High-voltage direct-current charging system
阅读说明：本技术 一种高压直流充电系统 (High-voltage direct-current charging system ) 是由 季全亮 王国村 于 2019-11-01 设计创作，主要内容包括：本发明适用于充电设备技术领域,提供了一种高压直流充电系统,包括充电单元、电量分配调控单元和充电管理单元；充电单元包括直流操作终端和充电模块,充电模块包括与高压电连接的多磁路变压器,多磁路变压器通过整流器连接若干个DC/DC变换器,每个DC/DC变换器均对应连接一个直流操作终端。借此,本发明结构简单,充电效率高,生产成本低,环境适应性强,能够满足多标准、多车型的充电需求,且充电过程中的可靠性高。(The invention is suitable for the technical field of charging equipment, and provides a high-voltage direct-current charging system which comprises a charging unit, an electric quantity distribution regulation and control unit and a charging management unit; the charging unit comprises a direct current operating terminal and a charging module, the charging module comprises a multi-magnetic circuit transformer electrically connected with high voltage, the multi-magnetic circuit transformer is connected with a plurality of DC/DC converters through a rectifier, and each DC/DC converter is correspondingly connected with one direct current operating terminal. Therefore, the charging device is simple in structure, high in charging efficiency, low in production cost, strong in environmental adaptability, capable of meeting the charging requirements of multiple standards and multiple vehicle types, and high in reliability in the charging process.)
1. A high-voltage direct-current charging system is characterized by comprising a charging unit, an electric quantity distribution regulation and control unit and a charging management unit;
the charging unit comprises a direct current operating terminal and a charging module, the charging module comprises a multi-magnetic circuit transformer electrically connected with high voltage, the multi-magnetic circuit transformer is connected with a plurality of DC/DC converters through a rectifier, and each DC/DC converter is correspondingly connected with one direct current operating terminal;
the electric quantity distribution regulation and control unit comprises a start-stop monitor arranged on the direct current operation terminal, a charging power calculator and an electric quantity regulator;
the charging management unit comprises a data collector arranged on the direct current operation terminal, a database manager and a data processor.
2. The HVDC charging system of claim 1, wherein the high voltage power is 10KV AC power.
3. A hvdc charging system according to claim 2, characterized in that said multi-circuit transformer has a capacity of 630 KVA.
4. The HVDC charging system of claim 3, wherein the DC/DC converter adopts a BUCK circuit to step down the power transmitted by the multi-magnetic circuit transformer.
5. A HVDC charging system according to claim 4, in which the number of DC/DC converters is 24, and each DC/DC converter outputs a capacitance of 30 KW.
6. The HVDC charging system of claim 5, wherein the HVDC charging system has a DC voltage output in the range of 50-1000 VDC.
7. The HVDC charging system of claim 6, wherein the charging module is arranged inside a charging box, and the DC operation terminal is embedded on the outer wall of the charging box.
8. The HVDC charging system of claim 6, wherein the DC operation terminal comprises a display screen, a card swiping slot, an emergency stop button and a charging socket.
9. A method for regulating and controlling the electric quantity distribution of the high-voltage direct current charging system of any one of claims 1 to 8 comprises the following steps:
a1, counting the working and closing conditions of each DC operation terminal by using the start-stop monitor, and transmitting the number of the DC operation terminals in working to the charging power calculator;
a2, the charging power calculator counts the number of the working direct current operation terminals and the total power load, judges whether the total power load exceeds the capacity value of the multi-magnetic circuit transformer, and transmits the judgment result to the electric quantity controller;
a3 when the total electric load does not exceed the capacity value of the multi-magnetic circuit transformer, the electric quantity regulator distributes the output power of each DC operation terminal normally; and when the total power load exceeds the capacity value of the multi-magnetic circuit transformer, the electric quantity regulator reduces the output power of each direct current operation terminal according to a certain proportion according to the excess quantity of the total power load.
10. A method for charging management of the high-voltage direct current charging system according to any one of claims 1 to 8, comprising the following steps:
b1, the data collector collects information such as transaction fee information, working and closing conditions, electricity price and the like on the direct current operation terminal, and working conditions of the multi-magnetic circuit transformer, the rectifier, the DC/DC converter and the like, and transmits the collected data to the database manager;
b2 the data processor classifies and counts the collected data and transmits the classification result to the database manager;
b3 the database manager analyzes each data, realizes monitoring the real-time working state of the multi-magnetic circuit transformer, rectifier, DC/DC converter and other equipment, and sends out warning to the fault equipment.
