CN103311592B - Electrokinetic cell system and there is its vehicle - Google Patents
Electrokinetic cell system and there is its vehicle Download PDFInfo
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- CN103311592B CN103311592B CN201310264381.XA CN201310264381A CN103311592B CN 103311592 B CN103311592 B CN 103311592B CN 201310264381 A CN201310264381 A CN 201310264381A CN 103311592 B CN103311592 B CN 103311592B
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- 238000010586 diagram Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
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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 discloses a kind of electrokinetic cell system, it comprises N number of unit battery module parallel with one another and battery manager, and wherein, each unit battery module comprises: M cell, and each cell is connected mutually; M-1 the first gate-controlled switch is connected between adjacent two cells, and each first gate-controlled switch and second cell form M-1 battery unit to M cell one_to_one corresponding; M the second gate-controlled switch is connected in series, and first the second gate-controlled switch is in parallel with first cell, and second the second gate-controlled switch is in parallel with M-1 battery unit one_to_one corresponding to M gate-controlled switch; Battery manager is connected with each second gate-controlled switch respectively with each first gate-controlled switch, for controlling each first gate-controlled switch and each second gate-controlled switch.Electrokinetic cell system efficiency of the present invention is high, and to battery life fanout free region, robustness is good, and reliability is high.The invention also discloses a kind of vehicle.
Description
Technical field
The present invention relates to cell art, particularly a kind of electrokinetic cell system and a kind of vehicle with this electrokinetic cell system.
Background technology
Traditional B MS(Battery Management System, battery management system) in low layer cell p ack structure generally adopt first and rear string form, and in addition active/passive equalizing system to ensure the consistency that whole battery system runs, in the battery system that this mode combines, all the other non-fail batteries can be had a strong impact on when a certain cell breaks down, and in battery balanced process, the charge/discharge action grievous injury battery life of battery, also causes great energy waste in energy flow process.
Tradition is first and battery pack balancing that is rear string realizes easily, consistency is better, but the mutual balanced realization of the energy between the cell of parallel connection can cause battery charging and discharging increased frequency, battery life will decline, to produce a large amount of energy wastes while balanced energy flowing, battery failures short circuit will become shunt load in addition affects whole Battery pack group.And for the protection of its battery short circuit fault, in traditional scheme, use the method for series connection insurance scheme protection battery pack also extremely to fall behind.The first, the safe action time is slow; The second, not self recovery after safe action, must be repaired by special instrument by professional and technical personnel; 3rd, fuse consistency is very poor, accurately cannot control fusing time.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency.
For this reason; the object of the invention is to propose a kind of new electrokinetic cell system; multiple gate-controlled switch series-parallel system is adopted to control all cells; control this battery when overvoltage, the fault such as under-voltage appear in a certain cell be in path/short-circuit condition available protecting cell by controlling gate-controlled switch; and to avoid in conventional batteries management system due to the battery balanced infringement that brings battery and energy loss, farthest utilize the energy of whole battery system.
For achieving the above object, a kind of electrokinetic cell system that the present invention proposes, comprises N number of unit battery module parallel with one another and battery manager.Wherein, each unit battery module in described N number of unit battery module comprises: M cell, and each cell in a described M cell is connected mutually, and wherein, N and M is the integer being greater than 1; M-1 the first gate-controlled switch, described M-1 the first gate-controlled switch is connected in a described M cell between adjacent two cells, and in each first gate-controlled switch and a described M cell, second cell forms M-1 battery unit to M cell one_to_one corresponding; M the second gate-controlled switch, described M the second gate-controlled switch is connected in series, and first the second gate-controlled switch in described M the second gate-controlled switch is in parallel with first cell in a described M cell, second the second gate-controlled switch in individual second gate-controlled switch of described M is in parallel with described M-1 battery unit one_to_one corresponding to M gate-controlled switch; Wherein, described battery manager is connected with the control end of each second gate-controlled switch respectively with the control end of each first gate-controlled switch, and described battery manager is used for controlling described each first gate-controlled switch and each second gate-controlled switch.
According to the electrokinetic cell system of the embodiment of the present invention; multiple gate-controlled switch series-parallel system is adopted to control all cells; control this battery when overvoltage, the fault such as under-voltage appear in a certain cell be in path/short-circuit condition available protecting cell by controlling the first gate-controlled switch and the second gate-controlled switch; and to avoid in conventional batteries management system due to the battery balanced infringement that brings battery and energy loss, farthest utilize the energy of whole battery system.Therefore, electrokinetic cell system efficiency of the present invention is high, and to battery life fanout free region, robustness is good, and reliability is high.
In one embodiment of the invention, in described electrokinetic cell system charge balancing process, when the SOC of the cell that described battery manager detects in each unit battery module in M-1 battery unit is more than or equal to the first preset value, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.
