CN115275488A - Lower box body of battery pack - Google Patents
Lower box body of battery pack Download PDFInfo
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- CN115275488A CN115275488A CN202211018830.8A CN202211018830A CN115275488A CN 115275488 A CN115275488 A CN 115275488A CN 202211018830 A CN202211018830 A CN 202211018830A CN 115275488 A CN115275488 A CN 115275488A
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- Prior art keywords
- battery
- bearing
- battery pack
- battery module
- bearing support
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- 238000007789 sealing Methods 0.000 claims description 46
- 239000003292 glue Substances 0.000 claims description 8
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
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- 230000007774 longterm Effects 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004588 polyurethane sealant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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Classifications
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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
- 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
- H01M50/24—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 from their environment, e.g. from corrosion
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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
-
- 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)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to a battery is case down, specifically, the battery module passes through battery and wraps the case assembly in vehicle chassis down, and the battery wraps the case down and includes sealed apron and the bearing support that the components of a whole that can function independently set up, and the bearing support is used for connecting battery module and vehicle chassis to make the battery module pass through the bearing support and install in vehicle chassis, sealed apron and vehicle chassis assembly form sealed chamber, so that battery module and bearing support install in sealed intracavity. The application provides a battery is package box down with the structural strength who has strengthened battery package shell, avoids the problem that battery package energy density reduces simultaneously.
Description
Technical Field
The application relates to the field of electric automobiles, in particular to a lower box body of a battery pack.
Background
In the technical field of electric automobiles, a plurality of battery modules are usually directly placed in a cavity formed by a battery pack shell, and then the battery pack shell provided with the battery modules is installed at the bottom of an automobile body. However, the outer case of the battery pack is deformed by long-term pressure of the battery module, which affects the sealability of the outer case of the battery pack. In order to avoid deformation of the battery pack case, the structural strength of the battery pack case is generally increased, and the most important means is to increase the thickness of the battery pack case, so that although the structural strength of the battery pack case is increased, the weight of the whole battery pack is increased, and the energy density of the battery pack is reduced.
Disclosure of Invention
Therefore, the lower box body of the battery pack is needed to be provided so as to enhance the structural strength of the outer shell of the battery pack and avoid the problem of reduction of the energy density of the battery pack.
The battery module passes through the battery and wraps the box assembly in vehicle chassis down, and the box includes sealed apron and the bearing support that the components of a whole that can function independently set up under the battery package that this application provided, and the bearing support is used for connecting battery module and vehicle chassis to make the battery module pass through the bearing support and install in vehicle chassis, sealed apron and vehicle chassis assembly form sealed chamber, so that battery module and bearing support install in sealed intracavity.
In one embodiment, a plurality of connecting holes are formed in one end, close to the automobile chassis, of the bearing support, and the lower box body of the battery pack further comprises a fastener, wherein one end of the fastener is installed in the connecting holes, and the other end of the fastener is used for being connected with the automobile chassis. It can be understood that, by the arrangement, the assembly difficulty of the battery module and the automobile chassis is reduced.
In one embodiment, the load-bearing support comprises a plurality of first load-bearing beams arranged longitudinally and a plurality of second load-bearing beams arranged transversely, the first load-bearing beams and the second load-bearing beams are crossed with each other to form a plurality of assembling grooves arranged in a grid shape in a surrounding manner, and the assembling grooves are used for correspondingly assembling the battery modules. It can be understood that the processing difficulty of the assembly groove is reduced by the arrangement.
In one embodiment, the battery module is adhered to the inner wall of the mounting groove. It can be understood that, so set up, reduced the assembly degree of difficulty of battery module to be convenient for the batch production of box under the battery package, thereby improved the machining efficiency of box under the battery package.
In one embodiment, the battery module is adhered to the inner wall of the assembling groove through glue, and the shear strength a of the glue adhered to the battery module or the inner wall of the assembling groove meets the requirement that a is larger than or equal to 2Mpa. It can be understood that, by such an arrangement, the firmness of connection of the battery module and the assembly groove is enhanced, and the production cost is reduced.
