CN104734285B - The method that each machine equal current charge is kept during multiple charger parallel connections - Google Patents
The method that each machine equal current charge is kept during multiple charger parallel connections Download PDFInfo
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- CN104734285B CN104734285B CN201510087756.9A CN201510087756A CN104734285B CN 104734285 B CN104734285 B CN 104734285B CN 201510087756 A CN201510087756 A CN 201510087756A CN 104734285 B CN104734285 B CN 104734285B
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Abstract
The invention discloses a kind of method for keeping the equal current charge of each machine during multiple charger parallel connections, including at least two and the charger of host and slave processors form is unified into, passed through between main frame and each slave（CAN）Communication transfer data, constant current charging mode is operated in the incipient stage main frame of charging work and each slave；When main frame and each slave switch to constant-voltage charge pattern from constant current charging mode, main frame detects the output charging current of main frame and each slave in real time, main frame calculates total real time charging electric current in real time simultaneously, when total real time charging electric current some setting value smaller than charging current set in advance, main frame passes through（CAN）Control on Communication adjusts every charger, main frame and each slave is averraged total real time charging electric current.It is an advantage of the invention that：Prevented because some charger load is excessive and caused by the phenomenon of unit or machine failure.
Description
Technical field
The present invention relates to charger, is related specifically to the technical field that multiple charger parallel combinations charge.
Background technology
With developing rapidly for new energy, the use of high capacity cell is more and more extensive.In actual applications, filled when single
When the power of motor can not meet the charging requirement of high capacity cell, it will usually meet by the way of multiple chargers are in parallel
Its charging requirement, is commonly called as and machine charges.When being charged in the form of multiple chargers are in parallel, generally by one of charging
Machine is set to main frame, and remaining charger is then slave, is passed through between main frame and each slave（CAN）Communication transfer data.At present, it is multiple
There are the following problems when charger parallel combination charges：In the incipient stage of charging work, main frame and each slave are operated in perseverance
Current charge pattern, now charging current is larger, and main frame and each slave averraged total charging current, main frame and each slave
Power output it is also roughly equal.With the continuous progress of charging work, charging current can gradually decrease, charging voltage meeting
Gradually rise, main frame and respectively switched to constant-voltage charge pattern from chance from constant current charging mode, now, due to total charging electricity
Rheology is small, and the output charging current of main frame and each slave can be different, causes each not phase of the power output of main frame and each slave
Together, so as to cause the working life of the charger of output power to shorten, it finally have impact on the working life of complete machine.
The content of the invention
It is an object of the invention to：A kind of method that each machine equal current charge can be kept when multiple charger parallel connections are provided.
To achieve the above object, present invention employs following technical scheme.
The method for keeping the equal current charge of each machine during described multiple charger parallel connections, including given after at least two parallel combinations
The charger of high capacity cell charging, and one of charger be main frame, remaining charger are then slave, main frame and respectively from
Pass through between machine（CAN）Communication transfer data；Constant-current charge is operated in the incipient stage main frame of charging work and each slave
Pattern；As charging work continues, main frame and respectively switch to constant-voltage charge pattern from chance from constant current charging mode, this
When, main frame detects the output charging current of main frame and each slave in real time, while main frame calculates total real time charging electric current in real time, and
By total real time charging electric current compared with charging current set in advance, when total real time charging electric current is than set in advance
During small some setting value of charging current, main frame passes through（CAN）Control on Communication adjusts every charger, main frame and each slave is averaged
Share total real time charging electric current.
Further, the method for keeping the equal current charge of each machine during foregoing multiple charger parallel connections, wherein：Some described
Setting value is 0.5A.
The beneficial effects of the invention are as follows：On the one hand, main frame and each slave can be made to remain equal in whole charging process
Current charge state, prevented because some charger load is excessive and caused by the phenomenon of unit or machine failure.On the other hand, in reality
In the production of border can also according to the needs of charge power and freedom and flexibility increase or decrease the quantity of slave, greatly facilitate production
The production scheduling work of enterprise.
