WO2021008283A1 - 电池下箱体、电池系统及车辆 - Google Patents

电池下箱体、电池系统及车辆 Download PDF

Info

Publication number
WO2021008283A1
WO2021008283A1 PCT/CN2020/095758 CN2020095758W WO2021008283A1 WO 2021008283 A1 WO2021008283 A1 WO 2021008283A1 CN 2020095758 W CN2020095758 W CN 2020095758W WO 2021008283 A1 WO2021008283 A1 WO 2021008283A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
groove
fixed
battery lower
lower box
Prior art date
Application number
PCT/CN2020/095758
Other languages
English (en)
French (fr)
Inventor
陈玉超
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
Publication of WO2021008283A1 publication Critical patent/WO2021008283A1/zh

Links

Images

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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/11—Electric energy storages
    • B60Y2400/112—Batteries
    • 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
    • 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

  • the battery system of new energy vehicles in the accident caused serious problems such as damage to internal system components, high voltage leakage, short circuit spontaneous combustion, and even explosion caused by extrusion and deformation, which brought great challenges to accident rescue. Therefore, how to improve the safety of the battery system of new energy vehicles has become an urgent problem to be solved.
  • the purpose of this application is to provide a lower battery box, a battery system and a vehicle, which has better impact resistance.
  • the present application provides a battery lower box, which includes: a bottom plate; a plurality of fixed beams, which are sequentially connected and fixed to the bottom plate end to end; a cross beam, which is arranged between the fixed beams arranged oppositely; a support base, including a base plate and The limit part connected with the base plate and arranged oppositely, the base plate and the opposing limit part jointly form a groove, the base plate is connected with the fixed beam, and the end of the cross beam close to the fixed beam is embedded in the groove to connect the cross beam with the fixed beam.
  • the substrate includes a first bearing portion and a second bearing portion.
  • the first bearing portion and the oppositely disposed limiting portion jointly enclose a groove, and the second bearing portion is located on both outer sides of the groove.
  • a reinforcing part is provided between the second carrying part and the limiting part.
  • the reinforcing part is a polygonal plate, one side of the reinforcing part is connected to the limiting part, and the other side is connected to the second bearing part.
  • the reinforcing part, the second bearing part and the limiting part are enclosed into a hollow triangular prism structure.
  • the thickness of the first bearing portion is greater than the thickness of the second bearing portion, and the interior of the first bearing portion is hollow.
  • the support base further includes a connecting portion connected to the substrate and disposed opposite to each other, and the connecting portion and the limiting portion are alternately connected end to end to form a ring structure.
  • the substrate is a flat plate or a curved plate.
  • the width of the groove is W1
  • the width of the end of the beam close to the fixed beam is W2
  • the difference t between the width of the groove and the beam satisfies the following condition: 1mm ⁇ t ⁇ 3mm.
  • the distance h between the end of the beam close to the fixed beam and the bottom of the groove satisfies the following condition: 1mm ⁇ h ⁇ 5mm.
  • an embodiment of the present application also provides a battery system, including any battery lower box body as described above; a cover body, which covers a plurality of fixed beams of the battery lower box body and forms with the cross beam At least two accommodating cavities; multiple battery modules are accommodated in the accommodating cavity.
  • an embodiment of the present application also provides a vehicle including any battery system as described above.
  • the battery lower box provided by the present application is provided with a support base between a fixed beam and a cross beam, and the base plate of the support base is connected to the fixed beam, and the cross beam is embedded in a composite formed by a part of the base plate and the oppositely arranged limit part.
  • the impact force of the battery lower box body can be dispersed and weakened, the impact resistance of the battery lower box body is improved, and the structure is simple, which is convenient for manufacturing.
  • the battery system and the vehicle provided by the embodiments of the present application adopt the battery lower box as described above, which can reduce the degree of internal damage of the battery system, improve the safety and reliability of the battery system, and apply it For new energy vehicles, it is helpful to improve the anti-side collision performance of new energy vehicles, thereby avoiding or delaying the occurrence of spontaneous combustion and leakage accidents of the battery system, and providing valuable rescue time for people and property.
  • FIG. 1 is a schematic diagram of the effect of a battery lower box in the prior art after being impacted by a collision
  • FIG. 2 is a schematic diagram of the structure of a lower battery box provided by the present application.
  • FIG. 3 is a schematic structural diagram of a support seat of the lower battery box shown in FIG. 2;
  • FIG. 4 is a schematic structural diagram of another support seat of the lower battery box shown in FIG. 2;
  • Fig. 5 is a schematic structural diagram of another support seat of the lower battery box shown in Fig. 2;
  • Fig. 6 is a schematic structural view of another support seat of the lower battery box shown in Fig. 2;
  • Fig. 7 is a schematic structural diagram of another support seat of the lower battery box shown in Fig. 2;
  • FIG. 8 is a schematic structural view of another support seat of the lower battery box shown in FIG. 2;
