CN113698910A - Low-specific-gravity deflagration-proof pouring sealant for new energy battery and preparation method thereof - Google Patents
Low-specific-gravity deflagration-proof pouring sealant for new energy battery and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention discloses a low-specific-gravity deflagration-proof pouring sealant for a new energy battery and a preparation method thereof, wherein the pouring sealant comprises a component A and a component B, wherein the component A comprises 30-40 parts of vinyl silicone resin, 30-40 parts of composite powder, 0.6-2 parts of powder modifier, 20-30 parts of halogen-free flame retardant and 0.5-1 part of platinum catalyst; the component B comprises: 30-40 parts of vinyl silicone resin, 30-35 parts of special composite powder, 20-30 parts of halogen-free flame retardant, 0.6-2 parts of powder modifier, 3-5 parts of cross-linking agent, 1-2 parts of toughening agent and 0.03-0.05 part of inhibitor; the special composite powder is prepared by mixing several special functional powders, and the colloid has excellent heat insulation property and flame retardance; the halogen-free flame retardant is one of aluminum hydroxide and magnesium hydroxide, and can effectively improve the flame retardance of the system. The pouring sealant has the advantages of low specific gravity, flame retardance, good waterproof performance, excellent heat insulation, good shock resistance and shock absorption and the like by improving the traditional preparation process; and can effectively prevent the thermal runaway of battery module, furthest's assurance battery PACK module's energy density ratio simultaneously.
Description
Technical Field
The invention belongs to the technical field of organic silicon rubber materials, and particularly relates to a low-specific-gravity deflagration-proof pouring sealant for a new energy battery PACK and a preparation method thereof.
Background
The organic silicon pouring sealant has excellent electrical insulation performance, high and low temperature resistance, weather resistance, excellent heat dissipation, buffering, shock absorption, explosion prevention, flame retardance and other outstanding performances, and is widely applied and developed in industries of electronic appliances, power supplies, new energy batteries and the like in recent years.
In recent years, with the world's energy crisis and environmental issues becoming more prominent, the traditional fuel automobile industry has faced significant challenges. According to the overall requirements of changing an economic growth mode and implementing a low-carbon economic policy in China, the new energy automobile is rapidly developed by the aid of factors such as government subsidies, environmental friendliness, low noise, low travel cost and the like. As new energy vehicles gradually move into the daily lives of thousands of households, the safety of the new energy vehicles is concerned by consumers. The biggest risk of the electric automobile is the safety of the battery, and the safety of the new energy battery PACK is mainly regulated, protected and controlled by a BMS (battery management system). When the load of the battery cell is too large, the battery is overcharged, the circuit is short-circuited and the like, the cell is overheated to generate thermal runaway and cause thermal spreading, so that the whole battery PACK group is ignited or even exploded, and the safety of the battery PACK directly influences the safety of the whole vehicle. Traditional battery sealant mainly depends on heat conduction to dissipate heat generated by a battery cell in the charging and discharging process of a battery pack, so that the heat balance effect of a battery module is achieved. However, with the continuous increase of the energy density of the battery, the heat released in the charging and discharging processes of the battery pack is also continuously increased, and only by means of heat conduction, the thermal runaway and the domino effect caused by thermal spread cannot be effectively avoided, so that the runaway influence is enlarged, and finally serious accidents are caused.
Disclosure of Invention
The following presents a simplified summary of embodiments of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that the following summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
The technical problem to be solved by the invention is as follows: the PACK low-specific-gravity deflagration-proof pouring sealant for the new energy battery, which overcomes the defects in the prior art, has excellent waterproofness, shock resistance and shock absorption, heat insulation and low specific gravity, and can maintain the energy density ratio to the maximum extent on the premise of ensuring safety.
According to one aspect of the application, the low specific gravity deflagration-proof pouring sealant for the new energy battery comprises a component A and a component B, wherein the component A and the component B are mixed in a mass ratio of 1:1, and the component A comprises the following materials in parts by mass:
the component B comprises the following materials in parts by weight:
the structural formula of the vinyl silicone resin is ViMe2SiO(Me2SiO)m(MeViSiO)nSiMe2Vi, m-50-150, n-4-12, and low molecular siloxane (D) of this type3-10) The content is low, and the influence on the electrical property of the component is reduced during operation.
