CN115056668A - Cooling system of electric automobile battery charging outfit power unit - Google Patents
Cooling system of electric automobile battery charging outfit power unit Download PDFInfo
- Publication number
- CN115056668A CN115056668A CN202210732979.6A CN202210732979A CN115056668A CN 115056668 A CN115056668 A CN 115056668A CN 202210732979 A CN202210732979 A CN 202210732979A CN 115056668 A CN115056668 A CN 115056668A
- Authority
- CN
- China
- Prior art keywords
- cooling
- liquid
- power unit
- tank
- cooling system
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 73
- 239000000110 cooling liquid Substances 0.000 claims abstract description 36
- 239000000498 cooling water Substances 0.000 claims description 14
- 239000002826 coolant Substances 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000002528 anti-freeze Effects 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007654 immersion Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004334 fluoridation Methods 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a cooling system of a power unit of electric automobile charging equipment, which comprises a power unit, a closed liquid tank and a liquid cooling circulating system, wherein the power unit is immersed in phase-change cooling liquid at the lower part of the liquid tank; the heat exchanger is arranged outside the liquid tank and is connected with the condenser through a cooling pipeline. The invention adopts a two-phase immersion type liquid cooling mode, the working temperature of the cooling liquid is stable, and the cooling effect is good.
Description
Technical Field
The invention relates to electric automobile charging equipment, in particular to a cooling system of a power unit of the electric automobile charging equipment.
Background
Electric automobile fills electric pile at the during operation, and power unit can produce a large amount of heats, and along with the development of quick charge technique, fills electric pile's charge capacity and also more and more big. Thus, the heat generated in the charging post will be up to several kilowatts or even more than ten kilowatts. And thermal constantly gathering, whole inside temperature that fills electric pile can rise fast, will seriously influence the high-efficient steady operation that fills electric pile power unit, aggravate electronic component's ageing, reduce electric automobile's charge efficiency, the hidden danger that probably has the conflagration even appears.
The utility model discloses a patent number CN 202022701220.0's utility model relates to a liquid cooling stake of charging, including filling electric pile body and power module, power module with fill electric pile body detachable connection, power module includes the casing, and install heating element and the PCB board in the casing, PCB board one side is equipped with the link and stretches out the casing, the one end of casing is equipped with inlet and liquid outlet, be used for connecting outside liquid cooling circulation system, be full of non-conducting liquid in the casing, submergence PCB board and heating element fill this internal installation end that is equipped with of electric pile, be used for linking to each other with the link. The utility model discloses an adopt single-phase liquid cooling mode to dispel the heat to power unit, the temperature instability of coolant liquid, the temperature dependence external heat dissipation condition of coolant liquid.
Disclosure of Invention
The invention aims to provide a cooling system of a power unit of electric automobile charging equipment, which has a good cooling effect.
In order to solve the technical problems, the invention adopts the technical scheme that the cooling system of the power unit of the charging equipment of the electric automobile comprises a power unit, a closed liquid tank and a liquid cooling circulating system, wherein the power unit is immersed in phase-change cooling liquid at the lower part of the liquid tank; the heat exchanger is arranged outside the liquid tank and is connected with the condenser through a cooling pipeline.
The cooling system comprises a heat exchanger, a fan, a cooling water tank, a liquid cooling circulating system and a cooling pipeline, wherein the heat exchanger comprises the fan and the cooling water tank, the liquid cooling circulating system comprises a hydraulic pump and a control valve, the hydraulic pump, the control valve, a condenser and the cooling water tank are connected in series in the cooling pipeline, and cooling liquid in the liquid cooling circulating system is water or ethylene glycol antifreeze liquid.
In the cooling system, the phase-change cooling liquid is a fluoridation temperature-control cooling liquid.
The cooling system comprises the pressure release valve, the pressure release valve is arranged on the upper portion of the liquid tank shell, the inner side of the pressure release valve is communicated with the gas phase space on the upper portion of the liquid tank, and the outer side of the pressure release valve is communicated with the atmosphere.
