CN108616155B - Charging method and charging device - Google Patents
Charging method and charging device Download PDFInfo
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- CN108616155B CN108616155B CN201810449013.5A CN201810449013A CN108616155B CN 108616155 B CN108616155 B CN 108616155B CN 201810449013 A CN201810449013 A CN 201810449013A CN 108616155 B CN108616155 B CN 108616155B
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Abstract
The present disclosure provides a charging device and a charging method. The charging device includes: an input terminal for receiving an alternating current; the three charging units are used for respectively receiving the alternating current when the external alternating current is judged to be the three-phase alternating current, and selectively accessing the power conversion circuit according to the current magnitude to convert the alternating current when the external alternating current is judged to be the single-phase alternating current. The charging device provided by the disclosure can be compatible with three-phase charging and single-phase charging, and can meet the requirement of high-power charging during single-phase charging.
Description
Technical Field
The disclosure relates to the technical field of power supplies, in particular to a charging method and a charging device capable of adapting to single-phase charging and three-phase charging.
Background
The vehicle-mounted charger is an important part on the electric automobile, and the vehicle-mounted charger is conveniently charged, so that the popularization of the electric automobile is realized.
In the prior art, a vehicle-mounted charger of an electric vehicle usually can only accept single-phase alternating current or can only accept three-phase alternating current charging power, that is, the vehicle-mounted charger can be divided into a single-phase charger and a three-phase charger according to different input power modes at an alternating current side. If an electric automobile with a three-phase charger stops in the parking lot with only single-phase charging pile, the charging operation cannot be carried out. The existing method is to equip a single-phase portable charger for an electric automobile on the vehicle to solve the problem of emergency charging of a customer, but not only causes poor user experience, but also has potential safety hazards of power utilization, and increases the cost of the electric automobile.
In addition, the power level of a single-phase charger typically includes 3.3kw and 6.6kw, and the power level of a three-phase input charger is typically around 11 kw. With the continuous improvement of the cruising ability of the electric automobile in the future, the power level of the charger is increased, the traditional 3.3kw or 6.6kw power single-phase charger may not meet the requirements of customers, and the charger with the power level of 11kw or even higher will become the mainstream.
Therefore, a charging device and a charging method which are easy and convenient to operate and can meet the requirement of high-power charging during single-phase charging are needed.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a charging method and a charging device, which are used to overcome the technical disadvantage that the existing charging device can only accept a single-phase input power or a three-phase input power, and provide a solution for meeting the power requirement of single-phase charging.
According to a first aspect of embodiments of the present disclosure, there is provided a charging device including:
a charging device, comprising:
an input terminal including a first charging node, a second charging node, a third charging node, and a neutral node for receiving an input alternating current,
when the input alternating current is a three-phase alternating current, the input end receives corresponding single-phase alternating current in the input alternating current through the first charging node, the second charging node and the third charging node respectively, and when the input alternating current is a single-phase alternating current, the input end receives the input alternating current through the first charging node and the neutral line node;
a power module having a first input, a second input, a third input and a neutral input;
a first switch set having a first terminal and a second terminal, the first terminal being coupled to the second input terminal;
a second switch set having a first terminal and a second terminal, the first terminal being coupled to the third input terminal;
a control module, coupled to the first switch set, the second switch set and the input terminal, for controlling second terminals of the first switch set and the second switch set to be coupled to the second charging node and the third charging node, respectively, when the input ac power is a three-phase ac power; when the input alternating current is single-phase alternating current, the second end of the first switch group is controlled to be selectively coupled with or disconnected from the first charging node according to the rated output current of the input alternating current, and the second end of the second switch group is controlled to be selectively coupled with or disconnected from the first charging node.
In an exemplary embodiment of the present disclosure, further comprising:
and the judging module is coupled with the control module and used for judging the rated output current of the input alternating current when the input alternating current is single-phase alternating current and transmitting a judging result to the control module, so that the control module correspondingly controls the first switch group and the second switch group according to the judging result.
In an exemplary embodiment of the disclosure, when the input alternating current is a single-phase alternating current and a rated output current of the input alternating current is less than or equal to a first current preset value, the control module respectively controls the first switch group and the second switch group to be turned off.
