CN104734285A - Method for guaranteeing current-equalizing charging of charging machines when charging machines are connected in parallel - Google Patents
Method for guaranteeing current-equalizing charging of charging machines when charging machines are connected in parallel Download PDFInfo
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- CN104734285A CN104734285A CN201510087756.9A CN201510087756A CN104734285A CN 104734285 A CN104734285 A CN 104734285A CN 201510087756 A CN201510087756 A CN 201510087756A CN 104734285 A CN104734285 A CN 104734285A
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Abstract
The invention discloses a method for guaranteeing current-equalizing charging of charging machines when the charging machines are connected in parallel. At least two charging machines connected in parallel in a master and slave mode are included, data are transmitted between a master machine and slave machines through (CAN) communication, and in the early stage of charging, the master machine and the slave machines work in a constant-current charging mode; when the master machine and the slave machines are converted from the constant-current charging mode into a constant-voltage charging mode, the master machine detects output charging current of the master machine and the slave machines in real time, meanwhile, the master machine calculates total real-time charging current in real time, when the total real-time charging current is smaller than preset charging current by a certain set value, the master machine controls and adjusts each charging machine through (CAN) communication, and the master machine and the slave machines can share the total real-time charging current in average. The method has the advantage that the phenomenon that one certain charging machine is too large in load and accordingly the single machine or all the machines break down is avoided.
Description
Technical field
The present invention relates to charger, be related specifically to the technical field of multiple charger parallel combination charging.
Background technology
Along with developing rapidly of new forms of energy, the use of high capacity cell is more and more extensive.In actual applications, when the power of single charger can not meet the charging requirement of high capacity cell, the mode of multiple charger parallel connection usually can be adopted to meet its charging requirement, be commonly called as parallel operation charging.When adopting the form of multiple charger parallel connection to charge, usually one of them charger is set to main frame, all the other chargers are then from machine, main frame and respectively between machine by (CAN) communication transfer data.At present, during multiple charger parallel combination charging, there are the following problems: in the incipient stage of charging work, main frame and be respectively all operated in constant current charging mode from machine, now charging current is larger, and main frame and respectively on average share total charging current from machine, main frame is with each also roughly equal from the power output of machine.Along with constantly carrying out of charging work, charged electrical fail to be convened for lack of a quorum decrease gradually, charging voltage can rise gradually to some extent, main frame and respectively transfer constant voltage charge pattern to from chance from constant current charging mode, now, because total charging current diminishes, main frame and respectively fail to be convened for lack of a quorum different from the output charged electrical of machine, causes main frame and respectively different from the power output of machine, thus the working life of the charger causing power output large can shorten, finally have impact on the working life of complete machine.
Summary of the invention
The object of the invention is to: a kind of method that can keep each machine equal current charge when providing multiple charger in parallel.
For achieving the above object, present invention employs following technical scheme.
Described multiple chargers keep the method for each machine equal current charge time in parallel, the charger charged to high capacity cell after comprising at least two parallel combinations, and one of them charger is main frame, all the other chargers are then from machine, main frame and respectively between machine by (CAN) communication transfer data; Charging work incipient stage main frame and be respectively all operated in constant current charging mode from machine; Along with proceeding of charging work, main frame and respectively transfer constant voltage charge pattern to from chance from constant current charging mode, now, main frame detects main frame and each output charging current from machine in real time, main frame calculates total real time charging electric current in real time simultaneously, and this total real time charging electric current and the charging current preset are compared, when the charging current that this total real time charging current ratio presets certain set point little, main frame regulates every platform charger by (CAN) Control on Communication, makes main frame and respectively on average shares total real time charging electric current from machine.
Further, the method for each machine equal current charge is kept when aforesaid multiple charger is in parallel, wherein: certain described set point is 0.5A.
The invention has the beneficial effects as follows: on the one hand, main frame can be made and respectively remain current-sharing charged state from machine in whole charging process, having stopped the phenomenon causing unit or machine failure because certain charger load is excessive.On the other hand, can also increase or reduce to freedom and flexibility according to the needs of charge power the quantity from machine in actual production, greatly facilitate the production scheduling work of manufacturing enterprise.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
In the present embodiment, described multiple chargers keep the method for each machine equal current charge time in parallel, the charger charged to high capacity cell after comprising three parallel combinations, and one of them charger is main frame, all the other two chargers are then from machine, main frame and respectively between machine by (CAN) communication transfer data, total output charging current 30A of three charger settings; Charging work incipient stage main frame and respectively be all operated in constant current charging mode from machine, now, main frame and be respectively 10A respectively from the charging current of machine output; Along with proceeding of charging work, main frame and respectively transfer constant voltage charge pattern to from chance from constant current charging mode, now, main frame detects main frame and each output charging current from machine in real time, main frame calculates total real time charging electric current in real time simultaneously, and this total real time charging electric current and the charging current preset are compared, when charging current certain set point little that this total real time charging current ratio presets---during 0.5A, main frame regulates every platform charger by (CAN) Control on Communication, makes main frame and respectively on average shares total real time charging electric current from machine.Such as, some time in charging process, when total real time charging electric current that main frame calculates in real time is 20A, now main frame is by the every platform charger of CAN communication regulating and controlling, make main frame and respectively on average share total real time charging electric current from machine, the charging current that namely every platform charger exports is respectively about 6.7A.Would not occur that the charging current that a charger exports is less than 1A, the charging current of all the other two chargers outputs is respectively the phenomenon of about 10A like this, namely there will not be that a charger is operated in Light Condition and all the other chargers are operated in the phenomenon of full load condition, thus stopped the phenomenon causing unit or machine failure because certain charger load is excessive.On the other hand, adopt method of the present invention, can also increase or reduce to freedom and flexibility according to the needs of charge power the quantity from machine in actual production, greatly facilitate the production scheduling work of manufacturing enterprise.
