CN113541238A - Charger and charging method thereof - Google Patents

Charger and charging method thereof Download PDF

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Publication number
CN113541238A
CN113541238A CN202110673181.4A CN202110673181A CN113541238A CN 113541238 A CN113541238 A CN 113541238A CN 202110673181 A CN202110673181 A CN 202110673181A CN 113541238 A CN113541238 A CN 113541238A
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CN
China
Prior art keywords
charging module
charging
switch
module
controlling
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Withdrawn
Application number
CN202110673181.4A
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Chinese (zh)
Inventor
杨新新
叶剑
李征龙
王伟
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Hangzhou Lead Lithium Zhixing Technology Co ltd
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Hangzhou Lead Lithium Zhixing Technology Co ltd
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Priority to CN202110673181.4A priority Critical patent/CN113541238A/en
Publication of CN113541238A publication Critical patent/CN113541238A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • 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
    • Y02E60/10—Energy storage using 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
    • Y02T10/70—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
    • 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
    • Y02T90/12—Electric charging stations
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to a charger, which comprises a first charging module, a first charging port, a second charging port, a switch matrix circuit and a control unit, wherein the switch matrix circuit comprises a first charging module first switch for connecting the first charging module with the first charging port and a first charging module second switch for connecting the first charging module with the second charging port, the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch, when the first charging module needs to be switched to charge the second charging port for charging the first charging port, the control unit is used for controlling the first charging module first switch to be switched off and controlling the first charging module to be switched off, and when the current value detected by a current detection circuit is zero or the difference value between the two ends detected by a voltage detection circuit is zero, and controlling the first charging module to be electrified and controlling a second switch of the first charging module to be closed. The charger and the method thereof can realize accurate and safe charging switching of the charging module among a plurality of charging ports.

Description

Charger and charging method thereof
(I) technical field
The invention relates to the field of charging equipment.
(II) background of the invention
At present, when a plurality of electric vehicles are charged by a charger, generally, a charging module corresponds to one electric vehicle, each charging module is independently charged, in order to improve charging efficiency, the charging module can be used for switching different charging ports for charging, however, when the charging ports are switched for charging, the charging module needs to be powered off and the relay switch needs to be disconnected, after the relay switch is disconnected and the charging module is powered off, because of the influence of components such as capacitors on a charging circuit, after the relay switch is disconnected and the charging module is powered off, the current on the relay switch connected with the charging circuit can delay for a period of time to be disappeared, the charging port can not be switched due to premature switching, charging is unreasonable, and even potential safety hazards appear.
Disclosure of the invention
In order to solve the above technical problems, the present invention provides a charger, comprising a first charging module, a first charging port and a second charging port, a switch matrix circuit and a control unit, wherein the switch matrix circuit comprises a first charging module first switch for connecting the first charging module and the first charging port, a first charging module second switch for connecting the first charging module and the second charging port, and the control unit is configured to control the on/off of the first charging module first switch and the on/off of the first charging module second switch, and further comprises a current detection circuit for detecting a current flowing through the first charging module first switch or a voltage detection circuit for detecting a voltage across the first charging module first switch, when the first charging module is required to switch the charging of the first charging port to the charging of the second charging port, the control unit is used for controlling the first switch of the first charging module to be switched off, controlling the first charging module to be switched off, and controlling the first charging module to be switched on and controlling the second switch of the first charging module to be switched on when the current value detected by the current detection circuit is zero or the difference value of the voltages at the two ends detected by the voltage detection circuit is zero.
The switch matrix circuit further comprises a second charging module, a second charging module first switch for connecting the second charging module with the first charging port, and a second charging module second switch for connecting the second charging module with the second charging port, wherein the control unit is used for controlling the on/off of the second charging module first switch and the on/off of the second charging module second switch, and the switch matrix circuit is characterized by further comprising a current detection circuit for detecting the current flowing through the second charging module first switch or a voltage detection circuit for detecting the voltage at two ends of the second charging module first switch, when the second charging module needs to be switched to charge the second charging port, the control unit is used for controlling the second charging module first switch to be switched off and controlling the second charging module to be switched off, and when the current value detected by the current detection circuit is zero or the difference value of the voltages at the two ends detected by the voltage detection circuit is zero, controlling the second charging module to be electrified and controlling the second switch of the second charging module to be closed.
Further, the voltage detection circuit comprises a voltage detection circuit for detecting the voltage at the output end of the charging module and a voltage detection circuit for detecting the voltage at the input end of the charging port.
