CN220021408U - Guard board, battery pack and vehicle - Google Patents
Guard board, battery pack and vehicle Download PDFInfo
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- CN220021408U CN220021408U CN202321037328.1U CN202321037328U CN220021408U CN 220021408 U CN220021408 U CN 220021408U CN 202321037328 U CN202321037328 U CN 202321037328U CN 220021408 U CN220021408 U CN 220021408U
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a guard plate, a battery pack and a vehicle, wherein the guard plate comprises: a metal layer; the first protective layer and the second protective layer are respectively arranged on two sides of the metal layer, the first protective layer and the second protective layer respectively comprise a network structure and a sealing piece, the network structure is provided with meshes, shear thickening fluid is distributed in the meshes, and the sealing piece is used for sealing and coating the network structure and the shear thickening fluid. Among the above-mentioned backplate, set up respectively in the first protective layer and the second protective layer of metal level both sides respectively including network structure and sealing member, the mesh of network structure is interior to be distributed with shear thickening fluid and sealing member sealed cladding network structure, can promote the shock resistance of backplate.
Description
Technical Field
The utility model relates to the technical field of battery packs, in particular to a guard board, a battery pack and a vehicle.
Background
In the actual running process of the new energy automobile, the battery pack at the bottom of the automobile is easy to damage parts in the battery pack due to the impact or extrusion of stones or metal sharp objects on the pavement, and even causes safety accidents caused by high-voltage short circuit. Therefore, how to effectively improve the shock resistance of the battery pack and ensure the structural integrity of the internal components of the battery pack becomes one of the difficulties of the new energy automobile enterprises to be overcome.
In the related battery pack protection structure, a protection plate is generally added at the bottom of the battery pack, but the protection plate is easy to deform or damage after being subjected to external action, the protection plate has the characteristic of weak impact resistance, and the protection plate can be stressed by vibration deformation from a battery pack main body.
Disclosure of Invention
The embodiment of the utility model provides a guard board, a battery pack and a vehicle.
A guard plate of an embodiment of the present utility model includes:
a metal layer;
the first protective layer and the second protective layer are respectively arranged on two sides of the metal layer, the first protective layer and the second protective layer respectively comprise a network structure and a sealing piece, the network structure is provided with meshes, shear thickening fluid is distributed in the meshes, and the sealing piece is used for sealing and coating the network structure and the shear thickening fluid.
Among the above-mentioned backplate, set up respectively in the first protective layer and the second protective layer of metal level both sides respectively including network structure and sealing member, the mesh of network structure is interior to distribute and to have shear thickening fluid and sealing member sealed cladding network structure, can promote backplate shock resistance. Meanwhile, when the protective sheet is used for the bottom of the battery pack, vibration deformation from the battery pack can be resisted under the holding of the first protective layer, the second protective layer and the metal layer.
In certain embodiments, the network structure is a fibrous network structure.
In certain embodiments, the fibrous network structure comprises a multi-layered sub-fibrous network structure disposed in a stack.
In certain embodiments, the fibrous network structure comprises para-aramid fibers, high density polyethylene fibers, or polybenzoxazole fibers.
In certain embodiments, the seal comprises a shear thickening colloid.
In certain embodiments, the seal comprises a solid organoborosiloxane polymer.
In some embodiments, the guard plate is adapted to be disposed at a bottom of a battery pack, the battery pack is provided with a battery accommodating cavity, the first protective layer is disposed on a side of the metal layer adjacent to the battery accommodating cavity, and the first protective layer is bonded to the metal layer.
In some embodiments, the guard plate is adapted to be disposed at a bottom of a battery pack, the battery pack is provided with a battery accommodating cavity, the second protective layer is disposed on a side of the metal layer away from the battery accommodating cavity, and the second protective layer is bonded to the metal layer.
In certain embodiments, the metal layer has a thickness of 0.5mm to 2.5mm; the thickness of the first protective layer is 1 mm-3 mm; the thickness of the second protective layer is 1 mm-3 mm.
In certain embodiments, the first protective layer and/or the second protective layer has a thermal conductivity of 0.12W/mK or less.
