WO2022218236A1 - 电池包缓冲装置、电池包及车辆 - Google Patents

电池包缓冲装置、电池包及车辆 Download PDF

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Publication number
WO2022218236A1
WO2022218236A1 PCT/CN2022/085976 CN2022085976W WO2022218236A1 WO 2022218236 A1 WO2022218236 A1 WO 2022218236A1 CN 2022085976 W CN2022085976 W CN 2022085976W WO 2022218236 A1 WO2022218236 A1 WO 2022218236A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
flow channel
buffer device
liquid cooling
plate
Prior art date
Application number
PCT/CN2022/085976
Other languages
English (en)
French (fr)
Inventor
李华
郭军
徐超
Original Assignee
北京车和家信息技术有限公司
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Filing date
Publication date
Application filed by 北京车和家信息技术有限公司 filed Critical 北京车和家信息技术有限公司
Publication of WO2022218236A1 publication Critical patent/WO2022218236A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567Liquids
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the bottom of the battery pack there are usually two ways to protect the bottom of the battery pack: one is to set a plurality of buffer pads at intervals between the liquid cooling plate and the bottom shield of the battery module for partial filling, but the partial filling method has a low coverage rate. , the protection area is small, and the bottom of the battery pack cannot be fully protected, and the number of buffer pads is large, the assembly process is cumbersome, and time-consuming; the other is to use a whole piece of equal-thickness buffer pad to fill the liquid cooling plate and the bottom guard. Between the plates, when the bottom guard plate is squeezed by external force, the bottom guard plate is directly in contact with the buffer pad, and the buffer pad is directly in contact with the liquid cooling plate. Protective effect on the bottom of the battery pack.
  • the first object of the present disclosure is to provide a battery pack buffer device, which can solve the problem that the existing buffer device has an insignificant protection effect on the bottom of the battery pack.
  • a second object of the present disclosure is to provide a battery pack having the battery pack buffering device provided by the present disclosure.
  • a third object of the present disclosure is to provide a vehicle having the battery pack provided by the present disclosure.
  • the height of the support protruding strip is set so that the distance d between the top surface of the substrate and the bottom surface of the flow channel region is 2 mm ⁇ 5 mm.
  • the bottom of the liquid-cooling plate is formed with a plurality of flow channel regions arranged at intervals, and the number of supporting ridges is multiple to support the non-flow channel regions on both sides of the flow channel region.
  • the extension direction of the corresponding non-flow channel area is extended.
  • the width L1 of each support ridge is smaller than the width L2 of the non-flow channel region corresponding to the position of the support ridge.
  • a chamfered structure is formed at the edge of the support rib connected to the substrate, and/or
  • the supporting ribs are mounted on the substrate, or the supporting ribs are integrally formed on the substrate, and/or
  • the support ribs are bonded to the non-runner area.
  • a first anti-skid portion is provided on the surface of the support protruding strip that is in contact with the non-flow channel area.
  • the buffer device further includes a flexible pretensioning layer fixed on the side of the base plate opposite to the bottom guard, the flexible pretensioning layer being configured to be compressively installed between the base and the base guard.
  • the number of battery modules is multiple, and the number of buffer devices is multiple, so as to be respectively disposed at the bottom positions of the liquid cooling plates corresponding to the corresponding battery modules.
  • the third object of the present disclosure is to provide a vehicle including a battery pack, the battery pack being the above battery pack.
  • Fig. 5 is a partial enlarged view of part A in Fig. 4;
  • FIG. 6 is a partial structural cross-sectional view of a battery pack buffer device provided by an exemplary embodiment of the present disclosure
  • FIG. 7 is a schematic partial plan structure diagram of a battery pack buffer device provided by an exemplary embodiment of the present disclosure.
  • the present disclosure provides a buffer device for a battery pack, the buffer device 1 is used for contacting and disposed between the bottom shield 3 and the liquid cooling plate 2 of the battery pack.
  • the liquid cooling plate 2 may be a water cooling plate, and the bottom of the liquid cooling plate 2 includes a non-flow channel area 21 and a flow channel formed by protruding from the non-flow channel area 21 toward the side of the bottom shield 3 .
  • the flow channel area 22 protrudes downward from the non-flow channel area 21 to form a cavity, and a cooling liquid is arranged in the cavity to cool the battery module 4;
  • the buffer device 1 includes a bottom shield 3
  • the substrate 11 and the supporting ridges 12 disposed on the side of the substrate 11 away from the bottom guard 3 are configured to protrude from the side facing the liquid cooling plate 2 .
