EP3704434A1 - Dispositif de régulation thermique à plaques pour module de batteries - Google Patents
Dispositif de régulation thermique à plaques pour module de batteriesInfo
- Publication number
- EP3704434A1 EP3704434A1 EP18833280.3A EP18833280A EP3704434A1 EP 3704434 A1 EP3704434 A1 EP 3704434A1 EP 18833280 A EP18833280 A EP 18833280A EP 3704434 A1 EP3704434 A1 EP 3704434A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- pads
- plate
- height
- studs
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
Definitions
- the invention relates to the field of thermal regulation of battery modules, particularly for a motor vehicle whose propulsion is provided in whole or in part by an electric motor.
- the invention relates to the structure and design of a thermal regulation device for such battery modules.
- the battery In the field of electric and hybrid vehicles, the battery is generally formed of a plurality of electrical cells forming one or more modules arranged in a protective housing to form what is called a battery pack.
- the battery modules may be subject to temperature variations that may in some cases cause damage or even destruction.
- the thermal regulation of the modules is essential in order, on the one hand, to maintain them in good condition and, on the other hand, to ensure the reliability, autonomy, and performance of the vehicle.
- Devices for regulating the temperature of the modules are therefore implemented to optimize the operation of the modules.
- Such a thermal regulation device placed in thermal contact with at least one battery module, is traversed by a coolant and provides the functions of heating and / or cooling of the modules.
- the heat transfer fluid can thus absorb the heat emitted by each module to cool or as needed, it can bring him heat if the temperature of the module is insufficient for its proper operation.
- a problem is that during operation, the batteries are heated and may be damaged.
- the thermal regulation of the battery is, therefore, an important point.
- the temperature of the battery must remain between 20 ° C and 40 ° C to ensure reliability, battery life, and vehicle performance, while maximizing battery life.
- This regulation of the temperature of the battery, and in particular its cooling is provided by means of a coolant, such as water or brine, which circulates in the conduits of a circuit placed inside.
- a coolant such as water or brine
- thermoregulatory plate temperature control device in contact with the electrical modules, so as to regulate their temperature by thermal conduction.
- thermal regulation devices generally consist of two metal plates brazed one on the other. These plates are stamped so as to form a recessed impression.
- Each of the plates thus has a cavity limited by a lateral peripheral wall and a bottom, and an opening opposite to the bottom.
- the plate comprises a flat peripheral rim bordering the opening.
- the plates After brazing the plates one on the other, the plates define a conduit in which a heat transfer fluid can flow from a fluid inlet to a fluid outlet.
- IA and IB consists in manufacturing two plates 9a, 9b each having a plurality of pads 91 for disrupting the flow of fluid to optimize heat exchange.
- These pads 91 allow on the one hand, delimit the heat transfer fluid circulation circuit, and on the other hand, to ensure the mechanical strength of the thermal control device.
- the term "mechanical strength” is understood to mean, on the one hand, the resistance of the device to the deformation with respect to the forces exerted during the assembly of the plates together and, on the other hand, the resistance to deformation and to the bursting due to the pressure stresses of the coolant during operation of the device.
- the pads 91 of the plates 9a, 9b being located vis-à-vis and in contact after assembly of the plates together, it is noted that the height H2 of the pads is equal to the height H1 of the plates (as shown in Figure IB) .
- the top of the support pads is flush with the plane of the open surface of the plate.
- the plate height H1 is meant the distance measured between the internal face 92 of the bottom wall of the plate and the edge of the plate or the joint plane 93 of the two plates 9a, 9b after assembly.
- the height H2 of the stud is measured between the internal face 92 of the bottom wall of the plate and the top 911 of the stud 91, which is here in the same plane as the joint plane 93.
- the height H3 of the coolant circulation channel is here equal to twice the plate height H1, which is twice the height H2 of the pads.
- the pads are no longer perfectly vis-à-vis, so that the brazing of the pads between them is weakened and the mechanical strength of the device reduced.
