CN114851460A - Gradient elastic material, production mold and production method thereof, and square battery - Google Patents
Gradient elastic material, production mold and production method thereof, and square battery Download PDFInfo
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- CN114851460A CN114851460A CN202210442748.1A CN202210442748A CN114851460A CN 114851460 A CN114851460 A CN 114851460A CN 202210442748 A CN202210442748 A CN 202210442748A CN 114851460 A CN114851460 A CN 114851460A
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- 239000013013 elastic material Substances 0.000 title claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 238000010030 laminating Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 19
- 239000013536 elastomeric material Substances 0.000 claims description 14
- 238000005187 foaming Methods 0.000 claims description 14
- 230000000750 progressive effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 5
- 239000004964 aerogel Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000008961 swelling Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/48—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a gradual change elastic material, a production mold and a production method thereof and a square battery, wherein the gradual change elastic material production mold comprises the following steps: the first mold and the second mold are arranged oppositely, the surface of the first mold facing the second mold is a first surface, the surface of the second mold facing the first mold is a second surface, the first surface and the second surface form an expansion space, and the first mold and/or the second mold are/is provided with an inflation hole; the tough membrane, the tough membrane sets up first mould and/or the second mould is provided with the one side of aerifing the hole, the edge of tough membrane with be close to the tough membrane first mould or the laminating of second mould forms seal structure, aerify the hole be used for to let in gas in the seal structure, make the tough membrane form the orientation the bellying in inflation space. Therefore, the method can be used for producing the gradient elastic material with the same thickness and different density size distribution.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a gradual-change elastic material, a production mold and a production method thereof and a square battery.
Background
The buffer material is often arranged between the electric cores of the battery and used for absorbing the bulging deformation of the electric cores, and in addition, an insulating film, a heat insulation film and the like can be compounded to form a compound film layer with multiple functions. At present, the buffer material is generally a homogeneous material, the production process of the homogeneous material is realized through a plane die, and the produced product has a homogeneous characteristic, however, when the buffer material is applied to a battery, the middle deformation is large and the peripheral deformation is small when a battery core swells, so that the homogeneous material cannot well deal with the swelling of the battery core.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, one objective of the present invention is to provide a gradually-changing elastic material, a production mold and a production method thereof, and a square battery, wherein the production mold of the gradually-changing elastic material has a simple structure, and can be used for preparing the gradually-changing elastic material with uniform thickness and different density distribution, so that the gradually-changing elastic material is used as a buffer material between two adjacent battery cores, and the battery core swelling problem can be solved, thereby improving the safety performance of the battery.
In one aspect of the present invention, a progressive elastomeric material production mold is presented, comprising: the first mold and the second mold are arranged oppositely, the surface of the first mold facing the second mold is a first surface, the surface of the second mold facing the first mold is a second surface, the first surface and the second surface form an expansion space, and the first mold and/or the second mold are/is provided with an inflation hole; the tough membrane, the tough membrane sets up first mould and/or the second mould is provided with the one side of aerifing the hole, the edge of tough membrane with be close to the tough membrane first mould or the laminating of second mould forms seal structure, aerify the hole be used for to let in gas in the seal structure, make the tough membrane form the orientation the bellying in inflation space. Therefore, the toughness die forms a bulge through the inflation hole on the die, when liquid elastic material flows through the bulge, a local material-lacking area is formed above the bulge, a local material-lacking area is formed in the peripheral area of the bulge, foaming is continued, when the raw material becomes a semi-solid state, gas in the sealing structure is discharged, the toughness film is formed into a plane, foaming is continued, after the elastic material with uniform thickness is finally formed, the thicknesses of the material-lacking area and the material-lacking area are the same, but the material of the material-lacking area is few, the material of the material-lacking area is much, the elastic material finally formed by foaming can become gradually-changed elastic materials with different densities, when the gradually-changed elastic materials are used as buffer materials between two adjacent electric cores, the elastic change trend of the gradually-changed elastic materials can be adjusted according to the bulging condition of the electric cores, so that the electric cores are better protected, and the safety of the battery is improved.
According to some embodiments of the invention, the flexible film comprises a plurality of film units, the film units are arranged at intervals, and the edges of the film units are attached to the first mold or the second mold close to the flexible mold to form the sealing structure.
According to some embodiments of the invention, the two opposite tough films are configured, the film units on the two tough films are the same in size, the cross section of each convex part perpendicular to the first mold or the second mold is arc-shaped, the distance between every two adjacent convex parts in the length direction and/or the width direction of the gradual-change elastic material production mold is L, and L is greater than or equal to 2mm and less than or equal to 20 mm.
