CN110058181A - A kind of method and system that the performance for non-disconnectable battery modules is diagnosed - Google Patents
A kind of method and system that the performance for non-disconnectable battery modules is diagnosed Download PDFInfo
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- CN110058181A CN110058181A CN201910430094.9A CN201910430094A CN110058181A CN 110058181 A CN110058181 A CN 110058181A CN 201910430094 A CN201910430094 A CN 201910430094A CN 110058181 A CN110058181 A CN 110058181A
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- Prior art keywords
- battery modules
- follow
- battery
- open
- internal resistance
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- 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
The present invention relates to a kind of method and system that the performance for non-disconnectable battery modules is diagnosed, comprising: judges whether the disconnected battery modules of follow-up are non-disconnectable battery modules according to the burst mode of battery modules；Follow-up breaks battery modules as non-disconnectable battery modules, when being determined to directly detect the open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up, the open-circuit voltage and AC internal Resistance of the single battery in the disconnected battery modules of the follow-up are detected；The follow-up that will acquire break the single battery in battery modules open-circuit voltage and AC internal Resistance respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, broken the performance of battery modules with the determination follow-up.Can the present invention detect the voltage of single battery and internal resistance in mould group to further discriminating between by non-disconnectable electrolytic cell mould group, and take different technology paths to carry out the judgement of battery performance different types of mould group, improve the diagnosis efficiency for moving back fortune battery scene.
Description
Technical field
The present invention relates to moving back the echelon of fortune battery using technical field, and more particularly, to one kind for can not
Tear the method and system that the performance of battery modules is diagnosed open.
Background technique
Power battery is on electric car in use, being used in a manner of mould group.Therefore, when it is from electric car
When moving back fortune, and fortune is moved back in a manner of battery modules.Since the burst mode of use is different, the Discerptibility of these mould groups is not yet
It together, should be using difference when carrying out battery and moving back the quick diagnosis at fortune scene to cause subsequent for different battery modules
Technology path carry out the judgement of battery status.
Therefore, it is necessary to a kind of methods that the performance to non-disconnectable battery modules is diagnosed, and move back the non-disconnectable of fortune with determination
Can battery modules carry out echelon utilization.
Summary of the invention
The present invention proposes a kind of method and system that the performance for non-disconnectable battery modules is diagnosed, to solve such as
What diagnoses the performance for the non-disconnectable battery modules for moving back fortune scene, to determine whether the problem of carrying out echelon utilization.
To solve the above-mentioned problems, according to an aspect of the invention, there is provided it is a kind of for non-disconnectable battery modules
The method that is diagnosed of performance, which is characterized in that the described method includes:
Judge whether the disconnected battery modules of follow-up are non-disconnectable battery modules according to the burst mode of battery modules；
Follow-up battery modules of breaking are non-disconnectable battery modules, when being determined to directly to detect the follow-up power-off pond mould
In group when the open-circuit voltage and AC internal Resistance of single battery, to the open-circuit voltage of the single battery in the disconnected battery modules of the follow-up
It is detected with AC internal Resistance；
The open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up that will acquire are examined with preset respectively
Open-circuit voltage and AC internal Resistance in disconnected strategy are compared, with the performance of the disconnected battery modules of the determination follow-up.
Preferably, wherein the burst mode according to battery modules judges whether the disconnected battery modules of follow-up are non-disconnectable electricity
Chi Mo group, comprising:
The connection type between elevator battery cell if the follow-up breaks in battery modules is laser welding or ultrasonic bond
It connects, it is determined that the follow-up breaks battery modules as non-disconnectable battery modules；
If the follow-up break battery modules in battery cell between connection type be bolted, it is determined that it is described to
Diagnosis battery modules are removable battery modules.
Preferably, the open-circuit voltage and AC internal Resistance of the single battery wherein the follow-up that will acquire breaks in battery modules
Respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, broken battery modules with the determination follow-up
Performance, comprising:
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the first preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the first preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the second preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the second preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in third preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than third predetermined threshold value multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in the 4th preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the second predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the 4th preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Then determine the single battery that the follow-up breaks in battery modules
Consistency it is good, to the follow-up break battery modules integrally carry out echelon utilization；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off
Chi Mo group.
