WO2023020552A1 - 下壳体、电池包及车辆 - Google Patents

下壳体、电池包及车辆 Download PDF

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Publication number
WO2023020552A1
WO2023020552A1 PCT/CN2022/113107 CN2022113107W WO2023020552A1 WO 2023020552 A1 WO2023020552 A1 WO 2023020552A1 CN 2022113107 W CN2022113107 W CN 2022113107W WO 2023020552 A1 WO2023020552 A1 WO 2023020552A1
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WO
WIPO (PCT)
Prior art keywords
sealing
battery pack
side beams
cutout
sealing material
Prior art date
Application number
PCT/CN2022/113107
Other languages
English (en)
French (fr)
Inventor
王博文
Original Assignee
北京车和家信息技术有限公司
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Filing date
Publication date
Application filed by 北京车和家信息技术有限公司 filed Critical 北京车和家信息技术有限公司
Priority to EP22857863.9A priority Critical patent/EP4391169A1/en
Publication of WO2023020552A1 publication Critical patent/WO2023020552A1/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
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H01M50/26—Assemblies sealed to each other in a non-detachable manner
    • 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 present disclosure relates to the technical field of vehicle manufacturing, and in particular, to a lower casing, a battery pack and a vehicle.
  • the power battery pack is an important part of the electric vehicle.
  • the quality of the battery not only determines the mileage of the electric vehicle, but also affects the quality of the whole vehicle.
  • the battery pack generally includes a lower casing. During the assembly process of the battery pack, if the sealing of the lower casing is difficult to ensure, there will be a risk of the sealing failure of the entire battery pack, which will reduce the service life of the battery pack and affect the driving of electric vehicles. mileage.
  • the present disclosure provides a lower case, a battery pack including the lower case, and a vehicle equipped with the battery pack.
  • the embodiments of the present disclosure provide a lower casing
  • the lower casing includes a plurality of side beams connected to each other, and cutouts are formed at the corners of the side beams, so that two adjacent side beams After the side beams are butted, the two adjacent cutouts form a receiving groove for filling the sealing material.
  • the sealing material in the receiving groove is arranged flush with the horizontal edge of the side rail.
  • the cutout is configured as a chamfer that slopes from a horizontal edge of the edge rail toward a vertical edge of the edge rail.
  • the inclination angle ⁇ of the notch surface of the notch is 30°-60°
  • the ratio of the projected length of the vertical direction of the notch to the height of the edge beam is 1:6-1:13
  • the horizontal projection length of the cutout is equal to the vertical projection length of the cutout.
  • the side beam includes an upper corner and a lower corner, and the cutout is provided at both the upper corner and the lower corner.
  • one of the adjacent two side beams is configured as a cavity structure with a side wall, and the other is configured as a cavity structure with a bottom side wall.
  • a sealing material is filled between the contact surfaces of two adjacent side beams to form a sealing layer, and the sealing layer completely covers the contact surfaces, and the thickness of the sealing layer is configured as This enables two adjacent side beams to be respectively in interference fit with the sealing layer.
  • an embodiment of the present disclosure provides a battery pack, including an electric cell, and an upper case, a lower case, and a bottom guard plate sequentially connected from top to bottom, and the electric cell is housed in the lower case Inside the body, the lower casing is the lower casing according to any one of the above embodiments.
  • a first sealing strip is provided between the bottom surface of the upper casing and the top surface of the lower casing, and a first sealing strip is provided between the bottom surface of the lower casing and the top surface of the bottom guard plate. There is a second seal.
  • the accommodating groove is formed on both the top surface and the bottom surface of the lower casing, and the first sealing strip and the second sealing strip are respectively pasted on the seals accommodated in the accommodating groove. material.
  • the first sealing strip and the second sealing strip are each made of flexible material.
  • an embodiment of the present disclosure provides a vehicle, including a battery pack, and the battery pack is the battery pack described in any one of the above embodiments.
  • two adjacent cutouts can be formed as receiving grooves to provide a filling space for the sealing material filled between the two adjacent side beams, thereby Guarantee the filling capacity of the sealing material.
  • the height difference between two adjacent side beams due to installation or manufacturing can be compensated by filling the sealing material into the accommodation groove, so as to ensure the sealing effect between the two side beams and the sealing surface of the side beams. Flatness, so as to further ensure that the contact surface of the edge beam and other components can be well fitted.
