CN215646328U - Charger power supply device for motor train unit storage battery charging system - Google Patents

Charger power supply device for motor train unit storage battery charging system Download PDF

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Publication number
CN215646328U
CN215646328U CN202121514867.0U CN202121514867U CN215646328U CN 215646328 U CN215646328 U CN 215646328U CN 202121514867 U CN202121514867 U CN 202121514867U CN 215646328 U CN215646328 U CN 215646328U
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charging
storage battery
output
power supply
machine
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CN202121514867.0U
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万海峰
傅宗俊
张步平
李齐龙
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Nanjing Zhizhuo Electronic Technology Co ltd
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Nanjing Zhizhuo Electronic Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model discloses a charger power supply device for a storage battery charging system of a motor train unit, which is structurally characterized in that an external input voltage U, V, W is respectively connected with two charging single-machine modules, the positive electrodes of the output ends of the two charging single-machine modules are respectively connected with the positive electrodes of two groups of storage battery packs and are in isolated connection through diodes, the negative electrodes of the output ends of the two charging single-machine modules are connected and are connected with the negative electrodes of the two groups of storage battery packs, and the charging current is fed back to a single machine through a charging current sensor to adjust the charging current of the storage battery. The utility model overcomes the defects of large volume, high cost, low efficiency, heavy weight and the like of a three-phase power frequency transformer, a direct current filter inductor and internal power devices such as a transformer, an inductor and a capacitor in a full-bridge rectification control circuit.

