Battery cell, battery device, and electric device

Abstract

This application relates to a battery cell, a battery device, and an electrical appliance. The battery cell includes: a casing with an internal cavity, and an injection port on a first wall of the casing; an electrode assembly disposed within the cavity; and a lower plastic portion including a guide portion and at least two connecting portions. The guide portion covers the surface of the electrode assembly facing the first wall, and each connecting portion protrudes from the surface of the guide portion facing the first wall and connects the guide portion to the first wall. A drain port is formed between each pair of adjacent connecting portions, and each drain port communicates with the injection port and its opening direction intersects the thickness direction to guide the electrolyte injected through the injection port to the outer periphery of the electrode assembly. This application can reduce the impact of the electrolyte on the electrode assembly on the one hand, and on the other hand, ensure that the electrolyte always flows directionally into the bottom of the electrode assembly through each drain port, and then the electrolyte wets the electrode assembly from bottom to top, which can make the electrode assembly more fully wetted, thereby reducing the probability of lithium plating.

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