WO2017156771A1 - 下箱体及包含下箱体的电池箱 - Google Patents

下箱体及包含下箱体的电池箱 Download PDF

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Publication number
WO2017156771A1
WO2017156771A1 PCT/CN2016/076727 CN2016076727W WO2017156771A1 WO 2017156771 A1 WO2017156771 A1 WO 2017156771A1 CN 2016076727 W CN2016076727 W CN 2016076727W WO 2017156771 A1 WO2017156771 A1 WO 2017156771A1
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WIPO (PCT)
Prior art keywords
reinforcing
connecting member
chamber
lower case
cavity
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2016/076727
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English (en)
French (fr)
Inventor
马林
陈亮美
秦峰
姜亮
项延火
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Publication date
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Priority to PCT/CN2016/076727 priority Critical patent/WO2017156771A1/zh
Publication of WO2017156771A1 publication Critical patent/WO2017156771A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • 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 present application relates to the field of lithium ion battery production technology, and in particular, to a lower case and a battery case including the lower case.
  • a metal frame is mounted on the bottom of the lower case of the composite battery case. Although the metal frame is added, although the rigidity is increased, the weight of the battery case is also increased. For the whole vehicle, it will increase the weight of the whole vehicle, resulting in greater energy consumption.
  • the present application provides a lower case and a battery case including the lower case, which can ensure the strength and rigidity of the lower case of the battery case, and can reduce the weight of the battery case and increase the energy density.
  • the present application provides a lower case including a housing and a reinforcing connecting structure, the reinforcing connecting structure including at least one reinforcing connecting member,
  • the housing is a structure in which one end of the side wall and the bottom plate are open, and the inside of the housing is provided with a cavity, the housing is provided with a connecting piece perforation, the connecting piece is perforated and the The cavity is connected,
  • the reinforcing connecting member includes a connecting member, a reinforcing member and a filling structure, wherein the reinforcing member is disposed in the cavity, and the reinforcing member is provided with a connecting hole corresponding to the through hole of the connecting member, The connecting member is coupled to the connecting hole, and the filling structure fills a remaining space of the cavity.
  • the reinforcing connecting structure comprises a first reinforcing connecting member
  • the cavity comprises a first chamber
  • the connecting piece perforation comprises a first connecting piece perforation, and is in communication with the first chamber
  • the first reinforcing connecting member includes a first connecting member, a first reinforcing member, and a first filling structure
  • the first chamber is located in the side wall, the first connecting member is perforated on a bottom surface of the side wall, and is in communication with the first chamber, and the first reinforcing member is disposed on the first portion a first connecting hole corresponding to the first connecting piece through hole is disposed in the first reinforcing member, the first connecting member is connected to the first connecting hole, and the first filling structure is filled The remaining space of the first chamber.
  • the reinforcing connection structure further comprises a second reinforcing connecting member, the cavity comprises a second chamber, the connecting piece perforation comprises a second connecting piece perforation, and is in communication with the second chamber,
  • the second reinforcing connecting member includes a second connecting member, a second reinforcing member, and a second filling structure
  • the second chamber is located in the bottom plate, the second connecting member is perforated on a top surface of the bottom plate, and the second reinforcing member is disposed in the second chamber, on the second reinforcing member A second connection hole corresponding to the second connector through hole is provided, the second connection member is connected to the second connection hole, and the second filling structure fills a remaining space of the second chamber.
  • the reinforcing joint structure further includes a reinforcing rib disposed in the casing.
  • the reinforcing connection structure further comprises a third reinforcing connecting member, the cavity comprises a third chamber, the connecting piece perforation comprises a third connecting piece perforation, and is in communication with the third chamber,
  • the third reinforcing connecting member includes a third connecting member, a third reinforcing member, and a third filling structure
  • the third chamber is located in the side wall, the third connecting member is perforated on a top surface of the side wall, the third reinforcing member is disposed in the third chamber, the third reinforcement a third connecting hole corresponding to the third connecting piece perforation is disposed on the piece, the third connecting piece is connected to the third connecting hole, and the third filling structure fills a remaining space of the third chamber .
  • the reinforcing connecting structure includes the first reinforcing connecting member, the second reinforcing connecting member and the third reinforcing connecting member,
  • the first chamber, the second chamber, and the third chamber are integrally disposed.
  • the cavity fills the interior of the housing.
  • the connecting piece is connected to the connecting hole by means of gluing or screwing.
  • the connecting member is a self-tapping screw sleeve.
  • the present application further provides a battery case including an upper cover, a battery pack, and a lower case, the battery pack is disposed in the lower case, and the battery pack and the lower case
  • the upper cover covers the lower case, and the upper cover is fixed to the lower case.
  • the lower case provided by the present application and the battery case including the lower case can ensure the strength and rigidity of the lower case of the battery case on the one hand, and reduce the weight of the battery case and increase the energy density on the other hand.
