CN101471576A - Charging method and apparatus - Google Patents
Charging method and apparatus Download PDFInfo
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- CN101471576A CN101471576A CNA2007103078436A CN200710307843A CN101471576A CN 101471576 A CN101471576 A CN 101471576A CN A2007103078436 A CNA2007103078436 A CN A2007103078436A CN 200710307843 A CN200710307843 A CN 200710307843A CN 101471576 A CN101471576 A CN 101471576A
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Abstract
The invention provides a charging device, wherein, the charging device comprises a controller (4) and a plurality of gating modules (2); the controller (4) is electrically connected with a plurality of gating modules (2) respectively; each gating module (2) is electrically connected with each single battery in a battery pack; the controller (4) is used for controlling each gating module (2) to be selectively communicated with the under-voltage single batteries which are connected therewith in the battery pack; and each gating module (2) is used for being connected with a rechargeable power supply for charging the conducted single batteries. The use of the charging device can realize the voltage balance in a plurality of single batteries, thereby improving the use performance of the battery pack; furthermore, as the charging device can charge the under-voltage signal batteries in each battery pack connected with the gating modules (2) in parallel, the charging device effectively shortens the time for balancing the voltage in a plurality of batteries and enhances the practicality of the device. In addition, the invention further provides a charging method.
Description
Technical field
The present invention relates to charging device, relate in particular to a kind of balanced charging device and balanced charging method that is used for a plurality of batteries.
Background technology
Rechargeable power battery because of its preferably utilance be widely used in each electronic product, especially in the electric automobile.For electric automobile, be provided with the battery pack that a plurality of cells are connected in series and form as supply unit.Because there is voltage differences in the restriction of the process conditions of rechargeable power battery self between each joint cell.Through after the charge and discharge cycle repeatedly, voltage differences between the cell can be increasing, in charging process, cause series battery charge unbalanced easily, make the available capacity of series battery reduce, influence the serviceability of battery pack, this also is the problem that can not be ignored for electric automobile, in addition, if the electric quantity detection apparatus by routine detects the electric weight of each cell successively and under-voltage cell is charged successively, then to expend a large amount of time, therefore, do not have practicality.
Summary of the invention
The objective of the invention is that the unbalanced battery pack available capacity that causes of batteries charging is little, the problem of serviceability difference in order to solve, provide a kind of can find at short notice under-voltage cell and can be simultaneously to the charging device and the charging method of a plurality of under-voltage cells chargings.
The invention provides a kind of charging device, wherein, this charging device comprises controller and a plurality of gating module, and controller is electrically connected with a plurality of gating modules respectively, and each gating module is electrically connected with each cell in the Battery pack; Controller be used for controlling each gating module optionally with the under-voltage cell conducting of coupled battery pack, each gating module is used for being connected with charge power supply, to the cell charging of conducting.
In addition, the present invention also provides a kind of charging method, and wherein, this method may further comprise the steps: a plurality of batteries to be detected are divided into a plurality of battery pack; With the under-voltage cell in each battery pack optionally with the charge power supply conducting, with to this under-voltage cell charging.
Adopt charging device provided by the invention and charging method, at first a plurality of batteries to be detected are divided into a plurality of battery pack, described device can be simultaneously to each battery pack that gating module 2 is connected in cell carry out periodic voltage detecting successively, obtain the actual voltage value of each cell in each battery pack by voltage detecting, the cell that actual voltage value is lower than given lower voltage limit value (promptly under-voltage) charges, and can charge successively to the described under-voltage cell in each battery pack simultaneously, reach given upper voltage limit value up to its actual voltage value and stop charging again, and the cell that actual voltage value is not greater than or equal to given lower voltage limit value charges, make thus after stopping to under-voltage cell charging, the magnitude of voltage of all the under-voltage cells in each battery pack has all reached given magnitude of voltage, promptly realize electric voltage equalization, thereby improved the serviceability of battery pack.In addition, charging device provided by the invention and charging method since can be concurrently to each battery pack that gating module 2 is connected in under-voltage cell charging, promptly simultaneously to belonging to a plurality of under-voltage cell charging of different gating module, thereby shortened time of the voltage of balanced a plurality of batteries effectively, strengthened the practicality of device.
