WO2019010911A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2019010911A1
WO2019010911A1 PCT/CN2017/115065 CN2017115065W WO2019010911A1 WO 2019010911 A1 WO2019010911 A1 WO 2019010911A1 CN 2017115065 W CN2017115065 W CN 2017115065W WO 2019010911 A1 WO2019010911 A1 WO 2019010911A1
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WO
WIPO (PCT)
Prior art keywords
side wall
battery module
lower casing
battery
groove
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/CN2017/115065
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English (en)
French (fr)
Inventor
刘国峰
朱涛声
赵宾
秦峰
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
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Publication of WO2019010911A1 publication Critical patent/WO2019010911A1/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
    • 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
    • H01M50/218—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
    • 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 invention belongs to the field of batteries, and more particularly to a battery module.
  • the housing of the conventional battery module is usually an end plate and a side plate welded structure.
  • the end plate and the battery assembly unit are first clamped by the clamp and then fixed to the side plate.
  • This assembly method is inefficient and requires welding. High, not conducive to industrial production.
  • the battery is directly mounted in the housing of the closed battery module having an opening at the top, and then sealed by the top cover, which can improve the assembly efficiency to a certain extent, but the structure is
  • the battery module is assembled, since the housing of the battery module has no space for placing the fixture, the battery can only be inserted into the housing by using a gap, which requires that the size deviation of the housing must be the cumulative error of the battery size.
  • the limit is positively biased and then the potting process is used to fill the gap between the battery and the housing.
  • this structure increases the size of the battery module, and the amount of glue is large, which leads to an increase in the weight of the battery module, which causes a great density and energy density of the battery module. Big loss.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a battery module that is small in size, light in weight, fast in assembly efficiency, and high in energy density.
  • the present invention provides a battery module comprising:
  • a lower casing having a cavity structure having an opening at the top, a first side wall of the lower casing, and a second side wall provided at both sides;
  • a battery assembly comprising a plurality of single cells and housed in a lower casing
  • the first sidewall is provided with a groove on a side close to the battery assembly, and the groove extends downward from the opening of the lower casing.
  • a boss is disposed on a side of the first side wall away from the battery assembly, and the boss is disposed corresponding to the groove.
  • the first side wall is provided with an end plate fixedly connected to the lower casing, and the end plate is provided with a recessed portion, and the boss on the first side wall is received at the end Inside the recess of the plate.
  • the end plate is provided with a lightening hole.
  • the first side wall is provided with a lightening hole.
  • the groove on the first side wall is trapezoidal, semi-circular or rectangular.
  • the height of the groove on the first side wall is not less than half the height of the first side wall.
  • two sides or a plurality of spaced grooves are respectively disposed on one side of the first side wall adjacent to the battery assembly.
  • the recess on the first side wall is configured to receive a clamp for holding the battery assembly.
  • the groove on the first side wall is filled with potting glue after the battery assembly is received in the lower case.
  • the battery module of the present invention has the following technical effects:
  • the first side wall of the two ends of the lower casing is provided with a groove for facilitating the assembly of the battery assembly, thereby improving the assembly efficiency of the battery module;
  • FIG. 1 is an exploded perspective view showing the structure of a battery module according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of a battery module according to Embodiment 1 of the present invention.
  • FIG. 3 is a top plan view showing the structure of a lower casing of a battery module according to Embodiment 1 of the present invention.
  • Figure 4 is an enlarged schematic view of the circled portion of Figure 3.
  • FIG. 5 is a schematic structural view of an end plate of a battery module according to Embodiment 1 of the present invention.
  • FIG. 6 is a top plan view of a battery module end plate according to Embodiment 1 of the present invention.
  • FIG. 7 is an exploded perspective view showing the structure of a battery module according to Embodiment 2 of the present invention.
  • Figure 8 is a plan view showing the structure of a lower casing of a battery module according to Embodiment 2 of the present invention.
  • Figure 9 is an enlarged schematic view of the circled portion of Figure 8.
  • FIG. 10 is a schematic view showing the assembly process of the battery module of the present invention.
