WO2020133763A1 - 电池箱 - Google Patents

电池箱 Download PDF

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Publication number
WO2020133763A1
WO2020133763A1 PCT/CN2019/079678 CN2019079678W WO2020133763A1 WO 2020133763 A1 WO2020133763 A1 WO 2020133763A1 CN 2019079678 W CN2019079678 W CN 2019079678W WO 2020133763 A1 WO2020133763 A1 WO 2020133763A1
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WO
WIPO (PCT)
Prior art keywords
flow path
lug
plate
bottom wall
recess
Prior art date
Application number
PCT/CN2019/079678
Other languages
English (en)
French (fr)
Inventor
姜利文
方伍梅
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 EP19905735.7A priority Critical patent/EP3886201B1/en
Publication of WO2020133763A1 publication Critical patent/WO2020133763A1/zh
Priority to US17/355,682 priority patent/US20210320349A1/en

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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
    • 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
    • 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
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • 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
    • 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 relates to the field of batteries, in particular to a battery box.
  • the heat exchange medium in this pipe also has a good heat exchange effect in the front section.
  • the heat exchange The medium has absorbed a certain amount of heat, and the heat exchange effect is greatly reduced compared to the previous stage, resulting in unevenness and inconsistency in the temperature of the battery box.
  • an object of the present invention is to provide a battery box that can integrate a heat exchange system on the box body, reducing overall weight and manufacturing cost.
  • another object of the present invention is to provide a battery box, which can place the heat exchange flow path outside the box body, and completely prevent the risk of damage to components in the battery box caused by leakage.
  • still another object of the present invention is to provide a battery box that can increase the heat exchange effect.
  • the present invention provides a battery case including a lower case
  • the lower case includes: a first plate, including: a bottom wall; a peripheral wall connected to the peripheral edge of the bottom wall and extending upward, the bottom wall and the peripheral wall Together, they form a storage space that opens upward in the height direction; the second plate is fixed to the bottom wall from below and joined to the bottom wall to form an inflow path, an outflow path, and a main flow path that communicates with the inflow path and the outflow path
  • the main flow path includes a first main flow path, a second main flow path, and multiple parallel shunt paths connected to the first main flow path and the second main flow path.
  • the second plate includes a plate body, the plate body includes: a first recessed portion, which is recessed downward from a side of the second plate facing the first plate; a peripheral portion, connected to the end of the first recessed portion and surrounding The first concave portions extend outward; a plurality of intermediate convex portions are arranged at intervals in the longitudinal direction, and each of the intermediate convex portions is recessed upward from the side of the first concave portion away from the bottom wall and protrudes toward the bottom wall, and each of the intermediate convex portions
  • the peripheral edges of a concave portion are spaced apart; wherein, the peripheral edge portion of the plate body and the plurality of intermediate convex portions are respectively sealingly connected to the bottom wall of the first plate, the first concave portion is spaced from the bottom wall and forms a first main flow path, a second The main flow path and a plurality of parallel shunt paths connected to the first main flow path and the second main flow path.
  • the second plate further includes: a first lug and a second lug, which are longitudinally connected to one side of the plate body and spaced apart in the lateral direction; the first lug is provided with: a first lug edge portion , Connected to the peripheral edge of the plate; and the second recess, which is recessed downward by the first lug edge and communicates with the first recess; the second lug is provided with: a second lug edge, connected to the plate The peripheral portion of the; and the third recessed portion, which is recessed downward by the second lug edge portion and communicates with the first recessed portion; wherein, the first lug edge portion of the first lug and the second lug of the second lug The rims are sealed and connected to the bottom wall respectively.
  • the second recess of the first lug is spaced apart from the bottom wall and forms an inflow path communicating with the first main flow path; the third recess of the second lug is spaced apart from the bottom wall and An outlet flow path communicating with the second main flow path is formed.
  • the plate body further includes: a partition convex portion, which is recessed upward from the side of the first concave portion away from the bottom wall and protrudes toward the bottom wall, and the partition convex portion is connected to the adjacent adjacent first lug and second lug
  • the middle convex portion extends to the peripheral edge portion between the first lug and the second lug
  • the separation convex portion is hermetically connected with the bottom wall of the first plate to divide the flow path adjacent to the inlet liquid flow path and the outlet liquid flow path The road is blocked at the position separating the convex portions.
  • the bottom wall of the first plate is further provided with: a fourth recess, which is recessed upward from the side of the bottom wall facing the second plate and protrudes to the opposite side, and the outline of the fourth recess is the same as the second The outer contours of the plates match, and the second plate is embedded in the fourth recess of the bottom wall.
  • the peripheral portion of the plate body of the second plate, the plurality of intermediate convex portions, the partition convex portions, the first lug edge portion of the first lug, and the second lug edge of the second lug The parts are sealedly connected to the inner top surface of the fourth concave part of the bottom wall, the first concave part and the fourth concave part form a first main flow path, a plurality of parallel shunt paths, and a second main flow path; the second of the first lug The recessed portion and the fourth recessed portion form an inflow path communicating with the first main flow path; the third recessed portion and the fourth recessed portion of the second lug form an exit flow path communicating with the second main path.
