WO2021000340A1 - 电池下箱体及电池系统 - Google Patents

电池下箱体及电池系统 Download PDF

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Publication number
WO2021000340A1
WO2021000340A1 PCT/CN2019/095564 CN2019095564W WO2021000340A1 WO 2021000340 A1 WO2021000340 A1 WO 2021000340A1 CN 2019095564 W CN2019095564 W CN 2019095564W WO 2021000340 A1 WO2021000340 A1 WO 2021000340A1
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WO
WIPO (PCT)
Prior art keywords
battery
lower box
fixing
positioning
battery lower
Prior art date
Application number
PCT/CN2019/095564
Other languages
English (en)
French (fr)
Inventor
陈玉超
戴晓汕
Original Assignee
江苏时代新能源科技有限公司
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 江苏时代新能源科技有限公司, 宁德时代新能源科技股份有限公司 filed Critical 江苏时代新能源科技有限公司
Priority to EP19753233.6A priority Critical patent/EP3787059B1/en
Priority to US16/487,031 priority patent/US11699827B2/en
Publication of WO2021000340A1 publication Critical patent/WO2021000340A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Definitions

  • This application relates to the technical field of power batteries, in particular to a battery lower box and a battery system.
  • the lower case can be made by using new materials, such as high-strength aluminum alloy, magnesium alloy and composite materials, but the material cost is relatively high; on the other hand, it can be made by improving the production process
  • the lower box body such as aluminum alloy die-casting and aluminum alloy stamping tailor-welding process, but the mold investment risk is greater, and the cavity aluminum alloy profile tailor-welding process has more welds, poor air tightness, and light weight is not ideal problem. Therefore, how to balance the contradiction between the lightweight effect and cost of the lower box of the vehicle battery system has become an urgent problem to be solved.
  • the purpose of this application is to provide a lower battery box and a battery system, which meets the load-bearing requirements and is also lighter in weight.
  • an embodiment of the present application provides a battery lower box, which includes: a support frame, including a plurality of fixed beams connected end to end to form a receiving space, wherein the two fixed beams arranged oppositely are upper A fixing part extending toward the accommodating space is respectively provided, a side of the plurality of fixing beams away from the accommodating space is provided with a fixing ear, the battery lower box is connected with the target object through the fixing ear; the bottom plate is connected with the plurality of fixing beams.
  • an embodiment of the present application also provides a battery system, which includes any battery lower box body as described above; a cover body that covers the battery lower box body and forms an accommodating cavity with the accommodating space; A plurality of battery modules are accommodated in the accommodating cavity.
  • the battery module includes a plurality of single cells and a frame for fixing the plurality of single cells.
  • the frame is provided with a plurality of positioning columns, and the frame passes through the plurality of positioning columns and the battery lower box The fixed part is connected.
  • the battery lower box provided by the embodiment of the present application carries the weight of the battery module through the fixing part of the support frame, and fixes the battery module to the target object through the fixing ears, and the bottom plate does not carry weight and is only used to isolate the external environment Therefore, the weight and processing cost of the lower battery box can be minimized.
  • the battery system provided in the embodiments of the present application adopts the battery lower box as described above, and the overall weight is relatively light. Applying it to new energy vehicles will help to improve the energy saving and weight reduction of new energy electric vehicles, and improve new energy efficiency. The cruising range of energy electric vehicles.
  • FIG. 1 is a schematic diagram of an exploded structure of a lower battery box provided by an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of another battery lower box provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of the structure of the reinforcing beam of the lower battery box in FIG. 2;
  • FIG. 4 is a schematic diagram of an enlarged structure of area A in FIG. 3;
  • FIG. 5 is a schematic structural diagram of a battery system provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an exploded structure of the battery system shown in FIG. 5;
  • FIG. 7 is a schematic diagram of an enlarged structure of area B in FIG. 5;
  • Fig. 8 is a schematic side view of the battery system shown in Fig. 5 with the cover removed;
  • FIG. 9 is a schematic diagram of an enlarged structure of area C in FIG. 8;
  • FIG. 10 is a schematic diagram of an enlarged structure of area D in FIG. 8.
