CN119502737B - Direct-current output module of battery charger and battery charger - Google Patents

Direct-current output module of battery charger and battery charger

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Publication number
CN119502737B
CN119502737B CN202411731879.7A CN202411731879A CN119502737B CN 119502737 B CN119502737 B CN 119502737B CN 202411731879 A CN202411731879 A CN 202411731879A CN 119502737 B CN119502737 B CN 119502737B
Authority
CN
China
Prior art keywords
direct current
battery
power
contactor
power terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202411731879.7A
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Chinese (zh)
Other versions
CN119502737A (en
Inventor
赵宏博
袁志强
吴礼春
钟文平
刘明涛
郭科成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Sinexcel Electrical Co ltd
Original Assignee
Shenzhen Sinexcel Electrical Co ltd
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Publication date
Application filed by Shenzhen Sinexcel Electrical Co ltd filed Critical Shenzhen Sinexcel Electrical Co ltd
Priority to CN202411731879.7A priority Critical patent/CN119502737B/en
Publication of CN119502737A publication Critical patent/CN119502737A/en
Application granted granted Critical
Publication of CN119502737B publication Critical patent/CN119502737B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B60L53/30—Constructional details of charging stations
    • B60L53/302—Cooling of charging equipment
    • 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
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • 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
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a direct-current output module of a battery-changing charger and the battery-changing charger, and belongs to the technical field of electric automobile charging. The direct current output modules of the battery-changing charger are integrated in the shell, two groups of direct current output units are symmetrically arranged in each shell, each group of direct current output units comprises a controller, a switching power supply, an axial fan, a direct current electric energy meter, copper bars, a direct current contactor, a current divider and a fuse, and a signal terminal and a power terminal are arranged on the outer wall of the shell. The direct current output module of this scheme compact structure, integrated level are high, make things convenient for the dismouting, and follow-up maintenance is changed conveniently, has simplified and has traded electric cabinet design complexity, has greatly improved space utilization, has reduced the maintenance degree of difficulty and cost.

Description

Direct-current output module of battery charger and battery charger
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to a direct-current output module of a battery-changing charger and the battery-changing charger.
Background
With the high-speed development of the new energy industry in China, the market share of electric automobiles is rapidly improved. In order to meet the rapid and convenient electricity supplementing requirement of electric automobile users, the construction of electric automobile supporting facilities becomes particularly important. Charging piles in the current market are gradually developed to a high-power charging direction, but the charging speed is still not as high as that of the charging. Therefore, the development of the battery exchange station is particularly critical, and particularly, a battery exchange charger capable of simultaneously charging a plurality of battery packs is required.
The current common multi-output battery-changing machine in the market is usually designed in a way that output power loops are arranged side by side or layered up and down. The power, control, and metering devices are often stacked on two sides or distributed in other locations due to the limited cabinet space. As shown in FIG. 1, the conventional battery charger is a common layout, wherein a charging module is arranged at the uppermost layer, a controller for outputting direct current in each path is arranged at the lower layer of the charging module, a copper bar connected with a direct current contactor and a current divider is arranged at the lower layer of the controller, and a copper bar connected with the direct current contactor and a fuse is arranged at the lowermost layer.
However, the design of the power exchange station is limited by the size and arrangement of other devices such as a battery compartment, a mechanical arm and the like, and strict requirements are imposed on the size of the devices. Existing designs of dc output loop arrangements or stacked arrangements can lead to increased equipment size, contrary to the compact design requirements of the equipment. In addition, the position arrangement of power supply, control and metering devices in the cabinet is disordered, the early design difficulty is high, the input cost is high, the equipment wiring is complex, and the later maintenance and fault investigation are not facilitated.
Therefore, a new design scheme of the multi-output battery-changing machine is required to be provided, so that the problems of increased size, complex design, difficult maintenance and the like in the existing design scheme are solved, and the strict requirements of a battery-changing station on the equipment size and layout are met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a direct-current output module of a battery charger and the battery charger aiming at the defects in the prior art.