In an exemplary embodiment of the disclosure, when the input alternating current is a single-phase alternating current and a rated output current of the input alternating current is greater than a first current preset value and less than or equal to a second current preset value, the control module controls the second terminal of the first switch group to be coupled to the first charging node and the second switch group to be disconnected.
In an exemplary embodiment of the present disclosure, the first current preset value is 16A.
In an exemplary embodiment of the disclosure, when the input alternating current is a single-phase alternating current and a rated output current of the input alternating current is greater than a second current preset value, the control module controls the second terminal of the first switch set and the second terminal of the second switch set to be coupled to the first charging node.
In an exemplary embodiment of the disclosure, any one of the first switch set and the second switch set includes a single-pole double-throw switch or a controllable switch tube.
In an exemplary embodiment of the present disclosure, the first charging node and the first input terminal are coupled through a third switch group.
In an exemplary embodiment of the present disclosure, a resistor connected in parallel with the third switch group is further included.
In an exemplary embodiment of the present disclosure, the neutral line node and the neutral line terminal are coupled through a fourth switch group.
In an exemplary embodiment of the present disclosure, the power module further includes a first charging unit, a second charging unit and a third charging unit, the first charging unit is coupled to the first input terminal and the neutral terminal, the second charging unit is coupled to the second input terminal and the neutral terminal, and the third charging unit is coupled to the third input terminal and the neutral terminal; the first charging unit, the second charging unit and the third charging unit respectively comprise a power factor correction circuit and a direct current/direct current converter.
In an exemplary embodiment of the present disclosure, output terminals of the first charging unit, the second charging unit, and the third charging unit are connected in parallel or in series.
In an exemplary embodiment of the present disclosure, the power output by the first charging unit is 3.3kW, the power output by the second charging unit is 3.3kW, and the power output by the third charging unit is 3.3 kW.
In an exemplary embodiment of the present disclosure, the control module and the power module are disposed in one physical structure.
A charging method is applied to a charging device, the charging device comprises an input end, a first charging node, a second charging node, a third charging node and a neutral line node, and the charging device is used for receiving input alternating current; a power module having a first input, a second input, a third input and a neutral input; a first switch set having a first terminal and a second terminal, the first terminal being coupled to the second input terminal; a second switch set having a first terminal and a second terminal, the first terminal being coupled to the third input terminal; the method comprises the following steps:
judging whether the charging mode is a three-phase charging mode or a single-phase charging mode;
controlling a second terminal of the first switch set and a second terminal of the second switch set of the charging device to be coupled with the second charging node and the third charging node, respectively, in a three-phase charging mode;
and when the single-phase charging mode is adopted, the second end of the first switch and the second end of the second switch of the charging device are controlled to be selectively coupled with or disconnected from the first charging node.
In an exemplary embodiment of the present disclosure, the controlling the second terminal of the first switch set and the second terminal of the second switch set of the charging device to be selectively coupled to or decoupled from the first charging node includes:
judging the magnitude of the charging current;
when the charging current is smaller than or equal to a first preset value, controlling the second end of the first switch group and the second end of the second switch group to be disconnected;
when the charging current is larger than a first preset value and smaller than or equal to a second preset value, controlling a second end of the first switch to be coupled with the first charging node, and disconnecting the second switch group;
and when the charging current is larger than a second preset value, controlling the second end of the first switch and the second end of the second switch to be coupled with the first charging node.
In an exemplary embodiment of the present disclosure, the first preset value is 16A, and the second preset value is 32A.
In an exemplary embodiment of the disclosure, any one of the first switch set and the second switch set includes a single-pole double-throw switch or a controllable switch tube.
In an exemplary embodiment of the present disclosure, the first charging node and the first input terminal are coupled through a third switch group.
In an exemplary embodiment of the present disclosure, the charging device further includes a parallel resistor of the third switch group, the power module further includes a bus capacitor, and before the determining that the charging mode is the three-phase charging mode or the single-phase charging mode, the method further includes:
and the first switch group, the second switch group and the third switch group are disconnected, the bus capacitor is precharged through the parallel resistor, the third switch group is closed when the voltage on the bus capacitor reaches a first preset voltage, and the charging mode is judged to be a three-phase charging mode or a single-phase charging mode after the voltage on the bus capacitor reaches a second preset voltage.
In an exemplary embodiment of the present disclosure, the neutral line node and the neutral line terminal are coupled through a fourth switch group.
