Thermal suppression module, battery pack and electronic equipment

Abstract

The utility model provides a thermal inhibition module, a battery pack and electronic equipment. The thermal inhibition module comprises a composite layer, the composite layer comprises a heat insulation layer, a heat conduction layer and a heat dissipation layer; wherein the heat conduction layers are arranged on the two sides of the heat dissipation layer, and the heat insulation layers are arranged on the two sides, away from the heat dissipation layer, of the heat conduction layers. The heat suppression module provided by the utility model can solve the problems that the thickness of the heat suppression module in the prior art is still large, and the energy density and the heat spreading suppression effect cannot be considered at the same time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrochemistry energy storage technical field, concretely relates to a kind of thermal inhibition module, battery pack and electronic equipment. BACKGROUND

[0002] Lithium-ion battery is dominant because of high energy density, long cycle life and other advantages. With the rapid development of electrochemical energy storage system, its problems are also highlighted quickly.

[0003] The battery cell may trigger thermal runaway in the process of heating, overcharging, overdischarging and mechanical collision. Since the battery cell has high energy inside, once triggered, it may cause combustion, explosion and other phenomena, endangering life and property safety. In the battery pack, if there is no good safety measure, the temperature of the thermal runaway battery is so high that the heat generated is enough to trigger thermal runaway chain reaction in the form of thermal abuse to the adjacent battery.

[0004] In the prior art, thermal insulation cotton material is often used to inhibit the spread of thermal runaway in the battery pack. The commonly used glass fiber aerogel thermal insulation cotton cannot effectively inhibit the spread of thermal runaway in the module at a limited thickness. Even if the ceramic fiber aerogel or pre-oxidized fiber aerogel material has better thermal insulation performance, it is necessary to use very thick thermal insulation cotton to reduce the surface temperature of the thermal runaway battery below the safety temperature of the battery, which will reduce the space of the battery and lead to the reduction of the energy density of the system.

[0005] Therefore, it is necessary to continue to develop an inhibition module that can prevent thermal runaway of the battery cell. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of thermal inhibition module, battery pack and electronic equipment to solve the problem that the thickness of thermal inhibition module in prior art is still thick, energy density and inhibition thermal spread effect cannot be considered.

[0007] The utility model provides a kind of thermal inhibition module on the one hand, including composite layer;The composite layer includes thermal insulation layer, heat conducting layer and heat dissipation layer;

[0008] The heat conducting layer is arranged on the two sides of the heat dissipation layer, and the thermal insulation layer is arranged on the two sides of the heat conducting layer away from the heat dissipation layer.

[0009] The thermal inhibition module as described above, the thermal insulation layer includes thermal insulation material, the heat conducting layer includes heat conducting material, and the ratio of the thermal conductivity of the heat conducting material to the thermal insulation material is not less than 10.

[0010] The thermal inhibition module as described above, the thermal conductivity of the heat conducting material is not less than 7W / m 2 K.

[0011] The heat inhibition module as described above, wherein a thickness ratio of the thermal insulation layer, the thermal conductive layer and the heat dissipation layer is (200-0.15):(200-0.1):(0.05-0.005).

[0012] The heat inhibition module as described above, wherein a thickness of the composite layer is 0.5-4.1mm.

[0013] A thickness of the thermal insulation layer is 0.3-2.0mm.

[0014] A thickness of the heat dissipation layer is 0.2-2.0mm.

[0015] A thickness of the thermal conductive layer is 0.01-0.1mm.

[0016] The heat inhibition module as described above, wherein the thermal insulation material comprises at least one of aerogel insulation cotton material, mica sheet, vacuum insulation board, asbestos, glass wool, expanded perlite, slag wool, foamed ceramic.

[0017] The thermal conductive material comprises at least one of aluminum foil, copper foil, expanded graphite, carbon black, graphite, graphene, artificial diamond, copper oxide, sodium chloride.

[0018] The material of the heat dissipation layer is a material that absorbs heat to cause physical or chemical changes.

[0019] The heat inhibition module as described above, wherein the thermal insulation layer further comprises an optical screening agent with a mass percentage of 0-10%, and the optical screening agent has an infrared light radiation rate of 45-100% for a wavelength of 3-8μm.

[0020] The heat dissipation layer further comprises a binder with a mass percentage of 0-8%.

[0021] The heat dissipation layer further comprises a support material, and the support material has a mass percentage of 5-40% in the thermal insulation layer, and a length-diameter ratio of (5-5000):1.