In another embodiment, the battery module is adhered to the inner wall of the assembly groove through a double-sided adhesive tape, and the shear strength b of the double-sided adhesive tape adhered to the battery module or the inner wall of the assembly groove meets the requirement that b is more than or equal to 1.5MPa. It can be understood that, by doing so, the degree of firmness of the connection of the battery module with the assembly groove is enhanced.
In one embodiment, the first bearing beam is provided with a plurality of longitudinally distributed clamping grooves, and the second bearing beam sequentially penetrates through the corresponding clamping grooves on the plurality of first bearing beams and is clamped with the first bearing beams. It can be understood that, by the arrangement, the assembly difficulty of the bearing support is reduced, and the connection strength of the first bearing beam and the second bearing beam is improved.
In one embodiment, one end of the clamping groove, which is far away from the vehicle body chassis, is provided with a clamping interface, the second bearing beam is clamped in the clamping groove through the clamping interface, the inner wall of one side, which is far away from the clamping interface, of the clamping groove is in press contact with the upper portion of the second bearing beam, and the fastening piece is connected with the second bearing beam and the vehicle body chassis. It can be understood that, so set up, when having reduced the assembly degree of difficulty of bearing support, take place wearing and tearing when having avoided second spandrel girder and draw-in groove assembly, and then lead to the insecure problem of joint.
In one embodiment, the sealing cover plate comprises a bottom plate and a side plate, the side plate is connected to the periphery of the bottom plate and surrounds the bottom plate to form a buckling groove, and the sealing cover plate is arranged on the outer sides of the bearing support and the battery module through a buckling groove cover and surrounds the automobile chassis to form a sealing cavity. It will be appreciated that this is provided to facilitate sealing of the load bearing support and the battery module.
In one embodiment, the sealing cover plate is detachably connected with the automobile chassis through a side plate, and an elastic sealing piece is arranged on one side end face of the side plate close to the automobile chassis to be connected with the automobile chassis in a sealing mode. It can be understood that, with the adoption of the arrangement, the maintenance difficulty of the lower box body of the battery pack is reduced, and the sealing effect of the sealing cover plate is further improved.
In one embodiment, the end surface of the bottom plate close to one side of the bearing support is provided with a plurality of reinforcing ribs arranged longitudinally. It will be appreciated that this arrangement enhances the structural strength of the sealing cover plate.
In the battery package box down that this application provided, because the battery module passes through bearing support mounting in vehicle chassis to bearing support and sealed apron components of a whole that can function independently set up, consequently, sealed apron can play sealed effect, and, need not to carry out the bearing to the battery module through sealed apron, thereby avoided sealed apron to take place to warp or damage because of long-term atress, lead to the not tight problem of battery package box down. And box under the battery package that this application provided, because sealed apron need not play the bearing effect to reduced the structural strength demand to sealed apron, consequently, sealed apron can adopt the relative simple sheet metal of structure, thereby reduced the weight of whole battery package, and then improved the energy density of battery package. Further, compare in current battery package shell contain casing and lower casing, the casing is equipped with sealed apron only in one side of keeping away from vehicle body chassis under the battery package that this application provided, consequently, the battery package box structure is simple more and weight further descends under this application provides to the energy density of box under the battery package has further been improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery under-pack case according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of an embodiment of a load bearing support provided herein;
fig. 3 is a schematic structural view of a first load beam according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a sealing cover plate in an embodiment provided in the present application.
Reference numerals: 1. sealing the cover plate; 11. a base plate; 12. a side plate; 13. buckling the groove; 14. reinforcing ribs; 2. a load bearing support; 21. a first load beam; 211. a card slot; 211a, a card interface; 22. a second load-bearing beam; 23. assembling a groove; 3. connecting holes; 4. a fastener; 5. an elastomeric seal; 6. the chamber is sealed.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.
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 at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature or that the first feature is in indirect contact with the second feature via an intermediate medium. 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.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the technical field of electric automobiles, a plurality of battery modules are usually directly placed in a cavity formed by a battery pack shell, and then the battery pack shell provided with the battery modules is installed at the bottom of an automobile body. However, the outer case of the battery pack is deformed by long-term pressure of the battery module, which affects the sealability of the outer case of the battery pack. In order to avoid deformation of the battery pack case, the structural strength of the battery pack case is generally increased, and the most important means is to increase the thickness of the battery pack case, so that although the structural strength of the battery pack case is increased, the weight of the whole battery pack is increased, and the energy density of the battery pack is reduced.
