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jelly roll

n. (alternative spelling of jellyroll English)

Wikipedia
Jelly roll

Jelly roll may refer to:

  • Swiss roll, a cake
Jelly roll (slang)

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Jelly roll (battery)

The jelly roll or Swiss roll design is the design used in the majority of cylindrical rechargeable batteries, including nickel-cadmium (NiCd), nickel-metal hydride (NiMH) and lithium-ion (Li-ion).

In this design, an insulating sheet is laid down, then a thin layer of an anode material is laid down, a separator layer is applied, and a cathode material is layered on top. This sandwich is then rolled up and inserted into a hollow cylinder casing. The battery is sealed, metal contacts are attached, and an optional button top is applied if the battery is intended to replace an AAA/AA/C/D alkaline battery. A label with the brand name is then applied, or a blank protective label, often green ( NiMh) or blue ( NiCd), for a generic or OEM battery.

The design gets its name because the cross section of the battery looks like a Swiss roll cake. Occasionally the design is also used for primary (non-rechargeable) batteries, although most primary batteries use the conventional rod-paste-tube design.

Usage examples of "jelly roll".

I'm not sure who it was now, maybe Manuel Perez, maybe Jelly Roll Morton –.

My husband used to play with Jelly Roll Morton, and he invented the blues.

The insinuating rhythms were a part of it, too, he supposed, all that Bunk Johnson, Muggsy Spanier, King Oliver, Louis Armstrong, Jelly Roll Morton that he pretended to understand but only felt.

It was a piece of jelly roll and a hamburger, all squashed together, and I hogged it down.

Sissy took a ball of stiff yellow dough, rolled it flat with the rolling pin, then rolled the flat dough up like a jelly roll.