  • peripheral portion of the plate body of the second plate, the plurality of intermediate convex portions, the partition convex portions, the first lug edge portion of the first lug, and the second lug edge of the second lug are connected to the fourth recesses via an adhesive seal.
  • the periphery of the second plate is welded to the periphery of the fourth recess.
  • the second plate is formed by integral stamping.
  • the battery box further includes: a battery pack, which is accommodated in the accommodation space of the first plate, and the lower surface of the battery pack is in thermally conductive contact with the bottom wall of the first plate.
  • the beneficial effects of the present invention are as follows:
  • the first plate and the second plate are joined to form a lower box body and form a heat exchange flow path, the box body and the heat exchange flow path are integrated into one body, reducing the overall weight And manufacturing cost;
  • the external design of the heat exchange flow path effectively avoids the influence of the heat exchange flow path leakage on the battery and other components inside the battery box, and improves the safety of the battery box; moreover, the first board
  • the heat exchange path of the main flow path formed by joining with the second plate is short and the heat exchange is uniform, thereby increasing the heat exchange effect.
  • FIG. 1 is an exploded perspective view of a battery box according to the present invention.
  • FIG. 2 is a view of part of the component parts of FIG. 1.
  • FIG. 3 is a bottom perspective view of the lower case in FIG. 2.
  • Fig. 4 is an exploded view of Fig. 3.
  • FIG. 5 is a bottom perspective view of the first plate of FIG. 3.
  • FIG. 6 is an exploded view of another embodiment of the lower case similar to FIG. 4.
  • FIG. 7 is an exploded view of another embodiment of the lower case similar to FIG. 4.
  • expressions such as portrait, height, and landscape directions used to explain the operation and configuration of the components of the battery box in this embodiment are not absolute but relative, and although the components of the battery box are These indications are appropriate for the positions shown in, but when these positions change, these directions should have different interpretations to correspond to the changes.
  • FIG. 1 is an exploded perspective view of a battery box according to the present invention.
  • FIG. 2 is a view of part of the component parts of FIG. 1.
  • the battery case according to the present invention includes: a lower case 1; a battery pack 2, housed in the lower case 1; and a protective plate 3, provided below the lower case 1.
  • FIG. 3 is a bottom perspective view of the lower case in FIG. 2.
  • Fig. 4 is an exploded view of Fig. 3.
  • FIG. 5 is a bottom perspective view of the first plate 11 of FIG. 3.
  • the lower case 1 includes a first plate 11 and a second plate 12, and the second plate 12 is fixed below the first plate 11.
  • the first plate 11 includes a bottom wall 111 and a peripheral wall 112 connected to the peripheral edge of the bottom wall 111 and extending upward.
  • the bottom wall 111 and the peripheral wall 112 together form a receiving space 114 that opens upward in the height direction H.
  • the lower case further includes a flange 113 connected to the end of the peripheral wall 112 and extending outside the lower case 1, and the bottom wall 111, the peripheral wall 112 and the flange 113 are integrally formed by stamping.
  • the thickness of the first plate 11 is 0.6 mm-1.2 mm, preferably 0.8 mm.
  • the battery pack 2 is accommodated in the accommodation space 114 of the first plate 11, and the lower surface of the battery pack 2 is in thermal contact with the bottom wall 111 of the first plate 11.
  • the battery pack 2 may be in thermal contact with the bottom wall 111 of the first plate 11 through a thermal pad, a thermal paste, etc., so that the main flow path F3 can heat or cool the battery pack 2.
  • the second plate 12 is fixed to the bottom wall 111 from below and joined to the bottom wall 111 to form an inlet flow path F1, an outlet flow path F2, and a main flow path F3 communicating with the inlet flow path F1 and the outlet flow path F2.
  • F3 includes a first main flow path F31, a second main flow path F32, and a plurality of parallel shunt paths F33 communicating with the first main flow path F31 and the second main flow path F32.
  • the bottom wall 111 and the peripheral wall 112 of the first plate 11 together form an accommodation space 114 that opens upward in the height direction H, and the second plate 12 is fixed to the bottom wall 111 from below and joined to the bottom wall 111 to form a heat exchange flow path (inlet flow Path F1, outlet flow path F2, main flow path F3), the integration of the lower box 1 and the heat exchange system is realized, the overall weight of the battery box is reduced, and the manufacturing cost is reduced; in addition, the heat exchange flow path is formed in the lower box
  • the outside of the body 1 avoids the influence of the dews of each flow path on the battery and other components inside the box, and improves the safety of the battery box; furthermore, the main flow path F3 formed includes the first main flow path F31 and the second main flow path The flow path F32 and a plurality of parallel shunt paths F33 connected to the first main flow path F31 and the second main flow path F32. This flow path is shorter than the S-shaped path in the known technology, and the flow path is improved.
  • the protective plate 3 is disposed below the second plate 12 to protect the main flow path F3 of the lower case 1 from below, protect the lower case 1 from the damage of the bottom, and at the same time play a role of heat preservation to prevent heat from spreading to external.
