CN114552110A - Battery pack and vehicle - Google Patents
Battery pack and vehicle Download PDFInfo
- Publication number
- CN114552110A CN114552110A CN202011348922.3A CN202011348922A CN114552110A CN 114552110 A CN114552110 A CN 114552110A CN 202011348922 A CN202011348922 A CN 202011348922A CN 114552110 A CN114552110 A CN 114552110A
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- Prior art keywords
- tray
- battery
- pressing
- battery pack
- plate
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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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/236—Hardness
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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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 relates to a battery pack and a vehicle, wherein a battery comprises an upper cover, a tray, a pressing strip and a plurality of battery modules, two ends of each battery module in the X direction are abutted against the inner wall of the tray, and the pressing strip is arranged between two adjacent battery modules in the Y direction; the pressing strip comprises a pressing plate and vertical pressing ribs connected to the bottom surface of the pressing plate, and the bottom surface of the pressing plate is tightly pressed at the edges of the opposite sides of the top surfaces of the two adjacent battery modules in the Y direction; the both ends of the X direction of clamp plate are fixed on the tray, vertical ribbing inserts adjacent two gap between the battery module, the orientation of battery module be provided with on one side surface of vertical ribbing and stretch into the elastic bulge in gap, the both sides face of the Y direction of vertical ribbing rather than both sides elastic bulge butt. According to the battery pack, the bending rigidity of the cross section of the pressing bar is improved by the vertical pressing ribs, and the large impact load in the Z direction can be borne.
Description
Technical Field
The invention belongs to the technical field of new energy vehicles, and particularly relates to a battery pack and a vehicle.
Background
As market competition increases, the hybrid vehicle demand for battery pack mileage increases. In order to share the existing fuel vehicle platform, the battery pack of the hybrid vehicle can only be arranged in the existing vehicle body. The space size is limited and more battery cores need to be arranged, higher requirements are provided for the volume utilization rate of the battery pack, and no concepts such as modules and CTP are generated.
The Chinese patent application with the application number of 'CN 201920056136.2' discloses a non-module battery pack, which is provided with a battery pack sheet metal box and a plurality of series-connected battery cores arranged in the battery pack sheet metal box; the battery cells are arranged in the inner cavity of the battery pack sheet metal box in a rectangular array, the periphery of the battery cells is in contact with the inner wall of the battery pack sheet metal box, and the top ends of the battery cells arranged in the same row are pressed tightly through battery cell pressing strips; the cell pressing strip is matched with a groove in the middle of a cell support at the top of the cell, and the cell pressing strip is fixed with the pressing strip fixing seat through a fixing screw; the pressing strip fixing seat and the battery pack metal plate box are fixed through mounting screws.
However, the above-mentioned non-module battery pack has the following drawbacks:
(1) the pressing strip is flat, the bearing capacity of the pressing strip under the impact load in the Z direction (vertical direction) is insufficient, and the deformation amount of the middle position is large.
(2) The pressing strip is in rigid contact with the battery cell, so that the shell of the battery cell is easily damaged, and the explosion-proof valve is pressed, so that the safety of the battery cell is influenced.
(3) The X of electricity core module is not fixed to (the direction of piling up of electric core) and Y to (the direction of piling up of electric core module), and the battery module is easily drunkenness in the battery package, influences the safety of battery package.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the battery pack and the vehicle are provided for solving the problems that a pressing strip is flat and the bearing capacity of the pressing strip under Z-direction impact load is insufficient in the existing module-free battery pack.
In order to solve the technical problem, in one aspect, an embodiment of the present invention provides a battery pack, including an upper cover, a tray, a pressing bar, and a plurality of battery modules stacked along a Y direction, where the upper cover is connected to the tray to enclose a cavity for accommodating the plurality of battery modules, two ends of the battery modules in an X direction are abutted to an inner wall of the tray to fix the plurality of battery modules in the X direction, a bottom surface of the battery module is abutted to a bottom plate of the tray, and the pressing bar is disposed between two adjacent battery modules in the Y direction;
the pressing strip comprises a pressing plate and vertical pressing ribs connected to the bottom surface of the pressing plate, and the bottom surface of the pressing plate is tightly pressed at the opposite side edges of the top surfaces of two adjacent battery modules in the Y direction so as to fix the plurality of battery modules in the Z direction; the both ends of the X direction of clamp plate are fixed on the tray, vertical ribbing inserts adjacent two gap between the battery module, the orientation of battery module be provided with on one side surface of vertical ribbing and stretch into the elastic bulge in gap, the both sides face of the Y direction of vertical ribbing rather than both sides elastic bulge butt to it is fixed a plurality ofly in the Y direction the battery module.
