Jelly roll (battery)
Encyclopedia
The jelly roll or Swiss roll design is the design used in the majority of cylindrical rechargeable batteries
. In this design, an anode
material is laid down, a separator is applied, and a cathode
material is laid down. This is then rolled up and inserted into a hollow cylinder. The battery is then sealed and an optional button top is applied if the battery is intended to replace a 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
. Occasionally the design is used for primary (non-rechargeable) batteries, although most primary batteries use the conventional rod-paste-tube design.
Rechargeable battery
A rechargeable battery or storage battery is a group of one or more electrochemical cells. They are known as secondary cells because their electrochemical reactions are electrically reversible. Rechargeable batteries come in many different shapes and sizes, ranging anything from a button cell to...
. In this design, an anode
Anode
An anode is an electrode through which electric current flows into a polarized electrical device. Mnemonic: ACID ....
material is laid down, a separator is applied, and a cathode
Cathode
A cathode is an electrode through which electric current flows out of a polarized electrical device. Mnemonic: CCD .Cathode polarity is not always negative...
material is laid down. This is then rolled up and inserted into a hollow cylinder. The battery is then sealed and an optional button top is applied if the battery is intended to replace a AAA/AA/C/D alkaline battery
Alkaline battery
Alkaline batteries are a type of primary batteries dependent upon the reaction between zinc and manganese dioxide . A rechargeable alkaline battery allows reuse of specially designed cells....
. A label with the brand name is then applied (or a blank protective label, often green (NiMh) or blue (NiCd
Nickel-cadmium battery
The nickel–cadmium battery ' is a type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes....
), for a generic or OEM battery). The design gets its name because the cross section of the battery looks like a Swiss roll
Swiss roll
A Swiss roll or jelly roll is a type of sponge cake roll. The thin cake is made of eggs, flour and sugar and baked in a very shallow rectangular baking tray, called a sheet pan. The cake is removed from the pan and spread with jam or buttercream, rolled up, and served in circular slices.The...
. Occasionally the design is used for primary (non-rechargeable) batteries, although most primary batteries use the conventional rod-paste-tube design.