CN109975711A - Battery failure detection method and device - Google Patents
Battery failure detection method and device Download PDFInfo
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- CN109975711A CN109975711A CN201711466136.1A CN201711466136A CN109975711A CN 109975711 A CN109975711 A CN 109975711A CN 201711466136 A CN201711466136 A CN 201711466136A CN 109975711 A CN109975711 A CN 109975711A
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- battery pack
- test point
- temperature
- coolant liquid
- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
This disclosure relates to which a kind of battery failure detection method and device, are related to field of batteries, the method includes the detection temperature at test point current time in related status information in acquisition battery pack and the battery pack；The estimated temperature of the test point is obtained based on battery pack thermal model according to the related status information；Judge whether the test point exception occurs according to the detection temperature at the estimated temperature and the current time；The failure for judging the battery pack according to there is abnormal test point.So as to estimate each possible temperature of test point in battery pack in real time according to battery pack thermal model, and using the temperature as standard, it is compared in the actually detected obtained temperature of each test point, to judge whether the temperature of each test point exception occurs, it is excessively single that threshold value Rule of judgment is avoided in this way, the problem of cannot being adjusted according to vehicle working condition, and fault point can be determined according to there is abnormal test point, there is location of fault so as to accurate judgement.
Description
Technical field
This disclosure relates to battery art, and in particular, to a kind of battery failure detection method and device.
Background technique
Battery pack has an application conglomerate is multi-field, especially becomes the new trend of China Automobile Industry in new-energy automobile
Under the premise of important directions, in the pure electric automobile and hybrid vehicle in new-energy automobile, power battery pack is mostly used
As main electrical energy storage device.However power battery pack be influenced by temperature it is larger, therefore in the application often utilize battery
Group heat management system to carry out temperature control to power battery pack.In general, the temperature detection for battery pack usually passes through logic
Threshold value is realized, by numerical value such as the temperature of each battery core or battery modules, voltage, electric currents in acquisition battery pack, with standard
Logic threshold compare, if it exceeds threshold value then think battery break down etc..But due to vehicle traveling process
In operating condition it is complicated, do not ensured that by the way that one or several threshold values are arranged and accurately identify battery failure, Ke Nengfa
Raw the case where failing to pinpoint a disease in diagnosis disconnected or overprotection.
Summary of the invention
Purpose of this disclosure is to provide a kind of battery failure detection method and device, this method can utilize battery pack heat
Model detects abnormal test point occur in the case where not occurring temperature in battery pack more than threshold value, and different according to occurring
Normal test point carries out fault location.
To achieve the goals above, the disclosure provides a kind of battery failure detection method, which comprises
Obtain the detection temperature at test point current time in related status information and the battery pack in battery pack；
The estimated temperature of the test point is obtained based on battery pack thermal model according to the related status information；
Judge whether the test point exception occurs according to the detection temperature at the estimated temperature and the current time；
The failure for judging the battery pack according to there is abnormal test point.
Optionally, the test point includes:
Multiple battery core test points, coolant liquid water outlet and coolant liquid water inlet.
Optionally, related status information includes: cooling fluid pump revolving speed, coolant liquid water valve aperture, institute in the battery pack
State the remaining capacity of battery pack, the health degree of the battery pack, the input and output electric current of the battery pack, the inspection of the multiple battery core
The detection temperature of any one battery core test point last moment, the detection temperature of coolant liquid water inlet last moment in measuring point；
The estimation for obtaining test point in the battery pack based on battery pack thermal model according to the related status information
Temperature includes:
It is obtained in the battery pack thermal model according to the remaining capacity of the battery pack and the health degree of the battery pack
The fever internal resistance of average each battery core in the battery pack；
It is put down in the battery pack thermal model according to the input and output electric current of the fever internal resistance and the battery pack
The calorific value of each battery core；
According to the detection temperature of the battery core test point last moment, the detection temperature of the coolant liquid water inlet last moment
Degree, the cooling fluid pump revolving speed and the coolant liquid water valve aperture obtain the battery core detection in the battery pack thermal model
The heat exchange amount between battery core and the coolant liquid where point；
According to the detection temperature of the battery core test point last moment, the calorific value of average each battery core, the heat
It is current that exchange capacity and battery pack thermal capacitance and unit time step-length obtain the battery core test point in the battery pack thermal model
The estimated temperature at moment, wherein the battery pack thermal capacitance and the unit time step-length are consolidating in the battery pack thermal model
Determine parameter.
Optionally, related status information includes: cooling fluid pump revolving speed, coolant liquid water valve aperture, institute in the battery pack
State the detection temperature of each battery core test point last moment in multiple battery core test points, the inspection of coolant liquid water inlet last moment
Testing temperature；
The estimation for obtaining test point in the battery pack based on battery pack thermal model according to the related status information
Temperature includes:
It is obtained in the battery pack thermal model often according to the detection temperature of each battery core test point last moment
Average detected temperature of one battery core in last moment；
According to the average detected temperature, the detection temperature of the coolant liquid water inlet last moment, the coolant liquid water
Revolution speed and the coolant liquid water valve aperture obtained in the battery pack thermal model in the battery pack all battery cores with it is described
Total heat exchange amount between coolant liquid；
According to total heat exchange amount, the detection temperature of the coolant liquid water inlet last moment, the coolant liquid thermal capacitance
The estimated temperature at the coolant liquid water outlet current time is obtained in the battery pack thermal model with unit time step-length,
In, the coolant liquid thermal capacitance and the unit time step-length are the preset parameters in the battery pack thermal model.
Optionally, related status information includes: mode that the coolant liquid carries out heat exchange in the battery pack；
When the mode that the coolant liquid carries out heat exchange is by radiator and external progress heat exchange, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, rotation speed of the fan, current environmental temperature, cooling
The detection temperature of liquid water outlet last moment；
The estimation for exporting test point in the battery pack based on battery pack thermal model according to the related status information
Temperature includes:
According to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the rotation speed of the fan, the current environment temperature
Pipeline thermal losses in degree, the detection temperature of the coolant liquid water outlet last moment, the battery pack thermal management system is in institute
State the estimated temperature that the coolant liquid water inlet current time is obtained in battery pack thermal model, wherein the battery pack heat management
Pipeline thermal losses in system is the preset parameter in the battery pack thermal model.
Optionally, related status information includes: mode that the coolant liquid carries out heat exchange in the battery pack；
When the mode that the coolant liquid carries out heat exchange is to carry out heat exchange by heat exchanger and refrigerant, the electricity
Pond intra class correlation status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, coolant liquid water outlet last moment
Detect temperature, temperature difference, refrigerant pump rotary speed, the refrigerant water valve aperture of last moment refrigerant water outlet and water inlet；
The estimation for exporting test point in the battery pack based on battery pack thermal model according to the related status information
Temperature includes:
According to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the coolant liquid water outlet last moment
Detect temperature difference, the refrigerant pump rotary speed, the refrigeration of temperature, the last moment refrigerant water outlet and water inlet
Pipeline thermal losses in agent water valve aperture, the battery pack thermal management system obtains the cooling in the battery pack thermal model
The estimated temperature at liquid water inlet current time, wherein the pipeline thermal losses in the battery pack thermal management system is the battery
Preset parameter in group thermal model.