  • the base plate 11 ie, the support ridges 12 are disposed to protrude upward from the upper surface of the base plate 11 , and the support ridges 12 are used to contact the non-flow channel area 21 and make the flow channel area 22 not contact the buffer device 1 .
  • the bottom shield 3 of the battery pack When the bottom shield 3 of the battery pack is squeezed or impacted by an external force, it passes through the base plate 11 and the supporting ribs 12. The external force can be transmitted to the non-flow channel area 21 so that the bottom shield 3 will not touch the flow channel area 22 when it is deformed, so as to prevent the bottom shield 3 from being deformed and squeezed to the flow channel area 22 .
  • the support ridge 12 avoids the flow channel area 22, that is, the two sides of the support ridge 12 (refer to the support protrusion in FIG. 2 ).
  • the left and right sides of the strip 12) are not in contact with the two sides of the flow channel area 22 (refer to the left and right sides of the outer contour of the flow channel area in FIG. 2 );
  • the top surface of 11 is also not in contact with the bottom surface of the flow channel area 22, so that the buffer device 1 completely avoids the flow channel area 22 of the liquid cooling plate 2, ensuring that when the battery pack is subjected to external force, the flow channel area 22 is not affected.
  • the height of the support ribs 12 may be set such that the distance d between the top surface of the substrate 11 and the bottom surface of the flow channel region 22 may be 2 mm ⁇ 5 mm, for example, may be 3 mm, At this distance, the substrate 11 can be better protected from contact with the flow channel area 22 under various impact conditions, and the flow channel area 22 can be protected from being squeezed by external forces, so as to avoid affecting the thermal management performance of the battery pack, and improve the battery pack. Bottom safety protection level.
  • the arrangement of the flow channel regions 22 on the liquid cooling plate 2 can be various, for example, extending along the lateral direction of the liquid cooling plate 2 (inwardly perpendicular to the paper surface as shown in FIG. 2 ), along the liquid cooling plate 2
  • the longitudinal extension of the plate 2 (the left-right direction as shown in FIG. 2 ) can also be a linear structure or an irregular curved or bent structure. Since the supporting ridges 12 are configured to avoid the flow channel area 22 and match the configuration of the non-flow channel area 21 , the supporting ridges 12 may be respectively configured as straight lines or other irregular shapes as shown in FIG. 3 .
  • the support ribs 12 may be adhered to the non-flow channel region 21 .
  • the buffering device 1 can be pasted on the non-runner area 21 by the support protruding strip 12 or the non-runner area 21, and then the bottom guard plate 3 can be fixed on the lower box frame 7 so that the buffer device 1 is tightly packed between the bottom shield 3 and the liquid cooling plate 2, and the lower box structure including the buffer device 1 is now assembled and can be used in the assembly process of the battery pack.
  • the first anti-skid portion 122 can be provided as a plurality of spaced anti-skid strips protruding from the top surface of the support protruding strip 12 , for example, can be set to be similar to the pattern on a vehicle tire.
  • the buffer device 1 may further include a flexible preloading layer 13 fixed on the side of the base plate 11 opposite to the bottom shield 3 , and the flexible preloading layer 13 is configured to be able to be compressed and mounted on the base plate 11 and the bottom plate 3 . between the guards 3.
  • the flexible prestressing layer 13 can be pasted and fixed with the substrate 11 . On the one hand, it is convenient to install the flexible preloading layer 13 , and on the other hand, it is convenient to replace, repair and maintain the flexible preloading layer 13 and the substrate 11 . In other embodiments, the flexible pretensioning layer can also be integrated with the substrate 11 through a process such as secondary foaming, so as to improve the integrity of the buffer device 1 . When the flexible preloading layer 13 is provided, the flexible preloading layer 13 can also have the same function as when the above-mentioned substrate 11 is attached to the bottom shield 3, that is, through the characteristics of the flexible preloading layer 13, the 3.
  • the surface of the flexible preloading layer 13 in contact with the bottom guard 3 is provided with a second anti-slip portion 131 .
  • the contact effect between the flexible preloading layer 13 and the bottom shield 3 can be increased, so as to improve the buffering effect of the buffer device 1, so as to better protect the flow channel area of the liquid cold plate 2 when the bottom of the battery pack is impacted twenty two.
  • the moisture on the contact surface is squeezed into the anti-skid texture of the second anti-skid portion 131, so that there is a certain frictional force between the flexible preloading layer 13 and the bottom guard plate 3.
  • the structure of the second anti-skid portion 131 can be set to be the same as the structure of the first anti-skid portion 122 (refer to FIG. 5 ), which will not be described in detail here.
