WO2020133760A1 - 电池箱 - Google Patents

电池箱 Download PDF

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Publication number
WO2020133760A1
WO2020133760A1 PCT/CN2019/079674 CN2019079674W WO2020133760A1 WO 2020133760 A1 WO2020133760 A1 WO 2020133760A1 CN 2019079674 W CN2019079674 W CN 2019079674W WO 2020133760 A1 WO2020133760 A1 WO 2020133760A1
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WO
WIPO (PCT)
Prior art keywords
plate
battery box
protrusion
bottom wall
wall
Prior art date
Application number
PCT/CN2019/079674
Other languages
English (en)
French (fr)
Inventor
谷燕龙
姜利文
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22204547.8A priority Critical patent/EP4148874A1/en
Priority to EP19901566.0A priority patent/EP3905366B1/en
Priority to US16/973,609 priority patent/US11114726B2/en
Publication of WO2020133760A1 publication Critical patent/WO2020133760A1/zh

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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
    • 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
    • H01M10/65—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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—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
    • H01M50/242—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
    • H01M50/249—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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • 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

Definitions

  • the invention relates to the field of batteries, in particular to a battery box.
  • an object of the present invention is to provide a battery case that can increase the overall strength of the lower case and avoid the risk of the lower case being easily damaged at locations where the structural strength is weak.
  • the present invention provides a battery case, which includes a lower case, and the lower case includes: a first plate and a second plate.
  • the first plate includes: a bottom wall; a peripheral wall connected to the periphery of the bottom wall and extending upward; and the bottom wall and the peripheral wall form an upwardly open receiving space; a second plate is fixed to the bottom wall from below and joined with the bottom wall to form a flow channel ,
  • the second plate is provided with: a second protrusion that protrudes from the side facing away from the first plate to the first plate and extends in the lateral direction; and an opening that penetrates the second protrusion in the height direction and extends in the lateral direction, the second plate
  • the two protrusions are hermetically connected to the bottom wall of the first plate;
  • the battery box further includes: a reinforcing beam, which is disposed below the second plate and extends in the lateral direction, the reinforcing beam is installed at a position corresponding to the opening, and is connected to the first plate
  • the bottom wall of the first plate is provided with: a first protrusion, which is recessed downward from the side of the bottom wall facing away from the second plate and protrudes toward the second plate and the first protrusion passes through Holes to fix the reinforcing beam to the first protrusion passing through the opening.
  • the reinforcing beam includes a first plate body
  • the first plate body includes: a bottom portion extending in the lateral direction; and two connecting portions, which are integrally connected to both longitudinal sides of the bottom portion, and each connecting portion corresponds to One side extends upward in the height direction and outwards in the longitudinal direction, and the two connecting portions abut and are fixed on the first protrusion of the first plate.
  • the second plate is provided with a first recess for forming the flow channel, the first recess is recessed downward from the side of the second plate facing the first plate and protrudes to the other side, the first recess protrudes Beyond the first protrusion; each connecting portion of the first plate body is provided with a sink at a position corresponding to the first recess of the second plate, and the sink is recessed downward from the side of the connecting portion facing the second plate.
  • the reinforcing beam further includes: two second plate bodies fixed to both ends of the first plate body in the lateral direction and located outside the first plate and the second plate in the lateral direction; each second plate body includes: The top wall is provided with through holes penetrating in the height direction; two side walls are connected to both sides of the top wall in the longitudinal direction and extend toward the first plate body; two connection walls are respectively connected to the corresponding side walls and are along the longitudinal direction Bending outward, each connecting wall is attached and fixed to the corresponding connecting portion of the first plate body.
  • the bottom of the first plate body and the two connecting portions form a first concave recessed downward; the top wall and the two side walls of the second plate body form a second concave concave upward, the first
  • the two grooves and the first groove together form a receiving cavity along the high direction.
  • each second plate body further includes: two lugs, each lug is connected to the laterally inner side of the corresponding side wall and is bent outward along a plane intersecting the lateral direction, and each lug abuts against the first The peripheral wall of a board.
  • each reinforcing beam is fixed to a corresponding first protrusion of the first plate passing through the opening.
