BATTERY CELL, BATTERY MODULE, BATTERY PACK, DEVICE USING BATTERY CELL AS POWER SOURCE, AND ASSEMBLING METHOD OF BATTERY CELL

The present disclosure provides a battery cell, a battery module, a battery pack, a device using the battery cell as a power source, and an assembling method of the battery cell, wherein the battery cell comprising an electrode assembly () and an insulating support plate (), the electrode assembly () comprises a main body portion () and a tab () connected to the main body portion (), the insulating support plate () comprises a first support portion () and a second support portion () connected to the first support portion (), the first support portion () protrudes in a direction approaching the main body portion () relative to the second support portion () such that a first gap is formed between the second support portion () and the main body portion (), and at least a portion of the tab () is located in the first gap. The first gap formed between the second support portion and the main body portion can accommodate at least a portion of the tab to effectively protect the tab, prevent the tab from being compressed, reduce damages to the tab, and increase the service life of the battery.