  • the buffer device 1 may be made of a hydrophobic material, so as to remove moisture in the battery pack in time to protect the battery pack when the battery pack is wading in water or the like.
  • the substrate 11 and the supporting ribs 12 can be made of EPDM (Ethylene Propylene Diene Monomer) material with high elastic modulus, foamed polyurethane, M-PPE (Modified Polypheyleneether) or foamed silica gel and other materials , so that the battery pack provides more resistance when squeezed by external force;
  • the flexible preload layer 13 can be made of a material with soft texture and low elastic modulus, such as EVA (Ethylene Vinyl Acetate) material.
  • EVA Ethylene Vinyl Acetate
  • a battery pack is also provided.
  • the battery pack includes a battery module 4 , an upper cover plate 6 arranged on the upper part of the battery module 4 , and a battery pack 6 arranged on the lower part of the battery module 4 in sequence.
  • the liquid cooling plate 2 and the bottom shield 3, and the buffer device 1 contacting and disposed between the liquid cooling plate 2 and the bottom shield 3, the buffer device 1 is the above-mentioned battery pack buffer device 1.
  • the battery pack has all the beneficial effects of the battery pack buffer device 1, which will not be repeated here.
  • the number of battery modules 4 may be multiple, and the number of buffer devices 1 may be multiple, so as to be respectively arranged at the bottom positions of the liquid cooling plates 2 corresponding to the corresponding battery modules.
  • the number of blocks of the buffer device 1 can be determined in combination with the arrangement of the battery module 4 and the arrangement of the middle beam 5 to adapt to the installation area inside the lower frame 7 of the battery pack, and to improve the contact effect of the buffer device 1 and the bottom of the battery pack to fully The buffering ability of the buffering device 1 when an external force is applied to the bottom of the battery pack is exerted.