  • 11-support frame 110-fixed beam; 111-fixed part; 111a-first positioning hole; 112-fixed ear;
  • 3-battery module 31-single cell; 32-end plate; 321-positioning post; 33-side plate;
  • an embodiment of the present application provides a lower battery box 1, which includes a supporting frame 11 and a bottom plate 12.
  • the support frame 11 includes a plurality of fixed beams 110 connected end to end to form the accommodating space 10, wherein two fixed beams 110 opposite to each other are respectively provided with a fixing portion 111 extending toward the accommodating space 10, and the plurality of fixed beams 110 are far away
  • One side of the space 10 is provided with a fixing ear 112, and the battery lower box 1 is connected to the target object through the fixing ear 112.
  • the target object may be, for example, but not limited to, the chassis of a vehicle.
  • the supporting frame 11 may be a polygonal frame composed of four, six or eight fixed beams 110, and the fixed portion 111 may carry a carrier with a certain weight placed in the containing space 10.
  • the fixing ear 112 is provided with a through hole, and a plurality of fasteners can be used to fix the battery lower case 1 to a target object.
  • the bottom plate 12 is connected to the plurality of fixed beams 110, and the bottom plate 12 can be connected to the plurality of fixed beams 110 by any method such as welding, riveting, screw fastening or structural adhesive bonding.
  • the fixed beam 110 is a structural member made of aluminum profiles, such as tailor-welded or die-cast aluminum profiles, which can reduce the weight of the support frame 11 while meeting structural strength.
  • the bottom plate 12 is a plate made of aluminum alloy or carbon steel.
  • the battery lower box 1 compared with the traditional carbon steel or aluminum alloy stamping or die-casting of the lower battery box 1 structure, the battery lower box 1 provided by the embodiments of the present application has no large one-time investment risk, lower cost, and lower weight. Light weight, simpler forming process, fewer welds, better air tightness, and lower manufacturing costs.
  • the battery lower box 1 provided by the embodiment of the present application bears weight through the fixing portion 111 of the support frame 11, and the battery lower box 11 is fixed to the target object through the fixing ears 112, and the bottom plate 12 does not carry weight and is only used for The external environment is isolated, so that the weight and processing cost of the lower battery box 1 can be minimized.
  • the support frame 11 is also It includes a reinforcing beam 13 arranged in the accommodating space 10.
  • a plurality of fixing rods 133 are arranged on the reinforcing beam 13, and the lower battery box 1 is also connected to the target object through the fixing rods 133.
  • the number of reinforcing beams 13 may be one or more, depending on the number of carriers that the lower battery box 1 needs to carry.
  • the reinforcing beam 13 includes a support portion 131 and a suspension portion 132 intersecting.
  • the support portion 131 is located in a horizontal plane
  • the suspension portion 132 is located in a vertical plane
  • the fixing rod 133 is arranged through the support portion 131 and the suspension portion 132 to The connection tightness of the fixed rod 133 and the reinforcing beam 13 is improved.
  • the reinforcing beam 13 may be connected to the bottom plate 12 by any method such as welding, riveting or structural adhesive bonding.
  • the fixing rod 133 is a rod with a hollow inside, and the bottom plate 12 is provided with a first through hole 121 corresponding to the fixing rod 133, and the fixing rod 133 is away from the support portion
  • One end of 131 is provided with an internal thread 133a for threaded connection with other components.
  • the fixing rod 133 is further provided with a shoulder portion 133b on the outer periphery of one end away from the supporting portion 131, and a groove 133c capable of accommodating the sealing member is arranged in the shoulder portion 133b.
  • a groove 133c capable of accommodating the sealing member is arranged in the shoulder portion 133b.
  • an O-ring may be arranged in the groove 133c.
  • the fixing rod 133 is arranged hollow inside, which can reduce the weight, and is also convenient to set the internal thread 133a, and when other parts are threadedly connected with the fixing rod 133, a sealed connection between the two can be realized through a seal. At the same time, it is also convenient for fasteners (such as long bolts) to pass through the first through hole 121 and the fixing rod 133 and connect to the target object.
  • fasteners such as long bolts
  • the fixing rod 133 may also be a solid rod, and an end of the fixing rod 133 away from the support portion is provided with an external thread, and the lower battery case 1 can also be connected to the target object through the external thread.
  • An embodiment of the present application also provides a battery system, which includes any battery lower case 1, a cover 2 and a plurality of battery modules 3 as described above.