Preferably, wherein the method also includes:
When follow-up battery modules of breaking are non-disconnectable battery modules, and follow-up power-off pond mould can not detected
In group when the open-circuit voltage and AC internal Resistance of single battery, detect the follow-up break battery modules entirety open-circuit voltage with exchange
Internal resistance；
The open-circuit voltage and AC internal Resistance of statistics retired battery modules, and calculate open-circuit voltage average value and internal resistance is average
Value；
The open-circuit voltage of the open-circuit voltage of battery modules entirety less than the 5th preset threshold multiple if the follow-up breaks
The or AC internal Resistance of average value are higher than the internal resistance average value of the 6th preset threshold multiple, it is determined that the follow-up powers off pond
The consistency of mould group is poor, eliminates the disconnected battery modules of the follow-up；Conversely, then integrally carrying out echelon to the disconnected battery modules of the follow-up
It utilizes.
Preferably, wherein the method also includes:
When follow-up battery modules of breaking are non-disconnectable battery modules, and it is not directly detected follow-up power-off pond
In mould group when the open-circuit voltage and AC internal Resistance of single battery, there is BMS communication interface in battery modules if the follow-up breaks, it will
The communications protocol that the disconnected battery modules of the follow-up are connected with BMS battery management system, and are provided using the third-party institution, obtains
The open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up.
According to another aspect of the present invention, provide what a kind of performance for non-disconnectable battery modules was diagnosed
System, which is characterized in that the system comprises:
Non-disconnectable battery modules determination unit judges that the disconnected battery modules of follow-up are for the burst mode according to battery modules
No is non-disconnectable battery modules；
The open-circuit voltage and AC internal Resistance detection unit of battery cell break battery modules for the follow-up as non-disconnectable electricity
Chi Mo group, when being determined to directly detect the open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up,
The open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up are detected；
Diagnosis unit, the open-circuit voltage and AC internal Resistance point of the single battery in the disconnected battery modules of follow-up for will acquire
Not in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, with the determination follow-up break battery modules property
Energy.
Preferably, wherein the non-disconnectable battery modules determination unit, judges follow-up according to the burst mode of battery modules
Whether disconnected battery modules are non-disconnectable battery modules, comprising:
The connection type between elevator battery cell if the follow-up breaks in battery modules is laser welding or ultrasonic bond
It connects, it is determined that the follow-up breaks battery modules as non-disconnectable battery modules；
If the follow-up break battery modules in battery cell between connection type be bolted, it is determined that it is described to
Diagnosis battery modules are removable battery modules.
Preferably, wherein the diagnosis unit, the follow-up that will acquire breaks the open-circuit voltage of the single battery in battery modules
With AC internal Resistance respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, it is described wait diagnose to determine
The performance of battery modules, comprising:
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the first preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the first preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the second preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the second preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in third preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than third predetermined threshold value multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in the 4th preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the second predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the 4th preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Then determine the single battery that the follow-up breaks in battery modules
Consistency it is good, to the follow-up break battery modules integrally carry out echelon utilization；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off
Chi Mo group.
Preferably, wherein the system also includes:
The open-circuit voltage and AC internal Resistance detection unit of battery entirety, for being non-disconnectable when the disconnected battery modules of the follow-up
Battery modules, and in it can not detect the disconnected battery modules of the follow-up when open-circuit voltage and AC internal Resistance of single battery,
Detect the open-circuit voltage and AC internal Resistance of the disconnected battery modules entirety of the follow-up；
Average calculation unit for counting the open-circuit voltage and AC internal Resistance of retired battery modules, and calculates open circuit
Average voltage and AC internal Resistance average value；
The diagnosis unit, if the open-circuit voltage for the disconnected battery modules entirety of the follow-up is less than the 5th preset threshold times
The or AC internal Resistance of several open-circuit voltage average value are higher than the internal resistance average value of the 6th preset threshold multiple, then really
The consistency of the fixed disconnected battery modules of the follow-up is poor, eliminates the disconnected battery modules of the follow-up；Conversely, then powering off pond to the follow-up
Mould group integrally carries out echelon utilization.
