WO2020143194A1 - Structure de plaque inférieure de bloc-batterie, bloc-batterie et véhicule électrique - Google Patents

Structure de plaque inférieure de bloc-batterie, bloc-batterie et véhicule électrique Download PDF

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Publication number
WO2020143194A1
WO2020143194A1 PCT/CN2019/093470 CN2019093470W WO2020143194A1 WO 2020143194 A1 WO2020143194 A1 WO 2020143194A1 CN 2019093470 W CN2019093470 W CN 2019093470W WO 2020143194 A1 WO2020143194 A1 WO 2020143194A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing plate
battery box
plate
welding
plate structure
Prior art date
Application number
PCT/CN2019/093470
Other languages
English (en)
Chinese (zh)
Inventor
徐博豪
汤超龙
刘安龙
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 WO2020143194A1 publication Critical patent/WO2020143194A1/fr

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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
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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 is used in the field of electric vehicles, in particular to a battery box bottom plate structure, a battery box and an electric vehicle.
  • the weight of the battery box is the development trend of the entire electric vehicle battery.
  • the load-bearing requirements of the battery box are also increasing.
  • the battery box also needs to meet the bottom stone strike, bottom scraping, etc.
  • Basic safety performance which poses a major challenge to the battery box and the bottom plate of the battery box.
  • the welding deformation caused by the common extruded profile structure becomes more and more serious.
  • the purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a battery box bottom plate structure, a battery box and an electric vehicle, which can simultaneously achieve the simultaneous improvement of the strength of the box body and the performance of the battery box. Further improve the safety and volume energy density of the entire battery system.
  • a battery box bottom plate structure including a top seal plate, a bottom seal plate and a load-bearing frame, the top seal plate and/or the bottom seal plate is provided with a welding groove Position, the top seal plate and the bottom seal plate are welded at the welding slot, the load-bearing frame is welded to the top seal plate and/or the bottom seal plate at the welding slot, so Several closed spaces are formed between the top-layer sealing plate and the bottom-layer sealing plate.
  • the bottom sealing plate is flat
  • the top sealing plate is provided with a welding slot
  • the top sealing plate and the bottom sealing plate are connected by friction stir welding at the welding slot.
  • the supporting frame is provided with a supporting edge, and the supporting edge is connected with the top sealing plate and/or the bottom sealing plate by friction stir welding.
  • the plurality of enclosed spaces are arranged in a number of horizontal or vertical rows along a straight line or a curve.
  • the bottom sealing plate is provided with a number of reinforcing rib structures on the inner side of the enclosed space.
  • a filler is provided in all or part of the enclosed space.
  • all or part of the top space of the enclosed space is provided with through holes.
  • the filler includes one or more of polyurethane material, silica gel, and butane rubber.
  • a battery box includes the battery box bottom plate structure described in any of the above technical solutions.
  • An electric vehicle includes the battery box described in any one of the above technical solutions.
  • One of the above technical solutions has at least one of the following advantages or beneficial effects: through the innovation of this technical solution, the performance of both the strength of the cabinet and the capacity of the battery box can be simultaneously improved to further improve the safety of the entire battery system Sex and volumetric energy density.
  • the unique layered structure design solves the problems of severe welding deformation and relatively fixed cavity distance caused by common extruded profile structures. Through actively reserved welding slots and flexible top and bottom sealing plates The distance adjustment provides the possibility to actively control the amount of deformation and the thickness distance of the bottom plate of the box.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention
  • FIG. 2 is a partial cross-sectional view of an embodiment shown in FIG. 1;
  • FIG. 3 is a partially enlarged view at A in FIG. 2;
  • FIG. 5 is a partially enlarged view of B in FIG. 4;
  • FIG. 6 is a schematic structural view of another embodiment of the present invention.
  • FIG. 7 is a partial cross-sectional view of an embodiment shown in FIG. 6;
  • FIG. 8 is a partially enlarged view at C in FIG. 7.
  • the meaning of “several” is one or more, the meaning of “multiple” is more than two, “greater than”, “less than”, “exceeded”, etc. are understood as not including this number; “above”, “below” “, “within” Etc. are understood to include this number.
  • first and “second” are only used to distinguish technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features Or implicitly indicate the sequence of the indicated technical features.
  • the words “setup”, “installation”, “connection” and other terms should be understood in a broad sense.
  • they may be directly connected or indirectly connected through an intermediate medium; they may be fixedly connected, or It can be a detachable connection, or it can be integrally formed; it can be a mechanical connection, it can be an electrical connection or can communicate with each other; it can be a connection between two components or an interaction between two components.
  • Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in conjunction with the specific content of the technical solution.
  • an embodiment of the present invention provides a battery box bottom plate structure, including a top sealing plate 1, a bottom sealing plate 2 and