  • FIG. 1 is a schematic overall structural view of a lower case provided by a first embodiment of the present application.
  • Figure 2 is an enlarged schematic view of a portion A of Figure 1;
  • FIG. 3 is a schematic structural view of a bottom portion of a lower case provided by the first embodiment of the present application.
  • FIG. 4 is a schematic exploded view showing the structure of a lower case provided by the first embodiment of the present application.
  • Figure 5 is a plan view of the lower case provided by the first embodiment of the present application.
  • Figure 6 is a cross-sectional view taken along line E-E of Figure 5;
  • Figure 7 is an enlarged schematic view of a portion C of Figure 6;
  • Figure 8 is a cross-sectional view taken along line F-F of Figure 5;
  • Figure 9 is an enlarged schematic view of a portion B of Figure 8.
  • FIG. 10 is a schematic overall structural view of a lower case provided by a second embodiment of the present application.
  • Figure 11 is a schematic exploded view showing the structure of the lower case provided by the second embodiment of the present application.
  • Figure 12 is a cross-sectional view taken along line B-B of Figure 10;
  • Figure 13 is an exploded perspective view of the components of Figure 12;
  • FIG. 14 is a schematic diagram of the overall structure of a battery case according to an embodiment of the present application.
  • the lower case 10 provided by the present application includes a housing 101 and a reinforced connection structure, and the housing 101 has a structure in which one end surrounded by the side wall 1011 and the bottom plate 1012 is open, and the shell is opened.
  • the interior of the body 101 is provided with a cavity, and a connector perforation is provided on the housing 101, the connector perforation being in communication with the cavity.
  • the reinforcing connecting structure comprises at least one reinforcing connecting member, the reinforcing connecting member comprises a connecting member, a reinforcing member and a filling structure, wherein the reinforcing member is disposed in the cavity for local reinforcement, and the reinforcing member is provided with a connecting hole corresponding to the through hole of the connecting member, and the connecting portion is connected
  • the piece is connected to the connecting hole, and the filling structure can fill the remaining space of the cavity to fix the position of the reinforcing member.
  • a bolt or the like can be passed through the outer member and the connector is perforated and threaded with the connector to connect the outer member to the lower case 10.
  • the reinforcing connection structure, the cavity, and the connector through-holes in this embodiment may be disposed at any position of the housing 101 for connection with different external components.
  • the reinforcing connection structure comprises at least one first reinforcing connecting member, the connecting piece perforation comprising at least one first connecting piece perforation 111a.
  • the first reinforcing connecting member includes a first reinforcing member 112a, a first filling structure 113a, and a first connecting member 114a.
  • the cavity formed by the side wall 1011 of the housing 101 includes a first chamber.
  • the first connecting member through hole 111a is disposed on the bottom surface of the side wall 1011 and communicates with the first chamber.
  • the first reinforcing member 112a is disposed at the first portion.
  • a first connecting hole (not labeled) corresponding to the first connecting piece through hole 111a is disposed in the first reinforcing member 112a, and the first connecting member 114a is connected to the first connecting hole, and the first filling structure 113a is filled with the first The remaining space of the chamber.
  • the first connecting member 114a is for screwing with an external connecting member (not shown) such as a screw or a bolt, and the external connecting member such as a screw or a bolt can sequentially pass through the outer member and the first connecting member through hole 111a and the first The connecting member 114a is screwed so that the outer member is coupled to the lower case 10.
  • the external part here is the body of the car.
  • the reinforcing connecting structure in this embodiment further includes at least one second reinforcing connecting member, and the connecting member through hole includes at least one second connecting member through hole 111b.
  • Second enhanced connection The member includes a second reinforcement member 112b, a second filling structure 113b, and a second connection member 114b.
  • the cavity formed by the bottom plate 1012 of the housing 101 includes a second chamber, and the second connector through hole 111b is disposed on the top surface of the bottom plate 1012 and communicates with the second chamber.
  • the second reinforcing member 112b is disposed in the second chamber, and the second reinforcing member 112b is provided with a second connecting hole (not labeled) corresponding to the second connecting member through hole 111b, and the second connecting member 114b and the second connecting hole Connecting, the second connecting member 114b here can also be screwed with a screw or a bolt, and a hole corresponding to the second connecting member 114b is also provided on the battery pack 30 (shown in FIG. 14), and the screw or the bolt is sequentially worn.
  • the hole in the battery pack 30 and the second connector through hole 111b on the casing 101 are screwed to the second connecting member 114b, thereby connecting the casing 101 to the internal battery pack 30.
  • the second filling structure 113b fills the remaining space of the second chamber.
  • a reinforcing rib 115 may be disposed in the housing 101.
  • the reinforcing rib 115 may be disposed in the second chamber. After the second filling structure 113b fills the remaining space of the second chamber, the reinforcing ribs 115 are distributed in the second chamber. The second filling structure 113b is inside.
