CN108001259A - A kind of electric automobile hybrid power system fault detection method - Google Patents
A kind of electric automobile hybrid power system fault detection method Download PDFInfo
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- CN108001259A CN108001259A CN201711062832.6A CN201711062832A CN108001259A CN 108001259 A CN108001259 A CN 108001259A CN 201711062832 A CN201711062832 A CN 201711062832A CN 108001259 A CN108001259 A CN 108001259A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a kind of electric automobile hybrid power system fault detection method, the charge-discharge characteristic of cell voltage has been used well, and the method judged, being judged failure promptly and accurately are decomposed by software data.In the present invention, the method that judges is combined using monomer pressure difference variation characteristic and system pressure difference characteristic to judging failure, failure erroneous judgement is prevented, avoids increase hardware cost from detecting failure, be conducive to cost-effective, and be conducive to find security risk as early as possible.
Description
Technical field
The present invention relates to technical field of power battery management, more particularly to a kind of electric automobile hybrid power system fault detect
Method.
Background technology
With the development of new-energy automobile industry, market is more and more stronger to the demand of high course continuation mileage, passes through single mould
Group increase cell parallel number, to increase the method for battery system electricity, is unfavorable for single module and carries out heat management, while can increase
Add the use cost of single module.Single module number of parallel how is reduced, while meets wanting for the high electricity of vehicle battery system
Problem is sought, can solve the problems, such as this by way of dual battery system parallel running.
But when dual system parallel running, promptly and accurately it need to detect that some system high pressure goes offline.Prevent individual system
Running current is excessive to be caused to damage to battery, while avoids single operation for a long time from causing the consistent sex differernce of system monomer to become larger.Pass
System detection method can so increase hardware cost by increasing branch Hall or using high-voltage detecting circuit come failure judgement.
Therefore, in the case of can be by going offline in high pressure, the situation of change of analysis voltage characteristic detects failure.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of electric automobile hybrid power system fault detect
Method.
A kind of electric automobile hybrid power system fault detection method proposed by the present invention, hybrid power system is by the first dynamical system
System and the second dynamical system composition, the detection method, it is first determined hybrid power system is in discharge condition or charged state, so
Afterwards according to charged state and discharge condition, the full electricity of analysis single module electricity, electricity are normal, electricity feeds monomer under three kinds of states
Pressure difference, the first system pressure difference and second system pressure difference variation characteristic, carry out breakdown judge, and the first system pressure difference is the first system electricity
The difference between peak and the first system voltage minimum is pressed, second system pressure difference is second system voltage peak and second
Difference between system voltage minimum, difference of the monomer pressure difference between monomer voltage peak and monomer voltage minimum,
Monomer voltage is the sum of the first system voltage and second system voltage.
Preferably, under charged state, when monomer voltage peak is more than default monomer charging upper limit value, then double dynamical system
System is in electricity full power state；When monomer voltage peak is less than or equal to default monomer charging upper limit value and more than default
Monomer charging lower limit, then hybrid power system be in electricity normal condition；When monomer voltage peak is less than under monomer charging
Limit value, then hybrid power system be in electricity feed condition；
Under discharge condition, when monomer voltage peak is more than default monomer electric discharge upper limit value, then hybrid power system is in
Electricity full power state；When monomer voltage peak is less than or equal to default monomer electric discharge upper limit value and is more than default monomer
Discharge lower limit, then hybrid power system be in electricity normal condition；When monomer voltage peak be less than monomer electric discharge lower limit, then
Hybrid power system is in electricity feed condition.
Preferably, monomer charging upper limit value is 3.45V, and monomer charging lower limit be 3.2V, and monomer discharges upper limit value 3.4V,
Monomer electric discharge lower limit is 3.2V.
Preferably, according to the comparison of charging current and default charging or discharging current threshold value, judge whether hybrid power system enters
Charged state or discharge condition.
Preferably, charging or discharging current threshold value is 0.2C.
Preferably, the concrete mode for carrying out breakdown judge is：According to monomer pressure difference, the first system pressure difference and second system pressure
Difference obtains the number of stoppages, if the number of stoppages is more than or equal to 2, judges that system high pressure goes offline failure；If the number of stoppages
Less than 2, then rejudge.
