WO2019174077A1 - 封板以及电池模组 - Google Patents

封板以及电池模组 Download PDF

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Publication number
WO2019174077A1
WO2019174077A1 PCT/CN2018/081986 CN2018081986W WO2019174077A1 WO 2019174077 A1 WO2019174077 A1 WO 2019174077A1 CN 2018081986 W CN2018081986 W CN 2018081986W WO 2019174077 A1 WO2019174077 A1 WO 2019174077A1
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WO
WIPO (PCT)
Prior art keywords
battery module
sealing plate
main body
body portion
cylindrical casing
Prior art date
Application number
PCT/CN2018/081986
Other languages
English (en)
French (fr)
Inventor
章华
游志毅
马林
何润泳
秦峰
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.)
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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
Publication of WO2019174077A1 publication Critical patent/WO2019174077A1/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
    • H01M50/204—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
    • 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 utility model relates to the technical field of power batteries, in particular to a sealing plate and a battery module.
  • the battery module includes a plurality of power batteries, a sealing plate and a cylindrical casing.
  • the cylindrical casing included in the battery module directly contacts the casing bottom plate.
  • the battery module is fixed to the cabinet through the sealing plate.
  • the flatness of the bottom plate of the cabinet is poor, and there may even be a case where the edge of the middle convex portion is recessed. At this time, stress concentration occurs in the middle portion of the cylindrical casing of the battery module, thereby causing damage to the battery module. influences.
  • the embodiment of the present invention provides a sealing plate and a battery module.
  • the sealing plate can be used for the battery module to ensure a gap between the battery module and the bottom plate of the box for accommodating the battery module, so as to prevent the box from exerting pressure on the battery module and causing stress concentration in the corresponding area of the battery module. happening.
  • an embodiment of the present invention provides a sealing plate for a battery module, comprising: a main body portion having a plate shape, the main body portion including a first surface, a second surface, a top surface, and a bottom surface, the first surface And the second surface is opposite to the thickness direction of the main body portion, and the second surface is disposed for the unit cell facing the battery module, the top surface and the bottom surface are opposite to each other in the height direction of the main body portion; the connecting post is connected to the connecting post A surface extends in the height direction, and one end of the connecting post near the bottom surface extends over the bottom surface to form a protrusion.
  • the protruding portion has an end surface parallel to the bottom surface.
  • the connecting post is a cylindrical structure.
  • the connecting post and the main body portion are integrally formed.
  • the connecting post is welded to the body portion.
  • the number of the connecting posts is two, and the two connecting posts are spaced apart in the width direction.
  • the end faces of the two connecting posts each have a flat surface and are coplanar with each other.
  • the length of the protruding portion over the bottom surface of the body portion is 0.5 mm to 1.5 mm.
  • a sealing plate according to an embodiment of the present invention includes a main body portion and a connecting post.
  • the sealing plate of the embodiment of the present invention can be applied to a battery module.
  • the battery module When the battery module is assembled to form a battery pack, the battery module can be connected and fixed to the cabinet through the connecting post included in the sealing plate of the embodiment. Since the projecting portion of the connecting post passes over the main body portion and can be protruded from the cylindrical casing, a gap is formed between the cylindrical casing and the bottom plate of the casing.
  • the cylindrical casing of the battery module can still ensure no contact with the convex portion of the casing, thereby avoiding the tubular shape. Stress concentration occurs in the area of the housing opposite to the convex portion, which is advantageous for improving the position stability and safety of the battery module.
  • an embodiment of the present invention provides a battery module, including:
  • a cylindrical casing the opposite ends are provided with openings; a single battery, a plurality of single cells are disposed in the cylindrical casing; two sealing plates as described above, and two sealing plates are disposed at the two openings of the cylindrical casing
  • the second surface of the main body portion faces the unit cell, and the main body portion is sealingly connected with the cylindrical casing to enclose the plurality of unit cells; wherein the cylindrical casing has a bottom plate near the bottom surface, and the protruding portion passes over the cylindrical casing The outer surface of the bottom plate.
  • the outer surface and the end surface of the protruding portion are both planar, and the end surface and the outer surface are parallel to each other.
  • FIG. 1 is a schematic view showing the overall structure of a sealing plate according to an embodiment of the present invention.
  • FIG. 2 is a schematic front view showing the entire structure of the sealing plate according to an embodiment of the present invention.
  • FIG. 3 is an overall structural view of a battery module according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing a connection structure between a battery module and a case according to an embodiment of the present invention.