The invention also protects a charger, which comprises a first charging module, a first charging port, a second charging port, a switch matrix circuit and a control unit, wherein the switch matrix circuit comprises a first charging module first switch for connecting the first charging module with the first charging port, and a first charging module second switch for connecting the first charging module with the second charging port, and the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch And controlling the first charging module to be powered on and controlling the second switch of the first charging module to be closed by the delay time on the switch.
The switch matrix circuit further comprises a second charging module, the switch matrix circuit further comprises a second charging module first switch for connecting the second charging module with the first charging port, and a second charging module second switch for connecting the second charging module with the second charging port, and the control unit is used for controlling the on-off of the second charging module first switch and the on-off of the second charging module second switch, and is characterized in that when the second charging module needs to switch the charging of the first charging port to the charging of the second charging port, the control unit is used for controlling the off of the second charging module first switch, controlling the power-off of the second charging module, controlling the power-on of the second charging module in a delayed manner, wherein the delayed time is longer than the time delayed on the second charging module first switch by the current when the second charging module is powered off, and controlling the second charging module to be electrified and controlling a second switch of the second charging module to be closed.
Further, the control unit comprises a switch control unit and a charging module control unit, the switch control unit is used for controlling the on and off of the charging module switch, and the charging module control unit is used for controlling the on and off of the charging module.
Further, the charging module control unit controls the first charging module first switch and the first charging module second switch by controlling the switch control unit.
The invention also protects a charging method of a charger, the charger comprises a first charging module, a first charging port and a second charging port, a switch matrix circuit and a control unit, the switch matrix circuit comprises a first charging module first switch for connecting the first charging module and the first charging port, a first charging module second switch for connecting the first charging module and the second charging port, the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch, the charger also comprises a current detection circuit for detecting the current of the first charging module first switch or a voltage detection circuit for detecting the voltage of the first charging module first switch, and the charger is characterized by comprising the following steps, when the first charging module needs to be switched to charge the first charging port to the second charging port, and controlling the first switch of the first charging module to be switched off, controlling the first charging module to be switched off, and controlling the first charging module to be switched on and controlling the second switch of the first charging module to be switched on when the current value detected by the current detection circuit is zero or the voltage difference value between the two ends detected by the voltage detection circuit is zero.
The switch matrix circuit further comprises a second charging module, a second charging module first switch for connecting the second charging module with the first charging port, a second charging module second switch for connecting the second charging module with the second charging port, and a control unit for controlling the on/off of the second charging module first switch and the on/off of the second charging module second switch, and further comprises a current detection circuit for detecting the current of the second charging module first switch or a voltage detection circuit for detecting the voltage of the second charging module first switch, and is characterized by further comprising the following steps of controlling the second charging module first switch to be switched off and controlling the second charging module to be switched off when the second charging module is required to charge the first charging port to charge the second charging port, and when the current value detected by the current detection circuit is zero or the difference value of the voltages at the two ends detected by the voltage detection circuit is zero, controlling the second charging module to be electrified and controlling the second switch of the second charging module to be closed.
The invention also provides a charging method of a charger, the charger comprises a first charging module, a first charging port and a second charging port, a switch matrix circuit and a control unit, the switch matrix circuit comprises a first charging module first switch for connecting the first charging module and the first charging port, a first charging module second switch for connecting the first charging module and the second charging port, and the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch, and is characterized by comprising the following steps of controlling the first charging module first switch to be switched off, controlling the first charging module to be powered off and controlling the first charging module to be powered on in a delayed manner when the first charging module needs to be switched to charge the first charging port to the second charging port, the delayed time is longer than the time of the current delay on the first switch of the first charging module when the first charging module is powered off, the first charging module is controlled to be powered on, and the second switch of the first charging module is controlled to be closed.
The switch matrix circuit further comprises a second charging module, a second charging module first switch for connecting the second charging module with the first charging port, a second charging module second switch for connecting the second charging module with the second charging port, and a control unit for controlling the on/off of the second charging module first switch and the on/off of the second charging module second switch, and further comprises a current detection circuit for detecting the current of the second charging module first switch or a voltage detection circuit for detecting the voltage of the second charging module first switch, and is characterized by further comprising the following steps of controlling the second charging module first switch to be switched off and controlling the second charging module to be switched off when the second charging module is required to charge the first charging port to charge the second charging port, and controlling the second charging module to be electrified in a delayed mode, wherein the delayed time is longer than the time delayed by the current on the first switch of the second charging module when the second charging module is powered off, and controlling the second charging module to be electrified and the second switch of the second charging module to be closed.