  • the reinforcing ribs 115 may be plural, and the plurality of reinforcing ribs 115 are vertically and horizontally staggered.
  • the reinforcing rib 115 is preferably made of a composite material, or a low-density metal material, an alloy material or a wood material. The reinforcing rib 115 can improve the overall rigidity of the box body, meet the bearing requirements of the battery pack 30, reduce the local stress concentration of the composite material, and ensure the local structural strength.
  • the side wall 1011 of the housing 101 may further include a third chamber, and a third reinforcing connecting member is disposed in the third chamber, and the connecting member through hole further includes at least one third connecting member through hole 111c.
  • the third reinforcing connecting member includes a third reinforcing member 112c, a third filling structure 113c, and a third connecting member 114c.
  • the third connecting member through hole 111c is disposed on the top surface of the side wall 1011 and communicates with the third chamber. .
  • the third reinforcing member 112c is disposed in the third chamber, and the third reinforcing member 112c is provided with a third connecting hole (not labeled) corresponding to the third connecting member through hole 111c, and the third connecting member 114c and the third connecting hole connection.
  • the third connecting member 114c may also be screwed to the screw or the bolt
  • the upper cover 20 (shown in FIG. 14) is also provided with a hole corresponding to the third connecting member 114c, and the screw or the bolt is sequentially passed through.
  • the hole in the cover 20 and the third connector through hole 111c on the housing 101 are screwed to the third connecting member 114c, thereby connecting the housing 101 to the upper cover 20. .
  • the third filling structure 113c fills the remaining space of the third chamber.
  • the first reinforcement member 112a, the second reinforcement member 112b and the third reinforcement member 112c are generally wood materials, metal materials, alloy materials, composite materials or foam materials, where the metal materials are
  • the alloy material is preferably a low density metal or alloy such as aluminum, aluminum alloy or aluminum magnesium alloy.
  • the low-density metal and the alloy have high strength and are used in the lower casing 10 of the battery box, which can effectively improve the rigidity and strength of the joint, and ensure that the lower casing 10 does not break under the impact load, and the joint is at the joint.
  • the structure is intact and the connection site is not invalid.
  • the reinforcing member has high strength and high strength, which can improve the rigidity and strength of the joint with the connecting member, and ensure that the lower casing 10 does not break under the impact load and the vibration load, and the connecting rubber layer is intact, thereby Ensure that the connection site does not expire.
  • the connecting members may be connected to the respective connecting holes by means of an adhesive or a screw connection.
  • the connecting member is a common screw sleeve
  • the adhesive can be bonded and fixed with the connecting hole
  • the self-tapping screw sleeve can be directly screwed into the connecting hole for fastening connection.
  • the self-tapping screw connection can reduce the bonding curing time and shorten the processing cycle.
  • a hexagonal groove can be provided on the perforation of the connector, and the size and shape of the hexagonal groove are adapted to the end of the connector, that is, the connector passes through the connector through the perforation. After the inside of the reinforcing member, the outer edge of the end of the connecting member coincides with the inner edge of the hexagonal groove, thereby preventing the connecting member from rotating again.
  • the hexagonal groove does not necessarily have to have a hexagonal shape, such as a quadrangle or a triangle.
  • a plurality of first reinforcing members 112a are disposed on the side wall 1011 of the lower casing 10, and a plurality of first connecting members 114a corresponding to the plurality of first reinforcing members 112a are also plural, and a plurality of first connections are provided.
  • the piece 114a mates with its corresponding first reinforcement 112a such that the body is fixed to the lower case 10.
  • a through hole is directly provided in the casing 101.
  • a force is applied to the casing 101, which causes cracking of the casing 101, thereby damaging the lower casing 10.
  • the first reinforcement member 112a since the force is always applied to the first reinforcement member 112a when it is fixed, and the first reinforcement member 112a is made of a wood material, a metal material, an alloy material, a composite material or a foam material, it is capable of The housing 101 is prevented from being cracked, thereby ensuring that the lower case 10 is not damaged.
  • the second reinforcing member 112b is also disposed at a plurality of bottoms of the lower case 10, and the second connecting member 114b disposed at the bottom of the lower case 10 is also a plurality, and the plurality of second connecting members 114b and the corresponding second plus The strong member 112b is engaged so that the battery pack 30 is fixed to the case. Also, this can prevent the casing 101 from being cracked, and a plurality of second reinforcing members 112b can be provided, which can further serve the purpose of reinforcement and further increase the rigidity.
  • the number of the first connector through holes 111a is two, and is respectively disposed on the top surface of the side wall 1011 and the bottom surface of the side wall 1012, and the two first connector through holes 111a are oppositely disposed, and Both are in communication with the first chamber.
  • the number of the second connector through holes 111b is two, and is respectively disposed on the top surface and the bottom surface of the bottom plate 1012, and the two second connector through holes 111b are oppositely disposed, and both are opposite to the second cavity.