Optionally, the battery module includes that the electric core that is piled up along the X direction by a plurality of electric cores piles and compresses tightly the end plate of the X direction both sides of electric core pile, deviating from of end plate one side of electric core pile is fixed on the tray, the orientation of end plate one side of electric core pile with one side of the X direction of electric core pile supports and leans on.
Optionally, the end plate includes an end plate body and an elastic member connected to a side of the end plate body facing away from the cell stack, the elastic member abuts against an inner wall of the tray, and a side of the end plate body facing the cell stack abuts against a side of the cell stack in the X direction.
Optionally, the elastic member includes two arch portions and a connecting portion connecting bottoms of the two arch portions, the connecting portion is attached to a side surface of the end plate body facing away from the electric core stack, and a top of the arch portion abuts against an inner wall of the tray.
Optionally, the battery module further includes side plates fixed to two sides of the cell stack in the Y direction, and the side plates are provided with a plurality of elastic protrusions arranged in the X direction;
the top of the side plate faces to the pole of the battery cell to form a turned edge pressed on the top surface of the battery cell, and the bottom surface of the pressing plate is pressed on the turned edge.
Optionally, the pressing strip further comprises a compressible gasket strip, and the compressible gasket strip is arranged at the edges of the bottom surface of the pressing plate and the opposite sides of the top surfaces of the two adjacent battery modules in the Y direction.
Optionally, the pressing strip further comprises a connecting strip arranged on the top surface of the pressing plate, and the top surface of the connecting strip is attached to the bottom surface of the upper cover; the connecting strip is provided with a first mounting hole which is used for being fixedly connected with the upper cover.
Optionally, two ends of the pressing plate in the X direction protrude from two ends of the connecting strip in the X direction, and two ends of the pressing plate in the X direction are provided with second mounting holes for fixedly connecting with the tray.
Optionally, be provided with in the tray and stretch into the separation muscle in gap, the bottom of separating the muscle with the bottom plate of tray is connected, the both sides of the X direction of separating the muscle with the both sides wall of the X direction of tray is connected, it will to separate the muscle a plurality of subcavities are separated into to the cavity, each battery module holds and is corresponding the subcavity, the top of separating the muscle with the bottom interval of vertical pressure muscle is relative.
Optionally, the tray has the multilayer along the Z direction piles up, and every layer be provided with a plurality ofly along the Y direction in the tray battery module, the upper cover with the top tray fixed connection, adjacent two-layer tray, the top the bottom plate of tray is fixed the below the upper portion opening part of tray.
According to the battery pack of the embodiment of the invention, the two ends of the battery modules in the X direction are abutted against the inner wall of the tray so as to fix the plurality of battery modules in the X direction. The layering includes the clamp plate and connects vertical ribbing on the bottom surface of clamp plate, the bottom surface of clamp plate compresses tightly adjacent two the relative side edge department of Y direction of the top surface of battery module, the bottom surface of battery module with the bottom plate butt of tray to it is a plurality of to fix in the Z direction the battery module. The both ends of the X direction of clamp plate are fixed on the tray, vertical ribbing inserts adjacent two gap between the battery module, the orientation of battery module be provided with on one side surface of vertical ribbing and stretch into the elastic bulge in gap, the both sides face of the Y direction of vertical ribbing rather than both sides elastic bulge butt to it is fixed a plurality ofly in the Y direction the battery module. Thus, the fixation (limit) of the battery module in three directions is realized. In addition, the vertical pressing ribs improve the bending rigidity of the cross section of the pressing strip, and can bear larger impact load in the Z direction (because the length of the pressing strip is longer, the fixed points are arranged at two ends of the pressing plate in the X direction, and the middle deflection of the pressing strip is larger during bearing).