  • FIG. 9 is a schematic diagram of the assembly effect of the support base and the fixed beam and the cross beam in FIG. 6;
  • Fig. 10 is a schematic structural diagram of a battery system provided by the present application. .
  • 13-support seat 131-base plate; 131a-first bearing part; 131b-second bearing part; 130-positioning hole; 132-limiting part; 133-groove; 134-reinforcement part; 135-connection part; 14 -Bottom plate; C-fixed frame;
  • the fixed beam 11 and the cross beam 12 are connected by a fixing frame C.
  • the fixing frame C can be an L-shaped or triangular bracket, and one side of the fixing frame C is connected to the cross beam 12. The other side is connected to the fixed beam 11, and one or more fixed frames C are respectively arranged on both sides of the cross beam 12. Since the fixing frames C on both sides of the cross beam 12 are independently connected to the fixing beam 11, when the battery lower box 1 is subjected to a lateral impact force F from the outside, the fixing frames C on both sides are easily turned outwards relative to the fixing beam 11. The impacted beam 12 directly contacts the fixed beam 11, and even penetrates the fixed beam 11, which cannot effectively absorb the collision energy, resulting in serious deformation and damage inside the battery system, and even a major safety accident.
  • the present application provides a lower battery box 1 which at least has good impact resistance.
  • the lower battery box and battery system provided by the embodiments of the present application will be described in detail below with reference to FIGS. 2 to 10.
  • the lower battery box 1 provided by the embodiment of the present application includes a plurality of fixed beams 11, a cross beam 12, a supporting seat 13 and a bottom plate 14.
  • a plurality of fixed beams 11 are sequentially connected and fixed to the bottom plate 14 end to end, and the cross beams 12 are arranged between the fixed beams 11 arranged oppositely.
  • the bottom plate 14 is a plate made of aluminum alloy or carbon steel.
  • the fixed beam 11 and the cross beam 12 can be aluminum alloy profiles, or can be made of carbon steel, aluminum alloy, magnesium alloy, aluminum-magnesium alloy and other materials.
  • the forming process is such as but not limited to die casting, extrusion, casting, etc.
  • the fixed beams 11 can be tailor-welded, riveted or screwed together as a whole, which can reduce the weight of the lower battery box 1 while meeting the structural strength.
  • the support base 13 includes a base plate 131 and a limiting portion 132 connected to and opposite to the base plate 131.
  • the base plate 131 and the opposed limiting portion 132 jointly enclose a groove 133.
  • the base plate 131 is connected to the fixed beam 11, and the cross beam 12 is close to the fixed beam
  • the end 121 of the 11 is embedded in the groove 133 to connect the cross beam 12 with the fixed beam 11.
  • the support base 13 may be made of metal materials such as carbon steel, aluminum alloy, magnesium alloy, aluminum-magnesium alloy, etc., and the forming process is for example, but not limited to, die-casting, extrusion, and casting.
  • the base plate 131 of the support base 13 and the fixed beam 11 may be connected by welding, riveting or bolting.
  • the end 21 of the cross beam 12 extends into the groove 133 and is welded to the limiting portion 132.
  • the base plate 131 and the oppositely disposed limiting portion 132 jointly enclose a groove 133 around the end 121 of the beam 12 to form an integral structure connecting the fixed beam 11 and the beam 12.
  • the support base 13 can absorb the side impact force as a whole without being split, and is transmitted back and forth between the fixed beams 11 that are arranged oppositely through the cross beam 12, and finally Be dispersed and weakened.
  • the base plate 131 is located between the cross beam 12 and the fixed beam 11, the cross beam 12 can be prevented from penetrating the fixed beam 11 during a collision, and the impact resistance of the battery lower box 1 is improved.
  • the battery lower box 1 provided by the embodiment of the present application is provided with a support base 13 between the fixed beam 11 and the cross beam 12, and the base plate 131 of the support base 13 is connected to the fixed beam 11, and the cross beam 12 is embedded by the base plate 131 and the oppositely disposed
  • the groove 133 enclosed by the limiting portion 132 can disperse and weaken the impact force of the battery lower box 1 and improve the impact resistance of the battery lower box 1, and the structure is simple and easy to manufacture.
  • the substrate 131 includes a first supporting portion 131a and a second supporting portion 131b.
  • the first supporting portion 131a and the oppositely disposed limiting portion 132 jointly enclose a groove 133, and the second supporting portion 131b is located in the groove 133 External sides.
  • the substrate 131 is a flat plate.
  • the base plate 131 and the fixed beam 11 are welded and connected.
  • a positioning hole 130 may also be provided on the second bearing portion 131b to facilitate riveting or screw connection of the second bearing portion 131b to the fixing beam 11 to improve The connection strength between the base plate 131 and the fixed beam 11 is improved.
  • the mounting area of the substrate 131 and the fixed beam 11 is larger than The cross-sectional area of the cross beam 12, and the support base 13 is not easy to turn to either side of the cross beam 12 when it is subjected to an external impact impact force, which can better absorb and disperse the impact impact force received by the battery lower box 1 and further improve the battery Impact resistance of the lower box 1.
  • Fig. 4 shows another support base 13, which is similar in structure to the support base 13 shown in Fig. 2, except that a reinforcing portion 134 is provided between the second bearing portion 131b and the limiting portion 132 to Improve the structural rigidity and strength of the support base 13.
