CN114895201A - Battery monitoring method and device - Google Patents
Battery monitoring method and device Download PDFInfo
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- CN114895201A CN114895201A CN202210357716.1A CN202210357716A CN114895201A CN 114895201 A CN114895201 A CN 114895201A CN 202210357716 A CN202210357716 A CN 202210357716A CN 114895201 A CN114895201 A CN 114895201A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 36
- 238000012806 monitoring device Methods 0.000 claims description 6
- 230000006378 damage Effects 0.000 abstract description 9
- 230000002159 abnormal effect Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a monitoring method and a device of a battery, wherein the monitoring method comprises the following steps: acquiring expansion pressure between adjacent cells in at least one battery module; determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cells in at least one battery module; the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. Through the inflation pressure between the adjacent electric core in the monitoring battery module, can gather the inside expansibility change of module in the full life cycle and carry out thermal runaway early warning and warning, monitor the battery and carry out the early warning according to the inflation pressure between the adjacent electric core in the battery module, promote the promptness and the degree of accuracy of early warning, can intervene in advance to early warning, warning vehicle, improve the safety performance in the whole car full life cycle, reduce the accident that the battery damage brought.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a battery monitoring method and device.
Background
With the continuous maturity of lithium battery technology and the vigorous support of national policies, the development of new energy automobiles is very rapid, but the current electric automobiles always face the problems of insufficient endurance mileage, insufficient safety and the like, the energy density of the batteries is gradually improved along with the improvement of the requirement of the endurance mileage, the market reserve is also gradually improved, and the importance of safety problems is increasingly prominent. Recently, safety accidents of electric vehicles frequently occur, most of the accidents are caused by the fire of a power battery, and the thermal runaway safety of the new energy vehicle industry becomes the focus of attention of people.
The failure reasons of the lithium ion battery are quite complex, but the failure reasons can be mainly divided into self defects and abuse, and long-time accumulation can cause thermal runaway of a battery system and harm life and property safety of passengers. Currently, safety guarantee of a full life cycle of a battery system is actively explored from a battery core level, a module level, a battery system level and a whole vehicle level, but systematic safety research aiming at the full life cycle is not available. The early warning and alarming method generally adopted by the existing host factory is realized only by monitoring the voltage and the temperature of the battery, a large number of accidents still can not be timely, even early warning and alarming can not be realized at all, and the purpose of better thermal runaway monitoring can not be achieved.
Disclosure of Invention
The embodiment of the invention aims to provide a battery monitoring method and device, which are used for solving the problems of untimely and inaccurate monitoring and early warning of the existing battery.
In a first aspect, an embodiment of the present invention provides a method for monitoring a battery, including:
acquiring expansion pressure between adjacent battery cells in at least one battery module;
determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cells in at least one battery module;
the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure.
Wherein, confirm whether to send the step of reminding the information including according to the parameter information of the inflation pressure between the adjacent electric core in at least one battery module:
determining whether to send out reminding information according to the expansion pressure between adjacent battery cells in at least one battery module;
when the size of the expansion pressure between the adjacent electric cores in at least one battery module is larger than or equal to a preset pressure value, reminding information is sent.
Wherein, confirm whether to send the step of reminding the information including according to the parameter information of the inflation pressure between the adjacent electric core in at least one battery module:
determining whether to send out reminding information according to the change rate of the expansion pressure between the adjacent battery cores in at least one battery module;
when the change rate of the expansion pressure between the adjacent battery cells in at least one battery module is greater than or equal to the preset rate, reminding information is sent.
Wherein, the step of obtaining the expansion pressure between adjacent electric core in at least one battery module includes:
acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent battery cores in at least one battery module comprises the following steps:
determining whether to send out reminding information according to the pressure deviation between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules;
when the pressure deviation amount between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to the preset deviation amount, the reminding information is determined to be sent.
Wherein, the step of obtaining the expansion pressure between adjacent electric core in at least one battery module includes:
acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent battery cores in at least one battery module comprises the following steps:
determining whether to send out reminding information according to the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules;
when the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the remaining battery modules is larger than or equal to the preset variation deviation amount, the reminding information is determined to be sent.
Wherein, the step of obtaining the expansion pressure between adjacent electric core in at least one battery module includes:
acquiring expansion pressure between adjacent battery cores in the same battery module at a first time and a second time, wherein the first time is earlier than the second time;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent battery cores in at least one battery module comprises the following steps:
and when the second moment is smaller than the expansion pressure between the adjacent electric cores in the same battery module at the first moment, determining to send out the reminding information.