In addition, compared with the conventional module structure battery pack, the battery pack has the advantages that the fixing position of the battery core is moved from the end part to the shoulder part of the battery core (two adjacent battery modules are arranged at the edges of the opposite sides of the top surface in the Y direction), more expansion spaces can be provided in the thickness direction of the battery core, and particularly, the battery core with high energy density or silicon cathode can be expanded greatly in the thickness direction (X direction) in the circulating process.
In addition, compare with the scheme of traditional side face lock bolt fixed battery module, this application needs less space on electric core width direction (Y direction).
In addition, compare with the no module group battery package scheme that the structure glued the bonding, this application uses mechanical type to connect, need not the structure and glues supplementarily, and the maintenance of convenient to detach maintenance can carry out the maintenance of electric core pile level and change.
In another aspect, an embodiment of the present invention provides a vehicle, including the battery pack described above.
Drawings
Fig. 1 is an exploded view of a battery pack according to a first embodiment of the present invention;
fig. 2 is a schematic view of a pressing bar of a battery pack according to a first embodiment of the present invention;
fig. 3 is a schematic view of a battery module of a battery pack according to a first embodiment of the present invention;
fig. 4 is a schematic view of an elastic protrusion of a battery pack according to a first embodiment of the present invention;
fig. 5 is a schematic view of a tray of a battery pack provided in a first embodiment of the present invention;
fig. 6 is a cross-sectional view of a battery pack provided in a first embodiment of the present invention, taken along the Y direction;
FIG. 7 is an enlarged view taken at a in FIG. 6;
fig. 8 is a sectional view of a battery module of a battery pack according to a first embodiment of the present invention;
fig. 9 is an enlarged view at b in the figure.
The reference numerals in the specification are as follows:
1. an upper cover;
2. a tray; 21. a base plate; 22. separating ribs; 23. a step surface;
3. layering; 31. pressing a plate; 311. a second mounting hole; 32. vertically pressing ribs; 33. a compressible filler strip; 34. a connecting strip; 341. a first mounting hole;
4. a battery module; 41. an electric core; 42. an end plate; 421. an end plate body; 422. an elastic member; 4221. an arch portion; 4222. a connecting portion; 43. a side plate; 431. an elastic bulge; 432. flanging;
5. a gap;
6. and (4) bolts.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Hereinafter, the X direction is a stacking direction of the battery cells (i.e., a thickness direction of the battery cells), the Y direction is a width direction of the battery cells (i.e., a stacking direction of the battery modules), and the Z direction is a height direction of the battery modules (i.e., a vertical direction of the vehicle), and specific directions are shown by arrows in fig. 1. Of course, this orientation is for convenience of description only and does not limit the orientation of the battery pack when it is specifically used.
First embodiment
As shown in fig. 1 to 9, a battery pack according to a first embodiment of the present invention includes an upper cover 1, a tray 2, a pressing bar 3, and a plurality of battery modules 4 stacked along a Y direction, wherein the upper cover 1 is connected to the tray 2 to enclose a cavity for accommodating the plurality of battery modules 4, two ends of the battery modules 4 in an X direction are abutted to an inner wall of the tray 2 to fix the plurality of battery modules 4 in the X direction, a bottom surface of the battery module 4 is abutted to a bottom plate 21 of the tray 1, and the pressing bar 3 is disposed between two adjacent battery modules in the Y direction.
The upper cover 1 is connected with the tray 2 (the tray at the uppermost layer) in a circle by bolts.
The pressing strip 3 comprises a pressing plate 31 and vertical pressing ribs 32 connected to the bottom surface of the pressing plate 31, and the bottom surface of the pressing plate 31 is pressed at the opposite side edges of the top surfaces of two adjacent battery modules 4 in the Y direction so as to fix the plurality of battery modules 4 in the Z direction; the both ends of the X direction of clamp plate 31 are fixed on the tray 2, vertical ribbing 32 inserts adjacent two gap 5 between the battery module 4, battery module 4's orientation be provided with on vertical ribbing 32's the side surface and stretch into elastic bulge 431 of gap 5, the both sides face of the Y direction of vertical ribbing 32 rather than both sides elastic bulge 431 butt is in order to be fixed a plurality ofly in the Y direction battery module 4.