In one embodiment of the invention, in described electrokinetic cell system equalization discharge process, when the SOC of the cell that described battery manager detects in each unit battery module in M-1 battery unit is less than the second preset value, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.
In one embodiment of the invention, when described battery manager detects the cell short circuit in each unit battery module in M-1 battery unit, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.
Preferably, in one embodiment of the invention, described electrokinetic cell system also comprises: hinge assembly fast, described quick hinge assembly is arranged between described each unit battery module.
By arranging quick hinge assembly between each unit battery module, convenient for maintaining is dismantled.
Wherein, described first gate-controlled switch and the second gate-controlled switch can be metal-oxide-semiconductor.
In one embodiment of the invention, the positive pole of first cell in described each unit battery module in M cell is connected with the first power bus, and the negative pole of M cell in described each unit battery module in M cell is connected with the second power bus.
In addition, embodiments of the invention also proposed a kind of vehicle, comprise above-mentioned electrokinetic cell system.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the circuit diagram of the electrokinetic cell system according to the embodiment of the present invention;
Fig. 2 is the structural representation of electrokinetic cell system according to an embodiment of the invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the invention provides the example of various specific technique and material, but those of ordinary skill in the art can recognize the applicability of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
With reference to description below and accompanying drawing, these and other aspects of embodiments of the invention will be known.Describe at these and in accompanying drawing, specifically disclose some particular implementation in embodiments of the invention, representing some modes of the principle implementing embodiments of the invention, but should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
The electrokinetic cell system proposed according to the embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the circuit diagram of the electrokinetic cell system according to the embodiment of the present invention.As shown in Figure 1, this electrokinetic cell system comprises N number of unit battery module 10 parallel with one another and battery manager (not shown), wherein, each unit battery module 10 in N number of unit battery module comprises M cell 101, M-1 the first gate-controlled switch 102 and M the second gate-controlled switch 103.Wherein, N and M is the integer being greater than 1.
As shown in Figure 1, each cell 101 in M cell is connected mutually, and, M-1 the first gate-controlled switch 102 is connected in M cell between adjacent two cells 101, and in each first gate-controlled switch and M cell, second cell forms M-1 battery unit 104 to M cell one_to_one corresponding.M the second gate-controlled switch 103 is connected in series, and first the second gate-controlled switch in M the second gate-controlled switch is in parallel with first cell in M cell, second the second gate-controlled switch in individual second gate-controlled switch of M is in parallel with M-1 battery unit one_to_one corresponding to M gate-controlled switch.
Battery manager is connected with the control end of each second gate-controlled switch 103 respectively with the control end of each first gate-controlled switch 102, and battery manager is used for controlling each first gate-controlled switch 102 and each second gate-controlled switch 103.
In an embodiment of the present invention, after above-mentioned electrokinetic cell system adopts first string and physical structure, string the quantity of cell can adjust arbitrarily according to system requirements.
Particularly, in one embodiment of the invention, as shown in Figure 1, the first gate-controlled switch 102 and the second gate-controlled switch 103 can be metal-oxide-semiconductor.Second cell in each unit battery module 10 to the positive pole of M cell all connects the source class S of series connection metal-oxide-semiconductor, first cell in each unit battery module 10 is to the drain D of the negative pole connection series connection metal-oxide-semiconductor of M-1 cell, the negative pole of each cell in each unit battery module 10 is connected with the source S of metal-oxide-semiconductor in parallel with it, the positive pole of first cell in each unit battery module 10 is connected with the drain D of metal-oxide-semiconductor in parallel with it, forms series parallel structure like this.In an example of the present invention, if adopt 101 strings 9 in this electrokinetic cell system and structure, need 101*9+100*9=1809 metal-oxide-semiconductor to guarantee to control each cell altogether.
Certainly, be understandable that, the first gate-controlled switch and the second gate-controlled switch also can substitute by better by other switch performances, that price is lower switch element.
In one embodiment of the invention, as shown in Figure 2, above-mentioned electrokinetic cell system also comprises quick hinge assembly 20, and quick hinge assembly 20 is arranged between each unit battery module 10.In electrokinetic cell system of the present invention, adopt each unit battery module 10 of hinge type anatomical connectivity of quick distachable physically, convenient for maintaining is dismantled.
In an embodiment of the present invention, as depicted in figs. 1 and 2, the positive pole of first cell in each unit battery module 10 in M cell is connected with the first power bus 30, and the negative pole of M cell in each unit battery module 10 in M cell is connected with the second power bus 40.Wherein, the first power bus 30 and the second power bus 40 can be connected in the voltage bus of using electricity system.
