WO2022110768A1 - Bloc-batterie et véhicule - Google Patents

Bloc-batterie et véhicule Download PDF

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Publication number
WO2022110768A1
WO2022110768A1 PCT/CN2021/100302 CN2021100302W WO2022110768A1 WO 2022110768 A1 WO2022110768 A1 WO 2022110768A1 CN 2021100302 W CN2021100302 W CN 2021100302W WO 2022110768 A1 WO2022110768 A1 WO 2022110768A1
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WO
WIPO (PCT)
Prior art keywords
tray
battery pack
battery
pressing
pack according
Prior art date
Application number
PCT/CN2021/100302
Other languages
English (en)
Chinese (zh)
Inventor
钱诚
周燕飞
张中林
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Publication of WO2022110768A1 publication Critical patent/WO2022110768A1/fr

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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
    • 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
    • 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
    • H01M50/258—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
    • H01M50/262—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

Definitions

  • the invention belongs to the technical field of new energy vehicles, and in particular relates to a battery pack and a vehicle.
  • the battery pack of the hybrid vehicle can only be arranged in the existing body.
  • the space size is limited and more cells need to be arranged, which puts forward higher requirements for the volume utilization rate of the battery pack.
  • the Chinese patent application with the application number "CN201920056136.2” discloses a module-free battery pack, which has a battery pack sheet metal box and a number of series-connected cells placed inside the battery pack sheet metal box; the cells are in a rectangular array. It is arranged in the inner cavity of the battery pack sheet metal box, and is in contact with the inner wall of the battery pack sheet metal box. The tops of the cells arranged in the same row are pressed by the cell pressure bars; The grooves in the middle of the bracket are matched, and the cell pressure strip is fixed with the fixing screw and the pressure strip fixing base; the pressure strip fixing base and the battery pack sheet metal box are fixed by the mounting screws.
  • the bead is flat, the bearing capacity of the bead under the Z-direction (vertical direction) impact load is insufficient, and the deformation at the middle position is large.
  • the X direction (the stacking direction of the battery cells) and the Y direction (the stacking direction of the battery cell modules) of the battery module are not fixed, and the battery module is easy to move in the battery pack, which affects the safety of the battery pack.
  • the technical problem to be solved by the present invention is to provide a battery pack and a vehicle in view of the problem of the existing non-module battery pack, the bead is flat, and the bearing capacity of the bead is insufficient under the Z-direction impact load.
  • an embodiment of the present invention provides a battery pack, including an upper cover, a tray, a bead, and a plurality of battery modules stacked along the Y direction, and the upper cover is connected to the tray to enclose it.
  • a cavity for accommodating a plurality of the battery modules is formed, and both ends of the battery modules in the X direction are in contact with the inner wall of the tray to fix the plurality of battery modules in the X direction.
  • the bottom surface of the battery module is in contact with the bottom plate of the tray, and the pressure strip is arranged between two adjacent battery modules in the Y direction;
  • the pressing strip includes a pressing plate and a vertical pressing rib connected to the bottom surface of the pressing plate, and the bottom surface of the pressing plate is pressed against the opposite side edges in the Y direction of the top surfaces of the two adjacent battery modules, so that the A plurality of the battery modules are fixed in the Z direction; both ends of the pressing plate in the X direction are fixed on the tray, and the vertical pressing ribs are inserted into the gap between two adjacent battery modules,
  • the side surface of the battery module facing the vertical pressure rib is provided with elastic protrusions extending into the gap, the two sides of the vertical pressure rib in the Y direction and the elastic protrusions on both sides thereof abutting, so as to fix a plurality of the battery modules in the Y direction.
  • the battery module includes a cell stack formed by stacking a plurality of cells in the X direction, and end plates pressed on both sides of the cell stack in the X direction.
  • the side of the end plate facing away from the cell stack is fixed on the tray, and the side of the end plate facing the cell stack abuts the side of the cell stack in the X direction.
  • the end plate includes an end plate body and an elastic member connected to a side of the end plate body away from the battery stack, the elastic member abuts against the inner wall of the tray , the side of the end plate body facing the cell stack abuts the side of the cell stack in the X direction.
  • the elastic member includes two arched portions and a connecting portion connecting bottoms of the two arched portions, the connecting portion is attached to a portion of the end plate body facing away from the battery cell On one side surface of the stack, the top of the arch portion abuts on the inner wall of the tray.
  • the battery module further includes side plates fixed on both sides of the cell stack in the Y direction, the side plates are provided with a plurality of the elastics arranged along the X direction bulge;
  • the top of the side plate is formed with a flange pressed against the top surface of the battery core toward the pole post of the battery core, and the bottom surface of the pressing plate is pressed on the flange.
  • the pressure strip further includes a compressible spacer, and the compressible spacer is arranged in the Y direction between the bottom surface of the pressure plate and the top surfaces of the two adjacent battery modules. at the opposite side edge.
  • the pressing bar further includes a connecting bar arranged on the top surface of the pressing plate, and the top surface of the connecting bar is in contact with the bottom surface of the upper cover; in the first mounting hole fixedly connected with the upper cover.
