WO2023130841A1 - 动力电池总成 - Google Patents

动力电池总成 Download PDF

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Publication number
WO2023130841A1
WO2023130841A1 PCT/CN2022/132607 CN2022132607W WO2023130841A1 WO 2023130841 A1 WO2023130841 A1 WO 2023130841A1 CN 2022132607 W CN2022132607 W CN 2022132607W WO 2023130841 A1 WO2023130841 A1 WO 2023130841A1
Authority
WO
WIPO (PCT)
Prior art keywords
upper box
plate
power battery
battery assembly
assembly according
Prior art date
Application number
PCT/CN2022/132607
Other languages
English (en)
French (fr)
Inventor
史智宏
肖聪
刘安龙
徐鹏
韩海滨
Original Assignee
广州小鹏汽车科技有限公司
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 广州小鹏汽车科技有限公司 filed Critical 广州小鹏汽车科技有限公司
Publication of WO2023130841A1 publication Critical patent/WO2023130841A1/zh

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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
    • H01M10/61—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
    • H01M10/655—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
    • 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 present application relates to the technical field of batteries, in particular to a power battery assembly.
  • VDA German Automobile Industry Association
  • the purpose of this application is to provide a power battery assembly with low integration and high energy density and an electrode firing method.
  • the present application provides a power battery assembly, including a lower case, an upper case and a plurality of cell stacks, the lower case and the upper case are buckled and fixedly connected, and the cells are stacked on the In the cavity formed by fastening the lower box and the upper box, the cells are stacked on the surface of the cooling plate, the cell stack includes a cell group, and the cell group includes a plurality of The battery cell, the side surface and the bottom surface of the battery cell group are all exposed, and the battery cells of the battery cell group are in contact with the cooling plate.
  • the lower box includes a cooling plate and a frame fixedly connected to the cooling plate, the frame includes two opposite side walls, two opposite end walls, connected to two The crossbeams and longitudinal beams between the side walls, the two end walls are respectively arranged at the two ends of the side walls, the plurality of crossbeams are arranged in parallel with each other, and the plurality of longitudinal beams are arranged in parallel with each other at intervals, so The crossbeam is vertically intersected with the longitudinal beam, so that the space surrounded by the cooling plate, the side wall and the end wall of the lower box is divided into a plurality of accommodating cavities, and the accommodating cavities contain The cell stack.
  • one of the end walls is provided with a plurality of connection positions, and a plurality of electronic devices are collectively installed on the connection positions of the end wall; one end of the upper box is provided with a maintenance port, The maintenance opening corresponds to the position of the electronic device, and the maintenance opening is covered with a cover, and the cover is recessed toward a side away from the lower box.
  • the beam of the lower box includes a first beam and a second beam, the width of the first beam is greater than the width of the second beam; bit blocks.
  • a support column is provided between the end wall and the second beam; a connecting column is provided at the top of the longitudinal beam , the connecting column is fixedly connected to the upper box body.
  • the lower box further includes a guard plate, and the guard plate is arranged on a side of the cooling plate away from the cell stack.
  • the upper box is further provided with an upper box beam and an upper box longitudinal beam, and the upper box beam is fixedly connected to the side of the upper box away from the lower box,
  • the longitudinal beams of the upper box are fixedly connected to both sides of the upper box, and the cross beams of the upper box are provided with fixing seats for fixing vehicle seats.
  • the battery cell stack further includes an end plate, a wire harness isolation plate and a top plate, the two end plates are respectively arranged at both ends of the battery core group, and the wire harness isolation plate is arranged on the wire harness isolation plate.
  • the top of the core group, the top plate covers the side of the wire harness isolation plate away from the battery core group;
  • the end plate includes an inner surface facing the battery core group and an outer surface facing away from the battery core group ,
  • the outer surface is provided with a guiding and limiting structure;
  • the side wall of the beam facing the accommodating cavity is also provided with a guide groove, and the guiding and limiting structure is matched with the guiding groove of the lower box body.
  • a first protrusion is provided on the outer surface of the end plate, the height of the first protrusion is smaller than the guide and stop structure, and the first protrusion and the lower box body The beam fits.
  • a sheath is provided on the outer surface of the end plate, and a connector is embedded in the sheath, and the wire harness isolation plate is provided with a tab electrically connected to the battery core.
  • the connection line and pole, the pole is electrically connected to the connector on the sheath, and the sheath extends above the beam.
  • the cells of the cell stack are directly in contact with the cooling plate, and the bottom plate of the cell stack and the bottom plate of the lower box are omitted, so that there are fewer components in the power battery assembly and the power supply is simplified.
