CN114069144A - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN114069144A CN114069144A CN202111406188.6A CN202111406188A CN114069144A CN 114069144 A CN114069144 A CN 114069144A CN 202111406188 A CN202111406188 A CN 202111406188A CN 114069144 A CN114069144 A CN 114069144A
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- Prior art keywords
- mounting
- supporting plate
- plate
- battery
- battery pack
- Prior art date
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- 238000009434 installation Methods 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 32
- 238000003825 pressing Methods 0.000 claims description 22
- 239000003292 glue Substances 0.000 claims description 19
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000000853 adhesive Substances 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000003892 spreading Methods 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- H01M50/258—Modular batteries; Casings provided with means for assembling
-
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- 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
-
- 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
-
- 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
-
- 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
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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 invention discloses a battery pack, which comprises: a lower housing; the bottom supporting plate is arranged on the lower shell and comprises a fixed beam and a supporting plate, the fixed beam is connected with the supporting plate and positioned above the supporting plate, and the fixed beam and/or the supporting plate are/is detachably connected with the lower shell; and the battery module is bonded above the supporting plate. According to the battery pack, the battery module can be firstly adhered to the bottom supporting plate and then is installed on the lower shell together with the bottom supporting plate, and the bottom supporting plate is detachably connected with the lower shell, so that when the battery module and the FPC are in failure, the battery module in which the failure FPC and the failure battery cell are located can be maintained or replaced by detaching the battery module, the maintainability of the battery pack can be greatly improved, the maintenance cost and the maintenance efficiency are reduced, and meanwhile, the fault tolerance rate in the production process is also improved.
Description
Technical Field
The invention relates to the technical field of power battery manufacturing, in particular to a battery pack.
Background
Among the prior art, the casing of electricity core and battery package is mostly the fixed form of direct bonding, and when the electricity core isotructure in the battery package need be maintained, can't orientate the electric core of trouble and demolish, need to change the battery package wholly, lead to the maintenance cost to increase, maintenance efficiency is lower to fault-tolerant rate is lower in the production process, and the disability rate that leads to battery package in the production process is higher, and then leads to manufacturing cost's increase, exists the improvement space.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, it is an object of the present invention to provide a battery pack, in which battery modules are detachably mounted in a lower case through a bottom plate, maintenance costs are lower, maintenance efficiency is higher, and a fault-tolerant rate in a production process is higher.
The battery pack according to an embodiment of the present invention includes: a lower housing; the bottom supporting plate is arranged on the lower shell and comprises a fixed beam and a supporting plate, the fixed beam is connected with the supporting plate and positioned above the supporting plate, and the fixed beam and/or the supporting plate are/is detachably connected with the lower shell; and the battery module is bonded above the supporting plate.
According to the battery pack provided by the embodiment of the invention, the battery module can be firstly adhered to the bottom supporting plate and then is installed on the lower shell together with the bottom supporting plate, and the bottom supporting plate is detachably connected with the lower shell, so that when the battery module and the FPC are in failure, the battery module in which the failure FPC and the failure battery cell are located can be maintained or replaced by detaching the battery module, and therefore, the maintainability of the battery pack can be greatly improved, the maintenance cost and the maintenance efficiency are reduced, and meanwhile, the fault tolerance rate in the production process is also improved.
According to the battery pack provided by the embodiment of the invention, the supporting plate comprises a first supporting plate and a second supporting plate which are distributed in a parallel and spaced mode; the two ends of the fixed beam are respectively connected with the first supporting plate and the second supporting plate, and the two ends of the battery module are respectively supported on the first supporting plate and the second supporting plate.
According to the battery pack provided by the embodiment of the invention, at least one of the first supporting plate and the second supporting plate is provided with a concave spacing groove; the welding position of the end part of the battery module is opposite to the avoiding groove so as to be spaced from the first supporting plate or the second supporting plate, and a glue blocking piece is arranged at the edge of the avoiding groove.
According to the battery pack provided by the embodiment of the invention, the supporting plate is provided with the gluing limiting strip, and the gluing limiting strip is arranged at the edge of the supporting plate and is used for preventing the structural glue from overflowing.
According to the battery pack provided by the embodiment of the invention, the supporting plate is constructed into a profile structure with a hollow cavity, and the hollow cavity is internally provided with the supporting ribs which are inclined relative to the vertical direction.