  • the two ends of the pressing plate in the X direction protrude from the two ends of the connecting bar in the X direction, and the two ends of the pressing plate in the X direction are provided with a fixed connection to the tray. Second mounting hole.
  • the tray is provided with a partition rib extending into the gap, the bottom of the partition rib is connected to the bottom plate of the tray, and the two sides of the partition rib in the X direction are connected to the bottom of the tray.
  • the two side walls in the X direction of the tray are connected, and the separation rib divides the cavity into a plurality of sub-cavities, each of the battery modules is accommodated in the corresponding sub-cavity, and the top of the separation rib is connected to the sub-cavity.
  • the bottoms of the vertical pressure ribs are spaced opposite to each other.
  • the trays are stacked in multiple layers along the Z direction, each layer of the trays is provided with a plurality of the battery modules along the Y direction, and the upper cover is connected to the uppermost tray. Fixed connection, two adjacent layers of the trays, the bottom plate of the upper tray is fixed at the upper opening of the lower tray.
  • both ends of the battery module in the X direction are in contact with the inner wall of the tray, so as to fix a plurality of the battery modules in the X direction.
  • the pressing bar includes a pressing plate and a vertical pressing rib connected to the bottom surface of the pressing plate, and the bottom surface of the pressing plate is pressed against the opposite side edges in the Y direction of the top surfaces of the two adjacent battery modules, so The bottom surface of the battery module is in contact with the bottom plate of the tray, so as to fix a plurality of the battery modules in the Z direction.
  • Both ends of the pressing plate in the X direction are fixed on the tray, the vertical pressing rib is inserted into the gap between the two adjacent battery modules, and the battery module faces the vertical pressing rib.
  • One side surface of the rib is provided with elastic protrusions extending into the gap, and the two sides of the vertical pressing rib in the Y direction are in contact with the elastic protrusions on both sides, so as to fix a plurality of elastic protrusions in the Y direction. the battery module.
  • the fixing (position limit) of the battery module in three directions is realized.
  • the vertical beading improves the bending stiffness of the bead section, and can carry a larger impact load in the Z direction (due to the long length of the bead, the fixing points are at both ends of the bead in the X direction, and the middle deflection of the bead during loading bigger).
  • the fixing position of the cell is moved from the end to the shoulder of the cell (the opposite side edges in the Y direction of the top surfaces of the two adjacent battery modules). ), which can provide more expansion space in the thickness direction of the cell, especially for cells with high energy density or silicon negative electrodes, which will experience relatively large expansion along the thickness direction (X direction) during the cycle.
  • the present application requires less space in the width direction (Y direction) of the battery cells.
  • the present application uses mechanical connection without the assistance of structural adhesive, which is convenient for disassembly and maintenance, and can be repaired and replaced at the cell stack level.
  • an embodiment of the present invention provides a vehicle including the above-mentioned battery pack.
  • FIG. 1 is an exploded view of a battery pack provided by a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a bead of a battery pack provided by the first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a battery module of a battery pack provided by the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an elastic protrusion of a battery pack provided by the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a tray of a battery pack provided by the first embodiment of the present invention.
  • FIG. 6 is a cross-sectional view along the Y direction of the battery pack provided by the first embodiment of the present invention.
  • Fig. 7 is an enlarged view at a place in Fig. 6;
  • FIG. 8 is a cross-sectional view of the battery module of the battery pack provided by the first embodiment of the present invention.
  • Fig. 9 is an enlarged view at b in the figure.
  • FIG. 10 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
  • Battery module 41. Cell; 42. End plate; 421, End plate body; 422, Elastic part; 4221, Arched part; , flanging;
  • the X direction is the stacking direction of the battery cells (that is, the thickness direction of the battery cells)
  • the Y direction is the width direction of the battery cells (that is, the stacking direction of the battery module)
  • the Z direction is the height direction of the battery module ( That is, the vertical direction of the vehicle)
  • the specific orientation is shown by the arrow in FIG. 1 .
  • this orientation is only for the convenience of description, and does not limit the orientation of the battery pack in specific applications.
  • the battery pack provided by the first embodiment of the present application includes an upper cover 1 , a tray 2 , a bead 3 and a plurality of battery modules 4 stacked along the Y direction.
  • the upper cover 1 and the tray 2 are connected to form a cavity for accommodating a plurality of the battery modules 4, and both ends of the battery modules 4 in the X direction are in contact with the inner wall of the tray 2, so as to be fixed in the X direction.
  • Each of the battery modules 4, the bottom surface of the battery module 4 is in contact with the bottom plate 21 of the tray 1, and the bead 3 is disposed between two adjacent battery modules in the Y direction.
  • the circumference of the upper cover 1 and the tray 2 (the uppermost tray) are connected by bolts.
  • the pressing bar 3 includes a pressing plate 31 and a vertical pressing rib 32 connected to the bottom surface of the pressing plate 31 .
  • the bottom surface of the pressing plate 31 is pressed against the Y direction of the top surfaces of the two adjacent battery modules 4 .