  • the structure of the battery assembly can greatly reduce the weight of the cell stack, thereby improving the integration and energy density of the power battery assembly, and at the same time enhancing the cooling effect.
  • FIG. 1 is a schematic diagram of an assembly structure of a power battery assembly according to an embodiment of the present application.
  • FIG. 2 is a partially exploded schematic diagram of the power battery assembly shown in FIG. 1 .
  • FIG. 3 is an exploded schematic diagram of the power battery assembly shown in FIG. 1 .
  • FIG. 4 is a schematic structural view of the lower case of the power battery assembly shown in FIG. 1 .
  • FIG. 5 is a schematic structural view of the cell stack of the power battery assembly shown in FIG. 1 .
  • FIG. 6 is an exploded schematic view of the cell stack shown in FIG. 5 .
  • FIG. 7 is a schematic structural diagram of an end plate of the cell stack shown in FIG. 5 .
  • Fig. 1 is a schematic diagram of an assembly structure of a power battery assembly according to an embodiment of the present application
  • Fig. 2 is a partially exploded schematic diagram of the power battery assembly shown in Fig. 1
  • Fig. 3 is a schematic diagram of an exploded diagram of the power battery assembly shown in Fig. 1 .
  • the power battery assembly includes a lower case 11, an upper case 13 and a plurality of cell stacks 15, the lower case 11 and the upper case 13 are fastened and fixedly connected,
  • the cell stack 15 is disposed in the cavity formed by fastening the lower box body 11 and the upper box body 13 .
  • the lower box body 11 includes a cooling plate 112 and a frame body 113 fixedly connected to the cooling plate 112 .
  • the frame body 113 includes two opposite side walls 114, two opposite end walls 115, a beam 116 and a longitudinal beam 117 connected between the two side walls 114, and the two end walls 115 are respectively arranged on two sides of the side walls 114. end.
  • a plurality of cross beams 116 are arranged parallel to each other at intervals, and a plurality of longitudinal beams 117 are arranged at intervals in parallel with each other, and the cross beams 116 and the longitudinal beams 117 are vertically intersected, thereby enclosing the space enclosed by the cooling plate 112, the side wall 114 and the end wall 115 of the lower box body 11 Divided into a plurality of accommodation cavities 119 , the accommodation cavities 119 accommodate the cell stack 15 , and the cell stack 15 is arranged on the surface of the cooling plate 112 . Specifically, in this embodiment, each accommodation cavity 119 accommodates one cell stack 15 , of course, each accommodation cavity 119 can also accommodate two or more cell stacks 15 . Wherein, "plurality" refers to two or more than two.
  • the accommodating cavity for the cell stack can be defined by setting the beam and the longitudinal beam, and there is no need to set too many structures to fix the cell stack, and at the same time, the cell stack is directly in contact with the cooling plate, omitting the lower box
  • the bottom plate makes the power battery assembly less components, simplifies the structure of the power battery assembly, can greatly reduce the weight of the cell stack, thereby improving the integration and energy density of the power battery assembly, and at the same time enhances the cooling effect .
  • the battery cell stack 15 can be bonded to the cooling plate 112 with a heat-conducting structural adhesive to realize connection and heat conduction.
  • the cooling plate 112 is provided with an anti-overflow adhesive film corresponding to the edge of the cell stack 15 to prevent the heat-conducting structural adhesive from overflowing to the outside.
  • an insulating film is provided on the side of the cooling plate 112 facing the cell stack 15 to ensure the insulation performance between the cell stack 15 and the cooling plate 112 .
  • the cooling plate 112 may be made by an integrated brazing plate, but is not limited thereto, for example, may also be made by a split brazing plate. Specifically, the thickness of the cooling plate 112 may be 5mm ⁇ 8mm, but not limited thereto.
  • the frame body 113 can be made by tailor welding of aluminum profiles. It can be understood that the frame body 113 can also be made by casting aluminum, profiles and the like.
  • one of the end walls 115 is provided with multiple connection positions to centrally install the battery protection unit (BDU), battery management system (BMS), voltage converter (DCDC), on-board charging module (OBC), smart fuse Electronic components such as driver boards.
  • BDU battery protection unit
  • BMS battery management system
  • DCDC voltage converter
  • OBC on-board charging module
  • smart fuse Electronic components such as driver boards.
  • “plurality” refers to two or more than two. More specifically, the top and side surfaces of one of the two end walls 115 are respectively provided with connection positions, and the connection positions on the top surface are used to install a battery protection box (BDU) 1182, a battery management system (BMS) 1184, Converter (DCDC), on-board charging module (OBC) two-in-one module 1186, intelligent fuse driver board, and the connection position on the side is used to install the slave control acquisition unit 1188.
