WO2019148644A1 - 用于电池模组的壳体及电池模组 - Google Patents

用于电池模组的壳体及电池模组 Download PDF

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Publication number
WO2019148644A1
WO2019148644A1 PCT/CN2018/081974 CN2018081974W WO2019148644A1 WO 2019148644 A1 WO2019148644 A1 WO 2019148644A1 CN 2018081974 W CN2018081974 W CN 2018081974W WO 2019148644 A1 WO2019148644 A1 WO 2019148644A1
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Prior art keywords
edge
welding
weld
receiving
section
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PCT/CN2018/081974
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English (en)
French (fr)
Inventor
王志超
章华
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宁德时代新能源科技股份有限公司
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Publication of WO2019148644A1 publication Critical patent/WO2019148644A1/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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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 welding of a casing, in particular to a casing and a battery module for a battery module.
  • rechargeable lithium-ion battery modules as power sources, such as mobile phones, notebook computers, power tools, electric vehicles and so on.
  • the positive and negative electrodes, the electrolyte and the separator of the battery unit of the lithium ion battery module are collectively packaged in the casing, and the casing is sealed by the sealing plate.
  • the housing is completed by laser welding.
  • Laser welding uses the focus of the laser beam to scan the area where the metal to be welded is in contact, and the high temperature causes the metal to be melted together.
  • the weld S at the welded joint is formed by two parallel planes.
  • the laser beam is directed to the inside of the casing through the weld seam S, and the diaphragm or the pole piece of the battery unit inside the casing is often broken due to the welding precision and the positioning error of the fixture, which causes the internal short circuit or micro short circuit of the battery.
  • Another object of an embodiment of the present invention is to provide a battery module capable of reducing damage caused by a laser beam to a battery unit during laser welding.
  • an embodiment of the present invention provides a housing for a battery module, the housing including a body, a first edge and a second edge at opposite ends of the body, the first edge and the second edge are both One direction extending and connected to form a receiving cavity; the first edge is formed with a welded portion extending from the body toward the second edge; the second edge is provided with a receiving portion for receiving the welded portion, the welded portion and the receiving portion are fitted to each other to A weld bead is formed; wherein the receiving portion has a welding surface, and a portion of the welding surface adjacent to the receiving cavity can block light passing through the weld bead.
  • the first edge further includes a recess connected to the welded portion, the cross section of the recess and the welded portion in the first direction is a first stepped shape; and the second edge further includes a connection with the receiving portion
  • the protrusion, the cross section of the protrusion and the receiving portion in the first direction is a second step shape, and the first step shape and the second step shape can be fitted to each other.
  • a cross section of the welded portion in the first direction is a square shape, and a thickness dimension of the square is smaller than a wall thickness of the first edge, and the receiving portion is formed with two extending in the first direction and intersecting each other
  • the welding surface one of which forms a weld between the welded surface and the welded portion, and the other welded surface blocks the light passing through the welded joint.
  • the cross section of the welded portion in the first direction is a right-angled triangle, the oblique side of the right-angled triangle faces the second edge and is inclined upward from the direction in which the receiving cavity is outside the housing; the welding of the receiving portion The face is a plane parallel to the hypotenuse of the right triangle.
  • the welded portion is a protrusion formed by the body extending toward the second edge, and at least a portion of the cross section of the protrusion in the first direction decreases in a direction toward the second edge; the receiving portion To accommodate the slot, the shape of the receiving slot matches the shape of the projection.
  • the protrusion has a triangular cross section in the first direction, and the corresponding receiving groove is a triangular groove; the receiving portion is formed with two welding faces extending in the first direction and intersecting, wherein A weld bead is formed between one weld face and the weld, and the other weld face is capable of blocking light passing through the weld.
  • the protrusion has a trapezoidal cross section in the first direction, and the corresponding receiving groove is a trapezoidal groove; the receiving portion is formed with two corresponding welding faces extending in the first direction, two The welding faces are disposed parallel to the short base and the bevel of the trapezoid, respectively, wherein a weld bead is formed between the weld face parallel to the short base and the weld, and the weld face parallel to the bevel can block the light passing through the weld.
  • the cross section of the protrusion in the first direction is arcuate
  • the chord length of the bow is equal to the wall thickness of the first edge
  • the corresponding receiving groove is an arcuate groove
  • the housing is bent into a cylindrical metal case by a sheet metal member.