  • FIG. 1 is a schematic structural view of a battery pack provided in an exemplary embodiment of the present disclosure
  • Fig. 2 is a partial enlarged view of part A in Fig. 1;
  • FIG. 3 is a rear view of a battery pack provided by an exemplary embodiment of the present disclosure.
  • Fig. 4 is a partially enlarged view of part B in Fig. 3;
  • Fig. 5 is a schematic diagram of an unfilled sealant between two adjacent beams provided by an exemplary embodiment of the present disclosure.
  • orientation words used such as “upper”, “lower”, “top”, and “bottom” refer to the normal installation of the lower housing and the battery pack provided according to the embodiments of the present disclosure.
  • the direction of the drawing shown in Figure 3 please refer to the direction of the drawing shown in Figure 3 for details.
  • “Inner” and “outer” refer to the inside and outside of the outline of the corresponding part.
  • Terms such as “first” and “second” etc. used in the present disclosure are for distinguishing one element from another, and do not have sequence or importance.
  • the same reference numerals in different drawings represent the same or similar elements.
  • the embodiment of the present disclosure provides a lower casing, which may include a plurality of side beams 11 connected to each other to form a frame structure, which can ensure that the lower casing has sufficient safety and stability, the lower case can be used to accommodate the battery module, or, in CTP (Cell to Pack, no module) technology, the lower case can be used to accommodate the batteries mentioned below, such as blades Batteries, etc., can ensure the reliability of the battery cell installation.
  • Cutouts 111 may be formed at the corners of the side beams 11, so that after two adjacent side beams 11 are butted together, the adjacent two cutouts 111 form the accommodation groove 2, which can be formed as an accommodation space for filling the sealing material 3 for use For filling sealing material 3.
  • the corners of the side beams 11 refer to the corners where two adjacent side beams 11 are in contact.
  • the corners are the four corners of the side beams 11 .
  • the accommodating groove 2 formed on the body of the side beam 11 can effectively ensure the stability of filling of the sealing material 3 .
  • the sealing material 3 may be a sealant, which can deform with the shape of the sealing surface of the receiving groove 2 and has a certain adhesiveness, or it may also be other materials with a sealing effect.
  • the filling of the sealing material 3 can effectively improve the flatness of the sealing surface of the side beams 11, avoid the problem of airtightness failure caused by too large a height deviation between two adjacent side beams 11, and ensure that the batteries contained in the lower case The stability and safety of the battery prevent external gas or liquid from entering the lower case, which will affect the service life of the battery.
  • the staff can smooth the sealing material 3 to further reduce the height difference between two adjacent side beams 11, so as to ensure the smoothness of the sealing surface.
  • two adjacent cutouts 111 can be formed as receiving grooves 2, so as to fill the sealing material between the two adjacent side beams 11. 3 provides a filling space, thereby ensuring the filling capacity of the sealing material 3.
  • the height difference between two adjacent side beams 11 due to installation or manufacturing can be compensated by filling the sealing material 3 into the receiving groove 2, so as to ensure the sealing effect and edge sealing effect between the two side beams 11.
  • the flatness of the sealing surface of the beam 11 further ensures that the contact surfaces of the side beam 11 and other components can fit well.
  • the sealing material 3 in the receiving groove 2 can be arranged flush with the horizontal side of the side beam 11 .
  • the staff can level the sealing material 3, so that the sealing material 3, the upper casing and the bottom guard plate 5 can be in plane contact to ensure the sealing.
  • one end of the sealing material 3 can also be flush with the higher side beam, and the other end can be flush with the lower side beam 11, so that the sealing material 3 can be used as a transition structure between the two, thereby further reducing the height difference too much. Large caused airtight failure problem.
  • the smoothing effect of the sealing material 3 can be determined according to the specific height difference positions of the side beams 11 .
  • the cutout 111 is configured as a chamfered structure inclined from the horizontal side of the side beam 11 toward the vertical side of the side beam 111 , which can facilitate the filling of the sealing material 3 in the receiving groove 2 at most.
  • the accommodating groove 2 can be configured as a V-shaped structure, and the side wall of the V-shaped structure can guide the sealing material so that it can be filled with the sealing material 3 , and the forming is simple and convenient, and can ensure the overall strength of the side beam 11 , and effectively improve the assembly efficiency between the side beams 11 .
  • the accommodating groove 2 can also be configured as a structure with an arc-shaped bottom.
  • the height ratio can be 1:6 ⁇ 1:13, the horizontal projection length of the cutout 111 can be equal to the vertical projection length of the cutout 111, when the height of the side beam 11 is 40cm, the vertical projection length of the cutout 111 can be 3cm-7cm, for example 5cm, correspondingly, the projection length of the incision 111 in the horizontal direction may be 5cm.
