CN106936168A - The battery system of active fault detect - Google Patents
The battery system of active fault detect Download PDFInfo
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- CN106936168A CN106936168A CN201511016011.XA CN201511016011A CN106936168A CN 106936168 A CN106936168 A CN 106936168A CN 201511016011 A CN201511016011 A CN 201511016011A CN 106936168 A CN106936168 A CN 106936168A
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Abstract
The present invention provides a kind of battery system of active fault detect, is exactly controller by controlling the charging and discharging of the single or multiple batteries in battery system comprising described active control；Again by sensor or information acquisition device, cell work information is obtained；Again by the diagnostic module with Supervisory Control for Discrete Event Systems and algorithm, the relation between analysis event, so as to whether the shape body for determining cell in battery pack is abnormal；So as to realize alarm, controller makes quarantine measures, is the safe and reliable work of battery energy storage system.
Description
【Technical field】
The present invention relates to electric energy storage system, more particularly, to a kind of battery management system of active fault diagnosis.
【Background technology】
Electric power greatly affected our life, and convenient economically storage electric power is the problem for perplexing scientist, and current people cannot also realize storing electric energy on a large scale, and the production and consumption of electric power is almost simultaneous.Because factor affected by environment is larger, little medium for utilizing natural resources type directly as power storage, such as, solar energy, wind energy, sea wave energy, tide energy, the energy of these types must also combine suitable electrical energy storage can just give full play to effect of peak regulation.The storage device of electric energy generally needs to convert electrical energy into other kinds of energy, in special time period, the energy of this type is reversed into electric energy again for needed for production and living.Battery storage is a kind of current relatively common power storage mode, can be applied in various fields, such as the field such as standby uninterruptible power, electric automobile of visual plant.
The storage energy of single battery is limited, and typically according to the demand of power, electric energy storage system can be made up of the cell of multiple or even thousands of.The cell quantity of electric energy storage system is once numerous, its safety and reliability ever more important.Battery system containing fault diagnosis functions then can to a certain extent ensure its safe and reliable operation.The failure that engineers and technicians and scholar in terms of some controls and artificial intelligence are devoted to studying battery adds survey and diagnoses, and method is concentrated mainly on quality and quantity both direction.Such as, detecting fault is realized using improved floating-point searching algorithm, fault detect is realized using the signal processing technology of particle filter.Also someone is devoted to bridging artificial intelligence strategy and control method.The fault diagnosis main purpose of battery is the deviation between the expected behavior and the dynamic of reality for recognizing battery system, and this deviation is isolated.But, large-scale battery pack contains large number of battery, even if entirely new battery, these battery behaviors are also all not quite similar, and the charge characteristic and working condition of battery are continually changing with life-span, environment and chemical parameters.
But, battery management and diagnosis are all to use passive technology, that is, when battery system has failure, specific failure could be found by battery system, and its result often brings the actual effect of system.Actual application is more biased towards in a battery management system for being capable of real-time active fault detect online, can be by the test of active and logic judgment come the state of preestimating battery, and then isolate or give a warning, system can be made to be maintained at normal working condition all the time.
Therefore, it is necessary to propose that a kind of new technical scheme solves the above problems.
【The content of the invention】
The purpose of this part is some aspects for the implementation for describing invention and briefly introduces some unit topology examples.May be done in the specification and denomination of invention of this part and application and simplify or omit and avoid making the purpose of this part, specification digest and denomination of invention to obscure, and these simplify and omission cannot be used for limiting the scope of the present invention.
It is an object of the invention to provide a kind of battery system of active fault detect, its detection that can realize battery failures before battery system normal work or in work by active control.The invention can give warning in advance, and not influence the normal of system to use, and failure system can be made to seamlessly transit to normal condition.
Purpose of the invention, the present invention provides a kind of battery system of active fault detect, is exactly controller by controlling the charging and discharging of the single or multiple batteries in battery system comprising described active control；Again by sensor or information acquisition device, single or multiple cell operating status are obtained；Again by the diagnostic module with discrete event system algorithm, the relation between the described control input of analysis and sensing two class events of output, so as to whether the shape body for determining cell in battery pack is abnormal；And by described status information feedback to controller, if abnormal then battery management center is made alarm, controller and makes quarantine measures.