Preferably, under charged state, the system failure judges to comprise the following steps：
Under electricity full power state, by monomer pressure differential deltap V1Compared with default first threshold, if monomer pressure differential deltap V1Greatly
In first threshold, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than first threshold and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for first threshold and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times；
Electricity under normal circumstances, by monomer pressure differential deltap V1Compared with default second threshold, if monomer pressure differential deltap V1Greatly
In second threshold, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than second threshold and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for second threshold and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times；
Under electricity feed condition, by monomer pressure differential deltap V1With default 3rd threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 3rd threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 3rd threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 3rd threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times；
3rd threshold value is more than first threshold, and first threshold is more than second threshold.
Preferably, first threshold 0.3V, second threshold 0.1V, the 3rd threshold value are 0.35V.
Preferably, under discharge condition, the system failure judges to comprise the following steps：
Under electricity full power state, by monomer pressure differential deltap V1With default 4th threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 4th threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 4th threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 4th threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times；
Electricity under normal circumstances, by monomer pressure differential deltap V1With default 5th threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 5th threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 5th threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 5th threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times；
Under electricity feed condition, by monomer pressure differential deltap V1With default 6th threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 6th threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 6th threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 6th threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times；
6th threshold value is more than the 4th threshold value, and the 4th threshold value is more than the 5th threshold value.
Preferably, the 4th threshold value is 0.2V, and the 5th threshold value is 0.08V, and the 6th threshold value is 0.3V.
A kind of electric automobile hybrid power system fault detection method proposed by the present invention, has used cell voltage well
Charge-discharge characteristic, the method judged, being judged failure promptly and accurately are decomposed by software data.
In the present invention, the method judged is combined to being carried out to failure using monomer pressure difference variation characteristic and system pressure difference characteristic
Judge, prevent failure erroneous judgement, avoid increase hardware cost from detecting failure, be conducive to cost-effective, and be conducive to send out as early as possible
Existing security risk.
Brief description of the drawings
Fig. 1 is a kind of electric automobile hybrid power system fault detection method flow chart proposed by the present invention under charged state；
Fig. 2 is a kind of electric automobile hybrid power system fault detection method flow chart proposed by the present invention under discharge condition；
Fig. 3 is the monomer ceiling voltage change curve under to 537.6V/200AH battery modules with 0.33C charge conditions.
Embodiment
With reference to Fig. 1, a kind of electric automobile hybrid power system fault detection method proposed by the present invention, hybrid power system is by the
One dynamical system and the second dynamical system composition.The detection method, it is first determined hybrid power system is in discharge condition and still fills
Electricity condition, then according to charged state and discharge condition, the full electricity of analysis single module electricity, electricity are normal, electricity feeds three kinds
Monomer pressure difference, the first system pressure difference and second system pressure difference variation characteristic under state, carry out breakdown judge.The first system pressure difference is
Difference between the first system voltage peak and the first system voltage minimum, second system pressure difference for second system voltage most
Difference between high level and second system voltage minimum, monomer pressure difference for monomer voltage peak and monomer voltage minimum it
Between difference, monomer voltage is the sum of the first system voltage and second system voltage.
It is when monomer voltage peak is more than default monomer charging upper limit value, then double under charged state in present embodiment
Dynamical system is in electricity full power state；When monomer voltage peak is less than or equal to default monomer charging upper limit value and big
In default monomer charge lower limit, then hybrid power system be in electricity normal condition；When monomer voltage peak is less than monomer
Charge lower limit, then hybrid power system is in electricity feed condition.
Under discharge condition, when monomer voltage peak is more than default monomer electric discharge upper limit value, then hybrid power system is in
Electricity full power state；When monomer voltage peak is less than or equal to default monomer electric discharge upper limit value and is more than default monomer
Discharge lower limit, then hybrid power system be in electricity normal condition；When monomer voltage peak be less than monomer electric discharge lower limit, then
Hybrid power system is in electricity feed condition.
In present embodiment, according to the comparison of charging current and default charging or discharging current threshold value, judge that hybrid power system is
It is no to enter charged state or discharge condition.That is, if under charge condition, charging current is more than charging or discharging current threshold value, then judges
Hybrid power system enters charged state；If under discharge scenario, discharge current is more than charging or discharging current threshold value, then judges double dynamical system
System enters discharge condition.