According to the charging device and the charging method, the charging mode and the charging current are judged, the charging unit is connected into the current conversion circuit through the change-over switch according to the charging current grade when the charging mode is judged to be single-phase charging, compatibility of the three-phase charging mode and the single-phase charging mode is achieved on the premise that power utilization safety is guaranteed, cost is saved, and user experience is improved, and the requirement of the single-phase charging mode for high-power charging is met.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 schematically illustrates a schematic diagram of a charging device in an exemplary embodiment of the present disclosure.
Fig. 2 schematically illustrates a schematic diagram of another charging device in an exemplary embodiment of the present disclosure.
Fig. 3 schematically illustrates a schematic diagram of another charging device in an exemplary embodiment of the present disclosure.
Fig. 4 schematically illustrates a schematic diagram of a charging device according to still another exemplary embodiment of the present disclosure.
Fig. 5 schematically illustrates a schematic diagram of a charging device according to still another exemplary embodiment of the present disclosure.
Fig. 6 schematically illustrates a schematic diagram of a charging device according to still another exemplary embodiment of the present disclosure.
Fig. 7 schematically illustrates an implementation of PFC + DC/DC in an exemplary embodiment of the present disclosure.
Fig. 8 schematically shows another implementation of PFC + DC/DC in an exemplary embodiment of the present disclosure.
Fig. 9 schematically illustrates a flow chart of a charging method in an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Further, the drawings are merely schematic illustrations of the present disclosure, in which the same reference numerals denote the same or similar parts, and thus, a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The following detailed description of exemplary embodiments of the disclosure refers to the accompanying drawings.
Fig. 1 schematically illustrates a schematic diagram of a charging device in an exemplary embodiment of the present disclosure.
Referring to fig. 1, the charging device 100 may include:
the input terminal 1 includes a first charging node 11, a second charging node 12, a third charging node 13 and a neutral node 14, and is configured to receive an input ac power. The input ac power may be provided by a charging device, such as a charging post, which may not include a neutral wire.
The power module 2 may include a first input 21, a second input 22, a third input 23, and a neutral input 24.
The first switch set 31 has a first terminal coupled to the second input terminal 22 and a second terminal selectively coupled to or decoupled from the first charging node 11 and the second charging node 12.
The second switch set 32 has a first terminal coupled to the third input terminal 23 and a second terminal selectively coupled to or decoupled from the first charging node 11 and the third charging node 13.
The control module 4 is coupled to the first switch group 31, the second switch group 32 and the input end 1, and configured to determine whether the input ac power is a three-phase ac power or a single-phase ac power and control the first switch group and the second switch group.
When the input ac power is a three-phase ac power, the input terminal 1 receives a corresponding single-phase ac power from the input ac power through the first charging node 11, the second charging node 12, and the third charging node 13, respectively. The control module 4 controls the second terminals of the first switch set 32 and the second switch set 32 to be coupled to the second charging node 12 and the third charging node 13, respectively.
When the input ac power is single-phase ac power, the input terminal 1 receives the input ac power through the first charging node 11 and the neutral node 14. The control module 4 controls the second terminal of the first switch group 31 to be selectively coupled to or decoupled from the first charging node 11 according to the rated output current of the input alternating current, and the second terminal of the second switch group 32 to be selectively coupled to or decoupled from the first charging node 11.
Fig. 2 is a block diagram of one embodiment of the charging device 100.
Referring to fig. 2, in one embodiment, the power module 2 may include:
the first charging unit 211 is coupled to the first input terminal 21 and has a first middle line terminal 241 coupled to the middle line input terminal 24.
The second charging unit 221 is coupled to the second input terminal 22, and has a second center line terminal 242 coupled to the center line input terminal 24.
The third charging unit 231 is coupled to the third input terminal 23 and has a third middle line terminal 243 coupled to the middle line input terminal 24.
In an embodiment of the present disclosure, a fixed input interface may be provided when the first charging unit is charged in a single phase, and the other two charging units select whether to switch in or not through an additional auxiliary switch bridge arm.
When the input ac power is a three-phase ac power, the input terminal 1 receives a corresponding single-phase ac power from the input ac power through the first charging node 11, the second charging node 12, and the third charging node 13, respectively. At this time, the first charging unit 21 operates to convert the corresponding single-phase alternating current of the input alternating current, and the control unit 4 controls the second terminal of the first switch group 31 and the second terminal of the second switch group 32 to be coupled to the second charging node 12 and the third charging node 13, respectively, so that the second charging unit 22 and the third charging unit 23 convert the corresponding single-phase alternating current of the input alternating current, respectively. This mode is similar to the conventional three-phase charging mode and thus will not be described in detail.