The invention provides a direct current output module of a battery-changing charger, which comprises a shell, wherein two groups of direct current output units are symmetrically arranged in the shell along the depth direction, and each direct current output unit comprises a controller, a switching power supply, an axial flow fan, a direct current electric energy meter, a copper bar, a direct current contactor, a current divider and a fuse;
The signal terminal comprises a power supply and a communication terminal, and is connected with a switch power supply, a controller, a battery pack, a charging terminal and a battery-changing charger control board, and is used for providing an input power supply for the direct-current output module and providing communication interfaces with the battery pack, the charging terminal and the battery-changing charger control board for the controller;
the switching power supply is used for supplying power to the internal elements of the direct-current output module;
The axial flow fan is arranged close to one side wall of the shell and used for radiating heat of the direct current output module;
the direct current electric energy meter is connected with the current divider and the copper bar and is used for measuring the electricity consumption of a battery pack power loop in the direct current output module;
The charging module in the battery changing charger is connected with the power terminal, and the power terminal is connected with the direct current contactor, the current divider and the fuse through the copper bar and then connected with the battery pack or the charging terminal;
The controller is connected with the direct-current electric energy meter and the direct-current contactor, and is used for feeding back battery charging information, metering information of a power loop and state information inside the direct-current output module to the battery charging machine control board, and carrying out power output allocation inside the direct-current output module by controlling on-off of the direct-current contactor.
The shell comprises a first side wall, a second side wall, a third side wall and a fourth side wall, wherein the first side wall and the second side wall are respectively positioned at the top and the bottom of the shell, the copper bars are arranged along the height direction of the direct current output module, through holes for the copper bars to penetrate are formed in the positions, opposite to the copper bars, of the first side wall and the second side wall, the third side wall is opposite to the axial flow fan, heat dissipation holes are formed in the positions, opposite to the axial flow fan, of the third side wall, and the signal terminals and the power terminals are arranged on the fourth side wall.
Preferably, in the casing, the axial fan is disposed at a position close to the lower portion of the third side wall, the switching power supply is disposed at a side, away from the third side wall, of the axial fan, the controller is disposed above the axial fan and the switching power supply, the direct current electric energy meter is disposed below the switching power supply, and the copper bar is disposed at a side, away from the third side wall, of the controller and the switching power supply.
Preferably, the two sets of direct current output units share the axial flow fan and the direct current electric energy meter.
Preferably, the signal terminal is used for supplying power to the switch power supply and the direct-current electric energy meter, the switch power supply is used for supplying power to the controller, the axial-flow fan and the direct-current contactor, and the switch power supply is used for supplying power to the battery pack through the signal terminal.
The direct current contactor comprises a first direct current contactor, a second direct current contactor, a third direct current contactor, a fourth direct current contactor, a fifth direct current contactor and a sixth direct current contactor, wherein the copper bars comprise a first copper bar and a second copper bar, the first copper bar is connected with the fifth direct current contactor, the third direct current contactor, the fuse and the first direct current contactor from top to bottom, and the second copper bar is connected with the sixth direct current contactor, the fourth direct current contactor, the second direct current contactor and the shunt from top to bottom.
The first copper bar is provided with a first power terminal access point, a second power terminal access point, a charging terminal anode and a battery pack anode, wherein the first power terminal access point is positioned between the fuse and the third direct current contactor, the second power terminal access point is positioned between the fifth direct current contactor and the third direct current contactor, the charging terminal anode is positioned at the upper end of the fifth contactor, and the battery pack anode is positioned at the lower end of the first contactor;
the second copper bar is provided with a third power terminal access point, a fourth power terminal access point, a charging terminal negative electrode and a battery pack negative electrode, wherein the third power terminal access point is positioned between the fourth direct current contactor and the second direct current contactor, the fourth power terminal access point is positioned between the sixth direct current contactor and the fourth direct current contactor, the charging terminal negative electrode is positioned at the upper end of the sixth contactor, and the battery pack negative electrode is positioned at the lower end of the current divider.
Preferably, the power terminal comprises a first power terminal positive electrode, a first power terminal negative electrode, a second power terminal positive electrode and a second power terminal negative electrode;
the charging module comprises a first charging module and a second charging module;
The output positive electrode of the first charging module is connected with the positive electrode of the first power terminal, and the positive electrode of the first power terminal is connected with the first power terminal access point; the output cathode of the first charging module is connected with the cathode of the first power terminal, and the cathode of the first power terminal is connected with the access point of the third power terminal;
the second charging module output anode is connected with the second power terminal anode, the second power terminal anode is connected with the second power terminal access point, the second charging module output cathode is connected with the second power terminal cathode, and the second power terminal cathode is connected with the fourth power terminal access point.