  • BDU battery protection box
  • BMS battery management system
  • DCDC converter
  • OBC on-board charging module
  • the beam 116 of the lower box 11 includes a first beam 121 and a second beam 123 , and the width of the first beam 121 is greater than that of the second beam 123 .
  • the width of the first beam 121 may be 110mm-120mm
  • the width of the second beam 123 may be 30mm-35mm.
  • the first crossbeam 121 is located between two second crossbeams 123 , and the two second crossbeams 123 are disposed close to both ends of the lower box body 11 .
  • the beam 116 can be made of a profile.
  • a limit block 1212 is provided on the top of the first beam 121 to increase the overall strength of the power battery assembly, thereby enhancing the safety of the side collision of the vehicle.
  • two limit blocks 1212 are respectively provided at both ends of the top of the first beam 121 .
  • the limiting block 1212 can be installed on the first beam 121 through bolts.
  • the limiting block 1212 can also be fixed to the first beam 121 by welding or other means, and can also be integrally formed with the first beam 121 .
  • the height of the limiting block 1212 may be 50mm-55mm, the width may be 55mm-65mm, and the length may be 95mm-100mm, but not limited thereto.
  • a avoidance groove 1162 is defined on a side wall of the beam 116 facing the receiving cavity 119 .
  • the manipulator can be avoided when the manipulator grabs the cell stack 15 and puts it into the accommodation chamber 119 .
  • three spaced escape grooves 1162 are defined on the sidewalls of the beams 116 toward each of the receiving chambers 119 .
  • the avoidance groove 1162 may have a depth of 10mm-15mm and a width of 25mm-30mm, but not limited thereto.
  • a guide groove 1164 is provided on the side wall of the second beam 123 close to the end wall 115 and facing the accommodating cavity 119 to cooperate with the guide and stop structure 1532 on the end plate 153 of the cell stack 15 to adjust the cell stack. guide and limit.
  • the width of the longitudinal beam 117 may be 20 mm to 35 mm.
  • the strength of the power battery assembly can also be improved.
  • the stringers 117 can be made of profiles.
  • the top of the longitudinal beam 117 is provided with a connecting column 1172 to be fixedly connected to the upper box body 13 of the power battery assembly, which can enhance the rigidity of the upper box body.
  • a connecting column 1172 to be fixedly connected to the upper box body 13 of the power battery assembly, which can enhance the rigidity of the upper box body.
  • threaded holes are opened in the connecting column 1172, and the upper box body 13 and the lower box body 11 can be fixedly connected by bolts.
  • the end wall 115 is provided with a mounting block 126, and the mounting block 126 is provided with a plug-in installation hole and a plug-in through hole for installing the plug-in. This can ensure sealing while preventing the plug-in wire harness from interfering with the lower box body 11 .
  • the mounting block 126 can specifically be a cast aluminum block, which is fixedly connected to the end wall 115 by welding.
  • three beams 116 and two longitudinal beams 117 divide the space in the lower box body 11 into six accommodating cavities 119 .
  • the overall width of the power battery assembly may be 1450mm ⁇ 1550mm, and the length may be 2100mm ⁇ 2200mm.
  • the lower box body 11 further includes a guard plate 127 disposed on a side of the cooling plate 112 away from the cell stack 15 .
  • a guard plate 127 disposed on a side of the cooling plate 112 away from the cell stack 15 .
  • one end of the upper box body 13 is provided with a maintenance port, and the maintenance port corresponds to the position of the electronic device.
  • the maintenance port is covered with a cover body 132, and the cover body 132 is recessed to the side away from the lower box body 11, so as to Accommodates electrical components such as the battery protection box 1182 .
  • a sealing strip may be provided between the cover body 132 and the upper box body 13 for sealing.
  • the upper box 13 is also provided with an upper box beam 134 and an upper box longitudinal beam 136, the upper box beam 134 is fixedly connected to the side of the upper box 13 away from the lower box 11, and the upper box longitudinal beam 136 is fixedly connected to both sides of the upper box body 13, and the upper box body beam 134 is provided with a fixing seat 1342 to fix the vehicle seat.
  • the upper box beam 134 and the upper box longitudinal beam 136 By arranging the upper box beam 134 and the upper box longitudinal beam 136, the anti-collision capability of the vehicle can be improved.
  • the upper box beam 134 can be fixedly connected to the upper box body 13 by means of welding or the like
  • the upper box body longitudinal beam 136 can be a profile and can be fixedly connected to the upper box body 13 by means of screw connection or the like.
  • the upper box body 13 can be formed by sheet metal stamping.
  • the power battery assembly further includes a sealing member 19, and the sealing member 19 is arranged between the lower box body 11 and the upper box body 13 to achieve sealing.