  • the number of battery modules 4 can be four, and the buffer device 1 is correspondingly set to four, and the battery modules 4 are respectively arranged at the lower part of the liquid cooling plate 2, which not only makes the battery pack easier to assemble , which reduces the difficulty of assembly, and can also avoid setting a whole buffer device 1 at the bottom of the battery module 4 and cannot adapt to the internal environment of the battery pack, resulting in waste of materials, and it is difficult to ensure the buffer device 1 when the battery pack is impacted. ability.
  • a third aspect of the present disclosure provides a vehicle including a battery pack, the battery pack being the above-mentioned battery pack.
  • the vehicle has all the beneficial effects of the above-mentioned battery pack, which will not be repeated here.

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

Abstract

本公开涉及一种电池包缓冲装置、电池包及车辆,缓冲装置用于接触设置在电池包的底护板和液冷板之间,液冷板的底部包括非流道区域和从非流道区域朝向底护板的一侧凸出形成的流道区域,缓冲装置包括与底护板贴合设置的基板和设置于基板的背离底护板一侧的支撑凸条,其构造为朝向液冷板的一侧凸出于基板,用于与非流道区域接触,并使得流道区域与缓冲装置不接触。

Description

电池包缓冲装置、电池包及车辆
相关申请的交叉引用
本申请基于申请号为202120790706.8、申请日为2021年04月16日的中国专利申请提出,并要求该中国专利申请的优先权,该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开涉及电动汽车制造领域,具体地,涉及一种电池包缓冲装置、电池包及车辆。
背景技术
电动汽车销量逐年增加,外出使用路况和场景复杂多变,电池包的底部安全防护需求也因此面临更严峻的挑战,为保护电池包,通常对底护板处的结构进行设计优化。
相关技术中,为保护电池包底部通常有两种方式:一种是在电池模组的液冷板和底护板之间间隔设置多个缓冲垫进行局部填充,但是局部填充的方式覆盖率低,防护区域小,不能对电池包的底部安全做到全面防护,且缓冲垫数量多,装配过程繁琐,耗费工时;另外一种是采用一整块等厚度缓冲垫填充在液冷板和底护板之间,当底护板受到外力挤压时,底护板直接与缓冲垫接触、缓冲垫直接与液冷板接触,导致液冷板的流道会受力而可能会导致损坏,从而影响对电池包底部的防护效果。
发明内容
本公开的第一个目的是提供一种电池包缓冲装置,该电池包缓冲装置能够解决现有的缓冲装置对电池包底部的保护效果不明显的问题。
本公开的第二个目的是提供一种电池包,该电池包具有本公开提供的电池包缓冲装置。
本公开的第三个目的是提供一种车辆,该车辆具有本公开提供的电池包。
为了实现上述目的,本公开提供一种电池包缓冲装置,缓冲装置用于接触设置在电池包的底护板和液冷板之间,液冷板的底部包括非流道区域和从非流道区域朝向底护板的一侧凸出形成的流道区域,缓冲装置包括与底护板贴合设置的基板和设置于基板的背离底护板一侧的支撑凸条,支撑凸条构造为朝向液冷板的一侧凸出于基板,用于与非流道区域接触,并使得流道区域与缓冲装置不接触。
可选地,支撑凸条的高度设置成使得基板的顶面与流道区域的底面之间的距离d为2mm~5mm。
可选地,液冷板的底部形成有多个间隔设置的流道区域,支撑凸条的数量为多个,以支撑在流道区域两侧的非流道区域,多个支撑凸条分别沿相应的非流道区域的延伸 方向延伸设置。
可选地,支撑凸条的宽度L1大于支撑凸条的高度h。
可选地,每个支撑凸条的宽度L1小于与支撑凸条位置对应的非流道区域的宽度L2。
可选地,支撑凸条包括在延伸方向上间隔设置的分体。
可选地,支撑凸条的与基板连接的边缘处形成有倒角结构,以及/或者
支撑凸条安装于基板,或者支撑凸条一体形成于基板,以及/或者
支撑凸条粘接于非流道区域。
可选地,支撑凸条的与非流道区域接触的表面上设置有第一防滑部。
