Multi-layer composite heat insulation rubber pad

Abstract

The utility model relates to the technical field of automobile batteries, in particular to a multi-layer composite heat insulation rubber pad which comprises a composite heat insulation part, the composite heat insulation part comprises a frame body with a square section, and a plurality of first connecting strips are fixed on the front side wall and the rear side wall of the frame body; a through buffer cavity is formed in the top of the buffer layer, a plurality of sets of buffer assemblies composed of two symmetrical arc-shaped buffer pieces are fixed in the cavity at equal intervals, and through grooves are further formed in the buffer pieces. When the battery is impacted by external force or the battery core expands with heat and contracts with cold, the buffer layer and the buffer assembly can absorb and disperse energy through elastic deformation, so that the stress is effectively relieved, and the battery is protected from being damaged; the connecting grooves are formed in the front wall and the rear wall of the connecting layer and matched with the first connecting strips of the frame body and the second connecting strips of the buffer layer in an inserted mode, so that the composite heat insulation part, the connecting layer and the buffer layer are tightly connected together, and the stability and reliability of the whole rubber pad structure are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile battery, specifically is a multilayer composite heat insulation rubber pad. BACKGROUND

[0002] The heat insulation rubber pad for new energy automobile battery is a kind of heat insulation material specially used in new energy automobile battery system, usually with rubber as base material, realizes excellent heat insulation, flame retardant, shock attenuation etc. by adding heat insulation filler or using special structure design.Its main function is to isolate the heat transfer between battery monomer or module, prevent heat runaway diffusion, buffer mechanical vibration at the same time, protect battery structure safety, prolong battery service life.

[0003] The utility model discloses a battery module, the battery module includes a plurality of single battery, sequentially stacked along the arrangement direction, and heat insulation pad is adhered between the two adjacent single batteries via the glue coated on the front and back two surfaces.The heat insulation pad is provided with through hole for accommodating glue, and the glue in the through hole adheres the two adjacent single batteries.In the battery module according to the utility model, the heat insulation pad can effectively isolate the heat transfer of the two adjacent single batteries, and in the assembly process of the battery module, the two adjacent single batteries extrude the heat insulation pad, the glue on the heat insulation pad flows into the through hole of the heat insulation pad after extrusion, and then the two adjacent single batteries are directly adhered together, to ensure the connection strength between the adjacent single batteries.

[0004] The above device, although the connection strength between the adjacent single batteries is ensured by the heat insulation pad, but the heat insulation pad still has the following problems in actual time: in the use process of automobile battery, the battery cell expands due to heat generation in the charging and discharging process, and shrinks after stopping working in low temperature environment, since the heat insulation pad lacks buffer structure design, it cannot adapt to the periodic size change of battery cell.When the battery cell expands, the heat insulation pad will form physical constraint, force the battery cell to bear abnormal mechanical stress, cause irreversible deformation of battery shell and dislocation of internal electrode;When the battery cell shrinks, gap appears between the heat insulation pad and the battery cell, loses effective protection, in view of this, we propose a multilayer composite heat insulation rubber pad. UTILITY MODEL CONTENTS

[0005] The utility model aims at at least one of the technical problems in the related art to some extent.Therefore, one purpose of the utility model is to propose a multilayer composite heat insulation rubber pad, the buffer layer and buffer assembly can absorb and disperse energy by elastic deformation, effectively relieve stress, protect battery from damage.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A multi-layer composite heat insulation rubber pad comprises a composite heat insulation part, the composite heat insulation part comprises a frame body with a cross-section shape of a mouth-shaped type, a plurality of first connecting strips are fixed on the front and rear sidewalls of the frame body; a cavity is formed in the frame body, a first heat insulation layer is installed at the center of the cavity, and second heat insulation layers are fixed on the two sides of the first heat insulation layer;

[0008] Two connecting layers symmetrically distributed are fixed on the front and rear sides of the frame body; a plurality of connecting grooves are formed in the front and rear walls of the connecting layer, and the first connecting strips are inserted and matched with the corresponding connecting grooves;

[0009] Two buffer layers symmetrically distributed are fixed on the outer walls of the connecting layer; a buffer cavity is formed in the top of the buffer layer, and a plurality of buffer assemblies are fixed in the buffer cavity at equal intervals; each buffer assembly is composed of two symmetrically arranged arc-shaped buffer pieces, and a through slot is formed in the buffer piece; a plurality of second connecting strips are fixed on the end surface of the buffer layer close to the connecting layer, and the second connecting strips are inserted and matched with the corresponding connecting grooves;

[0010] Two heat insulation coating layers are respectively coated on the outer wall surfaces of the two buffer layers, and the two heat insulation coating layers are symmetrically distributed.

