CN200979996Y - An equalization series connection charging circuit of Li-ion battery series - Google Patents
An equalization series connection charging circuit of Li-ion battery series Download PDFInfo
- Publication number
- CN200979996Y CN200979996Y CN 200620140534 CN200620140534U CN200979996Y CN 200979996 Y CN200979996 Y CN 200979996Y CN 200620140534 CN200620140534 CN 200620140534 CN 200620140534 U CN200620140534 U CN 200620140534U CN 200979996 Y CN200979996 Y CN 200979996Y
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- equalization
- battery group
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to an equalization series charging circuit of a lithium ion group battery, installing an input power portion, a lithium ion group battery, a checking and controlling portion and an equalization and execution portion, wherein the input power portion is parallel connected with the lithium ion group battery, the checking and controlling portion and the equalization and execution portion. The lithium ion group battery, the checking and controlling portion and the equalization and execution portion of the utility model make up a charging unit, wherein the lithium ion group battery, the checking and controlling portion and the equalization and execution portion are parallel connected together, while the every charging unit is series connected together, and all charging unit is parallel connected with the input power portion, wherein the number of the charging unit is 10. Compared with prior art, the utility model has the advantages of fair designed structure, high equalization efficiency, good expandable ability and low cost, and improving the availability ratio and the service life of the lithium ion group battery.
Description
Technical field:
The utility model relates to the charging circuit of a kind of balanced serial connection charge to lithium ion battery group energy, and it is applicable to that mainly the lithium ion battery group reaches the equilibrium of the energy content of battery in the serial connection charge process.
Technical background:
The lithium ion battery group is present topmost secondary energy sources in product scopes such as notebook computer, mobile digital product, mobile communication equipment, mobile DVD and electrokinetic cell, and the modes of most employing lithium ion battery series connection in these fields are to satisfy the demand of product.Be subjected to manufacturing process, raw material or the like influence of various factors, unavoidably there is certain difference between each unit of lithium ion battery group during series connection, while is along with the increase of battery charging and discharging number of times, this species diversity can be increasing, finally cause reduce greatly the useful life of battery product, the energy of lithium ion battery group can not be given full play on the one hand, has wasted the energy, on the other hand, also caused the existence of the factors of instability.Therefore, be focus in the industry to the research of lithium ion battery group balancing energy always, and propose multiple equalization methods.Popular equalization methods has following three kinds in the industry at present:
1, reference voltage comparison method
The main thought of this method provides one group of reference voltage corresponding to the cascaded lithium ion batteries group, utilize the sample circuit in the calibration software control equalizing circuit of inserting in advance in the equalizing circuit to sample, measure the magnitude of voltage of each corresponding node respectively, compare with reference voltage value, obtain the correction parameter of each divider resistance, store this group correction parameter, when equalizing circuit is gathered voltage, utilize correction parameter to proofread and correct.
Adopt the method to proofread and correct, though reduced the workload when overhauling, owing to adopt the benchmark comparative approach, along with increasing of cascaded lithium ion batteries group number of unit, its cumulative errors can be increasing, also exists the defective of autgmentability difference in addition, it adopts software control, and is bigger from power consumption.
2, the balancing energy method of even number cascaded lithium ion batteries group
The main thought of this method is to be one group with even number cascaded lithium ion batteries group to carry out equilibrium, obtain the median of voltage difference between the anode of this even number cascaded lithium ion batteries group and negative terminal, compare with the intermediate ends point voltage of this even number cascaded lithium ion batteries group, when middle threshold voltage is higher than the intermediate ends point voltage, lithium ion battery group more than the middle end points is discharged, when middle threshold voltage is lower than the intermediate ends point voltage, lithium ion battery group below the middle end points is discharged, make that middle end points is above and the electric weight equilibrium of the lithium ion battery group that middle end points is following.
The method has fabulous extensibility, but its narrow application range (not being suitable for the balancing energy of odd number cascaded lithium ion batteries group unit), the unbalanced defective of each lithium ion battery group when still having discharge in addition.
3, charge independence method
The main thought of this method is that each the lithium ion battery group unit in the cascaded lithium ion batteries group is carried out charge independence.
The method has equalization characteristic preferably, but the circuit structure complexity, and autgmentability is relatively poor relatively, and to the coherence request height of charge circuit, cost is also higher simultaneously.
Summary of the invention:
Technical problem to be solved in the utility model is to overcome above shortcomings in the prior art, and provide a kind of lithium ion battery group balanced serial connection charge circuit, thereby realize that the difference between each cascaded lithium ion batteries group tapers to minimum, thereby improve the consistency between the cascaded lithium ion batteries group, reach and give full play to each lithium ion battery group energy, improve the purpose in useful life.
The technical scheme that the utility model solves the problems of the technologies described above is: the balanced serial connection charge circuit of this lithium ion battery group, it is characterized in that being provided with input power unit, lithium ion battery group, detect control section, balanced operating part, input power unit and lithium ion battery group, detection control section, balanced operating part are connected in parallel.
Lithium ion battery group described in the utility model, detection control section, balanced operating part are formed a charhing unit, lithium ion battery group in the charhing unit, detection control section, balanced operating part are connected in parallel, be connected in series between the charhing unit, all charhing unit is connected in parallel with the input power unit.
Charhing unit described in the utility model is 10.
The utility model compared with prior art has the following advantages and effect: reasonable in design, and balanced efficient height, extensibility is good, and cost is low, has improved the utilization ratio and the useful life of lithium ion battery group.
Description of drawings:
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the circuit diagram of the utility model embodiment.