The special composite powder consists of several special functional powders, and the particle size of the powder is preferably 10-50 μm. The special composite powder material may be hollow glass microsphere, hollow ceramic microsphere, hollow alumina microsphere and paraffin. Preferably, the special composite powder comprises hollow glass microspheres, hollow ceramic microspheres, hollow alumina microspheres and paraffin, wherein the mass parts of the materials are as follows: the mass fraction of the hollow glass microspheres is 0-60%, the mass fraction of the hollow ceramic microspheres is 0-60%, the mass fraction of the hollow alumina microspheres is 0-60%, and the mass fraction of the paraffin wax is 20-70%. The preparation process comprises the following steps: the composite powder has excellent heat insulation and flame retardance, can effectively prevent thermal spread caused by thermal runaway of a battery cell, and greatly improves the deflagration-proof performance of colloid. The special treating agent is one or a combination of vinyl siloxane, silazane and alkyl siloxane.
The inorganic flame retardant is aluminum hydroxide and/or magnesium hydroxide, and the particle size is controlled to be 10-50 mu m.
The platinum catalyst is a self-made platinum catalyst, which is a 2000-3000PPM platinum-series catalyst synthesized by coordination of 1, 3-divinyl tetramethyl disiloxane and platinum. Has the advantages of high compatibility, stable catalytic activity and the like.
The cross-linking agent is an organic siloxane oligomer with more than 3 Si-H bonds, the viscosity is 50-100mpa · s, the hydrogen content is 0.1-0.36%, the gel hardness and elasticity are adjusted, the shock resistance and shock absorption performance are improved, the stress generated by impact and shock can be eliminated, and product parts are protected better.
The toughening agent is a special linear organic siloxane oligomer with the general structural formula of HMe2SiO(Me2SiO)a(MeHSiO)bSiMe2H and HMe2SiO(Me2SiO)nSiMe2H, one or two of the components are combined. Wherein, a is 25-40, b is 2-8, and c is 15-28. The method can effectively improve the proportion of the D chain link, increase the molar mass in the polymer and enhance the strength of the rubber.
According to another aspect of the application, a preparation method of the low-specific-gravity deflagration-proof pouring sealant for the new energy battery is provided, and comprises the following steps:
step 1: preparation of component A: firstly, after the vinyl silicone resin and the halogen-free flame retardant are fully stirred in a kneading machine, the temperature is raised to 100 ℃, the special composite powder is added in 2-3 times, and the powder and the silicone resin are fully and uniformly mixed when being added each time, and then the next addition is carried out. Spraying modifier in batches, heating to 130 deg.c and vacuumizing for 3 hr. Cooling to 80 deg.C, adding catalyst, vacuumizing to-0.08 Mpa, stirring for 25-35Min, discharging, and bottling;
step 2: preparation of the component B: firstly, fully stirring vinyl silicone resin, a cross-linking agent, a toughening agent and a halogen-free flame retardant in a kneading machine, heating to 100 ℃, adding special composite powder for 2-3 times, and fully mixing the powder with the silicone resin during each addition, and then adding the powder for the next time. Spraying modifier in batches, heating to 130 deg.c and vacuumizing for 3 hr. Cooling to 80 deg.C, adding inhibitor, vacuumizing to-0.08 Mpa, stirring for 25-35Min, discharging, and bottling.
Compared with the prior art, the invention has the following beneficial effects: the invention adopts the special composite powder which is independently innovated, introduces the halogen-free flame retardant, and the prepared colloid is different from the traditional battery PACK organic silicon pouring sealant, has excellent waterproofness, shock resistance and shock absorption, excellent heat insulation and lower specific gravity, and ensures the energy density of a PACK module system to the maximum extent on the premise of ensuring safety.
Detailed Description
The invention is further described below in connection with the practice.
Example 1
The component A comprises:
vinyl silicone resin: 30 portions of
Special composite powder: 30 portions of
Halogen-free flame retardant: 20 portions of
Powder modifier: 0.6 part
Platinum catalyst: 0.5 portion
And B component:
vinyl silicone resin: 30 portions of
Special composite powder: 30 portions of
Halogen-free flame retardant: 20 portions of
Powder modifier: 0.6 part
Crosslinking agent (H content 0.36%): 3 portions of
A toughening agent: 1 part of
Inhibitors (alkynes): 0.03 part
Wherein the vinyl silicone resin structure is ViMe2SiO(Me2SiO)60(MeViSiO)4SiMe2Vi; the special composite powder is hollow glass microsphere and hollowMixing the ceramic microspheres, the hollow alumina microspheres and the paraffin wax according to the mass ratio of 1:1:1:3, wherein the particle size is 30 micrometers, and the specific gravity is 0.7; the modifier is dodecyl siloxane; the halogen-free flame retardant is aluminum hydroxide with the particle size of 40 microns; the platinum catalyst was 3000 ppm. The structural formula of the toughening agent is HMe2SiO(Me2SiO)17SiMe2H. The inhibitor is methylbutinol.