According to some embodiments of the invention, the membrane unit has a length a, and a satisfies: a is more than or equal to 140mm and less than or equal to 1400 mm; the width b of the membrane unit is more than or equal to 50mm and less than or equal to 250 mm.
According to some embodiments of the invention, a distance c from a highest point of the protrusion on the first surface to the first surface, and c satisfies 0.2mm ≦ c ≦ 5 mm; and/or the distance from the highest point of the convex part on the second surface to the second surface is d, and d is more than or equal to 0.2mm and less than or equal to 5 mm.
According to some embodiments of the invention, the distance e between the first surface and the second surface, and e satisfies 0.5mm ≦ e ≦ 8 mm.
In another aspect of the invention, a method for preparing a graded elastic material is provided. The method comprises the following steps: (1) introducing gas into the sealing structure of the gradual-change elastic material production die through the inflation hole, so that the tough film forms a bulge towards the direction of the expansion space; (2) adding a liquid elastic material into the expansion space; (3) after the liquid elastic material is converted into a semi-solid state, releasing gas in the sealing structure to enable the flexible film to become a plane, and continuously foaming; (4) and after the elastic material is foamed to a target thickness, removing the first mold and the second mold to obtain the gradual-change elastic material. Therefore, the gradual-change elastic material with different densities can be prepared, and when the gradual-change elastic material is used as a buffer material between two adjacent electric cores, the elastic change trend of the gradual-change elastic material can be adjusted according to the bulging condition of the electric cores, so that the electric cores are better protected, and the safety of the battery is improved.
In another aspect of the present invention, a graded elastic material is provided, which is obtained by the above-mentioned graded elastic material production mold and preparation method. Therefore, the elastic material is low in middle density and high in surrounding density, and can be used for more scenes.
According to some embodiments of the invention, the graduated elastic material comprises at least one of foam, rubber and aerogel blanket.
In a further aspect of the present invention, a square battery is provided, which includes a plurality of battery cells and a buffer material disposed between two adjacent battery cells, wherein the buffer material includes the above-mentioned gradient elastic material. Therefore, when the material is used as a buffer material between the battery cells, the elastic change trend of the gradual-change elastic material can be adjusted according to the swelling condition of the battery cells, so that the battery cells are protected better, and the safety of the battery is improved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic view of a progressive elastomeric material production mold according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a progressive elastomeric material production mold according to another embodiment of the present invention;
FIG. 3 shows a schematic view of a progressive elastomeric material production mold according to another embodiment of the present invention;
FIG. 4 shows a schematic view of a progressive elastomeric material production mold according to another embodiment of the present invention;
FIG. 5 shows a schematic structural view of a flexible membrane according to an embodiment of the invention;
FIG. 6 shows a schematic view of a progressive elastomeric material production mold according to one embodiment of the present invention;
FIG. 7 shows a close-up view of the dashed area of FIG. 2;
FIG. 8 shows a close-up view of the dashed area in FIG. 3;
FIG. 9 shows a schematic view of a progressive elastomeric material production mold according to one embodiment of the present invention;
fig. 10 shows a partial structural view of a battery pack.
Reference numerals:
100: a first mold; 10: an inflation hole; 200: a second mold; 300: a tough film; 310: a membrane unit; 1000, gradual change of elastic materials; 2000: and (5) battery cores.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
In one aspect of the present invention, a progressive elastomeric material production mold is presented, which, with reference to fig. 1, comprises a first mold 100, a second mold 200 and a ductile film 300 arranged in facing relationship. Wherein,
the surface of the first mold 100 facing the second mold 200 is a first surface, the surface of the second mold 200 facing the first mold 100 is a second surface, an expansion space is formed between the first surface and the second surface, and the first mold 100 and/or the second mold 200 is provided with an inflation hole 10. In particular, the inflation holes 10 may be provided on only one mold, for example, the inflation holes 10 may be provided on only the first mold 100 or the inflation holes 10 may be provided on only the second mold 200, preferably the inflation holes 10 are provided on both molds.
The flexible film 300 is arranged on one side of the first mold 100 and/or the second mold 200, which is provided with the inflation hole 10, the edge of the flexible film 300 is attached to the first mold 100 or the second mold 200, which is close to the flexible film 300, to form a sealing structure, and the inflation hole 10 is used for introducing gas into the sealing structure, so that the flexible film 300 forms a bulge facing the expansion space.
