CN113782900A - Battery can and method for manufacturing the same - Google Patents
Battery can and method for manufacturing the same Download PDFInfo
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- CN113782900A CN113782900A CN202110871018.9A CN202110871018A CN113782900A CN 113782900 A CN113782900 A CN 113782900A CN 202110871018 A CN202110871018 A CN 202110871018A CN 113782900 A CN113782900 A CN 113782900A
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
- H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
- H01M50/282—Lids or covers for the racks or secondary casings characterised by the material having a layered structure
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a battery case and a manufacturing method thereof, wherein the battery case comprises: the battery shell is provided with an accommodating cavity with an upward opening, and the battery is arranged in the accommodating cavity; the battery case cover is provided with a cutting opening and a cutting block, when the temperature is higher than the preset temperature, the cutting opening is opened by the cutting block, and when the temperature is lower than the preset temperature, the cutting opening is closed by the cutting block. According to the battery case provided by the embodiment of the invention, the battery case is light in weight, high in strength, easy to form, flame-retardant, heat-insulating, shock-absorbing and noise-reducing, intelligent temperature control can be realized while the battery case is light in weight, and a thermal management system can be further simplified.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a battery shell and a manufacturing method thereof.
Background
The battery is an important component of a new energy automobile, the weight of the battery is composed of a battery pack, a battery shell, a control system and the like, the problems of heavy weight and high energy consumption exist, and the battery becomes a great obstacle for improving the endurance mileage of the automobile. In order to meet the mileage requirement of a new energy automobile, the weight of the battery pack cannot be changed before a new high-power battery is released, so that the weight of the battery can be reduced only by the light weight of the battery shell and the optimization of a control system, and the aims of saving energy and reducing consumption are fulfilled. At present, the battery shell really achieves certain light weight effect, but only plays a role in structural safety, and cannot solve functional problems such as battery heat dissipation and the like.
The existing battery shell mainly adopts aluminum alloy or composite materials in order to realize the lightweight target, but the single material still has the problems of poor fatigue resistance, non-corrosion resistance, poor environmental adaptability and the like, and the concrete expression is as follows:
(1) the difficulty of thermal management is great. For metal materials such as aluminum alloy and the like, the heat conductivity is good, the internal heat of the battery pack cannot be effectively preserved under the condition of low external temperature, and a large amount of energy is consumed for preheating during starting; in the driving process, the battery dissipates heat violently, but the heat is difficult to effectively diffuse into the air in a heat conduction mode, and an additional heat dissipation device needs to be additionally arranged; and the composite material has poorer heat conductivity and higher heat dissipation requirement in the driving process.
(2) There are performance deficiencies. The vibration damping effect of metal battery shells such as aluminum alloy is poor, and the NVH performance of the vehicle needs to be improved by an additional vibration damping means; the composite material battery shell has poor damp-heat resistance and low rigidity, and the service life of a vehicle is possibly influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, one objective of the present invention is to provide a battery case, which has characteristics of light weight, high strength, easy forming, flame retardation, heat insulation, shock absorption, noise reduction, light weight, intelligent temperature control, and further simplification of a thermal management system.
Another object of the present invention is to provide a method for manufacturing a battery case, which can manufacture a battery case having light weight, high strength, easy molding, flame retardancy, heat insulation, vibration absorption, and noise reduction.
The battery case according to the embodiment of the first aspect of the invention, the battery case, is characterized by comprising: the battery shell is provided with an accommodating cavity with an upward opening, and the battery is arranged in the accommodating cavity; the battery case cover is provided with a cutting opening and a cutting block, when the temperature is higher than the preset temperature, the cutting opening is opened by the cutting block, and when the temperature is lower than the preset temperature, the cutting opening is closed by the cutting block.
According to the battery case disclosed by the embodiment of the first aspect of the invention, the battery is placed in the accommodating cavity of the battery case, the battery case is matched with the battery case cover to seal the battery in the accommodating cavity of the battery case, when the battery radiates heat in a working state, the physical state of the cutting block on the battery case cover is changed, and the cutting block expands to open the cutting opening after being heated, so that air convection is generated between the battery case and the outside, the heat radiated by the battery is radiated out through the cutting opening, the temperature of the battery can be effectively reduced, and the battery is prevented from being overheated; when the battery turned to the non-operating state by operating condition, the battery stopped giving off the heat, battery case also turned to the low temperature state by high temperature, the cutting block physical state on the battery case lid at this moment also changed, cutting opening is closed in the shrink of cutting block after the cooling, and then the battery in the protection battery case, even also can make the battery keep relatively higher temperature in chilly winter, avoid heating the battery and lose more energy because of when starting, and then promote the continuation of the journey mileage. The battery shell cover automatically adjusts the shape according to the temperature state of the battery pack, intelligent temperature control is achieved, optimization of a battery thermal management system is facilitated, the optimal working temperature range of the battery pack is further achieved, devices such as a fan, a control chip and a circuit do not need to be additionally installed, the thermal management system of the battery can be simplified, the battery weight is further reduced while the functional requirements are met, and energy saving and consumption reduction are achieved.
