CN114069144B - battery pack - Google Patents
battery pack Download PDFInfo
- Publication number
- CN114069144B CN114069144B CN202111406188.6A CN202111406188A CN114069144B CN 114069144 B CN114069144 B CN 114069144B CN 202111406188 A CN202111406188 A CN 202111406188A CN 114069144 B CN114069144 B CN 114069144B
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- Prior art keywords
- mounting
- plate
- support plate
- supporting plate
- battery
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- 238000009434 installation Methods 0.000 claims description 44
- 238000001816 cooling Methods 0.000 claims description 37
- 239000003292 glue Substances 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000004026 adhesive bonding Methods 0.000 description 9
- 239000006260 foam Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- 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 support plate is mounted on the lower shell and comprises a fixed beam and a support plate, the fixed beam is connected with the support plate and is positioned above the support plate, and the fixed beam and/or the support plate are/is detachably connected with the lower shell; and the battery module is adhered to the upper part of the supporting plate. According to the battery pack disclosed by the invention, the battery module can be adhered to the bottom support plate and then is jointly installed on the lower shell together with the bottom support plate, and the bottom support plate is detachably connected with the lower shell, so that when the battery module and the FPC are in fault, the battery module with the fault FPC and the fault battery cell 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 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
In the prior art, the battery cell is mostly in a fixed form of direct bonding with the shell of the battery pack, when structures such as the battery cell in the battery pack are required to be maintained, the fault battery cell cannot be directionally dismantled, the whole battery pack is required to be replaced, so that the maintenance cost is increased, the maintenance efficiency is lower, the fault tolerance rate in the production process is lower, the rejection rate of the battery pack in the production process is higher, the production cost is increased, and the improvement space exists.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a battery pack in which a battery module is detachably mounted in a lower case through a bottom plate, which has lower maintenance costs, higher maintenance efficiency, and higher fault tolerance in the production process.
According to an embodiment of the present invention, a battery pack includes: a lower housing; the bottom support plate is mounted on the lower shell and comprises a fixed beam and a support plate, the fixed beam is connected with the support plate and is positioned above the support plate, and the fixed beam and/or the support plate are/is detachably connected with the lower shell; and the battery module is adhered to the upper part of the supporting plate.
According to the battery pack disclosed by the embodiment of the invention, the battery module can be adhered to the bottom supporting plate and then mounted 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 can be detached, and the failed FPC and the battery module where the failed battery cell is positioned can be maintained or replaced, so that the maintainability of the battery pack can be greatly improved, the maintenance cost and the maintenance efficiency are reduced, and meanwhile, the fault tolerance in the production process is also improved.
According to the battery pack disclosed by the embodiment of the invention, the supporting plate comprises a first supporting plate and a second supporting plate, and the first supporting plate and the second supporting plate are distributed in parallel and at intervals; the two ends of the fixing 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 by 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 avoidance groove; the welding position of the end part of the battery module is opposite to the avoidance groove, so that the end part of the battery module is spaced apart from the first supporting plate or the second supporting plate, and the edge of the avoidance groove is provided with a glue blocking piece.
According to the battery pack disclosed by the embodiment of the invention, the supporting plate is provided with the gluing limiting strips, and the gluing limiting strips are arranged at the edge of the supporting plate and are used for blocking structural glue from overflowing.
According to the battery pack provided by the embodiment of the invention, the supporting plate is constructed into a section bar structure with a hollow cavity, and the hollow cavity is internally provided with the supporting ribs which incline relative to the vertical direction.
According to the battery pack disclosed by the embodiment of the invention, the lower shell comprises a bottom plate, side frames and mounting stringers, wherein the side frames and the bottom plate define an upwardly open mounting cavity, the mounting stringers are longitudinally arranged in the mounting cavity, and the supporting plate is supported above the bottom plate; wherein the fixed beam extends along the transverse direction and is arranged in the installation cavity, and the fixed beam is connected with the side frames and/or the installation longitudinal beams.
According to the battery pack disclosed 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, wherein the first mounting cross beam and the second mounting cross beam are distributed at two ends of the mounting longitudinal beam at intervals; the mounting cavity is divided into a first mounting area located between the first mounting cross beam and the second mounting cross beam and a second mounting area located 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 disclosed by the embodiment of the invention, in the middle bottom supporting plate, the fixed beam is positioned at the middle position of the supporting plate along the length direction, a group of battery modules are respectively arranged at two sides of the fixed beam, two ends of the fixed beam are respectively detachably connected with the mounting longitudinal beam and the side frames, 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 a module pressing bar is connected above the first cooling plate and the installation longitudinal beam.
