CN203522297U - Initial charging device of energy storage system cell - Google Patents
Initial charging device of energy storage system cell Download PDFInfo
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- CN203522297U CN203522297U CN201320607920.0U CN201320607920U CN203522297U CN 203522297 U CN203522297 U CN 203522297U CN 201320607920 U CN201320607920 U CN 201320607920U CN 203522297 U CN203522297 U CN 203522297U
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- storage system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides an initial charging device of an energy storage system cell. The device comprises a transformer connected with a circuit, a current transformer and a cell. The transformer is connected to the current transformer through a first contactor KM1. The current transformer is connected to the cell through two lines which are connected in parallel and forms a loop with the cell. The parallel-connected line is characterized in that a current-limiting resistor R21 is connected in series with a sixth contactor KM6 and then is connected in parallel with a fifth contactor KM5. By using the device of the utility model, initial charging portion cost is saved; initial charging time is shortened; an initial charging portion size is reduced; the service life of the cell is prolonged and so on. A reliable initial cell charging scheme with low cost is provided for a user.
Description
Technical field
The utility model relates to a kind of initial charge method and converter structure and control program of energy-storage system battery.The method can be widely used in intelligent microgrid battery energy storage system, wind power plant energy-storage system, photovoltaic plant energy-storage system and other energy-storage systems or power plant application field.
Background technology
Weather and environmental problem along with the very fast growth of human society energy demand total amount and pollution day by day, solar energy, utilizing of the clean reproducible energies such as wind energy is increasing, photovoltaic plant, wind power plant increases gradually, because solar energy, wind energy have randomness and intermittence, make photovoltaic plant, output power fluctuation of wind farm and uncontrollable. along with more and more large-scale photovoltaic power stations, wind farm grid-connected operation, the power output of this random fluctuation has proposed stern challenge to the safe and stable operation of electrical network.Utilizing energy storage technology to coordinate photovoltaic plant, wind energy turbine set generator operation to carry out level and smooth output-power fluctuation is one of common method, and battery has the advantages such as large capacity, reaction speed be fast and is widely used in extensive energy-storage system.
Battery energy storage system, when having the advantages such as scale is large, reaction speed is fast, also has the shortcomings such as floor space is large, initial charge is difficult.Wherein battery initial charge function is most important in battery applications process.
Summary of the invention
Utility model object: the utility model provides a kind of energy-storage system battery initial charge device and method, its objective is the shortcomings such as solution battery initial charge cost is in the past high, the time is long, volume is large.
Technical scheme: the utility model is achieved through the following technical solutions:
Energy-storage system battery initial charge device, is characterized in that: this device can start battery to charge from no-voltage, and device comprises transformer, current transformer and the battery of connecting circuit; Transformer is connected to current transformer by the first contactor, and current transformer is connected to battery and is formed loop with battery by two circuits of parallel connection, and the circuit of described parallel connection is in parallel with the 5th contactor again after current-limiting resistance is connected with the 6th contactor.
The energy-storage system battery initial charge method of utilizing above-mentioned energy-storage system battery initial charge device lock to implement, form and the kind of battery are not limit.It is characterized in that: the step of the method is as follows:
The method is divided into two stages: the first stage is battery current-limiting charge process, in this stage the charging interval very short, utilize the floating charge characteristic of battery to make battery produce capacitive, and cell voltage carried out to clamper; In initial charge process in order to prevent too high electric current, select initial charge current-limiting resistance to carry out current limliting, its initial charge current-limiting resistance size can determine according to battery initial charge current size, and in segmented initial charge method, the size of battery initial charge current does not affect battery initial charge effect;
Second stage is permanent power charge mode, utilizes energy accumulation current converter dynamically to adjust charge power according to battery status in this stage.
First stage:
The first contactor (KM1) and the 6th contactor (KM6) adhesive, after current transformer natural commutation, DC bus utilizes current-limiting resistance (R21) current limliting, gives clamped voltage of battery, and cell voltage is drawn high to given voltage;
According to the initial charge curve of battery, battery can reach rapidly the maximum voltage under this electric current, in this stage, utilizes reversible convertor unit to draw high cell voltage, and main if it were not for battery is charged;
Second stage: when clamped after given voltage to battery, utilize the direct adhesive of current transformer the 5th contactor (KM5), in this process, keep suction and the state of the 6th contactor (KM6); The 5th contactor (KM5) inhale and after, by current-limiting resistance (R21) short circuit, battery voltage drop moment reaches current transformer natural commutation voltage, in this process, battery current will increase rapidly, reach battery maximum current at this moment; The rapid adjustment that utilizes current transformer here at the magnitude of voltage having formed and carry out current limliting operation, guarantees that the step of battery current changes in the rated range of battery and current transformer by voltage stabilization.
