CN103036278A - Battery management system adopting double-buses of energy and data - Google Patents
Battery management system adopting double-buses of energy and data Download PDFInfo
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- CN103036278A CN103036278A CN2012105048154A CN201210504815A CN103036278A CN 103036278 A CN103036278 A CN 103036278A CN 2012105048154 A CN2012105048154 A CN 2012105048154A CN 201210504815 A CN201210504815 A CN 201210504815A CN 103036278 A CN103036278 A CN 103036278A
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Abstract
The invention discloses a battery management system adopting double-buses of energy and data The battery management system adopting double-buses of energy and data comprises a master controller and a plurality of single-chip microcomputers used for energy balance controlling, wherein the single-chip microcomputers are connected with energy balance driver modules. The battery management system further comprises energy buses used as energy transfer storages in the process of energy balancing between single batteries. The master controller is provided with data buses, and each of the single-chip microcomputers is connected with the master controller through the data buses. The aim of the battery management system adopting double-buses of energy and data is that with the energy buses as energy transfers of all the single batteries in the process of energy balancing, a point to point balance between any two single batteries inside the battery box is realized, meanwhile, the master controller is connected with each of controlling devices through the data buses so that the data transmission of the battery management system is achieved, therefore, the whole battery box is capable of only using one master controller to accurately realize the point to point balance of single batteries, thereby improving the balancing speed and saving the cost of the balancing controller.
Description
[technical field]
The present invention relates to electric powered motor lithium battery management system field, particularly a kind of battery management system that adopts energy and the dual bus of data.
[background technology]
At present, the lithium battery that electric automobile uses all is to adopt multi-section serial to form battery pack to power, and battery case generally is comprised of many Battery packs group.The structure of existing battery management system is owing to adopting the difference of technological means, generally need to design according to actual conditions, design and installation is well changed cumbersome afterwards, do not have the dual bus-structured battery management system of energy and data, the technical scheme that the access standard that its neither one is unified is become reconciled, if cumbersome in the time of will adding on the original basis new battery pack and balancing energy module, need to again add all element circuits of balancing energy module and arrange it and the connecting circuit of controller, even to adjust annexation and control procedure between the balancing energy module, this is not easy to actual application, and in existing technical scheme, balancing energy generally can only be to carrying out equilibrium between the cell in the same battery pack, or the cell equilibrium generally is just can carry out balancing energy between the adjacent monomer battery in the battery pack, do not realize directly that any two points carries out the simple and easy technical scheme of balancing energy, so that balancing speed is lower, and along with the increase of cell number so that integrated circuit become increasingly complex.
Therefore, be necessary to solve as above problem.
[summary of the invention]
The present invention has overcome the deficiency of above-mentioned technology, a kind of battery management system that adopts energy and the dual bus of data is provided, it is the energy transfer of all cells during as balancing energy by energy bus, so that the point-to-point equilibrium of any two cells in the realization battery case, and master controller is connected with each control device by data/address bus, realize the transfer of data of battery management system, thereby whole battery case only need adopt a master controller just can realize accurately the equilibrium of cell point-to-point, improve balancing speed, and saved the cost of balance controller.
For achieving the above object, the present invention has adopted following technical proposal:
A kind of battery management system that adopts energy and the dual bus of data, include master controller 10 and be used for each cell of system is carried out the single-chip microcomputer 1 of balancing energy control with several, be connected with on the described single-chip microcomputer 5 for the voltage acquisition module 1 that cell is carried out voltage detecting with for the balancing energy driver module 2 that cell is carried out balancing energy, described battery management system also includes the energy bus 3 of storing as the energy transfer when carrying out balancing energy between cell, described each cell is connected with energy bus 3 by corresponding balancing energy driver module 2, described master controller 10 is provided with data/address bus 11, and described each single-chip microcomputer 1 all passes through data/address bus 11 and is connected with master controller 10.
Described voltage acquisition module 1 includes filter circuit 11, voltage collection circuit 12, the reference potential circuit 13 that is connected in parallel on the cell two ends, and described voltage collection circuit 2 voltage sample outputs, reference potential circuit 13 reference potential outputs are connected with single-chip microcomputer 1 respectively.
Described energy bus 3 adopts several electrochemical capacitors in parallel to form.
Described balancing energy driver module 2 includes the flyback transformer 20 that carries out energy exchange for cell and energy bus 3, being connected with for control both between described flyback transformer 20 armature windings and the cell is communicated with and forms the elementary gate-controlled switch circuit 21 that transmit to carry out energy in the loop, be connected with for control both between flyback transformer 20 secondary winding and the energy bus 3 and be communicated with and form the secondary gate-controlled switch circuit 22 that transmit to carry out energy in the loop, described elementary gate-controlled switch circuit 21, secondary gate-controlled switch circuit 22 are connected with single-chip microcomputer 1 respectively.
