Abstract: A battery pack connection scheme is shown that provides an optimum DC environment for every cell in the pack, such that every cell in the same or similar voltage level in the pack sees exactly the same voltage and current environment. In some examples, a portable pack is provided having a positive load connection terminal and multiple batteries connected in parallel to the terminal. Connections are made with segments preferably have matching impedances, or have matching DC resistances, creating a uniform DC environment. Portable pack designs are provided including chargers and inverters connected in the uniform DC environment.

Abstract: A battery pack connection scheme is shown that provides an optimum DC environment for every cell in the pack, such that every cell in the same or similar voltage level in the pack sees exactly the same voltage and current environment. In some examples, a portable pack is provided having a positive load connection terminal and multiple batteries connected in parallel to the terminal. Connections are made with segments preferably have matching impedances, or have matching DC resistances, creating a uniform DC environment. Portable pack designs are provided including chargers and inverters connected in the uniform DC environment.

Abstract: An insulated refrigeration panel has a first skin and a second skin. The second skin is spaced generally parallel to the first skin. A first insulating body is sandwiched by the first skin and the second skin. The first skin, the second skin and the insulating body form a panel unit. A first snap fit connector and a second snap fit connector is integrally formed with the panel unit. The first snap-fit connector allows engagement of a mating connector along the first direction while the second snap-fit connector allows flexible engagement of a second mating connector along the second direction transfers to the first direction.