  • the reinforcing portion 134 is a polygonal plate, and one side of the reinforcing portion 134 is connected to the limiting portion 132, and the other side is connected to the second supporting portion 131b.
  • the number of the reinforcement portion 134 may be one or more than two, and the two or more reinforcement portions 134 are spaced apart to prevent local deformation of the limiting portion 132.
  • the number of reinforcing parts 134 on both sides of the outer side of the groove 133 is the same to ensure that the support 13 is balanced on both sides of the beam 12, prevent the limit part 132 from turning over, and improve the structural rigidity and strength of the support 13 , Thereby improving the impact resistance of the lower battery case 1.
  • FIG. 5 shows another support base 13, which is similar in structure to the support base 13 shown in FIG. 4, except that the structure of the reinforcing portion 134 is different.
  • the reinforcing part 134 connects the end of the second supporting part 131b and the end of the limiting part 132, so that the reinforcing part 134, the second supporting part 131b and the limiting part 132 are enclosed into a hollow triangular prism structure.
  • the structural rigidity and strength of the support base 13 are further improved.
  • Figure 6 shows another support base 13, which is similar in structure to the support base 13 shown in Figure 5, except that the thickness of the first supporting portion 131a is greater than the thickness of the second supporting portion 131b, and the first The inside of the supporting portion 131a is hollow.
  • the beam 12 When the support base 13 is subjected to an impact from the outside, the beam 12 will repeatedly hit the first bearing portion 131a, and the first bearing portion 131a is thickened and hollowed out, which can further increase the substrate 131 received from the end 121 of the beam 12 The repeated collision force improves the structural rigidity and strength of the support base 13.
  • Fig. 7 shows another support base 13, which is similar in structure to the support base 13 shown in Fig. 2, except that the support base 13 further includes a connecting portion 135 connected to the base plate 13 and disposed opposite to each other.
  • the portion 135 and the limiting portion 132 are alternately connected end to end to form a ring structure.
  • the connecting portions 135 arranged oppositely can restrict the cross beam 12 from moving up and down along the groove 133, and further improve the connection strength between the cross beam 12 and the limiting portion 132.
  • the annular structure is a box-shaped structure with an opening, and the connection between the connecting portion 135 and the limiting portion 132 is smoothly transitioned to prevent the operator from being scratched.
  • a reinforcement portion 134 is provided between the second bearing portion 131b and the limiting portion 132.
  • the reinforcement portion 134 may be, for example, a polygonal plate as shown in FIG. 4 to further improve the structural strength and rigidity of the support base 13, thereby increasing The impact resistance of the lower case 1 of the battery.
  • FIG. 8 shows another support base 13, which is similar in structure to the support base 13 shown in FIG. 7, except that the base plate 131 is a curved plate.
  • the curved plate can be a wave-shaped plate or an arc-shaped plate to buffer the collision force transmitted back and forth between the cross beam 12 and the fixed beam 11 opposite to each other, shorten the time for the collision force to be dispersed and weakened, and improve the lower battery box. 1. Impact resistance.
  • the support base 13 may also be any combination of the above-mentioned features.
  • the substrate 131 in FIGS. 3 to 7 may also be a curved panel, which will not be repeated.
  • the width of the groove 133 is W1
  • the width of the end 121 of the beam 12 is W2
  • the difference t between the width of the groove 133 and the beam 12 satisfies the following Conditions: 1mm ⁇ t ⁇ 3mm. If t exceeds the above range, the fit between the cross beam 12 and the groove 133 will be too tight and will not be conducive to installation, or too loose will not be conducive to the strength of the welding connection between the cross beam 12 and the limiting portion 132.
  • the distance h between the end 121 of the beam 12 and the bottom of the groove 133 satisfies the following condition: 1mm ⁇ h ⁇ 5mm. If h exceeds the above range, the gap between the beam 12 and the bottom of the groove 133 is too small, which is not conducive to installation, or the gap is too large, which affects the strength of the connection between the beam 12 and the support base 13.
  • 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 a plurality of fixed beams 11 of the battery lower box 1 and forms at least two accommodating cavities with the cross beam 12, and a plurality of battery modules 3 are accommodated in the accommodating cavity.
  • the battery system provided by the embodiments of the present application adopts the lower battery box 1 as described above, which can reduce the degree of internal damage of the battery system, improve the safety and reliability of the battery system, and apply it to new energy vehicles. , Which is beneficial to improve the anti-side collision performance of new energy vehicles, thereby avoiding or delaying the occurrence of spontaneous combustion and leakage accidents of the battery system, and providing valuable rescue time for people and property.
  • an embodiment of the present application also provides a vehicle, including any battery system described above.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电池下箱体（1）、电池系统及车辆，该电池下箱体（1）包括：底板（14）；多个固定梁（11），首尾依次连接并固定于底板（14）；横梁（12），设置于相对布置的固定梁（11）之间；支撑座（13），包括基板（131）和与基板（131）连接且相对设置的限位部（132），基板（131）与相对设置的限位部（132）共同围合成凹槽（133），基板（131）与固定梁（11）连接，横梁（12）靠近固定梁（11）的端部（121）嵌入凹槽（133），以将横梁（12）与固定梁（11）连接。该电池下箱体（1）通过在固定梁（11）与横梁（12）之间设置支撑座（13），且支撑座（13）的基板（131）与固定梁（11）连接，横梁（12）嵌入由基板（131）与相对设置的限位部（132）共同围合成凹槽（133）内，可以分散并减弱电池下箱体（1）受到的碰撞冲击力，提高了电池下箱体（1）的抗冲击性，进而降低电池系统内部的受损程度，提高了电池系统的安全性和可靠性。