Preferably, wherein the system also includes:
The open-circuit voltage and AC internal Resistance detection unit of battery cell, for being non-disconnectable when the disconnected battery modules of the follow-up
Battery modules, and it is not directly detected the open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up
When, there is BMS communication interface in battery modules if the follow-up breaks, by the disconnected battery modules of the follow-up and BMS battery management system
System is connected, and the communications protocol provided using the third-party institution, obtains the single battery in the disconnected battery modules of the follow-up
Open-circuit voltage and AC internal Resistance.
The present invention provides a kind of method and system that the performance for non-disconnectable battery modules is diagnosed, comprising:
When determining the disconnected battery modules of follow-up is non-disconnectable battery modules, according to the open circuit of single battery in the disconnected battery modules of the follow-up
The open-circuit voltage and AC internal Resistance of voltage and AC internal Resistance or the disconnected battery modules entirety of the follow-up determine follow-up power-off pond
The performance of mould group, and when the follow-up break battery modules consistency preferably when, determine the follow-up break battery modules can use
It is utilized in echelon；Conversely, then eliminating the disconnected battery modules of the follow-up.The present invention is to passing through the non-disconnectable further area of electrolytic cell mould group
Can divide detect the voltage of single battery and internal resistance in mould group, and take different technology paths different types of mould group
The judgement for carrying out battery performance improves the diagnosis efficiency for moving back fortune battery scene.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is the method 100 for being diagnosed to the performance of non-disconnectable battery modules according to embodiment of the present invention
Flow chart；And
Fig. 2 is the system 200 for being diagnosed to the performance of non-disconnectable battery modules according to embodiment of the present invention
Structural schematic diagram.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is the method 100 for being diagnosed to the performance of non-disconnectable battery modules according to embodiment of the present invention
Flow chart.As shown in Figure 1, embodiments of the present invention provide for being diagnosed to the performance of non-disconnectable battery modules
Method, when determining the disconnected battery modules of follow-up is non-disconnectable battery modules, according to single battery in the disconnected battery modules of the follow-up
Open-circuit voltage and AC internal Resistance or the follow-up break the open-circuit voltage and AC internal Resistance of battery modules entirety, determine the follow-up
The performance of disconnected battery modules, and when the follow-up break battery modules consistency preferably when, determine that the follow-up breaks battery modules
It can be used in echelon utilization；Conversely, then eliminating the disconnected battery modules of the follow-up.The present invention to by non-disconnectable electrolytic cell mould group into
Can the differentiation of one step detect the voltage of single battery and internal resistance in mould group, and take different technologies to different types of mould group
Route improves the diagnosis efficiency for moving back fortune battery scene to carry out the judgement of battery performance.What embodiments of the present invention provided
The method 100 diagnosed for the performance to non-disconnectable battery modules is since step 101 place, in step 101 according to battery
The burst mode of mould group judges whether the disconnected battery modules of follow-up are non-disconnectable battery modules.
Preferably, wherein the burst mode according to battery modules judges whether the disconnected battery modules of follow-up are non-disconnectable electricity
Chi Mo group, comprising:
The connection type between elevator battery cell if the follow-up breaks in battery modules is laser welding or ultrasonic bond
It connects, it is determined that the follow-up breaks battery modules as non-disconnectable battery modules；
If the follow-up break battery modules in battery cell between connection type be bolted, it is determined that it is described to
Diagnosis battery modules are removable battery modules.
In step 102, follow-up battery modules of breaking are non-disconnectable battery modules, when be determined to directly to detect it is described to
When diagnosing the open-circuit voltage and AC internal Resistance of single battery in battery modules, to the single battery in the disconnected battery modules of the follow-up
Open-circuit voltage and AC internal Resistance detected.
