CN102544608A - Full-charging static balancing method and system for automobile lithium battery - Google Patents
Full-charging static balancing method and system for automobile lithium battery Download PDFInfo
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- CN102544608A CN102544608A CN2010106200111A CN201010620011A CN102544608A CN 102544608 A CN102544608 A CN 102544608A CN 2010106200111 A CN2010106200111 A CN 2010106200111A CN 201010620011 A CN201010620011 A CN 201010620011A CN 102544608 A CN102544608 A CN 102544608A
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- cell
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- lithium battery
- automobile lithium
- static balancing
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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 invention belongs to the technical field of power battery management, and particularly discloses a full-charging static balancing method and system for an automobile lithium battery. The invention provides a method and a system for realizing balance specific to the full-charging state of a battery pack. A compensating power supply is loaded onto the two ends of each monomer battery respectively for performing compensating charge after the battery pack is charged till all the monomer batteries are charged fully. After the battery pack is charged, a measure for performing further compensating charge is added, and each monomer battery in the battery pack can be in a full-changed state, so that the difference among the monomer batteries is further reduced, and the service life of the battery pack is prolonged.
Description
Technical field
The invention belongs to electrokinetic cell administrative skill field, be specifically related to a kind of automobile lithium battery and be full of static balancing method and balance sysmte.
Background technology
The state of automobile lithium battery is divided into charged state, is full of static state and discharge condition, and the said static state that is full of is meant: after the external power charging at battery pack two ends finished, charger still was connected the situation at battery pack two ends.
The requirement of voltage, power and energy when moving for reaching powerful devices such as electric automobile, battery pack is many to compose in series use by a large amount of electrokinetic cells.Though along with the raising of technical matters, the difference between the battery reduces gradually,, under current manufacture craft level, it is in full accord still to cannot say for sure to demonstrate,prove every batteries characteristic.Especially under the operating mode service conditions, carry out irregular charging, discharge continually, the difference after battery pack work a period of time between the battery can worsen, thereby, make the service efficiency of battery pack reduce, the life-span reduces.
Inconsistency between the battery can not be eliminated fully, and especially this inconsistency is at the beginning of it is produced, just to exist.In order to ensure the application life of battery pack, battery management system just arises at the historic moment, and its groundwork is exactly to find the difference between the battery and dwindle just common alleged cell balancing.
At present, all be through one road external direct current power supply to automobile reason battery charge, be carried in the battery pack two ends to whole battery group turnover charging, when batteries charging reached capacity state, external direct current power supply just had no idea battery pack to be charged again.
Though; The voltage at some the cell two ends in the battery pack has reached 4.2V; But possible these cells still are not full of fully, if it is not completely filled, possibly repeatedly further amplify in discharge, the charging process repeatedly afterwards; Aggravate the inconsistency between each cell, and then influence the life-span of battery pack.
Summary of the invention
In order to address the above problem; First purpose of the present invention is to provide a kind of automobile lithium battery that each cell is all reached completely fill to be full of the static balancing method, and second purpose of the present invention is to provide a kind of and said automobile lithium battery to be full of the corresponding balance sysmte of static balancing method.
For realizing first purpose of the present invention, technical scheme that the present invention adopts is following:
A kind of automobile lithium battery is full of the static balancing method, the difference when being used for balance automobile lithium battery group and being in static state between each cell, and said battery pack comprises a plurality of cells that are cascaded; Said batteries charging loads an offset supply respectively at each cell two ends each cell is compensated charging, till all cells are full of fully after finishing.
Said automobile lithium battery is full of in the static balancing method, and the discriminating step that said cell is full of fully is following:
Gather the current signal at said cell two ends;
The current value at said cell two ends is compared with preset current threshold, and less than said current threshold, then said cell is in complete fully charged state like said current value.
For realizing second purpose of the present invention, technical scheme that the present invention adopts is following:
A kind of automobile lithium battery is full of the static balancing system; Difference when being used for balance automobile lithium battery group and being in quiet state between each cell; Said battery pack comprises a plurality of cells that are cascaded, and adds an external direct current power supply at said battery pack two ends and charges;
This balance sysmte comprises: slave computer, host computer, switching circuit and DC-DC DC transfer circuit; The input of said DC-DC DC transfer circuit is electrically connected with said external direct current power supply, and its output is connected with each cell through a said switching circuit, to each cell turnover compensating charge; Said slave computer is connected with the two ends of each said cell, gathers the current signal at each said cell two ends, and is transferred to said host computer; The current value of first cell that receives like said host computer is less than the current threshold of setting; Said switching circuit of then said PC control and said DC-DC DC transfer circuit stop said first cell is compensated charging, till the current value at all cell two ends is all less than the current threshold of setting.
Said automobile lithium battery is full of the static balancing system, on said host computer, also is connected with a temperature sensor.
Said automobile lithium battery is full of the static balancing system, on said host computer, also is provided with a display module.
Said automobile lithium battery is full of the static balancing system, and said slave computer is PLC or single-chip microcomputer.
Said automobile lithium battery is full of the static balancing system, and said host computer is one to include the main control module of CPU.