In present embodiment, the concrete mode for carrying out breakdown judge is：According to monomer pressure difference, the first system pressure difference and second
System pressure difference obtains the number of stoppages, if the number of stoppages is more than or equal to 2, judges that system high pressure goes offline failure；If therefore
Hinder number and be less than 2, then abandon this failure, rejudge.
Specifically, under charged state, the system failure judges to comprise the following steps：
Under electricity full power state, by monomer pressure differential deltap V1Compared with default first threshold, if monomer pressure differential deltap V1Greatly
In first threshold, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than first threshold and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for first threshold and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times.
Electricity under normal circumstances, by monomer pressure differential deltap V1Compared with default second threshold, if monomer pressure differential deltap V1Greatly
In second threshold, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than second threshold and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for second threshold and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times.
Under electricity feed condition, by monomer pressure differential deltap V1With default 3rd threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 3rd threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 3rd threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 3rd threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times.
3rd threshold value is more than first threshold, and first threshold is more than second threshold.
Under discharge condition, the system failure judges to comprise the following steps：
Under electricity full power state, by monomer pressure differential deltap V1With default 4th threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 4th threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 4th threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 4th threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times.
Electricity under normal circumstances, by monomer pressure differential deltap V1With default 5th threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 5th threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 5th threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 5th threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times.
Under electricity feed condition, by monomer pressure differential deltap V1With default 6th threshold value comparison, if monomer pressure differential deltap V1Greatly
In the 6th threshold value, then the system failure is judged 1 time；If the first system pressure differential deltap VAMore than the 6th threshold value and the first dynamical system
The product of battery strings number, alternatively, second system pressure differential deltap VBMore than multiplying for the 6th threshold value and the battery strings number of the second dynamical system
Product, then judge the system failure 2 times.
6th threshold value is more than the 4th threshold value, and the 4th threshold value is more than the 5th threshold value.
Further solution is done to the electric automobile hybrid power system fault detection method below in conjunction with a specific embodiment
Release.
In the present embodiment, charging or discharging current threshold value is 0.2C, and monomer charging upper limit value is 3.45V, and monomer charging lower limit is
3.2V, monomer electric discharge upper limit value 3.4V, monomer electric discharge lower limit is 3.2V, first threshold 0.3V, second threshold 0.1V,
3rd threshold value is 0.35V, and the 4th threshold value is 0.2V, and the 5th threshold value is 0.08V, and the 6th threshold value is 0.3V.
In the present embodiment, the voltage of voltage and the second dynamical system for the first dynamical system samples, each time
Sampled data includes the first system voltage peak, the first system voltage minimum, second system voltage peak and the second system
System voltage minimum.
In the present embodiment, when hybrid power system charges, if charging current is more than 0.2C, confirm that hybrid power system enters
Charged state, judges monomer voltage peak and monomer voltage minimum, determines battery capacity situation.
When monomer voltage peak is more than 3.45V, determine hybrid power system in electricity full power state.At this time, it is if single
Body pressure differential deltap V1>0.3V, is judged as the system failure 1 time；If the first system pressure differential deltap VA>The dynamical system of 0.3V × first
Battery strings number, alternatively, second system pressure differential deltap VB>The battery strings number of the dynamical system of 0.3V × second, then judge the system failure 2
It is secondary.
When monomer voltage peak is between 3.2V to 3.45V, determine hybrid power system in electricity normal condition.This
When, if monomer pressure differential deltap V1>0.1V, is judged as the system failure 1 time；If the first system pressure differential deltap VA>0.1V × the first is dynamic
The battery strings number of Force system, alternatively, second system pressure differential deltap VB>The battery strings number of the dynamical system of 0.1V × second, then judge system
Failure of uniting 2 times.
When monomer voltage peak is less than 3.2V, determine hybrid power system in electricity feed condition.At this time, if monomer pressure
Poor Δ V1>0.35V, is judged as the system failure 1 time；If the first system pressure differential deltap VA>The battery of the dynamical system of 0.35V × first
String number, alternatively, second system pressure differential deltap VB>The battery strings number of the dynamical system of 0.35V × second, then judge the system failure 2 times.
In the present embodiment, when hybrid power system discharges, if discharge current is more than 0.2C, confirm that hybrid power system enters
Discharge condition, judges monomer voltage peak and monomer voltage minimum, determines battery capacity situation.