Optionally, related status information includes: mode that the coolant liquid carries out heat exchange in the battery pack；
When the coolant liquid carry out heat exchange mode be by electric heater unit to carry out heat exchange when, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, the detection of coolant liquid water outlet last moment
The power of temperature, the electric heater unit；
The estimation for exporting test point in the battery pack based on battery pack thermal model according to the related status information
Temperature includes:
According to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the coolant liquid water outlet last moment
Temperature, the power of the electric heater unit, the pipeline thermal losses in the battery pack thermal management system are detected in the battery pack
The estimated temperature at the coolant liquid water inlet current time is obtained in thermal model, wherein in the battery pack thermal management system
Pipeline thermal losses is the preset parameter in the battery pack thermal model.
Optionally, whether the detection temperature according to the estimated temperature and the current time judges the test point
Exception occur includes:
When the detection temperature deviation at the estimated temperature and the current time is greater than preset threshold, and the estimated temperature
When the duration for being greater than preset threshold with the detection temperature deviation at the current time is greater than preset duration, the detection is determined
Point occurs abnormal.
Optionally, the failure that the battery pack is judged according to the test point for exception occur includes:
When occurring abnormal test point number in the multiple battery core test point less than predetermined number, detection occurs abnormal
Battery core test point voltage it is whether abnormal, if the voltage for abnormal battery core test point occur is also abnormal, determine the electricity
Battery core failure where core test point determines the battery core detection if the voltage for abnormal battery core test point occur is normal
The temperature sensor fault of point；
When occur in multiple battery core test points of any one coolant pipe road abnormal test point number be greater than it is default
When ratio, the coolant line failure is determined；
When there is any one or the more persons in following state, the battery pack overall thermal management system failure is determined:
Occurs abnormal test point number in the multiple battery core test point more than or equal to the predetermined number；
The coolant liquid water outlet test point is abnormal；And
The coolant liquid water inlet test point is abnormal.
The disclosure also provides a kind of battery failure detection device, and described device includes:
Module is obtained, for obtaining the inspection at test point current time in related status information and the battery pack in battery pack
Testing temperature；
Temperature estimation module, for obtaining the test point based on battery pack thermal model according to the related status information
Estimated temperature；
Abnormal judgment module, for judging the detection according to the detection temperature at the estimated temperature and the current time
Whether point there is exception；
Breakdown judge module, the failure for judging the battery pack according to there is abnormal test point.
Optionally, the test point includes:
Multiple battery core test points, coolant liquid water outlet and coolant liquid water inlet.
Optionally, related status information includes: cooling fluid pump revolving speed, coolant liquid water valve aperture, institute in the battery pack
State the remaining capacity of battery pack, the health degree of the battery pack, the input and output electric current of the battery pack, the inspection of the multiple battery core
The detection temperature of any one battery core test point last moment, the detection temperature of coolant liquid water inlet last moment in measuring point；
The temperature estimation module includes:
Submodule is estimated in battery core internal resistance, for being existed according to the remaining capacity of the battery pack and the health degree of the battery pack
The fever internal resistance of average each battery core in the battery pack is obtained in the battery pack thermal model；
Submodule is estimated in battery core calorific value, for being existed according to the input and output electric current of the fever internal resistance and the battery pack
The calorific value of averagely each battery core is obtained in the battery pack thermal model；
Battery core heat exchange amount estimates submodule, for according to the detection temperature of the battery core test point last moment, described
The detection temperature of coolant liquid water inlet last moment, the cooling fluid pump revolving speed and the coolant liquid water valve aperture are in the electricity
The heat exchange amount between the battery core and the coolant liquid where the battery core test point is obtained in the group thermal model of pond；
Battery core test point temperature estimation submodule, for the detection temperature according to the battery core test point last moment, institute
Calorific value, the heat exchange amount and the battery pack thermal capacitance and unit time step-length for stating averagely each battery core are in the battery pack heat
The estimated temperature at the battery core test point current time is obtained in model, wherein the battery pack thermal capacitance and the unit time
Step-length is the preset parameter in the battery pack thermal model.
Optionally, related status information includes: cooling fluid pump revolving speed, coolant liquid water valve aperture, institute in the battery pack
State the detection temperature of each battery core test point last moment in multiple battery core test points, the inspection of coolant liquid water inlet last moment
Testing temperature；
The temperature estimation module includes:
Battery core mean temperature estimates submodule, for the detection temperature according to each battery core test point last moment
Each battery core is obtained in the battery pack thermal model in the average detected temperature of last moment；
The total heat exchange amount of battery core estimates submodule, for according to the average detected temperature, the coolant liquid water inlet
The detection temperature at one moment, the cooling fluid pump revolving speed and the coolant liquid water valve aperture obtain in the battery pack thermal model
Total heat exchange amount into the battery pack between all battery cores and the coolant liquid；
Coolant liquid outlet temperature estimates submodule, for according to total heat exchange amount, the coolant liquid water inlet
The detection temperature at one moment, the coolant liquid thermal capacitance and unit time step-length obtain the cooling in the battery pack thermal model
The estimated temperature at liquid water outlet current time, wherein the coolant liquid thermal capacitance and the unit time step-length are the battery packs
Preset parameter in thermal model.
Optionally, related status information includes: mode that the coolant liquid carries out heat exchange in the battery pack；
When the mode that the coolant liquid carries out heat exchange is by radiator and external progress heat exchange, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, rotation speed of the fan, current environmental temperature, cooling
The detection temperature of liquid water outlet last moment；
The temperature estimation module includes:
Coolant liquid water inlet temperature estimation submodule, for according to the cooling fluid pump revolving speed, the coolant liquid water valve
Aperture, the rotation speed of the fan, the current environmental temperature, the detection temperature of the coolant liquid water outlet last moment, the electricity
Pipeline thermal losses in the group heat management system of pond obtains the coolant liquid water inlet current time in the battery pack thermal model
Estimated temperature, wherein the pipeline thermal losses in the battery pack thermal management system is the fixation in the battery pack thermal model
Parameter.