According to the battery pack provided by the embodiment of the invention, the lower shell comprises a bottom plate, side frames and mounting longitudinal beams, wherein the side frames and the bottom plate define an upwardly open mounting cavity, the mounting longitudinal beams are longitudinally mounted in the mounting cavity, and the supporting plate is supported above the bottom plate; the fixed beam is arranged in the mounting cavity in a transversely extending mode and connected with the side frames and/or the mounting longitudinal beam.
According to the battery pack provided by the embodiment of the invention, the lower shell further comprises a first mounting cross beam, a second mounting cross beam and a third mounting cross beam which are spaced apart from each other, and the first mounting cross beam and the second mounting cross beam are spaced apart from each other and distributed at two ends of the mounting longitudinal beam; the mounting cavity is divided into a first mounting area between the first mounting cross beam and the second mounting cross beam and a second mounting area between the second mounting cross beam and the third mounting cross beam, the bottom support plate comprises a middle bottom support plate and an end bottom support plate, the middle bottom support plate is located in the first mounting area, and the end bottom support plate is located in the second mounting area.
According to the battery pack provided by the embodiment of the invention, in the middle bottom supporting plate, the fixed beam is positioned in the middle position of the supporting plate along the length direction, a group of battery modules are respectively installed on two sides of the fixed beam, two ends of the fixed beam are respectively detachably connected with the installation longitudinal beam and the side frame, and the supporting plate is detachably connected with the bottom plate; the top of the battery module in the first installation area is provided with a first cooling plate, and module pressing strips are connected above the first cooling plate and the installation longitudinal beams.
According to the battery pack provided by the embodiment of the invention, in the end bottom supporting plate, the fixed beam is positioned at the end part of the supporting plate along the length direction so as to be arranged opposite to the third mounting cross beam, a group of battery modules is arranged between the fixed beam and the third mounting cross beam, and two ends of the fixed beam are respectively detachably connected with two oppositely distributed side walls of the side frames.
According to the battery pack provided by the embodiment of the invention, two layers of battery modules are arranged in the second installation area, a second cooling plate is arranged between the two layers of battery modules, and a detachable module pressing plate is arranged at the top of the upper layer of battery module.
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 bottom tray of a battery pack according to an embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is a schematic structural view of a lower case of a battery pack according to an embodiment of the present invention;
fig. 4 is an assembly view of a bottom bracket plate and a lower case of a battery pack according to an embodiment of the present invention;
fig. 5 is an assembly view of a bottom bracket plate, a lower case, and a battery module of the battery pack according to the embodiment of the present invention;
FIG. 6 is an enlarged view at B in FIG. 5;
fig. 7 is a schematic structural view of a battery pack according to an embodiment of the present invention;
FIG. 8 is an enlarged view at C in FIG. 7;
fig. 9 is a sectional view of a battery pack according to an embodiment of the present invention;
fig. 10 is an assembly view of a bottom bracket plate, a first cooling plate, and a battery module of a battery pack according to an embodiment of the present invention;
fig. 11 is a top view of a battery pack (without a cooling plate) according to an embodiment of the invention;
fig. 12 is a sectional view (another direction) of a battery pack according to an embodiment of the present invention;
fig. 13 is a plan view of a battery pack according to an embodiment of the present invention
Fig. 14 is an enlarged view at D in fig. 13.
Reference numerals:
the battery pack 100 is provided with a battery pack,
the lower shell 1, the bottom plate 11, the side frames 12, the mounting longitudinal beams 13, the first mounting cross beam 141, the second mounting cross beam 142, the third mounting cross beam 143, the supporting foam 15, the first mounting area 161, the second mounting area 162,
the bottom supporting plate 2, the fixed beam 21, the hoisting hole 211, the positioning pin 212, the supporting plate 22, the first supporting plate 221, the second supporting plate 222, the avoiding groove 231, the glue blocking piece 232, the glue coating limiting strip 233, the middle bottom supporting plate 2a, the end bottom supporting plate 2b,
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.