The embodiment of the invention also provides a battery charger, which comprises a plurality of battery charger direct current output modules.
The direct current output module of the battery-changing charger is integrated in the shell, two groups of direct current output units are symmetrically arranged in each shell, each group of direct current output units comprises a controller, a switching power supply, an axial flow fan, a direct current electric energy meter, copper bars, a direct current contactor, a current divider and a fuse, and the outer wall of the shell is provided with a signal terminal and a power terminal. The direct current output module of this scheme compact structure, integrated level are high, make things convenient for the dismouting, and follow-up maintenance is changed conveniently, has simplified and has traded electric cabinet design complexity, has greatly improved space utilization, has reduced the maintenance degree of difficulty and cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic diagram of a prior art battery charger layout.
Fig. 2 is an exploded view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 3 is a perspective assembly view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 4 is a front view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 5 is a rear view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 6 is a left side view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 7 is a right side view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 8 is a bottom view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 9 is a top view of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 10 is a detailed schematic diagram of a copper bar and a dc contactor of a dc output module of a battery-changing charger according to an embodiment of the present invention.
Fig. 11 is a detailed schematic diagram of a power terminal of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 12 is a schematic diagram of a connection terminal of a dc output module of a battery charger according to an embodiment of the present invention.
Fig. 13 is an assembly schematic diagram of a plurality of dc output modules of a battery charger according to an embodiment of the present invention.
Fig. 14 is an assembly schematic diagram of another view angle of a plurality of dc output modules of a battery charger according to an embodiment of the present invention.
Fig. 15 is a schematic layout diagram of a battery charger according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiments of the invention are described in further detail below with reference to the drawings. It is to be understood that the embodiments described herein are for illustration and explanation of the invention only and are not intended to limit the invention.
The direct current output module of the battery change charger provided by the embodiment of the invention is used as a direct current output control unit in the battery change charger and is responsible for receiving the charging requirement of the battery BMS, sending the charging requirement and the battery BMS information to a control board of the battery change charger, controlling the power output of the battery change charger to a battery pack and an electric automobile, and metering charging data.
As shown in fig. 2-9, the embodiment of the invention provides a direct current output module of a battery-changing charger, which comprises a shell 1, wherein two groups of direct current output units are symmetrically arranged in the shell 1 along the depth direction, each direct current output unit comprises a controller 2, a switching power supply 3, an axial fan 4, a direct current electric energy meter 5, a copper bar 7, a direct current contactor 8, a current divider 10 and a fuse 11, and a signal terminal 6 and a power terminal 9 are arranged on the outer wall of the shell;
The signal terminal 6 comprises a power supply and a communication terminal, and the signal terminal 6 is connected with the switch power supply 3, the controller 2, the battery pack, the charging terminal and the battery change charger control board, and is used for providing an input power supply for the direct current output module and providing a communication interface with the battery pack, the charging terminal and the battery change charger control board for the controller.
The signal terminal 6 is an interactive interface of the direct current output module of the battery replacement charger, the battery replacement charger and the battery BMS, and the signal terminal 6 has functions of supplying power to the module, communicating between the module and the battery replacement charger, feeding back signals, supplying power to the battery BMS, supplying power to the battery auxiliary power supply, communicating with the battery BMS and the like. The signal terminal 6 is provided with a group of power supply interfaces, and an AC220V power supply of the battery charger is connected to the signal terminal 6 to provide working power supply for the direct current output module.
The switching power supply 3 is used for supplying power to the internal elements of the direct current output module.
In some embodiments of the present invention, the signal terminal 6 supplies power to the switching power supply 3 and the dc electric energy meter 5, the switching power supply 3 supplies power to the controller 2, the axial fan 4 and the dc contactor 8, and the switching power supply 3 also supplies power to the battery pack through the signal terminal 6.
The axial flow fan 4 is disposed near one side wall of the housing 1, and is used for dissipating heat from the dc output module.