  • X thickness direction
  • Y height direction
  • Z width direction
  • installation should be understood broadly, unless otherwise explicitly defined and limited. For example, it may be a fixed connection or Removable connection, or integral connection; can be directly connected or indirectly connected through an intermediate medium.
  • connection should be understood broadly, unless otherwise explicitly defined and limited. For example, it may be a fixed connection or Removable connection, or integral connection; can be directly connected or indirectly connected through an intermediate medium.
  • specific meanings of the above terms in the present invention can be understood as the case may be.
  • Fig. 1 schematically shows the overall structure of a sealing plate according to an embodiment of the present invention.
  • Fig. 2 is a schematic front elevational view showing the overall structure of a sealing plate according to an embodiment of the present invention.
  • the sealing plate of the embodiment of the present invention is applied to a battery module.
  • the battery module of this embodiment includes a cylindrical casing and a plurality of unit cells disposed in the cylindrical casing.
  • the sealing plate is disposed at the opening of the cylindrical casing and is sealingly connected with the cylindrical casing to encapsulate the single battery.
  • the sealing plate of the embodiment of the present invention includes a main body portion 1 and a connecting post 2 disposed on the main body portion 1 .
  • the sealing plate of the present embodiment is fixedly connected to the cylindrical casing by the main body portion 1, and the connecting post 2 is disposed on the surface of the main body portion 1 facing away from the unit cell.
  • the main body portion 1 of the embodiment has a plate shape to effectively reduce the overall weight of the battery module.
  • the shape of the main body portion 1 is matched with the cross-sectional shape of the cylindrical casing.
  • the sealing plate has a rectangular structure, and the cylindrical casing used in cooperation with the sealing plate also has a rectangular torus. .
  • the battery module can be connected to the external structure through the connecting column 2.
  • each battery module can be connected and fixed to the box through the connecting column 2 to ensure the battery module.
  • the position on the cabinet itself is stable.
  • the main body portion 1 of the embodiment of the present invention has a plate-like structure.
  • the body portion 1 has a predetermined thickness, width, and height.
  • the thickness direction X, the height direction Y, and the width direction Z appearing in the present invention are all referred to by the thickness, width, and height of the main body portion 1.
  • the thickness direction X, the height direction Y, and the width direction Z are perpendicular to each other and are shown in a coordinate system in the drawing.
  • the main body portion 1 of the present embodiment includes a first surface 11, a second surface 12, a top surface 13, and a bottom surface 14, wherein the first surface 11 and the second surface 12 are opposite in the thickness direction X, and The second surface 12 is provided for facing the unit cells of the battery module, and the top surface 13 and the bottom surface 14 are opposed in the height direction Y.
  • the connecting post 2 of the embodiment of the present invention is disposed on the first surface 11 and extends in the height direction Y. One end of the connecting post 2 near the bottom surface 14 of the main body portion 1 extends over the bottom surface 14 to form the projecting portion 21.
  • the connecting posts 2 have two ends that are opposite in their axial direction, wherein one end is adjacent to the top surface 13 of the body portion 1 and the other end extends over the bottom surface 14 of the body portion 1 to form Extending portion 21.
  • the axial direction of the connecting post 2 is the same as the height direction Y.
  • the end faces 21a of the projecting portions 21 of the connecting post 2 and the bottom faces 14 of the main body portion 1 have different heights.
  • the cross section of the connecting post 2 of the present embodiment may be a columnar shape, a square column shape, or a semicircular semicircular shape.
  • the protruding portion 21 on the connecting post 2 simultaneously passes over the outer surface of the bottom plate of the cylindrical casing included in the battery module.
  • the battery module can be fixed to the cabinet through the connecting post 2. Since the protruding portion 21 is disposed beyond the cylindrical casing, after the battery module is connected to the casing, the end surface 21a of the protruding portion 21 is in contact with the bottom plate of the casing, and no contact occurs between the cylindrical casing and the casing. Instead, there is a predetermined gap.
  • the cylindrical casing of the battery module is not pressed against the convex portion of the casing, and the area on the cylindrical casing opposite to the convex portion is prevented from being pressed by the convex portion on the casing.
  • the stress concentration can improve the safety of the battery module during use.
  • the flatness requirement of the bottom plate of the box is reduced, and the manufacturing difficulty and cost are reduced.
  • the end surface 21a of the projecting portion 21 of the embodiment of the present invention is disposed in parallel with the bottom surface 14 of the main body portion 1.
