CN105606950A - Diagnosis method and diagnosis system for voltage sampling line fault of battery management system - Google Patents
Diagnosis method and diagnosis system for voltage sampling line fault of battery management system Download PDFInfo
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- CN105606950A CN105606950A CN201610013734.2A CN201610013734A CN105606950A CN 105606950 A CN105606950 A CN 105606950A CN 201610013734 A CN201610013734 A CN 201610013734A CN 105606950 A CN105606950 A CN 105606950A
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- voltage
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- sample line
- battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Abstract
The invention discloses a diagnosis method and diagnosis system for a voltage sampling line fault of a battery management system. The diagnosis method comprises: (1), all detection switches are maintained to be in an off state, a voltage at each voltage detection point is read and a corresponding voltage value of each single voltage is recorded; and (2), whether a voltage sampling line of each single battery is disconnected is detected and corresponding fault information is obtained. In addition, the diagnosis system includes a voltage detection module and a voltage sampling line detection module. According to the technical scheme, a collection line fault can be diagnosed; after disconnection of the sampling line is determined, the voltage of the single battery can be recovered, so that a phenomenon that the system enters an abnormal processing module immediately after the voltage drops suddenly during the operation process can be avoided. Therefore, the system stability can be improved and the user experience is improved.
Description
Technical field
The present invention relates to the technical field of electric automobile, more particularly, relate to a kind of battery management systemVoltage sample line method for diagnosing faults and diagnostic system.
Background technology
Along with industrialized development, electric automobile is widely applied in daily life field, its peaceFull problem is also one of focus of paying close attention to of people, in order to ensure the safety of battery, for each cellThe temperature that voltage, battery module and high pressure connection etc. are located, operating current and the insulating properties of battery system, all needTo be monitored in real time by battery management system (BMS). But, product in use, due to peaceDress reliability, vibration, wearing and tearing, aging etc., can cause wire harness fault, is not only difficult for being found in time electricityThe relevant portion of cell system also may be in out of control, and misoperation that also can inducing B MS, affects product and use,Even cause potential safety hazard.
When current battery management system is carried out voltage sample, the modes that use sample line to connect are carried out battery moreVoltage acquisition, in the situation that a certain batteries sample line disconnects, system will can't detect the electricity of this batteriesPress, or the value detecting is improper value. In this situation, if do not have reliable means can diagnose out sample lineConnection, will likely think that cell voltage occurs by mistake abnormal; Or carry out after burn out detection not extremelySampled voltage is processed.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of battery management system electricity is providedPress sample line method for diagnosing faults and diagnostic system, thereby effectively judge whether to exist fault.
To achieve these goals, technical scheme provided by the invention is as follows:
A kind of battery management system voltage sample line method for diagnosing faults provided by the invention, every joint in battery packThe positive pole of cell is connected to corresponding cathode voltage test point by a voltage sample line respectively, and n saves singleThe cathode voltage test point of body battery is simultaneously as the cathode voltage test point of n+1 joint cell, minimumThe negative pole of joint cell is connected to reference voltage test point by a reference voltage sample line, and every joint monomer electricityThe diagnosed branch of connecting between the cathode output end in pond and its cathode voltage test point, this diagnosed branch comprises successivelyThe detection resistance and the sense switch that are connected in series, the method comprises the steps:
(1) keep all sense switches to disconnect, read each voltage detecting point voltage now record correspondingThe magnitude of voltage of every monomer voltage;
(2) whether the voltage sample line that detects successively every joint cell disconnects, and obtains corresponding fault message,Judge that the process whether the voltage sample line of n joint cell disconnect is as follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
As preferred technical scheme, also comprise step (3): if the voltage sample line of n joint cellDisconnect, the voltage of n joint and n+1 joint cell is recovered.
As preferred technical scheme, in step (3), recover to adopt following voltage to recover to voltageMechanism:
(3-1) the detection voltage of the detection voltage to n joint cell and n+1 joint cell asks flatAverage, this mean value saves respectively the voltage recovery value of cell and n+1 joint cell as n.
As preferred technical scheme, after execution step (3), also comprise the cell that judgement is resumedVoltage recovery value whether lower than default fault alarm threshold value, if carry out extremely lower than fault alarm threshold valueReport to the police, and enter the step (4) of abnormality processing pattern.
As preferred technical scheme, drawing after corresponding fault message, also comprise by host computer orDisplay terminal shows the step (5) of fault message.