Further, the control unit comprises a switch control unit and a charging module control unit, the switch control unit is used for controlling the on and off of the charging module switch, and the charging module control unit is used for controlling the on and off of the charging module.
Further, the charging module control unit controls the first charging module first switch and the first charging module second switch by controlling the switch control unit.
Furthermore, after the first switch of the first charging module is switched off, the first charging module is controlled to be powered off, and after the first charging module is controlled to be powered on, the second switch of the first charging module is controlled to be switched on.
The charger and the method thereof can realize accurate and safe charging switching of the charging module among a plurality of charging ports.
(IV) description of the drawings
FIG. 1 is a block diagram of the charging circuit of the charger of the present invention;
fig. 2 is a partial circuit diagram of the switch matrix circuit of the charger of the present invention.
(V) detailed description of the preferred embodiments
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
as shown in fig. 1, the charging pile 100 of the present invention includes a switch matrix circuit 130 and a plurality of charging modules 110, the plurality of charging modules 110 are electrically connected to the switch matrix circuit 130, the switch matrix circuit 130 includes a plurality of charging pile charging ports, the switch control unit 120 is electrically connected to the switch matrix circuit 130, each charging module may be equipped with a charging module control unit, each charging module is connected to the commercial power through electronic components such as capacitors, each charging module may also share one charging module control unit, and the switch control unit 120 and the charging module control unit may also share one control unit. The switch matrix circuit 130 is configured to connect to one or more devices to be charged through a charging port of the charging pile, the devices to be charged may be batteries of an electric vehicle, the charging module 110 is configured to supply power to the devices to be charged through the switch matrix circuit 130, and the switch control unit 120 is configured to control a working state of the switch matrix circuit 130, so as to adjust a charging mode of the charging pile 100. It should be noted that, the number of the charging modules 110 provided in the present application may be set according to actual field requirements and the whole charging system, and the greater the number of the charging modules 110, the greater the power that can be supplied to the switch matrix circuit 130, so that the power supplied to the device to be charged by the switch matrix circuit 130 is greater or the more devices to be charged can be simultaneously and rapidly charged. The number of the output ports may also be set according to an actual working condition, and the number of the output ports may be equal to or different from the number of the charging modules 110, for example, the number of the charging modules 110 is 4, and the number of the output ports is 6. Meanwhile, in the working state of the switch matrix circuit 130, after the charging module passes the energy through the switch matrix circuit 130, the control unit controls the switch matrix circuit 130 to output the energy to different charging ports of the charging pile or to a certain charging port of the charging pile.
In the charging mode of the present invention, the number of the charging modules 110 is 4, and the charging ports of the charging pile are 6, and the charging ports of the charging pile are respectively the first charging port 1, the second charging port 2, the third charging port 3, the fourth charging port 4, the fifth charging port 5 and the sixth charging port 6 are respectively used for receiving the charging equipment 1, the charging equipment 2, the charging equipment 3, the charging equipment 4, the charging equipment 5 and the charging equipment 6, and the following description will take an example that the charging equipment to be an electric vehicle is a battery equipped with four 20AH as an example.
The power of the charging module 1, the charging module 2, the charging module 3 and the charging module 4 is 600W respectively.
As shown in fig. 2, the first charging module 1 of the charging pile is connected to the first charging port 1 and the second charging port 2 through relay switches K11 and K12, i.e., a first charging module first switch and a first charging module second switch, respectively, K11 and K12; the second charging module 2 is connected with the first charging port 1 and the second charging port 2 through relay switches K21 and K22, namely, a first switch of the second charging module and a second switch of the second electric module; the third charging module 3 is connected to the first charging port 1 and the second charging port 2 through relay switches K31 and K32, respectively, and the fourth charging module 4 is connected to the first charging port 1 and the second charging port 2 through relay switches K41 and K42, respectively, and similarly, each charging module may be connected to other charging ports 3, 4, 5, and 6 in the same manner by adding a relay switch, respectively, and for clarity, not shown in the drawings, so that the corresponding charging module may be connected to the corresponding charging port as needed.