When the input ac power is single-phase ac power, the input terminal 1 receives the input ac power through the first charging node 11 and the neutral node 14.
In one embodiment, when the input ac power is a single-phase ac power and the output terminals of the first charging unit 211, the second charging unit 221 and the third charging unit 231 are connected in parallel (as shown in fig. 2), the first charging unit 211 operates and converts the input ac power. At this time, the control module 4 controls the second terminal of the first switch set 31 to be selectively coupled to or decoupled from the first charging node 11 and the second terminal of the second switch set 32 to be selectively coupled to or decoupled from the first charging node 11 respectively according to the rated output current of the input alternating current, so that the second charging unit 221 and the third charging unit 231 are selectively operated to convert the input alternating current.
It is understood that, although the control unit 4 is drawn separately from the power unit 2 in the drawing of the present embodiment, in some other embodiments, the physical structure of the control unit 4 may also be disposed in the same physical structure as the power unit 2, such as a chip or a circuit module.
Fig. 3 schematically illustrates a schematic diagram of another charging device in an exemplary embodiment of the present disclosure.
Referring to fig. 3, in an exemplary embodiment of the present disclosure, further includes:
the judging module 5 is coupled to the control module 4, and configured to judge a rated output current of the input alternating current when the input alternating current is a single-phase alternating current, and transmit a judgment result to the control module 4, so that the control module 4 correspondingly controls the first switch group 31 and the second switch group 32 according to the judgment result.
In this embodiment, when the input ac is single-phase ac, one, two, or three charging units may be selected to be connected according to the current magnitude determined by the determining module 5, so as to expand the charging power.
In one embodiment, when the input ac power is a single-phase ac power and the rated output current of the input ac power is less than or equal to the first current preset value, the control unit 4 may control the first switch set 31 and the second switch set 32 to be turned off respectively, so that the first charging unit 211 converts the input ac power and the second charging unit 221 and the third charging unit 231 do not convert the input ac power.
When the rated output current of the input ac power is greater than the first preset current value and less than or equal to the second preset current value, the control unit 4 may respectively control the second terminals of the first switch set 31 to be coupled to the first charging node 11, and the second switch set 32 is turned off, so that the second charging unit 221 and the first charging unit 211 operate in parallel and convert the input ac power, and the third charging unit 231 does not convert the input ac power.
In one embodiment, when the input ac power is a single-phase ac power and the rated output current of the input ac power is greater than the second current preset value, the second charging unit 221 and the third charging unit 231 respectively control the second terminals of the first switch set 31 and the second switch set 32 to be respectively coupled to the first charging node 11, so that the second charging unit 221, the third charging unit 231 and the first charging unit 211 operate in parallel and convert the input ac power.
In one embodiment, the first current preset value is 16A and the second current preset value is 32A. The power output by the first charging unit 21 is 3.3kW, the power output by the second charging unit 22 is 3.3kW, and the power output by the third charging unit 23 is 3.3 kW.
That is, when the external charging current is determined not to be greater than 16A, only the first charging unit 11 may be selected to be connected, so as to realize charging with the output power of 3.3kW at the maximum.
When the external charging current is judged to be larger than 16A and not smaller than 32A, the first charging unit 21 and the other charging unit can be selected to be connected, and charging with the output power of 7kW at most is achieved. It is understood that, although the second charging unit 221 is connected in the embodiment as an example, in some other embodiments, the third charging unit 231 may be connected in and the second charging unit 221 may be disconnected, so that the same effect can be achieved. By selecting the charging unit to be switched in, a backup scheme can be provided for single-phase charging.
When the external charging current is judged to be larger than 32A, all three charging units can be selected to be connected into the current conversion circuit. At the moment, the charging with the output power of 11kW at most can be realized, and the requirement of a single-phase charging mode for high-power charging is met to a certain extent.
In the embodiment shown in fig. 3, a third switch set 33 and a fourth switch set 34 are further included.