Preferably, wherein the method also includes:
When follow-up battery modules of breaking are non-disconnectable battery modules, and it is not directly detected follow-up power-off pond
In mould group when the open-circuit voltage and AC internal Resistance of single battery, there is BMS communication interface in battery modules if the follow-up breaks, it will
The communications protocol that the disconnected battery modules of the follow-up are connected with BMS battery management system, and are provided using the third-party institution, obtains
The open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up.
In embodiments of the present invention, obtain follow-up break battery modules in single battery open-circuit voltage with exchange in
The mode of resistance includes: the mode that directly acquires and indirect gain mode.Directly acquiring mode is to directly acquire the disconnected battery modules of follow-up
In single battery open-circuit voltage and AC internal Resistance.Indirect gain mode is to have BMS logical in the disconnected battery modules of the follow-up
When communication interface, the disconnected battery modules of the follow-up are connected with BMS battery management system, and is led to using what the third-party institution provided
Agreement is interrogated, the open-circuit voltage and AC internal Resistance of the single battery in the disconnected battery modules of the follow-up are obtained.
That is, being also unable to test single battery but there are the mould group of BMS communication interface for that can not disassemble, can detect
The voltage of only entire mould group and internal resistance, can not detect voltage and the internal resistance of single battery.But since there are BMS communications for mould group
Interface can power off mould group in pond to follow-up and configure upper BMS battery management system, and producer is allowed to provide communications protocol, it will be able to read
Get the voltage of battery cell in mould group.Again by charging to mould group, each battery cell in mesuring battary mould group can be calculated
DC internal resistance, the battery modules consistency so that it is determined that follow-up breaks, and judge that the disconnected battery modules of follow-up whether may be used on this basis
Echelon utilization is carried out with whole group.
In step 103, the open-circuit voltage and AC internal Resistance difference of the single battery in the disconnected battery modules of the follow-up that will acquire
With in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, with the determination follow-up break battery modules property
Energy.
Preferably, the open-circuit voltage and AC internal Resistance of the single battery wherein the follow-up that will acquire breaks in battery modules
Respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, broken battery modules with the determination follow-up
Performance, comprising:
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the first preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the first preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the second preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the second preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in third preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than third predetermined threshold value multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in the 4th preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the second predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the 4th preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Then determine the single battery that the follow-up breaks in battery modules
Consistency it is good, to the follow-up break battery modules integrally carry out echelon utilization；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off
Chi Mo group.
Preferably, wherein the method also includes:
When follow-up battery modules of breaking are non-disconnectable battery modules, and follow-up power-off pond mould can not detected
In group when the open-circuit voltage and AC internal Resistance of single battery, detect the follow-up break battery modules entirety open-circuit voltage with exchange
Internal resistance；
The open-circuit voltage and AC internal Resistance of statistics retired battery modules, and calculate open-circuit voltage average value and internal resistance is average
Value；
The open-circuit voltage of the open-circuit voltage of battery modules entirety less than the 5th preset threshold multiple if the follow-up breaks
The or AC internal Resistance of average value are higher than the internal resistance average value of the 6th preset threshold multiple, it is determined that the follow-up powers off pond
The consistency of mould group is poor, eliminates the disconnected battery modules of the follow-up；Conversely, then integrally carrying out echelon to the disconnected battery modules of the follow-up
It utilizes.
In embodiments of the present invention, the first preset range of setting is [2.8V, 3.1V], and the second preset range of setting is
[3.1V, 3.5V], setting third preset range are [3.0V, 3.6V], and the 4th preset range of setting is [3.6V, 4.15V], setting
First preset threshold is 30%, and the second preset threshold of setting is 25%, and setting third predetermined threshold value is 40%, and setting the 4th is default
Threshold value is 30%, and the first predetermined voltage threshold of setting is 100mV, and the second predetermined voltage threshold is 80mV, and the 5th default threshold is arranged
Value is 20%, and the 6th preset threshold of setting is 20%.
Above-mentioned numerical value can be defined according to the actual situation, it is not limited to the number being previously mentioned in embodiment of the present invention
Value.
