Preparation method of high-porosity polyolefin lithium-ion battery diaphragm
A lithium-ion battery, high-porosity technology, applied in battery pack parts, circuits, electrical components, etc., can solve problems such as inability to achieve effects, and achieve the effects of excellent high-temperature thermal shrinkage, easy control of conditions, and simple preparation methods.
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Embodiment example 1
[0032] A method for preparing a high-porosity polyolefin lithium-ion battery diaphragm, comprising casting film preparation-annealing treatment-thermal compounding-stretch setting:
[0033] ①Preparation of cast film: put polypropylene granules into the production extrusion system with extruder temperature of 220°C, runner temperature of 225°C, die temperature of 210°C, cast sheet temperature of 90°C and production speed of 90m / min Extrusion is carried out, and then monolayer cast film is collected;
[0034] ②Annealing treatment: put the prepared single-layer cast film into an annealing device for annealing treatment with an annealing temperature of 110°C and annealing time of 12 hours;
[0035] ③ Thermal lamination: superimpose the single-layer cast film after annealing treatment, so that the cast film with two superimposed layers is put into the lamination device for thermal lamination treatment at a lamination temperature of 80°C to obtain a lamination film;
[0036] ④ Stre...
Embodiment example 2
[0038] A method for preparing a high-porosity polyolefin lithium-ion battery diaphragm, comprising casting film preparation-annealing treatment-thermal compounding-stretch setting:
[0039] ①Preparation of cast film: put polypropylene granules into the production extrusion system with extruder temperature of 230°C, runner temperature of 225°C, die temperature of 210°C, cast sheet temperature of 100°C and production speed of 90m / min Extrusion is carried out, and then monolayer cast film is collected;
[0040] ②Annealing treatment: Put the prepared single-layer cast film into an annealing device for annealing treatment with an annealing temperature of 120°C and annealing time of 18 hours;
[0041] ③ Thermal lamination: superimpose the single-layer cast film after annealing treatment, so that the cast film with two superimposed layers is put into the lamination device for thermal lamination treatment at a lamination temperature of 80°C to obtain a lamination film;
[0042] ④ Str...
Embodiment example 3
[0044] A method for preparing a high-porosity polyolefin lithium-ion battery diaphragm, comprising casting film preparation-annealing treatment-thermal compounding-stretch setting:
[0045] ①Preparation of cast film: put polypropylene pellets into the production extrusion system with extruder temperature of 225°C, runner temperature of 225°C, die head temperature of 210°C, cast sheet temperature of 95°C and production speed of 90m / min Extrusion is carried out, and then monolayer cast film is collected;
[0046] ②Annealing treatment: Put the prepared single-layer cast film into an annealing device for annealing treatment with an annealing temperature of 115°C and annealing time of 15h;
[0047] ③ Thermal lamination: superimpose the single-layer cast film after annealing treatment, so that the cast film with two superimposed layers is put into the lamination device for thermal lamination treatment at a lamination temperature of 80°C to obtain a lamination film;
[0048] ④ Stret...
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