CN110444835B - Battery pack and vehicle - Google Patents

Battery pack and vehicle Download PDF

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Publication number
CN110444835B
CN110444835B CN201910810366.8A CN201910810366A CN110444835B CN 110444835 B CN110444835 B CN 110444835B CN 201910810366 A CN201910810366 A CN 201910810366A CN 110444835 B CN110444835 B CN 110444835B
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China
Prior art keywords
heat dissipation
heat
battery pack
insulating
mounting
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CN201910810366.8A
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Chinese (zh)
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CN110444835A (en
Inventor
王珏
张海建
曲凡多
李建昌
亢策策
周征利
田旭光
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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Priority to CN201910810366.8A priority Critical patent/CN110444835B/en
Publication of CN110444835A publication Critical patent/CN110444835A/en
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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6562—Gases with free flow by convection only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a battery pack and a vehicle. The battery pack includes: the heat dissipation device comprises a shell, a heat dissipation device and a heat dissipation device, wherein a plurality of mounting grooves and heat dissipation channels are formed in the shell, and the mounting grooves are communicated with the heat dissipation channels; the electric core groups are arranged in the mounting grooves; and the explosion-proof valve is suitable for communicating the heat dissipation channel with the outside. According to the battery pack, the plurality of electric core groups are arranged in the plurality of mounting grooves, and the plurality of mounting grooves are communicated with the heat dissipation channel, so that heat flow direction can be guided, heat spreading is prevented to the maximum extent, the risk of fire and explosion is relieved, loss caused by thermal runaway is reduced, and maintenance cost is reduced.

Description

Battery pack and vehicle
Technical Field
The invention relates to the field of automobiles, in particular to a battery pack and a vehicle.
Background
With the national vigorous popularization of new energy fields, electric vehicles have become the mainstream trend in the future, and the pursuit of high energy density becomes the mainstream of research on power batteries. However, high energy density is accompanied by high safety risks, and thermal runaway and thermal spread lead to frequent explosions and fires.
At present, thermal insulation is carried out by adding thermal insulation materials among the electric cores in the market, the thermal insulation materials can only slow down heat transfer among the electric cores, but after one electric core is out of control due to heat, the thermal insulation materials cannot effectively isolate sprayed high-heat and high-energy electrolyte, and heat spreading is serious.
Disclosure of Invention
Accordingly, the present invention is directed to a battery pack for guiding hot air and preventing heat spreading.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a battery pack includes: the heat dissipation device comprises a shell, a heat dissipation device and a heat dissipation device, wherein a plurality of mounting grooves and heat dissipation channels are formed in the shell, and the mounting grooves are communicated with the heat dissipation channels; the electric core groups are arranged in the mounting grooves; and the explosion-proof valve is suitable for communicating the heat dissipation channel with the outside.
According to some embodiments of the invention, the housing comprises: a lower housing; the upper shell is matched with the lower shell to define an installation space; at least one crossbeam, the crossbeam is located in the installation space, adjacent two inject between the crossbeam or the crossbeam with inject between the boundary beam of casing down the mounting groove, at least one end of crossbeam has dodges the breach, dodge the breach with inject between the last casing heat dissipation channel.
Furthermore, the periphery of the upper shell is connected with the edge beam through a fastener, a first heat-insulating sealing piece is arranged between the periphery of the upper shell and the edge beam, the upper shell is connected with the cross beam through a fastener, and a second heat-insulating sealing piece is arranged between the upper shell and the cross beam.
Further, the upper surface of the upper shell is provided with a containing groove, the fastening piece is connected with the bottom wall of the containing groove and the cross beam, at least one part of a nut of the fastening piece is located in the containing groove, the periphery of the upper shell is bent to form a concave part, the containing groove is communicated with the concave part, and in the vertical direction, the lowest point of the concave part is lower than the lowest point of the containing groove.