[0022] The heat inhibition module as described above, wherein the optical screening agent comprises at least one of carbon black, SiC, potassium hexatitanate whisker, TiO2, ZrO2, Al2O3, coal ash; and / or,

[0023] The binder comprises at least one of sodium carboxymethyl cellulose, alginate, β-cyclodextrin, guar gum, gum arabic, chitosan, starch, xanthan gum, carrageenan, polyvinylidene fluoride, polyethylene glycol, polyacrylic acid, polyvinyl alcohol, poly(3,4-ethylenedioxythiophene), polyacrylamide-co-dimethylammonium chloride, styrene-butadiene rubber, polyimide, polyetherimide, polyacrylonitrile, epoxy resin, biphenyl tetracarboxylic dianhydride, polyvinylpyrrolidone, polybutyl acrylate, polyamide, polymethacrylonitrile-methyl acrylate, polyurethane.

[0024] The support material includes at least one of a fibrous material, a foamed material.

[0025] The heat dissipation module as claimed in any one of the preceding claims, wherein the material of the heat dissipation layer includes at least one of a phase change material and a chemical heat storage material.

[0026] A thermal inhibition module as described above, wherein the phase change material comprises glycolic acid, p-bromophenol, azobenzene, acrylic acid, 2,4-dinitrotoluene, phenylacetic acid, allyl thiourea, D-3 camphor pill, benzylamine, tetramethylbenzene, acetamide, methyl p-bromobenzoate, 1-naphthol, glutaric acid, dichloro-p-xylene, methyl fumarate, hydroquinone, quinone, acetanilide, erythritol, succinic anhydride, benzoic acid, stilbenes, benzamide, phenazone, p-aminotoluene, benzaldehyde phenylhydrazone, salicylic acid, benzoyl aniline, D-mannitol sugar, hydroquinone, p-aminobenzoic acid, LiClO3.3H2O, NH4Cl.Na2SO4.10H2O, K2HPO4.6H2O, NaCl.Na2SO4.10H2O, KF.4H2O, K2HPO4.4H2O, FeBr3.6H2O, Mn(NO3)2.6H2O, LiBO2.8H2O, CaCl2.6H2O, CaCl2.12H2O, LiNO3.3H2O, LiNO3.2H2O, Na2SO4.10H2O, Na2CO3.10H2O, KFe(SO4)2.12H2O, CaBr2.6H2O, LiBr.2H2O, Na2HPO4.12H2O, Zn(NO3)2.6H2O, Mn(NO3)2.4H2O, FeCl3.6H2O, CaCl2.4H2O, CuSO4.7H2O, KF.2H2O, MgI2.8H2O, CaI2.6H2O, Ca(NO3)2.4H2O, Zn(NO3)2.4H2O, K3PO4.7H2O, K2HPO4.7H2O, Fe(NO3)3.9H2O, Mg(NO3)2.4H2O, Na2SiO3.5H2O, Na2SiO3.4H2O, Na2HPO4.7H2O, Na2S2O3.5H2O, K2HPO4.3H2O, MgSO4.7H2O, Ca(NO3)2.3H2O, Na(NO3)2.6H2O, Zn(NO3)2.2H2O, FeCl3.2H2O, Co(NO3)2.6H2O, Ni(NO3)2.6H2O, MnCl2.4H2O, CH3COONa.3H2O, LiC2H3O2.2H2O, MgCl2.4H2O, NaOH.H2O, Cd(NO3)2.4H2O, Cd(NO3)2.H2O, Fe(NO3)2.6H2O, NaAl(SO4)2.12H2O, NaAl(SO4)2.10H2O, FeSO4.7H2O, Na3PO4.12H2O, LiCH3COO.2H2O, Na2P2O7.10H2O, Al(NO3)2.9H2O, Ba(OH)2.8H2O, Al2(SO4)3.18H2O, Sr(OH)2.8H2O,at least one of Mg(NO3)2.6H2O, KAl(SO4)2.12H2O, (NH4)Al(SO4).6H2O, LiCl.H2O, MgCl2.6H2O, LiNO3 / KCl, LiNO3 / NaNO3, KNO3 / NaNO3, LiNO3 / NaCl, NaNO3 / KNO3, LiNO / silica, NaNO3 / CuO, NaNO3 / EP, KNO3 / silica, Li2CO3 / Na2CO3 / K2CO3, NaCl / CaCl2 / MgCl2, MgCl2 / NaCl, MgCl2 / KCl, Li2CO3 / K2CO3, LiCO3 / K2CO3, Na2CO3 / Li2CO3, Li2CO3 / K2CO3, NaCl / Na2CO3, Na2CO3 / NaCl, Na2SO4 / silica, Na2SO4 / SiC ceramic foam; and / or,

[0027] The chemical heat storage material comprises at least one of Ni(OH)2, Mg(OH)2, MgH2, Co3O4, PbCO3, NH4HSO4, Ca(OH)2, Sr(OH)2, CaCO3, BaO2, Ba(OH)2, Al(OH)3, and NaHCO3.