  • an embodiment of the present invention further provides a battery module including a housing, a cover, and a battery unit disposed in an enclosed space surrounded by the housing and the cover, wherein the housing is as described above. case.
  • the housing provided by the embodiment of the present invention provides a welding portion and a receiving portion that are mutually fitted on the opposite first and second edges, so that at least a part of the welding surface of the receiving portion can block the laser beam from the weld Through the transmission, the problem of easy light leakage during butt welding is avoided, and the metal strip of the gasket during butt welding can be omitted, the appearance is beautiful, and the material cost is reduced.
  • FIG. 1 is a schematic structural view of a housing provided in the prior art
  • FIG. 2 is a schematic structural view of a housing according to an embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of the first welded portion of the casing shown in Figure 2;
  • Figure 4 is a schematic structural view of a second welded portion of the housing shown in Figure 2;
  • Figure 5 is a schematic structural view of a third welded portion of the housing shown in Figure 2;
  • Figure 6 is a schematic structural view of a fourth welding portion of the housing shown in Figure 2;
  • Figure 7 is a schematic structural view of a fifth welding portion of the housing shown in Figure 2;
  • FIG. 8 is a schematic structural diagram of a battery module according to an embodiment of the present invention.
  • an embodiment of the present invention provides a housing for a battery module, including a body 1, a first edge 10 and a second edge 20 at opposite ends of the body 1, a first edge 10 and a second edge. 20 are each extending in the first direction D and joined to form a receiving cavity C; the first edge 10 is formed with a weld 11 extending from the body 1 towards the second edge 20; the second edge 20 is provided with a receiving accommodating portion 11 The portion 21, the welded portion 11 and the receiving portion 21 are fitted to each other to form a welded seam S; wherein the receiving portion 21 has a welding surface, and a portion of the welded surface close to the receiving cavity C can block light passing through the welded seam S, thereby preventing The laser beam is transmitted through the weld S, which avoids the problem of easy light leakage during butt welding.
  • the first edge 10 further includes a recess 12 connected to the welded portion 11 , the cross section of the recess 12 and the welded portion 11 in the first direction D is a first step shape; the second edge 20 further The convex portion 22 connected to the accommodating portion 21 is included, and the cross section of the convex portion 22 and the accommodating portion 21 in the first direction D is a second step shape, and the first step shape and the second step shape can be fitted to each other.
  • the cross section of the welded portion 11 in the first direction D is a square 111, and the thickness of the square 111 is smaller than the wall thickness of the first edge 10, and the receiving portion 21 is formed with two extending in the first direction D and intersecting each other.
  • the welding faces 211a, 211b, one of the welding faces 211a and the welded portion 11 form a weld S, and the other welded face 211b can block the light passing through the weld S, as shown in FIG.
  • the cross section of the welded portion 11 in the first direction D is a right-angled triangle 112, and the oblique side of the right-angled triangle 112 faces the second edge 20 and is inclined upward from the direction in which the cavity C is accommodated to the outside of the casing.
  • the welding face 212 of the receiving portion 21 is a plane parallel to the oblique side of the right triangle 112.
  • a weld bead S is formed between the portion of the weld surface 212 away from the receiving cavity and the welded portion 11, and the portion of the welded surface 212 adjacent to the receiving cavity C can block the light passing through the weld bead S, as shown in FIG.
  • the welded portion 11 is a protrusion formed by the body 1 extending toward the second edge 20, and at least one section of the cross section of the protrusion in the first direction D is in a direction toward the second edge 20.
  • the receiving portion 21 is a receiving groove, and the shape of the receiving groove matches the shape of the protruding portion.
  • the cross section of the protrusion in the first direction D is a triangle 113, and the corresponding receiving groove is a triangular groove 213; the receiving portion 21 is formed with two welding faces 213a, 213b extending in the first direction and intersecting, wherein A weld S is formed between one weld surface 213a and the welded portion 11, and the other weld surface 213b is capable of blocking light passing through the weld S, as shown in FIG.
  • the triangle 113 may be any one of an acute triangle, an obtuse triangle, or a right triangle.
  • the cross section of the protrusion in the first direction is a trapezoid 114, and the corresponding receiving groove is a trapezoidal groove 214; the receiving portion 21 is formed with a corresponding at least two welding faces 214a, 214b extending in the first direction, wherein A weld bead S is formed between one of the weld faces 214a and the weld portion 11, and the other weld face 214b is capable of blocking the light passing through the weld bead S.