  • the second plate 12 and the bottom wall 111 of the first plate 11 have various combinations to form the inlet liquid flow path F1, the outlet liquid flow path F2, and the main flow path F3 communicating with the inlet liquid flow path F1 and the outlet liquid flow path F2. Examples of different formation methods are described below.
  • the bottom wall 111 of the first plate 11 is provided with a plurality of protrusions 111P, and the protrusion 111P is recessed downward from the side of the bottom wall 111 facing away from the second plate 12 And protrude toward the second plate 12.
  • the bottom wall 111 of the first plate 11 is further provided with: a fourth recess 111R, which is recessed upward from the side of the bottom wall 111 facing the second plate 12 and protrudes to the opposite side, and the outline of the fourth recess 111R is the same as the second
  • the outer contour of the plate 12 matches, and the second plate 12 is embedded in the fourth recess 111R of the bottom wall 111.
  • the embedded connection reduces the joint height of the first board 11 and the second board 12 in the height direction H, thereby reducing the overall height of the battery box and increasing the energy density of the battery box.
  • the peripheral edge of the second plate 12 is welded to the peripheral edge of the fourth recess 111R.
  • the provision of the fourth concave portion 111R can increase the space for accommodating the heat exchange medium and improve the heat exchange efficiency of the battery box; and during the assembly process of the first plate 11 and the second plate 12, the fourth concave portion 111R can make the second plate 12 accurately Assembled in place.
  • the second board 12 includes a board body B.
  • the second plate 12 further includes: a first lug E1 and a second lug E2 connected to one side of the plate body B in the longitudinal direction L and spaced apart in the lateral direction T.
  • the second plate 12 is formed by integral stamping.
  • the plate body B includes: a first concave portion B2, which is recessed downward from the side of the second plate 12 facing the first plate 11; a peripheral portion B1, which is connected to the end of the first concave portion B2 and extends outward around the first concave portion B2
  • the plate body B further includes: a partition convex portion B4, which is recessed upward from the side of the first concave portion B2 away from the bottom wall 111 and protrudes toward the bottom wall 111.
  • Each intermediate convex portion B3 is provided with an opening O penetrating in the vertical direction.
  • each protrusion 111P corresponds to an opening O of one middle convex portion B3 and is inserted into the opening O.
  • the design of the opening O can reduce the overall mass of the lower case 1.
  • the protrusion 111P is inserted into the opening O, which can position the first plate 11 and the second plate 12 to ensure the accuracy of the position of the two during the joining process; in addition, the protrusion 111P can also increase the opening O of the second plate 12 Strength of.
  • the peripheral edge of each protrusion 111P is hermetically connected to the inner edge of the opening O, preferably by welding.
  • the first lug E1 is provided with: a first lug edge E11 connected to the peripheral edge B1 of the plate B; and a second recess E12 that is recessed downward by the first lug edge E11 and is in contact with the first recess B2 Connected.
  • the second lug E2 is provided with: a second lug edge E21 connected to the peripheral edge B1 of the plate body B; and a third recess E22, which is recessed downward by the second lug edge E21 and is in contact with the first recess B2 Connected.
  • the partition convex portion B4 is connected to the middle convex portion B3 adjacent to the first lug E1 and the second lug E2, and extends to the peripheral edge portion B1 between the first lug E1 and the second lug E2, the partition convex portion B4
  • the inner top surface S of the fourth concave portion 111R of the first plate 11 is hermetically connected to block the branch flow path F33 adjacent to the inlet liquid flow path F1 and the outlet liquid flow path F2 at the position separating the convex portion B4.
  • the ear edge portion E21 is sealingly connected to the inner top surface S of the fourth recess 111R of the bottom wall 111, and the first recess B2 and the fourth recess 111R form a first main flow path F31, a plurality of parallel shunt paths F33, and a second Main flow path F32; the second recess E12 and the fourth recess 111R of the first lug E1 form an inflow channel F1 communicating with the first main flow path F31; the third recess E22 and the fourth recess 111R of the second lug E2 are formed The outlet flow path F2 communicating with the second main flow path F32.
  • the heat exchange medium flows in through the liquid inlet flow path F1, then flows into the first main flow path F31, and then enters a plurality of parallel branch flow paths F33 connected to the first main flow path F31, and then converges into the second main flow path F32, It is then discharged through the outlet flow path F2 to complete a heat exchange path.
  • Most of the known heat exchange paths are S-shaped or U-shaped flow paths.
  • each shunt F33 has a short heat exchange path, which improves the heat exchange effect; and the heat exchange medium temperature of each shunt F33 tends to be consistent, ensuring the uniformity of the heat exchange temperature, In turn, the consistency of the battery box temperature is improved.
  • the ear edge portion E21 and the fourth concave portion 111R are sealed and connected via an adhesive.
  • the sealed connection can also be achieved by laser welding, and the adhesive connection can be sealed first and then fixed by laser welding, which can be selected according to the specific circumstances, as long as a good seal can be ensured.
  • FIG. 6 is an exploded view of another embodiment of the lower case similar to FIG. 4.
  • the lower case 1 is not provided with a plurality of protrusions 111P on the bottom wall 111 of the first plate 11.