According to some embodiments of the present invention, when only one mold is provided with the inflation hole 10, for example, referring to fig. 1 and 2, the inflation hole 10 is provided only on the first mold 100, the flexible film 300 is provided on the side of the first mold 100 having the inflation hole 10, the edge of the flexible film 300 is attached to the first mold 100 to form the flexible film 300 with a peripheral seal, and the flexible film 300 is inflated through the inflation hole 10 into the sealed flexible film 300 to form the protrusion.
According to other embodiments of the present invention, referring to fig. 3, when only the second mold 200 is provided with the inflation hole 10, the flexible film 300 is disposed on the side of the second mold 200 having the inflation hole 10, the edge of the flexible film 300 is attached to the second mold 200 to form the flexible film 300 with a sealed periphery, and the flexible film 300 is inflated to form the protrusion by inflating the sealed flexible film 300 through the inflation hole 10.
According to other embodiments of the present invention, referring to fig. 4, when the first mold 100 and the second mold 200 are both provided with the inflation holes 10, two flexible films 300 may be disposed in the inflation space, the periphery of the flexible film 300 near the first mold 100 is attached to the first mold 100 to form a sealing structure, the periphery of the flexible film 300 near the second mold 200 is attached to the second mold 200 to form a sealing structure, and the inflation holes 10 are used to inflate the sealing structure, so that the upper flexible film 300 is inflated downward and the lower flexible film 300 is inflated upward.
According to the gradual-change elastic material production mold, due to the fact that the protrusions are arranged on the surface of the mold, when liquid elastic materials flow through the protrusions, a local material-lacking area is formed above the protrusions, a local material-lacking area is formed in the peripheral area of the protrusions, when the raw materials become semi-solid, gas in a sealing structure is discharged or a low pressure level is maintained, the flexible film 300 is made to be a plane and continuously foamed, the thickness of the material-lacking area and the thickness of the material-lacking area are the same as that of the material-lacking area after the elastic materials are finally formed, the material-lacking area is few, the material-lacking area is much, and the material-lacking area is much, so that the elastic materials formed through final foaming can become the gradual-change elastic materials 1000 with different densities. When the gradual-change elastic material 1000 is applied between the battery cores 2000 and used as a buffer material, if the gradual-change elastic material 1000 is extruded by external force, the area with low density can correspond to the area with large expansion deformation of the battery cores 2000, because the area with low density has high foaming level and poor elasticity, the gradual-change elastic material is deformed greatly when extruded by the external force, the reaction force is small, the area with high density can correspond to the area with small expansion deformation of the battery cores 2000, because the area with high density has low foaming level and good elasticity, the deformation when extruded by the external force is small, and the reaction force is large, therefore, the gradual-change elastic material 1000 disperses the reaction force to the battery cores 2000 when extruded by the external force through the difference in density, so that the stress of the battery cores 2000 is more uniform, and the safety of the battery is improved.
According to some embodiments of the present invention, referring to fig. 1 and 5, the ductile film 300 may include a plurality of film units 310 arranged at intervals, and edges of the film units 310 are fitted to the first mold 100 or the second mold 200 adjacent to the ductile film to form a sealing structure. Specifically, when toughness membrane 300 is close to first mould 100 and sets up, the laminating of membrane unit 310 all around and first mould 100 forms seal structure, when toughness membrane 300 is close to second mould 200 and sets up, the laminating of membrane unit 310 all around and second mould 200 forms seal structure, from this, accessible is aerifyd hole 10 and is let in gas in to each seal structure, it is protruding to make membrane unit 310 swell formation, the monoblock elastic material that final foaming formed includes a plurality of even thickness, the gradual change elastic material 1000 of density gradual change, can cut monoblock elastic material into the gradual change elastic material 1000 of a plurality of fritters and use, and the production efficiency is improved.