[0028] The heat inhibition module as described above, wherein the material of the heat dissipation layer is inorganic material.

[0029] The heat inhibition module as described above, wherein the material of the heat dissipation layer is Mg(OH)2 and NaHCO3, and the mass ratio of Mg(OH)2 to NaHCO3 is 0.15-0.7.

[0030] The heat inhibition module as described above, further comprising a packaging layer, wherein the packaging layer surrounds the outside of the composite layer; the packaging layer comprises at least one of aluminum plastic film, nylon film, polyimide film, polypropylene film, polyethylene film, polyvinyl chloride film, and polyethylene terephthalate film; and the thickness of the packaging layer is 0.01-0.5 mm.

[0031] The utility model discloses still one aspect provides a battery pack, including N of heat inhibition module as described above and M electric core, N >=1, M >=2, set up the heat inhibition module between two adjacent electric core.

[0032] The utility model discloses still one aspect provides an electronic equipment, including the battery pack as described above.

[0033] The utility model provides a heat suppression module, including a composite layer; the composite layer includes a heat insulation layer, a heat conductive layer and a heat dissipation layer. The heat insulation layer is arranged on both sides of the heat conductive layer to prevent heat transfer, the heat conductive layer is arranged on both sides of the heat dissipation layer to evenly distribute the heat, and the heat dissipation layer absorbs and processes a large amount of heat that has been transferred, and converts the thermal energy into other forms of energy. The heat suppression module provided by the utility model can achieve the effect of suppressing heat spread under limited thickness and taking into account energy density. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a heat suppression module in one embodiment of the present invention;

[0035] Figure 2 This is a battery pack structure in one embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1: thermal insulation layer;

[0038] 2: Thermal conductive layer;

[0039] 3: heat dissipation layer;

[0040] 4: packaging layer;

[0041] 01: First battery cell;

[0042] 02: Second battery cell;

[0043] 03: The third battery cell;

[0044] 04: the fourth battery cell;

[0045] 05: fifth battery cell;

[0046] 100: Thermal suppression module. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] On the one hand, the present invention provides a heat suppression module. Figure 1 FIG. 1 is a schematic diagram of the structure of a heat suppression module in one embodiment of the present invention. Figure 1 As shown, it includes a composite layer; the composite layer includes a heat insulation layer 1, a heat conducting layer 2 and a heat dissipation layer 3;

[0049] The heat-conducting layer 2 is arranged on both sides of the heat-dissipating layer 3, and the heat-insulating layer 1 is arranged on both sides of the heat-conducting layer 2 away from the heat-dissipating layer 3.

[0050] Since the battery cell may trigger thermal runaway in the process of being heated, overcharged, over-discharged and mechanically collided, and the battery cell has a very high energy, once the thermal runaway is triggered, it may cause combustion, explosion and other phenomena, endangering the safety of life and property, and if there is no good safety measure in the battery pack, the temperature of the thermal runaway battery is so high that the heat generated thereby is enough to trigger a thermal runaway chain reaction in the form of thermal abuse of the adjacent battery.

[0051] The utility model provides a kind of heat inhibition module, which includes a composite layer, the composite layer includes heat-insulating layer 1, heat-conducting layer 2 and heat-dissipating layer 3;First, the heat-insulating layer 1 close to thermal runaway battery adopts heat-insulating material including good heat-insulating performance, which can delay the heat generated by the thermal runaway battery from being transferred to the adjacent battery, and within this time, the heat generated by the thermal runaway battery will dissipate to the environment in the form of heat radiation and contact heat transfer, and the high-temperature gas discharged from the explosion-proof valve of the thermal runaway battery will cool down the battery, and the heat-insulating material with good heat-insulating performance will inhibit the lateral transfer of heat and delay the occurrence of heat spread;The heat-conducting layer 2 includes heat-conducting material, which is used to distribute the heat transferred by the heat-insulating layer 1 evenly and then transfer it to the entire heat-dissipating layer 3 evenly;The heat-dissipating layer 3 includes heat-accumulating material, which is used to absorb and process the large amount of heat that has been transferred, convert the thermal energy into other forms of energy, and dissipate it;The heat-insulating layer 1 on the other side of the heat-dissipating layer 3 is used to prevent the heat from spreading further to the adjacent battery cell and increase the accumulation time of heat on the heat-dissipating layer 3, so that it can absorb the heat for a long enough time and react to convert it into other forms of energy to dissipate, weaken the heat transferred laterally by the thermal runaway battery, and achieve the effect of inhibiting heat spread.

[0052] Further, in a specific embodiment of the utility model, the heat-insulating layer includes heat-insulating material, and the heat-conducting layer includes heat-conducting material, and the ratio of the heat-conducting coefficients of the heat-conducting material and the heat-insulating material is not less than 10.