Further, described controller can instruct the switching realized between the states such as the charging of each cell, standby and work according to described battery management center.Described controller includes necessary line switching switching device or device, comprising and be not limited to IGCT, MOS switch device, relay.
Further, described information acquisition device or sensor, itself working condition or peripheral working environment information of battery can be obtained, comprising and be not limited to cell voltage, battery charging voltage, battery charge, battery operated electric current, the internal resistance of cell, weight, volume, battery container temperature.Described information acquisition device or sensor include necessary sensing device or device, comprising and be not limited to voltage, electric current, temperature sensor.
Further, described sensing device and device are installed inside or outside cell, and single battery can share one or more sensing devices and device.
Further, described diagnostic function module can implement the control information and status information of the controller and described information acquisition device described in acquisition, and by analyzing active control information and status information, draw cell whether in work or various malfunctions.The algorithm of described diagnostic module can be realized by microcontroller, message handler DSP, programmed logical module FPGA or logic circuit.
Further, the algorithm of described diagnostic function module is set up on the discrete event system with event and logic analysis ability, hybrid system, the theory of Petri network and monitoring knowledge.
Further, total activation and control centre of the described battery management center for battery energy storage system, it is possible to achieve the real-time of external command, built in self testing, the acquisition of battery system information, the output of information and warning function.
Further, described controller, information acquisition device or sensor, diagnostic function module and battery management center are the abstract modules with the function, and different functional modules can be arbitrarily made with an entirety and physical module.
Compared with prior art, the present invention sets the diagnostic function module of controller, the sensor of status information and discrete event system scheduling theory with active control.The invention can be switched, be coordinated parameter information, the relation between analysis and Control event, battery status, State- output event of detection battery by the working condition of active control monomer or multiple batteries, draw battery whether in normal and malfunction, can early warning, isolate, take over seamlessly function.
【Brief description of the drawings】
Technical scheme in order to illustrate more clearly the embodiments of the present invention, the required accompanying drawing for using in being described to embodiment below does simply to be introduced, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of active fault diagnosis battery system in the present invention.
Fig. 2 is a kind of schematic diagram of topological structure 1 of battery system in the present invention.Wherein B1, B2, B3 and B4 are cell, and T1 and T2 is temperature sensor, and SW is controlling switch.The structure is in parallel with another two sections after two batteries are connected；4 batteries share a controlling switch；Battery B1 and B3 share a sensor T1；Battery B2 and B4 share a sensor T2.
Fig. 3 is a kind of schematic diagram of topological structure 2 of battery system in the present invention.Wherein B1, B2, B3 and B4 are cell, and T1, T2, T3 and T4 are temperature sensor, and SW is controlling switch.The structure is in parallel with another two sections after two batteries are connected；4 batteries share a controlling switch；Battery B1 uses sensor T1, battery B2 to use sensor T2, battery B3 to use sensor T3, battery B4 to use sensor T4.
Fig. 4 is a kind of schematic diagram of topological structure 3 of battery system in the present invention.Wherein B1, B2, B3 and B4 are cell, and T1 and T2 is temperature sensor, and SW1 and SW2 is controlling switch.The structure is in parallel with another two sections after two batteries are connected；Battery B1 and B2 share a controlling switch SW1；Battery B3 and B4 share a controlling switch SW2；Battery B1 and B3 share a sensor T1；Battery B2 and B4 share a sensor T2.
Fig. 5 is a kind of schematic diagram of topological structure 4 of battery system in the present invention.Wherein B1, B2, B3 and B4 are cell, and T1, T2, T3 and T4 are temperature sensor, and SW1 and SW2 is controlling switch.The structure is in parallel with another two sections after two batteries are connected；Battery B1 and B2 share a controlling switch SW1；Battery B3 and B4 share a controlling switch SW2；Battery B1 uses sensor T1, battery B2 to use sensor T2, battery B3 to use sensor T3, battery B4 to use sensor T4.
Fig. 6 is the automatic machine of cell state transformation in the present invention.Wherein Ai、Bi、Ci、Di、Ei、Fi、Hi、JiAnd NiIt is battery TiWorking condition, arrow between them event-driven different with expression is met and state transfer.