In embodiments of the present invention, when the follow-up breaks battery modules as ferric phosphate lithium cell, open-circuit voltage exists
When in [2.8V, 3.1V] range, if meeting, open-circuit voltage that the follow-up breaks in battery modules between single battery is very poor to be less than
AC internal Resistance of the single battery that 100mV and the follow-up break in battery modules at 1000Hz be very poor be less than it is described wait diagnose
The 30% of the average value of the AC internal Resistance of single battery in battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in [3.1V, 3.5V] range, if full
The open-circuit voltage that the foot follow-up breaks in battery modules between single battery is very poor to be less than 100mV and the follow-up powers off pond mould
Single battery in group is in the very poor friendship less than the single battery in the disconnected battery modules of the follow-up of the AC internal Resistance under 1000Hz
Flow the 25% of the average value of internal resistance；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in [3.0V, 3.6V] range, if meeting institute
The open-circuit voltage stated in the disconnected battery modules of follow-up between single battery is very poor less than in 100mV and the disconnected battery modules of the follow-up
Single battery the AC internal Resistance under 1000Hz it is very poor less than the follow-up break battery modules in single battery exchange in
The 40% of the average value of resistance；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in [3.6V, 4.15V] range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery is very poor to be less than 80mV and the follow-up breaks battery modules
Exchange of the interior single battery in the very poor single battery to break in battery modules less than the follow-up of the AC internal Resistance under 1000Hz
The 30% of the average value of internal resistance；Then determine that the consistency for the single battery that the follow-up breaks in battery modules is good, to the follow-up
Disconnected battery modules integrally carry out echelon utilization；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off
Chi Mo group.
In embodiments of the present invention, for that can not disassemble also without the monomer electricity detected in battery modules of trying to follow-up to break
When the open-circuit voltage and AC internal Resistance in pond, the open-circuit voltage and AC internal Resistance of whole group battery are only measured, then statistics moves back fortune scene
The open-circuit voltage and AC internal Resistance of all battery modules calculate open-circuit voltage average value and AC internal Resistance average value；Then for
Those open-circuit voltages too low (lower than the 20% of open-circuit voltage average value) or AC internal Resistance are excessively high (higher than AC internal Resistance average value
20%) battery modules are eliminated.But this method is due to that can not detect in battery modules the open-circuit voltage of single battery and interior
Resistance, cannot accurately hold the state of single battery, carry out echelon utilization in this case, there are biggish risks.
But such mould group is more rare in a practical situation because power battery on electric car in use,
It needs to be acquired the data such as the voltage of battery cell, temperature in mould group, therefore most of can all communicate there are BMS of mould group connects
Mouthful, the value that automobile user is removed recycling is not high.Therefore, the batteries of electric automobile for moving back fortune for that can not disassemble
Mould group, usually all there are communication interfaces.Therefore, can by detect single battery open-circuit voltage and AC internal Resistance come determine to
Can diagnosis battery modules carry out echelon utilization.
Fig. 2 is the system 200 for being diagnosed to the performance of non-disconnectable battery modules according to embodiment of the present invention
Structural schematic diagram.As shown in Fig. 2, embodiments of the present invention offer is used to examine the performance of non-disconnectable battery modules
Disconnected system 200, comprising: non-disconnectable battery modules determination unit 201, the open-circuit voltage of battery cell and AC internal Resistance detection are single
Member 202 and diagnosis unit 203.
Preferably, the non-disconnectable battery modules determination unit 201, for the burst mode according to battery modules judge to
Diagnose whether battery modules are non-disconnectable battery modules.
Preferably, wherein the non-disconnectable battery modules determination unit 201, according to the burst mode of battery modules judge to
Diagnose battery modules whether be non-disconnectable battery modules, comprising: if the follow-up break battery modules in elevator battery cell it
Between connection type be laser welding or ultrasonic welding, it is determined that the follow-up break battery modules be non-disconnectable battery modules；If
The connection type between battery cell in the disconnected battery modules of the follow-up is to be bolted, it is determined that the follow-up powers off pond mould
Group is removable battery modules.
