Abstract: An electrode assembly, a secondary battery, and an electronic device. One end of a first current collector in a width direction is provided with a plurality of extension members, a first surface of each extension member is provided with a plurality of protruding portions in a protruding manner, and a second surface of the extension member is provided with a plurality of recessed portions in a recessed manner. The electrode assembly includes adjacent extension members. When viewed along a thickness direction of the electrode assembly, two adjacent extension members at least partially overlap, and at least one protruding portion of one extension member is embedded in a recessed portion of another extension member adjacent thereto.

Abstract: A battery cell casing includes a shell (1) and a pressure relief mechanism (2), where the shell (1) is provided with a through-hole (20), the pressure relief mechanism (2) is disposed at the through-hole (20), and the pressure relief mechanism (2) includes an adhesive film (21) and a cover sheet (22). The cover sheet (22) is bonded to the shell (1) via the adhesive film (21) and covers the through-hole (20), and the adhesive film (21) is capable of melting under heat to form a pressure relief passage connecting the interior and exterior of the shell (1). A bonding area between the cover sheet (22) and the shell (1) is A, a cross-sectional area of the through-hole (20) covered by the cover sheet (22) is B, and 1.778 ? A B ? 1 ? 6 . 3 ? 6 ? 1 .

Abstract: A battery includes an electrode assembly, a packaging bag, and a tab. The electrode assembly is accommodated in the packaging bag. The packaging bag includes a first sealing edge, and the tab is connected to the electrode assembly and extends from the first sealing edge. The battery further includes a tab adhesive disposed between the first sealing edge and the tab. The tab adhesive includes a first adhesive layer, a second adhesive layer, and a third adhesive layer sequentially connected from the tab to the first sealing edge. In an stacking direction of the first adhesive layer, the second adhesive layer, and the third adhesive layer, a sum of thicknesses of the first adhesive layer, the second adhesive layer, and the third adhesive layer is 70 ?m to 100 ?m, and a thickness ratio of the first adhesive layer to the second adhesive layer satisfies 1:1.2-2.

Abstract: A battery cell includes a housing and a pressure relief mechanism. A first through-hole is created on the housing. The pressure relief mechanism covers the first through hole. A cover sheet in the pressure relief mechanism is bonded to the housing by the adhesive film. A first passivation layer is disposed on a surface of the cover sheet. The adhesive film is meltable by heat to make the cover sheet fall off to form a pressure relief channel communicating inside and outside of the housing.

Abstract: Embodiments of the present disclosure provide a method for manufacturing a fingerprint recognition method, a fingerprint recognition module, and a display device. The method for manufacturing the fingerprint recognition module includes: providing a backplane; forming a bonding terminal in a bonding area of the backplane; forming a sensing electrode in a fingerprint recognition area of the backplane; forming an insulation layer cladding the bonding terminal in the bonding area, and forming a piezoelectric material layer in the fingerprint recognition area, where an orthographic projection of the piezoelectric material layer on the backplane coincides with an orthographic projection of the sensing electrode on the backplane; performing polarization processing on the piezoelectric material layer; and peeling off the insulation layer.

Abstract: Embodiments of the present disclosure provide a method for manufacturing a fingerprint recognition method, a fingerprint recognition module, and a display device. The method for manufacturing the fingerprint recognition module includes: providing a backplane; forming a bonding terminal in a bonding area of the backplane; forming a sensing electrode in a fingerprint recognition area of the backplane; forming an insulation layer cladding the bonding terminal in the bonding area, and forming a piezoelectric material layer in the fingerprint recognition area, where an orthographic projection of the piezoelectric material layer on the backplane coincides with an orthographic projection of the sensing electrode on the backplane; performing polarization processing on the piezoelectric material layer; and peeling off the insulation layer.