In addition, the battery case according to the present invention may have the following additional technical features:
further, the battery case cover comprises a metal layer plate and a composite layer plate, the composite layer plate is arranged between the two metal layer plates, or the metal layer plate is arranged on the outer side of the composite layer plate, and at least part of the battery case cover is cut to form the cutting opening and the cutting block.
Furthermore, the metal laminate and the composite laminate are provided with a plurality of layers, and the metal laminate and the composite laminate are
Further, a plurality of reinforcing ribs are formed on the battery case and/or the battery case cover, and the outer circumference of the cutting block at least partially surrounds the reinforcing ribs.
Further, at least one of the cutting opening and the cutting block is provided with an insulating rubber pad.
Further, still include: a battery frame including a frame main body and a frame support, the frame main body and the frame support constructing an assembly cavity, at least a portion of the battery housing being mounted in the assembly cavity.
Further, the cutting opening and the cutting block corresponding to the cutting opening are both plural on the battery case cover.
The present invention also provides a method of manufacturing the battery case having the above-described embodiment.
A manufacturing method of a battery case according to an embodiment of a second aspect of the invention, a manufacturing method for the battery case according to any one of claims 2 to 4, characterized by comprising:
pretreating the metal laminate;
bonding the pretreated metal layer plate with the composite layer plate by glue and then rolling to prepare a primary composite plate;
the primary composite board is matched with a die through a hot-pressing roller for hot pressing, and then the battery shell cover with the reinforcing ribs and the battery shell with the reinforcing ribs are respectively constructed;
and after cutting the cutting opening and the cutting block on the battery case cover, fixing the battery case cover on the battery case through a fastener.
According to the manufacturing method of the battery shell, the battery shell with the super-hybrid structure made of the aluminum-composite material is prepared by the manufacturing method, so that the battery shell has the characteristics of light weight, high strength, easiness in forming, flame retardance, heat insulation, shock absorption, noise reduction and the like, meanwhile, the shape can be automatically adjusted according to the temperature state of a battery pack, intelligent temperature control is realized, the optimization of a battery heat management system is facilitated, and a better light weight effect can be realized.
Further, the metal laminate is made of an aluminum alloy material, and the pretreatment of the metal laminate comprises: and forming a microporous structure on the surface of the metal laminate after alkaline washing and deoxidation.
Further, still include: the composite material is manufactured into a frame main body and a frame support through a pultrusion process, the frame main body and the frame support are fixed in a clamping and gluing mode to construct a battery frame, and at least part of the battery shell is installed in the battery frame.
Additional aspects and advantages of the invention 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 invention.
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 is a schematic structural view of a battery case cover of a battery case according to an embodiment of the present invention;
FIG. 2 is an enlarged view of region I of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a front view of FIG. 1;
FIG. 5 is a top view of FIG. 1;
FIG. 6 is a schematic diagram of the composition of a battery case cover of a battery case according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a battery frame of a battery case according to an embodiment of the present invention;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a left side view of FIG. 7;
fig. 10 is a schematic structural view of a pressing roller of a battery case according to an embodiment of the present invention;
FIG. 11 is a front view of FIG. 10;
FIG. 12 is a top view of FIG. 10;
fig. 13 is a schematic composition diagram of a battery case according to an embodiment of the present invention;
FIG. 14 is a front view of FIG. 13;
FIG. 15 is a top view of FIG. 13;
fig. 16 is a schematic view illustrating the process of a battery case and a pressing roller of a battery case according to an embodiment of the present invention;
FIG. 17 is a front view of FIG. 16;
FIG. 18 is a top view of FIG. 16;
FIG. 19 is a side view of FIG. 16;
fig. 20 is a schematic structural view of a battery case and a battery case cover of a battery case according to an embodiment of the present invention;
reference numerals: 100-battery case;
1-a battery case; 11-a containment chamber; 12-a frame body; 13-a frame support; 14-a battery frame; 15-assembly chamber;
2-a battery case cover; 21-cutting openings; 22-metal laminate; 23-composite laminate; 24-reinforcing ribs; 25-cutting the block;
3-pressing roller; 31-bump.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present 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 description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.