  • 10-lower housing 15-first side wall; 150-groove; 152-land; 154-weight-reducing hole; 16-second side wall;
  • the battery module of the present invention includes:
  • the lower casing 10 is a cavity structure having an opening at the top, and the first casing 15 is provided at both ends of the lower casing 10, and the second side wall 16 is disposed at both sides;
  • the battery assembly 20 includes a plurality of unit cells 200 and is housed in the lower casing 10;
  • the first sidewall 10 is provided with a groove 150 on a side close to the battery assembly 20, and the groove 150 extends downward from the opening of the lower casing 10.
  • the first side wall 15 is disposed at two ends of the lower casing 10
  • the second side wall 16 is disposed on both sides, and the first side wall 15 and the second side wall 16 have the same thickness.
  • the first side wall 15 of the two ends of the lower casing 10 is respectively provided with two grooves 150 on the side close to the battery assembly 20, and the grooves 150 on the first side walls 15 of the two ends are correspondingly positioned, and the groove 150 is from the lower case.
  • the open end of the body 10 extends downwardly and opens into the interior of the first side wall 15.
  • a notch is formed in the first side wall 15.
  • the groove 150 has a trapezoidal shape, a semicircular shape or a rectangular shape, in the illustrated embodiment.
  • the groove 150 is trapezoidal.
  • the first side wall 15 where the groove 150 is located is disposed on a side away from the battery assembly 20 with a boss 152.
  • the boss 152 is disposed corresponding to the groove 150.
  • the shape of the boss 152 is the same as or similar to that of the groove 150.
  • the thickness of the stage 152 coincides with the thickness of the first side wall 15. Since the boss 152 and the groove 150 are disposed correspondingly, the number of the bosses 152 corresponds to the number of the grooves 150.
  • the boss 152 extends from the top end to the bottom of the lower side of the lower casing 10 along the first side wall 15 to facilitate dispersion of stress on the first side wall 15.
  • the height of the groove 150 is not less than half of the height of the first side wall 15, and the groove 150 is disposed to receive the jig for holding the battery assembly 20, when the clamping arm clamps the battery assembly 20 into the lower casing 10,
  • the clamping arm can be inserted into the recess 150 to ensure that the battery assembly 20 does not loosen during the process of being housed in the lower casing 10, and the battery assembly 20 can be smoothly loaded into the lower casing 10.
  • the height of the recess 150 coincides with the height of the first side wall 15 from the top of the first side wall 15 to the bottom.
  • the material of the lower casing 10 is aluminum or a polymer material, and is integrally cast into a unitary structure. When the battery module is assembled, the lower casing 10 having an integral structure can improve the assembly efficiency of the battery module.
  • the material of the lower casing 10 is aluminum, it is made by a stretching process, and the drawing die should be designed with a boss to ensure that the groove 150 of the lower casing 10 can be stretched and formed; when the material of the lower casing 10 is high Molecular materials are made by processes such as injection molding or blow molding.
  • the battery assembly 20 includes a plurality of unit cells 200, and the plurality of unit cells 200 are clamped by the clamping arms for quick assembly.
  • the housing of the unit cell 200 is an aluminum case or a plastic case, preferably a polypropylene plastic case.
  • a polypropylene plastic case By using a polypropylene plastic case, the weight of the unit cell 200 can be greatly reduced, and the energy density of the battery module can be improved.
  • an outer end of the first side wall 15 of the lower casing 10 is further provided with an end plate 30 , and the end plate 30 is provided with
  • the two trapezoidal recesses 300 may be semi-circular or rectangular in shape, and are mainly adjusted according to the shape of the boss 152 on the lower casing 10.
  • the position of the recess 300 corresponds to the position of the boss 152 on the lower casing 10.
  • the boss 152 is housed in the recess 300.
  • the end plate 30 is mainly used to block the deformation of the lower casing 10. Since the wall thickness of the first side wall 15 and the second side wall 16 of the lower casing 10 is relatively thin, the first side wall 15 is also provided with a battery for easy loading. The groove 150 of the assembly 20, during use, the expansion of the battery assembly 20 tends to cause the lower casing 10 to be deformed. By additionally adding the end plate 30 to the outside of the first side wall 15, the thickness of the end plate 30 is greater than The wall thickness of one side wall 15 and the second side wall 16 can hinder the occurrence of deformation and improve the structural strength of the battery module.