  • the cell stack 15 includes a cell group 151 , an end plate 153 , a partition plate 155 , a wire harness isolation plate 157 and a top plate 159 .
  • the cell pack 151 includes a plurality of cells 1512 .
  • the two end plates 153 are respectively disposed on two ends of the cell set 151 .
  • the partition plate 155 is disposed between adjacent battery cells 1512 .
  • the wire harness isolation plate 157 is disposed on the top of the battery core set 151 , and the top plate 159 covers the side of the wire harness isolation plate 157 away from the battery core set 151 .
  • the end plate 153 is an injection molded plate, and the side and the bottom of the cell pack 151 are exposed.
  • the end plate is an injection molded plate, and canceling the side plate and bottom plate, the side and bottom of the cell pack are exposed, reducing the components of the cell stack, simplifying the structure of the cell stack, and greatly reducing the weight of the cell stack. weight, thereby improving the integration and energy density of the cell stack; at the same time, avoiding the use of metal end plates, side plates and bottom plates can have a good effect of preventing thermal runaway and preventing the occurrence of arcing; and , the bottom surface of the cell pack is exposed, which allows the cells to directly contact the cooling plate for better cooling effect.
  • the plurality of battery cells 1512 are divided into two columns, each column is provided with a plurality of battery cells 1512 , and every two battery cells 1512 in two columns are arranged side by side.
  • the cell stack includes 12 or 14 cells 1512 .
  • the number of battery cells 1512 can also be increased or decreased according to actual conditions.
  • the cell 1512 is a square cell. More specifically, the size of the battery cell 1512 is 190mm-200mm in length, 45mm-55mm in thickness, and 90mm-120mm in height, but of course it is not limited thereto.
  • the end plate 153 includes an inner surface facing the battery pack 151 and an outer surface facing away from the battery pack 151 , and a guiding and limiting structure 1532 is provided on the outer surface.
  • the guiding and limiting structure 1532 is arranged perpendicular to the top surface of the cell pack 151 , that is, the guiding and limiting structure 1532 is arranged along the height direction of the cell stack.
  • two guiding and limiting structures 1532 are arranged in parallel at intervals.
  • the guiding and limiting structure 1532 can cooperate with the guide groove 1164 of the lower box body 11. On the one hand, it can guide the cell stack into the box, and on the other hand, it can laterally position the cell stack after it is assembled into the box body. Prevent the cell stack from shaking left and right to improve the safety of the battery pack.
  • a first protrusion 1534 is provided on the outer surface of the end plate 153 , the height of the first protrusion 1534 is smaller than that of the guiding and limiting structure 1532 , and the first protrusion 1534 is attached to the beam 116 of the lower box 11 .
  • a plurality of first protrusions 1534 are arranged in parallel at intervals.
  • a sheath 1538 is provided on the outer surface of the end plate 153, a connector 1539 is embedded in the sheath 1538, and a connection line and a pole electrically connected to the tab of the battery cell 1512 are provided on the wire harness isolation plate 157.
  • the pole 1572 is electrically connected to the connector 1539 on the sheath 1538 , and the sheath 1538 extends above the beam 116 .
  • the external copper bars can be arranged at positions corresponding to the beams 116, which facilitates the spatial arrangement of the copper bars.
  • the connector 1539 is a conductive component; the two sheaths 1538 are disposed near the top of the end plate 153 .