Description

电池下箱体、电池系统及车辆
相关申请的交叉引用
本申请要求享有于2019年07月15日提交的名称为“电池下箱体及电池系统”的中国专利申请201921098475.3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
在新能源电动车逐渐被市场认可和普及的情况下，新能源车辆的交通事故也逐年增多，并且往往会造成更大的人身伤害和财产损失，成为制约新能源发展的重要因素之一。
新能源车辆的电池系统在事故中因挤压变形而造成的内部系统组件受损、高压漏电、短路自燃、甚至爆炸等严重问题，给事故救援带来了很大的挑战。因此如何提高新能源车辆的电池系统的安全性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、电池系统及车辆，该电池下箱体具有较好的抗冲击性。
一方面，本申请提供了一种电池下箱体，其包括：底板；多个固定梁，首尾依次连接并固定于底板；横梁，设置于相对布置的固定梁之间；支撑座，包括基板和与基板连接且相对设置的限位部，基板与相对设置的限位部共同形成凹槽，基板与固定梁连接，横梁靠近固定梁的端部嵌入凹槽，以将横梁与固定梁连接。
根据本申请的一个方面，基板包括第一承载部和第二承载部，第一承载部与相对设置的限位部共同围合成凹槽，第二承载部位于凹槽的外部两侧。
根据本申请的一个方面，第二承载部与限位部之间设置有加强部。
根据本申请的一个方面，加强部为多边形板件，加强部的一条边连接限位部，另一条边连接第二承载部。
根据本申请的一个方面，加强部、第二承载部和限位部围合成内部中空的三棱柱结构。
根据本申请的一个方面，第一承载部的厚度大于第二承载部的厚度，且第一承载部的内部中空设置。
根据本申请的一个方面，支撑座还包括与基板连接且相对设置的连接部，连接部与限位部首尾交替连接形成环形结构。
根据本申请的一个方面，基板为平面板或者曲面板。
根据本申请的一个方面，凹槽的宽度为W1，横梁靠近固定梁的端部宽度为W2，则凹槽与横梁的宽度之差t满足如下条件：1mm≤t≤3mm。
根据本申请的一个方面，横梁靠近固定梁的端部与凹槽底部之间的距离h满足如下条件：1mm≤h≤5mm。
另一方面，本申请实施例还提供了一种电池系统，包括如前所述的任一种电池下箱体；盖体，盖合于电池下箱体的多个固定梁，且与横梁形成至少两个容纳腔；多个电池模组，容纳于容纳腔。
另一方面，本申请实施例还提供了一种车辆，包括如前所述的任一种电池系统。
本申请提供的一种电池下箱体，通过在固定梁与横梁之间设置支撑座，且支撑座的基板与固定梁连接，横梁嵌入由基板的一部分与相对设置的限位部共同围合成的凹槽内，可以分散并减弱电池下箱体受到的碰撞冲击力，提高了电池下箱体的抗冲击性，并且结构简单，便于生产制造。另外，本申请实施例提供的一种电池系统及车辆，采用如前所述的电池下箱体，可以降低电池系统内部受损害的程度，提高了电池系统的安全性和可靠性，将其应用于新能源车辆上，有利于改善新能源车辆的抗侧碰性能，从而避免或延缓电池系统自燃和漏电事故的发生，为人身和财产提供了宝贵的救援时间。
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，相同或相似的附图标记表示相同或相似的特征。
图1是现有技术中的电池下箱体受到碰撞冲击后的效果示意图；
图2是本申请提供的一种电池下箱体的结构示意图；
图3是图2所示的电池下箱体的一种支撑座的结构示意图；
图4是图2所示的电池下箱体的另一种支撑座的结构示意图；
图5是图2所示的电池下箱体的另一种支撑座的结构示意图；
图6是图2所示的电池下箱体的另一种支撑座的结构示意图；
图7是图2所示的电池下箱体的另一种支撑座的结构示意图；
图8是图2所示的电池下箱体的另一种支撑座的结构示意图；
图9是图6中的支撑座与固定梁和横梁的组装效果示意图；
图10是本申请提供的一种电池系统的结构示意图。。
附图标记说明：
1-电池下箱体；11-固定梁；12-横梁；121-第一通孔；
13-支撑座；131-基板；131a-第一承载部；131b-第二承载部；130-定位孔；132-限位部；133-凹槽；134-加强部；135-连接部；14-底板；C-固定架；
