Power supply system and intelligent power supply method of double-gun direct-current power supply machines
阅读说明：本技术 一种双枪直流供电机的供电系统及智能供电方法 (Power supply system and intelligent power supply method of double-gun direct-current power supply machines ) 是由 陆孙金 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种双枪直流供电机的供电系统及智能供电方法,供电系统包括供电主线、多个充电模块、多个继电器、第一充电枪、第二充电枪以及控制器；供电主线包括正极主线以及负极主线；正、负极主线的两端分别连接第一充电枪与第二充电枪的正、负极；所有的继电器成对串设在供电主线上；每相邻两对继电器之间设有一充电模块,充电模块的正、负极输出端分别连接正、负极主线；所有的继电器均电连接控制器。本发明的双枪直流供电机的供电系统及智能供电方法通过巧妙的继电器与充电模块的布局方式,使得控制器只需控制某一对或两对继电器断开即可实现将充电模块分配给两个充电枪,且供电方法通过获取充电对象的充电需求可实现充电模块的按需分配。(The invention discloses a power supply system and an intelligent power supply method of a double-gun direct-current power supply machine, wherein the power supply system comprises a power supply main line, a plurality of charging modules, a plurality of relays, a th charging gun, a second charging gun and a controller, the power supply main line comprises an anode main line and a cathode main line, two ends of the anode main line and the cathode main line are respectively connected with an anode and a cathode of a th charging gun and the second charging gun, all the relays are connected on the power supply main line in pairs in series, a charging module is arranged between every two adjacent pairs of relays, the anode output end and the cathode output end of the charging module are respectively connected with the anode main line and the cathode main line, and all the relays are electrically connected with the controller.)
The power supply system of the double-gun direct-current power supply machine is characterized by comprising a power supply main line, a plurality of charging modules, a plurality of relays, a th charging gun, a second charging gun and a controller;
the power supply main line comprises an anode main line and a cathode main line, wherein two ends of the anode main line are respectively connected with the charging gun and the anode of the second charging gun;
the relays are connected in series in pairs on the power supply main line, relays in each pair of relays are arranged on the positive main line, and relays are arranged on the negative main line, a charging module is arranged between every two adjacent pairs of relays, and the positive output end and the negative output end of the charging module are respectively connected with the positive main line and the negative main line;
all the relays are electrically connected with the controller.
2. The power supply system of a dual-gun dc power supply machine according to claim 1, wherein the output power of the charging module is 20 KW; the number of the charging modules is 6, and the number of the relays is 14.
The power supply method of the double-gun direct current power supply machine according to claim 3 or , wherein the method is applied to the controller of the power supply system of the double-gun direct current power supply machine according to claim 1 or 2, and the method comprises a module allocation process, and the module allocation process comprises:
respectively acquiring the charging requirements of an th charging gun and a second charging gun;
obtaining the number of charging modules corresponding to th charging gun and second charging gun according to the charging requirement;
and controlling the on-off of each relay so that a corresponding number of charging modules supply power to the th charging gun and the second charging gun respectively.
4. The power supply method for the double-gun DC power supply machine according to claim 3, wherein the separately acquiring the charging requirements of the th charging gun and the second charging gun comprises:
and respectively communicating with the battery management systems BMS of the automobiles to be charged corresponding to the charging guns to obtain the charging power information required by the automobiles to be charged.
5. The power supply method for the double-gun direct current power supply machine according to claim 4, wherein the obtaining the number of the charging modules corresponding to the th charging gun and the second charging gun according to the charging requirement comprises:
judging whether the total charging power of the two charging requirements exceeds the maximum charging power;
if not, respectively calculating the number of the charging modules required by each charging demand according to the charging demand;
and if the charging power exceeds the preset charging power, distributing the charging modules according to the ratio of the charging power corresponding to the two charging demands.
6. The power supply method for the double-gun direct current power supply machine according to claim 3, wherein the controller executes the module allocation process cyclically at a preset frequency.
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to a power supply system and an intelligent power supply method of double-gun direct-current power supply machines.
