WO2020135156A1 - 电池箱 - Google Patents

电池箱 Download PDF

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Publication number
WO2020135156A1
WO2020135156A1 PCT/CN2019/126001 CN2019126001W WO2020135156A1 WO 2020135156 A1 WO2020135156 A1 WO 2020135156A1 CN 2019126001 W CN2019126001 W CN 2019126001W WO 2020135156 A1 WO2020135156 A1 WO 2020135156A1
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WO
WIPO (PCT)
Prior art keywords
heat exchange
exchange plate
top surface
battery
battery box
Prior art date
Application number
PCT/CN2019/126001
Other languages
English (en)
French (fr)
Inventor
王衡
季进清
张文辉
钱木
项延火
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.)
Filing date
Publication date
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
Priority to EP19903870.4A priority Critical patent/EP3799151B1/en
Publication of WO2020135156A1 publication Critical patent/WO2020135156A1/zh
Priority to US17/138,597 priority patent/US20210119279A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
    • H01M6/5038—Heating or cooling of cells or batteries
    • 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

  • This application relates to the field of batteries, and more particularly to a battery box.
  • the battery box includes a lower frame body and a heat exchange plate.
  • the lower frame body and the heat exchange plate form an accommodation space for accommodating a battery module, and the lower frame body includes a plurality of beams.
  • the battery module includes a plurality of arranged batteries.
  • the battery module is supported on the heat exchange plate.
  • the heat exchange plate supports the battery and performs heat exchange with the battery.
  • the battery usually needs to be maintained at a constant temperature range to ensure the stability and stability of the battery's operating temperature.
  • the entire bottom surface of the beam contacts the heat exchange plate, so that there will be heat transfer between the heat exchange plate and the beam of the lower frame, thereby affecting the heat exchange of the heat exchange plate to the battery The effect and the stability and stability of the battery's operating temperature.
  • the object of the present application is to provide a battery box that can reduce the heat exchange between the heat exchange plate and the bottom surface of the internal beam.
  • the present application provides a battery box including: a heat exchange plate; a lower frame body located on the heat exchange plate, the lower frame body including an edge beam and an internal beam, the edge beam is circumferentially closed and Opening up and down, the side beam and the heat exchange plate together form an upwardly open storage space, the internal beam is located in the storage space, and the storage space is divided into sub-accommodation spaces where the battery module is provided.
  • the heat exchange plate is used to support the battery module and Heat exchange is performed with the battery of the battery module, and a part of the bottom surface of the internal beam contacts the top surface of the heat exchange plate in the up-down direction.
  • the bottom surface of the inner beam includes: a first surface, which is in contact with the top surface of the heat exchange plate; a second surface, which is recessed upward from a side of the first surface in a direction intersecting the up and down direction with respect to the first surface , So that the second surface is spaced from the top surface of the heat exchange plate in the up and down direction.
  • the battery box further includes a heat insulating glue, which is filled between the second surface of the bottom surface of the inner beam and the top surface of the heat exchange plate.
  • the bottom surface of the inner beam further includes a third surface, which is recessed upward from the first surface opposite to the direction intersecting the up and down direction with respect to the first surface, so that the third surface and the heat exchange plate The top surfaces of the are spaced up and down.
  • the battery box further includes a heat insulating glue, which is filled between the third surface and the top surface of the heat exchange plate.
  • the entire top surface of the heat exchange plate is flat.
  • the heat exchange plate has a body portion and a bulging portion extending from the body portion, the lower side of the bulging portion is recessed upward relative to the body portion and the upper side of the bulging portion protrudes upward relative to the body portion, the bulging portion
  • the top surface and the inclined surface having the top surface of the constituent part, the inclined surface is located on the side of the top surface in the direction intersecting with the up and down direction, a part of the bottom surface of the inner beam is in contact with the top surface of the bulged portion, and the inclined surface of the bulged portion is replaced with The top surfaces of the hot plates are spaced up and down.
  • the battery box further includes a heat insulating glue, which is filled between the bottom surface of the inner beam and the inclined surface of the bulge.
  • the side surface of the inner beam opposite to the battery is provided with a notch.
  • the internal beam has a receiving cavity above a portion where the bottom surface of the internal beam contacts the top surface of the heat exchange plate
  • the battery box further includes a fixing member, which is located between the bottom surface of the internal beam and the top surface of the heat exchange plate The contact part passes through the heat exchange plate and the internal beam and extends into the receiving cavity, and the portion of the fixing member extending into the receiving cavity is spaced from the wall of the receiving cavity.