2-盖体；3-电池模组。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。下面的详细描述中公开了许多具体细节，以便全面理解本申请。但是，对于本领域技术人员来说，很明显的是，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。本申请决不限于下面所提出的任何具体配置，而是在不脱离本申请的精神的前提下覆盖了元素和部件的任何修改、 替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本申请造成不必要的模糊。
如图1所示，现有技术的电池下箱体中，固定梁11与横梁12通过固定架C连接，固定架C可以为L型或者三角形支架，固定架C的一条边与横梁12连接，另一条边与固定梁11连接，一个或者多个固定架C分别设置于横梁12的两侧。由于横梁12两侧的固定架C各自独立地连接至固定梁11，当电池下箱体1受到外界的侧向碰撞力F时，两侧的固定架C容易相对固定梁11分别向外翻转，使受到撞击的横梁12直接与固定梁11接触，甚至贯穿固定梁11，无法有效地吸收碰撞能量，导致电池系统内部严重变形受损，甚至造成重大安全事故。
为此，本申请提供了一种电池下箱体1，其至少具有较好的抗冲击性。下面结合图2至图10对本申请实施例提供的电池下箱体及电池系统进行详细描述。
请一并参阅图2和图3，本申请实施例提供的一种电池下箱体1包括：多个固定梁11、横梁12、支撑座13和底板14。
多个固定梁11首尾依次连接并固定于底板14，横梁12设置于相对设置的固定梁11之间。
底板14为由铝合金或者碳钢制作的板件。可选地，固定梁11和横梁12可以为铝合金型材，也可以采用碳钢、铝合金、镁合金、铝镁合金等材料制作，成型工艺例如但不限于压铸、挤出、铸造等，多个固定梁11可以拼焊连接、铆接或者螺钉紧固连接为一体，在满足结构强度的同时降低电池下箱体1的重量。
支撑座13包括基板131和与基板131连接且相对设置的限位部132，基板131与相对设置的限位部132共同围合成凹槽133，基板131与固定梁11连接，横梁12靠近固定梁11的端部121嵌入凹槽133，以将横梁12与固定梁11连接。
支撑座13可以采用碳钢、铝合金、镁合金、铝镁合金等金属材料制作，成型工艺例如但不限于压铸、挤出、铸造等。支撑座13的基板131与固定梁11之间可以采用焊接、铆接或者螺栓连接，横梁12的端部21伸入凹槽 133内并与限位部132焊接连接。
本申请实施例中，基板131的至少一部分与相对设置的限位部132共同围合成凹槽133围绕在横梁12的端部121，形成连接固定梁11和横梁12的整体结构。当电池下箱体1受到外界的侧向碰撞力时，支撑座13可以整体上吸收该侧向碰撞力而不会被分裂，并通过横梁12在相对设置的固定梁11之间来回传递，最终被分散减弱。同时由于基板131位于横梁12与固定梁11之间，可以防止横梁12在碰撞过程中贯穿固定梁11，提高了电池下箱体1的抗冲击性。
本申请实施例提供的电池下箱体1，通过在固定梁11与横梁12之间设置支撑座13，且支撑座13的基板131与固定梁11连接，横梁12嵌入由基板131与相对设置的限位部132共同围合成的凹槽133内，可以分散并减弱电池下箱体1受到的碰撞冲击力，提高了电池下箱体1的抗冲击性，并且结构简单，便于生产制造。
下面结合附图进一步详细说明支撑座13的具体结构。
再次参阅图3，基板131包括第一承载部131a和第二承载部131b，第一承载部131a与相对设置的限位部132共同围合成凹槽133，第二承载部131b位于凹槽133的外部两侧。
可选地，基板131为平面板。基板131与固定梁11焊接连接，为了保证二者连接的可靠性，第二承载部131b上还可以设置有定位孔130，以便于将第二承载部131b铆接或者螺钉连接至固定梁11，提高了基板131与固定梁11的连接强度。
由于基板131的第一承载部131a与相对设置的限位部132共同围合成凹槽133，且第二承载部131b位于凹槽133的外部两侧，故基板131与固定梁11的安装面积大于横梁12的横截面面积，且支撑座13受到外界的碰撞冲击力时不易向横梁12的任一侧翻转，可以更好地吸收并分散电池下箱体1受到的碰撞冲击力，进一步提高了电池下箱体1的抗冲击性。
图4示出了另一种支撑座13，其与图2所示的支撑座13的结构类似，不同之处在于，第二承载部131b与限位部132之间设置有加强部134，以提高支撑座13的结构刚度和强度。