The end plate 42 includes an end plate body 421 and an elastic member 422 connected to a side of the end plate body 421 away from the cell stack, the elastic member 422 abuts against an inner wall of the tray 2, and a side of the end plate body 421 facing the cell stack abuts against a side of the cell stack in the X direction.
Preferably, the elastic member 422 includes two arched portions 4221 and a connecting portion 4222 connecting the bottoms of the two arched portions 4221, the connecting portion 4222 is attached to a side surface of the end plate body 421 facing away from the core stack, and the top of the arched portion 4221 abuts against the inner wall of the tray 2.
The end plate 42 is fixed on the tray 2 through a bolt perpendicular to the side wall of the tray 2, and a normal pretightening force is provided between the cell stack and the end plate 42 through the action of the elastic piece 422, but the end plate 42 and the cell stack are only abutted without bonding or other connection relations.
The battery module 4 further comprises side plates 43 fixed on two sides of the cell stack in the Y direction by structural adhesive, and a plurality of elastic protrusions 431 arranged in the X direction are arranged on the side plates 43; the top of the side plate 43 faces the pole of the battery cell 41 to form a flange 432 pressed on the top surface of the battery cell 41, and the bottom surface of the pressing plate 31 is pressed on the flange 432. The structural adhesive and the flanges 432 have the functions of integrating the cell stack into a whole and improving the rigidity, and in addition, the flanges 432 can also ensure that the tolerance of the cell 41 in the height direction is consistent, and the pre-tightening force of the pressing strips in the Z direction can be uniformly dispersed to each cell 41.
The plurality of elastic protrusions 431 on the side plate 43 is obtained by punching, that is, punching (punching out a window) on a complete sheet metal, and the punched-out sheet-like portion is suspended at the window to constitute the elastic protrusions 431. Preferably, the plurality of elastic protrusions 431 are arranged at equal intervals.
When the pressing strip 3 is inserted into the gap 5 between two adjacent battery modules 4 in the Y direction, the vertical pressing rib 32 presses the elastic protrusions 431 on the two sides, the elastic protrusions 431 are deformed under pressure, and a pre-tightening force is provided along the Y direction, so that the battery modules 4 are fixed in the Y direction.
The pressing strip 3 further comprises a compressible gasket strip 33, and the compressible gasket strip 33 is arranged at the edge of the bottom surface of the pressing plate 31 and the edge of the opposite side of the top surface of the two adjacent battery modules 4 in the Y direction. The bottom surface of the pressing plate 31 is divided into two crimping surfaces by taking the vertical pressing ribs 32 as boundaries, two compressible gasket strips 33 are correspondingly arranged, one compressible gasket strip 33 is arranged between one crimping surface and the top surface of one battery module 4, and the other compressible gasket strip 33 is arranged between the other crimping surface and the top surface of the other battery module 4.
The compressible spacer 33 has an initial uncompressed thickness of 2-3 mm to provide Z-clamping force and to absorb Z-assembly tolerances by a predetermined amount of compression. That is, in the present application, the layering 3 integrates the compressible filler strip 33 to realize the flexible connection with the battery module 4, solving the assembly tolerance problem.
The compressible padding strip 4 may be, for example, a foam pad.
Be provided with in the tray 2 and stretch into the separation muscle 22 of gap 5, the bottom of separating muscle 22 with the bottom plate 21 of tray 2 is connected, the both sides of the X direction of separating muscle 22 with the both sides wall of the X direction of tray 2 is connected, it will to separate muscle 22 a plurality of subcavities are separated into to the cavity, each battery module 4 holds correspondingly the subcavity, the top of separating muscle 22 with the bottom interval of vertical pressure muscle 32 is relative.
On one hand, the vertical pressing rib 32 improves the bending rigidity of the cross section of the pressing bar, and can bear larger impact load in the Z direction (because the length of the pressing bar 3 is longer, the fixed points are at two ends of the pressing plate 31 in the X direction, and the middle deflection of the pressing bar 3 is larger during bearing). On the other hand, the vertical pressing rib 32 and the separating rib 22 of the tray 2 form a safety mechanism, when the load in the Z direction (downward) is large, and the pressing bar 3 is seriously bent, the bottom of the vertical pressing rib 32 can be in rigid contact with the top of the separating rib 22, and at this time, the gap between the bottom of the pressing bar 3 and the top of the separating rib 22 is filled up, so that the aluminum shell of the battery cell 41 is prevented from bearing beyond the limit and failing.