  • the beneficial effects of the present application are as follows: a part of the bottom surface of the internal beam contacts the top surface of the heat exchange plate in the up-down direction, reducing the contact area between the bottom surface of the internal beam and the top surface of the heat exchange plate, and reducing the heat exchange plate and the internal beam
  • the heat exchange between the bottom surfaces of the heat transfer plate and the heat exchange plate and the battery module (mainly the battery) has a reduced impact, and improves the stability, stability and controllability of the battery's operating temperature.
  • FIG. 1 is a perspective view of a battery box according to the present application, in which a battery module is shown for clarity.
  • FIG 2 is an assembled perspective view of the battery box according to the present application.
  • FIG. 3 is a plan view of FIG. 2.
  • FIG. 4 is a cross-sectional view of FIG. 3.
  • FIG. 5 is an enlarged view of the circled part of FIG. 4.
  • FIG. 6 is a modification of FIG. 5.
  • FIG. 7 is another view corresponding to FIG. 5, showing another internal beam of the lower frame of the battery box according to the present application.
  • FIG. 8 is a modification of FIG. 7.
  • FIG. 1 is a perspective view of a battery box according to the present application, in which a battery module is shown for clarity.
  • 2 is an assembled perspective view of the battery box according to the present application.
  • FIG. 3 is a plan view of FIG. 2.
  • 4 is a cross-sectional view of FIG. 3.
  • FIG. 5 is an enlarged view of the circled part of FIG. 4.
  • FIG. 6 is a modification of FIG. 5.
  • 7 is another view corresponding to FIG. 5, showing another internal beam of the lower frame of the battery box according to the present application.
  • FIG. 8 is a modification of FIG. 7.
  • the battery box according to the present application includes a heat exchange plate 1 and a lower frame 2.
  • the battery box also includes heat insulation glue 3.
  • the battery box further includes a fixing member 4, an insulation pad 5 and a protective plate 6.
  • the heat exchange plate 1 is used to support the battery module 7 and perform heat exchange with the battery 71 of the battery module 7.
  • the battery 71 may generally include a case and an electrode assembly and an electrolyte housed in the case.
  • the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator.
  • the battery 71 may be a can-type (or hard-shell) battery.
  • the housing includes a top cover and a case assembled with the top cover; or the battery 71 may be a pouch-type (or soft-pack) battery, the housing It is made of encapsulation film (such as aluminum plastic film).
  • the heat exchange plate 1 includes a first plate 14 and a second plate 15, and the second plate 15 is combined with the first plate 14 from below and forms a flow path F for the heat exchange medium to flow, as shown in FIGS. 5 and 6.
  • the first plate 14 and/or the second plate 15 may be stamped and formed.
  • the heat exchange plate 1 is a material with high thermal conductivity, preferably a metal material, and more preferably an aluminum alloy material.
  • the lower frame 2 is located on the heat exchange plate 1.
  • the lower frame 2 includes side beams 21 and inner beams 22.
  • the side beam 21 is circumferentially closed and opened in the vertical direction Z, and the side beam 21 and the heat exchange plate 1 form a storage space that opens upward.
  • the inner beam 22 is located in the storage space, and the storage space is divided into sub-containment spaces R where the battery module 7 is provided. A part of the bottom surface B22 of the inner beam 22 contacts the top surface T11 of the heat exchange plate 1 in the vertical direction Z.
  • a part of the bottom surface B22 of the inner beam 22 contacts the top surface T11 of the heat exchange plate 1 in the vertical direction Z, thereby reducing the contact area between the bottom surface B22 of the inner beam 22 and the top surface T11 of the heat exchange plate 1 and reducing the heat exchange plate 1
  • Both the side beam 21 and the inner beam 22 can be made of metal material, such as aluminum alloy, and die castings or extruded profiles can be used.
  • the side beam 21 and the inner beam 22 may have a cavity (that is, the inner beam 22 has a receiving cavity 225 described later, but the figure does not show the cavity for the side beam 21), that is, they have a type The profile of the cavity.
  • the longitudinal direction of the side beam 21 and the internal beam 22 may be X direction and the lateral direction may be Y direction, or the longitudinal direction may be Y direction and the lateral direction may be X direction, but in this article, the lateral and longitudinal directions are beam structures Its own direction, that is, the local coordinate system, and the XYZ direction of the battery box in FIG. 1 are global coordinate systems, and there is no strict correspondence between the two coordinate systems.