When monomer voltage peak is more than 3.4V, determine hybrid power system in electricity full power state.At this time, if monomer
Pressure differential deltap V1>0.2V, is judged as the system failure 1 time；If the first system pressure differential deltap VA>The electricity of the dynamical system of 0.2V × first
Pond string number, alternatively, second system pressure differential deltap VB>The battery strings number of the dynamical system of 0.2V × second, then judge the system failure 2 times.
When monomer voltage peak is between 3.2V to 3.4V, determine hybrid power system in electricity normal condition.At this time,
If monomer pressure differential deltap V1>0.08V, is judged as the system failure 1 time；If the first system pressure differential deltap VA>0.0.08V × first move
The battery strings number of Force system, alternatively, second system pressure differential deltap VB>The battery strings number of the dynamical system of 0.08V × second, then judge system
Failure of uniting 2 times.
When monomer voltage peak is less than 3.2V, determine hybrid power system in electricity feed condition.At this time, if monomer pressure
Poor Δ V1>0.3V, is judged as the system failure 1 time；If the first system pressure differential deltap VA>The battery strings of the dynamical system of 0.3V × first
Number, alternatively, second system pressure differential deltap VB>The battery strings number of the dynamical system of 0.3V × second, then judge the system failure 2 times.
The present invention is described in further details with reference to instantiation.With two 537.6V/100AH battery systems simultaneously
A 537.6V/200AH hybrid power system is unified into, 0.33C charging measurements are carried out with single system and dual system respectively to the system
Analysis voltage variation characteristic.With reference to Fig. 3, wherein curve 1 is dual system charging curve, and curve 2 is single system charging curve.Pass through
Tracing analysis is worked as to be changed in full power state, feed condition and in normal state of charge pressure difference respectively with single system runtime system
It is all big, therefore the characteristic of pressure difference change greatly when can be run by single system, accurately analyze and go offline feelings with the presence or absence of single system
Condition.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of electric automobile hybrid power system fault detection method, hybrid power system is by the first dynamical system and the second dynamical system
System composition, the detection method are characterized in that, it is first determined hybrid power system is in discharge condition or charged state, then basis
Charged state and discharge condition, the full electricity of analysis single module electricity, electricity are normal, electricity feeds monomer pressure difference under three kinds of states,
The first system pressure difference and second system pressure difference variation characteristic, carry out breakdown judge, the first system pressure difference for the first system voltage most
Difference between high level and the first system voltage minimum, second system pressure difference are second system voltage peak and second system
Difference between voltage minimum, difference of the monomer pressure difference between monomer voltage peak and monomer voltage minimum, monomer
Voltage is the sum of the first system voltage and second system voltage.
2. electric automobile hybrid power system fault detection method as claimed in claim 1, it is characterised in that under charged state,
When monomer voltage peak is more than default monomer charging upper limit value, then hybrid power system is in electricity full power state；Work as monomer
Voltage peak is less than or equal to default monomer charging upper limit value and more than default monomer charging lower limit, then double dynamical
System is in electricity normal condition；When monomer voltage peak is less than monomer charging lower limit, then hybrid power system is in electricity
Feed condition；
Under discharge condition, when monomer voltage peak is more than default monomer electric discharge upper limit value, then hybrid power system is in electricity
Full power state；When monomer voltage peak is less than or equal to default monomer electric discharge upper limit value and discharges more than default monomer
Lower limit, then hybrid power system be in electricity normal condition；When monomer voltage peak be less than monomer electric discharge lower limit, then it is double acting
Force system is in electricity feed condition.
3. electric automobile hybrid power system fault detection method as claimed in claim 2, it is characterised in that monomer charging upper limit
It is 3.2V to be worth for 3.45V, monomer charging lower limit, and monomer electric discharge upper limit value 3.4V, monomer electric discharge lower limit is 3.2V.
4. electric automobile hybrid power system fault detection method as claimed in claim 1, it is characterised in that according to charging current
With the comparison of default charging or discharging current threshold value, judge whether hybrid power system enters charged state or discharge condition.
5. electric automobile hybrid power system fault detection method as claimed in claim 4, it is characterised in that charging or discharging current threshold value
For 0.2C.
