CN117062730A - Power supply system comprising a bidirectional charger and a battery, capable of powering an external load when connected to a power supply network, and method for controlling such a system - Google Patents
Power supply system comprising a bidirectional charger and a battery, capable of powering an external load when connected to a power supply network, and method for controlling such a system Download PDFInfo
- Publication number
- CN117062730A CN117062730A CN202280024680.3A CN202280024680A CN117062730A CN 117062730 A CN117062730 A CN 117062730A CN 202280024680 A CN202280024680 A CN 202280024680A CN 117062730 A CN117062730 A CN 117062730A
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- power supply
- switching device
- fast switching
- current
- supply system
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 17
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000013589 supplement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/006—Supplying electric power to auxiliary equipment of vehicles to power outlets
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to an electric power supply system including: a bidirectional charger (3) connected to the battery (2), a power outlet (6) configured to allow the supply of electric charge, and a switching device (5) rapidly configured to be connectable to a power network. The system comprises a first current sensor (8 a) between the bidirectional charger (3) and the fast switching device (5), a second current sensor (8 b) between the power outlet (6) and the bidirectional charger (3), a voltage sensor (8 c) at the output of the fast switching device (5) and a sensor (8 d) for sensing the state of charge of the battery, and a control device (7) connected to the sensors (8 a,8b,8c,8 d), the bidirectional charger (3) and the fast switching device (5), the control device being configured to control the bidirectional charger and the fast switching device based on measurements from the sensors and the state of charge of the battery.
Description
Technical Field
The technical field of the invention is electric power supply systems, and more particularly such systems provided with batteries.
Some users require a household electrical outlet (230V) to be installed on their vehicles in order to be able to connect the device thereto. Such a need is known in particular to the handicapped, the user of a utility vehicle, in particular for connecting computers, electric heaters or cooling devices, specific tools, or for recharging other vehicles, etc.
Several technical solutions make it possible to provide such services to users:
to connect low power devices (less than 300W), an inverter connected to the 12V network of the vehicle may be added on any type of vehicle.
In order to connect higher power devices, the heat engine vehicle may be used as a generator set with coupling to a generator.
In order to connect devices with power up to 1000W or 2000W to electric or hybrid vehicles, an inverter connected to the vehicle traction battery may be added.
Another solution that may be used in rechargeable electric or hybrid vehicles, which is more advantageous in terms of compactness and connection power, is to use a charger for the vehicle traction battery in a bi-directional mode. In this case the available power of the device may be in the same order of magnitude as the power of the battery charger, that is to say typically 3.7kW or 7kW, even 11kW.
Further, voltage control is implemented when the bidirectional charger generates a voltage intended for an external load. The set point is to provide and maintain a 230V voltage within the desired limits.
However, when the bidirectional charger is connected to a charging terminal that supplies a current greater than that required by an external load, current control is performed. In practice, the setpoint is then used to regulate the current according to the load's needs.
Finally, when the bidirectional charger is connected to a charging terminal that supplies a current lower than that required by an external load, current control is also implemented, but the charger operates as an inverter. In effect, the charger supplements the charging terminal by drawing DC energy from the battery. The frequency is always determined by the power supply network through the recharging terminals.
One technical problem that may occur during use is to charge the battery of his or her electric vehicle (charger mode), if possible, while powering an external load connected by the user (inverter mode). The two modes of use of the power converter (inverter and charger) are a priori conflicting.
Another technical problem is to have a switching device that can ensure that the charger can be switched from one control mode to another in a manner transparent to the external load.
Background
Many heat engine vehicles provide a low power electrical outlet using an inverter connected to a low power network.
Some electric or hybrid vehicles provide approximately 1kW to 2kW of power using an inverter connected to a network of traction batteries.
In both cases, the addition of inverters is not an optimal solution from a compactness point of view, and the power of these solutions is still limited. A charger must be provided to charge the traction battery and an inverter must also be provided to power the household outlet.