Technical Field
The invention relates to the technical field of charging equipment, in particular to a high-voltage direct-current charging system.
Background
As the largest global new energy automobile market, China plans to popularize 500 thousands of new energy automobiles in 2020, plans to build 480 thousands of charging piles to be matched with the new energy automobiles, and with the rapid increase of the application of the new energy automobiles in China, the construction of new energy automobile charging facilities becomes an urgent demand at present.
With the popularization of new energy vehicles and the increase of the capacity of vehicle batteries, more and more vehicle owners and operators begin to tend to a fast charging mode, and a high-power direct-current charging pile tends to become the mainstream.
The construction of traditional electric pile/station of filling usually regards box transformer with to fill electric pile and fills electric pile as two major components parts, consequently when the charging station construction, along with the increase of filling electric pile quantity and the increase of power demand, inevitably involves electric power increase-volume and the purchase of transformer.
In addition, the construction of the conventional charging station/pile has the following problems:
1. the investment cost is high: traditional charging station construction, the interior construction of station is numerous and diverse, including outdoor case becomes, fills electric pile, cable, switch and other auxiliary materials etc. in the construction process, not only need invest in these equipment itself, still need to cover steps such as equipment fixing, antithetical couplet transfers, construction, and whole input is high.
2. The operation efficiency is low: because the interior construction of station is complicated, the link is many, fills electric pile, case becomes, whole loss such as cable is great, and whole station comprehensive efficiency is lower, and efficiency is about 91 ~ 92%.
3. The failure rate is high: charging station/stake is mostly outdoor service environment, because outdoor environment is abominable, and the temperature variation scope is great, and phenomenons such as condensation, salt fog, dust are more, and what most charging pile adopted is the forced air cooling module, and the phenomenon is comparatively serious is piled up to the dust, will break down after 2 years usually, leads to the later stage operation maintenance cost very high.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a high voltage dc charging system, which has a simple structure, high charging efficiency, low production cost, and strong environmental adaptability, and can meet the charging requirements of multiple standards and multiple vehicle types, and has high reliability during charging.
In order to achieve the above object, the present invention provides a high voltage dc charging system, which includes a charging unit, an electric quantity distribution regulating unit and a charging management unit;
the charging unit comprises a direct current operating terminal and a charging module, the charging module comprises a multi-magnetic circuit transformer electrically connected with high voltage, the multi-magnetic circuit transformer is connected with a plurality of DC/DC converters through a rectifier, and each DC/DC converter is correspondingly connected with one direct current operating terminal;
the electric quantity distribution regulation and control unit comprises a start-stop monitor arranged on the direct current operation terminal, a charging power calculator and an electric quantity regulator;
the charging management unit comprises a data collector arranged on the direct current operation terminal, a database manager and a data processor.
According to the high-voltage direct current charging system, the high voltage is 10KV alternating current.
According to the high-voltage direct-current charging system, the capacitance of the multi-magnetic circuit transformer is 630 KVA.
According to the high-voltage direct-current charging system, the DC/DC converter adopts a BUCK circuit to perform voltage reduction processing on the power transmitted by the multi-magnetic circuit transformer.
According to the high-voltage direct current charging system, the number of the DC/DC converters is 24, and the output capacitance of each DC/DC converter is 30 KW.
According to the high-voltage direct current charging system, the direct current voltage output range of the high-voltage direct current charging system is 50-1000 VDC.
According to the high-voltage direct-current charging system, the charging module is arranged inside the charging box, and the direct-current operating terminal is embedded on the outer wall of the charging box.
According to the high-voltage direct-current charging system, the direct-current operation terminal comprises a display screen, a card swiping slot, an emergency stop button and a charging socket.
According to the high-voltage direct-current charging system, the invention also provides a method for regulating and controlling the electric quantity distribution of the high-voltage direct-current charging system, which comprises the following steps:
a1, counting the working and closing conditions of each DC operation terminal by using the start-stop monitor, and transmitting the number of the DC operation terminals in working to the charging power calculator;
a2, the charging power calculator counts the number of the working direct current operation terminals and the total power load, judges whether the total power load exceeds the capacity value of the multi-magnetic circuit transformer, and transmits the judgment result to the electric quantity controller;
a3 when the total electric load does not exceed the capacity value of the multi-magnetic circuit transformer, the electric quantity regulator distributes the output power of each DC operation terminal normally; and when the total power load exceeds the capacity value of the multi-magnetic circuit transformer, the electric quantity regulator reduces the output power of each direct current operation terminal according to a certain proportion according to the excess quantity of the total power load.