  • the battery box further includes: a longitudinal beam extending in the longitudinal direction; a fastener passing through the connection portion of the reinforcing beam and the first protrusion of the first plate to be fixed on the longitudinal beam.
  • the battery box further includes: a plurality of battery packs, which are accommodated in the accommodation space.
  • the reinforcing beam is provided at the position of the opening of the lower case, which increases the strength of the second plate at the position of the opening, and avoids the position of the lower case where the structural strength is weak Risk of damage.
  • FIG. 1 is an assembly diagram of some constituent members of a battery box according to the present invention.
  • FIG. 2 is an assembly diagram of some of the constituent components in FIG. 1.
  • FIG. 3 is a bottom perspective view of FIG. 2.
  • FIG. 4 is an enlarged view of the circled part in FIG. 3.
  • FIG. 5 is an exploded view of FIG. 2.
  • FIG. 6 is a perspective view of a reinforcing beam.
  • the battery box 1 includes: a lower box body 1; a reinforcing beam 2 fixed below the lower box body 1.
  • the battery box 1 further includes: a cross beam 3 and a longitudinal beam 4, which are provided in the lower case 1, the reinforcing beam 2 can be fixed to the longitudinal beam 4 via a fastener 5; and a plurality of battery packs 6 are accommodated in the lower case 1 They are separated by the cross beam 3 and the longitudinal beam 4.
  • the lower case 1 includes: a first plate 11 and a second plate 12, and the second plate 12 is fixed below the first plate 11.
  • the first plate 11 includes: a bottom wall 111; a peripheral wall 112 connected to the peripheral edge of the bottom wall 111 and extending upward; and the bottom wall 111 and the peripheral wall 112 form an accommodation space 114 that opens upward.
  • the first plate 11 further includes a flange 113 connected to the end of the peripheral wall 112 and extending outward of the peripheral wall 112; wherein the bottom wall 111, the peripheral wall 112 and the flange 113 are integrally stamped and formed.
  • the bottom wall 111 of the first plate 11 may be provided with: a first protrusion 111P, which is recessed downward from the side of the bottom wall 111 facing away from the second plate 12 and protrudes toward the second plate 12.
  • the bottom wall 111 of the first plate 11 may not be provided with the first protrusion 111P, and can be designed according to specific circumstances.
  • the second plate 12 is fixed to the bottom wall 111 from below and joined to the bottom wall 111 to form a flow channel F.
  • the second plate 12 is provided with: a second protrusion 121 protruding from the side facing the reinforcing beam 2 toward the first plate 11 and extending in the lateral direction T; and an opening 122, a second protrusion penetrating the second plate 12 in the height direction H 121 extends in the lateral direction T, and the second protrusion 121 of the second plate 12 is hermetically connected to the bottom wall 111 of the first plate 11.
  • the number of first protrusions 111P corresponds to the number of openings 122.
  • the design of the opening 122 reduces the weight of the second plate 12 and reduces the overall weight of the lower case 1, thereby improving the energy density of the battery case.
  • the second plate 12 is provided with a main structure for forming the heat exchange flow path F, it is not suitable for fixing the reinforcing beam 2 to the second plate 12, and the opening 122 is designed to connect the reinforcing beam 2 to the first plate 11
  • the connection space is provided to facilitate the connection and installation of the reinforcement beam 2.
  • the first protrusion 111P passes through the opening 122 to fix the reinforcing beam 2 to the first protrusion 111P passing through the opening 122.
  • the second plate 12 is provided with a first recess 123 for forming the flow path F, and the first recess 123 is recessed downward from the side of the second plate 12 facing the first plate 11 and protrudes to the other side.
  • the first concave portion 123 protrudes beyond the first protrusion 111P.
  • the first concave portion 123 may be on the same horizontal plane as the first protrusion 111P.
  • the first protrusion 111P is inserted into the opening 122 to position the first plate 11 and the second plate 12 to ensure the accuracy of the position of the two during the joining process; in addition, the first protrusion 111P can also increase the The strength at the opening 122.
  • the peripheral edge of each first protrusion 111P is hermetically connected to the inner edge of the opening 122, preferably by welding.
  • the reinforcing beam 2 includes a first plate body 21 and two second plate bodies 22.