In a second aspect, an embodiment of the present invention provides a device for monitoring a battery, including:
the acquisition module is used for acquiring the expansion pressure between adjacent battery cells in at least one battery module;
the reminding module is used for determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cores in at least one battery module;
the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure.
The reminding module is used for determining whether to send out reminding information according to the expansion pressure between adjacent battery cells in at least one battery module;
the reminding module is used for sending reminding information when the expansion pressure between the adjacent electric cores in at least one battery module is larger than or equal to a preset pressure value; or
The reminding module is used for determining whether to send out reminding information according to the change rate of the expansion pressure between the adjacent battery cores in at least one battery module;
the reminding module is used for sending reminding information when the change rate of the expansion pressure between the adjacent electric cores in at least one battery module is larger than or equal to a preset rate; or
The acquisition module is used for acquiring expansion pressure between adjacent battery cells in the plurality of battery modules;
the reminding module is used for determining whether to send out reminding information according to the pressure deviation between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules;
the reminding module is used for determining to send out reminding information when the pressure deviation amount between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to a preset deviation amount; or
The acquisition module is used for acquiring expansion pressure between adjacent battery cells in the plurality of battery modules;
the reminding module is used for determining whether to send out reminding information according to the variation deviation between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules;
the reminding module is used for determining to send out reminding information when the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to the preset variation deviation amount; or
The acquisition module is used for acquiring the expansion pressure between adjacent battery cores in the same battery module at a first time and a second time, wherein the first time is earlier than the second time;
and the reminding module is used for determining to send reminding information under the condition that the expansion pressure between the adjacent electric cores in one battery module is smaller than the expansion pressure between the adjacent electric cores in the same battery module at the first moment at the second moment.
In a third aspect, an embodiment of the present invention provides an electronic device, including a processor and a memory, where the memory stores a program or instructions executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method described in the foregoing embodiments.
In a fourth aspect, the present invention provides a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method described in the above embodiments.
The battery monitoring method provided by the embodiment of the invention comprises the following steps: acquiring expansion pressure between adjacent battery cells in at least one battery module; determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cells in at least one battery module; the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. Through the inflation pressure between the adjacent electric core in the monitoring battery module, can gather the inside expansibility change of module in the full life cycle and carry out thermal runaway early warning and warning, monitor the battery and carry out the early warning according to the inflation pressure between the adjacent electric core in the battery module, promote the promptness and the degree of accuracy of early warning, can intervene in advance to early warning, warning vehicle, improve the safety performance in the whole car full life cycle, reduce the accident that the battery damage brought.
Drawings
FIG. 1 is a schematic view of a connection of a monitoring device;
FIG. 2 is a schematic diagram of a cell structure;
FIG. 3 is an exploded view of the battery;
fig. 4 is a schematic diagram of the rate of change of expansion force between adjacent cells in a battery;
FIG. 5 is a schematic illustration of a structural failure of a battery;
fig. 6 is a schematic diagram illustrating changes in expansion force between adjacent cells in different battery modules;
reference numerals
An electric core 1; an end plate 2; a bus bar 3; a side plate 4;
an acquisition module 10; a pressure sensor 11;
a reminder module 20.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms first, second and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that embodiments of the invention may be practiced otherwise than as specifically illustrated and described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The following describes in detail a method for monitoring a battery according to an embodiment of the present invention with reference to fig. 1 to 6 through a specific embodiment and an application scenario thereof.
The battery monitoring method provided by the embodiment of the invention comprises the following steps:
acquiring expansion pressure between adjacent battery cells in at least one battery module;
determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cells in at least one battery module; the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. The reminder information may include sound information, photoelectric information, vibration information, text or pattern information, and the like.
According to the monitoring method of the battery, the expansion pressure between the adjacent battery cores in the battery module can be monitored, the change of the expansion force in the module in the whole life cycle can be collected to perform thermal runaway early warning and alarming, the battery is monitored according to the expansion pressure between the adjacent battery cores in the battery module and early warning is performed, the timeliness and the accuracy of the early warning are improved, early intervention can be performed on early warning and alarming vehicles, the safety performance of the whole vehicle in the whole life cycle is improved, and accidents caused by battery damage are reduced. The early warning degree of advance and the accurate coverage that can show promotion battery system, based on the thermal runaway heat production mechanism, adopt this signal of module expansibility to carry out the early warning and have the sensitivity height, the advantage that the strong reliability is high with the early warning degree of advance. The electric core is before the middle period of the aging process, the voltage and the temperature may not be changed obviously, but the pressure inside the electric core is changed, the abnormality can be identified in advance through the pressure change inside the module, early warning is carried out, the risk of thermal runaway is reduced, and the thermal runaway alarm of the method achieves the effect earlier than the voltage and temperature alarm. The system can monitor the vehicles in a non-working (parking and standing) state, and overcomes the defect that the vehicles cannot be early warned in the current parking state.