可选地,缓冲装置还包括固定在基板的与底护板相对的侧面上的柔性预紧层,柔性预紧层配置为能够被压缩安装在基板和底护板之间。
可选地,柔性预紧层的与底护板接触的表面设置有第二防滑部。
本公开的第二个目的,提供一种电池包,包括电池模组、依次设置在电池模组下部的液冷板和底护板,以及接触设置在液冷板与底护板之间的缓冲装置,缓冲装置为以上的电池包缓冲装置。
可选地,电池模组的数量为多个,缓冲装置的数量为多个,以用于分别设置在相应的电池模组所对应的液冷板的底部位置处。
本公开的第三个目的,提供一种车辆,包括电池包,该电池包为以上的电池包。
通过上述技术方案,本公开提供的电池包缓冲装置通过基板与底护板贴合设置,基板上设置支撑凸条与非流道区域直接接触,以使得缓冲装置能够填充设置在底护板与液冷板的间隙中,以起到缓冲来自于底护板的外力的作用。并且缓冲装置可以避开液冷板的流道区域,当电池包受到外力挤压时,外力先作用到底护板上,底护板的力通过基板传递到支撑凸条,然后支撑凸条再传递至非流道区域,并且缓冲装置不会接触到流道区域,有效地保护了电池包底部的液冷板及其流道区域。
本公开的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本公开的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本公开,但并不构成对本公开的限制。在附图中:
图1是本公开示例性实施方式提供的电池包的分解图;
图2是本公开示例性实施方式提供的电池包的局部剖视图;
图3是本公开示例性实施方式提供的电池包缓冲装置的结构示意图;
图4是本公开另一示例性实施方式提供的电池包缓冲装置的结构示意图;
图5是图4中A部分的局部放大图;
图6是本公开示例性实施方式提供的电池包缓冲装置的局部结构剖视图;
图7是本公开示例性实施方式提供的电池包缓冲装置的局部平面结构示意图;
图8是本公开再一示例性实施方式提供的电池包缓冲装置的分解结构示意图;
图9是本公开示例性实施方式提供的柔性缓冲层的平面结构示意图;
图10是本公开再一示例性实施方式提供的电池包缓冲装置的局部结构剖视图。
附图标记说明
1    缓冲装置              11    基板
12   支撑凸条              121   倒角结构
122  第一防滑部            13    柔性预紧层
131  第二防滑部            2     液冷板
21   非流道区域            22    流道区域
3    底护板                4     电池模组
5    中间横梁              6     上盖板
7    下箱体边框
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本公开,并不用于限制本公开。
在本公开中,在未作相反说明的情况下,使用的方位词如“上”“下”“顶”“底”“左”“右”是根据本公开提供的电池包及电池包缓冲装置正常安装的情况定义的,具体可参照图2所示的图面方向。“内”“外”是指相应部件轮廓的内和外。本公开中使用的术语如“第一”“第二”等是为了区别一个要素和另一个要素,不具有顺序性和重要性。此外,下面的描述在涉及附图时,不同附图中的同一附图标记表示相同或相似的要素。
参照图1和图2,本公开提供的一种电池包缓冲装置,该缓冲装置1用于接触设置在电池包的底护板3和液冷板2之间。在本公开提供的实施方式中,液冷板2可以为水冷板,液冷板2的底部包括非流道区域21和从非流道区域21朝向底护板3的一侧凸出形成的流道区域22,参照图2,流道区域22从非流道区域21向下凸出以形成腔体,腔体内设置冷却液以对电池模组4进行冷却;缓冲装置1包括与底护板3贴合设置的基板11和设置于基板11的背离底护板3一侧(即图2的上侧)的支撑凸条12,支撑凸条12构造为朝向液冷板2的一侧凸出于基板11,即支撑凸条12设置成从基板11的上表面向上凸出,支撑凸条12用于与非流道区域21接触,并使得流道区域22与缓冲装置1不接触。这里的“不接触”指的是流道区域22既不与支撑凸条12的顶面接触,也不会与支撑凸条12的侧面接触,也如图2中,基板11的上表面与流道区域22的下表面之间存在间隙。
在装配完成后的电池包中,底护板3的顶面会与基板11的底面贴合设置,使得二者之间的接触面积较大,从而可以提高电池包底部抵抗外力变形的能力,当基板11和支撑凸条12由可以挤压变形的柔性材料制成时,基板11在被底护板3挤压后会完全 地与底护板贴合,支撑凸条12的顶面在被挤压后会完全与非流道区域21的底面贴合,从而进一步保证了缓冲装置1的与非流道区域21和底护板3的接触面积以及抵抗变形的能力;支撑凸条12与非流道区域21直接接触,以将缓冲装置1接触设置在底护板3和液冷板2之间,当电池包的底护板3在受外力挤压或撞击时,通过基板11和支撑凸条12可以将外力传递至非流道区域21,以使得底护板3发生形变时不会碰到流道区域22,以防止底护板3变形挤压到流道区域22。