  • the end plate 30 is further provided with a weight reducing hole 304. Under the premise of ensuring the structural strength of the end plate 30, the weight of the end plate 30 can be reduced, thereby increasing the energy density of the battery module.
  • the end plate 30 is made of aluminum or polymer material. When the material is made of aluminum, it is extruded; when the material is made of polymer, it is injection molded. When the fixed connection is made, the material of the end plate 30 is the same as the material of the lower casing 10, and the end plate 30 and the lower casing 10 are integrally welded by a welding process before the battery assembly 20 is housed.
  • FIG. 7 to 9 are schematic views of a second embodiment of a battery module according to the present invention.
  • the structure of the battery module of the present invention is substantially the same as that of the first embodiment.
  • the thickness of the first side wall 15 at both ends of the lower casing 10 is greater than the thickness of the second side wall 16 on both sides of the lower casing 10 even if the battery assembly 20 expands during use because of the first side wall 15
  • the thickness is relatively thick, and deformation of the lower casing 10 can also be prevented.
  • a plurality of weight reducing holes 154 are further disposed on the first side wall 15 of the lower casing 10.
  • the assembly process of the battery module is as follows: Referring to FIG. 10, the unit cells 200 are assembled into the battery assembly 20 on the jig before being placed in the lower casing 10. After the clamp presses to clamp the plurality of unit cells 200 to meet the required module length and clamping force, the clamp clamps the battery assembly 20, and then the clamp arms of the clamp are loaded into the lower shell along with the battery assembly 20.
  • the body 10 wherein the clamping arm enters the lower casing 10 along the groove 150 at both ends of the lower casing 10, and when the bottom of the battery assembly 20 is in contact with the bottom of the lower casing 10, the clamping arm releases the clamping force, and the lower casing