According to some embodiments of the present invention, referring to fig. 4 and 6, the flexible films 300 are configured as two opposite films, the film units 310 on the two flexible films 300 are the same in size, the protrusions are arc-shaped perpendicular to the cross section of the first mold 100 or the second mold 200, the distance between two adjacent protrusions in the length direction and/or the width direction of the production mold of the gradient elastic material 1000 is L, and L satisfies 2mm ≦ L ≦ 20 mm. Specifically, the first mold 100 and the second mold 200 are both provided with the inflation holes 10, the film units 310 close to the first mold 100 are inflated through the first mold 100, the film units 310 close to the second mold 200 are inflated through the second mold 200, so that the film units 310 on the two tough films 300 are all inflated towards the expansion space, and as the film units 310 on the two tough films 300 are the same in size and are opposite to each other, and the bulged cross sections formed after inflation are arc-shaped, an elastic material with uniform thickness and gradually changed density can be formed, and the gradually-changed elastic material 1000 correspondingly formed by each film unit 310 is the gradually-changed elastic material 1000 with uniform thickness, low middle density and high density at the periphery. The entire piece of graduated elastic material 1000 may be divided into a plurality of graduated materials of uniform thickness, low intermediate density, and high peripheral density by cutting along the gaps between adjacent protrusions.
According to some embodiments of the present invention, the position and number of the gas filling holes 10 are not particularly limited, for example, the gas filling holes 10 may be provided at the center of each sealing structure, or at the edge of the sealing structure, and in particular, those skilled in the art may set the size of the protrusion according to the actual process.
According to some embodiments of the invention, the pressure during inflation is not limited and can be adjusted by one skilled in the art based on the degree of bulging of the seal.
According to some embodiments of the present invention, referring to fig. 5, the length of the membrane unit 310 is a, and a may satisfy: a is more than or equal to 140mm and less than or equal to 1400 mm; the width b of the film unit 310 can satisfy that b is more than or equal to 50mm and less than or equal to 250 mm. Specifically, the graduated elastic material 1000 may be cut according to the application thereof, for example, when it is applied between the battery cell 2000 and the battery cell 2000 as a buffer material, the graduated elastic material 1000 may be cut into different sizes according to the size of the battery cell 2000.
According to some embodiments of the present invention, referring to FIGS. 2 and 7, a distance c from a highest point of the convex portion on the first surface to the first surface, and c satisfies 0.2mm ≦ c ≦ 5mm, and specifically, may be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, or 4.5mm, etc.; and/or referring to fig. 3 and 8, the distance from the highest point of the convex part on the second surface to the second surface is d, and d satisfies 0.2mm ≤ d ≤ 5mm, specifically, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, or 4.5mm, etc. It should be noted that the sizes of c and d may be the same or different, and those skilled in the art can design them according to actual needs.
According to some embodiments of the present invention, referring to FIG. 4, a distance e between the first surface and the second surface, and e satisfies 0.5mm ≦ e ≦ 8 mm. That is, the thickness of the finally-formed progressive elastic material 1000 may be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, or 7.5 mm.
In another aspect of the present invention, a method for preparing a graded elastic material 1000 is provided, comprising: (1) introducing gas into the sealing structure of the gradual-change elastic material 1000 production mold through the gas filling hole 10, so that the flexible film 300 forms a convex part facing the expansion space; (2) adding a liquid elastic material into the expansion space; (3) after the liquid elastic material is changed into a semi-solid state, gas in the sealing structure is discharged, so that the flexible film 300 is in a plane and continuously foams; (4) after the elastic material is foamed to a target thickness, the first mold 100 and the second mold 200 are removed to obtain the graded elastic material 1000. Specifically, the sealed structure is inflated through the inflation holes 10, so that the protrusions shown in fig. 2, 3 or 4 are formed on the mold, a liquid elastic material is added into the expansion space formed by the mold shown in fig. 2, 3 or 4, after the elastic material is transformed into a semi-solid state, the gas in the sealed structure is released, so that the flexible film is a plane (refer to fig. 9), the elastic material continuously foams in the expansion space formed between the first mold 100 and the second mold 200, and after the target thickness is reached, the first mold 100 and the second mold 200 can be removed, so that the gradient elastic material 1000 is obtained. Therefore, the flexible mold forms a bulge through the inflation hole 10 on the mold, when the liquid elastic material flows through the bulge, a local material-lacking area is formed above the bulge, a local material-lacking area is formed in the peripheral area of the bulge, the foaming is continued, when the raw material becomes a semi-solid state, the gas in the sealing structure is discharged, the flexible film 300 is flat, the foaming is continued, after the elastic material with uniform thickness is finally formed, the thicknesses of the material-lacking area and the material-lacking area are the same, but the material of the material-lacking area is less, the material of the material-lacking area is more, and the elastic material finally formed by foaming becomes the gradually-changed elastic material 1000 with different densities and sizes. When the material is used as a buffer material between the battery cells 2000, the elastic change trend of the gradient elastic material 1000 can be adjusted according to the swelling condition of the battery cells 2000, so that the battery cells 2000 are better protected, and the safety of the battery is improved.