  • the cover 2 covers the lower battery box 1 and forms a containing cavity with the containing space 10.
  • the cover 2 may be made of aluminum alloy material or plastic material.
  • Each battery module 3 includes a plurality of single batteries 31 and a frame for fixing the plurality of single batteries 31.
  • the frame is provided with a plurality of positioning posts 321, and the frame passes through a plurality of positioning
  • the column 321 is connected to the fixing portion 111 of the lower battery box 1.
  • the battery system provided by the embodiment of the present application adopts any battery lower case 1 as described above, and has a lighter overall weight. Applying it to a new energy vehicle will help improve the energy saving and weight reduction of the new energy electric vehicle. Improve the cruising range of new energy electric vehicles.
  • the battery module 3 has a variety of frame structure forms.
  • the frame includes a pair of end plates 32 arranged on the outer side of the plurality of single cells 31 and oppositely arranged, and a pair of end plates 32 that cooperate with the pair of end plates 32 to accommodate the plurality of cells.
  • the positioning column 321 may be provided on the end plate 32 or on the side plate 33 or on the end plate 32 and the side plate 33.
  • the frame includes a pair of end plates 32 arranged on the outside of the plurality of single batteries 31 and oppositely arranged, and a cable tie surrounding the pair of end plates 32 and the plurality of single batteries 31. 31 are connected in groups, and positioning posts 321 are arranged on the end plate 32.
  • the end plate 32 may be a plate with uniform wall thickness or a plate with non-uniform wall thickness.
  • each end plate 32 is provided with two positioning posts 321 spaced apart, and a fixing member such as a bolt passes through the positioning posts 321 to stably fix the battery module 3 on the fixing portion 111 of the lower battery box 1 .
  • FIG. 8 shows a schematic side view of the structure of the battery system shown in FIG. 5 with the cover removed
  • FIG. 9 is a schematic diagram of an enlarged structure of area C in FIG. 8
  • FIG. 10 is a schematic diagram of an enlarged structure of area D in FIG. 8.
  • the gap between the bottom plate 12 of the battery lower box 1 facing the accommodating space and the bottom surface of the battery module 3 is H, and 2mm ⁇ H ⁇ 5mm.
  • the gap H can absorb the impact of the ground on the bottom of the battery lower case 1, prevent the battery module 3 from being impacted, and improve the safety of the battery system. If the H value is small, the bottom plate 12 of the battery lower box 1 does not have enough space for buffering energy, and if the H value is large, the internal space of the battery lower box 1 will be wasted too much.
  • the fixing portion 111 is provided with a plurality of first positioning holes 111a, and the positioning pillars 321 are arranged corresponding to the first positioning holes 111a; the gap between the positioning pillar 321 and the adjacent fixed beam 110 is W1, and the thickness of the positioning pillar 321 is W2, the width of the fixed portion 111 is W, then W ⁇ W1+W2. Since there is a gap H between the bottom plate 12 of the lower battery box 1 and the bottom surface of the battery module 3, the weight of the battery module 3 is directly fixed to the fixing portion 111 of the lower battery box 1 by the positioning column 321, if W ⁇ W1+ W2, the positioning post 321 at the end plate 32 of the battery module 3 is suspended and the battery module 3 is stressed and the reliability is poor.
  • the frame 11 of the lower battery box 1 further includes a reinforcing beam 13
  • the frame is connected to the fixing portion 111 of the battery lower box 1 through the positioning column 321 of one of the end plates 32, and is connected to the fixing portion 111 of the battery lower box 1 through the positioning column 321 of the other end plate 32. It is connected to the supporting portion 131 of the battery lower case 1.
  • the supporting portion 131 of the reinforcing beam 13 is located on both sides of the suspension portion 132 and is provided with a plurality of second positioning holes 131a along the length direction.
  • a part of the plurality of positioning pillars 321 corresponds to the first positioning hole 111a.
  • another part of the positioning post 321 is corresponding to the second positioning hole 131a.
  • the gap between the positioning column 321 and the adjacent suspension portion 132 is W1'
  • the thickness of the positioning column 321 is W2
  • the width of the support portion 131 on the side of the suspension portion 132 is W', then the width W'of the support portion 131 satisfies the following Condition: W' ⁇ W1'+W2.