Fig. 7 is 4 parts for battery collaborative work state transformation automatic machine in topological structure 3 in the present invention.
【Specific embodiment】
It is of the invention to describe in detail mainly by program, step, logical block, process, automatic machine or other symbolistic descriptions come the running of direct or indirect simulation technical solution of the present invention.Thoroughly to understand the present invention, many specific details are set forth in following description.And when without these specific details, it is of the invention then still can may realize.Technical staff in art describes and states to introduce their work essence to the others skilled in the art in art using herein these.In other words, it is the purpose of the present invention of avoiding confusion, because well known methods and procedures has been readily appreciated that, therefore they are not described in detail.
" embodiment " referred to herein refers to can be comprising the special characteristic at least one implementation of the invention, structure and characteristic." in one embodiment " that different places occur in this manual not refers both to same embodiment, nor the single or selective embodiment mutually exclusive with other embodiment.In addition, representing the sequence of modules and any particular order of revocable reference in the method for one or more embodiments, flow chart, automatic machine or functional block diagram, also it is not construed as limiting the invention.
The present invention provides a kind of battery system of active fault detect, is exactly controller by controlling the charging and discharging of the single or multiple batteries in battery system comprising described active control；Again by sensor or information acquisition device, cell work information is obtained；Again by the diagnostic module with Supervisory Control for Discrete Event Systems and algorithm, the relation between analysis event, so as to whether the shape body for determining cell in battery pack is abnormal；So as to realize alarm, controller makes quarantine measures, is the safe and reliable work of battery energy storage system.
Fig. 1 represents system architecture diagram of the invention.Electric energy realizes that energy is rushed down in the charging accumulation of energy and electric discharge of battery pack by controller.The active fault detect of battery system passes through controller instruction input, realize the charging and discharging of battery pack, so as to bring the change of cell state in battery pack, these states meet at diagnostic function module analysis by information acquisition device or sensor, battery management center finally is fed back to, a complete closed loop configuration is realized.
Described system architecture can lead to described feedback and realize being precisely controlled and detecting for battery pack.Its exterior can be realized battery system operation, control, detection and be fed back by the information or instruction interaction with battery management center, by charging and discharging.
Described controller can refer to according to described battery management center, necessary line switching switching device or device, realize the switching between the states such as the charging of each cell, standby and work.
Described information acquisition device or sensor obtain itself working condition or peripheral working environment information of battery by sensing device or device, and parameter information is transmitted to described diagnostic function module.
Described diagnostic function module can implement the control information and status information of the controller and described information acquisition device described in acquisition, and active control information and status information are analyzed by the algorithm and logic in microcontroller, message handler DSP, programmed logical module FPGA or logic circuit, draw the working condition of cell.
Total activation and control centre of the described battery management center for battery energy storage system, it is possible to achieve the real-time of external command, built in self testing, the acquisition of battery system information, the output of information and warning function.
The topological structure of battery and sensor in battery management system can have various, and its citation form includes series connection and parallel way, it is also possible to by series connection and the mode of mixing in parallel, such as the 4 of Fig. 2 to Fig. 5 kinds typical modes.When number of batteries is more, its topographical form will be more.In order to illustrate the specific implementation principle of its actively monitoring, Fig. 4 will be analyzed as a sample.Other topological modes also can be judged and be diagnosed by control of the invention and analysis strategy.Topological structure is not construed as limiting the invention.
The present invention, in order to illustrate following examples, is briefly described using discrete event system, hybrid system, the theory of Petri network and monitoring knowledge to relevant knowledge and symbol definition.Methods and procedures known to technical staff in art has been readily appreciated that, therefore they are not described in detail.
In the present invention judgement basis and theoretical modeling of battery management system for automatic machine a G, G be a five-tuple on state Q, event ∑, state transition function 6, output state Y and output equation h；State Q can map T and be divided into two disjoint set by subregion；Event ∑ is by controllable event ∑cWith uncontrollable incident ∑ucComposition；GobsIt is an observer of G, its state z ∈ Z are a set of state q ∈ Q, and its state transition function orientates v as；Important state generally represents with subscript m, can also assert that it is identification-state, such as Zm。
The working condition of battery can be regarded as the state of G in the present invention, and charging, electric discharge, the change of state can be regarded as event, if the observer G of system Gobs, institute it is stateful reachable by identification-state and identification-state transfer function, represent that the system can be with active diagnosing when following relation is met：The condition is represented, when the correlation behavior and control event of cell and malfunction of concern meet condition, its work and malfunction can just be detected state.The guidance that the condition can be designed with so-called battery management system.Battery management system according to this condition can realize the detection of interested failure and working condition.