[0011] In addition, the multi-layer composite heat insulation rubber pad proposed in the application can have the following additional technical features:

[0012] Specifically, the frame body is integrally formed of ethylene-propylene-diene rubber material, and the thickness is 5-8 mm;

[0013] Specifically, the first heat insulation layer and the second heat insulation layer are tightly bonded, and the first heat insulation layer and the second heat insulation layer completely fill the internal cavity of the frame body;

[0014] Specifically, the first heat insulation layer is a finished product made of aerogel material, the second heat insulation layer is a finished product made of graphene modified ceramic fiber felt, and the thickness of the first heat insulation layer is greater than the thickness of the second heat insulation layer.

[0015] In this three-item setting, the mouth-shaped design provides a precise installation space for the internal heat insulation layer, and the first heat insulation layer and the second heat insulation layer form a seamless heat insulation system. Meanwhile, the differentiated material and thickness design can form a gradient heat insulation structure.

[0016] Specifically, the cross-sectional area of the connecting layer is equal to the cross-sectional area of the buffer layer and the frame body, and the connecting layer is made of polycarbonate;

[0017] In this setting, the polycarbonate material ensures the high strength and dimensional stability of the connecting layer

[0018] Specifically, the buffer layer and the buffer piece are an integrally formed structure, and the buffer layer and the buffer piece are made of ethylene-vinyl acetate copolymer.

[0019] In the arrangement, the ethylene-vinyl acetate copolymer is integrally formed, and has good elastic deformation capacity.

[0020] Specifically, the heat insulation coating layer is a water-based nano titanium dioxide-aluminum oxide composite coating, and the thickness of the heat insulation coating layer is 0.4-0.6mm.

[0021] In the arrangement, the coating has good heat insulation performance, weather resistance and environmental protection performance, so that the heat insulation coating layer forms a high-efficiency heat insulation barrier, and the device can better play a heat insulation and protection role.

[0022] Compared with the prior art, the utility model has the advantages of:

[0023] 1. The buffer layer is provided with a buffer cavity penetrating through the top, and a plurality of buffer assemblies composed of two symmetrical arc-shaped buffer pieces are fixed in the cavity at equal intervals, and penetrating slots are further formed in the buffer pieces. When subjected to external impact or thermal expansion and contraction of the battery cell, the buffer layer and the buffer assembly can absorb and disperse energy through elastic deformation, effectively relieve stress and protect the battery from damage.

[0024] 2. The composite heat insulation part is designed in multiple layers, the first heat insulation layer at the center is made of aerogel material, the aerogel has extremely low thermal conductivity and can effectively block heat transfer; the second heat insulation layer on both sides is a graphene modified ceramic fiber felt, the excellent thermal performance of graphene is combined with the heat insulation characteristics of the ceramic fiber felt to further enhance the heat insulation capacity. The first heat insulation layer and the second heat insulation layer are tightly bonded and completely fill the internal cavity of the frame, reducing air convection and heat conduction paths and improving overall heat insulation performance.

[0025] 3. By opening connecting grooves in the front and rear walls of the connecting layer, and inserting and cooperating with the first connecting strips of the frame and the second connecting strips of the buffer layer, the composite heat insulation part, the connecting layer and the buffer layer are tightly connected together, ensuring the stability and reliability of the entire rubber pad structure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the overall explosion structure of the utility model;

[0028] Figure 3 It is a structure top view of the frame in the utility model;

[0029] Figure 4 It is a schematic diagram of the partial explosion structure in the utility model;

[0030] Figure 5The structure of the buffer layer is shown in the top view of the utility model.

[0031] Figure 6 The utility model discloses Figure 5 The enlarged structure schematic diagram of A part in the utility model is shown in the figure.

[0032] In the figure,

[0033] 1, composite heat insulation part;10, frame body;11, first connecting strip;12, first heat insulation layer;13, second heat insulation layer;

[0034] 2, connecting layer;20, connecting groove;

[0035] 3, buffer layer;30, buffer cavity;31, buffer sheet;310, through slot;32, second connecting strip;

[0036] 4, heat insulation coating layer. DETAILED DESCRIPTION

[0037] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0038] The embodiment provides a kind of technical scheme:

[0039] Please refer to Figures 1-4 As shown in the figure, a kind of multilayer composite heat insulation rubber pad, including composite heat insulation part 1, composite heat insulation part 1 includes the frame body 10 of the section shape of mouth character type, the front and back two side walls of frame body 10 are all fixed with multiple first connecting strips 11;Frame body 10 is internally provided with cavity, and first heat insulation layer 12 is installed in the center of cavity, and the two sides of first heat insulation layer 12 are all fixed with second heat insulation layer 13;