Description of drawings
Fig. 1 is the structural representation of charging device provided by the invention;
The structural representation of the charging device that provides of a kind of preferred implementation according to the present invention is provided Fig. 2;
The flow chart of the charging method that provides of a kind of preferred implementation according to the present invention is provided Fig. 3.
Embodiment
As shown in Figure 1, the invention provides a kind of charging device, wherein, this charging device comprises controller 4 and a plurality of gating module 2, and controller 4 is electrically connected with a plurality of gating modules 2 respectively, and each gating module 2 is electrically connected with each cell in the Battery pack; Controller 4 be used for controlling each gating module 2 optionally with the under-voltage cell conducting of coupled battery pack, each gating module 2 is used for being connected with charge power supply, to the cell charging of conducting.
Described gating module 2 is electrically connected with each cell in the Battery pack, and this Battery pack is the part in a plurality of cells to be detected.Thus, these a plurality of cells to be detected can be divided into many groups by gating module 2.But the operation of described each gating module 2 of controller 4 parallel control, thereby balanced all total times of cell voltage to be detected have been shortened.The quantity of the monomer monomer battery that is connected with a gating module 2 can be set arbitrarily, promptly the battery to be detected of any amount can be divided into one group, the quantity of the cell that each group comprises can be the same or different, in order to shorten balanced required charging total time of whole cells to be detected to greatest extent, be preferably whole cells to be detected is divided into a plurality of battery pack.
The device of described gating module 2 for carrying out disconnection, conducting operation arbitrarily and having conductivity, a preferred embodiment of the invention, described gating module 2 can be many branch roads that comprise gate-controlled switch, one end of described gate-controlled switch links to each other with an end of corresponding cell by lead, and the two ends of each cell all are connected with such branch road, this shows that the number of described branch road Duos 1 than the number of cell.The other end of this gate-controlled switch links to each other with charge power supply by lead, and the two ends of this gate-controlled switch are electrically connected with controller 4 respectively.This gate-controlled switch is a normal open switch, only just conducting when receiving the control signal of its conducting of control that controller 4 sends.
Described controller 4 is connected to each cell two ends to be detected by gating module 2, be used for detecting the voltage of each battery pack cell, voltage according to this cell, determine whether this cell is under-voltage battery, and control each gating module 2 optionally with coupled battery pack in under-voltage cell conducting.This controller 4 be for can carrying out voltage detecting and comparison arbitrarily, and can control that gating module 2 disconnects or the controller of conducting, for example can be PLC or single-chip microcomputer.Under the preferable case, control end with a plurality of gate-controlled switches in controller 4 and the gating module 2 is electrically connected respectively, thereby can be electrically connected the disconnection and the conducting of control gating module 2 by this, and two electrical connections by each cell two ends just detect the actual voltage value of this battery, have realized the multiplexing of circuit thus.
As shown in Figure 2, under the preferable case, described controller 4 comprises level signal detecting unit 8, voltage comparison unit 9 and control unit 10, and level signal detecting unit (8) and control unit (10) also are electrically connected with gating module (2).
Described level signal detecting unit 8 is used to detect the level signal at each cell two ends that each gating module 2 links to each other, and obtains the actual voltage value of described each cell according to level signal, and described actual voltage value is sent to voltage comparison unit 9.Level signal detecting unit 8 respectively with the gating module 2 at each cell two ends in branch road be electrically connected to detect the magnitude of voltage at these battery two ends.The operator can be provided with the voltage detecting order arbitrarily under guaranteeing each cell in a plurality of battery pack is all carried out the prerequisite of voltage detecting.For example, can detect successively from first segment to final section whole cells to be detected, under the preferable case, the voltage detecting order is set at simultaneously each cell in each gating module 2 is detected, in same gating module 2, each the joint cell that begins successively this gating module 2 to be connected from the first segment cell carries out voltage detecting until the final section cell.
