CN103311583A - Apparatus and method for equalizing lithium battery cells via MOS tubes - Google Patents
Apparatus and method for equalizing lithium battery cells via MOS tubes Download PDFInfo
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- CN103311583A CN103311583A CN2012100598730A CN201210059873A CN103311583A CN 103311583 A CN103311583 A CN 103311583A CN 2012100598730 A CN2012100598730 A CN 2012100598730A CN 201210059873 A CN201210059873 A CN 201210059873A CN 103311583 A CN103311583 A CN 103311583A
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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 provides an apparatus and a method for equalizing lithium battery cells via MOS tubes. The apparatus is applied in a lithium battery formed by more than two lithium battery cells connected in series. The apparatus provided by the utility model comprises a control unit, shunt units in parallel connection with the lithium battery cells and voltage detection units mounted between the input ends and the output ends of the lithium battery cells, wherein the input end of the control unit is connected with the output end of each voltage detection unit, and the output end of the control unit is connected with the input end of each shunt unit. Therefore, with the apparatus and the method for equalizing the lithium battery cells via the MOS tubes provided in the invention, the advantages of a simple structure, high reliability in use and good equalization of the lithium battery cells are obtained.
Description
Technical field
The invention belongs to circuit control technology field, be specifically related to a kind of apparatus and method that realize the equilibrium of lithium battery monomer by metal-oxide-semiconductor.
Background technology
Communication backup type lithium battery is usually by lithium batteries several, more than tens even tens monomer series-connected composition, thereby provides higher magnitude of voltage to the external world.For desirable lithium battery, the voltage of each lithium battery monomer, resistance and capacity should be consistent.But, because lithium battery is in process of production, to the process need process multiple working procedure that finally obtains finished product, both made the trace routine through strictness from coating process, be difficult to also guarantee that voltage, resistance and the capacity of each lithium battery monomer are consistent; And along with the increase of charging and discharging lithium battery number of times, the inconsistency between this each lithium battery monomer can increase gradually, and the inconsistency between each lithium battery monomer can directly influence the whole serviceability of lithium battery.For example: when the voltage between each lithium battery monomer is inconsistent, in the lithium cell charging process, the lithium battery monomer of overtension can trigger the over-charge of lithium battery electric protection ahead of time, and then to cause the lower lithium battery monomer of other voltages be the underfill state, thereby has influenced the whole volume of lithium battery; And in the lithium battery discharge process, the lithium battery monomer of brownout can trigger the lithium battery over ahead of time, and then causes the electric weight of the higher lithium battery monomer of other voltages still to have residue, thereby causes lithium battery capacity fully not to be utilized.And, inconsistency between each lithium battery monomer also can reduce the fail safe that lithium battery uses, for example: in the lithium cell charging process, if the voltage between each lithium battery monomer is inconsistent, then overcharge conditions can appear, thereby both increased the risk that lithium battery uses, simultaneously, also directly influenced the useful life of lithium battery.
Therefore, how the characteristics at inconsistency between each lithium battery monomer realize the equilibrium between each lithium battery monomer, and then prolongation lithium battery whole service life, whole use effect and safety in utilization have important practical significance.
In the prior art, adopt the mode of energy storage equilibrium or resistance equilibrium to realize equilibrium between each lithium battery monomer usually.
The energy storage equilibrium refers to: be energy-storage travelling wave tubes such as each lithium battery monomer shunt inductance or electric capacity, control the lithium battery monomer to the charge or discharge situation of energy-storage travelling wave tube by relay or switching device, and then realize the equilibrium between each lithium battery monomer.The major defect that the implementation method of this kind energy storage equilibrium has is: (one) therefore has the complicated defective of configuration because each lithium battery monomer all is parallel with energy-storage travelling wave tube; (2) being difficult to accurately, therefore control lithium battery monomer, has the defective of poor stability to the charge or discharge situation of energy-storage travelling wave tube.
The resistance equilibrium refers to: be each lithium battery monomer parallel resistance, and, each resistance switching device of all connecting, the break-make by controller control switch device realizes the purpose to the shunting of lithium battery monomer.The major defect that this kind resistance equalization methods exists is: with the difficult accurately selection of resistance of each lithium battery monomer parallel resistor, if the resistance of resistance is excessive, then euqalizing current is too small, and portfolio effect is poor; If the resistance of resistance is too small, then resistor power is bigger, causes the system capacity loss big.
Summary of the invention
At the defective that prior art exists, the invention provides a kind of apparatus and method by the equilibrium of metal-oxide-semiconductor realization lithium battery monomer, have advantage harmonious good between simple in structure, safe to use and each lithium battery monomer.
The technical solution adopted in the present invention is as follows:
The invention provides a kind of device of realizing the equilibrium of lithium battery monomer by metal-oxide-semiconductor, be applied to comprise by in two monomer series-connected lithium batteries of forming of above lithium battery: control unit, the dividing cell in parallel with each described lithium battery monomer and be installed in the input of each described lithium battery monomer and the voltage detection unit between the output; The input of described control unit is connected with the output of each described voltage detection unit, and the output of described control unit is connected with the input of each described dividing cell.