Furthermore, the lower surface of the peripheral edge of the upper shell is provided with a thickened part protruding downwards, the thickened part is in sealing fit with the edge beam of the lower shell, and the thickened part surrounds the outer side of the first heat-insulating sealing element to limit the first heat-insulating sealing element.
According to some embodiments of the present invention, the lower surface of the upper housing is provided with a mounting protrusion protruding downward, the mounting protrusion corresponds to the position of the accommodating groove, the mounting protrusion is in sealing fit with the cross beam, and the mounting protrusion has a trace notch.
According to some embodiments of the invention, the upper housing comprises: an upper case body; and the heat insulation layer is arranged on one side of the upper shell body, which faces the electric core group.
According to some embodiments of the invention, the electric core pack comprises: the stacking end plate divides the mounting groove into a first sub-mounting groove and a second sub-mounting groove; a plurality of cells, wherein a portion of the cell stacks are disposed on one side of the stack end plate and another portion of the cell stacks are disposed on another side of the stack end plate; the clamping end plate is arranged at two ends of the battery cell in a stacking mode, the heat dissipation channels are two and are respectively a first heat dissipation channel and a second heat dissipation channel, the first sub-mounting groove is communicated with the first heat dissipation channel, and the second sub-mounting groove is communicated with the second heat dissipation channel.
Further, two adjacent at least one place between the electric core, between centre gripping end plate and the electric core, between electric core and the end plate of piling up is equipped with first insulating layer, electric core with be equipped with the second insulating layer between the crossbeam, at least one in first insulating layer and the second insulating layer includes: a thermally insulating body; the heat insulation frame surrounds the heat insulation main body, and the compressibility degree of the heat insulation frame is lower than that of the heat insulation main body.
Compared with the prior art, the battery pack has the following advantages:
install in a plurality of mounting grooves through a plurality of electric core groups, and a plurality of mounting grooves and heat dissipation channel intercommunication can realize the water conservancy diversion to the thermal current, and furthest prevents that heat from stretching, slows down the risk of explosion on fire, reduces the loss of thermal runaway simultaneously, reduces cost of maintenance.
Another object of the present invention is to provide a vehicle including the battery pack of the above embodiment.
Compared with the prior art, the vehicle has the same advantages as the battery pack, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a battery pack according to an embodiment of the present invention;
fig. 2 is a top view of a battery pack according to an embodiment of the present invention;
fig. 3 is a sectional view of a battery pack according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of FIG. 3 at circle A;
FIG. 5 is an enlarged schematic view of FIG. 3 at circle B;
fig. 6 is a schematic view of an angle of an upper case of a battery pack according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of FIG. 6 at circle C;
fig. 8 is a schematic view of another angle of the upper case of the battery pack according to the embodiment of the present invention;
FIG. 9 is an enlarged schematic view of FIG. 8 at circle D;
fig. 10 is a sectional view of an upper case of a battery pack according to an embodiment of the present invention;
FIG. 11 is an enlarged schematic view of FIG. 10 at circle E;
fig. 12 is an exploded view of the electric core pack of the battery pack according to the embodiment of the present invention;
fig. 13 is a schematic structural view of a first adiabatic sealing member and a second adiabatic sealing member of a battery pack according to an embodiment of the present invention.
Description of reference numerals:
a battery pack 100,
The heat dissipation structure comprises a housing 2, a mounting space 201, a mounting groove 202, a first sub-mounting groove 202a, a second sub-mounting groove 202b, a heat dissipation channel 203, a first heat dissipation channel 203a, a second heat dissipation channel 203b, a boundary beam 22, a lower housing 23, a cross beam 24, an avoidance notch 241, an upper housing 25, a mounting convex portion 251, a receiving groove 252, a concave portion 253, a thickened portion 254, a routing notch 255, an upper housing body 256, a heat insulation layer 257, a heat insulation layer,
The electric core group 4, the electric core 41, the clamping end plate 42, the stacking end plate 43, the first heat-insulating layer 44, the second heat-insulating layer 45, the heat-insulating main body 46, the heat-insulating frame 47,
Explosion-proof valve 6, first heat insulating seal 61, second heat insulating seal 62.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to fig. 1 to 13 in conjunction with examples.