Only some vehicles from manufacturers use bi-directional chargers.
In particular, it is proposed to equip the vehicle with an internal power outlet capable of delivering up to 2.2kW of power. However, the power outlet is not operational when the vehicle is connected to the power grid. The invention therefore consists in allowing two functions to be managed simultaneously: on the one hand, the external load connected by the user is supplied in inverter mode, and on the other hand, the battery of the electric vehicle is charged and is allowed to switch between voltage control mode and current control mode depending on the power involved by the load and the recharging terminal.
Disclosure of Invention
One subject of the present invention is a power supply system comprising: a bi-directional charger connected to a battery, a fast switching device and a fast switching device configured to be connectable to a power supply network, the fast switching device configured as a power supply outlet that can power a load, the system comprising: a first current sensor located between the bi-directional charger and the fast switching device, a second current sensor located between the power supply socket and the bi-directional charger, a voltage sensor located at an output of the fast switching device and a sensor of the state of charge of the battery, and a control device connected to the sensor, the bi-directional charger and the fast switching device, the control device being configured to control the bi-directional charger and the fast switching device at least in dependence on the measurements of the sensor and the state of charge of the battery.
The fast switching device may be a Triac-type electronic switch.
The fast switching device may be connected to the power supply network via a recharging plug configured to be connected to the recharging terminal and to exchange data with the control device.
Another subject of the invention is a motor vehicle provided with an electric power supply system as defined above.
Yet another subject of the invention is a method for controlling an electric power supply system as defined above, wherein the following steps are performed:
determining whether current is circulating through the power supply socket,
if this is the case, it is determined whether the power supply system is connected to the power supply network, and then it is determined whether the connection state with the power supply network is changed,
when the power supply system is not connected to the power supply network and the connection state with the power supply network is changed,
measuring the voltage change between the fast switching device and the power supply network and the current change between the bidirectional charger and the power supply socket,
controlling the bi-directional charger such that the electrical signals on both sides of the fast switching device are synchronized,
if this is the case, the current set point is determined from the power consumed or supplied by the battery, the power supply network and the load,
-controlling the fast switching device such that it switches from an off-state to an on-state, and
controlling the bi-directional charger such that it switches from voltage-controlled inverter mode operation to current-controlled inverter mode operation or current-controlled rectifier mode operation by applying a current setpoint,
when the power supply system is connected to the power supply network and the connection state with the power supply network is changed,
determining a current set point from the power consumed or supplied by the battery, the power supply network and the load,
-controlling switching to a voltage controlled inverter mode by applying the current setpoint, and
-controlling the fast switching device such that it switches from an on state to an off state.
Whether the power supply system is connected to a power supply network may be determined via information exchanged with the charging terminal through a data connection of the recharging plug, via measuring a voltage upstream of the fast switching device, or when the power supply system is connected to a standardized power outlet.
Drawings
Other objects, features and advantages of the present invention will become apparent from reading the following description, given purely by way of non-limiting example and with reference to the accompanying drawings, in which:
figure 1 shows the main elements of the power supply system according to the invention, an
Figure 2 shows the main steps of a method for controlling an electric power supply system according to the invention.
Detailed Description
Fig. 1 shows the structure of the power supply system. The power supply system 1 comprises a battery 2 connected to a bi-directional charger 3, the bi-directional charger 3 being connected to a power supply network via a fast switching device 5. In one embodiment, the recharging plug 4 may connect the fast switching device 5 to the power supply network via an external recharging terminal. The power supply socket 6 is also connected to the bidirectional charger 3 so as to be able to supply power to the load.
The power supply system 1 further comprises a control device 7 which can perform the steps of the control method based on measurements from the sensors 8a,8b,8c, 8d.