  • the plurality of second positioning holes 131a arranged in a row on the side of the suspension portion 132 of the support portion 131 and the plurality of first positioning holes 111a arranged in a row of the fixing portion 111 are used to fix the plurality of battery modules 3 together.
  • the cover 2 is provided with a second through hole 21 corresponding to the fixing rod 133 of the reinforcing beam 13.
  • the battery system further includes a fixing member 4, which includes a base 41 connected to each other. And the extension shaft 42, the extension shaft 42 passes through the second through hole 21 of the cover 2 and is connected to the fixing rod 133 in a sealed manner.
  • the shoulder 133b of the fixing rod 133 abuts against the inner wall of the cover 2
  • the extension shaft 42 of the fixing member 4 has an external thread
  • the groove 133c of the fixing rod 133 is provided with a sealing element.
  • the fixing member 4 may also be provided with a through hole that penetrates the base 41 and the extension shaft 42.
  • the bottom plate 12, the fixing rod 133, and the fixing member 4 of the battery lower case 1 are penetrated along the axial direction of the fixing rod 133. Therefore, longer bolts can be used to sequentially pass through the first through hole 121, the fixing rod 133 and the fixing member 4 from the bottom plate 12 side of the battery lower box 1 to fix the battery system to the target object.
  • the long bolts tightly connect the bottom plate 12 with the reinforcing beam 13, which is beneficial to further improve the air tightness of the battery system.
  • the through hole of the extension shaft 42 of the fixed part 4 may also be provided with an internal thread, and the extension shaft 42 penetrates It passes through the second through hole 21 of the cover 2 and is connected to the fixing rod 133 in a sealed manner.

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

Abstract

本申请涉及一种电池下箱体及电池系统，该电池下箱体包括：支撑骨架，包括首尾依次连接以形成容纳空间的多个固定梁，其中，相对设置的两个固定梁上分别设置有朝向容纳空间延伸的固定部，多个固定梁远离容纳空间的一侧设置有固定耳，电池下箱体通过固定耳与目标物体连接；底板，与多个固定梁连接。本申请通过支撑骨架的固定部承载电池模组的重量，通过固定耳将电池模组固定至车辆上，而底板仅用于隔离外界环境，从而可以最大化地降低电池下箱体的重量及成本。