Optionally, related status information includes: mode that the coolant liquid carries out heat exchange in the battery pack；
When the mode that the coolant liquid carries out heat exchange is to carry out heat exchange by heat exchanger and refrigerant, the electricity
Pond intra class correlation status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, coolant liquid water outlet last moment
Detect temperature, temperature difference, refrigerant pump rotary speed, the refrigerant water valve aperture of last moment refrigerant water outlet and water inlet；
The temperature estimation module includes:
Coolant liquid water inlet temperature estimation submodule, for according to the cooling fluid pump revolving speed, the coolant liquid water valve
Aperture, the detection temperature of the coolant liquid water outlet last moment, the temperature of the last moment refrigerant water outlet and water inlet
Spend poor, described refrigerant pump rotary speed, the refrigerant water valve aperture, the pipeline thermal losses in the battery pack thermal management system
The estimated temperature at the coolant liquid water inlet current time is obtained in the battery pack thermal model, wherein the battery pack heat
Pipeline thermal losses in management system is the preset parameter in the battery pack thermal model.
Optionally, related status information includes: mode that the coolant liquid carries out heat exchange in the battery pack；
When the coolant liquid carry out heat exchange mode be by electric heater unit to carry out heat exchange when, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, the detection of coolant liquid water outlet last moment
The power of temperature, the electric heater unit；
The temperature estimation module includes:
Coolant liquid water inlet temperature estimation submodule, for according to the cooling fluid pump revolving speed, the coolant liquid water valve
Aperture, the detection temperature of the coolant liquid water outlet last moment, the power of the electric heater unit, the battery pack heat management
Pipeline thermal losses in system obtains the estimated temperature at the coolant liquid water inlet current time in the battery pack thermal model,
Wherein, the pipeline thermal losses in the battery pack thermal management system is the preset parameter in the battery pack thermal model.
Optionally, the abnormal judgment module is also used to:
When the detection temperature deviation at the estimated temperature and the current time is greater than preset threshold, and the estimated temperature
When the duration for being greater than preset threshold with the detection temperature deviation at the current time is greater than preset duration, the detection is determined
Point occurs abnormal.
Optionally, the breakdown judge module is also used to:
When occurring abnormal test point number in the multiple battery core test point less than predetermined number, detection occurs abnormal
Battery core test point voltage it is whether abnormal, if the voltage for abnormal battery core test point occur is also abnormal, determine described in
Battery core failure where battery core test point determines the battery core inspection if the voltage for abnormal battery core test point occur is normal
The temperature sensor fault of measuring point；
When occur in multiple battery core test points of any one coolant pipe road abnormal test point number be greater than it is default
When ratio, the coolant line failure is determined；
When there is any one or the more persons in following state, the battery pack overall thermal management system failure is determined:
Occurs abnormal test point number in the multiple battery core test point more than or equal to the predetermined number；
The coolant liquid water outlet test point is abnormal；And
The coolant liquid water inlet test point is abnormal.
Through the above technical solutions, can estimate in real time that each test point may in battery pack according to battery pack thermal model
Temperature be compared in the actually detected obtained temperature of each test point, to judge each detection and using the temperature as standard
Whether the temperature of point there is exception, and it is excessively single to avoid threshold value Rule of judgment in this way, cannot be carried out according to vehicle working condition
The problem of adjustment, and fault point can be determined according to there is abnormal test point, there is failure so as to accurate judgement
Position.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is the flow chart according to a kind of battery failure detection method of one exemplary embodiment of the disclosure.
Fig. 2 is that battery core detection is obtained in a kind of battery failure detection method according to disclosure another exemplary embodiment
The flow chart of point estimated temperature.
Fig. 3 is to obtain coolant liquid in a kind of battery failure detection method according to disclosure another exemplary embodiment to go out
The flow chart of mouth of a river estimated temperature.
Fig. 4 is to obtain coolant liquid in a kind of battery failure detection method according to disclosure another exemplary embodiment to enter
The flow chart of mouth of a river estimated temperature.
Fig. 5 is the schematic block diagram according to a kind of battery failure detection device of one exemplary embodiment of the disclosure.
Fig. 6 is temperature estimation block in a kind of battery failure detection device according to disclosure another exemplary embodiment
Schematic block diagram.
Description of symbols
10 obtain 20 temperature estimation module of module
30 40 breakdown judge modules of abnormal judgment module
201 battery core internal resistances estimate that submodule is estimated in 202 battery core calorific value of submodule
203 battery core heat exchange amounts estimate 204 battery core test point temperature estimation submodule of submodule
205 battery core mean temperatures estimate that the total heat exchange amount of 206 battery core of submodule estimates submodule
207 coolant liquid outlet temperatures estimate 208 coolant liquid water inlet temperature estimation submodule of submodule
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
Fig. 1 is the flow chart according to a kind of battery failure detection method of one exemplary embodiment of the disclosure.Such as Fig. 1 institute
Show, the method includes the steps 101 to step 104.
In a step 101, the inspection at test point current time in related status information and the battery pack in battery pack is obtained
Testing temperature.Relevant information may include that can describe any relevant information of battery state in battery pack, for example, it may be electric
Each test point of Chi Zuzhong is also possible to battery pack input and output electric current at any time, electricity in the detection temperature at other moment
The remaining capacity (State of Charge, SOH), health degree (State of Health, SOH) etc. of pressure either battery pack,
It can also be the working condition of each component in battery pack hot-pipe system, such as the revolving speed of each water pump, the aperture of each water valve, fan
Revolving speed, power of electric heater unit etc..
Test point in battery pack can carry out the adjustment of number and position according to practical situations, for example, detection
Point can be set in battery pack at each battery core, can also be provided only at the part battery core in battery pack, for detecting battery
The temperature of battery core in group can directly reflect the temperature conditions in battery pack, furthermore it is also possible to coolant liquid in battery pack in this way
Water outlet or water inlet be arranged test point, pass through the temperature to coolant liquid detection come indirectly to the temperature feelings in battery pack
Condition is judged.
In a step 102, the estimation of the test point is obtained based on battery pack thermal model according to the related status information
Temperature.Battery pack thermal model can be established in the case where offline by the methods of emulating or testing, and method for building up is
Technology well-known to those skilled in the art, is not described in more detail here.It wherein, may include such as battery in battery pack thermal model
The preset parameters such as the pipeline loss of group thermal capacitance, coolant liquid thermal capacitance, battery thermal management system within the unit time, to obtain detection
It is called when the estimated temperature of point, moreover it is possible to including obtaining each test point estimation temperature according to the related status information in battery pack
The information such as the correlation formula of degree or table.
It, can be according to test point position when the related status information according to battery pack obtains the estimated temperature of each test point
Difference, choose different related status information.
In step 103, judge that the test point is according to the detection temperature of the estimated temperature and the current time
No appearance is abnormal.
In a kind of possible embodiment, judge whether Yi Chang condition can be such as estimating when test point to test point
When calculating temperature and the detection temperature deviation at the current time greater than some preset threshold, it is different to judge that temperature occurs in the test point
Often, it can also be for example when the detection temperature deviation at test point estimated temperature and the current time is greater than some default threshold
Value, and the detection temperature deviation at the estimated temperature and the current time is greater than greater than the duration of some preset threshold
When preset duration, determine that temperature anomaly occurs in the test point.