- the height H2 of the pads can vary.
- the pads of the same plate can therefore have dimensional differences in terms of height H2 (dispersion).
- the arrangement of two studs facing each other causes a plurality of dimensional deviations, which increases the risks that two studs located opposite one another are not in contact when assembling the plates together. and that the flatness of the external faces of the plates is degraded.
- this type of thermal regulation device is arranged and bonded between two battery modules.
- the thermal exchange surfaces of the device must in this case present optimal flatness.
- the present invention aims to solve these problems of the state of the art and proposes a heat exchange device for the regulation of at least one electric battery module comprising first and second thermally conductive plates joined together so that forming an internal conduit for circulating a coolant from a fluid inlet to a fluid outlet, the inner face of each of the first and second plates having a plurality of studs projecting into said conduit and a flat surface extending between said pads.
- the top of the pads of one of said plates bears on the flat surface of the inner face of the other of said plates.
- the invention thus proposes a heat exchange device consisting of two contiguous plates, each plate having a plurality of studs extending within the conduit and coming to bear against the flat surface of the inner face of the opposite plate which is extends between the pads of this opposite plate.
- the pads of the first plate are offset from those of the second plate, and do not bear against them.
- the pads of the first plate are arranged vis-à-vis a flat portion of the bottom wall of the second plate, and vice versa. The joining, plates between them is thus facilitated and more effective.
- the invention makes it possible to eliminate, or at least reduce, the risks that the fastening of the plates is defective because of the misalignment of the pads with one another, or because of the dimensional differences (dispersion) observed on the height of the plates. studs during the manufacture of the plates.
- the mechanical strength of the device is, therefore, optimized.
- the number, shape and dimensions of the pads can be reduced compared to the prior art, which improves the flatness of the heat exchange walls of the plates.
- the pads are distributed on the internal faces of the first plate and the second plate so that they are arranged in a staggered manner within said conduit.
- each plate has a plurality of pads distributed differently over the width and length of each plate so that they are arranged in staggered rows when the plates are secured.
- An arrangement of the staggered blocks makes it possible on the one hand to optimize the mechanical strength of the device since support points are regularly distributed over the entire device, and on the other hand, to optimize the distribution of the heat transfer fluid. in the circulation channel so as to limit the pressure drop of the coolant during its circulation in the device and to improve the heat exchange with the modules.
- This particular configuration also makes it possible to reduce the number and the dimensions of the pads in order to improve the flatness of the walls of the plates.
- the first and second plates are secured by brazing.
- said plates each have a peripheral rim, said plates being brazed together at their respective rim as well as at the level of the contact zone between the top of the pads of a plate and the flat surface of the inner face of the other plate.
- the brazing of the plates between them takes place between two flat surfaces, either between the respective flanges of the plates, or between the top of the pads of a plate and the flat surface of the inner face of the other plate.
- the mechanical strength of the device is, therefore, optimized.
- the pads have a flat top, the flat top of each of the pads of the first plate coming into contact with the flat surface of the internal face of the second plate, and vice versa.
- brazing of the plates together is facilitated and more efficient since it is implemented between two flat surfaces, namely the flat top of the pads of one plate and the inner flat surface of the bottom wall of the other. plate.
- the height of said pads is equal to the height of said heat transfer fluid circulation duct extending between the respective inner faces of said plates.
- said conduit and said pads are formed by stamping the plates.
- said plates are identical.
- the die used by the stamping machine to make the first plate can also be used to make the second plate.
- the height of said pads is equal to twice the height of said plates.
- the invention further proposes a battery pack comprising at least one heat exchange device as described above for the regulation of at least one electric battery module.
- said battery pack comprises at least two electric battery modules secured by gluing to said device and arranged on either side of said device.
- Figure IA is a partial view of a thermal control device of the prior art
- FIG. 1B illustrates a sectional view along the transverse plane A-A of the device of FIG. 1A;
- Figure 2 is a perspective view of a thermal control device according to the invention.