The control module 4 controls the third switch group 33 to be turned on and off, so that the connected charging unit can be flexibly set when the input alternating current is single-phase alternating current. For example, when the rated charging current is less than or equal to the first current preset value, one of the three charging units may be optionally connected to the current conversion circuit; when the rated charging unit is larger than the first current preset value and smaller than or equal to the second current preset value, two of the three charging units can be optionally connected with the current conversion circuit.
In addition, the third switch group 33 can be used for flexibly selecting the other two charging units when the input alternating current is single-phase alternating current and the first charging unit fails, so that the failure of the first charging unit is avoided, the failure of the whole charging device is avoided, and the reliability of the charging device is improved.
In the embodiment shown in fig. 3, each switch group is a single-pole double-throw switch, and in some other embodiments, any one of the first switch group 31, the second switch group 32, the third switch group 33, and the fourth switch group 34 includes a single-pole double-throw switch or a controllable switch tube. The switch type can be set by a person skilled in the art according to actual conditions, and the switch type is within the protection scope of the present disclosure as long as the access scheme as described above can be implemented.
Fig. 4 schematically illustrates a schematic diagram of another charging device in an exemplary embodiment of the present disclosure.
Referring to fig. 4, the controllable switch tubes of the first switch set and the second switch set are taken as an example. If the control module 4 determines that the external charging power supply is single-phase alternating current, the control unit 4 may receive the current determination signal output by the determination module 5 so as to determine the number of the charging units connected according to the maximum power supply current value of the external current. If the maximum supply current of the external alternating current is 16A, only the first charging unit 211 needs to work; if the maximum supply current of the external alternating current is 32A, the auxiliary switch S1 of the second charging unit 221 may be controlled to be closed and S2 may be controlled to be opened, so that the first charging unit 211 and the second charging unit 221 operate in parallel to output 7 kw; similarly, if the maximum supply current of the external ac is 48A or higher, the auxiliary switch S1 of the second charging unit 221 may be controlled to be turned on and turned off as S2, and the auxiliary switch S3 of the third charging unit 231 may be controlled to be turned on and turned off as S4, so that the three modules simultaneously operate in parallel to output a full power of 11 KW.
In some embodiments, the auxiliary switches S1 and S2 of the second charging unit 221 and the auxiliary switches S3 and S4 of the third charging unit 231 are controllable switching tubes, which may be relays, for example.
The auxiliary switches S1, S2, S3 and S4 are arranged to realize a single-phase/three-phase compatible charger, so that the control mode is simple and easy to realize.
In one embodiment, when the input ac power is a single-phase ac power and the output terminals of the first charging unit 211, the second charging unit 221 and the third charging unit 231 are connected in series, the control unit 4 controls the second terminals of the first switch set 31 and the second switch set 32 to be coupled to the first charging node 11 respectively, and the first charging unit 211, the second charging unit 221 and the third charging unit 231 operate together to convert the input ac power.
When the charging units are connected in series, the three charging units can be directly connected into the power conversion circuit in sequence without judging the current, and the charging device with the output power of 11kW at most is provided.
In an exemplary embodiment of the present disclosure, the first charging unit 211, the second charging unit 221, and the third charging unit 231 in the power module 2 respectively include a power factor correction circuit PFC and a direct current/direct current converter DC/DC.
Fig. 5 schematically illustrates a schematic diagram of a charging device according to still another exemplary embodiment of the present disclosure.
Referring to fig. 5, in the embodiment shown in fig. 5, the control unit 4 and the power unit 2 are in the same physical structure, and can control the switches 31, 32, 33, 34. In addition, the control unit 4 can control the operation of the power module by controlling the on/off of the plurality of switching tubes 25.
Fig. 6 schematically shows an implementation of PFC + DC/DC in an exemplary embodiment of the present disclosure. Fig. 7 schematically illustrates another implementation of PFC + DC/DC in an exemplary embodiment of the present disclosure.
The implementation manner of PFC + DC/DC in fig. 6 and fig. 7 is only an example, and in other embodiments of the disclosure, the implementation manner of PFC + DC/DC may also be other manners, which is not particularly limited by the disclosure.
Fig. 8 schematically illustrates a schematic diagram of a charging device according to still another exemplary embodiment of the present disclosure.
Referring to fig. 8, in one embodiment, the third switch group 33 may further have a parallel resistance R.