According to the battery pack disclosed by the embodiment of the invention, in the end bottom supporting plate, the fixing beam is positioned at the end position of the supporting plate along the length direction so as to be opposite to the third mounting cross beam, a group of battery modules are arranged between the fixing beam and the third mounting cross beam, and two ends of the fixing beam are detachably connected with two side walls which are oppositely distributed on the side frames respectively.
According to the battery pack disclosed by the embodiment of the invention, two layers of the battery modules are arranged in the second installation area, a second cooling plate is arranged between the two layers of the battery modules, and a detachable module pressing plate is arranged at the top of the upper layer of the 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 foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of a bottom pallet 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 pallet 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 plate, a lower case, and a battery module of a battery pack according to an 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 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 present 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 top 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 stringers 13, the first mounting cross member 141, the second mounting cross member 142, the third mounting cross member 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 lifting hole 211, the locating 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 limit piece 233, the middle bottom supporting plate 2a and the end bottom supporting plate 2b,
the battery module 31, the module bead 32, the main body portion 321, the protruding portion 322, the first cooling plate 33, the second cooling plate 34, the module end plate 35, the module pressing plate 36.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The following describes a battery pack 100 according to an embodiment of the present invention with reference to fig. 1 to 12, where a battery module 31 of the battery pack 100 may be adhered to a bottom plate 2, and then mounted together with the bottom plate 2 on a lower case 1, and the bottom plate 2 is detachably connected to the lower case 1, so that when the battery module 31 and an FPC (flexible circuit board) fail, the battery module 31 can be repaired or replaced by detaching the battery module 31, and the failed FPC (flexible circuit board) and the battery module 31 where the failed battery cell is located, thereby greatly improving maintainability of the battery pack 100 and reducing maintenance cost and maintenance efficiency. And meanwhile, the fault tolerance rate in the production process is 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 bracket 2, and a battery module 31.
The lower housing 1 is configured as a frame structure, and as shown in fig. 2, the lower housing 1 defines an upwardly open installation cavity, and in actual installation, the bottom support plate 2 may be installed in the installation cavity of the lower housing 1, so that the bottom support plate 2 and the lower housing 1 are in a relatively stable state, wherein the bottom support plate 2 is detachably connected with the lower housing 1, so that the bottom support plate 2 may be installed in the installation cavity, and also flexibly removed from the installation cavity.
The bottom pallet 2 includes a fixing beam 21 and a pallet 22, as shown in fig. 3, the pallet 22 is constructed in a flat plate shape, i.e., the pallet 22 is formed with a supporting plane, wherein the pallet 22 is fixedly coupled to the fixing beam 21, e.g., the fixing beam 21 is detachably coupled to the pallet 22 through a coupling member, or the fixing beam 21 is welded to the pallet 22 such that the fixing beam 21 and the pallet 22 are coupled as a unit. And as shown in fig. 1, the fixing beam 21 is located above the pallet 22, i.e., the lower side edge of the fixing beam 21 may be welded to the upper surface of the pallet 22. Wherein the pallet 22 may be provided in one, two or more, and each pallet 22 is connected to the fixing beam 21 when the pallet 22 is provided in more than two.
And at the time of specific installation, the fixing beam 21 may be detachably connected with the lower case 1, the supporting plate 22 may be detachably connected with the lower case 1, or both may be detachably connected with the lower case 1, so that the bottom supporting plate 2 may be flexibly detached from the lower case 1. The battery module 31 is installed in the bottom support plate 2, and installs in the lower casing 1 jointly with the bottom support plate 2, and can bond battery module 31 in the supporting plane of layer board 22, can coat the structural adhesive on the supporting plane, again with the bottom of battery module 31 and laminating of structural adhesive to make battery module 31 bond and be fixed in on the layer board 22, guarantee that the bottom of battery module 31 is held effectively, guarantee the installation stability of battery module 31.
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 bonding and then detachably connecting when in specific installation, thereby being beneficial to directional dismantling when the battery cell fails, namely, the battery cell can be independently replaced when the battery cell fails, thus ensuring that the vehicle continues to run, and reducing the replacement cost.
According to the battery pack 100 of the embodiment of the invention, the battery module 31 can be adhered to the bottom support plate 2 and then mounted on the lower housing 1 together with the bottom support plate 2, and the bottom support plate 2 is detachably connected with the lower housing 1, so that when the battery module 31 and the FPC fail, the battery module 31 with the failed FPC and the failed battery cell 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 improving the fault tolerance in the production process.