Referring to fig. 1, a battery pack 100 according to an embodiment of the present invention includes: the explosion-proof valve comprises a shell 2, a plurality of electric core groups 4 and an explosion-proof valve 6.
Specifically, the housing 2 has a plurality of mounting grooves 202 and a heat dissipation channel 203 therein, the mounting grooves 202 are communicated with the heat dissipation channel 203, the electric core pack 4 is mounted in the mounting grooves 202, and the explosion-proof valve 6 can be communicated with the heat dissipation channel 203 and the outside. Alternatively, the explosion-proof valve 6 may be disposed at the outlet end of the heat dissipation channel 203.
Therefore, the installation grooves 202 are spaced apart to form independent spaces, so that the electric core groups 4 are spaced apart, and heat generated during the operation of each electric core group 4 can enter the heat dissipation channel 203 along the installation grooves 202 and then be discharged through the explosion-proof valve 6.
The setting up of a plurality of mounting grooves 202 and heat dissipation channel 203 has realized the water conservancy diversion to the thermal current, in time discharge battery package 100, reduce the heat conduction between the electric core group 4, even one of them electric core group 4 takes place thermal runaway, the cell wall of mounting groove 202 also can completely cut off spun high heat, high energy electrolyte, furthest prevents thermal spread, slow down the risk of explosion on fire, the thermal runaway who leads to other electric core groups 4 when also preventing one of them electric core group 4 thermal runaway simultaneously, the loss is reduced.
According to the battery pack 100 provided by the embodiment of the invention, the plurality of electric core groups 4 are arranged in the plurality of mounting grooves 202, and the plurality of mounting grooves 202 are communicated with the heat dissipation channel 203, so that heat flow direction can be guided, heat spreading is prevented to the maximum extent, the risk of fire and explosion is reduced, meanwhile, the loss of thermal runaway is reduced, and the maintenance cost is reduced.
According to some embodiments of the invention, as shown in fig. 1 and 2, the housing 2 comprises: a lower housing 23, an upper housing 25, and at least one cross member 24. The upper case 25 cooperates with the lower case 23 to define an installation space 201, and the cross members 24 are provided in the installation space 201 to partition the installation space 201 into a plurality of installation grooves 202, for example, the installation grooves 202 are defined between adjacent two cross members 24 or between the cross members 24 and the side beams 22 of the lower case 23. Therefore, the cross beam 24 can separate two adjacent mounting grooves 202 to prevent heat spreading, and meanwhile, heat flow in the mounting grooves 202 is guided to the heat dissipation channel 203, so that the flow guiding effect is stable.
In addition, as shown in fig. 3 and 4, at least one end of the cross beam 24 has an avoiding notch 241, and a heat dissipation channel 203 is defined between the avoiding notch 241 and the upper housing 25, so that the flow area of the heat dissipation channel 203 is larger, the heat dissipation smoothness is ensured, and further, the hot gas is smoothly discharged according to a designed route.
Further, as shown in fig. 4, the peripheral edge of the upper case 25 and the edge beam 22 may be connected by a fastener, and a first heat insulating seal 61 is provided between the peripheral edge of the upper case 25 and the edge beam 22, as shown in fig. 5 to 7, the upper case 25 and the cross beam 24 are connected by a fastener, and a second heat insulating seal 62 is provided between the upper case 25 and the cross beam 24. First heat-proof seal piece 61 and second heat-proof seal piece 62 have leakproofness and heat-proof quality, also have higher temperature and bear the degree to guaranteed the wall effect of a plurality of mounting grooves 202, after electric core group 4 takes place thermal runaway, can effectively completely cut off the flow of hot-air between electric core group 4.