Preferably, the open-circuit voltage of the battery cell and AC internal Resistance detection unit 202 power off pond for the follow-up
Mould group is non-disconnectable battery modules, is broken the open-circuit voltage of single battery in battery modules when being determined to directly to detect the follow-up
When with AC internal Resistance, the open-circuit voltage and AC internal Resistance of the single battery in the disconnected battery modules of the follow-up are detected.
Preferably, the diagnosis unit 203, the open circuit electricity of the single battery in the disconnected battery modules of follow-up for will acquire
Pressure and AC internal Resistance respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, with the determination follow-up
The performance of disconnected battery modules.
Preferably, wherein the diagnosis unit 203, the follow-up that will acquire breaks the open circuit electricity of the single battery in battery modules
Pressure and AC internal Resistance respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, with the determination follow-up
The performance of disconnected battery modules, comprising:
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the first preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the first preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the second preset range, if meeting
The open-circuit voltage that the follow-up breaks in battery modules between single battery it is very poor less than the first predetermined voltage threshold and it is described to
The single battery diagnosed in battery modules is very poor less than described in the second preset threshold multiple in the AC internal Resistance under predeterminated frequency
The average value of the AC internal Resistance for the single battery that follow-up breaks in battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in third preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than third predetermined threshold value multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in the 4th preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the second predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the 4th preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Then determine the single battery that the follow-up breaks in battery modules
Consistency it is good, to the follow-up break battery modules integrally carry out echelon utilization；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off
Chi Mo group.
Preferably, wherein the system also includes 204 peace of the open-circuit voltage of: battery entirety and AC internal Resistance detection unit
Average calculation unit 205.
Preferably, the open-circuit voltage and AC internal Resistance detection unit 204 of the battery entirety, for being powered off when the follow-up
Chi Mo group be non-disconnectable battery modules, and can not detect the follow-up break battery modules in single battery open-circuit voltage
When with AC internal Resistance, the open-circuit voltage and AC internal Resistance of the disconnected battery modules entirety of the follow-up are detected
Preferably, the average calculation unit 205, for count the open-circuit voltage of retired battery modules with exchange in
Resistance, and calculate open-circuit voltage average value and AC internal Resistance average value.
The diagnosis unit 203, if the open-circuit voltage for being also used to the disconnected battery modules entirety of the follow-up is default less than the 5th
The internal resistance that the or AC internal Resistance of the open-circuit voltage average value of threshold multiple are higher than the 6th preset threshold multiple is average
Value, it is determined that the consistency of the disconnected battery modules of the follow-up is poor, eliminates the disconnected battery modules of the follow-up；Conversely, then to it is described to
Diagnosis battery modules integrally carry out echelon utilization.
Preferably, wherein the system also includes the open-circuit voltages and AC internal Resistance detection unit 207 of battery cell.It is excellent
Selection of land, the open-circuit voltage and AC internal Resistance detection unit 207 of the battery cell, for breaking battery modules when the follow-up as not
Removable battery modules, and be not directly detected the follow-up break battery modules in single battery open-circuit voltage with exchange in
When resistance, there is BMS communication interface in battery modules if the follow-up breaks, by the disconnected battery modules of the follow-up and BMS battery management
System is connected, and the communications protocol provided using the third-party institution, obtains the single battery in the disconnected battery modules of the follow-up
Open-circuit voltage and AC internal Resistance.
The system 200 for being diagnosed to the performance of non-disconnectable battery modules of the embodiment of the present invention and of the invention
The method 100 for being diagnosed to the performance of non-disconnectable battery modules of another embodiment is corresponding, and details are not described herein.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (10)
1. a kind of method that the performance for non-disconnectable battery modules is diagnosed, which is characterized in that the described method includes:
Judge whether the disconnected battery modules of follow-up are non-disconnectable battery modules according to the burst mode of battery modules；
Follow-up battery modules of breaking are non-disconnectable battery modules, are broken in battery modules when being determined to directly to detect the follow-up
Open-circuit voltage and friendship when the open-circuit voltage and AC internal Resistance of single battery, to the single battery in the disconnected battery modules of the follow-up
Stream internal resistance is detected；
The follow-up that will acquire break the single battery in battery modules open-circuit voltage and AC internal Resistance respectively with preset diagnosis plan
Open-circuit voltage and AC internal Resistance in slightly are compared, with the performance of the disconnected battery modules of the determination follow-up.