According to the high-voltage direct-current charging system, the invention also provides a method for charging management of the high-voltage direct-current charging system, which comprises the following steps:
b1, the data collector collects information such as transaction fee information, working and closing conditions, electricity price and the like on the direct current operation terminal, and working conditions of the multi-magnetic circuit transformer, the rectifier, the DC/DC converter and the like, and transmits the collected data to the database manager;
b2 the data processor classifies and counts the collected data and transmits the classification result to the database manager;
b3 the database manager analyzes each data, realizes monitoring the real-time working state of the multi-magnetic circuit transformer, rectifier, DC/DC converter and other equipment, and sends out warning to the fault equipment.
The invention aims to provide a high-voltage direct-current charging system, which is characterized in that a charging unit, an electric quantity distribution regulation and control unit and a charging management unit are arranged; the charging unit comprises a direct current operating terminal and a charging module, the charging module comprises a multi-magnetic circuit transformer electrically connected with high voltage, the multi-magnetic circuit transformer is connected with a plurality of DC/DC converters through a rectifier, and each DC/DC converter is correspondingly connected with one direct current operating terminal; the multi-magnetic circuit transformer can save the loss of a primary PFC rectifying circuit; the DC/DC converter adopts a BUCK circuit mode, so that the loss of an LLC circuit is saved; the high-voltage direct-current charging system is modularized and standardized through the arrangement of the multi-magnetic circuit transformer and the DC/DC converter, and is simple in structure, low in failure rate and high in power supply efficiency; the electric quantity distribution regulation and control unit can carry out orderly distribution and comprehensive regulation and control on the electric quantity, and the charging management unit can carry out charging management on the direct current charging system, so that the charging stability, safety and high efficiency of the system are improved, and a user can charge more efficiently and conveniently. In conclusion, the beneficial effects of the invention are as follows: the system has the advantages of simple structure, high charging efficiency, low production cost and strong environmental adaptability, can meet the charging requirements of multiple standards and multiple vehicle types, and has high reliability in the charging process.
Drawings
FIG. 1 is a schematic diagram of the high voltage DC charging of the present invention;
FIG. 2 is a schematic diagram of a front view of the charging box of the present invention;
FIG. 3 is a schematic view of a longitudinal section of the charging box according to the present invention;
in the figure, 1-dc operation terminal, 2-charging module, 3-charging box.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a high-voltage direct-current charging system which comprises a charging unit, an electric quantity distribution regulation and control unit and a charging management unit.
The charging unit comprises a direct
The electric quantity distribution regulation and control unit comprises a start-stop monitor arranged on the direct
The charging management unit comprises a data collector arranged on the direct
The multi-magnetic circuit transformer transmits energy through a plurality of magnetic circuits, and materials are effectively utilized; the multi-magnetic circuit transformer of the invention adopts a direct diode rectification mode and a passive filtering mode, saves the electric loss of a primary PFC rectification circuit, and has the electric energy transfer efficiency of about 98.5 percent which is more than 1 percent higher than that of the traditional transformer. The thickness of the multi-magnetic circuit transformer is 360-440 mm, the thickness of the multi-magnetic circuit transformer is only 1/3 or 1/4 of the traditional transformer, and the occupied space is small; the working temperature of the transformer is-20 to 50 ℃, and the working temperature can be reduced by more than 20 ℃ under the same state; the resistance of the winding can be reduced by 20%, and the heat loss of the winding is reduced by 40%; in the invention, the capacitance of the multi-magnetic circuit transformer is 630KVA, and the high voltage electricity is 10KV alternating current.
The DC/DC converter adopts a BUCK circuit, so that the loss of an LLC circuit is saved, the circuit form of the high-voltage direct-current charging system is more direct, and the power supply efficiency is improved; the DC/DC converter performs voltage reduction processing on the power supply of the multi-magnetic circuit transformer, and the voltage output range is enlarged, the direct-current voltage output range of the high-voltage direct-current charging system is 50-1000 VDC, constant power output can be realized, and the charging requirements of multiple standards and multiple vehicle types can be met. In the invention, the number of the DC/DC converters is 24, and the output capacitance of each DC/DC converter is 30 KW.