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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)

Abstract

本申请公开一种动力电池总成，包括下箱体、上箱体和多个电芯堆，所述下箱体和所述上箱体扣合并固定连接，所述电芯堆设于所述下箱体和所述上箱体扣合形成的空腔内，所述电芯堆设于所述冷却板的表面上，所述电芯堆包括电芯组，所述电芯组包括多个所述电芯，所述电芯组的侧面和底面均外露，且所述电芯组的所述电芯与所述冷却板接触。

Description

动力电池总成
本申请要求于2022年1月6日申请的、申请号为202210014309.0的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，特别是涉及一种动力电池总成。
 背景技术
在国家的支持和市场的利好下，动力锂电池行业发展非常迅速，其应用已经扩展到了电动大巴、电动小汽车、微公交和储能等领域，而随着动力锂电池的大规模应用，日益凸显的问题也越来越多，总的来说，包括了固定、散热、电连接、采样和模组的正负极输出几方面。
目前，动力电池一般采用独立的标准VDA（德国汽车工业联合会）尺寸模组进行组装，VDA标准模组结构复杂，动力电池集成度较低、能量密度也较低。
 技术问题
本申请的目的是提供一种集成度较低、能量密度较高的动力电池总成及电极焙烧方法。
 技术解决方案
本申请提供一种动力电池总成，包括下箱体、上箱体和多个电芯堆，所述下箱体和所述上箱体扣合并固定连接，所述电芯堆设于所述下箱体和所述上箱体扣合形成的空腔内，所述电芯堆设于所述冷却板的表面上，所述电芯堆包括电芯组，所述电芯组包括多个所述电芯，所述电芯组的侧面和底面均外露，且所述电芯组的所述电芯与所述冷却板接触。
其中一实施例中，所述下箱体包括冷却板和固定连接于所述冷却板的框体，所述框体包括两个相对的侧壁、两个相对的端壁、连接于两个所述侧壁之间的横梁和纵梁，两个所述端壁分别设于所述侧壁的两端，多个所述横梁相互平行间隔设置，多个所述纵梁相互平行间隔设置，所述横梁与所述纵梁垂直相交，从而将所述下箱体的所述冷却板和所述侧壁、所述端壁围成的空间分隔为多个容纳腔，所述容纳腔内容纳所述电芯堆。
其中一实施例中，其中一个所述端壁上设有多个连接位，所述端壁的所述连接位上集中安装有多个电子器件；所述上箱体的一端开设有维修口，所述维修口与所述电子器件的位置对应，所述维修口处盖设有盖体，所述盖体向远离所述下箱体的一侧凹陷。
其中一实施例中，所所述下箱体的所述横梁包括第一横梁和第二横梁，所述第一横梁的宽度大于所述第二横梁的宽度；所述第一横梁的顶部设有限位块。
其中一实施例中，所述端壁和所述第二横梁之间间隔一定距离，且所述端壁和所述第二横梁之间设有支撑柱；所述纵梁的顶部设有连接柱，所述连接柱固定连接于所述上箱体。
其中一实施例中，所述下箱体还包括护板，所述护板设于所述冷却板远离所述电芯堆的一侧。
其中一实施例中，所述上箱体上还设有上箱体横梁和上箱体纵梁，所述上箱体横梁固定连接于所述上箱体远离所述下箱体的一侧，所述上箱体纵梁固定连接于所述上箱体的两侧，所述上箱体横梁上设有用于固定车辆座椅的固定座。
其中一实施例中，所述电芯堆还包括端板、线束隔离板和顶板，两个所述端板分别设于所述电芯组的两端，所述线束隔离板设于所述电芯组的顶部，所述顶板覆盖于所述线束隔离板远离所述电芯组的一侧；所述端板包括朝向所述电芯组的内侧面和背向所述电芯组的外侧面，所述外侧面上设有导向限位结构；所述横梁朝向所述容纳腔的侧壁上还开设导槽，所述导向限位结构与所述下箱体的所述导槽配合。
其中一实施例中，所述端板的外侧面上还设有第一凸起，所述第一凸起的高度小于所述导向限位结构，所述第一凸起与所述下箱体的所述横梁贴合。
其中一实施例中，所述端板的外侧面上还设有护套，所述护套上内嵌有连接件，所述线束隔离板上设有与所述电芯的极耳电性连接的连接线路和极柱，所述极柱电性连接于所述护套上的所述连接件，所述护套延伸至所述横梁的上方。
 有益效果
本申请实施例的动力电池总成中，将电芯堆的电芯直接与冷却板接触，省略了电芯堆的底板和下箱体的底板，使得动力电池总成部件较少，简化了动力电池总成的结构，可大大减轻电芯堆的重量，从而提高了动力电池总成的集成度和能量密度，同时还能增强冷却效果。
 附图说明
图1为本申请一实施例的动力电池总成的组装结构示意图。
图2为图1所示动力电池总成的部分分解示意图。
图3为图1所示动力电池总成的分解示意图。
图4为图1所示动力电池总成的下箱体的结构示意图。
图5为图1所示动力电池总成的电芯堆的结构示意图。
图6为图5所示电芯堆的分解示意图。
图7为图5所示电芯堆的端板的结构示意图。
 本发明的实施方式