- Figure 3 is an exploded view of the thermal control device of Figure 2;
- FIG 4 is a detail view of the thermal control device of Figure 2;
- Figure 5 is a partial sectional view along the transverse plane B-B of the thermal control device of Figure 4.
- FIG. 6 is an exploded and sectional view of a thermal control device according to the invention.
- the heat exchange device of the invention which consists of two contiguous plates, is intended to be placed in thermal contact with at least one battery module whose temperature must be regulated within a battery pack.
- a heat exchange device called thermal regulation device in the following description, is adapted to be disposed between at least two battery modules and to be secured by gluing them.
- such a device is called “double-sided" in that each of the plates is in thermal contact with at least one battery module.
- the device thermally regulates one or more battery modules arranged on one side of the device.
- the thermal control device comprises two plates which are assembled to one another and which each have an outer face intended to be in thermal contact with at least one battery module.
- Each of the plates comprises on its inner face or bottom wall (that is to say the face oriented towards the internal fluid circulation space or the face opposite to the outer face), a plurality of pads of shapes and identical dimensions.
- the latter delimit an internal circulation circuit of a heat transfer fluid in which protruding pads ensuring the mechanical strength of the device.
- the pads of the first plate are not arranged opposite the pads of the second plate, when the plates are secured.
- the pads of the first plate are offset from those of the second plate and come into contact with the inner face of the second plate, and vice versa.
- the pads of the first plate are arranged vis-à-vis and in contact with a flat portion of the inner face of the second plate, and vice versa.
- the invention makes it possible to eliminate, or at least reduce, the risks that the brazing is defective because of a misalignment of the plates and / or dimensional differences (dispersions) conventionally observed on the height of the pads during the manufacture of plates.
- the mechanical strength of the device is also optimized.
- the number and dimensions of the pads can be reduced, which allows on the one hand to improve the flatness of the plate exchange surfaces, and on the other hand to reduce the risks of presence of air bubbles between the exchange surfaces of the device and the battery module (s) when they are bonded to the device.
- FIGS 2 and 3 illustrate a thermal control device 1 according to one embodiment of the invention.
- the thermal control device 1 comprises two heat-conducting hollow plates, namely a first plate 11a and a second plate 11b.
- the first 11a and the second 11b plates are preferably manufactured by stamping and in a thermally conductive material.
- first 11a and 11b stamped plates are made of aluminum for reasons of weight, thermal performance and ease of assembly.
- the first 11a and 11b second plates each comprise side edges 110 interconnected by a bottom wall 112, the lateral edges extending inclined relative to the bottom wall 112.
- the lateral edges 110 are extended by a peripheral rim 114 extending parallel to the bottom wall 112.
- the bottom wall 112 has an external heat exchange face 111a facing outwardly of the thermal regulating device 1 and an inner surface, or heat transfer fluid circulation surface 111b facing towards the inside of the thermal regulation device 1. .
- each plate 11a, 11b is intended to come into thermal contact with at least one battery module (not shown).
- the battery module or modules are glued on the outer faces
- the plates 11a, 11b are joined to each other in a sealed manner by brazing to form an inner conduit 116 inside which circulates a heat transfer fluid, which is here a cooling fluid.
- the inner faces 111b of the first 11a and 11b second plates are arranged vis-à-vis one another and define an inner conduit 116 for circulating a heat transfer fluid in the device 1 of thermal regulation ( visible in Figure 5).
- Each of the first 11a and 11b second plates comprises a plurality of pads, or protuberances, 113 protruding from the inner face 111b.
- the pads 113 of the first plate 11a extend substantially perpendicularly from the inner face 111b of the first plate 11a to the opposite second plate 11b, and vice versa.
- the pads 113 have a flat top so as to facilitate and increase the effectiveness of the brazing of the plates 11a, 11b between them.
- the pads 113 are distributed over the length and the width of each plate, and are spaced from each other.