6. such as claim 1 to 5 any one of them electric automobile hybrid power system fault detection method, it is characterised in that into
The concrete mode of row breakdown judge is：The number of stoppages is obtained according to monomer pressure difference, the first system pressure difference and second system pressure difference, such as
The fruit number of stoppages is more than or equal to 2, then judges that system high pressure goes offline failure；If the number of stoppages is less than 2, rejudge.
7. electric automobile hybrid power system fault detection method as claimed in claim 6, it is characterised in that under charged state,
The system failure judges to comprise the following steps：
Under electricity full power state, by monomer pressure differential deltap V1Compared with default first threshold, if monomer pressure differential deltap V1More than first
Threshold value, then judge the system failure 1 time；If the first system pressure differential deltap VAMore than first threshold and the battery strings of the first dynamical system
Several product, alternatively, second system pressure differential deltap VBMore than first threshold and the product of the battery strings number of the second dynamical system, then sentence
The system failure of breaking 2 times；
Electricity under normal circumstances, by monomer pressure differential deltap V1Compared with default second threshold, if monomer pressure differential deltap V1More than second
Threshold value, then judge the system failure 1 time；If the first system pressure differential deltap VAMore than second threshold and the battery strings of the first dynamical system
Several product, alternatively, second system pressure differential deltap VBMore than the product of second threshold and the battery strings number of the second dynamical system, then sentence
The system failure of breaking 2 times；
Under electricity feed condition, by monomer pressure differential deltap V1With default 3rd threshold value comparison, if monomer pressure differential deltap V1More than the 3rd
Threshold value, then judge the system failure 1 time；If the first system pressure differential deltap VAMore than the 3rd threshold value and the battery strings of the first dynamical system
Several product, alternatively, second system pressure differential deltap VBMore than the 3rd threshold value and the product of the battery strings number of the second dynamical system, then sentence
The system failure of breaking 2 times；
3rd threshold value is more than first threshold, and first threshold is more than second threshold.
8. electric automobile hybrid power system fault detection method as claimed in claim 7, it is characterised in that first threshold is
0.3V, second threshold 0.1V, the 3rd threshold value are 0.35V.
9. electric automobile hybrid power system fault detection method as claimed in claim 6, it is characterised in that under discharge condition,
The system failure judges to comprise the following steps：
Under electricity full power state, by monomer pressure differential deltap V1With default 4th threshold value comparison, if monomer pressure differential deltap V1More than the 4th
Threshold value, then judge the system failure 1 time；If the first system pressure differential deltap VAMore than the 4th threshold value and the battery strings of the first dynamical system
Several product, alternatively, second system pressure differential deltap VBMore than the 4th threshold value and the product of the battery strings number of the second dynamical system, then sentence
The system failure of breaking 2 times；
Electricity under normal circumstances, by monomer pressure differential deltap V1With default 5th threshold value comparison, if monomer pressure differential deltap V1More than the 5th
Threshold value, then judge the system failure 1 time；If the first system pressure differential deltap VAMore than the 5th threshold value and the battery strings of the first dynamical system
Several product, alternatively, second system pressure differential deltap VBMore than the 5th threshold value and the product of the battery strings number of the second dynamical system, then sentence
The system failure of breaking 2 times；
Under electricity feed condition, by monomer pressure differential deltap V1With default 6th threshold value comparison, if monomer pressure differential deltap V1More than the 6th
Threshold value, then judge the system failure 1 time；If the first system pressure differential deltap VAMore than the 6th threshold value and the battery strings of the first dynamical system
Several product, alternatively, second system pressure differential deltap VBMore than the 6th threshold value and the product of the battery strings number of the second dynamical system, then sentence
The system failure of breaking 2 times；
6th threshold value is more than the 4th threshold value, and the 4th threshold value is more than the 5th threshold value.
10. electric automobile hybrid power system fault detection method as claimed in claim 9, it is characterised in that the 4th threshold value is
0.2V, the 5th threshold value are 0.08V, and the 6th threshold value is 0.3V.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110837050A (en) * | 2019-11-27 | 2020-02-25 | 安徽江淮汽车集团股份有限公司 | Battery pack differential pressure fault judgment method and device and storage medium |
| CN110920463A (en) * | 2019-12-06 | 2020-03-27 | 华人运通(江苏)技术有限公司 | BMS self-adaptive pressure awakening method and device and storage medium |
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