  • the rooms are connected.
  • FIGS. 10 to 13 show another embodiment of the present application, in which the reinforcing rib 115 is located between the second reinforcing member 112b and the bottom surface of the bottom plate 1012.
  • the present application further provides a battery case including an upper cover 20, a battery pack 30, and a lower case 10.
  • the battery pack 30 is disposed in the lower case 10, and the battery pack 30 and the lower case 10 are disposed.
  • the upper cover 20 covers the lower case 10, and the upper cover 20 is fixed to the lower case 10.
  • the molding of the structure of the lower case 10 is achieved by a molding process.
  • the manufacturing process of the lower case 10 of the present application is as follows:
  • Shell 101 A composite material may be used, and the ratio of fiber to resin, that is, the content of fiber, is designed according to the strength requirement of the composite material; according to the load region, the impact load region is locally strengthened, and sufficient fiber layer is laid in the region. , that is, enough composite felt, chopped strand mat, mesh cloth, unidirectional cloth, roving roving cloth, surface felt, preformed embryo, fabric, fiber premix, pre-invasive tape, which is long fiber, short fiber And their combinations. The thickness of the composite is then designed. The design has a design thickness of 0.5 mm to 10 mm.
  • the housing 101 has a high strength and can satisfy the rigidity of the lower case of the battery.
  • the reinforcing material of the casing 101 is in the form of composite felt, chopped strand mat, mesh cloth, unidirectional cloth, roving cloth, surface felt, preformed embryo, fabric, fiber premix, pre-invasive tape, which is long fiber. Short Fiber and its combination.
  • the reinforcing material of the casing 101 is made of glass fiber, aramid fiber, carbon fiber, boron fiber, natural fiber, ultra high molecular weight polyethylene fiber and a combination thereof.
  • the resin base of the casing 101 is made of epoxy resin, phenolic resin, unsaturated polyester, vinyl ester, bismaleimide, polyimide, cyanate resin, polyphenylene sulfide, polypropylene, polyether. Ketones, polyether ketones, and combinations thereof.
  • the composite material has a structural fiber content of 10% to 80%.
  • the thickness of the casing 101 is 0.5 mm to 10 mm.
