A film-clad battery cell appearance defect detection apparatus , comprising a first detection assembly comprising a first image collector and a first light source , wherein the first light source is used to emit first light toward a detection surface of a battery cell , the first light being adapted to pass through an outer film of the battery cell , and the first light forming a first included angle (α) with the detection surface , and the first image collector is used to collect a first image of the position on the battery cell irradiated by the first light ; a second detection assembly comprising a second image collector and a second light source , wherein the second light source is used to emit second light toward the detection surface , the second light forming a second included angle (β) with the detection surface , and the second image collector is used to collect a second image of the position on the battery cell irradiated by the second light , with the second included angle (β) being less than the first included angle (α); and a control assembly connected respectively with the first image collector and the second image collector , the control assembly being constructed to detect appearance defects of the battery cell according to the first image and the second image, wherein the appearance defects comprise defects between the outer film and a shell of the battery cell and defects on the outer film; wherein the first light and the second light are both infrared scanning light; and wherein the wavelength of the first light and the wavelength of the second light are both wavelengths which satisfy the relational expression: 800 nm ≤ λ ≤ 900 nm. a first detection assembly comprising a first image collector and a first light source , wherein the first light source is used to emit first light toward a detection surface of a battery cell , the first light being adapted to pass through an outer film of the battery cell , and the first light forming a first included angle (α) with the detection surface , and the first image collector is used to collect a first image of the position on the battery cell irradiated by the first light ; a second detection assembly comprising a second image collector and a second light source , wherein the second light source is used to emit second light toward the detection surface , the second light forming a second included angle (β) with the detection surface , and the second image collector is used to collect a second image of the position on the battery cell irradiated by the second light , with the second included angle (β) being less than the first included angle (α); and a control assembly connected respectively with the first image collector and the second image collector , the control assembly being constructed to detect appearance defects of the battery cell according to the first image and the second image, wherein the appearance defects comprise defects between the outer film and a shell of the battery cell and defects on the outer film; wherein the first light and the second light are both infrared scanning light; and wherein the wavelength of the first light and the wavelength of the second light are both wavelengths which satisfy the relational expression: 800 nm ≤ λ ≤ 900 nm. <EOS>