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
The method for keeping the equal current charge of each machine in the present embodiment, during described multiple charger parallel connections, including three parallel connections
Charger after combination to high capacity cell charging, and one of charger be main frame, remaining two charger then for from
Machine, pass through between main frame and each slave（CAN）Communication transfer data, total output charging current 30A of three charger settings；
Charge work incipient stage main frame and each slave be operated in constant current charging mode, now, main frame and each slave output fill
Electric current is 10A respectively；As charging work continues, main frame and respectively switch to constant pressure from chance from constant current charging mode
Charge mode, now, main frame detect the output charging current of main frame and each slave in real time, while main frame calculates always in real time in real time
Charging current, and by total real time charging electric current compared with charging current set in advance, when total real time charging electric current
Some setting value smaller than charging current set in advance --- during 0.5A, main frame passes through（CAN）Control on Communication adjusts every charging
Machine, main frame and each slave is set to averraged total real time charging electric current.For example, some time in charging process, when main frame is counted in real time
When the total real time charging electric current calculated is 20A, now main frame controls to adjust every charger by CAN communication, makes main frame and each
Slave averraged total real time charging electric current, i.e., the charging current of every charger output is respectively 6.7A or so.Thus not
Occur that the charging current that a charger exports is less than 1A, the charging current of remaining two chargers output is respectively a 10A left sides
Right phenomenon, that is, be not in the phenomenon that a charger is operated in Light Condition and remaining charger is operated in full load condition,
So as to prevented because some charger load is excessive and caused by the phenomenon of unit or machine failure.On the other hand, using the present invention
Described method, in actual production can also according to the needs of charge power and freedom and flexibility increase or decrease the number of slave
Amount, greatly facilitate the production scheduling work of manufacturing enterprise.
Claims (1)
1. Large Copacity electricity is given after the method for keeping the equal current charge of each machine more than during individual charger parallel connection, including at least two parallel combinations
The charger of pond charging, and one of charger is main frame, and remaining charger is then slave, is led between main frame and each slave
Cross CAN communication transmission data；Constant current charging mode is operated in the incipient stage main frame of charging work and each slave；Its feature
It is：As charging work continues, main frame and respectively switch to constant-voltage charge pattern from chance from constant current charging mode, this
When, main frame detects the output charging current of main frame and each slave in real time, while main frame calculates total real time charging electric current in real time, and
By total real time charging electric current compared with charging current set in advance, when total real time charging electric current is than set in advance
During small some setting value of charging current, main frame controls to adjust every charger by CAN communication, makes main frame and each slave average mark
Carry on a shoulder pole total real time charging electric current；Some described setting value is 0.5A.
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| CN201510087756.9A CN104734285B (en) | 2015-02-26 | 2015-02-26 | The method that each machine equal current charge is kept during multiple charger parallel connections |
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| CN201510087756.9A CN104734285B (en) | 2015-02-26 | 2015-02-26 | The method that each machine equal current charge is kept during multiple charger parallel connections |
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| CN104734285A CN104734285A (en) | 2015-06-24 |
| CN104734285B true CN104734285B (en) | 2018-04-06 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105634094B (en) * | 2016-01-29 | 2018-10-30 | 山东鲁能智能技术有限公司 | A kind of method of the equal flow point group of two-way charger |
| CN106156951B (en) * | 2016-06-30 | 2019-10-18 | 温州大学 | Parallel operation system current sharing energy evaluation method |
| CN108011407B (en) * | 2016-11-01 | 2019-12-03 | 舒尔电子(苏州)有限公司 | Charging unit, charging system and information transferring method |
| KR102269106B1 (en) * | 2017-11-20 | 2021-06-24 | 주식회사 엘지화학 | Method for control battery power limit |
| 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 |
| 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 |
| CN109617189B (en) * | 2019-01-09 | 2022-05-17 | 石家庄通合电子科技股份有限公司 | Current equalizing method of parallel operation mode of charging modules |
| 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 |
| 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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| JP2012110199A (en) * | 2010-10-27 | 2012-06-07 | Equos Research Co Ltd | Electric power transmission system |
| CN102280912B (en) * | 2011-06-10 | 2015-02-25 | 深圳市金威源科技股份有限公司 | Equalization circuit of charge and discharge circuit of battery pack |
| CN202840651U (en) * | 2012-05-21 | 2013-03-27 | 中国电力科学研究院 | Parallel current sharing circuit of charging module of electric automobile charger |
| CN203368091U (en) * | 2013-07-26 | 2013-12-25 | 国家电网公司 | One-pile and multi-gun type electric automobile charging pile |
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Non-Patent Citations (1)
| Title |
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| 大功率充电机充电性能优化策略研究;陈华金;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20111231;第46-56页 * |
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