The direct current electric energy meter 5 is connected with the current divider 10 and the copper bar 7 and is used for measuring the electricity consumption of a battery pack power loop in the direct current output module;
the charging module in the battery-changing charger is connected with the power terminal 9, and the power terminal 9 is connected with the direct-current contactor 8, the current divider 10 and the fuse 11 through the copper bar 7 and then is connected with a battery pack or a charging terminal.
The direct current output module of the battery-changing charger comprises two groups of direct current output units, wherein each group of direct current output units can independently charge a battery pack in the battery-changing station, can also provide output power for a charging pile connected outside the battery-changing station, and is compatible with providing power output for the charging pile outside the battery-changing station when the battery pack is charged. The two groups of direct current output units are symmetrically arranged, so that the direct current output module has a more compact overall structure and a smaller volume.
In the embodiment of the invention, the shell 1 comprises a first side wall 1A, a second side wall 1B, a third side wall 1C and a fourth side wall 1D, wherein the first side wall 1A and the second side wall 1B are respectively positioned at the top and the bottom of the shell 1, the copper bar 7 is arranged along the height direction of the direct current output module, a through hole 1B1 for the copper bar to penetrate is arranged at the position, opposite to the copper bar 7, of the first side wall 1A and the second side wall 1B, the third side wall 1C is opposite to the axial flow fan 4, an air inlet hole 1C1 is arranged at the position, opposite to the axial flow fan 4, of the third side wall 1C, an air outlet hole 1D1 is arranged in the middle of the fourth side wall 1D, and in the charging process, the axial flow fan 4 sucks cold air at the rear part of the direct current output module through the air inlet hole 1C1, and pushes internal hot air to be discharged through the air outlet hole 1D 1. The signal terminals 6 and the power terminals 9 are disposed on the fourth side wall 1D.
As shown in fig. 3 and 4, specifically, in the housing, the axial fan 4 is disposed at a position close to the lower portion of the third side wall 1C, the switching power supply 3 is disposed on a side of the axial fan 4 away from the third side wall 1C, the controller 2 is disposed above the axial fan 4 and the switching power supply 3, the dc electric energy meter 5 is disposed below the switching power supply 3, and the copper bar 7 is disposed on a side of the controller 2 and the switching power supply 3 away from the third side wall 1C. And among the 6 surfaces of the shell, the two surfaces opposite to the direct current output unit are not sealed, so that the internal elements can be conveniently and quickly assembled, disassembled and replaced.
In some embodiments of the present invention, the two sets of dc output units share the axial fan 4 and the dc electric energy meter 5. The direct current electric energy meter 5 supports two-way metering.
In the embodiment of the present invention shown in fig. 2, 3, 4, 11 and 14, a handle is disposed on the fourth side wall, and the dc output module can be conveniently plugged into and pulled out from the plug frame in the cabinet through the handle. The bottom of the shell 1 is smooth, the plug is convenient, screw holes are formed in the left and right sides of the shell 1, and the direct current output module can be locked on the plug frame in the cabinet through the screw holes.
The controller 2 is connected with the direct current electric energy meter 5 and the direct current contactor 8, and the controller 2 is used for feeding back battery charging information, metering information of a power loop and state information inside the direct current output module to the battery charging machine control board, and carrying out power output allocation inside the direct current output module by controlling on-off of the direct current contactor 8.
The controller 2 obtains the battery charging information from the battery pack through the signal terminal 6, wherein the battery charging information comprises battery codes, battery electric quantity and charging requirements. The state information in the DC output module comprises a DC contactor state, a fuse state and a controller communication state.
The current divider 10 is always connected in the power loop, the direct current electric energy meter 5 is connected with a signal interface of the current divider 10 through a cable to sample current, is connected with the copper bar 7 to sample voltage, and is connected with the controller 2 to upload electric quantity data. The controller 2 transmits the electric quantity data to a battery charger control board through a signal terminal 6, and the battery charger control board completes real-time display and charging.
