Battery

Abstract

This application discloses a battery comprising an electrode assembly and a packaging bag for housing the electrode assembly. The packaging bag has a nylon layer, the nylon layer contains a coloring agent, and the average value of the color difference L of the nylon layer is Let JPEG2026519299000037.jpg10144, and 6 ≤ The JPEG2026519299000038.jpg satisfies 10144≦12, and the standard deviation of the color difference L value of the nylon layer is σ, where σ≦0.2. The nylon layer itself contains a coloring agent. The color difference of the nylon layer can be changed by setting the amount of coloring agent and the thickness of the nylon material during the manufacturing of the nylon layer. The average value of the color difference L value of the nylon layer is then... JPEG2026519299000039.jpg10144 is 6 ≤ By satisfying the condition JPEG2026519299000040.jpg10144≦12 and the standard deviation σ of the color difference L value being σ≦0.2, uniformity of color difference is achieved. At the same time, because the nylon layer itself has a color tone during the manufacturing of the packaging bag, the nylon layer can be directly bonded to the metal layer, eliminating the need for fillers such as black ink. This improves the adhesion between the nylon layer and the metal layer, thereby enhancing the mechanical strength and die-cutting performance of the packaging bag.

Claims

[Claim 1] A battery comprising an electrode assembly and a packaging bag for housing the electrode assembly, The packaging bag has a nylon layer, The nylon layer contains a coloring agent, The average value of the color difference L value of the nylon layer Let 6 ≤ Satisfying ≤ 12, A battery characterized in that the standard deviation of the color difference L value of the nylon layer is σ, and σ ≤ 0.

2. [Claim 2] ７≦ The battery according to claim 1, characterized in that ≤ 9 and σ ≤ 0.

1. [Claim 3] The nylon layer includes a first sublayer, or The nylon layer comprises a plurality of first sublayers and a plurality of second sublayers, wherein the first sublayers and the second sublayers are alternately laminated along a first direction, or The nylon layer comprises a first sublayer and two second sublayers, the first sublayer being located between the two second sublayers. The battery according to claim 1, wherein the first sublayer contains the coloring agent. [Claim 4] When the thickness of the outermost second sub-layer is Y mm along the first direction, the nylon layer satisfies Y = KX + b, Here, 2.6491 ≤ K ≤ 3.13 and -0.1667 ≤ b ≤ -0.0709, The battery according to claim 3, characterized in that X is the mass ratio of the coloring material to the nylon layer. [Claim 5] The battery according to claim 3, characterized in that, when the thickness of the first sub-layer is T1 and the thickness of the second sub-layer is T2 along the first direction, 40%T2 ≤ T1 ≤ 90%T2 is satisfied. [Claim 6] The battery according to claim 1, characterized in that, along the first direction, the thickness of the nylon layer is T, and 12 μm ≤ T ≤ 35 μm. [Claim 7] The battery according to claim 4, characterized in that 0 < X ​​≤ 0.

1. [Claim 8] The battery according to claim 4, characterized in that 0 ≤ Y ≤ 0.

05. [Claim 9] The battery according to claim 4, characterized in that the color difference L value of the nylon layer satisfies L = [-99.68 × ln(X) - 220.36] × Y ​​- 8.36 × ln(X) - 18.

48. [Claim 10] When the thickness of the outermost second sublayer is Y mm along the first direction, the color difference L value of the nylon layer satisfies L = [-99.68 × ln(X) - 220.36] × Y ​​- 8.36 × ln(X) - 18.

48. The battery according to claim 1, characterized in that, here, X is the mass ratio of the coloring material to the nylon layer. [Claim 11] The battery according to claim 1, characterized in that the coloring agent is one or more selected from carbon black, titanium dioxide, cobalt oxide, nickel oxide, and antimony trioxide. [Claim 12] The packaging bag further comprises a metal layer and a sealing layer, The metal layer is located between the sealing layer and the nylon layer. The sealing layer is provided toward the electrode assembly, The battery according to claim 1, characterized in that the nylon layer is located on a surface of the metal layer that is separated from the electrode assembly. [Claim 13] The packaging bag further has a mat layer, The battery according to claim 12, characterized in that the mat layer is provided on the surface of the nylon layer that is separated from the metal layer.

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