- the first plate 11a comprises, on one of its edges 110 (the lateral edge located on the left in FIGS. 2 and 3), two semicircular shapes 117 defining, with the corresponding semicircular shapes 117 of the second plate 11b, an opening for receiving and securing an inlet connector 12a and an outlet connector 12b of the heat transfer fluid to the thermal control device 1.
- FIG. 4 partially illustrates the thermal control device 1 of the invention after the first plate 11a has been joined to the second plate 11b (not visible in this figure) at their peripheral rim 114 and at the top of the studs 113.
- the pads 113 (drawn in solid lines) of the first plate 11a are offset with respect to the pads 113 (drawn in broken lines) of the second plate 11b, in that they are not arranged opposite each other. .
- FIG. 5 is a sectional view along the transverse plane BB of the thermal control device 1 of Figure 4, showing the configuration of the pads 113 in the device 1 thermal control after joining the first 11a and 11b second plates together.
- the first 11a and 11b second plates are assembled so that their respective flanges 114 are located vis-à-vis and in contact.
- the pads 113 of the first plate 11a are not located opposite the pads 113 of the second plate 11b.
- the flat top of the pads 113 of the first plate 11a is in contact with the inner face 111b of the second plate 11b, and in particular with the flat surface 115 of the inner face 111b of the second plate 11b which extends between the studs 113.
- the flat top of the pads 113 of the second plate 11b is in contact with the flat surface 115 of the inner face 111b of the first plate 11a.
- the pads 113 have a height H5 (measured between the flat surface 115 of the inner face 111b of the corresponding plate and the top of the pad 113) greater than the height H4 of the plate (measured between the flat surface 115 of the inner face 111b of the plate and its flange 114), as illustrated in FIG.
- the height H5 of the pads 113 is equal to the height H6 of the conduit 116 for circulating the coolant (measured between the internal faces 111b of the bottom wall 112 of the plates 11a, 11b).
- the plates 11a and 11b are substantially identical and therefore have the same height H4.
- the height H5 of the studs 113 which is equal to the height H6 of the conduit 116 for circulating the coolant, here corresponds to twice the height H4 of the plates 11a, 11b.
- the temperature control device 1 comprises a first plate 11a having a height H4 different from the second plate 11b
- the height H5 of the pads 113 would then be equal to the height H6 of the conduit 116 for circulating the coolant (but not would not be equal to twice the height H4 of plates 11a, 11b).
- the brazing of the first 11a and 11b second plates between them is performed at the edges 114 and at the point or contact plane (called contact area) between the top of the pads 113 and the flat surface 115 of the face Internal 111b plates 11a, 11b.
- the brazing of the first 11a and 11b second plates is thus simplified and optimized since the peaks of the pads 113 of each of the plates are soldered on a flat surface (in this case the flat surface 115) of the opposite plate.
- This configuration in which the pads 113 of the first plate 11a are offset relative to the pads 113 of the second plate 11b, eliminates the risk of defective soldering in case of misalignment of the plates 11a, 11b with respect to the 'other.
- the pads 113 of a plate being in contact with the flat surface of the internal face of the other plate, and not another pad as in the prior art, a possible misalignment of the plates 11a, 11b during brazing will not cause the plates 11a, 11b to fail to join together.
- the studs have smaller dimensions than the studs of the prior art since it is no longer necessary for the studs to have a surface at the top which is important to ensure the alignment of the pads together during the assembly of the plates.
- the depressions located on the external faces 111a, at the level of the pads 113 are of reduced dimensions and therefore require less glue to be filled during the bonding of the battery modules on the device 1 of thermal regulation.
- the amount of glue necessary to secure the battery modules on the thermal control device 1 is reduced, and the manufacturing cost is therefore also.
- the reduced dimensions of the pads make it possible to minimize the risk of the presence of air bubbles during bonding between the battery modules and the thermal regulation device 1.
- Thermal exchanges between the thermal control device 1 and the battery modules stuck on the latter are, therefore, optimized.
