chemical element, the at least one auxiliary channel being configured to circulate a mixture of the oxidizing fluid and the reducing fluid so as to generate heat during reaction of the oxidizing fluid, the reducing fluid and the catalyst chemical element in order to heat the fuel cell,
• at least one bipolar module being used as the at least one heating module so as to define a mixed module, the mixed module comprising at least one first main channel for the circulation of the oxidizing fluid, a second main channel for the circulation of the reducing fluid, a third main channel for the circulation of the heat-transfer fluid and an auxiliary channel, comprising a catalyst chemical element, which is configured to circulate a mixture of the oxidizing fluid and the reducing fluid,
• the mixed modules comprises a first bipolar plate and a second bipolar plate, the first bipolar plate and the second bipolar plate each comprising at least one concave portion external to the mixed module and one convex portion internal to the mixed module, the convex portion of the first bipolar plate being positioned opposite the convex portion of the second bipolar plate, the convex portions mounted opposite one another forming a circulation channel, wherein the mixed modules comprises a spacer plate, mounted between the first bipolar plate and the second bipolar plate so as to form in the circulation channel, the third main channel for the circulation of the heat-transfer fluid and the auxiliary channel.