  • the distance between the end surface 21a of the projecting portion 21 and the bottom surface 14 of the main body portion 1 is constant, so that the distance between the end surface 21a of the projecting portion 21 and the bottom surface 14 of the main body portion 1 can be flexibly adjusted according to product requirements.
  • the sealing plate having a different distance between the end surface 21a of the projecting portion 21 and the bottom surface 14 of the main body portion 1 is processed in the same production line, which reduces the manufacturing difficulty and cost.
  • the main body portion 1 of the sealing plate has a rectangular structure
  • the bottom surface 14 of the main body portion 1 is a plane perpendicular to the height direction Y
  • the end surface 21a of the protruding portion 21 is also a plane perpendicular to the height direction Y, thereby
  • the protrusion 21 is smoothly placed horizontally on the box body, and the end surface 21a of the protrusion portion 21 is larger than the bottom plate contact area of the box body, which is beneficial to improving the stability of the battery module.
  • the connecting post 2 of the present embodiment is a tubular structure.
  • the axial direction of the connecting post 2 is the same as the height direction Y.
  • the connecting post 2 has a central bore 22 extending in its own axial direction.
  • the connecting post 2 can be a sleeve or a sleeve. In this way, it is easy to use screws or rivets to pass through the connecting post 2, and the battery module can be quickly and stably mounted on the fixing case, which can also improve assembly efficiency.
  • the connecting post 2 and the main body portion 1 of the present embodiment may be of a separate structure.
  • the two are manufactured separately and then assembled to form a closure.
  • the connecting post 2 of the present embodiment and the main body portion 1 can be connected by welding.
  • the material of the connecting post 2 and the main body portion 1 may be made of a metal such as steel or aluminum.
  • the connecting post 2 and the main body portion 1 are connected and fixed by welding, which can ensure the joint strength of the two, so that the sealing plate has good impact resistance.
  • the connecting post 2 is connected to the main body portion 1 by welding
  • the locking pressure of the bolt or the screw cannot be directly transmitted to the cylindrical casing, but first passes through The weld bead between the connecting post 2 and the main body portion 1 is transferred to the cylindrical casing included in the battery module, and then transferred to the casing.
  • the weld bead between the connecting post 2 and the main body portion 1 will always have stress concentration, and the weld bead may be damaged or damaged.
  • the sealing plate of the embodiment When the sealing plate of the embodiment is applied to the battery module, bolts or screws are used to pass through the connecting post 2 and the battery module is locked to the casing, and a gap is formed between the cylindrical casing and the casing. Since the connecting post 2 is in direct contact with the housing, the locking pressure of the bolt or screw is transmitted directly through the connecting post 2 to the housing. After the bolt or the screw is locked, the weld formed between the connecting post 2 and the main body portion 1 does not cause stress concentration, and the safety of the battery module is ensured.
  • the connecting post 2 and the main body portion 1 of the present embodiment may also be an integrally formed structure, so that the formed sealing plate itself has high strength and good impact resistance.
  • the connecting post 2 and the body portion 1 can be fabricated by casting, stamping or extrusion.
  • the number of the connecting posts 2 of the present embodiment is two.
  • the two connecting columns 2 are spaced apart in the width direction Z perpendicular to the height direction Y. Both of the connecting columns 2 extend in the height direction Y such that the axes of the two are parallel to each other.
  • Each sealing plate provides two points of support, so that the two sealing plates connected to the cylindrical casing provide four-point support, which can improve the positional stability of the battery module relative to the casing.
  • the way of connecting two connecting columns 2 on each sealing plate can effectively reduce the overall weight of the battery module, and is beneficial to improving the energy density of the battery module. At the same time, it also reduces the amount of raw materials used in the overall processing and manufacturing of the sealing plate, and reduces the processing cost.
  • the end faces 21a of the respective projecting portions 21 of the two connecting posts 2 of the present embodiment are all flat.
  • the end faces 21a of the respective projecting portions 21 of the two connecting posts 2 are coplanar with each other.
  • the end face 21a of the projecting portion 21 is a plane perpendicular to the height direction Y.
  • the length of the projecting portion 21 of the present embodiment over the main body portion 1 is 0.5 mm to 1.5 mm.
  • the connecting post 2 is flexibly machined according to the product requirements or the processing error range of the flatness of the bottom plate of the casing so that the length of the projecting portion 21 over the bottom surface 14 of the main body portion 1 satisfies the requirements.
  • the processing error value of the flatness of the bottom plate of the cabinet can be understood as the difference between the highest and lowest points of the bottom plate.