  • the bottom surface B22 of the inner beam 22 includes: a first surface B221 that is in contact with the top surface T11 of the heat exchange plate 1; a second surface B222 that extends from the direction of the first surface B221 that intersects the vertical direction Z One side is recessed upward relative to the first surface B221 so that the second surface B222 is spaced from the top surface T11 of the heat exchange plate 1 in the up-down direction Z.
  • the heat-insulating glue 3 is filled between the second surface B222 of the bottom surface B22 of the inner beam 22 and the top surface T11 of the heat exchange plate 1.
  • the filling of the heat-insulating glue 3 can fill the gap between the second surface B222 of the bottom surface B22 of the inner beam 22 and the top surface T11 of the heat exchange plate 1 seamlessly, thus avoiding heat from the top of the heat exchange plate 1
  • the surface T11 is transferred to the second surface B222 of the bottom surface B22 of the inner beam 22 by heat radiation through air, thereby further reducing the heat exchange between the heat exchange plate 1 and the inner beam 22, thereby further affecting the heat exchange plate 1 and the battery module
  • the influence of heat exchange between 7 (mainly battery 71) is further reduced, and the stability, stability, and controllability of the operating temperature of battery 71 are further improved.
  • the bottom surface B22 of the inner beam 22 further includes a third surface B223 from the first surface B221 opposite to the direction intersecting the up-down direction Z
  • the side is recessed upward with respect to the first surface B221 so that the third surface B223 is spaced from the top surface T11 of the heat exchange plate 1 in the up-down direction Z.
  • the contact area between the bottom surface B22 of the inner beam 22 and the top surface T11 of the heat exchange plate 1 is further reduced, and the heat exchange plate 1 is further reduced
  • the heat exchange between the top surface T11 and the bottom surface B22 of the inner beam 22 further reduces the influence of the heat exchange between the heat exchange plate 1 and the battery module 7 (mainly the battery 71), further improving the operating temperature of the battery 71 Stability, stability and controllability.
  • the heat insulating glue 3 is filled between the third surface B223 and the top surface T11 of the heat exchange plate 1.
  • the filling of the heat-insulating glue 3 can fill the gap between the third surface B223 of the bottom surface B22 of the inner beam 22 and the top surface T11 of the heat exchange plate 1 seamlessly, thus avoiding the heat from the heat exchange plate
  • the top surface T11 of 1 is transferred to the third surface B223 of the bottom surface B22 of the inner beam 22 through heat radiation through air, thereby further reducing the heat exchange between the heat exchange plate 1 and the inner beam 22, and further
  • the influence of the heat exchange between the battery modules 7 (mainly the battery 71) is further reduced, and the stability, stability, and controllability of the operating temperature of the battery 71 are further improved.
  • the entire top surface T11 of the heat exchange plate 1 is flat, thereby improving the flatness of heat exchange with the battery 1 of the battery module 7 and improving the uniformity of heat exchange.
  • the second surface B222 and the third surface B223 may or may not form a ring, which may be based on the control of heat exchange.
  • the heat exchange plate 1 has a body portion 12 and a bulging portion 13 extending from the body portion 12, the lower side of the bulging portion 13 is recessed upward relative to the body portion 12 and the bulging portion 13
  • the upper side protrudes upward relative to the main body portion 12, and the bulged portion 13 has a top surface 131 constituting a part of the top surface T11 and an inclined surface 132, the inclined surface 132 is located on the side of the top surface 131 in a direction intersecting the vertical direction Z, and the inner beam 22 A part of the bottom surface B22 is in contact with the top surface 131 of the bulging portion 13, and the inclined surface 132 of the bulging portion 13 is spaced from the top surface T11 of the heat exchange plate 1 in the vertical direction Z.
  • a part of the bottom surface B22 of the inner beam 22 is in contact with the top surface 131 of the bulging portion 13 and the inclined surface 132 of the bulging portion 13 is spaced in the vertical direction Z from the top surface T11 of the heat exchange plate 1 to reduce the bottom surface of the inner beam 22
  • the contact area between B22 and the top surface T11 of the heat exchange plate 1 reduces the heat exchange between the heat exchange plate 1 and the bottom surface B22 of the inner beam 22, and then the heat exchange plate 1 and the battery module 7 (mainly the battery 71)
  • the influence of the heat exchange between them is reduced, and the stability, stability, and controllability of the operating temperature of the battery 71 are improved.
