The present application provides a cooling component and a battery pack. The cooling component include: a cooling bottom plate supporting bottoms of a battery cell; and a cooling side plate bent and connected to one side of the whole of the cooling bottom plate, and the cooling side plate abuts on and is thermally conductively connected to one side of the battery cell. The cooling side plate includes a flow channel part and a buffered part. The flow channel part is provided with one or more cooling flow channels. Each cooling flow channels is configured to circulate the cooling medium. The buffered part is provided with a buffer cavity, and the buffer cavity extends along a length direction of the cooling side plate.

An HVAC heat exchanger with an array of tubes including one or more dead tubes is provided. In one embodiment, the heat exchanger is a microchannel heat exchanger operable to exchange heat with air in an HVAC system via refrigerant passing through the microchannel heat exchanger. The microchannel heat exchanger includes an array of flat tubes arranged between a first manifold and a second manifold. The array of flat tubes includes multiple tubes coupled in fluid communication with the first manifold and the second manifold to convey refrigerant between the first manifold and the second manifold through microchannels of the multiple tubes. The array of flat tubes also includes one or more dead tubes that do not convey refrigerant between the first manifold and the second manifold. Additional systems, devices, and methods are also disclosed.