As preferred technical scheme, also comprise by VCU and send fault message to nothing with communicationThe step (6) that line handheld terminal shows.
As preferred technical scheme, in step (5), display terminal passes through received fault messageSpecific protocol is resolved, and finally on display interface, shows the information after resolving.
The present invention also provides a kind of battery management system voltage sample line fault diagnosis system, every in battery packThe positive pole of joint cell is connected to corresponding cathode voltage test point by a voltage sample line respectively, n jointThe cathode voltage test point of cell saves the cathode voltage test point of cell simultaneously as n+1,The negative pole of low joint cell is connected to reference voltage test point by a reference voltage sample line, and every joint monomerThe diagnosed branch of connecting between the cathode output end of battery and its cathode voltage test point, this diagnosed branch comprises complies withInferior detection resistance and the sense switch being connected in series, this diagnostic system also comprises:
Voltage detection module, for keeping all sense switches to disconnect, reads now each voltage detecting point electricityPress and record the magnitude of voltage of corresponding every monomer voltage;
Whether voltage sample line detection module, disconnect for the voltage sample line that detects successively every joint cell,Obtain corresponding fault message; Judge that the process whether the voltage sample line of n joint cell disconnect is as follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
As preferred technical scheme, this system also comprises:
Voltage recovers module, in the time that the voltage sample line of n joint cell disconnects, to n joint andThe voltage of n+1 joint cell recovers;
Abnormal alarm module, for the voltage recovery value that judges the cell being resumed whether lower than defaultFault alarm threshold value, if carry out abnormal alarm lower than fault alarm threshold value, and enters abnormality processing pattern;
Display module, for drawing after corresponding fault message, also comprises by host computer or shows eventuallyEnd shows fault message;
Fault message sending module, for sending fault message to wireless hand by VCU with communicationHolding terminal shows.
As preferred technical scheme, recover in module at voltage, to n joint and n+1 joint cellVoltage recover adopt following voltage Restoration Mechanism:
The detection voltage of the detection voltage to n joint cell and n+1 joint cell is averaged,This mean value saves respectively the voltage recovery value of cell and n+1 joint cell as n.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention can gather the diagnosis of line fault, after confirming that sample line disconnects, can recover phaseAnswer the voltage of cell, make to be unlikely to because falling suddenly of voltage enters at once in system runningAbnormality processing pattern, is conducive to user and improves the stability of a system, has good user and experiences.
2, the present invention effectively judges it and this joint cell is carried out to electricity in the time that battery sampling line disconnectsPress and recover and on time display, occur sampling fault in system, and in the situation that user must use,The better user that provides in principle based on protection battery experiences.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to implementingIn example or description of the Prior Art, the accompanying drawing of required use is briefly described, and apparently, the following describesIn accompanying drawing be some embodiments of the present invention, for those of ordinary skill in the art, do not paying woundUnder the prerequisite of the property made work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of sample detecting circuit of the present invention;
Fig. 2 is the stream of the battery management system voltage sample line method for diagnosing faults that provides of the embodiment of the present invention oneCheng Tu;
Fig. 3 is the stream of the battery management system voltage sample line method for diagnosing faults that provides of the embodiment of the present invention twoCheng Tu;
Fig. 4 is the knot of the battery management system voltage sample line fault diagnosis system that provides of the embodiment of the present invention threeStructure block diagram;
Fig. 5 is the knot of the battery management system voltage sample line fault diagnosis system that provides of the embodiment of the present invention fourStructure block diagram.
Detailed description of the invention
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the present inventionAccompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, obviously,Described embodiment is the present invention's part embodiment, instead of whole embodiment. In the present inventionEmbodiment, those of ordinary skill in the art do not make under creative work prerequisite, obtain all itsHis embodiment, belongs to the scope of protection of the invention.
