A battery cell structure and preparation method of a high-safety lithium-ion battery
A high-safety, lithium battery technology, applied in battery electrodes, electrolyte battery manufacturing, structural parts, etc., can solve the problems of direct contact between positive and negative electrodes, easy to pierce diaphragm, battery short circuit, etc., to reduce use, simplify processes, The effect of reducing production and recycling costs
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Embodiment 1
[0032] Such as Figure 1 to Figure 3 As shown, a battery cell structure of a high-safety lithium battery includes a battery case 2 and an insulating gasket 5. The battery case 2 is provided with four porous diaphragm sleeves 4, and the porous diaphragm sleeve 4 is A columnar electrode 3 and a spiral electrode lead 6 are provided. The columnar electrode 3 is formed by pressing powdered electrode materials. The lead wire of the spiral electrode 6 is fixedly connected to the columnar electrode 3. The battery case 2 is located outside the porous diaphragm sleeve 4. A briquette-shaped electrode 1 is provided, and the briquette-shaped electrode 1 is formed by pressing powdery electrode materials, and is provided with the same number of through holes as the porous diaphragm sleeve 4, and each through hole is correspondingly embedded with a porous diaphragm sleeve 4. The columnar electrode 3 and the briquette electrode 1 can be arbitrarily positive and negative for each other. The out...
Embodiment 2
[0040] Such as figure 1 , figure 2 with Image 6 As shown, the difference from Example 1 is that the battery case 2 is provided with 7 porous diaphragm sleeves 4, and the cell preparation method of the high-safety lithium battery includes the following steps:
[0041] (a) The positive electrode is designed as a columnar structure, and the negative electrode is designed as a honeycomb-like structure;
[0042](b) Make columnar electrode 3: Mix nickel-cobalt-manganese NCM523 ternary positive electrode material, conductive carbon and PVDF binder in a ratio of 8:1:1, and then mix the mixture and the electrode lead 6 of the spiral stainless steel wire in the mold Pressed into a columnar electrode, the helical radius of the helical stainless steel wire is 1.2mm, the pitch is 0.8mm, the height of the helical part inserted into the active material is 67mm, the height of the exposed straight part is 10mm, the diameter of the electrode is 3mm, and the height is 68mm , The compacted d...
Embodiment 3
[0046] Such as Figure 1 to Figure 3 As shown, the difference from Example 1 is that the cell preparation method of the high-safety lithium battery comprises the following steps:
[0047] (a) The positive electrode is designed as a columnar structure, and the negative electrode is designed as a honeycomb-like structure;
[0048] (b) Make columnar electrode 3: mix the lithium iron phosphate positive electrode material, conductive carbon and PVDF binder according to the ratio of 9:0.5:0.5, put it into the mold, insert the electrode lead of the spiral aluminum wire, and apply a certain pressure Pressed into a columnar electrode, the helical radius of the helical aluminum wire is 2.2mm, the pitch is 0.9mm, the height of the helical part inserted into the active material is 62mm, the height of the exposed linear part is 10mm, the diameter of the electrode is 5mm, and the height is 63mm , The compacted density is 2.3g cm -3 , and then put the columnar electrode into a porous PVDF ...
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Abstract
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