  • This ratio range can be adapted to side beams 11 of different heights, so that the height of the receiving groove 2 can meet the height difference requirements in various situations.
  • the angle of inclination refers to the angle of the notch 111 relative to the horizontal plane (that is, the plane perpendicular to the drawing plane of Fig. 5), and the projected length in the horizontal direction refers to the orthographic projection of the notch 111 to the upper and lower directions on the drawing
  • the length of the projection in the vertical direction refers to the length of the orthographic projection of the cutout 111 to the left and right directions of the drawing.
  • the notch 111 in this size range is easy to manufacture, and will not damage the overall structure of the side beam 11, and can ensure the stability and sufficient filling amount of the sealing material 3, thereby ensuring the flatness of the sealing surface of the side beam 11 and the flatness of the side beam 11. Sealing effect.
  • the side beam 11 includes an upper corner and a lower corner, and both the upper corner and the lower corner may be provided with a notch 111 to further increase the filling amount of the sealing material 3 and ensure that the upper surfaces of the adjacent two side beams 11 and the flatness of the lower surface to ensure the sealing effect between the side beams 11.
  • cutouts 111 are provided at the upper and lower corners, which can ensure that the side beam 11 is closely connected with the parts on the upper and lower sides, thereby ensuring that the battery cell can sealed in the battery pack.
  • one of adjacent two side beams 11 is configured as a cavity structure with a side wall 112, and the other is configured as a cavity structure with a bottom side wall 113, and the side wall 112 is formed with a first cavity structure.
  • An installation hole, a second installation hole corresponding to the first installation hole is formed on the bottom wall 113 , and two adjacent side beams 11 are connected by fasteners passing through the first installation hole and the second installation hole.
  • the bottom wall 113 can be the wall on the side of the corresponding side beam 11 close to the battery core, and the side wall 112 can be the wall on the side of the corresponding side beam 11 perpendicular to the battery core.
  • the cavity can ensure fastening The stability of the installation position of the fasteners, so that the fasteners can ensure the connection effect between two adjacent side beams 11; on the other hand, the cavity can effectively isolate the fasteners from other components arranged around the lower shell, Such as wire harnesses to avoid interference between fasteners and wire harnesses.
  • the fasteners used to connect two adjacent side beams 11 can be bolts, and the first installation hole and the second installation hole can be formed as threaded holes that can match the bolts, so that two adjacent side beams 11
  • the side beams 11 can be detachably connected to facilitate the inspection and maintenance of the lower casing by workers, and at the same time, the connection strength between two adjacent side beams 11 can be effectively improved.
  • the side beams 11 When two side beams 11 are connected by bolts, it is easy to cause the upper and lower edges of the two side beams 11 to be misaligned during the installation process of the bolts. Therefore, the side beams 11 provided by the present disclosure can well solve this technical problem.
  • the side beam 11 and the joint bolt connection method make the sealing effect of the battery pack better and make the installation of the lower case more convenient.
  • the side beams 11 may also be connected by bonding.
  • the sealing material 3 is filled between the contact surfaces of two adjacent side beams 11 to form a sealing layer, and the sealing material 3 is filled to form a sealing layer between the contact surfaces of two adjacent side beams 11.
  • the material 3 can also be a sealant, so that the sealing material 3 can not only fill the gap between the two side beams 11 to ensure the sealing effect between the two side beams 11, but at the same time, the sealing material 3 can also improve the sealing effect of the two side beams 11.
  • the connection strength between the beams 11 improves the overall effect between the multiple side beams 11, ensures the stability of the connection between the side beams 11, and avoids damage to the battery cells contained in the lower casing, thereby improving the service life of the battery cells.
  • the sealing material 3 between the contact surfaces of the two side beams 11 can be pre-coated on the contact surfaces, and it can be ensured that when the two side beams 11 are fixed by bolts, the sealing material 3 can overflow from the surroundings to ensure the sealing Effect.
  • the sealing material 3 between the contact surfaces of the two side beams 11 may come from the sealing material 3 in the accommodation groove 2, specifically, the sealing material 3 may be firstly filled into the accommodation groove 2, and then by extrusion, The sealing material 3 is made to flow in from the gap between the two side beams 11 , so as to more comprehensively seal the gap between the two side beams 11 .
