CN116735029B - Battery safety monitoring system, method and device - Google Patents
Battery safety monitoring system, method and device Download PDFInfo
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- CN116735029B CN116735029B CN202311010960.1A CN202311010960A CN116735029B CN 116735029 B CN116735029 B CN 116735029B CN 202311010960 A CN202311010960 A CN 202311010960A CN 116735029 B CN116735029 B CN 116735029B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000013307 optical fiber Substances 0.000 claims abstract description 45
- 238000012545 processing Methods 0.000 claims abstract description 41
- 239000004020 conductor Substances 0.000 claims abstract description 36
- 238000012806 monitoring device Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 19
- 238000004458 analytical method Methods 0.000 claims description 12
- 238000001069 Raman spectroscopy Methods 0.000 claims description 5
- 239000002313 adhesive film Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000004861 thermometry Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052744 lithium Inorganic materials 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/324—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Raman scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
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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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- 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
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application discloses a battery safety monitoring system, a battery safety monitoring method and a battery safety monitoring device. Comprises a sheet-shaped optical fiber sensing device and a signal acquisition and processing device, wherein the sheet-shaped optical fiber sensing device covers all battery cells. The sensing device and the signal acquisition processing device are mutually independent and can be connected through an interface. The sensing device is made of two-sheet heat-conducting materials, and a plurality of groups of net-shaped structure optical fiber pairs are arranged in the sensing device. The application mainly aims at solving the problems that the traditional battery temperature monitoring system is easy to fail, the implementation complexity of the novel battery safety monitoring system is extremely high, the universality is not strong, and the battery safety monitoring system is easy to damage and fail under external conditions, and provides an innovative and targeted solution. The lithium battery monitoring system can simply and efficiently realize real-time safety monitoring of the lithium battery, and can be applied to the situation that only the battery is required to be monitored regularly and safely, and has the advantages of low cost, convenient use, difficult damage and long service life.
Description
Technical Field
The present application relates to the field of battery safety monitoring, and in particular, to a battery safety monitoring system, method and apparatus.
Background
With the widespread use of lithium batteries, the safety problems that frequently occur are not negligible. The thermal runaway phenomenon is often that a certain battery is firstly abnormal, the temperature is rapidly increased in a short time, then the temperature of the battery at an adjacent position is increased, and finally the whole battery pack enters a thermal runaway state. In addition, the deformation of the battery compartment is also a common and typical fault of the battery, the deformation of the battery compartment is very tiny in the initial stage, and the working performance of the battery is hardly affected, but the change of the internal structure of the battery is caused in the long term, the battery is damaged, and the phenomena of thermal runaway, such as short circuit, leakage and the like of the battery are caused. Therefore, the battery temperature needs to be monitored, abnormality is found timely, and early warning is sent out.
In the prior art, a system for carrying out lithium battery safety monitoring by using an optical fiber sensing adhesive tape is arranged on the surface of the whole battery compartment by using only two optical fibers, the system is easy to damage and lose efficacy, the risk resistance performance is weak, and the system has the problems of complex implementation, inconvenience, low universality and the like during arrangement. Therefore, how to simplify the implementation process, improve the service life and the risk resistance of the monitoring system when realizing the safety monitoring of the battery becomes a problem to be solved urgently.
Disclosure of Invention
Based on the above problems, the application provides a battery safety monitoring system, a battery safety monitoring method and a battery safety monitoring device, so as to simplify the implementation process and improve the working life and the risk resistance of the monitoring system.
The application discloses a battery safety monitoring system, comprising: the sensing device and the signal acquisition and processing device;
the sensing device and the signal acquisition and processing device are mutually independent and are connected through an interface;
the sensing device comprises two sheet-shaped heat conducting materials which are respectively covered on the positive electrode surfaces and the negative electrode surfaces of all battery cells in the battery pack;
a plurality of groups of optical fiber pairs with net structures are arranged in the heat conducting material and are used for measuring temperature and strain;
the signal acquisition processing device is used for transmitting, receiving, processing and monitoring laser results.
Optionally, a groove is disposed on a surface of the heat conductive material facing the battery core, for arranging the optical fiber pair.
Alternatively to this, the method may comprise,
the optical fiber pairs are densely staggered in groups and distributed in the heat conducting material in a net structure;
and a plurality of groups of optical fiber pairs are densely staggered and cover the whole surface of the heat conducting material facing the battery core in a net shape.
Optionally, the interfaces at two ends of each group of the optical fiber pairs on the same heat conducting material are converged at one place.
Optionally, an insulating heat-conducting adhesive film is disposed on the surface of the heat-conducting material facing the battery core, and the insulating heat-conducting adhesive film is used for arranging the heat-conducting material on the positive electrode surface or the negative electrode surface of the battery core.
Optionally, the signal acquisition and processing device includes:
the laser signal transmitting module is used for transmitting detection laser;
the signal receiving module is used for receiving the optical signal returned by the sensing device;
the signal processing analysis module is used for analyzing the optical signals to obtain temperature information and strain information of the environment where the sensing device is located;
and the communication module is used for feeding back the information obtained by the signal processing and analyzing module to the outside.