In some embodiments, the step of determining whether to issue the reminding message according to the parameter information of the expansion pressure between the adjacent cells in at least one battery module may include:
determining whether to send out reminding information according to the expansion pressure between adjacent battery cells in at least one battery module;
when the size of the expansion pressure between the adjacent electric cores in at least one battery module is larger than or equal to a preset pressure value, reminding information is sent. When the electricity core in the battery module appears unusually, the inflation pressure between the adjacent electricity core in the battery module can change, and the inflation pressure between the adjacent electricity core in the battery module can increase, and when the size of the inflation pressure between the adjacent electricity core in at least one battery module is greater than or equal to the preset pressure value, the warning information is sent to in time accurately remind the user, make the user can in time intervene and handle, reduce the accident that the battery damage brought.
In other embodiments, the step of determining whether to send out the reminding message according to the parameter information of the expansion pressure between the adjacent cells in at least one battery module may include:
determining whether to send out reminding information according to the change rate of the expansion pressure between the adjacent electric cores in at least one battery module;
when the change rate of the expansion pressure between the adjacent battery cells in at least one battery module is greater than or equal to the preset rate, reminding information is sent.
When the electricity core in the battery module appears unusually, the change rate of the inflation pressure between the adjacent electricity core can change in the battery module, the change rate of the inflation pressure between the adjacent electricity core can increase suddenly in the battery module, when the change rate of the inflation pressure between the adjacent electricity core is greater than or equal to and predetermines the speed in at least one battery module, send out warning information, so that can in time accurately remind the user, make the user can in time intervene and handle, reduce the accident that the battery damage brought. The thermal runaway alarm can be carried out through the abnormal change of the change rate of the expansion pressure between the adjacent electric cores in the battery module.
In the application process, as shown in fig. 4, when the battery core in the battery module is out of control due to heat, it is monitored that the expansion force inside the module is remarkably abnormal. Assuming that the battery module is normal, the average increasing rate of the expansion force in the battery module is V0 during charging; unusual appears in electric core, and the average increasing rate of the inside bulging force of battery module is V1, and unusual alarm coefficient can be k, and when V1> k V0, the battery system can report to the police, and the module is inside unusual, can in time remind the user.
In an embodiment of the present invention, the step of acquiring the expansion pressure between the adjacent battery cells in at least one battery module may include:
acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the step of determining whether to send out a reminding message according to the parameter information of the expansion pressure between the adjacent cells in at least one battery module may include:
determining whether to send out reminding information according to the pressure deviation between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules;
when the pressure deviation amount between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to the preset deviation amount, the reminding information is determined to be sent.
That is, the expansion pressure between the adjacent cells in the plurality of battery modules may be obtained, and whether to send out the reminding information is determined according to the pressure deviation between the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent cells in the remaining battery modules; when the pressure deviation amount between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to the preset deviation amount, the reminding information is determined to be sent. Through comparing the expansion pressure between the adjacent electric core in the battery module with the difference, can discover unusual battery module. When the battery module appears unusually, the inflation pressure between the adjacent electric core in the unusual battery module and the inflation pressure between the adjacent electric core in the normal battery module have the deviation, when the pressure deviation volume between the inflation pressure between the adjacent electric core in the unusual battery module and the inflation pressure between the adjacent electric core in the normal battery module is greater than or equal to and predetermines the deviation volume, can send warning information, so that can in time accurately remind the user, make the user can in time intervene and handle, reduce the accident that the battery damaged and bring.
In other embodiments, the step of acquiring the expansion pressure between the adjacent cells in at least one battery module may include:
acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the step of determining whether to send out a reminding message according to the parameter information of the expansion pressure between the adjacent cells in at least one battery module may include:
determining whether to send out reminding information according to the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules;
when the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the remaining battery modules is larger than or equal to the preset variation deviation amount, the reminding information is determined to be sent.