At step 104, the failure for judging the battery pack according to there is abnormal test point.
According to the number and its positional relationship for abnormal test point occur, the specific failure feelings of battery pack can be judged
Condition.
In a kind of possible embodiment, when the test point temperature at battery core occurs abnormal: if test point position point
Certain predetermined quantity is dissipated and be less than, further the voltage in battery pack can be judged, if voltage is all everywhere in battery pack
It is without exception, then it may determine that the temperature sensor fault of abnormal test point occur；Also there is exception in voltage in battery pack, then
It may determine that abnormal test point battery core detected occur breaks down.Furthermore it is also possible to by abnormality detection point other
Feature judges other failures in battery pack, such as when multiple battery core test points of any one coolant pipe road
When the middle test point number for exception occur is greater than preset ratio, it is possible to determine that the coolant line failure；When in following state
Any one or more persons when occurring, it is possible to determine that the battery pack overall thermal manages the system failure: (1) the multiple battery core inspection
Occurs abnormal test point number in measuring point more than or equal to the predetermined number；(2) the coolant liquid water outlet test point is different
Often；(3) the coolant liquid water inlet test point is abnormal.
Step 101 to step 104 can recycle always execution, with detecting to battery pack in real time, avoid battery
The time interval of the problem of failure can not detect in group, the circulation can be with one of battery controller where battery pack
Control loop time interval is identical, is also possible to the multiple of a control loop time interval of the battery controller, in this way, working as
When the executor of step 101 to step 104 is the battery controller, the operating load of battery controller can reduce.
Through the above technical solutions, obtaining correlated condition in the temperature information and battery pack of each temperature detecting point of battery pack
Information is then able to estimate each possible temperature of test point in battery pack in real time according to battery pack thermal model, and with this
Temperature is standard, is compared in the actually detected obtained temperature of each test point, thus judge each test point temperature whether
Occur abnormal, it is excessively single to avoid threshold value Rule of judgment in this way, the problem of cannot being adjusted according to vehicle working condition, and
Fault point can be determined according to there is abnormal test point, location of fault occur so as to accurate judgement.
In a kind of possible embodiment, the test point includes: multiple battery core test points, coolant liquid water outlet and cold
But liquid water inlet.Multiple battery core test points can be to be distributed in battery pack with certain rule, is also possible to random distribution
In battery pack.
Fig. 2 is that battery core detection is obtained in a kind of battery failure detection method according to disclosure another exemplary embodiment
The flow chart of point estimated temperature.When obtaining battery core test point estimated temperature, related status information includes: cold in the battery pack
But liquid pump rotary speed, coolant liquid water valve aperture, the remaining capacity of the battery pack, the health degree of the battery pack, the battery
It is the input and output electric current of group, the detection temperature of any one battery core test point last moment in the multiple battery core test point, cold
But the detection temperature of liquid water inlet last moment.As shown in Fig. 2, the method comprising the steps of 201 to step 204.
In step 201, according to the remaining capacity of the battery pack (State of Charge, SOH) and the battery pack
Health degree (State of Health, SOH) average each battery core is obtained in the battery pack in the battery pack thermal model
Fever internal resistance.
In step 202, according to the input and output electric current of the fever internal resistance and the battery pack in the battery pack heat
The calorific value of averagely each battery core is obtained in model.The calorific value refers to average each battery core within the unit time
Calorific value, which is to execute the time interval that recycles to step 104 of step 101 shown in Fig. 1.Calorific value
Calculation formula can be for as shown in formula (1), wherein I indicates the input and output electric current of battery pack, and R indicates average each telecommunications
Fever internal resistance, Q indicates the calorific value of average each battery core.
Q=I2R (1)
In step 203, according to one on the detection temperature of the battery core test point last moment, the coolant liquid water inlet
The detection temperature at moment, the cooling fluid pump revolving speed and the coolant liquid water valve aperture obtain in the battery pack thermal model
The heat exchange amount between battery core and the coolant liquid where the battery core test point.The heat exchange amount referred within the unit time
Heat exchange amount between the battery core and coolant liquid.The heat exchange amount can pass through in battery pack thermal model according to above-mentioned information
Obtained by tabling look-up, it can also be obtained according to above-mentioned information by the calculation formula in battery pack thermal model.Battery core test point
The detection temperature of the test point before the detection temperature of last moment is a unit time.
In step 204, according to the hair of the detection temperature of the battery core test point last moment, average each battery core
Heat, the heat exchange amount and battery pack thermal capacitance and unit time step-length obtain the battery core in the battery pack thermal model
The estimated temperature at test point current time, wherein the battery pack thermal capacitance and the unit time step-length are the battery pack heat
Preset parameter in model.Unit time step-length be execute Fig. 1 shown in step 101 to step 104 circulation time
Interval.
The estimated temperature can be according to above-mentioned information as obtained by tabling look-up in battery pack thermal model, can also be according to upper
The information stated is obtained by the calculation formula in battery pack thermal model, for example, can be calculated according to formula (2),
In, TBattery core 1Indicate the estimated temperature at battery core test point current time, TBattery core 0Indicate the detection temperature of battery core test point last moment, Q
For the calorific value in last moment to each battery core average between current time, PBattery core/coolant liquidFor battery core and cooling in the unit time
Heat exchange amount between liquid, CBattery packIt is battery pack thermal capacitance, d is unit time step-length.
TBattery core 1=TBattery core 0+(Q-PBattery core/coolant liquid)/CBattery pack×d (2)
The step 201 shown according to fig. 2 to step 204 estimation battery core test point Current Temperatures when, in battery pack
The information for including in related status information can be obtained by the corresponding sensor of the information, can also be indirectly from battery pack
In obtained in corresponding management system, such as battery pack thermal management system etc..
Through the above technical solutions, can according to related status information in battery pack based on battery pack thermal model come to battery core
On temperature detecting point carry out the estimation of temperature, so as to be carried out according to the detection temperature of temperature and current time estimated
Whether extremely comparison judge the temperature of the test point, so that whether failure and where judge to battery pack.
Fig. 3 is to obtain coolant liquid in a kind of battery failure detection method according to disclosure another exemplary embodiment to go out
The flow chart of mouth of a river estimated temperature.Related status information includes: that cooling fluid pump revolving speed, coolant liquid water valve are opened in the battery pack
Degree, the detection temperature of each battery core test point last moment in the multiple battery core test point, on coolant liquid water inlet for the moment
The detection temperature at quarter.
As shown in figure 3, the method comprising the steps of 301 to step 303.