In some embodiments, as shown in fig. 1, the pallet 22 includes a first pallet 221 and a second pallet 222, where the first pallet 221 and the second pallet 222 are parallel and spaced apart, and in a specific design, the widths and lengths of the first pallet 221 and the second pallet 222 may be set to be the same, so as to reduce the difficulty of forming the two, and have the same supporting plane and relatively uniform structural strength.
The two ends of the fixing beam 21 are respectively connected with 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 parallel and spaced apart, and are parallel to the horizontal plane, one end of the fixing beam 21 is welded and connected with the upper surface of the first supporting plate 221, the other end of the fixing beam 21 is welded and connected with the upper surface of the second supporting plate 222, and the middle area of the fixing beam 21 is suspended. That is, the fixing beam 21 may be used to connect the first and second pallets 221 and 222 such that the first and second pallets 221 and 222 can be commonly detached and installed.
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 adhered together through structural adhesive, and the head and the tail of the battery module 31 are respectively adhered and fixed with the supporting planes of the first supporting plate 221 and the second supporting plate 222, so that the condition that most area of the bottom of the battery module 31 is supported is ensured, and the installation stability of the battery module 31 is improved.
In some embodiments, at least one of the first supporting plate 221 and the second supporting plate 222 is provided with a concave avoidance groove 231, that is, the first supporting plate 221 may be provided with the avoidance groove 231, the second supporting plate 222 may be provided with the avoidance groove 231, or both of them may be provided with the avoidance groove 231, so that the welding position of the end portion of the battery module 31 is opposite to the avoidance groove 231, and thus, after the battery module 31 is installed, the battery cell casing, especially the welding seam of the battery cell top cover and the battery cell side wall, is opposite to the avoidance groove, so that the welding seam position is staggered with the first supporting plate 221 or the second supporting plate 222, and the welding position is prevented from cracking due to overlarge stress at the welding seam position.
It can be understood that the bottom support plate 2 is adhered to the cell housing, and the impact force is transmitted to the cell housing after the support plate 22 is deformed under force, so that the rigid impact of the first support plate 221 or the second support plate 222 on the welding seam position can be effectively avoided by the arrangement of the avoiding groove in the invention, thereby being beneficial to improving the safety of the battery module 31.
And as shown in fig. 1 and 2, a glue blocking piece 232 is disposed at the edge of the avoidance slot 231, wherein the avoidance slot 231 extends along the length direction of the supporting plate 22, and the glue blocking piece 232 is also configured to extend along the length direction of the avoidance slot 231, that is, each position of the glue blocking piece 232 in the length direction of the avoidance slot 231 plays a role in blocking glue, so that structural glue is prevented from entering the avoidance slot 231 to form a supporting point. The glue blocking piece 232 may be configured as glue blocking foam, and the lower side edge of the glue blocking foam is mounted in the avoidance groove 231 to block structural glue, so as to be used for blocking force transmission.
In some embodiments, the supporting plate 22 is provided with glue-coating limiting bars 233, the glue-coating limiting bars 233 are disposed at edges of the supporting plate 22 and are used for blocking the structural glue from overflowing, that is, the structural glue can be prevented from overflowing to the outer side of the supporting plate 22 by disposing the glue-coating limiting bars 233, wherein the first supporting plate 221 and the second supporting plate 222 can be provided with the glue-coating limiting bars 233, each supporting plate 22 is provided with two glue-coating limiting bars 233, and the two glue-coating limiting bars 233 are respectively disposed at two side edges of the supporting plate 22, so that the structural glue can be prevented from overflowing from two side edges of the supporting plate 22.
And adopt the gluing frock to guarantee the gluing area and the thickness of gluing with the spacing 233 complex form of gluing after battery module 31 goes into the case, guarantee the stability of battery module 31 installation. Wherein, during the specific installation, can paste the support foam 15 on lower casing 1 to fill the clearance between layer board 22 and lower casing 1 through the support foam 15, when the battery package 100 received the impact from the bottom, utilize the deformation of support foam 15 to take energy-absorbing, thereby reduce the impact force that battery module 31 born, finally protect battery package 100.
It should be noted that, the supporting plate 22 in the present invention is made of a material with a higher elongation rate, so as to reduce the risk of breakage of the bottom supporting plate 2, and the supporting foam 15 may be disposed at the middle position of the bottom supporting plate 2, so that not only the impact force born by the battery module 31 may be reduced, but also the deformation amount of the bottom supporting plate 2 may be reduced.
