EP3787922A1 - Hochgeschwindigkeitsentladesystem für einen hochspannungsenergiespeicher - Google Patents
Hochgeschwindigkeitsentladesystem für einen hochspannungsenergiespeicherInfo
- Publication number
- EP3787922A1 EP3787922A1 EP19720532.1A EP19720532A EP3787922A1 EP 3787922 A1 EP3787922 A1 EP 3787922A1 EP 19720532 A EP19720532 A EP 19720532A EP 3787922 A1 EP3787922 A1 EP 3787922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- inverter
- discharge system
- speed discharge
- line
- 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
Classifications
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- 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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
-
- 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
- B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
-
- 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
- B60L53/20—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 characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
-
- 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
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T90/14—Plug-in electric vehicles
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
Definitions
- the invention relates to a discharge system for a high voltage source.
- This disclosure relates to electrically powered vehicles, and more particularly, but not exclusively, to a discharge device for a high voltage power storage device for selectively discharging energy stored in a high voltage power source of an electrically operated vehicle.
- Hybrid electric vehicles HEVs
- plug-in hybrid electric vehicles PHEVs
- battery electric vehicles BEVs
- fuel cell vehicles and other well-known electric vehicles from conventional motor vehicles in that they are powered by one or more electric machines (ie, electric motors and generators) instead of or in addition to an internal combustion engine.
- the supply of high voltage power for powering these types of electric machines is typically accomplished by a traction battery system having one or more battery cells that store energy.
- so-called high-voltage memory cells are used whose operating voltage is well above 48V, eg at 650 V.
- the discharge of a high-voltage battery can, for. B. by activating all electrical consumers, such as interior heating, air conditioning ge, heated rear window, headlights and heated seats.
- electrical consumers such as interior heating, air conditioning ge, heated rear window, headlights and heated seats.
- power of a few kilowatts flow.
- the unloading process takes about three hours. Pure electric vehicles with energy contents of up to 100 kWh would take about a day to complete.
- a solution is known in which a sensor is provided which is designed so that it detects egg nen parameter of a high voltage source and a controller in communication with the sensor and a discharge circuit, which energy stored in the high voltage source, in response to a command signal from the controller discharges.
- the discharge circuit comprises a plurality of resistors which are connected in parallel with one another.
- Such and similar known solutions are, but not suitable, a vehicle battery with a charging capacity between 20 KW and 50KW or greater (at a typical operating voltage between 300V and 450V to partly 1000V). sufficiently fast to discharge. So that at a battery voltage of z. B.
- the invention is therefore an object of the invention overcome above-mentioned disadvantages and to propose a solution for a test stand for cost-effective, fast and efficient unloading of a high voltage energy storage, the
- a high-speed discharge system for discharging a high-voltage energy store via a grid connection into a conventional power grid up to a certain residual charge (SOC) of the charging capacity, comprising a grid-side connected inverter which is connected via a connecting line to a junction box arranged on or in the high-voltage energy store can be connected or connected and during operation of the high-speed discharge between the inverter and the high-voltage energy storage an intermediate circuit voltage U Z K is applied, further comprising a control device is provided, which ensures during the discharge that the intermediate circuit voltage U ZK is greater than the peak value of the network change - Voltage U Ne tz of the power grid.
- SOC residual charge
- Control device comprises a transformer which is netzwoodssei tig between the inverter and the power supply, said transformer having a transmission ratio to the output voltage U Ne tz_neu at the inverter to at least the mains voltage U Ne tz raise, in the event that the voltage U Netz-neu is lower than that of the mains voltage U Ne tz ⁇
- the inverter works unloading by not drawing the energy from the mains, but taking it from the high-voltage battery and feeding it into the grid. Due to the high battery capacity of a high voltage energy storage device, the battery voltage remains almost stable throughout the discharge until the SOC of the battery, which could increase the current flow to values higher than 100A, but this is prevented by current limiting.
- the minimum possible intermediate circuit voltage must be above the peak value of the mains voltage. Since the vehicle test stand must be able to discharge the vehicle battery to a customer SOC of 0%, achieving a minimum DC link voltage is absolutely necessary.
- SOC stands for "State of charge” and describes the state of charge of the vehicle battery in percent. Due to the prevailing mains voltage, which is currently typically above the minimum DC link voltage, the aforementioned transformer is required.
- a DC / AC feed is not performed, but specifically a DC / DC feed via a converter unit in order to store the electrical energy in a buffer memory. It is further preferred to provide a device with a switching branch in order to be able to use both discharge options and preferably to switch the discharge path to the buffer reservoir and / or the mains connection by means of a controller.