In the application process, the expansion pressure between the adjacent electric cores in the plurality of battery modules can be acquired, and whether the reminding information is sent or not is determined according to the variation deviation between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules; when the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the remaining battery modules is larger than or equal to the preset variation deviation amount, the reminding information is determined to be sent. Through comparing the change rate of the expansion pressure between the adjacent electric cores in the battery modules of different types, the abnormal battery module can be found. When the battery module appears unusually, the variation rate of the inflation pressure between the adjacent electric core in the unusual battery module and the variation rate of the inflation pressure between the adjacent electric core in the normal battery module have the deviation, when variation deviation between the variation rate of the inflation pressure between the adjacent electric core in the unusual battery module and the variation rate of the inflation pressure between the adjacent electric core in the normal battery module is greater than or equal to and predetermines variation deviation, can send out warning information, so that can in time accurately remind the user, make the user can in time intervene and handle, reduce the accident that the battery damage brought. Through the horizontal contrast between all modules in the battery, discern unusual module, carry out the early warning.
In the full life cycle of battery module, can monitor the bulging force between the adjacent electric core in all battery modules in the battery in real time. Supposing that n battery modules are arranged in the battery, when the battery core in one of the battery modules has the characteristics of accelerated aging, thickened pole piece, accelerated gas production rate and the like, as shown in fig. 6, a curve a represents the expansion force change of the abnormal module, a curve b represents the expansion force change of the normal module, and the deviation degree and the variation of the expansion force Fn of the abnormal module and the expansion force F of the other normal modules are transversely compared to perform early warning, wherein the abnormal early warning coefficient is K, and the larger the K value is, the more serious the fault is.
The swell force growth rate Vn between adjacent cells in the abnormal module may be:
Vn＝Fn/t
the average rate of increase Vavg of the expansion force between adjacent cells in a normal module can be:
Vavg＝(F1+F2+…+Fn)-Fn/(n-1)t
the abnormality warning coefficient K may be:
k＝Vn/Vavg。
when the variation deviation between the expansion force increase rate between the adjacent electric cores in the abnormal module and the average expansion force increase rate between the adjacent electric cores in the normal module exceeds a preset value, reminding information can be sent out to remind a user, so that the user can intervene and process in time, and accidents caused by battery damage are reduced. The failure of the module structure can be alarmed in a grading way through the module structure strength threshold value.
In some embodiments, the step of acquiring the expansion pressure between adjacent cells in at least one battery module may include:
acquiring expansion pressure between adjacent battery cores in the same battery module at a first time and a second time, wherein the first time is earlier than the second time;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent battery cells in the at least one battery module may include:
and when the second moment is smaller than the expansion pressure between the adjacent electric cores in the same battery module at the first moment, determining to send out the reminding information.
The first moment can be a moment before the module structure of battery module became invalid, and the second moment can be a moment after the module structure of battery module became invalid, and when the swelling power in same module falls abnormally and reaches unusually, can send out warning information to can in time accurately remind the user, make the user can in time intervene and handle.
The inside Fn that has at least one battery module of battery reaches module structural strength threshold value F value when the battery, early warning module structure failure risk in advance, unusual early warning coefficient is K, wherein, Fn F is given as the K, and K numerical value is big more, and the trouble is more serious. Before module structure became invalid module internal pressure was Fn, module structure became invalid back module internal pressure be behind the Fn, and unusual alarm coefficient is K, wherein, behind K being Fn before/Fn, when same module internal expansion power fall unusually and reach unusual alarm coefficient and be K, then report module structure failure trouble. As shown in fig. 5, the battery module structure is failed at the position c.
An embodiment of the present invention provides a monitoring device for a battery, as shown in fig. 1, the monitoring device may include:
the acquiring module 10 may be configured to acquire an expansion pressure between adjacent battery cells in at least one battery module;
the reminding module 20 may be configured to determine whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cells in at least one battery module; the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. In the monitoring device of the battery according to the embodiment of the present invention, the obtaining module 10 may obtain the expansion pressure between the adjacent electric cores in at least one battery module; whether to send out the reminding information can be determined by the reminding module 20 according to the parameter information of the expansion pressure between the adjacent battery cells in at least one battery module. Through the inflation pressure between the adjacent electric core in the monitoring battery module, can gather the inside expansibility change of module in the full life cycle and carry out thermal runaway early warning and warning, monitor the battery and carry out the early warning according to the inflation pressure between the adjacent electric core in the battery module, promote the promptness and the degree of accuracy of early warning, can intervene in advance to early warning, warning vehicle, improve the safety performance in the whole car full life cycle, reduce the accident that the battery damage brought.