According to some embodiments of the invention, the resilient material comprises at least one of foam, rubber and aerogel blanket.
In a further aspect of the present invention, a square battery is provided, which includes a plurality of battery cells 2000 and a buffer material disposed between two adjacent battery cells 2000, wherein the buffer material includes the above-mentioned gradient elastic material 1000. Specifically, referring to fig. 9, the gradient elastic material 1000 is placed between the electrical cores 2000, when the gradient elastic material 1000 is extruded by an external force, a central area with low density may correspond to an area with large expansion deformation of the electrical core 2000, because an area with low density has a high foaming level and poor elasticity, when extruded by an external force, the deformation is large, a reaction force is small, and a peripheral area with high density may correspond to an area with small expansion deformation of the electrical core 2000, because an area with high density has a low foaming level and good elasticity, when extruded by an external force, the deformation is small, and a reaction force is large, therefore, the gradient elastic material 1000 disperses the reaction force to the electrical core 2000 when extruded by an external force through a difference in density, so that the electrical core 2000 is stressed more uniformly, and the purpose of protecting the electrical core 2000 is achieved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A progressive elastomeric material production mold, comprising:
the first mold and the second mold are arranged oppositely, the surface of the first mold facing the second mold is a first surface, the surface of the second mold facing the first mold is a second surface, the first surface and the second surface form an expansion space, and the first mold and/or the second mold are/is provided with an inflation hole;
the tough membrane, the tough membrane sets up first mould and/or the second mould is provided with aerify one side of hole, the edge of tough membrane with be close to the tough membrane first mould or the laminating of second mould forms seal structure, aerify the hole be used for to let in gas in the seal structure, make the tough membrane form the orientation the bellying in inflation space.
2. The progressive elastomeric material production mold of claim 1, wherein the ductile film comprises a plurality of film units, the film units being spaced apart, edges of the film units engaging the first mold or the second mold adjacent to the ductile film to form the sealing structure.
3. The die for producing the gradually-changed elastic material as claimed in claim 2, wherein the two opposing films are formed by the tough films, the film units on the two tough films have the same size, the cross section of each protruding portion perpendicular to the first die or the second die is arc-shaped, the distance between the two adjacent protruding portions in the length direction and/or the width direction of the die for producing the gradually-changed elastic material is L, and L is 2mm or more and L is 20mm or less.
4. The progressive elastomeric material production mold of claim 2, wherein the film unit has a length a, and a satisfies: a is more than or equal to 140mm and less than or equal to 1400 mm;
the width b of the membrane unit is more than or equal to 50mm and less than or equal to 250 mm.
5. The progressive elastomeric material production mold of claim 3, wherein c is the distance c from the highest point of the protrusion on the first surface to the first surface, and c satisfies 0.2mm ≦ c ≦ 5 mm; and/or
The distance between the highest point of the convex part on the second surface and the second surface is d, and d is more than or equal to 0.2mm and less than or equal to 5 mm.
6. The progressive elastomeric material production mold of claim 4, wherein the distance e between said first surface and said second surface, and e satisfies 0.5mm ≦ e ≦ 8 mm.
7. A method of making a graded elastomeric material, comprising:
(1) introducing gas into the sealing structure of the gradual-change elastic material production mold according to any one of claims 1 to 6 through the gas filling holes, so that the tough film forms a bulge towards the expansion space;
(2) adding a liquid elastic material into the expansion space;
(3) after the liquid elastic material is converted into a semi-solid state, releasing gas in the sealing structure to enable the flexible film to become a plane, and continuously foaming;
(4) and after the elastic material is foamed to a target thickness, removing the first mold and the second mold to obtain the gradual-change elastic material.
8. A graded elastic material, characterized by being obtained by the method for producing a graded elastic material as recited in claim 7.
9. The graded elastic material of claim 8, wherein the graded elastic material comprises at least one of foam, rubber and aerogel blanket.
10. A square battery comprising a plurality of cells and a cushioning material disposed between adjacent cells, wherein the cushioning material comprises the graded elastic material of claim 8 or 9.
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| CN202210442748.1A CN114851460B (en) | 2022-04-25 | 2022-04-25 | Gradual change elastic material, production mold and production method thereof and square battery |
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| CN202210442748.1A CN114851460B (en) | 2022-04-25 | 2022-04-25 | Gradual change elastic material, production mold and production method thereof and square battery |
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| Publication number | Publication date |
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| CN114851460B (en) | 2023-06-20 |
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