In a further embodiment of the present invention, as shown in fig. 5, 8 and 9, the upper surface of the upper housing 25 has a receiving groove 252, a fastener may connect the groove bottom wall of the receiving groove 252 and the cross member 24, and at least a portion of the nut of the fastener is located in the receiving groove 252. The periphery of the upper shell 25 is folded to form a recess 253, a fastener may connect the bottom wall of the recess 253 and the edge beam 22 of the lower shell 23, and at least a portion of the nut of the fastener is located within the recess 253. Therefore, the height of the fastener protruding from the upper surface of the upper case 25 can be reduced, or the fastener does not protrude from the upper surface of the upper case 25 at all, which is beneficial to reducing the height of the battery pack 100 and has a more compact structure.
Further, as shown with reference to fig. 8 and 9, the accommodation groove 252 communicates with the recessed portion 253, and the lowest point of the recessed portion 253 is lower than the lowest point of the accommodation groove 252 in the vertical direction. Therefore, the lowest point of the concave part 253 is the lowest point of the upper shell 25, and the liquid in the accommodating groove 252 can flow into the concave part 253 and be discharged from the concave part 253, so that the liquid accumulation of the upper shell 25 is prevented, and the liquid is also prevented from flowing into the mounting groove 202 from the mounting hole of the fastener to cause the short circuit of the electric core group 4.
Further, as shown in fig. 4, 10 and 11, the lower surface of the peripheral edge of the upper housing 25 is provided with a thickened portion 254 protruding downward, on one hand, the thickened portion 254 can increase the structural strength of the upper housing 25, and on the other hand, the thickened portion 254 can be in sealing engagement with the edge beam 22 of the lower housing 23 to increase the sealing area and improve the sealing effect.
In addition, as shown in fig. 4, in the embodiment provided with the first heat-insulating seal 61, the thickened portion 254 may surround the outer side of the first heat-insulating seal 61 to limit the first heat-insulating seal 61, so that the first heat-insulating seal 61 may be more stably interposed between the upper casing 25 and the side sill 22, and the first heat-insulating seal 61 is prevented from being displaced or shifted to affect the sealing effect.
In some embodiments of the present invention, as shown in fig. 5-7, the lower surface of the upper housing 25 may be provided with a mounting protrusion 251 protruding downward, the mounting protrusion 251 corresponds to the position of the receiving groove 252, and the mounting protrusion 251 is in sealing engagement with the cross beam 24, for example, in an embodiment provided with the second heat insulating seal 62, the second heat insulating seal 62 may be interposed between the mounting protrusion 251 and the cross beam 24, so as to ensure the sealing effect. And, the mounting protrusion 251 may be a recess formed on the lower surface of the upper case 25, the recess being spaced apart from the upper surface of the electric core pack 4, so that the hot air in the mounting groove 202 can more smoothly flow from the mounting groove 202 into the heat dissipation channel 203, thereby improving the heat dissipation effect.
In addition, as shown in fig. 6, the mounting convex portion 251 may have a routing gap 255, so that a connection line or a bus bar or the like between different electric core sets 4 can pass through the routing gap 255, so that the connection line structure does not affect the sealing between the mounting convex portion 251 and the cross beam 24.
According to some embodiments of the present invention, as shown in fig. 10 and 11, the upper case 25 may include: go up casing body 256 and thermal-insulated insulating layer 257, thermal-insulated insulating layer 257 locates one side of going towards electric core group 4 of last casing body 256, and thermal-insulated insulating layer 257 can be high temperature resistant, insulating to the improvement prevents that the heat from outwards conducting through last casing 25.
Optionally, the upper housing body 256 may be a high temperature resistant material, such as, but not limited to, steel. Alternatively, the thermal insulation layer 257 may be a spray coating material, such as fire retardant paint, ceramic particles, mica particles, or the like, or a composite material with the upper shell body 256, such as a ceramic layer, a mica layer, or the like.
