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Preparation technology applied to produce soft-shell lithium battery

A lithium battery and process technology, applied in the manufacture of electrolyte batteries, battery electrodes, and final product manufacturing, etc., can solve problems such as safety accidents and leakage, and achieve stable conduction and power storage functions, good power storage energy, and increase power storage capacity. Effect

Inactive Publication Date: 2015-04-08
GUANGAN DINGHENG NEW ENERGY LITHIUM BATTERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although certain sealing measures are adopted between the polar end of the existing lithium battery and the shell, there are still dangerous phenomena such as leakage due to temperature rise during use, and unpredictable safety hazards occur, resulting in safety accidents.

Method used

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  • Preparation technology applied to produce soft-shell lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A manufacturing process applied to the production of soft shell lithium batteries, comprising the following steps:

[0069] Step 1. Preparation of positive and negative electrode formula materials: prepare materials for the positive electrode formula and the negative electrode formula, wherein the materials of the positive electrode formula are mainly: lithium ion source, positive conductive agent, binder and positive electrode current collector; the materials of the negative electrode formula Mainly: graphite, negative conductive agent, thickener, binder and negative current collector;

[0070] Step 2, positive and negative electrode mixing and pulping, including the following steps:

[0071] Step 2.1, positive electrode mixing and pulping;

[0072] Step 2.2, negative electrode mixing and pulping;

[0073] Step 2.1 includes the following steps:

[0074] Step 2.1.1, positive electrode ingredient pretreatment;

[0075] Step 2.1.2, positive electrode ingredient ball m...

Embodiment 2

[0085] This embodiment is further optimized on the basis of the above-mentioned embodiments. Further, in order to better realize the present invention, in the step 1, the material of the positive electrode formulation also includes a dissolving agent and is calculated by material parts as: lithium ion source 9300-9500 parts, 350-450 parts of positive conductive agent, 200-300 parts of binder, 15-25 parts of dissolving agent, positive current collector; negative electrode formula is calculated according to the number of parts: graphite 9400-9600 parts, negative conductive agent 90-120 parts, 200-240 parts of thickener, 200-240 parts of binder, negative electrode current collector; when formulating, adding a solvent to the positive electrode ingredients can make the ingredients mix more uniformly, so that the positive electrode made The energy density of the chip is higher, and the storage energy is better and more stable.

Embodiment 3

[0087] This embodiment is further optimized on the basis of the foregoing embodiments, and the step 2.1.1 includes the following steps:

[0088] Step 2.1.1.1, the lithium ion source is dehydrated by baking at 120°C under normal pressure for 2±0.25 hours;

[0089] Step 2.1.1.2, the positive conductive agent is dehydrated by baking at 200°C under normal pressure for 2±0.25 hours;

[0090] Step 2.1.1.3, the adhesive is dehydrated by baking at 120-140°C under normal pressure for 2±0.25 hours;

[0091] In the step 2.1.2: the lithium ion source and the positive conductive agent are poured into the barrel, and the grinding balls are added at the same time. The ratio of the total weight of the lithium ion source and the positive conductive agent to the grinding balls is 1:1, and the process is carried out on the roller bottle machine For ball milling, the speed is controlled above 60rmp, and it ends after 4 hours, and the balls are separated by sieving;

[0092] Said step 2.1.3 comp...

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Abstract

The invention discloses a preparation technology applied to produce a soft-shell lithium battery. The preparation method comprises: 1) preparing cathode and anode formula materials; 2) performing material mixing and slurry dragging for cathode and anode, concretely, a) performing cathode material mixing and slurry dragging, and b) performing anode material mixing and slurry dragging, further concretely, in the a), performing pretreatment on cathode ingredients, performing ball milling on the cathode ingredients, preparing a slurry from the cathode ingredients, and performing slurry dragging operation on the cathode ingredients, and in the b), performing pretreatment on anode ingredients, performing ball milling on anode ingredients, preparing a slurry from anode ingredients, and performing slurry dragging operation on anode ingredients; preparing the battery, concretely, preparing a cathode sheet from the cathode ingredients subjected to slurry dragging, preparing an anode sheet from the anode ingredients, overlaying the cathode sheet and the anode sheet according to the internal structure of the lithium battery, and then performing packaging by utilizing an aluminium-plastic membrane or an aluminium-plastic composite membrane as a shell, and then winding an electric-leakage protective layer around the polar ends and the shell of the lithium battery. The lithium battery manufactured by employing the new technological process is capable of effectively avoiding electric leakage phenomenon caused by heating, thereby avoiding similar accidents during usage, and the whole technological process is scientific, reasonable and high in handleability, and can be easily implanted into industrial assembly line operation.

Description

technical field [0001] The invention relates to the technical field of lithium battery production, in particular to a manufacturing process applied to the production of soft-shell lithium batteries. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. According to the different electrolyte materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries (Liquified Lithium-Ion Battery, referred to as LIB) and polymer lithium-ion batteries (Polymer Lithium-Ion Battery, referred to as PLB) or plastic lithium batteries. Ion batteries (Plastic Lithium Ion Batteries, referred to as PLB). The positive and negative electrode materials used in polymer lithium-ion batteries are the same as liquid lithium ions. The positive electrode materials are divided into lithium cobaltate, lithium manganese oxide, terna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/139H01M4/62
CPCH01M4/139H01M4/62H01M10/058Y02E60/10Y02P70/50
Inventor 黄河清李昌辉
Owner GUANGAN DINGHENG NEW ENERGY LITHIUM BATTERY MFG
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