CN102820678B - Charge management method for novel iron phosphate lithium batteries - Google Patents
Charge management method for novel iron phosphate lithium batteries Download PDFInfo
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- CN102820678B CN102820678B CN201110151048.9A CN201110151048A CN102820678B CN 102820678 B CN102820678 B CN 102820678B CN 201110151048 A CN201110151048 A CN 201110151048A CN 102820678 B CN102820678 B CN 102820678B
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Abstract
The invention relates a charge management method for novel iron phosphate lithium batteries. The nominal voltage and the battery capacity of an iron phosphate lithium battery are respectively set as Un and C, the iron phosphate lithium battery is dynamically charged according to a charging curve of the iron phosphate lithium battery, and the charging curve is provided with a first current conversion time T1, a second current conversion time T2, a third current conversion time T3 and a fourth current conversion time T4; shallow-charging and shallow-discharging of the iron phosphate lithium battery are realized to avoid high multiplying power charging and discharging, thereby physical property and chemical property of the iron phosphate lithium battery are maintained, and the iron phosphate lithium battery is enabled to have the advantages of large inputting and outputting powers, wide working temperature range, no memory effect, ultralong service life with more than 2000 times of charging, environmental-friendliness, outstanding floating property and the like, can be utilized to the field of backup power sources for transformer stations, and can meet requirements of the transformer stations for increasing intelligentization and automation.
Description
Technical field
The present invention relates to battery charging control method, more particularly, relate to a kind of novel ferric phosphate lithium cell charging management method.
Background technology
What the station DC power system of current transformer station mainly adopted is lead-acid battery, although lead-acid battery technology is updated, but still it is short to there is the life-span, and maintenance workload is large, and current margin is little, responsive to variations in temperature.Along with the popularization of unattended operation transformer station and the raising of transformer substation system automatization level, to the performance of battery with safe and reliablely propose requirements at the higher level, lead-acid battery is because self performance weakness progressively increases the hidden danger that transformer station direct current system causes
Ferric phosphate lithium cell is the novel secondary power supply that new development is in recent years got up, its major advantage is that input-output power is large, operating temperature range is wide, memory-less effect, reach the extra long life environmental protection of more than 2000 times and the feature such as floating charge characteristic is outstanding, be widely used in electric automobile and energy-accumulating power station field, but because during its high power charging-discharging, actual specific capacity is low, although so ferric phosphate lithium cell has above-mentioned multiple advantages, but be applied in back-up source field, when particularly the station of transformer station is with back-up source field, advantage is not obvious, effectively can not carry out the shallow of ferric phosphate lithium cell and fill shallow putting, easily there is the situation of high magnification charge and discharge, thus effectively can not maintain physical characteristic and the chemical characteristic of ferric phosphate lithium cell.
Summary of the invention
The technical problem to be solved in the present invention is, effectively can not carry out the shallow of ferric phosphate lithium cell for prior art and fill shallow putting, easily there is the situation of high magnification charge and discharge, thus effectively can not maintain the defect such as physical characteristic and chemical characteristic of ferric phosphate lithium cell, a kind of novel ferric phosphate lithium cell charging management method is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of novel ferric phosphate lithium cell charging management method, rated voltage and the battery capacity of described ferric phosphate lithium cell are respectively Un and C, charging curve according to described ferric phosphate lithium cell dynamically charges to it, and described charging curve has the first commutation time point T1, the second commutation time point T2, the 3rd commutation time point T3 and the 4th commutation time point T4; Wherein,
Within T0 to the T1 time period, charge to described ferric phosphate lithium cell with constant charging current, now, charging voltage slowly rises, and when arriving T1 time point, described charging voltage will reach 1.1Un;
Within T1 to the T2 time period, in the charging process to described ferric phosphate lithium cell, progressively reduce described charging current;
Within T2 to the T3 time period, in the charging process to described ferric phosphate lithium cell, progressively improve described charging voltage, and keep charging current constant;
Within T3 to the T4 time period, in the charging process to described ferric phosphate lithium cell, progressively reduce described charging current, and keep charging voltage constant.
In novel ferric phosphate lithium cell charging management method of the present invention, within T0 to the T1 time period, with the charging current of 0.1C, described ferric phosphate lithium cell is charged.