  • the two second plate bodies 22 are fixed to both ends of the first plate body 21 in the lateral direction T and are located outside the first plate 11 and the second plate 12 in the lateral direction T.
  • the first plate body 21 and the second plate body 22 form accommodating cavities 23 at both ends in the lateral direction.
  • the second plate body 22 is used as a lifting portion when lifting the battery box.
  • the first plate body 21 includes: a bottom portion 211 extending in the lateral direction T; and two connecting portions 212 integrally connected to both sides of the longitudinal direction L of the bottom portion 211, and each connecting portion 212 is along the height direction H from the side corresponding to the bottom portion 211 Upward and extending outward in the longitudinal direction L, the two connecting portions 212 abut and are fixed to the first protrusion 111P of the first plate 11. Note that when the first plate 11 is not provided with the first protrusion 111P, the connecting portion 212 may be directly fixed on the bottom wall 111 of the first plate 11.
  • the bottom 211 of the first plate 21 and the two connecting portions 212 form a first recess 213 recessed downward.
  • each connecting portion 212 of the first plate body 21 may be provided with a sink 212S at a position corresponding to the first concave portion 123 of the second plate 12
  • the sink 212S is recessed downward from the side of the connecting portion 212 facing the second plate 12 to avoid the first recess 123 in the height direction H.
  • the sink 212S on the first plate 21 of the reinforcing beam 2 can be adaptively cancelled. Therefore, whether the sink 212S is set or not
  • the distance by which the stage 212S is recessed downward can be adjusted adaptively according to the design of the first recess 123 for forming the heat exchange flow path F.
  • the reinforcing beam 2 is provided at the position of the opening 122 of the second plate 12, which can increase the strength at the opening 122 and prevent the damage of the lower case 1 at the opening 122 (the position with weak strength).
  • the first plate body 21 is formed by integral stamping.
  • Each second plate body 22 includes: a top wall 221 provided with a through hole 221h penetrating in the height direction H; two side walls 222 connected to both sides of the longitudinal wall L of the top wall 221 and extending toward the first plate body 21; The two connecting walls 223 are respectively connected to the corresponding side walls 222 and bent outward along the longitudinal direction L, and each connecting wall 223 is attached and fixed to the corresponding connecting portion 212 of the first plate body 21.
  • the top wall 221 and the two side walls 222 of the second plate body 22 form a second recess 224 that is recessed upward, and the second recess 224 and the first recess 213 together form a receiving cavity 23 along the height direction H.
  • Each second plate 22 further includes: two lugs 225, each lug 225 is connected to the inner side of the lateral T of the corresponding side wall 222 and is bent outward along a plane that intersects the lateral T, and each lug 225 abuts against The peripheral wall 112 of the first plate 11 is located below the flange 113 in the height direction H.
  • the second piece 22 is provided with a through hole 221h penetrating along the height direction H to provide a hoisting point for the battery box during the hoisting process, and the second groove 224 and the first groove 213 together constitute the accommodating cavity 23 along the height direction H , Can provide lifting space for lifting tools (such as lifting hooks).
  • Each lug 225 is fixed to the peripheral wall 112 of the first plate 11 by bonding or welding, which plays a role of positioning and prevents the battery box from shifting in the lateral direction T during lifting or transportation; in addition, during the lifting of the battery box, strengthening
  • the beam 2 bears the weight of the entire battery box, and the lugs 225 of the reinforcement beam 2 can transmit part of the force to the lower case, reduce the deformation of the reinforcement beam 2, and increase the strength of the reinforcement beam 2.
  • the second plate body 22 can be bent and formed by stamping.
  • the reinforcement beams 2 are provided in plural, and each reinforcement beam 2 is fixed to the corresponding first protrusion 111P of the first plate 11 passing through the opening 122.
  • the plurality of reinforcing beams 2 are respectively disposed at the corresponding openings 122, which can enhance the strength of the weak position of the lower case, thereby improving the overall strength of the battery box; at the same time, the plurality of reinforcing beams 2 can ensure the balance of the battery box during the lifting process.
  • the longitudinal beam 4 extends in the longitudinal direction L and is provided at the center of the bottom wall 111 in the lateral direction.