Referring to fig. 1, in order to enhance the structural strength of the battery pack case and avoid the problem of the decrease of the energy density of the battery pack. The application provides box under battery package. Specifically, the battery module is assembled on the automobile chassis through the battery pack lower box body, the battery pack lower box body comprises a sealing cover plate 1 and a bearing support 2 which are arranged in a split mode, the bearing support 2 is used for connecting the battery module and the automobile chassis so that the battery module is installed on the automobile chassis through the bearing support 2, and the sealing cover plate 1 and the automobile chassis are assembled to form a sealing cavity 6 so that the battery module and the bearing support 2 are installed in the sealing cavity 6.
It should be noted that the term "separate installation" means that the load bearing bracket 2 is not connected to the sealing cover 1, that is, the weight of the battery module is not transmitted to the sealing cover 1 through the load bearing bracket 2.
Because the battery module passes through bearing support 2 and installs in vehicle chassis to bearing support 2 and the components of a whole that can function independently setting of sealed apron 1, consequently in the battery package box down that this application provided, sealed apron 1 can play sealed effect, and, need not to carry out the bearing through sealed apron 1 to the battery module, thereby avoided sealed apron 1 to take place to warp or damaged because of long-term atress, lead to the not tight problem of battery package box down. And the box under the battery package that this application provided, because sealed apron 1 need not play the bearing effect to reduced the structural strength demand to sealed apron 1, consequently, sealed apron 1 can adopt the relative simple sheet metal of structure, thereby reduced the weight of whole battery package, and then improved the energy density of battery package. Further, compare in current battery package shell contain casing and lower casing, the casing is equipped with sealed apron 1 only in one side of keeping away from vehicle body chassis under the battery package that this application provided, consequently, the battery package box structure is simpler and weight further descends under this application provides to the energy density of box under the battery package has further been improved.
To sum up, the battery package lower box that this application provided has strengthened the structural strength of battery package shell, has avoided the problem that battery package energy density reduces simultaneously.
In one embodiment, as shown in fig. 2, a plurality of connecting holes 3 are formed in one end of the load-bearing support 2 close to the automobile chassis, the lower box body of the battery pack further comprises a fastening piece 4, one end of the fastening piece 4 is arranged in the connecting hole 3, and the other end of the fastening piece 4 is used for being connected with the automobile chassis.
So, bearing support 2 passes through fastener 4 and can dismantle the connection in vehicle chassis, has reduced the assembly degree of difficulty of battery module and vehicle chassis.
Further, in one embodiment, the fastening member 4 comprises a plurality of bolts, one end of each bolt is connected to the chassis of the vehicle, and the other end of each bolt is in threaded fit with the connecting hole 3 on the load-bearing support 2. But not limited to, the fastening element 4 may also be a rivet, by which the load-bearing support 2 is connected to the chassis of the vehicle by means of a rivet or a press-rivet. The fastener 4 can also be a buckle, and the bearing bracket 2 is in clamping fit with the automobile chassis through the buckle.
Further, in one embodiment, as shown in fig. 2, the fastening members 4 are uniformly distributed on one side end surface of the load-bearing bracket 2 close to the chassis. Thus, the bearing bracket 2 is stressed more uniformly.
In one embodiment, as shown in fig. 2, the load-bearing support 2 includes a plurality of first beams 21 disposed longitudinally and a plurality of second beams 22 disposed transversely, the first beams 21 and the second beams 22 cross each other to form a plurality of assembling slots 23 arranged in a grid shape, and the assembling slots 23 are used for correspondingly installing the battery modules.
In this way, the number of the first bearing beam 21 and the second bearing beam 22 can be set according to practical requirements, and the required number of the assembly grooves 23 can be formed. Thereby reducing the difficulty of processing the fitting groove 23.
Further, the grid-shaped assembling grooves 23 are matched with the shape of the existing battery module, so that the battery module and the load-bearing support 2 are convenient to assemble.