[0053] By limiting the ratio of the heat-conducting coefficients of the heat-conducting material and the heat-insulating material to be not less than 10, the heat that has passed through the heat-insulating layer 1 can be evenly transferred to the entire heat-dissipating layer 3 through the heat-conducting material, the heat that has passed through the heat-insulating layer 1 can be absorbed and converted into other forms of heat to dissipate to the maximum extent, the heat transferred laterally by the thermal runaway battery can be further weakened, and the effect of inhibiting heat spread can be achieved.

[0054] Further, the ratio of the thermal conductivity of the heat-conducting material to the thermal conductivity of the heat-insulating material is not less than 150; the ability of the heat-conducting layer 2 to uniformly distribute heat can be further improved, heat is more uniformly transmitted to the heat-dissipating layer 3, the heat-absorbing ability of the heat-dissipating layer 3 to heat is increased, and the heat-suppression module's ability to suppress heat spreading is further improved.

[0055] Further, the thermal conductivity of the heat-conducting material is not less than 7W / m 2 K.

[0056] The inventor finds that when the thermal conductivity of the heat-conducting material is not less than 7W / m 2 K, the ability of the heat-conducting layer 2 to uniformly distribute heat can be further improved, heat is more uniformly transmitted to the heat-dissipating layer 3, the heat-absorbing ability of the heat-dissipating layer 3 to heat is increased, and the heat-suppression module's ability to suppress heat spreading is further improved.

[0057] The thermal conductivity of the heat-conducting material can be further refined to 35-1950W / m 2 K.

[0058] Further, in a specific embodiment of the present application, the thickness ratio of the heat-insulating layer 1, the heat-conducting layer 2 and the heat-dissipating layer 3 is (200-0.15):(200-0.1):(0.05-0.005).

[0059] By limiting the thickness ratio of the heat-insulating layer 1, the heat-conducting layer 2 and the heat-dissipating layer 3, the volume utilization rate of the composite layer can be further improved, the thickness of the composite layer is reduced, and the energy density of the battery pack is improved; the synergistic effect between the heat-insulating layer 1, the heat-conducting layer 2 and the heat-dissipating layer 3 can be further played, and the heat-spreading suppression effect of the composite layer is further improved.

[0060] Further, in a specific embodiment of the present application, the thickness of the composite layer is 0.5-4.1mm; the thickness of the heat-insulating layer is 0.3-2.0mm; the thickness of the heat-dissipating layer is 0.2-2.0mm; and the thickness of the heat-conducting layer is 0.01-0.1mm.

[0061] Specifically, the thickness of the composite layer includes but is not limited to 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.1mm or a range consisting of any two of them; the thickness of the heat insulation layer 1 includes but is not limited to 0.3mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm or a range consisting of any two of them; the thickness of the heat dissipation layer 3 includes but is not limited to 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm or a range consisting of any two of them; the thickness of the heat conduction layer 2 includes but is not limited to 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm or a range consisting of any two of them.

[0062] The inventors found that when the composite layer and each layer therein are within the above defined ranges, the heat passing through the heat insulation layer 1 can be further uniformly guided to the heat dissipation layer 3, improving the effective utilization rate of the heat dissipation layer 3; further improving the volume utilization rate of the composite layer, reducing the thickness of the composite layer, while improving the energy density of the battery pack; at the same time, the synergistic effect between the heat insulation layer 1, the heat conduction layer 2 and the heat dissipation layer 3 can be further exerted, further improving the heat spread suppression effect of the composite layer.

[0063] The thickness of the composite layer can be further limited to 0.8-4.0mm; the thickness of the heat insulation layer 1 can be further limited to 0.4-1.4mm; the thickness of the heat dissipation layer 3 can be further limited to 0.2-1.2mm; the thickness of the heat conduction layer 2 can be further limited to 0.01-0.05mm.

[0064] Optionally, the heat insulation material includes at least one of aerogel heat insulation cotton material, mica sheet, vacuum heat insulation plate, asbestos, glass wool, expanded perlite, slag wool, foamed ceramic;

[0065] The heat conduction material includes at least one of aluminum foil, copper foil, expanded graphite, carbon black, graphite, graphene, artificial diamond, copper oxide, sodium chloride;

[0066] The material of the heat dissipation layer 3 is a material that absorbs heat to cause physical or chemical changes.

[0067] By specifically limiting the specific selection of the materials of each layer, the heat spread suppression effect of the composite layer can be further improved.

[0068] Optionally, the aerogel insulation material comprises at least one of glass fiber aerogel, ceramic fiber aerogel, pre-oxidized fiber aerogel, and nano-composite aerogel. Aerogel has low thermal conductivity due to its porous microstructure, effectively reducing heat conduction. Meanwhile, aerogel has high specific surface area and certain reflection ability to infrared radiation, thus achieving good thermal insulation performance.