Fig. 4 is the topological battery management system embodiment set up according to diagnosable condition in the present invention, its topological structure such as " brief description of the drawings ".The normal operating conditions of the detectable battery of the embodiment, ageing state and internal resistance increase sharply state in 3.When battery status is normal, battery container temperature change is small during charge or discharge；When battery is in ageing state, battery container temperature change is very fast during charge or discharge；When battery is in internal resistance surge state, battery container temperature change is drastically during charge or discharge；The change outgoing event Y of temperature represents, Y={ 1,2,3 }, wherein 1 represents temperature minor variations, 2 expression temperature comparatively fast change, and 3 expression temperature drastically change.
Fig. 6 is the discrete event system automatic machine for battery i states in Fig. 4 and event.For battery i, i=1,2,3,4, the Event Description of system：αiRepresent aging, βiRepresent that internal resistance increases sharply, λiRepresent and charge, μiRepresent and stop charging, ηiRepresent electric discharge, σiRepresent and stop electric discharge.Obviously, λi、μ i、ηiAnd σiIt is controllable.The state description of system：AiIt is battery in charging and ageing state, BiFor in charging and normal condition, CiFor charge and internal resistance increase sharply in, DiIn idle and aging, NiIn idle and normal, EiFor electric discharge and it is aging in, HiFor electric discharge and it is normal in, FiIn being increased sharply for idle and internal resistance, JiFor in electric discharge and internal resistance surge.For battery i, i=1,2,3,4, its automatic machine can be expressed as Gi, such as N in figureiBy arrow ηiReach HiWhen representing that i-th battery is in idle and normal, now to this battery discharge, battery can changes into electric discharge and normal condition.
The system that Fig. 6 is represented, distinguishing mapping T can be divided into 3 kinds of different states, i.e. normal condition, ageing state, internal resistance surge state, Ti={ { Bi, Ni, Hi, { Ai, Di, Ei, { Ci, Fi, Ji}}.Because battery 1 and battery 2 are series connection, they must be simultaneously charged and discharge, so λ1=λ2, μ1=μ2, η1=η2, σ1=σ2；Similarly, λ3=λ4, μ3=μ4, η3=η4, σ3=σ4.Battery 1 causes the output of sensor 1 to be described as output mapping h11, similarly it is general output mapping be described as hki, k=1,2, i=1,2,3,4.
The all parts of system can influence each other, and need to unify all parts to consider during analysis, and in order to reflect problem comprehensively, each portion's part can be performed into married operation, such as Fig. 4, whole system can use G=G1||G2||G3||G4To represent.G contains 6561 states, and Fig. 7 represents a part of whole system automatic machine G.
The automatic machine that is represented for the system shown in Fig. 4, Fig. 6 and for G, T and h, can be by example behavior u=λ1μ1η3σ3Carry out the state of battery in active diagnosing battery management system；Its description and diagnosis process are as follows：The first step, start to charge battery 1,2 and observe the output of its temperature, output there are 9 kinds of possibility, comprising h (q)=(1,1) represent that all normal, h (q)=(2,1) of battery 1 and 2 represent that battery 1 is aging and battery 2 is all normal；Second step, stops charging battery 1 and 2, and now output is without being concerned about；3rd step, battery 3 and 4 charge and the output of observation period temperature, output also there are 9 kinds of possibility, comprising h (q)=(3,2) represent that the internal resistance surge of battery 3 and battery 4 are aging, h (q)=(2,3) expression battery 3 is aging and the internal resistance of battery 4 increases sharply；4th step：Stop charging battery 3,4.The control and observation of 4 steps more than, then can obtain the state of monomer in battery management system by output.