The cooling system comprises an input connector and an output connector, wherein the input connector and the output connector are arranged on the liquid tank shell; the input end of the power unit is connected with an external alternating current power supply through the input connector, and the output end of the power unit is connected with an external charging connector through the output end connector.
In the cooling system, the cooling water tank includes an S-shaped rack pipe and a plurality of cooling fins fixed on the rack pipe.
The cooling system comprises a plurality of power units and a plurality of power units connected in parallel
The cooling system of the power unit of the electric vehicle charging equipment adopts a two-phase immersion type liquid cooling mode, the working temperature of the cooling liquid is stable, and the cooling effect is good.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a power unit cooling system of an electric vehicle charging device according to an embodiment of the invention.
Detailed Description
The structure of the power unit cooling system of the electric vehicle charging equipment in the embodiment of the invention is shown in fig. 1, and the power unit cooling system comprises a plurality of AC/DC power units 7, a closed liquid tank 1 and a liquid cooling circulating system, wherein the AC/DC power units 7 are immersed in phase-change cooling liquid 2 insulated at the lower part of the liquid tank 1, the liquid cooling circulating system comprises a condenser 3 and a heat exchanger 4, and the condenser 3 is arranged in a gas phase space M at the upper part of the liquid tank 1. The heat exchanger 4 is arranged outside the liquid bath 1 and is connected to the condenser 3 via a cooling duct 9.
The heat exchanger 4 includes a fan 41 and a cooling water tank 42, and the liquid cooling circulation system further includes a hydraulic pump 5 and a control valve 6. The hydraulic pump 5, the control valve 6, the condenser 3 and the cooling water tank 42 are connected in series in the cooling pipe 9.
The insulating phase-change cooling liquid 2 is usually mineral oil or other non-conductive medium, and generally has a lower boiling point, for example, the boiling point of 3M fluorinated temperature-control cooling liquid can be 50 ℃, and the phase-change cooling liquid 2 of the embodiment of the present invention can be 3M fluorinated temperature-control cooling liquid. The 3M fluorination temperature control cooling liquid takes away the heat generated by the power unit 7 and then generates phase change gasification. The gaseous cooling liquid rises and is condensed by the condenser 3 to become liquid again and returns to the lower part of the liquid tank 1. Because the boiling temperature of the cooling fluid is within a moderate range, the temperature of the water in the condenser coil does not need to be very low, and the heat exchange requirements can be met by adopting a dry cooler generally. Further, the coolant 2 undergoes a phase change during heat exchange, and therefore, the heat transfer efficiency is high. The cooling liquid in the liquid cooling circulation system can be regarded as a cold source for changing the cooling liquid 2 from a gaseous state to a liquid state.
The cooling liquid in the liquid cooling circulating system is water or glycol antifreeze. The cooling liquid in the tube bank of the condenser 3 flows, the cooling liquid is taken as a medium, and the condenser 3, the hydraulic pump 5, the control valve 6, the heat exchanger 4 and the cooling pipeline 9 form a peripheral liquid cooling circulation system. Under the pressure provided by the hydraulic pump 5, the coolant flows from the hydraulic pump 5 through the control valve 5 into the drain 421 of the heat exchanger 12. The heat exchanger discharge pipe 421 is externally connected with a large number of heat dissipating fins 422 in order to increase the surface heat dissipating area and efficiently carry away the heat of the coolant flowing through the heat exchanger 4. The medium flows through the heat exchanger calandria to reduce the temperature and flows into the calandria of the condenser 5, the cooling liquid absorbs the heat of the gaseous insulating cooling liquid 2 in the calandria of the condenser through the pipe wall, the temperature rises, and finally the cooling liquid flows into the hydraulic pump 5. The medium circularly flows in such a way, the temperature of the medium is increased in the condenser and reduced in the heat exchanger, the peripheral liquid cooling system takes away the heat generated by the phase change of the cooling liquid 2 in the liquid tank 1 through heat exchange, the insulating cooling liquid 2 in the liquid tank 1 continuously takes away the heat of the power unit 7 through the phase change, and finally the liquid cooling liquid 2 in the liquid tank 1 is maintained at a stable working temperature, so that the device of the power unit 7 continuously operates in a stable temperature environment. The immersed power unit needs to adopt a high-sealing structure, so that the components can be far away from the adverse factors of the external environment, and the components are immersed in the completely insulating and non-corrosive liquid, so that the service life of the components can be effectively prolonged.