  • the first side wall 15 at both ends of the body 10 continues to press the battery assembly 20, the clamping arm is withdrawn from the recess 150 of the lower housing 10, and the recess of the lower housing 10 is passed through the potting glue after the clamping arm is withdrawn.
  • 150 is filled to avoid battery performance when the battery is inflated due to the small pressing area.
  • a corresponding end plate 30 is disposed on the outer side of the first side wall 15 and is fixed to the lower casing 10 for improving the strength of the entire battery module.
  • the battery module of the present invention has the following technical effects:
  • the first side wall 15 at the two ends of the lower casing 10 is provided with a recess 150 for facilitating the assembly of the battery assembly 20, which improves the assembly efficiency of the battery module;
  • the unit cell 200 is loaded into the lower casing 10 by pressurization, thereby effectively reducing the size of the battery module;

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

Abstract

一种电池模组，包括下壳体（10），为顶部具有开口的腔体结构，下壳体（10）的两端设置有第一侧壁（15），两侧设置有第二侧壁（16）；以及电池集合体（20），包含多个单体电池（200），收容于下壳体（10）内；其中，第一侧壁（15）于靠近电池集合体（20）的一侧设有凹槽（150），凹槽（150）自下壳体（10）的开口向下延伸。与现有技术相比，该电池模组体积小、重量轻、装配效率快、能量密度高。

Description

电池模组 技术领域
本发明属于电池领域，更具体地说，本发明涉及一种电池模组。
背景技术
传统的电池模组的壳体通常为端板和侧板焊接结构，装配时先将端板和电池集合单元通过夹具夹紧后再与侧板焊接固定，这种装配方式效率低，而且焊接要求高，不利于工业化生产。
现有技术中，也有将电池直接安装到顶部具有开口的封闭式的电池模组的壳体中，然后通过顶盖进行密封，这种方式可在一定程度上提升装配效率，但这种结构的电池模组在装配时，由于电池模组的壳体无放置夹具的空间，电池放入壳体时只能采用间隙入壳的方式，这就要求壳体的尺寸的偏差必须为电池尺寸累计误差的极限正偏差，然后使用灌胶工艺来填充电池与壳体之间的间隙。相比于传统的压紧式电池模组，这种结构增大了电池模组的尺寸，灌胶量大，导致电池模组重量增加，对电池模组的体积密度和能量密度都造成了很大的损失。
有鉴于此，确有必要提供一种体积小、重量轻、装配效率快、能量密度高的电池模组。
发明内容
本发明的目的在于：克服现有技术的不足，提供一种体积小、重量轻、装配效率快、能量密度高的电池模组。
为了实现上述目的，本发明提供了一种电池模组，包括：
下壳体，为顶部具有开口的腔体结构，下壳体的两端设置有第一侧壁，两侧设置有第二侧壁；以及
电池集合体，包含多个单体电池，收容于下壳体内；
其中，第一侧壁于靠近电池集合体的一侧设有凹槽，凹槽自下壳体的开口向下延伸。
作为本发明电池模组的一种改进，所述第一侧壁远离电池集合体的一侧上设置有凸台，凸台与凹槽对应设置。
作为本发明电池模组的一种改进，所述第一侧壁的外部设置有与下壳体固定连接的端板，端板上开设有凹陷部，第一侧壁上的凸台收容于端板的凹陷部内。
作为本发明电池模组的一种改进，所述端板上设置有减重孔。
作为本发明电池模组的一种改进，所述第一侧壁上设置有减重孔。