2. the method according to claim 1, wherein described judge according to the burst mode of battery modules wait diagnose
Whether battery modules are non-disconnectable battery modules, comprising:
If the follow-up break battery modules in elevator battery cell between connection type be laser welding or ultrasonic welding,
Determine that the follow-up breaks battery modules as non-disconnectable battery modules；
The connection type between battery cell if the follow-up breaks in battery modules is to be bolted, it is determined that described wait diagnose
Battery modules are removable battery modules.
3. the monomer electricity the method according to claim 1, wherein the follow-up that will acquire breaks in battery modules
The open-circuit voltage and AC internal Resistance in pond respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance be compared, with true
The performance of the fixed disconnected battery modules of the follow-up, comprising:
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the first preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the first preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the second preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the second preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in third preset range, if meeting the follow-up
Open-circuit voltage in disconnected battery modules between single battery is very poor less than the first predetermined voltage threshold and the follow-up powers off pond
The very poor follow-up less than third predetermined threshold value multiple of AC internal Resistance of the single battery under predeterminated frequency in mould group powers off
The average value of the AC internal Resistance of single battery in Chi Mo group；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in the 4th preset range, if meeting the follow-up
Open-circuit voltage in disconnected battery modules between single battery is very poor less than the second predetermined voltage threshold and the follow-up powers off pond
The very poor follow-up less than the 4th preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in mould group powers off
The average value of the AC internal Resistance of single battery in Chi Mo group；Then determine the one of the single battery that the follow-up breaks in battery modules
Cause property is good, integrally carries out echelon utilization to the disconnected battery modules of the follow-up；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off pond mould
Group.
4. the method according to claim 1, wherein the method also includes:
When the follow-up break battery modules be non-disconnectable battery modules, and can not detect the follow-up break battery modules in
When the open-circuit voltage and AC internal Resistance of single battery, detect the follow-up break battery modules entirety open-circuit voltage with exchange in
Resistance；
The open-circuit voltage and AC internal Resistance of retired battery modules are counted, and calculates open-circuit voltage average value and internal resistance average value；
If the follow-up breaks, the open-circuit voltage of battery modules entirety is average less than the open-circuit voltage of the 5th preset threshold multiple
The or AC internal Resistance of value are higher than the internal resistance average value of the 6th preset threshold multiple, it is determined that the follow-up breaks battery modules
Consistency it is poor, eliminate the follow-up break battery modules；Conversely, then integrally carrying out echelon benefit to the disconnected battery modules of the follow-up
With.
5. the method according to claim 1, wherein the method also includes:
When the follow-up break battery modules be non-disconnectable battery modules, and be not directly detected the follow-up break battery modules
When the open-circuit voltage and AC internal Resistance of middle single battery, there is BMS communication interface in battery modules if the follow-up breaks, it will be described
The disconnected battery modules of follow-up are connected with BMS battery management system, and utilize the communications protocol of third-party institution's offer, described in acquisition
The open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of follow-up.
6. a kind of system that the performance for non-disconnectable battery modules is diagnosed, which is characterized in that the system comprises:
Non-disconnectable battery modules determination unit, for the burst mode according to battery modules judge follow-up break battery modules whether be
Non-disconnectable battery modules；
The open-circuit voltage and AC internal Resistance detection unit of battery cell break battery modules for the follow-up as non-disconnectable battery mould
Group, when being determined to directly detect the open-circuit voltage and AC internal Resistance of single battery in the disconnected battery modules of the follow-up, to institute
The open-circuit voltage and AC internal Resistance for stating the single battery in the disconnected battery modules of follow-up are detected；
Diagnosis unit, follow-up for will acquire break the single battery in battery modules open-circuit voltage and AC internal Resistance respectively with
Open-circuit voltage and AC internal Resistance in preset Diagnostic Strategy are compared, with the performance of the disconnected battery modules of the determination follow-up.