  • the thickness of the sealing layer can be configured so that the two adjacent side beams 11 can respectively have an interference fit with the sealing layer, so that the sealing layer can partially wrap the end faces of the two adjacent side beams 11 that are in contact with each other, greatly strengthening the sealing material 3
  • the sealing effect between two adjacent side beams 11 ensures the reliability of the connection between two adjacent side beams 11 .
  • the staff can smooth the sealing material 3 here, on the one hand, it can improve the flatness of the outer contour surface of the side beam 11, and at the same time, it can effectively ensure the sealing effect between the sealing material 3 and the side beam 11 , to avoid excessive filling of the sealant 3 , resulting in waste of resources or overflow from the gap between two adjacent side beams 11 .
  • sealing structures such as sealing strips may be pasted on the outer surfaces of the joints between two adjacent side beams 11 to further ensure that the sealing material 3 will not overflow in a direction perpendicular to the paper surface of FIG. 5 .
  • the battery pack provided by the embodiment of the present disclosure may include a cell or a battery module composed of multiple cells, and an upper case 4, a lower case and a bottom guard plate 5 sequentially connected from top to bottom, the lower case According to the above-mentioned lower case, the cells or battery modules can be accommodated in the closed space surrounded by the upper case 4 , the lower case and the bottom guard plate 5 to obtain sufficient protection.
  • the battery pack has all the beneficial effects of the above-mentioned lower casing, which will not be repeated here.
  • a first sealing strip 61 may be provided between the bottom surface of the upper casing 4 and the top surface of the lower casing (that is, the top surface of the side beam 11), so as to improve the upper casing 4 and the lower casing.
  • a second sealing strip 62 can be arranged between the bottom surface of the lower shell (that is, the bottom surface of the side beam 11) and the top surface of the bottom guard plate 5, so as to improve the sealing effect between the lower shell and the bottom guard plate 5.
  • Excellent sealing effect so as to ensure the sealing performance of the battery pack, thereby improving the service life of the battery pack.
  • accommodating grooves 2 can be formed on the top and bottom surfaces of the lower casing, so that the bottom and top surfaces of the lower casing can be filled with sealing material 3 to further improve the edge
  • the flatness of the top surface and the bottom surface of the beam 11 improves the sealing effect between the side beams 11 .
  • the first sealing strip 61 and the second sealing strip 62 can be pasted on the sealing material 3 in the corresponding accommodation groove 2 respectively, and after the sealing material is filled in the accommodation groove 2 and smoothed, the sealing strip can be glued on on the smoothed sealing material.
  • the connection effect between two adjacent side beams 11 can be further ensured, and the sealing performance of the connection position of adjacent two side beams 11 can be further improved.
  • the first sealing strip 61 and the second sealing strip 62 can be made of flexible materials respectively. For example, rubber material, etc.
  • the sealing effect between the upper casing 4 and the lower casing can be improved through the first sealing strip 61
  • the sealing effect between the lower casing and the bottom guard plate 5 can be improved through the second sealing strip 62, so as to ensure that the battery pack The airtightness; also when the battery pack is squeezed by external force, both the first sealing strip 61 and the second sealing strip 62 can play a certain buffering role.
  • the first sealing strip 61 can also reduce the abrasion between the upper casing 4 and the lower casing
  • the second sealing strip 62 can also reduce the abrasion between the lower casing and the bottom guard plate 5, so that the lower casing can be improved. , the safety between the upper casing 4 and the bottom guard plate 5, thereby improving the service life of the battery pack.
  • Embodiments of yet another aspect of the present disclosure provide a vehicle.
  • the vehicle may include a battery pack, which is the battery pack described above.