Preferably, described dividing cell is metal-oxide-semiconductor.
Preferably, described control unit comprises voltage comparator and the control signal drive circuit that connects successively.
The present invention also provides a kind of method by the equilibrium of metal-oxide-semiconductor realization lithium battery monomer, may further comprise the steps:
S1, in described lithium cell charging process, described control unit receives the current terminal voltage value of specifying the lithium battery monomer;
S2, the size of the more described current terminal voltage value of described control unit and standard voltage value, when described current terminal voltage value during greater than described standard voltage value, send the driving signal to the described dividing cell in parallel with described appointment lithium battery monomer, and then the described dividing cell of conducting.
Preferably, S1 is specially:
S11, given voltage detecting unit detect the current terminal voltage value of described appointment lithium battery monomer, and described current terminal voltage value is sent to described control unit;
S12, described control unit receive described current terminal voltage value.
Preferably, after the S2, also comprise:
S3, described control unit continues to receive the new terminal voltage value of described appointment lithium battery monomer;
S4, the more described new terminal voltage value of described control unit and the size of described standard voltage value, when described new terminal voltage value during smaller or equal to described standard voltage value, send cut-off signal to the described dividing cell in parallel with described appointment lithium battery monomer, and then disconnect described dividing cell.
Beneficial effect of the present invention is as follows: the apparatus and method that realize the equilibrium of lithium battery monomer by metal-oxide-semiconductor provided by the invention, in the lithium cell charging process, by the shunting of metal-oxide-semiconductor realization to the higher lithium battery monomer of voltage, thereby realize the purpose of each lithium battery monomer equilibrium, because the break-make control procedure of metal-oxide-semiconductor is simple, so, the complexity of system configuration simplified, reduce system cost, improved fail safe and the stability of system; And, have the little advantage of energy loss by the MOS shunting, thereby reduced system's temperature rise, improved the balanced efficient between the lithium battery monomer.
Description of drawings
Fig. 1 passes through the structure principle chart that metal-oxide-semiconductor is realized the device of lithium battery monomer equilibrium for what the embodiment of the invention provided;
Fig. 2 passes through the schematic flow sheet that metal-oxide-semiconductor is realized the method for lithium battery monomer equilibrium for what the embodiment of the invention provided.
Wherein, among Fig. 1, the 1st lithium battery monomer of 1---; The 2nd lithium battery monomer of 2---; The 3rd lithium battery monomer of 3-; N lithium battery monomer of N-; The 1st metal-oxide-semiconductor of Q1-; The 2nd metal-oxide-semiconductor of Q2-; The 3rd metal-oxide-semiconductor of Q3-; N metal-oxide-semiconductor of QN-.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
As shown in Figure 1, a kind of device of realizing the equilibrium of lithium battery monomer by metal-oxide-semiconductor that provides for the embodiment of the invention, be applied to comprise: the dividing cell in parallel with each described lithium battery monomer, the input that is installed in each described lithium battery monomer and the voltage detection unit between the output and control unit by in two monomer series-connected lithium batteries of forming of above lithium battery; The input of described control unit is connected with the output of each described voltage detection unit, and the output of described control unit is connected with the input of each described dividing cell.Wherein, dividing cell can be metal-oxide-semiconductor, and control unit comprises voltage comparator and the control signal drive circuit that connects successively.
The present invention also provides a kind of method by the equilibrium of metal-oxide-semiconductor realization lithium battery monomer, may further comprise the steps:
S1, in described lithium cell charging process, described control unit receives the current terminal voltage value of specifying the lithium battery monomer;
This step specifically comprises following two steps:
S11, given voltage detecting unit detect the current terminal voltage value of described appointment lithium battery monomer, and described current terminal voltage value is sent to described control unit;
S12, described control unit receive described current terminal voltage value.
S2, the size of the more described current terminal voltage value of described control unit and standard voltage value, when described current terminal voltage value during greater than described standard voltage value, send the driving signal to the described dividing cell in parallel with described appointment lithium battery monomer, and then the described dividing cell of conducting.
Concrete, control unit comprises: the voltage comparator of Lian Jieing and control signal drive circuit successively.The size of the more described current terminal voltage value of voltage comparator and standard voltage value, when described current terminal voltage value during greater than described standard voltage value, send the driving signal to described control signal drive circuit, by the drive dividing cell in parallel with specifying the lithium battery monomer.
S1 and S2 realized in the lithium cell charging process, when the terminal voltage of some lithium battery monomers is big, realizes purpose to this lithium battery monomer shunting by shunt circuit, thereby realized the charge balancing between each lithium battery monomer.After dividing cell is in conducting state, control unit need continue to detect the terminal voltage of this appointment lithium battery monomer, as long as when its terminal voltage during smaller or equal to standard voltage value, then showing does not need to continue to this appointment lithium battery monomer shunting, so, need this moment to disconnect the dividing cell in parallel with this lithium battery monomer, specifically comprise following S3 and S4.