  • the beam 3 extends in the lateral direction T, and the lower end of the beam 3 in the height direction H is fixed to the bottom wall 111 of the first plate 11.
  • the cross beam 3 and the longitudinal beam 4 are arranged crosswise in the receiving space 114, and a variety of arrangements can be adopted.
  • both ends of the transverse T of the cross beam 3 are connected to the peripheral wall 112 of the first plate 11, and the transverse beam 3 is in the transverse T
  • the central position of is provided with a notch penetrating in the longitudinal direction L
  • the longitudinal beam 4 extends along the entire longitudinal direction of the receiving space 114 and passes through the recess of the transverse beam 3, so as to realize the cross arrangement of the transverse beam 3 and the longitudinal beam 4.
  • the longitudinal beam 4 as a whole extends along the entire longitudinal direction L of the receiving space 114
  • the longitudinal beam 4 has two transverse beams 3 on both sides of the transverse T, and the two transverse beams 3 are aligned with each other on both sides of the longitudinal beam 4 And lean against the longitudinal beam 4.
  • the beam 3 as a whole extends along the entire transverse direction T of the receiving space 114, and the longitudinal beam 4 is divided into a plurality of sections in the longitudinal direction L, and each section is sandwiched between two adjacent beams 3.
  • the setting of the longitudinal beam 4 provides a mounting point for the reinforcing beam 2, so that the reinforcing beam 2 can be fixed on the longitudinal beam 4, so that the lower box 1
  • the transverse T and longitudinal L strengths are increased, which in turn greatly increases the overall strength of the lower box 1.
  • the reinforcing beam 2 is connected to the longitudinal beam 4, the longitudinal beam 4 is connected to the transverse beam 3, and the reinforcing beam 2 can Distribute to the longitudinal beam 4 and then to the transverse beam 3, so that during the lifting process of the battery box, the force received by the reinforcement beam 2 is relieved, the reinforcement beam 2 is prevented from being damaged or deformed by a large force alone, and the reinforcement beam is improved 2 intensity.