Embodiment mono-
Embodiments of the invention one provide a kind of battery management system voltage sample line method for diagnosing faults, Fig. 2Be the method flow diagram of the embodiment of the present invention one, please refer to Fig. 2, then in conjunction with the knot of the sample detecting circuit of Fig. 1Structure schematic diagram, in the present embodiment, in battery pack, the positive pole of every joint cell is respectively by a voltage sample lineBe connected to corresponding cathode voltage test point, the cathode voltage test point of n joint cell is simultaneously as n+1The cathode voltage test point of joint cell, the negative pole of lowest section cell is by a reference voltage sample lineBe connected to reference voltage test point, and between the cathode output end of every joint cell and its cathode voltage test pointSeries connection diagnosed branch, this diagnosed branch comprises the detection resistance and the sense switch that are connected in series successively, the present inventionThe method of embodiment comprises the following steps:
Step S101, keep all sense switches to disconnect, read now each voltage detecting point voltage recordThe magnitude of voltage of corresponding every monomer voltage;
Whether step S102, the voltage sample line that detects successively every joint cell disconnect, obtain corresponding thereforeBarrier information, judges that the process whether the voltage sample line of n joint cell disconnect is as follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
Can gather the diagnosis of line fault by technique scheme, after confirming that sample line disconnects, energyEnough recover the voltage of corresponding cell, make to be unlikely in system running because the falling suddenly of voltageOn failing, enter abnormality processing pattern, be conducive to user and improve the stability of a system, there is good user and experience.
Embodiment bis-
Embodiments of the invention two provide a kind of battery management system voltage sample line method for diagnosing faults, areThe improvement of carrying out on the basis of embodiment mono-. Fig. 3 is the method flow diagram of the embodiment of the present invention two, pleaseWith reference to figure 3, the method for the embodiment of the present invention comprises the following steps:
Step S201, keep all sense switches to disconnect, read now each voltage detecting point voltage recordThe magnitude of voltage of corresponding every monomer voltage;
Whether step S202, the voltage sample line that detects successively every joint cell disconnect, obtain corresponding thereforeBarrier information, judges that the process whether the voltage sample line of n joint cell disconnect is as follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
If the voltage sample line of step S203 n joint cell disconnects, to n joint and n+1 jointThe voltage of cell recovers;
Voltage to n joint and n+1 joint cell recovers to adopt following voltage Restoration Mechanism:
Step S2301, detection voltage to n joint cell and the detection voltage of n+1 joint cellAverage, this mean value recovers as the voltage of n joint cell and n+1 joint cell respectivelyValue.
Whether the voltage recovery value of the cell that step S204, judgement are resumed is lower than default fault alarmThreshold value, if carry out abnormal alarm lower than fault alarm threshold value, and enters abnormality processing pattern;
Step S205, drawing after corresponding fault message, showing fault by host computer or display terminalInformation;
In step S205, display terminal is resolved received fault message by specific protocol,On display interface, show eventually the information after resolving.
Step S206, by VCU with communication send fault message show to wireless handheld terminalShow.
Can gather the diagnosis of line fault by technique scheme, after confirming that sample line disconnects, energyEnough recover the voltage of cell, make to be unlikely in system running because the falling suddenly at once of voltageEnter abnormality processing pattern, be conducive to user and improve the stability of a system, there is good user and experience.
By the technical scheme of the present embodiment, the present invention effectively judges it in the time that battery sampling line disconnectsAnd this joint cell is carried out to voltage recovery and on time display, there is sampling fault in system, and useIn the situation that family must be used again, the better user that provides in principle based on protection battery experiences.
Embodiment tri-
Embodiments of the invention three provide a kind of battery management system voltage sample line fault diagnosis system, Fig. 4Be the structured flowchart of the embodiment of the present invention three, please refer to Fig. 4, then in conjunction with the structure of the sample detecting circuit of Fig. 1Schematic diagram, in the battery pack of the embodiment of the present invention, the positive pole of every joint cell is respectively by a voltage sample lineBe connected to corresponding cathode voltage test point, the cathode voltage test point of n joint cell is simultaneously as n+1The cathode voltage test point of joint cell, the negative pole of lowest section cell is by a reference voltage sample lineBe connected to reference voltage test point, and between the cathode output end of every joint cell and its cathode voltage test pointSeries connection diagnosed branch, this diagnosed branch comprises the detection resistance and the sense switch that are connected in series successively, this diagnosisSystem also comprises: voltage detection module 1 and voltage sample line detection module 2, and below by each functional modulePrinciple is described in detail.
Voltage detection module 1, for keeping all sense switches to disconnect, reads now each voltage detecting point electricityPress and record the magnitude of voltage of corresponding every monomer voltage;
Whether voltage sample line detection module 2, break for the voltage sample line that detects successively every joint cellOpen, obtain corresponding fault message; Judge the process whether the voltage sample line of n joint cell disconnectsAs follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
Can gather the diagnosis of line fault by technique scheme, after confirming that sample line disconnects, energyEnough recover the voltage of cell, make to be unlikely in system running because the falling suddenly at once of voltageEnter abnormality processing pattern, be conducive to user and improve the stability of a system, there is good user and experience.