Description

电池下箱体及电池系统
相关申请的交叉引用
本申请要求享有于2019年07月03日提交的名称为“电池下箱体及电池系统”的中国专利申请201921023624.X的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及动力电池技术领域，特别是涉及一种电池下箱体及电池系统。
背景技术
随着新能源车辆在市场中的份额占比越来越大，如何降低车载电池系统重量及成本成为目前重要的研究发展方向。为了实现车载电池系统的轻量化，一方面可以通过采用新型材料来制作下箱体，例如高强度铝合金、镁合金及复合材料，但材料成本较高；另一方面可以通过改进生产工艺来制作下箱体，例如铝合金压铸及铝合金冲压拼焊工艺，但模具投资风险较大，而空腔铝合金型材拼焊工艺存在焊缝较多、气密性较差及轻量化还不够理想的问题。因此，如何平衡车载电池系统的下箱体的轻量化效果与成本之间的矛盾成为亟待解决的问题。
发明内容
本申请的目的是提供一种电池下箱体及电池系统，该电池下箱体在满足承载要求的同时其重量也较轻。
一方面，本申请实施例提供了一种电池下箱体，该电池下箱体包括：支撑骨架，包括首尾依次连接以形成容纳空间的多个固定梁，其中，相对设置的两个固定梁上分别设置有朝向容纳空间延伸的固定部，多个固定梁 远离容纳空间的一侧设置有固定耳，电池下箱体通过固定耳与目标物体连接；底板，与多个固定梁连接。
另一方面，本申请实施例还提供了一种电池系统，其包括如前所述的任一种电池下箱体；盖体，盖合于电池下箱体，并与容纳空间形成容纳腔；多个电池模组，容纳于容纳腔，电池模组包括多个单体电池和固定多个单体电池的框架，框架上设置有多个定位柱，框架通过多个定位柱与电池下箱体的固定部连接。
本申请实施例提供的电池下箱体，通过支撑骨架的固定部承载电池模组的重量，并通过固定耳将电池模组固定至目标物体上，而底板不承载重量，仅用于隔离外界环境，从而可以最大化地降低电池下箱体的重量及加工成本。另外，本申请实施例提供的电池系统，采用如前所述的电池下箱体，整体重量较轻，将其应用于新能源车辆上，有利于改善新能源电动车的节能减重，提高新能源电动车的续航里程。
附图说明
从下面结合附图对本申请的具体实施方式的描述中可以更好地理解本申请，其中：
通过阅读以下参照附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显,其中，相同或相似的附图标记表示相同或相似的特征。
图1是本申请实施例提供的一种电池下箱体的分解结构示意图；
图2是本申请实施例提供的另一种电池下箱体的结构示意图；
图3是图2中的电池下箱体的加强梁的结构示意图；
图4是图3中的区域A的放大结构示意图；
图5是本申请实施例提供的一种电池系统的结构示意图；
图6是图5所示的电池系统的分解结构示意图；
图7是图5中区域B的放大结构示意图；
图8是图5所示的电池系统去掉盖体后的侧视结构示意图；
图9是图8中的区域C的放大结构示意图；
图10是图8中的区域D的放大结构示意图。
其中：
1-电池下箱体；
10-容纳空间；
11-支撑骨架；110-固定梁；111-固定部；111a-第一定位孔；112-固定耳；
12-底板；121-第一通孔；
13-加强梁；131-支撑部；131a-第二定位孔；132-悬挂部；133-固定杆；133a-内螺纹；133b-肩部；133c-凹槽；
2-盖体；21-第二通孔；
3-电池模组；31-单体电池；32-端板；321-定位柱；33-侧板；
4-固定件；41-底座；42-伸出轴。
具体实施方式
现在将参考附图更全面地描述示例实施方式。
参阅图1，本申请实施例提供了一种电池下箱体1，其包括：支撑骨架11和底板12。
支撑骨架11包括首尾依次连接以形成容纳空间10的多个固定梁110，其中，相对设置的两个固定梁110上分别设置有朝向容纳空间10延伸的固定部111，多个固定梁110远离容纳空间10的一侧设置有固定耳112，电池下箱体1通过固定耳112与目标物体连接。该目标物体可以为例如但不限于车辆的底盘。
支撑骨架11可以为四个、六个或者八个固定梁110组成的多边形框架，固定部111可以承载放置于容纳空间10内的具有一定重量的载体。固定耳112上设置有通孔，可以通过多个紧固件将电池下箱体1固定至目标物体。
底板12与多个固定梁110连接，底板12可以通过焊接、铆接、螺钉紧固或者结构胶粘接等任一种方式连接至多个固定梁110。
可选地，固定梁110为由铝型材制作的结构件，例如铝合金型材拼焊或者压铸成型，在满足结构强度的同时降低支撑骨架11的重量。另外，底板12为由铝合金或者碳钢制作的板件。