In the first embodiment of the present invention, the charger of the present invention further includes a current detection circuit or a voltage detection circuit, the current detection circuit detects a current flowing through each relay switch of each charging module, and the voltage detection circuit detects a voltage or a voltage difference across each relay switch of each charging module, which is not shown in the figure. When the first charging port 1 has a newly connected electric vehicle, it is determined that other ports are not charged, the control unit controls the relay switch K11 to be switched on, and all other relay switches are switched off, so that the first charging module 1 charges the electric vehicle, when the second charging port 2 has a new electric vehicle connected, if the charging module 1 needs to be switched from charging the charging port 1 to charging the charging port 2 at the moment, the switch control unit controls the first charging module first switch, i.e. the relay switch K11, to be switched off, the charging module control unit controls the first charging module 1 to be powered off, and when the current value of the relay switch K11 detected by the current detection circuit is zero or the voltage difference value between the two ends of the relay switch K11 detected by the voltage detection circuit is zero, i.e. the current value of the switched-off relay switch K11 and the voltage difference value between the two ends are zero, the charging module control unit controls the first charging module 1 to be powered on again, and the switch control unit controls the second switch of the first charging module, namely the relay switch K12 to be closed, so that the first charging module 1 can be switched from charging the first charging port 1 to charging the second charging port 2. When other charging modules are charging different charging ports and need to be switched, the same manner is used, for example, in this embodiment, when a new electric vehicle is connected to the first charging port, if the first charging module 1 and the second charging module 2 respectively charge the electric vehicle at the first charging port through the first switch K11 of the first charging module 1 and the first switch K21 of the second charging module 2, and when a new electric vehicle is connected to the second charging port 2, if the charging module 1 and the charging module 2 need to be switched from charging the first charging port 1 to charging the second charging port 2, similarly, when the switch control unit controls the first switch of the first charging module, namely the relay switch K11, and controls the first switch of the second charging module, namely the relay switch K21, to be switched off, the charging module control unit controls the first charging module 1 and the second charging module 2 to be powered off, when the current value of the first charging module first switch detected by the current detection circuit detecting the current of the first switch K11 of the first charging module 1 is zero or the voltage difference value of the two ends of the first charging module first switch detected by the voltage detection circuit detecting the voltage of the two ends of the first switch K11 of the first charging module 1 is zero, and the current value of the second charging module first switch detected by the current detection circuit detecting the current of the first switch K21 of the second charging module 2 is zero or the voltage difference value of the two ends of the second charging module first switch detected by the voltage detection circuit detecting the voltage of the two ends of the first switch K21 of the second charging module 2 is zero, that is, the current value of the opened relay switch K11 is zero or the voltage difference value of the two ends of the opened relay switch K11 is zero and the current value of the opened relay switch K21 is zero or the voltage difference value of the two ends of the opened relay switch K21 is zero, the first module of charging and the second module of charging circular telegram are controlled again to the module control unit that charges, and the switch control unit control first module second switch of charging is relay switch K12 promptly and the second module second switch of charging is relay switch K22 closure promptly to can realize that first charging circuit 1 and second charging circuit 2 follow and charge to first charging port 1 and switch to charging port 2 of charging the second.
In the second embodiment of the present invention, in this embodiment, without using a current detection circuit or a voltage detection circuit, when the first charging port 1 has a newly connected electric vehicle, it is determined that the other ports are not charged, the control unit controls the relay switch K11 to be turned on, and all other relay switches are turned off, so that the first charging module 1 charges the electric vehicle, when the second charging port 2 has a new electric vehicle connected, if it is necessary to switch the charging module 1 from charging the charging port 1 to charging the charging port 2, at this time, the switch control unit controls the first charging module first switch, i.e., the relay switch K11, to be turned off, the charging module control unit controls the first charging module 1 to be powered off, and then the charging module control unit controls the first charging module 1 to be powered on again, and the time delay is longer than the time when the first charging module is powered off, the current is delayed on the first charging module first switch, the switch control unit controls the second switch of the first charging module, namely the relay switch K12, to be closed, so that the first charging module 1 can be switched from charging the first charging port 1 to charging the second charging port 2. When other charging modules are charging different charging ports and need to be switched, the same manner is used, for example, in this embodiment, when a new electric vehicle is connected to the first charging port, if the first charging module 1 and the second charging module 2 respectively charge the electric vehicle at the first charging port through the first switch K11 of the first charging module 1 and the first switch K21 of the second charging module 2, and when a new electric vehicle is connected to the second charging port 2, if the charging module 1 and the charging module 2 need to be switched from charging the first charging port 1 to charging the second charging port 2, similarly, when the switch control unit controls the first switch of the first charging module, namely the relay switch K11, and controls the first switch of the second charging module, namely the relay switch K21, to be switched off, the charging module control unit controls the first charging module 1 and the second charging module 2 to be powered off, the charging module control unit controls the first charging module 1 to be electrified in a delayed mode, the charging module control unit controls the second charging module 2 to be electrified in a delayed mode, the time of delaying the electrifying of the first charging module 1 is longer than the time of delaying the current on a first switch of the first charging module when the first charging module is powered off, the time of delaying the electrifying of the second charging module 2 is longer than the time of delaying the current on a first switch of the second charging module when the second charging module is powered off, the switch control unit controls a second switch of the first charging module, namely a relay switch K12 to be closed, and controls a second switch of the second charging module, namely a relay switch K22 to be closed, so that the first charging circuit 1 and the second charging circuit 2 can be switched to charge the second charging port 2 from charging the first charging port 1 together; the time of the time delay of the electrification of the charging module refers to the time difference between the electrification of the charging module after the electrification of the charging module.