  • the trapezoid 114 is a right-angled trapezoid
  • the two weld faces 214a, 214b are parallel to the bottom and bevel of the trapezoid 114, respectively, as shown in FIG. If it is a normal trapezoid, there are three weld faces.
  • the cross section of the protrusion in the first direction has an arcuate shape 115, the chord length of the arcuate 115 is equal to the wall thickness of the first edge 10, and the corresponding receiving groove is an arcuate groove 215, and the inner surface of the arcuate groove 215 is a welded surface. , as shown in Figure 7.
  • the housing is bent into a cylindrical metal housing by a sheet metal member.
  • At least a part of the welding surface of the accommodating portion 21 can block the laser beam from the weld seam by respectively providing the welded portion 11 and the accommodating portion 21 which are mutually fitted on the oppositely disposed first edge 10 and second edge 20 .
  • an embodiment of the present invention further provides a battery module including a housing 100 , a cover 200 , and a battery unit 300 disposed in an enclosed space surrounded by the housing 100 and the cover 200 .
  • a battery module including a housing 100 , a cover 200 , and a battery unit 300 disposed in an enclosed space surrounded by the housing 100 and the cover 200 . It is a cylindrical casing which is bent by a sheet metal member as described above.
  • the outer casing 100 of the battery module provided by the embodiment of the present invention adopts the casing as described above, which can effectively reduce the damage caused by the laser beam to the battery unit 300 during the laser welding process, and improve the reliability of the battery module.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本实用新型涉及一种用于电池模组的壳体及电池模组，所述壳体包括本体、位于本体相对的两端的第一边缘和第二边缘，第一边缘和第二边缘均沿第一方向延伸且相连接以形成容纳空腔；第一边缘形成有由本体朝向第二边缘延伸的焊接部；第二边缘设置有容纳焊接部的容纳部，焊接部与容纳部相互嵌合设置以形成焊缝；其中，容纳部具有焊接面，焊接面的靠近容纳空腔的部分能够遮挡经由焊缝的光线。本实用新型通过在相对设置的第一边缘和第二边缘上分别设置相互嵌合的焊接部和容纳部，使得容纳部的至少一部分焊接面能够阻挡激光束从焊缝中透过，避免了对接焊接时容易漏光的问题，同时还可以省去对接焊接时衬垫的金属条，外型美观，降低了材料成本。

Description

用于电池模组的壳体及电池模组 技术领域