  • the structure of the first board 11 in one embodiment is the same, and the structure of the second board 12 is the same as that of the second board 12 in the first embodiment.
  • the difference is that since the bottom wall 111 is not provided with a plurality of protrusions 111P, and the corresponding opening 111P is not inserted into the opening O of the second plate 12, when connecting the first plate 11 and the second plate 12, it is necessary to insert the opening
  • the peripheral edge of O is sealingly connected to the bottom wall 111 of the first plate 11 to prevent the risk of dew, specifically, it can be connected by welding.
  • first plate 11 and the second plate 12 in this embodiment and the manner of joining the inlet liquid flow path F1, the outlet liquid flow path F2, and the main flow path F3 are the same as the first embodiment, and will not be repeated here Repeat the description. Eliminating the design of multiple protrusions 111P can increase the contact area of the bottom wall 111 and the battery pack 2 and improve the heat dissipation efficiency.
  • the opening O of the second plate 12 may also be eliminated.
  • the middle convex portion B3 may be sealed and connected to the inner top surface S of the fourth concave portion 111R through glue or welding.
  • FIG. 7 is an exploded view of another embodiment of the lower case similar to FIG. 4.
  • the lower case 1 is compared with the first embodiment, the bottom wall 111 of the first plate 11 is not provided with the fourth recess 111R, and other structures are the same as in the first embodiment
  • the structure of the first plate 11 is the same, and the structure of the second plate 12 is the same as that of the second plate 12 in the first embodiment, and will not be described in detail here.
  • the bottom wall 111 of the first plate 11 does not have the fourth concave portion 111R, the peripheral edge portion B1 of the plate body B1 and the plurality of intermediate convex portions B3 are respectively sealed with the bottom wall 111 of the first plate 11 Connected, the first concave portion B2 is spaced apart from the bottom wall 111 and forms a first main flow path F31, a second main flow path F32, and a plurality of parallel branch flow paths F33 communicating with the first main flow path F31 and the second main flow path F32;
  • the portion B4 is hermetically connected to the bottom wall 111 of the first plate 11 to block the branch flow path F33 adjacent to the inlet liquid flow path F1 and the outlet liquid flow path F2 at the position separating the convex portion B4.
