CN106371018A - Cell-terminal-voltage-estimation-based fault diagnosis method and equipment for vehicle power battery - Google Patents
Cell-terminal-voltage-estimation-based fault diagnosis method and equipment for vehicle power battery Download PDFInfo
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- CN106371018A CN106371018A CN201510429152.8A CN201510429152A CN106371018A CN 106371018 A CN106371018 A CN 106371018A CN 201510429152 A CN201510429152 A CN 201510429152A CN 106371018 A CN106371018 A CN 106371018A
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Abstract
The invention provides a cell-terminal-voltage-estimation-based fault diagnosis method and equipment for a vehicle power battery. The method comprises: a signal associated with a current working parameter of a target power battery is collected by a sensor and an estimation value of the current working parameter of the target power battery is calculated based on the signal; according to the estimation value and a practical value, collected by another sensor, of the current working parameter of the target power battery, a current working state of the target power battery is estimated; and when abnormality of the current working state of the target power battery is determined, a fault processing operation is triggered. According to the invention, with the method and equipment, the current working state of the power battery can be estimated accurately with low costs.
Description
Technical field
The present invention relates to power cell of vehicle method for diagnosing faults and equipment, more particularly, to the power cell of vehicle method for diagnosing faults estimated based on battery terminal voltage and equipment.
Background technology
At present, becoming increasingly popular with electric automobile and hybrid vehicle, the real-time fault diagnosis for the electrokinetic cell (as vehicle provides the power source of active force or auxiliary power) in vehicle become more and more important.For example, the normal work of the electrokinetic cell in vehicle needs to rely on the current state of the accurate estimated driving force battery of the current operating parameters (such as running voltage, operating current or operating temperature) based on electrokinetic cell for the battery management system, and the data that the current operating parameters dependence of electrokinetic cell is transmitted from corresponding sensor, therefore, the degree of reliability of sensor signal directly affects the accurate estimation of electrokinetic cell state.
In existing technical scheme, in order to ensure the reliability of sensor signal, generally by the way of multisensor redundant arrangement, for example, same group of signal is measured using the sensor of two or more, to measure being mutually authenticated of result.
However, above-mentioned existing technical scheme there are the following problems: due to using the sensor of two or more for same group of signal demand, therefore relatively costly.
Accordingly, there exist following demand: provide current operating state and lower-cost power cell of vehicle method for diagnosing faults and the equipment being capable of accurate evaluation electrokinetic cell.
Content of the invention
In order to solve the problems of above-mentioned prior art, the present invention proposes the current operating state being capable of accurate evaluation electrokinetic cell and lower-cost power cell of vehicle method for diagnosing faults and equipment.
The purpose of the present invention is achieved through the following technical solutions:
A kind of power cell of vehicle failure diagnosis apparatus, described power cell of vehicle failure diagnosis apparatus include:
Parameter estimator, the signal that the current operating parameters with target power battery that described parameter estimator reception sensor is gathered are associated, and the estimated value based on the current operating parameters of target power battery described in this signal of change；
Assessment of failure device, the actual value of the current operating parameters of the described target power battery that described assessment of failure device is gathered based on described estimated value and other sensor assesses the current operating state of described target power battery, and sends troubleshooting instruction to trigger fault handling operation when the current operating state determining described target power battery occurs abnormal to fault processing unit；
Fault processing unit, described fault processing unit receive from assessment of failure device troubleshooting instruction after execute described fault handling operation.
It is preferable that the value of the current working current of target power battery described in signal designation that is associated of the described current operating parameters with target power battery in scheme disclosed above.
In scheme disclosed above it is preferable that the current operating parameters of described target power battery be described target power battery work as front voltage.
It is preferable that described parameter estimator to calculate the estimated value of the current operating parameters of described target power battery by using Kalman filtering algorithm and the battery equivalent circuit model corresponding with described target power battery in scheme disclosed above.
In scheme disclosed above, preferably, the current operating state of described target power battery assessed as follows by described assessment of failure device: repeatedly calculates the deviation between the estimated value of the current operating parameters of described target power battery and the actual value of current operating parameters of described target power battery with predetermined time interval；If the deviation calculating in calculating process that continuously repeats in pre-determined number exceedes predetermined Second Threshold more than the number of times of predetermined first threshold it is determined that the current operating state of described target power battery occurs to send troubleshooting instruction extremely and to described fault processing unit.