本实用新型涉及壳体的焊接技术领域，特别是涉及一种用于电池模组的壳体及电池模组。
背景技术
随着环保意识的增强和低碳经济的方兴未艾，越来越多的设备选择以可充放电的锂离子电池模组作为电源，如手机、笔记本电脑、电动工具、电动汽车等等。锂离子电池模组的电池单元的正负极片、电解质、隔膜共同封装于壳体内，并通过封口板将壳体封口。
一般来说，壳体通过激光焊接加工完成。激光焊接是利用激光束的焦点扫描待焊金属相接触的区域，高温使金属熔融连接在一起。参阅图1，焊接接头处的焊缝S由两个平行平面形成。焊接时，激光束通过焊缝S指向壳体内部，经常会因为加工精度及工装夹具定位问题导致焊接漏光而击穿壳体内部电池单元的隔膜或极片，造成电池内部短路或微短路。即使采用具有一定倾斜角的激光束对其进行焊接，焊接接触线的断面同样会将部分激光束反射至壳体内部，使电池单元受损。
为了避免激光焊接对壳体内部的电池单元造成伤害，需要在焊缝下衬垫一层金属条L。但是，增加零部件会影响装配效率，也增加了材料成本。
实用新型内容
本实用新型实施例的一个目的是提供一种壳体，其能够有效避免焊接时的漏光问题。
本实用新型实施例的另一个目的是提供一种电池模组，其能够降低激光焊接过程中激光束对电池单元所造成的伤害。
一方面，本实用新型实施例提出了一种用于电池模组的壳体，壳体包括本体、位于本体相对的两端的第一边缘和第二边缘，第一边缘和第二边缘均沿第一方向延伸且相连接以形成容纳空腔；第一边缘形成有由本体朝向第二边缘延伸的焊接部；第二边缘设置有容纳焊接部的容纳部，焊接部与容纳部相互嵌合设置以形成焊缝；其中，容纳部具有焊接面，焊接面的靠近容纳空腔的部分能够遮挡经由焊缝的光线。
根据本实用新型实施例的一个方面，第一边缘进一步包括与焊接部相连的凹部，凹部与焊接部在第一方向上的横截面呈第一阶梯形；第二边缘进一步包括与容纳部相连的凸部，凸部与容纳部在第一方向上的横截面呈第二阶梯形，且第一阶梯形与第二阶梯形能够相互嵌合。
根据本实用新型实施例的一个方面，焊接部在第一方向上的横截面为方形，且方形的厚度尺寸小于第一边缘的壁厚，容纳部形成有沿第一方向延伸且相交的两个焊接面，其中一个焊接面与焊接部之间形成焊缝，另一个焊接面能够遮挡经由焊缝的光线。
根据本实用新型实施例的一个方面，焊接部在第一方向上的横截面为直角三角形，直角三角形的斜边朝向第二边缘且由容纳空腔至壳体外的方向向上倾斜；容纳部的焊接面为平行于直角三角形的斜边的平面。
根据本实用新型实施例的一个方面，焊接部为由本体朝向第二边缘延伸形成的突出部，突出部在第一方向上的横截面的至少一段在朝向第二边缘的方向上递减；容纳部为容纳槽，容纳槽的形状与突出部的形状相匹配。
根据本实用新型实施例的一个方面，突出部在第一方向上的横截面呈三角形，相应的容纳槽为三角槽；容纳部形成有沿第一方向延伸且相交的两个焊接面，其中，一个焊接面与焊接部之间形成焊缝，另一个焊接面能够遮挡经由焊缝的光线。
根据本实用新型实施例的一个方面，突出部在第一方向上的横截面呈梯形，相应的容纳槽为梯形槽；容纳部形成有沿第一方向延伸的相应的两个焊接面，两个焊接面设置为分别平行于梯形的短底边和斜边，其中，平行于短底边的焊接面与焊接部之间形成焊缝，平行于斜边的焊接面能够遮 挡经由焊缝的光线。
根据本实用新型实施例的一个方面，突出部在第一方向上的横截面呈弓形，弓形的弦长等于第一边缘的壁厚，相应的容纳槽为弓形槽。
根据本实用新型实施例的一个方面，壳体由钣金件折弯而呈筒状的金属壳体。
另一方面，本实用新型实施例还提出了一种电池模组，包括外壳、盖板，以及设置于由外壳与盖板围成的封闭空间内的电池单元，其中，外壳为如上所述的壳体。
本实用新型实施例提供的壳体，通过在相对设置的第一边缘和第二边缘上分别设置相互嵌合的焊接部和容纳部，使得容纳部的至少一部分焊接面能够阻挡激光束从焊缝中透过，避免了对接焊接时容易漏光的问题，同时还可以省去对接焊接时衬垫的金属条，外型美观，降低了材料成本。
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是现有技术中提供的壳体的结构示意图；
图2是本实用新型实施例提供的一种壳体的结构示意图；
图3是图2所示的壳体的第一种焊接部的结构示意图；
图4是图2所示的壳体的第二种焊接部的结构示意图；
图5是图2所示的壳体的第三种焊接部的结构示意图；
图6是图2所示的壳体的第四种焊接部的结构示意图；
图7是图2所示的壳体的第五种焊接部的结构示意图；
图8是本实用新型实施例提供的一种电池模组的结构示意图。
其中：
1-本体；10-第一边缘；11-焊接部；12-凹部；20-第二边缘；21-容纳部；22-凸部；S-焊缝；C-容纳空腔；D-第一方向；
111-方形；112-直角三角形；113-三角形；114-梯形；115-弓形；213-三角槽；214-梯形槽；215-弓形槽；211a，211b，212，213a，213b， 214a，214b，215-焊接面；
