Foil pack

An apparatus comprising:

• a foil pack defining a device enclosure;
• an energy storage device within the device enclosure, wherein the energy storage device includes a first conductor and a second conductor, wherein the first conductor and the second conductor extend from the device enclosure through a device enclosure wall defining the device enclosure;
• a fluid conduit including a conduit exterior and a conduit interior, the conduit interior defining a test port, defining a fluid channel opening which opens into the device enclosure, and defining a fluid channel which defines a flow path fluidically coupling the test port and the fluid channel opening;
• and
• a scaffolding within the fluid channel configured to resist a collapse of the fluid channel when a vacuum is established in the fluid channel relative to a pressure acting on the conduit exterior, wherein the apparatus is configured to shrink the fluid conduit toward the scaffolding when the vacuum is established in the fluid channel.

A method comprising:

• drawing a vacuum in a fluid channel defined by a fluid conduit using a test port defined by the fluid conduit, wherein the fluid conduit defines a fluid channel opening which opens into a device enclosure of a foil pack configured to enclose an energy storage device, and wherein the fluid channel defines a flow path fluidically coupling the test port and the fluid channel opening;
• drawing a vacuum in the device enclosure using the vacuum drawn on the fluid channel;
• and
• resisting a collapse of the fluid channel as the vacuum is drawn using a scaffolding within the fluid channel.