  • the length of the overhanging portion 21 over the main body portion 1 needs to be greater than the difference to avoid contact between the cylindrical casing of the battery module and the bottom plate of the casing.
  • the sealing plate of the embodiment of the present invention is applied to a battery module.
  • the battery module When the battery module is assembled to form a battery pack, the battery module can be connected and fixed to the cabinet through the connecting post 2 included in the sealing plate of the embodiment. Since the projecting portion 21 of the connecting post 2 passes over the cylindrical casing, a gap is formed between the cylindrical casing and the bottom plate of the casing. In this way, when the flatness of the bottom plate of the box body is poor, for example, the middle portion is raised relative to the edge portion, the cylindrical casing of the battery module can still ensure no contact with the convex portion on the box body, thereby avoiding the tube. Stress concentration occurs in the area of the shell opposite to the convex portion, which is beneficial to improve the position stability and safety of the battery module, and indirectly reduces the difficulty in processing the box body.
  • FIG. 3 is a view schematically showing the overall structure of a battery module according to an embodiment of the present invention.
  • an embodiment of the present invention further provides a battery module including a cylindrical casing 3, a plurality of single cells (not shown) disposed in the cylindrical casing 3, and
  • the cylindrical casing 3 is connected to the sealing plate as described in the above embodiment.
  • the cylindrical casing 3 of the present embodiment has opposite ends along its own axial direction.
  • the axial direction of the cylindrical casing 3 is the same as the thickness direction X. Openings are provided at each end.
  • the sealing plate is used to cover the opening of the cylindrical casing 3 and is sealingly connected to the cylindrical casing 3 to encapsulate the unit cells inside the cylindrical casing 3.
  • the battery module of this embodiment includes two sealing plates. Two sealing plates are provided in the two openings of the cylindrical casing 3. The second surface 12 of the body portion 1 faces the unit cell. The main body portion 1 is sealingly connected to the cylindrical casing 3 to enclose a plurality of unit cells.
  • the cylindrical casing 3 of the present embodiment has a bottom plate (not shown) close to the bottom surface 14 of the main body portion 1.
  • the projecting portion 21 of the connecting post 2 passes over the outer surface of the bottom plate of the cylindrical casing 3 so as to protrude from the outer surface of the bottom plate in the height direction Y. In this way, when a plurality of battery modules of the present embodiment and the cabinet 4 are grouped, as shown in FIG.
  • each battery module is connected and fixed to the cabinet 4 through its own connecting post 2, and each battery module is simultaneously
  • the cylindrical casing 3 of the group does not come into contact with the bottom plate of the casing 4, but maintains a predetermined gap, thereby avoiding stress concentration in the region of the cylindrical casing 3 opposite to the protrusion, which is advantageous for improving the position stability of the battery module.
  • Sexuality also indirectly reduces the difficulty of processing the casing 4.
  • the outer surface of the bottom plate and the end surface 21a of the projection 21 are both planar, and the end surface 21a and the outer surface are parallel to each other.
  • the end surface 21a of the projecting portion 21 is in contact with the bottom plate of the casing 4, and a predetermined gap is maintained between the outer surface of the bottom plate and the casing 4.
  • the distance between the end surface 21a of the projecting portion 21 and the outer surface of the bottom plate is constant, and it is easy to flexibly adjust the distance between the end surface 21a of the projecting portion 21 and the outer surface of the bottom plate in accordance with product requirements.
  • the cylindrical casing 3 has a rectangular annular structure in cross section.
  • the cylindrical casing 3 of the present embodiment has a straight cylindrical structure as a whole, and has a bottom plate close to the bottom surface 14 of the main body portion 1, a top plate 31 close to the top surface 13 of the main body portion 1, and two side plates 32.
  • the main body portion 1 of the sealing plate has a rectangular structure and is matched with the cross-sectional shape of the cylindrical casing 3, and both have the same width and height.
  • the outer surface of the bottom plate is a plane perpendicular to the height direction Y, and the end surface 21a of the projecting portion 21 is also a plane perpendicular to the height direction Y, thereby facilitating the horizontally placing of the projecting portion 21 on the casing 4, Conducive to improving the stability of the battery module.