The sensors 8a,8b,8c,8d comprise a first current sensor 8a located between the bi-directional charger 3 and the fast switching device 5, a second current sensor 8b located between the power supply socket 6 and the bi-directional charger 3, a voltage sensor 8c located at the output of the fast switching device 5, between the fast switching device and the power supply network, and a sensor 8d of the state of charge of the battery.
The control means 7 comprise at least one memory and at least one processor capable of executing software instructions forming the control method. The control device 7 is connected to the sensors 8a,8b,8c, the bidirectional charger 3 and the fast switching device 5. The fast switching device is preferably an electronic switch of the triac type to avoid the contact bounce effect of a mechanical switch of the relay type.
In a particular embodiment, the control device 7 is also connected to the charging terminal through the recharging plug 4, in order to determine the available power and to control the switching of the terminal.
When the power supply system is connected by the recharging plug, the control means determine the current set point to be generated from the power available from the power supply network, the power available in the battery and the power consumption at the power supply socket. The current set point is then limited by the maximum power available to power the system.
In one embodiment, the recharging plug is provided with a data connection which can determine the maximum current allowed by such a terminal when the power supply system is connected to the charging terminal, and control the provision of power.
Alternatively, the value is implicitly known when the power supply system is connected to the power supply network via a standardized power supply socket.
Table 1 shows different examples of current set points for a power supply system connected to a charging terminal.
TABLE 1
In the first example of table [ table 1], the current available at the terminal is much greater than the current consumed by the load. The battery is capable of receiving high energy. The current set point corresponds to the difference between the maximum current at the terminal and the current consumed.
In a second example, the current available at the terminal is much less than the current consumed by the load. The battery is capable of receiving high energy. The current set point corresponds to the difference between the maximum current at the terminal and the current consumed. Here, the current set point is a negative set point, meaning that the battery must be discharged to supplement the power supplied by the terminals in order to maintain power supply to the load.
In a third example, as in the first example, the current available at the terminal is much greater than the current consumed by the load.
Otherwise, the battery is only able to accept limited energy here. The current set point is then less than the difference between the maximum current at the terminal and the current consumed so as not to saturate the battery.
In a fourth example, the power supply system is not connected to the recharging terminal. The available current at the terminal is then zero. The battery is capable of receiving high energy. The current set point corresponds to the difference between the maximum current at the terminal and the current consumed. Here, the current set point is a negative set point equal to the consumption of the load, meaning that the battery must be discharged to supply all the power consumed by the load.
The control device then controls the charger mode or the inverter mode of the bidirectional charger according to the determined current setpoint, according to the voltage mode control or the current mode control. It should be remembered that the current set point corresponds to the difference between the maximum current at the terminal and the current consumed.
The control method is illustrated by the accompanying figure 2 and comprises the following steps.
During a first step 11, the current circulating between the bidirectional charger and the power supply socket is measured using the second current sensor 8 b.
During a second step 12, it is determined whether a load is connected to the power supply outlet based on a measurement of the current circulating between the bidirectional charger and the power supply outlet.
If this is not the case, the method is restarted at a first step 11.
If this is the case, the method continues with a third step 13 during which it is determined whether the power supply system 1 is connected to the power supply network. According to an embodiment, this information may be determined using the data connection of the recharging plug 4 when the power supply system is connected to the power supply system by such plug. In another embodiment, measuring the voltage upstream of the fast switching device may determine the connection to the power supply network.
If the power supply system 1 is not connected to the power supply network, the method continues with a fourth step 14 during which a change in the connection status to the power supply network is determined.
The bi-directional charger operates in a voltage controlled inverter mode when the power supply system is not connected to the power supply network and is supplying power to the external load. In practice, energy is taken from the battery in the form of a DC voltage and supplied to the external load in the form of an AC voltage. Otherwise, when connected to the power supply network, the bi-directional charger must be controlled in current mode because the voltage is set by the power supply network through the recharging terminal. In addition, the bi-directional charger operates in inverter mode when the bi-directional charger must supplement the missing power from the terminal to power the external load, depending on the energy supplied by the terminal. When the power of the terminal is sufficient to power the external load, the bi-directional charger operates in rectifier mode, and the remaining power supplied by the terminal is used to charge the battery 2.