加强部134为多边形板件，加强部134的一条边连接限位部132，另一条边连接第二承载部131b。加强部134的数量可以为一个或者两个以上，两个以上的加强部134间隔分布，防止限位部132局部变形。可选地，凹槽133的外部两侧的加强部134数量相同，保证支撑座13在横梁12两侧的受力均衡，防止限位部132侧翻，提高了支撑座13的结构刚度和强度，进而提高电池下箱体1的抗冲击性。
图5示出了另一种支撑座13，其与图4所示的支撑座13的结构类似，不同之处在于，加强部134的结构不同。
如图5所示，加强部134连接第二承载部131b的端部和限位部132的端部，使得加强部134、第二承载部131b和限位部132围合成内部中空的三棱柱结构，相对于图4中的加强部134，进一步提高了支撑座13的结构刚度和强度。
图6示出了另一种支撑座13，其与图5所示的支撑座13的结构类似，不同之处在于，第一承载部131a的厚度大于第二承载部131b的厚度，且第一承载部131a的内部中空设置。
由于支撑座13受到外界的碰撞冲击力时，横梁12会反复撞击第一承载部131a，将第一承载部131a加厚并中空设置，可以进一步提高基板131受到的来自横梁12的端部121的反复碰撞力，提高支撑座13的结构刚度和强度。
图7示出了另一种支撑座13，其与图2所示的支撑座13的结构类似，不同之处在于，支撑座13还包括与基板13连接且相对设置的连接部135，且连接部135与限位部132首尾交替连接形成环形结构。
由此，相对设置的连接部135可以限制横梁12沿凹槽133上下窜动，进一步提高了横梁12与限位部132的连接强度。
可选地，环形结构为具有开口的箱型结构，且连接部135与限位部132的连接处圆滑过渡，防止划伤操作人员。
可选地，第二承载部131b与限位部132之间设置有加强部134，加强部134例如可以为图4中的多边形板件，以进一步提高支撑座13的结构强度和刚度，进而提高电池下箱体1的的抗冲击性。
图8示出了另一种支撑座13，其与图7所示的支撑座13的结构类似，不同之处在于，基板131为曲面板。曲面板可以为波浪形板件或者弧形板件，以缓冲在横梁12与相对设置的固定梁11之间来回传递的碰撞力，缩短该碰撞力被分散减弱的时间，进而提高电池下箱体1的抗冲击性。
可以理解的是，支撑座13还可以为上述各特征的任意组合，例如，图3至图7中的基板131也可以为曲面板，不再赘述。
参阅图9，由于固定梁11和横梁12不可避免地存在制造误差，导致横梁12与固定梁12之间存在安装间隙，而支撑座13可以弥补该安装间隙，提高了电池下箱体1的制造工艺可行性。
具体来说，如前所述的任一种支撑座13中，凹槽133的宽度为W1，横梁12的端部121的宽度为W2，则凹槽133与横梁12的宽度之差t满足如下条件：1mm≤t≤3mm。如果t超过上述范围，则横梁12与凹槽133的配合会过紧不利于安装，或者过松不利于横梁12与限位部132的焊接连接强度。
进一步地，横梁12的端部121与凹槽133底部之间的距离h满足如下条件：1mm≤h≤5mm。如果h超过上述范围，则横梁12与凹槽133底部的间隙过小不利于安装，或者间隙过大影响横梁12与支撑座13的连接强度。
参阅图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的多个固定梁11，且与横梁12形成至少两个容纳腔，多个电池模组3容纳于该容纳腔。横梁12的数量越多，容纳腔的数量也越多，从而可以容纳更多的电池模组3。
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1，可以降低电池系统内部受损害的程度，提高了电池系统的安全性和可靠性，将其应用于新能源车辆上，有利于改善新能源车辆的抗侧碰性能，从而避免或延缓电池系统自燃和漏电事故的发生，为人身和财产提供了宝贵的救援时间。
另外，本申请实施例还提供了一种车辆，包括如前所述的任一种电池 系统。
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；物品没有使用数量词修饰时旨在包括一个/种或多个/种物品，并可以与“一个/种或多个/种物品”互换使用”；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 (12)