According to some embodiments of the present invention, as shown in fig. 5 and 12, the electric core pack 4 may include: a stack end plate 43, a plurality of cells 41, and a clamping end plate 42. The stack end plate 43 may divide the mounting groove 202 into a first sub-mounting groove 202a and a second sub-mounting groove 202b, wherein a portion of the cells 41 are stacked and disposed on one side of the stack end plate 43, another portion of the cells 41 are stacked and disposed on the other side of the stack end plate 43, and the clamping end plates 42 are disposed at two ends of the stacked cells 41. As shown in fig. 2 and 3, the heat dissipation channels 203 are two and are a first heat dissipation channel 203a and a second heat dissipation channel 203b, respectively, the first sub mounting groove 202a communicates with the first heat dissipation channel 203a, and the second sub mounting groove 202b communicates with the second heat dissipation channel 203 b.
Therefore, the heat of the battery cell 41 in the first sub-mounting groove 202a and the heat of the battery cell 41 in the second sub-mounting groove 202b can flow to the two sides of the stack end plate 43 as shown by arrows in fig. 2, and then the first heat dissipation channel 203a and the second heat dissipation channel 203b are respectively discharged, so that the heat dissipation effect can be remarkably improved through multi-channel heat dissipation.
In addition, in the production process, a plurality of electric cores 41 can be piled up to both sides with piling up end plate 43 as the center, have solved electric core 41 in a large number, electric core group 4 length long term, the difficult control of power and balanced problem of piling up, both realized long electric core group 4's assembly, can guarantee again to control reasonable piling up the power interval, can also guarantee the equilibrium in clearance between a plurality of electric cores 41.
It should be noted that fig. 2 is a plan view of the battery pack 100, arrows indicate a flow path of hot air, and since the upper case 25 is shown in fig. 2, reference numerals of the mounting groove 202 and the heat dissipation channel 203 in fig. 2 indicate a space below the upper case 25
Alternatively, as shown in fig. 5 and 6, the receiving groove 252 and the mounting protrusion 251 of the upper case 25 may correspond to the stack end plate 43 and be connected to the stack end plate 43 by a fastener to increase a connection site and improve connection reliability. And a second heat insulating seal 62 may be provided between the mounting protrusion 251 and the stack end plate 43 to achieve the insulation sealing of the first and second sub-mounting grooves 202a and 202b, improving the heat spreading prevention effect.
Further, as shown in fig. 12, at least one of the positions between two adjacent electric cores 41, between the clamping end plate 42 and the electric core 41, and between the electric core 41 and the stacking end plate 43 may be provided with a first heat insulation layer 44, and a second heat insulation layer 45 is provided between the electric core 41 and the cross beam 24, so that the periphery of the electric core set 4 is isolated from heat, and the bottom surface of the electric core set 4 is heated and cooled, thereby reducing the influence of heat between the electric cores 41 and suppressing the heat spreading.
In some embodiments, as shown in fig. 13, at least one of the first and second insulation layers 44, 45 may include: an insulating body 46 and an insulating rim 47, the insulating rim 47 being disposed around the insulating body 46, and the insulating rim 47 being less compressible than the insulating body 46.
From this, thermal-insulated frame 47 can satisfy and pile up the absorption tolerance effect, and can restrict electric core 41 and too big at the charge-discharge in-process relative displacement, and thermal-insulated main part 46 then can effectively completely cut off heat-conduction, and the compressibility is great, provides the expansion space for electric core 41 middle part.
Alternatively, the insulating border 47 may be a less compressible material such as, but not limited to, a silicone rubber border; the insulation body 46 may be a thermally insulating material but more compressible, such as, but not limited to, aerogel blanket.
A vehicle according to another aspect of the embodiment of the present invention includes the battery pack 100 of the above embodiment.
