Composite base material, preparation method of composite base material, battery and electric vehicle

A composite substrate, electric vehicle technology, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve problems such as inability to directly use metal current collectors

Active Publication Date: 2021-02-23
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 base material, preparation method of composite base material, battery and electric vehicle
  • Composite base material, preparation method of composite base material, battery and electric vehicle
  • Composite base material, preparation method of composite base material, battery and electric vehicle

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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

The embodiment of the invention provides a composite base material, a preparation method of the composite base material, a battery and an electric vehicle, and relates to the technical field of lithium battery manufacturing. The composite base material comprises an insulating substrate, the insulating substrate comprises a first surface and a second surface which are oppositely arranged, the firstsurface is provided with a first metal layer, and the second surface is provided with a second metal layer; wherein the widths of the first metal layer and the second metal layer are respectively greater than the width of the insulating substrate, and the part of the first metal layer exceeding the width of the insulating substrate and the part of the second metal layer exceeding the width of theinsulating substrate are bonded and electrically conducted; a conductive coating is arranged on the side, away from the insulating substrate, of the first metal layer and located in the area oppositeto the insulating substrate, and a conductive coating is arranged on the side, away from the insulating substrate, of the second metal layer and located in the area opposite to the insulating substrate. The composite base material is beneficial to improving the weight energy density of the lithium ion battery and improving the conductive contact performance between the metal layers and the pole piece active substance coatings.

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 Applications(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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