The purpose of the present invention is realized also by technical scheme below:
A kind of power cell of vehicle method for diagnosing faults, it comprises the following steps:
(a1) signal being associated with the current operating parameters of target power battery by sensor acquisition, and the estimated value based on the current operating parameters of target power battery described in this signal of change therewith；
(a2) actual value of the current operating parameters of the described target power battery being gathered based on described estimated value and other sensor assesses the current operating state of described target power battery；
(a3) trigger fault handling operation when the current operating state determining described target power battery occurs abnormal.
Power cell of vehicle method for diagnosing faults disclosed in this invention and equipment have the advantage that due to without using redundant sensor, thus can either accurate evaluation electrokinetic cell current operating state and cost is relatively low.
Brief description
In conjunction with accompanying drawing, the technical characteristic of the present invention and advantage will be more fully understood by those skilled in the art, wherein:
Fig. 1 is the schematic diagram of power cell of vehicle failure diagnosis apparatus according to an embodiment of the invention；
Fig. 2 is the flow chart of power cell of vehicle method for diagnosing faults according to an embodiment of the invention.
Specific embodiment
Fig. 1 is the schematic diagram of power cell of vehicle failure diagnosis apparatus according to an embodiment of the invention.As shown in figure 1, power cell of vehicle failure diagnosis apparatus disclosed in this invention include parameter estimator 1, assessment of failure device 2 and fault processing unit 3.The signal that the current operating parameters with target power battery that described parameter estimator 1 reception sensor is gathered are associated, and the estimated value based on the current operating parameters of target power battery described in this signal of change.The actual value of the current operating parameters of the described target power battery that described assessment of failure device 2 is gathered based on described estimated value and other sensor assesses the current operating state of described target power battery, and sends troubleshooting instruction to trigger fault handling operation when the current operating state determining described target power battery occurs abnormal to fault processing unit 3.Described fault processing unit 3 receive from assessment of failure device 2 troubleshooting instruction after execute described fault handling operation.
Preferably, in power cell of vehicle failure diagnosis apparatus disclosed in this invention, the value of the current working current of target power battery described in signal designation that the described current operating parameters with target power battery are associated.
Preferably, in power cell of vehicle failure diagnosis apparatus disclosed in this invention, the current operating parameters of described target power battery be described target power battery work as front voltage.
Preferably, in power cell of vehicle failure diagnosis apparatus disclosed in this invention, described parameter estimator 1 to calculate the estimated value of the current operating parameters of described target power battery by using Kalman filtering algorithm and the battery equivalent circuit model corresponding with described target power battery.
Preferably, in power cell of vehicle failure diagnosis apparatus disclosed in this invention, the current operating state of described target power battery assessed as follows by described assessment of failure device 2: repeatedly calculates the deviation between the estimated value of the current operating parameters of described target power battery and the actual value of current operating parameters of described target power battery with predetermined time interval；If the deviation calculating in calculating process that continuously repeats in pre-determined number is more than the number of times of predetermined first threshold and exceedes predetermined Second Threshold (outside having the result of calculation of kx time to be located at zone of reasonableness in for example calculating at ky time) it is determined that the current operating state of described target power battery occurs abnormal (such as voltage and/or current sampling data occur abnormal) and instructs to the transmission troubleshooting of described fault processing unit 3.
Therefore, power cell of vehicle failure diagnosis apparatus disclosed in this invention have the advantage that due to without using redundant sensor, thus can either accurate evaluation electrokinetic cell current operating state and cost is relatively low.
Fig. 2 is the flow chart of power cell of vehicle method for diagnosing faults according to an embodiment of the invention.As shown in Figure 2, power cell of vehicle method for diagnosing faults disclosed in this invention comprises the steps of the signal that (a1) is associated with the current operating parameters of target power battery by sensor acquisition, and the estimated value based on the current operating parameters of target power battery described in this signal of change therewith；(a2) actual value of the current operating parameters of the described target power battery being gathered based on described estimated value and other sensor assesses the current operating state of described target power battery；(a3) trigger fault handling operation when the current operating state determining described target power battery occurs abnormal.
Preferably, in power cell of vehicle method for diagnosing faults disclosed in this invention, the value of the current working current of target power battery described in signal designation that the described current operating parameters with target power battery are associated.
Preferably, in power cell of vehicle method for diagnosing faults disclosed in this invention, the current operating parameters of described target power battery be described target power battery work as front voltage.