- a zero-current control is realized. In this case, the control is designed in such a way that, as far as possible, no feedback, ie "zero" current, flows into the network, but rather the power supply. as long as self-consumption is possible, fed into the "own" network to the consumers, or preferred for charging reserves
- Discharge process is used to load the DC buffer.
- the controller can make a targeted current flow regulation by the user in accordance with an individually selectable prioritization, which further adapts itself dynamically, depending on time variant sizes.
- the discharge behavior at night tariff times can be controlled differently than at the time of day tariffs, whereby in each case preferably the zero-current control is superimposed as a control loop.
- a combination filter and preferably still a line filter are arranged for filtering high-frequency voltage disturbances, the combined filter further preferably comprises a throttle.
- Another aspect of the present invention relates to the fact that the high-voltage energy storage is installed in a vehicle at its intended in accordance installation location.
- the cables of the PTC interior heating and of the electric air conditioning compressor (EKK) are too weakly dimensioned for connection. No energy can be drawn from the AC charging socket (LD), as the on-board charger (OBC) can supply power to the high-voltage battery but can not operate any consumers via the charging socket. Since a standardized DC charging socket is currently not available on many vehicles, the use of this cable would definitely restrict the compatibility of the high-speed discharge system.
- Traction cables between power electronics (LE) are subjected to AC voltage, so that here too no suitable connection to the high-voltage battery can be created.
- the invention thus comprises the high-speed discharge system in a preferred embodiment, a cable set comprising the connec tion line and two breakout boxes.
- the first breakout box is provided with a connector for connecting the connection cable to the vehicle's junction box.
- the connection line of the first breakout box extends into the second breakout box, from where a detachable connection line leads as part of the cable set to the control cabinet or inverter.
- the second breakout box three cable pairs of the cable set from each of a high-voltage lines (HV +) and a high-voltage lines (HV) run, in each case the high-voltage lines (HV +) and the high-voltage lines (HV-) via a common Busbar (71 and 72) are electrically connected to each other.
- a line pair leads (out of the breakout box) to egg nem attached to the breakout box connector (housing connector), which provides the interface for connecting the circuit to the inverter with the inverter.
- HV +, HV- Another line pair (HV +, HV-) is led out through cable bushings from the second breakout box for connection to the power electronics (LE) of the vehicle.
- L power electronics
- the first and second breakout boxes each have a metallic in particular shielded housing, which are connected to a common equipotential bonding line (PE), which leads to the connector for connecting the inverter to the connection of a connection line to the inverter at the same time establish a connection to an external equipotential bonding.
- PE equipotential bonding line
- a mechanical unlocking and locking device is provided on the second breakout box, which is designed such that a locking bracket (for locking the plug connection) is provided which is in a position when the plug connection is locked With an inserted mating connector, a position switch in the breakout box is operated directly or indirectly.
- An actuating tappet for the position switch can be arranged in the direction of actuation behind the locking bracket, so that it is actuated when the shutter is opened.
- the position switch is used to realize a break contact with double break, which safely disconnects the emergency stop circuit.
- the vehicle test bench is advantageously implemented in such a way that a control cabinet is provided in which the inverter is accommodated and leads a line to the mains connection of a three-phase network (L1, L2, L3).
- Another aspect of the present invention relates to a method of discharging a high voltage energy storage in a vehicle having a high speed discharge system as described above.
- the driving readiness of the vehicle is produced directly or via a manipulation of the vehicle control unit and then the unloading process is started.
- the preparation of the driving readiness is necessary insofar as a discharge is even permitted by the on-board electronics of a vehicle.
- An initially obvious possibility for producing the unloading readiness is to activate the ignition of the vehicle by means of the start / stop button.
- the signal from the on-board power supply control unit is read in, which closes the corresponding relay. If the gateway is supplied with power, the HVK causes the high-voltage contactors to close.
- the terminal is automatically deactivated again after a few minutes. This has the consequence that the contactors open and the unloading process is interrupted. Thus, this variant is unsuitable for discharging a high-voltage battery.
- Energy is stored in the battery. Furthermore, the battery current is monitored. Here, a parameter determines the amount of current that may flow permanently, without the battery management system having a Reduction of the current flow causes.
- the limit and measured values of the battery management system are communicated via a CAN bus and thus made available to all bus users. So that no further line from the test bed to the vehicle to be unloaded must be performed, the CAN communication should be carried out in an advantageous manner by radio transmission.