In one embodiment of the invention, in electrokinetic cell system charge balancing process, when the SOC of the cell 101 that described battery manager detects in each unit battery module 10 in M-1 battery unit is more than or equal to the first preset value, control the first gate-controlled switch corresponding in M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.That is, in the present embodiment, when electrokinetic cell system is in charged state, because lithium battery is in use because of the deviation of the problem such as technique, manufacture meeting generation time, thus the unbalanced of capacity is caused.And capacity unbalanced causes battery SOC inconsistent in discharge process, different from the tradition mode that SOC utilizes discharge resistance to discharge of charging, when in system of the present invention, after detecting that the electricity of the cell that SOC is less is saturated, adopt the metal-oxide-semiconductor disconnecting its series connection, this cell short circuit is directly gone out whole system by the mode of the metal-oxide-semiconductor of its parallel connection closed, state that all the other cells can continue charging until whole electricity reaches capacity.
And, in described electrokinetic cell system equalization discharge process, when the SOC of the cell that described battery manager detects in each unit battery module in M-1 battery unit is less than the second preset value, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.That is, when electrokinetic cell system of the present invention carries out equilibrium in discharge process and charging process similar, battery is due to characteristic variations guiding discharge losses such as its internal resistances, how many electric discharges there will be the inconsistent of overdischarge critical point etc., the discharge process of each cell in the whole battery pack of systems axiol-ogy, the metal-oxide-semiconductor of connecting with this cell is disconnected when there is certain cell overdischarge, the metal-oxide-semiconductor of its parallel connection closed, now electric current flows to S level from the D level of metal-oxide-semiconductor, because in the on-state characteristic of metal-oxide-semiconductor, DS conduction voltage drop is far smaller than body diode conduction voltage drop, therefore the parasitic body diode that short circuit is connected in metal-oxide-semiconductor by on-state metal-oxide-semiconductor in parallel, thus reach the object of shielding low-capacity batteries.
In the present embodiment, when battery manager detects the cell short circuit in each unit battery module 10 in M-1 battery unit 104, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.That is, in electrokinetic cell system of the present invention, when there is short circuit, overcurrent, overheated, the fault such as inefficacy, internal resistance sudden change of getting an electric shock in any cell, shielding mode is adopted to shield this fault cell, send alarm simultaneously, thus when a small amount of fault cell occurs on the impact of entire system performance by weakened.
It should be noted that, in an embodiment of the present invention, when there is overdischarge in certain cell in one of them unit battery module, system automatically controls the cell that in the cell in all the other unit battery modules, SOC is minimum and carries out unified shielding processing, thus ensure that the potential level of series battery is equal, and notify the step-down situation of host computer electrokinetic cell system.Report to the police when SOC variance rate is greater than certain value.Wherein, if certain series battery inefficacy cell is too much, system will take measures directly to shield this battery strings, thus the maximum SOC utilance of the system of guarantee.
In sum, in an embodiment of the present invention, integral battery door bag, without the need to carrying out cell equilibrium, from the angle of whole battery strings, only need can ensure the normal work of whole power brick with the cell that the poor/fault of some performance is fallen in short circuit by short switch.In addition, the very scabrous problem of conventional serial battery pack, does not add protective device by safety problems such as appearance blast, burnings, have also been obtained good solution in the present invention.Because have employed parallel/serial biswitch to ensure battery strings safety, only need disconnect tandem tap when short circuit appears in cell and close paralleling switch, whole Battery pack bag can avoid fail battery safe operation, in the extreme case even broken down when quite a few cell of whole Battery pack, the car load of this electrokinetic cell system is adopted still can remaining electric power to be relied on to move on (limp-home) under the prerequisite of sacrificing dynamic property.Therefore say, the present invention passes through structure innovation, adopt novel control mode, the way to manage etc. of optimization achieves that a kind of integrated level is high, portfolio effect good, efficiency is high, the novel battery management system scheme of reliable operation, complete function, these advantages are that the battery management system of traditional active/passive balanced way can not be compared or cannot realize.
According to the electrokinetic cell system of the embodiment of the present invention; multiple gate-controlled switch series-parallel system is adopted to control all cells; control this battery when overvoltage, the fault such as under-voltage appear in a certain cell be in path/short-circuit condition available protecting cell by controlling the first gate-controlled switch and the second gate-controlled switch; and to avoid in conventional batteries management system due to the battery balanced infringement that brings battery and energy loss, farthest utilize the energy of whole battery system.Therefore, electrokinetic cell system efficiency of the present invention is high, and to battery life fanout free region, robustness is good, and reliability is high.