Upon switching from one operating mode or control mode to another, the electrical signals upstream and downstream of the recharging plug must be synchronized and the switching speed must be fast enough so as not to be compatible with the changes in control of the bi-directional charger and not to be perceived by the load.
When the connection status with the power supply network changes, the method continues with a fifth step 15.
During a fifth step 15, the voltage change between the fast switching device and the power supply network is measured using the voltage sensor 8c at the output of the fast switching device and the current change upstream of the power supply socket 6 is measured using the second current sensor 8b at the input of the power supply socket 6.
The bi-directional charger is then controlled such that the electrical signal (voltage or current) circulating between the bi-directional charger and the power supply socket 6 corresponds to the peak value and frequency of the energy circulating between the fast switching device and the power supply network, thus exhibiting zero phase shift.
When the electrical signals on both of the fast switching means are synchronized, during a sixth step 16 the fast switching means 5 is controlled such that it switches from an off-state to an on-state and the bi-directional charger 3 is controlled such that it switches from voltage controlled inverter mode operation to current controlled inverter or current controlled rectifier mode operation, depending on the difference between the power supplied by the recharging terminal and the power required by the external load. The method then resumes at a first step 11. The fast switching means 5 allow fast switching suitable for switching when the electrical signals are synchronized and for changing the current/voltage control mode. In the case of connection to a charging terminal, faster switching than that performed by the charging terminal is also allowed. In fact, for safety reasons (IEC standard 61851-1), the charging terminal may quickly disconnect in a matter of hundred milliseconds, but may only be guaranteed to connect in a matter of seconds. In fact, no standard is applicable to this operating phase and the use of slower relays can reduce the cost of the terminal without fundamentally changing the charging time which in all cases requires tens of minutes.
If during the third step 13 it has been determined that the power supply system 1 is connected to a recharging terminal, the method proceeds to a seventh step 17.
During a seventh step 17, a change in the connection status with the power supply network is determined. In other words, when the external load is powered by the power supply system, disconnection of the power supply system from the power supply network is also monitored. As noted above, according to various embodiments, this information may be determined using the data connection of the recharging plug 4 when the power supply system is connected to the power supply system through such plug. In another embodiment, measuring the voltage upstream of the fast switching device may determine the connection to the power supply network.
When the connection state with the power supply network changes, the method continues with an eighth step 18 during which the charger is controlled in voltage-controlled inverter mode and the fast switching device is controlled such that it switches from the on-state to the off-state. The method then resumes at a first step 11.
In one mode of embodiment, the electric power supply system 1 is incorporated into a motor vehicle having electric or hybrid traction, then the battery of the electric power supply system is composed of the traction battery of the vehicle, and the bidirectional charger is composed of an embedded charger.
As a variant, in another mode of embodiment, the power supply system 1 may be incorporated into a portable generator set.
Claims (6)
1. An electric power supply system, the electric power supply system comprising: a bidirectional charger (3) connected to the battery (2); a fast switching device (5); and a power supply socket (6) configured to be able to supply power to a load, the fast switching device (5) being configured to be connectable to a power supply network, the system comprising: a first current sensor (8 a) located between the bidirectional charger (3) and the fast switching device (5); a second current sensor (8 b) located between the power supply socket (6) and the bidirectional charger (3); a voltage sensor (8 c) at the output of the fast switching device (5); and a sensor (8 d) of the state of charge of the battery; and a control device (7) connected to the sensors (8 a,8b,8c,8 d), the bidirectional charger (3) and the fast switching device (5), the control device being configured to control the bidirectional charger and the fast switching device based on the measurements of the sensors and the state of charge of the battery.
2. Power supply system according to the preceding claim, wherein the fast switching device (5) is an electronic switch of the triac type.