In one embodiment, the battery module is adhered to the inner wall of the mounting groove 23.
Bond battery module in the assembly groove 23, need not to set up other connection structure on battery module or assembly groove 23 to the assembly degree of difficulty of battery module has been reduced. And the bonding process is simple, and the batch production of the lower box body of the battery pack is facilitated, so that the processing efficiency of the lower box body of the battery pack is improved.
Specifically, the battery module is adhered to the side wall of the assembly groove 23 formed by the first bearing beam 21 and the second bearing beam 22.
Further, in one embodiment, the battery module is adhered to the inner wall of the assembly groove 23 through glue, and the shear strength a of the glue adhered to the battery module or the inner wall of the assembly groove 23 meets the requirement that a is larger than or equal to 2Mpa. Wherein the glue is made of bi-component polyurethane. The two-component polyurethane sealant has good adhesiveness and low price, thereby enhancing the connection firmness of the battery module and the assembly groove 23 and reducing the production cost.
In another embodiment, the battery module is adhered to the inner wall of the assembly groove 23 through a double-sided adhesive tape, and the shear strength b of the double-sided adhesive tape adhered to the battery module or the inner wall of the assembly groove 23 meets the requirement that b is larger than or equal to 1.5MPa. Thus, the degree of firmness of the connection of the battery module with the assembly groove 23 is enhanced.
But not limited thereto, in an embodiment, the battery module may be welded to a side wall of the mounting groove 23 formed around the first and second bearing beams 21 and 22. Or the battery module is in clamping fit with the side wall of the assembling groove 23 formed by enclosing the first bearing beam 21 and the second bearing beam through a buckle.
In an embodiment, as shown in fig. 2 and 3, the first bearing beam 21 is provided with a plurality of longitudinally distributed locking grooves 211, and the second bearing beam 22 sequentially passes through the corresponding locking grooves 211 on the plurality of first bearing beams 21 and is locked with the first bearing beams 21.
Note that "corresponding card slot 211" means: the positions of the clamping grooves 211 on the first bearing beams 21 are correspondingly arranged, so that the same second bearing beam 22 can be clamped with the first bearing beams 21 through the correspondingly arranged clamping grooves 211.
Through setting up a plurality of vertically distributed draw-in grooves 211 at first spandrel girder 21 for second spandrel girder 22 passes corresponding draw-in grooves 211 on a plurality of first spandrel girders 21 in proper order and with first spandrel girder 21 joint, has reduced the assembly degree of difficulty of bearing support 2, and has improved the joint strength of first spandrel girder 21 and second spandrel girder 22.
Further, in an embodiment, as shown in fig. 3, the plurality of locking grooves 211 are uniformly distributed along the axial direction of the first bearing beam 21, so that a plurality of assembling grooves 23 with the same size and specification can be formed to facilitate the installation of the battery modules with the same specification. But not limited thereto, the plurality of locking grooves 211 may also be non-uniformly distributed along the axial direction of the first bearing beam 21.
Furthermore, in an embodiment, as shown in fig. 2 and fig. 3, an end of the clamping groove 211 facing away from the chassis has a clamping interface 211a, the second bearing beam 22 is clamped in the clamping groove 211 through the clamping interface 211a, an inner wall of a side of the clamping groove 211 away from the clamping interface 211a is pressed above the second bearing beam 22, and the fastener 4 connects the second bearing beam 22 and the chassis.
The fastener 4 connects the second bearing beam 22 and the chassis of the vehicle body, and the second bearing beam 22 bears the weight of the whole bearing support 2 and the battery module. Furthermore, the second spandrel girder 22 passes through joint interface 211a joint in draw-in groove 211, has reduced the assembly degree of difficulty of second spandrel girder 22, leads to draw-in groove 211 to take place wearing and tearing or warp when having avoided the assembly of second spandrel girder 22, and then leads to first spandrel girder 21 and the insecure problem of second spandrel girder 22 joint. Furthermore, the inner wall of one side of the clamping groove 211, which is far away from the clamping interface 211a, is pressed above the second bearing beam 22, so that the clamping of the first bearing beam 21 and the second bearing beam 22 under the action of gravity is tighter, and the connection firmness of the first bearing beam 21 and the second bearing beam 22 is further improved. Therefore, by the arrangement, the problem that clamping is not firm due to abrasion generated during assembly of the second bearing beam 22 and the clamping groove 211 is avoided while the assembly difficulty of the bearing support 2 is reduced.