In some embodiments, the guard plate is provided with mounting holes penetrating the metal layer, the first protective layer and the second protective layer, the mounting holes being for fasteners to pass through.
In some embodiments, at least one side of the first protective layer and the second protective layer is provided with a mounting notch, and the mounting hole is disposed at the bottom of the mounting notch.
In certain embodiments, the first protective layer, the metal layer, and the second protective layer are connected by lamination or adhesion.
A battery pack according to an embodiment of the present utility model includes the separator of any of the above embodiments.
A vehicle of an embodiment of the utility model includes the battery pack of the above embodiment.
In above-mentioned battery package and vehicle, set up respectively in the first protective layer and the second protective layer of metal level both sides respectively including network structure and sealing member, the mesh of network structure is interior to be distributed with shear thickening fluid and sealing member sealed cladding network structure, can promote the shock resistance of backplate.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the present utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic diagram of a network structure according to an embodiment of the present utility model
FIG. 2 is a schematic view of the structure of a shield according to an embodiment of the present utility model;
FIG. 3 is an exploded schematic view of a shield according to an embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of a shield according to an embodiment of the present utility model;
fig. 5 is an exploded view showing the attachment of the cover plate to the battery pack according to the embodiment of the present utility model.
Reference numerals: the battery pack comprises a protective plate-100, a metal layer-10, a first protective layer-12, a second protective layer-13, a network structure-14, mesh holes-18, mounting holes-22, fasteners-24, mounting notches-26, a battery pack-28, a tray-30, a bottom plate-32, a frame-34, a battery accommodating cavity-36 and a battery pack-38.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The disclosure herein provides many different embodiments or examples for implementing different structures of the utility model. To simplify the present disclosure, components and arrangements of specific examples are described herein. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 to 5, a guard plate 100 according to an embodiment of the present utility model includes a metal layer 10, a first protective layer 12 and a second protective layer 13, the first protective layer 12 and the second protective layer 13 are disposed on two sides of the metal layer 10, respectively, the first protective layer 12 and the second protective layer 13 include a network structure 14 and a sealing member (not shown), respectively, the network structure 14 has a mesh 18, a shear thickening fluid is distributed in the mesh 18, and the sealing member seals and encapsulates the network structure 14 and the shear thickening fluid.
In the guard plate 100, the first protective layer 12 and the second protective layer 13 respectively disposed at two sides of the metal layer 10 respectively include a network structure 14 and a sealing member, the mesh 18 of the network structure 14 is distributed with a shear thickening fluid, and the sealing member seals and wraps the network structure 14, so as to improve the impact resistance of the guard plate 100. Meanwhile, when the protector plate 100 is used for the bottom of the battery pack 28, vibration deformation from the battery pack 28 can be resisted under the holding of the first protective layer 12, the second protective layer 13 and the metal layer 10.
Specifically, referring to fig. 1 and 4, the first protective layer 12 and the second protective layer 13 of the guard plate 100 are respectively disposed at two sides of the metal layer 10, and sandwich the metal layer 10, and the first protective layer 12 and the second protective layer 13 respectively include a network structure 14 and a sealing member, wherein the network structure 14 has a mesh 18, a shear thickening fluid is distributed in the mesh 18, and the sealing member seals and encapsulates the network structure 14 and the shear thickening fluid.
The shear thickening fluid (shear thickening fluid, STF) is a thixotropic sol consisting of dispersed phase particles and a liquid dispersion medium, with significant hydrogen bonding between the dispersed phase particles and the liquid dispersion medium. When fluid is subjected to high shear, its viscosity suddenly increases and even changes from liquid to solid or solid-like material; when the external force is removed, the liquid is quickly recovered, and the liquid is in reversible non-Newtonian fluid behavior. In this embodiment, the metal layer 10 provides a certain strength for the guard plate 100, and the shear thickening fluid is distributed in the mesh 18 of the network structure 14, so that when the guard plate 100 receives impact, the shear thickening fluid in the mesh 18 performs phase change energy absorption, and can absorb part of the impact force, thereby improving the impact resistance of the guard plate 100.