In addition, embodiments of the invention also proposed a kind of vehicle, comprise above-mentioned electrokinetic cell system.Be understandable that, electrokinetic cell system of the present invention can also be used in wind-powered electricity generation, photovoltaic and variously need in the battery system of battery management, the excellent results that the idea in management of its novel structure and cell thereof is brought is that the battery management system of traditional active/passive balanced way can not be compared or cannot realize, and has necessarily perspective.Use the battery management system advantage that (end of lifetime of such as whole bag battery, the even multiple monomer fault of battery cell failure) has general traditional product incomparable under the bad working environments that some are special of program design.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (7)
1. an electrokinetic cell system, is characterized in that, comprises N number of unit battery module parallel with one another and battery manager, and wherein, each unit battery module in described N number of unit battery module comprises:
M cell, each cell in a described M cell is connected mutually, wherein, the positive pole of first cell in described each unit battery module in M cell is connected with the first power bus, the negative pole of M cell in described each unit battery module in M cell is connected with the second power bus, and N and M is the integer being greater than 1;
M-1 the first gate-controlled switch, described M-1 the first gate-controlled switch is connected in a described M cell between adjacent two cells, and in each first gate-controlled switch and a described M cell, second cell forms M-1 battery unit to M cell one_to_one corresponding;
M the second gate-controlled switch, described M the second gate-controlled switch is connected in series, and first the second gate-controlled switch in described M the second gate-controlled switch is in parallel with first cell in a described M cell, second the second gate-controlled switch in individual second gate-controlled switch of described M is in parallel with described M-1 battery unit one_to_one corresponding to M gate-controlled switch;
Wherein, described battery manager is connected with the control end of each second gate-controlled switch respectively with the control end of each first gate-controlled switch, and described battery manager is used for controlling described each first gate-controlled switch and each second gate-controlled switch.
2. electrokinetic cell system as claimed in claim 1, it is characterized in that, in described electrokinetic cell system charge balancing process, when the SOC of the cell that described battery manager detects in each unit battery module in M-1 battery unit is more than or equal to the first preset value, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.
3. electrokinetic cell system as claimed in claim 1, it is characterized in that, in described electrokinetic cell system equalization discharge process, when the SOC of the cell that described battery manager detects in each unit battery module in M-1 battery unit is less than the second preset value, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.
4. electrokinetic cell system as claimed in claim 1, it is characterized in that, when described battery manager detects the cell short circuit in each unit battery module in M-1 battery unit, control the first gate-controlled switch corresponding in described M-1 battery unit to disconnect, and control to close with the second gate-controlled switch of described M-1 battery units in parallel.
5. the electrokinetic cell system as described in any one of claim 1-4, its feature also comprises: hinge assembly fast, described quick hinge assembly is arranged between described each unit battery module.
6. electrokinetic cell system as claimed in claim 1, it is characterized in that, described first gate-controlled switch and the second gate-controlled switch are metal-oxide-semiconductor.
7. a vehicle, is characterized in that, comprises the electrokinetic cell system as described in any one of claim 1-6.
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| CN201310264381.XA CN103311592B (en) | 2013-06-27 | 2013-06-27 | Electrokinetic cell system and there is its vehicle |
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| CN201310264381.XA CN103311592B (en) | 2013-06-27 | 2013-06-27 | Electrokinetic cell system and there is its vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103647316B (en) * | 2013-12-03 | 2016-01-06 | 深圳市雅格朗电子有限公司 | A kind of serial lithium battery group power supply equalization management system |
| CN104734236B (en) * | 2013-12-19 | 2018-01-19 | 北汽福田汽车股份有限公司 | Battery set charge/discharge device and method |
| CN104228602B (en) * | 2014-09-24 | 2016-06-29 | 深圳市蓝玫瑰科技有限公司 | A kind of electric automobile adopting multiple feed multi-motor driving |
| CN105871037B (en) * | 2016-06-21 | 2019-07-02 | 苏州恒美电子科技股份有限公司 | Battery management system and method |
| KR20180069628A (en) * | 2016-12-15 | 2018-06-25 | 현대자동차주식회사 | Battery system and method for controlling the same |
| CN107276438A (en) * | 2017-07-31 | 2017-10-20 | 江苏国瑞科技有限公司 | High-voltage electrolysis capacitor cathode foil corrodes special large power supply |
| CN112737015B (en) * | 2020-12-22 | 2023-05-16 | 西安科技大学 | Lithium battery balance control system and control method based on SOC |
| CN113258146B (en) * | 2021-03-29 | 2022-12-30 | 华为数字能源技术有限公司 | Battery system, driving system and energy storage container |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101517777A (en) * | 2006-09-18 | 2009-08-26 | 株式会社Lg化学 | Battery module and middle or large-sized battery pack containing the same |
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| KR20120077482A (en) * | 2010-12-30 | 2012-07-10 | 최두진 | Balance charging apparatus for battery module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101517777A (en) * | 2006-09-18 | 2009-08-26 | 株式会社Lg化学 | Battery module and middle or large-sized battery pack containing the same |
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