Preferably, in power cell of vehicle method for diagnosing faults disclosed in this invention, described step (a1) further includes: to calculate the estimated value of the current operating parameters of described target power battery by using Kalman filtering algorithm and the battery equivalent circuit model corresponding with described target power battery.
Preferably, in power cell of vehicle method for diagnosing faults disclosed in this invention, assess the current operating state of described target power battery as follows: repeatedly calculate the deviation between the estimated value of the current operating parameters of described target power battery and the actual value of current operating parameters of described target power battery with predetermined time interval；If the deviation calculating in calculating process that continuously repeats in pre-determined number exceedes predetermined Second Threshold (outside having the result of calculation of kx time to be located at zone of reasonableness in for example calculating) at ky time it is determined that the current operating state of described target power battery occurs abnormal (such as voltage and/or current sampling data appearance are abnormal) and triggers fault handling operation more than the number of times of predetermined first threshold.
Therefore, power cell of vehicle method for diagnosing faults disclosed in this invention has the advantage that due to without using redundant sensor, thus can either accurate evaluation electrokinetic cell current operating state and cost is relatively low.
Although the present invention is to be described by above-mentioned preferred implementation, its way of realization is not limited to above-mentioned embodiment.It will be appreciated that in the case of without departing from spirit and scope of the present invention, those skilled in the art can make different changing and modifications to the present invention.
Claims (6)
1. a kind of power cell of vehicle failure diagnosis apparatus, described power cell of vehicle failure diagnosis apparatus include:
Parameter estimator, the signal that the current operating parameters with target power battery that described parameter estimator reception sensor is gathered are associated, and the estimated value based on the current operating parameters of target power battery described in this signal of change；
Assessment of failure device, the actual value of the current operating parameters of the described target power battery that described assessment of failure device is gathered based on described estimated value and other sensor assesses the current operating state of described target power battery, and sends troubleshooting instruction to trigger fault handling operation when the current operating state determining described target power battery occurs abnormal to fault processing unit；
Fault processing unit, described fault processing unit receive from assessment of failure device troubleshooting instruction after execute described fault handling operation.
2. power cell of vehicle failure diagnosis apparatus according to claim 1 are it is characterised in that the value of the current working current of target power battery described in signal designation that is associated of the described current operating parameters with target power battery.
3. power cell of vehicle failure diagnosis apparatus according to claim 2 it is characterised in that the current operating parameters of described target power battery be described target power battery work as front voltage.
4. power cell of vehicle failure diagnosis apparatus according to claim 3, it is characterized in that, described parameter estimator to calculate the estimated value of the current operating parameters of described target power battery by using Kalman filtering algorithm and the battery equivalent circuit model corresponding with described target power battery.
5. power cell of vehicle failure diagnosis apparatus according to claim 4, it is characterized in that, the current operating state of described target power battery assessed as follows by described assessment of failure device: repeatedly calculates the deviation between the estimated value of the current operating parameters of described target power battery and the actual value of current operating parameters of described target power battery with predetermined time interval；If the deviation calculating in calculating process that continuously repeats in pre-determined number exceedes predetermined Second Threshold more than the number of times of predetermined first threshold it is determined that the current operating state of described target power battery occurs to send troubleshooting instruction extremely and to described fault processing unit.
6. a kind of power cell of vehicle method for diagnosing faults, it comprises the following steps:
(a1) signal being associated with the current operating parameters of target power battery by sensor acquisition, and the estimated value based on the current operating parameters of target power battery described in this signal of change therewith；
(a2) actual value of the current operating parameters of the described target power battery being gathered based on described estimated value and other sensor assesses the current operating state of described target power battery；
(a3) trigger fault handling operation when the current operating state determining described target power battery occurs abnormal.
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| CN201510429152.8A CN106371018B (en) | 2015-07-21 | 2015-07-21 | Power cell of vehicle method for diagnosing faults and equipment based on battery terminal voltage estimation |
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| CN110927605A (en) * | 2017-04-18 | 2020-03-27 | 华为技术有限公司 | Method and device for estimating state of health of battery |
| CN112660144A (en) * | 2020-12-04 | 2021-04-16 | 上汽通用五菱汽车股份有限公司 | Yaw rate filtering method, control terminal, vehicle and storage medium |
| CN113884884A (en) * | 2021-10-21 | 2022-01-04 | 山东大学 | Power battery pack fault diagnosis method and system based on correlation |
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