Background
Most of the existing high-power direct-current chargers are composed of a charging control system and a power module, the power module mostly uses 15KW or 20KW power grade as a unit, for example, 120KW direct-current chargers can be composed of 8 15KW modules or 6 20KW modules which output in parallel, most of the direct-current double-gun chargers in the current market output distribution modes are charged in an average power distribution mode that 6 high-voltage relays are adopted to evenly divide the modules into two groups, a charging gun group A and a charging gun group B attract an intermediate high-voltage relay to pull the two groups to output in parallel when high-power charging is needed, so that the purpose of high-power output is achieved, as shown in FIG. 1;
for example, a 120KW dc charger with two guns adopts a common average power distribution charging mode, namely when only guns are charged, the maximum power of a single gun can reach 120KW, when two guns are working simultaneously, the average power distributed by the two guns is 60KW, the power distribution is fixed to a fixed order , as is well known, the charging voltage and current requirements of an electric vehicle are controlled by the BMS at the vehicle end, the charging voltage and current requirements from the BMS are changed along with the charging time and the saturation degree of the battery, the voltage and current required by the BMS at the later stage of charging are smaller and smaller, most of the batteries need only 10-20KW of charging power for floating charging at the later stage, and if the single gun is 60KW, the remaining 40KW is in an occupied standby state, the charging utilization rate is low, resources are easily caused, and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a power supply system and an intelligent power supply method of a double-gun direct-current power supply machine, wherein the power supply system is high in utilization rate of charging modules, small in relay number and convenient to control.
In order to achieve the purpose, the power supply system of the double-gun direct-current power supply machine comprises a power supply main line, a plurality of charging modules, a plurality of relays, an th charging gun, a second charging gun and a controller;
the power supply main line comprises an anode main line and a cathode main line, wherein two ends of the anode main line are respectively connected with the charging gun and the anode of the second charging gun;
the relays are connected in series in pairs on the power supply main line, relays in each pair of relays are arranged on the positive main line, and relays are arranged on the negative main line, a charging module is arranged between every two adjacent pairs of relays, and the positive output end and the negative output end of the charging module are respectively connected with the positive main line and the negative main line;
all the relays are electrically connected with the controller.
, the output power of the charging modules is 20KW, the number of the charging modules is 6, and the number of the relays is 14.
A power supply method of a double-gun DC power supply machine, which is applied to a controller of the power supply system of the double-gun DC power supply machine, the method comprises a module distribution process, and the module distribution process comprises:
respectively acquiring the charging requirements of an th charging gun and a second charging gun;
obtaining the number of charging modules corresponding to th charging gun and second charging gun according to the charging requirement;
and controlling the on-off of each relay so that a corresponding number of charging modules supply power to the th charging gun and the second charging gun respectively.
, the obtaining the charging requirements of the th charging gun and the second charging gun respectively comprises:
and respectively communicating with the battery management systems BMS of the automobiles to be charged corresponding to the charging guns to obtain the charging power information required by the automobiles to be charged.
, the obtaining the number of charging modules corresponding to the th and second charging guns according to the charging requirement comprises:
judging whether the total charging power of the two charging requirements exceeds the maximum charging power;
if not, respectively calculating the number of the charging modules required by each charging demand according to the charging demand;
and if the charging power exceeds the preset charging power, distributing the charging modules according to the ratio of the charging power corresponding to the two charging demands.
, the controller executes the module allocation process according to preset frequency cycle.
The power supply system and the intelligent power supply method of the double-gun direct-current power supply machine have the advantages that the charging module can be distributed to the two charging guns by the controller only by controlling the pairs or two pairs of relays to be disconnected through a smart layout mode of the relays and the charging modules, and the power supply method can realize the distribution of the charging modules as required by acquiring the charging requirements of the charging objects.
Drawings
FIG. 1 is a power supply system structure of a conventional common DC charger;
FIG. 2 is a power supply system composition structure of a matrix distribution mode DC double-gun charger;
FIG. 3 is a block diagram of the power supply system of the dual-gun DC power supply of the present invention;
fig. 4 is a schematic flow chart of a power supply method of the double-gun direct-current power supply machine of the invention.
The names of the parts indicated by the reference numerals in the drawings are as follows:
the charging system comprises a power supply
Detailed Description
The invention is further described with reference to the following figures.
The power supply system of the double-gun direct-current power supply machine shown in fig. 3 comprises a power supply
By adopting the circuit structure, the
In this embodiment, the output power of the
The invention also provides power supply methods for the double-gun direct-current power supply machine, as shown in fig. 4, the method is applied to the
step a1, obtaining charging requirements of a
in this step, the
A step a2 of obtaining the number of
and step A3, controlling the on and off of each
Specifically, the step a2 of obtaining the number of
step B1, judging whether the total charging power of the two charging demands exceeds the maximum charging power; if not, go to step B2; if yes, go to step B3;
step B2, calculating the number of
in this step, the power of a
And step B3, distributing the
In order to make the charging process more intelligent, the
According to the power supply system and the intelligent power supply method of the double-gun direct-current power supply machine, the charging module can be distributed to the two charging guns only by controlling the pairs or two pairs of relays to be disconnected through a smart layout mode of the relays and the charging module, and the power supply method can realize the distribution of the charging module as required by acquiring the charging requirement of a charging object.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
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