Battery cell, and battery module and battery pack including same

Abstract

The invention provides a battery cell, and a battery module and a battery pack including the same. The battery cell includes: a case having an accommodation space formed therein and having one or both ends open in a longitudinal direction; a cover plate covering the open end or both ends of the housing; an electrode assembly housed in the housing space of the case and formed by stacking a plurality of electrode plates with a separator therebetween, and including an electrode connection portion extending from each of the plurality of electrode plates; and a terminal terminal bonded to the electrode connection portion, and a portion of which is exposed to the outside through the cap plate.

Description

technical field [0001] The present invention relates to a rechargeable and dischargeable secondary battery cell, a battery module formed by stacking a plurality of battery cells, and a battery pack in which a plurality of stacked battery cells are mounted. Background technique [0002] Unlike primary batteries, secondary batteries can be charged and discharged, so they can be used in various fields such as digital cameras, mobile phones, notebook computers, hybrid vehicles, and electric vehicles. Examples of the secondary battery include a nickel-cadmium battery, a nickel metal hydride battery, a nickel-hydrogen battery, and a lithium secondary battery. [0003] Among such secondary batteries, a lot of research is being conducted on lithium secondary batteries having high energy density and high discharge voltage, and in recent years, lithium secondary batteries have been manufactured as pouched type battery cells having flexibility. A plurality of battery cells are connect...

AI Technical Summary

Problems solved by technology

[0011] As described above, in the conventional battery cell 10, due to the sealing structure of the battery cell 10 itself, the welding structure of the electrode joint 25 and the bus bar 31, and the structure of the insulating member 35 provided between the bus bar 31 and the battery cell 10, etc. , there will be a large loss in the length direction of the battery cell 10

[0012] In addition, in the prior art pouch type battery cell 10, since the pouch 11 is formed of a flexible material without rigidity, it is easily deformed, and irregularities are formed on the bottom surface of the pouch 11 during the process of manufacturing the battery cell 10. shape, so the heat conduction between the bottom surface of the bag 11 and the opposing component (e.g., housing) is not smooth

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