As shown in fig. 3, the obtaining module 10 may include a pressure sensor 11, and the pressure sensor 11 may be disposed between adjacent battery cells 1 in the battery module to monitor the expansion pressure between the adjacent battery cells 1 in the battery module. As shown in fig. 2, four battery cells 1 may be formed by connecting bus bars 3 in series, pressure sensors 11 may be disposed between the battery cells 1, and finally, the end plate 2 and the side plate 4 may be welded to form a module as a whole.
Optionally, the reminding module 20 may be configured to determine whether to send out a reminding message according to the magnitude of the expansion pressure between the adjacent battery cells in the at least one battery module;
the reminding module 20 may be configured to send out reminding information when the magnitude of the expansion pressure between the adjacent electric cores in the at least one battery module is greater than or equal to a preset pressure value.
Optionally, the reminding module 20 may be configured to determine whether to send out a reminding message according to a change rate of the expansion pressure between the adjacent battery cells in the at least one battery module;
the reminding module 20 may be configured to send out a reminding message when a change rate of the expansion pressure between the adjacent electric cores in the at least one battery module is greater than or equal to a preset rate.
Optionally, the obtaining module 10 may be configured to obtain expansion pressure between adjacent battery cells in a plurality of battery modules;
the reminding module 20 may be configured to determine whether to send out a reminding message according to a pressure deviation between an expansion pressure between adjacent electric cores of a target battery module in the plurality of battery modules and an expansion pressure between adjacent electric cores in the remaining battery modules;
the reminding module 20 may be configured to determine to send out the reminding information when a pressure deviation between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the remaining battery modules is greater than or equal to a preset deviation.
Optionally, the obtaining module 10 may be configured to obtain expansion pressure between adjacent battery cells in a plurality of battery modules;
the reminding module 20 may be configured to determine whether to send out a reminding message according to a variation deviation between a variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and a variation rate of the expansion pressure between the adjacent electric cores in the remaining battery modules;
the reminding module 20 may be configured to determine to send out the reminding information when a variation deviation between a variation rate of the swelling pressure between the adjacent electric cores of the target battery module among the plurality of battery modules and a variation rate of the swelling pressure between the adjacent electric cores in the remaining battery modules is greater than or equal to a preset variation deviation.
Optionally, the obtaining module 10 may be configured to obtain an expansion pressure between adjacent battery cells in the same battery module at a first time and a second time, where the first time is earlier than the second time;
the reminding module 20 may be configured to determine to send the reminding information when the expansion pressure between the adjacent electric cores in one battery module is smaller than the expansion pressure between the adjacent electric cores in the same battery module at the first moment at the second moment.
An embodiment of the present invention provides an electronic device, including a processor and a memory, where the memory stores a program or instructions executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the monitoring method described in the above embodiment.
Embodiments of the present invention provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the monitoring method described in the above embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method of monitoring a battery, comprising:
acquiring expansion pressure between adjacent battery cells in at least one battery module;
determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cells in at least one battery module;
the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure.
2. The monitoring method according to claim 1, wherein the step of determining whether to send out the reminding message according to the parameter information of the expansion pressure between the adjacent cells in at least one battery module comprises:
determining whether to send out reminding information according to the expansion pressure between adjacent battery cells in at least one battery module;
when the size of the expansion pressure between the adjacent electric cores in at least one battery module is larger than or equal to a preset pressure value, reminding information is sent.
3. The monitoring method according to claim 1, wherein the step of determining whether to send out the reminding message according to the parameter information of the expansion pressure between the adjacent cells in at least one battery module comprises:
determining whether to send out reminding information according to the change rate of the expansion pressure between the adjacent battery cores in at least one battery module;
when the change rate of the expansion pressure between the adjacent battery cells in at least one battery module is greater than or equal to the preset rate, reminding information is sent.
4. The monitoring method of claim 1, wherein the step of obtaining the expansion pressure between adjacent cells in at least one battery module comprises:
acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent battery cores in at least one battery module comprises the following steps:
determining whether to send out reminding information according to the pressure deviation between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules;
when the pressure deviation amount between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to the preset deviation amount, the reminding information is determined to be sent.