The material and structural form of the sealed liquid tank 1 have various choices, and can be metal or nonmetal, and the sealing mode of the container can be welding, dispensing or plastic parts produced by an integral mould. The power components (heating devices) can be independently or combined and fixed in the sealed container and are immersed in the cooling liquid 2. The power devices (heating devices) of the embodiment are integrated and distributed on the PCB, and have the advantages of good manufacturability and cost.
During the phase change process, the cooling liquid 2 may escape in the process of evaporating into a gaseous state, so that the requirement on the tightness of the liquid tank 1 is high. In order to prevent the cooling system from the explosion accident caused by the pressure rising in the sealed liquid tank 1, a certain safety facility needs to be provided, for example, a pressure relief valve 14 is provided in the embodiment, the pressure relief valve 14 is installed on the upper part of the housing 11 of the liquid tank 1, an air inlet inside the pressure relief valve 14 is communicated with the gas phase space M on the upper part of the liquid tank 1, and an air outlet outside the pressure relief valve 14 is communicated with the atmosphere.
The AC/DC power units 7 are of a parallel configuration, with an input connector 15 and an output connector 16 mounted on the housing 11 of the tank 1. The parallel input end of the AC/DC power unit 7 is connected with an external AC power supply through an input connector 15 and a cable, and the parallel output end of the AC/DC power unit 7 is connected with an external power utilization circuit through an output end connector 16 and the cable.
The input connector 15 and the output connector 16 are external power and signal connection methods of a typical power unit, and have sealing properties to conduct current and necessary electrical signals through the mutual insertion of the mating connectors. The external electric power and signal connection of the immersed power unit module can also be directly connected through a wire or a copper bar, and the wire or the copper bar is provided with a sealing measure for the liquid inlet tank and the liquid outlet tank.
In order to stabilize the pressure and flow of the liquid cooling system, a water tank can be added in the system; in order to adjust and monitor key parameters of the liquid cooling system, a pressure gauge and a flow meter can be added in the liquid cooling system.
As shown in fig. 1, the cooling water tank 42 has a discharge pipe 41 inside, and a plurality of heat dissipating fins 422 are provided on an outer surface of the discharge pipe 41. The bank of tubes is constructed in a multi-layer S-shaped layout so that the coolant can sufficiently exchange heat with the heat dissipating fins 422 provided on the bank of tubes over as long a path as possible. The fan 41 is disposed at one end of the cooling water tank 42. According to different structures of the heat exchanger, fans can be arranged at both ends of the cooling water tank 42, or the fans can be arranged on the front surface or the back surface of the cooling water tank 42, generally, the blowing direction of the fans is the same as the arrangement direction of the fins 422 of the cooling water tank 42, and the flowing air can take away the heat on the surfaces of the fins to the maximum extent.
Under the trend that new energy automobiles are more and more popular, the power unit cooling system of the electric automobile charging equipment provided by the embodiment of the invention can be directly used for a direct-current charger. The two-phase immersed liquid-cooled direct-current charger comprises all necessary elements of the direct-current charger, such as an alternating-current input distribution switch, an AC/DC power unit, an output direct-current transformer, a direct-current contactor, an auxiliary power supply, a direct-current gun wire, an emergency stop switch, a charging controller and the like, and devices (components) of the direct-current charger are reasonably and orderly arranged in a product case. The AC/DC power unit can directly adopt the two-phase immersed power unit of the power unit cooling system of the electric automobile charging equipment in the embodiment of the invention.