- a transmitter and a receiver module are used, wherein the transmitter is connected to the vehicle and supplied from the 12 V starter battery.
- the receiver is connected to the PLC via CAN cables at the test bench.
- FIG. 1 is a schematic representation of an embodiment egg nes high-speed discharge system
- Fig. 2 is an illustration of the voltage level between the high
- FIG. 3 shows a cable set for connecting the high-voltage energy supply chers with the inverter and the power electronics
- FIG. 4 shows a schematic partial view of a vehicle with a part of the components of the fluid speed ignition system
- FIG. 6 shows a schematic view of a wiring of the inverter in the control cabinet
- Fig. 7 is a flowchart for explaining the unloading process; 8 shows an exemplary voltage profile during the discharge process and
- FIG. 1 shows a schematic representation of an embodiment of a high-speed discharge system 1
- High-speed discharge system 1 is designed for discharging a floating-voltage energy storage device 10 via a network connection N into a public or private power grid up to a specific residual charge SOC of the charging capacity.
- the SOC is a value specified by the manufacturer up to which a battery cell or energy cell should be discharged to the maximum in order to ensure a long service life.
- the high-speed discharge system 1 comprises an inverter 20 which is connected to the grid and which can be connected or connected via a connecting line 2 to a junction box 61 (as shown by way of example in FIG. 4) arranged on or in the high-voltage energy store 10. Furthermore, mains voltage side in the connection between the inverter 20 and the power connection N, a combi filter 40, a mains filter 50, a choke 51 and a transformer 30 are arranged. The filters and the choke are used to filter out high-frequency voltage fluctuations and current peaks.
- an intermediate circuit voltage UZK is applied between the inverter 20 and the high-voltage energy store 10, wherein a control device 30 is also provided which ensures during the discharging process that the intermediate circuit voltage UZK is greater than the peak value of the network change voltage U. Network of the electricity network is.
- the transformer 30 is provided, the mains voltage side between the inverter 20 and a Netzan circuit N is arranged, the transformer 30 has a gear ratio to the output voltage U Ne t z _neu at the inverter 20th to at least the mains voltage U Ne t z , in the event that the voltage U Ne tz_ n eu is lower than that of the mains voltage U Ne tz ⁇
- the high voltage energy storage 10 is discharged with a power of up to 48 kW.
- FIGS. 3 and 4 it is shown how the cable set according to the invention is designed to connect the high-voltage energy store 10 to the inverter 20 and the power electronics LE.
- the cable set comprises a first and a second breakout box 60, 70 respectively connected to the connection line 2.
- the breakout box 60 is equipped with a connection 63 for connecting the connection line 2 to the junction box 61.
- the first breakout box 60 is connected to the second breakout box 70 via the lines 2 of the line pair HV + and HV-.
- the second breakout box 70 three pairs of lines each consisting of a high-voltage line HV + and a high-voltage line HV- are provided, wherein on the one hand the three high-voltage lines HV + and on the other hand the three high-voltage lines HV- via a common busbar 71 and 72 with each other are electrically connected.
- Each busbar 71, 72 is electrically isolated from the other busbar and from the housing.
- a line pair HV +, HV- leads to a connector 73 attached to the breakout box 70, which establishes the interface for connecting the connection line 2 to the inverter 20.
- Another line pair HV +, HV- leads out through cable bushings from the second breakout box 70 and indeed for connection to the power electronics LE of the vehicle, as is shown schematically in FIG.
- the first and second breakout boxes 60, 70 each have a metallic, in particular shielded housing 65, 75, which are connected to a common equipotential bonding PE, which leads to the connector 73 and from there to the not shown in detail control cabinet of the vehicle.
- PE equipotential bonding
- FIG. 3 also shows a mechanical unlocking and locking device 80, namely at the second breakout box 70.
- the latter is designed such that a locking bow 73a of the plug connector 73 is in a position for locking the plug connection with an inserted mating plug 74 (FIG. which is connected to the connecting line to the inverter or control cabinet), a position switch 81 in Breakoutbox indirectly or directly operated.
- This makes it possible to ensure that an unlocking lock can be realized in a simple and cost-effective manner. If an operator would like to release the mating connector 74 from the plug-in connector 73 under load, this would already occur when opening the connector.
- locking bracket 73a of the position switch 81 is actuated and the load path un interrupted.
- FIG. 5 shows a schematic view of components for establishing a possibility of vehicle operational readiness for a discharge process.
- the preparation of the unloading readiness is to activate the ignition of the vehicle.
