Electrochemical battery and preparation method thereof

An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve the problems of being easily damaged, the performance of flexible batteries is deteriorated, etc., and achieve the effects of reducing processing area, improving energy density, and reducing side effects

Inactive Publication Date: 2016-03-09
GUANGDONG ZHUGUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the bending process of flexible batteries, the interface inside the battery cell is often its weak link and is easily damaged, which makes the performance of the flexible battery worse; therefore, reducing the number of internal interfaces of the flexible battery as much as possible is a reliable way to improve the performance of the flexible battery. method

Method used

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  • Electrochemical battery and preparation method thereof
  • Electrochemical battery and preparation method thereof
  • Electrochemical battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 It is a schematic diagram of the cross-sectional structure of the electrochemical cell corresponding to this embodiment. It can be seen from the figure that the negative electrode coating 02 is coated on one surface of the negative electrode current collector 01A as the packaging material, and then combined with the separator 03 and the double-sided coated Positive electrode sheet 04 lamination results in a total of four layers of electrodes (two negative electrodes, two positive electrodes, one of the two negative electrodes is coated on one side, one is coated on both sides, and one of the two positive electrodes is coated on one side , one piece is double-sided coating), the positive electrode sheet is welded together with the current collector 05A through the current collector cutting tab 05B, and the current collector 01A, 05A is the water-proof layer in the packaging structure, which consists of a three-layer structure (including two The sealing layer of ...

Embodiment 2

[0050] The difference from Example 1 is that it includes the following steps:

[0051]Auxiliary treatment of negative current collector encapsulation: Put the chromium solution in the electroplating tank, spread the copper foil with a thickness of 30 μm on the surface of the electroplating tank, and perform electroplating to obtain a chromium-containing encapsulation auxiliary treatment layer with a thickness of 10 nm, and then use deionized water Cleaning to obtain the negative electrode current collector after packaging auxiliary treatment for use;

[0052] Negative electrode preparation as a packaging structure: apply the above-mentioned negative electrode slurry on the negative electrode current collector after the above-mentioned packaging auxiliary treatment to obtain a single-sided coated electrode sheet, and then wash off the coating corresponding to the sealing area with deionized water, After slitting, the negative electrode electrode coated on one side of the monoli...

Embodiment 3

[0057] The difference from Example 1 is that it includes the following steps:

[0058] Auxiliary treatment of negative electrode current collector encapsulation: place the chromium solution in the electroplating tank with a fixed structure (the electroplating tank is a "cross" cross tank, of which only the "cross" line is the chrome solution containing tank, and the groove width matches the seal width ( equal to the width of the seal)), and then flatten the copper foil with a thickness of 10 μm on the surface of the electroplating tank for electroplating to obtain a chromium-containing packaging auxiliary treatment layer with a thickness of 10 nm. The chromium-containing packaging auxiliary treatment layer divides the current collector into multiple untreated The processed current collector block is then cleaned with deionized water to obtain the negative electrode current collector after packaging auxiliary treatment for use;

[0059] Auxiliary treatment of positive current c...

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Abstract

The invention belongs to the technical field of flexible devices, and particularly relates to an electrochemical battery. The electrochemical battery comprises positive electrodes, an isolating membrane, negative electrodes, an electrolyte and an outer package structure, wherein the sum n of the number of the positive electrodes and the number of the negative electrodes is an even number; the outer package structure at least comprises a positive current collector a or/and a negative current collector b; and the outer package structure is a positive tab and a negative tab of a battery core respectively. The electrode current collectors at the outmost layer demonstrate the functions of the package material of the battery and the battery tabs; the variety and the comsumption of materials are reduced; the material cost is reduced; meanwhile the energy density of the battery is improved; and in the preparation process, only the current collectors on the seal edge are subjected to packaging assistant treatment, so that the problems of the package reliability can be solved; the treatment cost can be reduced (the consumption of an expensive treating fluid is reduced); and finally the side effect of an electrode impedance increase caused by the packaging assistant treatment can also be reduced.

Description

technical field [0001] The invention belongs to the technical field of electrochemical batteries, in particular to an electrochemical battery and a preparation method thereof. Background technique [0002] After entering the 21st century, various electronic device products such as mobile phones, notebooks, wearable devices, etc. emerge in an endless stream, which greatly enriches the lives of the majority of users; at the same time, electric vehicles and various energy storage power stations are also rapidly sprouting, developing, and grow. The above high-tech products have a common feature: high-performance, low-cost batteries are required to act as energy storage components. [0003] Existing batteries mainly include primary batteries and secondary batteries; the so-called primary batteries, that is, batteries that cannot be recharged, mainly include carbon-zinc batteries, alkaline batteries, paste-type zinc-manganese batteries, cardboard zinc-manganese batteries, alkalin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M4/04H01M4/66H01M4/70H01M50/10
CPCH01M4/04H01M4/66H01M4/661H01M4/70H01M50/124Y02E60/10
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH
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