  • the cross beams 3 and the longitudinal beams 4 are arranged in an intersecting manner to divide the storage space 114 into a plurality of sub-spaces, and the plurality of battery packs 6 are stored in the corresponding sub-spaces.
  • the fastener 5 passes through the connection portion 212 of the reinforcing beam 2 and the first protrusion 111P of the first plate 11 to be fixed to the longitudinal beam 4.
  • the fastener 5 is a screw.
  • the fastener 5 is used for fixed connection so that the reinforcing beam 2 is detachably fixed to the lower box 1, which facilitates maintenance and replacement of the reinforcing beam 2.

Abstract

本发明提供了一种电池箱，其包括下箱体，下箱体包括：第一板和第二板。第一板包括：底壁；周壁，连接于底壁的周缘并向上延伸；且底壁和周壁形成向上开口的收容空间；第二板，从下方固定于底壁并与底壁接合形成流道。第二板设有：第二突起，由背离第一板的一侧向第一板突出且沿横向延伸；以及开孔，沿高向贯通第二突起并沿横向延伸，第二板的第二突起与第一板的底壁密封连接；电池箱还包括：加强梁，设置于第二板的下方且沿横向延伸，加强梁安装于对应开孔的位置，且与第一板和/或第二板固定连接。加强梁的设置提高了下箱体的结构强度，避免了下箱体在结构强度薄弱位置容易损坏的风险。

Description

电池箱 技术领域
本发明涉及电池领域，尤其涉及一种电池箱。
背景技术
随着动力电池技术的发展，电动汽车对动力电池的要求越来越高，相应地，对动力电池换热系统的要求也越来越高，而下箱体与换热系统集成为一体的设计形式受到了广泛的关注，将下箱体与换热系统集成一体化的设计能够减轻电池箱的整体质量，降低成本，同时这种设计避免了漏液对电池箱内部造成的影响，此外，下箱体采用下板开孔，能够减轻下箱体的整体质量，但是，这种箱体整体强度弱，且在开孔位置结构强度更低，由此在电池箱装配或搬运过程中容易出现损坏。
发明内容
鉴于背景技术中存在的问题，本发明的目的在于提供一种电池箱，其能够提高下箱体的整体强度，避免下箱体在结构强度薄弱位置容易损坏的风险。
为了实现上述目的，本发明提供了一种电池箱，其包括下箱体，下箱体包括：第一板和第二板。第一板包括：底壁；周壁，连接于底壁的周缘并向上延伸；且底壁和周壁形成向上开口的收容空间；第二板，从下方固定于底壁并与底壁接合形成流道，第二板设有：第二突起，由背离第一板的一侧向第一板突出且沿横向延伸；以及开孔，沿高向贯通第二突起并沿横向延伸，第二板的第二突起与第一板的底壁密封连接；电池箱还包括：加强梁，设置于第二板的下方且沿横向延伸，加强梁安装于对应开孔的位置，且与第一板和/或第二板固定连接。
在一实施例中，第一板的底壁设有：第一突起，第一突起由底壁的背离第二板的一侧向下凹入并向第二板突出且第一突起穿过开孔以使加强梁固 定于穿过开孔的第一突起上。
在一实施例中，加强梁包括第一板体，第一板体包括：底部，沿横向延伸；以及两个连接部，一体地连接于底部的纵向的两侧，各连接部从底部对应的一侧沿高向向上并沿纵向向外延伸，两个连接部贴靠并固定于第一板的第一突起上。
在一实施例中，第二板设有用于形成流道的第一凹部，第一凹部由第二板的面向第一板的一侧向下凹入并向另一侧突出，第一凹部突出超过第一突起；第一板体的各连接部在与第二板的第一凹部对应的位置设有沉台，沉台由连接部的面向第二板的一侧向下凹入。