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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A battery pack (100), comprising:
the heat dissipation device comprises a shell (2), wherein the shell (2) is internally provided with a plurality of mounting grooves (202) and heat dissipation channels (203), and the mounting grooves (202) are communicated with the heat dissipation channels (203);
the electric core groups (4) are installed in the installation grooves (202);
an explosion-proof valve (6), wherein the explosion-proof valve (6) is suitable for communicating the heat dissipation channel (203) with the outside;
the housing (2) comprises:
a lower case (23);
an upper housing (25), the upper housing (25) cooperating with the lower housing (23) to define a mounting space (201);
at least one cross beam (24), wherein the cross beam (24) is arranged in the installation space (201), the installation groove (202) is defined between two adjacent cross beams (24) or between the cross beam (24) and the edge beam (22) of the lower shell (23),
at least one end of the cross beam (24) is provided with an avoiding gap (241), and the heat dissipation channel (203) is defined between the avoiding gap (241) and the upper shell (25);
the periphery of the upper shell (25) is connected with the edge beam (22) through a fastener, a first heat-insulating sealing piece (61) is arranged between the periphery of the upper shell (25) and the edge beam (22), the upper shell (25) is connected with the cross beam (24) through a fastener, and a second heat-insulating sealing piece (62) is arranged between the upper shell (25) and the cross beam (24);
the upper surface of the upper shell (25) is provided with a containing groove (252), the fastening piece is connected with the bottom wall of the containing groove (252) and the cross beam (24), at least one part of a nut of the fastening piece is positioned in the containing groove (252), the periphery of the upper shell (25) is bent to form a concave part (253), the containing groove (252) is communicated with the concave part (253), and in the vertical direction, the lowest point of the concave part (253) is lower than the lowest point of the containing groove (252).
2. The battery pack (100) according to claim 1, wherein the lower surface of the peripheral edge of the upper case (25) is provided with a thickened portion (254) protruding downward, the thickened portion (254) is in sealing engagement with the edge beam (22) of the lower case (23), and the thickened portion (254) surrounds the outer side of the first heat-insulating seal member (61) to restrain the first heat-insulating seal member (61).
3. The battery pack (100) according to claim 1, wherein the lower surface of the upper case (25) is provided with a mounting protrusion (251) protruding downward, the mounting protrusion (251) corresponds to the position of the receiving groove (252), the mounting protrusion (251) is in sealing fit with the cross beam (24), and the mounting protrusion (251) has a trace notch (255).
4. The battery pack (100) according to claim 1, wherein the upper case (25) comprises:
an upper case body (256);
the heat insulation layer (257) is arranged on one side, facing the electric core group (4), of the upper shell body (256).
5. The battery pack (100) according to any one of claims 1-4, wherein the electric core group (4) comprises:
a stack end plate (43), the stack end plate (43) dividing the mounting groove (202) into a first sub-mounting groove (202a) and a second sub-mounting groove (202 b);
a plurality of cells (41), wherein a portion of the cells (41) are stacked on one side of the stack end plate (43) and another portion of the cells (41) are stacked on the other side of the stack end plate (43);
the clamping end plates (42) are arranged at two ends of the plurality of battery cores (41) which are arranged in a stacked mode,
the number of the heat dissipation channels (203) is two, the heat dissipation channels are respectively a first heat dissipation channel (203a) and a second heat dissipation channel (203b), the first sub mounting groove (202a) is communicated with the first heat dissipation channel (203a), and the second sub mounting groove (202b) is communicated with the second heat dissipation channel (203 b).
6. The battery pack (100) of claim 5, wherein a first thermal insulation layer (44) is arranged between two adjacent cells (41), between the clamping end plate (42) and the cells (41), and between the cells (41) and the stacking end plate (43), and a second thermal insulation layer (45) is arranged between the cells (41) and the cross beam (24),
at least one of the first and second insulation layers (44, 45) comprises:
an insulating body (46);
an insulating rim (47), the insulating rim (47) disposed around the insulating body (46), the insulating rim (47) having a degree of compressibility that is less than a degree of compressibility of the insulating body (46).
7. A vehicle, characterized in that it comprises a battery pack (100) according to any one of claims 1-6.
CN201910810366.8A 2019-08-29 2019-08-29 Battery pack and vehicle Active CN110444835B (en)

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