Specifically, one of the first protective layer 12 and the second protective layer 13, for example, the first protective layer 12, on both sides of the metal layer 10 may be disposed on one side of the metal layer 10 near the battery receiving cavity of the battery pack 28; another, e.g., second protective layer 13, may be disposed on a side of metal layer 10 remote from the battery receiving cavity of battery pack 28. At this time, the second protection layer 13 can effectively buffer the impact from the outside, and the first protection layer 12 can effectively buffer the vibration deformation compression from the battery pack 28, so that the impact resistance of the protection plate 100 is improved while the vibration deformation compression resistance is improved, and the safety of the battery pack 28 is improved.
In certain embodiments, the network structure 14 comprises a fibrous network structure. Specifically, the network structure 14 in the first protective layer 12 may be a fiber network structure, or the network structure 14 in the second protective layer 13 may be a fiber network structure, or the network structures 14 in the first protective layer 12 and the second protective layer 13 may be fiber network structures, respectively. The fiber network structure is understood here to be a network structure 14 whose body is made up of fibers. In this way, the strength of the first protective layer 12 and the second protective layer 13 can be improved.
In some embodiments, the network structure 14 comprises a multi-layered sub-network structure in a stacked arrangement. In this way, the strength of the first protective layer 12 and/or the second protective layer 13 can be improved.
In certain embodiments, the fibrous network structure comprises para-aramid fibers, high density polyethylene fibers, or polybenzoxazole fibers.
In this way, the strength of the first protective layer 12 and/or the second protective layer 13 can be improved.
Specifically, para-aramid fiber, high-density polyethylene fiber, or polybenzoxazole fiber has high strength, high modulus, impact resistance, and low density, is suitable for manufacturing the first protective layer 12 and/or the second protective layer 13, and can improve the strength of the protective plate 100.
Specifically, the network structure 14 may include a plurality of layers of sub-network structures arranged in a stacked manner, and the network structure 14 may be formed by stacking/laminating a plurality of layers of high-strength, high-modulus, impact-resistant and low-density fibers, such as para-aramid fibers, high-density polyethylene fibers, polybenzoxazole fibers, and the like. Such fibers are commonly used in the manufacture of soft protective garments, and the number of fiber layers in the manufacture of the panel 100 may be increased or decreased depending on such factors as impact strength that the panel 100 may actually encounter, in view of the impact environment in which it is subjected.
In certain embodiments, the seal comprises a solid organoborosiloxane polymer.
In this way, the protective performance of the protector plate 100 can be improved.
Specifically, the solid organoborosilicate polymer (Organoborosiloxane Polymer, BOS for short) is a novel organic-inorganic composite material, and is formed by polymerizing organoborosilicate monomers. It has the characteristics of high molecular weight, high crosslinking degree, high temperature stability, low dielectric constant, excellent mechanical property, excellent chemical stability, better corrosion resistance and the like. In this embodiment, the sealing member includes a solid organoborosiloxane polymer, so that the sealing member also has a corresponding protective performance, and the guard plate 100 has a better protective performance.
In certain embodiments, the seal comprises a shear thickening colloid.
In this way, the impact resistance of the guard plate 100 can be improved.
In particular, the shear thickening colloid comprises a shear thickening colloid (shear thickening gel, STG), which is a solid organoborosiloxane polymer. Normally, the material is soft polymer viscoelastic solid, and once the material is rapidly hit by the outside, the storage modulus and the strength of the material are instantaneously improved by several times, so that the material shows a hard solid property. When the external acting force disappears, the original soft state is restored. In this embodiment, the sealing member for sealing the covering network structure 14 and the shear thickening fluid is a shear thickening glue, on the one hand, the sealing member seals the covering network structure 14, so as to prevent the filler from falling off the network structure 14 to reduce the impact resistance of the guard plate 100; on the other hand, the shear thickening glue serves as a sealing member, and the strength of the first protective layer 12 and the second protective layer 13 can be improved.