The cooling system for the power unit of the electric automobile charging equipment provided by the embodiment of the invention has the following characteristics:
1) and the heating element of the power unit is immersed in the insulating cooling liquid in the sealed liquid tank. The cooling liquid absorbs heat to be gasified, and the phase change takes place to take away the heat of the heating unit. The gasified cooling liquid rises to the condenser, and the heat absorbed by the condenser is converted into liquid state again to flow back to the liquid tank. The cooling liquid is gasified and liquefied in such a way to repeatedly change and circulate, so that the cooling liquid in the liquid tank is kept in a stable temperature range, and a reliable and stable working environment is provided for the power unit immersed in the cooling liquid.
2) The two-phase immersion liquid cooling system is composed of pump, valve, heat exchanger, liquid pipe and cooling liquid medium, which absorbs heat in the pipe of condenser and flows to the heat exchanger to release heat under the drive of pump.
3) The two-phase immersed liquid cooling power supply system can be used for a direct current charging system, and the immersed liquid cooling system is adopted to replace the existing air cooling system to provide reliable heat dissipation for an AC/DC power unit which is a core component of a charger.
4) The immersed liquid cooling power unit can be provided with an electric connecting terminal with good sealing performance, and the reliability of the liquid cooling system can be further improved.
The external circulation heat exchanger of the two-phase liquid cooling system can dissipate heat in natural cooling, forced air cooling or liquid cooling and other heat exchange modes.
Claims (7)
1. A cooling system of a power unit of electric automobile charging equipment comprises a power unit, a closed liquid tank and a liquid cooling circulating system, and is characterized in that the power unit is immersed in phase-change cooling liquid at the lower part of the liquid tank, the liquid cooling circulating system comprises a condenser and a heat exchanger, and the condenser is arranged in a gas phase space at the upper part of the liquid tank; the heat exchanger is arranged outside the liquid tank and is connected with the condenser through a cooling pipeline.
2. The cooling system of claim 1, wherein the heat exchanger comprises a fan and a cooling water tank, the liquid cooling circulation system comprises a hydraulic pump and a control valve, the hydraulic pump, the control valve, the condenser and the cooling water tank are connected in series in the cooling pipeline, and the cooling liquid in the liquid cooling circulation system is water or glycol antifreeze.
3. The cooling system of claim 1, wherein the phase change coolant is a fluorinated temperature controlled coolant.
4. The cooling system according to claim 1, comprising a pressure relief valve installed in an upper portion of the tank case, an inner side of the pressure relief valve communicating with the gas phase space in the upper portion of the tank, and an outer side of the pressure relief valve communicating with the atmosphere.
5. The cooling system of claim 1, comprising an input connector and an output connector, the input connector and the output connector being mounted on the sump housing; the input end of the power unit is connected with an external alternating current power supply through the input connector, and the output end of the power unit is connected with an external charging connector through the output end connector.
6. The cooling system according to claim 2, wherein the cooling water tank includes an S-shaped bank pipe and a plurality of radiating fins fixed to the bank pipe.