作为本发明电池模组的一种改进，所述第一侧壁上的凹槽为梯形、半圆形或矩形。
作为本发明电池模组的一种改进，所述第一侧壁上的凹槽的高度不小于所述第一侧壁高度的一半。
作为本发明电池模组的一种改进，所述第一侧壁靠近电池集合体的一侧分别设有两个或多个间隔设置的凹槽。
作为本发明电池模组的一种改进，所述第一侧壁上的凹槽设置成收容夹持电池集合体的夹具。
作为本发明电池模组的一种改进，所述第一侧壁上的凹槽在电池集合体收容于下壳体后填充有灌封胶。
相对于现有技术，本发明电池模组具有以下技术效果：
1)下壳体两端的第一侧壁上设置有便于电池集合体装配的凹槽，提高了电池模组的装配效率；
2)单体电池通过加压装入下壳体，有效减小电池模组的尺寸；
3)单体电池之间、单体电池与下壳体之间的间隙减小，减少了灌封胶量， 减轻了电池模组的重量，提高了能量密度；
4)下壳体与单体电池之间都存在压紧力，并通过灌封胶的粘接，使得电池集合体的固定更加牢固，提高了电池模组的安全性能。
附图说明
下面结合附图和具体实施方式，对本发明电池模组及其有益技术效果进行详细说明，其中：
图1为本发明实施例1电池模组结构的分解示意图。
图2为本发明实施例1电池模组的结构示意图。
图3为本发明实施例1电池模组下壳体结构的俯视图。
图4为图3圆圈部的放大示意图。
图5为本发明实施例1电池模组的端板的结构示意图。
图6为本发明实施例1电池模组端板的俯视图。
图7为本发明实施例2电池模组结构的分解示意图。
图8为本发明实施例2电池模组下壳体结构的俯视图。
图9为图8圆圈部的放大示意图。
图10为本发明电池模组的组装过程示意图。
附图标记：
10-下壳体；15-第一侧壁；150-凹槽；152-凸台；154-减重孔；16-第二侧壁；
20-电池集合体；200-单体电池；
30-端板；300-凹陷部；304-减重孔。
具体实施方式
为了使本发明的目的、技术方案和有益技术效果更加清晰，以下结合附图和具体实施方式，对本发明进行进一步详细说明。应当理解的是，本说明书中描述的具体实施方式只是为了解释本发明，并非为了限定本发明。
请参阅图1至图10所示，本发明电池模组包括：
下壳体10，为顶部具有开口的腔体结构，下壳体10的两端设置有第一侧壁15，两侧设置有第二侧壁16；以及
电池集合体20，包含多个单体电池200，收容于下壳体10内；
其中，第一侧壁10于靠近电池集合体20的一侧设有凹槽150，凹槽150自下壳体10的开口向下延伸。
实施例1
请参阅图1至图6所示，下壳体10的两端设置有第一侧壁15，两侧设置有第二侧壁16，第一侧壁15和第二侧壁16的厚度一致。下壳体10两端的第一侧壁15于靠近电池集合体20的一侧分别设有两个凹槽150，两端的第一侧壁15上的凹槽150位置对应，凹槽150自下壳体10的开口端向下延伸，并向第一侧壁15内部开设，在第一侧壁15上形成一个缺口，凹槽150的结构为梯形、半圆形或矩形，在图示实施方式中，凹槽150为梯形。
凹槽150位置所在的第一侧壁15在远离电池集合体20的一侧设置有凸台152，凸台152与凹槽150对应设置,凸台152与凹槽150的形状相同或相似，凸台152的厚度与第一侧壁15的厚度一致。因为凸台152和凹槽150对应设置，凸台152的个数与凹槽150的个数对应。凸台152从下壳体10的开口端沿着第一侧壁15从顶部延伸到底部，便于分散第一侧壁15上的应力。
凹槽150的高度不小于第一侧壁15的高度的一半，凹槽150设置成收容夹持电池集合体20的夹具，在夹持臂夹紧电池集合体20装入下壳体10时，满足夹持臂能够插入凹槽150，既保证电池集合体20在收容于下壳体10的过程中不发生松动，又能保证电池集合体20顺利装入下壳体10中。在图示实施方式中，凹槽150的高度与第一侧壁15的高度一致，从第一侧壁15的顶部向下开设到底部。
下壳体10的材质为铝材或高分子材料，并通过一体铸造为整体结构，在组 装电池模组时，采用整体结构的下壳体10能够提高电池模组的组装效率。当下壳体10的材质为铝材时，则采用拉伸工艺制成，拉伸模具应设计有凸台，保证下壳体10的凹槽150可以拉伸成形；当下壳体10的材质为高分子材料时，则采用注塑或吹塑等工艺制成。
请继续参阅图1所示，电池集合体20包括多个单体电池200，通过夹持臂将多个单体电池200夹紧实现快速装配。单体电池200的壳体为铝壳或塑料壳体，优选聚丙烯塑料壳体，通过采用聚丙烯塑料壳体可大幅度减轻单体电池200的重量，提高电池模组的能量密度。
请参阅图1、图5和图6所示，根据本发明电池模组的一种优选实施方式，下壳体10第一侧壁15的外部还设置有端板30，端板30上设置有两个梯形凹陷部300，其形状也可为半圆形或矩形，主要根据下壳体10上凸台152的形状进行调整，凹陷部300的位置与下壳体10上凸台152的位置对应，并将凸台152收容在凹陷部300内。