由此，相较于传统的碳钢或铝合金冲压或者压铸成型的电池下箱体1结构，本申请实施例提供的电池下箱体1无大型的一次性投资风险，成本较低、重量较轻，成型工艺更简单，焊缝较少，气密性较好，降低了制造成本。
本申请实施例提供的电池下箱体1，通过支撑骨架11的固定部111承载重量，并通过固定耳112将电池下箱体11固定至目标物体上，而底板12不承载重量，仅用于隔离外界环境，从而可以最大化地降低电池下箱体1的重量及加工成本。
请一并参阅图2和图3，当电池下箱体1需要承载较多数量的物体时，可以排成两排或者两排以上，为了提高电池下箱体1的承载能力，支撑骨架11还包括设置于容纳空间10内的加强梁13，加强梁13上设置有多个固定杆133，电池下箱体1还通过固定杆133与目标物体连接。加强梁13的数量可以为一个或者更多个，根据电池下箱体1需要承载的载体数量而定。
具体来说，加强梁13包括相交设置的支撑部131和悬挂部132，例如支撑部131位于水平面内，悬挂部132位于竖直平面内，固定杆133贯穿支撑部131和悬挂部132设置，以提高固定杆133与加强梁13的连接紧固性。加强梁13可以通过焊接、铆接或者结构胶粘接等任一种方式连接至底板12。
请一并参阅图1、图3和图4，可选地，固定杆133为内部中空的杆件，底板12上设置有对应于固定杆133的第一通孔121，固定杆133远离支撑部131的一端设置有内螺纹133a，用于与其它部件螺纹连接。
进一步地，固定杆133远离支撑部131的一端外周还设置有肩部133b，肩部133b内设置有能够容纳密封件的凹槽133c，例如，凹槽133c内可以设置O型圈。
固定杆133内部中空设置，可以减轻重量，还便于设置内螺纹133a， 并且当其它部件与固定杆133螺纹连接时，通过密封件可以实现二者的密封连接。同时，也便于紧固件(例如长螺栓)穿过第一通孔121及固定杆133，并与目标物体连接。
可以理解的是，固定杆133也可为实心杆件，固定杆133远离支撑部的一端设置外螺纹，通过该外螺纹也可以将电池下箱体1与目标物体连接。
请一并参阅图5至图10，本申请实施例还提供了一种电池系统，其包括：如前所述的任一种电池下箱体1、盖体2和多个电池模组3。
盖体2盖合于电池下箱体1，并与容纳空间10形成容纳腔。为了减轻重量，盖体2可以由铝合金材料或者塑料材料制作而成。
多个电池模组3容纳于容纳腔，每个电池模组3包括多个单体电池31和固定多个单体电池31的框架，框架上设置有多个定位柱321，框架通过多个定位柱321与电池下箱体1的固定部111连接。
本申请实施例提供的电池系统，采用如前所述的任一种电池下箱体1，整体重量较轻，将其应用于新能源车辆中，有利于改善新能源电动车的节能减重，提高新能源电动车的续航里程。
电池模组3的框架结构形式有多种，可选地，框架包括设置在多个单体电池31外侧且相对布置的一对端板32和与一对端板32配合以容纳多个单体电池31的侧板33。定位柱321可以设置于端板32上，也可以设置于侧板33上，还可以设置于端板32和侧板33上。
可选地，框架包括设置在多个单体电池31外侧且相对布置的一对端板32和环绕一对端板32和多个单体电池31的扎带，扎带将多个单体电池31成组连接，定位柱321设置于该端板32上。
端板32可以为均匀壁厚的板件，也可以为非均匀壁厚的板件。可选地，每个端板32上设置有间隔分布的两个定位柱321，固定件如螺栓穿过定位柱321以将电池模组3稳定地固定于电池下箱体1的固定部111上。
图8示出了图5所示的电池系统去掉盖体后的侧视结构示意图，图9是图8中的区域C的放大结构示意图，图10是图8中的区域D的放大结构示意图。
电池下箱体1的底板12朝向容纳空间的一侧与电池模组3的底面之间的间隙为H，且2mm<H<5mm。间隙H可以吸收地面对电池下箱体1底部的冲击，防止电池模组3受到冲击，提高了电池系统的安全性。如果H值较小，则电池下箱体1的底板12没有足够的空间进行缓冲吸能，若H值较大，会过多的浪费电池下箱体1的内部空间尺寸。
进一步地，固定部111设置有多个第一定位孔111a，定位柱321与第一定位孔111a对应设置；定位柱321与邻近的固定梁110之间的间隙为W1，定位柱321的厚度为W2，固定部111的宽度为W，则W≥W1+W2。由于电池下箱体1的底板12与电池模组3的底面之间有间隙H，电池模组3的重量由定位柱321直接固定到电池下箱体1的固定部111，如果W＜W1+W2，则电池模组3的端板32处的定位柱321悬空设置，电池模组3受力恶化，可靠性较差。
当电池下箱体1的支撑骨架11还包括加强梁13时，框架通过其中一个端板32的定位柱321与电池下箱体1的固定部111连接，通过另一个端板32的定位柱321与电池下箱体1的支撑部131连接。
