WO2019037366A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2019037366A1
WO2019037366A1 PCT/CN2017/118557 CN2017118557W WO2019037366A1 WO 2019037366 A1 WO2019037366 A1 WO 2019037366A1 CN 2017118557 W CN2017118557 W CN 2017118557W WO 2019037366 A1 WO2019037366 A1 WO 2019037366A1
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WIPO (PCT)
Prior art keywords
hollow
hole
battery module
connecting piece
output connecting
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Ceased
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PCT/CN2017/118557
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English (en)
French (fr)
Inventor
肖信福
朱涛声
马林
秦峰
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Publication of WO2019037366A1 publication Critical patent/WO2019037366A1/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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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 invention relates to the field of battery technologies, and in particular, to a battery module.
  • the two output connecting pieces of the battery module are generally disposed outside the casing for electrically connecting the battery module to the external charging and discharging device. At present, there is no sealing process between each output connecting piece of the existing battery module and the through hole of the box.
  • an object of the present invention is to provide a battery module which is simple in process, low in cost and good in sealing effect.
  • the present invention provides a battery module comprising: a box body provided with a through hole; a plurality of secondary batteries housed in the box body; two output connecting pieces, each output connecting piece fixedly connected to One of the secondary batteries extends out of the box through a corresponding through hole in the case; and at least one sealing member, each sealing member is disposed between the corresponding one of the output connecting piece and the corresponding through hole of the case and sealing the output a connecting piece and the through hole.
  • a sealing member is disposed between the at least one output connecting piece and the corresponding through hole of the case, and the sealing member is sealingly connected to the one output connecting piece and the corresponding through hole, so that the output connecting piece
  • the sealing between the corresponding through holes is achieved via the seal, and the sealing effect is good.
  • the process of sealing the battery module is simple, and the cost is greatly reduced.
  • FIG. 1 is a general assembly diagram of a battery module in accordance with the present invention.
  • FIG. 2 is a perspective view of the battery module of FIG. 1 with the upper cover removed.
  • FIG 3 is a perspective view of the battery module of Figure 2 with the output tab, seal and electrical connector removed.
  • Fig. 4 is a cross-sectional view taken along line A-A of Fig. 1.
  • Fig. 5 is an enlarged view of a circled portion in Fig. 4.
  • Fig. 6 is a modification of Fig. 5;
  • Fig. 7 is a perspective view showing the output connecting piece of the battery module of the present invention connected to the sealing member.
  • Figure 8 is a perspective view of the seal of Figure 7.
  • Figure 9 is a right side view of Figure 8.
  • Fig. 10 is a cross-sectional view taken along line B-B of Fig. 9.
  • a battery module includes: a case 1 provided with a through hole 11; a plurality of secondary batteries 2 housed in the case 1; two output connection pieces 3, each output connection The sheet 3 is fixedly connected to one of the secondary batteries 2 and protrudes out of the housing 1 via a corresponding through hole 11 in the housing 1; and at least one sealing member 4, each sealing member 4 is disposed on a corresponding output connecting piece 3 and a box The output connecting piece 3 and the through hole 11 are sealed between the corresponding through holes 11 of the body 1.
  • a sealing member 4 is disposed between the at least one output connecting piece 3 and the corresponding through hole 11 of the casing 1, and the sealing member 4 sealingly connects the one output connecting piece 3 and the corresponding through hole. 1, the output connecting piece 3 is sealed with the corresponding through hole 1 via the sealing member 4, and the sealing effect is good. Moreover, the process of sealing the battery module is simple, and the cost is greatly reduced.
  • the secondary battery 2 in the battery module of the present invention may be a pouch type secondary battery (having two poles having opposite polarity, and each output stage connecting piece 3 is welded to Corresponding polar ear), cylindrical secondary battery or prismatic secondary battery (two poles with opposite polarity are provided, and each output stage connecting piece 3 is welded to the corresponding pole).
  • the battery module may further include: a plurality of electrical connecting sheets 5, each of the electrical connecting sheets 5 being electrically connected to the corresponding secondary battery 2 for realizing a string between the plurality of secondary batteries 2. in parallel. It is additionally noted that, according to the specific series-parallel manner of all the secondary batteries 2, the two output connecting pieces 3 may be fixedly connected to the same secondary battery 2, or may be fixedly connected to two different secondary batteries 2 .
  • the sealing member 4 may be only one.
  • the one sealing member 4 is disposed between one of the output connecting pieces 3 and the corresponding through hole 11 of the casing 1 and is sealingly connected to the output connecting piece 3 and the casing. 1.
  • the sealing member 4 can be two, and the two sealing members 4 are respectively disposed between the corresponding one of the output connecting piece 3 and the corresponding through hole 11 of the case 1 and are sealingly connected to the output connecting piece 3 and
  • the cabinet 1 is as shown in Fig. 1 and Fig. 2.
  • each sealing member 4 may have a hollow insertion portion 41 passing through a corresponding through hole 11 of the casing 1 and at one side of the through hole 11; a hollow stopper portion 42, and The hollow insertion portion 41 is oppositely disposed and stopped on the other side of the through hole 11; and the hollow snap portion 43 is connected between the hollow insertion portion 41 and the hollow stopper portion 42 to the hollow insertion portion 41 and the hollow stopper portion 42 is for mating with the through hole 11 (such as an interference fit) and sealing the through hole 11.
  • each sealing member 4 communicates with each other for the corresponding output connecting piece 3 to pierce and seal the output connecting piece 3, so that the output connecting piece 3
  • the sealing between the corresponding through hole 1 is achieved via the seal 4 and the sealing effect achieved is good.
  • the hollow insertion portion 41 is on the side of the through hole 11 remote from the secondary battery 2 (ie, the outside of the case 1), and the hollow stop portion 42 is in a state close to the secondary battery 2. Side (ie the inside of the box 1).
  • the hollow insertion portion 41 is on the side close to the secondary battery 2, and the hollow stopper portion 42 is on the side away from the secondary battery 2.
  • the surface of the hollow insertion portion 41 of each sealing member 41 opposed to the hollow stopper portion 42, the surface of the hollow stopper portion 42 opposed to the hollow insertion portion 41, and the hollow snap portion 43 The outer surfaces together form a card slot structure 44.
  • the card slot structure 44 engages the case 1 together with the hollow snap portion 43, the hollow insertion portion 41, and the hollow stop portion 42, so that the seal members 4 are sealed to the corresponding through holes 11 of the case 1.
  • the hollow insertion portion 41, the hollow stopper portion 42, and the hollow snap portion 43 of each of the seal members 4 are integrally formed, such as injection molding.
  • each of the sealing members 4 and the corresponding output connecting piece 3 are insert molding, that is, each sealing member 4 is injection molded on the output connecting piece 3 to be integrally formed.
  • the sealing member 4 in order to ensure that each sealing member 4 can be elastically deformed when mated with the corresponding through hole 11 of the casing 1, the sealing member 4 can be made of an elastic material, thereby hollow insertion of the sealing member 4.
  • the portion 41 is compressed and deformed to pass through the corresponding through hole 11 and on one side of the through hole 11 , and the hollow snap portion 43 is compressed and deformed to cooperate with the through hole 11 , thereby causing each sealing member 4 to be in the case 1
  • the corresponding through holes 11 are sealed and the sealing effect achieved is good.
  • the elastic material may be rubber, flexible polypropylene or flexible polyurethane or the like.
  • the cross-sectional area of the hollow insertion portion 41 at least near one end of the hollow snap portion 43 is larger than the cross-sectional area of the corresponding through hole 11 (this is the correspondence of each seal 4 with the case 1).
  • the through hole 11 is sealed in a state after the connection, so that the hollow insertion portion 41 is stopped on the side of the through hole 11 after being passed through the corresponding through hole 11 and returned to the state before being compressed and deformed.
  • the cross-sectional area of the hollow insertion portion 41 gradually increases from one end away from the hollow engaging portion 43 toward the end close to the hollow engaging portion 43 , which facilitates the passage of the hollow insertion portion 41 through the corresponding passage of the casing 1 .
  • the cross-sectional area of the hollow stop portion 42 at least near one end of the hollow snap portion 43 is larger than the cross-sectional area of the corresponding through hole 11, so that the hollow stop portion 42 and the hollow insertion portion 41 are The two sides of the through hole 11 are clamped to the casing 1 to achieve a good sealing effect.
  • the case 1 may include: an upper cover 12; and a lower case 13 fitted to the upper cover 12 and accommodating the plurality of secondary batteries 2 together with the upper cover 12, and the through holes 11 is disposed on the lower case 13.

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

Abstract

本发明提供了一种电池模组，其包括：箱体，设置有通孔；多个二次电池，收容于箱体内；两个输出连接片，各输出连接片固定连接于其中一个二次电池并经由箱体上对应的通孔伸出箱体外；以及至少一个密封件，各密封件设置于对应一个输出连接片与箱体的对应的通孔之间并密封该输出连接片和该通孔。在根据本发明的电池模组中，至少一个输出连接片与箱体的对应的通孔之间设置有密封件，密封件密封连接该一个输出连接片和对应的通孔，从而该输出连接片经由密封件实现与对应的通孔之间的密封，密封效果好。且电池模组的这种密封方式的工艺简单，大大降低了成本。

Description

电池模组 技术领域
本发明涉及电池技术领域，尤其涉及一种电池模组。
背景技术
电池模组的两个输出连接片通常穿设于箱体外、用于将电池模组电连接于外部充放电设备。目前，现有的电池模组的各输出连接片与箱体的通孔之间不做密封处理。
发明内容
鉴于背景技术中存在的问题，本发明的目的在于提供一种电池模组，其工艺简单、成本低、密封效果好。
为了实现上述目的，本发明提供了一种电池模组，其包括：箱体，设置有通孔；多个二次电池，收容于箱体内；两个输出连接片，各输出连接片固定连接于其中一个二次电池并经由箱体上对应的通孔伸出箱体外；以及至少一个密封件，各密封件设置于对应一个输出连接片与箱体的对应的通孔之间并密封该输出连接片和该通孔。
本发明的有益效果如下：
在根据本发明的电池模组中，至少一个输出连接片与箱体的对应的通孔之间设置有密封件，密封件密封连接该一个输出连接片和对应的通孔，从而该输出连接片经由密封件实现与对应的通孔之间的密封，密封效果好。且电池模组的这种密封方式的工艺简单，大大降低了成本。
附图说明
图1是根据本发明的电池模组的总装图。
图2是图1中的电池模组移除上盖后的立体图。
图3是图2中的电池模组进一步移除输出连接片、密封件和电连接片后 的立体图。
图4是沿图1中的A-A线切分后的剖视图。
图5是图4中的圆圈部分的放大图。
图6是图5的变形例。
图7是本发明的电池模组的输出连接片与密封件连接后的立体图。
图8是图7中的密封件的立体图。
图9是图8的右视图。
图10是沿图9中的B-B线切分后的剖视图。
其中，附图标记说明如下：
1箱体                       4密封件
11通孔                      41中空插入部
12上盖                      42中空止挡部
13下箱体                    43中空卡接部
2二次电池                   44卡槽结构
3输出连接片                 5电连接片
具体实施方式
下面参照附图来详细说明根据本发明的电池模组。
参照图1至图10，根据本发明的电池模组包括：箱体1，设置有通孔11；多个二次电池2，收容于箱体1内；两个输出连接片3，各输出连接片3固定连接于其中一个二次电池2并经由箱体1上对应的通孔11伸出箱体1外；以及至少一个密封件4，各密封件4设置于对应一个输出连接片3与箱体1的对应的通孔11之间并密封该输出连接片3和该通孔11。
在根据本发明的电池模组中，至少一个输出连接片3与箱体1的对应的通孔11之间设置有密封件4，密封件4密封连接该一个输出连接片3和对应的通孔1，从而该输出连接片3经由密封件4实现与对应的通孔1之间的密封，密封效果好。且电池模组的这种密封方式的工艺简单，大大降低了成本。
这里，基于二次电池2的外壳的类型，本发明的电池模组中的二次电池2可以为袋型二次电池(具有电极性相反的两个极耳，各输出级连接片3焊接于对应的极耳)、柱形二次电池或棱形二次电池(设置有电极性相反的两 个极柱，各输出级连接片3焊接于对应的极柱)。
参照图2和图4，电池模组还可包括：多个电连接片5，各电连接片5电连接于对应的二次电池2，以用于实现多个二次电池2之间的串并联。在这里补充说明的是，根据所有二次电池2的具体的串并联方式，两个输出连接片3可以固定连接于同一个二次电池2，也可固定连接于两个不同的二次电池2。
在一实施例中，密封件4可仅为一个，该一个密封件4设置于其中一个输出连接片3与箱体1的对应的通孔11之间并密封连接该输出连接片3与箱体1。在另一实施例中，密封件4可为两个，两个密封件4分别设置于对应一个输出连接片3与箱体1的对应的通孔11之间并密封连接该输出连接片3与箱体1，如图1图2所示。
参照图5至图8以及图10，各密封件4可具有：中空插入部41，穿过箱体1的对应的通孔11并处于该通孔11的一侧；中空止挡部42，与中空插入部41相对设置并止挡在该通孔11的另一侧；以及中空卡接部43，在中空插入部41与中空止挡部42之间连接于中空插入部41与中空止挡部42，用于与该通孔11配合(如过盈配合)并密封该通孔11。其中，各密封件4的中空插入部41、中空止挡部42以及中空卡接部43的内部互相连通以供对应的输出连接片3穿设并密封该输出连接片3，从而该输出连接片3经由密封件4实现与对应的通孔1之间的密封，且达到的密封效果好。
在一实施例中，参照图5，中空插入部41处于通孔11的远离二次电池2的一侧(即箱体1的外侧)、而中空止挡部42处于靠近二次电池2的一侧(即箱体1的内侧)。在另一实施例中，参照图6，中空插入部41处于靠近二次电池2的一侧、而中空止挡部42处于远离二次电池2的一侧。
参照图7、图8和图10，各密封件4的中空插入部41的与中空止挡部42相对的表面、中空止挡部42的与中空插入部41相对的表面以及中空卡接部43的外表面一起形成卡槽结构44。卡槽结构44与中空卡接部43、中空插入部41以及中空止挡部42一起卡紧箱体1，从而使各密封件4密封连接箱体1的对应的通孔11。
各密封件4的中空插入部41、中空止挡部42以及中空卡接部43一体成型而成，如注塑成型。
各密封件4与对应的输出连接片3采用嵌件模制成型(insert molding)，即各密封件4注塑于输出连接片3而成型为一体。
在根据本发明的电池模组中，为了保证各密封件4在与箱体1的对应的通孔11配合时能够产生弹性变形，密封件4可由弹性材料制成，从而密封件4的中空插入部41被压缩变形而穿过对应的通孔11并处于该通孔11的一侧、中空卡接部43被压缩变形并与该通孔11配合，进而使各密封件4在与箱体1的对应的通孔11密封连接，且达到的密封效果好。进一步地，弹性材料可为橡胶、柔性聚丙烯或软质聚氨酯等。
参照图5和图6，中空插入部41的至少靠近中空卡接部43的一端的横截面面积大于对应的通孔11的横截面面积(这是各密封件4在与箱体1的对应的通孔11密封连接后的状态)，从而使中空插入部41在穿过对应的通孔11后，由于能够恢复到被压缩变形前的状态而止挡在该通孔11的一侧。进一步地，中空插入部41的横截面面积从远离中空卡接部43的一端向靠近中空卡接部43的一端逐渐增大，这样有利于中空插入部41穿设于箱体1的对应的通孔11。
参照图5和图6，中空止挡部42的至少靠近中空卡接部43的一端的横截面面积大于对应的通孔11的横截面面积，从而使中空止挡部42与中空插入部41从该通孔11的两侧卡紧箱体1，进而达到很好的密封效果。
参照图1和图,4，箱体1可包括：上盖12；以及下箱体13，装配于上盖12并与上盖12一起收容所述多个二次电池2，且所述通孔11设置于下箱体13上。

Claims (10)

  1. 一种电池模组，包括：
    箱体(1)，设置有通孔(11)；
    多个二次电池(2)，收容于箱体(1)内；以及
    两个输出连接片(3)，各输出连接片(3)固定连接于其中一个二次电池(2)并经由箱体(1)上对应的通孔(11)伸出箱体(1)外；
    其特征在于，电池模组还包括：
    至少一个密封件(4)，各密封件(4)设置于对应一个输出连接片(3)与箱体(1)的对应的通孔(11)之间并密封该输出连接片(3)和该通孔(11)。
  2. 根据权利要求1所述的电池模组，其特征在于，
    密封件(4)仅为一个；或者
    密封件(4)为两个。
  3. 根据权利要求1所述的电池模组，其特征在于，各密封件(4)具有：
    中空插入部(41)，穿过箱体(1)的对应的通孔(11)并处于该通孔(11)的一侧；
    中空止挡部(42)，与中空插入部(41)相对设置并止挡在该通孔(11)的另一侧；以及
    中空卡接部(43)，在中空插入部(41)与中空止挡部(42)之间连接于中空插入部(41)与中空止挡部(42)，用于与该通孔(11)配合并密封该通孔(11)；
    其中，各密封件(4)的中空插入部(41)、中空止挡部(42)以及中空卡接部(43)的内部互相连通以供对应的输出连接片(3)穿设并密封该输出连接片(3)。
  4. 根据权利要求3所述的电池模组，其特征在于，
    中空插入部(41)处于通孔(11)的远离二次电池(2)的一侧、而中空止挡部(42)处于靠近二次电池(2)的一侧；或者
    中空插入部(41)处于靠近二次电池(2)的一侧、而中空止挡部(42)处于远离二次电池(2)的一侧。
  5. 根据权利要求3所述的电池模组，其特征在于，各密封件(4)的中空插入部(41)的与中空止挡部(42)相对的表面、中空止挡部(42)的与中空插入部(41)相对的表面以及中空卡接部(43)的外表面一起形成卡槽结构(44)。
  6. 根据权利要求3所述的电池模组，其特征在于，中空插入部(41)的至少靠近中空卡接部(43)的一端的横截面面积大于对应的通孔(11)的横截面面积。
  7. 根据权利要求6所述的电池模组，其特征在于，中空插入部(41)的横截面面积从远离中空卡接部(43)的一端向靠近中空卡接部(43)的一端逐渐增大。
  8. 根据权利要求3所述的电池模组，其特征在于，中空止挡部(42)的至少靠近中空卡接部(43)的一端的横截面面积大于对应的通孔(11)的横截面面积。
  9. 根据权利要求1所述的电池模组，其特征在于，密封件(4)与输出连接片(3)采用嵌件模制成型。
  10. 根据权利要求1所述的电池模组，其特征在于，密封件(4)由弹性材料制成。
PCT/CN2017/118557 2017-08-23 2017-12-26 电池模组 Ceased WO2019037366A1 (zh)

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