In step 301, according to the detection temperature of each battery core test point last moment in the battery pack heat
Each battery core is obtained in model in the average detected temperature of last moment.
In a kind of possible embodiment, it can also be counted according to the detection temperature of part battery core test point last moment
Average each battery core is calculated in the average detected temperature of last moment, wherein part battery core test point should be at least 2.
In step 302, according to the average detected temperature, the detection temperature of the coolant liquid water inlet last moment,
The cooling fluid pump revolving speed and the coolant liquid water valve aperture obtain institute in the battery pack in the battery pack thermal model
There is total heat exchange amount between battery core and the coolant liquid.The heat exchange capacity refers to the electricity described in battery pack within the unit time
Total heat exchange amount between core and coolant liquid.Total heat exchange amount can pass through in battery pack thermal model according to above-mentioned information
Obtained by tabling look-up, it can also be obtained according to above-mentioned information by the calculation formula in battery pack thermal model.Coolant liquid enters water
The detection temperature of the test point before the detection temperature of mouth last moment is a unit time.
In step 303, according to total heat exchange amount, the detection temperature of the coolant liquid water inlet last moment, institute
It states coolant liquid thermal capacitance and unit time step-length and obtains the coolant liquid water outlet current time in the battery pack thermal model
Estimated temperature, wherein the coolant liquid thermal capacitance and the unit time step-length are the preset parameters in the battery pack thermal model.
The unit time step-length of definition and the description in embodiment as shown in Figure 2 of unit time step-length defines identical.
The estimated temperature at the coolant liquid water outlet current time can pass through according to above-mentioned information in battery pack thermal model
In table look-up gained, can also be obtained according to above-mentioned information by the calculation formula in battery pack thermal model, for example, can be with
It is calculated according to formula (3), wherein TIt is cold _ to go out 1Indicate the estimated temperature at coolant liquid water outlet test point current time, TIt is cold _ to enter 0Table
Show the detection temperature of coolant liquid water inlet test point last moment, PAlways _ battery core/coolant liquidFor all battery cores in battery pack in the unit time with
Total heat exchange amount between coolant liquid, CCoolant liquidIt is coolant liquid thermal capacitance, d is unit time step-length.
TIt is cold _ to go out 1=TIt is cold _ to enter 0+∑PAlways _ battery core/coolant liquid/CCoolant liquid×d (3)
In the Current Temperatures of the step 301 according to shown in Fig. 3 to step 303 estimation coolant liquid water outlet test point,
The information for including in related status information in battery pack can be obtained by the corresponding sensor of the information, can also be indirect
It is obtained from management system corresponding in battery pack, such as battery pack thermal management system etc..
Through the above technical solutions, can according to related status information in battery pack based on battery pack thermal model come to cooling
The temperature detecting point of liquid water outlet carries out the estimation of temperature, so as to according to the detection temperature of the temperature and current time estimated
Degree compares whether extremely judge the temperature of the test point, so that whether failure and where judge to battery pack.
Fig. 4 is to obtain coolant liquid in a kind of battery failure detection method according to disclosure another exemplary embodiment to enter
The flow chart of mouth of a river estimated temperature.Related status information includes: the mode that the coolant liquid carries out heat exchange in the battery pack.
As shown in figure 4, the method comprising the steps of 401 to step 404.
In step 401, judge that coolant liquid carries out the mode of heat exchange.When the mode that the coolant liquid carries out heat exchange is
When by radiator and external progress heat exchange, step 402 is gone to；When the mode that the coolant liquid carries out heat exchange is to pass through heat
When exchanger and refrigerant carry out heat exchange, step 403 is gone to；When the mode that the coolant liquid carries out heat exchange is added by electricity
Thermal when carrying out heat exchange, goes to step 404.
In step 402, related status information in the battery pack further include: cooling fluid pump revolving speed, coolant liquid water valve
Aperture, rotation speed of the fan, current environmental temperature, the detection temperature of coolant liquid water outlet last moment；And according to the coolant liquid water
Revolution speed, the coolant liquid water valve aperture, the rotation speed of the fan, the current environmental temperature, one on the coolant liquid water outlet
Pipeline thermal losses in the detection temperature at moment, the battery pack thermal management system obtains described in the battery pack thermal model
The estimated temperature at coolant liquid water inlet current time.
In step 403, related status information in the battery pack further include: cooling fluid pump revolving speed, coolant liquid water valve
Aperture, the detection temperature of coolant liquid water outlet last moment, temperature difference, the refrigeration of last moment refrigerant water outlet and water inlet
Agent pump rotary speed, refrigerant water valve aperture；And according to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, described cold
But the detection temperature of liquid water outlet last moment, the temperature difference of the last moment refrigerant water outlet and water inlet, the system
Refrigerant pump revolving speed, the refrigerant water valve aperture, the pipeline thermal losses in the battery pack thermal management system are in the battery
The estimated temperature at the coolant liquid water inlet current time is obtained in group thermal model.
In step 404, related status information in the battery pack further include: cooling fluid pump revolving speed, coolant liquid water valve
Aperture, the detection temperature of coolant liquid water outlet last moment, the electric heater unit power；And according to the cooling fluid pump
Revolving speed, the coolant liquid water valve aperture, the detection temperature of the coolant liquid water outlet last moment, the electric heater unit function
Pipeline thermal losses in rate, the battery pack thermal management system obtains the coolant liquid water inlet in the battery pack thermal model
The estimated temperature at current time.
Wherein, pipeline thermal losses of the above-mentioned steps 402 into the battery pack thermal management system in step 404 is the battery
Preset parameter in group thermal model.The estimated temperature at the coolant liquid water inlet current time in step 402 to step 404 can be with
Respectively according to above-mentioned information as obtained by tabling look-up in battery pack thermal model, can also respectively according to above-mentioned information by
Calculation formula in battery pack thermal model obtains.
The mode and the battery intra class correlation in step 402 to step 404 that coolant liquid in step 401 carries out heat exchange
The information for including in status information can be obtained by the corresponding sensor of the information, can also the phase from battery pack indirectly
It is obtained in the management system answered, such as battery pack thermal management system etc..
Through the above technical solutions, can according to related status information in battery pack based on battery pack thermal model come to cooling
The temperature detecting point of liquid water inlet carries out the estimation of temperature, so as to according to the detection temperature of the temperature and current time estimated
Degree compares whether extremely judge the temperature of the test point, so that whether failure and where judge to battery pack.
Fig. 5 is the schematic block diagram according to a kind of battery failure detection device of one exemplary embodiment of the disclosure.Such as Fig. 5
Shown, described device includes: to obtain module 10, for obtaining in battery pack test point in related status information and the battery pack
The detection temperature at current time；Temperature estimation module 20 is obtained for being based on battery pack thermal model according to the related status information
Take the estimated temperature of the test point；Abnormal judgment module 30, for the inspection according to the estimated temperature and the current time
Testing temperature judges whether the test point exception occurs；Breakdown judge module 40, for being judged according to the test point for exception occur
The failure of the battery pack.