  1. 一种电池下箱体，包括：
    底板；
    多个固定梁，首尾依次连接并固定于所述底板；
    横梁，设置于相对布置的所述固定梁之间；
    支撑座，包括基板和与所述基板连接且相对设置的限位部，所述基板与相对设置的所述限位部共同围合成凹槽，所述基板与所述固定梁连接，所述横梁靠近所述固定梁的端部嵌入所述凹槽，以将所述横梁与所述固定梁连接。
  2. 根据权利要求1所述的电池下箱体，其中，所述基板包括第一承载部和第二承载部，所述第一承载部与相对设置的所述限位部共同围合成所述凹槽，所述第二承载部位于所述凹槽的外部两侧。
  3. 根据权利要求2所述的电池下箱体，其中，所述第二承载部与所述限位部之间设置有加强部。
  4. 根据权利要求3所述的电池下箱体，其中，所述加强部为多边形板件，所述加强部的一条边连接所述限位部，另一条边连接所述第二承载部。
  5. 根据权利要求3所述的电池下箱体，其中，所述加强部、所述第二承载部和所述限位部围合成内部中空的三棱柱结构。
  6. 根据权利要求2-5任一项所述的电池下箱体，其中，所述第一承载部的厚度大于所述第二承载部的厚度，且所述第一承载部的内部中空设置。
  7. 根据权利要求2或3所述的电池下箱体，其中，所述支撑座还包括与所述基板连接且相对设置的连接部，且所述连接部与所述限位部首尾交替连接形成环形结构。
  8. 根据权利要求1所述的电池下箱体，其中，所述基板为平面板或者曲面板。
  9. 根据权利要求1所述的电池下箱体，其中，所述凹槽的宽度为W1，所述横梁的所述端部的宽度为W2，则所述凹槽与所述端部的宽度之差t满足如下条件：1mm≤t≤3mm。
  10. 根据权利要求1所述的电池下箱体，其中，所述横梁的所述端部与所述凹槽底部之间的距离满足如下条件：1mm≤h≤5mm。
  11. 一种电池系统，包括：
    如权利要求1至10任一项所述的电池下箱体；
    盖体，盖合于所述电池下箱体的多个所述固定梁，且与所述横梁形成至少两个容纳腔；
    多个电池模组，容纳于所述容纳腔。
  12. 一种车辆，包括如权利要求11所述的电池系统。
PCT/CN2020/095758 2019-07-15 2020-06-12 电池下箱体、电池系统及车辆 WO2021008283A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201921098475.3U CN210110876U (zh) 2019-07-15 2019-07-15 电池下箱体及电池系统
CN201921098475.3 2019-07-15