Claims (2)
1. when many chargers are in parallel, keep the method for the equal current charge of each machine, the charger charged to high capacity cell after comprising at least two parallel combinations, and one of them charger is main frame, all the other chargers are then from machine, main frame and respectively between machine by (CAN) communication transfer data; Charging work incipient stage main frame and be respectively all operated in constant current charging mode from machine; It is characterized in that: along with proceeding of charging work, main frame and respectively transfer constant voltage charge pattern to from chance from constant current charging mode, now, main frame detects main frame and each output charging current from machine in real time, main frame calculates total real time charging electric current in real time simultaneously, and this total real time charging electric current and the charging current preset are compared, when the charging current that this total real time charging current ratio presets certain set point little, main frame regulates every platform charger by (CAN) Control on Communication, makes main frame and respectively on average shares total real time charging electric current from machine.
2. keep the method for each machine equal current charge when multiple charger according to claim 1 is in parallel, it is characterized in that: certain described set point is 0.5A.
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| CN105634094A (en) * | 2016-01-29 | 2016-06-01 | 山东鲁能智能技术有限公司 | Current-equalizing and grouping method for two-way charger |
| CN106156951A (en) * | 2016-06-30 | 2016-11-23 | 温州大学 | Parallel operation system current-sharing method of evaluating performance based on current-sharing deviation expected matrix 2 norm |
| CN107895984A (en) * | 2017-12-04 | 2018-04-10 | 西安特锐德智能充电科技有限公司 | A kind of direct-current charging post power parallel device and charging method |
| CN108011407A (en) * | 2016-11-01 | 2018-05-08 | 舒尔电子(苏州)有限公司 | Charging unit, charging system and information transferring method |
| CN109378895A (en) * | 2018-12-18 | 2019-02-22 | 北京汇能精电科技股份有限公司 | The control method of solar controller, apparatus and system |
| CN109617189A (en) * | 2019-01-09 | 2019-04-12 | 石家庄通合电子科技股份有限公司 | A kind of current equalizing method of charging module and machine mode |
| CN111791738A (en) * | 2020-07-10 | 2020-10-20 | 西安许继电力电子技术有限公司 | Multi-machine parallel constant-voltage current-sharing control method and device for electric ship charger |
| CN113708458A (en) * | 2021-09-16 | 2021-11-26 | 阳光电源股份有限公司 | Multi-charging-module parallel current sharing control method, device and system |
| US11482875B2 (en) * | 2017-11-20 | 2022-10-25 | Lg Energy Solution, Ltd. | Method for controlling battery power limit value |
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| CN105634094A (en) * | 2016-01-29 | 2016-06-01 | 山东鲁能智能技术有限公司 | Current-equalizing and grouping method for two-way charger |
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| CN107895984A (en) * | 2017-12-04 | 2018-04-10 | 西安特锐德智能充电科技有限公司 | A kind of direct-current charging post power parallel device and charging method |
| CN109378895A (en) * | 2018-12-18 | 2019-02-22 | 北京汇能精电科技股份有限公司 | The control method of solar controller, apparatus and system |
| CN109378895B (en) * | 2018-12-18 | 2021-01-12 | 北京汇能精电科技股份有限公司 | Control method, device and system of solar controller |
| CN109617189A (en) * | 2019-01-09 | 2019-04-12 | 石家庄通合电子科技股份有限公司 | A kind of current equalizing method of charging module and machine mode |
| CN111791738A (en) * | 2020-07-10 | 2020-10-20 | 西安许继电力电子技术有限公司 | Multi-machine parallel constant-voltage current-sharing control method and device for electric ship charger |
| CN111791738B (en) * | 2020-07-10 | 2022-06-07 | 西安许继电力电子技术有限公司 | Multi-machine parallel constant-voltage current-sharing control method and device for electric ship charger |
| CN113708458A (en) * | 2021-09-16 | 2021-11-26 | 阳光电源股份有限公司 | Multi-charging-module parallel current sharing control method, device and system |
| CN113708458B (en) * | 2021-09-16 | 2024-04-12 | 阳光电源股份有限公司 | Multi-charging-module parallel current sharing control method, device and system |
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