Described voltage comparison unit 9 is used for the actual voltage value and the given lower voltage limit value of each cell of each gating module 2 connections are compared, and determines whether this cell is under-voltage battery.Be preset with given lower voltage limit value in the described voltage comparison unit 9, described voltage comparison unit 9 compares the actual voltage value of detected each cell with this given lower voltage limit value, and comparative result is sent to control unit 10.Described given lower voltage limit value can be set in advance in voltage comparison unit 9 by the operator, given lower voltage limit value can be for being higher than the free voltage value that 0V is lower than the cell load voltage value, work long hours at the voltage imbalance for fear of described a plurality of cells to be detected, under the preferable case, the 50%-90% that described given lower voltage limit value is described cell load voltage value.
Described control unit 10 is used for controlling each gating module 2 and the under-voltage cell conducting that links to each other according to the comparative result of voltage comparison unit 9.Gating module 2 disconnections that control linked to each other with this under-voltage cell when in addition, control unit 10 also was used for actual voltage value at described under-voltage cell and reaches given upper voltage limit value.Described given upper voltage limit value can be set in advance in voltage comparison unit 9 by the operator, and given upper voltage limit value can be the free voltage value near this cell load voltage value.In order to guarantee the voltage of fully balanced described a plurality of cells to be detected, described given upper voltage limit value is preferably the 90%-105% of this battery rated voltage.
Described rechargeable electrical energy can be from the 220v civil power.According to one embodiment of the present invention, this charging device also comprises charge power supply 7, is used for being connected with gating module 2, to under-voltage cell charging.This charge power supply 7 can be any power supply of the rated voltage rated voltage that is not less than cell to be detected, for example, can be storage battery.
In order to prevent generation to the overcharge conditions of cell, described charging device also comprises a plurality of voltage conversion devices 3, each voltage conversion device 3 is connected with rechargeable electrical energy with a gating module 2, when comprising charge power supply 7 in the charging device, this voltage conversion device 3 and this charge power supply 7 are electrically connected to obtain rechargeable electrical energy and to be used for voltage transitions with charge power supply 7 and become voltage in the cell range of nominal tension, and the electric energy after will changing outputs to the under-voltage cell that each is recharged.Described voltage conversion device 3 alternating voltage can be converted to the AC/DC transducer of the direct voltage in the required scope for any one or any one can be converted to direct voltage the DC/DC transducer of the direct voltage in the required scope, for example isolated voltage-dropping type AC/DC transducer, isolated voltage-dropping type DC/DC transducer.Owing to need under direct voltage, charge to cell, when charge power supply 7 is AC power, described voltage conversion device 3 is the AC/DC transducer, is used for the alternating voltage that charge power supply 7 provides is converted to direct voltage in the cell range of nominal tension; When charge power supply 7 was DC power supply, described voltage conversion device 3 was the DC/DC transducer, was used for the direct voltage that charge power supply 7 provides is converted to direct voltage in the cell range of nominal tension.
In addition, when not having voltage conversion device 3 in the charging device, described charge power supply 7 is a plurality of, and each charge power supply 7 is connected with a gating module 2 respectively.When comprising voltage conversion device 3 in the charging device, described charge power supply 7 can be one, and is connected with each voltage conversion device 3 respectively.
Under the prerequisite of the corresponding branch road that guarantees each gating module 2 that links to each other with under-voltage cell two ends of conducting, can be in program the conducting of the corresponding branch road of described gating module 2 be provided with in proper order.The order that to control the corresponding branch road conducting of gating module 2 under the preferable case is set at: in same gating module 2, the branch road at the under-voltage cell two ends that are connected with this gating module 2 by detected actual voltage value order from low to high conducting successively, but be parallel this operation of carrying out between each gating module 2.Saved charging total time thus.
The present invention also provides a kind of charging method, and wherein, this method may further comprise the steps: a plurality of batteries to be detected are divided into a plurality of battery pack; With the under-voltage cell in each battery pack optionally with the charge power supply conducting, with to this under-voltage cell charging.