In some embodiments, the first protective layer 12 composed of high-strength fibers, STF, STG is fabricated as follows: the method comprises the steps of immersing a high-strength fiber piece into STF diluent for a certain time, drying in an oven, immersing the obtained high-strength fiber piece/STF into a mixed solution of a polymer intermediate of STG and a vulcanizing agent, taking out and drying after a certain time, and vulcanizing at a high temperature. From the above preparation process, after the first soaking, the dispersed phase particles (containing part of the dispersion medium) in the STF are mainly distributed on the surface of the high-strength fiber, and after the second soaking, drying and subsequent vulcanization reaction, the STG covers the surface of the high-strength fiber/STF. Such a structure not only can isolate the STF from the outside air, but also can fill the gaps on the surface of the high-strength fiber, thereby ensuring the overall encapsulation of the first protective layer 12. Some special STGs also have self-repairing property, if tiny holes appear in the first protective layer 12, the STG surface layer will self-heal after a certain time, so that the sealing performance of the first protective layer 12 can be ensured. In addition, since the Shan Cedi protective layer 12 needs to have a certain thickness, besides the conventional lamination/lamination process, the single-layer fiber fabric can be prepared into the high-strength fiber/STF layer, and then the multi-layer semi-finished product of high-strength fiber/STF is uniformly soaked, dried and vulcanized to form a compact finished product of high-strength fiber/STF/STG. The second protective layer 13 made of high-strength fiber, STF, STG can be manufactured as described above.
It should be noted that when the protection board 100 encounters an impact, the glass fiber layer in the related art may first have irreversible dishing, deformation or cracking, which directly reduces the protection performance of the same area during the secondary impact. For the guard plate 100, the first protective layer 12 and/or the second protective layer 13 can buffer and absorb energy by utilizing self phase change preferentially when encountering impact of the same degree due to the shearing thickening performance of STF/STG which is strong when encountering strong, and the process is reversible after the impact is eliminated, so that the protective performance of the same region of the guard plate 100 is not obviously affected when encountering impact of two or more times.
In addition, in the embodiment of the present utility model, in order to improve the impact resistance of the protector plate 100, the metal layer 10 is added between the first and second protective layers 12 and 13, and the metal layer 10 and the first and second protective layers 12 and 13 may be fixed by a lamination or bonding process. The design of the metal layer 10 is selected and thickness matched to the strength of the first protective layer 12 to minimize the overall component weight while meeting the strength requirements. In order to realize that the protection plate 100 can resist the vibration deformation of the battery pack 28, and simultaneously avoid the additional stress caused by the weight of the metal layer 10 to the first protection layer 12 and the second protection layer 13, the protection plate 100 is ensured to be firmly assembled, the metal layer 10 needs to be extended to the fixing points of the two end fasteners 24, and the packaging on two sides still depends on the high-strength fiber/STF/STG composite material. In addition, since the fastener 24 may include STG rubber, the stress relaxation phenomenon is not negligible, and thus the design of the fastener 24 is emphasized here.
Based on the structure of the guard plate 100, when facing stone impact (namely stone or metal sharp object splashing impact) from the outside, the STF solution system in the network structure 14 at the lower side of the guard plate 100 is changed from liquid phase to solid phase, and STG is quickly hardened from a soft elastic state to form an impact protection layer, and a large amount of impact energy is absorbed in the STF/STG phase change process, so that the purposes of buffering and vibration reduction are achieved; when short-time bottom scraping impact (namely, scraping and rubbing of obstacles such as pavement stones) is encountered, high-strength fibers in the fiber network structure in the first protective layer 12 and/or the second protective layer 13 can convert energy absorbed by the impact into strain energy generated by stretching of the fibers, kinetic energy generated by moving the fibers towards an impact point and friction consumption, the addition of STF and STG can improve friction among the fibers, improve the impact resistance of the material, and increase the time and displacement of the impact head and the material, thereby improving total energy consumption; when encountering severe impacts such as long scraping, backing, etc. that exceed the resistance of the first protective layer 12 and/or the second protective layer 13, the high-strength metal layer 10 can exert its strong resistance effect, and the safety of the battery pack 28 is ensured to the greatest extent.
In some embodiments, the guard 100 is adapted to be disposed at the bottom of the battery pack 28, the battery pack 28 is provided with a battery receiving cavity 36, the first protective layer 12 is disposed on a side of the metal layer 10 adjacent to the battery receiving cavity 36, and the first protective layer 12 is bonded to the metal layer 10.
In this way, the battery pack 28 is facilitated to be protected.
Specifically, referring to fig. 5, the battery receiving cavity 36 of the battery pack 28 is configured to receive a battery pack 38, which is a portion of the battery pack 28 that requires significant protection. The backplate 100 sets up in battery package 28 bottom, and first protective layer 12 sets up in the side that metal layer 10 is close to battery accommodation cavity 36, and first protective layer 12 laminating with metal layer 10 can effectively protect battery package 28. The term "the first protective layer 12 is bonded to the metal layer 10" is understood to mean that the first protective layer 12 is stacked in direct contact with the metal layer 10.
In some embodiments, the guard plate 100 is adapted to be disposed at the bottom of the battery pack 28, the battery pack 28 is provided with a battery receiving cavity 36, the second protective layer 13 is disposed on a side of the metal layer 10 away from the battery receiving cavity 36, and the second protective layer 13 is attached to the metal layer 10. The term "the second protective layer 13 is bonded to the metal layer 10" is understood to mean that the second protective layer 13 is laminated in direct contact with the metal layer 10.
In this manner, external forces are effectively buffered and the battery pack 28 is effectively protected.
In certain embodiments, the thickness of the metal layer 10 is 0.5mm to 2.5mm; the thickness of the first protective layer 12 is 1 mm-3 mm; the thickness of the second protective layer 13 is 1mm to 3mm.
Thus, the protection effect can be ensured on the premise of controlling the whole volume and weight of the guard plate 100.
Specifically, referring to FIG. 4, in some embodiments, the thickness H of the metal layer 10 may be 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, or other values from 0.5mm to 2.5 mm. The thickness D1 of the first protective layer 12 may be 1mm, 1.5mm, 2.0mm, 2.5mm, 3mm, or other values from 1mm to 3mm. The thickness D2 of the second protective layer 13 may be 1mm, 1.5mm, 2.0mm, 2.5mm, 3mm or other values of 1mm to 3mm.
In some embodiments, the thermal conductivity of the first protective layer 12 and/or the second protective layer 13 is less than or equal to 0.12W/mK.
Thus, the guard plate 100 can perform a heat insulation function.
Specifically, the main component of the first protective layer 12 and/or the second protective layer 13 is high-strength fiber, and the thermal conductivity coefficient thereof is smaller (e.g. the thermal conductivity coefficient of kevlar fiber is 0.048W/m·k). The coefficient of thermal conductivity of the first protective layer 12 and/or the second protective layer 13 is less than or equal to 0.12W/m.K, which belongs to the category of heat insulation materials, so that the first protective layer 12 and/or the second protective layer 13 can also serve as a heat insulation layer to insulate and insulate the battery pack 28.
In some embodiments, the guard 100 is provided with mounting holes 22 through the metal layer 10, the first protective layer 12, and the second protective layer 13, the mounting holes 22 being for the fasteners 24 to pass through.
In this way, the shield 100 is facilitated to be fixed.
Specifically, referring to fig. 2-4, the guard plate 100 is provided with mounting holes 22 penetrating the metal layer 10, the first protective layer 12 and the second protective layer 13, and the mounting holes 22 are used for penetrating fasteners 24. In this manner, the fasteners 24 may fasten the first protective layer 12 and the second protective layer 13 to the metal layer 10, on the one hand, and the cover sheet 100 may be mounted to the tray 30 by the fasteners 24, on the other hand.
In some embodiments, at least one side of the first protective layer 12 and the second protective layer 13 is provided with a mounting notch 26, and the mounting hole 22 is disposed at the bottom of the mounting notch 26.
In this way, the mounting of the shield 100 is facilitated.