Abstract

一种封板以及电池模组。封板包括：主体部，呈板状，主体部包括第一表面、第二表面、顶面和底面，第一表面和第二表面在主体部自身厚度方向上相对、且第二表面用于朝向电池模组的单体电池设置，顶面和底面在主体部自身高度方向上相对；连接柱，连接柱设置于第一表面、且沿高度方向延伸，连接柱靠近底面的一端延伸越过底面以形成伸出部。封板能够用于电池模组，保证电池模组与用于容纳电池模组的箱体之间形成间隙，以避免箱体对电池模组局部施加压力而导致电池模组对应区域出现应力集中情况。

Description

封板以及电池模组 技术领域
本实用新型涉及动力电池技术领域，特别是涉及一种封板以及电池模组。
背景技术
随着科学技术的发展，对动力电池高能量密度的要求越来越高，动力电池轻量化得到越来越多企业的重视。动力电池同体积的情况下提高能量密度是目前的发展趋势。电池模组包括多个动力电池、封板和筒状壳体，多个电池模组封装于箱体内以形成电池包时，电池模组所包括的筒状壳体直接与箱体底板接触。电池模组通过封板与箱体连接固定。然而，箱体底板的平面度较差，甚至会存在中间凸起部分边缘凹陷的情况，此时，电池模组的筒状壳体的中间部分会出现应力集中，从而会对电池模组造成不良影响。
实用新型内容
本实用新型实施例提供一种封板以及电池模组。封板能够用于电池模组，保证电池模组与用于容纳电池模组的箱体底板之间形成间隙，以避免箱体对电池模组局部施加压力而导致电池模组对应区域出现应力集中情况。
一方面，本实用新型实施例提出了一种用于电池模组的封板，其包括：主体部，呈板状，主体部包括第一表面、第二表面、顶面和底面，第一表面和第二表面在主体部自身厚度方向上相对、且第二表面用于朝向电池模组的单体电池设置，顶面和底面在主体部自身高度方向上相对；连接柱，连接柱设置于第一表面、且沿高度方向延伸，连接柱靠近底面的一端延伸越过底面以形成伸出部。
根据本实用新型实施例的一个方面，伸出部具有与底面平行的端面。
根据本实用新型实施例的一个方面，连接柱为筒状结构体。
根据本实用新型实施例的一个方面，连接柱与主体部为一体成型结构。
根据本实用新型实施例的一个方面，连接柱与主体部焊接连接。
根据本实用新型实施例的一个方面，连接柱的数量为两个，两个连接柱在宽度方向上间隔设置。
根据本实用新型实施例的一个方面，两个连接柱各自具有的伸出部的端面为平面、且彼此共面。
根据本实用新型实施例的一个方面，伸出部越过主体部的底面的长度为0.5毫米至1.5毫米。
根据本实用新型实施例提供的封板，其包括主体部和连接柱。本实用新型实施例的封板可以应用于电池模组。在电池模组组装形成电池包时，电池模组可以通过本实施例封板所包括的连接柱与箱体连接固定。由于连接柱的伸出部越过主体部且可以凸出筒状壳体设置，因此筒状壳体与箱体的底板之间形成有间隙。这样，当箱体的平面度较差时，例如出现中间区域相对于边缘区域发生凸起，电池模组的筒状壳体仍可以保证不与箱体上凸起部分发生接触，从而避免筒状壳体上与凸起部分相对的区域出现应力集中情况，有利于提高电池模组的位置稳定性和安全性。
另一个方面，本实用新型实施例提供一种电池模组，其包括：
筒状壳体，相对的两端设置开口；单体电池，多个单体电池设置于筒状壳体内；两个如上述的封板，两个封板设置于筒状壳体的两个开口，主体部的第二表面朝向单体电池，主体部与筒状壳体密封连接、以封装多个单体电池；其中，筒状壳体具有靠近底面的底板，伸出部越过筒状壳体的底板的外表面。
根据本实用新型实施例的另一个方面，外表面和伸出部的端面均为平面，端面与外表面相互平行。
附图说明
下面将参考附图来描述本实用新型示例性实施例的特征、优点和技术效果。
图1是本实用新型一实施例的封板整体结构示意图；
图2是本实用新型一实施例的封板整体正视结构示意图；
图3是本实用新型实施例的电池模组整体结构意图；
图4是本实用新型一实施例的电池模组与箱体连接结构示意图。
在附图中，附图并未按照实际的比例绘制。
标记说明：
1、主体部；11、第一表面；12、第二表面；13、顶面；14、底面；
2、连接柱；21、伸出部；21a、端面；22、中心孔；
3、筒状壳体；31、顶板；32、侧板；
4、箱体；
X、厚度方向；Y、高度方向；Z、宽度方向。
具体实施方式