According to different charging control requirements, in the charging switching process of different charging ports, the same charging module detects the current of a disconnected relay switch or the voltage difference of two ends of the disconnected relay switch between the charging module and the charging port or the delayed electrification after the power failure of the charging module, so that the accuracy and the safety of the charging module in the charging switching process of different charging ports are ensured.
The charging method of the first embodiment of the charger comprises the following steps that a charging module control unit controls a first charging module to be electrified, and a switch control unit controls a first switch of the first charging module to be closed to charge a first charging port; the switch control unit controls the first switch of the first charging module to be disconnected, the charging module control unit controls the first charging module to be powered off, and when the current value of the disconnected relay switch is zero or the voltage difference value of the two ends of the disconnected relay switch is zero, namely the current value of the first switch of the first charging module is zero or the voltage difference value of the two ends of the first switch of the first charging module is zero, the charging module control unit controls the first charging module to be powered on, and the switch control unit controls the second switch of the first charging module to be switched on. When other charging modules are charging different charging ports and need to be switched, the method is the same and is not described in detail.
The charging method of the second embodiment of the charger of the invention comprises the following steps that the charging module control unit controls the first charging module to be electrified, and the switch control unit controls the first switch of the first charging module to be closed to charge the first charging port; the switch control unit controls the first switch of the first charging module to be switched off, the charging module control unit controls the first charging module to be switched on in a delayed mode, the delayed time is longer than the time of current delay on the first switch of the first charging module when the first charging module is switched off, and the switch control unit controls the second switch of the first charging module to be switched on. When other charging modules are charging different charging ports and need to be switched, the method is the same and is not described in detail.
The voltage detection circuit of the invention can comprise a voltage detection circuit for detecting the voltage at the output end of the charging module and a voltage detection circuit for detecting the voltage at the input end of the charging port, and can also be a voltage detection circuit for directly detecting the voltage difference between two ends of each relay switch of the charging module.
The switch control unit for controlling the relay switch and the charging module control unit for controlling the charging module of the invention can be respectively two control units for independently controlling the relay switch and the charging module, or the two control units can be designed as a master-slave control unit, for example, the switch control unit controls the relay switch by receiving the instruction of the charging module control unit, or the charging module unit controls the charging module by receiving the instruction of the switch control unit, of course, the control functions of the two control units can also be realized by one control unit.
When the charger is charged and switched, the relay switch is preferably controlled to be switched off firstly, then the corresponding charging module is controlled to be switched off, then the charging module is controlled to be switched on, and then the corresponding relay switch is controlled to be switched on. Thus, the charging safety can be ensured as much as possible. Such as: the first switch of the first charging module is controlled to be switched off, and when the current value detected by the current detection circuit is zero or the voltage difference value between the two ends detected by the voltage detection circuit is zero, the first charging module is controlled to be switched on, and then the second switch of the first charging module is controlled to be switched on.
In order to avoid reverse charging or avoid a charging loop formed between a plurality of rechargeable batteries when the rechargeable batteries are connected to a charging module for charging at the same time, the invention further comprises a step of judging the voltage difference between two ends of a relay switch to be closed of a switch matrix circuit before the relay switch of the switch matrix circuit is controlled to be closed, as in the first embodiment, when a first charging port 1 has a newly-accessed electric vehicle, other ports are judged not to be charged, a control unit controls a relay switch K11 to be switched on and all other relay switches to be switched off, so that the first charging module 1 charges the electric vehicle, when a second charging port 2 has a new electric vehicle accessed, if the charging module 1 needs to be switched from charging the charging port 1 to charging the charging port 2 at the moment, and the switch control unit controls a first charging module first switch, namely the relay switch K11 to be switched off at the moment, the charging module control unit controls the first charging module 1 to be powered off, when the current value of the relay switch K11 detected by the current detection circuit is zero or the voltage difference value between the two ends of the relay switch K11 detected by the voltage detection circuit is zero, namely the current value of the switched-off relay switch K11 and the voltage difference value between the two ends, the charging module control unit controls the first charging module 1 to be powered on, judges whether the voltage difference value between the two ends of the second switch of the first charging module, namely the voltage difference value between the two ends of the relay switch to be closed meets the safety voltage difference value, if so, the charging module control unit controls the second switch K12 of the first charging module to be closed to charge the second charging port, and therefore, the first charging module 1 can be switched from charging the first charging port 1 to charging the second charging port 2; if not, the voltage difference between the two ends of the second switch of the first charging module is continuously judged until the safe voltage difference value is met to charge the second charging port or the safe voltage difference value is not met within a certain time, and the first charging module is controlled to be powered off. Also in the second embodiment, before the relay switch is turned on, the step of determining the voltage difference between two ends of the relay switch to be turned on in the switch matrix circuit is further included, when the first charging port 1 has a newly connected electric vehicle, it is determined that other ports are not charged, the control unit controls the relay switch K11 to be turned on, and all other relay switches are turned off, so that the first charging module 1 charges the electric vehicle, when the second charging port 2 has a newly connected electric vehicle, if it is necessary to switch the charging module 1 from charging the charging port 1 to charging the charging port 2 at this time, and at this time, the switch control unit controls the first charging module first switch, i.e. the relay switch K11, to be turned off, the charging module control unit controls the first charging module 1 to be turned off, and then the charging module control unit controls the first charging module 1 to be turned on again in a delayed time, the time delay is longer than the time delay of the current on the first switch of the first charging module when the first charging module is powered off, whether the voltage difference between two ends of the second switch of the first charging module, namely the voltage difference between two ends of the relay switch to be closed, meets a safe voltage difference value is judged, if yes, the charging module control unit controls the second switch K12 of the first charging module to be closed to charge the second charging port, and therefore the first charging module 1 can be switched from charging the first charging port 1 to charging the second charging port 2; if not, the voltage difference between the two ends of the second switch of the first charging module is continuously judged until the safe voltage difference value is met to charge the second charging port or the safe voltage difference value is not met within a certain time, and the first charging module is controlled to be powered off.
To avoid reverse charging or to avoid a plurality of rechargeable batteries from forming a charging loop when the rechargeable batteries are connected to the charging module for charging, the output terminal of each charging module and the input terminal of each corresponding charging port of the charger of the present invention are preferably provided with a voltage detection circuit, such as: the output end of the first charging module and the input end of the corresponding first charging port are provided with a voltage detection circuit, the output end of the first charging module and the input end of the corresponding second charging port are provided with a voltage detection circuit, the output end of the second charging module and the input end of the corresponding first charging port are provided with a voltage detection circuit, the output end of the second charging module and the input end of the corresponding second charging port are provided with a voltage detection circuit and the like. When charging switching is needed, the relay switch is closed again when the voltage difference between two ends of the relay switch to be closed is judged to meet a safety value. The voltage detection circuit at this time may be used for detection of the voltage across the opened relay switch in the foregoing embodiment, in addition to the voltage across the relay switch to be closed.
The charging method of the first embodiment of the charger comprises the following steps that a charging module control unit controls a first charging module to be powered on, and a switch control unit controls a first switch of the first charging module to be closed to charge a first charging port; the switch control unit controls the first switch of the first charging module to be switched off, the charging module control unit controls the first charging module to be switched off, and when the current value of the opened relay switch is zero or the voltage difference value between the two ends of the opened relay switch is zero, namely, the current value of the first switch of the first charging module is zero or the voltage difference value between the two ends of the first switch of the first charging module is zero, the charging module control unit controls the first charging module to be electrified, judges the voltage difference value at the two ends of the second switch of the first charging module, namely judges whether the voltage difference value at the two ends of the relay switch to be closed meets the safety value, if so, the charging module control unit controls the first charging module second switch K12 to be closed, charges the second charging port, therefore, the first charging module 1 can be switched from charging the first charging port 1 to charging the second charging port 2; if not, the voltage difference between the two ends of the second switch of the first charging module is continuously judged until the safe voltage difference value is met to charge the second charging port or the safe voltage difference value is not met within a certain time, and the first charging module is controlled to be powered off. Of course, other charging modules may also be used to charge different charging ports, and when switching is required, the method is the same and is not described in detail.
The charging method of the second embodiment of the charger of the invention comprises the following steps that the charging module control unit controls the first charging module to be powered on, and the switch control unit controls the first switch of the first charging module to be closed to charge the first charging port; the switch control unit controls a first switch of the first charging module to be switched off, the charging module control unit controls the first charging module to be switched on in a delayed mode, the delayed time is longer than the time of current delay on the first switch of the first charging module when the first charging module is switched off, the voltage difference value at two ends of a second switch of the first charging module is judged, namely whether the voltage difference value at two ends of a relay switch to be closed meets a safety value is judged, if yes, the charging module control unit controls a second switch K12 of the first charging module to be closed to charge a second charging port, and therefore the first charging module 1 can be switched from charging the first charging port 1 to charging the second charging port 2; if not, the voltage difference between the two ends of the second switch of the first charging module is continuously judged until the safe voltage difference value is met to charge the second charging port or the safe voltage difference value is not met within a certain time, and the first charging module is controlled to be powered off. Of course, other charging modules may also be used to charge different charging ports, and when switching is required, the method is the same and is not described in detail.
The voltage difference between the two ends of the relay switch is the difference between the voltage at the output end of the charging module and the voltage at the input end of the charging port connected to the rechargeable battery. The difference between the voltage at the output end of the charging module and the voltage at the input end of a charging port connected into the electric vehicle is positive or zero, namely the safety differential pressure value is met.
The charger of the present invention may include a charging post.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims (14)

1. A charger comprises a first charging module, a first charging port, a second charging port, a switch matrix circuit and a control unit, wherein the switch matrix circuit comprises a first charging module first switch for connecting the first charging module with the first charging port, a first charging module second switch for connecting the first charging module with the second charging port, and the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch, and is characterized by further comprising a current detection circuit for detecting the current flowing through the first charging module first switch or a voltage detection circuit for detecting the voltage at two ends of the first charging module first switch, when the first charging module needs to be switched to charge the second charging port for charging the first charging port, the control unit is used for controlling the first charging module first switch to be switched off, and controlling the first charging module to be powered off, and when the current value detected by the current detection circuit is zero or the voltage difference value between the two ends detected by the voltage detection circuit is zero, controlling the first charging module to be powered on, and controlling the second switch of the first charging module to be closed.
2. The charger of claim 1, further comprising a second charging module, the switch matrix circuit further comprising a second charging module first switch for connecting the second charging module to the first charging port, a second charging module second switch for connecting the second charging module to the second charging port, the control unit for controlling the switching of the second charging module first switch and the switching of the second charging module second switch, the charger further comprising a current detection circuit for detecting a current flowing through the second charging module first switch or a voltage detection circuit for detecting a voltage across the second charging module first switch, the control unit for controlling the second charging module first switch to be switched off when the second charging module is required to charge the first charging port to the second charging port, and controlling the second charging module to be powered off, and when the current value detected by the current detection circuit is zero or the voltage difference value between the two ends detected by the voltage detection circuit is zero, controlling the second charging module to be powered on, and controlling a second switch of the second charging module to be closed.
3. The charger of claim 2, wherein the voltage detection circuit comprises a voltage detection circuit that detects a voltage at an output terminal of the charging module and a voltage detection circuit that detects a voltage at an input terminal of the charging port.
4. The utility model provides a charger, includes first module, the first port and the second port that charges of charging, switch matrix circuit and the control unit of charging, switch matrix circuit including be used for with first module first switch of charging that the first module and the first port that charges are connected, be used for with the first module second switch of charging that the first module and the second port that charges are connected, the control unit is used for control the switching of the first module first switch that charges with the switching of the first module second switch that charges, its characterized in that, when need charge the first module for first port that charges and switch over for the second port that charges, the control unit is used for controlling the disconnection of the first module first switch that charges, control the first module outage of charging, time delay control the first module that charges circular telegram, the time of time delay is greater than when the first module that charges outage current is in the first module first switch that charges And controlling the first charging module to be powered on at a later time, and controlling a second switch of the first charging module to be closed.
5. The charger of claim 4, further comprising a second charging module, the switch matrix circuit further comprising a second charging module first switch for connecting the second charging module to the first charging port, a second charging module second switch for connecting the second charging module to the second charging port, the control unit for controlling the on/off of the second charging module first switch and the on/off of the second charging module second switch, wherein when it is required to switch the second charging module to charge the first charging port to charge the second charging port, the control unit is for controlling the second charging module first switch to be turned off, controlling the second charging module to be powered off, and controlling the second charging module to be powered on in a delayed manner, the delayed time being longer than a time that a current is delayed on the second charging module first switch when the second charging module is powered off, and controlling the second charging module to be electrified and controlling a second switch of the second charging module to be closed.
6. The charger according to any one of claims 1 to 5, wherein the control unit includes a switch control unit for controlling opening and closing of the charging module switch and a charging module control unit for controlling energization and de-energization of the charging module.
7. The charger according to claim 6, wherein the charging module control unit controls the first charging module first switch and the first charging module second switch by controlling the switch control unit.
8. A charging method of a charger, the charger comprises a first charging module, a first charging port and a second charging port, a switch matrix circuit and a control unit, the switch matrix circuit comprises a first charging module first switch for connecting the first charging module and the first charging port, a first charging module second switch for connecting the first charging module and the second charging port, the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch, and also comprises a current detection circuit for detecting the current of the first charging module first switch or a voltage detection circuit for detecting the voltage of the first charging module first switch, characterized by comprising the following steps, when the first charging module is required to charge the first charging port to be switched to charge the second charging port, and controlling the first switch of the first charging module to be switched off, controlling the first charging module to be switched off, and controlling the first charging module to be switched on and controlling the second switch of the first charging module to be switched on when the current value detected by the current detection circuit is zero or the voltage difference value between the two ends detected by the voltage detection circuit is zero.
9. The charging method of a charger according to claim 8, further comprising a second charging module, said switch matrix circuit further comprising a second charging module first switch for connecting the second charging module to the first charging port, a second charging module second switch for connecting the second charging module to the second charging port, said control unit for controlling the opening and closing of said second charging module first switch and the opening and closing of said second charging module second switch, further comprising a current detection circuit for detecting a current of said second charging module first switch or a voltage detection circuit for detecting a voltage of said second charging module first switch, characterized by further comprising the step of controlling the second charging module first switch to be opened when it is necessary to switch the second charging module to charge the first charging port to charge the second charging port, and controlling the second charging module to be powered off, and when the current value detected by the current detection circuit is zero or the voltage difference value between the two ends detected by the voltage detection circuit is zero, controlling the second charging module to be powered on, and controlling a second switch of the second charging module to be closed.
10. A charging method of a charger comprises a first charging module, a first charging port, a second charging port, a switch matrix circuit and a control unit, wherein the switch matrix circuit comprises a first charging module first switch for connecting the first charging module with the first charging port, a first charging module second switch for connecting the first charging module with the second charging port, and the control unit is used for controlling the on-off of the first charging module first switch and the on-off of the first charging module second switch, and is characterized by comprising the following steps of controlling the first charging module first switch to be switched off, controlling the first charging module to be powered off and controlling the first charging module to be powered on in a delayed manner when the first charging module is required to be switched to charge the second charging port for charging the first charging port, the delayed time is longer than the time of the current delay on the first switch of the first charging module when the first charging module is powered off, the first charging module is controlled to be powered on, and the second switch of the first charging module is controlled to be closed.
11. The charging method of a charger according to claim 10, further comprising a second charging module, said switch matrix circuit further comprising a second charging module first switch for connecting the second charging module to the first charging port, a second charging module second switch for connecting the second charging module to the second charging port, said control unit for controlling the opening and closing of said second charging module first switch and the opening and closing of said second charging module second switch, further comprising a current detection circuit for detecting a current of said second charging module first switch or a voltage detection circuit for detecting a voltage of said second charging module first switch, characterized by further comprising the step of controlling the second charging module first switch to be opened when it is necessary to switch the second charging module to charge the first charging port to charge the second charging port, and controlling the second charging module to be powered off, controlling the second charging module to be powered on in a delayed manner, controlling the second charging module to be powered on and controlling the second switch of the second charging module to be closed, wherein the delayed time is longer than the time of the current delay on the first switch of the second charging module when the second charging module is powered off.
12. The charging method of a charger according to any one of claims 8 to 11, wherein the control unit includes a switch control unit for controlling opening and closing of the charging module switch and a charging module control unit for controlling energization and deenergization of the charging module.
13. The charger of claim 12, wherein the charging module control unit controls the first charging module first switch and the first charging module second switch by controlling the switch control unit.
14. The charging method of the charger according to any one of claims 8 to 11, wherein the first charging module is controlled to be powered off after the first switch of the first charging module is turned off, and the first charging module is controlled to be powered on after the second switch of the first charging module is controlled to be powered on.
CN202110673181.4A 2021-06-17 2021-06-17 Charger and charging method thereof Withdrawn CN113541238A (en)

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CN202110673181.4A CN113541238A (en) 2021-06-17 2021-06-17 Charger and charging method thereof

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Application Number Priority Date Filing Date Title
CN202110673181.4A CN113541238A (en) 2021-06-17 2021-06-17 Charger and charging method thereof

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CN113541238A true CN113541238A (en) 2021-10-22

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