  • the load-bearing frame 3 includes a peripheral frame and/or a middle frame.
  • the top-layer sealing plate 1 and/or the bottom-layer sealing plate 2 are provided with welding slots 4.
  • the top-layer sealing plate 1 and the bottom layer sealing The plate 2 is welded at the welding slot 4, the load-bearing frame 3 and the top sealing plate 1 and/or the bottom sealing plate 2 are welded at the welding slot 4, the top sealing plate 1 is Several closed spaces 5 are formed between the bottom sealing plates 2.
  • the welding slot 4 is used to align the top sealing plate 1 and the bottom sealing plate 2 and the load-bearing frame 3 to the top sealing plate 1 and/or the bottom sealing plate 2 on the one hand, and can also pass through Adjust the parameters such as the position of the welding seam and the welding width to improve the deformation problem during the welding of the box.
  • the volume of the enclosed space 5 can be adjusted according to the welding slot 4 of the bottom sealing plate 2 and/or the top sealing plate 1, the plate thickness and the size of the plate.
  • the performance of both the strength of the cabinet and the capacity of the battery box can be simultaneously improved, and the safety and volume energy density of the entire battery system can be further improved.
  • the unique layered structure design solves the problems of severe welding deformation and relatively fixed cavity distance caused by common extruded profile structures.
  • the bottom layer The distance adjustment between the sealing plates 2 provides the possibility to actively control the amount of deformation and the thickness distance of the bottom plate of the box.
  • the top seal plate 1 and/or the bottom seal plate 2 are provided with Welding slot 4, top sealing plate 1, bottom sealing plate 2 and load-bearing frame 3 can be welded by resistance welding, friction stir welding, etc.
  • the bottom sealing plate 2 is flat and the top sealing plate 1 is provided There is a welding slot 4, and the top sealing plate 1 and the bottom sealing plate 2 are connected by friction stir welding at the welding slot 4. Welding characteristics of the heat-affected zone of the friction stir welding joint are small, and the residual stress is relatively low.
  • the load-bearing frame 3 in order to facilitate the welding of the load-bearing frame 3 and the top-layer sealing plate 1 and/or the bottom-layer sealing plate 2, the load-bearing frame 3 is provided with There is a supporting edge 6 which is connected to the top sealing plate 1 and/or the bottom sealing plate 2 by friction stir welding. That is, the supporting edge 6 is used for positioning with the bottom sealing plate 2 and the top sealing plate 1 when welding and to provide a molten base material during welding, which is convenient for improving the overall welding strength and controlling welding deformation.
  • the arrangement of the enclosed space 5 is correspondingly set according to the battery modules, high-voltage distribution boxes and other components contained in the battery box, such as but not limited to the following forms, the plurality of enclosed spaces 5 are arranged along a straight line or a curve in a number of horizontal
  • the plurality of enclosed spaces 5 are arranged in two horizontal rows along a straight line
  • the plurality of enclosed spaces 5 are arranged in four horizontal rows along a straight line.
  • a plurality of reinforcing rib structures 7 are provided on the inner side of the enclosed space 5 on the bottom sealing plate 2 to improve the strength of the bottom sealing plate 2.
  • the rib structure 7 can be combined with the top sealing plate 1 by changing the depth and shape to isolate a plurality of enclosed spaces 5, so as to selectively enhance the bottom load bearing according to the load bearing situation of the entire box The role.
  • the enclosed space 5 is hollow.
  • all or part of the enclosed space 5 is provided with a filler.
  • the filler is made of polyurethane material, which can be filled into the enclosed space 5 during the welding process, and used to strengthen the strength of the entire bottom plate under harsh working conditions such as bottom scraping and rock strikes.
  • all or part of the top space sealing plate 1 of the enclosed space 5 is provided with a through hole 8.
  • the filler is selected from one or more of polyurethane material, silica gel, butane rubber, and can be filled into the enclosed space 5 through a plurality of through holes 8, compared with other embodiments, this embodiment is more convenient to control the filling of the filler Location, distribution and filling volume.
  • An embodiment of the present invention further provides a battery box, including the battery box bottom structure described in any of the above embodiments.
  • An embodiment of the present invention also provides an electric vehicle, including the battery box described in any of the above embodiments.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne une structure de plaque inférieure de bloc-batterie, un bloc-batterie et un véhicule électrique. La structure de plaque inférieure de bloc-batterie comprend une plaque d'étanchéité supérieure (1), une plaque d'étanchéité inférieure (2) et un cadre de support de charge (3) ; la plaque d'étanchéité supérieure (1) et/ou la plaque d'étanchéité inférieure (2) sont dotées de rainures de soudage (4) ; la plaque d'étanchéité supérieure (1) est soudée à la plaque d'étanchéité inférieure (2) au niveau des rainures de soudage (4) ; le cadre de support de charge (3) est soudé à la plaque d'étanchéité supérieure (1) et/ou à la plaque d'étanchéité inférieure (2) au niveau des rainures de soudage (4) ; plusieurs espaces fermés (5) sont formés entre la plaque d'étanchéité supérieure (1) et la plaque d'étanchéité inférieure (2).
PCT/CN2019/093470 2019-01-08 2019-06-28 Structure de plaque inférieure de bloc-batterie, bloc-batterie et véhicule électrique WO2020143194A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201920032994.3U CN209534724U (zh) 2019-01-08 2019-01-08 电池箱底板结构、电池箱及电动车
CN201920032994.3 2019-01-08