[0040] In the embodiment, frame body 10 is integrally formed by using ethylene propylene diene rubber material, and the thickness is 5-8mm. The preferred thickness of frame body 10 is 6mm;The design has high elasticity and mechanical strength. The mouth character design provides accurate installation space for internal heat insulation layer, and the first connecting strip 11 of side wall cooperates with connecting layer 2, guarantees overall connection strength, and itself is aging-resistant and corrosion-resistant, prolongs the service life of rubber pad.

[0041] In the embodiment, first heat insulation layer 12 and second heat insulation layer 13 are closely bonded, and first heat insulation layer 12 and second heat insulation layer 13 completely fill the internal cavity of frame body 10. Closely bonded and completely filled cavity of frame body 10 form a seamless heat insulation system.

[0042] In the embodiment, the first thermal insulation layer 12 is an aerogel material product, the second thermal insulation layer 13 is a graphene modified ceramic fiber felt product, and the thickness of the first thermal insulation layer 12 is greater than the thickness of the second thermal insulation layer 13. The first thermal insulation layer 12 of the aerogel material and the second thermal insulation layer 13 of the graphene modified ceramic fiber felt block the heat conduction path and reduce the battery heat exchange efficiency by using the low thermal conductivity and high thermal resistance characteristics. The differentiated material and thickness design can form a gradient thermal insulation structure.

[0043] Referring to Figures 1-2 As shown in the figure, two symmetrically distributed connecting layers 2 are respectively fixed on the front and rear sides of the frame body 10; the front and rear walls of the connecting layer 2 are provided with a plurality of connecting grooves 20, and the first connecting strip 11 is inserted and matched with the corresponding connecting groove 20;

[0044] Referring to Figures 1-2 As shown in the figure, in the embodiment, the cross-sectional area of the connecting layer 2 is equal to the cross-sectional area of the buffer layer 3 and the frame body 10, and the connecting layer 2 is made of polycarbonate. The polycarbonate material ensures the high strength and dimensional stability of the connecting layer 2, and the equal cross-section design ensures that each layer is uniformly stressed.

[0045] Referring to Figures 5-6 As shown in the figure, two symmetrically distributed buffer layers 3 are respectively fixed on the outer walls of the connecting layer 2; the top of the buffer layer 3 is provided with a buffer cavity 30 penetrating through, and a plurality of buffer assemblies are fixed in the buffer cavity 30 at equal intervals; each buffer assembly is composed of two symmetrically arranged arc-shaped buffer pieces 31, and the buffer piece 31 is provided with a penetrating slot 310; the buffer layer 3 is fixed with a plurality of second connecting strips 32 at one end surface close to the connecting layer 2, and the second connecting strip 32 is inserted and matched with the corresponding connecting groove 20;

[0046] In the embodiment, the buffer layer 3 and the buffer piece 31 are an integral molding structure, and the buffer layer 3 and the buffer piece 31 are made of ethylene-vinyl acetate copolymer. The integral molding design of the ethylene-vinyl acetate copolymer makes the buffer layer 3 and the buffer piece 31 have good elastic deformation ability; and the buffer cavity 30 and the buffer assembly design effectively absorb and disperse stress through the arc-shaped buffer piece 31 and the slot 310 when the battery expands or shrinks due to heat or external force impact, thereby protecting the integrity of the battery structure.

[0047] Referring to Figures 1-2 As shown in the figure, two thermal insulation paint layers 4 are respectively coated on the outer wall surfaces of the two buffer layers 3, and the two thermal insulation paint layers 4 are symmetrically distributed.

[0048] In the embodiment, the thermal insulation coating layer 4 is a water-based nano titanium dioxide-aluminum oxide composite coating, and the thickness of the thermal insulation coating layer 4 is 0.4-0.6 mm. The preferred thickness of the thermal insulation coating layer 4 is 0.5 mm. The nano material enhances the reflection and scattering ability of thermal radiation, and has the characteristics of waterproofing and corrosion resistance, thereby providing additional protection for the buffer layer 3 and improving the comprehensive performance of the rubber pad.