In a kind of possible embodiment, the test point includes: multiple battery core test points, coolant liquid water outlet and cold
But liquid water inlet.
Fig. 6 is temperature estimation block in a kind of battery failure detection device according to disclosure another exemplary embodiment
20 schematic block diagram.
In a kind of possible embodiment, as shown in fig. 6, related status information includes: coolant liquid in the battery pack
Pump rotary speed, coolant liquid water valve aperture, the remaining capacity of the battery pack, the health degree of the battery pack, the battery pack
Detection temperature, the coolant liquid of any one battery core test point last moment in input and output electric current, the multiple battery core test point
The detection temperature of water inlet last moment；The temperature estimation module 20 includes:
Submodule 201 is estimated in battery core internal resistance, for according to the remaining capacity of the battery pack and the health of the battery pack
Degree obtains the fever internal resistance of average each battery core in the battery pack in the battery pack thermal model；
Submodule 202 is estimated in battery core calorific value, for according to the fever internal resistance and the input and output of battery pack electricity
Stream obtains the calorific value of averagely each battery core in the battery pack thermal model；
Battery core heat exchange amount estimates submodule 203, for the detection temperature according to the battery core test point last moment, institute
Detection temperature, the cooling fluid pump revolving speed and the coolant liquid water valve aperture of coolant liquid water inlet last moment are stated described
The heat exchange amount between the battery core and the coolant liquid where the battery core test point is obtained in battery pack thermal model；
Battery core test point temperature estimation submodule 204, for according to the detection temperature of the battery core test point last moment,
Calorific value, the heat exchange amount and the battery pack thermal capacitance and unit time step-length of average each battery core are in the battery pack
The estimated temperature at the battery core test point current time is obtained in thermal model, wherein when the battery pack thermal capacitance and the unit
Between step-length be preset parameter in the battery pack thermal model.
In a kind of possible embodiment, as shown in fig. 6, related status information includes: coolant liquid in the battery pack
Pump rotary speed, coolant liquid water valve aperture, in the multiple battery core test point each battery core test point last moment detection temperature
Degree, the detection temperature of coolant liquid water inlet last moment；The temperature estimation module 20 can also include:
Battery core mean temperature estimates submodule 205, for the detection according to each battery core test point last moment
Temperature obtains each battery core in the average detected temperature of last moment in the battery pack thermal model；
The total heat exchange amount of battery core estimates submodule 206, for according to the average detected temperature, the coolant liquid water inlet
The detection temperature of last moment, the cooling fluid pump revolving speed and the coolant liquid water valve aperture are in the battery pack thermal model
Obtain total heat exchange amount in the battery pack between all battery cores and the coolant liquid；
Coolant liquid outlet temperature estimates submodule 207, for according to total heat exchange amount, the coolant liquid water inlet
The detection temperature of last moment, the coolant liquid thermal capacitance and unit time step-length obtain described cold in the battery pack thermal model
But the estimated temperature at liquid water outlet current time, wherein the coolant liquid thermal capacitance and the unit time step-length are the batteries
Preset parameter in group thermal model.
In a kind of possible embodiment, as shown in fig. 6, related status information includes: described cold in the battery pack
But liquid carries out the mode of heat exchange.
When the mode that the coolant liquid carries out heat exchange is by radiator and external progress heat exchange, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, rotation speed of the fan, current environmental temperature, cooling
The detection temperature of liquid water outlet last moment；The temperature estimation module can also include: coolant liquid water inlet temperature estimation
Module 208, for according to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the rotation speed of the fan, described work as front ring
Border temperature, the detection temperature of the coolant liquid water outlet last moment, the pipeline thermal losses in the battery pack thermal management system
The estimated temperature at the coolant liquid water inlet current time is obtained in the battery pack thermal model, wherein the battery pack heat
Pipeline thermal losses in management system is the preset parameter in the battery pack thermal model.
When the mode that the coolant liquid carries out heat exchange is to carry out heat exchange by heat exchanger and refrigerant, the electricity
Pond intra class correlation status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, coolant liquid water outlet last moment
Detect temperature, temperature difference, refrigerant pump rotary speed, the refrigerant water valve aperture of last moment refrigerant water outlet and water inlet；
The coolant liquid water inlet temperature estimation submodule 208 can be also used for according to the cooling fluid pump revolving speed, the coolant liquid
Water valve aperture, the detection temperature of the coolant liquid water outlet last moment, the last moment refrigerant water outlet and water inlet
Temperature difference, the refrigerant pump rotary speed, the refrigerant water valve aperture, the pipeline heat in the battery pack thermal management system
Loss obtains the estimated temperature at the coolant liquid water inlet current time in the battery pack thermal model, wherein the battery
Pipeline thermal losses in group heat management system is the preset parameter in the battery pack thermal model.
When the coolant liquid carry out heat exchange mode be by electric heater unit to carry out heat exchange when, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, the detection of coolant liquid water outlet last moment
The power of temperature, the electric heater unit；The coolant liquid water inlet temperature estimation submodule 208 can be also used for according to
Cooling fluid pump revolving speed, the coolant liquid water valve aperture, the detection temperature of the coolant liquid water outlet last moment, the electricity add
Pipeline thermal losses in the power of thermal, the battery pack thermal management system obtains described cold in the battery pack thermal model
But the estimated temperature at liquid water inlet current time, wherein the pipeline thermal losses in the battery pack thermal management system is the electricity
Preset parameter in the group thermal model of pond.
In a kind of possible embodiment, the exception judgment module 30 is also used to:
When the estimated temperature and the actual measurement temperature deviation are greater than preset threshold, and the estimated temperature with it is described
When the duration that actual measurement temperature deviation is greater than preset threshold is greater than preset duration, it is abnormal to determine that the test point occurs.
In a kind of possible embodiment, the breakdown judge module 40 is also used to:
When occurring abnormal test point number in the multiple battery core test point less than predetermined number, detection occurs abnormal
Battery core test point voltage it is whether abnormal, if the voltage for abnormal battery core test point occur is also abnormal, determine described in
Battery core failure where battery core test point determines the battery core inspection if the voltage for abnormal battery core test point occur is normal
The temperature sensor fault of measuring point；
When occur in multiple battery core test points of any one coolant pipe road abnormal test point number be greater than it is default
When ratio, the coolant line failure is determined；
When there is any one or the more persons in following state, the battery pack overall thermal management system failure is determined:
Occurs abnormal test point number in the multiple battery core test point more than or equal to the predetermined number；
The coolant liquid water outlet test point is abnormal；And
The coolant liquid water inlet test point is abnormal.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, no detailed explanation will be given here.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.It is further to note that in above-mentioned specific embodiment
Described in each particular technique feature can be combined in any appropriate way in the case of no contradiction.For
Avoid unnecessary repetition, no further explanation will be given to various combinations of possible ways for the disclosure.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (10)
1. a kind of battery failure detection method, which is characterized in that the described method includes:
Obtain the detection temperature at test point current time in related status information and the battery pack in battery pack；
The estimated temperature of the test point is obtained based on battery pack thermal model according to the related status information；
Judge whether the test point exception occurs according to the detection temperature at the estimated temperature and the current time；
The failure for judging the battery pack according to there is abnormal test point.