The invention has the beneficial effects as follows:
1, connects with power bus cell in each battery pack and battery pack by data/address bus, adopting the benefit of bus is compatibility and favorable expandability, can realize the equilibrium of cell energy between different battery pack, equilibrium in also can the realization group between cell, namely any two joint cells carry out point-to-point equilibrium in the battery case.
2, realize that by master controller accurate cell point-to-point is balanced, a plurality of energy transfer memories need to be set respectively in each battery pack, need between each energy transfer memory, not carry out energy exchange yet, its control is simple easily to be realized, reduced balanced repeatedly transfer step and control procedure, thereby improved the speed of energy content of battery equilibrium, and the loss when having reduced balancing energy.
3, whole battery case adopts a master controller to get final product, saved the cost that balance controller is set respectively in each battery pack, use unified energy bus as transfer, can between cell and energy bus, realize the modularized design of balancing energy driver module, its corresponding number is set in the realization as required.
4, by voltage acquisition module cell is carried out voltage monitoring, judge and just carry out whenever necessary balancing energy, removed and scarcely needed balanced situation, and when equilibrium, master controller is by the work of Single-chip Controlling balancing energy driver module, the energy of at first that energy is high battery is discharged on the energy bus, and then control by data/address bus, be discharged on the low cell of energy, the final energy exchange that realizes between cell and the cell, its control step is few and control method is simple easily realizes.
[description of drawings]
Fig. 1 is structure principle chart of the present invention.
Fig. 2 is voltage acquisition module structure principle chart of the present invention.
Fig. 3 is balancing energy driver module structure principle chart of the present invention.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiments of the present invention:
As shown in Figure 1, a kind of battery management system that adopts energy and the dual bus of data, it is characterized in that including master controller 10 and be used for each cell of system is carried out the single-chip microcomputer 1 of balancing energy control with several, be connected with on the described single-chip microcomputer 5 for the voltage acquisition module 1 that cell is carried out voltage detecting with for the balancing energy driver module 2 that cell is carried out balancing energy, described battery management system also includes the energy bus 3 of storing as the energy transfer when carrying out balancing energy between cell, described each cell is connected with energy bus 3 by corresponding balancing energy driver module 2, described master controller 10 is provided with data/address bus 11, and described each single-chip microcomputer 1 all passes through data/address bus 11 and is connected with master controller 10.
As mentioned above, are connected with energy bus by data/address bus 11 cell in each battery pack and the battery pack is connected, adopting the benefit of bus is compatibility and favorable expandability, can realize the equilibrium of cell energy between different battery pack, equilibrium in also can the realization group between cell, namely any two joint cells carry out point-to-point equilibrium in the battery case.
As shown in Figure 2, voltage acquisition module 1 of the present invention includes the filter circuit 11 that is connected in parallel on the cell two ends, voltage collection circuit 12, reference potential circuit 13, described voltage collection circuit 2 voltage sample outputs, reference potential circuit 13 reference potential outputs are connected with single-chip microcomputer 1 respectively, and single-chip microcomputer 1 comes voltage collection circuit 2 output signals are carried out the A/D analog-to-digital conversion and calculated output voltage values according to the reference potential of reference potential circuit 13, and calculate the cell both end voltage according to the corresponding relation of this output voltage values and cell both end voltage.
As mentioned above, carry out voltage monitoring by 1 pair of cell of voltage acquisition module, judge and just carry out whenever necessary balancing energy, removed and scarcely needed balanced situation.
Energy bus 3 of the present invention adopts several electrochemical capacitors in parallel to form.
As shown in Figure 3, balancing energy driver module 2 of the present invention includes the flyback transformer 20 that carries out energy exchange for cell and energy bus 3, being connected with for control both between described flyback transformer 20 armature windings and the cell is communicated with and forms the elementary gate-controlled switch circuit 21 that transmit to carry out energy in the loop, being connected with for control both between flyback transformer 20 secondary winding and the energy bus 3 is communicated with and forms the secondary gate-controlled switch circuit 22 that transmit to carry out energy in the loop, described elementary gate-controlled switch circuit 21, secondary gate-controlled switch circuit 22 is connected with single-chip microcomputer 1 respectively.
As mentioned above, in conjunction with the voltage monitoring of 1 pair of cell of voltage acquisition module, in detecting battery pack, there is the voltage of two cells to surpass certain difference range, just needs equilibrium.When equilibrium, master controller 10 is by the work of single-chip microcomputer 1 control balancing energy driver module 2, at first control elementary gate-controlled switch circuit 21 and the secondary gate-controlled switch circuit 22 of the high battery of energy, by flyback transformer 20 energy is discharged on the energy bus 3, then control by data/address bus, be discharged on the low cell of energy, the final energy exchange that realizes between cell and the cell, realize like this balancing energy of any two joint cells in the battery case, its control step is few and control method is simple easily realizes.
