(EN) The invention discloses a tab, a battery cell with the tab, a battery module and a battery pack. The tab comprises a first tab piece and a second tab piece, wherein the second tab piece is arranged on one side of the first tab piece in the thickness direction, at least one cooling cavity is defined between the second tab piece and the first tab piece, and the cooling cavity is filled with a cooling medium. According to the tab provided by the embodiment of the invention, the first tab piece and the second tab piece are arranged, the at least one cooling cavity is defined between the second tab piece and the first tab piece, and the cooling cavity is filled with the cooling medium, so that the tab has a relatively good heat dissipation effect, the temperatures of the tab and the battery cell can be effectively reduced, then the performance of the battery cell is more excellent, and the service life of the battery cell is prolonged.
(ZH) 本发明公开了一种极耳和具有其的电芯、电池模组和电池包,所述极耳包括:第一极耳片;第二极耳片,所述第二极耳片设在所述第一极耳片的厚度方向上的一侧,所述第二极耳片与所述第一极耳片之间内限定出至少一个冷却腔,所述冷却腔内填充有冷却介质。根据本发明实施例的极耳,通过设置第一极耳片和第二极耳片,并使第二极耳片与第一极耳片之间内限定出至少一个冷却腔且冷却腔内填充有冷却介质,具有较好的散热效果,可以有效降低极耳和电芯的温度,从而使电芯的性能更加优异,延长电芯的使用寿命。