[0069] In some embodiments, the aerogel material includes, but is not limited to, one of inorganic aerogel, organic aerogel, carbon aerogel, natural aerogel, and carbide aerogel, or a composite material composed of two or more of the above. The felt pad includes, but is not limited to, one or more of glass fiber felt, ceramic fiber felt, pre-oxidized fiber felt, alumina fiber felt, zirconia fiber felt, high-silica fiber felt, aramid fiber felt, mullite fiber felt, basalt fiber felt, carbon fiber felt, spandex fiber felt, polyester fiber felt, nylon fiber felt, polyethylene terephthalate (PET) fiber felt, non-woven fabric, fiber paper, foam, and other organic and inorganic fiber felt materials, or a foamed material with an open structure. Optionally, the inorganic aerogel includes, but is not limited to, monovalent oxide aerogel, metal-oxide aerogel, or binary oxide aerogel. Specifically, the monovalent oxide aerogel includes, but is not limited to, SiO2 aerogel, Al2O3 aerogel, TiO2 aerogel, Fe2O3 aerogel, MgO aerogel, Cr2O3 aerogel, MoO2 aerogel, ZrO2 aerogel, Nb2O5 aerogel, SnO2 aerogel, or B2O3 aerogel. The metal-oxide aerogel can be Cu / Al2O3 aerogel, Pd / Al2O3 aerogel, or Ni / Al2O3 aerogel. The binary oxide aerogel includes, but is not limited to, Al2O3 / SiO2 aerogel, P2O5 / SiO2 aerogel, B2O3 / SiO2 aerogel, Nb2O5 / SiO2 aerogel, Er2O3 / SiO2 aerogel, CuO / Al2O3 aerogel, NiO / Al2O3 aerogel, or ternary oxide aerogel including, but not limited to, CuO / ZnO / Al2O3 aerogel, B2O3 / P2O5 / SiO2 aerogel, MgO / Al2O3 / SiO2 aerogel, or B2O3 / P2O5 / SiO2 aerogel. Optionally, the organic aerogel can be resorcinol-formaldehyde (RF) organic aerogel, melamine formaldehyde (MF) aerogel, or phenol formaldehyde (PF) aerogel. Optionally, the carbon aerogel can be carbonized RF (resorcinol and formaldehyde) aerogel (CRF aerogel for short), carbon nanotube aerogel, or graphene aerogel. Optionally, the carbide aerogel can be SiC aerogel. Optionally, the natural aerogel can be all-natural wood aerogel.

[0070] In an embodiment, the heat insulation layer 1 further comprises an optical screening agent in a mass percentage of 0-10%, and the optical screening agent has an infrared radiation rate of 45-100% for infrared light with a wavelength of 3-8 μm;

[0071] Since heat transfer is mainly in the form of infrared radiation at high temperatures, i.e., at temperatures above 400°C, in order to enhance the blocking effect of the heat insulation layer 1 on high-temperature infrared radiation, an optical screening agent can be added to the commonly used heat insulation material, the optical screening agent has an infrared radiation rate of 45-100% for infrared light with a wavelength of 3-8 μm, which can further enhance the effect of the heat insulation layer 1 on heat transfer.

[0072] The heat dissipation layer 3 further comprises a binder in a mass percentage of 0-8%; the heat dissipation layer 3 further comprises a support material, and the support material has a mass percentage of 5-40% in the heat insulation layer 1, and the support material has an aspect ratio of (5-5000):1.

[0073] Since the heat storage material in the heat dissipation layer 3 is mostly in the form of powder or brittle material, a support material can be added, and a binder is mixed to press a heat dissipation layer 3 with a certain thickness; by limiting the content and size of the support material and the binder, the heat absorption effect of the heat dissipation layer 3 can be further improved, and the effect of the heat suppression module on suppressing heat spread can be improved.

[0074] In an embodiment, the optical screening agent comprises at least one of carbon black, SiC, potassium hexatitanate whisker, TiO2, ZrO2, Al2O3, and coal ash;

[0075] The binder comprises at least one of sodium carboxymethyl cellulose, alginate, β-cyclodextrin, guar gum, gum arabic, chitosan, starch, xanthan gum, carrageenan, polyvinylidene fluoride, polyethylene glycol, polyacrylic acid, polyvinyl alcohol, poly(3,4-ethylenedioxythiophene), polyacrylamide-co-dimethylammonium chloride, styrene-butadiene rubber, polyimide, polyetherimide, polyacrylonitrile, epoxy resin, pyromellitic dianhydride, polyvinylpyrrolidone, polybutyl acrylate, polyamide, polymethacrylonitrile-methyl acrylate, and polyurethane;

[0076] The support material comprises at least one of a fibrous material and a foamed material.