Referring to fig. 1 to 12, a battery pack 100 according to an embodiment of the present invention is described, in which a battery module 31 of the battery pack 100 may be first adhered to a bottom support plate 2, and then installed together with the bottom support plate 2 in a lower housing 1, and the bottom support plate 2 is detachably connected to the lower housing 1, so that when the battery module 31 and an FPC (flexible circuit board) fail, the battery module 31 may be removed and the failed FPC (flexible circuit board) and the battery module 31 where a failed battery cell is located may be repaired or replaced, thereby greatly improving maintainability of the battery pack 100, and reducing maintenance cost and maintenance efficiency. Meanwhile, the fault tolerance rate in the production process is also improved.
As shown in fig. 1 to 12, a battery pack 100 according to an embodiment of the present invention includes: a lower case 1, a bottom plate 2, and a battery module 31.
Wherein, lower casing 1 is constructed as frame construction, and as shown in fig. 2, lower casing 1 limits the installation cavity that opens upwards, and when actually installing, can install bottom plate 2 in the installation cavity of lower casing 1 to make bottom plate 2 and lower casing 1 be in the relatively stable state, wherein, bottom plate 2 links to each other for detachably with lower casing 1, so that bottom plate 2 not only can install to the installation cavity, also can follow the installation cavity and tear out in a flexible way.
The bottom bracket 2 includes a fixed beam 21 and a bracket 22, as shown in fig. 3, the bracket 22 is configured as a flat plate, that is, the bracket 22 forms a supporting plane, wherein the bracket 22 is fixedly connected with the fixed beam 21, for example, the fixed beam 21 is detachably connected with the bracket 22 through a connecting member, or the fixed beam 21 is connected with the bracket 22 by welding, so that the fixed beam 21 and the bracket 22 are connected as a whole. And as shown in fig. 1, the fixed beam 21 is located above the supporting plate 22, i.e. the lower side edge of the fixed beam 21 can be connected with the upper surface of the supporting plate 22 by welding. Wherein, the supporting plate 22 may be provided in one, two or more, and when the supporting plate 22 is provided in more than two, each supporting plate 22 is connected to the fixed beam 21.
And when specifically installing, can link to each other fixed beam 21 and lower casing 1 detachably, also can link to each other layer board 22 and lower casing 1 detachably, perhaps link to each other both with lower casing 1 detachably to make bottom bracket board 2 can follow and dismantle in a flexible way on lower casing 1. Battery module 31 installs in bottom plate 2, and installs in casing 1 down with bottom plate 2 jointly, and can bond battery module 31 in the supporting plane of layer board 22, can scribble the structure on the supporting plane and glue, glues the laminating with battery module 31's bottom and structure again to make battery module 31 bond and be fixed in on layer board 22, guarantee that battery module 31's bottom is held effectively, guarantee battery module 31's installation stability.
Therefore, the battery module 31 in the invention is installed and fixed by adopting a split type shell structure, and is fixed on the lower shell 1 by adopting an installation mode of firstly adhering and then detachably connecting during specific installation, so that the battery module is beneficial to directional removal during the failure of the battery core, namely, the vehicle can be ensured to continue to operate by independently replacing the battery core during the failure of the battery core, and the replacement cost is reduced.
According to the battery pack 100 of the embodiment of the invention, the battery module 31 can be firstly adhered to the bottom supporting plate 2, then the bottom supporting plate and the bottom supporting plate 2 are jointly installed on the lower shell 1, and the bottom supporting plate 2 and the lower shell 1 are detachably connected, so that when the battery module 31 and the FPC are in failure, the battery module 31 in which the failure FPC and the failure battery cell are located can be maintained or replaced by detaching the battery module 31, thereby greatly improving the maintainability of the battery pack 100, reducing the maintenance cost and the maintenance efficiency, and simultaneously improving the fault tolerance rate in the production process.
In some embodiments, as shown in fig. 1, the supporting plate 22 includes a first supporting plate 221 and a second supporting plate 222, the first supporting plate 221 and the second supporting plate 222 are distributed in parallel and spaced apart, and when the first supporting plate 221 and the second supporting plate 222 are designed specifically, the width and the length of the first supporting plate 221 and the length of the second supporting plate 222 can be set to be the same, so that the difficulty in forming the two supporting plates is reduced, and the supporting plates have the same supporting plane and more consistent structural strength.