Publications (1)

Publication Number Publication Date
WO2020143194A1 true WO2020143194A1 (fr) 2020-07-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/093470 WO2020143194A1 (fr) 2019-01-08 2019-06-28 Structure de plaque inférieure de bloc-batterie, bloc-batterie et véhicule électrique

Country Status (2)

Country Link
CN (1) CN209534724U (fr)
WO (1) WO2020143194A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102163735A (zh) * 2010-02-15 2011-08-24 夏普株式会社 二次电池；太阳能发电系统、风力发电系统和车辆；以及二次电池的制造方法
CN102319953A (zh) * 2011-06-14 2012-01-18 兰州理工大学 镁合金-钢无匙孔搅拌摩擦点焊焊接方法
CN103934584A (zh) * 2014-03-13 2014-07-23 哈尔滨工业大学 一种适于铝钢异种材料搭接的钎焊辅助搅拌摩擦焊方法
JP2014210283A (ja) * 2013-04-19 2014-11-13 新日鐵住金株式会社 レーザ溶接方法及び溶接継手

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102163735A (zh) * 2010-02-15 2011-08-24 夏普株式会社 二次电池；太阳能发电系统、风力发电系统和车辆；以及二次电池的制造方法
CN102319953A (zh) * 2011-06-14 2012-01-18 兰州理工大学 镁合金-钢无匙孔搅拌摩擦点焊焊接方法
JP2014210283A (ja) * 2013-04-19 2014-11-13 新日鐵住金株式会社 レーザ溶接方法及び溶接継手
CN103934584A (zh) * 2014-03-13 2014-07-23 哈尔滨工业大学 一种适于铝钢异种材料搭接的钎焊辅助搅拌摩擦焊方法

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Publication number Publication date
CN209534724U (zh) 2019-10-25

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