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Composite substrate, method for preparing composite substrate, battery and electric vehicle

A technology for composite substrates and electric vehicles, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve problems such as the inability to directly use metal current collectors, and achieve avoidance of electronic conduction failure, high production efficiency, The effect of simple production process

Active Publication Date: 2022-03-22
兰钧新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, due to the limitation of the processing capacity of the metal foil and the manufacturing capacity of the pole piece manufacturing process, it is impossible to directly use ultra-thin metal current collectors.

Method used

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  • Composite substrate, method for preparing composite substrate, battery and electric vehicle
  • Composite substrate, method for preparing composite substrate, battery and electric vehicle
  • Composite substrate, method for preparing composite substrate, battery and electric vehicle

Examples

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no. 1 example

[0041] Please refer to Figure 1 to Figure 4 , this embodiment provides a composite base material 100, which can be used to prepare positive and negative pole pieces of a battery, so as to increase the weight energy density of the battery and improve the conductive contact performance between the metal layer and the active material coating of the pole piece. Further improve the safety performance of lithium-ion batteries. Moreover, the composite base material 100 is easy to weld and has strong adhesive force, which is beneficial to prevent the problem of the metal layer falling off during the cycle of the battery using the composite current collector.

[0042]In this embodiment, the composite substrate 100 includes an insulating base 110, a first metal layer 120, and a second metal layer 130, and the insulating base 110 includes a first surface (not marked in the figure) and a second surface (not marked in the figure) that are oppositely arranged. , the first metal layer 120 ...

no. 2 example

[0050] Please refer to Figure 5 , the embodiment of the present invention provides a method for preparing a composite substrate 100, which is used to prepare the above-mentioned composite substrate 100. The method for preparing the composite substrate 100 includes:

[0051] S100 : providing an insulating substrate 110 , a first metal layer 120 and a second metal layer 130 . A first metal layer 120 and a second metal layer 130 are disposed on opposite first and second surfaces of the insulating substrate 110, respectively. Wherein, the widths of the first metal layer 120 and the second metal layer 130 are respectively greater than the width of the insulating base 110, and the part of the first metal layer 120 exceeding the width of the insulating base 110 is bonded with the part of the second metal layer 130 exceeding the width of the insulating base 110 And electrically conductive. The area of ​​the first metal layer 120 and the second metal layer 130 corresponding to the i...

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Abstract

Embodiments of the present invention provide a composite substrate, a method for preparing the composite substrate, a battery and an electric vehicle, and relate to the technical field of lithium battery manufacturing. The composite base material includes an insulating base, the insulating base includes a first surface and a second surface oppositely arranged, the first surface is provided with a first metal layer, and the second surface is provided with a second metal layer; the first metal layer and the second metal layer The widths of the layers are respectively larger than the width of the insulating base, and the part of the first metal layer exceeding the width of the insulating base is bonded to and electrically connected with the part of the second metal layer exceeding the width of the insulating base; the first metal layer is away from the side of the insulating base, And the area opposite to the insulating base is provided with a conductive coating, the side of the second metal layer away from the insulating base is provided, and the area opposite to the insulating base is provided with a conductive coating. The composite base material is beneficial to increase the gravimetric energy density of the lithium-ion battery, and improve the conductive contact performance between the metal layer and the pole piece active material coating.

Description

technical field [0001] The invention relates to the technical field of lithium battery manufacturing, in particular to a composite substrate, a method for preparing the composite substrate, a battery and an electric vehicle. Background technique [0002] The positive and negative electrodes of the current lithium-ion secondary battery are made by coating the electrode material on the surface of the metal current collector (copper foil or aluminum foil). The metal current collector is expensive and dense, and occupies a large proportion of the weight of the pole piece. , thereby reducing the weight energy density of the battery and affecting the cruising range of electric vehicles. [0003] In theory, lithium-ion secondary batteries only need a very thin layer of metal conductive layer to meet the conduction requirements in the working process. However, on the one hand, it is impossible to directly use ultra-thin metal current collectors due to the limitation of the processi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/134H01M4/1395H01M10/0525
CPCH01M4/667H01M4/134H01M4/1395H01M10/0525Y02E60/10
Inventor 江德顺
Owner 兰钧新能源科技有限公司
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