Further, in order to make the force applied to the load bearing bracket 2 more uniform, in one embodiment, as shown in fig. 2, the fastening member 4 is uniformly disposed on the end surface of the second bearing beam 22 near the chassis of the vehicle.
But not limited thereto, the locking groove 211 on the first bearing beam 21 may be configured in other forms, in an embodiment, one end of the locking groove 211 close to the chassis has a locking interface 211a, the second bearing beam 22 is locked to the locking groove 211 through the locking interface 211a, the second bearing beam 22 is pressed against an inner wall of the locking groove 211 far from the locking interface 211a, and the fastener 4 connects the first bearing beam 21 and the chassis.
In an embodiment, as shown in fig. 4, the sealing cover plate 1 includes a bottom plate 11 and a side plate 12, the side plate 12 is connected to the periphery of the bottom plate 11 and surrounds the bottom plate 11 to form a fastening groove 13, and the sealing cover plate 1 covers the outer sides of the load-bearing bracket 2 and the battery module through the fastening groove 13 and surrounds the vehicle chassis to form the sealing cavity 6.
Through setting up lock groove 13 for sealed apron 1 encloses with vehicle chassis and establishes formation sealed chamber 6, thereby is convenient for sealed bearing support 2 and battery module.
Further, in one embodiment, the bottom plate 11 and the side plate 12 are integrally formed. But not limited thereto, the bottom plate 11 and the side plate 12 may be welded or snap-connected, which is not listed here.
Furthermore, in an embodiment, the bottom plate 11 and the side plate 12 are formed by stamping a layer of metal plate with uniform thickness, and since the sealing cover plate 1 is not bearing load, the thickness h of the sealing cover plate 1 can be set to be less than or equal to 1mm.
In one embodiment, as shown in fig. 4, the sealing cover plate 1 is detachably connected with the chassis of the automobile through a side plate 12, and an end face of the side plate 12 close to the bottom of the automobile is provided with an elastic sealing member 5 to be connected with the chassis of the automobile in a sealing manner.
When the bottom plate 11 at the bottom of the vehicle body is scratched by stones or other objects and damaged, only the sealing cover plate 1 needs to be detached for maintenance, so that the maintenance difficulty of the battery pack lower box body is greatly reduced. And by providing the elastic sealing member 5, the sealing effect of the sealing cover plate 1 is further improved.
Further, in an embodiment, the elastic sealing element 5 is a sealing foam made of a silica gel foam material, the sealing effect of the sealing foam is good, the buffering and the compression amount are good, and the sealing effect of the sealing cover plate 1 is further enhanced by locking the sealing foam through bolts.
In one embodiment, as shown in fig. 4, the bottom plate 11 has a plurality of ribs 14 disposed longitudinally on one side surface thereof adjacent to the load carrier 2. By providing the reinforcing ribs 14, the structural strength of the sealing cover plate 1 is enhanced.
Further, the sealing cover plate 1 and the reinforcing ribs 14 are of an integrally formed structure, and the forming mode is one of stamping forming, turning forming or casting forming.
The assembly process of the battery pack lower box provided by the application is explained as follows:
firstly, the second bearing beam 22 is installed in the corresponding clamping groove 211 on the first bearing beam 21 through the clamping interface 211a, so that the first bearing beam 21 and the second bearing beam 22 surround to form a plurality of assembling grooves 23. Then, the battery module is mounted in the mounting groove 23 and is adhered to the mounting groove 23 by glue or double-sided adhesive. Next, the assembly of the load carrier 2 and the battery module is mounted to the vehicle chassis by bolts provided on the second load beam 22. And finally, covering the sealing cover plate 1 on the outer side of the assembly body and connecting the assembly body with an automobile chassis through bolts.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. The utility model provides a box under battery package, its characterized in that, battery module passes through box under the battery package assembles in vehicle chassis, box under the battery package is including sealed apron (1) and bearing support (2) that the components of a whole that can function independently set up, bearing support (2) are used for connecting battery module and vehicle chassis to make battery module pass through bearing support (2) install in vehicle chassis, sealed apron (1) with vehicle chassis assembles and forms sealed chamber (6), so that battery module with bearing support (2) install in sealed chamber (6).