The preparation process comprises the following steps:
the component A comprises: firstly, after the vinyl silicone resin and the halogen-free flame retardant are fully stirred in a kneading machine, the temperature is raised to 100 ℃, the special composite powder is added in 2-3 times, and the powder and the silicone resin are fully and uniformly mixed when being added each time, and then the next addition is carried out. Spraying modifier in batches, heating to 130 deg.c and vacuumizing for 3 hr. Cooling to 80 deg.C, adding catalyst, vacuumizing to-0.08 Mpa, stirring for 25-35Min, and packaging to obtain component A.
And B component: firstly, fully stirring vinyl silicone resin, a cross-linking agent, a toughening agent and a halogen-free flame retardant in a kneading machine, heating to 100 ℃, adding special composite powder for 2-3 times, and fully mixing the powder with the silicone resin during each addition, and then adding the powder for the next time. Spraying modifier in batches, heating to 130 deg.c and vacuumizing for 3 hr. Cooling to 80 deg.C, adding inhibitor, vacuumizing to-0.08 Mpa, stirring for 25-35Min, and packaging to obtain component B.
In this embodiment, the hollow glass microspheres, the hollow ceramic microspheres, the hollow alumina microspheres and the paraffin wax of the special composite powder are mixed in a mass ratio of 1:1:1:3, and the preparation process is as follows: the composite powder has excellent heat insulation and flame retardance, can effectively prevent thermal spread caused by thermal runaway of a battery cell, and greatly improves the deflagration-proof performance of colloid.
Example 2
The component A comprises:
vinyl silicone resin: 30 portions of
Special composite powder: 30 portions of
Halogen-free flame retardant: 20 portions of
Powder modifier: 0.6 part
Platinum catalyst: 0.5 portion
And B component:
vinyl silicone resin: 40 portions of
Special composite powder: 40 portions of
Halogen-free flame retardant: 30 portions of
Powder modifier: 2 portions of
Crosslinking agent (H content 0.36%): 2 portions of
A toughening agent: 2 portions of
Inhibitors (alkynes): 0.05 part
Wherein the vinyl silicone resin structure is ViMe2SiO(Me2SiO)80(MeViSiO)8SiMe2Vi; the special composite powder is prepared by mixing hollow glass microspheres, hollow ceramic microspheres, hollow alumina microspheres and paraffin according to the mass ratio of 1:1:1:1.5, wherein the particle size is 40 micrometers, and the specific gravity is 0.6; the modifier is dodecyl siloxane; the halogen-free flame retardant is aluminum hydroxide with the particle size of 30 microns; the platinum catalyst was 3000 ppm. The structural formula of the toughening agent is HMe2SiO(Me2SiO)17SiMe2H. The inhibitor is methylbutinol.
In this embodiment, the hollow glass microspheres, the hollow ceramic microspheres, the hollow alumina microspheres and the paraffin wax of the special composite powder are mixed in a mass ratio of 1:1:1:1.5, and the preparation process is as follows: the composite powder has excellent heat insulation and flame retardance, can effectively prevent thermal spread caused by thermal runaway of a battery cell, and greatly improves the deflagration-proof performance of colloid.
The specific preparation process is the same as that of example 1, and is not described herein again.
Example 3
The component A comprises:
vinyl silicone resin: 40 portions of
Special composite powder: 40 portions of
Halogen-free flame retardant: 30 portions of
Powder modifier: 2 portions of
Platinum catalyst: 1 part of
And B component:
vinyl silicone resin: 30 portions of
Special composite powder: 30 portions of
Halogen-free flame retardant: 20 portions of
Powder modifier: 0.6 part
Crosslinking agent (H content 0.36%): 3 portions of
A toughening agent: 1 part of
Inhibitors (alkynes): 0.03 part
Wherein the vinyl silicone resin structure is ViMe2SiO(Me2SiO)120(MeViSiO)12SiMe2Vi; the special composite powder is prepared by mixing hollow glass microspheres, hollow ceramic microspheres, hollow alumina microspheres and paraffin according to the mass ratio of 1.2:1:1.1:1, wherein the particle size is 40 micrometers, and the specific gravity is 0.6; the modifier is silazane; the halogen-free flame retardant is magnesium hydroxide with the particle size of 30 microns; the platinum catalyst was 3000 ppm. The structural formula of the toughening agent is HMe2SiO(Me2SiO)17SiMe2H. The inhibitor is methylbutinol.