端板30主要用于阻碍下壳体10的变形，由于下壳体10的第一侧壁15和第二侧壁16的壁厚比较薄，第一侧壁15上还开设有便于装入电池集合体20的凹槽150，在使用过程中，电池集合体20发生膨胀易导致下壳体10发生形变，通过在第一侧壁15的外部额外增设端板30，端板30的厚度大于第一侧壁15和第二侧壁16的壁厚，可以阻碍形变的发生，提高电池模组的结构强度。
端板30上还设置有减重孔304，在保证端板30结构强度的前提下，能够减轻端板30的重量，进而提高电池模组的能量密度。端板30材质为铝材或高分子材料，当材质为铝材时，则通过挤压成型；当材质为高分子材料时，则通过注塑成型。在进行固定连接时，端板30的材质与下壳体10的材质一致，端板30和下壳体10在电池集合体20入壳前使用焊接工艺焊接成一体。
实施例2
图7～9所示为本发明电池模组实施例2的示意图，其结构与本发明电池模 组实施例1的结构基本相同，不同之处在于：下壳体10两端的第一侧壁15上设置有凹槽150所在位置远离电池集合体20的一侧上没有设置凸台，因为没有设置凸台，为便于将凹槽150开设在第一侧壁15上而不影响第一侧壁15的强度，下壳体10两端的第一侧壁15的厚度大于下壳体10两侧第二侧壁16的厚度，即使电池集合体20在使用过程中发生膨胀，因为第一侧壁15的厚度比较厚，也能够防止下壳体10的形变。为减轻整个下壳体10的重量，提高电池模组的能量密度，下壳体10两端的第一侧壁15上还设置有若干减重孔154。
电池模组的组装过程如下：请参阅图10所示，单体电池200在装入下壳体10之前，先在夹具上将多个单体电池200成组成电池集合体20。夹具加压使多个单体电池200夹紧，满足要求的模组长度和夹紧力后，夹具将电池集合体20夹起，然后夹具的夹持臂随电池集合体20一起装入下壳体10，其中夹持臂沿着下壳体10两端的凹槽150进入下壳体10，当电池集合体20底部与下壳体10底部接触后，夹持臂泄掉夹紧力，下壳体10两端的第一侧壁15会继续压紧电池集合体20，夹持臂从下壳体10的凹槽150内退出，夹持臂退出后通过灌封胶对下壳体10的凹槽150进行填充，避免电池膨胀时由于压紧面积过小而影响电池性能。当第一侧壁15上设置有凸台152时，在第一侧壁15的外侧设置相应的端板30与下壳体10焊接固定，用于提高整个电池模组的强度。
相对于现有技术，本发明电池模组具有以下技术效果：
1)下壳体10两端的第一侧壁15上设置有便于电池集合体20装配的凹槽150，提高了电池模组的装配效率；
2)单体电池200通过加压装入下壳体10，有效减小电池模组的尺寸；
3)单体电池200之间、单体电池200与下壳体10之间的间隙减小，减少了灌封胶量，减轻了电池模组的重量，提高了能量密度；
4)下壳体10与单体电池200之间都存在压紧力，并通过灌封胶的粘接，使得电池集合体20的固定更加牢固，提高了电池模组的安全性能。
根据上述原理，本发明还可以对上述具体实施方式进行适当的变更和修改。因此，本发明并不局限于上面揭示和描述的具体实施方式，对本发明的一些修改和变更也应当落入本发明的权利要求的保护范围内。此外，尽管本说明书中使用了一些特定的术语，但这些术语只是为了方便说明，并不对本发明构成任何限制。

Claims (10)

  1. 一种电池模组，其特征在于，包括：
    下壳体，为顶部具有开口的腔体结构，下壳体的两端设置有第一侧壁，两侧设置有第二侧壁；以及
    电池集合体，包含多个单体电池，收容于下壳体内；
    其中，第一侧壁于靠近电池集合体的一侧设有凹槽，凹槽自下壳体的开口向下延伸。
  2. 根据权利要求1所述的电池模组，其特征在于，所述第一侧壁远离电池集合体的一侧上设置有凸台，凸台与凹槽对应设置。
  3. 根据权利要求2所述的电池模组，其特征在于，所述第一侧壁的外部设置有与下壳体固定连接的端板，端板上开设有凹陷部，第一侧壁上的凸台收容于端板的凹陷部内。
  4. 根据权利要求3所述的电池模组，其特征在于，所述端板上设置有减重孔。
  5. 根据权利要求1所述的电池模组，其特征在于，所述第一侧壁上设置有减重孔。
  6. 根据权利要求1所述的电池模组，其特征在于，所述第一侧壁上的凹槽为梯形、半圆形或矩形。
  7. 根据权利要求1所述的电池模组，其特征在于，所述第一侧壁上的凹槽的高度不小于所述第一侧壁高度的一半。
  8. 根据权利要求1所述的电池模组，其特征在于，所述第一侧壁靠近电池集合体的一侧分别设有两个或多个间隔设置的凹槽。
  9. 根据权利要求1至8中任一项所述的电池模组，其特征在于，所述第一侧壁上的凹槽设置成收容夹持电池集合体的夹具。
  10. 根据权利要求9所述的电池模组，其特征在于，所述第一侧壁上的凹槽 在电池集合体收容于下壳体后填充有灌封胶。
PCT/CN2017/115065 2017-07-10 2017-12-07 电池模组 Ceased WO2019010911A1 (zh)

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