In some embodiments, the supporting plate 22 is constructed in a hollow profile structure, so that the supporting plate 22 has a greater Z-directional structural strength when the supporting plate 22 is supportedly mounted between the battery module 31 and the lower case 1, for the purpose of reducing the stress of the battery cell case.
Wherein, when the concrete design, be equipped with the supporting rib for vertical slope in the cavity intracavity, that is to say, the integrated supporting rib that is provided with in the inside of layer board 22, the upper end of supporting rib links to each other with the roof of cavity, and the lower extreme of supporting rib links to each other with the diapire of cavity, set up the supporting rib to certain contained angle for vertical slope simultaneously, thereby it can carry out certain diffusion along the incline direction to receive the impact in the bottom of battery package 100 to make the direction of atress receive, thereby avoid the direction of atress to directly transmit for the electric core, play the effect of reducing the impact force that battery module 31 bore, improve the security of battery package 100.
In some embodiments, the pallet 22 is not overlapped with the weld area of the battery module 31 and is adhered to the liquid cooling plate by the module bead 32 positioned above, whereby the rigidity of the middle area of the battery pack 100 can be improved.
In some embodiments, as shown in fig. 3, the lower shell 1 includes a floor panel 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, and 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 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 lateral extension, wherein the fixing beam 21 may be fixedly connected with the side frame 12 or may be connected with the installation longitudinal beam 13, or the fixing beam 21 may be simultaneously connected with the side frame 12 and the installation longitudinal beam 13, and in a specific design, the support plate 22 may be detachably connected with the bottom wall of the installation cavity, so that the bottom plate 2 is detachably installed in the installation cavity.
In some embodiments, the 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 arranged in the mounting cavity at intervals in parallel in the longitudinal direction, 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 of 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 of 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 of 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 end bottom pallets 2b, the middle bottom pallet 2a being located in a first mounting area 161 and the end bottom pallets 2b being located in a 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 located at both sides of the mounting stringers 13, and one middle bottom plate 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 has a smaller width and length and serves as an auxiliary mounting region of the battery pack 100, i.e., the capacity of the battery module 31 mounted in the first mounting region 161 is greater than the capacity of the battery module 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 pallet 2a, the fixing beam 21 is located at a middle position of the pallet 22 in the length direction, and one group of battery modules 31 are respectively mounted at both sides of the fixing beam 21, as shown in fig. 4, one middle bottom pallet 2a is respectively mounted at two sub-mounting areas, and the pallet 22 of the middle bottom pallet 2a extends in the longitudinal direction, and the fixing beam 21 is located at a middle position of the pallet 22 in the longitudinal direction to divide the mounting area above the pallet 22 into two parts, i.e., two groups of battery modules 31 are mounted above each middle bottom pallet 2a, and two groups of battery modules 31 are respectively mounted at both sides of the middle bottom pallet 2a, and one middle bottom pallet 2a is respectively mounted at both sides of the mounting stringer 13, so that four groups of battery modules 31 can be disposed in the first mounting area 161.
Wherein, both ends of the fixed beam 21 are detachably connected with the mounting longitudinal beam 13 and the side frame 12 respectively, namely, the connecting holes can be respectively formed at both ends of the fixed beam 21, the connecting pieces of the through connecting holes can be connected with the mounting longitudinal beam 13 and the side frame 12, and the supporting plate 22 is detachably connected with the bottom plate 11, as shown in fig. 1, a plurality of connecting holes are formed at the side edge of the first supporting plate 221, and a plurality of connecting holes are formed on the bottom plate 11, and likewise, the first supporting plate 221 can be detachably connected with the bottom plate 11 through the connecting pieces of the through corresponding connecting holes.
The top of the battery module 31 in the first mounting region 161 is provided with a first cooling plate 33, and the first cooling plate 33 covers the battery module 31 such that the first cooling plate 33 can cool down and cool down the battery module 31. In the actual installation, the weld area of the battery module 31 is not overlapped with the bottom plate 2, and the module pressing bar 32 above the module can be adhered and fixed with the first cooling plate 33, so as to improve the rigidity of the middle area of the battery pack 100.
After the battery module 31 is put into the box, the glue bonding area and the glue bonding thickness can be ensured by adopting a glue pressing tool and a glue bonding limiting strip 233 in a matched mode, and further, structural glue is coated on the upper surface of the battery module 31, so that the first cooling plate 33 is covered on the battery module 31 and is fixed through connecting screws, and the joint area of the first cooling plate 33 and the battery cell also avoids the welding seam between the battery cell top cover and the battery cell side wall, thereby avoiding the problem of overlarge welding seam stress caused by deformation of the first cooling plate 33.