下面结合附图和实施例对本实用新型的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本实用新型的原理，但不能用来限制本实用新型的范围，即本实用新型不限于所描述的实施例。
在本实用新型的描述中，需要说明的是，除非另有说明，“多个”的含义是两个或两个以上；术语“上”、“下”、“左”、“右”、“内”等指示的方位或位置关系仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本实用新型的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以 通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本实用新型中的具体含义。
为了更好地理解本实用新型，下面结合图1和图2对本实用新型实施例的用于电池模组的封板进行详细描述。
图1示意性地显示了本实用新型一实施例的封板整体结构。图2示意性地显示了本实用新型一实施例的封板整体结构的正视图。
本实用新型实施例的封板，应用于电池模组。本实施例的电池模组包括筒状壳体以及设置于筒状壳体内的多个单体电池。在封板应用于电池模组时，封板设置于筒状壳体的开口处，并与筒状壳体密封连接，以封装单体电池。
参照图1所示，本实用新型实施例的封板包括主体部1以及设置于主体部1上的连接柱2。在封板应用于电池模组时，本实施例的封板通过主体部1与筒状壳体连接固定，而连接柱2设置于主体部1背向单体电池的表面上。本实施例的主体部1呈板状，以有效减轻电池模组的整体重量。优选地，主体部1的形状与筒状壳体的横截面形状相配合，在一个示例中，封板为矩形结构，与封板相配合使用的筒状壳体的横截面也为矩形环面。电池模组可以通过连接柱2与外部结构体连接，例如将多个电池模组安装固定于一个箱体内成组时，各个电池模组可以通过连接柱2与箱体连接固定，保证电池模组在箱体上的自身位置稳定。
本实用新型实施例的主体部1自身呈板状结构。主体部1具有预定的厚度、宽度和高度。本实用新型中出现的厚度方向X、高度方向Y和宽度方向Z均以主体部1的厚度、宽度和高度为参照。厚度方向X、高度方向Y和宽度方向Z两两相互垂直，并在图示中以坐标系的方式示出。
参照图2所示，本实施例的主体部1包括第一表面11、第二表面12、顶面13和底面14，其中，第一表面11和第二表面12在厚度方向X上相对、且第二表面12用于朝向电池模组的单体电池设置，顶面13和底面14在高度方向Y上相对。本实用新型实施例的连接柱2设置于第一表面11、且沿高度方向Y延伸。连接柱2靠近主体部1的底面14的一端延 伸越过该底面14以形成伸出部21。在一个实施例中，连接柱2具有在自身轴向上相对的两个端部，其中，一个端部靠近主体部1的顶面13，另一个端部延伸越过主体部1的底面14而形成伸出部21。连接柱2的轴向与高度方向Y相同。在高度方向Y上，连接柱2的伸出部21的端面21a与主体部1的底面14各自相对高度不同。本实施例的连接柱2的横截面可以是圆柱状，也可以是方柱状，还可以是半方半圆状。
本实施例的封板应用于电池模组时，在高度方向Y上，连接柱2上的伸出部21同时越过电池模组所包括的筒状壳体的底板外表面。在多个电池模组同时设置于箱体内以组成电池包时，电池模组可以通过连接柱2与箱体连接固定。由于伸出部21越过筒状壳体设置，因此电池模组与箱体连接后，伸出部21的端面21a与箱体的底板相接触，而筒状壳体与箱体之间不发生接触，而是留有预定间隙。这样，电池模组的筒状壳体不会被箱体上凸出的部分抵压到，避免筒状壳体上与凸出的部分相对的区域受到箱体上凸出部分的抵压而出现应力集中情况，可以提升电池模组使用过程的安全性。同时，降低了箱体的底板平面度要求，降低加工制造难度和成本。
本实用新型实施例的伸出部21的端面21a与主体部1的底面14平行设置。伸出部21的端面21a与主体部1的底面14之间的距离为定值，从而易于根据产品要求，灵活调整伸出部21的端面21a与主体部1的底面14之间的距离，可以在同一生产线加工制造伸出部21的端面21a与主体部1的底面14之间的距离不同的封板，降低加工制造难度和成本。在一个示例中，封板的主体部1为矩形结构，主体部1的底面14为与高度方向Y相垂直的平面，伸出部21的端面21a也为与高度方向Y相垂直的平面，从而有利于伸出部21平稳地水平放置于箱体上，同时伸出部21的端面21a与箱体的底板接触区域大，有利于提升电池模组的稳定性。