具体来说，加强梁13的支撑部131位于悬挂部132的两侧沿长度方向分别设置有多个第二定位孔131a，多个定位柱321中的一部分定位柱321与第一定位孔111a对应设置，另一部分定位柱321与第二定位孔131a对应设置。定位柱321与邻近的悬挂部132之间的间隙为W1’，定位柱321的厚度为W2，支撑部131位于悬挂部132一侧的宽度为W’，则支撑部131的宽度W’满足如下条件：W’≥W1’+W2。由此，支撑部131位于悬挂部132一侧成列布置的多个第二定位孔131a与固定部111成列布置的多个第一定位孔111a一并用于固定多个电池模组3。
另外，如图5和图6所示，盖体2上设置有对应于加强梁13的固定杆133的第二通孔21，电池系统还包括固定件4，固定件4包括相互连接的底座41和伸出轴42，伸出轴42穿过盖体2的第二通孔21并与固定杆133密封连接。
具体地，固定杆133的肩部133b抵靠至盖体2的内壁，固定件4的伸出轴42具有外螺纹，同时固定杆133的凹槽133c内设置有密封件，当伸 出轴42穿过盖体2的第二通孔21与固定杆133螺纹连接时，底座41压合该密封件，从而可以提高盖体2的第二通孔21处的气密性。
可选地，固定件4上还可以设置贯穿底座41和伸出轴42的通孔，由此，电池下箱体1的底板12、固定杆133及固定件4沿固定杆133的轴向为贯通的，故可以采用较长的螺栓从电池下箱体1的底板12一侧依次穿过第一通孔121、固定杆133及固定件4后将电池系统固定至目标物体。同时，长螺栓将底板12与加强梁13紧密连接，有利于进一步提高电池系统的气密性。
可以理解的是，当固定杆133为实心杆件且固定杆133远离支撑部的一端设置外螺纹时，固定件4的伸出轴42的通孔上还可以设置内螺纹，伸出轴42穿过盖体2的第二通孔21并与固定杆133密封连接。
本领域技术人员应能理解，上述实施例均是示例性而非限制性的。在不同实施例中出现的不同技术特征可以进行组合，以取得有益效果。本领域技术人员在研究附图、说明书及权利要求书的基础上，应能理解并实现所揭示的实施例的其他变化的实施例。在权利要求书中，术语“包括”并不排除其他装置或步骤；不定冠词“一个”不排除多个；术语“第一”、“第二”用于标示名称而非用于表示任何特定的顺序。权利要求中的任何附图标记均不应被理解为对保护范围的限制。权利要求中出现的多个部分的功能可以由一个单独的硬件或软件模块来实现。某些技术特征出现在不同的从属权利要求中并不意味着不能将这些技术特征进行组合以取得有益效果。

Claims (10)

  1. 一种电池下箱体，其中，包括：
    支撑骨架，包括首尾依次连接以形成容纳空间的多个固定梁，其中，相对设置的两个固定梁上分别设置有朝向所述容纳空间延伸的固定部，多个所述固定梁远离所述容纳空间的一侧设置有固定耳，所述电池下箱体通过所述固定耳与目标物体连接；
    底板，与多个所述固定梁连接。
  2. 根据权利要求1所述的电池下箱体，其中，所述支撑骨架还包括设置于所述容纳空间内的加强梁，所述加强梁上设置有多个固定杆，所述电池下箱体还通过所述固定杆与所述目标物体连接。
  3. 根据权利要求2所述的电池下箱体，其中，所述加强梁包括相交设置的支撑部和悬挂部，所述固定杆贯穿所述支撑部和所述悬挂部设置。
  4. 根据权利要求3所述的电池下箱体，其中，所述固定杆为内部中空的杆件，所述底板上设置有对应于所述固定杆的第一通孔，所述固定杆远离所述支撑部的一端设置有内螺纹；
    所述固定杆远离所述支撑部的一端外周还设置有肩部，所述肩部内设置有能够容纳密封件的凹槽。
  5. 一种电池系统，其中，包括：
    如权利要求1至4任一项所述的电池下箱体；
    盖体，盖合于所述电池下箱体，并与所述容纳空间形成容纳腔；
    多个电池模组，容纳于所述容纳腔，所述电池模组包括多个单体电池和固定多个所述电池单体的框架，所述框架上设置有多个定位柱，所述框架通过多个所述定位柱与所述电池下箱体的所述固定部连接。
  6. 根据权利要求5所述的电池系统，其中，所述电池下箱体的所述底板朝向所述容纳空间的一侧与所述电池模组的底面之间的间隙为H，且2mm<H<5mm。
  7. 根据权利要求5或6所述的电池系统，其中，所述框架包括设置在多个所述单体电池外侧且相对布置的一对端板和与所述一对端板配合以容纳多个所述单体电池的侧板；
    或者，框架包括设置在多个所述单体电池外侧且相对布置的一对端板和环绕一对所述端板和多个所述单体电池的扎带；
    所述定位柱至少设置于所述端板上。
  8. 根据权利要求5至7任一项所述的电池系统，其中，所述电池下箱体的所述固定部设置有多个第一定位孔，所述定位柱与所述第一定位孔对应设置；
    所述定位柱与邻近的所述固定梁之间的间隙为W1，所述定位柱的厚度为W2，所述固定部的宽度为W，则W≥W1+W2。
  9. 根据权利要求8所述的电池系统，其中，当所述电池下箱体的所述支撑骨架还包括所述加强梁时，所述加强梁的支撑部位于悬挂部的两侧沿所述长度方向分别设置有多个第二定位孔，多个所述定位柱中的一部分所述定位柱与所述第一定位孔对应设置，另一部分所述定位柱与所述第二定位孔对应设置；