2. the method according to claim 1, wherein the test point includes:
Multiple battery core test points, coolant liquid water outlet and coolant liquid water inlet.
3. according to the method described in claim 2, it is characterized in that, related status information includes: coolant liquid in the battery pack
Pump rotary speed, coolant liquid water valve aperture, the remaining capacity of the battery pack, the health degree of the battery pack, the battery pack
Detection temperature, the coolant liquid of any one battery core test point last moment in input and output electric current, the multiple battery core test point
The detection temperature of water inlet last moment；
The estimated temperature for obtaining test point in the battery pack based on battery pack thermal model according to the related status information
Include:
It is obtained in the battery pack thermal model according to the remaining capacity of the battery pack and the health degree of the battery pack described
The fever internal resistance of average each battery core in battery pack；
It is obtained in the battery pack thermal model according to the input and output electric current of the fever internal resistance and the battery pack averagely every
The calorific value of a battery core；
According to the detection temperature of the battery core test point last moment, the detection temperature of the coolant liquid water inlet last moment,
The cooling fluid pump revolving speed and the coolant liquid water valve aperture obtain the battery core test point in the battery pack thermal model
Heat exchange amount between the battery core at place and the coolant liquid；
According to calorific value, the heat exchange of the detection temperature of the battery core test point last moment, average each battery core
Amount and battery pack thermal capacitance and unit time step-length obtain the battery core test point current time in the battery pack thermal model
Estimated temperature, wherein the battery pack thermal capacitance and the unit time step-length are the fixed ginsengs in the battery pack thermal model
Number.
4. according to the method described in claim 2, it is characterized in that, related status information includes: coolant liquid in the battery pack
Pump rotary speed, coolant liquid water valve aperture, in the multiple battery core test point each battery core test point last moment detection temperature
Degree, the detection temperature of coolant liquid water inlet last moment；
The estimated temperature for obtaining test point in the battery pack based on battery pack thermal model according to the related status information
Include:
Each is obtained in the battery pack thermal model according to the detection temperature of each battery core test point last moment
Average detected temperature of the battery core in last moment；
Turned according to the average detected temperature, the detection temperature of the coolant liquid water inlet last moment, the cooling fluid pump
The fast and described coolant liquid water valve aperture obtains all battery cores and the cooling in the battery pack in the battery pack thermal model
Total heat exchange amount between liquid；
According to total heat exchange amount, the detection temperature of the coolant liquid water inlet last moment, the coolant liquid thermal capacitance and list
Position time step obtains the estimated temperature at the coolant liquid water outlet current time in the battery pack thermal model, wherein institute
It states coolant liquid thermal capacitance and the unit time step-length is the preset parameter in the battery pack thermal model.
5. according to the method described in claim 2, it is characterized in that, related status information includes: described cold in the battery pack
But liquid carries out the mode of heat exchange；
When the mode that the coolant liquid carries out heat exchange is by radiator and external progress heat exchange, phase in the battery pack
Off status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, rotation speed of the fan, current environmental temperature, coolant liquid go out
The detection temperature of mouth of a river last moment；
The estimated temperature for exporting test point in the battery pack based on battery pack thermal model according to the related status information
Include:
According to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the rotation speed of the fan, the current environmental temperature,
Pipeline thermal losses in the detection temperature of the coolant liquid water outlet last moment, the battery pack thermal management system is in the electricity
The estimated temperature at the coolant liquid water inlet current time is obtained in the group thermal model of pond, wherein the battery pack thermal management system
In pipeline thermal losses be preset parameter in the battery pack thermal model.
6. according to the method described in claim 2, it is characterized in that, related status information includes: described cold in the battery pack
But liquid carries out the mode of heat exchange；
When the mode that the coolant liquid carries out heat exchange is to carry out heat exchange by heat exchanger and refrigerant, the battery pack
Interior related status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, the detection of coolant liquid water outlet last moment
Temperature, the temperature difference of last moment refrigerant water outlet and water inlet, refrigerant pump rotary speed, refrigerant water valve aperture；
The estimated temperature for exporting test point in the battery pack based on battery pack thermal model according to the related status information
Include:
According to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the detection of the coolant liquid water outlet last moment
Temperature, the temperature difference of the last moment refrigerant water outlet and water inlet, the refrigerant pump rotary speed, the refrigerant water
Pipeline thermal losses in valve opening, the battery pack thermal management system obtains the coolant liquid in the battery pack thermal model and enters
The estimated temperature at mouth of a river current time, wherein the pipeline thermal losses in the battery pack thermal management system is the battery pack heat
Preset parameter in model.
7. according to the method described in claim 2, it is characterized in that, related status information includes: described cold in the battery pack
But liquid carries out the mode of heat exchange；
When the mode that the coolant liquid carries out heat exchange be by electric heater unit to carry out heat exchange when, phase in the battery pack
Off status information further include: cooling fluid pump revolving speed, coolant liquid water valve aperture, the detection temperature of coolant liquid water outlet last moment
The power of degree, the electric heater unit；
The estimated temperature for exporting test point in the battery pack based on battery pack thermal model according to the related status information
Include:
According to the cooling fluid pump revolving speed, the coolant liquid water valve aperture, the detection of the coolant liquid water outlet last moment
Temperature, the power of the electric heater unit, the pipeline thermal losses in the battery pack thermal management system are in the battery pack hot-die
The estimated temperature at the coolant liquid water inlet current time is obtained in type, wherein the pipeline in the battery pack thermal management system
Thermal losses is the preset parameter in the battery pack thermal model.
8. claim according to claim 1, which is characterized in that it is described according to the estimated temperature and it is described current when
The detection temperature at quarter judges whether the test point exception occurs and include:
When the detection temperature deviation at the estimated temperature and the current time is greater than preset threshold, and the estimated temperature and institute
When detecting duration of the temperature deviation greater than preset threshold greater than preset duration of current time is stated, determines that the detection is pointed out
It is now abnormal.
