CN105162204A - New energy vehicle local equalization charging system - Google Patents
New energy vehicle local equalization charging system Download PDFInfo
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- CN105162204A CN105162204A CN201510634622.4A CN201510634622A CN105162204A CN 105162204 A CN105162204 A CN 105162204A CN 201510634622 A CN201510634622 A CN 201510634622A CN 105162204 A CN105162204 A CN 105162204A
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Abstract
The invention relates to a new energy vehicle local equalization charging system, which adopts a DC bus power supply topological network, wherein the DC bus power supply topological network comprises a power distribution device, charging stations, a bidirectional AC/DC module and an equalization charging module; the power distribution device is connected with a high-voltage power grid, divided into two paths after voltage transformation and filtering and then connected with subsequence nodes; one path is connected to the equalization charging module, the other path is connected to a low-voltage power grid; the low-voltage power grid is connected with the bidirectional AC/DC module through a cable; the equalization charging module is connected with the bidirectional AC/DC module through a cable; a data acquisition unit, a CAN bus, a battery BMS system and a BMS intelligent analysis unit are arranged inside the equalization charging module; and the bidirectional AC/DC module is connected with the charging stations through a DC bus, and a charging machine is arranged inside each charging station. The new energy vehicle local equalization charging system can detect output current and voltage of a matched low-voltage power distribution cabinet and electricity consumption of the current charging machine in real time, and notifies the corresponding charging machine to adjust the charging strategy through an internal equalization strategy once detecting that the output current exceeds a quota limit.
Description
Technical field
The invention belongs to new-energy automobile and manufacture field, be specifically related to a kind of new-energy automobile partial equilibrium charging system.
Background technology
Due to the restriction of new-energy automobile power battery energy and terminal voltage, new-energy automobile needs to adopt polylith battery to carry out series and parallel combination, and the nonlinearity of electrokinetic cell characteristic, make battery management system (BMS-BatteryManagementSystem) become the necessary devices of electric automobile.The most basic function of BMS is the operating state (voltage of battery, electric current and temperature) of monitoring battery, the battery capacity (SOC) of prediction electrokinetic cell and corresponding remaining driving mileage, carry out battery management avoiding occurring overdischarge, overcharge, the serious energy imbalance of voltage between overheated and cell, maximally utilise battery storage capacity and cycle life.
Specify in GB, during new-energy automobile charging, BMS system and charger realize interactive communication by CAN, and in charging process, the Data Dynamic adjustment charge parameter that charger provides according to BMS, performs corresponding actions and complete charging process.But in actual moving process, the charging process of charger also will be subject to the load restriction of affiliated power distribution cabinet, in charging process, if do not take balanced way to be limited, probably causes whole power distribution cabinet overload operation and then causes whole charging system to paralyse.
Summary of the invention
In order to overcome prior art deficiency, the present invention proposes a kind of new-energy automobile partial equilibrium charging system, native system detects the power consumption of the output current of supporting low-voltage distribution cabinet, voltage and current charger in real time, once detect that output current exceedes amount restriction, by internal balance strategy, system will notify that corresponding charger carries out charging strategy adjustment.
Technical solution of the present invention is, a kind of new-energy automobile partial equilibrium charging system, adopt DC bus powered topological network, described DC bus powered topological network comprises power distribution equipment, charging station, two-way AC/DC module and balanced Power entry module, power distribution equipment accesses from high-voltage fence, after carrying out transformation and filtering, divide two-way access descendant node, the described balanced Power entry module of one tunnel access, a low voltage electric network is accessed on another road, low voltage electric network is connected by cable with two-way AC/DC module, balanced Power entry module is connected by cable with two-way AC/DC module, the inside of balanced Power entry module is provided with data acquisition unit, CAN, battery BMS system and BMS intellectual analysis unit, two-way AC/DC module is connected with charging station by a DC bus, charger is provided with in charging station.
BMS intellectual analysis unit carries out early warning and internal balance calculating according to the power consumption of the Design cooling load of switchgear house and current charger, and ensure electric power system reliability service, the analytical method of BMS intellectual analysis unit is:
The first step: period preset time T
Second step: T subtracts one, gathers the power load of each charger of charging station;
3rd step: if current total power load is less than 80% of the Design cooling load of current transformer substation, then each charger voluntarily with battery BMS system negotiates charging strategy;
4th step: if current total power load is greater than 80% of the Design cooling load of current transformer substation, current total power load is less than 100% of the Design cooling load of current transformer substation simultaneously, then notify the charger adjustment charging strategy just starting to charge, restriction charging current;
5th step: if current total power load is greater than 100% of native system Design cooling load, then notification section charger stops charging, preferentially meets rechargeable battery close to the charger be full of;
6th step: period time T is zero, no, turns second step;
7th step: turn the first step.