Advantage and effect: the utility model provides a kind of energy-storage system battery initial charge device, and this device comprises transformer, current transformer and the battery of connecting circuit; Transformer is connected to current transformer by the first contactor KM1, and current transformer is connected to battery and is formed loop with battery by two circuits of parallel connection, and the circuit of described parallel connection is in parallel with the 5th contactor KM5 again after current-limiting resistance R21 connects with the 6th contactor KM6.
The utility model is saved initial charge departmental cost, shortens the initial charge time, reduces initial charge partial volume, is improved battery etc., for user provides low-cost battery initial charge scheme reliably.
accompanying drawing explanation:
Fig. 1 is segmented battery energy storage system initial charge structure chart;
Fig. 2 is that segmented battery energy storage system is implemented example circuit diagram.
embodiment:below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, the utility model provides a kind of energy-storage system battery initial charge device, and this device comprises transformer, current transformer and the battery of connecting circuit; Transformer is connected to current transformer by the first contactor KM1, and current transformer is connected to battery and is formed loop with battery by two circuits of parallel connection, and the circuit of described parallel connection is in parallel with the 5th contactor KM5 again after current-limiting resistance R21 connects with the 6th contactor KM6.
Energy-storage system battery initial charge method:
First stage:
The first contactor KM1 and the 6th contactor KM6 adhesive, after current transformer natural commutation, DC side is DC170V, utilizes current-limiting resistance R21 current limliting, the very little 20A of electric current left and right, size may change, and gives clamped voltage of battery, for example: 70V when cell voltage is drawn high to 20A;
According to the initial charge curve of battery, battery can reach rapidly the maximum voltage under this electric current, in this stage, utilizes reversible convertor unit to draw high cell voltage, and main if it were not for battery is charged;
A second stage: when clamped (the given voltage is here distinguished according to different battery sizes, so different batteries has different given voltage to given voltage to battery! ) after, utilize the direct adhesive of current transformer the 5th contactor KM5, in this process, keep suction and the state of the 6th contactor KM6; The 5th contactor KM5 inhale and after, by current limliting current-limiting resistance R21 short circuit, battery voltage drop moment reaches current transformer natural commutation voltage 170V, in this process, battery current will increase rapidly, reach the maximum current 190A of battery when 170V; The rapid adjustment that utilizes current transformer here at the magnitude of voltage of 170V and carry out current limliting operation, guarantees that the step of battery current changes in the rated range of battery and current transformer by voltage stabilization.
More than the method for doing according to the battery of certain model wherein, the difference of battery size, its electric current and voltage also changes as required.
That these apparatus and method have is cost-saving, floor space is little, charging rate is fast, the advantage such as convenient for installation and maintenance, so segmented initial charge method has very large advantage in battery energy storage system.
Claims (1)
1. energy-storage system battery initial charge device, is characterized in that: this device can start battery to charge from no-voltage, and device comprises transformer, current transformer and the battery of connecting circuit; Transformer is connected to current transformer by the first contactor (KM1), current transformer is connected to battery and is formed loop with battery by two circuits of parallel connection, and the circuit of described parallel connection is in parallel with the 5th contactor (KM5) again after current-limiting resistance (R21) is connected with the 6th contactor (KM6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320607920.0U CN203522297U (en) | 2013-09-29 | 2013-09-29 | Initial charging device of energy storage system cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320607920.0U CN203522297U (en) | 2013-09-29 | 2013-09-29 | Initial charging device of energy storage system cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203522297U true CN203522297U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320607920.0U Expired - Fee Related CN203522297U (en) | 2013-09-29 | 2013-09-29 | Initial charging device of energy storage system cell |
Country Status (1)
| Country | Link |
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| CN (1) | CN203522297U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887809A (en) * | 2014-04-08 | 2014-06-25 | 青岛威控电气有限公司 | Energy storage current transformer for energy storage system |
| CN104753154A (en) * | 2013-09-29 | 2015-07-01 | 沈阳融华新能源电气有限公司 | Initial charging device and method of energy storage system battery |
-
2013
- 2013-09-29 CN CN201320607920.0U patent/CN203522297U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753154A (en) * | 2013-09-29 | 2015-07-01 | 沈阳融华新能源电气有限公司 | Initial charging device and method of energy storage system battery |
| CN103887809A (en) * | 2014-04-08 | 2014-06-25 | 青岛威控电气有限公司 | Energy storage current transformer for energy storage system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20190929 |