9. claim according to claim 1, which is characterized in that described according to the test point for exception occur judgement
The failure of battery pack includes:
When occurring abnormal test point number in the multiple battery core test point less than predetermined number, there is abnormal electricity in detection
Whether the voltage of core test point is abnormal, if the voltage for abnormal battery core test point occur is also abnormal, determines the battery core inspection
Battery core failure where measuring point determines the battery core test point if the voltage for abnormal battery core test point occur is normal
Temperature sensor fault；
It is greater than preset ratio when occurring abnormal test point number in multiple battery core test points of any one coolant pipe road
When, determine the coolant line failure；
When there is any one or the more persons in following state, the battery pack overall thermal management system failure is determined:
Occurs abnormal test point number in the multiple battery core test point more than or equal to the predetermined number；
The coolant liquid water outlet test point is abnormal；And
The coolant liquid water inlet test point is abnormal.
10. a kind of battery failure detection device, which is characterized in that described device includes:
Module is obtained, for obtaining the detection temperature at test point current time in related status information and the battery pack in battery pack
Degree；
Temperature estimation module, for obtaining the estimation of the test point based on battery pack thermal model according to the related status information
Temperature；
Abnormal judgment module, for judging that the test point is according to the detection temperature of the estimated temperature and the current time
No appearance is abnormal；
Breakdown judge module, the failure for judging the battery pack according to there is abnormal test point.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111823952A (en) * | 2020-04-17 | 2020-10-27 | 北京嘀嘀无限科技发展有限公司 | Battery cell temperature diagnosis method, storage medium and electronic equipment |
| CN112068004A (en) * | 2020-09-16 | 2020-12-11 | 北京嘀嘀无限科技发展有限公司 | Method and device for determining battery abnormity and battery charging remaining time |
| CN112838295A (en) * | 2020-12-30 | 2021-05-25 | 广州橙行智动汽车科技有限公司 | Battery heating system detection method and device, vehicle and storage medium |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987508A (en) * | 2006-12-26 | 2007-06-27 | 天津力神电池股份有限公司 | Predicting method for lithiumion cell heat safety performance |
| CN101765940A (en) * | 2007-07-26 | 2010-06-30 | 松下电器产业株式会社 | Cell internal shortcircuit detection device, method, battery pack, and electronic device system |
| US20100315037A1 (en) * | 2009-06-03 | 2010-12-16 | Freescale Semiconductor, Inc. | Resistor testing circuit and battery charger including resistor testing circuit |
| CN102331719A (en) * | 2011-07-11 | 2012-01-25 | 联合汽车电子有限公司 | Method for controlling dynamic derating of hybrid electric vehicle based on thermal model |
| CN104656026A (en) * | 2014-11-13 | 2015-05-27 | 浙江吉利罗佑发动机有限公司 | Diagnostic method and system for overcharge of battery of hybrid electric vehicle |
| CN104733789A (en) * | 2013-12-18 | 2015-06-24 | 北汽福田汽车股份有限公司 | Estimation method for lithium ion battery internal temperature |
| CN105424221A (en) * | 2014-09-17 | 2016-03-23 | 通用汽车环球科技运作有限责任公司 | Systems and methods for estimating temperature of battery system |
| CN105548891A (en) * | 2015-12-02 | 2016-05-04 | 北京长城华冠汽车科技股份有限公司 | Battery heat test device and battery heat test method |
| CN106597299A (en) * | 2016-11-22 | 2017-04-26 | 南京能启能电子科技有限公司 | Lithium battery thermal runaway early warning and automatic control method |
-
2017
- 2017-12-28 CN CN201711466136.1A patent/CN109975711A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987508A (en) * | 2006-12-26 | 2007-06-27 | 天津力神电池股份有限公司 | Predicting method for lithiumion cell heat safety performance |
| CN101765940A (en) * | 2007-07-26 | 2010-06-30 | 松下电器产业株式会社 | Cell internal shortcircuit detection device, method, battery pack, and electronic device system |
| US20100315037A1 (en) * | 2009-06-03 | 2010-12-16 | Freescale Semiconductor, Inc. | Resistor testing circuit and battery charger including resistor testing circuit |
| CN102331719A (en) * | 2011-07-11 | 2012-01-25 | 联合汽车电子有限公司 | Method for controlling dynamic derating of hybrid electric vehicle based on thermal model |
| CN104733789A (en) * | 2013-12-18 | 2015-06-24 | 北汽福田汽车股份有限公司 | Estimation method for lithium ion battery internal temperature |
| CN105424221A (en) * | 2014-09-17 | 2016-03-23 | 通用汽车环球科技运作有限责任公司 | Systems and methods for estimating temperature of battery system |
| CN104656026A (en) * | 2014-11-13 | 2015-05-27 | 浙江吉利罗佑发动机有限公司 | Diagnostic method and system for overcharge of battery of hybrid electric vehicle |
| CN105548891A (en) * | 2015-12-02 | 2016-05-04 | 北京长城华冠汽车科技股份有限公司 | Battery heat test device and battery heat test method |
| CN106597299A (en) * | 2016-11-22 | 2017-04-26 | 南京能启能电子科技有限公司 | Lithium battery thermal runaway early warning and automatic control method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111823952A (en) * | 2020-04-17 | 2020-10-27 | 北京嘀嘀无限科技发展有限公司 | Battery cell temperature diagnosis method, storage medium and electronic equipment |
| CN111823952B (en) * | 2020-04-17 | 2022-07-05 | 北京嘀嘀无限科技发展有限公司 | Battery cell temperature diagnosis method, storage medium and electronic equipment |
| CN113745672A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Battery self-heating control method, battery self-heating device, system and vehicle |
| CN113835031A (en) * | 2020-06-04 | 2021-12-24 | 蜂巢能源科技有限公司 | Information processing method, device, electronic equipment and storage medium |
| CN113835031B (en) * | 2020-06-04 | 2023-07-07 | 蜂巢能源科技股份有限公司 | Information processing method, apparatus, electronic device and storage medium |
| CN113917342A (en) * | 2020-07-08 | 2022-01-11 | 大众汽车股份公司 | Method for detecting thermal runaway and motor vehicle |
| CN112068004A (en) * | 2020-09-16 | 2020-12-11 | 北京嘀嘀无限科技发展有限公司 | Method and device for determining battery abnormity and battery charging remaining time |
| CN112838295A (en) * | 2020-12-30 | 2021-05-25 | 广州橙行智动汽车科技有限公司 | Battery heating system detection method and device, vehicle and storage medium |
| CN112901548A (en) * | 2021-05-10 | 2021-06-04 | 北京中航电科科技有限公司 | Temperature estimation method and device for fan rotating speed control |
| CN115219939A (en) * | 2022-09-15 | 2022-10-21 | 小米汽车科技有限公司 | Battery temperature prediction method, device, vehicle and storage medium |
| CN115931155A (en) * | 2022-11-28 | 2023-04-07 | 浙江凌骁能源科技有限公司 | Battery temperature rise fault diagnosis method and device, computer equipment and storage medium |
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