Specifically, referring to fig. 4, one side of the first protective layer 12 and the second protective layer 13 is provided with a mounting notch 26, and the mounting hole 22 is provided at the bottom of the mounting notch 26. In some embodiments, the first protective layer 12 and the second protective layer 13 are provided with mounting notches 26 at both sides, and the mounting holes 22 are provided at the bottoms of the mounting notches 26. In this manner, the mounting notches 26 provide the guard plate 100 with a relatively high differential height and a raised structure in the middle, and after the guard plate 100 is mounted to the battery pack 28, the raised structure in the middle of the guard plate 100 can provide a certain support to the battery pack 28.
In certain embodiments, the first protective layer 12, the metal layer 10, and the second protective layer 13 are connected by lamination or adhesion.
In this way, the first protective layer 12 and the second protective layer 13 can be stably connected to the metal layer 10.
Specifically, the metal layer 10 and the first protective layer 12 and the second protective layer 13 may be fixed by lamination or adhesion process. The design of the metal layer 10 is matched with the strength of the first protective layer 12 and the second protective layer 13, so that the weight of the whole part is reduced as much as possible on the premise of meeting the strength requirement.
In the related art shield 100, the shield 100 is mainly composed of 4 layers of materials of a foaming layer, a glass fiber upper layer, a metal layer 10, and a glass fiber lower layer. The foam layer mainly plays roles of buffering, absorbing energy, insulating heat and preserving heat, the glass fiber layer mainly plays a role of packaging, and the metal layer 10 is a main component for resisting external mechanical impact, and the mechanical strength of the metal layer directly determines the impact resistance of the guard plate 100. On this basis, in order to further improve the impact resistance and buffering performance of the guard plate 100, the embodiment of the utility model provides a novel guard plate 100 structural design of double-sided buffering which is strong when meeting strong, and the basic structure of the novel guard plate 100 is shown as the schematic diagrams in fig. 2, 3 and 4. The high-strength fiber/STF/STG composite material introduced by the guard plate 100 in the embodiment of the present utility model serves as the first protective layer 12 and the second protective layer 13, wherein the STF/STG is a material having a shear thickening non-newtonian fluid property, and the impact resistance of the fiber can be effectively improved after the material is attached to the high-strength fiber. In addition, under the holding of the metal layer 10, the first protective layer 12 and the second protective layer 13 can not only resist the impact of stone impact (i.e. stone or metal sharp object splash impact) from the outside, scraping the bottom (i.e. road surface stone and other obstacles, or even supporting the bottom (i.e. road surface blunt convex obstacles are extruded upwards in a large area), but also bear the vibration deformation compression from the battery pack 28, and can also insulate the battery pack 28 from heat and heat.
The guard plate 100 in the present embodiment has the following advantages:
1. impact strength is high: in some embodiments, to improve the impact resistance of the sheeting 100, a novel composite material having a structure of high strength fibers/STF/STG is introduced. The STF/STG has the non-Newtonian fluid property of shear thickening/shear hardening, and can absorb energy through self phase change under external impact. The novel guard plate 100 exhibits more excellent impact resistance when subjected to multiple impacts;
2. good creep resistance: in some embodiments, in order to avoid that the gravity of the metal layer 10 aggravates the creep phenomenon of polymers at both sides thereof, the metal layer 10 in the protection plate 100 is fixed by adopting a fixing mode of mechanical fixing mainly and lamination/bonding secondarily, and is fastened to the battery tray 30 together with the first protection layer 12 and the second protection layer 13 by bolts, and meanwhile, the metal layer 10 is fixed with the first protection layer 12 and the second protection layer 13 by adopting lamination/bonding;
3. the packaging property is good: in some embodiments, to ensure performance stability and encapsulation of the protective layer, the first protective layer 12 and the second protective layer 13 are omnidirectionally coated with STG. Because the STG colloid polymers interact with each other in a chemical bond mode, the property is stable. When combined with a composite material, STG can effectively prevent particles in the composite material from falling off the surface. In addition, when pinholes or other defects appear in the first protective layer 12 and the second protective layer 13, some special STGs can also perform self-repairing to ensure the packaging performance;
4. the vibration resistance is good: in some embodiments, the first protective layer 12 and the second protective layer 13 of the high-strength fiber/STF/STG on the side of the protective sheet 100 near the battery pack 28 are directly attached to the battery pack 28, and the first protective layer 12 and the second protective layer 13 are held against vibration deformation from the battery pack 28. In addition, the first protective layer 12 and the second protective layer 13 with certain thickness can also insulate heat and preserve heat at the bottom of the battery pack 28;
5. the thickness is thin: the thickness of the guard plate 100 in the embodiment of the present utility model can be thinner than that of the guard plate in the related art with the same impact strength, and the ground clearance of the battery pack 28 can be improved in practical use, thereby further reducing the probability of the battery pack 28 encountering stone impact, bottom scraping and bottom supporting impact and improving the safety of the vehicle.