同时,由于支撑凸条12的顶面与非流道区域21的底面接触,因而使得支撑凸条12的避开了流道区域22,即支撑凸条12的两侧(参照图2中支撑凸条12的左右两侧)不与流道区域22的两侧(参照图2中流道区域的外轮廓的左右两侧)接触;并且支撑凸条12凸出于基板11的顶面,因而使得基板11的顶面也不与流道区域22的底面接触,由此使得该缓冲装置1完全避开液冷板2的流道区域22,保障在电池包受外力作用时,流道区域22不受挤压,使得流道区域22内用于降低电池包温度的冷却液能够正常流动,达到不影响产品的热管理性能的要求,因此该缓冲装置1对流道区域22也起到一定保护作用。并且,基板11的下表面与底护板3贴合设置,具有较大的接触面积,增加了缓冲装置1和底护板3之间的摩擦力,使得在电池包底部受到外力挤压时,缓冲装置1不易产生滑动,保持在原有位置处,以保证缓冲装置1缓冲来自电池包外部撞击或挤压的能力。
通过上述技术方案,本公开提供的电池包缓冲装置1通过基板11与底护板3贴合设置,基板11上设置支撑凸条12与非流道区域21直接接触,以使得缓冲装置1能够填充设置在底护板3与液冷板2的间隙中,以起到缓冲来自于底护板3的外力的作用。并且缓冲装置1可以避开液冷板2的流道区域22,当电池包受到外力挤压时,外力先作用到底护板3上,底护板3的力通过基板11传递到支撑凸条12,然后支撑凸条12再传递至非流道区域21,并且缓冲装置1不会接触到流道区域22,有效地保护了电池包底部的液冷板2及其流道区域22。
进一步地,根据本公开提供的一些实施例,支撑凸条12的高度可以设置成使得基板11的顶面与流道区域22的底面之间的距离d可以为2mm~5mm,例如可以为3mm,在该距离下可以在各种撞击情况下更好地保护基板11不会接触流道区域22,保护流道区域22不受外力挤压,以避免影响电池包的热管理性能,提高了电池包底部安全防护等级。
参照图2和图3,液冷板2的底部形成有多个间隔设置的流道区域22,支撑凸条12的数量为多个,以支撑在每个流道区域22两侧的非流道区域21,多个支撑凸条12分别沿相应的非流道区域21的延伸方向延伸设置。通过在多个间隔设置的流道区域22两侧的非流道区域21均对应设置有支撑凸条12,以使得当电池包底部受到撞击或挤压时,多个间隔设置的流道区域22均能够受到缓冲装置1的保护,保证了缓冲装置1对于流道区域22的保护效果。在一些实施例中,流道区域22在液冷板2上的布置方式可以为多种,例如沿液冷板2的横向延伸(图2所示沿垂直纸面向内的方向)、沿液冷板2的纵向延伸(图2所示中的左右方向),还可以为直线结构或不规则的曲线或 弯折结构。由于支撑凸条12构造为避开流道区域22而与非流道区域21的构造相匹配,因此,支撑凸条12可以如图3所示分别构造为直线结构或其它不规则的形状等。
参照图2和图6,支撑凸条12的宽度L1(即图2和图6的左右方向的宽度)大于支撑凸条12的高度h(即图2和图6上下方向上的高度)。即支撑凸条12的宽高比大于1,以提高支撑凸条12沿左右方向(图2所示的图面方向)贴合于基板11的接触面积,增强了支撑凸条12设置在基板11上的连接效果,以使得电池包在受到挤压或产生晃动时,支撑凸条12具有足够强度保证自身不会出现左右的晃动,使得缓冲装置1具有足够的承力能力,并保证自身不易发生变形以免接触到流道区域22,以保护流道区域22的安全。这里,由于支撑凸条12的形状会随着非流道区域21的形状改变,因此本公开实施例中,可以根据各个位置处的支撑凸条12的宽度来确定支撑凸条12的高度,即在所有的支撑凸条12的高度一致时,保证该高度可以小于最小宽度处的非流道区域21所对应的支撑凸条12的宽度。
参照图2,每个支撑凸条12的宽度L1小于与支撑凸条12位置对应的非流道区域21的宽度L2(即图2左右方向的宽度)。根据本公开提供的一些实施例,可以设置成支撑凸条12的宽度L1=非流道区域的宽度L2-2mm。这样能够有效避免电池包受到外力挤压或撞击时支撑凸条12的侧面接触到流道区域22,以保护流道区域22的安全,同时,该宽度能够保证支撑凸条12与非流道区域21装配的可行性。
参照图4,根据本公开提供的一个实施例,支撑凸条12还可以包括在延伸方向上间隔设置的分体,即是将图3中示出的支撑凸条12设置成断续的结构。这样,在保证支撑凸条12具有足够支撑能力的前提下,通过设置分体能够起到对缓冲装置1减重的作用,符合轻量化设计原则。
参照图6和图10,支撑凸条12的与基板11连接的边缘处可以形成有倒角结构121。倒角结构121可以形成在支撑凸条12和基板11的交接处,能够有效避免在电池包底部受到外力撞击时,支撑凸条12产生沿图6图面的左右方向的摆动,以保证支撑凸条12的形状保持度,进而保证对非流道区域21的支撑能力,避免支撑凸条12与液冷板2的流道区域22接触,以能更好保护流道区域22。