5. The monitoring method of claim 1, wherein the step of obtaining the expansion pressure between adjacent cells in at least one battery module comprises:
acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent electric cores in at least one battery module comprises the following steps:
determining whether to send out reminding information according to the variation deviation between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules;
when the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the remaining battery modules is larger than or equal to the preset variation deviation amount, the reminding information is determined to be sent.
6. The monitoring method according to claim 1,
the step of obtaining the expansion pressure between adjacent cells in at least one battery module comprises:
acquiring expansion pressure between adjacent cells in the same battery module at a first time and a second time, wherein the first time is earlier than the second time;
the step of determining whether to send out the reminding information according to the parameter information of the expansion pressure between the adjacent battery cores in at least one battery module comprises the following steps:
when the second moment, the expansion pressure between the adjacent electric cores in the battery module is smaller than that of the adjacent electric cores in the same battery module when the first moment, and the reminding information is determined to be sent out.
7. A battery monitoring device, comprising:
the acquisition module is used for acquiring the expansion pressure between adjacent battery cells in at least one battery module;
the reminding module is used for determining whether to send out reminding information according to parameter information of expansion pressure between adjacent battery cores in at least one battery module;
the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure.
8. The monitoring device of claim 7,
the reminding module is used for determining whether to send out reminding information according to the expansion pressure between the adjacent electric cores in at least one battery module;
the reminding module is used for sending reminding information when the expansion pressure between the adjacent electric cores in at least one battery module is larger than or equal to a preset pressure value; or
The reminding module is used for determining whether to send out reminding information according to the change rate of the expansion pressure between the adjacent electric cores in the at least one battery module;
the reminding module is used for sending reminding information when the change rate of the expansion pressure between the adjacent electric cores in at least one battery module is greater than or equal to a preset rate; or
The acquisition module is used for acquiring the expansion pressure between the adjacent electric cores in the plurality of battery modules;
the reminding module is used for determining whether to send out reminding information according to the pressure deviation between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules;
the reminding module is used for determining to send out reminding information when the pressure deviation amount between the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to a preset deviation amount; or
The acquisition module is used for acquiring expansion pressure between adjacent electric cores in the plurality of battery modules;
the reminding module is used for determining whether to send out reminding information according to the variation deviation between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules;
the reminding module is used for determining to send out reminding information when the variation deviation amount between the variation rate of the expansion pressure between the adjacent electric cores of the target battery module in the plurality of battery modules and the variation rate of the expansion pressure between the adjacent electric cores in the rest battery modules is larger than or equal to the preset variation deviation amount; or
The acquisition module is used for acquiring the expansion pressure between adjacent electric cores in the same battery module at a first time and a second time, wherein the first time is earlier than the second time;
and the reminding module is used for determining to send reminding information under the condition that the expansion pressure between the adjacent electric cores in one battery module is smaller than the expansion pressure between the adjacent electric cores in the same battery module at the first moment at the second moment.
9. An electronic device comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions when executed by the processor implementing the steps of the method of any of claims 1-6.
10. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the method of any one of claims 1-6.
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| CN202210357716.1A CN114895201A (en) | 2022-04-06 | 2022-04-06 | Battery monitoring method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116646620A (en) * | 2023-01-11 | 2023-08-25 | 广州锐速智能科技股份有限公司 | Power management method and device for high-voltage battery system |
| CN117388725A (en) * | 2023-03-13 | 2024-01-12 | 中国石油大学(华东) | Early abnormality early warning method based on expansion force of lithium ion battery |
| CN117429264A (en) * | 2023-12-21 | 2024-01-23 | 钛深科技(深圳)有限公司 | Maintenance detection method of battery module, storage medium, automobile and energy storage system |
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2022
- 2022-04-06 CN CN202210357716.1A patent/CN114895201A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116646620A (en) * | 2023-01-11 | 2023-08-25 | 广州锐速智能科技股份有限公司 | Power management method and device for high-voltage battery system |
| CN117388725A (en) * | 2023-03-13 | 2024-01-12 | 中国石油大学(华东) | Early abnormality early warning method based on expansion force of lithium ion battery |
| CN117429264A (en) * | 2023-12-21 | 2024-01-23 | 钛深科技(深圳)有限公司 | Maintenance detection method of battery module, storage medium, automobile and energy storage system |
| CN117429264B (en) * | 2023-12-21 | 2024-03-29 | 钛深科技(深圳)有限公司 | Maintenance detection method of battery module, storage medium, automobile and energy storage system |
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