  • the provision of the bulging portion 13 is also beneficial to enhance the cushioning performance of the internal beam 22 against external impacts.
  • the heat-insulating glue 3 is filled between the bottom surface B22 of the inner beam 22 and the inclined surface 132 of the bulging portion 13.
  • the filling of the heat-insulating glue 3 can fill the gap between the bottom surface B22 of the inner beam 22 and the inclined surface 132 of the bulging portion 13 seamlessly, thus avoiding the heat from the bulging portion of the heat exchange plate 1
  • the inclined surface 132 of 13 is transferred to the bottom surface B22 of the inner beam 22 by heat radiation, thereby further reducing the heat exchange between the heat exchange plate 1 and the inner beam 22, and further affecting the heat exchange plate 1 and the battery module 7 ( Mainly, the influence of heat exchange between the batteries 71) is further reduced, and the stability, stability, and controllability of the operating temperature of the batteries 71 are further improved.
  • the bottom surface B22 of the inner beam 22 is similar to the case of FIG. 6; in the example of FIG. 8, the bottom surface B22 of the inner beam 22 is flat.
  • the side surface 224 of the inner beam 22 opposite to the battery is provided with a notch 224 a.
  • the provision of the notch portion 224a can reduce the contact area when the side of the battery module 7 is in contact with the inner beam 22 under impact vibration, reducing the degree of accidental heat exchange.
  • the notch portion 224a can also reduce the weight of the inner beam 22, which contributes to the weight reduction of the battery case.
  • the inner beam 22 has a receiving cavity 225 located above the portion where the bottom surface B22 of the inner beam 22 contacts the top surface T11 of the heat exchange plate 1.
  • the fixing member 4 passes through the heat exchange plate 1 and the inner beam 22 at a portion where the bottom surface B22 of the inner beam 22 contacts the top surface T11 of the heat exchange plate 1 and extends into the receiving cavity 225, and the portion of the fixing member 4 extending into the receiving cavity 225
  • the walls of the receiving cavity 225 are spaced apart. In this way, the portion of the fixing member 4 that protrudes into the receiving cavity 225 is prevented from contacting the wall of the receiving cavity 225, thereby avoiding increasing the heat exchange area between the internal beam 22 and the heat exchange plate 1 via the fixing member 4.
  • the material of the heat-insulating glue 3 can be any suitable material, such as polyurethane heat-insulating glue and heat-insulating epoxy glue.
  • the fixing member 4 is used to fix the heat exchange plate 21 to the lower frame 1.
  • the fixing member 4 can take any suitable form, such as rivets or a combination of bolts and nuts, screws.
  • the material of the fixing member 4 is preferably a material with low thermal conductivity.
  • the heat insulation pad 5 is disposed below the heat exchange plate 1, as shown in FIG. By the arrangement of the heat insulation pad 5, at least the heat transfer in the downward direction of the heat exchange plate 1 is blocked, and then the battery 71 of the battery module 7 is kept warm.
  • the material of the heat insulation pad 5 may be heat insulation cotton or foam.
  • the protective plate 6 is supported by the thermal insulation pad 5 and the heat exchange plate 1 from below, as shown in FIG. 1.
  • the protective plate 6 protects the heat exchange plate 6 from being damaged by external force and fails due to external force impact (for example, flying stone).
  • the material of the protective plate 6 is preferably a material with strong impact resistance, such as aluminum alloy, stainless steel, high-strength steel, hot-dip galvanized bidirectional DP high-strength alloy steel, and the like.