[0077] By further limiting the selection of the types of the optical screening agent, the binder, and the support material, the ability of the heat suppression module to suppress heat spread can be further improved.

[0078] In another embodiment, the material of the heat dissipation layer comprises at least one of a phase change material and a chemical heat storage material.

[0079] By using the phase change material or the chemical heat storage material, the heat energy can be further converted into other forms of energy for dissipation, and the ability of the heat suppression module to suppress heat spread can be further improved.

[0080] wherein the organic phase change material comprises at least one of glycolic acid, p-bromophenol, azobenzene, acrylic acid, 2,4-dinitrotoluene, phenylacetic acid, allyl thiourea, D-3 camphor pill, benzylamine, tetramethylbenzene, acetamide, methyl p-bromobenzoate, 1-naphthol, glutaric acid, dichloro-p-xylene, methyl fumarate, hydroquinone, quinone, acetanilide, erythritol, succinic anhydride, benzoic acid, stilbene, benzamide, phenazopyridine, p-aminotoluene, benzaldehyde phenylhydrazone, salicylic acid, benzoyl aniline, D-mannitol sugar, hydroquinone, p-aminobenzoic acid;

[0081] at least one of LiClO3.3H2O, NH4Cl.Na2SO4.10H2O, K2HPO4.6H2O, NaCl.Na2SO4.10H2O, KF.4H2O, K2HPO4.4H2O, FeBr3.6H2O, Mn(NO3)2.6H2O, LiBO2.8H2O, CaCl2.6H2O, CaCl2.12H2O, LiNO3.3H2O, LiNO3.2H2O, Na2SO4.10H2O, Na2CO3.10H2O, KFe(SO4)2.12H2O, CaBr2.6H2O, LiBr.2H2O, Na2HPO4.12H2O, Zn(NO3)2.6H2O, Mn(NO3)2.4H2O, FeCl3.6H2O, CaCl2.4H2O, CuSO4.7H2O, KF.2H2O, MgI2.8H2O, CaI2.6H2O, Ca(NO3)2.4H2O, Zn(NO3)2.4H2O, K3PO4.7H2O, K2HPO4.7H2O, Fe(NO3)3.9H2O, Mg(NO3)2.4H2O, Na2SiO3.5H2O, Na2SiO3.4H2O, Na2HPO4.7H2O, Na2S2O3.5H2O, K2HPO4.3H2O, MgSO4.7H2O, Ca(NO3)2.3H2O, Na(NO3)2.6H2O, Zn(NO3)2.2H2O, FeCl3.2H2O, Co(NO3)2.6H2O, Ni(NO3)2.6H2O, MnCl2.4H2O, CH3COONa.3H2O, LiC2H3O2.2H2O, MgCl2.4H2O, NaOH.H2O, Cd(NO3)2.4H2O, Cd(NO3)2.H2O, Fe(NO3)2.6H2O, NaAl(SO4)2.12H2O, NaAl(SO4)2.10H2O, FeSO4.7H2O, Na3PO4.12H2O, LiCH3COO.2H2O, Na2P2O7.10H2O, Al(NO3)2.9H2O, Ba(OH)2.8H2O, Al2(SO4)3.18H2O, Sr(OH)2.8H2O, Mg(NO3)2.6H2O, KAl(SO4)2.12H2O, (NH4)Al(SO4).6H2O, LiCl.H2O, MgCl2.6H2O;

[0082] The molten salt phase change material includes at least one of LiNO3 / KCl, LiNO3 / NaNO3, KNO3 / NaNO3, LiNO3 / NaCl, NaNO3 / KNO3, LiNO / silica, NaNO3 / CuO, NaNO3 / EP, KNO3 / silica, Li2CO3 / Na2CO3 / K2CO3, NaCl / CaCl2 / MgCl2, MgCl2 / NaCl, MgCl2 / KCl, Li2CO3 / K2CO3, LiCO3 / K2CO3, Na2CO3 / Li2CO3, Li2CO3 / K2CO3, NaCl / Na2CO3, Na2CO3 / NaCl, Na2SO4 / silica, and Na2SO4 / SiC ceramic foam;

[0083] The chemical heat storage material includes at least one of Ni(OH)2, Mg(OH)2, MgH2, Co3O4, PbCO3, NH4HSO4, Ca(OH)2, Sr(OH)2, CaCO3, BaO2, Ba(OH)2, Al(OH)3, and NaHCO3.

[0084] Further, in a specific embodiment of the present application, the material of the heat dissipation layer is inorganic material.