  • a plurality of the battery modules 4 are fixed in the Z direction; the two ends of the pressing plate 31 in the X direction are fixed on the tray 2 , and the vertical pressing ribs 32 are inserted into the adjacent two
  • the gap 5 between the battery modules 4, the side surface of the battery module 4 facing the vertical pressure rib 32 is provided with an elastic protrusion 431 extending into the gap 5, the vertical
  • the two sides of the pressing rib 32 in the Y direction are in contact with the elastic protrusions 431 on both sides thereof, so as to fix the plurality of battery modules 4 in the Y direction.
  • the battery module 4 includes a cell stack formed by stacking a plurality of cells 41 in the X direction, and end plates 42 pressed against both sides of the cell stack in the X direction.
  • One side of the cell stack is fixed on the tray 2 , and the side of the end plate 42 facing the cell stack abuts the side of the cell stack in the X direction.
  • 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 battery stack.
  • the elastic member 422 is in contact with the inner wall of the tray 2 .
  • the side of the end plate body 421 facing the cell stack abuts the side of the cell stack in the X direction.
  • the elastic member 422 includes two arched portions 4221 and a connecting portion 4222 connecting the bottoms of the two arched portions 4221 , and the connecting portion 4222 is attached to the end plate body 421 The top of the arch portion 4221 abuts on the inner wall of the tray 2 on the side surface away from the cell stack.
  • the end plate 42 is fixed on the tray 2 by bolts perpendicular to the side wall of the tray 2. Through the action of the elastic member 422, there is a normal preload between the cell stack and the end plate 42, but the end plate 42 and the cell stack have a normal preload. Abutment only, no bonding or other connection.
  • the battery module 4 also includes side plates 43 fixed on both sides of the cell stack in the Y direction by structural adhesive, and the side plates 43 are provided with a plurality of the elastic protrusions 431 arranged along the X direction. ;
  • the top of the side plate 43 is formed with a flange 432 pressed against the top surface of the battery core 41 toward the pole of the battery core 41 , and the bottom surface of the pressure plate 31 is pressed against the flange 432 superior.
  • the function of the structural adhesive and the flanging 432 is to make the cell stack form a whole and improve the rigidity.
  • the flanging 432 can also ensure that the tolerance in the height direction of the cell 41 is consistent, and the pre-tightening force in the Z direction of the bead can be evenly distributed.
  • Each cell 41 .
  • the plurality of elastic protrusions 431 on the side plate 43 are obtained by punching, that is, a complete sheet metal is punched (punched out of the window), and the punched sheet-like part is suspended at the window to form the The elastic protrusion 431 is described.
  • the plurality of elastic protrusions 431 are arranged at equal intervals.
  • the vertical pressure ribs 32 press the elastic protrusions 431 on both sides, and the elastic protrusions 431 are deformed under pressure, and provide preload, thereby fixing the battery module 4 in the Y direction.
  • the pressure strip 3 further includes a compressible spacer strip 33, and the compressible spacer strip 33 is cushioned at the opposite side edges in the Y direction between the bottom surface of the pressure plate 31 and the top surfaces of the two adjacent battery modules 4. .
  • the bottom surface of the pressing plate 31 is divided into two crimping surfaces with the vertical pressing ribs 32 as the boundary. Between one of the crimping surfaces and the top surface of one of the battery modules 4 , the other compressible gasket 33 is cushioned between the other crimping surface and the top surface of the other battery module 4 .
  • the initial uncompressed thickness of the compression pad 33 is 2-3 mm, and a preset compression amount provides Z-direction clamping force and absorbs Z-direction assembly tolerance. That is, in the present application, the bead 3 is integrated with the compressible gasket 33 to realize the soft connection with the battery module 4, and solve the problem of assembly tolerance.
  • the compression pad 4 may be, for example, a foam pad.
  • the tray 2 is provided with a partition rib 22 extending into the gap 5 , the bottom of the partition rib 22 is connected to the bottom plate 21 of the tray 2 , and the two sides of the partition rib 22 in the X direction Connected with the two side walls in the X direction of the tray 2, the separating ribs 22 divide the cavity into a plurality of sub-cavities, each of the battery modules 4 is accommodated in the corresponding sub-cavities, and the The top of the separating rib 22 is spaced opposite to the bottom of the vertical pressing rib 32 .
  • the vertical bead 32 improves the bending stiffness of the bead section, and can carry a large impact load in the Z direction (due to the long length of the bead 3, the fixing points are at both ends of the pressure plate 31 in the X direction, and when the bead 31 is loaded, the fixed point is The middle deflection of the bead 3 is relatively large).
  • the vertical pressing rib 32 and the separating rib 22 of the pallet 2 constitute a safety mechanism. When the load in the Z direction (downward) is large and the pressing bar 3 is severely bent, the bottom of the vertical pressing rib 32 will be in contact with the separating rib. The top of 22 is in rigid contact, and at this time, the gap between the bottom of the bead 3 and the top of the separation rib 22 is filled, so as to avoid failure of the aluminum shell of the battery cell 41 if the load exceeds the limit.
  • 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 lower tray 2 . at the upper opening of the tray 2 .
  • the pressure strip 3 also includes a connecting strip 34 arranged on the top surface of the pressure plate 31 , and the pressure strip 3 in the upper tray 2 is provided with a first installation for fixed connection with the upper cover 1 on the connecting strip 34 . Hole 341.
  • the top surface of the connecting bar 34 is used to support the upper cover 1 and is fixedly connected to the upper cover 1 by screwing the bolts 6 into the first mounting holes 341 .
  • the top surface of the connecting bar 34 of the bead 3 in the lower tray 2 is used to support the bottom plate 21 of the upper tray 2 .