Repeat as required above-mentioned steps, make finally that each cell reaches an equilibrium in the battery case, be that the energy difference is all in the control range of a setting between the monomer whose battery, the performance of the performance of the whole battery case that makes is stable, and prolongs the useful life of each cell.
As mentioned above; the present invention protection be a kind of energy transfer of all cells during as balancing energy by energy bus 3; so that the point-to-point equilibrium of any two cells in the realization battery case; and master controller 10 is connected with the single-chip microcomputer 1 that respectively is used for each cell of system is carried out the energy monitoring by data/address bus 11; realize the transfer of data of battery management system; thereby whole battery case only need adopt a master controller 10 just can realize accurately the equilibrium of cell point-to-point; improve balancing speed, and saved the cost of balance controller.All technological means identical or close with technical solution of the present invention all should be shown the protection range that falls into this case.
Claims (4)
1. battery management system that adopts energy and the dual bus of data, it is characterized in that including master controller (10) and several and be used for single-chip microcomputer (1) that each cell of system is carried out the balancing energy control, be connected with on the described single-chip microcomputer (5) for the voltage acquisition module (1) that cell is carried out voltage detecting with for the balancing energy driver module (2) that cell is carried out balancing energy, described battery management system also includes the energy bus (3) of storing as the energy transfer when carrying out balancing energy between cell, described each cell is connected with energy bus (3) by corresponding balancing energy driver module (2), described master controller (10) is provided with data/address bus (11), and described each single-chip microcomputer (1) all passes through data/address bus (11) and is connected with master controller (10).
2. a kind of battery management system that adopts energy and the dual bus of data according to claim 1, it is characterized in that described voltage acquisition module (1) includes filter circuit (11), voltage collection circuit (12), the reference potential circuit (13) that is connected in parallel on the cell two ends, described voltage collection circuit (2) voltage sample output, reference potential circuit (13) reference potential output are connected with single-chip microcomputer (1) respectively.
3. a kind of battery management system that adopts energy and the dual bus of data according to claim 1 is characterized in that described energy bus (3) adopts several electrochemical capacitors in parallel to form.
4. a kind of battery management system that adopts energy and the dual bus of data according to claim 1, it is characterized in that described balancing energy driver module (2) includes the flyback transformer (20) that carries out energy exchange for cell and energy bus (3), being connected with for control both between described flyback transformer (20) armature winding and the cell is communicated with and forms the elementary gate-controlled switch circuit (21) that transmit to carry out energy in the loop, being connected with for control both between flyback transformer (20) secondary winding and the energy bus (3) is communicated with and forms the secondary gate-controlled switch circuit (22) that transmit to carry out energy in the loop, described elementary gate-controlled switch circuit (21), secondary gate-controlled switch circuit (22) is connected with single-chip microcomputer (1) respectively.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410918A (en) * | 2016-11-24 | 2017-02-15 | 重庆雅讯电源技术有限公司 | Battery management device and system |
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| CN201298740Y (en) * | 2008-10-31 | 2009-08-26 | 比亚迪股份有限公司 | Equalizing charge apparatus for series battery set |
| CN102064568A (en) * | 2010-10-11 | 2011-05-18 | 中国科学院青岛生物能源与过程研究所 | Active equalizing and protecting system of stackable series-connected lithium battery |
| CN102163854A (en) * | 2011-02-23 | 2011-08-24 | 中航锂电（洛阳）有限公司 | Charge-discharge equalizing circuit of multi-monomer tandem dynamic lithium battery |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467324A (en) * | 2006-06-15 | 2009-06-24 | Sk能源株式会社 | Charge equalization apparatus with parallel connection of secondary windings of multiple transformers |
| CN201298740Y (en) * | 2008-10-31 | 2009-08-26 | 比亚迪股份有限公司 | Equalizing charge apparatus for series battery set |
| CN102064568A (en) * | 2010-10-11 | 2011-05-18 | 中国科学院青岛生物能源与过程研究所 | Active equalizing and protecting system of stackable series-connected lithium battery |
| CN102163854A (en) * | 2011-02-23 | 2011-08-24 | 中航锂电（洛阳）有限公司 | Charge-discharge equalizing circuit of multi-monomer tandem dynamic lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106410918A (en) * | 2016-11-24 | 2017-02-15 | 重庆雅讯电源技术有限公司 | Battery management device and system |
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Application publication date: 20130410 |