参照图1或图2所示，本实施例的连接柱2为筒状结构体。连接柱2的轴向与高度方向Y相同。连接柱2具有沿自身轴向延伸的中心孔22。在一个示例中，连接柱2可以是套筒或套管。这样，便于使用螺钉或者铆钉穿过连接柱2，并快速且稳固地将电池模组安装固定箱体上，也可以提高 组装效率。
本实施例的连接柱2和主体部1可以是分体结构。两者各自独立加工制造，然后再组装形成封板。本实施例的连接柱2与主体部1可以通过焊接连接。连接柱2和主体部1分材料可以是钢或铝等金属材质。连接柱2和主体部1通过焊接的方式连接固定，能够保证两者连接强度，使得封板具有良好的抗冲击性能。
在连接柱2与主体部1通过焊接连接的实施例中，当连接柱2没有延伸越过主体部1时，螺栓或螺钉的锁紧压力无法直接传递到筒状壳体上，而是首先会通过连接柱2与主体部1之间的焊缝传递到电池模组所包括的筒状壳体上，然后才传递到箱体上。这样，螺栓或螺钉锁紧后，连接柱2与主体部1之间的焊缝会时刻存在应力集中情况，焊缝会存在蠕变或破坏等风险。本实施例的封板应用于电池模组时，使用螺栓或螺钉穿过连接柱2并将电池模组锁紧到箱体上，筒状壳体与箱体之间形成间隙。由于连接柱2与箱体直接接触，因此螺栓或螺钉的锁紧压力直接通过连接柱2传递到箱体上。螺栓或螺钉的锁紧后，连接柱2和主体部1之间形成的焊缝不会产生应力集中情况，保证电池模组使用过程安全性。
本实施例的连接柱2和主体部1也可以是一体成型结构，从而形成的封板自身强度高，具有良好的抗冲击性能。在一个示例中，连接柱2和主体部1可以通过铸造、冲压或者挤压的方式加工制造。
参照图1或图2所示，本实施例的连接柱2的数量为两个。两个连接柱2在与高度方向Y相垂直的宽度方向Z上间隔设置。两个连接柱2均沿高度方向Y延伸，从而两者的轴线相互平行。每个封板提供两点支承，从而与筒状壳体相连接的两个封板提供四点支承，可以提升电池模组相对于箱体的位置稳定性。在使用四个连接柱2保证电池模组安装稳定性的前提下，每个封板上设置两个连接柱2的方式能够有效减轻电池模组的整体重量，有利于提高电池模组的能量密度，同时也减少封板整体加工制造所使用的原料量，降低加工成本。
本实施例的两个连接柱2各自的伸出部21的端面21a均为平面。两个连接柱2各自的伸出部21的端面21a彼此共面。在一个实施例中，伸出部 21的端面21a为与高度方向Y相垂直的平面。电池模组安装于箱体上时，可以保证电池模组所包括的四个连接柱2的伸出部21的端面21a与箱体底板之间形成的支承面处于同一平面，以提升电池模组的位置稳定性。
本实施例的伸出部21越过主体部1的长度为0.5毫米至1.5毫米。根据产品要求或者箱体底板的平面度的加工误差范围，灵活加工制造连接柱2，以使伸出部21上越过主体部1的底面14的长度满足要求。箱体底板的平面度的加工误差值可以理解为底板最高处与最低处的差值。伸出部21上越过主体部1的长度需要大于该差值，以避免电池模组的筒状壳体与箱体的底板之间发生接触。
本实用新型实施例的封板应用于电池模组。在电池模组组装形成电池包时，电池模组可以通过本实施例封板所包括的连接柱2与箱体连接固定。由于连接柱2的伸出部21越过筒状壳体，因此筒状壳体与箱体的底板之间形成有间隙。这样，当箱体底板的平面度较差时，例如出现中间区域相对于边缘区域发生凸起，电池模组的筒状壳体仍可以保证不与箱体上凸起部分发生接触，从而避免筒状壳体上与凸起部分相对的区域出现应力集中情况，有利于提高电池模组的位置稳定性和安全性，也间接地降低了对箱体加工制造难度要求。
图3示意性地显示了本实用新型一实施例的电池模组整体结构。
参照图3所示，本实用新型实施例还提出一种电池模组，其包括筒状壳体3、设置于筒状壳体3内的多个单体电池(图中未示出)以及与筒状壳体3相连接的如上述实施例所描述的封板。本实施例的筒状壳体3具有沿自身轴向相对的两端。筒状壳体3的轴向与厚度方向X相同。各个端部设置有开口。封板用于盖闭筒状壳体3的开口，并与筒状壳体3密封连接，以封装筒状壳体3内部的单体电池。