Can realize a plurality of batteries to be detected are divided into a plurality of battery pack by gating module 2, by controller 4 each cell in each battery pack is carried out voltage detecting obtaining the actual voltage value of each cell, its middle controller 4 be by with gating module 2 in two branch roads being electrically connected with the two ends of this cell respectively realize described voltage detecting.Controller 4 compares detected actual voltage value and given lower voltage limit value afterwards, and this given lower voltage limit value is preferably the 50%-90% of this cell rated voltage.When the actual voltage value of this cell during less than given lower voltage limit value, two branch road conductings of the gating module 2 that controller 4 controls and these cell two ends are connected respectively, thus execution is to the charging operations of this battery.Wherein, each battery pack can be carried out above-mentioned detection and charging operations concurrently.And the above-mentioned detection of same battery pack inside and charging operations carry out successively to wherein each cell.
In addition, according to one embodiment of the present invention, described method is further comprising the steps of: stop the charging to this under-voltage cell when the actual voltage value of described under-voltage cell reaches described given upper voltage limit value.
In to the cell charging process, to compare with the given upper voltage limit value in being stored in controller 4 by the actual voltage value of controller 4 detected these cells, if this actual voltage value has reached given upper voltage limit value, then the corresponding branch road in the controller 4 control gating modules 2 disconnects, thereby stops the charging operations to this battery.Described given upper voltage limit value is preferably the 90%-105% of this cell rated voltage.
In addition, according to one embodiment of the present invention, this method comprises that level signal detects step, voltage comparison step and controlled step: described level signal detects the level signal that step is used for detecting each cell two ends of each battery pack, obtains the actual voltage value of described each cell according to level signal; The actual voltage value and the described given lower voltage limit value of each cell in each battery pack that described voltage comparison step is used for described level signal detection step is obtained compare to determine under-voltage cell; Described controlled step is used for controlling at least one battery pack simultaneously according to the comparative result of described voltage comparison step wherein under-voltage cell is charged successively.
Described level signal detects step and is carried out by the level signal detecting unit 8 in the controller 4, and described voltage comparison step is carried out by the voltage comparison unit in the controller 49, and described controlled step is carried out by the control unit in the controller 4 10.
Described method also comprises the voltage transitions step, be used for becoming the voltage in the cell range of nominal tension to the voltage transitions of the charge power supply of described under-voltage cell charging after, utilize electric energy after the conversion to described under-voltage cell charging again.
This voltage transitions step is carried out by voltage conversion device 3.Each voltage conversion device 3 is connected with rechargeable electrical energy with a gating module 2, when comprising charge power supply 7 in the charging device, this voltage conversion device 3 and this charge power supply 7 are electrically connected to obtain rechargeable electrical energy and to be used for voltage transitions with charge power supply 7 and become voltage in the cell range of nominal tension, and the electric energy after will changing outputs to the under-voltage cell that each is recharged.Described voltage conversion device 3 alternating voltage can be converted to the AC/DC transducer of the direct voltage in the required scope for any one or any one can be converted to direct voltage the DC/DC transducer of the direct voltage in the required scope, for example isolated voltage-dropping type AC/DC transducer, isolated voltage-dropping type DC/DC transducer.Owing to need under direct voltage, charge to cell, when charge power supply 7 is AC power, described voltage conversion device 3 is the AC/DC transducer, is used for the alternating voltage that charge power supply 7 provides is converted to direct voltage in the cell range of nominal tension; When charge power supply 7 was DC power supply, described voltage conversion device 3 was the DC/DC transducer, was used for the direct voltage that charge power supply 7 provides is converted to direct voltage in the cell range of nominal tension.