In the embodiment shown in fig. 5, 2 separating ribs 22 are provided, and 2 separating ribs 22 separate the cavity into 3 sub-cavities, so that 3 battery modules 4 can be placed in each layer of tray 2.
However, other numbers of the partition ribs 22 may be provided as needed according to the number of the battery modules 4.
In this embodiment, the trays 2 are stacked in two layers along the Z direction, the upper cover 1 is fixedly connected to the uppermost tray 2, and the bottom plate 21 of the upper tray 2 is fixed to the upper opening of the lower tray 2.
The pressing strip 3 further comprises a connecting strip 34 arranged on the top surface of the pressing plate 31, and the pressing strip 3 in the upper tray 2 is provided with a first mounting hole 341 for fixedly connecting with the upper cover 1 on the connecting strip 34. The top surface of the connecting bar 34 is used for supporting the upper cover 1 and is screwed into the first mounting hole 341 by the bolt 6 to be fixedly connected with the upper cover 1. The top surface of the connecting strip 34 of the pressing strip 3 in the lower tray 2 is used for supporting the bottom plate 21 of the upper tray 2. The pressing strip 3 in the lower tray 2 can eliminate the first mounting hole 341 on the top surface of the connecting strip 34, so as to simplify the structure of part of the pressing strip 3 and reduce the cost. Preferably, the top surface of the connecting strip 34 is flat to better support the bottom plate 21 of the cover 1 or the tray 2.
Two ends of the pressing plate 31 in the X direction protrude from two ends of the connecting bar 34 in the X direction, and two ends of the pressing plate 31 in the X direction are provided with second mounting holes 311 for fixedly connecting (bolting) with the tray 2.
In this way, the beads 3 of the lower tray 2 are fixed by the bottom plate 21 of the upper tray 2, and excellent structural strength can be obtained. And, the upper layer of the batten 3 provides more supporting points for the upper cover 1, and the upper cover 1 can bear higher load. For example, in the SUV plug-in vehicle type, the upper cover 1 of the battery pack is the trunk. In this way, the luggage case can be subjected to a higher load.
The connecting strips 34, the pressing plate 31 and the vertical pressing ribs 32 are integrally formed to form a main pressing strip part, and the main pressing strip part is an aluminum alloy extruded section for example, so that the strong bending rigidity is obtained.
However, the connecting strip 34, the pressing plate 31 and the vertical bead 32 may be formed separately and fixed integrally (welding, bolting, gluing, etc.).
In addition, the batten 3 can also be made of sheet metal parts or die castings.
Furthermore, the compressible furring strips 33 could also be replaced by rubber, metal leaf springs. Alternatively, the compressible gasket 33 is directly integral with the main portion of the bead or side panel 43, similar to the resilient projection 431 on the side panel 43.
As shown in fig. 1, a gap is formed between the two battery modules 4 on both sides in the Y direction and the inner wall of the tray 2, and here, a pressing bar 3 may also be provided, and the vertical pressing rib 32 of the pressing bar 3 is inserted into the gap between the battery module 4 and the inner wall of the tray 2. Unlike the compression beads 3 between the two battery modules 4, here the compression beads 3 are padded with one of the compressible padding strips 33 between one of the crimping surfaces and the top surface of one of the battery modules 4 and the other compressible padding strip 33 on a step surface 23 (see fig. 5) provided on the other crimping surface and the side wall of the tray 2.