Beneficial effect of the present invention is:
1) control module of charger of the present invention receives the instruction of balanced Power entry module, its charging strategy set with BMS of adjustment in real time;
2) the balanced Power entry module of the present invention differentiates electricity consumption peak valley according to historical data analysis, and on the basis ensureing safety utilization of electric power, timesharing is avoided the peak hour as new energy car battery charging;
3) the present invention detects the total load and current loads that charger affiliated area powers in real time, in real time the state parameter etc. of each charger of monitoring;
4) total load of the present invention according to current charging electrical network and the power load of current charger, adopts equalization algorithm to carry out internal control, carries out reasonable distribution to the charging load required;
5) the comprehensive current loads of current charging electrical network of charger of the present invention and the BMS system of new-energy automobile carry out equalizing charge to new energy vehicle;
6) the present invention is according to the Design cooling load of current power supply area, differentiates electricity consumption peak valley, preferentially meets non-charging load, and on the basis taking into full account electric power system security of operation, the new-energy automobile that timesharing is avoided the peak hour in local area network realizes charging.
Accompanying drawing explanation
Fig. 1 is network structure of the present invention
In figure, 1, high-voltage fence; 2, power distribution equipment; 3, low voltage electric network; 4, balanced Power entry module; 5, DC bus; 6, charging station; 7, two-way DC/DC device; 8, charger; 9, two-way AC/DC module.
Embodiment
As shown in Figure 1, the present invention adopts DC bus powered topological network, comprise power distribution equipment 2, charging station 6, two-way AC/DC module 9 and balanced Power entry module 4, power distribution equipment 2 accesses from high-voltage fence 1, after carrying out transformation and filtering, divide two-way access descendant node, the described balanced Power entry module 4 of one tunnel access, a low voltage electric network 3 is accessed on another road, low voltage electric network 3 is connected by cable with two-way AC/DC module 9, balanced Power entry module 4 is connected by cable with two-way AC/DC module 9, the inside of balanced Power entry module 4 is provided with data acquisition unit, CAN, battery BMS system and BMS intellectual analysis unit, battery BMS Operation system setting has bidirectional interface, two-way AC/DC module 9 is connected with charging station 6 by a DC bus 5, charging station 6 is connected with charger 8 by two-way DC/DC device 7.
BMS intellectual analysis unit carries out early warning and internal balance calculating according to the power consumption of the Design cooling load of switchgear house and current charger, and ensure electric power system reliability service, the analytical method of BMS intellectual analysis unit is:
The first step: period preset time T
Second step: T subtracts one, gathers the power load of each charger of charging station;
3rd step: if current total power load is less than 80% of the Design cooling load of current transformer substation, then each charger 8 voluntarily with battery BMS system negotiates charging strategy;
4th step: if current total power load is greater than 80% of the Design cooling load of current transformer substation, current total power load is less than 100% of the Design cooling load of current transformer substation simultaneously, then notify that the charger 8 just starting to charge adjusts charging strategy, restriction charging current;
5th step: if current total power load is greater than 100% of native system Design cooling load, then notification section charger 8 stops charging, preferentially meets rechargeable battery close to the charger 8 be full of;
6th step: period time T is zero, no, turns second step;
7th step: turn the first step.
Charger 8 inside is provided with control module, is received the instruction of balanced Power entry module 4 by two-way DC/DC device 7, the charging strategy of in real time adjustment itself and battery BMS default;
Balanced Power entry module 4 differentiates electricity consumption peak valley according to historical data analysis, and on the basis ensureing safety utilization of electric power, timesharing is avoided the peak hour as new energy car battery charging;
The major function of balanced Power entry module of the present invention has:
1) total load and current loads that charger 8 affiliated area powers is detected in real time.
2) state parameter etc. of each charger 8 is monitored in real time;
3) according to the total load of current charging electrical network and the power load of current charger 8, adopt equalization algorithm to carry out internal control, reasonable distribution is carried out to the charging load required;
4) the comprehensive current loads of current charging electrical network of charger 8 and the BMS system of new-energy automobile carry out equalizing charge to new energy vehicle;
5) system is according to the Design cooling load of current power supply area, differentiates electricity consumption peak valley, preferentially meets non-charging load, and on the basis taking into full account electric power system security of operation, the new-energy automobile that timesharing is avoided the peak hour in local area network realizes charging.
Power factor of the present invention reaches 0.99.
Harmonic content of the present invention controls lower than 5%.
Claims (2)
1. a new-energy automobile partial equilibrium charging system, take DC bus powered topological network, described DC bus powered topological network comprises power distribution equipment, charging station, two-way AC/DC module and balanced Power entry module, it is characterized in that: power distribution equipment accesses from high-voltage fence, after carrying out transformation and filtering, divide two-way access descendant node, the described balanced Power entry module of one tunnel access, a low voltage electric network is accessed on another road, low voltage electric network is connected by cable with two-way AC/DC module, balanced Power entry module is connected by cable with two-way AC/DC module, the inside of balanced Power entry module is provided with data acquisition unit, CAN, battery BMS system and BMS intellectual analysis unit, two-way AC/DC module is connected with charging station by a DC bus, charger is provided with in charging station.