Embodiment:
The balanced serial connection charge circuit of the utility model embodiment lithium ion battery group is made up of lithium ion battery group I, detection control section II, balanced operating part III, input power unit IV, and input power unit and lithium ion battery group I, detection control section II, balanced operating part III are connected in parallel.
The lithium ion battery group I of the utility model embodiment, detection control section II, balanced operating part III form a charhing unit, lithium ion battery group I in the charhing unit, detection control section II, balanced operating part III are connected in parallel, be connected in series between the charhing unit, all charhing unit is connected in parallel with input power unit IV.
The charhing unit of the utility model embodiment can be set with possibility according to actual needs, and present embodiment is 10.Lithium ion battery group I is made up of one group of battery B1, B2, Bn-1, Bn that is connected in series, at this moment n=10.
Input power unit IV to lithium ion battery group I charging process in, detect the voltage that control section II monitors each series-connected cell among the lithium ion battery group I in real time, when a certain unit in detecting lithium ion battery group I or the voltage of multi-unit battery surpass reservation threshold (this threshold values equals or be slightly larger than the constant voltage charge value of battery), detecting control section II transmits control signal to balanced operating part III, balanced operating part III starts the shunting circuit (shunt current is less than the charging cut-off current) of corresponding units battery, and unnecessary portion of energy is consumed from balanced operating part III.Along with the passing in charging interval, the voltage of all series-connected cells raises gradually and reaches consistent.
Input power unit IV of the present utility model has the constant current/constant voltage charge function and battery is full of back automatic cut-off function.Detection control section II of the present utility model is provided with voltage detecting, state-detection and balanced control.
Claims (3)
1, the balanced serial connection charge circuit of a kind of lithium ion battery group, it is characterized in that: be provided with input power unit, lithium ion battery group, detect control section, balanced operating part, input power unit and lithium ion battery group, detection control section, balanced operating part are connected in parallel.
2, the balanced serial connection charge circuit of lithium ion battery group according to claim 1, it is characterized in that: described lithium ion battery group, detection control section, balanced operating part are formed a charhing unit, lithium ion battery group in the charhing unit, detection control section, balanced operating part are connected in parallel, be connected in series between the charhing unit, all charhing unit is connected in parallel with the input power unit.
3, the balanced serial connection charge circuit of lithium ion battery group according to claim 2, it is characterized in that: described charhing unit is 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620140534 CN200979996Y (en) | 2006-11-30 | 2006-11-30 | An equalization series connection charging circuit of Li-ion battery series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620140534 CN200979996Y (en) | 2006-11-30 | 2006-11-30 | An equalization series connection charging circuit of Li-ion battery series |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200979996Y true CN200979996Y (en) | 2007-11-21 |
Family
ID=38980379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620140534 Expired - Fee Related CN200979996Y (en) | 2006-11-30 | 2006-11-30 | An equalization series connection charging circuit of Li-ion battery series |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200979996Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582594B (en) * | 2008-05-16 | 2011-07-27 | 富港电子（东莞）有限公司 | Charging control circuit |
| WO2014067393A1 (en) * | 2012-10-30 | 2014-05-08 | 恩力能源科技（南通）有限公司 | Circuit, method, device, and energy storage system for balancing battery energy |
-
2006
- 2006-11-30 CN CN 200620140534 patent/CN200979996Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582594B (en) * | 2008-05-16 | 2011-07-27 | 富港电子（东莞）有限公司 | Charging control circuit |
| WO2014067393A1 (en) * | 2012-10-30 | 2014-05-08 | 恩力能源科技（南通）有限公司 | Circuit, method, device, and energy storage system for balancing battery energy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2769900Y (en) | Accumulator battery on-line monitoring system | |
| CN108649593B (en) | Multi-energy-storage-unit coordination control method based on charge state in direct-current microgrid | |
| CN104014491A (en) | Screening method of parallel lithium ion batteries | |
| CN104269574B (en) | A kind of set of cells method for separating | |
| CN102163854A (en) | Charge-discharge equalizing circuit of multi-monomer tandem dynamic lithium battery | |
| CN105429212A (en) | Battery pack voltage equalization control circuit and battery management equipment | |
| CN1667909A (en) | Battery equalization method and battery equalization circuit | |
| CN202014116U (en) | Battery group automatic balancing circuit | |
| CN2790010Y (en) | Executive circuit of lithium charging battery charging and discharging equalizing circuit | |
| CN201750186U (en) | Battery pack charging device | |
| CN201629586U (en) | Battery equalizing charge device | |
| CN200979996Y (en) | An equalization series connection charging circuit of Li-ion battery series | |
| CN209730842U (en) | A kind of fining dynamic reconfigurable battery cell monitoring management system | |
| CN206195347U (en) | Electric wire netting energy storage system | |
| CN203205895U (en) | Lithium battery energy balance control system | |
| CN201398088Y (en) | Battery balanced circuit and power supply system | |
| CN204597550U (en) | A kind of battery pack with stand-by unit | |
| CN205355195U (en) | Power battery organizes structure | |
| CN102570551A (en) | Battery pack equalizing device with radiating function | |
| CN104734263B (en) | A kind of sharing control system and method | |
| CN108512262B (en) | Energy storage battery management system and equalization method and device thereof | |
| CN201854071U (en) | Battery pack charging management system | |
| CN204441937U (en) | Multi-channel parallel lithium battery group management control device | |
| CN2814766Y (en) | Battery equalizing circuit | |
| CN211089180U (en) | Battery pack charging and discharging management circuit and battery management system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071121 Termination date: 20111130 |