The two ends of the fixed beam 21 are respectively connected to the first supporting plate 221 and the second supporting plate 222, as shown in fig. 1, the first supporting plate 221 and the second supporting plate 222 are spaced apart in parallel and both are distributed in parallel with the horizontal plane, one end of the fixed beam 21 is connected to the upper surface of the first supporting plate 221 in a welded manner, the other end of the fixed beam 21 is connected to the upper surface of the second supporting plate 222 in a welded manner, and the middle area of the fixed beam 21 is arranged in a suspended manner. That is, the fixing beam 21 may be used to connect the first and second blades 221 and 222 so that the first and second blades 221 and 222 may be detached and installed together.
The two ends of the battery module 31 are respectively supported by the first supporting plate 221 and the second supporting plate 222, for example, when the battery module 31 is specifically installed, the battery module 31 and the bottom supporting plate 2 are bonded together through the structural adhesive, and the head and the tail of the battery module 31 are respectively bonded and fixed with the supporting planes of the first supporting plate 221 and the second supporting plate 222, so that most of the area of the bottom of the battery module 31 is ensured to be in a supported state, and the installation stability of the battery module 31 is improved.
In some embodiments, at least one of the first support plate 221 and the second support plate 222 is provided with a recessed avoidance groove 231, that is, the first support plate 221 may be provided with the avoidance groove 231, the second support plate 222 may also be provided with the avoidance groove 231, or both of them are provided with the avoidance groove 231, so that the welding position of the end portion of the battery module 31 is directly opposite to the avoidance groove 231, thus, after the installation of the battery module 31 is implemented, the cell casing is particularly directly opposite to the avoidance groove at the weld seam of the cell top cover and the cell sidewall, so that the weld seam position is staggered from the first support plate 221 or the second support plate 222, and the welding position is prevented from being cracked due to an excessive stress at the weld seam position.
It can be understood that the bottom support plate 2 is located at the cell casing and bonded together, and transmits the impact force to the cell casing after the support plate 22 is deformed by the force, but the first support plate 221 or the second support plate 222 can be effectively prevented from rigidly impacting the welding seam position by the arrangement of the avoiding groove, so that the safety of the battery module 31 is improved.
As shown in fig. 1 and fig. 2, the edge of the avoiding groove 231 is provided with a glue blocking member 232, wherein the avoiding groove 231 extends along the length direction of the supporting plate 22, and the glue blocking member 232 is also configured to extend along the length direction of the avoiding groove 231, that is, each position of the glue blocking member 232 in the length direction of the avoiding groove 231 plays a role of blocking glue, so as to prevent the structural glue from entering the avoiding groove 231 to form a supporting point. Wherein, keep off gluey piece 232 can be constructed for keeping off the gluey bubble cotton, and keep off the cotton lower side of gluey bubble and install to keeping away in the groove 231 in order to realize sheltering from the construction adhesive, and then be used for cutting off the transmission of power.
In some embodiments, the supporting plate 22 is provided with the glue-spreading limiting strips 233, the glue-spreading limiting strips 233 are disposed at the edges of the supporting plate 22 and are used for blocking the overflow of the structural glue, that is, the structural glue can be prevented from overflowing to the outer side of the supporting plate 22 by disposing the glue-spreading limiting strips 233, wherein the first supporting plate 221 and the second supporting plate 222 can both be provided with the glue-spreading limiting strips 233, and each supporting plate 22 is provided with two glue-spreading limiting strips 233, and the two glue-spreading limiting strips 233 are respectively disposed at the edges of two sides of the supporting plate 22, so that the structural glue can be prevented from overflowing from the edges of two sides of the supporting plate 22.
And after the battery module 31 is put into the box, the gluing area and the gluing thickness are ensured by adopting the matching form of the glue pressing tool and the gluing limiting strip 233, and the installation stability of the battery module 31 is ensured. When the battery pack 100 receives impact from the bottom, the energy absorption is performed by using the deformation of the supporting foam 15, so that the impact force borne by the battery module 31 is reduced, and the battery pack 100 is protected finally.
It should be noted that the supporting plate 22 of the present invention is made of a material with a high elongation percentage, so as to reduce the risk of fracture of the bottom supporting plate 2, and meanwhile, the supporting foam 15 may be disposed at the middle position of the bottom supporting plate 2, so as to reduce the impact force borne by the battery module 31 and also reduce the deformation of the bottom supporting plate 2.