In novel ferric phosphate lithium cell charging management method of the present invention, within T1 to the T2 time period, described charging current is progressively reduced to 0.02C.
In novel ferric phosphate lithium cell charging management method of the present invention, within T2 to the T3 time period, described charging voltage is progressively brought up to 1.15Un, and keep charging current constant in 0.02C.
In novel ferric phosphate lithium cell charging management method of the present invention, within T3 to the T4 time period, progressively reduce described charging current to 0, and keep charging voltage to be 1.15Un.
In novel ferric phosphate lithium cell charging management method of the present invention, after being also included in the T4 time, floating charge is carried out to described ferric phosphate lithium cell.
In novel ferric phosphate lithium cell charging management method of the present invention, in described float, maintaining charging current is 0, and after charging voltage is progressively reduced to 1.1Un, maintenance charging voltage is 1.1Un.
Implement novel ferric phosphate lithium cell charging management method of the present invention, there is following beneficial effect: realize the shallow of ferric phosphate lithium cell and fill shallow putting, avoid the situation occurring high magnification charge and discharge, thus maintain physical characteristic and the chemical characteristic of ferric phosphate lithium cell, make that ferric phosphate lithium cell input-output power is large, operating temperature range is wide, memory-less effect, reach the extra long life environmental protection of more than 2000 times and the back-up source field of feature can the apply to transformer station such as floating charge characteristic is outstanding, meet that transformer station is day by day intelligent, the requirement of automation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the flow chart of novel ferric phosphate lithium cell charging management method first embodiment of the present invention;
Fig. 2 is the flow chart of novel ferric phosphate lithium cell charging management method second embodiment of the present invention;
Fig. 3 is the schematic diagram of the charging curve of ferric phosphate lithium cell of the present invention;
Fig. 4 is the schematic diagram of the charging curve of the ferric phosphate lithium cell with specific rated voltage and battery capacity.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1 in first embodiment and the second embodiment of novel ferric phosphate lithium cell charging management method of the present invention, its mainly according to the charging curve of ferric phosphate lithium cell to its control of dynamically charging, namely as shown in Figure 3 with the first commutation time point T1 of charging curve, second commutation time point T2, 3rd commutation time point T3 and the 4th commutation time point T4, namely with four of the charging curve of ferric phosphate lithium cell flex points for boundary carry out charge conversion control, thus carry out personalization charging according to the characteristic of different ferric phosphate lithium cells, realize the shallow of ferric phosphate lithium cell and fill shallow putting, avoid the situation occurring high magnification charge and discharge, thus maintain physical characteristic and the chemical characteristic of ferric phosphate lithium cell, make ferric phosphate lithium cell input-output power large, operating temperature range is wide, memory-less effect, reach the extra long life environmental protection of more than 2000 times and the back-up source field of feature can the apply to transformer station such as floating charge characteristic is outstanding, meet transformer station day by day intelligent, the requirement of automation.
In the first embodiment as shown in Figure 1, for a specific ferric phosphate lithium cell, its rated voltage and battery capacity are respectively Un and C, and concrete charging control flow is:
S11: within T0 to the T1 time period, namely in the scope between the first flex point being charged to charging curve from just, with constant charging current, described ferric phosphate lithium cell is charged, now, charging voltage slowly rises, herein for the size of charging current and charging voltage, Un and C can be respectively according to rated voltage and battery capacity, choose, when arriving T1 time point, charging voltage will reach 1.1Un.General, the charging current in this stage can the size of 0.05C ~ 0.2C, and preferably, charging current is 0.1C.
S12: within T1 to the T2 time period, namely between first flex point and Second Inflexion Point of charging curve, the charging carrying out different previous stage is controlled, in this stage in the charging process of ferric phosphate lithium cell, progressively reduce charging current, because the time interval between this T1 and T2 is shorter, therefore, very fast the lower general who has surrendered of this stage charging current, control charging voltage continues to rise, to guarantee having enough pressure reduction to charge to ferric phosphate lithium cell along with the rising of cell voltage by the recharging converter simultaneously in charging device; In the process, the slope for the decline curve of charging current is determined according to the time interval between the size of charging current when reaching T2 time point and T1 and T2.Such as, can by when arriving T2 time point, charging current drops to 0.01C ~ 0.03C, and preferred charging current drops to 0.02C.