According to the battery pack of the first embodiment of the present invention, both ends of the battery modules in the X direction abut against the inner wall of the tray to fix the plurality of battery modules in the X direction. The layering includes the clamp plate and connects vertical ribbing on the bottom surface of clamp plate, the bottom surface of clamp plate compresses tightly adjacent two the relative side edge department of Y direction of the top surface of battery module, the bottom surface of battery module with the bottom plate butt of tray to it is a plurality of to fix in the Z direction the battery module. The both ends of the X direction of clamp plate are fixed on the tray, vertical ribbing inserts adjacent two gap between the battery module, the orientation of battery module be provided with on one side surface of vertical ribbing and stretch into the elastic bulge in gap, the both sides face of the Y direction of vertical ribbing rather than both sides elastic bulge butt to it is fixed a plurality ofly in the Y direction the battery module. Thus, the fixation (limit) of the battery module in three directions is realized. In addition, the vertical pressing ribs improve the bending rigidity of the cross section of the pressing strip, and can bear larger impact load in the Z direction (because the length of the pressing strip is longer, the fixed points are arranged at two ends of the pressing plate in the X direction, and the middle deflection of the pressing strip is larger during bearing).
In addition, compared with the conventional module structure battery pack, the fixing position of the pressing strip to the battery core is moved from the end part to the shoulder part of the battery core (two adjacent battery modules are arranged at the edges of the opposite sides of the top surface in the Y direction), so that more expansion spaces can be provided in the thickness direction of the battery core, particularly, the battery core with high energy density or silicon cathode can be expanded greatly in the thickness direction (X direction) in the circulating process.
In addition, compare with the scheme of traditional side face lock bolt fixed battery module, this application needs less space on electric core width direction (Y direction).
In addition, compare with the no module group battery package scheme that the structure glued the bonding, this application uses mechanical type to connect, need not the structure and glues supplementarily, and the maintenance of convenient to detach maintenance can carry out the maintenance of electric core pile level and change.
Second embodiment (not shown)
The second embodiment of the present invention provides a battery pack, which is different from the first embodiment in that the tray is provided with only one layer.
Third embodiment (not shown)
A battery pack according to a third embodiment of the present invention is different from the battery pack according to the first embodiment in that three trays are stacked in the Z direction, the upper cover is fixedly connected to the uppermost tray, two adjacent trays are provided, and a bottom plate of the upper tray is fixed to an upper opening of the lower tray. Namely, from top to bottom, upper cover and first layer tray fixed connection, the upper portion opening part at second layer tray is fixed to the bottom plate of first layer tray, and the upper portion opening part at third layer tray is fixed to the bottom plate of second layer tray.
A plurality of battery modules are arranged in each layer of tray along the Y direction.
Fourth embodiment
A battery pack according to a fourth embodiment of the present invention is different from the battery pack according to the first embodiment in that a bead is integrated with a bottom surface of the upper cover. That is, the pressing bar in the tray of the upper layer is integrated with the upper cover to simplify the structure. The batten in the lower tray can be integrated with or independent of the bottom plate of the upper tray.
In addition, an embodiment of the present invention provides a vehicle including the battery pack of the above embodiment.
The vehicle may be a hybrid vehicle or a purely electric vehicle.
Plug-in hybrid vehicle models in hybrid vehicles often are placed inside the vehicle, under the trunk or under the rear passenger seat, due to the common fuel vehicle platform and the small size of the battery pack. The battery pack is also arranged in the vehicle body due to various considerations such as mechanical protection and heat preservation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A battery pack is characterized by comprising an upper cover, a tray, a pressing strip and a plurality of battery modules stacked along the Y direction, wherein the upper cover is connected with the tray to form a cavity for containing the plurality of battery modules in a surrounding manner, two ends of each battery module in the X direction are abutted with the inner wall of the tray so as to fix the plurality of battery modules in the X direction, the bottom surface of each battery module is abutted with the bottom plate of the tray, and the pressing strip is arranged between every two adjacent battery modules in the Y direction;
the pressing strip comprises a pressing plate and vertical pressing ribs connected to the bottom surface of the pressing plate, and the bottom surface of the pressing plate is tightly pressed at the opposite side edges of the top surfaces of two adjacent battery modules in the Y direction so as to fix the plurality of battery modules in the Z direction; the both ends of the X direction of clamp plate are fixed on the tray, vertical ribbing inserts adjacent two gap between the battery module, the orientation of battery module be provided with on one side surface of vertical ribbing and stretch into the elastic bulge in gap, the both sides face of the Y direction of vertical ribbing rather than both sides elastic bulge butt to it is fixed a plurality ofly in the Y direction the battery module.