S3, described control unit continues to receive the new terminal voltage value of described appointment lithium battery monomer;
S4, the more described new terminal voltage value of described control unit and the size of described standard voltage value, when described new terminal voltage value during smaller or equal to described standard voltage value, send cut-off signal to the described dividing cell in parallel with described appointment lithium battery monomer, and then disconnect described dividing cell.
In sum, the apparatus and method of passing through the equilibrium of metal-oxide-semiconductor realization lithium battery monomer that the application of the invention provides, in the lithium cell charging process, realize shunting to the higher lithium battery monomer of voltage by metal-oxide-semiconductor, thereby realize the purpose of each lithium battery monomer equilibrium, because the break-make control procedure of metal-oxide-semiconductor is simple, so, simplify the complexity of system configuration, reduced system cost, improved fail safe and the stability of system; And, have the little advantage of energy loss by the MOS shunting, thereby reduced system's temperature rise, improved the balanced efficient between the lithium battery monomer.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (6)
1. device of realizing the equilibrium of lithium battery monomer by metal-oxide-semiconductor, be applied to by in two monomer series-connected lithium batteries of forming of above lithium battery, it is characterized in that, comprising: control unit, the dividing cell in parallel with each described lithium battery monomer and be installed in the input of each described lithium battery monomer and the voltage detection unit between the output; The input of described control unit is connected with the output of each described voltage detection unit, and the output of described control unit is connected with the input of each described dividing cell.
2. the device by the equilibrium of metal-oxide-semiconductor realization lithium battery monomer according to claim 1 is characterized in that described dividing cell is metal-oxide-semiconductor.
3. the device by the equilibrium of metal-oxide-semiconductor realization lithium battery monomer according to claim 1 is characterized in that described control unit comprises voltage comparator and the control signal drive circuit that connects successively.
4. an application rights requires each described method of passing through the equilibrium of metal-oxide-semiconductor realization lithium battery monomer that realizes the device of lithium battery monomer equilibrium by metal-oxide-semiconductor of 1-3, it is characterized in that, may further comprise the steps:
S1, in described lithium cell charging process, described control unit receives the current terminal voltage value of specifying the lithium battery monomer;
S2, the size of the more described current terminal voltage value of described control unit and standard voltage value, when described current terminal voltage value during greater than described standard voltage value, send the driving signal to the described dividing cell in parallel with described appointment lithium battery monomer, and then the described dividing cell of conducting.
5. according to claim 4ly realize the method for lithium battery monomer equilibrium it is characterized in that S1 is specially by metal-oxide-semiconductor:
S11, given voltage detecting unit detect the current terminal voltage value of described appointment lithium battery monomer, and described current terminal voltage value is sent to described control unit;
S12, described control unit receive described current terminal voltage value.
6. the method by the equilibrium of metal-oxide-semiconductor realization lithium battery monomer according to claim 4 is characterized in that, after the S2, also comprises:
S3, described control unit continues to receive the new terminal voltage value of described appointment lithium battery monomer;
S4, the more described new terminal voltage value of described control unit and the size of described standard voltage value, when described new terminal voltage value during smaller or equal to described standard voltage value, send cut-off signal to the described dividing cell in parallel with described appointment lithium battery monomer, and then disconnect described dividing cell.
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| CN201210059873.0A CN103311583B (en) | 2012-03-06 | 2012-03-06 | A kind of apparatus and method being realized the equilibrium of lithium battery monomer by metal-oxide-semiconductor |
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| CN201210059873.0A CN103311583B (en) | 2012-03-06 | 2012-03-06 | A kind of apparatus and method being realized the equilibrium of lithium battery monomer by metal-oxide-semiconductor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683396A (en) * | 2013-11-29 | 2014-03-26 | 捷普科技（上海）有限公司 | Self-adaptive battery equalization charge device and method with turnover protection function |
| CN111245068A (en) * | 2020-03-21 | 2020-06-05 | 守恒新能源(重庆)有限公司 | Battery system with cooling equalization function and control method |
| CN111370787A (en) * | 2020-03-21 | 2020-07-03 | 守恒新能源(重庆)有限公司 | Battery system with balance repair function and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103683396A (en) * | 2013-11-29 | 2014-03-26 | 捷普科技（上海）有限公司 | Self-adaptive battery equalization charge device and method with turnover protection function |
| CN103683396B (en) * | 2013-11-29 | 2016-02-03 | 捷普科技（上海）有限公司 | A kind of adaptive battery balanced charging device and method with upset defencive function |
| CN111245068A (en) * | 2020-03-21 | 2020-06-05 | 守恒新能源(重庆)有限公司 | Battery system with cooling equalization function and control method |
| CN111370787A (en) * | 2020-03-21 | 2020-07-03 | 守恒新能源(重庆)有限公司 | Battery system with balance repair function and control method |
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| CN103311583B (en) | 2015-09-30 |
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Address after: 100095 floor No. 1, courtyard No. 33, purple Bird Road, Haidian District, Beijing City, -1 to 5 floor 101 Patentee after: Beijing linkage Tianyi Polytron Technologies Inc Address before: 100044 Beijing city Haidian District Road No. 5 Building 2 401 P.Tricuspidata Patentee before: Beijing Liandong Tianyi Technology Co., Ltd. |
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