A battery packaging material including a laminate including at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealable resin layer in this order, in which crushing of the adhesive layer is effectively prevented when the heat-sealable resin layer is heat-sealed with itself, and a high sealing strength is achieved in a high-temperature environment. The battery packaging material includes a laminate including at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealable resin layer in this order, wherein the adhesive layer has a logarithmic decrement ΔE of 2.0 or less at 120° C. according to rigid-body pendulum measurement.

A battery packaging material including a laminate including at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealable resin layer in this order, in which crushing of the adhesive layer is effectively prevented when the heat-sealable resin layer is heat-sealed with itself, and a high sealing strength is achieved in a high-temperature environment. The battery packaging material includes a laminate including at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealable resin layer in this order, wherein the adhesive layer has a logarithmic decrement ΔE of 2.0 or less at 120° C. according to rigid-body pendulum measurement.

A surface-treated steel sheet for a battery container includes a steel sheet, an iron-nickel diffusion layer formed on the steel sheet, and a nickel layer formed on the iron-nickel diffusion layer and constituting the outermost layer. When the Fe intensity and the Ni intensity are continuously measured from the surface of the surface-treated steel sheet for a battery container along the depth direction with a high frequency glow discharge optical emission spectrometric analyzer, the thickness of the iron-nickel diffusion layer being the difference (D2−D1) between the depth (D1) at which the Fe intensity exhibits a first predetermined value and the depth (D2) at which the Ni intensity exhibits a second predetermined value is 0.04 to 0.31 μm; and the total amount of the nickel contained in the iron-nickel diffusion layer and the nickel contained in the nickel layer is 10.8 to 26.7 g/m2.

A surface-treated steel sheet for a battery container includes a steel sheet, an iron-nickel diffusion layer formed on the steel sheet, and a nickel layer formed on the iron-nickel diffusion layer and constituting the outermost layer. When the Fe intensity and the Ni intensity are continuously measured from the surface of the surface-treated steel sheet for a battery container along the depth direction with a high frequency glow discharge optical emission spectrometric analyzer, the thickness of the iron-nickel diffusion layer being the difference (D2−D1) between the depth (D1) at which the Fe intensity exhibits a first predetermined value and the depth (D2) at which the Ni intensity exhibits a second predetermined value is 0.04 to 0.31 μm; and the total amount of the nickel contained in the iron-nickel diffusion layer and the nickel contained in the nickel layer is 10.8 to 26.7 g/m2.

A battery cell has a plurality of electrode units in a common battery cell housing. Each of the electrode units includes a protective film having an inner layer and an outer layer, where the inner layer is arranged on the electrode unit and the outer layer is arranged on the inner layer. The outer layer has a higher melting point than the inner layer.

A battery cell has a plurality of electrode units in a common battery cell housing. Each of the electrode units includes a protective film having an inner layer and an outer layer, where the inner layer is arranged on the electrode unit and the outer layer is arranged on the inner layer. The outer layer has a higher melting point than the inner layer.

The present application relates to a secondary battery and a battery module, a battery pack and an apparatus containing the secondary battery. In particular, the secondary battery includes a positive electrode plate, a negative electrode plate, a separator and an electrolyte, characterized in that: the secondary battery satisfies the following formula I: 2≤|(AF/AE−1)/(CE/CF−1)|≤7 (Formula I).

Disclosed is a battery, including a battery cell body and a packaging housing. The packaging housing has an edge banding and a cavity, and the edge banding has a cross section. The edge banding extends upwards along a side surface of the battery cell body, a side surface, close to the battery cell body, of the edge banding is an inner side surface, and a side surface, away from the battery cell body, of the edge banding is an outer side surface. The cross section is provided with a first bonding body, and the first bonding body wraps the cross section, a part of the inner side surface and a part of the outer side surface of the edge banding. A lower edge of the first bonding body on the inner side surface is higher than a lower edge of the first bonding body on the outer side surface.

Disclosed is a battery, including a battery cell body and a packaging housing. The packaging housing has an edge banding and a cavity, and the edge banding has a cross section. The edge banding extends upwards along a side surface of the battery cell body, a side surface, close to the battery cell body, of the edge banding is an inner side surface, and a side surface, away from the battery cell body, of the edge banding is an outer side surface. The cross section is provided with a first bonding body, and the first bonding body wraps the cross section, a part of the inner side surface and a part of the outer side surface of the edge banding. A lower edge of the first bonding body on the inner side surface is higher than a lower edge of the first bonding body on the outer side surface.

This application discloses an electric core, an electronic device and a method for packaging an electric core. The electric core includes a shell and a battery cell, the shell includes a steel lower shell and a steel upper shell, surfaces of the upper shell and the lower shell are provided with insulating layers, the lower shell and the upper shell are hermetically connected by welding to form a sealed cavity, the shell is provided with a positive contact plate and a negative contact plate; the battery cell is a laminated battery cell fixed in the sealed cavity, and a positive lug and a negative lug of the laminated battery cell are respectively connected with the positive contact plate and the negative contact plate.