- the signal of the start / stop button is read in by the onboard supply control unit, which closes the relay at terminal 15. If the gateway is supplied with voltage, closing of the high-voltage contactors is initiated. However, not only is the actuation of the start / stop button initiated, but also the actuation of the brake is controlled by a PLC. In the general part of the description of the invention, another way is explained to prepare the vehicle operational readiness for a discharge.
- FIG. 5 schematically shows the course of the load path in the control cabinet of the vehicle test stand.
- a switch-disconnector is installed, which is operated by a built-in lever in the door.
- the tap is taken to the pre-charging contactor, which is protected by a 25 A fuse. From there, the terminals L1, L2 and L3 of the inverter are contacted. This contactor only serves to pre-charge the inverter-side DC link. As soon as the set intermediate circuit voltage is reached, the pre-charging contactor is opened and the line contactor is closed. Thus, the inverter is ready for operation.
- the output of the line choke is via the line contactor with the terminals U, V and W. connected to the inverter.
- FIG. 7 shows a flow chart of a software support
- Inverter in a certain operating mode in order not to operate the inverter in the usual basic setting for operation under high overload. Since during dynamic discharging of a high-voltage battery no dynamic changes in the current characteristic are to be expected, the rated current may be increased to the maximum value. In addition, the desired intermediate circuit voltage can be adjusted by setting a parameter.
- the DC contactors within the test stand are initially open and the regenerative current limit is set to the minimum achievable value of 3%. This variable controls the discharge capacity.
- the current battery voltage U Batt is transmitted via the CAN bus and the switching state is set by means of z.
- the preparations for closing the DC contactors are made first. For this, the setpoint DC link voltage is raised to the battery voltage plus 15 V and the inverter is given the controller enable so that it can set the DC link voltage to the desired value. After a waiting period of two seconds, closed the DC contactors. At this point, a timer is necessary because changing the intermediate circuit voltage takes several hundred milliseconds in entitlement. Thereafter, another time delay of two seconds takes place. This prevents the power from being raised while the contactors are closing.
- the set DC link voltage is set to 280 V. This voltage is chosen because it is above the minimum DC link voltage of 243V but less than the minimum required battery voltage of 300V. It must be ensured that the set DC link voltage is always below the battery voltage so that the inverter can reach the specified current limit. As long as the inverter is operated in its current limit, the intermediate circuit voltage can no longer be acted upon. Permanently queried are several parameters. The state of the Discharge button is required in order to be able to terminate the unloading process manually. The target SOC and the current SOC must be permanently compared therewith, so that the discharge process when reaching the ge desired state of charge of the high-voltage battery 10 is terminated. For the calculation of the discharge power, the battery voltage and the
- Discharge current needed In addition, an operator can choose to unload at maximum power or at lower power. This selection is made via a controller on the touch display and is stored in the variable P_soii_Regier.
- the variable P_ e ntiade_belot serves as an auxiliary variable. Before the calculated value can be assigned to the parameter regenerative current limit, it must first be checked for plausibility. For a calculated power, which is greater than the maximum allowed 48 kW, the value 100% is stored in the generator current limit parameter. Since values smaller than 3% lead to a malfunction of the inverter, they must never be transmitted. Values between 3% and 100% are unchanged in the parameter for the genera- toric current limit stored.
- Discharge power is reduced to the minimum value of 3% and the DC link voltage is increased to the current battery voltage plus 15 V.
- the inverter operates as a generator and due to the permanently set motor current limit of 0%, the current flow can be reduced to a minimum.
- the DC contactors are opened, the inverter is de-energized and the program can start again from the beginning.
- FIG. 8 shows the profile of the mains voltage, the intermediate circuit voltage and the SOC as a function of time.
- the program flow is particularly easy to recognize.
- the DC contactors When the DC contactors are open, the DC link voltage corresponds to the minimum voltage of 243 V.
- the Discharge button is activated, the DC link voltage is increased to 436 V. This value corresponds to the battery voltage plus 15 V.
- the DC contactors are closed. Since the motor current limit is 0% and thus no current flow is permitted, the target DC link voltage of 436 V can not be maintained.
- the DC link voltage is drawn from the high-voltage battery to its current voltage level.
- the setpoint DC bus voltage is reduced and the regenerative current limit is set to the value of 100%. Due to the high current flow and the internal resistance of the high-voltage battery, the intermediate circuit voltage drops to 408 V. During the
- Discharging process decreases the battery voltage in addition to the SOC, until it has reached its minimum voltage of 360 V.