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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)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请提供了一种电池箱，其包括：换热板；下框体，位于换热板上，下框体包括边部梁和内部梁，边部梁周向封闭且在上下方向开口，边部梁与换热板一起形成向上开口的收容空间，内部梁位于收容空间内，将收容空间分割成设置电池模组的子收容空间，换热板用于支撑电池模组并与电池模组的电池进行热交换，内部梁的底面的一部分与换热板的顶面在上下方向上接触。通过内部梁的底面的一部分与换热板的顶面在上下方向上接触，减少内部梁的底面与换热板的顶面的接触面积，减少换热板与内部梁的底面之间的热交换，进而对换热板与电池模组(主要是电池)之间的热交换的影响降低，改善电池的工作温度的稳定性、恒定性以及可控性。

Description

电池箱 技术领域
本申请涉及电池领域，更具体地涉及一种电池箱。
背景技术
在电池领域中，电池箱包括下框体以及换热板，下框体以及换热板形成收容电池模组的收容空间，下框体包括多个梁。电池模组包括多个排列的电池，电池模组支撑在换热板上，换热板支撑电池并与电池进行热交换。
电池通常需要维持在恒定的温度范围下，以保证电池的工作温度的稳定性和恒定性。
然而，由于换热板固定于下框体的梁上，梁的整个底面接触换热板，这样换热板与下框体的梁会存在着热传递，从而影响换热板对电池的换热效果以及电池的工作温度的稳定性和恒定性。
发明内容
鉴于现有技术中存在的问题，本申请的目的在于提供一种电池箱，其能减少换热板与内部梁的底面之间的热交换。
为了实现上述目的，本申请提供了一种电池箱，其包括：换热板；下框体，位于换热板上，下框体包括边部梁和内部梁，边部梁周向封闭且在上下方向开口，边部梁与换热板一起形成向上开口的收容空间，内部梁位于收容空间内，将收容空间分割成设置电池模组的子收容空间，换热板用于支撑电池模组并与电池模组的电池进行热交换，内部梁的底面的一部分与换热板的顶面在上下方向上接触。
在一实施例中，内部梁的底面包括：第一面，与换热板的顶面接触；第二面，从第一面的与上下方向相交的方向的一侧相对第一面向上凹入，以使第二面与换热板的顶面在上下方向上间隔开。
在一实施例中，电池箱还包括隔热胶，隔热胶填充在内部梁的底面的第 二面与换热板的顶面之间。
在一实施例中，内部梁的底面还包括第三面，从第一面的与上下方向相交的方向的相反的另一侧相对第一面向上凹入，以使第三面与换热板的顶面在上下方向上间隔开。
在一实施例中，电池箱还包括隔热胶，隔热胶填充在第三面与换热板的顶面之间。
在一实施例中，换热板的顶面整体为平面。
在一实施例中，换热板具有主体部以及从主体部延伸的鼓出部，鼓出部的下侧相对主体部向上凹入且鼓出部的上侧相对主体部向上突出，鼓出部具有构成部分顶面的顶表面以及倾斜面，倾斜面沿与上下方向相交的方向位于顶表面侧方，内部梁的底面的一部分与鼓出部的顶表面接触，鼓出部的倾斜面与换热板的顶面在上下方向间隔开。
在一实施例中，电池箱还包括隔热胶，隔热胶填充在内部梁的底面和鼓出部的倾斜面之间。
在一实施例中，内部梁的与电池相对的侧表面设有缺口部。
在一实施例中，内部梁具有位于内部梁的底面与换热板的顶面接触的部位上方的收容腔，电池箱还包括固定件，固定件在内部梁的底面与换热板的顶面接触的部位穿过换热板和内部梁并伸入收容腔内，固定件伸入收容腔的部分与收容腔的壁间隔开。
本申请的有益效果如下：通过内部梁的底面的一部分与换热板的顶面在上下方向上接触，减少内部梁的底面与换热板的顶面的接触面积，减少换热板与内部梁的底面之间的热交换，进而对换热板与电池模组(主要是电池)之间的热交换的影响降低，改善电池的工作温度的稳定性、恒定性以及可控性。
附图说明
图1是根据本申请的电池箱的立体图，其中为了清楚起见，示出了电池模组。
图2根据本申请的电池箱的组装立体图。
图3是图2的俯视图。
图4是图3的剖视图。
图5是图4的圆圈部分的放大图。
图6是图5的变形例。
图7是与图5对应的另一视图，示出根据本申请的电池箱的下框体的另一内部梁。
图8是图7的变形例。
其中，附图标记说明如下：
X左右方向                    22内部梁
Y前后方向                    B22底面