  • the material of the filling structure may be a wood material, a metal material, an alloy material, a foam material or a composite material.
  • the foam material can be selected from polyvinyl chloride foam (PVC foam), polystyrene foam (PS foam), polyurethane foam (PU foam), polymethacrylamide foam (acrylic foam), styrene acrylonitrile copolymer foam (SAN). Foam), polymethacrylimide foam (PMI foam) and combinations thereof.
  • the filling structure is used for improving the overall rigidity and strength of the lower casing 10 due to its low density and a certain structural strength. Because of its low density, it can reduce the weight of the battery case and increase the energy density of the battery box.
  • the first chamber, the second chamber, and the third chamber may be integrally provided, and the occupied space may be enlarged as much as possible to fill the inside of the casing 101 with the cavity. This enables more filling structures to be filled to reduce the weight of the lower case 10.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请涉及锂离子电池生产技术领域，尤其涉及一种下箱体及包含下箱体的电池箱。下箱体包括壳体以及加强连接结构，加强连接结构包括加强连接构件，壳体为由侧壁以及侧壁围成，且壳体的内部设置有空腔，壳体上设置有连接件穿孔，连接件穿孔与空腔连通，加强连接构件包括连接件、加强件以及填充结构，加强件设置在空腔内，加强件上设置有连接孔，连接件与连接孔连接，填充结构填充空腔的剩余空间。电池箱包括上盖、电池组以及下箱体，电池组设置于下箱体内，且电池组与下箱体固定；所述上盖盖合所述下箱体，且所述上盖与所述下箱体固定。本申请一方面，能保证电池箱的下箱体的强度和刚度，另一方面又能减轻电池箱的重量，提高能量密度。

Description

下箱体及包含下箱体的电池箱 技术领域
本申请涉及锂离子电池生产技术领域，尤其涉及一种下箱体及包含下箱体的电池箱。
背景技术
现今，由于油价的上涨与资源越来越少，电动汽车已经成为汽车行业的一个重要发展方向。然而，在电动汽车上安装大量的动力电池，需要制作箱体来安装这些动力电池，而目前汽车行业使用的动力电池箱一般采用金属材料制造较多。金属电池箱具有结构复杂、工序多、一致性差、重量大等缺点。
因此，市面上又出现了复合材料电池箱，而完全的复合材料电池箱具有刚度低的缺点。
为了改善复合材料电池箱的刚度，便在复合材料电池箱的下箱体的底部安装金属架，由于增加了金属架，虽然会增大刚度，但是也会增加电池箱体的重量。对整车而言，便会增加整车的重量，从而带来更大的能耗。
发明内容
本申请提供了一种下箱体及包含下箱体的电池箱，既能保证电池箱的下箱体强度和刚度，又能减轻电池箱的重量，提高能量密度。
本申请提供了一种下箱体，包括壳体以及加强连接结构，所述加强连接结构包括至少一个加强连接构件，
所述壳体为由侧壁以及底板围成的一端敞口的结构，且所述壳体的内部设置有空腔，所述壳体上设置有连接件穿孔，所述连接件穿孔与所述空腔连通，
所述加强连接构件包括连接件、加强件以及填充结构，所述加强件设置在所述空腔内，所述加强件上设置有对应于所述连接件穿孔的连接孔， 所述连接件与所述连接孔连接，所述填充结构填充所述空腔的剩余空间。
优选地，所述加强连接结构包括第一加强连接构件，所述空腔包括第一腔室，所述连接件穿孔包括第一连接件穿孔，且与所述第一腔室连通，
所述第一加强连接构件包括第一连接件、第一加强件以及第一填充结构，
所述第一腔室位于所述侧壁内，所述第一连接件穿孔设置在所述侧壁的底面，且与所述第一腔室连通，所述第一加强件设置在所述第一腔室内，所述第一加强件上设置有对应于所述第一连接件穿孔的第一连接孔，所述第一连接件与所述第一连接孔连接，所述第一填充结构填充所述第一腔室的剩余空间。
优选地，所述加强连接结构还包括第二加强连接构件，所述空腔包括第二腔室，所述连接件穿孔包括第二连接件穿孔，且与所述第二腔室连通，
所述第二加强连接构件包括第二连接件、第二加强件以及第二填充结构，
所述第二腔室位于所述底板内，所述第二连接件穿孔设置在所述底板的顶面，所述第二加强件设置在所述第二腔室内，所述第二加强件上设置有对应于所述第二连接件穿孔的第二连接孔，所述第二连接件与所述第二连接孔连接，所述第二填充结构填充所述第二腔室的剩余空间，。