The power module still includes bus electric capacity C, still includes before judging that the mode of charging is three-phase charging mode or single-phase charging mode:
the first switch group 31, the second switch group 32 and the third switch group 33 are turned off, so that the single PFC module in the power module precharges the bus capacitor C in the power module through the parallel resistor R. And when the voltage of the bus capacitor reaches a first preset voltage, the third switch group 33 is closed, and when the voltage of the bus capacitor reaches a second preset voltage, the charging mode is judged to be a three-phase charging mode or a single-phase charging mode and correspondingly operated.
The third switch unit is pre-charged by arranging the parallel resistor, so that the technical effect of limiting surge current by arranging too much resistor can be avoided.
Fig. 9 schematically illustrates a flow chart of a charging method in an exemplary embodiment of the disclosure.
Referring to fig. 9, the charging method may include:
step S1, judging whether the charging mode is a three-phase charging mode or a single-phase charging mode;
step S2, in the three-phase charging mode, controlling a first charging unit, a second charging unit, and a third charging unit of the charging device to be coupled to a first charging node, a second charging node, and a third charging node, respectively;
step S3, controlling the second charging unit and the third charging unit of the charging device to be selectively coupled to or decoupled from the first charging node in a single-phase charging mode.
Wherein, the step S3 may include:
step S31, judging the magnitude of the charging current;
step S32, when the charging current is less than or equal to a first preset value, controlling the second charging unit and the third charging unit to be disconnected;
step S33, when the charging current is greater than a first preset value and less than or equal to a second preset value, controlling the second charging unit to couple to the first charging node, and disconnecting the third charging unit;
in step S34, when the charging current is greater than a second preset value, the second charging unit and the third charging unit are controlled to be coupled to the first charging node.
In an exemplary embodiment of the present disclosure, the first preset value is 16A, and the second preset value is 32A.
In an exemplary embodiment of the present disclosure, the output power of the first charging unit, the second charging unit, and the third charging unit is 3.3 kW.
According to the charging method, the charging mode and the charging current are judged, the charging unit is connected into the current conversion circuit through the change-over switch according to the charging current grade when the charging mode is judged to be single-phase charging, compatibility of the three-phase charging mode and the single-phase charging mode is achieved on the premise that power utilization safety is guaranteed, cost is saved, and user experience is improved, and the requirement of the single-phase charging mode for high-power charging is met.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (16)
1. A charging device, comprising:
an input terminal including a first charging node, a second charging node, a third charging node, and a neutral node for receiving an input alternating current,
when the input alternating current is a three-phase alternating current, the input end receives corresponding single-phase alternating current in the input alternating current through the first charging node, the second charging node and the third charging node respectively, and when the input alternating current is a single-phase alternating current, the input end receives the input alternating current through the first charging node and the neutral line node;
a power module having a first input, a second input, a third input and a neutral input;
a first switch set having a first terminal and a second terminal, the first terminal being coupled to the second input terminal;
a second switch set having a first terminal and a second terminal, the first terminal being coupled to the third input terminal;
a control module, coupled to the first switch set, the second switch set and the input terminal, for controlling second terminals of the first switch set and the second switch set to be coupled to the second charging node and the third charging node, respectively, when the input ac power is a three-phase ac power; when the input alternating current is single-phase alternating current, the second end of the first switch group is controlled to be selectively coupled with or disconnected from the first charging node according to the rated output current of the input alternating current, and the second end of the second switch group is selectively coupled with or disconnected from the first charging node;
the judging module is coupled to the control module and used for judging the rated output current of the input alternating current when the input alternating current is single-phase alternating current and transmitting a judging result to the control module, so that the control module correspondingly controls the first switch group and the second switch group according to the judging result; when the input alternating current is single-phase alternating current and the rated output current of the input alternating current is less than or equal to a first current preset value, the control module respectively controls the first switch group and the second switch group to be switched off; when the input alternating current is single-phase alternating current and the rated output current of the input alternating current is greater than a first current preset value and less than or equal to a second current preset value, the control module controls the second end of the first switch group to be coupled with the first charging node, and the second switch group is disconnected; when the input alternating current is single-phase alternating current and the rated output current of the input alternating current is larger than a second current preset value, the control module controls the second end of the first switch group and the second end of the second switch group to be coupled with the first charging node.
2. A charging arrangement as claimed in claim 1, in which the first current preset value is 16A.
3. The charging device of claim 1, wherein any one of the first switch set and the second switch set comprises a single pole double throw switch or a controllable switch tube.