S13: within T2 to the T3 time period, namely between the Second Inflexion Point and the 3rd flex point of charging curve, another charging will be carried out control, in the charging process in this stage, by maintenance charging current in a less charge value, such as charging current can be 0.01C ~ 0.03C, and preferably, charging current is 0.02C.Now, control charging voltage progressively rises by the recharging converter in charging device, and such as, when arriving T3 time point, charging voltage will reach 1.1Un ~ 1.2Un, and preferably, when arriving T3 time point, charging voltage will reach 1.15Un.
S14: within T3 to the T4 time period, namely between the 3rd flex point and the 4th flex point of charging curve, again conversion charging is controlled, this stage progressively will reduce charging current, charging current can be reduced to 0 from 0.02C, and keep charging voltage constant, preferably, keeping charging voltage constant is 1.15Un.
In the second embodiment as shown in Figure 2, for a specific ferric phosphate lithium cell, its rated voltage and battery capacity are respectively Un and C, and concrete charging control flow is:
S21: within T0 to the T1 time period, namely in the scope between the first flex point being charged to charging curve from just, with constant charging current, described ferric phosphate lithium cell is charged, now, charging voltage slowly rises, herein for the size of charging current and charging voltage, Un and C can be respectively according to rated voltage and battery capacity, choose, when arriving T1 time point, charging voltage will reach 1.1Un, general, the charging current in this stage can the size of 0.05C ~ 0.2C, and preferably, charging current is 0.1C.
S22: within T1 to the T2 time period, namely between first flex point and Second Inflexion Point of charging curve, the charging carrying out different previous stage is controlled, in this stage in the charging process of ferric phosphate lithium cell, progressively reduce charging current, because the time interval between this T1 and T2 is shorter, therefore, very fast the lower general who has surrendered of this stage charging current, control charging voltage continues to rise, to guarantee having enough pressure reduction to charge to ferric phosphate lithium cell along with the rising of cell voltage by the recharging converter simultaneously in charging device; In the process, the slope for the decline curve of charging current is determined according to the time interval between the size of charging current when reaching T2 time point and T1 and T2.Such as, can by when arriving T2 time point, charging current drops to 0.01C ~ 0.03C, and preferred charging current drops to 0.02C.
S23: within T2 to the T3 time period, namely between the Second Inflexion Point and the 3rd flex point of charging curve, another charging will be carried out control, in the charging process in this stage, by maintenance charging current in a less charge value, such as charging current can be 0.01C ~ 0.03C, and preferably, charging current is 0.02C.Now, control charging voltage progressively rises by the recharging converter in charging device, and such as, when arriving T3 time point, charging voltage will reach 1.1Un ~ 1.2Un, and preferably, when arriving T3 time point, charging voltage will reach 1.15Un.
S24: within T3 to the T4 time period, namely between the 3rd flex point and the 4th flex point of charging curve, again conversion charging is controlled, this stage progressively will reduce charging current, charging current can be reduced to 0 from 0.02C, and keep charging voltage constant, preferably, keeping charging voltage constant is 1.15Un.
S25: after T4 time point, will proceed to the floating charge stage to ferric phosphate lithium cell, and now, charging current can be held constant at 0, charged electrical pressure drop is progressively reduced to 1.1Un from 1.15Un, and charging voltage will be kept after reaching 1.1Un constant.If this ferric phosphate lithium cell does not discharge always, fill T4 time point and start timing, after 180 days, the charging restarting step S21 ~ S24 is controlled.If ferric phosphate lithium cell has electric discharge, once electric discharge terminates, the charging restarting step S21 ~ S24 is controlled.
As shown in Figure 4, be 110V for rated voltage Un, battery capacity is the ferric sulfate lithium battery of 300AH, and its concrete charging control flow is:
Within 0 ~ 9h time period, carry out constant current charge with the charging current of 30A, now, charging voltage is slow rising from specified 110V, to maintain constant charge current.
Within 9h ~ 10h time period, carry out boost charge.This stage charging current reduces rapidly, and recharging converter will control charging voltage, continues to rise along with the rising of cell voltage, to guarantee having enough pressure reduction to charge the battery, when battery current reaches about 6A time, completes the charging of this stage.
Within 10h ~ 10.8h time period, carry out small area analysis constant current charge, battery maintains the charging current of 6A.Control charging voltage progressively rises by recharging converter, and when charging voltage reaches about 127V, the charging of this stage terminates.