优选地，所述加强连接结构还包括加强筋，所述加强筋设置在所述壳体内。
优选地，所述加强连接结构还包括第三加强连接构件，所述空腔包括第三腔室，所述连接件穿孔包括第三连接件穿孔，且与所述第三腔室连通，
所述第三加强连接构件包括第三连接件、第三加强件以及第三填充结构，
所述第三腔室位于所述侧壁内，所述第三连接件穿孔设置在所述侧壁的顶面，所述第三加强件设置在所述第三腔室内，所述第三加强件上设置有对应于所述第三连接件穿孔的第三连接孔，所述第三连接件与所述第三连接孔连接，所述第三填充结构填充所述第三腔室的剩余空间。
优选地，所述加强连接结构同时包括所述第一加强连接构件、所述第二加强连接构件以及所述第三加强连接构件，
所述第一腔室、所述第二腔室与所述第三腔室一体设置。
优选地，所述空腔充满所述壳体的内部。
优选地，所述连接件通过胶粘或螺纹连接的方式与所述连接孔连接。
优选地，所述连接件为自攻螺套。
基于上述下箱体，本申请还提供了一种电池箱，包括上盖、电池组以及下箱体，所述电池组设置于所述下箱体内，且所述电池组与所述下箱体固定；所述上盖盖合所述下箱体，且所述上盖与所述下箱体固定。
本申请提供的技术方案可以达到以下有益效果：
本申请所提供的下箱体及包含下箱体的电池箱一方面，能保证电池箱的下箱体的强度和刚度，另一方面又能减轻电池箱的重量，提高能量密度。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为本申请第一实施例所提供的下箱体的整体结构示意图；
图2为图1中A部的放大示意图；
图3为本申请第一实施例所提供的下箱体底部的结构示意图；
图4为本申请第一实施例所提供的下箱体的结构爆炸示意图；
图5为本申请第一实施例所提供的下箱体的俯视图；
图6为沿图5中E-E方向的截面示意图；
图7为图6中C部的放大示意图；
图8为沿图5中F-F方向的截面示意图；
图9为图8中B部的放大示意图；
图10为本申请第二实施例所提供的下箱体的整体结构示意图；
图11为本申请第二实施例所提供的下箱体的结构爆炸示意图；
图12为沿图10中B-B方向的截面示意图；
图13为图12的零部件分解示意图；
图14为本申请实施例所提供的电池箱的整体结构示意图。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。文中所述“前”、“后”、“左”、“右”、“上”、“下”均以附图中的下箱体及包含下箱体的电池箱的放置状态为参照。
如图1至图4所示，本申请所提供的下箱体10，包括壳体101以及加强连接结构，壳体101为由侧壁1011以及底板1012围成的一端敞口的结构，且壳体101的内部设置有空腔，在壳体101上设置有连接件穿孔，该连接件穿孔与空腔连通。加强连接结构包括至少一个加强连接构件，加强连接构件包括连接件、加强件以及填充结构，加强件设置在空腔内，用于局部加强，加强件上设置有对应连接件穿孔的连接孔，连接件与连接孔连接，填充结构能够填充空腔的剩余空间，以固定加强件的位置。最后，诸如螺栓等能够穿过外部部件以及连接件穿孔并与连接件进行螺纹连接，以便将外部部件与下箱体10连接在一起。本实施例中的加强连接结构、空腔以及连接件穿孔可以设置在壳体101的任意位置，用于与不同的外部部件进行连接。
具体地，加强连接结构包括至少一个第一加强连接构件，连接件穿孔包括至少一个第一连接件穿孔111a。第一加强连接构件包括第一加强件112a、第一填充结构113a以及第一连接件114a。壳体101的侧壁1011形成的空腔内包含有第一腔室，第一连接件穿孔111a设置在侧壁1011的底面，且与第一腔室连通，第一加强件112a设置于第一腔室内，第一加强件112a上设置有对应第一连接件穿孔111a的第一连接孔(图中未标号)，第一连接件114a与第一连接孔连接，第一填充结构113a填充第一腔室的剩余空间。
第一连接件114a用于与螺钉、螺栓等外部连接件(图中未示出)进行螺纹连接，螺钉、螺栓等外部连接件能够依次穿过外部部件以及第一连接件穿孔111a并与第一连接件114a螺纹连接，从而使外部部件与下箱体10连接。这里的外部部件为车体。
如图4所示，本实施例中的加强连接结构还包括至少一个第二加强连接构件，连接件穿孔包括至少一个第二连接件穿孔111b。第二加强连接构 件包括第二加强件112b、第二填充结构113b以及第二连接件114b。壳体101的底板1012形成的空腔内包含第二腔室，第二连接件穿孔111b设置在底板1012的顶面，并与第二腔室连通。第二加强件112b设置于第二腔室内，第二加强件112b上设置有对应于第二连接件穿孔111b的第二连接孔(图中未标号)，第二连接件114b与第二连接孔连接，此处的第二连接件114b也可以与螺钉或螺栓螺纹连接，在电池组30(如图14所示)上也设有与第二连接件114b相对应的孔，螺钉或螺栓依次穿过电池组30上的孔以及壳体101上的第二连接件穿孔111b后与第二连接件114b螺纹连接，从而使壳体101与内部的电池组30连接。第二填充结构113b填充第二腔室的剩余空间。
另外，在壳体101内还可设置有加强筋115，如可将加强筋115设置在第二腔室内，在第二填充结构113b填充第二腔室的剩余空间后，加强筋115分布于第二填充结构113b内。在图4所示的实施例中，加强筋115可以为多个，多个加强筋115纵横垂直交错分布。其中，加强筋115最好采用复合材料，也可以采用低密度的金属材料、合金材料或木质材料。加强筋115可以提高箱体的整体刚度，满足电池组30的承载要求，减少复合材料局部应力集中，保证局部的结构强度。
