Current collector, electrode plate and battery containing the same, and application thereof

A battery, comprising:

• a positive electrode plate;
• a separator;
• and
• a negative electrode plate,
• wherein the positive electrode plate and/or the negative electrode plate is an electrode comprising a current collector and an electrode active material layer formed on a surface of the current collector,
• the current collector, comprising an insulation layer and a conductive layer,
• the insulation layer being configured to bear the conductive layer, the conductive layer being configured to bear the electrode active material layer, and the conductive layer being placed on at least one surface of the insulation layer,
• wherein the conductive layer has the following characteristics:
• a room temperature film resistance RS of 0.08Ω/□≤RS≤8.4Ω/□, and a thickness D2 of 1 nm≤D2≤1 μm, and
• wherein the conductive layer is a single layer made of a material selected from a group consisting of aluminum, copper, titanium, nickel-copper alloy, aluminum-zirconium alloy, and combinations thereof, and
• wherein an internal resistance of the battery is referred to as r, a theoretical capacity of the battery is referred to as Cap, a relation between r and Cap meets a conditional expression:
• 126 Ah·mΩ≤r×Cap≤384 Ah·mΩ, and the theoretical capacity Cap satisfies 3.2 Ah≤Cap≤48 Ah.