In some embodiments, the supporting plate 22 is configured to have a hollow profile structure, so that when the supporting plate 22 is supported and installed between the battery module 31 and the lower housing 1, the supporting plate 22 has greater Z-directional structural strength, and the purpose of reducing the stress of the cell housing is achieved.
Wherein, when concrete design, be equipped with the brace rod for vertical slope in well cavity, that is to say, the inside integration at layer board 22 is provided with the brace rod, the upper end of brace rod links to each other with the roof of well cavity, and the lower extreme of brace rod links to each other with the diapire of well cavity, set up the brace rod simultaneously to certain contained angle for vertical slope, thereby make the bottom at battery package 100 receive the impact be that the direction of stress can carry out certain diffusion along the incline direction, thereby avoid the direction of stress direct transmission to give electric core, play the effect that reduces the impact force that battery module 31 bore, improve battery package 100's security.
In some embodiments, the pallet 22 is not overlapped with the weld region of the battery module 31 and is adhered to the liquid-cooled plate by the module bead 32 located above, thereby improving the rigidity of the middle region of the battery pack 100.
In some embodiments, as shown in fig. 3, the lower case 1 includes a bottom plate 11, side frames 12, and mounting stringers 13.
Wherein, the bottom plate 11 is located at the bottommost part of the lower shell 1, the side frame 12 is configured as a ring-shaped frame which is closed in the circumferential direction, the side frame 12 is installed above the bottom plate 11, so that the side frame 12 and the bottom plate 11 define an installation cavity which is opened upwards, and the installation longitudinal beam 13 is installed in the installation cavity along the longitudinal direction.
As shown in fig. 4, the bottom support plate 2 is installed in the installation cavity for installing and supporting the battery module 31, the support plate 22 is supported above the bottom plate 11, and the fixing beam 21 is arranged in the installation cavity along the transverse extension, wherein the fixing beam 21 can be fixedly connected with the side frame 12 and can also be connected with the installation longitudinal beam 13, or the fixing beam 21 can be simultaneously connected with the side frame 12 and the installation longitudinal beam 13, and in the specific design, the support plate 22 can also be detachably connected with the bottom wall of the installation cavity, so that the bottom support plate 2 can be detachably installed in the installation cavity.
In some embodiments, lower housing 1 further includes a first mounting beam 141, a second mounting beam 142, and a third mounting beam 143. The first mounting cross beam 141, the second mounting cross beam 142 and the third mounting cross beam 143 are longitudinally arranged in the mounting cavity in parallel at intervals, and the first mounting cross beam 141 and the second mounting cross beam 142 are distributed at two ends of the mounting longitudinal beam 13 at intervals.
As shown in fig. 4, the first mounting beam 141 is located at the rightmost side in the mounting cavity, and the first mounting beam 141 may be configured to be attached to the right side wall of the mounting cavity, the second mounting beam 142 is located at the left side in the mounting cavity and spaced apart from the left side wall of the mounting cavity, and the third mounting beam 143 is mounted at the left side in the mounting cavity and attached to the left side wall of the mounting cavity. The mounting cavity is divided into a first mounting region 161 and a second mounting region 162, wherein the first mounting region 161 is located between the first mounting beam 141 and the second mounting beam 142, and the second mounting region 162 is located between the second mounting beam 142 and the third mounting beam 143.
The bottom pallet 2 comprises a middle bottom pallet 2a and an end bottom pallet 2b, the middle bottom pallet 2a being located in the first mounting area 161 and the end bottom pallet 2b being located in the second mounting area 162. As shown in fig. 4, the first mounting region 161 has a large width and a large length and serves as a main mounting region in the battery pack 100, the first mounting region 161 is divided into sub-mounting regions at both sides of the mounting side member 13, and a middle bottom bracket 2a is provided in each sub-mounting region, so that the battery modules 31 can be provided in both sub-mounting regions. The second mounting region 162 is small in both width and length and serves as an auxiliary mounting region of the battery pack 100, i.e., the capacity of the battery modules 31 mounted in the first mounting region 161 is greater than the capacity of the battery modules 31 mounted in the second mounting region 162, and the second mounting region 162 is located at an end position of the battery pack 100.