Publications (1)

Publication Number Publication Date
WO2021008283A1 true WO2021008283A1 (zh) 2021-01-21

Family

ID=67847654

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/095758 WO2021008283A1 (zh) 2019-07-15 2020-06-12 电池下箱体、电池系统及车辆

Country Status (4)

Country Link
US (1) US11177527B2 (zh)
EP (1) EP3767700B1 (zh)
CN (1) CN210110876U (zh)
WO (1) WO2021008283A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN210110876U (zh) * 2019-07-15 2020-02-21 江苏时代新能源科技有限公司 电池下箱体及电池系统
KR102484991B1 (ko) * 2020-10-19 2023-01-04 주식회사 포스코 배터리 케이스
CN114982046A (zh) * 2020-12-25 2022-08-30 宁德时代新能源科技股份有限公司 电池的箱体、电池、用电装置、制备箱体的方法和装置
KR20220106370A (ko) * 2021-01-22 2022-07-29 주식회사 엘지에너지솔루션 화재 전이 방지 구조가 구비된 전지 모듈 및 이를 포함하는 전지 팩
WO2022230346A1 (ja) * 2021-04-29 2022-11-03 アイシン軽金属株式会社 車載電池ケース用強度部材及びその取付構造
WO2022230345A1 (ja) * 2021-04-29 2022-11-03 アイシン軽金属株式会社 車載電池ケース用強度部材
EP4333178A1 (en) * 2021-04-29 2024-03-06 Aisin Keikinzoku Co., Ltd. Onboard battery case structure
CN114497854A (zh) * 2021-12-21 2022-05-13 极氪汽车(宁波杭州湾新区)有限公司 一种电池包箱体结构
CN114388967A (zh) * 2021-12-21 2022-04-22 威睿电动汽车技术(宁波)有限公司 一种液冷式电池托盘及电池箱
CN114454772B (zh) * 2022-04-13 2022-06-28 中国重汽集团济南动力有限公司 一种电池锁紧装置及下换电重型电动商用车
FR3140481A1 (fr) * 2022-10-03 2024-04-05 Psa Automobiles Sa Dispositif de reception de modules de batteries destinees a alimenter un organe electrique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1783541A (zh) * 2004-10-28 2006-06-07 三星Sdi株式会社 电池模块
CN205050889U (zh) * 2015-09-28 2016-02-24 浙江天能能源科技有限公司 一种双层钣金电池箱
CN108063197A (zh) * 2016-11-07 2018-05-22 本特勒尔汽车技术有限公司 具有公差补偿元件的电池支架
CN207474545U (zh) * 2017-12-01 2018-06-08 郑州比克电池有限公司 一种改善受力的电池包钣金箱体
CN209658262U (zh) * 2019-03-19 2019-11-19 宁波吉利汽车研究开发有限公司 一种电池包
CN110571378A (zh) * 2019-08-29 2019-12-13 广汽新能源汽车有限公司 电池壳与电池系统
CN210110876U (zh) * 2019-07-15 2020-02-21 江苏时代新能源科技有限公司 电池下箱体及电池系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US953600A (en) 1909-03-05 1910-03-29 Noah S Edens Tide-motor.
US5881517A (en) * 1997-08-26 1999-03-16 Universal Consolidated Methods, Inc. Rest room partition mounting brackets
US20140196394A1 (en) * 2013-01-11 2014-07-17 Chatsworth Products, Inc. Modular thermal isolation barrier for data processing equipment structure
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
GB2541203B (en) * 2015-08-11 2019-02-06 Jaguar Land Rover Ltd Apparatus for supporting a battery with integrated cooling channels
US9533600B1 (en) 2015-09-03 2017-01-03 GM Global Technology Operations LLC Structurally integrated propulsion battery
DE102016110787A1 (de) * 2016-06-13 2017-12-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Batteriegehäuse einer Traktionsbatterie eines Kraftfahrzeugs
WO2018033880A2 (en) 2016-08-17 2018-02-22 Shape Corp. Battery support and protection structure for a vehicle
CN108461685A (zh) 2018-04-13 2018-08-28 爱驰汽车有限公司 电池包及其电池箱体
CN109768200B (zh) 2019-03-29 2022-01-25 蜂巢能源科技有限公司 电池包外壳

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1783541A (zh) * 2004-10-28 2006-06-07 三星Sdi株式会社 电池模块
CN205050889U (zh) * 2015-09-28 2016-02-24 浙江天能能源科技有限公司 一种双层钣金电池箱
CN108063197A (zh) * 2016-11-07 2018-05-22 本特勒尔汽车技术有限公司 具有公差补偿元件的电池支架
CN207474545U (zh) * 2017-12-01 2018-06-08 郑州比克电池有限公司 一种改善受力的电池包钣金箱体
CN209658262U (zh) * 2019-03-19 2019-11-19 宁波吉利汽车研究开发有限公司 一种电池包
CN210110876U (zh) * 2019-07-15 2020-02-21 江苏时代新能源科技有限公司 电池下箱体及电池系统
CN110571378A (zh) * 2019-08-29 2019-12-13 广汽新能源汽车有限公司 电池壳与电池系统

Also Published As

Publication number Publication date
EP3767700A1 (en) 2021-01-20
US20210020877A1 (en) 2021-01-21
CN210110876U (zh) 2020-02-21
US11177527B2 (en) 2021-11-16
EP3767700B1 (en) 2021-07-21

Similar Documents

Publication Publication Date Title
WO2021008283A1 (zh) 电池下箱体、电池系统及车辆
US8042862B2 (en) Reinforcing brace
US7987939B2 (en) Hood system with multiple open positions
US10822035B2 (en) Vehicle framework structure
EP3787059B1 (en) Battery lower casing and battery system
CN207549934U (zh) 针对新能源汽车电池立体安全防护装置
CN110171376B (zh) 前机舱碰撞吸能结构
KR20200102767A (ko) 차량용 후방구조
CN114571976A (zh) 一种集成电动汽车下车体与电池包的一体化结构
WO2023093330A1 (zh) 电池包框架、电池包和车辆
JP2005067225A (ja) 車両の床構造
CN217598323U (zh) 一种车身一体化动力电池连接结构
CN207353332U (zh) 一种电池箱体
JP2009126359A (ja) 衝突安全性に優れた自動車サイドドア
CN113443010B (zh) 汽车机舱后横梁总成
KR20230067363A (ko) 차량 플로어구조
CN112623041A (zh) 用于车身的b柱结构及车辆
JP2001018834A (ja) 中空車体枠部材用補強部材
CN219959286U (zh) 一种电池包壳体、电池包及车辆
CN218569054U (zh) 一种电池包下箱体、电池包及电动装置
CN205706912U (zh) 车辆的顶横梁与立柱的连接结构及车辆
CN213340584U (zh) 一种复合式电池箱
CN220021389U (zh) 电池包及车辆
CN220842183U (zh) 电池包安装构造
CN217649535U (zh) 物流车前舱盖组装结构

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20839849

Country of ref document: EP

Kind code of ref document: A1