The copper bar 7 and the power terminal 9 provide a power interface and power transmission for the whole direct current output module, and the power control and output are achieved by connecting the charging power module, the battery power interface and the charging terminal. The copper bar 7 is connected with a direct current contactor 8, a power terminal 9, a shunt 10 and a fuse 11 inside the direct current output module, and is connected with an external battery pack and a direct current charging terminal (pile) through cables. The charging module is arranged outside the direct current output module, outputs power to the direct current output module through the power terminal 9, and is controlled by the direct current output module to be output to the battery pack and the charging terminal. The fuse 11 is used for short-circuit and overload protection of the power output circuit.
The direct current contactor 8 is controlled by the control board 2 to complete the output control of the power distribution, the pre-charging stage and the charging stage of the battery-changing charger. As shown in fig. 10, in the embodiment of the present invention, in each set of dc output units, the dc contactor 8 includes a first dc contactor 81, a second dc contactor 82, a third dc contactor 83, a fourth dc contactor 84, a fifth dc contactor 85, and a sixth dc contactor 86, the copper bar 7 includes a first copper bar 71 and a second copper bar 72, the first copper bar 71 is connected with the fifth dc contactor 85, the third dc contactor 83, the fuse 11, and the first dc contactor 81 from top to bottom, and the second copper bar 72 is connected with the sixth dc contactor 86, the fourth dc contactor 84, the second dc contactor 82, and the shunt 10 from top to bottom.
The first copper bar 71 is provided with a first power terminal access point 711, a second power terminal access point 712, a charging terminal anode 713 and a battery pack anode 714, wherein the first power terminal access point 711 is located between the fuse 11 and the third dc contactor 83, the second power terminal access point 712 is located between the fifth dc contactor 85 and the third dc contactor 83, the charging terminal anode 713 is located at the upper end of the fifth contactor 85, and the battery pack anode 714 is located at the lower end of the first contactor 81.
The second copper bar 72 is provided with a third power terminal access point 721, a fourth power terminal access point 722, a charging terminal negative electrode 723 and a battery pack negative electrode 724, wherein the third power terminal access point 723 is positioned between the fourth direct current contactor 84 and the second direct current contactor 82, the fourth power terminal access point 84 is positioned between the sixth direct current contactor 83 and the fourth direct current contactor 84, the charging terminal negative electrode 723 is positioned at the upper end of the sixth contactor 86, and the battery pack negative electrode 724 is positioned at the lower end of the shunt 10.
As shown in fig. 11, the power terminals 9 include a first power terminal positive electrode 91, a first power terminal negative electrode 92, a second power terminal positive electrode 93, and a second power terminal negative electrode 94, corresponding to each group of the dc output units.
The charging module comprises a first charging module and a second charging module;
The first charging module output anode is connected with the first power terminal anode 91, the first power terminal anode 91 is connected with the first power terminal access point 711, the first charging module output cathode is connected with the first power terminal cathode 92, and the first power terminal cathode 92 is connected with the third power terminal access point 721;
The output positive electrode of the second charging module is connected with the second power terminal positive electrode 93, the second power terminal positive electrode 93 is connected with the second power terminal access point 712, the output negative electrode of the second charging module is connected with the second power terminal negative electrode 94, and the second power terminal negative electrode 94 is connected with the fourth power terminal access point 722.
In the embodiment of the invention, the upper end of the copper bar is a charging terminal anode and cathode interface, the lower end of the copper bar is a battery pack anode and cathode interface, and the shunt 10 and the fuse 11 are connected in a power loop of the battery pack. The lower end of the copper bar can be used as the positive and negative electrode interface of the charging terminal, and the upper end of the copper bar can be used as the positive and negative electrode interface of the battery pack, and accordingly, the current divider 10 and the fuse 11 need to be adjusted to the power circuit where the positive and negative electrode interface of the battery pack is located.