在一实施例中，加强梁还包括：两个第二板体，固定于第一板体的横向的两端且沿横向位于第一板和第二板的外侧；各第二板体包括：顶壁，设有沿高向贯通的通孔；两个侧壁，连接于顶壁的纵向的两侧并向第一板体延伸；两个连接壁，分别连接于对应的侧壁并沿纵向向外弯折，各连接壁贴合并固定于第一板体的对应的连接部。
在一实施例中，第一板体的底部与两个连接部形成向下凹入的第一凹槽；第二板体的顶壁和两个侧壁形成向上凹入第二凹槽，第二凹槽与第一凹槽共同构成沿高向的容置腔。
在一实施例中，各第二板体还包括：两个突耳，各突耳连接于对应侧壁的横向的内侧并沿与横向相交的平面向外弯折，各突耳贴靠于第一板的周壁。
在一实施例中，加强梁设置为多个，各加强梁固定于第一板的穿过开孔的对应的第一突起上。
在一实施例中，电池箱还包括：纵梁，沿纵向延伸；紧固件，穿过加强梁的连接部、第一板的第一突起而固定于纵梁上。
在一实施例中，电池箱还包括：多个电池组，收容于收容空间中。
本发明的有益效果如下：在根据本发明的电池箱中，加强梁设置在下箱体的开孔的位置，增加了第二板在开孔位置的强度，避免了下箱体在结构强度薄弱位置容易损坏的风险。
附图说明
图1是根据本发明的电池箱的部分组成构件的组装图。
图2是图1中的部分组成构件的组装图。
图3是图2的仰视立体图。
图4是图3中的圆圈部分的放大图。
图5是图2的分解图。
图6是加强梁的立体图。
其中，附图标记说明如下：
1下箱体                   213第一凹槽
11第一板                  22第二板体
111底壁                   221顶壁
111P第一突起              221h通孔
112周壁                   222侧壁
113凸缘                   223连接壁
114收容空间               224第二凹槽
12第二板                  225突耳
121第二突起               23容置腔
122开孔                   3横梁
123第一凹部               4纵梁
F换热流道                 5紧固件
2加强梁                   6电池组
21第一板体                L纵向
211底部                   H高向
212连接部                 T横向
212S沉台
具体实施方式
附图示出本发明的实施例，且将理解的是，所公开的实施例仅仅是本发明的示例，本发明可以以各种形式实施，因此，本文公开的具体细节不应被解释为限制，而是仅作为权利要求的基础且作为表示性的基础用于教导本领域普通技术人员以各种方式实施本发明。
此外，诸如纵向、高向和横向等用于说明本实施例中的电池箱的各构件的操作和构造的指示方向的表述不是绝对的而是相对的，且尽管当电池箱的各构件处于图中所示的位置时这些指示是恰当的，但是当这些位置改变时，这些方向应有不同的解释，以对应所述改变。
如图1至图4所示，根据本发明的电池箱1包括：下箱体1；加强梁2，固定于下箱体1的下方。电池箱1还包括：横梁3和纵梁4，设置于下箱体1中，加强梁2可经由紧固件5固定于纵梁4上；以及多个电池组6，收容于下箱体1并被横梁3和纵梁4间隔开。
如图5所示，下箱体1包括：第一板11和第二板12，第二板12固定于第一板11的下方。
第一板11包括：底壁111；周壁112，连接于底壁111的周缘并向上延伸；且底壁111和周壁112形成向上开口的收容空间114。第一板11还包括：凸缘113，连接于周壁112的端部并向周壁112的外部延伸；其中，底壁111、周壁112和凸缘113一体冲压成型。第一板11的底壁111可设有：第一突起111P，第一突起111P由底壁111的背离第二板12的一侧向下凹入并向第二板12突出。当然，第一板11的底壁111可不设有第一突起111P，可根据具体的情况进行设计。第二板12从下方固定于底壁111并与底壁111接合形成流道F。
第二板12设有：第二突起121，由朝向加强梁2的一侧向第一板11突出且沿横向T延伸；以及开孔122，沿高向H贯通第二板12的第二突起121并沿横向T延伸，第二板12的第二突起121与第一板11的底壁111密封连接。第二突起121为多个，对应地，开孔122也为多个。第一突起111P的数量与开孔122的数量相对应。开孔122的设计减轻了第二板12的重量，减少了下箱体1的整体重量，进而提高了电池箱的能量密度。此外，由于第二板12设有用于形成换热流道F的主要结构，不适于将加强梁2固定于第二板12上，而开孔122的设计为加强梁2与第一板11连接提供了连接的空间，便于加强梁2的连接安装。第一突起111P穿过开孔122以使加强梁2固定于穿过开孔122的第一突起111P上。第二板12设有用于形成流道F的第一凹部123，第一凹部123由第二板12的面向第一板11的一侧向下凹入并向另一侧突出。第一凹部123突出超过第一突起111P。第一凹部123也可 以与第一突起111P处于同一水平面上。第一突起111P插入开孔122中，能够对第一板11和第二板12进行定位，保证二者在接合过程中位置的准确性；此外，第一突起111P还能增加第二板12的开孔122处的强度。各第一突起111P的周缘与开孔122的内侧缘密封连接，优选地，通过焊接连接。