Within 10.8h ~ 11.2h time period, this stage is constant voltage charge, and recharging converter will control charging voltage at about 127V, and battery charge quickly falls to 0 from 6A.
11.2h will carry out floating charge later, and this stage battery charge is constant is 0, and control charging voltage progressively declines by recharging converter, when charging voltage drops to about 120V, maintains constant float charge voltage.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a novel ferric phosphate lithium cell charging management method, rated voltage and the battery capacity of described ferric phosphate lithium cell are respectively Un and C, it is characterized in that, charging curve according to described ferric phosphate lithium cell dynamically charges to it, and described charging curve has the first commutation time point T1, the second commutation time point T2, the 3rd commutation time point T3 and the 4th commutation time point T4; Wherein,
Within T0 to the T1 time period, with constant charging current, described ferric phosphate lithium cell is charged, now, charging voltage slowly rises, when arriving T1 time point, described charging voltage will reach 1.1Un, and the span of the charging current in this stage is 0.05C ~ 0.2C;
Within T1 to the T2 time period, in the charging process to described ferric phosphate lithium cell, progressively reduce described charging current, described charging current is progressively reduced to 0.01C ~ 0.03C;
Within T2 to the T3 time period, in the charging process to described ferric phosphate lithium cell, progressively improve described charging voltage, and keep charging current constant, described charging current is constant is a preset value, the span of described preset value is 0.01C ~ 0.03C, and when arriving T3 time point, described charging voltage will reach 1.1Un ~ 1.2Un;
Within T3 to the T4 time period, in the charging process to described ferric phosphate lithium cell, progressively reduce described charging current, and keep charging voltage constant;
After the T4 time, floating charge is carried out to described ferric phosphate lithium cell;
In described float, maintaining charging current is 0, and after charging voltage is progressively reduced to 1.1Un, maintenance charging voltage is 1.1Un;
After charging complete, if described ferric phosphate lithium cell does not discharge always, then timing from the T4 time, will restart the charging cycle of T0 ~ T4 after 180 days; If battery has electric discharge, once electric discharge terminates, the charging cycle of T0 ~ T4 will be restarted.
2. ferric phosphate lithium cell charging management method novel as claimed in claim 1, is characterized in that, within T0 to the T1 time period, with the charging current of 0.1C, charges to described ferric phosphate lithium cell.
3. ferric phosphate lithium cell charging management method novel as claimed in claim 1, is characterized in that, within T1 to the T2 time period, described charging current is progressively reduced to 0.02C.
4. ferric phosphate lithium cell charging management method novel as claimed in claim 1, is characterized in that, within T2 to the T3 time period, described charging voltage is progressively brought up to 1.15Un, and keeps charging current constant in 0.02C.
5. ferric phosphate lithium cell charging management method novel as claimed in claim 1, is characterized in that, within T3 to the T4 time period, progressively reduces described charging current to 0, and keeps charging voltage to be 1.15Un.
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| CN106487057A (en) * | 2016-06-30 | 2017-03-08 | 龙彩霞 | The solar charger according to user-defined curve running and its control method |
| CN106685002A (en) * | 2017-01-16 | 2017-05-17 | 郑州云海信息技术有限公司 | Lithium battery charging management method and device |
| CN108399578B (en) * | 2017-10-26 | 2019-11-15 | 蔚来汽车有限公司 | Electrical changing station service ability predictor method and device |
| CN109709493A (en) * | 2018-12-29 | 2019-05-03 | 北京长城华冠汽车科技股份有限公司 | The test method and test macro of service life of lithium battery |
| CN112224023B (en) * | 2020-10-15 | 2022-06-28 | 中车唐山机车车辆有限公司 | High-speed motor train unit storage battery charging protection method |
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| JPH0778637A (en) * | 1993-09-08 | 1995-03-20 | Matsushita Electric Ind Co Ltd | Charging method for lead-acid battery |
| JP3209039B2 (en) * | 1995-05-30 | 2001-09-17 | 新神戸電機株式会社 | How to charge lead storage batteries |
| CN1349274A (en) * | 2000-10-18 | 2002-05-15 | 北京嘉昌机电设备制造有限公司 | Comprehensive charge mode |
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