In some embodiments, in the middle bottom bracket plate 2a, the fixing beam 21 is located at the middle position of the bracket plate 22 in the length direction, and a set of battery modules 31 is respectively mounted on both sides of the fixing beam 21, as shown in fig. 4, one middle bottom bracket plate 2a is respectively mounted in two sub-mounting areas, and the bracket plate 22 of the middle bottom bracket plate 2a extends in the longitudinal direction, the fixing beam 21 is located at the middle of the bracket plate 22 in the longitudinal direction, so as to divide the mounting area above the bracket plate 22 into two parts, that is, two sets of battery modules 31 are mounted above each middle bottom bracket plate 2a, and two sets of battery modules 31 are respectively disposed on both sides of the middle bottom bracket plate 2a, and one middle bottom bracket plate 2a is respectively disposed on both sides of the mounting longitudinal beam 13, so that four sets of battery modules 31 can be disposed in the first mounting area 161.
Wherein, the both ends of fixed beam 21 link to each other with installation longeron 13 and side frame 12 detachably respectively, can set up the connecting hole respectively at the both ends of fixed beam 21, also can be connected with installation longeron 13 and side frame 12 through the connecting piece that runs through the connecting hole, and layer board 22 links to each other with bottom plate 11 detachably, as shown in fig. 1, the side department at first layer board 221 is equipped with a plurality of connecting holes, be equipped with a plurality of connecting holes simultaneously on bottom plate 11, and similarly, first layer board 221 also can realize linking to each other with bottom plate 11's detachably through the connecting piece that runs through corresponding connecting hole.
The first cooling plate 33 is disposed on the top of the battery module 31 in the first mounting region 161, and the first cooling plate 33 covers the battery module 31, so that the first cooling plate 33 can cool and cool the battery module 31. During actual installation, the weld seam area of the battery module 31 does not coincide with the bottom support plate 2, and the module pressing strip 32 located above the module and the first cooling plate 33 can be used for bonding and fixing, so that the rigidity of the middle area of the battery pack 100 is improved.
After battery module 31 is boxed, can adopt moulding frock earlier and the gluey area of gluing and the gluey thickness of guaranteeing of spacing 233 complex form of rubber coating, and further, the structure is glued at battery module 31's upper surface coating, and then fix first cooling plate 33 cover on battery module 31 and through the connecting screw, the welding seam between electric core top cap and the electric core lateral wall is also avoided in the laminating region of first cooling plate 33 and electric core, thereby avoid first cooling plate 33 to warp and the too big problem of welding seam stress that arouses.
The module pressing strip 32 is connected above the first cooling plate 33 and the mounting longitudinal beam 13, wherein the module pressing strip 32 and the first cooling plate 33 can be fixedly connected in an adhesive mode, and the other side of the module pressing strip 32 is fixedly connected with the mounting longitudinal beam 13, so that the overall structural strength of the battery module 31 is improved.
And in the specific installation, as shown in fig. 8, the installation longitudinal beam 13 is located in the middle, and the first cooling plates 33 above the battery modules 31 on both sides of the installation longitudinal beam 13 are connected with the installation longitudinal beam 13 through the module pressing strips 32 above. And in the specific design, the module pressing strip 32 can be configured to include a main body part 321 and a plurality of protruding parts 322, wherein the plurality of protruding parts 322 are provided at intervals in the length direction of the main body part 321, when the module pressing strip is installed, the main body part 321 of the module pressing strip 32 and the upper surface of the battery module 31 can be adhered and fixed, the protruding parts 322 extend towards the installation longitudinal beam 13 to be connected with the installation longitudinal beam 13, and the plurality of protruding parts 322 of the module pressing strip 32 corresponding to the two first cooling plates 33 are staggered in the length direction of the installation longitudinal beam 13, that is, the two module pressing strips 32 are arranged above the installation longitudinal beam 13 in an mutually-meshed structural manner, so that the pressing force applied to the battery modules 31 on the two sides is ensured to be uniform, and the types of the pressing strips are reduced.