  • the first mounting hole 341 on the top surface of the connection bar 34 can be eliminated, so as to simplify the structure of part of the bead 3 and reduce the cost.
  • the top surface of the connecting bar 34 is flat, so as to better support the upper cover 1 or the bottom plate 21 of the tray 2 .
  • Both ends of the pressing plate 31 in the X direction protrude from the two ends of the connecting bar 34 in the X direction, and the two ends of the pressing plate 31 in the X direction are provided with No. Two mounting holes 311 .
  • the bottom plate 21 of the upper tray 2 to fix the bead 3 of the lower tray 2, excellent structural strength can be obtained.
  • the bead 3 on the upper layer provides more support points for the upper cover 1, and the upper cover 1 can bear a higher load.
  • the upper cover 1 of the battery pack is the luggage compartment. In this way, the luggage can be subjected to higher loads.
  • the connecting bar 34 , the pressing plate 31 and the vertical pressing rib 32 are integrally formed to form the main body part of the beading bar.
  • connecting bar 34, the pressing plate 31 and the vertical pressing rib 32 are respectively formed and then fixed into one body (welding, bolting, gluing, etc.).
  • bead 3 can also be a sheet metal part or a die casting part.
  • the compressible spacer strip 33 can also be replaced by rubber or metal leaf springs.
  • the compressible spacer strip 33 is directly integrated with the bead body portion or side panel 43, similar to the resilient protrusions 431 on the side panel 43.
  • 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 .
  • a pressure bar 3 can also be provided, and the vertical pressure ribs 32 of the pressure bar 3 are inserted into the battery mold. Gap between group 4 and the inner wall of tray 2.
  • the difference from the pressure strip 3 between the two battery modules 4 is that, in the pressure strip 3 here, a piece of the compressible gasket 33 is cushioned between one of the crimping surfaces and the top surface of one of the battery modules 4 .
  • the other compressible gasket 33 is arranged on another crimping surface and a stepped surface 23 (see FIG. 5 ) provided on the side wall of the tray 2 .
  • both ends of the battery module 4 in the X direction are in contact with the inner wall of the tray 2 to fix a plurality of the battery modules 4 in the X direction.
  • the pressing bar 3 includes a pressing plate 31 and a vertical pressing rib 32 connected to the bottom surface of the pressing plate 31 .
  • the bottom surface of the pressing plate 31 is pressed against the Y direction of the top surfaces of the two adjacent battery modules 4 .
  • the bottom surface of the battery module 4 is in contact with the bottom plate of the tray 2 to fix a plurality of the battery modules 4 in the Z direction.
  • Both ends of the pressing plate 31 in the X direction are fixed on the tray 2 , the vertical pressing ribs 32 are inserted into the gap between two adjacent battery modules 4 , and the direction of the battery modules 4 is
  • One side surface of the vertical pressure rib 32 is provided with elastic protrusions extending into the gap, and the two sides of the vertical pressure rib 32 in the Y direction are in contact with the elastic protrusions on both sides to prevent A plurality of the battery modules 4 are fixed in the Y direction. In this way, the fixing (position limit) of the battery module 4 in three directions is realized.
  • the vertical pressure rib 32 improves the bending stiffness of the bead section, and can bear a large impact load in the Z direction (due to the long length of the bead, the fixed points are at both ends of the pressure plate 31 in the X direction, and the bead's The middle deflection is relatively large).
  • the fixing position of the bead to the cell is moved from the end to the shoulder of the cell (the opposite side in the Y direction of the top surfaces of the two adjacent battery modules 4). edge), more expansion space can be provided in the thickness direction of the cell, especially for cells with high energy density or silicon anodes, which will experience relatively large expansion along the thickness direction (X direction) during the cycle.
  • the present application requires less space in the width direction (Y direction) of the battery cells.
  • the present application uses mechanical connection without the assistance of structural adhesive, which is convenient for disassembly and maintenance, and can be repaired and replaced at the cell stack level.
  • the battery pack provided by the second embodiment of the present application is different from the first embodiment in that the tray 2 is provided with only one layer.
  • the third embodiment (not shown)
  • the battery pack provided by the third embodiment of the present application is different from the first embodiment in that the trays 2 are stacked in three layers along the Z direction, the upper cover is fixedly connected to the uppermost tray 2, and the adjacent There are two layers of the trays 2 , and the bottom plate of the upper tray 2 is fixed at the upper opening of the lower tray 2 . That is, from top to bottom, the upper cover is fixedly connected to the first layer tray 2, the bottom plate of the first layer tray 2 is fixed at the upper opening of the second layer tray 2, and the bottom plate of the second layer tray 2 is fixed to the third layer tray 2. The upper opening of the layer tray 2.
  • a plurality of battery modules 4 are arranged in each layer of trays 2 along the Y direction.
  • the battery pack provided by the fourth embodiment of the present application is different from the first embodiment in that the bottom surface of the upper cover is integrated with a bead. That is, the bead in the upper tray 2 is integrated with the upper cover to simplify the structure.
  • the bead in the lower tray 2 can be integrated with the bottom plate of the upper tray 2 or be provided independently.
  • an embodiment of the present application provides a vehicle 7 including the battery pack 8 of the above embodiment.
  • the vehicle may be a hybrid vehicle or a pure electric vehicle.
  • the plug-in hybrid vehicles in hybrid vehicles share the platform of the fuel vehicle and the battery pack size is small, so they are often placed inside the vehicle, under the trunk or under the rear passenger seat.
  • the battery pack will also be arranged in the body.