[0085] When the heat storage material is inorganic material, not only the heat can be converted to reduce the overall heat, but also the flammable risk of the heat dissipation layer 3 under high temperature condition can be further reduced, and part of the material can be decomposed at high temperature to produce water, carbon dioxide and other gases, which can effectively dilute the combustible gas or flammable gas concentration around the thermal runaway battery, further reducing the safety problem of the thermal runaway battery.

[0086] In a specific embodiment, the material of the heat dissipation layer is MgH2 and Mg(OH)2, and the mass ratio of Mg(OH)2 and NaHCO3 is 0.3-0.6.

[0087] The inventors have found that when the heat storage material is in the above defined combination ratio, the effective utilization rate of the heat dissipation layer 3 can be further improved, the safety problem of the thermal runaway battery can be further reduced, and the effect of the heat suppression module on suppressing heat spread can be improved.

[0088] Further, the suppression module further comprises a packaging layer 4, which surrounds the outside of the composite layer; the packaging layer 4 comprises at least one of aluminum plastic film, nylon film, polyimide film, polypropylene film, polyethylene film, polyvinyl chloride film and polyethylene terephthalate (PET); and the thickness of the packaging layer 4 is 0.01-0.1 mm.

[0089] Through the packaging layer 4, it can be ensured that the composite layer will not be deliquesced by water vapor in the air, and the suppression effect of the heat suppression module can be further improved.

[0090] In a second aspect, the utility model provides a kind of battery pack, including N first aspect's heat suppression module and M electric core, N≥1, M≥2;Two adjacent electric cores between being arranged heat suppression module.

[0091] The utility model provides a kind of battery pack, including N composite layer and M electric core, M electric core is connected in series and / or parallel connection;By being arranged heat suppression module between every two adjacent electric core, can effectively delay heat spread when monomer electric core occurs thermal runaway, and because the structure of heat suppression module and the thermal conductivity coefficient ratio of heat-conducting material and heat-insulating material is not less than 10, it can reach the effect of inhibiting heat spread in limited thickness, with energy density.

[0092] In a third aspect, the utility model provides a kind of electronic equipment, including the battery pack of second aspect.

[0093] The utility model provides a kind of electronic equipment, including above-mentioned battery pack, reduce the security risk of electronic equipment.

[0094] The utility model does not limit the specific kind of electronic equipment, can include electric vehicle, mobile phone, smart home, robot, unmanned aerial vehicle, electronic cigarette, sound box and any equipment needing battery component to power for it.

[0095] Below, a kind of heat suppression module provided by the utility model is introduced in detail by specific embodiment.

[0096] Example 1

[0097] The heat suppression module in the embodiment includes composite layer and packaging layer;Composite layer includes heat insulation layer, heat-conducting layer, heat dissipation layer;Wherein, heat-conducting layer is arranged at the two sides of heat dissipation layer, heat insulation layer is arranged at the two sides of heat-conducting layer away from heat dissipation layer;Packaging layer is surrounded at the outside of composite layer;

[0098] Heat insulation layer uses 1.0mm glass fiber aerogel heat insulation cotton (thermal conductivity is 0.023W / m 2 K), adds 5% TiO2 sunscreen;

[0099] Heat dissipation layer uses 0.9mm NaHCO3 powder, does not add binder and reinforcing fiber;

[0100] Heat-conducting layer uses 20 μm aluminum foil (thermal conductivity is 200W / m 2 K);

[0101] Packaging layer uses 30 μm aluminum plastic film.

[0102] Example 2

[0103] The heat suppression module in this embodiment includes a composite layer and a packaging layer; the composite layer includes a heat insulation layer, a heat conduction layer, and a heat dissipation layer; wherein the heat conduction layer is arranged on both sides of the heat dissipation layer, and the heat insulation layer is arranged on both sides of the heat conduction layer away from the heat dissipation layer; the packaging layer surrounds the outside of the composite layer;

[0104] The thermal insulation layer uses 0.8mm thick soft mica sheet (thermal conductivity is 0.63W / m 2 K);

[0105] The heat dissipation layer uses a mixed material of 0.86mm Mg(OH)2 and Al(OH)3 with a mass ratio of 1:3, a 1.5% mass percentage of sodium carboxymethyl cellulose binder, and a 5% mass percentage of mullite fiber support material (aspect ratio of 7.32 to 15:1);

[0106] The heat conducting layer is made of a block material made of expanded graphite with a thickness of 0.25mm and polyvinyl alcohol with a mass ratio of 95:5 (the thermal conductivity of the expanded graphite is 65.6W / m 2 K);

[0107] The packaging layer uses 20μm polynylon film.