本实施例的电池模组包括两个封板。两个封板设置于筒状壳体3的两个开口。主体部1的第二表面12朝向单体电池。主体部1与筒状壳体3密封连接、以封装多个单体电池。
本实施例的筒状壳体3具有靠近主体部1的底面14的底板(图中未示出)。连接柱2的伸出部21越过筒状壳体3的底板的外表面，从而在高度 方向Y上凸出于底板的外表面。这样，在将本实施例的多个电池模组与箱体4进行成组操作时，如图4所示，各个电池模组通过自身的连接柱2与箱体4连接固定，同时各个电池模组的筒状壳体3与箱体4的底板不发生接触，而是保持预定间隙，避免筒状壳体3上与凸起相对的区域出现应力集中情况，有利于提高电池模组的位置稳定性，也间接地降低了对箱体4加工制造难度要求。
在一个实施例中，底板的外表面和伸出部21的端面21a均为平面，端面21a与外表面相互平行。电池模组连接固定于箱体4时，伸出部21的端面21a与箱体4的底板相接触，底板的外表面与箱体4之间保持预定间隙。伸出部21的端面21a与底板的外表面之间的距离为定值，易于根据产品要求，灵活调整伸出部21的端面21a与底板的外表面之间的距离即可。在一个示例中，筒状壳体3的横截面为矩形环状结构。本实施例的筒状壳体3整体为直筒结构，其具有靠近主体部1的底面14的底板、靠近主体部1的顶面13的顶板31以及两个侧板32。封板的主体部1为矩形结构、且与筒状壳体3的截面形状相匹配，两者的宽度和高度相同。底板的外表面为与高度方向Y相垂直的平面，伸出部21的端面21a也为与高度方向Y相垂直的平面，从而有利于伸出部21平稳地水平放置于箱体4上，有利于提升电池模组的稳定性。
虽然已经参考优选实施例对本实用新型进行了描述，但在不脱离本实用新型的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本实用新型并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (10)

  1. 一种用于电池模组的封板，其特征在于，包括：
    主体部，呈板状，所述主体部包括第一表面、第二表面、顶面和底面，所述第一表面和第二表面在所述主体部自身厚度方向上相对、且所述第二表面用于朝向所述电池模组的单体电池设置，所述顶面和底面在所述主体部自身高度方向上相对；
    连接柱，所述连接柱设置于所述第一表面、且沿所述高度方向延伸，所述连接柱靠近所述底面的一端延伸越过所述底面以形成伸出部。
  2. 根据权利要求1所述的封板，其特征在于，所述伸出部具有与所述底面平行的端面。
  3. 根据权利要求1所述的封板，其特征在于，所述连接柱为筒状结构体。
  4. 根据权利要求1所述的封板，其特征在于，所述连接柱与所述主体部为一体成型结构。
  5. 根据权利要求1所述的封板，其特征在于，所述连接柱与所述主体部焊接连接。
  6. 根据权利要求1所述的封板，其特征在于，所述连接柱的数量为两个，两个所述连接柱在宽度方向上间隔设置。
  7. 根据权利要求6所述的封板，其特征在于，两个所述连接柱各自具有的所述伸出部的端面为平面、且彼此共面。
  8. 根据权利要求1至7任一项所述的封板，其特征在于，所述伸出部越过所述主体部的所述底面的长度为0.5毫米至1.5毫米。
  9. 一种电池模组，其特征在于，包括：
    筒状壳体，相对的两端设置开口；
    单体电池，多个所述单体电池设置于所述筒状壳体内；
    两个如权利要求1至8任一项所述的封板，两个所述封板设置于所述筒状壳体的两个所述开口，所述主体部的所述第二表面朝向所述单体电池，所述主体部与所述筒状壳体密封连接、以封装多个所述单体电池；
    其中，所述筒状壳体具有靠近所述底面的底板，所述伸出部越过所述筒状壳体的所述底板的外表面。
  10. 根据权利要求9所述的电池模组，其特征在于，所述外表面和所述伸出部的端面均为平面，所述端面与所述外表面相互平行。
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CN107732063A (zh) * 2017-09-29 2018-02-23 江苏银基烯碳能源科技有限公司 一种可拆卸电池模组
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