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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

La présente invention porte sur un bloc-batterie et sur un véhicule. Le bloc-batterie comprend un couvercle supérieur, un plateau, des bandes de pressage et une pluralité de modules de batterie. Deux extrémités de chaque module de batterie dans la direction X sont en butée contre la paroi interne du plateau, et les bandes de pressage sont disposées entre deux modules de batterie adjacents dans la direction Y. Chaque bande de pressage comprend une plaque de pressage et une nervure de pressage verticale reliée à la surface inférieure de la plaque de pressage, et la surface inférieure de la plaque de pressage presse des bords de côtés opposés des surfaces supérieures des deux modules de batterie adjacents dans la direction Y. Deux extrémités de la plaque de pressage dans la direction X sont fixées sur le plateau. La nervure de pressage verticale est insérée dans un espace entre les deux modules de batterie adjacents. Une saillie élastique s'étendant dans l'espace est disposée sur la surface latérale du module de batterie faisant face à la nervure de pressage verticale. Deux surfaces latérales de la nervure de pressage verticale dans la direction Y sont en butée contre les saillies élastiques sur les deux côtés de celle-ci.
PCT/CN2021/100302 2020-11-26 2021-06-16 Bloc-batterie et véhicule WO2022110768A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011348922.3A CN114552110A (zh) 2020-11-26 2020-11-26 电池包及车辆
CN202011348922.3 2020-11-26

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Publication Number Publication Date
WO2022110768A1 true WO2022110768A1 (fr) 2022-06-02

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Application Number Title Priority Date Filing Date
PCT/CN2021/100302 WO2022110768A1 (fr) 2020-11-26 2021-06-16 Bloc-batterie et véhicule

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CN (1) CN114552110A (fr)
WO (1) WO2022110768A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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