The setting of
In the high-voltage direct-current charging system, the components are simple, the integration level and the deployment flexibility are high, each component adopts a standardized design and is integrated in an outdoor container, and the expansion and the dynamic growth can be realized as required. The cooling of equipment in the system can adopt various modes of direct cooling, water cooling and isolated air cooling, internal elements in the system are not in direct contact with air, dust accumulation is not easy to occur, the capacity of the elements in outdoor complex environments such as salt mist resistance, condensation resistance and the like is improved, the running stability of the equipment is improved, and the failure rate is reduced. The invention can provide charging service for 24 new energy vehicles at the same time, and the output capacity of each path is 30 KW.
The invention is provided with a plurality of direct
a1, counting the working and closing conditions of each direct
a2 charging power calculator counts the number of working
a3 when the total electric load does not exceed the capacity value of the multi-magnetic circuit transformer, the electric quantity regulator distributes the output power of each direct
Certainly, in order to better perform orderly distribution and comprehensive regulation and control on the electric quantity, the electric quantity of the high-voltage direct-current charging system can be macroscopically regulated, and the regulation method comprises the following steps:
1. on the premise of meeting the requirement of charging time, the staff can adjust the charging time, so that the charging is concentrated in the off-peak period of the electricity price as far as possible, the off-peak electricity price is preferentially utilized for charging, and the electricity consumption expense is reduced while the power supply pressure of a power grid is reduced.
2. The user can reserve the specific moment when charging begins according to actual need, selects the most favorable price time interval for charging, and saves the charging cost.
3. The staff can arrange charging or high-power charging in advance according to the priority (bid amount, card opening amount and the like) of the user.
4. According to the three-phase balance degree of the power grid, one phase with relatively small load can be charged with high power, so that better power grid balance is achieved.
In order to better perform charging management on the high-voltage direct-current charging system, the invention also provides a charging management method, which comprises the following steps:
the B1 data acquisition unit acquires information such as transaction fee information, working and closing conditions, electricity price and the like on the direct
b2 data processor classifies and counts the collected data, and transmits the classification result to database manager;
b3 database manager analyzes each data, realizes monitoring real-time working state of multi-magnetic circuit transformer, rectifier, DC/DC converter and other equipment, and sends out warning to fault equipment; the database manager can also manage and output information such as the increase and decrease range of the electricity price, the working condition of the direct
The charging management terminal of the high-voltage direct-current charging system can be set as a computer terminal, so that system management personnel can conveniently perform statistical analysis, inquiry, management, printing related reports, setting template management, planning tasks and the like, and can also be set as mobile phone APP software, so that charging users can conveniently realize all-around charging services of inquiry, navigation, charging, reservation, mobile payment and the like of a charging station.
The charging process of the electric automobile is the process of electric energy transfer, but not the process of electric energy consumption, and the more the transformation links of a power grid and a power utilization terminal are, the larger the generated non-electric energy consumption is, so that the waste of electric energy is caused. The high-voltage direct-current charging system provided by the invention reduces the voltage conversion link and improves the efficiency of electric energy conversion, the overall power supply efficiency of the high-voltage direct-current charging system can reach 95%, and compared with a traditional charging station/pile, the high-voltage direct-current charging system is improved by 4-5%. In addition, the high-voltage direct-current charging system simplifies the equipment types and the circuit structure, and reduces the production cost, and compared with the prior art, the high-voltage direct-current charging system has the advantages that the equipment investment can be saved by 30% and the construction investment can be saved by 20% through statistics.
In summary, the charging unit, the electric quantity distribution regulation unit and the charging management unit are arranged; the charging unit comprises a direct current operating terminal and a charging module, the charging module comprises a multi-magnetic circuit transformer electrically connected with high voltage, the multi-magnetic circuit transformer is connected with a plurality of DC/DC converters through a rectifier, and each DC/DC converter is correspondingly connected with one direct current operating terminal; the multi-magnetic circuit transformer can save the loss of a primary PFC rectifying circuit; the DC/DC converter adopts a BUCK circuit mode, so that the loss of an LLC circuit is saved; the high-voltage direct-current charging system is modularized and standardized through the arrangement of the multi-magnetic circuit transformer and the DC/DC converter, and is simple in structure, low in failure rate and high in power supply efficiency; the electric quantity distribution regulation and control unit can carry out orderly distribution and comprehensive regulation and control on the electric quantity, and the charging management unit can carry out charging management on the direct current charging system, so that the charging stability, safety and high efficiency of the system are improved, and a user can charge more efficiently and conveniently. In conclusion, the beneficial effects of the invention are as follows: the system has the advantages of simple structure, high charging efficiency, low production cost and strong environmental adaptability, can meet the charging requirements of multiple standards and multiple vehicle types, and has high reliability in the charging process.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
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