Lithium supplement method and system of pole plate

A pole piece and lithium supplementation technology, applied in electrode manufacturing, battery electrodes, electrode rolling/calendering, etc., can solve the problems of easily broken strips, difficult continuous production, low strength, etc., to enhance strength, avoid tearing or pinch off effect

Active Publication Date: 2016-04-13
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology

[0003] In the related technology, because the battery-grade lithium sheet is very thin and has low ...

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  • Lithium supplement method and system of pole plate
  • Lithium supplement method and system of pole plate
  • Lithium supplement method and system of pole plate

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Embodiment Construction

[0063] The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings. "Front", "back", "left", "right", "upper" and "lower" mentioned in the text are all based on the placement state of the pole piece lithium supplement system in the attached drawing.

[0064] Such as figure 1 As shown, the embodiment of the present application provides a pole piece lithium replenishment system, including a first composite lithium belt conveying device 10, a second composite lithium belt conveying device 10', a pole piece unwinding device 11, a pole piece lithium supplementary roller press Device 12, first pole piece peeling device 13, second pole piece stripping device 13', first base material winding device 14, third base material winding device 14', appearance inspection device 15, bad product labeling device 16 , a pole piece winding cooling device 17, a lithium-supplemented pole piece winding device 18, an...

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Abstract

The application relates to the technical field of production of a lithium ion battery, in particular to a lithium supplement method and system of a pole plate. The method comprises the following steps of combining a first substrate and a first lithium strip to form a first composite lithium strip, forming separation between the first lithium strip and a composite device by using a second substrate; combining the first composite lithium strip and a pole plate to be lithium-supplemented to form a lithium-supplement composite pole plate, wherein the first substrate is arranged at one side far away from the pole plate to be lithium-supplemented; and stripping and winding the first substrate to form the lithium-supplemented pole plate. The device comprises a pole plate unwinding device, a first composite lithium strip transmission device, a pole plate lithium supplement rolling device, a first pole plate stripping device and a first substrate winding device, wherein the pole plate lithium supplement rolling device comprises two press rollers arranged in opposite. The lithium supplement method and system of the pole plate, provided by the application, adopt the substrates, on one hand, the strength of the lithium strip is enhanced, on the other end, separation is formed between the lithium strip and the composite device, and thus, the lithium strip is prevented from being broken by pulling or clamping.

Description

technical field [0001] The present application relates to the technical field of lithium-ion battery production, in particular to a method and system for supplementing lithium with pole pieces. Background technique [0002] During the first charging process of the battery, part of the lithium will be consumed due to the formation of the solid electrolyte film (SEI film), which will cause the loss of lithium in the positive electrode material, thereby reducing the capacity of the battery and resulting in a decrease in the first efficiency. This is particularly evident in the negative electrode sheet with alloy materials (such as silicon alloy and tin alloy, etc.) as the active material. In addition, during the cycle of lithium-ion batteries, the SEI film is consumed and repaired, and the increase in dead lithium inside the positive and negative electrodes makes the capacity of the battery continue to decline, resulting in a decrease in the cycle life of the battery. In order...

Claims

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Application Information

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IPC IPC(8): H01M4/1395H01M4/04
CPCH01M4/0435H01M4/1395H01M4/134H01M4/382Y02E60/10Y02P70/50H01M10/0525
Inventor 李克强吴祖钰张五堂
Owner CONTEMPORARY AMPEREX TECH CO
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