2. new-energy automobile partial equilibrium charging system according to claim 1, it is characterized in that: BMS intellectual analysis unit carries out early warning and internal balance calculating according to the power consumption of the Design cooling load of switchgear house and current charger, ensure electric power system reliability service, the analytical method of BMS intellectual analysis unit is:
The first step: period preset time T
Second step: T subtracts one, gathers the power load of each charger of charging station;
3rd step: if current total power load is less than 80% of the Design cooling load of current transformer substation, then each charger voluntarily with battery BMS system negotiates charging strategy;
4th step: if current total power load is greater than 80% of the Design cooling load of current transformer substation, current total power load is less than 100% of the Design cooling load of current transformer substation simultaneously, then notify the charger adjustment charging strategy just starting to charge, restriction charging current;
5th step: if current total power load is greater than 100% of native system Design cooling load, then notification section charger stops charging, preferentially meets rechargeable battery close to the charger be full of;
6th step: period time T is zero, no, turns second step;
7th step: turn the first step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510634622.4A CN105162204A (en) | 2015-09-30 | 2015-09-30 | New energy vehicle local equalization charging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510634622.4A CN105162204A (en) | 2015-09-30 | 2015-09-30 | New energy vehicle local equalization charging system |
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| CN105162204A true CN105162204A (en) | 2015-12-16 |
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| CN201510634622.4A Pending CN105162204A (en) | 2015-09-30 | 2015-09-30 | New energy vehicle local equalization charging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017650A (en) * | 2017-04-24 | 2017-08-04 | 沈阳新阳光机电科技有限公司 | New-energy automobile Intelligent energy storage charging station system and its control method |
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| CN102025182A (en) * | 2010-11-30 | 2011-04-20 | 梁一桥 | Modular charging/discharging system of power battery pack of multifunctional electromobile |
| CN102339054A (en) * | 2011-09-19 | 2012-02-01 | 江西省电力科学研究院 | Linkage control method of distribution transformer load management and electromobile charging process |
| US20130049677A1 (en) * | 2010-03-05 | 2013-02-28 | Abb B,V, | System, devices and method for charging a battery of an electric vehicle |
| CN103490488A (en) * | 2013-09-29 | 2014-01-01 | 华南理工大学 | Electric automobile vehicle-mounted charge management system and achieving method thereof |
| CN203984063U (en) * | 2014-07-08 | 2014-12-03 | 深圳市英可瑞科技开发有限公司 | Charging system for electric automobile |
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2015
- 2015-09-30 CN CN201510634622.4A patent/CN105162204A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130049677A1 (en) * | 2010-03-05 | 2013-02-28 | Abb B,V, | System, devices and method for charging a battery of an electric vehicle |
| CN102025182A (en) * | 2010-11-30 | 2011-04-20 | 梁一桥 | Modular charging/discharging system of power battery pack of multifunctional electromobile |
| CN102339054A (en) * | 2011-09-19 | 2012-02-01 | 江西省电力科学研究院 | Linkage control method of distribution transformer load management and electromobile charging process |
| CN103490488A (en) * | 2013-09-29 | 2014-01-01 | 华南理工大学 | Electric automobile vehicle-mounted charge management system and achieving method thereof |
| CN203984063U (en) * | 2014-07-08 | 2014-12-03 | 深圳市英可瑞科技开发有限公司 | Charging system for electric automobile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017650A (en) * | 2017-04-24 | 2017-08-04 | 沈阳新阳光机电科技有限公司 | New-energy automobile Intelligent energy storage charging station system and its control method |
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Effective date of registration: 20160513 Address after: 518049 Guangdong city of Shenzhen province Futian District Camry Factory 1, the entire 318 Applicant after: AUTOWAY, GUANGDONG ELECTRIC POWER CONSTRUCTION CO., LTD. Address before: 266000 Qingdao hi tech Industrial Development Zone, Qingdao National University Science Park, Shandong Applicant before: Qingdao Pike Energy Co.,Ltd. |
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Address after: Longgang street community of Longgang District of Shenzhen City Tongde Guangdong province 518049 pit road No. 64 building two Applicant after: Shenzhen city and Wei Wei power Polytron Technologies Inc Address before: 518049 Guangdong city of Shenzhen province Futian District Camry Factory 1, the entire 318 Applicant before: AUTOWAY, GUANGDONG ELECTRIC POWER CONSTRUCTION CO., LTD. |
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Application publication date: 20151216 |