As shown in Figure 3, described charging device is at first by being divided into a plurality of batteries to be detected a plurality of battery pack that connect different gating modules 2; Afterwards, controller 4 is carried out the voltage detecting to each cell in each gating module 2 simultaneously, the first segment cell that is preferably in a plurality of batteries that are connected in series from each gating module 2 begins, and the level signal to each cell two ends detects until the final section cell successively.The level signal at each the joint cell two ends that obtains according to detection then obtains the actual voltage value of each cell, and the actual voltage value and the predefined given lower voltage limit value of each cell compared.Determine that according to comparative result the actual voltage value of this battery does not reach the under-voltage cell of given magnitude of voltage.Controller 4 is controlled at least one under-voltage cell charging to this simultaneously by the branch road at least one under-voltage cell two ends of conducting, this at least one under-voltage cell connects with different gating module 2 respectively, be that controller 4 is controlled each above-mentioned detection of gating module 2 executed in parallel and charging operations simultaneously, at this moment, voltage conversion device 3 will become the voltage in the cell range of nominal tension to the voltage transitions of the rechargeable electrical energy of described under-voltage cell charging, and described rechargeable electrical energy is incorporated in the under-voltage cell by gating module 2 in this conversion back, thereby under-voltage cell is charged, wherein in same gating module 2, described charging process is to carry out successively in the under-voltage cell that this gating module 2 is connected.When the actual voltage value after the under-voltage cell charging that collects reached given upper voltage limit value, controller 4 disconnected a pair of branch road that this cell connected, thereby stops the charging to this cell.Controller 4 is controlled cell execution the stopping charging operations that 2 pairs of each gating modules satisfy above-mentioned condition simultaneously.When no longer including actual voltage value and not reaching the unbalanced single battery of given lower voltage limit value, charging is finished, the actual voltage value of each cell in this moment described a plurality of batteries to be detected has all reached predefined given lower voltage limit value, has realized the equilibrium of voltage.
Claims (13)
1. charging device, it is characterized in that, this charging device comprises controller (4) and a plurality of gating module (2), and controller (4) is electrically connected with a plurality of gating modules (2) respectively, and each gating module (2) is electrically connected with each cell in the Battery pack; Controller (4) be used for controlling each gating module (2) optionally with the under-voltage cell conducting of coupled battery pack, each gating module (2) is used for being connected with charge power supply, to the cell charging of conducting.
2. charging device according to claim 1, wherein, controller (4) is used for detecting the voltage of each battery pack cell, according to the voltage of this cell, determines whether this cell is under-voltage battery.
3. charging device according to claim 1, wherein, this charging device also comprises charge power supply (7), is used for being connected to provide rechargeable electrical energy to gating module (2), to under-voltage cell charging with gating module (2).
4. charging device according to claim 3, wherein, described charge power supply (7) is a plurality of, each charge power supply (7) is connected with a gating module (2) respectively.
5. according to any described charging device among the claim 1-4, wherein, this charging device also comprises a plurality of voltage conversion devices (3), each voltage conversion device (3) is connected with charge power supply (7) with a gating module (2), is used for the voltage transitions of charge power supply (7) is become the interior voltage of the cell range of nominal tension.
6. charging device according to claim 1 and 2, wherein, described controller (4) comprises level signal detecting unit (8), voltage comparison unit (9) and the control unit (10) of series connection successively, and level signal detecting unit (8) and control unit (10) also are electrically connected with gating module (2):
Described level signal detecting unit (8) is used to detect the level signal at each continuous cell two ends of each gating module (2), obtain the actual voltage value of described each cell according to level signal, and described actual voltage value is sent to voltage comparison unit (9);
Described voltage comparison unit (9) is used for the actual voltage value and the given lower voltage limit value of each cell of each gating module (2) connection are compared, and determines whether this cell is under-voltage battery;
Described control unit (10) is used for controlling each gating module (2) and the under-voltage cell conducting that links to each other according to the comparative result of voltage comparison unit (9).
7, charging device according to claim 6, wherein, given lower voltage limit value is the 50%-90% of this battery load voltage value.
8, charging device according to claim 6, wherein, gating module (2) disconnection that control linked to each other with this under-voltage cell when control unit (10) also was used for actual voltage value at described under-voltage cell and reaches given upper voltage limit value.