为更进一步阐述本申请为达成预定发明目的所采取的技术方式及功效，以下结合附图及实施例，对本申请的具体实施方式、结构、特征及其功效，详细说明如后。
图1为本申请一实施例的动力电池总成的组装结构示意图；图2为图1所示动力电池总成的部分分解示意图；图3为图1所示动力电池总成的分解示意图。请参照图1至图3，在本实施例中，动力电池总成包括下箱体11、上箱体13和多个电芯堆15，下箱体11和上箱体13扣合并固定连接，电芯堆15设于下箱体11和上箱体13扣合形成的空腔内。下箱体11包括冷却板112和固定连接于冷却板112的框体113。框体113包括两个相对的侧壁114、两个相对的端壁115、连接于两个侧壁114之间的横梁116和纵梁117，两个端壁115分别设于侧壁114的两端。多个横梁116相互平行间隔设置，多个纵梁117相互平行间隔设置，横梁116与纵梁117垂直相交，从而将下箱体11的冷却板112和侧壁114、端壁115围成的空间分隔为多个容纳腔119，容纳腔119内容纳电芯堆15，电芯堆15设于冷却板112的表面上。具体在本实施例中，每个容纳腔119内容纳一个电芯堆15，当然，每个容纳腔119内也可容纳两个或两个以上电芯堆15。其中，“多个”是指两个或两个以上。
本申请实施例中，通过设置横梁和纵梁可限定出容纳电芯堆的容纳腔，无需设置过多结构来固定电芯堆，同时将电芯堆直接与冷却板接触，省略了下箱体的底板，使得动力电池总成部件较少，简化了动力电池总成的结构，可大大减轻电芯堆的重量，从而提高了动力电池总成的集成度和能量密度，同时还能增强冷却效果。
本实施例中，电芯堆15可通过导热结构胶粘接在冷却板112上，实现连接和导热。冷却板112对应电芯堆15边缘位置设有防溢胶膜，以防止导热结构胶溢出到外面。
具体地，冷却板112朝向电芯堆15的一侧面上设有绝缘膜，以保证电芯堆15和冷却板112之间的绝缘性能。
具体地，冷却板112可采用一体式钎焊板方式制成，但不限于此，例如也可采用分体式钎焊板方式制成。具体地，冷却板112的厚度可为5mm~8mm，但不限于此。
具体地，框体113可采用铝型材拼焊方式制成。可以理解，框体113也可通过铸铝、型材等制造而成。
具体地，其中一个端壁115上设有多个连接位，以集中安装电池保护盒（BDU）、电池管理系统（BMS）、电压变换器（DCDC）、车载充电模块（OBC）、智能熔断器驱动板等电子器件。其中，“多个”是指两个或两个以上。更具体地，两个端壁115的其中一个的顶面和侧面上分别设有连接位，顶面上的连接位用于安装电池保护盒（BDU）1182、电池管理系统（BMS）1184、电压变换器（DCDC）车载充电模块（OBC）二合一模块1186、智能熔断器驱动板，侧面上的连接位用于安装从控采集单元1188。
具体地，请一并参照图4，下箱体11的横梁116包括第一横梁121和第二横梁123，第一横梁121的宽度大于第二横梁123的宽度。具体地，第一横梁121的宽度可为110mm~120mm，第二横梁123的宽度可为30mm~35mm。具体地，第一横梁121位于两个第二横梁123之间，两个第二横梁123靠近下箱体11的两端而设。通过设置横梁116，还可增大动力电池总成的整体强度，从而增强车辆侧面碰撞的安全性。具体地，横梁116可由型材制成。
具体地，第一横梁121的顶部设有限位块1212，以增大动力电池总成的整体强度，从而增强车辆侧面碰撞的安全性。具体地，第一横梁121的顶部的两端分别设有两个限位块1212。限位块1212可通过螺栓安装在第一横梁121上。当然，限位块1212也可通过焊接等其他方式固定于第一横梁121，也可与第一横梁121一体成型。更具体地，限位块1212的高度可为50mm~55mm，宽度可为55mm~65mm，长度可为95mm~100mm，但不以此为限。
具体地，横梁116朝向容纳腔119的侧壁上开设有避让槽1162。通过开设避让槽1162，可在机械手抓取电芯堆15放入到容纳腔119内时避让机械手。更具体地，横梁116朝向每个容纳腔119的侧壁上开设有三个间隔的避让槽1162。避让槽1162的深度可为10mm~15mm，宽度可为25mm~30mm，但并不以此为限。
具体地，第二横梁123靠近端壁115、且朝向容纳腔119的侧壁上还开设导槽1164，以与电芯堆15的端板153上的导向限位结构1532配合对电芯堆进行导向和限位。
具体地，纵梁117的宽度可为20mm~35mm。通过设置纵梁117，也可提升动力电池总成的强度。具体地，纵梁117可由型材制成。
具体地，纵梁117的顶部设有连接柱1172，以固定连接于动力电池总成的上箱体13，这样可增强上箱体的刚度。具体地，连接柱1172内开设有螺纹孔，可通过螺栓将上箱体13和下箱体11固定连接。