The battery case 100 according to the embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, 3 and 4, a battery case 100 according to an embodiment of the first aspect of the present invention, a battery case 100, includes: the battery pack comprises a battery shell 1 and a battery shell cover 2, wherein as shown in fig. 13, the battery shell 1 and the battery shell cover 2 are arranged in a matched manner, as shown in fig. 1 and fig. 2, an accommodating cavity 11 with an upward opening is formed in the battery shell 1, a battery is arranged in the accommodating cavity 11, and the accommodating cavity 11 matched with the battery is arranged in the battery shell 1 and used for installing and fixing a battery pack; as shown in fig. 1 and 2, the battery case cover 2 may be cut, and after the cutting, if the cut cutting block 25 is removed, the cut opening 21 may be formed on the battery case cover 2, and since the cutting block 25 is not completely cut off from the battery case cover 2, specifically as shown in fig. 1, the cutting block 25 may be rectangular, three sides of the cutting block 25 are cut, and the other side is not cut, so that the cutting block 25 may close the cut opening 21, and thus, the cut opening 21 and the cutting block 25 may be formed on the battery case cover 2.
From this, when being higher than when predetermineeing the temperature, cutting block 25 can be heated the inflation, and cutting opening 21 can be opened to cutting block 25 for battery case 1 forms the air flow with external intercommunication, and then gives off the heat in battery case 1 to the battery case 1 outside, and when being less than when predetermineeing the temperature, cutting block 25 contracts, and cutting opening 21 is sealed to cutting block 25, makes battery case 1 inside isolated with external, and the battery package can keep at stable temperature. Therefore, according to the above technical scheme of this application, can carry out optimal design on the selection material of battery case 100, can reduce the processing degree of difficulty of battery case 100 to a certain extent, can also make battery case 100 choose for use comparatively lightweight material to produce simultaneously to make battery case 100 lighter, in order to satisfy the demand.
According to the battery case 100 of the embodiment of the invention, the battery is placed in the accommodating cavity 11 of the battery case 1, the battery case 1 is matched with the battery case cover 2 to seal the battery in the accommodating cavity 11 of the battery case 1, when the battery radiates heat in a working state, the physical state of the cutting block 25 on the battery case cover 2 is changed, the cutting block 25 expands after being heated to open the cutting opening 21, so that air convection is generated between the battery case 1 and the outside, and further the heat radiated by the battery is radiated out through the cutting opening 21, the temperature of the battery can be effectively reduced, and the battery is prevented from being overheated; when the battery turns to the non-operating condition by operating condition, the battery stops giving off the heat, battery case 1 also turns to the low temperature state by high temperature, cutting block 25 physical state on the battery cap 2 at this moment also changes, cutting opening 21 is closed in the shrink of cutting block 25 after the cooling, and then the battery in protection battery case 1, even also can make the battery keep the temperature higher relatively in chilly winter, avoid heating the battery and losing more energy because of the start-up, and then promote the continuation of the journey mileage. The battery shell cover 2 automatically adjusts the shape according to the temperature state of the battery pack, intelligent temperature control is achieved, optimization of a battery heat management system is facilitated, the optimal working temperature range of the battery pack is further achieved, devices such as a fan, a control chip and a circuit do not need to be additionally installed, the battery heat management system can be simplified, the battery weight is further reduced while the functional requirements are met, and energy saving and consumption reduction are achieved.
As shown in fig. 1 and 6, in one example, the battery case cover 2 includes a metal laminate plate 22 and a composite laminate plate 23, the composite laminate plate 23 is disposed between the two metal laminate plates 22, and at least a portion of the battery case cover 2 is cut to configure a cut 21 and a cut block 25. That is to say, the battery case cover can be by metal laminate 22, compound plywood 23, the alternating structure of metal laminate 22 three-layer sandwich form constitutes, from this, take place to warp after the metal laminate 22 of inlayer is heated, and because the influence of compound plywood 23 for the metal laminate 25 that is located the skin is not taken place to warp or the volume that takes place to warp is less, from this, under the effect of the deformation power of the metal laminate 22 of inlayer, make the cutting piece 25 upwards warpage after being cut, thereby make the space inside and outside the battery case 100 communicate, and then make the heat in the battery case 100 distribute away from cutting opening 21, thereby can lower the temperature to the battery betterly. And after the temperature of the battery is reduced, the metal laminate plate 22 of the inner layer recovers deformation, so that the cutting block 22 recovers warping, that is, the cutting block 22 closes the cutting opening 21 again, thereby impurities such as dust and the like are not easy to enter the battery case 100, and a certain temperature is kept in the battery case 100, thereby being beneficial to the work of the battery.
In another example, the metal laminate 22 is provided on the outer side of the composite laminate 23, and at least a part of the battery case cover 2 is cut to construct the cut 21 and the cut block 25. It can be known in the same way that also can take place deformation when composite layer board 23 is inboard to be heated to make the cutting piece take place warping phenomenon, thereby make cutting opening 21 open, the heat distributes from the cutting opening, after the temperature of battery reduces, composite layer board 23 resumes deformation, makes cutting piece 22 resume the warpage, promptly, cutting piece 22 seals cutting opening 21 again.
Further, the battery case cover 2 adopts a structure of alternately arranging a plurality of layers of metal laminates 22 and composite laminates 23, the metal laminates 22 and the composite laminates 23 are bonded through structural adhesive, wherein the composite laminates 23 are arranged at one side close to the accommodating cavity 11 of the battery case 1, and the composite laminates 23 can also be arranged in an alternating structure of three layers of sandwich-shaped metal laminates 22, composite laminates 23 and metal laminates 22. The metal layer plate 22 can be one or more of ultra-high-strength steel, aluminum alloy or magnesium alloy, and preferably aluminum alloy; the metal layer plate 22 on the surface layer has better moisture resistance and heat resistance, and can protect the composite layer plate 23 inside; the composite laminate 23 has good damping and noise reduction effects, can solve the problem that the metal laminate 22 is poor in energy absorption performance, and has good synergistic effect.
As shown in fig. 5, a cutting opening 21 is cut on the surface of the battery case cover 2 by laser cutting, the cutting opening 21 includes a front end cutting opening 21 and a rear end cutting opening 21, wherein the front side edge and the left and right side edges of the front end cutting opening 21 are separated from the panel of the battery case cover 2, the rear side edge and the left and right side edges of the rear end cutting opening 21 are separated from the panel of the battery case cover 2, and the cutting opening 21 is a non-completely fixed composite plate structure. Because the metal layer plate 22 and the composite layer plate 23 have the thermal expansion coefficient difference which is nearly 10 times, when the battery pack works and releases heat, the metal layer plate 22 on the inner layer expands when being heated, and the outer layer plate is bent outwards due to the smaller expansion of the heat insulation effect of the composite layer plate 23, so that the cutting block 25 expands to open the cutting opening 21, air convection is formed between the inside of the battery shell 1 and the outside, the temperature of the battery is effectively reduced, and the battery is prevented from being overheated; and under the battery package non-operation state, cutting 21 is the closed state with battery shell 1, because composite layer board 23 has good heat-proof effect, can make the inside temperature that also keeps relatively higher in chilly winter of battery, avoids losing more energy because of need heating the battery when starting, and then promotes continuation of the journey mileage.
As shown in fig. 6, further, the metal layer plates 22 and the composite layer plates 23 are each provided with a plurality of layers, the metal layer plates 22 and the composite layer plates 23 are alternately arranged, and in one example, the composite layer plates 23 are provided with n layers, where n is an integer of 1 or more, and the metal layer plates 22 are provided with n +1 layers, whereby, when the composite layer plates 23 of the n layers and the metal layer plates 22 of the n +1 layers are alternately arranged, the innermost side and the outermost side of the battery case cover 2 are both the metal layer plates 22; in another example, the composite laminate sheet 23 is provided with n layers, and the metal laminate sheet 22 is provided with n layers, whereby when the n-layer composite laminate sheet 23 and the n-layer metal laminate sheet 22 are alternately arranged, the outermost side of the battery case cover 2 is the metal laminate sheet 22, and the innermost side is the composite laminate sheet 23. Reference may also be made specifically to the following analyses:
the battery cover 2 can be arranged into a multilayer alternating structure of a metal layer plate 22-a composite layer plate 23-a metal layer plate 22, when a vehicle runs, the battery pack works to release heat, and the metal layer plate 22 on the inner side expands when heated; because the thermal expansion coefficients of the metal layer plate 22 and the composite layer plate 23 are different by about 10 times, and the metal layer plate 22 at the outer side still keeps a lower temperature under the heat insulation effect of the composite layer plate 23, the cutting block 25 can be turned upwards, and air convection is formed between the inside of the battery shell 1 and the outside, so that the temperature of the battery can be effectively reduced, and the battery is prevented from being overheated; after the temperature drops, the cutting block 25 contracts to close the cutting opening 21 again, so that the battery pack pollution possibly caused by long-term opening of the battery shell 1 can be avoided. By arranging the layer spreading design of different layers of the metal layer plate 22 and the composite layer plate 23, the temperature of the cutting block 25 which is turned upwards is controlled, the critical temperature of the opening of the cutting opening 21 can be effectively controlled, and the effective temperature control of the battery is further realized.
The number of layers of the metal layer plates 22 and the composite layer plates 23 of the battery case cover 2 can be set according to actual requirements, and in addition, it can be understood that the metal layer plates 22 and the composite layer plates 23 with different numbers of layers can enable the cutting blocks 25 to have different warping degrees at the same temperature, so that the number of layers of the metal layer plates 22 and the composite layer plates 23 of the battery case cover 2 can be set according to actual heat dissipation requirements.
Further, as shown in fig. 1, a plurality of reinforcing ribs 24 are formed on the battery case 1 and/or the battery case cover 2, the outer circumference of the cutting block 25 at least partially surrounds the reinforcing ribs 24, a cut 21 is cut out on the surface of the battery case cover 2 by laser cutting, the cut 21 being a non-completely fixed composite plate structure, as shown in fig. 1, the reinforcing ribs 24 extend in the length direction of the battery case cover 2, the battery case cover 2 is cut at both ends of the reinforcing ribs 24, at positions spaced apart from the ends of the reinforcing ribs 24, therefore, the cutting block 25 is also provided with the reinforcing ribs 24, the extending direction of the reinforcing ribs 24 is vertical to the rotating axis of the cutting block 25, therefore, the cutting block 24 is not easy to be damaged when the buckling deformation occurs, and the cutting block 24 can have better reliability after the buckling deformation occurs or the buckling deformation is recovered.
In addition, as shown in fig. 1, two reinforcing ribs 24 may be provided on one cutting block 24, and the edge of the cutting block 24 may surround the end portions of the two reinforcing ribs 24 in a half-surrounded manner, but it is understood that the edge of the cutting block 24 may surround the end portions of three or more reinforcing ribs 24 in a half-surrounded manner, which is not limited herein and may be set according to actual requirements.
It should be noted that, as described above, the number of layers of the metal laminate sheets 21 and the composite laminate sheets 22 of the battery case cover 2 may be set so that the cutting blocks 25 have different warpage degrees at the same temperature, and for this, the number of the reinforcing ribs 24 included in the cutting blocks 23 may be different, and the number of warpage degrees of the cutting blocks 25 may be different at the same temperature. Thus, can pass
In some examples, when the battery pack is in different operating states and is in different temperature states, the temperature of the battery pack determines the expansion and contraction states of the cutting block 25, and further determines the opening and closing states of the cutting opening 21, when the different states are switched, in order to enhance the use strength of the cutting opening 21 and avoid deformation in different operating states, the reinforcing rib 24 is processed for the battery case cover 2 through a hot pressing mold, when the operating state of the battery pack releases heat, the metal layer plate 22 on the inner layer expands when heated, and outward bending occurs, so that the cutting opening 21 is opened by the expansion of the cutting block 25, the reinforcing rib 24 improves the working strength for the edge of the cutting opening 21 at the moment, and the edge of the cutting opening 21 is pushed open to the outside to deform when the cutting block 25 expands, thereby realizing the air convection between the inside of the battery case 1 and the outside on the premise of ensuring the stability of the battery case 1, the temperature of the battery is effectively reduced, and the battery is prevented from being overheated; when the battery pack is not in operation, the cutting block 25 contracts to enable the cutting opening 21 and the battery shell 1 to be in a closed state, at the moment, the reinforcing ribs 24 prevent the edge of the cutting opening 21 from contracting to deform inwards when the cutting block 25 contracts, and the composite laminated plate 23 has a good heat insulation effect, so that the inside of the battery can be kept at a relatively high temperature even in cold winter.
As shown in fig. 1, further, at least one of the cutting opening 21 and the cutting block 25 is provided with an insulating rubber mat, the cut opening 21 is covered by the divided edge with the insulating rubber mat, the insulating rubber mat can be natural rubber, butyl rubber, nitrile rubber, thermoplastic elastomer, etc., when the vehicle is in a stop state, the cutting opening 21 and the panel of the battery case cover 2 keep a closed state, and under the action of the insulating rubber mat, good heat preservation, waterproof and shock absorption effects can be achieved; meanwhile, under the action of the composite laminate 23, the heat insulation effect is good, the temperature inside the battery can be kept relatively high under the condition of low environmental temperature, the additional preheating of the battery during starting is reduced, the power consumption is reduced, and the endurance mileage is further improved.
As shown in fig. 7, 8 and 9, the method further includes: the battery frame 14, the battery frame 14 includes the frame main part 12 and the frame support 13, the frame main part 12 and the frame support 13 construct the assembly cavity 15, at least part of the battery housing 1 is installed in the assembly cavity 15. The frame main body 12 and the frame support 13 are both metal layer plates 22 and composite layer plates 23 which are alternately arranged and are manufactured by adopting a pultrusion process, the frame support 13 and the frame main body 1215 are connected into a whole in a gluing and clamping manner, the temperature in the battery shell 1 is increased or reduced in the switching process of the working state and the non-working state of the battery pack, the arrangement structure of the metal layer plates 22 and the composite layer plates 23 is good in stability and small in thermal deformation, the structural stability can be kept in the repeated temperature increasing and decreasing process of the battery, and the safety of the battery is improved; meanwhile, after the battery frame 14 is adopted, the thickness and the weight of the whole material of the battery shell 1 can be further reduced, the difficulty of a hot rolling process is reduced, the structure optimization design of the battery shell 1 is realized, and the whole weight of the battery shell 1 is further reduced; the frame main body 12 and the frame support 13 have simple structures, the adopted pultrusion process has low mould cost and high production efficiency, and the cost of parts can be further reduced; the battery frame 14 and the battery support are connected in a gluing and riveting mode, and the battery shell cover 2 and the battery support are connected in a screwing mode to jointly form a complete battery shell 1; the battery shell 1 is formed with a flange which is arranged to be attached to the upper surface of the battery frame 14, and the position of the battery shell cover 2 can be limited when the battery shell 1 is matched with the battery shell cover 2.
As shown in fig. 1, further, a plurality of cutting openings 21 and cutting blocks 25 corresponding to the cutting openings 21 are provided on the battery case cover 2. Cutting a cutting opening 21 on the surface of a battery shell cover 2 by laser cutting, wherein the cutting opening 21 is of a non-completely fixed composite plate structure, different heat dissipation efficiencies are achieved by arranging different numbers of cutting openings 21 and cutting blocks 25, because the metal layer plate 22 and the composite layer plate 23 have a thermal expansion coefficient difference which is nearly 10 times, when a battery pack works and releases heat, the metal layer plate 22 on the inner layer expands when being heated, and the outer layer plate can bend outwards due to smaller thermal insulation effect expansion of the composite layer plate 23, so that the cutting block 25 expands to open the cutting opening 21, as shown in figures 13, 14 and 15, air convection is formed between the inside of the battery shell 1 and the outside, the temperature of the battery is effectively reduced, the overheating of the battery is avoided, when the power of the battery pack is larger, the heat dissipation of the battery pack can be accelerated by arranging the plurality of cutting openings 21 and the cutting blocks 25, when the power of the battery pack is smaller, the battery pack can be radiated by adopting fewer cutting openings 21 and cutting blocks 25; under the battery package non-operation state, incision 21 is the enclosed state with battery shell 1, because composite layer board 23 has good heat-insulating effect, can make the inside temperature that also keeps relatively higher even in chilly winter of battery, avoids losing more energy because of need heating the battery when starting, and then promotes continuation of the journey mileage.
The present invention also provides a method of manufacturing the battery case 100 having the above-described embodiment.
The method of manufacturing the battery case 100 according to the embodiment of the second aspect of the present invention includes:
firstly, the metal layer plate 22 is pretreated, and secondly, the pretreated metal layer plate 22 and the composite layer plate 23 are glued and then rolled to manufacture a primary composite plate.
Here, the composite laminate 23 is a combination of a plurality of layers of fiber-reinforced composite prepregs, in which the reinforcing fibers may be carbon fibers, glass fibers, aramid fibers, basalt fibers, ultra-high molecular weight polyethylene fibers, etc., and preferably glass fibers having a relatively high cost performance; the matrix of the prepreg may be a thermoplastic resin or a thermosetting resin, and is preferably a thermoplastic resin which is more conveniently recycled; the multilayer prepreg is piled together according to different angles, and the angle of piling up is 0 ~ 180, and the number of piles is 2 ~ 20 layers.
The pretreated metal layer plate 22 and the composite layer plate 23 are bonded by glue and then rolled to form a primary composite plate, which specifically comprises: the metal layer plate 22 and the composite layer plate 23 can be provided with a plurality of layers, the plurality of layers of metal layer plates 22 and the composite layer plates 23 are alternately paved, the composite layer plate 23 is bonded with the processed metal layer plate 22 through an adhesive film to obtain the super-hybrid composite material, wherein the composite layer plate 23 is n layers, the metal layer plate 22 is n layers or n +1 layers, n is a natural number, the bonded plurality of layers of metal layer plates 22 and the composite layer plate 23 can be compacted through a press roller, and the structural strength of the primary composite material can be improved. .
Further, as shown in fig. 10, fig. 11 and fig. 12, after the primary composite board is hot-pressed by the hot-pressing roller 3 and the mold, the battery case cover 2 with the reinforcing ribs 24 and the battery case 1 with the reinforcing ribs 24 are respectively configured; compacting the super-hybrid composite material by a compression roller 3 to obtain a super-hybrid aluminum-plastic composite plate; after the super-hybrid aluminum-plastic composite board is preheated, as shown in fig. 16, 17, 18 and 19, the super-hybrid aluminum-plastic composite board is attached to a hot-pressing mold under the rolling action of a hot-pressing roller 3 to manufacture an untreated battery shell cover 2 and an untreated battery shell 1; the hot pressing roller 3 is a hot pressing roller 3 with a protrusion 31 structure, the width of the protrusion 31 structure is 10-100 mm, the height is 5-50 mm, the fillet is more than or equal to 200mm, the hot pressing mold is a mold with a groove, the groove corresponds to the protrusion 31 structure of the hot pressing roller 3, and a reinforcing rib 24 structure can be directly formed on the plane of the unprocessed battery shell cover 2 and the battery shell 1; in order to strengthen the use intensity of the cutting opening 21 and avoid deformation under different working states, the reinforcing ribs 24 are arranged at the processing part of the battery shell cover 2 through a hot pressing die, so that the working intensity of the edge of the cutting opening 21 is strengthened, and the working stability of the battery shell cover 2 is improved. When the working state of the battery pack releases heat, the metal layer plate 22 on the inner layer expands when heated and bends outwards, so that the cutting block 25 expands to open the cutting opening 21, the reinforcing ribs 24 improve the working strength of the edge of the cutting opening 21 at the moment, the edge of the cutting opening 21 is prevented from being pushed open to deform outwards when the cutting block 25 expands, and air convection between the inside of the battery shell 1 and the outside is realized on the premise of ensuring the stability of the battery shell 1, the temperature of the battery is effectively reduced, and the battery is prevented from being overheated; when the battery pack is not in operation, the cutting block 25 contracts to enable the cutting opening 21 and the battery shell 1 to be in a closed state, at the moment, the reinforcing ribs 24 prevent the edge of the cutting opening 21 from contracting to deform inwards when the cutting block 25 contracts, and the composite laminated plate 23 has a good heat insulation effect, so that the inside of the battery can be kept at a relatively high temperature even in cold winter.
After the cutting opening 21 and the cutting block 25 are cut on the battery shell cover 2, the battery shell cover 2 is fixed on the battery shell 1 through a fastener, and a battery is installed and fixed in the accommodating cavity 11 of the battery shell 1 through the matching of the battery shell 1 and the battery shell cover 2, so that a better heat dissipation condition is provided for the work of a battery pack.
As shown in fig. 16, according to the manufacturing method of the battery case of the embodiment of the second aspect of the present invention, the battery case 1 of the super-hybrid structure made of the aluminum-composite material is prepared by the manufacturing method, so that the battery case 1 has the characteristics of light weight, high strength, easy molding, flame retardance, heat insulation, shock absorption, noise reduction, and the like, and meanwhile, the shape can be automatically adjusted according to the temperature state of the battery pack, so that intelligent temperature control is realized, the optimization of a battery thermal management system is facilitated, and a better light weight effect can be realized.
As shown in fig. 6, further, the metal laminate 22 is made of an aluminum alloy material, and the pre-treatment of the metal laminate 22 includes: the metal laminate 22 is deoxidized by alkali washing and then forms a microporous structure on the surface, namely, the metal laminate 22 is firstly soaked in alkali liquor, the metal laminate 22 subjected to alkali washing is oxidized to generate aluminum oxide on the surface of the metal laminate 22 in an anodic oxidation mode, and the microporous structure is formed on the surface of the metal laminate 22 by alkali washing and deoxidation, so that the surface area is increased; through setting up the microporous construction for metal laminate 22, increase metal laminate 22 and hot-air's contact surface area, increase metal laminate 22's heat radiating area forms the air convection with the external world in battery case 1 is inside, effectively reduces the battery temperature, avoids the battery overheated.
As shown in fig. 7, 8 and 9, further, the method for manufacturing the cell casing 100 further includes: the composite material is respectively manufactured into a frame main body 12 and a frame support 13 through a pultrusion process, the frame main body 12 and the frame support 13 are fixed in a clamping and gluing mode to construct a battery frame 14, at least part of the battery shell 1 is installed in the battery frame 14, the composite material battery frame 14 is good in structural stability and small in thermal deformation, the structural stability can be kept in the process of repeatedly heating and cooling the battery, and the safety of the battery is improved; meanwhile, after the battery frame 14 is adopted, the thickness and the weight of the battery shell cover 2 and the battery shell 1 can be further reduced, the difficulty of a hot rolling process is reduced, the structure optimization design of the battery shell 1 is realized, and the overall weight of the battery shell 1 is further reduced; the frame main body 12 and the frame support 13 have simple structures, the adopted pultrusion process has low mould cost and high production efficiency, and the cost of parts can be further reduced; the battery frame 14 and the battery shell 1 are connected in a gluing and riveting mode, and the battery shell cover 2 and the battery shell 1 are connected in a screwing mode to jointly form the complete battery shell 1. By adopting the pultrusion battery frame 14 structure, the optimized design of the battery shell 1 can be realized, and the structural stability and the safety of the battery are considered while the weight is reduced.
In addition, for the battery frame 14 constructed by fixing the frame main body 12 and the frame supports 13 by clamping and gluing, as shown in fig. 7, as a specific example, the frame main body 12 may be formed into a hollow plate-shaped structure, two clamping grooves are respectively formed at two ends of the frame main body 12 in the length direction, the two clamping grooves are respectively formed at two ends of the frame main body 12 in the width direction, the two frame supports 13 are formed into a hollow profile structure, and the ends of the frame supports 13 may be clamped in the clamping grooves, so that the two ends of the two frame main bodies 12 in the length direction are clamped and connected by the two frame supports 13, that is, the two frame main bodies 12 are connected by the four frame supports 13, and a battery frame with an assembly cavity 15 may be constructed.
Other constructions and operations of the battery case 100 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "some embodiments," "optionally," "further," 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 do not necessarily 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery case (100), comprising:
the battery pack comprises a battery shell (1), wherein the battery shell (1) is provided with an accommodating cavity (11) with an upward opening, and a battery is arranged in the accommodating cavity (11);
the battery shell cover (2), be formed with cutting mouth (21) and cutting piece (25) on battery shell cover (2), when being higher than preset temperature, cutting piece (25) are opened cutting mouth (21), when being less than when preset temperature, cutting piece (25) seal cutting mouth (21).
2. The battery case (100) according to claim 1, wherein the battery case cover (2) comprises a metal laminate sheet (22) and a composite laminate sheet (23), the composite laminate sheet (23) being provided between two of the metal laminate sheets (22), or the metal laminate sheet (22) being provided on the outer side of the composite laminate sheet (23), at least a portion of the battery case cover (2) being cut to construct the cut opening (21) and the cutting block (25).
3. The battery can (100) according to claim 2, wherein the metal laminate sheet (22) and the composite laminate sheet (23) are each provided with a plurality of layers, and the metal laminate sheet (22) and the composite laminate sheet (23) are alternately arranged.
4. The battery case (100) according to claim 2, wherein a plurality of reinforcing ribs (24) are formed on the battery case (1) and/or the battery case cover (2), and the outer circumference of the cutting block (25) at least partially surrounds the reinforcing ribs (24).
5. The battery case (100) according to claim 1, wherein at least one of the cutting opening (21) and the cutting block (25) is provided with an insulating rubber gasket.
6. The battery case (100) according to claim 1, further comprising: a battery frame (14), the battery frame (14) comprising a frame main body (12) and a frame support (13), the frame main body (12) and the frame support (13) configuring a fitting cavity (15), at least part of the battery housing (1) being mounted within the fitting cavity (15).
7. Battery case (100) according to claim 1, characterized in that said cut (21) and said cutting block (25) corresponding to said cut (21) are each plural on said battery case cover (2).
8. A manufacturing method for the battery can of any one of claims 2 to 4, comprising:
pre-treating the metal laminate (22);
the pretreated metal layer plate (22) and the composite layer plate (23) are bonded by glue and then rolled to form a primary composite plate;
the primary composite plate is matched with a die through a hot-pressing roller (3) and is hot-pressed to respectively construct the battery shell cover (2) with reinforcing ribs (24) and the battery shell (1) with the reinforcing ribs (24);
after the battery shell cover (2) is cut into a cutting opening (21) and a cutting block (25), the battery shell cover (2) is fixed on the battery shell (1) through a fastening piece.
9. The manufacturing method according to claim 8, wherein the metal laminate (22) is composed of an aluminum alloy material, and the pretreatment of the metal laminate (22) includes: the metal laminate (22) forms a microporous structure on the surface thereof after being deoxidized by alkali washing.
10. The manufacturing method according to claim 8, further comprising:
the composite material is manufactured into a frame main body (12) and a frame support (13) through a pultrusion process, the frame main body (12) and the frame support (13) are fixed in a clamping and gluing mode to construct a battery frame (14), and at least part of the battery shell (1) is installed in the battery frame (14).
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