Embodiments of the present application disclose a battery cell, a battery, a power consumption device, a method and an apparatus for producing a battery cell. The power consumption device is equipped with the battery, the battery has one or more battery cells, where the battery cell includes: a housing, with a cylindrical accommodating cavity; and an electrode assembly, arranged in the accommodating cavity, and a projection of the electrode assembly along a height direction of the battery cell is a polygon. Even if the electrode assembly in the battery cell expands after charging and discharging, there is still a remaining space between the electrode assembly and an inner wall of the housing, thereby preventing an outer circumferential surface of the electrode assembly from being pressed by the housing, and the remaining space can allow the electrode assembly to expand to avoid a problem of performance degradation of the battery cell.

An electrochemical apparatus includes an electrode assembly, a packaging bag and a first connecting layer. The electrode assembly includes an adhesive layer. An outermost current collector of the electrode assembly includes a first bending portion, a second bending portion opposite to the first bending portion and a flat portion connected between the first bending portion and the second bending portion. The adhesive layer is pasted to a surface of the flat portion facing toward a winding center of the electrode assembly. The packaging, bag is configured to accommodate at least a part of the electrode assembly. The first connecting layer is pasted to the first bending portion and to a part of an outer surface of the flat portion. A projection of the second connecting, layer and a projection of the adhesive layer in a direction perpendicular to an outer surface of the flat portion have an overlapping zone.

This application relates to a separator, including a substrate and a coating layer provided on at least one surface of the substrate. The coating layer includes organic particles and inorganic particles, the organic particles include first-type organic particles, the inorganic particles form an inorganic particle layer, and the first-type organic particles are embedded into the inorganic particle layer and form bulges on a surface of the inorganic particle layer. A number-based median particle size of the first-type organic particles is ≥12 μm, and a ratio of an average height of the bulges to a thickness of the inorganic particle layer is ≥4. This application further relates to a separator preparation method, a secondary battery containing such separator, and a related battery module, battery pack, and apparatus.

A power storage device is provided with a movement restricting member including: an electrode-body bonding portion bonded to a fixing surface of a thickness-direction outside surface of outer surfaces of an electrode body; and an extended portion extending from the electrode-body bonding portion and protruding more than the electrode body in a movement restricting direction. When the electrode body moves in the movement restricting direction, the extended portion contacts an inner peripheral surface of a can, thereby restricting the electrode body from moving in the movement restricting direction.

A energy storage device for cycling between a charged state and a discharged state, the energy storage device including an enclosure, an electrode assembly and a non-aqueous liquid electrolyte within the enclosure, and a constraint that maintains a pressure on the electrode assembly as the energy storage device is cycled between the charged and the discharged states.

A battery module, a power battery pack and a vehicle are provided. The battery module comprises n cells. At least two surfaces of the cell are respectively provided with a first positive terminal and a first negative terminal, and a second positive terminal and a second negative terminal. The n cells are arranged side by side in series. The cell (100) has a length L and a width H, where L meets 600 mm<L≤1300 mm, and L and H meet 10<L/H≤20.

A battery unit includes a secondary battery, a first trap, and a second trap. The secondary battery includes a battery case provided with a gas vent valve, and an electrolyte solution enclosed in the battery case. The first trap includes a mesh material disposed outside the battery case so as to oppose and cover the gas vent valve. The second trap includes a liquid retaining material made of a non-flammable material and disposed further outward of the first trap so as to oppose and cover the gas vent valve.

An electrochemical cell pack includes a housing having an interior space; a plurality of electrochemical cells disposed within the interior space; a thermal management fluid disposed within the interior space such that the electrochemical cell is in thermal communication with the thermal management fluid; and one or more space fillers disposed with the interior volume and in direct contact with the thermal management fluid. The space fillers have a density that is less than the density of the thermal management fluid.

An electrochemical cell pack includes a housing having an interior space; a plurality of electrochemical cells disposed within the interior space; a thermal management fluid disposed within the interior space such that the electrochemical cell is in thermal communication with the thermal management fluid; and one or more space fillers disposed with the interior volume and in direct contact with the thermal management fluid. The space fillers have a density that is less than the density of the thermal management fluid.

A energy storage device for cycling between a charged state and a discharged state, the energy storage device including an enclosure, an electrode assembly and a non-aqueous liquid electrolyte within the enclosure, and a constraint that maintains a pressure on the electrode assembly as the energy storage device is cycled between the charged and the discharged states.