  • the first lug edge portion E11 of the first lug E1 and the second lug edge portion E21 of the second lug E2 are sealedly connected to the bottom wall 111 respectively, and the second recess E12 of the first lug E1 is spaced from the bottom wall 111
  • the inlet liquid flow path F1 communicating with the first main flow path F31 is opened and formed; the third recess E22 of the second lug E2 is spaced apart from the bottom wall 111 and forms an outlet liquid flow path F2 communicating with the second main flow path F32.
  • the flow path formed in this embodiment is the same as the flow path of the first embodiment, and has the same technical effect as the flow path in the first embodiment in terms of heat exchange, except that the bottom wall 111 is set flat
  • the surface can increase the contact area with the battery pack 2 and improve the heat dissipation effect.
  • the 111P protrusion of the bottom wall 111 can be cancelled.
  • the opening O of the second plate 12 can also be adaptively cancelled, which can be selected according to the specific circumstances.

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

Abstract

本发明提供了一种电池箱，其包括下箱体，下箱体包括：第一板，包括：底壁；周壁，连接于底壁的周缘并向上延伸，底壁和周壁一起形成沿高向向上开口的收容空间；第二板从下方固定于底壁并与底壁接合形成入液流路、出液流路以及与入液流路、出液流路连通的主流路，主流路包括第一主流路、第二主流路和与第一主流路、第二主流路连通的多条并联的分流路。在本发明的电池箱中，第一板和第二板接合形成下箱体并形成换热流路，将箱体与换热流路集成为一体，降低了整体重量；此外，换热流路外置的设计，有效地避免了换热流路漏液对电池箱内部的电池的影响；再者，第一板和第二板接合形成的主流路的换热路径短，换热均匀，增加了换热效果。

Description

电池箱 技术领域
本发明涉及电池领域，尤其涉及一种电池箱。
背景技术
现今的动力电池换热***，大部分采用风换热和水换热***。但传统的水换热***多为口琴管设计，换热管道内置于下箱体的底部(即电池模组的下表面)，依据模组的排布和数量需要，进行换热管道的设计。这种换热方式的缺点一方面在于：换热管和箱体为独立分开的部分，其整体重量大；另一方面，设置于箱体内部的换热管的漏夜会严重威胁到整个电池箱的安全；再者，换热管的维修十分繁琐，需要将整个电池箱进行完全拆解，可操作性低。此外，换热管道多形成为S型或U型管道，这种管道中的换热介质在前段还具有良好的换热效果，然而经由层层流动，在流动到管道的后段时，换热介质已经吸收了一定的热量，换热效果相比于前段大大降低，造成了电池箱温度的不均匀性和不一致性。
发明内容
鉴于背景技术中存在的问题，本发明的一目的在于提供一种电池箱，其能够将换热***集成在箱体上，降低整体重量和制造成本。
鉴于背景技术中存在的问题，本发明的另一目的在于提供一种电池箱，其能够将换热流路置于箱体的外部，完全杜绝漏夜对电池箱内的部件造成损坏的风险。
鉴于背景技术中存在的问题，本发明的又一目的在于提供一种电池箱，其能够增加换热效果。
为了实现上述目的，本发明提供了一种电池箱，其包括下箱体，下箱体包括：第一板，包括：底壁；周壁，连接于底壁的周缘并向上延伸，底壁和周壁一起形成沿高向向上开口的收容空间；第二板从下方固定于底壁并与底 壁接合形成入液流路、出液流路以及与入液流路、出液流路连通的主流路，主流路包括第一主流路、第二主流路和与第一主流路、第二主流路连通的多条并联的分流路。
在一实施例中，第二板包括板体，板体包括：第一凹部，由第二板面向第一板的一侧向下凹入；周缘部，连接于第一凹部的端部并围绕第一凹部向外延伸；多个中间凸部，沿纵向间隔布置，各中间凸部由第一凹部远离底壁的一侧向上凹入并向底壁突出，且各中间凸部沿横向与第一凹部的周缘间隔开；其中，板体的周缘部、所述多个中间凸部分别与第一板的底壁密封连接，第一凹部与底壁间隔开并形成第一主流路、第二主流路和与第一主流路、第二主流路连通的多条并联的分流路。
在一实施例中，第二板还包括：第一突耳和第二突耳，沿纵向连接于板体的一侧且沿横向间隔开；第一突耳设有：第一突耳缘部，连接于板体的周缘部；以及第二凹部，由第一突耳缘部向下凹入且与第一凹部连通；第二突耳设有：第二突耳缘部，连接于板体的周缘部；以及第三凹部，由第二突耳缘部向下凹入且与第一凹部连通；其中，第一突耳的第一突耳缘部、第二突耳的第二突耳缘部分别与底壁密封连接，第一突耳的第二凹部与底壁间隔开并形成与第一主流路连通的入液流路；第二突耳的第三凹部与底壁间隔开并形成与第二主流路连通的出液流路。