Z上下方向                    B221第一面
1换热板                      B222第二面
T11顶面                      B223第三面
12主体部                     224侧表面
121上表面                    224a缺口部
13鼓出部                     225收容腔
131顶表面                    R子收容空间
132倾斜面                    3隔热胶
14第一板                     4固定件
15第二板                     5保温垫
F流道                        6防护板
2下框体                      7电池模组
21边部梁                     71电池
具体实施方式
附图示出本申请的实施例，且将理解的是，所公开的实施例仅仅是本申请的示例，本申请可以以各种形式实施，因此，本文公开的具体细节不应被解释为限制，而是仅作为权利要求的基础且作为表示性的基础用于教导本领域普通技术人员以各种方式实施本申请。
此外，诸如上、下、左、右、前和后等用于说明实施例中的各构件的操作和构造的指示方向的表述不是绝对的而是相对的，且尽管各构件处于图中 所示的位置时这些指示是恰当的，但是当这些位置改变时，这些方向应有不同的解释，以对应所述改变。
图1是根据本申请的电池箱的立体图，其中为了清楚起见，示出了电池模组。图2根据本申请的电池箱的组装立体图。图3是图2的俯视图。图4是图3的剖视图。图5是图4的圆圈部分的放大图。图6是图5的变形例。图7是与图5对应的另一视图，示出根据本申请的电池箱的下框体的另一内部梁。图8是图7的变形例。
根据本申请的电池箱包括换热板1以及下框体2。电池箱还包括隔热胶3。电池箱还包括固定件4、保温垫5以及防护板6。
换热板1用于支撑电池模组7并与电池模组7的电池71进行热交换。电池71可通常包括壳体以及收容于壳体内的电极组件和电解质。电极组件包括正极片、负极片和隔离膜。电池71可以为罐型(或硬壳)电池，如图1所示相应地，壳体包括顶盖以及与顶盖装配的外壳；或者电池71可以为袋型(或软包)电池，壳体由封装膜(例如铝塑膜)制成。换热板1包括第一板14和第二板15，第二板15从下方与第一板14结合并形成供换热介质流动的流道F，如图5和图6所示。第一板14和/或第二板15可冲压成型。为了提高热交换的效果，换热板1为导热性高的材质，优选金属材料，进一步优选铝合金材质。
下框体2位于换热板1上。下框体2包括边部梁21和内部梁22。边部梁21周向封闭且在上下方向Z开口，边部梁21与换热板1一起形成向上开口的收容空间。内部梁22位于收容空间内，将收容空间分割成设置电池模组7的子收容空间R，内部梁22的底面B22的一部分与换热板1的顶面T11在上下方向Z上接触。通过内部梁22的底面B22的一部分与换热板1的顶面T11在上下方向Z上接触，减少内部梁22的底面B22与换热板1的顶面T11的接触面积，减少换热板1与内部梁22的底面B22之间的热交换，进而对换热板1与电池模组7(主要是电池71)之间的热交换的影响降低，改善电池71的工作温度的稳定性、恒定性以及可控性。
边部梁21和内部梁22均可为金属材质，例如铝合金，可以采用压铸件或挤出型材。为了减重，边部梁21和内部梁22可以具有型腔(即针对内部梁22具有后述的收容腔225，但图未示出针对边部梁21的型腔)，即它们 为具有型腔的型材。注意的是，边部梁21和内部梁22各自的纵向可以为X方向而横向可以为Y方向，或者纵向可以为Y方向而横向可以为X方向，但是在本文中，横向和纵向是梁结构自身的方向，即局部坐标系，其与图1中的电池箱的X-Y-Z方向为整体坐标系，两个坐标系之间不存在严格的对应关系。
在图5的示例中，内部梁22的底面B22包括：第一面B221，与换热板1的顶面T11接触；第二面B222，从第一面B221的与上下方向Z相交的方向的一侧相对第一面B221向上凹入，以使第二面B222与换热板1的顶面T11在上下方向Z上间隔开。