In some embodiments, in the end bottom bracket 2b, the fixing beam 21 is located at an end position of the bracket 22 in the length direction to be disposed opposite to the third mounting cross beam 143, that is, the fixing beam 21 of the end bottom bracket 2b is longitudinally spaced apart from and distributed opposite to the third mounting cross beam 143 to define the second mounting region 162 therebetween, and as shown in fig. 5, a group of battery modules 31 is disposed between the fixing beam 21 and the third mounting cross beam 143.
Wherein, both ends of the fixed beam 21 are detachably connected to both side walls of the side frame 12, which are distributed oppositely, as shown in fig. 5, connecting holes are respectively formed at both ends of the fixed beam 21, so that the end of the fixed beam 21 is fixed to the side frame 12 by a connecting member penetrating through the connecting holes, and simultaneously, the supporting plate 22 corresponding to the fixed beam 21 can also be detachably connected to the bottom plate 11.
From this, install middle part bottom plate 2a and tip bottom plate 2b respectively in casing 1's first installation region 161 and second installation region 162 after, realize the installation of battery module 31, and when battery module 31 and FPC broke down, can tear out middle part bottom plate 2a and tip bottom plate 2b together with corresponding battery module 31, wherein, can set up lifting hole 211 on the fixed beam 21 of bottom plate 2, and reach the dismantlement to battery module 31 in the lifting hole 211 through lifting device, do benefit to and realize quick replacement and maintenance. Wherein, the upper surface of the fixed beam 21 is provided with a positioning pin 212 for positioning and matching with the first cooling plate 33 or the second cooling plate 34, so as to ensure that the installation position of the cooling plate is more accurate.
In some embodiments, two layers of battery modules 31 are mounted in the second mounting region 162, the two layers of battery modules 31 are sequentially mounted in the up-down direction, the second cooling plate 34 is disposed between the two layers of battery modules 31, and the detachable module pressing plate 36 is disposed on the top of the upper layer of battery modules 31.
In the specific installation, after the battery module 31 of the lower layer is adhered to the bottom bracket 2, the structural adhesive is coated on the top surface of the battery module 31, and the second cooling plate 34 is fixedly installed on the top surface of the battery module 31. Further, the end plate of the battery module 31 is fixed to the third mounting beam 143 by bolts, so as to form a small module frame with the second cooling plate 34, then structural adhesive is coated on the upper surface of the second cooling plate 34, the battery module 31 on the upper layer is placed, structural adhesive is coated on the upper top surface of the upper layer module for mounting the module pressing plate 36, and the module end plate 35 is arranged on the side of the upper layer module away from the first mounting area 161. And the joint areas of the second cooling plate 34, the module pressing plate 36 and the battery module 31 all avoid the weld positions of the cells. As shown in fig. 7 and 8, the bottom pallet 2, the lower battery module 31, the second cooling plate 34, the upper battery module 31, and the module pressing plate 36 are integrated with each other, thereby improving the overall rigidity.
Therefore, in the invention, the battery module 31 is integrally lifted through the bottom supporting plate 2, so that a buffer area is formed between the bottom of the battery core and the bottom plate 11 of the lower shell 1, and the supporting foam 15 is designed, so that in the running process of the vehicle, if external impact occurs, the bottom impact can be effectively prevented from being transmitted to the battery module 31 due to the existence of the bottom impact buffer area and the supporting foam 15, and the running safety of the vehicle is ensured. Meanwhile, the bottom of the battery module 31 is not in direct contact with the bottom plate 11 of the lower shell 1, so that direct heat exchange between the battery core and the external environment is avoided, and a good heat preservation effect is achieved in a bottom buffering area.
And through setting up the structure of this battery package 100, when the inside electric core of battery package 100, FPC broke down, after confirming electric core, FPC position, can take out cooling plate, battery module 31, bottom bracket board 2, installation crossbeam from casing 1 down together after spare parts such as dismantling cooling plate and corresponding connecting piece. If the FPC is in failure, a new FPC can be welded on the module again and then put into a box again for assembly. If a battery core fails, the battery module 31 where the failed battery core is located may be taken out and replaced with a new battery module 31.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 pack (100), comprising:
a lower case (1);
the bottom supporting plate (2) is installed on the lower shell (1), the bottom supporting plate (2) comprises a fixed beam (21) and a supporting plate (22), the fixed beam (21) is connected with the supporting plate (22) and is positioned above the supporting plate (22), and the fixed beam (21) and/or the supporting plate (22) are/is detachably connected with the lower shell (1);
and the battery module (31), wherein the battery module (31) is adhered above the supporting plate (22).