在一实施例中，板体还包括：分隔凸部，由第一凹部远离底壁的一侧向上凹入并向底壁突出，分隔凸部连接于邻近第一突耳和第二突耳的中间凸部，并延伸至位于第一突耳与第二突耳之间的周缘部，分隔凸部与第一板的底壁密封连接，以将邻近入液流路和出液流路的分流路在分隔凸部的位置被阻断。
在一实施例中，第一板的底壁还设有：第四凹部，由底壁的面向第二板的一侧向上凹入并向相反的一侧突出，第四凹部的轮廓与第二板的外部轮廓相匹配，第二板嵌入底壁的第四凹部中。
在一实施例中，第二板的板体的周缘部、所述多个中间凸部、分隔凸部以及第一突耳的第一突耳缘部、第二突耳的第二突耳缘部分别与底壁的第四凹部的内顶面密封连接，第一凹部与第四凹部形成一个第一主流路、多条并联的分流路以及一个第二主流路；第一突耳的第二凹部与第四凹部形成与第 一主流路连通的入液流路；第二突耳的第三凹部与第四凹部形成与第二主流路连通的出液流路。
在一实施例中，第二板的板体的周缘部、所述多个中间凸部、分隔凸部以及第一突耳的第一突耳缘部、第二突耳的第二突耳缘部分别与第四凹部经由粘接胶密封连接。
在一实施例中，第二板的周缘与第四凹部的周缘焊接连接。
在一实施例中，第二板经由一体冲压成型。
在一实施例中，电池箱还包括：电池组，收容于第一板的收容空间中，且电池组的下表面与第一板的底壁导热接触。
本发明的有益效果如下：在本发明的电池箱中，第一板和第二板接合形成下箱体并形成换热流路，将箱体与换热流路集成为一体，降低了整体重量和制造成本；此外，换热流路外置的设计，有效地避免了换热流路漏液对电池箱内部的电池等部件的影响，提高了电池箱的安全性；再者，第一板和第二板接合形成的主流路的换热路径短，且换热均匀，由此增加了换热效果。
附图说明
图1是根据本发明的电池箱的立体分解图。
图2是图1的部分组成部件的视图。
图3是图2中的下箱体的仰视立体图。
图4是图3的分解图。
图5是图3的第一板的仰视立体图。
图6是与图4类似的下箱体的另一实施例的分解图。
图7是与图4类似的下箱体的再一实施例的分解图。
其中，附图标记说明如下：
1下箱体                        E11第一突耳缘部
11第一板                       E12第二凹部
111底壁                        E2第二突耳
111P突起                       E21第二突耳缘部
111R第四凹部                   E22第三凹部
S内顶面                        F1入液流路
112周壁                     F2出液流路
113凸缘                     F3主流路
114收容空间                 F31第一主流路
12第二板                    F32第二主流路
B板体                       F33分流路
B1周缘部                    2电池组
B2第一凹部                  3防护板
B3中间凸部                  L纵向
O开孔                       H高向
B4分隔凸部                  T横向
E1第一突耳
具体实施方式
附图示出本发明的实施例，且将理解的是，所公开的实施例仅仅是本发明的示例，本发明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发明。
此外，诸如纵向、高向和横向等用于说明本实施例中的电池箱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，且尽管当电池箱的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是根据本发明的电池箱的立体分解图。图2是图1的部分组成部件的视图。
根据本发明的电池箱包括：下箱体1；电池组2，收容于下箱体1中；以及防护板3，设置于下箱体1的下方。
图3是图2中的下箱体的仰视立体图。图4是图3的分解图。图5是图3的第一板11的仰视立体图。
下箱体1包括第一板11和第二板12，第二板12固定于第一板11的下方。
第一板11包括：底壁111；周壁112，连接于底壁111的周缘并向上延 伸，底壁111和周壁112一起形成沿高向H向上开口的收容空间114。下箱体还包括：凸缘113，连接于周壁112的端部并向下箱体1外部延伸，底壁111、周壁112以及凸缘113一体冲压形成。第一板11的厚度为0.6mm-1.2mm，优选为0.8mm。电池组2收容于第一板11的收容空间114中，且电池组2的下表面与第一板11的底壁111导热接触。电池组2可以通过导热垫、导热胶等与第一板11的底壁111导热接触，从而主流路F3能够对电池组2进行加热或冷却。
第二板12从下方固定于底壁111并与底壁111接合形成入液流路F1、出液流路F2以及与入液流路F1、出液流路F2连通的主流路F3，主流路F3包括第一主流路F31、第二主流路F32和与第一主流路F31、第二主流路F32连通的多条并联的分流路F33。第一板11的底壁111和周壁112一起形成沿高向H向上开口的收容空间114，第二板12从下方固定于底壁111并与底壁111接合形成换热流路(入液流路F1、出液流路F2、主流路F3)，实现了下箱体1与换热***的一体化，减轻了电池箱的整体重量，降低了制造成本；此外，换热流路形成在下箱体1的外部，避免了各流路露液对箱体内部的电池及其它部件造成影响，提高了电池箱的安全性；再者，形成的主流路F3包括第一主流路F31、第二主流路F32和与第一主流路F31、第二主流路F32连通的多条并联的分流路F33，这种流动路径相比于已知技术中的S型等路径而言，流动路径短，提高了换热效果，且各分流路F33的换热温度趋于一致，保证了电池箱温度的均匀性和一致性。
防护板3设置于第二板12的下方，从下方对下箱体1的主流路F3进行保护，保护下箱体1免受底部的破坏，同时还能起到保温的作用，防止热量扩散到外部。