7. The cooling system of claim 1, comprising a plurality of said power cells, said plurality of power cells being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210732979.6A CN115056668A (en) | 2022-06-27 | 2022-06-27 | Cooling system of electric automobile battery charging outfit power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210732979.6A CN115056668A (en) | 2022-06-27 | 2022-06-27 | Cooling system of electric automobile battery charging outfit power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115056668A true CN115056668A (en) | 2022-09-16 |
Family
ID=83202766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210732979.6A Pending CN115056668A (en) | 2022-06-27 | 2022-06-27 | Cooling system of electric automobile battery charging outfit power unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115056668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024061320A1 (en) * | 2022-09-21 | 2024-03-28 | 长春捷翼汽车科技股份有限公司 | Connector having cooling module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107484385A (en) * | 2016-06-08 | 2017-12-15 | 中兴通讯股份有限公司 | A kind of charging pile cooling system and charging pile |
| CN111129653A (en) * | 2020-01-16 | 2020-05-08 | 西安交通大学 | Liquid cooling assisted phase-change material heat exchange battery thermal management system |
| CN212257625U (en) * | 2020-08-11 | 2020-12-29 | 大连理工大学 | Two-phase immersed battery liquid cooling box for filling phase change capsules |
| CN113038807A (en) * | 2021-03-31 | 2021-06-25 | 上海鹄恩信息科技有限公司 | Control method of liquid-cooled electric energy system, liquid-cooled electric energy system and storage medium |
| US20210358657A1 (en) * | 2019-01-16 | 2021-11-18 | The Board Of Regents Of The University Of Oklahoma | Passively cooled high power electric cable, system and method |
| CN113771699A (en) * | 2021-09-10 | 2021-12-10 | 大连理工大学 | Two-phase immersion type liquid cooling electric automobile cold start system based on eddy current heating |
-
2022
- 2022-06-27 CN CN202210732979.6A patent/CN115056668A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107484385A (en) * | 2016-06-08 | 2017-12-15 | 中兴通讯股份有限公司 | A kind of charging pile cooling system and charging pile |
| US20210358657A1 (en) * | 2019-01-16 | 2021-11-18 | The Board Of Regents Of The University Of Oklahoma | Passively cooled high power electric cable, system and method |
| CN111129653A (en) * | 2020-01-16 | 2020-05-08 | 西安交通大学 | Liquid cooling assisted phase-change material heat exchange battery thermal management system |
| CN212257625U (en) * | 2020-08-11 | 2020-12-29 | 大连理工大学 | Two-phase immersed battery liquid cooling box for filling phase change capsules |
| CN113038807A (en) * | 2021-03-31 | 2021-06-25 | 上海鹄恩信息科技有限公司 | Control method of liquid-cooled electric energy system, liquid-cooled electric energy system and storage medium |
| CN113771699A (en) * | 2021-09-10 | 2021-12-10 | 大连理工大学 | Two-phase immersion type liquid cooling electric automobile cold start system based on eddy current heating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024061320A1 (en) * | 2022-09-21 | 2024-03-28 | 长春捷翼汽车科技股份有限公司 | Connector having cooling module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109278590B (en) | Hydrogen fuel cell automobile thermal management system | |
| CN118659059A (en) | Immersed liquid cooling battery system | |
| CN112886093A (en) | Active control type full-immersion liquid cooling power battery thermal management system | |
| CN102544567A (en) | Power battery module with liquid cooling system | |
| CN113771699B (en) | Two-phase immersed liquid cooling electric automobile cold start system based on vortex heating | |
| CN115056668A (en) | Cooling system of electric automobile battery charging outfit power unit | |
| CN115189064A (en) | Energy storage battery module, battery pack and energy storage system | |
| CN216058098U (en) | Cooling device | |
| CN220732162U (en) | Electrical equipment and energy storage system | |
| CN117400762A (en) | Full-immersed liquid-cooled high-power charging system | |
| CN217740580U (en) | Fuel cell system and vehicle | |
| CN216871952U (en) | Phase change cooled IGBT module | |
| CN217721840U (en) | Liquid cooling inverter | |
| CN116742187A (en) | Immersed liquid cooling energy storage system | |
| CN114156249A (en) | Phase change cooled IGBT module | |
| CN215935411U (en) | Cooling cabinet and immersed liquid cooling temperature control system | |
| CN115377564A (en) | Battery module cooling system, battery box and energy storage equipment | |
| US20200403282A1 (en) | Energy storage system | |
| CN218586787U (en) | Connector assembly, cooling system and power utilization device | |
| CN220235267U (en) | Single-phase cooling system | |
| CN218244250U (en) | Mixed liquid cooling device | |
| CN204360859U (en) | Immersion water-cooled high-power high-tension resistive case | |
| CN218919051U (en) | Side-mounted energy storage electric cabinet thermal management system | |
| CN218632330U (en) | Battery pack and electric automobile | |
| CN109066007A (en) | A kind of extensive battery modules integral box cooling system based on heat pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |