CN110979064A - Power distribution support module used in direct current charging pile - Google Patents

Power distribution support module used in direct current charging pile Download PDF

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Publication number
CN110979064A
CN110979064A CN201911343914.7A CN201911343914A CN110979064A CN 110979064 A CN110979064 A CN 110979064A CN 201911343914 A CN201911343914 A CN 201911343914A CN 110979064 A CN110979064 A CN 110979064A
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Prior art keywords
charging
bridge arm
module
positive
negative
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黄书锐
卢允初
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Shenzhen Feiyouque New Energy Technology Co Ltd
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Shenzhen Feiyouque New Energy Technology Co Ltd
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Priority to CN201911343914.7A priority Critical patent/CN110979064A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • 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
    • 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
    • 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
    • B60L53/60—Monitoring or controlling 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
    • 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

Abstract

A power distribution support module used in a DC charging pile and capable of distributing any charging module in an idle state in the DC charging pile to any charging gun on the charging pile according to charging requirements. Each charging module is separately connected with a plurality of charging guns through a corresponding switching matrix circuit containing a plurality of groups of switch branch circuits, each group of switch branch circuits is composed of a positive electrode path and a negative electrode path, the input end and the output end of the positive electrode path are respectively connected with the positive output end of the charging module and the positive input end of the corresponding charging gun, the input end and the output end of the negative electrode path are respectively connected with the negative output end of the corresponding charging gun and the negative input end of the charging module, and the conduction or the disconnection of each group of switch branch circuits is controlled by an upper computer of the charging pile. The direct current charging pile has the advantages that the equipment cost of the charging pile is reduced, the driving speed is high, the utilization rate of each charging module can be fully improved, the internal space of the direct current charging pile is reduced, and the charging speed under the power support application is accelerated.

Description

Power distribution support module used in direct current charging pile
Technical Field
The invention relates to an electric vehicle charging pile, in particular to a power distribution support module between a charging module and each charging gun in a direct current charging pile.
Background
The current electric automobile fills electric pile trade development as well as fierce, along with BMS battery management system's continuous perfect, also higher and higher to the power requirement who fills electric pile.
At present, a plurality of direct current charging pile systems with high power and a plurality of charging guns are appeared on the market, the power is respectively 120kW, 160kW and 240kW, and the charging guns are respectively provided with double guns, four guns and the like. To the electric pile that fills of these high-power many guns, its inside is equipped with a plurality of units and charges the module (if the power that every unit charges the module is 20kW, that has 120kW fill electric pile and has six unit modules that charge), how to allocate scientifically in the stake each unit charge the module and carry out reasonable power supply for the many guns that get into the output state of charging simultaneously then become the problem that awaits the opportune moment.
1. The ideal mode of the current charging output mode is as follows:
1) when the rifle that charges that gets into the output state of charging is a rifle, the host computer of filling electric pile will gather the electric energy stock of the on-vehicle battery of electric automobile who is charging, and the decision then adopts a unit module of charging or adopts a plurality of units module of charging to get into for this electric automobile and charge. That is, when the electric energy storage is large, it is possible to adopt one unit charging module to complete the charging task quickly, and then one unit charging module is used to charge the unit charging module, and other unit charging modules enter the standby state, so that the service efficiency and the service life of the unit charging module can be effectively improved. When the electric energy storage is less, a plurality of unit charging modules are used for simultaneously charging the electric automobile, so that the charging efficiency is improved, and the waiting time of an owner is reduced.
2) When the charging guns entering the charging output state are multiple guns, as described above, the upper computer can also collect the electric energy storage of the vehicle-mounted batteries of the corresponding number of electric vehicles being charged, and then reasonably distribute the multiple unit charging modules to the electric vehicles with different electric energy storage.
2. In the high-power dc charging pile in the prior art, the power support switching module adopted for the above situation is composed of the following circuits:
as shown in fig. 1, a charging gun is connected to a group of charging modules (a group of charging modules is formed by at least one unit charging module) through a pair of power output contactors with positive and negative wires, and two adjacent groups of charging modules are connected in parallel through a pair of power supporting contactors with positive and negative wires, that is, when all the power supporting contactors are in a conducting state, all the charging modules in the charging pile are in a parallel connection structure.
The charging mode of the structure is as follows:
1) when the charging gun entering the charging output state is a gun, according to the electric energy storage of the vehicle-mounted battery of the electric vehicle being charged, a group of charging modules corresponding to the gun can be used for charging the gun (at this time, the power support contactor adjacent to the group of charging modules is disconnected), or a group of charging modules corresponding to the gun and other groups of charging modules can be used for simultaneously charging the vehicle-mounted battery (at this time, the corresponding power support contactor is opened).
2) When the number of charging guns entering the charging output state is multiple, all the charging modules are distributed as follows according to the electric energy storage of the vehicle-mounted batteries of the plurality of electric vehicles which are being charged:
a. when the electric energy storage of the vehicle-mounted batteries of the electric automobiles is large and each vehicle-mounted battery is enough to finish the charging task by the corresponding charging module, the charging module corresponding to the gun is adopted to charge the vehicle-mounted battery (at this time, the power support contactor adjacent to the charging module entering the charging state is disconnected).
b. When the electric energy stock of a plurality of electric automobile's on-vehicle battery is different, the surplus only needs a module of charging to accomplish promptly, and the surplus is few then needs a plurality of modules of charging to charge for it, and this moment, there are following two kinds of charging methods:
first, when the adjacent both sides of the module that charges that a plurality of guns that charge correspond all have respectively enough the module that charges that is in idle state for its power supply, then a plurality of guns that charge can accomplish respective charging task according to the instruction that the host computer sent.
Second, when at least one charging module with a low electric energy storage amount is not enough to be in an idle state at two adjacent sides of the charging modules corresponding to the plurality of charging guns, and the charging module in the idle state at the other side of the adjacent charging module which is charging is needed to be used, all power supporting contactors from the charging module with the low electric energy storage amount, the adjacent charging module which is charging to the other side of the adjacent charging module which is in the idle state are in an open state.
3. The power support switching mode of the high-power direct-current charging pile in the prior art has the following defects:
1) the need to use several power output contacts and power backup contacts results in a very high investment in components, and such high current contacts are usually sold at prices above thousands yuan each and are bulky.
2) When a plurality of charging guns work simultaneously, if a certain charging gun needs to charge at a large flow rate and the vehicle-mounted batteries corresponding to the charging guns on two sides are charged at a small flow rate, at the moment, the certain charging gun needs to cross over the low-flow charging guns on two sides to charge the vehicle-mounted batteries by other charging modules in an idle state, and due to the fact that the charging modules are in a parallel structure, the charging guns needing to be charged at the low flow rate can increase the charging flow rate, and unnecessary resource waste is caused.
3) In the above-mentioned point "2)", if the power supply mode by the far-side charging module is not adopted, the power support contactors at both sides of the charging module corresponding to the charging gun requiring large-flow charging need to be disconnected, otherwise, the normal charging of the charging gun having small flow and being charged at both sides thereof is affected.
4) In the above-mentioned point "3)", after the power support contactors on both sides of the charging module corresponding to the charging gun for large-flow charging are turned off, this results in a low-efficiency operation mode in which the charging module on the far side cannot be used.
4. Examples are as follows:
as shown in fig. 1, taking a four-gun dc pile system as an example, assuming that the number of charging modules in a charging pile is four, the charging modules are numbered as charging module 1, charging module 2, charging module 3, and charging module 4, and each charging module has an output positive terminal and an output negative terminal. Swt1+, Swt1-, Swt2+, Swt2-, Swt3+ and Swt 3-are power supporting contactors, wherein Swt1+, Swt2+ and Swt3+ are connected between output positive terminals of the four charging modules, and Swt1-, Swt 2-and Swt 3-are connected between output negative terminals of the four charging modules; pA +, OpA-, OpB +, OpB-, OpC +, OpC-, OpD +, OpD-are the positive and negative power output contactors of the A, B, and C guns, respectively.
If the charging module 2 enters a charging state through the OpB + OpB-at a low flow rate, and at this time, the charging module 1 is connected to the vehicle-mounted battery needing large flow rate charging through the OpA + OpA-, then the charging module 3 and the charging module 4 cannot supply power to the A charging gun independently over the charging module 2, and if the A charging gun is powered by forced closing Swt1+ Swt1-, Swt2+ Swt 2-and Swt3+ Swt3-, the charging voltage and the charging current of the B charging gun can be influenced, potential safety hazards are caused to the internal battery of the electric vehicle connected to the B charging gun, and risks such as battery overvoltage or overcurrent easily occur.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a power distribution support module for a direct current charging pile, which can distribute any charging module in an idle state in the direct current charging pile to any charging gun on the charging pile according to the charging requirement.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention discloses a power distribution support module used in a direct current charging pile, which comprises a plurality of charging modules and a plurality of charging guns, and is characterized in that: each charging module is respectively connected with a plurality of charging guns through a corresponding switching matrix circuit, the switching matrix circuit is formed by connecting a plurality of groups of switching sub-circuits in parallel, one group of switching sub-circuits is correspondingly connected with one charging gun in all the charging guns, each group of switching sub-circuit is formed by a positive electrode passage and a negative electrode passage, the input end and the output end of the positive electrode passage are respectively connected with the positive output end of the charging module and the positive input end of the corresponding charging gun, the input end and the output end of the negative electrode passage are respectively connected with the negative output end of the corresponding charging gun and the negative input end of the charging module, and the connection or disconnection of each group of switching sub-circuits is controlled by an upper computer of the charging pile.
The positive electrode path and the negative electrode path are respectively composed of at least one IGBT tube, the grids of the IGBT tubes in the positive electrode path and the negative electrode path are respectively connected with the corresponding control end of the upper computer, and the emitter and the collector of the IGBT tube in the positive electrode path are respectively connected with the positive input end of the corresponding charging gun and the positive output end of the corresponding charging module; and the emitter and the collector of the IGBT tube in the negative electrode passage are respectively connected with the negative input end of the corresponding charging module and the negative output end of the corresponding charging gun.
The positive pole passage and the negative pole passage are respectively formed by connecting an upper bridge arm and a lower bridge arm in series, the upper bridge arm and the lower bridge arm are IGBT tubes, the grids of the two IGBT tubes in the positive pole passage and the negative pole passage are connected in common and are respectively connected with the control ends corresponding to the upper computer, wherein,
in the positive electrode passage, the collector electrode of the IGBT tube of the upper bridge arm is connected with the positive output end of the corresponding charging module, the emitter electrode of the IGBT tube of the upper bridge arm is connected with the emitter electrode of the IGBT tube of the lower bridge arm, and the collector electrode of the IGBT tube of the lower bridge arm is connected with the positive input end of the corresponding charging gun;
in the negative electrode passage, the collector of the IGBT tube of the upper bridge arm is connected with the negative output end of the corresponding charging module, the emitter of the IGBT tube of the upper bridge arm is connected with the emitter of the IGBT tube of the lower bridge arm, and the collector of the IGBT tube of the lower bridge arm is connected with the negative input end of the corresponding charging gun.
The positive pole passage and the negative pole passage are respectively formed by connecting an upper bridge arm and a lower bridge arm in series, the upper bridge arm and the lower bridge arm are both MOS tubes, the grids of the two MOS tubes in the positive pole passage and the negative pole passage are connected in common and are respectively connected with the corresponding control ends of the upper computer, wherein,
in the positive electrode passage, the gate electrode of the MOS tube of the upper bridge arm is connected with the positive output end of the corresponding charging module, the source electrode of the MOS tube of the upper bridge arm is connected with the source electrode of the MOS tube of the lower bridge arm, and the gate electrode of the MOS tube of the lower bridge arm is connected with the positive input end of the corresponding charging gun;
in the negative electrode path, the gate electrode of the MOS tube of the upper bridge arm is connected with the negative output end of the corresponding charging module, the source electrode of the MOS tube of the upper bridge arm is connected with the source electrode of the MOS tube of the lower bridge arm, and the collector electrode of the MOS tube of the lower bridge arm is connected with the negative input end of the corresponding charging gun.
The upper bridge arm is formed by connecting a plurality of IGBT tubes in parallel, and the lower bridge arm is formed by connecting a plurality of IGBT tubes in parallel; or the upper bridge arm is formed by connecting a plurality of MOS tubes in parallel, and the lower bridge arm is formed by connecting a plurality of MOS tubes in parallel.
The outer surface of the IGBT tube or the MOS tube is pasted with a heat-conducting ceramic plate, the outer side surface of the heat-conducting ceramic plate is pasted with a heat radiating fin, and heat energy on the heat radiating fin is dissipated to the outside of the charging pile through a fan arranged in the charging pile;
or, the outer surface of the IGBT tube or the MOS tube is pasted with a heat-conducting ceramic piece, the outer side surface of the heat-conducting ceramic piece is pasted with a radiating fin internally provided with a cooling water circulation channel, and the cooling water circulation channel is connected with a refrigerator arranged in the charging pile.
The charging module comprises at least one charging module with standard output power.
The number of the charging modules is odd or even; the number of the charging guns is odd or even.
The number of the charging modules is the same as that of the charging guns.
The output power of each charging module is the integral multiple of 5 kW.
The invention is suitable for any number of charging modules and any number of charging guns, and the upper computer adopts an independent control mode by arranging the switch branch circuit between each group of charging modules and any charging gun, so that each group of charging modules in an idle state can independently supply power for any charging gun at any time without being influenced by other charging modules in a power supply state in the prior art. The switch distribution circuit of the invention is composed of IGBT tubes with lower selling price, which not only reduces the equipment cost of the charging pile and has high driving speed, but also can fully improve the utilization rate of each charging module, reduce the internal space of the DC charging pile and accelerate the charging speed under the power support application.
Drawings
Fig. 1 is a circuit diagram of a power-supporting switching module in a dc charging post in the prior art.
Fig. 2 is a block diagram of a power-supporting switching module according to the present invention.
Fig. 3 is a schematic circuit diagram of fig. 2.
Fig. 4 is a schematic diagram of a switching matrix circuit in fig. 2.
Detailed Description
The power distribution support module (hereinafter referred to as support module) used in the direct current charging pile (hereinafter referred to as charging pile) is suitable for the direct current charging pile with odd number of charging modules, even number of charging modules and odd-even number of charging modules, moreover, each group of charging modules and any charging gun arranged on the charging pile are provided with a switching circuit for independently supplying power, when a certain group of charging modules is in an idle state (under the condition of not charging the charging gun), the switching circuit can independently supply power to any charging gun according to the instruction of the upper computer of the charging pile, and cannot be influenced by other charging modules charging the any charging gun.
Every the module that charges contains at least one standard output's the module that charges, every the output of the module that charges is 5 kW's integer times, and the preferred every module that charges is 20 kW.
Similarly, the number of charging guns of the charging pile can be odd number, even number or combination of odd and even numbers.
The support module of the present invention is preferably applied to charging piles having the same number of charging modules and charging guns.
As shown in fig. 2-4, a switching matrix circuit corresponding to each other is disposed between each charging module and each charging gun in the support module of the present invention, and the switching matrix circuit is formed by connecting multiple sets of switching sub-circuits in parallel, wherein each set of switching sub-circuit is correspondingly connected to only one charging gun of all charging guns. Like this, every group charge the module and all can correspond the meeting with any rifle that charges alone through the switch that corresponds divides the circuit.
Each group of switch distribution circuits consists of a positive electrode circuit and a negative electrode circuit, the input end and the output end of the positive electrode circuit are respectively connected with the positive output end of the charging module and the positive input end of the corresponding charging gun, the input end and the output end of the negative electrode circuit are respectively connected with the negative output end of the corresponding charging gun and the negative input end of the charging module, and the on-off of each group of switch distribution circuits is controlled by the upper computer of the charging pile.
In the present invention, the positive electrode path and the negative electrode path may be a switching circuit with electromagnetic control or a switching circuit composed of a plurality of separate elements, and the following configuration of the switching circuit is preferable.
1. Each positive electrode path and each negative electrode path are respectively composed of an IGBT tube, and the connection mode is as follows:
the gates of the IGBT tubes in the positive electrode path and the negative electrode path are respectively connected with the corresponding control ends of the upper computer, wherein,
the positive pole passage and the negative pole passage are respectively composed of at least one IGBT tube, and the grids of the IGBT tubes in the positive pole passage and the negative pole passage are respectively connected with the corresponding control ends of the upper computer.
The emitter and the collector of the IGBT tube in the positive electrode passage are respectively connected with the positive input end of the corresponding charging gun and the positive output end of the corresponding charging module;
and the emitter and the collector of the IGBT tube in the negative electrode passage are respectively connected with the negative input end of the corresponding charging module and the negative output end of the corresponding charging gun.
The IGBT tube can be replaced by an MOS tube.
2. Each positive pole passage and each negative pole passage are formed by connecting an upper bridge arm and a lower bridge arm in series, the upper bridge arm and the lower bridge arm are respectively formed by connecting an IGBT (insulated gate bipolar transistor) tube or an MOS (metal oxide semiconductor) tube in series, and the connection mode is as follows:
1) the upper bridge arm and the lower bridge arm adopt IGBT tubes
The grids of the two IGBT tubes in the positive electrode path and the negative electrode path are connected in common and respectively connected with the corresponding control ends of the upper computer, wherein,
in the positive electrode passage, the collector electrode of the IGBT tube of the upper bridge arm is connected with the positive output end of the corresponding charging module, the emitter electrode of the IGBT tube of the upper bridge arm is connected with the emitter electrode of the IGBT tube of the lower bridge arm, and the collector electrode of the IGBT tube of the lower bridge arm is connected with the positive input end of the corresponding charging gun;
in the negative electrode passage, the collector of the IGBT tube of the upper bridge arm is connected with the negative output end of the corresponding charging module, the emitter of the IGBT tube of the upper bridge arm is connected with the emitter of the IGBT tube of the lower bridge arm, and the collector of the IGBT tube of the lower bridge arm is connected with the negative input end of the corresponding charging gun.
According to the invention, the emitters of the IGBT tube of the upper bridge arm and the IGBT tube of the lower bridge arm in the positive electrode passage are connected in common, and the emitters of the IGBT tube of the upper bridge arm and the IGBT tube of the lower bridge arm in the negative electrode passage are connected in common, so that the phenomenon of current back-flow after the vehicle-mounted battery is fully charged can be prevented.
The IGBT (also called an IGBT, hereinafter referred to as a transistor) is of type IKW50N65EH5, the breakdown voltage thereof is 650V, and the current specification is determined by the output current specification of the charging module.
2) The upper bridge arm and the lower bridge arm adopt MOS tubes
The grids of two MOS tubes in the anode passage and the cathode passage are connected together and respectively connected with the corresponding control ends of the upper computer, wherein,
in the positive electrode passage, the gate electrode of the MOS tube of the upper bridge arm is connected with the positive output end of the corresponding charging module, the source electrode of the MOS tube of the upper bridge arm is connected with the source electrode of the MOS tube of the lower bridge arm, and the gate electrode of the MOS tube of the lower bridge arm is connected with the positive input end of the corresponding charging gun;
in the negative electrode path, the gate electrode of the MOS tube of the upper bridge arm is connected with the negative output end of the corresponding charging module, the source electrode of the MOS tube of the upper bridge arm is connected with the source electrode of the MOS tube of the lower bridge arm, and the collector electrode of the MOS tube of the lower bridge arm is connected with the negative input end of the corresponding charging gun.
3) The upper bridge arm can be formed by connecting a plurality of IGBT tubes in parallel, and the lower bridge arm can be formed by connecting a plurality of IGBT tubes in parallel; or the upper bridge arm can be formed by connecting a plurality of MOS tubes in parallel, and the lower bridge arm can be formed by connecting a plurality of MOS tubes in parallel.
3. Heat dissipation problem of IGBT (insulated Gate Bipolar transistor) tube and MOS (Metal oxide semiconductor) tube
Since the power distribution support module uses a power switching device such as an IGBT or a MOSFET, and belongs to a heating element, heat dissipation needs to be considered in the power distribution support module.
There are two heat dissipation schemes:
1) air cooling
The power switch devices such as IGBT or MOSFET are tightly attached to the radiating fin through the heat-conducting ceramic chip, the fan is additionally arranged, and heat is dissipated to the outside of the charging pile through the air quantity of the fan.
2) Water cooling
The power switch devices such as IGBT or MOSFET are tightly attached to the radiating fin through the heat-conducting ceramic sheet, the water channel is formed in the radiating fin, and cooling water flows through the water channel through the external refrigeration compressor, so that the radiating effect is achieved.
The operation principle of the present invention will be described with reference to fig. 4, and fig. 4 shows a switching matrix circuit provided between the charging module 1 and each charging gun.
In fig. 4, the first transistor Q1 to the sixteenth transistor Q16 are all N-type IGBT transistors. Drv1A + and Drv 1A-are respectively drive signals of a positive electrode path and a negative electrode path of the corresponding switch sub circuit, and the two are isolated from each other; similarly, Drv1B + and Drv1B-, Drv1C + and Drv1C-, and Drv1D + and Drv 1D-are driving signals of the positive pole path and the negative pole path in other switching sub-circuits, respectively.
Now, the connection and power supply relationship between the charging module 1 and the charging gun A will be described as an example.
1. A positive electrode passage and a negative electrode passage between the charging module 1 and the charging gun A are respectively formed by connecting two IGBT tubes in series, and the positive electrode passage is formed by connecting a first transistor Q1 (namely the upper arm IGBT tube) and a second transistor Q2 (namely the lower arm IGBT tube) according to the connecting method; the negative electrode path is formed by connecting the ninth transistor Q9 (i.e., the upper arm IGBT tube) and the tenth transistor Q10 (i.e., the lower arm IGBT tube) by the aforementioned connection method.
2. When the charging module 1 needs to supply power to the charging gun A for output, the driving signals Drv1A + and Drv 1A-are at high level, and the positive electrode path and the negative electrode path are conducted, so that the charging module 1 supplies power to the charging gun A. At this time, the driving signals Drv1B +, Drv1B-, Drv1C +, Drv1C-, Drv1D + and Drv 1D-of the other switching sub circuits are at a low level, and the positive electrode path and the negative electrode path corresponding to the other switching sub circuits are cut off.
3. When the charging module 1 is in an idle state and needs to supply power to a certain charging gun, the charging module 1 is enabled to switch on a switch branch circuit between the charging module 1 and the charging gun through the method, and a switch branch circuit between the charging module 1 and other charging guns is closed.
Namely: when the charging module 1 is in a state of supplying power to the nth charging gun of the M charging guns, the charging module 1 stops supplying power to other charging guns. If the nth charging gun needs other charging modules to supply power to the nth charging gun, the switch branch circuit between the other charging modules in the idle state and the nth charging gun needs to be switched on.

Claims (10)

1. The utility model provides a power distribution support module for direct current fills electric pile, includes that a plurality of charges module and a plurality of rifle that charges, its characterized in that: each charging module is respectively connected with a plurality of charging guns through a corresponding switching matrix circuit, the switching matrix circuit is formed by connecting a plurality of groups of switching sub-circuits in parallel, one group of switching sub-circuits is correspondingly connected with one charging gun in all the charging guns, each group of switching sub-circuit is formed by a positive electrode passage and a negative electrode passage, the input end and the output end of the positive electrode passage are respectively connected with the positive output end of the charging module and the positive input end of the corresponding charging gun, the input end and the output end of the negative electrode passage are respectively connected with the negative output end of the corresponding charging gun and the negative input end of the charging module, and the connection or disconnection of each group of switching sub-circuits is controlled by an upper computer of the charging pile.
2. The power distribution support module for use in a dc charging post according to claim 1, wherein: the positive electrode path and the negative electrode path are respectively composed of at least one IGBT tube, the grids of the IGBT tubes in the positive electrode path and the negative electrode path are respectively connected with the corresponding control end of the upper computer, and the emitter and the collector of the IGBT tube in the positive electrode path are respectively connected with the positive input end of the corresponding charging gun and the positive output end of the corresponding charging module; and the emitter and the collector of the IGBT tube in the negative electrode passage are respectively connected with the negative input end of the corresponding charging module and the negative output end of the corresponding charging gun.
3. The power distribution support module for use in a dc charging post according to claim 1, wherein: the positive pole passage and the negative pole passage are respectively formed by connecting an upper bridge arm and a lower bridge arm in series, the upper bridge arm and the lower bridge arm are IGBT tubes, the grids of the two IGBT tubes in the positive pole passage and the negative pole passage are connected in common and are respectively connected with the control ends corresponding to the upper computer, wherein,
in the positive electrode passage, the collector electrode of the IGBT tube of the upper bridge arm is connected with the positive output end of the corresponding charging module, the emitter electrode of the IGBT tube of the upper bridge arm is connected with the emitter electrode of the IGBT tube of the lower bridge arm, and the collector electrode of the IGBT tube of the lower bridge arm is connected with the positive input end of the corresponding charging gun;
in the negative electrode passage, the collector of the IGBT tube of the upper bridge arm is connected with the negative output end of the corresponding charging module, the emitter of the IGBT tube of the upper bridge arm is connected with the emitter of the IGBT tube of the lower bridge arm, and the collector of the IGBT tube of the lower bridge arm is connected with the negative input end of the corresponding charging gun.
4. The power distribution support module for use in a dc charging post according to claim 1, wherein: the positive pole passage and the negative pole passage are respectively formed by connecting an upper bridge arm and a lower bridge arm in series, the upper bridge arm and the lower bridge arm are both MOS tubes, the grids of the two MOS tubes in the positive pole passage and the negative pole passage are connected in common and are respectively connected with the corresponding control ends of the upper computer, wherein,
in the positive electrode passage, the gate electrode of the MOS tube of the upper bridge arm is connected with the positive output end of the corresponding charging module, the source electrode of the MOS tube of the upper bridge arm is connected with the source electrode of the MOS tube of the lower bridge arm, and the gate electrode of the MOS tube of the lower bridge arm is connected with the positive input end of the corresponding charging gun;
in the negative electrode path, the gate electrode of the MOS tube of the upper bridge arm is connected with the negative output end of the corresponding charging module, the source electrode of the MOS tube of the upper bridge arm is connected with the source electrode of the MOS tube of the lower bridge arm, and the collector electrode of the MOS tube of the lower bridge arm is connected with the negative input end of the corresponding charging gun.
5. The power distribution support module for use in a dc charging post according to claim 3 or 4, wherein: the upper bridge arm is formed by connecting a plurality of IGBT tubes in parallel, and the lower bridge arm is formed by connecting a plurality of IGBT tubes in parallel; or the upper bridge arm is formed by connecting a plurality of MOS tubes in parallel, and the lower bridge arm is formed by connecting a plurality of MOS tubes in parallel.
6. The power distribution support module for use in a dc charging post according to claim 5, wherein: the outer surface of the IGBT tube or the MOS tube is pasted with a heat-conducting ceramic plate, the outer side surface of the heat-conducting ceramic plate is pasted with a heat radiating fin, and heat energy on the heat radiating fin is dissipated to the outside of the charging pile through a fan arranged in the charging pile;
or, the outer surface of the IGBT tube or the MOS tube is pasted with a heat-conducting ceramic piece, the outer side surface of the heat-conducting ceramic piece is pasted with a radiating fin internally provided with a cooling water circulation channel, and the cooling water circulation channel is connected with a refrigerator arranged in the charging pile.
7. The power distribution support module for use in a dc charging post according to claim 5, wherein: the charging module comprises at least one charging module with standard output power.
8. The power distribution support module for use in a dc charging post according to claim 5, wherein: the number of the charging modules is odd or even; the number of the charging guns is odd or even.
9. The power distribution support module for use in a dc charging post according to claim 8, wherein: the number of the charging modules is the same as that of the charging guns.
10. The power distribution support module for use in a dc charging post according to claim 9, wherein: the output power of each charging module is the integral multiple of 5 kW.
CN201911343914.7A 2019-12-24 2019-12-24 Power distribution support module used in direct current charging pile Pending CN110979064A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116394796A (en) * 2023-06-05 2023-07-07 广东天枢新能源科技有限公司 Charging control method, system, device and storage medium based on power distribution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116394796A (en) * 2023-06-05 2023-07-07 广东天枢新能源科技有限公司 Charging control method, system, device and storage medium based on power distribution

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