  • the vehicle has all the beneficial effects of the battery pack provided by the present disclosure, which will not be repeated here.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

公开了一种下壳体、电池包及车辆。下壳体包括相互连接的多根边梁，边梁的边角处形成有切口，以在相邻两根边梁对接后使得相邻的两个切口构成容纳槽，以用于填充密封材料。

Description

下壳体、电池包及车辆
相关申请的交叉引用
本申请要求在2021年8月19日在中国提交的中国专利申请号202121959964.0的优先权，其全部内容通过引用并入本文。
技术领域
本公开涉及车辆制造技术领域，具体地，涉及一种下壳体、电池包及车辆。
背景技术
动力电池包作为电动汽车的重要组成部分，电池的质量不仅决定了电动汽车的行驶里程，也影响着整车的质量。电池包一般包括下壳体，在电池包的装配过程中，如果下壳体的密封性难以保证，会有整个电池包密封失效的风险，从而导致电池包的使用寿命降低，影响电动汽车的行驶里程。
公开内容
本公开提供了一种下壳体、一种包括所述下壳体的电池包和一种配置有所述电池包的车辆。
一方面，本公开的实施方案提供了一种下壳体，所述下壳体包括相互连接的多根边梁，所述边梁的边角处形成有切口，以在相邻两根所述边梁对接后使得相邻的两个所述切口构成容纳槽，以用于填充密封材料。
在一些实施方案中，所述容纳槽中的密封材料设置成与所述边梁的水平边平齐。
在一些实施方案中，所述切口构造为从所述边梁的水平边朝向所述边梁的竖直边倾斜的斜切结构。
在一些实施方案中，所述切口的切口面的倾斜角度α为30°～60°，所述切口的竖直方向的投影长度与所述边梁的高度比为1:6～1:13，所述切口的水平方向投影长度等于所述切口的竖直方向的投影长度。
在一些实施方案中，所述边梁包括上边角和下边角，所述上边角和所述下边角处均设置有所述切口。
在一些实施方案中，相邻两个所述边梁中的一者构造为具有侧边壁的型腔结构，另一种构造为具有底边壁的型腔结构，所述侧边壁上形成有第一安装孔，所述底边壁上形成有与所述第一安装孔对应的第二安装孔，相邻的两根所述边梁通过贯穿所述第一安装孔和所述第二安装孔的紧固件连接。
在一些实施方案中，相邻两根所述边梁的接触面之间填充有密封材料，以形成密封层，所述密封层完全覆盖所述接触面，并且，所述密封层的厚度配置为使得相邻两根所述边梁能够分别与所述密封层过盈配合。
另一方面，本公开的实施方案提供了一种电池包，包括电芯，以及自上而下依次连接的上壳体、下壳体和底护板，所述电芯容纳在所述下壳体内部，所述下壳体为根据以上任一实施方案中所述的下壳体。
在一些实施方案中，所述上壳体的底面与所述下壳体的顶面之间设置有第一密封条，所述下壳体的底面和所述底护板的顶面之间设置有第二密封条。
在一些实施方案中，所述下壳体的顶面和底面上均形成有所述容纳槽，所述第一密封条和所述第二密封条分别粘贴于容纳在所述容纳槽内的密封材料上。
在一些实施方案中，所述第一密封条和所述第二密封条各自由柔性材质制成。
再一方面，本公开的实施方案提供了一种车辆，包括电池包，所述电池包为根据以上任一实施方案中所述的电池包。
本公开技术方案提供的下壳体，通过在边梁上设置切口，相邻的两个切口能够形成为容纳槽，以为填充在相邻在两根边梁之间的密封材料提供填充空间，从而保证密封材料的填充容量。本公开实施例中可以通过填充到容纳槽中的密封材料来补偿两相邻边梁之间由于安装或制造原因产生的高度差，保证两根边梁之间的密封效果和边梁密封面的平面度，从而进一步确保边梁与其他部件的接触面可以良好贴合。
本公开的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本公开的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本公开，但并不构成对本公开的限制。在附图中：
图1是本公开示例性实施方式提供的电池包的结构示意图；
图2是图1中A部分的局部放大图；
图3是本公开示例性实施方式提供的电池包的后视图；
图4是图3中B部分的局部放大图；
图5是本公开示例性实施方式提供的相邻两梁之间未填充密封胶的示意图。
附图标记说明