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 concrete design, can construct module layering 32 to including body portion 321 and bulge 322, wherein, bulge 322 is a plurality of, and a plurality of bulge 322 are spaced apart in the length direction of body portion 321 and are set up, during the installation, can bond the upper surface fixed of body portion 321 and the battery module 31 of module layering 32, bulge 322 stretches out in order to link to each other with installation longeron 13 towards installation longeron 13, and a plurality of bulge 322 of module layering 32 that two first cooling plates 33 correspond are staggered arrangement in the length direction of installation longeron 13, two module layering 32 adopt the structure form of interlock each other to arrange in the top of installation longeron 13, guarantee that the compressive force that battery module 31 of both sides received is even, reduce the layering kind simultaneously.
In some embodiments, in the end bottom pallet 2b, the fixing beams 21 are located at end positions of the pallet 22 in the length direction to be disposed opposite to the third mounting cross member 143, i.e., the fixing beams 21 of the end bottom pallet 2b are spaced apart from and distributed opposite to the third mounting cross member 143 in the longitudinal direction to define a second mounting area 162 therebetween, and as shown in fig. 5, a set of battery modules 31 is provided between the fixing beams 21 and the third mounting cross member 143.
Wherein, two ends of the fixing beam 21 are detachably connected with two opposite side walls of the side frame 12, as shown in fig. 5, connecting holes are respectively provided at two ends of the fixing beam 21, so that the ends of the fixing beam 21 are fixed to the side frame 12 by connecting pieces penetrating through the connecting holes, and meanwhile, the supporting plate 22 corresponding to the fixing beam 21 can be detachably connected with the bottom plate 11.
Therefore, after the middle bottom support plate 2a and the end bottom support plate 2b are respectively installed in the first installation area 161 and the second installation area 162 of the lower shell 1, the battery module 31 is installed, and when the battery module 31 and the FPC fail, the middle bottom support plate 2a and the end bottom support plate 2b together with the corresponding battery module 31 can be detached, wherein the lifting holes 211 can be arranged on the fixing beams 21 of the bottom support plate 2, and the battery module 31 can be detached by extending lifting tools into the lifting holes 211, so that the quick replacement and maintenance can be realized. 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 mounting position of the cooling plates is more accurate.
In some embodiments, two layers of battery modules 31 are installed in the second installation area 162, the two layers of battery modules 31 are installed sequentially along the up-down direction, a second cooling plate 34 is disposed between the two layers of battery modules 31, and a detachable module pressing plate 36 is disposed on the top of the upper layer of battery module 31.
In the specific installation, the lower battery module 31 may be adhered to the bottom plate 2, and then the top surface of the battery module 31 is coated with a structural adhesive, 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 through bolts, so that a small module frame is formed with the second cooling plate 34, structural adhesive is coated on the upper surface of the second cooling plate 34, the upper layer of battery module 31 is placed, structural adhesive is coated on the upper top surface of the upper layer of module for mounting the module pressing plate 36, and the module end plate 35 is arranged on one side of the upper layer of module, which is far 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 are kept away from the welding seam positions of the battery cells. As shown in fig. 7 and 8, the bottom plate 2, the lower battery module 31, the second cooling plate 34, the upper battery module 31, and the module pressing plate 36 are integrally formed, thereby improving the overall rigidity.
Therefore, in the invention, the battery module 31 is integrally lifted by the bottom support plate 2, so that a buffer zone is formed between the bottom of the battery cell and the bottom plate 11 of the lower shell 1, and the supporting foam 15 is designed, and in the running process of the vehicle, if external impact is encountered, the bottom impact is effectively prevented from being transmitted to the battery module 31 due to the buffer zone of the bottom impact and the existence of the supporting foam 15, so that 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 cell and the external environment is avoided, and a bottom buffer zone plays a good role in heat preservation.
And through setting up the structure of this battery package 100, when battery package 100's inside electric core, FPC break down, after confirming electric core, FPC position, can be through taking out cooling plate, battery module 31, bottom plate 2, installation crossbeam together in lower casing 1 after demolishing spare parts such as cooling plate and corresponding connecting piece. If the FPC fails, the new FPC can be re-welded to the module and re-packaged for assembly. If the battery cell fails, the battery module 31 with the failed battery cell can be taken out and replaced with a new battery module 31.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the invention, a "first feature" or "second feature" may include one or more of such features.