Embodiment tetra-
Embodiments of the invention four provide a kind of battery management system voltage sample line fault diagnosis system, pleaseWith reference to figure 5, the difference of the barrier diagnostic system of the embodiment of the present invention and the barrier diagnostic system of above-described embodiment three existsIn, this system also comprises that voltage recovers module 3, abnormal alarm module 4, display module 5 and fault message and sends outSend module 6;
Voltage recovers module 3, in the time that the voltage sample line of n joint cell disconnects, to n joint andThe voltage of n+1 joint cell recovers;
Abnormal alarm module 4, for the voltage recovery value that judges the cell being resumed whether lower than defaultFault alarm threshold value, if carry out abnormal alarm lower than fault alarm threshold value, and enters abnormality processing pattern;
Display module 5, for drawing after corresponding fault message, also comprises by host computer or shows eventuallyEnd shows fault message;
Fault message sending module 6, for sending fault message to wireless hand by VCU with communicationHolding terminal shows.
Recover in module 3 at voltage, the voltage of n joint and n+1 joint cell is recovered to adoptFollowing voltage Restoration Mechanism:
The detection voltage of the detection voltage to n joint cell and n+1 joint cell is averaged,This mean value saves respectively the voltage recovery value of cell and n+1 joint cell as n.
It should be noted that a kind of battery management system voltage sample line fault that above-described embodiment provides at thisDiagnostic system, is only illustrated with the division of above-mentioned each functional module, in practical application, and can basisNeed and above-mentioned functions distribution is completed by different functional modules, being divided into not by the internal structure of systemSame functional module, to complete all or part of function described above.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method isCan carry out the hardware that instruction is relevant by program and complete, described program can be stored in computer-readableGet in storage medium, described storage medium, as ROM/RAM, disk, CD etc.
Above-described embodiment is preferably embodiment of the present invention, but embodiments of the present invention are not subject to above-mentioned realityExecute routine restriction, other any do not deviate from the change done under Spirit Essence of the present invention and principle, modification,Substitute, combine, simplify, all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a battery management system voltage sample line method for diagnosing faults, is characterized in that, every in battery packThe positive pole of joint cell is connected to corresponding cathode voltage test point by a voltage sample line respectively, n jointThe cathode voltage test point of cell saves the cathode voltage test point of cell simultaneously as n+1,The negative pole of low joint cell is connected to reference voltage test point by a reference voltage sample line, and every joint monomerThe diagnosed branch of connecting between the cathode output end of battery and its cathode voltage test point, this diagnosed branch comprises complies withInferior detection resistance and the sense switch being connected in series, the method comprises the steps:
(1) keep all sense switches to disconnect, read each voltage detecting point voltage now record correspondingThe magnitude of voltage of every monomer voltage;
(2) whether the voltage sample line that detects successively every joint cell disconnects, and obtains corresponding fault message,Judge that the process whether the voltage sample line of n joint cell disconnect is as follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
2. battery management system voltage sample line method for diagnosing faults according to claim 1, its featureBe, also comprise step (3): if the voltage sample line of n joint cell disconnects, to n joint andThe voltage of n+1 joint cell recovers.
3. battery management system voltage sample line method for diagnosing faults according to claim 2, its featureBe, in step (3), voltage recovered to adopt following voltage Restoration Mechanism:
(3-1) the detection voltage of the detection voltage to n joint cell and n+1 joint cell asks flatAverage, this mean value saves respectively the voltage recovery value of cell and n+1 joint cell as n.
4. battery management system voltage sample line method for diagnosing faults according to claim 2, its featureBe, after execution step (3), also comprise and judge that whether the voltage recovery value of the cell being resumed is lowIn default fault alarm threshold value, if carry out abnormal alarm lower than fault alarm threshold value, and enter exceptionThe step (4) of reason pattern.
5. battery management system voltage sample line method for diagnosing faults according to claim 1, its featureBe, drawing after corresponding fault message, also comprise by host computer or display terminal and show fault letterThe step (5) of breath.
6. battery management system voltage sample line method for diagnosing faults according to claim 1, its featureBe, also comprise that sending fault message by VCU with communication shows to wireless handheld terminalStep (6).