在本实施例中，壳体101的侧壁1011内还可包含有第三腔室，在第三腔室内设置第三加强连接构件，连接件穿孔还包括至少一个第三连接件穿孔111c。其中，第三加强连接构件包括第三加强件112c、第三填充结构113c、以及第三连接件114c，第三连接件穿孔111c设置在侧壁1011的顶面上，并与第三腔室连通。第三加强件112c设置在第三腔室内，第三加强件112c上设置有对应于第三连接件穿孔111c的第三连接孔(图中未标号)，第三连接件114c与第三连接孔连接。此处的第三连接件114c也可以与螺钉或螺栓螺纹连接，在上盖20(如图14所示)上也设有与第三连接件114c相对应的孔，螺钉或螺栓依次穿过上盖20上的孔以及壳体101上的第三连接件穿孔111c后与第三连接件114c螺纹连接，从而使壳体101与上盖20连接。。第三填充结构113c填充第三腔室的剩余空间。其中，第一加强件112a、第二加强件112b和第三加强件112c一般为木质材料、金属材料、合金材料、复合材料或者泡沫材料，这里的金属材料以 及合金材料最好为铝、铝合金、铝镁合金等低密度金属或合金。密度低的金属以及合金具有较高的强度，用于电池箱的下箱体10中，能够有效提高连接处的刚度、强度，保证在冲击载荷情况下，下箱体10不破坏、连接件处结构完好，保证连接位点不失效。
通过这种方式代替了传统的金属架，既能保证电池箱的下箱体10的刚度，与传统的金属架相比，这样设置又能够减轻电池箱的重量。其中，加强件由于其密度低，具有较高的强度，可提高与连接件连接处的刚度、强度，保证在冲击载荷、振动载荷情况下，下箱体10不破坏，连接胶层完好，从而保证连接位点不失效。
在本实施例中，连接件可以采用粘接剂或螺纹连接的方式与各自的连接孔连接。例如，当连接件为普通螺套时，可以采用粘接剂与连接孔粘接固定，而采用自攻螺套时，则可以直接将自攻螺套旋进连接孔内进行紧固连接。采用自攻螺套连接的方式可以减少粘接固化时间，也可以缩短加工周期。
采用粘接剂进行连接时，可在连接件穿孔上设置六角形凹槽，六角形凹槽的大小和形状与连接件的端头相适应，也就是说，在连接件穿过连接件穿孔进入到加强件内部后，连接件的端头的外沿与六角形凹槽的内沿重合，从而防止连接件再转动。而采用自攻螺套时便无需再设置六角形凹槽。并且，六角形凹槽也不一定必须采用六角形，例如四角形、三角形均可。
如图5所示，第一加强件112a在下箱体10的侧壁1011上设置多个，与多个第一加强件112a相对应的第一连接件114a也为多个，多个第一连接件114a与其对应的第一加强件112a配合，从而使得车体固定在下箱体10上。
现有技术中是在壳体101上直接设置通孔，在与车体进行连接时，力会施加在壳体101上，就会造成壳体101的开裂，从而损坏下箱体10。而本申请中由于在固定时，力始终施加在第一加强件112a上，而第一加强件112a是由木质材料、金属材料、合金材料、复合材料或者泡沫材料制成，因此，也就能够防止壳体101开裂，从而保证下箱体10不被损坏。
第二加强件112b在下箱体10的底部也设置多个，下箱体10底部设置的第二连接件114b也为多个，多个第二连接件114b与其对应的第二加 强件112b配合，从而使得电池组30固定在箱体上。同样，这样也能防止壳体101开裂，并且设置多个第二加强件112b，能够进一步的起到加固的目的，并且进一步增加刚度。
如图6和图7所示，第一连接件穿孔111a的数量为两个，且分别设置在侧壁1011的顶面以及侧壁1012的底面，两个第一连接件穿孔111a相对设置，且均与第一腔室连通。
如图8和图9所示，第二连接件穿孔111b的数量为两个，且分别设置在底板1012的顶面和底面，两个第二连接件穿孔111b相对设置，且均与第二腔室连通。
图10至图13所示为本申请的另外一种实施方式中，加强筋115位于第二加强件112b与底板1012的底面之间。
如图14所示，本申请还提供了一种电池箱，包括上盖20、电池组30以及下箱体10，电池组30设置于下箱体10内，且电池组30与下箱体10固定；上盖20盖合下箱体10，且上盖20与下箱体10固定。
在本申请中，采用模压工艺实现下箱体10结构的成型。
本申请的下箱体10的制作流程为：
1)材料选择：根据物理化学性能要求，主要根据强度、刚度、及表面质量、腐蚀性能要求等，选择增强材料、树脂、夹芯。
2)外壳101：可以采用复合材料，根据复合材料的强度要求，设计纤维与树脂的比例，即纤维的含量；根据载荷区域，进行冲击载荷区局部加强，在该区域铺足够多的纤维铺层，即足够多的复合毡、短切毡、网格布、单向布、无捻粗纱布、表面毡、预成型胚、织物、纤维预混料、预侵胶布，其为长纤维、短纤维及其组合。后进行设计复合材料的厚度。该结构的设计厚度在0.5mm～10mm。
3)在模具内放置加强件、加强筋等结构，并由复合材料外壳包裹。
4)模压，传递树脂后固化，保证箱体结构尺寸、性能稳定。
5)箱体成型后打孔，并安装连接件。
本申请中，壳体101具有较高的强度，能够满足电池下箱体的刚度。壳体101的增强材料形式有复合毡、短切毡、网格布、单向布、无捻粗纱布、表面毡、预成型胚、织物、纤维预混料、预侵胶布，其为长纤维、短 纤维及其组合。
其中，壳体101的增强材料采用玻璃纤维、芳纶纤维、碳纤维、硼纤维、天然纤维、超高分子量聚乙烯纤维及其组合。
壳体101的树脂基采用环氧树脂、酚醛树脂、不饱和聚酯、乙烯基酯、双马来酰亚胺、聚酰亚胺、氰酸酯树脂、聚苯硫醚、聚丙烯、聚醚酮、聚醚酮及其组合。一般情况下该复合材料的结构纤维含量为10％～80％。壳体101的厚度为0.5mm～10mm。