4. The charging device of claim 1, wherein the first charging node is coupled to the first input through a third set of switches.
5. The charging device of claim 4, further comprising a resistor in parallel with the third switch set.
6. The charging device of claim 1, wherein the neutral node and the neutral input are coupled through a fourth switch set.
7. The charging device of claim 1, wherein the power module further comprises a first charging unit, a second charging unit, and a third charging unit, the first charging unit coupled to the first input and a neutral input, the second charging unit coupled to the second input and a neutral input, and the third charging unit coupled to the third input and a neutral input; the first charging unit, the second charging unit and the third charging unit respectively comprise a power factor correction circuit and a direct current/direct current converter.
8. The charging device of claim 7, wherein the output terminals of the first charging unit, the second charging unit and the third charging unit are connected in parallel or in series.
9. The charging device according to claim 7, wherein the power output by the first charging unit is 3.3kW, the power output by the second charging unit is 3.3kW, and the power output by the third charging unit is 3.3 kW.
10. The charging apparatus of claim 1, wherein the control module and the power module are disposed in a single physical structure.
11. A charging method is applied to a charging device, the charging device comprises an input end, a first charging node, a second charging node, a third charging node and a neutral line node, and the charging device is used for receiving input alternating current; a power module having a first input, a second input, a third input and a neutral input; a first switch set having a first terminal and a second terminal, the first terminal being coupled to the second input terminal; a second switch set having a first terminal and a second terminal, the first terminal being coupled to the third input terminal; it is characterized by comprising:
judging whether the charging mode is a three-phase charging mode or a single-phase charging mode;
controlling a second terminal of the first switch set and a second terminal of the second switch set of the charging device to be coupled with the second charging node and the third charging node, respectively, in a three-phase charging mode;
controlling a second terminal of the first switch set and a second terminal of the second switch set of the charging device to be selectively coupled with or disconnected from the first charging node in a single-phase charging mode;
wherein the controlling of the second terminal of the first switch set and the second terminal of the second switch set of the charging device to be selectively coupled to or decoupled from the first charging node comprises: judging the rated output current of the input alternating current; when the rated output current of the input alternating current is smaller than or equal to a first preset value, controlling the second end of the first switch group and the second end of the second switch group to be disconnected; when the rated output current of the input alternating current is larger than a first preset value and smaller than or equal to a second preset value, controlling a second end of the first switch group to be coupled with the first charging node, and disconnecting the second switch group; and when the rated output current of the input alternating current is larger than a second preset value, controlling the second end of the first switch group and the second end of the second switch group to be coupled with the first charging node.
12. The charging method according to claim 11, wherein the first preset value is 16A, and the second preset value is 32A.
13. The charging method of claim 11, wherein any one of the first switch set and the second switch set comprises a single pole double throw switch or a controllable switch tube.
14. The charging method of claim 11, wherein the first charging node is coupled to the first input terminal through a third switch set.
15. The charging method according to claim 14, wherein the charging device further comprises a parallel resistor of the third switch set, the power module further comprises a bus capacitor, and before the determining whether the charging mode is a three-phase charging mode or a single-phase charging mode, the method further comprises:
and the first switch group, the second switch group and the third switch group are disconnected, the bus capacitor is precharged through the parallel resistor, the third switch group is closed when the voltage on the bus capacitor reaches a first preset voltage, and the charging mode is judged to be a three-phase charging mode or a single-phase charging mode after the voltage on the bus capacitor reaches a second preset voltage.
16. The charging method of claim 11, wherein the neutral node and the neutral input are coupled through a fourth switch set.
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| WO2024068114A1 (en) * | 2022-09-30 | 2024-04-04 | Robert Bosch Gmbh | Charging device, and method for operating the charging device |
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| CN109889077B (en) * | 2019-04-08 | 2021-01-26 | 台达电子企业管理（上海）有限公司 | Single-phase and three-phase compatible AC/DC circuit and charging and discharging device |
| CN113459859B (en) * | 2021-08-23 | 2023-10-31 | 阳光电源股份有限公司 | New energy charging system, alternating-current charging pile and charging method thereof |
| CN117134471B (en) * | 2022-03-24 | 2024-04-12 | 华为电动技术有限公司 | Charger, vehicle, charging method and medium |
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