2. The battery pack (100) of claim 1, wherein the tray (22) comprises a first tray (221) and a second tray (222), the first tray (221) and the second tray (222) being spaced apart in parallel; wherein
Two ends of the fixed beam (21) are respectively connected with the first supporting plate (221) and the second supporting plate (222), and two ends of the battery module (31) are respectively supported on the first supporting plate (221) and the second supporting plate (222).
3. The battery pack (100) of claim 2, wherein at least one of the first cradle (221) and the second cradle (222) is provided with a recessed clearance groove (231); wherein
The welding position of the end part of the battery module (31) is opposite to the avoiding groove (231) so as to be spaced from the first supporting plate (221) or the second supporting plate (222), and a glue blocking piece (232) is arranged at the edge of the avoiding groove (231).
4. The battery pack (100) according to claim 1, wherein the support plate (22) is provided with a glue limiting strip (233), and the glue limiting strip (233) is arranged at the edge of the support plate (22) and used for blocking the structural glue from overflowing.
5. The battery pack (100) of claim 1, wherein the support plate (22) is configured as a profile structure having a hollow cavity, and a support rib inclined with respect to a vertical direction is provided in the hollow cavity.
6. The battery pack (100) according to any one of claims 1 to 5, wherein the lower case (1) comprises a bottom plate (11), side frames (12) and mounting longitudinal beams (13), the side frames (12) and the bottom plate (11) define a mounting cavity which is opened upwards, the mounting longitudinal beams (13) are mounted in the mounting cavity along the longitudinal direction, and the support plate (22) is supported above the bottom plate (11); wherein
The fixing beam (21) extends along the transverse direction and is arranged in the mounting cavity, and the fixing beam (21) is connected with the side frame (12) and/or the mounting longitudinal beam (13).
7. The battery pack (100) according to claim 6, wherein the lower case (1) further comprises a first mounting cross beam (141), a second mounting cross beam (142) and a third mounting cross beam (143), the first mounting cross beam (141) and the second mounting cross beam (142) are distributed at two ends of the mounting longitudinal beam (13) in a spaced manner;
the mounting cavity is divided into a first mounting area (161) between the first mounting cross beam (141) and the second mounting cross beam (142) and a second mounting area (162) between the second mounting cross beam (142) and the third mounting cross beam (143), the bottom support plate (2) comprises a middle bottom support plate (2a) and an end bottom support plate (2b), the middle bottom support plate (2a) is located in the first mounting area (161), and the end bottom support plate (2b) is located in the second mounting area (162).
8. The battery pack (100) according to claim 7, wherein in the middle bottom support plate (2a), the fixing beam (21) is located at the middle position of the support plate (22) along the length direction, a group of battery modules (31) are respectively installed on two sides of the fixing beam (21), two ends of the fixing beam (21) are respectively detachably connected with the installation longitudinal beam (13) and the side frame (12), and the support plate (22) is detachably connected with the bottom plate (11); wherein
The top of the battery module (31) in the first mounting region (161) is provided with a first cooling plate (33), and a module pressing strip (32) is connected above the first cooling plate (33) and the mounting longitudinal beam (13).
9. The battery pack (100) according to claim 7, wherein, in the end bottom bracket (2b), the fixing beam (21) is located at an end position of the bracket (22) in the length direction to be arranged opposite to the third mounting beam (143), and a set of the battery modules (31) is arranged between the fixing beam (21) and the third mounting beam (143), and both ends of the fixing beam (21) are detachably connected to both side walls of the side frame (12) which are distributed oppositely.
10. The battery pack (100) according to claim 7, wherein two layers of the battery modules (31) are mounted in the second mounting region (162), a second cooling plate (34) is disposed between the two layers of the battery modules (31), and a detachable module pressing plate (36) is disposed on the top of the upper layer of the battery modules (31).
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| CN202111406188.6A CN114069144B (en) | 2021-11-24 | 2021-11-24 | battery pack |
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| CN202111406188.6A CN114069144B (en) | 2021-11-24 | 2021-11-24 | battery pack |
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| CN114069144B (en) | 2023-11-21 |
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