在本公开提供的缓冲装置1中,支撑凸条12可以安装于基板11,如通过二次发泡等工艺将支撑凸条12和基板11合成一体。或者支撑凸条12可以一体形成于基板11,即多个支撑凸条12与基板11一体成型,方便成型,并且具有足够的强度;通过以上成型方式,增加了缓冲装置1的整体性,使得在电池包底部受到外力挤压时支撑凸条12不易产生转动,或从基板11上脱落,以保证缓冲装置1的缓冲效果,同时也降低了装配难度。
支撑凸条12可以粘接于非流道区域21。在装配动力电池装配下箱体时,可以先通过支撑凸条12或非流道区域21背胶以将缓冲装置1粘贴在非流道区域21,再将底护板3固定在下箱体边框7上,以使得缓冲装置1紧紧地填充在底护板3和液冷板2之间,至此包含缓冲装置1的下箱体结构装配完成,可以用于进行电池包的装配工序中。 支撑凸条12可以通过胶水或双面胶粘贴在非流道区域21,并且基板11可以通过被底护板3挤压的方式紧固在液冷板2与底护板3之间,使得缓冲装置1与底护板3间没有强相关的装配接合结构,当电池包遇到底部撞击问题时,电池包通过更换底护板3和安全检测后便可以继续正常使用。
参照图2、图4、图5以及和图7,支撑凸条12的与非流道区域21接触的表面上可以设置有第一防滑部122。一方面,第一防滑部122能够提高支撑凸条12的用于连接非流道区域21表面的支撑强度,并防止电池包在受到外力撞击或出现晃动时出现支撑不可靠的问题,以提高支撑凸条12和非流道区域21的连接效果;另一方面当电池包存在涉水等情况时,第一防滑部122有利于排出支撑凸条12与非流道区域21接触面的水分,使得该接触面仍然可以保持一定的摩擦力,保证缓冲装置1的对电池包底部的缓冲效果。其中,该第一防滑部122可以设置成从支撑凸条12的顶面凸起的多条间隔的防滑条,如可以设置成类似于车辆轮胎上的纹路。
参照图8和图10,缓冲装置1还可以包括固定在基板11的与底护板3相对的侧面上的柔性预紧层13,柔性预紧层13配置为能够被压缩安装在基板11和底护板3之间。本公开实施例中,基板11和支撑凸条12可以采用弹性模量较高的材质制成,以在受到外力时起到较好的支撑抵抗作用,柔性预紧层可以采用质地软、弹性模量低的材料制成,由于电池包加工过程中液冷板2和底护板3之间存在加工公差,通过增加质地较软的柔性预紧层13,可以消除由加工公差造成的装配间隙,以减少噪声,并且柔性预紧层13受到压力后会压缩,以形成一定的预紧力,提高了柔性预紧层13与底护板3之间的摩擦力,保证可缓冲装置1的安装稳定性。在具有柔性预紧层13的实施例中,可以将基板11的厚度适当变薄,以适应液冷板2与底护板3之间的间隙。
柔性预紧层13可以与基板11粘贴固定。一方面便于柔性预紧层13的安装,另一方面方便对柔性预紧层13以及基板11的更换、检修与维护。在其他实施例中,柔性预紧层还可以通过二次发泡等工艺将柔性预紧层13与基板11合成一体,以提高缓冲装置1的整体性。当具有该柔性预紧层13时,柔性预紧层13还可以具有如上述基板11与底护板3贴合时相同的作用,即通过柔性预紧层13的特性,可以保证在底护板3挤压时完全与底护板3贴合而增大承力面积,以提高缓冲装置1抵抗变形的能力。通过支撑凸条12与非流道区域21粘接,并使柔性预紧层13能够与底护板3接触,并通过安装后的压缩带来的摩擦力保持形状和位置状态,对电池包底部进行保护。需要说明的是,为了适应底护板3和液冷板2之间的间距,当缓冲装置1具有柔性预紧层13时,支撑凸条12与非流道区域21连接时的背胶量少于不具有柔性预紧层13时的背胶量。
参照图9和图10,柔性预紧层13的与底护板3接触的表面设置有第二防滑部131。一方面能够增加柔性预紧层13与底护板3之间的接触效果,以提高缓冲装置1的缓冲效果,以在电池包底部受到撞击时,更好的保护液冷板2的流道区域22。当存在电池包存在涉水等情况时,将接触面的水分挤压至第二防滑部131的防滑纹路中,使得柔 性预紧层13和底护板3之间具有一定的摩擦力。该第二防滑部131的结构可以设置成与上述第一防滑部122(参照图5)的结构相同,这里不再具体描述。
根据本公开提供的一些实施例,缓冲装置1可以由疏水材质制成,以在电池包存在涉水等情况时,将电池包内的水分及时排除,保护电池包。例如,基板11和支撑凸条12可以采用弹性模量较高的EPDM(Ethylene Propylene Diene Monomer三元乙丙橡胶)材质、泡沫聚氨酯、M-PPE(Modified Polypheyleneether聚苯醚)或发泡硅胶等材料,使得电池包在受外力挤压时提供更多抵抗力;柔性预紧层13可以采用质地软、弹性模量低的材料,如EVA(Ethylene Vinyl Acetate乙烯醋酸乙烯酯)材料等。并且由于缓冲装置1采用较软的材质,使得电池包底部在受力时,缓冲装置1具有弹性形变,因而会贴合受力面,增大接触面积,以提高对电池包底部的保护。
本公开的第二个方面,还提供一种电池包,参照图1,该电池包包括电池模组4、设置在电池模组4上部的上盖板6和依次设置在电池模组4下部的液冷板2和底护板3,以及接触设置在液冷板2与底护板3之间的缓冲装置1,缓冲装置1为上述的电池包缓冲装置1。该电池包具有电池包缓冲装置1的所有有益效果,这里不再赘述。