In the description of the present invention, "plurality" means two or more.
In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A battery pack (100), characterized by comprising:
a lower case (1); the lower shell (1) comprises a bottom plate (11), side frames (12) and mounting stringers (13), wherein the side frames (12) and the bottom plate (11) define an upwardly open mounting cavity, and the mounting stringers (13) are longitudinally mounted in the mounting cavity; a bottom support plate (2), wherein the bottom support plate (2) is mounted on the lower shell (1), the bottom support plate (2) comprises a fixed beam (21) and a support plate (22), the support plate (22) is supported above the bottom plate (11), the fixed beam (21) is connected with the support plate (22) and is positioned above the support plate (22), and the fixed beam (21) and/or the support plate (22) are detachably connected with the lower shell (1);
a battery module (31), wherein the battery module (31) is adhered above the supporting plate (22);
the pallet (22) comprises a first pallet (221) and a second pallet (222), and the first pallet (221) and the second pallet (222) are distributed in parallel and at intervals;
both ends of the fixed beam (21) are respectively connected with the first supporting plate (221) and the second supporting plate (222), and both ends of the battery module (31) are respectively supported on the first supporting plate (221) and the second supporting plate (222); at least one of the first pallet (221) and the second pallet (222) is provided with a concave avoidance slot (231);
the lower shell (1) further comprises a first mounting cross beam (141), a second mounting cross beam (142) and a third mounting cross beam (143) which are spaced apart, wherein 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 apart 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 (2 a) and an end bottom support plate (2 b), the middle bottom support plate (2 a) is positioned in the first mounting area (161), and the end bottom support plate (2 b) is positioned in the second mounting area (162);
in the middle bottom supporting plate (2 a), the fixed beam (21) is positioned at the middle position of the supporting plate (22) along the length direction, a group of battery modules (31) are respectively arranged at two sides of the fixed beam (21), two ends of the fixed beam (21) are respectively detachably connected with the mounting longitudinal beam (13) and the side frame (12), and the supporting plate (22) is detachably connected with the bottom plate (11);
in the end bottom supporting plate (2 b), the fixed beam (21) is located at an end position of the supporting plate (22) along the length direction so as to be opposite to the third mounting cross beam (143), a group of battery modules (31) is arranged between the fixed beam (21) and the third mounting cross beam (143), and two ends of the fixed beam (21) are detachably connected with two side walls of the side frame (12) which are distributed oppositely; the welding position of the end part of the battery module (31) is opposite to the avoidance 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 avoidance groove (231);
the top of the battery module (31) is provided with a first cooling plate (33), the first cooling plate (33) is fixedly connected with the battery module (31), the first cooling plates (33) above the battery module (31) on two sides of the mounting longitudinal beam (13) are connected with the mounting longitudinal beam (13) through module pressing strips (32) arranged above, one side of the module pressing strips (32) is fixedly adhered to the first cooling plate (33), and the other side of the module pressing strips (32) is fixedly connected with the mounting longitudinal beam (13); wherein, module layering (32) include main part (321) and bulge (322), bulge (322) are a plurality of, and a plurality of bulge (322) are in the length direction of main part (321) is spacing setting, main part (321) with first cooling plate (33) bond fixedly, bulge (322) with installation longeron (13) are fixed to be linked to each other, and a plurality of bulge (322) of module layering (32) that two first cooling plate (33) correspond are crisscross setting in the length direction of installation longeron (13).
2. The battery pack (100) according to claim 1, wherein the pallet (22) is provided with glue-spreading limit bars (233), and the glue-spreading limit bars (233) are provided at edges of the pallet (22) and are used for blocking overflow of structural glue.
3. The battery pack (100) according to claim 1, wherein the pallet (22) is constructed as a profile structure having a hollow cavity, and wherein the hollow cavity is provided therein with support ribs inclined with respect to the vertical.
4. The battery pack (100) according to claim 1, wherein two layers of the battery modules (31) are installed in the second installation area (162), a second cooling plate (34) is arranged between the two layers of the battery modules (31), and a detachable module pressing plate (36) is arranged at the top of the upper layer of the battery modules (31).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111406188.6A CN114069144B (en) | 2021-11-24 | 2021-11-24 | battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111406188.6A CN114069144B (en) | 2021-11-24 | 2021-11-24 | battery pack |
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| CN114069144B true CN114069144B (en) | 2023-11-21 |
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| CN114069144A (en) | 2022-02-18 |
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