For Fig. 4 and Fig. 6, u=λ1μ1η3σ3It is a feasible control, system also has other controls to carry out active diagnosing system.This embodiment is merely illustrative the diagnostic logic of this explanation, but diagnostic logic method is not limited to the present embodiment.
In sum, the controllable operatings such as the charging and discharging that the present invention passes through active control battery management system, the work state information of cell can be obtained by the State- output and logic judgment that detect battery, early warning, isolation and repair can be carried out by status information.The relatively passive Diagnostic Superiority of the active diagnosing method is obvious.
Described above fully discloses specific embodiment of the invention.It is to be noted that, scope of the change that one skilled in the art is done to specific embodiment of the invention all without departing from claims of the present invention, accordingly, the scope of claim of the invention is also not limited only to foregoing specific embodiment.
Claims (8)
1. a kind of battery system of active fault detect, it is characterised in that：It is exactly controller by controlling the charging and discharging of the single or multiple batteries in battery system comprising active control；Again by sensor or information acquisition device, single or multiple cell operating status are obtained；Again by the diagnostic module with discrete event system algorithm, the relation between analysis and Control input and sensing two class events of output, so as to whether the shape body for determining cell in battery pack is abnormal；And by status information feedback to controller, if abnormal then battery management center is made alarm, controller and makes quarantine measures.
2. the battery system of active fault diagnosis according to claim 1, it is characterised in that：Described controller can instruct the switching realized between the states such as the charging of each cell, standby and work according to described battery management center.Described controller includes necessary line switching switching device or device, comprising and be not limited to IGCT, MOS switch device, relay.
3. the battery system of active fault diagnosis according to claim 1, it is characterised in that：Described information acquisition device or sensor, itself working condition or peripheral working environment information of battery can be obtained, comprising and be not limited to cell voltage, battery charging voltage, battery charge, battery operated electric current, the internal resistance of cell, weight, volume, battery container temperature.Described information acquisition device or sensor include necessary sensing device or device, comprising and be not limited to voltage, electric current, temperature sensor.
4. the battery system of active fault diagnosis according to claim 3, it is characterised in that：Described sensing device and device are installed inside or outside cell, and single battery can share one or more sensing devices and device.
5. the battery system of active fault diagnosis according to claim 1, it is characterised in that：Whether described diagnostic function module can implement the control information and status information of the controller and described information acquisition device described in acquisition, and by analyzing active control information and status information, draw cell in work or various malfunctions.The algorithm of described diagnostic module can be realized by microcontroller, message handler DSP, programmed logical module FPGA or logic circuit.
6. the battery system of active fault diagnosis according to claim 5, it is characterised in that：The algorithm of described diagnostic function module is set up on the discrete event system with event and logic analysis ability, hybrid system, the theory of Petri network and monitoring knowledge.
7. the battery system of active fault diagnosis according to claim 1, it is characterised in that：Total activation and control centre of the described battery management center for battery energy storage system, it is possible to achieve the real-time of external command, built in self testing, the acquisition of battery system information, the output of information and warning function.
8. the battery system of active fault diagnosis according to claim 1, it is characterised in that：Described controller, information acquisition device or sensor, diagnostic function module and battery management center are the abstract modules with the function, and different functional modules can be arbitrarily made with an entirety and physical module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572552A (en) * | 2018-04-24 | 2018-09-25 | 杭州电子科技大学 | A kind of hybrid passive/H based on fault alarm∞Mixed control method |
| CN113452094A (en) * | 2020-03-24 | 2021-09-28 | 博众精工科技股份有限公司 | Fire-fighting isolation method for charging bin and battery pack isolation structure for charging bin |
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2015
- 2015-12-31 CN CN201511016011.XA patent/CN106936168A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572552A (en) * | 2018-04-24 | 2018-09-25 | 杭州电子科技大学 | A kind of hybrid passive/H based on fault alarm∞Mixed control method |
| CN108572552B (en) * | 2018-04-24 | 2021-04-27 | 杭州电子科技大学 | Mixed passive/H based on fault alarm∞In a hybrid control method |
| CN113452094A (en) * | 2020-03-24 | 2021-09-28 | 博众精工科技股份有限公司 | Fire-fighting isolation method for charging bin and battery pack isolation structure for charging bin |
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