100-外壳；200-盖板；300-电池单元。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例绘制。
具体实施方式
下面将详细描述本实用新型的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本实用新型的全面理解。但是，对于本领域技术人员来说很明显的是，本实用新型可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本实用新型的示例来提供对本实用新型的更好的理解。在附图和下面的描述中，至少部分的公知结构和技术没有被示出，以便避免对本实用新型造成不必要的模糊；并且，为了清晰，可能夸大了部分结构的尺寸。此外，下文中所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。
下述描述中出现的方位词均为图中示出的方向，并不是对本实用新型的用于电池模组的壳体及电池模组的具体结构进行限定。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”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸式连接，或一体地连接；可以是直接相连，也可以间接相连。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2至图8对本实用新型实施例的用于电池模组的壳体及电池模组进行详细描述。
参阅图2，本实用新型实施例提供一种用于电池模组的壳体，包括本体1、位于本体1相对的两端的第一边缘10和第二边缘20，第一边缘10和第二边缘20均沿第一方向D延伸且相连接以形成容纳空腔C；第一边缘10形成有由本体1朝向第二边缘20延伸的焊接部11；第二边缘20设置有容纳焊接部11的容纳部21，焊接部11与容纳部21相互嵌合设置以 形成焊缝S；其中，容纳部21具有焊接面，焊接面的靠近容纳空腔C的部分能够遮挡经由焊缝S的光线，从而防止激光束从焊缝S中透过，避免了对接焊接时容易漏光的问题。
下面结合附图图3至图7进一步详细描述用于电池模组的壳体的具体结构。
作为一种可选的实施方式，第一边缘10进一步包括与焊接部11相连的凹部12，凹部12与焊接部11在第一方向D上的横截面呈第一阶梯形；第二边缘20进一步包括与容纳部21相连的凸部22，凸部22与容纳部21在第一方向D上的横截面呈第二阶梯形，且第一阶梯形与第二阶梯形能够相互嵌合。
具体地，焊接部11在第一方向D上的横截面为方形111，且方形111的厚度尺寸小于第一边缘10的壁厚，容纳部21形成有沿第一方向D延伸且相交的两个焊接面211a，211b，其中一个焊接面211a与焊接部11之间形成焊缝S，另一个焊接面211b能够遮挡经由焊缝S的光线，如图3所示。
作为一种可选的实施方式，焊接部11在第一方向D上的横截面为直角三角形112，直角三角形112的斜边朝向第二边缘20且由容纳空腔C至壳体外的方向向上倾斜；容纳部21的焊接面212为平行于直角三角形112的斜边的平面。焊接面212远离容纳空腔的部分与焊接部11之间形成有焊缝S，焊接面212靠近容纳空腔C的部分能够遮挡经由焊缝S的光线，如图4所示。
作为一种可选的实施方式，焊接部11为由本体1朝向第二边缘20延伸形成的突出部，突出部在第一方向D上的横截面的至少一段在朝向第二边缘20的方向上递减；容纳部21为容纳槽，容纳槽的形状与突出部的形状相匹配。
具体地，突出部在第一方向D上的横截面呈三角形113，相应的容纳槽为三角槽213；容纳部21形成有沿第一方向延伸且相交的两个焊接面213a，213b，其中，一个焊接面213a与焊接部11之间形成焊缝S，另一个焊接面213b能够遮挡经由焊缝S的光线，如图5所示。三角形113可以 为锐角三角形、钝角三角形或者直角三角形中的任意一种。
进一步地，突出部在第一方向上的横截面呈梯形114，相应的容纳槽为梯形槽214；容纳部21形成有沿第一方向延伸的相应的至少两个焊接面214a，214b，其中，一个焊接面214a与焊接部11之间形成焊缝S，另一个焊接面214b能够遮挡经由焊缝S的光线。如果梯形114为直角梯形，则两个焊接面214a，214b分别平行于梯形114的底边和斜边，如图6所示。如果为普通梯形，则焊接面有三个。
进一步地，突出部在第一方向上的横截面呈弓形115，弓形115的弦长等于第一边缘10的壁厚，相应的容纳槽为弓形槽215，弓形槽215的内表面即为焊接面，如图7所示。
作为一种可选的实施方式，壳体由钣金件折弯而呈筒状的金属壳体。
本实用新型实施例通过在相对设置的第一边缘10和第二边缘20上分别设置相互嵌合的焊接部11和容纳部21，使得容纳部21的至少一部分焊接面能够阻挡激光束从焊缝中透过，避免了对接焊接时容易漏光的问题，同时还可以省去对接焊接时衬垫的金属条，外型美观，降低了材料成本