In some embodiments of the present invention, the on-off of the dc contactor 8 is controlled by the controller 2. In other embodiments of the present invention, the controller 2 controls the on-off of the first contactor and the second contactor to realize the control of charging the battery pack, and the battery charger control board controls the on-off of the remaining contactors, as shown in fig. 12, which is a schematic diagram of the corresponding connection terminal 6, including the connection terminal including seven areas of X1, X2, X3, X4, X5, X6, X7 and two USB interfaces. The two USB interfaces are USB external interfaces of the two groups of direct current output units respectively and are used for upgrading the system and leading out charging information. The X1 area comprises a direct current output module power supply interface and an axial flow fan feedback signal interface, the power conversion charger supplies power for the direct current output module through the direct current output module power supply interface, and the controller 2 feeds back the axial flow fan state information to the power conversion charger control board through the axial flow fan feedback signal interface. The X2 and X3 areas include control and feedback signal interfaces of the third contactor 83, the fourth contactor 84, the fifth contactor 85, and the sixth contactor 86 of the two sets of dc output units, respectively. The X4 area comprises a communication interaction interface of the direct current output module, a battery pack, a charging terminal and a battery change charger control board, and specifically, the X4 area is a CAN bus interface. The X5 area and the X6 area respectively comprise two groups of battery pack control guide ports which are used for CAN interaction between the direct current output module and the battery pack, providing BMS auxiliary sources for the battery pack, waking up a power supply, and confirming connection between the direct current output module and the battery pack, wherein the battery pack connector temperature sampling CAN be customized according to battery packs and connectors with different requirements. The X7 area comprises charging CAN ports of two groups of direct current output units and is used for debugging.
The working principle of each group of direct current output units in the direct current output module of the battery-changing charger in the embodiment of the invention is as follows:
After the controller 2 receives the charging demands of the battery and the electric automobile through the signal terminal 6, the switching power supply 3 provides auxiliary power for the battery BMS, and the self-checking of the power supply loop is completed by controlling the direct current contactor 8. The power supply loop comprises a copper bar 7, a direct current contactor 8, a shunt 10 and a fuse 11. The specific method of self-checking is that an insulation detection circuit is integrated in the controller 2, and insulation resistance between the high-voltage direct current circuit and the ground is measured by controlling to close the first direct current contactor 81 and the second direct current contactor 82.
After the self-checking is finished, the direct current contactor 8 is closed to connect the battery side power output loop and the charging terminal power output loop. Each group of direct current output units comprises 6 direct current contactors, and the purpose of respectively charging the battery pack and the electric automobile is achieved by closing different contactors.
When the battery needs to be charged, the first contactor 81 and the second contactor 82 are closed, the battery pack charging loop is conducted, the first charging module is connected, and whether the third contactor and the fourth contactor are simultaneously closed or not is determined according to the power requirement, and the second charging module is connected to provide more charging power. The output of the charging module is subjected to charging of the battery through the power terminal 9, the direct current contactor 8, the current divider 10, the fuse 11 and the copper bar 7. The direct current electric energy meter 5 performs current sampling through the current divider 10 and voltage sampling on the direct current output loop to finish metering the battery side electric quantity data.
When the electric automobile is charged, the fifth contactor 85 and the sixth contactor 86 are closed, the charging terminal loop is conducted, the second charging module is connected, and whether the third contactor 83 and the fourth contactor 84 are simultaneously closed or not is determined according to the power requirement, and the first charging module is connected.
When a group of direct current output units has the charging requirement of the battery pack and the charging requirement of the electric automobile, the first contactor 81 and the second contactor 82 are closed, the charging loop of the battery pack is conducted, the fifth contactor 85 and the sixth contactor 86 are closed, the charging terminal loop is conducted, and the battery pack and the electric automobile are charged.
In the charging process, the axial flow fan 4 is started to drive air in the module to flow, so that the cooling of the power device is completed.
The other group of direct current output units works in the same way. When a plurality of direct current output modules are arranged in the battery changing machine, after the battery pack is connected to any group of direct current output units of a certain direct current output module, the group of direct current output units are connected with the battery pack signal terminal through the signal terminal 6, after the connection of a confirmation signal, the internal controller 2 of the module uploads the information of successful connection confirmation to the control board of the battery changing machine, then the control board of the battery changing machine controls the direct current output modules to start the group of direct current output units, self-checking is carried out, and charging is started after the self-checking is finished.
Fig. 13 and 14 show assembly diagrams of a plurality of dc output modules. When a plurality of direct current output modules are connected in parallel, the copper bars of the charging terminals above can be singly connected with the charging terminals, and the copper bars of the charging terminals of the modules can be connected in parallel to realize the parallel connection of the plurality of direct current output modules, and then the copper bars of the charging terminals of the modules are connected with the super-charging terminals to realize high-power output.