2. The battery pack according to claim 1, wherein the battery module includes a cell stack formed by stacking a plurality of cells in an X direction, and end plates pressed on both sides of the cell stack in the X direction, wherein a side of the end plate facing away from the cell stack is fixed on the tray, and a side of the end plate facing the cell stack abuts against a side of the cell stack in the X direction.
3. The battery pack according to claim 1, wherein the end plate includes an end plate body and an elastic member connected to a side of the end plate body facing away from the cell stack, the elastic member abutting against an inner wall of the tray, and a side of the end plate body facing the cell stack abutting against a side of the cell stack in the X direction.
4. The battery pack according to claim 3, wherein the elastic member includes two arched portions and a connecting portion connecting bottom portions of the two arched portions, the connecting portion is attached to a side surface of the end plate body facing away from the cell stack, and top portions of the arched portions abut against an inner wall of the tray.
5. The battery pack according to claim 1, wherein the battery module further comprises side plates fixed to both sides of the cell stack in the Y direction, the side plates being provided with a plurality of the elastic protrusions arranged in the X direction;
the top of the side plate faces to the pole of the battery cell to form a turned edge pressed on the top surface of the battery cell, and the bottom surface of the pressing plate is pressed on the turned edge.
6. The battery pack of claim 1, wherein the compression beads further comprise compressible gasket beads disposed at the Y-direction opposite side edges of the bottom surface of the compression plate and the top surfaces of two adjacent battery modules.
7. The battery pack of claim 1, wherein the compression bar further comprises a connecting strip disposed on the top surface of the compression plate, the top surface of the connecting strip being attached to the bottom surface of the upper cover; the connecting strip is provided with a first mounting hole which is used for being fixedly connected with the upper cover.
8. The battery pack according to claim 7, wherein both ends of the pressing plate in the X direction protrude from both ends of the connecting bar in the X direction, and the both ends of the pressing plate in the X direction are provided with second mounting holes for fixedly connecting with the tray.
9. The battery pack according to claim 1, wherein a partition rib extending into the gap is provided in the tray, the bottom of the partition rib is connected to the bottom plate of the tray, two sides of the partition rib in the X direction are connected to two side walls of the tray in the X direction, the cavity is partitioned into a plurality of sub-cavities by the partition rib, each battery module is accommodated in the corresponding sub-cavity, and the top of the partition rib is spaced from the bottom of the vertical rib.
10. The battery pack according to any one of claims 1 to 9, wherein the tray is stacked in a plurality of layers in the Z direction, a plurality of battery modules are arranged in each layer of the tray in the Y direction, the upper cover is fixedly connected to the uppermost tray, two adjacent layers of the tray are fixed to the bottom plate of the upper tray at the upper opening of the lower tray.
11. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011348922.3A CN114552110A (en) | 2020-11-26 | 2020-11-26 | Battery pack and vehicle |
| PCT/CN2021/100302 WO2022110768A1 (en) | 2020-11-26 | 2021-06-16 | Battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011348922.3A CN114552110A (en) | 2020-11-26 | 2020-11-26 | Battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114552110A true CN114552110A (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011348922.3A Pending CN114552110A (en) | 2020-11-26 | 2020-11-26 | Battery pack and vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN114552110A (en) |
| WO (1) | WO2022110768A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023025205A1 (en) * | 2021-08-27 | 2023-03-02 | 北京车和家信息技术有限公司 | Battery pack and vehicle |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115275538A (en) * | 2022-08-17 | 2022-11-01 | 湖北亿纬动力有限公司 | Bottom support assembly, battery module and battery pack |
| CN115172979B (en) * | 2022-08-30 | 2023-06-20 | 江苏时代新能源科技有限公司 | Battery module, battery and power consumption device |
| CN116111176B (en) * | 2023-03-22 | 2023-11-10 | 上海君屹工业自动化股份有限公司 | Battery pack processing equipment capable of aligning battery cells and working method thereof |
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| WO2016084272A1 (en) * | 2014-11-28 | 2016-06-02 | 三洋電機株式会社 | Battery pack and vehicle equipped with same |
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| Publication number | Publication date |
|---|---|
| WO2022110768A1 (en) | 2022-06-02 |
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