Description

Charger power supply device for motor train unit storage battery charging system
Technical Field
The utility model relates to the technical field of high-capacity storage battery charging, in particular to a charger power supply device for a storage battery charging system of a motor train unit.
Background
With the rapid development of the high-speed rail industry in China, the demand of the storage battery for the high-speed rail motor train unit train will suddenly increase in the coming years. The rail transit train has extremely high requirements on the storage battery, and the storage battery has the characteristics of small internal resistance, good high and low temperature performance, high starting power, large shell liquid storage chamber, convenience in use and maintenance, overcharge and overdischarge resistance, long service life, no corrosion, high flame retardance, high safety and reliability and the like. The method has important practical significance for developing the technical principle of the storage battery for the high-speed rail motor train unit train and the key technology for improving the electrical property of the storage battery.
In the rail transit industry, the design of a power supply device of a storage battery charger is mostly a power frequency power supply and is realized through three-phase full-bridge rectification control. The power frequency transformer, the direct current filter inductor, the filter capacitor, the rectifier bridge and other electric devices used in the circuit are large in size, and have the defects of high purchasing and production cost, low product operation efficiency, heavy weight, large size and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a charger power supply device for a storage battery charging system of a motor train unit, which aims to solve the problems in the background technology.
In order to solve the technical problems, the utility model provides the following technical scheme: a charger power supply device for a storage battery charging system of a motor train unit comprises an external input three-phase power U, V, W and two charging single-machine modules, wherein the external input three-phase power U, V, W is respectively connected with the two charging single-machine modules, the positive poles of the output ends of the two charging single-machine modules are respectively connected with the positive poles of two groups of storage battery packs, the negative poles of the output ends of the two charging single-machine modules are connected, and the negative poles of the output ends of the two charging single-machine modules are connected with the negative poles of the two groups of storage battery packs; the output ends of the two single charging unit modules are connected in parallel through output isolation diodes, the monitoring unit is in communication connection with the two single charging unit modules through a Controller Area Network (CAN), a charging current sensor is connected between the storage battery pack and the single charging unit modules, and the output end of the storage battery pack is connected with an output fuse.
Furthermore, the external input three-phase power U, V, W is connected with the input magnetic ring between the two single charging units respectively, so that the EMC performance of the charger can be improved, the input three-phase inductor is connected between the input magnetic ring and the two single charging units, so that the working efficiency of the charger can be improved, and the three-phase inductor is connected with the two single charging units through the pre-charging resistor, so that the capacitor can be prevented from being electrified instantly, the current is large, and the device is prevented from being damaged.
Furthermore, the charging single-machine module is connected with the storage battery pack through an output filter capacitor, and the output EMC performance can be guaranteed.
Furthermore, the phase-shifted full-bridge soft switch control technology is adopted in the charging single-machine module, so that the output efficiency of the charger is effectively improved.
Compared with the prior art, the utility model has the following beneficial effects:
1. because the phase-shifted full-bridge soft switching power supply technology is adopted, the frequency can be higher, the volumes of internal power devices such as a direct current inductor, a high-frequency transformer and the like are effectively reduced, the volume of the whole charger is reduced, the weight is further reduced, the cost is reduced, and the miniaturization and the light weight are realized; the monitoring unit controls the output of the charging single-machine module through CAN communication by adopting a mode that two charging single-machine modules work in parallel, and the output power of each charging module CAN be ensured to be consistent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of the principles of the present invention;
in the figure: 1. inputting a magnetic ring; 2. inputting a three-phase inductor; 3. a pre-charge resistor; 4. a charging stand-alone module; 5. an output filter capacitor; 6. a charging current sensor; 7. a battery pack; 8. an output isolation diode; 9. an output fuse; 10. and a monitoring unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a charger power supply device for a storage battery charging system of a motor train unit is externally input with three-phase alternating current U, V, W, firstly, high-frequency filtering processing is carried out through an input magnetic ring 1, and the EMC performance of the charger is improved; then, the input three-phase inductor 2 is used for protecting input overcurrent, and meanwhile, the power factor of the charger can be adjusted, so that the working efficiency of the charger is improved; the intermediate-stage capacitor in the single machine is pre-charged through the pre-charging resistor 3, so that the capacitor is prevented from being instantly electrified, the current is large, and the device is prevented from being damaged; the charging single-machine module 4 rectifies input three-phase AC380V electricity into DC600V high voltage, then converts the DC600V into high-frequency direct current through a phase-shifted full-bridge soft switch, performs voltage reduction and isolation through an internal high-frequency transformer, and is internally provided with a direct-current filter inductor for output filtering; the anodes of the two single-machine modules are respectively connected with two groups of storage batteries 7, the cathodes of the two single-machine modules are directly connected and are connected with the cathodes of the storage batteries, the two groups of storage batteries are respectively charged, and the charging current sensor 6 is used for detecting the charging current and controlling the current limiting; secondary filtering is carried out between the output positive electrode and the output negative electrode of the two groups of single-machine modules through an output filtering capacitor 5, so that the EMC performance of output is ensured; the anodes of the two groups of charging single-machine modules 4 are connected after being isolated by the output isolation diode 8 to supply power for a rear-stage load; an output fuse 9 is designed between the output of the charger and the load, and when the rear-stage load is in overcurrent and short circuit, the protection is carried out in time; the monitoring unit 10 is controlled by the CAN communication mode according to the internal algorithm by the current feedback collected by the charging current sensor 6.