The embodiment of the invention also provides a battery charger, which comprises a plurality of battery charger direct current output modules. The battery charger comprises an alternating current inlet switch, an alternating current contactor, a surge protector, a charging module, a battery charger control board, an emergency stop button, a status indicator lamp and a system fan besides a direct current output module. The control board of the battery charger can control the start and stop of the direct current output module.
Fig. 15 is a schematic layout diagram of a battery charger according to some embodiments of the present invention. The upper row is a charging module, the lower row is a dc output module, and fig. 15 includes 6 dc output modules, and a total of 12 dc output units, which provide 12 paths of dc output. Fig. 1 is a prior art battery charger, also comprising 12 dc outputs. In fig. 1, a controller for dc output and a metering unit (shunt) are provided in layers. In FIG. 1, the front view angle of the battery charger is 1474mm wide and 2420mm high, and in FIG. 15, the front view angle of the battery charger is 1474mm wide and 1555mm high, and the two cabinets have the same depth. It can be seen that by modification of the embodiment of the present invention, the cabinet height is reduced by 864mm by about 36%. Besides the space is reduced, the whole design scheme of the battery-changing charging cabinet is simplified through the improvement of the embodiment of the invention, and each direct-current module is integrated in one shell, so that the whole layout in the cabinet is more orderly, and the maintenance difficulty and cost are reduced.
The invention has the advantages that the direct current output modules of the battery-changing charger are integrated in the shell, two groups of direct current output units are symmetrically arranged in each shell, the structure is compact, the integration level is high, the disassembly and the assembly are convenient, the subsequent maintenance and replacement are convenient, a single module supports two-way batteries and two-way electric vehicles to supplement energy simultaneously, and the utilization rate of the modules in different scenes is improved. The direct current output module of the battery charger can support upper end output and lower end output, a plurality of modules are supported to be simply and parallelly used for realizing high-power output, a corresponding number of modules can be configured according to different application scenes to meet station requirements, the design complexity of the battery charger cabinet is simplified, the space utilization rate is greatly improved, and the maintenance difficulty and cost are reduced.
The above description is only of embodiments of the present invention and should not be construed as limiting the scope of the present invention, and it should be understood that the present invention is not limited to the embodiments described above, but is intended to cover all modifications, equivalents, and alternatives known to those skilled in the art.

Claims (6)

1. The direct current output module of the battery-changing charger is characterized by comprising a shell, wherein two groups of direct current output units are symmetrically arranged in the shell along the depth direction, and each direct current output unit comprises a controller, a switching power supply, an axial flow fan, a direct current electric energy meter, a copper bar, a direct current contactor, a current divider and a fuse;
The signal terminal comprises a power supply and a communication terminal, and is connected with a switch power supply, a controller, a battery pack, a charging terminal and a battery-changing charger control board, and is used for providing an input power supply for the direct-current output module and providing communication interfaces with the battery pack, the charging terminal and the battery-changing charger control board for the controller;
the switching power supply is used for supplying power to the internal elements of the direct-current output module;
The axial flow fan is arranged close to one side wall of the shell and used for radiating heat of the direct current output module;
the direct current electric energy meter is connected with the current divider and the copper bar and is used for measuring the electricity consumption of a battery pack power loop in the direct current output module;
The charging module in the battery changing charger is connected with the power terminal, and the power terminal is connected with the direct current contactor, the current divider and the fuse through the copper bar and then connected with the battery pack or the charging terminal;
The controller is connected with the direct-current electric energy meter and the direct-current contactor, and is used for feeding back battery charging information, metering information of a power loop and state information inside the direct-current output module to the battery-changing machine control board, and carrying out power output allocation inside the direct-current output module by controlling the on-off of the direct-current contactor;
the shell comprises a first side wall, a second side wall, a third side wall and a fourth side wall, wherein the first side wall and the second side wall are respectively positioned at the top and the bottom of the shell, the copper bar is arranged along the height direction of the direct current output module, a through hole for the copper bar to pass through is formed in the position, opposite to the copper bar, of the first side wall and the second side wall, the third side wall is opposite to the axial flow fan, a heat dissipation hole is formed in the position, opposite to the axial flow fan, of the third side wall, and the signal terminal and the power terminal are arranged on the fourth side wall;
in the shell, the axial flow fan is arranged at a position close to the lower part of the third side wall, the switching power supply is arranged at one side of the axial flow fan away from the third side wall, the controller is arranged above the axial flow fan and the switching power supply, the direct current electric energy meter is arranged below the switching power supply, and the copper bar is arranged at one side of the controller and the switching power supply away from the third side wall;
The direct current contactor comprises a first direct current contactor, a second direct current contactor, a third direct current contactor, a fourth direct current contactor, a fifth direct current contactor and a sixth direct current contactor, wherein the copper bar comprises a first copper bar and a second copper bar, the first copper bar is connected with the fifth direct current contactor, the third direct current contactor, the fuse and the first direct current contactor from top to bottom, and the second copper bar is connected with the sixth direct current contactor, the fourth direct current contactor, the second direct current contactor and the shunt from top to bottom.