- Figure 6 is an exploded sectional view of a thermal control device 1 according to the invention showing the first 11a and second 11b plates arranged vis-à-vis before their joining.
- the plates 11a and 11b are strictly identical, the second plate 11b being turned (180 ° rotation) with respect to the first plate 11a so that the internal faces 111b of the bottom walls 112 are disposed facing each other.
- the semicircular shapes 117 for receiving the input connectors 12a and 12b of each of the plates 11a, 11b are located facing each other.
- the die used by the stamping press to make the first plate 11a can also be used to manufacture the second plate 11b.
- the plates 11a, 11b are joined together by brazing.
- the plates 11a, 11b may have a layer of faded material ("clad" in English) which facilitates the assembly and brazing of the plates together.
- Bonding by bonding is not limited to a particular type of adhesive (epoxy, silicone, polyurethane, mono / bi-components), nor to a particular curing process (called "curing" in English), such as at room temperature or at a predetermined temperature.
- the plates are preferably obtained by a stamping process, such a method being simple and inexpensive.
- the studs 113 are formed by deformation of the bottom wall 112.
- stamping monoblock plates allows the deformation of the bottom wall and the formation of pads as described above.
- the plates 11a, 11b constituting the thermal control device 1 have a thickness of less than 1.5 mm.
- the thickness of the plates is between 0.5 and 1 mm.
- the thickness of the plates as well as the number and the dimensions of the pads are adapted in order to optimize the thermal performance and the mechanical strength of the thermal control device 1.
- the internal faces of the plates may furthermore have additional walls configured to delimit a particular circuit for circulating the coolant.
- the thermal regulation device 1 can thus have a circulation circuit of the heat transfer fluid in U or I.
- the flanges 114 may have a specific shape (not shown) to improve the sealing of the thermal control device 1 after joining the plates together.
- the flange 114 of the first plate 11a may have a sealing lip (not shown) intended to cooperate with a correspondingly shaped sealing lip carried by the flange 114 of the second plate 11b.
- the pads 113 described above have a substantially conical shape whose vertex has been truncated so that it has a flat surface.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1762160A FR3075338A1 (fr) | 2017-12-14 | 2017-12-14 | Dispositif de regulation thermique a plaques pour module de batteries |
PCT/FR2018/053232 WO2019115942A1 (fr) | 2017-12-14 | 2018-12-12 | Dispositif de régulation thermique à plaques pour module de batteries |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3704434A1 true EP3704434A1 (fr) | 2020-09-09 |
Family
ID=61132718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18833280.3A Withdrawn EP3704434A1 (fr) | 2017-12-14 | 2018-12-12 | Dispositif de régulation thermique à plaques pour module de batteries |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3704434A1 (fr) |
CN (1) | CN214842717U (fr) |
FR (1) | FR3075338A1 (fr) |
WO (1) | WO2019115942A1 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5186250A (en) * | 1990-05-11 | 1993-02-16 | Showa Aluminum Kabushiki Kaisha | Tube for heat exchangers and a method for manufacturing the tube |
JPH11294990A (ja) * | 1998-04-06 | 1999-10-29 | Zexel:Kk | 並設一体型熱交換器 |
DE502005010654D1 (de) * | 2005-09-07 | 2011-01-20 | Modine Mfg Co | Wärmetauscher |
US10215504B2 (en) * | 2015-04-06 | 2019-02-26 | International Business Machines Corporation | Flexible cold plate with enhanced flexibility |
-
2017
- 2017-12-14 FR FR1762160A patent/FR3075338A1/fr not_active Ceased
-
2018
- 2018-12-12 CN CN201890001423.7U patent/CN214842717U/zh active Active
- 2018-12-12 WO PCT/FR2018/053232 patent/WO2019115942A1/fr unknown
- 2018-12-12 EP EP18833280.3A patent/EP3704434A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR3075338A1 (fr) | 2019-06-21 |
CN214842717U (zh) | 2021-11-23 |
WO2019115942A1 (fr) | 2019-06-20 |
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