进一步地，在图5的示例中，隔热胶3填充在内部梁22的底面B22的第二面B222与换热板1的顶面T11之间。隔热胶3的填充可以将在内部梁22的底面B22的第二面B222与换热板1的顶面T11之间的间隔无缝隙地填充，这样就避免了热从换热板1的顶面T11通过热辐射并经由空气传递到内部梁22的底面B22的第二面B222，由此进一步减少换热板1与内部梁22之间的热交换，进而对换热板1与电池模组7(主要是电池71)之间的热交换的影响进一步降低，进一步改善电池71的工作温度的稳定性、恒定性以及可控性。
在图6的示例中，在图5所示的实施例的基础上，内部梁22的底面B22还包括第三面B223，从第一面B221的与上下方向Z相交的方向的相反的另一侧相对第一面B221向上凹入，以使第三面B223与换热板1的顶面T11在上下方向Z上间隔开。通过第三面B223与换热板1的顶面T11在上下方向Z上间隔开，进一步减少内部梁22的底面B22与换热板1的顶面T11的接触面积，进一步减少换热板1的顶面T11与内部梁22的底面B22之间的热交换，进而对换热板1与电池模组7(主要是电池71)之间的热交换的影响进一步降低，进一步改善电池71的工作温度的稳定性、恒定性以及可控性。
进一步地，在图6所示的示例中，隔热胶3填充在第三面B223与换热板1的顶面T11之间。同样地，隔热胶3的填充可以将在内部梁22的底面B22的第三面B223与换热板1的顶面T11之间的间隔无缝隙地填充，这样就避免了热从换热板1的顶面T11通过热辐射并经由空气传递到内部梁22 的底面B22的第三面B223，由此进一步减少换热板1与内部梁22之间的热交换，进而对换热板1与电池模组7(主要是电池71)之间的热交换的影响进一步降低，进一步改善电池71的工作温度的稳定性、恒定性以及可控性。
在图5和图6的示例中，换热板1的顶面T11整体为平面，从而提高与电池模组7的电池1的换热的平面度，提高换热均匀性。第二面B222和第三面B223可以形成环形，也可以不形成环形，可以依据热交换的控制为准。
在图7和图8的示例中，换热板1具有主体部12以及从主体部12延伸的鼓出部13，鼓出部13的下侧相对主体部12向上凹入且鼓出部13的上侧相对主体部12向上突出，鼓出部13具有构成部分顶面T11的顶表面131以及倾斜面132，倾斜面132沿与上下方向Z相交的方向位于顶表面131侧方，内部梁22的底面B22的一部分与鼓出部13的顶表面131接触，鼓出部13的倾斜面132与换热板1的顶面T11在上下方向Z间隔开。通过内部梁22的底面B22的一部分与鼓出部13的顶表面131接触而鼓出部13的倾斜面132与换热板1的顶面T11在上下方向Z间隔开，减少内部梁22的底面B22与换热板1的顶面T11的接触面积，减少换热板1与内部梁22的底面B22之间的热交换，进而对换热板1与电池模组7(主要是电池71)之间的热交换的影响降低，改善电池71的工作温度的稳定性、恒定性以及可控性。此外，鼓出部13的设置还有利于增强内部梁22对外部冲击的缓冲性能。
进一步地，在图7和图8的示例中，隔热胶3填充在内部梁22的底面B22和鼓出部13的倾斜面132之间。同样地，隔热胶3的填充可以将在内部梁22的底面B22与鼓出部13的倾斜面132之间的间隔无缝隙地填充，这样就避免了热从换热板1的鼓出部13的倾斜面132通过热辐射并经由空气传递到内部梁22的底面B22，由此进一步减少换热板1与内部梁22之间的热交换，进而对换热板1与电池模组7(主要是电池71)之间的热交换的影响进一步降低，进一步改善电池71的工作温度的稳定性、恒定性以及可控性。
在图7的示例中，内部梁22的底面B22与图6的情况类似；在图8的示例中，内部梁22的底面B22为平面。
在图7和图8的示例中，内部梁22的与电池相对的侧表面224设有缺口部224a。缺口部224a的设置能够降低在电池模组7的侧面在冲击振动情 况下与内部梁22接触时的接触面积，减低意外热交换的程度。此外，缺口部224a还可以使得内部梁22减重，有助于电池箱的轻量化。
在图5至图8的示例中，内部梁22具有位于内部梁22的底面B22与换热板1的顶面T11接触的部位上方的收容腔225。固定件4在内部梁22的底面B22与换热板1的顶面T11接触的部位穿过换热板1和内部梁22并伸入收容腔225内，固定件4伸入收容腔225的部分收容腔225的壁间隔开。由此避免固定件4伸入收容腔225的部分与收容腔225的壁接触，进而避免经由固定件4增大内部梁22与换热板1的换热面积。
隔热胶3的材料可以选用任何合适的材料，例如聚氨酯隔热胶、隔热环氧胶等。
固定件4用于将换热板21固定于下框体1。固定件4可以采用任何合适的形式，例如铆钉或螺栓和螺母的组合、螺钉。固定件4的材料优选导热性能低的材料。