第二板12与第一板11的底壁111有多种结合方式来形成入液流路F1、出液流路F2以及与入液流路F1、出液流路F2连通的主流路F3。下面对不同形成方式的实施例进行说明。
在第一实施例中，如图2至图5所示，第一板11的底壁111设有多个突起111P，突起111P由底壁111的背离第二板12的一侧向下凹入并向第二板12突出。第一板11的底壁111还设有：第四凹部111R，由底壁111的面向第二板12的一侧向上凹入并向相反的一侧突出，第四凹部111R的轮廓 与第二板12的外部轮廓相匹配，第二板12嵌入底壁111的第四凹部111R中。嵌入式的连接降低了第一板11和第二板12在高向H的接合高度，由此，降低了电池箱的整体高度，提高了电池箱的能量密度。第二板12的周缘与第四凹部111R的周缘焊接连接。第四凹部111R的设置能够增加收容换热介质的空间，提高电池箱的换热效率；且在第一板11与第二板12组装过程中，第四凹部111R能够使得第二板12准确地装配到位。
第二板12包括板体B。第二板12还包括：第一突耳E1和第二突耳E2，沿纵向L连接于板体B的一侧且沿横向T间隔开。第二板12经由一体冲压成型。
板体B包括：第一凹部B2，由第二板12面向第一板11的一侧向下凹入；周缘部B1，连接于第一凹部B2的端部并围绕第一凹部B2向外延伸；多个中间凸部B3，沿纵向L间隔布置，各中间凸部B3由第一凹部B2远离底壁111的一侧向上凹入并向底壁111突出，且各中间凸部B3沿横向T与第一凹部B2的周缘间隔开。板体B还包括：分隔凸部B4，由第一凹部B2远离底壁111的一侧向上凹入并向底壁111突出。各中间凸部B3设有沿上下方向贯通的开孔O。对应地，各突起111P对应一个中间凸部B3的开孔O并***开孔O中。开孔O的设计能够降低下箱体1的整体质量。突起111P***开孔O中，能够对第一板11和第二板12进行定位，保证二者在接合过程中位置的准确性；此外，突起111P还能增加第二板12的开孔O处的强度。各突起111P的周缘与开孔O的内侧缘密封连接，优选地，通过焊接连接。
第一突耳E1设有：第一突耳缘部E11，连接于板体B的周缘部B1；以及第二凹部E12，由第一突耳缘部E11向下凹入且与第一凹部B2连通。
第二突耳E2设有：第二突耳缘部E21，连接于板体B的周缘部B1；以及第三凹部E22，由第二突耳缘部E21向下凹入且与第一凹部B2连通。
分隔凸部B4连接于邻近第一突耳E1和第二突耳E2的中间凸部B3，并延伸至位于第一突耳E1与第二突耳E2之间的周缘部B1，分隔凸部B4与第一板11的第四凹部111R的内顶面S密封连接，以将邻近入液流路F1和出液流路F2的分流路F33在分隔凸部B4的位置被阻断。
第二板12的板体B的周缘部B1、所述多个中间凸部B3、分隔凸部B4以及第一突耳E1的第一突耳缘部E11、第二突耳E2的第二突耳缘部E21分 别与底壁111的第四凹部111R的内顶面S密封连接，第一凹部B2与第四凹部111R形成一个第一主流路F31、多条并联的分流路F33以及一个第二主流路F32；第一突耳E1的第二凹部E12与第四凹部111R形成与第一主流路F31连通的入液流路F1；第二突耳E2的第三凹部E22与第四凹部111R形成与第二主流路F32连通的出液流路F2。
换热介质经由入液流路F1流入，然后流进第一主流路F31，然后再进入与第一主流路F31连通的多条并联的分流路F33，再之后汇聚到第二主流路F32中，然后经由出液流路F2排出，完成一个换热路径，已知的技术换热路径大多为S型或U型流动路径，换热介质从入口处流到路径的后部区域时，换热介质的温度已经吸收了路径前段的热量，因此使得换热路径后段的换热效果不好，造成电池箱整体温度不均匀，而在本文的流动路径中，换热介质仅经由第一主流路F31直接进入到并联的分流路F33进行换热，各分流路F33换热路径短，提高了换热效果；且各分流路F33的换热介质温度趋于一致，保证了换热温度的均匀性，进而提高了电池箱温度的一致性。
第二板12的板体B的周缘部B1、所述多个中间凸部B3、分隔凸部B4以及第一突耳E1的第一突耳缘部E11、第二突耳E2的第二突耳缘部E21分别与第四凹部111R经由粘接胶密封连接。当然也可以通过激光焊接实现密封连接，还可以先粘胶密封连接再经由激光焊接进行固定，可根据具体情况进行选择，只要能够保证良好的密封即可。
图6是与图4类似的下箱体的另一实施例的分解图。
在图6所示的第二实施例中，下箱体1与第一实施例相比，第一板11的底壁111未设有多个突起111P，第一板11的其它的结构与第一实施例中的第一板11的结构相同，第二板12与第一实施例中的第二板12结构相同。不同的是，由于底壁111未设有多个突起111P，第二板12的开孔O没有对应的突起111P***，因此，第一板11与第二板12连接时，需要在将开孔O的周缘密封连接于第一板11的底壁111上，防止露液的风险，具体地，可以通过焊接连接。该实施例中的第一板11和第二板12的其它具体结构以及接合形成入液流路F1、出液流路F2以及主流路F3的方式均与第一实施例相同，在此不再重复说明。取消多个突起111P的设计能够增加底壁111与电池组2的接触面积，提高散热效率。此外，第二板12的开孔O也可以取 消，在这种情况下，中间凸部B3可以经过粘胶或焊接与第四凹部111R的内顶面S密封连接。
图7是与图4类似的下箱体的再一实施例的分解图。