参照图6并结合图2，加强梁2包括第一板体21和两个第二板体22。两个第二板体22固定于第一板体21的横向T的两端且沿横向T位于第一板11和第二板12的外侧。第一板体21和第二板体22在横向的两端形成容置腔23。第二板体22用于对电池箱进行吊装时作为吊装部位来使用。
第一板体21包括：底部211，沿横向T延伸；以及两个连接部212，一体地连接于底部211的纵向L的两侧，各连接部212从底部211对应的一侧沿高向H向上并沿纵向L向外延伸，两个连接部212贴靠并固定于第一板11的第一突起111P上。注意的是，当第一板11未设有第一突起111P，连接部212可直接固定于第一板11的底壁111上。第一板体21的底部211与两个连接部212形成向下凹入的第一凹槽213。由于上文所述的当第一凹部123突出超过第一突起111P，第一板体21的各连接部212在与第二板12的第一凹部123对应的位置可对应地设有沉台212S，沉台212S由连接部212的面向第二板12的一侧向下凹入，以沿高向H避开第一凹部123。由此，当加强梁2固定于第一板11上的第一突起111P时，沉台212S能够避免加强梁2沿高向H挤压第一凹部123。而如果第一凹部123与第一突起111P设计为处于同一水平面上时，加强梁2的第一板体21上的沉台212S可适应性地取消，因此，沉台212S设定与否以及沉台212S向下凹入的距离可根据用于形成换热流道F的第一凹部123的设计做适应性调整。加强梁2设置在第二板12的开孔122位置，能够增加开孔122处的强度，防止下箱体1在开孔122(强度薄弱位置)处的损坏。第一板体21经由一体冲压形成。
各第二板体22包括：顶壁221，设有沿高向H贯通的通孔221h；两个侧壁222，连接于顶壁221的纵向L的两侧并向第一板体21延伸；两个连接壁223，分别连接于对应的侧壁222并沿纵向L向外弯折，各连接壁223贴合并固定于第一板体21的对应的连接部212。第二板体22的顶壁221和两个侧壁222形成向上凹入第二凹槽224，第二凹槽224与第一凹槽213共同构成沿高向H的容置腔23。各第二板体22还包括：两个突耳225，各突耳 225连接于对应侧壁222的横向T的内侧并沿与横向T相交的平面向外弯折，各突耳225贴靠于第一板11的周壁112且在高向H位于凸缘113的下侧。第二片体22设有沿高向H贯通的通孔221h，为电池箱在吊装过程提供吊装点，且第二凹槽224与第一凹槽213共同构成沿高向H的容置腔23，能够为吊装工具(例如吊装挂钩)提供吊装空间。各突耳225粘接或焊接固定于第一板11的周壁112，起到了定位的作用，防止了电池箱在吊装或运输过程中沿横向T移位；此外，在电池箱吊装过程中，加强梁2承受整个电池箱的重量，加强梁2的突耳225能够将部分力传递给下箱体，减少加强梁2的变形，提高加强梁2的强度。第二板体22可通过冲压弯折成型。
加强梁2设置为多个，各加强梁2固定于第一板11的穿过开孔122的对应的第一突起111P上。多个加强梁2分别设置在对应的开孔122处，能够增强下箱体薄弱位置的强度，进而提高电池箱的整体强度；同时多个加强梁2能够保证电池箱在吊装过程的平衡性。
如图2所示，纵梁4沿纵向L延伸并沿横向设置于底壁111的中央位置。横梁3沿横向T延伸，横梁3的高向H的下端固定于第一板11的底壁111上。横梁3和纵梁4交叉布置在收容空间114中，可以采用多种布置形式，其中一种情况是，横梁3的横向T的两端连接于第一板11的周壁112，横梁3在横向T的中央位置设有沿纵向L贯通的凹口，纵梁4沿收容空间114的整个纵向延伸并穿过横梁3的凹口，从而实现横梁3和纵梁4的交叉布置。另一种情况是，纵梁4作为沿收容空间114的整个纵向L延伸的一个整体，纵梁4横向T两侧的横梁3为两个，两个横梁3在纵梁4的两侧彼此对齐并抵靠于纵梁4上。或者又一情况是，横梁3作为沿收容空间114的整个横向T延伸的整体，纵梁4在纵向L上分为多段，且各段夹设于相邻两个横梁3之间。上述几种交叉布置情况均能够增加下箱体1的整体强度；此外，纵梁4的设置为加强梁2提供安装点，使得加强梁2能够固定于纵梁4上，从而，下箱体1的横向T和纵向L的强度均得到增加，进而很大程度上增加了下箱体1的整体强度，加强梁2与纵梁4连接，纵梁4与横梁3连接，加强梁2能够将力分散给纵梁4继而分散给横梁3，从而在电池箱的吊装过程中，缓解了加强梁2所承受的力，避免了加强梁2单独承受较大的力而损坏或变形，提高了加强梁2的强度。横梁3和纵梁4交叉布置将收容空间114分割成多 个子空间，多个电池组6收容于对应的子空间中。