具体地，端壁115和第二横梁123之间间隔一定距离，且端壁115和第二横梁123之间设有支撑柱125。通过此结构，可进一步加强下箱体11的强度。
具体地，端壁115上设有安装块126，安装块126上设有插件安装孔和插件过孔，用于安装插件。这样可保证密封的同时防止插件线束与下箱体11干涉。安装块126具体可为铸铝块，其通过可焊接方式固定连接于端壁115。
具体地，本实施例中三个横梁116和两个纵梁117将下箱体11内的空间分割为六个容纳腔119。动力电池总成的总体宽度可为1450mm~1550mm，长度可为2100mm~2200mm。
具体地，下箱体11还包括护板127，护板127设于冷却板112远离电芯堆15的一侧。通过设置护板127，可防护动力电池总成底部受到的冲击，增加电池安全性。
本实施例中，上箱体13的一端开设有维修口，维修口与电子器件的位置对应，维修口处盖设有盖体132，盖体132向远离下箱体11的一侧凹陷，以容纳电池保护盒1182等电气器件。具体地，盖体132和上箱体13之间可设置密封条以密封。通过设置维修口，通过打开盖体132，可方便对电子器件进行维修或更换，而无需打开整个上箱体13，大大方便了动力电池总成的维护。
具体地，上箱体13上还设有上箱体横梁134和上箱体纵梁136，上箱体横梁134固定连接于上箱体13远离下箱体11的一侧，上箱体纵梁136固定连接于上箱体13的两侧，上箱体横梁134上设有固定座1342，以固定车辆座椅。通过设置上箱体横梁134和上箱体纵梁136，可提高车辆的防撞能力。具体地，上箱体横梁134可通过焊接等方式固定连接于上箱体13，上箱体纵梁136可为型材，可通过螺纹连接等方式固定连接于上箱体13。
具体地，上箱体13可采用钣金冲压方式成型。
本实施例中，动力电池总成还包括密封件19，密封件19设于下箱体11和上箱体13之间，以实现密封。
本实施例中，请参照图5和图6，电芯堆15包括电芯组151、端板153、分隔板155、线束隔离板157和顶板159。电芯组151包括多个电芯1512。两个端板153分别设于电芯组151的两端。分隔板155设于相邻电芯1512之间。线束隔离板157设于电芯组151的顶部，顶板159覆盖于线束隔离板157远离电芯组151的一侧。其中，端板153为注塑板，电芯组151的侧面和底面均外露。通过将端板设计为注塑板，且取消了侧板和底板，使得电芯组的侧面和底面外露，减少了电芯堆的组成部件，简化了电芯堆的结构，可大大减轻电芯堆的重量，从而提高了电芯堆的集成度和能量密度；同时，避免采用金属端板、侧板和底板，可起到良好的防热失控的效果，也能防止拉弧现象的发生；并且，电芯组的底面外露，可使电芯直接与冷却板接触，以获得更好的冷却效果。
具体地，多个电芯1512分为两列，每列设有多个电芯1512，两列电芯每两个电芯1512一一并排设置。具体在本实施例中，每列电芯设有6个或7个，也就是说，电芯堆包括12或14个电芯1512。可以理解，电芯1512的数量也可根据实际情况增减。具体地，电芯1512为方形电芯。更具体地，电芯1512的尺寸为长190mm~200mm，厚45mm~55mm，高90mm~120mm，当然也不以此为限。
具体地，请参阅图7，端板153包括朝向电芯组151的内侧面和背向电芯组151的外侧面，外侧面上设有导向限位结构1532。具体地，导向限位结构1532垂直于电芯组151的顶面而设，也就是说，导向限位结构1532沿电芯堆的高度方向设置。具体地，两个导向限位结构1532间隔平行设置。导向限位结构1532可与下箱体11的导槽1164配合，一方面可引导电芯堆放入箱体内，另一方面可在电芯堆组装至箱体后对电芯堆进行横向定位，避免电芯堆左右晃动，提高电池包的安全性。
具体地，端板153的外侧面上还设有第一凸起1534，第一凸起1534的高度小于导向限位结构1532，第一凸起1534与下箱体11的横梁116贴合。具体地，第一凸起1534为多个。更具体地，第一凸起1534垂直于电芯组151的顶面而设。多个第一凸起1534间隔平行设置。通过设置第一凸起1534，可方便将电芯堆组装至电池包时，方便机械式抓取电芯堆，同时，第一凸起1534与电池包的箱体贴合，可实现电芯堆的前后限位，避免电芯堆前后晃动，提高电池包的安全性。
具体地，端板153的外侧面上还设有护套1538，护套1538上内嵌有连接件1539，线束隔离板157上设有与电芯1512的极耳电性连接的连接线路和极柱1572，极柱1572电性连接于护套1538上的连接件1539，护套1538延伸至横梁116的上方。通过此结构，可将外部铜排布设在对应横梁116的位置，利于铜排的空间布置。具体地，连接件1539为导电部件；两个护套1538设于靠近端板153的顶部的位置。