7. system according to claim 6, which is characterized in that the non-disconnectable battery modules determination unit, according to battery
The burst mode of mould group judges whether the disconnected battery modules of follow-up are non-disconnectable battery modules, comprising:
If the follow-up break battery modules in elevator battery cell between connection type be laser welding or ultrasonic welding,
Determine that the follow-up breaks battery modules as non-disconnectable battery modules；
The connection type between battery cell if the follow-up breaks in battery modules is to be bolted, it is determined that described wait diagnose
Battery modules are removable battery modules.
8. system according to claim 6, which is characterized in that the diagnosis unit, the follow-up that will acquire break battery modules
In single battery open-circuit voltage and AC internal Resistance respectively in preset Diagnostic Strategy open-circuit voltage and AC internal Resistance into
Row compares, with the performance of the disconnected battery modules of the determination follow-up, comprising:
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the first preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the first preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ferric phosphate lithium cell, when open-circuit voltage is in the second preset range, if described in meeting
Open-circuit voltage in the disconnected battery modules of follow-up between single battery is very poor less than the first predetermined voltage threshold and described wait diagnose
The very poor follow-up less than the second preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in battery modules
The average value of the AC internal Resistance of single battery in disconnected battery modules；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in third preset range, if meeting the follow-up
Open-circuit voltage in disconnected battery modules between single battery is very poor less than the first predetermined voltage threshold and the follow-up powers off pond
The very poor follow-up less than third predetermined threshold value multiple of AC internal Resistance of the single battery under predeterminated frequency in mould group powers off
The average value of the AC internal Resistance of single battery in Chi Mo group；Or
When the follow-up breaks battery modules for ternary battery, when open-circuit voltage is in the 4th preset range, if meeting the follow-up
Open-circuit voltage in disconnected battery modules between single battery is very poor less than the second predetermined voltage threshold and the follow-up powers off pond
The very poor follow-up less than the 4th preset threshold multiple of AC internal Resistance of the single battery under predeterminated frequency in mould group powers off
The average value of the AC internal Resistance of single battery in Chi Mo group；Then determine the one of the single battery that the follow-up breaks in battery modules
Cause property is good, integrally carries out echelon utilization to the disconnected battery modules of the follow-up；
It is on the contrary, it is determined that the consistency for the single battery that the follow-up breaks in battery modules is poor, eliminates the follow-up power-off pond mould
Group.
9. system according to claim 6, which is characterized in that the system also includes:
The open-circuit voltage and AC internal Resistance detection unit of battery entirety, for breaking battery modules when the follow-up as non-disconnectable battery
Mould group, and in it can not detect the disconnected battery modules of the follow-up when open-circuit voltage and AC internal Resistance of single battery, detection
The open-circuit voltage and AC internal Resistance of the disconnected battery modules entirety of the follow-up；
Average calculation unit for counting the open-circuit voltage and AC internal Resistance of retired battery modules, and calculates open-circuit voltage
Average value and AC internal Resistance average value；
The diagnosis unit, if the open-circuit voltage for the disconnected battery modules entirety of the follow-up is less than the 5th preset threshold multiple
The or AC internal Resistance of the open-circuit voltage average value are higher than the internal resistance average value of the 6th preset threshold multiple, it is determined that institute
The consistency for stating the disconnected battery modules of follow-up is poor, eliminates the disconnected battery modules of the follow-up；Conversely, then to the disconnected battery modules of the follow-up
It is whole to carry out echelon utilization.
10. system according to claim 7, which is characterized in that the system also includes:
The open-circuit voltage and AC internal Resistance detection unit of battery cell, for breaking battery modules when the follow-up as non-disconnectable battery
Mould group, and be not directly detected the follow-up break battery modules in single battery open-circuit voltage and AC internal Resistance when, if
There is BMS communication interface in the disconnected battery modules of the follow-up, then the disconnected battery modules of the follow-up is connected with BMS battery management system
The communications protocol for connecing, and being provided using the third-party institution obtains the open circuit electricity of the single battery in the disconnected battery modules of the follow-up
Pressure and AC internal Resistance.
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