7. battery management system voltage sample line method for diagnosing faults according to claim 5, its featureBe, in step (5), display terminal is resolved received fault message by specific protocol,Finally on display interface, show the information after resolving.
8. a battery management system voltage sample line fault diagnosis system, is characterized in that, every in battery packThe positive pole of joint cell is connected to corresponding cathode voltage test point by a voltage sample line respectively, n jointThe cathode voltage test point of cell saves the cathode voltage test point of cell simultaneously as n+1,The negative pole of low joint cell is connected to reference voltage test point by a reference voltage sample line, and every joint monomerThe diagnosed branch of connecting between the cathode output end of battery and its cathode voltage test point, this diagnosed branch comprises complies withInferior detection resistance and the sense switch being connected in series, this diagnostic system also comprises:
Voltage detection module, for keeping all sense switches to disconnect, reads now each voltage detecting point electricityPress and record the magnitude of voltage of corresponding every monomer voltage;
Whether voltage sample line detection module, disconnect for the voltage sample line that detects successively every joint cell,Obtain corresponding fault message; Judge that the process whether the voltage sample line of n joint cell disconnect is as follows:
Whether sense switch corresponding to closed n+1 joint cell, detect n joint monomer battery voltage and go upRise and/or whether n+1 joint monomer battery voltage declines, if n joint monomer battery voltage rises and/or theN+1 joint monomer battery voltage declines, and thinks that n joint monomer voltage sample line disconnects.
9. battery management system voltage sample line fault diagnosis system according to claim 8, its featureBe, this system also comprises:
Voltage recovers module, in the time that the voltage sample line of n joint cell disconnects, to n joint andThe voltage of n+1 joint cell recovers;
Abnormal alarm module, for the voltage recovery value that judges the cell being resumed whether lower than defaultFault alarm threshold value, if carry out abnormal alarm lower than fault alarm threshold value, and enters abnormality processing pattern;
Display module, for drawing after corresponding fault message, also comprises by host computer or shows eventuallyEnd shows fault message;
Fault message sending module, for sending fault message to wireless hand by VCU with communicationHolding terminal shows.
10. battery management system voltage sample line fault diagnosis system according to claim 9, its featureBe, recover in module at voltage, the voltage of n joint and n+1 joint cell is recovered to adoptFollowing voltage Restoration Mechanism:
The detection voltage of the detection voltage to n joint cell and n+1 joint cell is averaged,This mean value saves respectively the voltage recovery value of cell and n+1 joint cell as n.
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| CN201610013734.2A CN105606950A (en) | 2016-01-05 | 2016-01-05 | Diagnosis method and diagnosis system for voltage sampling line fault of battery management system |
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| CN107478946A (en) * | 2016-08-29 | 2017-12-15 | 宝沃汽车（中国）有限公司 | Diagnostic method, system and the vehicle of the monomer voltage collection wire harness of electrokinetic cell |
| CN108375737A (en) * | 2017-12-29 | 2018-08-07 | 北京智行鸿远汽车有限公司 | A kind of diagnostic method of battery pack monomer voltage acquisition failure |
| CN109541471A (en) * | 2018-11-27 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of battery sampling line slap fault diagnosis method |
| CN110726936A (en) * | 2018-06-28 | 2020-01-24 | 微宏动力系统（湖州）有限公司 | Method for judging and processing voltage sampling fault and voltage extreme value fault |
| CN111537916A (en) * | 2020-05-28 | 2020-08-14 | 上海金脉汽车电子有限公司 | Voltage sampling chip power supply ground disconnection fault diagnosis method, device and equipment |
| CN116819405A (en) * | 2023-08-31 | 2023-09-29 | 绿进新能源科技(常熟)有限公司 | BMS sampling line detection system and method |
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| CN107478946A (en) * | 2016-08-29 | 2017-12-15 | 宝沃汽车（中国）有限公司 | Diagnostic method, system and the vehicle of the monomer voltage collection wire harness of electrokinetic cell |
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| CN111537916A (en) * | 2020-05-28 | 2020-08-14 | 上海金脉汽车电子有限公司 | Voltage sampling chip power supply ground disconnection fault diagnosis method, device and equipment |
| CN116819405A (en) * | 2023-08-31 | 2023-09-29 | 绿进新能源科技(常熟)有限公司 | BMS sampling line detection system and method |
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