紧固件5穿过加强梁2的连接部212、第一板11的第一突起111P而固定于纵梁4上。优选地，紧固件5为螺钉。采用紧固件5进行固定连接使得加强梁2可拆卸地固定于下箱体1，便于加强梁2的维修和更换。
上面详细的说明描述多个示范性实施例，但本文不意欲限制到明确公开的组合。因此，除非另有说明，本文所公开的各种特征可以组合在一起而形成出于简明目的而未示出的多个另外组合。

Claims (10)

  1. 一种电池箱，包括下箱体(1)，下箱体(1)包括：
    第一板(11)，包括：底壁(111)；周壁(112)，连接于底壁(111)的周缘并向上延伸；且底壁(111)和周壁(112)形成向上开口的收容空间(114)；
    第二板(12)，从下方固定于底壁(111)并与底壁(111)接合形成流道(F)，第二板(12)设有：第二突起(121)，由朝向加强梁(2)的一侧向第一板(11)突出且沿横向(T)延伸；以及开孔(122)，沿高向(H)贯通第二板(12)的第二突起(121)并沿横向(T)延伸，第二板(12)的第二突起(121)与第一板(11)的底壁(111)密封连接；
    电池箱还包括：加强梁(2)，设置于第二板(12)的下方且沿横向(T)延伸，加强梁(2)安装于对应开孔(122)的位置，且与第一板(11)和/或第二板(12)固定连接。
  2. 根据权利要求1所述的电池箱，其特征在于，
    第一板(11)的底壁(111)设有：第一突起(111P)，第一突起(111P)由底壁(111)的背离第二板(12)的一侧向下凹入并向第二板(12)突出且第一突起(111P)穿过开孔(122)以使加强梁(2)固定于穿过开孔(122)的第一突起(111P)上。
  3. 根据权利要求2所述的电池箱，其特征在于，加强梁(2)包括第一板体(21)，第一板体(21)包括：
    底部(211)，沿横向(T)延伸；以及
    两个连接部(212)，一体地连接于底部(211)的纵向(L)的两侧，各连接部(212)从底部(211)对应的一侧沿高向(H)向上并沿纵向(L)向外延伸，两个连接部(212)贴靠并固定于第一板(11)的第一突起(111P)上。
  4. 根据权利要求3所述的电池箱，其特征在于，
    第二板(12)设有用于形成流道(F)的第一凹部(123)，第一凹部(123)由第二板(12)的面向第一板(11)的一侧向下凹入并向另一侧突出，第一凹部(123)突出超过第一突起(111P)；
    第一板体(21)的各连接部(212)在与第二板(12)的第一凹部(123)对应的位置设有沉台(212S)，沉台(212S)由连接部(212)的面向第二板(12)的一侧向下凹入。
  5. 根据权利要求3所述的电池箱，其特征在于，
    加强梁(2)还包括：两个第二板体(22)，固定于第一板体(21)的横向(T)的两端且沿横向(T)位于第一板(11)和第二板(12)的外侧；
    各第二板体(22)包括：顶壁(221)，设有沿高向(H)贯通的通孔(221h)；两个侧壁(222)，连接于顶壁(221)的纵向(L)的两侧并向第一板体(21)延伸；两个连接壁(223)，分别连接于对应的侧壁(222)并沿纵向(L)向外弯折，各连接壁(223)贴合并固定于第一板体(21)的对应的连接部(212)。
  6. 根据权利要求5所述的电池箱，其特征在于，
    第一板体(21)的底部(211)与两个连接部(212)形成向下凹入的第一凹槽(213)；
    第二板体(22)的顶壁(221)和两个侧壁(222)形成向上凹入第二凹槽(224)，第二凹槽(224)与第一凹槽(213)共同构成沿高向(H)的容置腔(23)。
  7. 根据权利要求5所述的电池箱，其特征在于，
    各第二板体(22)还包括：两个突耳(225)，各突耳(225)连接于对应侧壁(222)的横向(T)的内侧并沿与横向(T)相交的平面向外弯折，各突耳(225)贴靠于第一板(11)的周壁(112)。
  8. 根据权利要求2所述的电池箱，其特征在于，
    加强梁(2)设置为多个，各加强梁(2)固定于第一板(11)的穿过开 孔(122)的对应的第一突起(111P)上。
  9. 根据权利要求3所述的电池箱，其特征在于，电池箱还包括：
    纵梁(4)，沿纵向(L)延伸；
    紧固件(5)，穿过加强梁(2)的连接部(212)、第一板(11)的第一突起(111P)而固定于纵梁(4)上。
  10. 根据权利要求1所述的电池箱，其特征在于，
    电池箱还包括：多个电池组(6)，收容于收容空间(114)中。
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