Said automobile lithium battery is full of the static balancing system, and said switching circuit is a FET.
The present invention finishes back (promptly be: the external direct current power supply that is carried in the battery pack two ends is had no idea again when battery pack pours into electric current) at batteries charging; Load an offset supply respectively at each cell two ends each cell is compensated charging; The cell that is not full of can further be full of; Thereby make in the each again charging process of all cells, can both be full of fully.
The present invention is on the basis of an existing external DC power supply for the charging of integral battery door group; The compensating charge power supply of being connected with switching circuit and being constituted by the DC-DC DC transfer circuit that superposeed at each cell two ends is mended for each cell that is not full of separately.
Slave computer, host computer, switching circuit and DC-DC DC transfer circuit that the present invention is full of in the static balancing system all are the hardware units that cooperates the inventive method.
The present invention has increased the measure of further compensating charge after batteries charging finishes, make that each cell in the battery pack can both reach fully charged state, thereby further dwindled the difference between each cell, prolongs the useful life of battery pack.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is a schematic block circuit diagram of the present invention.
1, battery pack 11, cell
2, slave computer 3, host computer
31, display module 4, DC-DC DC transfer circuit
5, switching circuit 6, temperature sensor
7, external direct current power supply
Embodiment
To combine accompanying drawing and specific embodiment to specify the present invention below, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as to qualification of the present invention.
Embodiment 1:
Present embodiment discloses a kind of automobile lithium battery and has been full of the static balancing method, the difference when being used for balance automobile lithium battery group and being in static state between each cell, and said battery pack comprises a plurality of cells that are cascaded; Said batteries charging loads an offset supply respectively at each cell two ends each cell is compensated charging, till all cells are full of fully after finishing; The discriminating step that said cell is full of fully is following:
Step1: the current signal of gathering said cell two ends; Concrete acquisition mode can adopt single-chip microcomputer or PLC etc. to connect the two ends of each cell; Gather the current signal at each cell two ends in real time, convert the analog signal that is collected into digital signal that computer can be discerned through some conventional means such as amplification, digital-to-analogue conversions then;
Step2: the current value and the preset current threshold at said cell two ends are compared, and less than said current threshold, then said cell is in complete fully charged state like said current value; Said current threshold is consistent with the requirement and the precision of real system, possibly be made as like rational numerical relatively such as 1 milliampere, 0.5 milliampere.
Embodiment 2:
As shown in Figure 1; Present embodiment discloses a kind of automobile lithium battery and has been full of the static balancing system; Difference when being used for balance automobile lithium battery group and being in quiet state between each cell; Said battery pack 1 comprises a plurality of cells that are cascaded 11, adds an external direct current power supply 7 at said battery pack 1 two ends and charges; This balance sysmte comprises: slave computer 2, host computer 3, switching circuit 5 and DC-DC DC transfer circuit 4, and slave computer 2 is PLC or single-chip microcomputer, and host computer 3 is one to include the main control module of CPU, and switching circuit can be FET; The input of said DC-DC DC transfer circuit 4 is electrically connected with said external direct current power supply 7, and its output is connected with each cell 11 through a said switching circuit 5, to each cell 11 turnover compensating charges; Said slave computer 2 is connected with the two ends of each said cell 11, gathers the current signal at each said cell 11 two ends, and is transferred to said host computer 3; The current value of first cell that receives like said host computer 3 is less than the current threshold of setting; The said switching circuit 5 of then said host computer 3 controls stops said first cell is compensated charging with said DC-DC DC transfer circuit 4, till the current value at all cell two ends is all less than the current threshold of setting.
Need to prove; The situation of only schematically having drawn slave computer, a DC-DC DC transfer circuit, two switching circuits among the figure of the present invention, their quantity are that quantity and the actual components and parts that adopted are confirmed according to actual cell, therefore; The invention is not restricted to this; As long as comprise slave computer, switching circuit, DC-DC DC transfer circuit, and the circuit unit or the original paper that are equal to these devices, all be protection scope of the present invention.
As shown in Figure 1, the temperature for further management and control battery pack also is connected with the temperature of a temperature sensor 6 with the monitoring management battery pack on said host computer 3; Ipc monitor management for ease also is provided with a display module 31 on said host computer 3.
The present invention is through host computer 3 control switch circuit 5 and 4 pairs of cells that are not full of fully of DC-DC DC transfer circuit, 11 turnover compensating charges; Make each cell to be full of fully; Dwindle the difference between each cell, thereby prolonged battery pack useful life.
More than the technical scheme that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper the principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. an automobile lithium battery is full of the static balancing method, is used for balance automobile lithium battery group and is in the difference between each cell when being full of static state, and said battery pack comprises a plurality of cells that are cascaded, and it is characterized in that:
Said batteries charging loads an offset supply respectively at each cell two ends each cell is compensated charging, till all cells are full of fully after finishing.
2. automobile lithium battery according to claim 1 is full of the static balancing method, it is characterized in that:
The discriminating step that said cell is full of fully is following:
Gather the current signal at said cell two ends;
The current value at said cell two ends is compared with preset current threshold, and less than said current threshold, then said cell is in complete fully charged state like said current value.