2. The battery charger dc output module of claim 1 wherein two sets of dc output units share the axial fan and the dc power meter.
3. The battery charger dc output module of claim 1 wherein the signal terminals power the switching power supply, the dc power meter, the switching power supply powers the controller, the axial fan, the dc contactor, and the switching power supply also powers the battery pack through the signal terminals.
4. The direct current output module of the battery changer according to claim 1, wherein a first power terminal access point, a second power terminal access point, a charging terminal anode and a battery pack anode are arranged on the first copper bar, wherein the first power terminal access point is positioned between the fuse and the third direct current contactor, the second power terminal access point is positioned between the fifth direct current contactor and the third direct current contactor, the charging terminal anode is positioned at the upper end of the fifth direct current contactor, and the battery pack anode is positioned at the lower end of the first direct current contactor;
The second copper bar is provided with a third power terminal access point, a fourth power terminal access point, a charging terminal negative electrode and a battery pack negative electrode, wherein the third power terminal access point is positioned between the fourth direct current contactor and the second direct current contactor, the fourth power terminal access point is positioned between the sixth direct current contactor and the fourth direct current contactor, the charging terminal negative electrode is positioned at the upper end of the sixth direct current contactor, and the battery pack negative electrode is positioned at the lower end of the current divider.
5. The battery charger dc output module of claim 4 wherein the power terminals comprise a first power terminal positive electrode, a first power terminal negative electrode, a second power terminal positive electrode, a second power terminal negative electrode;
the charging module comprises a first charging module and a second charging module;
The output positive electrode of the first charging module is connected with the positive electrode of the first power terminal, and the positive electrode of the first power terminal is connected with the first power terminal access point; the output cathode of the first charging module is connected with the cathode of the first power terminal, and the cathode of the first power terminal is connected with the access point of the third power terminal;
the second charging module output anode is connected with the second power terminal anode, the second power terminal anode is connected with the second power terminal access point, the second charging module output cathode is connected with the second power terminal cathode, and the second power terminal cathode is connected with the fourth power terminal access point.
6. A battery charger comprising a plurality of battery charger dc output modules as defined in any one of claims 1-5.
CN202411731879.7A 2024-11-29 2024-11-29 Direct-current output module of battery charger and battery charger Active CN119502737B (en)

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Publication number Priority date Publication date Assignee Title
CN104795877A (en) * 2015-05-08 2015-07-22 山东鲁能智能技术有限公司 Electric automobile integrated direct-current charger, system and method
CN111422087A (en) * 2020-04-30 2020-07-17 博众精工科技股份有限公司 Charger and charging and replacing station

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Publication number Priority date Publication date Assignee Title
CN106240396A (en) * 2016-10-09 2016-12-21 福建网能科技开发有限责任公司 One machine rush-harvesting and rush-planting electric automobile direct-current charging post
CN220865231U (en) * 2023-09-28 2024-04-30 南京能瑞电力科技有限公司 Direct current output device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104795877A (en) * 2015-05-08 2015-07-22 山东鲁能智能技术有限公司 Electric automobile integrated direct-current charger, system and method
CN111422087A (en) * 2020-04-30 2020-07-17 博众精工科技股份有限公司 Charger and charging and replacing station

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