In the embodiment of the present utility model, the first protective layer 12 on the upper side of the protective sheet 100 may be attached to the bottom of the battery pack 28 in actual assembly. Based on the analysis of the guard plate 100 to cope with external impact, considering that the battery pack 28 can generate vibration deformation with different degrees (the deformation degree depends on the driving path spectrum, the structural design of the battery pack 28, the number and the positions of the fixing points of the battery pack 28, and the like) in the driving process of the vehicle, the attached first protective layer 12 and second protective layer 13 can still resist compression stress from the battery pack 28 under different deformation degrees, so that the overall vibration resistance of the battery pack 28 is improved. In addition, the main components of the first protective layer 12 and the second protective layer 13 may be high-strength fibers, and the thermal conductivity coefficient is smaller (for example, the thermal conductivity coefficient of kevlar fibers is 0.048W/m·k), which belongs to the category of thermal insulation materials (the thermal conductivity coefficient is less than or equal to 0.12W/m·k), so the first protective layer 12 and the second protective layer 13 can also be used as thermal insulation layers to insulate and insulate the battery pack 28.
Further, in the related art, the thickness of the single glass fiber layer is about 1 to 3mm, the thickness of the metal layer 10 is about 0.5 to 2.5mm, and the thickness of the foaming layer is about 3 to 10mm. The foam layer with the largest thickness is usually made of a hard foam material, and has low compressibility. Compared with the protection plate, the protection plate 100 of the embodiment of the utility model only comprises the first protection layer 12, the second protection layer 13 and the metal layer 10, wherein one side of the first protection layer 12 or the second protection layer 13 can play roles of buffering, absorbing energy, insulating heat and preserving heat, and the structure is simpler. Therefore, the thickness of the guard plate 100 can be made thinner with the same impact strength, and the ground clearance of the battery pack 28 can be increased in practical use, so that the probability of the battery pack 28 encountering stone impact, floor scraping and floor supporting impact can be further reduced, and the safety of the vehicle can be improved.
A battery pack 28 according to an embodiment of the present utility model includes the protector plate 100 according to any of the above embodiments.
In the above-mentioned battery pack 28, the first protective layer 12 and the second protective layer 13 respectively disposed on two sides of the metal layer 10 respectively include the network structure 14 and the sealing member, the shear thickening fluid is distributed in the mesh 18 of the network structure 14, and the sealing member seals and wraps the network structure 14, so as to improve the impact resistance of the protection plate 100.
Specifically, the battery pack 28 includes a cover sheet 100, the cover sheet 100 including a metal layer 10, a first protective layer 12 and a second protective layer 13, the first protective layer 12 and the second protective layer 13 being disposed on opposite sides of the metal layer 10, respectively, at least one of the first protective layer 12 and the second protective layer 13 including a network structure 14 and a seal (not shown), the network structure 14 having a mesh 18, a shear thickening fluid being distributed within the mesh 18, the seal sealing around the network structure 14 and the shear thickening fluid.