The specific preparation process is the same as that of example 1, and is not described herein again.
Example 4
The component A comprises:
vinyl silicone resin: 40 portions of
Special composite powder: 40 portions of
Halogen-free flame retardant: 30 portions of
Powder modifier: 2 portions of
Platinum catalyst: 1 part of
And B component:
vinyl silicone resin: 40 portions of
Special composite powder: 40 portions of
Halogen-free flame retardant: 30 portions of
Powder modifier: 2 portions of
Crosslinking agent (H content 0.36%): 2 portions of
A toughening agent: 2 portions of
Inhibitors (alkynes): 0.05 part of vinyl silicone resin, wherein the structure of the vinyl silicone resin is ViMe2SiO(Me2SiO)80(MeViSiO)12SiMe2Vi; the special composite powder is prepared by mixing hollow glass microspheres, hollow ceramic microspheres, hollow alumina microspheres and paraffin according to the mass ratio of 1.1:1.5:1:1.2, wherein the particle size is 30 micrometers, and the specific gravity is 0.5; the modifier is silazane; the halogen-free flame retardant is aluminum hydroxide with the particle size of 30 microns; the platinum catalyst was 3000 ppm. The structural formula of the toughening agent is HMe2SiO(Me2SiO)17SiMe2H. The inhibitor is methylbutinol.
The specific preparation process is the same as that of example 1, and is not described herein again.
Compared with the embodiment 1-4, the difference of the traditional new energy battery pouring sealant in the control group 1 is that no special composite powder exists, and the filler is common pouring powder.
The performance test was as follows:
1. and (3) testing the heat conductivity coefficient, namely, mixing the component A and the component B of the pouring sealant according to the weight ratio of 1:1, uniformly mixing, injecting into a grinding tool with the radius of 50mm and the height of 20mm, standing for 24H hours at normal temperature to form a cylindrical block with the radius of 50mm and the thickness of 20mm, and placing into a thermal conductivity tester for testing (transient plane heat source method) according to ASTM D5470 thermal conductivity test standard.
2. And (3) performing flame retardant test, namely mixing the component A and the component B of the pouring sealant according to the proportion of 1:1, mixing uniformly, standing for 24H at normal temperature to obtain a solidified block, and cutting the solidified block into a sample with the length of 130mm +/-5 mm, the width of 13.0mm +/-0.5 and the thickness of 3.0mm +/-0.25 mm. Refer to GB/T10707-.
3. And (3) specific gravity test: referring to the specific gravity test method of GB/T13354-. The results of the above performance tests are shown in table 1 below:
table 1: firstly, carrying out performance test after curing for 24 hours at 25 ℃; ② the lower the heat conductivity coefficient, the higher the thermal resistance, the better the heat insulation.
The experiment result of a control group shows that the low-specific-gravity deflagration-proof pouring sealant for the new energy battery PACK has remarkable flame retardant and heat insulation properties compared with the traditional battery PACK pouring sealant, and the specific gravity of the pouring sealant is far lower than that of the traditional pouring sealant; and the data comparison of the embodiment 1 and the embodiment 2, and the embodiment 3 and the embodiment 4 shows that the special composite powder obviously enhances the heat insulation property of the colloid and greatly reduces the specific gravity of the colloid, and the halogen-free flame retardant has an enhancing effect on the flame retardant effect of the colloid.
The invention provides a PACK organic silicon pouring sealant material of a new energy battery, which is different from the traditional heat-conducting pouring sealant and has good heat-insulating property so as to solve the safety problem of the PACK of the power battery at present, and can ensure that when a single battery cell is out of control, the out-of-control battery cell is isolated, heat is not spread to other battery cells, thus the influence range is reduced, and the occurrence of serious accidents is reduced or eliminated; the good flame retardance can effectively restrain the occurrence of fire or explosion of the battery, and further guarantee the safety and stability of the PACK module; meanwhile, the material has excellent shock resistance and shock absorption, and can eliminate stress generated by impact and shock; excellent waterproof performance; the proportion is low, has guaranteed the energy density of lithium cell with furthest guaranteeing the safety of battery PACK module.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
While the present invention has been disclosed above by the description of specific embodiments thereof, it should be understood that all of the embodiments and examples described above are illustrative and not restrictive. Various modifications, improvements and equivalents of the invention may be devised by those skilled in the art within the spirit and scope of the appended claims. Such modifications, improvements and equivalents are also intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a new energy battery low specific gravity deflagration-proof pouring sealant, includes A component and B component, its characterized in that:
the component A comprises the following materials in parts by weight:
the component B comprises the following materials in parts by weight:
2. the new energy battery low specific gravity deflagration-proof pouring sealant of claim 1, characterized in that: the general structural formula of the vinyl silicone resin is ViMe2SiO(Me2SiO)m(MeViSiO)nSiMe2Vi，m＝50-150，n＝4-12。
3. The new energy battery low specific gravity deflagration-proof pouring sealant of claim 1, characterized in that: the particle size range of the special composite powder is 10-50 mu m, and the special composite powder is selected from one or a combination of several of hollow glass microspheres, hollow ceramic microspheres, hollow alumina microspheres and paraffin.