以上仅是本申请的较佳实施例而已，并非对本申请作任何形式上的限制，虽然本申请已以较佳实施例揭露如上，然而并非用以限定本申请，任何熟悉本专业的技术人员，在不脱离本申请技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本申请技术方案内容，依据本申请的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本申请技术方案的范围内。

Claims (10)

  1. 一种动力电池总成，其中，包括下箱体（11）、上箱体（13）和多个电芯堆（15），所述下箱体（11）和所述上箱体（13）扣合并固定连接，所述电芯堆（15）设于所述下箱体（11）和所述上箱体（13）扣合形成的空腔内，所述电芯堆（15）设于所述冷却板（112）的表面上，所述电芯堆（15）包括电芯组（151），所述电芯组（151）包括多个所述电芯（1512），所述电芯组（151）的侧面和底面均外露，且所述电芯组（151）的所述电芯（1512）与所述冷却板（112）接触。
  2. 如权利要求1所述的动力电池总成，其中，所述下箱体（11）包括冷却板（112）和固定连接于所述冷却板（112）的框体（113），所述框体（113）包括两个相对的侧壁（114）、两个相对的端壁（115）、连接于两个所述侧壁（114）之间的横梁（116）和纵梁（117），两个所述端壁（115）分别设于所述侧壁（114）的两端，多个所述横梁（116）相互平行间隔设置，多个所述纵梁（117）相互平行间隔设置，所述横梁（116）与所述纵梁（117）垂直相交，从而将所述下箱体（11）的所述冷却板（112）和所述侧壁（114）、所述端壁（115）围成的空间分隔为多个容纳腔（119），所述容纳腔（119）内容纳所述电芯堆（15）。
  3. 如权利要求2所述的动力电池总成，其中，其中一个所述端壁（115）上设有多个连接位，所述端壁（115）的所述连接位上集中安装有多个电子器件；所述上箱体（13）的一端开设有维修口，所述维修口与所述电子器件的位置对应，所述维修口处盖设有盖体（132），所述盖体（132）向远离所述下箱体（11）的一侧凹陷。
  4. 如权利要求2所述的动力电池总成，其中，所述下箱体（11）的所述横梁（116）包括第一横梁（121）和第二横梁（123），所述第一横梁（121）的宽度大于所述第二横梁（123）的宽度；所述第一横梁（121）的顶部设有限位块（1212）。
  5. 如权利要求4所述的动力电池总成，其中，所述端壁（115）和所述第二横梁（123）之间间隔一定距离，且所述端壁（115）和所述第二横梁（123）之间设有支撑柱（125）；所述纵梁（117）的顶部设有连接柱（1172），所述连接柱（1172）固定连接于所述上箱体（13）。
  6. 如权利要求2所述的动力电池总成，其中，所述下箱体（11）还包括护板（127），所述护板（127）设于所述冷却板（112）远离所述电芯堆（15）的一侧。
  7. 如权利要求1所述的动力电池总成，其中，所述上箱体（13）上还设有上箱体横梁（134）和上箱体纵梁（136），所述上箱体横梁（134）固定连接于所述上箱体（13）远离所述下箱体（11）的一侧，所述上箱体纵梁（136）固定连接于所述上箱体（13）的两侧，所述上箱体横梁（134）上设有用于固定车辆座椅的固定座（1342）。
  8. 如权利要求2所述的动力电池总成，其中，所述电芯堆（15）还包括端板（153）、线束隔离板（157）和顶板（159），两个所述端板（153）分别设于所述电芯组（151）的两端，所述线束隔离板（157）设于所述电芯组（151）的顶部，所述顶板（159）覆盖于所述线束隔离板（157）远离所述电芯组（151）的一侧；所述端板（153）包括朝向所述电芯组（151）的内侧面和背向所述电芯组（151）的外侧面，所述外侧面上设有导向限位结构（1532）；所述横梁（116）朝向所述容纳腔（119）的侧壁上还开设导槽（1164），所述导向限位结构（1532）与所述下箱体（11）的所述导槽（1164）配合。
  9. 如权利要求8所述的动力电池总成，其中，所述端板（153）的外侧面上还设有第一凸起（1534），所述第一凸起（1534）的高度小于所述导向限位结构（1532），所述第一凸起（1534）与所述下箱体（11）的所述横梁（116）贴合。
  10. 如权利要求8所述的动力电池总成，其中，所述端板（153）的外侧面上还设有护套（1538），所述护套（1538）上内嵌有连接件（1539），所述线束隔离板（157）上设有与所述电芯（1512）的极耳电性连接的连接线路和极柱（1572），所述极柱（1572）电性连接于所述护套（1538）上的所述连接件（1539），所述护套（1538）延伸至所述横梁（116）的上方。
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