A new patent application filed by Apple to the US Patent and Trademark Office displays a new battery design with curved cells and irregular shapes. The company is working on a slimmer and curved design for the battery in order to change the aspect of some sharper iOS devices.
The patents called “Curved battery cells for portable electronic devices” and “Non-rectangular batteries for portable electronic devices” describe some methods in which the battery can be produced and designed in a different manner, in order to be incorporated into slim, new devices chassis.
Moreover, the application represents various cells, which will be manipulated during the production process in order to ease the installation into a curved and non-rectangular device designs.
In the same time, the invention describing the curved battery uses industry standard production techniques, which will reveal a new set of layers, a cathode an anode, a separator and active coatings. In this respect, Apple already proposed a new design, which uses a flexible pouch to enclose the cell layers created by the separator.
The curved battery is produced by exposing the pouch to a pressure of 0.13 kilogram-force per square millimeters and a heat of about 85 degrees Celsius. Then the pouch will be placed it in a set of curved plates in order to set the shape. As developer suggested within the patent application, the production process might last as long as four hours.
According to the patent description, “the curve is formed to facilitate efficient use of space inside a portable electronic device. For example, the curve may be formed at one or more ends of the battery cell to allow the battery cell to occupy a curved and/or rounded space within the enclosure of a laptop computer, tablet computer, mobile phone, personal digital assistant, digital camera, portable media player and/or other type of battery-powered electronic device.”
However, in some cases, the curve is held by using a binder coating within the battery cell, which is activated during the process. The structure resulted from the process will become solid, and it will take the shape of the curved plates.
In the case of the second application, the “Non-rectangular batteries for portable electronic devices”, developers use the same curving method. However, the only difference is the fact that the method requires removing the material from the battery before stacking the cell layers.
All these are only some rumors but the battery designs could be used in a next version of iPhone and iPad. Since Apple has gained the popularity of the market with iPhone 5 and iPad Mini, the above mentioned patents might describe something real and planned.