在图7所示的第三实施例中，下箱体1与第一实施例相比，第一板11的底壁111未设有第四凹部111R，而其它的结构与第一实施例中的第一板11的相同，第二板12的结构与第一实施例中的第二板12相同，在此不再详细说明。在该实施例中，由于第一板11的底壁111未第四凹部111R，因此，板体B的周缘部B1、所述多个中间凸部B3分别与第一板11的底壁111密封连接，第一凹部B2与底壁111间隔开并形成第一主流路F31、第二主流路F32和与第一主流路F31、第二主流路F32连通的多条并联的分流路F33；分隔凸部B4与第一板11的底壁111密封连接，以将邻近入液流路F1和出液流路F2的分流路F33在分隔凸部B4的位置被阻断。第一突耳E1的第一突耳缘部E11、第二突耳E2的第二突耳缘部E21分别与底壁111密封连接，第一突耳E1的第二凹部E12与底壁111间隔开并形成与第一主流路F31连通的入液流路F1；第二突耳E2的第三凹部E22与底壁111间隔开并形成与第二主流路F32连通的出液流路F2。可以看出，本实施例形成的流动路径与第一实施例的流动路径相同，在换热方面起到与第一实施例中的流动路径相同的技术效果，不同的是，底壁111设置成平的表面能够增大与电池组2的接触面积，提高散热效果。当然在该实施例中，底壁111的111P突起可以取消，在取消111P突起的情况下，第二板12的开孔O也可以适应性地取消，可根据具体情况进行选择。
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，包括下箱体(1)；其特征在于，下箱体(1)包括：
    第一板(11)，包括：底壁(111)；周壁(112)，连接于底壁(111)的周缘并向上延伸，底壁(111)和周壁(112)一起形成沿高向(H)向上开口的收容空间(114)；
    第二板(12)从下方固定于底壁(111)并与底壁(111)接合形成入液流路(F1)、出液流路(F2)以及与入液流路(F1)、出液流路(F2)连通的主流路(F3)，主流路(F3)包括第一主流路(F31)、第二主流路(F32)和与第一主流路(F31)、第二主流路(F32)连通的多条并联的分流路(F33)。
  2. 根据权利要求1所述的电池箱，其特征在于，第二板(12)包括板体(B)，板体(B)包括：
    第一凹部(B2)，由第二板(12)面向第一板(11)的一侧向下凹入；
    周缘部(B1)，连接于第一凹部(B2)的端部并围绕第一凹部(B2)向外延伸；
    多个中间凸部(B3)，沿纵向(L)间隔布置，各中间凸部(B3)由第一凹部(B2)远离底壁(111)的一侧向上凹入并向底壁(111)突出，且各中间凸部(B3)沿横向(T)与第一凹部(B2)的周缘间隔开；
    其中，板体(B)的周缘部(B1)、所述多个中间凸部(B3)分别与第一板(11)的底壁(111)密封连接，第一凹部(B2)与底壁(111)间隔开并形成第一主流路(F31)、第二主流路(F32)和与第一主流路(F31)、第二主流路(F32)连通的多条并联的分流路(F33)。
  3. 根据权利要求2所述的电池箱，其特征在于，
    第二板(12)还包括：第一突耳(E1)和第二突耳(E2)，沿纵向(L)连接于板体(B)的一侧且沿横向(T)间隔开；
    第一突耳(E1)设有：第一突耳缘部(E11)，连接于板体(B)的周缘部(B1)；以及第二凹部(E12)，由第一突耳缘部(E11)向下凹入且与第一凹部(B2)连通；
    第二突耳(E2)设有：第二突耳缘部(E21)，连接于板体(B)的周缘部(B1)；以及第三凹部(E22)，由第二突耳缘部(E21)向下凹入且与第一凹部(B2)连通；
    其中，第一突耳(E1)的第一突耳缘部(E11)、第二突耳(E2)的第二突耳缘部(E21)分别与底壁(111)密封连接，第一突耳(E1)的第二凹部(E12)与底壁(111)间隔开并形成与第一主流路(F31)连通的入液流路(F1)；第二突耳(E2)的第三凹部(E22)与底壁(111)间隔开并形成与第二主流路(F32)连通的出液流路(F2)。
  4. 根据权利要求3所述的电池箱，其特征在于，板体(B)还包括：
    分隔凸部(B4)，由第一凹部(B2)远离底壁(111)的一侧向上凹入并向底壁(111)突出，分隔凸部(B4)连接于邻近第一突耳(E1)和第二突耳(E2)的中间凸部(B3)，并延伸至位于第一突耳(E1)与第二突耳(E2)之间的周缘部(B1)，分隔凸部(B4)与第一板(11)的底壁(111)密封连接，以将邻近入液流路(F1)和出液流路(F2)的分流路(F33)在分隔凸部(B4)的位置被阻断。
  5. 根据权利要求4所述的电池箱，其特征在于，
    第一板(11)的底壁(111)还设有：第四凹部(111R)，由底壁(111)的面向第二板(12)的一侧向上凹入并向相反的一侧突出，第四凹部(111R)的轮廓与第二板(12)的外部轮廓相匹配，第二板(12)嵌入底壁(111)的第四凹部(111R)中。
  6. 根据权利要求5所述的电池箱，其特征在于，
    第二板(12)的板体(B)的周缘部(B1)、所述多个中间凸部(B3)、分隔凸部(B4)以及第一突耳(E1)的第一突耳缘部(E11)、第二突耳(E2)的第二突耳缘部(E21)分别与底壁(111)的第四凹部(111R)的内顶面(S)密封连接，第一凹部(B2)与第四凹部(111R)形成一个第一主流路(F31)、多条并联的分流路(F33)以及一个第二主流路(F32)；第一突耳(E1)的第二凹部(E12)与第四凹部(111R)形成与第一主流路(F31)连通的入液 流路(F1)；第二突耳(E2)的第三凹部(E22)与第四凹部(111R)形成与第二主流路(F32)连通的出液流路(F2)。
  7. 根据权利要求5所述的电池箱，其特征在于，
    第二板(12)的板体(B)的周缘部(B1)、所述多个中间凸部(B3)、分隔凸部(B4)以及第一突耳(E1)的第一突耳缘部(E11)、第二突耳(E2)的第二突耳缘部(E21)分别与第四凹部(111R)经由粘接胶密封连接。
  8. 根据权利要求5所述的电池箱，其特征在于，第二板(12)的周缘与第四凹部(111R)的周缘焊接连接。
  9. 根据权利要求1所述的电池箱，其特征在于，第二板(12)经由一体冲压成型。
  10. 根据权利要求1所述的电池箱，其特征在于，电池箱还包括：电池组(2)，收容于第一板(11)的收容空间(114)中，且电池组(2)的下表面与第一板(11)的底壁(111)导热接触。
PCT/CN2019/079678 2018-12-27 2019-03-26 电池箱 WO2020133763A1 (zh)

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