11边梁；111切口；112侧边壁；113底边壁；
2容纳槽；3密封胶；4上壳体；5底护板；
61第一密封条；62第二密封条
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本公开，并不用于限制本公开。
在本公开中，在未作相反说明的情况下，使用的方位词如“上”、“下”、“顶”、“底”是根据本公开实施例提供的下壳体和电池包正常安装的情况定义的，具体可参照图3所示的图面方向。“内”和“外”是指相应部件轮廓的内和外。本公开中使用的术语如“第一”和“第二” 等是为了区别一个要素和另一个要素，不具有顺序性和重要性。此外，下面的描述在涉及附图时，不同附图中的同一附图标记表示相同或相似的要素。
参照图1至图5，本公开实施例提供的一种下壳体，该下壳体可以包括相互连接的多根边梁11，以围成边框结构，可以保证下壳体具有足够的安全性和稳定性，该下壳体可以用于容纳电池模组，或者，在CTP(Cell to Pack，无模组)技术中，该下壳体可以用于容纳下面将提到的电芯，如刀片电池等，能够保证电芯安装时的可靠性。边梁11的边角处可以形成有切口111，以在相邻两根边梁11对接后使得相邻的两个切口111构成容纳槽2，可以形成为填充密封材料3的容纳空间，以用于填充密封材料3。这里，边梁11的边角处指的是两个相邻边梁11接触的边角，如当边梁11为方形时，边角即为边梁11的四个角。通过在边梁11本体上形成的容纳槽2，能够有效地保证密封材料3填充的稳定性。在一些实施例中，密封材料3可以为密封胶，密封胶能够随着容纳槽2的密封面形状而变形，具有一定粘结性，或者也可以为其他具有密封效果的材料。通过密封材料3的填充，能够有效地提高边梁11密封面的平面度，避免相邻两根边梁11之间高度偏差太大引起的气密性失效问题，可以保证容纳在下壳体内电芯的稳定性和安全性，防止外部的气体或液体进入下壳体，影响电芯的使用寿命。并且，在容纳槽2内填充密封材料3时，工作人员可以将密封材料3抹平，以进一步减少相邻两根边梁11之间的高度差，从而确保密封面的平整。
本公开实施例提供的下壳体，通过在边梁11上设置切口111，相邻的两个切口111能够形成为容纳槽2，以为填充在相邻在两根边梁11之间的密封材料3提供填充空间，从而保证密封材料3的填充容量。本公开实施例中可以通过填充到容纳槽中2的密封材料3来补偿两相邻边梁11之间由于安装或制造原因产生的高度差，保证两根边梁11之间的密封效果和边梁11密封面的平面度，从而进一步确保边梁11与其他部件的接触面可以良好贴合。
在一些实施例中，容纳槽2中的密封材料3可以设置成与边梁11的水平边平齐。例如可以在容纳槽2中填充密封材料3后，通过工作人员将密封材料3抹平，使得密封材料3与上壳体和底护板5之间可以以平面接触而保证密封性。这里，也可以使得密封材料3的一端与较高的边梁平齐，另一端与较低的边梁11平齐，使得密封材料3作为二者之间的过渡结构，从而可以进一步减少高度差太大所引起气密失效问题。在实际应用中，可以根据具体的边梁11高度差位置来确定密封材料3的抹平效果。
参照图1和图5，切口111构造为从边梁11的水平边朝向边梁111的竖直边倾斜的斜切结构，可以便于密封材料3至多地填充在容纳槽2内。在一些实施例中，容纳槽2可以构造为V型结构，V型结构的边壁可以引导密封材料，以便于能够被密封材料3填满，同时成型简单方便，能够保证边梁11的整体强度，且有效地提高了边梁11之间的装配效率。在其他实施例中，容纳槽2也可以构造为底部为弧形的结构。
进一步地，参照图5，在一些实施例中，切口111的切口面的倾斜角度α可以为30°～60°，例如α＝45°；切口111的竖直方向的投影长度与边梁11的高度比可以为1:6～1:13，切口111的水平方向投影长度可以等于切口111的竖直方向的投影长度，当边梁11的高度为40cm 时，切口111竖直方向的投影长度可以为3cm～7cm，例如5cm，相应地，切口111水平方向的投影长度可以为5cm。该比例范围能够适应于不同高度的边梁11，使得容纳槽2的高度可以满足各种情况下的高度差需求。具体地，参照图5，倾斜角度指的是切口111相对于水平面(即垂直于图5的图面的平面)的角度，水平方向的投影长度即指的是切口111向图面上下方向正投影的长度，竖直方向的投影程度指的是切口111向图面左右方向正投影的长度。该尺寸范围的切口111便于制造，且不会破坏边梁11的整体结构，能够保证密封材料3填充的稳定性和足够的填充量，从而保证边梁11密封面的平面度和边梁11的密封效果。