保温垫5设置在换热板1的下方，如图1所示。通过保温垫5的设置，至少在换热板1的向下方向的热传递被阻断，进而对电池模组7的电池71进行保温。保温垫5的材料可为保温棉、泡棉等。
防护板6从下方支撑在保温垫5以及换热板1，如图1所示。防护板6在外力冲击(例如飞石)下，保护换热板6不受外力破坏而失效。防护板6的材料优选抗冲击强的材料，例如铝合金、不锈钢、高强度钢、热镀锌双向DP高强度合金钢等。
上面详细的说明描述多个示范性实施例，但本文不意欲限制到明确公开的组合。因此，除非另有说明，本文所公开的各种特征可以组合在一起而形成出于简明目的而未示出的多个另外组合。

Claims (10)

  1. 一种电池箱，其特征在于，包括：
    换热板(1)；
    下框体(2)，位于换热板(1)上，下框体(2)包括边部梁(21)和内部梁(22)，边部梁(21)周向封闭且在上下方向(Z)开口，边部梁(21)与换热板(1)一起形成向上开口的收容空间，内部梁(22)位于收容空间内，将收容空间分割成设置电池模组(7)的子收容空间(R)，换热板(1)用于支撑电池模组(7)并与电池模组(7)的电池(71)进行热交换，内部梁(22)的底面(B22)的一部分与换热板(1)的顶面(T11)在上下方向(Z)上接触。
  2. 根据权利要求1所述的电池箱，其特征在于，内部梁(22)的底面(B22)包括：
    第一面(B221)，与换热板(1)的顶面(T11)接触；
    第二面(B222)，从第一面(B221)的与上下方向(Z)相交的方向的一侧相对第一面(B221)向上凹入，以使第二面(B222)与换热板(1)的顶面(T11)在上下方向(Z)上间隔开。
  3. 根据权利要求2所述的电池箱，其特征在于，电池箱还包括隔热胶(3)，隔热胶(3)填充在内部梁(22)的底面(B22)的第二面(B222)与换热板(1)的顶面(T11)之间。
  4. 根据权利要求2所述的电池箱，其特征在于，内部梁(22)的底面(B22)还包括第三面(B223)，从第一面(B221)的与上下方向(Z)相交的方向的相反的另一侧相对第一面(B221)向上凹入，以使第三面(B223)与换热板(1)的顶面(T11)在上下方向(Z)上间隔开。
  5. 根据权利要求4所述的电池箱，其特征在于，电池箱还包括隔热胶(3)，隔热胶(3)填充在第三面(B223)与换热板(1)的顶面(T11)之间。
  6. 根据权利要求1-5中任一项所述的电池箱，其特征在于，换热板(1)的顶面(T11)整体为平面。
  7. 根据权利要求1-5中任一项所述的电池箱，其特征在于，
    换热板(1)具有主体部(12)以及从主体部(12)延伸的鼓出部(13)，鼓出部(13)的下侧相对主体部(12)向上凹入且鼓出部(13)的上侧相对主体部(12)向上突出，鼓出部(13)具有构成部分顶面(T11)的顶表面(131)以及倾斜面(132)，倾斜面(132)沿与上下方向(Z)相交的方向位于顶表面(131)侧方，内部梁(22)的底面(B22)的一部分与鼓出部(13)的顶表面(131)接触，鼓出部(13)的倾斜面(132)与换热板(1)的顶面(T11)在上下方向(Z)间隔开。
  8. 根据权利要求7所述的电池箱，其特征在于，电池箱还包括隔热胶(3)，隔热胶(3)填充在内部梁(22)的底面(B22)和鼓出部(13)的倾斜面(132)之间。
  9. 根据权利要求1所述的电池箱，其特征在于，内部梁(22)的与电池相对的侧表面(224)设有缺口部(224a)。
  10. 根据权利要求1所述的电池箱，其特征在于，内部梁(22)具有位于内部梁(22)的底面(B22)与换热板(1)的顶面(T11)接触的部位上方的收容腔(225)，
    电池箱还包括固定件(4)，固定件(4)在内部梁(22)的底面(B22)与换热板(1)的顶面(T11)接触的部位穿过换热板(1)和内部梁(22)并伸入收容腔(225)内，固定件(4)伸入收容腔(225)的部分与收容腔(225)的壁间隔开。
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US20210119279A1 (en) 2021-04-22
EP3799151A4 (en) 2021-10-13

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