[0049] It should be noted that, in the embodiment, the water-based nano titanium dioxide-aluminum oxide composite coating can be uniformly coated on the outer wall of the buffer layer 3 by a high-pressure airless spraying process. The surface of the buffer layer is subjected to dust removal and roughening treatment before spraying to enhance the adhesion effect of the coating. During the spraying process, the movement speed of the spray gun and the output amount of the coating are precisely controlled to ensure that a coating layer with uniform thickness is formed. The coating is tightly combined with the buffer layer 3 through the dual action of physical adsorption and chemical cross-linking, can resist frequent temperature changes and shock impact during vehicle operation, and is not easy to peel off during long-term use, thereby continuously playing the heat insulation and protection function.

[0050] It can be understood that the frame body 10 is made of ethylene-propylene-diene rubber material and has a certain heat insulation property. The mouth-shaped structure forms a closed space to reduce heat convection. The first thermal insulation layer 12 in the interior is made of aerogel material, which effectively inhibits heat conduction and convection. The second thermal insulation layer 13 is a graphene modified ceramic fiber felt. The graphene has high thermal conductivity to uniformly disperse heat, and the ceramic fiber felt has low thermal conductivity to block heat transfer. The thermal insulation coating layer 4 is composed of a water-based nano titanium dioxide-aluminum oxide composite coating. The nano particles reduce heat radiation transmission through reflection and scattering of infrared rays. The layers are tightly matched to block the heat conduction, convection and radiation paths.

[0051] When the battery cell expands and shrinks due to heat or is impacted by external force, the arc-shaped buffer sheet 31 in the buffer cavity 30 and the through slot 310 thereof absorb energy through elastic deformation. The through slot 310 makes the buffer sheet 31 more easily deformed and capable of dispersing stress. Meanwhile, the air in the buffer cavity 30 plays a buffering role to convert the impact force into elastic potential energy, thereby protecting the battery structure from stress damage.

[0052] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite thermal insulation rubber pad, characterized in that, include: The composite heat insulation part (1) includes a frame (10) with a cross-sectional shape of U-shape. Multiple first connecting strips (11) are fixed on the front and rear side walls of the frame (10). A cavity is opened inside the frame (10). A first heat insulation layer (12) is installed at the center of the cavity. A second heat insulation layer (13) is fixed on both sides of the first heat insulation layer (12). Two symmetrically distributed connecting layers (2) are fixed to the front and rear sides of the frame (10) respectively; multiple connecting grooves (20) are provided on the front and rear walls of the connecting layers (2), and the first connecting strip (11) is inserted into the corresponding connecting groove (20); Two symmetrically distributed buffer layers (3) are fixed to the outer wall of the connecting layer (2); a through buffer cavity (30) is opened at the top of the buffer layer (3), and multiple sets of buffer components are fixed at equal intervals in the buffer cavity (30); each set of buffer components consists of two symmetrical arc-shaped buffer pieces (31), and the buffer pieces (31) are provided with through slots (310); multiple second connecting strips (32) are fixed on one end face of the buffer layer (3) near the connecting layer (2), and the second connecting strips (32) are inserted into the corresponding connecting slots (20); Two heat-insulating coating layers (4) are respectively coated on the outer wall surface of the two buffer layers (3), and the two heat-insulating coating layers (4) are symmetrically distributed.

2. The multilayer composite thermal insulation rubber pad according to claim 1, characterized in that: The frame (10) is integrally molded from EPDM rubber with a thickness of 5-8mm.

3. The multilayer composite heat-insulating rubber pad according to claim 1, characterized in that: The first heat insulation layer (12) and the second heat insulation layer (13) are tightly bonded together, and the first heat insulation layer (12) and the second heat insulation layer (13) completely fill the internal cavity of the frame (10).

4. The multilayer composite thermal insulation rubber pad according to claim 1, characterized in that: The first heat insulation layer (12) is an aerogel material product, and the second heat insulation layer (13) is a graphene-modified ceramic fiber felt product, and the thickness of the first heat insulation layer (12) is greater than the thickness of the second heat insulation layer (13).

5. The multilayer composite thermal insulation rubber pad according to claim 1, characterized in that: The cross-sectional area of ​​the connecting layer (2) is equal to that of the buffer layer (3) and the frame (10), and the connecting layer (2) is made of polycarbonate.

6. The multilayer composite thermal insulation rubber pad according to claim 1, characterized in that: The buffer layer (3) and the buffer sheet (31) are integrally molded structures, and the buffer layer (3) and the buffer sheet (31) are made of ethylene-vinyl acetate copolymer.

7. The multilayer composite thermal insulation rubber pad according to claim 1, characterized in that: The heat insulation coating layer (4) is a water-based nano-titanium dioxide-alumina composite coating, and the thickness of the heat insulation coating layer (4) is 0.4-0.6 mm.

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