参照图1和图5，边梁11包括上边角和下边角，上边角和下边角处可以均设置有切口111，以进一步提高密封材料3的填充量，并确保相邻两边梁11的上表面和下表面的平整度，保证边梁11之间的密封效果。如在边梁11的顶面与上壳体连接、底面与底板连接时，在上下两边角处均设置切口111，可以保证边梁11与上下两侧的部件均紧密连接，从而保证电芯能够被密封在电池包中。
参照图1，相邻两个边梁11中的一者构造为具有侧边壁112的型腔结构，另一种构造为具有底边壁113的型腔结构，侧边壁112上形成有第一安装孔，底边壁113上形成有与第一安装孔对应的第二安装孔，相邻的两根边梁11通过贯穿第一安装孔和第二安装孔的紧固件连接。底边壁113可以为相应边梁11靠近电芯的一侧的壁，侧边壁112可以为相应边梁11的垂直于电芯的一侧的壁，一方面，该型腔能够保证紧固件安装位置的稳定性，以使得紧固件能够保证相邻两根边梁11之间的连接效果；另一方面，型腔可以将紧固件与其他设置在下壳体周围的部件有效隔离，例如线束，以避免紧固件与线束之间发生干涉。在一些实施例中，用于连接相邻两根边梁11的紧固件可以螺栓，第一安装孔和第二安装孔可以形成为能够与该螺栓相匹配的螺纹孔，使得相邻两根边梁11之间能够可拆卸地连接，以便于工作人员对下壳体的检修与维护，同时，能够有效地提高相邻两根边梁11之间的连接强度。在螺栓连接两个边梁11时，容易在螺栓的安装过程导致两边梁11的上下边缘不对齐，因此，本公开提供的边梁11可以很好地解决这一技术问题，通过使用本公开提供的边梁11以及结合螺栓的连接方式，使得电池包的密封效果更佳，并使得下壳体的安装更加方便。在其他实施例中，边梁11也可以通过粘接的方式连接。
参照图2、图4和图5，相邻两根边梁11的接触面之间填充有密封材料3，以形成密封层，填充相邻两根边梁11接触面之间形成密封层的密封材料3也可以为密封胶，使得密封材料3不仅能够填充两根边梁11之间存在的间隙，以保证两根边梁11之间的密封效果，同时，密封材料3还能够提高两根边梁11之间的连接强度，提高多根边梁11之间的整体效果，确保边梁11之间连接的稳定性，以避免容纳在下壳体内电芯受到损坏，从而提高电芯的使用寿命。这里，两个边梁11接触面之间的密封材料3可以为预先涂覆在接触面上，并可以保证当两个边梁11通过螺栓固定后，密封材料3可以从四周溢出，以保证密封效果。或者，两个边梁11接触面之间的密封材料3可以来源于容纳槽2内的密封材料3，具体地，可以首先将密封材料3填充到容纳槽2内，然后通过挤压的方式，使得密封材料3从两个 边梁11之间的间隙流入，从而更加全面的对两边梁11之间的间隙进行密封。通过使密封层完全覆盖相邻两跟边梁11的接触面，可以进一步地提高两根边梁11之间的连接效果和密封效果。密封层的厚度可以配置为使得相邻两根边梁11能够分别与密封层过盈配合，使得密封层能够部分地包裹于相邻两根边梁11相互接触的端面，大大地加强了密封材料3对相邻两跟边梁11之间的密封效果，确保了相邻两根边梁11之间连接的可靠性。在一些实施例中，工作人员可以将此处的密封材料3抹平，一方面能够提高边梁11外轮廓表面的平整度，同时能够有效地确保密封材料3对边梁11之间的密封效果，避免密封胶3填充过量，造成资源浪费或从相邻两根边梁11之间的间隙中溢出。并且，可以在相邻两根边梁11连接处的外表面可以贴设有密封条等密封结构，以进一步确保密封材料3不会沿垂直于图5的纸面的方向溢出。
本公开另一方面的实施例还提供了一种电池包，参照图1。本公开实施例提供的电池包可以包括电芯或由多个电芯组成的电池模组，以及自上而下依次连接的上壳体4、下壳体和底护板5，该下壳体为根据以上所述的下壳体，电芯或电池模组均可以被容纳在上壳体4、下壳体以及底护板5围成的封闭空间内，以得到充分的保护。该电池包具有上述下壳体的所有有益效果，这里不再赘述。
进一步地，参照图1，上壳体4的底面与下壳体的顶面(即边梁11的顶面)之间可以设置有第一密封条61，以提高上壳体4和下壳体之间的密封效果；下壳体的底面(即边梁11的底面)和底护板5的顶面之间可以设置有第二密封条62，以提高下壳体和底护板5之间的密封效果，从而确保电池包的密封性能，进而提高电池包的使用寿命。
