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Copper-aluminum integrated current collector electrode, laminated battery and preparation process

A current collector and copper-aluminum technology, which is applied in the fields of copper-aluminum integrated current collector electrode, laminated battery and preparation process, can solve the problems of reducing the volume energy density of the battery, increasing the complexity of the process, and uneven current distribution, and achieving high quality Mitigation, reducing the risk of thermal runaway, the effect of increasing the volumetric energy density

Pending Publication Date: 2020-11-24
姜继成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of battery has the following defects: the single battery using the winding process is likely to cause uneven current distribution due to the curvature of the electrode, and the heat dissipation is poor, which is easy to cause thermal runaway
In addition, the use of laminated batteries with positive and negative electrodes increases the complexity of the process and also reduces the volumetric energy density of the battery.

Method used

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  • Copper-aluminum integrated current collector electrode, laminated battery and preparation process
  • Copper-aluminum integrated current collector electrode, laminated battery and preparation process
  • Copper-aluminum integrated current collector electrode, laminated battery and preparation process

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as Figure 1 to Figure 5 As shown, a copper-aluminum integrated current collector electrode includes: a copper-aluminum current collector 1 , a positive electrode material 2 and a negative electrode material 3 . The copper-aluminum current collector 1 includes bonded copper foil 11 and aluminum foil 12 , one side of the copper foil 11 is coated with the negative electrode material 3 , and one side of the aluminum foil 12 is coated with the positive electrode material 2 . The thicknesses of the copper foil 11 and the aluminum foil 12 are 3 μm and 3 μm, or 4 μm and 2 μm respectively, and the length and width of the cross section of the copper-aluminum current collector 1 are 10 cm×6 cm, 20 cm×40 cm or 30 cm×50 cm. In this embodiment, the thicknesses of the copper foil 11 and the aluminum foil 12 are 3 μm and 3 μm respectively, the thickness of the positive electrode material 2 is 80 μm, and the thickness of the negative electrode material 3 is 127 μm.

[0036] The p...

Embodiment 2

[0039] Such as Image 6 As shown, a copper-aluminum integrated current collector laminated battery includes the copper-aluminum integrated current collector electrode described in Embodiment 1, and also includes a separator and an electrolyte 5, and the current collector electrode 4 is stacked in series to form a stack. A separator and an electrolytic solution 5 are provided between the current collector electrode 4 and the current collector electrode 4 .

[0040] The electrolyte includes electrolyte and solvent. The electrolyte is lithium hexafluorophosphate with a concentration of 0.9mol / L. The solvent includes ethylene carbonate and dimethyl carbonate with a weight ratio of 1:1.5. The separator is a polypropylene monolayer microporous membrane.

Embodiment 3

[0042] A preparation process of a copper-aluminum integrated current collector laminated battery, which is used to prepare a copper-aluminum integrated current collector laminated battery described in Example 2, comprising the following steps:

[0043] 1. Prepare copper-aluminum current collector 1, apply adhesive on the surface of copper foil 11 and aluminum foil 12, and roll to form copper-aluminum current collector 1, or directly heat-press composite copper foil 11 and aluminum foil 12 to form copper-aluminum current collector 1. Or use electroplating to plate copper foil 11 on the surface of aluminum foil 12 or plate aluminum foil 12 on the surface of copper foil 11.

[0044] 2. Coating negative electrode material 3 on one side of copper foil 11 and coating positive electrode material 2 on one side of aluminum foil 12 to make current collector electrode 4 .

[0045] 3. The current collector electrodes 4 are cut and then stacked and combined in series to form a stack. A sep...

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Abstract

The invention discloses a copper-aluminum integrated current collector electrode, a laminated battery and a preparation process, the current collector electrode comprises a copper-aluminum current collector, a positive electrode material and a negative electrode material, the copper-aluminum current collector comprises a copper foil and an aluminum foil which are bonded, one surface of the copperfoil is coated with the negative electrode material, and one surface of the aluminum foil is coated with the positive electrode material; the positive electrode material comprises a single crystal lithium nickel cobalt manganate LiNi < 1-x-y > Co < x > Mn < y > O < 2 > material, and the negative electrode material comprises graphite or a silicon-carbon negative electrode material; the laminated battery comprises the current collector electrode. The preparation process is used for preparing the current collector electrode and the laminated battery. The current collector electrode and the laminated battery provided by the invention are relatively high in mass energy density and volume energy density, the laminated battery has relatively good safety and relatively high power performance, andmeanwhile, the manufacturing process is simplified.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a copper-aluminum integrated current collector electrode, a laminated battery and a preparation process. Background technique [0002] Due to the rapid development of electric vehicles, consumers have also put forward higher requirements for the safety and cruising range of electric vehicles. Therefore, in order to adapt to development, power batteries need to meet the characteristics of high volumetric energy density and high safety. At present, the power lithium-ion batteries used in electric vehicles are inherited and developed from mobile phone batteries or other small equipment batteries. They are generally assembled from single cells to form a battery pack, and then a battery system is formed from multiple battery packs. This kind of battery has the following defects: the single battery using the winding process is likely to cause uneven current distribution due to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/131H01M4/133H01M4/134H01M10/0525H01M10/0585H01M10/613H01M10/625H01M10/647H01M10/654
CPCH01M4/661H01M4/667H01M4/133H01M4/134H01M4/131H01M10/0525H01M10/0585H01M10/613H01M10/625H01M10/647H01M10/654Y02E60/10Y02P70/50
Inventor 姜继成
Owner 姜继成
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