3. Power supply system according to any one of the preceding claims, wherein the fast switching device (5) is connected to the power supply network via a recharging plug (4), the recharging plug (4) being configured to be connected to a recharging terminal and to exchange data with the control device (7).
4. A motor vehicle provided with an electric power supply system according to any one of the preceding claims.
5. A method for controlling the power supply system according to any one of claims 1 to 3, wherein the following steps are performed:
determining whether current is circulated through the power supply socket (6),
if this is the case, it is determined whether the power supply system is connected to the power supply network, and then it is determined whether the connection state with the power supply network is changed,
when the power supply system is not connected to the power supply network and the connection state with the power supply network is changed,
measuring the voltage variation between the fast switching device (5) and the power supply network and the current variation between the bidirectional charger (3) and the power supply socket (6),
then, the bi-directional charger is controlled so that the electrical signals on both sides of the fast switching device (5) are synchronized,
in this case, determining a current set point based on the power consumed or supplied by the battery, the power supply network and the load,
-controlling the fast switching device (5) such that it switches from an off-state to an on-state, and
controlling the bi-directional charger such that it switches from voltage controlled inverter mode operation to current controlled inverter or current controlled rectifier mode operation by applying the current setpoint,
when the power supply system is connected to the power supply network and the connection state with the power supply network is changed,
determining a current set point based on the power consumed or supplied by the battery, the power supply network and the load,
-controlling switching to a voltage controlled inverter mode by applying the current setpoint, and
-controlling the fast switching device such that it switches from an on state to an off state.
6. The control method according to claim 5, wherein it is implicitly determined whether the power supply system is connected to a power supply network via information exchanged with the charging terminal through a data connection of the recharging plug (4), via measuring a voltage upstream of the fast switching device, or when the power supply system is connected to a standardized power outlet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2103051 | 2021-03-25 | ||
| FR2103051A FR3121080B1 (en) | 2021-03-25 | 2021-03-25 | Power supply system comprising a bidirectional charger and a battery, capable of powering an external load while being connected to a power supply network and method of controlling such a system |
| PCT/EP2022/056810 WO2022200144A1 (en) | 2021-03-25 | 2022-03-16 | Electrical power supply system comprising a bidirectional charger and a battery, capable of supplying an external charge while being connected to an electrical power supply network and method for controlling such a system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117062730A true CN117062730A (en) | 2023-11-14 |
Family
ID=76283894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280024680.3A Pending CN117062730A (en) | 2021-03-25 | 2022-03-16 | Power supply system comprising a bidirectional charger and a battery, capable of powering an external load when connected to a power supply network, and method for controlling such a system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4313660A1 (en) |
| CN (1) | CN117062730A (en) |
| FR (1) | FR3121080B1 (en) |
| WO (1) | WO2022200144A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259274A (en) * | 2009-04-28 | 2010-11-11 | Toyota Motor Corp | Charging pack for electric storage device |
| EP2823987B1 (en) * | 2012-03-07 | 2019-06-19 | Toyota Jidosha Kabushiki Kaisha | Electric-powered vehicle and method for controlling same |
| EP3996949A1 (en) * | 2019-07-11 | 2022-05-18 | Volvo Truck Corporation | A control unit for an electric power transmission system |
-
2021
- 2021-03-25 FR FR2103051A patent/FR3121080B1/en active Active
-
2022
- 2022-03-16 EP EP22715080.2A patent/EP4313660A1/en active Pending
- 2022-03-16 CN CN202280024680.3A patent/CN117062730A/en active Pending
- 2022-03-16 WO PCT/EP2022/056810 patent/WO2022200144A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP4313660A1 (en) | 2024-02-07 |
| WO2022200144A1 (en) | 2022-09-29 |
| FR3121080B1 (en) | 2023-04-14 |
| FR3121080A1 (en) | 2022-09-30 |
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