参照1、图4和图5，下壳体的顶面和底面上均可以形成有容纳槽2，以使得下壳体的底面和顶面上均能够填充有密封材料3，以进一步提高了边梁11的顶面和底面的平面度，提高边梁11之间的密封效果。同时，第一密封条61和第二密封条62可以分别粘贴于相应的容纳槽2内的密封材料3上，在密封材料填充至容纳槽2内并被抹平后，密封条可以粘接在抹平后的密封材料上。一方面，能够进一步地确保相邻两边梁11之间的连接效果，并进一步提高相邻两边梁11连接位置的密封性。
在一些实施例中，第一密封条61和第二密封条62可以分别由柔性材质制成。例如，橡胶材质等。这样，不仅能够通过第一密封条61提升上壳体4和下壳体之间的密封效果，通过第二密封条62提升下壳体与底护板5之间的密封效果，以保证电池包的密封性；还可以在电池包受到外力挤压时，第一密封条61和第二密封条62均能够起到一定的缓冲作用。同时，第一密封条61还可以减少上壳体4和下壳体之间的磨损，第二密封条62还可以减少下壳体与底护板5之间的磨损，以能够提高下壳体、上壳体4以及底护板5之间的安全性，进而提高电池包的使用寿命。
本公开再一方面的实施例提供了一种车辆。该车辆可以包括电池包，该电池包为以上所述的电池包。该车辆具有本公开提供的电池包的所有有益效果，这里不再赘述。
以上结合附图详细描述了本公开的优选实施方式，但是，本公开并不限于上述实施方式中的具体细节，在本公开的技术构思范围内，可以对本公开的技术方案进行多种简单变 型，这些简单变型均属于本公开的保护范围。
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本公开对各种可能的组合方式不再另行说明。
此外，本公开的各种不同的实施方式之间也可以进行任意组合，只要其不违背本公开的思想，其同样应当视为本公开所公开的内容。

Claims (12)

  1. 一种下壳体，包括相互连接的多根边梁(11)，所述边梁(11)的边角处形成有切口(111)，以在相邻两根所述边梁(11)对接后使得相邻的两个所述切口(111)构成容纳槽(2)，以用于填充密封材料(3)。
  2. 根据权利要求1所述的下壳体，其中所述容纳槽(2)中的密封材料(3)设置成与所述边梁(11)的水平边平齐。
  3. 根据权利要求1或2所述的下壳体，其中所述切口(111)构造为从所述边梁(11)的水平边朝向所述边梁(111)的竖直边倾斜的斜切结构。
  4. 根据权利要求1至3中任一项所述的下壳体，其中所述切口(111)的切口面的倾斜角度α为30°～60°，所述切口(111)的竖直方向的投影长度与所述边梁(11)的高度比为1:6～1:13，所述切口(111)的水平方向投影长度等于所述切口(111)的竖直方向的投影长度。
  5. 根据权利要求1至4中任一项所述的下壳体，其中所述边梁(11)包括上边角和下边角，所述上边角和所述下边角处均设置有所述切口(111)。
  6. 根据权利要求1至5中任一项所述的下壳体，其中相邻两个所述边梁(11)中的一者构造为具有侧边壁(112)的型腔结构，另一种构造为具有底边壁(113)的型腔结构，所述侧边壁(112)上形成有第一安装孔，所述底边壁(113)上形成有与所述第一安装孔对应的第二安装孔，相邻的两根所述边梁(11)通过贯穿所述第一安装孔和所述第二安装孔的紧固件连接。
  7. 根据权利要求1至6中任一项所述的下壳体，其中相邻两根所述边梁(11)的接触面之间填充有密封材料(3)，以形成密封层，所述密封层完全覆盖所述接触面，并且，所述密封层的厚度配置为使得相邻两根所述边梁(11)能够分别与所述密封层过盈配合。
  8. 一种电池包，包括电芯，以及自上而下依次连接的上壳体(4)、下壳体和底护板(5)，所述电芯容纳在所述下壳体内部，所述下壳体为根据权利要求1至7中任一项所述的下壳体。
  9. 根据权利要求8所述的电池包，其中所述上壳体(4)的底面与所述下壳体的顶面之间设置有第一密封条(61)，所述下壳体的底面和所述底护板(5)的顶面之间设置有第二密封条(62)。
  10. 根据权利要求8或9所述的电池包，其中所述下壳体的顶面和底面上均形成有所述容纳槽(2)，所述第一密封条(61)和所述第二密封条(62)分别粘贴于容纳在所述容纳槽(2)内的密封材料(3)上。
  11. 根据权利要求9或10所述的电池包，所述第一密封条(61)和所述第二密封条(62)各自由柔性材质制成。
  12. 一种车辆，包括电池包，其中所述电池包为根据权利要求8至11中任一项所述的电池包。
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