进一步地,参照图1,电池模组4的数量可以为多个,缓冲装置1的数量为多个,以用于分别设置在相应的电池模组所对应的液冷板2的底部位置处。可以结合电池模组4的布置、中间横梁5的布置来确定缓冲装置1分块数量,以适应电池包下边框7内部的安装区域,并提高缓冲装置1与电池包底部的接触效果,以充分发挥缓冲装置1在电池包底部受到外力时的缓冲能够力。例如,在本实施方式中,电池模组4的数量可以为四个,缓冲装置1相应的设置为四块,分别对应电池模组4设置在液冷板2的下部,不仅使得电池包装配方便,降低了装配难度,还能够避免在电池模组4底部设置一整块的缓冲装置1而不能适应电池包内部环境,造成材料的浪费,且难以保证在电池包受到撞击时缓冲装置1的缓冲能力。
本公开的第三个方面,提供一种车辆,包括电池包,该电池包为上述的电池包。该车辆具有上述电池包所有有益效果,这里不再赘述。
以上结合附图详细描述了本公开的优选实施方式,但是,本公开并不限于上述实施方式中的具体细节,在本公开的技术构思范围内,可以对本公开的技术方案进行多种简单变型,这些简单变型均属于本公开的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本公开对各种可能的组合方式不再另行说明。
此外,本公开的各种不同的实施方式之间也可以进行任意组合,只要其不违背本公开的思想,其同样应当视为本公开所公开的内容。

Claims (13)

  1. 一种电池包缓冲装置,其特征在于,所述缓冲装置(1)用于接触设置在电池包的底护板(3)和液冷板(2)之间,所述液冷板(2)的底部包括非流道区域(21)和从所述非流道区域(21)朝向所述底护板(3)的一侧凸出形成的流道区域(22),所述缓冲装置(1)包括与所述底护板(3)贴合设置的基板(11)和设置于所述基板(11)的背离所述底护板(3)一侧的支撑凸条(12),所述支撑凸条(12)构造为朝向所述液冷板(2)的一侧凸出于所述基板(11),用于与所述非流道区域(21)接触,并使得所述流道区域(22)与所述缓冲装置(1)不接触。
  2. 根据权利要求1所述的电池包缓冲装置,其特征在于,所述支撑凸条(12)的高度设置成使得所述基板(11)的顶面与所述流道区域(22)的底面之间的距离d为2mm至5mm。
  3. 根据权利要求1或2所述的电池包缓冲装置,其特征在于,所述液冷板(2)的底部形成有多个间隔设置的所述流道区域(22),所述支撑凸条(12)的数量为多个,以支撑在每个所述流道区域(22)两侧的非流道区域(21),多个所述支撑凸条(12)分别沿相应的非流道区域(21)的延伸方向延伸设置。
  4. 根据权利要求3所述的电池包缓冲装置,其特征在于,所述支撑凸条(12)的宽度L1大于所述支撑凸条(12)的高度h。
  5. 根据权利要求3所述的电池包缓冲装置,其特征在于,每个所述支撑凸条(12)的宽度L1小于与所述支撑凸条(12)位置对应的所述非流道区域(21)的宽度L2。
  6. 根据权利要求3所述的电池包缓冲装置,其特征在于,所述支撑凸条(12)包括在所述延伸方向上间隔设置的分体。
  7. 根据权利要求1所述的电池包缓冲装置,其特征在于,所述支撑凸条(12)的与所述基板(11)连接的边缘处形成有倒角结构(121),以及/或者
    所述支撑凸条(12)安装于所述基板(11),或者所述支撑凸条(12)一体形成于所述基板(11),以及/或者
    所述支撑凸条(12)粘接于所述非流道区域(21)。
  8. 根据权利要求1所述的电池包缓冲装置,其特征在于,所述支撑凸条(12)的与所述非流道区域(21)接触的表面上设置有第一防滑部(122)。
  9. 根据权利要求1所述的电池包缓冲装置,其特征在于,所述缓冲装置(1)还包括固定在所述基板(11)的与所述底护板(3)相对的侧面上的柔性预紧层(13),所述柔性预紧层(13)配置为能够被压缩安装在所述基板(11)和所述底护板(3)之间。
  10. 根据权利要求9所述电池包缓冲装置,其特征在于,所述柔性预紧层(13)的与所述底护板(3)接触的表面设置有第二防滑部(131)。
  11. 一种电池包,其特征在于,包括电池模组(4)、依次设置在所述电池模组(4)下部的液冷板(2)和底护板(3),以及接触设置在所述液冷板(2)与所述底护板(3) 之间的缓冲装置(1),所述缓冲装置(1)为权利要求1-10中任一项所述的电池包缓冲装置。
  12. 根据权利要求11所述的电池包,其特征在于,所述电池模组(4)的数量为多个,所述缓冲装置(1)的数量为多个,以用于分别设置在相应的电池模组(4)所对应的液冷板(2)的底部位置处。
  13. 一种车辆,包括电池包,其特征在于,所述电池包为权利要求11或12中所述的电池包。
PCT/CN2022/085976 2021-04-16 2022-04-08 电池包缓冲装置、电池包及车辆 WO2022218236A1 (zh)

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