参阅图8，本实用新型实施例还提供了一种电池模组，其包括外壳100、盖板200，以及设置于由外壳100与盖板200围成的封闭空间内的电池单元300，外壳100为如前所述的由钣金件折弯而呈筒状的壳体。
本实用新型实施例提供的电池模组的外壳100采用如前所述的壳体，能够有效降低激光焊接过程中激光束对电池单元300所造成的伤害，提高了电池模组的可靠性。
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壳体，其特征在于，所述壳体包括本体(1)、位于所述本体(1)相对的两端的第一边缘(10)和第二边缘(20)，所述第一边缘(10)和所述第二边缘(20)均沿第一方向(D)延伸且相连接以形成容纳空腔(C)；
    所述第一边缘(10)形成有由所述本体(1)朝向所述第二边缘(20)延伸的焊接部(11)；所述第二边缘(20)设置有容纳所述焊接部(11)的容纳部(21)，所述焊接部(11)与所述容纳部(21)相互嵌合设置以形成焊缝(S)；
    其中，所述容纳部(21)具有焊接面，所述焊接面的靠近所述容纳空腔(C)的部分能够遮挡经由所述焊缝(S)的光线。
  2. 根据权利要求1所述的壳体，其特征在于，所述第一边缘(10)进一步包括与所述焊接部(11)相连的凹部(12)，所述凹部(12)与所述焊接部(11)在所述第一方向(D)上的横截面呈第一阶梯形；
    所述第二边缘(20)进一步包括与所述容纳部(21)相连的凸部(22)，所述凸部(22)与所述容纳部(21)在所述第一方向(D)上的横截面呈第二阶梯形，且所述第一阶梯形与所述第二阶梯形能够相互嵌合。
  3. 根据权利要求2所述的壳体，其特征在于，所述焊接部(11)在所述第一方向(D)上的横截面为方形(111)，且所述方形(111)的厚度尺寸小于所述第一边缘(10)的壁厚，所述容纳部(21)形成有沿所述第一方向(D)延伸且相交的两个焊接面(211a，211b)，其中一个所述焊接面(211a)与所述焊接部(11)之间形成所述焊缝(S)，另一个所述焊接面(211b)能够遮挡经由所述焊缝(S)的光线。
  4. 根据权利要求1所述的壳体，其特征在于，所述焊接部(11)在所述第一方向(D)上的横截面为直角三角形(112)，所述直角三角形(112)的斜边朝向所述第二边缘(20)且由所述容纳空腔(C)至所述壳 体外的方向向上倾斜；
    所述容纳部(21)的所述焊接面(212)为平行于所述直角三角形(112)的斜边的平面。
  5. 根据权利要求1所述的壳体，其特征在于，所述焊接部(11)为由所述本体(1)朝向所述第二边缘(20)延伸形成的突出部，所述突出部在所述第一方向(D)上的横截面的至少一段在朝向所述第二边缘(20)的方向上递减；
    所述容纳部(21)为容纳槽，所述容纳槽的形状与所述突出部的形状相匹配。
  6. 根据权利要求5所述的壳体，其特征在于，所述突出部在所述第一方向(D)上的横截面呈三角形(113)，相应的所述容纳槽为三角槽(213)；
    所述容纳部(21)形成有沿所述第一方向(D)延伸的相应的两个焊接面(213a，213b)，其中，一个所述焊接面(213a)与所述焊接部(11)之间形成所述焊缝(S)，另一个所述焊接面(213b)能够遮挡经由所述焊缝(S)的光线。
  7. 根据权利要求5所述的壳体，其特征在于，所述突出部在所述第一方向(D)上的横截面呈梯形(114)，相应的所述容纳槽为梯形槽(214)；所述容纳部(21)形成有沿所述第一方向(D)延伸且相交的两个焊接面(214a，214b)，所述两个焊接面(214a，214b)设置为分别平行于所述梯形(114)的短底边和斜边，其中，平行于所述短底边的所述焊接面(214a)与所述焊接部(11)之间形成所述焊缝(S)，平行于所述斜边的所述焊接面(214b)能够遮挡经由所述焊缝(S)的光线。
  8. 根据权利要求5所述的壳体，其特征在于，所述突出部在所述第一方向(D)上的横截面呈弓形(115)，所述弓形(115)的弦长等于所述第一边缘(10)的壁厚，相应的所述容纳槽为弓形槽(215)。
  9. 根据权利要求1至8任一项所述的壳体，其特征在于，所述壳体 由钣金件折弯而呈筒状的金属壳体。
  10. 一种电池模组，包括外壳(100)、盖板(200)，以及设置于由所述外壳(100)与所述盖板(200)围成的封闭空间内的电池单元(3)，其特征在于，所述外壳(100)为如权利要求1至9任一项所述的壳体。
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CN215496865U (zh) * 2021-05-26 2022-01-11 惠州亿纬锂能股份有限公司 电池外壳和锂电池
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