Multi-layer structure flexible battery, manufacturing method and electric equipment thereof

Abstract

The invention discloses a multi-layer structure flexible battery, a manufacturing method and electric equipment thereof. The multi-layer structure flexible battery comprises a stacking structure formed by stacking a soft polymer layer and a battery unit, wherein the battery unit comprises a positive current collector layer, a positive material layer, a diaphragm, a negative current collector layer and a negative material layer; the diaphragm is arranged between the positive electrode material layers and the negative electrode material layers, and the positive electrode material layers or the negative electrode material layers are distributed at intervals along the horizontal direction; therefore, on one hand, in the repeated bending process of the battery, the internal stress of the battery can be effectively released through the soft polymer layer, and the stress in the positive electrode material layer, the negative electrode material layer, the negative electrode current collector layer and the positive electrode current collector layer is reduced, so that the whole battery has flexibility; on the other hand, the positive electrode material layers and the negative electrode material layers are distributed at intervals along the horizontal direction, so that the interface stress between the positive and negative electrode material layers and the positive and negative electrode current collector layers can be reduced to inhibit stripping.

Description

technical field [0001] The invention relates to the technical field of energy storage devices, in particular to a flexible battery with a multi-layer structure, a manufacturing method and electrical equipment thereof. Background technique [0002] With the rapid development of mobile devices and wearable devices, these devices put forward higher requirements for the flexibility of the batteries they use. [0003] In the existing flexible lithium-ion battery system, when the battery is used in special scenarios such as bending, the pole piece is prone to the phenomenon that the active material film layer falls off the current collector in the bending area, especially when the thickness of the battery is greater than 300um, bending As a result, the internal stress of the pole piece is relatively large, which in turn affects the charging and discharging function of the battery. Therefore, to fundamentally realize the construction of the flexible electrode, higher requirements a...

AI Technical Summary

Problems solved by technology

[0003] In the existing flexible lithium-ion battery system, when the battery is used in a special scene such as bending, the active material film layer in the bending area is prone to fall off from the current collector, especially when the battery thickness is greater than 300um, bending The internal stress of the pole piece is large, which affects the charging and discharging function of the battery. Therefore, in order to fundamentally realize the construction of flexible electrodes, higher requirements are put forward for the structure of flexible batteries.

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