The disclosure relates to the technical field of batteries, and provides a battery manufacturing method and a battery. The battery manufacturing method includes the following steps. Providing a first casing that includes one of an upper cover and a bottom plate of a battery casing, and laminating on the first casing to form a laminated cell.

A top cover for a power battery including a top cover plate, a first post, a first fastener, a second post, a first sealing member, and an insulation plate.

A positive electrode sheet containing a high-safety heat-sensitive coating and a lithium-ion battery containing the positive electrode sheet are provided. The heat-sensitive coating includes a first conductive agent, a first binder, heat-sensitive polymer microspheres and an auxiliary agent, and has a conductive property at normal temperature and also has advantages of increasing a contact area between an active material and a current collector, improving the conductivity, and effectively reducing the polarization of battery and the like; when the use temperature of the positive electrode sheet reaches 120° C. and above, the heat-sensitive polymer microspheres will melt to form a plurality of continuous electron blocking layers, current blocking occurs in the coating, an internal blocking forms inside the battery, thereby preventing the occurrence of further thermal runaway of lithium-ion battery.

A solid state battery that includes: a solid state battery laminate that includes at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer; a positive electrode terminal on a first side surface of the solid state battery laminate; a negative electrode terminal on a second side surface opposite the first side surface of the solid state battery laminate; and an insulating part having a sleeve shape in a sectional view of the solid state battery, the insulating part covering an active material part of at least one electrode layer of the positive electrode layer and the negative electrode layer in a boundary region with the external terminal.

Provided are a lower plastic member and a power battery. The lower plastic member includes a body protruding towards a jelly roll of the power battery to form a protruding portion. The protruding portion has at least one ventilation channel defined thereon. A gas in the power battery flows outside through the ventilation channel. The body has a liquid injection hole and a flow guide shroud provided thereon. The flow guide shroud is arranged at an opening on a side of the liquid injection hole facing towards the jelly roll. The flow guide shroud includes a shielding plate and a plurality of connection posts. The shielding plate has an inclined surface facing towards the body and inclined towards a side away from the body in a radially outward direction of the shielding plate.

Provided are a lower plastic member and a power battery. The lower plastic member includes a body protruding towards a jelly roll of the power battery to form a protruding portion. The protruding portion has at least one ventilation channel defined thereon. A gas in the power battery flows outside through the ventilation channel. The body has a liquid injection hole and a flow guide shroud provided thereon. The flow guide shroud is arranged at an opening on a side of the liquid injection hole facing towards the jelly roll. The flow guide shroud includes a shielding plate and a plurality of connection posts. The shielding plate has an inclined surface facing towards the body and inclined towards a side away from the body in a radially outward direction of the shielding plate.

Embodiments of the present disclosure provide a battery cell, a battery, a power consumption device, and a device and a method for manufacturing a battery cell. The battery cell may comprise an electrode assembly, a housing, an end cover, and a first insulation structure. The electrode assembly may comprise a first tab. The housing may accommodate the electrode assembly, the housing may have an opening, and a first limiting structure may be formed on an inner circumferential wall of the housing. The end cover may cover the opening, and in a thickness direction of the end cover, the first limiting structure may limit movement of the end cover in a direction towards the electrode assembly. The first insulation structure may be at least partially provided between the first tab and the first limiting structure, so as to insulate and isolate the first tab from the first limiting structure.

Embodiments of the present disclosure provide a battery cell, a battery, a power consumption device, and a device and a method for manufacturing a battery cell. The battery cell may comprise an electrode assembly, a housing, an end cover, and a first insulation structure. The electrode assembly may comprise a first tab. The housing may accommodate the electrode assembly, the housing may have an opening, and a first limiting structure may be formed on an inner circumferential wall of the housing. The end cover may cover the opening, and in a thickness direction of the end cover, the first limiting structure may limit movement of the end cover in a direction towards the electrode assembly. The first insulation structure may be at least partially provided between the first tab and the first limiting structure, so as to insulate and isolate the first tab from the first limiting structure.

An electrode assembly is provided and includes: a first electrode sheet comprising a first flat and straight portion and a first tab connected to an end portion of the first flat and straight portion along a first direction; a second electrode sheet comprising a second flat and straight portion, the first flat and straight portion and the second flat and straight portion being stacked along a second direction perpendicular to the first direction; a first separator and a second separator, the first separator comprising a first separation portion, a first bent portion and a first extension portion, and the second separator comprising a second separation portion, wherein the first separation portion and the second separation portion are positioned on both sides of the second flat and straight portion along the second direction respectively, and separate the first flat and straight portion from the second flat and straight portion.

A winding type battery cell includes a roll core and at least one electrode sheet unit. The roll core includes a positive connection part, a negative connection part and an insulation part located between the positive connection part and the negative connection part. The positive connection part and the negative connection part are respectively connected with two ends of the insulation part. The electrode sheet unit includes a positive electrode sheet, a negative electrode sheet and a separator. The positive electrode sheet and the negative electrode sheet are separated by the separator. The positive electrode sheet is connected with the positive connection part, and the negative electrode sheet is connected with the negative connection part. The winding type battery cell is formed by winding the electrode sheet unit around the roll core. A winding battery with the winding type battery cell is also provided.