3. an automobile lithium battery is full of the static balancing system; Difference when being used for balance automobile lithium battery group and being in quiet state between each cell; Said battery pack comprises a plurality of cells that are cascaded; Add an external direct current power supply at said battery pack two ends and charge, it is characterized in that:
This balance sysmte comprises: slave computer, host computer, switching circuit and DC-DC DC transfer circuit;
The input of said DC-DC DC transfer circuit is electrically connected with said external direct current power supply, and its output is connected with each cell through a said switching circuit, to each cell turnover compensating charge;
Said slave computer is connected with the two ends of each said cell, gathers the current signal at each said cell two ends, and is transferred to said host computer;
The current value of first cell that receives like said host computer is less than the current threshold of setting; Said switching circuit of then said PC control and said DC-DC DC transfer circuit stop said first cell is compensated charging, till the current value at all cell two ends is all less than the current threshold of setting.
4. automobile lithium battery according to claim 3 is full of the static balancing system, it is characterized in that: on said host computer, also be connected with a temperature sensor.
5. automobile lithium battery according to claim 3 is full of the static balancing system, it is characterized in that: on said host computer, also be provided with a display module.
6. automobile lithium battery according to claim 3 is full of the static balancing system, it is characterized in that: said slave computer is PLC or single-chip microcomputer.
7. automobile lithium battery according to claim 3 is full of the static balancing system, it is characterized in that: said host computer is one to include the main control module of CPU.
8. automobile lithium battery according to claim 3 is full of the static balancing system, it is characterized in that: said switching circuit is a FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106200111A CN102544608A (en) | 2010-12-31 | 2010-12-31 | Full-charging static balancing method and system for automobile lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106200111A CN102544608A (en) | 2010-12-31 | 2010-12-31 | Full-charging static balancing method and system for automobile lithium battery |
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| CN102544608A true CN102544608A (en) | 2012-07-04 |
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| CN2010106200111A Pending CN102544608A (en) | 2010-12-31 | 2010-12-31 | Full-charging static balancing method and system for automobile lithium battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872711A (en) * | 2012-12-13 | 2014-06-18 | 欣旺达电子股份有限公司 | Lithium battery charge and discharge balancing system |
| CN104890532A (en) * | 2015-06-29 | 2015-09-09 | 珠海市广通客车有限公司 | Electrical control system for pure electric bus |
| CN110556888A (en) * | 2018-05-31 | 2019-12-10 | 台北科技大学 | Power supply system and operation method thereof |
| CN110556909A (en) * | 2018-05-31 | 2019-12-10 | 台北科技大学 | Power management system and operation method thereof |
| US10879709B2 (en) | 2018-05-31 | 2020-12-29 | National Taipei University Of Technology | Power management system and operating method thereof |
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| JPH10174304A (en) * | 1996-12-11 | 1998-06-26 | Sanyo Electric Co Ltd | Battery charger and method for charging secondary battery |
| CN1889324A (en) * | 2006-07-13 | 2007-01-03 | 周明亮 | Battery secondary balancing charging apparatus and method |
| CN201341030Y (en) * | 2008-12-30 | 2009-11-04 | 北京凯源新能科技有限公司 | Monitoring and balancing device used for connecting storage battery group in series |
| CN101795015A (en) * | 2010-04-06 | 2010-08-04 | 奇瑞汽车股份有限公司 | Intelligent charging system and charging method of power car lithium battery pack |
-
2010
- 2010-12-31 CN CN2010106200111A patent/CN102544608A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10174304A (en) * | 1996-12-11 | 1998-06-26 | Sanyo Electric Co Ltd | Battery charger and method for charging secondary battery |
| CN1889324A (en) * | 2006-07-13 | 2007-01-03 | 周明亮 | Battery secondary balancing charging apparatus and method |
| CN201341030Y (en) * | 2008-12-30 | 2009-11-04 | 北京凯源新能科技有限公司 | Monitoring and balancing device used for connecting storage battery group in series |
| CN101795015A (en) * | 2010-04-06 | 2010-08-04 | 奇瑞汽车股份有限公司 | Intelligent charging system and charging method of power car lithium battery pack |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872711A (en) * | 2012-12-13 | 2014-06-18 | 欣旺达电子股份有限公司 | Lithium battery charge and discharge balancing system |
| CN103872711B (en) * | 2012-12-13 | 2016-03-09 | 欣旺达电子股份有限公司 | Charging and discharging lithium battery balance sysmte |
| CN104890532A (en) * | 2015-06-29 | 2015-09-09 | 珠海市广通客车有限公司 | Electrical control system for pure electric bus |
| CN110556888A (en) * | 2018-05-31 | 2019-12-10 | 台北科技大学 | Power supply system and operation method thereof |
| CN110556909A (en) * | 2018-05-31 | 2019-12-10 | 台北科技大学 | Power management system and operation method thereof |
| US10879709B2 (en) | 2018-05-31 | 2020-12-29 | National Taipei University Of Technology | Power management system and operating method thereof |
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Application publication date: 20120704 |