The implementation mode is specifically as follows: when the single-machine charging module is used, the single-machine charging module 4, the charging current sensor 6, the storage battery pack 7, the output isolation diode 8, the output fuse 9 and the monitoring unit 10 are arranged, and when AC380V is input, the monitoring unit 10 gives starting signals of the two single-machine charging modules 4 after detecting that the input voltage meets the working requirement; the two groups of charging single-machine modules 4 start to work normally, when the two groups of charging single-machine modules 4 charge the two groups of storage battery packs 7, the monitoring unit 10 judges whether the current meets the requirements according to the data of the charging current sensors 6 of the storage battery packs 7, and further adjusts the output current value; the output anodes of the two groups of charging single-machine modules 4 are connected in parallel through an output isolation diode 8 for output, and power is provided for a load at the later stage; the two groups of charging single-machine modules 4 are connected in parallel for output, when the output current of one group of single-machine modules is overlarge, the output voltage can be actively reduced, the output current can also be reduced, and the output current of the other group of single-machine modules is increased, so that the balance of the output currents of the two groups of charging single-machine modules 4 is ensured; the output end is provided with an output fuse 9 for protecting a charger and a rear-stage load; when the charger fails or an external load is short-circuited, a large output current can be generated, the output fuse 9 exceeds the rated passing current value of the output fuse, the output fuse is automatically fused, and a power supply loop is cut off; the two groups of charging single-machine modules 4 adopt an advanced phase-shifted full-bridge soft switching control technology, the frequency reaches 15KHz, the soft switching greatly reduces the switching loss of a power conversion device IGBT, and the output efficiency of a charger is effectively improved; the rated power of the charger is 60kW, the output conversion efficiency is as high as 92%, the volume of an internal high-frequency transformer and the volume of a radiator are reduced, the weight is reduced, and the cost is reduced; the monitoring unit 10 adopts an advanced ARM chip as a main control chip, and the processing speed is high; an MVB board card and an Ethernet board card are designed inside and respectively responsible for MVB communication and Ethernet communication of the charger; the temperature acquisition board is arranged in the radiator and respectively acquires the temperature of the radiator and the temperature of the external environment; and fault judgment is carried out through set logic, and fault judgment such as overvoltage and undervoltage input, short circuit output, overvoltage output, overtemperature of a radiator and the like is carried out.
The working principle of the utility model is as follows:
referring to the attached drawing 1 of the specification, by arranging the charging single-machine module 4, the charging current sensor 6, the storage battery 7, the output isolation diode 8, the output fuse 9 and the monitoring unit 10, the frequency can be higher due to the adoption of the phase-shifted full-bridge soft switching power supply technology, the volumes of internal direct current inductors, high-frequency transformers and other electric devices are effectively reduced, the volume of the whole charger is reduced, the weight is further reduced, the cost is reduced, and the miniaturization and the light weight are realized; the two charging single-machine modules 4 work in parallel, and the monitoring unit 10 controls the output of the charging single-machine modules through CAN communication, so that the output power of each charging module CAN be ensured to be consistent.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a machine power supply unit that charges for EMUs battery charging system, includes external input three-phase electricity U, V, W and two single module (4) of charging, its characterized in that: the external input three-phase power U, V, W is respectively connected with the two charging single-machine modules (4), the positive electrodes of the output ends of the two charging single-machine modules (4) are respectively connected with the positive electrodes of the two groups of storage battery packs (7), the negative electrodes of the output ends of the two charging single-machine modules (4) are connected, and the negative electrodes of the output ends of the two charging single-machine modules (4) are connected with the negative electrodes of the two groups of storage battery packs (7); two it connects in parallel through output isolation diode (8) to charge unit module (4) output positive pole, monitoring unit (10) pass through CAN and two it connects to charge unit module (4) communication, storage battery (7) with it is connected with charging current sensor (6) to charge between unit module (4), storage battery (7) output is connected with output fuse (9).
2. The charger power supply device for the storage battery charging system of the motor train unit according to claim 1, characterized in that: and an input magnetic ring (1) is connected between the external input three-phase power U, V, W and the two charging single-machine modules (4) respectively.
3. The charger power supply device for the storage battery charging system of the motor train unit according to claim 2, characterized in that: an input three-phase inductor (2) is connected between the input magnetic ring (1) and the two single charging modules (4).
4. The charger power supply device for the storage battery charging system of the motor train unit according to claim 3, characterized in that: and the three-phase inductor (2) is connected with the two charging single-machine modules (4) through a pre-charging resistor (3).
5. The charger power supply device for the storage battery charging system of the motor train unit according to claim 1, characterized in that: and the charging single-machine module (4) is connected with the storage battery pack (7) through an output filter capacitor (5).
6. The charger power supply device for the storage battery charging system of the motor train unit according to claim 1, characterized in that: the charging single-machine module (4) adopts a phase-shifted full-bridge soft switch control technology.
CN202121514867.0U 2021-07-05 2021-07-05 Charger power supply device for motor train unit storage battery charging system Active CN215646328U (en)

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Application Number Priority Date Filing Date Title
CN202121514867.0U CN215646328U (en) 2021-07-05 2021-07-05 Charger power supply device for motor train unit storage battery charging system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121514867.0U CN215646328U (en) 2021-07-05 2021-07-05 Charger power supply device for motor train unit storage battery charging system

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CN215646328U true CN215646328U (en) 2022-01-25

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CN202121514867.0U Active CN215646328U (en) 2021-07-05 2021-07-05 Charger power supply device for motor train unit storage battery charging system

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