- the mains voltage during idle is 403 V and is during the feed-in solution is raised to 405 V in order to be able to achieve a current flow in the line direction.
- the current limit is set to 3%, and raised again the intermediate circuit voltage to 15 V. After a waiting time of 2 s, the DC contactors are opened. After that, the inverter-side intermediate circuit voltage drops back to its minimum value of 243 V.
- FIG. 9 shows the discharge currents and the discharge capacities as a function of time. It can be seen here that, despite a constant DC link current l z, the current on the 400 V mains side l Ne tz decreases slowly. This is the effect of decreasing battery voltage. With constant mains voltage and decreasing discharge power, the level of current I Net2 must therefore decrease. As soon as the discharge current is limited by the battery management system, a clear decrease of the discharge power PZK and consequently also P Ne tz can be seen.
- the invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102018110621.1A DE102018110621A1 (de) | 2018-05-03 | 2018-05-03 | Hochgeschwindigkeitsentladesystem für einen Hochspannungsenergiespeicher |
PCT/EP2019/060656 WO2019211172A1 (de) | 2018-05-03 | 2019-04-25 | Hochgeschwindigkeitsentladesystem für einen hochspannungsenergiespeicher |
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EP3787922A1 true EP3787922A1 (de) | 2021-03-10 |
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Application Number | Title | Priority Date | Filing Date |
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EP19720532.1A Pending EP3787922A1 (de) | 2018-05-03 | 2019-04-25 | Hochgeschwindigkeitsentladesystem für einen hochspannungsenergiespeicher |
Country Status (3)
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EP (1) | EP3787922A1 (de) |
DE (1) | DE102018110621A1 (de) |
WO (1) | WO2019211172A1 (de) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20170302095A1 (en) * | 2016-04-18 | 2017-10-19 | Vitec Videocom Inc. | Smart charger with selective discharge capability |
CN111907339A (zh) * | 2020-07-08 | 2020-11-10 | 宝能(广州)汽车研究院有限公司 | 车辆斜坡启动控制方法、装置及车辆 |
DE102021126411A1 (de) | 2021-10-12 | 2023-04-13 | Bpw Bergische Achsen Kommanditgesellschaft | Elektrisch angetriebenes Nutzfahrzeug, sowie Hochvoltantriebssystem für ein Nutzfahrzeug |
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DE102006039974A1 (de) | 2006-08-25 | 2008-03-13 | Semikron Elektronik Gmbh & Co. Kg | Stromrichterschaltungsanordnung und Verfahren zur Netzeinspeisung aus einer Gleichspannungsquelle |
WO2012157116A1 (ja) * | 2011-05-19 | 2012-11-22 | トヨタ自動車株式会社 | 車両の電源装置 |
WO2013097816A1 (zh) * | 2011-12-31 | 2013-07-04 | 深圳市比亚迪汽车研发有限公司 | 电动汽车的充电系统及具有其的电动汽车 |
EP3006244A4 (de) * | 2013-06-07 | 2016-07-06 | Nissan Motor | Hybridfahrzeugsteuerungsvorrichtung |
JP2015035848A (ja) * | 2013-08-07 | 2015-02-19 | パナソニックIpマネジメント株式会社 | 電力供給システム、放電装置 |
US9240693B2 (en) | 2013-12-05 | 2016-01-19 | Ford Global Technologies, Inc. | Battery discharge device with self-adjusting resistance |
DE202014102609U1 (de) * | 2014-06-04 | 2015-09-10 | Leoni Bordnetz-Systeme Gmbh | Hochvolt-Verteilerbox insbesondere für ein Kraftfahrzeug |
CN204155896U (zh) * | 2014-11-11 | 2015-02-11 | 江苏由甲申田新能源科技有限公司 | 一种手动维修开关 |
CN204315856U (zh) * | 2014-12-11 | 2015-05-06 | 华晨汽车集团控股有限公司 | 一种汽车高压连接器互锁机构 |
CN204870829U (zh) * | 2015-06-15 | 2015-12-16 | 上汽通用五菱汽车股份有限公司 | 一种微小型电动车用高压配电箱 |
-
2018
- 2018-05-03 DE DE102018110621.1A patent/DE102018110621A1/de active Pending
-
2019
- 2019-04-25 EP EP19720532.1A patent/EP3787922A1/de active Pending
- 2019-04-25 WO PCT/EP2019/060656 patent/WO2019211172A1/de active Application Filing
Also Published As
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WO2019211172A1 (de) | 2019-11-07 |
DE102018110621A1 (de) | 2019-11-07 |
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