2. The battery pack lower box body according to claim 1, wherein one end of the bearing support (2) close to the automobile chassis is provided with a plurality of connecting holes (3), the battery pack lower box body further comprises a fastening piece (4), one end of the fastening piece (4) is arranged in the connecting holes (3), and the other end of the fastening piece (4) is used for being connected with the automobile chassis.
3. The battery pack lower box body according to claim 2, wherein the bearing support (2) comprises a plurality of first bearing beams (21) arranged longitudinally and a plurality of second bearing beams (22) arranged transversely, the first bearing beams (21) and the second bearing beams (22) are crossed with each other to form a plurality of assembling grooves (23) arranged in a grid shape, and the assembling grooves (23) are used for correspondingly assembling battery modules.
4. The lower case of battery pack according to claim 3, wherein the battery modules are adhered to the inner wall of the fitting groove (23).
5. The battery pack lower box body according to claim 4, wherein the battery modules are bonded to the inner wall of the assembly groove (23) through glue, and the shear strength a of the glue bonded with the battery modules or the inner wall of the assembly groove (23) meets the condition that a is more than or equal to 2Mpa;
and/or the battery module is bonded to the inner wall of the assembly groove (23) through a double-faced adhesive tape, and the shear strength b of the double-faced adhesive tape bonded with the battery module or the inner wall of the assembly groove (23) meets the requirement that b is more than or equal to 1.5Mpa.
6. The lower box body for the battery pack according to claim 3, wherein the first bearing beam (21) is provided with a plurality of longitudinally distributed clamping grooves (211), and the second bearing beam (22) sequentially penetrates through the corresponding clamping grooves (211) on the first bearing beam (21) and is clamped with the first bearing beam (21).
7. The battery pack lower case body according to claim 6, wherein a clamping interface (211 a) is arranged at one end, away from the vehicle body chassis, of the clamping groove (211), the second bearing beam (22) is clamped in the clamping groove (211) through the clamping interface (211 a), an inner wall of one side, away from the clamping interface (211 a), of the clamping groove (211) is in press-joint with the upper portion of the second bearing beam (22), and the fastening piece (4) is connected with the second bearing beam (22) and the vehicle body chassis.
8. The battery pack lower box body according to claim 2, wherein the sealing cover plate (1) comprises a bottom plate (11) and side plates (12), the side plates (12) are connected to the periphery of the bottom plate (11) and are arranged to surround the bottom plate (11) to form buckling grooves (13), and the sealing cover plate (1) is arranged on the outer sides of the bearing support (2) and the battery module through the buckling grooves (13) and is arranged to surround the automobile chassis to form the sealing cavity (6).
9. The battery pack lower box body according to claim 8, wherein the sealing cover plate (1) is detachably connected with the automobile chassis through the side plate (12), and an elastic sealing piece (5) is arranged on one side end face, close to the automobile chassis, of the side plate (12) to be in sealing connection with the automobile chassis.
10. The battery pack lower case body according to claim 8, wherein a plurality of reinforcing ribs (14) are longitudinally arranged on one side end face of the bottom plate (11) close to the bearing bracket (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211018830.8A CN115275488A (en) | 2022-08-24 | 2022-08-24 | Lower box body of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211018830.8A CN115275488A (en) | 2022-08-24 | 2022-08-24 | Lower box body of battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115275488A true CN115275488A (en) | 2022-11-01 |
Family
ID=83752120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211018830.8A Pending CN115275488A (en) | 2022-08-24 | 2022-08-24 | Lower box body of battery pack |
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| Country | Link |
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| CN (1) | CN115275488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024124635A1 (en) * | 2022-12-15 | 2024-06-20 | 湖北亿纬动力有限公司 | Battery pack, vehicle, and method for manufacturing battery pack |
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