Heat insulation sleeve for battery and preparation method thereof
A heat insulation sleeve and battery technology, which is applied in the direction of battery box/jacket, battery box/cover material, secondary battery, etc., can solve the problems of limited heat insulation effect, volume energy density influence, increased weight, etc., and achieve excellent heat insulation Great effect on thermal performance and market application prospect
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[0032] The preparation method of the thermal insulation sleeve for a battery of the present application includes the following steps:
[0033] (1) Mix the aerogel powder with the water-based binder;
[0034] (2) Immerse the mixture of step (1) on the fiber layer or foam layer and dry it;
[0035] (3) Spray PTFE on the outside of the fiber layer for hydrophobic treatment.
Example Embodiment
[0036] Example 1:
[0037] Such as figure 1 As shown, (1) SiO 2 The aerogel powder and acrylic adhesive are mixed in a weight ratio of 6:4; (2) the mixture of step (1) is soaked on polyester fiber with a thickness of 100 microns (um) and dried; (3) on the fiber layer Spraying on the outside: Polytetrafluoroethylene (PTFE) for hydrophobic treatment; (4) Three-layer insulation sleeve is made into a pipe with a circular cross-section, with a flat diameter of 55 mm (mm); the insulation sleeve is covered with phosphoric acid with a diameter of 32 mm and a height of 140 mm. Lithium iron cylindrical battery, such as Figure 2-3 Shown. When the fully charged single battery is short-circuited, the temperature of the surface of the heat insulation sleeve is tested, and the maximum is 50 degrees Celsius (°C).
Example Embodiment
[0038] Example 2:
[0039] Such as figure 1 As shown, (1) SiO 2 The aerogel powder and the polyester adhesive are mixed at a weight ratio of 6:4; (2) the mixture of step (1) is soaked on the phenolic foam layer with a thickness of 100um and dried; (3) on the outside of the fiber layer Spray PTFE for hydrophobic treatment; (4) The three-layer heat insulation sleeve is made into a pipe with a circular cross-section with a flat diameter of 55mm; the heat insulation sleeve is placed on a cylindrical lithium iron phosphate battery with a diameter of 32mm and a height of 140mm, such as Figure 2-3 Shown. When the fully charged single battery is short-circuited, the temperature of the surface of the thermal insulation sleeve is tested, and the maximum is 53°C.
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