9, charging device according to claim 8, wherein, given upper voltage limit value is the 90%-105% of this battery rated voltage.
10, a kind of charging method, wherein, this method may further comprise the steps:
A plurality of batteries to be detected are divided into a plurality of battery pack;
With the under-voltage cell in each battery pack optionally with the charge power supply conducting, with to this under-voltage cell charging.
11, charging method according to claim 10, wherein, described method is further comprising the steps of: stop the charging to this under-voltage cell when the actual voltage value of described under-voltage cell reaches described given upper voltage limit value.
12. method according to claim 10, wherein, this method comprises that level signal detects step, voltage comparison step and controlled step:
Described level signal detects the level signal that step is used for detecting each cell two ends of each battery pack, obtains the actual voltage value of described each cell according to level signal;
The actual voltage value and the described given lower voltage limit value of each cell in each battery pack that described voltage comparison step is used for described level signal detection step is obtained compare to determine under-voltage cell;
Described controlled step is used for controlling at least one battery pack simultaneously according to the comparative result of described voltage comparison step wherein under-voltage cell is charged successively.
13. according to any described method among the claim 10-12, wherein, this method also comprises the voltage transitions step, after being used for to become the voltage transitions of the charge power supply of described under-voltage cell charging the voltage in the cell range of nominal tension, utilize electric energy after the conversion again to described under-voltage cell charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103078436A CN101471576A (en) | 2007-12-28 | 2007-12-28 | Charging method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103078436A CN101471576A (en) | 2007-12-28 | 2007-12-28 | Charging method and apparatus |
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| CN101471576A true CN101471576A (en) | 2009-07-01 |
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| CNA2007103078436A Pending CN101471576A (en) | 2007-12-28 | 2007-12-28 | Charging method and apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129040A (en) * | 2009-12-18 | 2011-07-20 | 住友重机械工业株式会社 | Battery checking device |
| CN102299543A (en) * | 2010-06-23 | 2011-12-28 | 东芝泰格有限公司 | Electric power control apparatus, method for controlling charge operation of storage battery and printer |
| CN103715728A (en) * | 2012-10-06 | 2014-04-09 | 李雄业 | Equalization circuit and device for series-connected battery pack |
| CN103872741A (en) * | 2014-04-02 | 2014-06-18 | 芜湖三木电子科技有限公司 | Lithium battery management device based on clamping voltage balance |
| CN106740211A (en) * | 2016-12-28 | 2017-05-31 | 中聚（杭州）新能源科技有限公司 | The balancing energy system and method for electrokinetic cell |
| CN110808622A (en) * | 2019-11-11 | 2020-02-18 | 上海科技大学 | Battery equalization circuit and method based on LCC resonant converter |
-
2007
- 2007-12-28 CN CNA2007103078436A patent/CN101471576A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129040A (en) * | 2009-12-18 | 2011-07-20 | 住友重机械工业株式会社 | Battery checking device |
| CN102129040B (en) * | 2009-12-18 | 2014-08-13 | 住友重机械工业株式会社 | Battery checking device |
| CN102299543A (en) * | 2010-06-23 | 2011-12-28 | 东芝泰格有限公司 | Electric power control apparatus, method for controlling charge operation of storage battery and printer |
| CN103715728A (en) * | 2012-10-06 | 2014-04-09 | 李雄业 | Equalization circuit and device for series-connected battery pack |
| CN103872741A (en) * | 2014-04-02 | 2014-06-18 | 芜湖三木电子科技有限公司 | Lithium battery management device based on clamping voltage balance |
| CN106740211A (en) * | 2016-12-28 | 2017-05-31 | 中聚（杭州）新能源科技有限公司 | The balancing energy system and method for electrokinetic cell |
| CN110808622A (en) * | 2019-11-11 | 2020-02-18 | 上海科技大学 | Battery equalization circuit and method based on LCC resonant converter |
| CN110808622B (en) * | 2019-11-11 | 2023-09-26 | 上海科技大学 | Battery equalization circuit and method based on LCC resonant converter |
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Open date: 20090701 |