4. The new energy battery low specific gravity deflagration-proof pouring sealant of claim 3, characterized in that: in the special composite powder, the mass fraction of the hollow glass microspheres is 0-60%, the mass fraction of the hollow ceramic microspheres is 0-60%, the mass fraction of the hollow alumina microspheres is 0-60%, and the mass fraction of the paraffin is 20-70%.
5. The new energy battery low specific gravity deflagration-proof pouring sealant of claim 3, characterized in that: the preparation process of the special composite powder comprises the following steps: firstly, performing primary dispersion, and adding a special treating agent for treatment after uniform dispersion; the special treating agent is selected from one or more of vinyl siloxane, silazane and alkyl siloxane.
6. The new energy battery low specific gravity deflagration-proof pouring sealant of claim 1, characterized in that: the platinum catalyst is a 2000-3000PPM platinum-series catalyst which is synthesized by coordination of 1, 3-divinyl tetramethyl disiloxane and platinum.
7. The new energy battery low specific gravity deflagration-proof pouring sealant of claim 1, characterized in that: the cross-linking agent is organic siloxane oligomer with more than 3 Si-H bonds, the viscosity is 50-100mpa · s, and the hydrogen content is 0.1-0.36%.
8. The new energy battery low specific gravity deflagration-proof pouring sealant of claim 1, characterized in that: the toughening agent is organic siloxane oligomer with the general structural formula of HMe2SiO(Me2SiO)a(MeHSiO)bSiMe2H and/or HMe2SiO(Me2SiO)nSiMe2H; wherein, a is 25-40, b is 2-8, and n is 15-28.
9. The preparation method of the low specific gravity deflagration-proof pouring sealant for the new energy battery as defined in any one of claims 1 to 8, which is characterized by comprising the following steps: the method comprises the following steps:
step 1: preparation of component A: firstly, after fully stirring vinyl silicone resin and a halogen-free flame retardant in a kneading machine, heating to 100 ℃, adding special composite powder for 2-3 times, and fully and uniformly mixing the powder with the silicone resin when adding each time, and then adding the powder for the next time; spraying modifier in batches, heating to 130 ℃, and vacuumizing for 3 h; cooling to 80 deg.C, adding catalyst, vacuumizing to-0.08 Mpa, stirring for 25-35Min, discharging, and bottling;
step 2: preparation of the component B: firstly, fully stirring vinyl silicone resin, a cross-linking agent, a toughening agent and a halogen-free flame retardant in a kneading machine, heating to 100 ℃, adding special composite powder for 2-3 times, and fully and uniformly mixing the powder with the silicone resin during each addition, and then adding the powder for the next time; spraying modifier in batches, heating to 130 ℃, and vacuumizing for 3 h; cooling to 80 deg.C, adding inhibitor, vacuumizing to-0.08 Mpa, stirring for 25-35Min, discharging, and bottling.
10. The use of the low specific gravity deflagration-proof pouring sealant for the new energy battery of any one of claims 1-8 in the new energy battery.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216073A1 (en) * | 2022-05-09 | 2023-11-16 | Dow Silicones Corporation | Organopolysiloxane composition with ceramic microspheres |
| WO2023216074A1 (en) * | 2022-05-09 | 2023-11-16 | Dow Silicones Corporation | Organopolysiloxane foam with ceramic microspheres |
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| CN104357000A (en) * | 2014-10-11 | 2015-02-18 | 航天特种材料及工艺技术研究所 | Thermal insulation joint mixture and laying method thereof |
| CN110462875A (en) * | 2017-02-08 | 2019-11-15 | 埃肯有机硅美国公司 | Secondary battery with improved heat management |
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| WO2023216073A1 (en) * | 2022-05-09 | 2023-11-16 | Dow Silicones Corporation | Organopolysiloxane composition with ceramic microspheres |
| WO2023216074A1 (en) * | 2022-05-09 | 2023-11-16 | Dow Silicones Corporation | Organopolysiloxane foam with ceramic microspheres |
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