In some embodiments, referring to fig. 5, the battery pack 28 includes a tray 30 and a battery pack 38 positioned in the tray 30, the tray 30 defining the battery receiving cavity 36 described above, the battery pack 38 being positioned in the battery receiving cavity 36. The protection plate 100 in the present embodiment is disposed at the bottom of the battery pack 28, the first protection layer 12 is disposed on one side of the metal layer 10 close to the battery accommodating cavity 36, and the first protection layer 12 is attached to the metal layer 10. It will be appreciated that the second protective layer 13 is disposed on the side of the metal layer 10 away from the battery receiving cavity 36, and the second protective layer 13 is attached to the metal layer 10, so that the battery pack 28 can be effectively protected. The tray 30 includes bottom plate 32 and frame 34, and frame 34 is connected to bottom plate 32, and frame 34 sets up around bottom plate 32, and bottom plate 32 can adopt aluminum plate to alleviate the weight of battery package 28 assembly, promote battery package 28 energy density, promote the duration. The shield 100 is removably mounted to the tray 30 by fasteners 24 passing through the mounting holes 22.
The vehicle of the embodiment of the utility model includes the battery pack 28 of the above embodiment.
In the above vehicle, the first protective layer 12 and the second protective layer 13 respectively disposed on two sides of the metal layer 10 respectively include the network structure 14 and the sealing member, the shear thickening fluid is distributed in the mesh 18 of the network structure 14, and the sealing member seals and wraps the network structure 14, so as to improve the impact resistance of the guard plate 100.
Specifically, the above-described vehicles include, but are not limited to, electric motor vehicles, hybrid vehicles, extended range electric motor vehicles, and the like. In one embodiment, the vehicle may be a passenger car.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. A fender, comprising:
a metal layer;
the first protective layer and the second protective layer are respectively arranged on two sides of the metal layer, the first protective layer and the second protective layer respectively comprise a network structure and a sealing piece, the network structure is provided with meshes, shear thickening fluid is distributed in the meshes, and the sealing piece is used for sealing and coating the network structure and the shear thickening fluid.
2. The sheeting of claim 1 wherein the network is a fibrous network.
3. The sheeting of claim 2 wherein the fibrous network structure comprises a stacked arrangement of layers of sub-fibrous network structures.
4. A sheeting according to claim 2 or claim 3, wherein the fibrous network comprises para-aramid, high density polyethylene or polybenzoxazole fibres.
5. The sheeting of claim 1, wherein the seal comprises a shear thickening gel.
6. The sheeting of claim 5, wherein the seal comprises a solid organoborosiloxane polymer.
7. The protective sheet of claim 1, wherein the protective sheet is adapted to be disposed at a bottom of a battery pack, the battery pack is provided with a battery receiving cavity, the first protective layer is disposed on a side of the metal layer adjacent to the battery receiving cavity, and the first protective layer is bonded to the metal layer.
8. The protective sheet of claim 1 or 7, wherein the protective sheet is adapted to be disposed at a bottom of a battery pack, the battery pack is provided with a battery receiving chamber, the second protective layer is disposed on a side of the metal layer remote from the battery receiving chamber, and the second protective layer is bonded to the metal layer.
9. The sheeting of claim 1 wherein the metal layer has a thickness of 0.5mm to 2.5mm; the thickness of the first protective layer is 1 mm-3 mm; the thickness of the second protective layer is 1 mm-3 mm.
10. The sheeting of claim 1 wherein the first protective layer and/or the second protective layer has a thermal conductivity of 0.12W/m-K or less.
11. The sheeting of claim 1, wherein the sheeting defines mounting holes extending through the metal layer, the first protective layer, and the second protective layer, the mounting holes being configured to receive fasteners.
12. The sheeting of claim 11, wherein at least one side of the first and second protective layers is provided with a mounting notch, and the mounting hole is disposed at a bottom of the mounting notch.
13. The sheeting of claim 1, wherein the first protective layer, the metal layer, and the second protective layer are joined by lamination or adhesion.
14. A battery pack comprising the separator of any one of claims 1 to 13.
15. A vehicle comprising the battery pack of claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321037328.1U CN220021408U (en) | 2023-04-28 | 2023-04-28 | Guard board, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321037328.1U CN220021408U (en) | 2023-04-28 | 2023-04-28 | Guard board, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220021408U true CN220021408U (en) | 2023-11-14 |
Family
ID=88674389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321037328.1U Active CN220021408U (en) | 2023-04-28 | 2023-04-28 | Guard board, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220021408U (en) |
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2023
- 2023-04-28 CN CN202321037328.1U patent/CN220021408U/en active Active
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