    所述定位柱与邻近的所述悬挂部之间的间隙为W1’，所述定位柱的厚度为W2，所述支撑部位于所述悬挂部一侧的宽度为W’，则W’≥W1’+W2。
  10. 根据权利要求9所述的电池系统，其中，所述盖体上进一步设置有对应于加强梁的所述固定杆的第二通孔，所述电池系统还包括固定件，所述固定件包括相互连接的底座和伸出轴，所述伸出轴穿过所述第二通孔并与所述固定杆密封连接。
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230106602A1 (en) * 2021-10-06 2023-04-06 Ford Global Technologies, Llc Traction battery enclosure reinforcement assembly and reinforcing method

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KR20220094758A (ko) * 2020-12-29 2022-07-06 에스케이온 주식회사 배터리 모듈
CN113193279B (zh) * 2021-04-29 2022-05-24 合肥国轩高科动力能源有限公司 动力电池模组及其外壳
CN113471607A (zh) * 2021-07-01 2021-10-01 广州小鹏汽车科技有限公司 电池箱体、电池包及电池箱体的装配方法
CN217158490U (zh) * 2022-03-14 2022-08-09 比亚迪股份有限公司 电池包以及车辆
CN116323297A (zh) * 2022-06-29 2023-06-23 宁德时代新能源科技股份有限公司 箱体、电池及用电装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207800720U (zh) * 2018-02-22 2018-08-31 张荣岩 一种电池组安装、限位及散热的箱体结构
CN109920949A (zh) * 2019-02-18 2019-06-21 上海汽车集团股份有限公司 轻量化动力电池箱体

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2104121B1 (en) * 2007-02-16 2011-12-28 Panasonic Corporation Electric storage unit
CN104953055B (zh) * 2014-03-31 2017-10-31 比亚迪股份有限公司 动力电池模组及其电池容纳组件、车辆
JP6523355B2 (ja) * 2017-02-17 2019-05-29 本田技研工業株式会社 車体の下部構造
CN108630843B (zh) * 2017-03-23 2023-10-24 宁德时代新能源科技股份有限公司 电池包防护框架及电池包
CN107742683A (zh) * 2017-09-18 2018-02-27 北京普莱德新能源电池科技有限公司 一种电动汽车用电池箱
CN208674230U (zh) * 2018-09-27 2019-03-29 北京车和家信息技术有限公司 电池包及其下箱体和车辆
CN209176495U (zh) 2018-11-27 2019-07-30 宁德时代新能源科技股份有限公司 电池托盘

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207800720U (zh) * 2018-02-22 2018-08-31 张荣岩 一种电池组安装、限位及散热的箱体结构
CN109920949A (zh) * 2019-02-18 2019-06-21 上海汽车集团股份有限公司 轻量化动力电池箱体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230106602A1 (en) * 2021-10-06 2023-04-06 Ford Global Technologies, Llc Traction battery enclosure reinforcement assembly and reinforcing method
US11973241B2 (en) * 2021-10-06 2024-04-30 Ford Global Technologies, Llc Traction battery enclosure reinforcement assembly and reinforcing method

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