[0108] Example 3

[0109] The heat suppression module in this embodiment includes a composite layer and a packaging layer; the composite layer includes a heat insulation layer, a heat conduction layer, and a heat dissipation layer; wherein the heat conduction layer is arranged on both sides of the heat dissipation layer, and the heat insulation layer is arranged on both sides of the heat conduction layer away from the heat dissipation layer; the packaging layer surrounds the outside of the composite layer;

[0110] The thermal insulation layer is made of 1.0mm thick asbestos (thermal conductivity is 0.37W / m 2 K);

[0111] The heat dissipation layer uses 0.8mm LiNO3·3H2O phase change material, mixed with 1% sodium carboxymethyl cellulose binder;

[0112] The thermal conductive layer is made of 80μm Cu foil (thermal conductivity is 380W / m 2 K);

[0113] The packaging layer uses 20μm PET film.

[0114] Example 4

[0115] The difference between this embodiment and embodiment 1 is that the thickness of the thermal insulation cotton used in the thermal insulation layer is 0.6 mm.

[0116] Example 5

[0117] The difference between this embodiment and embodiment 1 is that the thickness of the heat dissipation layer is 0.6 mm.

[0118] Example 6

[0119] The difference between this embodiment and embodiment 1 is that the heat conducting layer uses aluminum foil with a thickness of 10 μm.

[0120] Example 7

[0121] The difference between this embodiment and embodiment 1 is that the heat conducting layer is made of 20 μm Cu foil (thermal conductivity is 380 W / m 2 K).

[0122] Example 8

[0123] The difference between this embodiment and embodiment 1 is that the thickness of the heat insulation layer is 1.2 mm.

[0124] Comparative Example 1

[0125] The heat suppression module in this comparative example is made of 3mm glass fiber aerogel insulation cotton material.

[0126] Comparative Example 2

[0127] The difference between this comparative example and Example 1 is that the heat suppression module includes a composite layer and a packaging layer; the composite layer includes a heat insulation layer and a heat dissipation layer; wherein the heat insulation layer is arranged on both sides of the heat dissipation layer, and the heat insulation layer uses 1.0mm heat insulation cotton material; the packaging layer uses 50μm PET film to surround the outside of the composite layer.

[0128] Test Example 1

[0129] The thermal suppression modules in the above embodiments and comparative examples were tested to simulate the thermal runaway diffusion of the national standard (GB / T36276-2018). Figure 2 As shown, five fully charged cells, namely the first cell 01, the second cell 02, the third cell 03, the fourth cell 04 and the fifth cell 05, are placed side by side, and the thermal suppression modules 100 prepared in the experiment are placed in the middle and at both ends to assemble into a battery pack. 1C constant current overcharging triggers thermal runaway in the third cell 03 of the battery pack. After the third cell 03 triggers thermal runaway, charging is stopped and observed for 1 hour to see whether other cells trigger thermal runaway. The test results are shown in Table 1.

[0130] Table 1

[0131]

[0132]

[0133] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat suppression module, characterized in that: Comprising a composite layer; the composite layer comprises a heat insulating layer, a heat conducting layer and a heat dissipating layer; The heat-conducting layer is arranged on both sides of the heat-dissipating layer, and the heat-insulating layer is arranged on both sides of the heat-conducting layer away from the heat-dissipating layer.

2. The heat suppression module according to claim 1, wherein: The heat insulation layer includes a heat insulation material, the heat conductive layer includes a heat conductive material, and the ratio of the thermal conductivity coefficients of the heat conductive material to the heat insulation material is not less than 10.

3. The heat suppression module according to claim 2, characterized in that The thermal conductivity of the thermal conductive material is not less than 7W / m 2 K.

4. The suppression module according to claim 1, characterized in that: The thickness ratio of the heat insulating layer, the heat conducting layer and the heat dissipating layer is (200-0.15): (200-0.1): (0.05-0.005).

5. The heat suppression module according to claim 4, characterized in that The thickness of the composite layer is 0.5 to 4.1 mm; The thickness of the thermal insulation layer is 0.3 to 2.0 mm; The heat dissipation layer has a thickness of 0.2 to 2.0 mm; The thickness of the heat-conducting layer is 0.01-0.1 mm.

6. The heat suppression module according to claim 5, characterized in that The heat dissipation layer further includes a supporting material. The mass percentage of the supporting material in the heat insulation layer is 5-40%, and the aspect ratio of the supporting material is (5-5000):

1.

7. The heat suppression module according to any one of claims 1 to 6, characterized in that: The heat suppression module further includes a packaging layer, which surrounds the outside of the composite layer; the thickness of the packaging layer is 0.01 to 0.5 mm.

8. A battery pack, characterized in that: The invention comprises N thermal suppression modules according to any one of claims 1 to 7 and M battery cells, where N≥1 and M≥2; the thermal suppression module is arranged between two adjacent battery cells.

9. An electronic device, characterized in that: Including the battery pack according to claim 8.

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