填充结构的材料可以采用木质材料、金属材料、合金材料、泡沫材料或复合材料。其中，泡沫材料可以选择聚氯乙烯泡沫(PVC泡沫)、聚苯乙烯泡沫(PS泡沫)、聚氨酯泡沫(PU泡沫)、聚甲基丙烯酰胺泡沫(acrylic泡沫)、苯乙烯丙烯腈共聚泡沫(SAN泡沫)、聚甲基丙烯酰亚胺泡沫(PMI泡沫)及其组合。
填充结构由于密度低，且具有一定的结构强度，用于提高下箱体10的整体刚度、强度。因为密度低的特点，可以降低电池箱体的重量，提高电池箱的能量密度。
在本申请的其它实施方式中，可以将第一腔室、第二腔室与第三腔室一体设置，并可以尽量扩大所占空间，将空腔充满壳体101内部。这样能够填充更多的填充结构，以降低下箱体10的重量。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种下箱体，其特征在于，包括壳体以及加强连接结构，所述加强连接结构包括至少一个加强连接构件，
    所述壳体为由侧壁以及底板围成的一端敞口的结构，且所述壳体的内部设置有空腔，所述壳体上设置有连接件穿孔，所述连接件穿孔与所述空腔连通，
    所述加强连接构件包括连接件、加强件以及填充结构，所述加强件设置在所述空腔内，所述加强件上设置有对应于所述连接件穿孔的连接孔，所述连接件与所述连接孔连接，所述填充结构填充所述空腔的剩余空间。
  2. 根据权利要求1所述的下箱体，其特征在于，所述加强连接结构包括第一加强连接构件，所述空腔包括第一腔室，所述连接件穿孔包括第一连接件穿孔，且与所述第一腔室连通，
    所述第一加强连接构件包括第一连接件、第一加强件以及第一填充结构，
    所述第一腔室位于所述侧壁内，所述第一连接件穿孔设置在所述侧壁的底面，且与所述第一腔室连通，所述第一加强件设置在所述第一腔室内，所述第一加强件上设置有对应于所述第一连接件穿孔的第一连接孔，所述第一连接件与所述第一连接孔连接，所述第一填充结构填充所述第一腔室的剩余空间。
  3. 根据权利要求2所述的下箱体，其特征在于，所述加强连接结构还包括第二加强连接构件，所述空腔包括第二腔室，所述连接件穿孔包括第二连接件穿孔，且与所述第二腔室连通，
    所述第二加强连接构件包括第二连接件、第二加强件以及第二填充结构，
    所述第二腔室位于所述底板内，所述第二连接件穿孔设置在所述底板的顶面，所述第二加强件设置在所述第二腔室内，所述第二加强件上设置有对应于所述第二连接件穿孔的第二连接孔，所述第二连接件与所述第二连接孔连接，所述第二填充结构填充所述第二腔室的剩余空间，。
  4. 根据权利要求3所述的下箱体，其特征在于，所述加强连接结构 还包括加强筋，所述加强筋设置在所述壳体内。
  5. 根据权利要求2或3所述的下箱体，其特征在于，所述加强连接结构还包括第三加强连接构件，所述空腔包括第三腔室，所述连接件穿孔包括第三连接件穿孔，且与所述第三腔室连通，
    所述第三加强连接构件包括第三连接件、第三加强件以及第三填充结构，
    所述第三腔室位于所述侧壁内，所述第三连接件穿孔设置在所述侧壁的顶面，所述第三加强件设置在所述第三腔室内，所述第三加强件上设置有对应于所述第三连接件穿孔的第三连接孔，所述第三连接件与所述第三连接孔连接，所述第三填充结构填充所述第三腔室的剩余空间。
  6. 根据权利要求5所述的下箱体，其特征在于，所述加强连接结构同时包括所述第一加强连接构件、所述第二加强连接构件以及所述第三加强连接构件，
    所述第一腔室、所述第二腔室与所述第三腔室一体设置。
  7. 根据权利要求1所述的下箱体，其特征在于，所述空腔充满所述壳体的内部。
  8. 根据权利要求1所述的下箱体，其特征在于，所述连接件通过胶粘或螺纹连接的方式与所述连接孔连接。
  9. 根据权利要求8所述的下箱体，其特征在于，所述连接件为自攻螺套。
  10. 一种电池箱，其特征在于，包括上盖、电池组以及权利要求1至9中任一项所述的下箱体，
    所述电池组设置于所述下箱体内，且所述电池组与所述下箱体固定；
    所述上盖盖合所述下箱体，且所述上盖与所述下箱体固定。
PCT/CN2016/076727 2016-03-18 2016-03-18 下箱体及包含下箱体的电池箱 Ceased WO2017156771A1 (zh)

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CN110492035A (zh) * 2019-08-21 2019-11-22 中材科技（苏州）有限公司 一种动力电池的下箱体及其制法
CN111276655A (zh) * 2020-02-18 2020-06-12 广汽蔚来新能源汽车科技有限公司 电池盒及其壳体结构
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WO2023160034A1 (zh) * 2022-02-23 2023-08-31 宁德时代新能源科技股份有限公司 电池箱体上盖、电池箱体、电池及用电设备

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CN110492035A (zh) * 2019-08-21 2019-11-22 中材科技（苏州）有限公司 一种动力电池的下箱体及其制法
CN111276655A (zh) * 2020-02-18 2020-06-12 广汽蔚来新能源汽车科技有限公司 电池盒及其壳体结构
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