Optionally, the laser signal transmitting module includes a plurality of groups of acousto-optic modulators, configured to modulate the detection laser into a plurality of groups of pulse light with different frequency shifts, and send the pulse light to the sensing device.
Optionally, the signal processing analysis module includes a raman thermometry part and a brillouin strain detection part, which are respectively used for obtaining the temperature information and the strain information.
Based on the above battery safety monitoring system, the application discloses a battery safety monitoring method, which comprises the following steps:
disposing a sensing device on the positive and negative electrode surfaces of all battery cells in the battery pack;
modulating the detection laser into a plurality of groups of pulse light with different frequency shifts, and transmitting the pulse light into the sensing device;
receiving a plurality of groups of optical signals returned by the pulse light through the sensing device;
and analyzing the optical signal to obtain temperature information and strain information of the environment where the sensing device is located.
Optionally, after obtaining the temperature information and the strain information of the environment in which the sensing device is located, the method further includes: and when the temperature information and the strain information are judged to be abnormal, sending out early warning information in real time.
Optionally, after obtaining the temperature information and the strain information of the environment in which the sensing device is located, the method further includes: and uploading the temperature information and the strain information to a cloud or mobile terminal device for storage.
Based on the above-mentioned battery safety monitoring method, the application also discloses a battery safety monitoring device, comprising: an arrangement unit, a pulsed light emitting unit, an optical signal receiving unit, and an information analyzing unit;
the arrangement unit is used for arranging the sensing device on the positive and negative electrode surfaces of all battery cells in the battery pack;
the pulse light emitting unit is used for modulating the detection laser into a plurality of groups of pulse light with different frequency shifts and emitting the pulse light into the sensing device;
the optical signal receiving unit is used for receiving a plurality of groups of optical signals returned by the pulse light through the sensing device;
the information analysis unit is used for analyzing the optical signals to obtain temperature information and strain information of the environment where the sensing device is located.
Optionally, the apparatus further includes: and the early warning unit is used for sending out early warning information in real time when judging that the temperature information and the strain information are abnormal.
Optionally, the apparatus further includes: and the storage unit is used for uploading the temperature information and the strain information to the cloud or mobile terminal equipment for storage.
The application discloses a battery safety monitoring system, a battery safety monitoring method and a battery safety monitoring device. Comprises a sheet-shaped optical fiber sensing device and a signal acquisition and processing device, wherein the sheet-shaped optical fiber sensing device covers all battery cells. The sensing device and the signal acquisition processing device are mutually independent and can be connected through an interface. The sensing device is made of two-sheet heat conducting materials, and a plurality of groups of net-shaped structure optical fiber pairs are arranged in the sensing device. The application mainly aims at solving the problems that the traditional battery temperature monitoring system is easy to fail, the implementation complexity of the novel battery safety monitoring system is extremely high, the universality is not strong, and the battery safety monitoring system is easy to damage and fail under external conditions, and provides an innovative and targeted solution. The lithium battery monitoring system can simply and efficiently realize real-time safety monitoring of the lithium battery, and can be applied to the situation that only the battery is required to be monitored regularly and safely, and has the advantages of low cost, convenient use, difficult damage and long service life.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1a is a schematic structural diagram of a battery safety monitoring system according to an embodiment of the present application;
FIG. 1b is a schematic diagram illustrating an optical fiber pair arrangement of a battery safety monitoring system according to an embodiment of the present application;
fig. 1c is a schematic diagram of a heat conductive material arrangement of a battery safety monitoring system according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a battery safety monitoring method according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a battery safety monitoring device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application discloses a battery safety monitoring system, and fig. 1a is a schematic structural diagram of the battery safety monitoring system disclosed in the embodiment of the application. As shown in fig. 1a, a battery safety monitoring system includes: the device comprises a sensing device 101, a battery pack 102, a signal acquisition processing device 103, an optical fiber connection port 104 and a signal transmission connection line 105. The sensing device 101 and the signal acquisition processing device 103 are independent and can be connected through an optical fiber connection port 104 and a signal transmission connection line 105 which are mutually matched.
Fig. 1b is a schematic diagram of an optical fiber pair arrangement of a battery safety monitoring system according to an embodiment of the present application, and as shown in fig. 1b, a main body portion of a sensing device 101 is two pieces of sheet-shaped heat conducting materials 106, which respectively cover the positive electrode surfaces and the negative electrode surfaces of all battery cells in a battery pack 102. The battery cells, which are not shown one by one in the figures, may be considered as part of the battery pack 102. The sheet-shaped heat conducting material 106 is internally provided with a plurality of groups of optical fiber pairs 107 with a net structure, and each group of optical fiber pairs 107 are densely and alternately distributed in the sheet-shaped heat conducting material 106 in different forms.
The optical fiber pairs 107 may be arranged on the surface of the whole sheet-like heat conductive material 106 in a desired design distribution pattern or in a random pattern, and the distribution pattern of the optical fiber pairs 107 is not particularly limited herein, and the surface of the whole sheet-like heat conductive material 106 may be covered.
The interfaces at both ends of each optical fiber pair 107 on the same piece of thermally conductive material 106 are converged together, and both optical fibers in one optical fiber pair 107 can be used for measuring temperature and strain. As an alternative, each group of optical fiber pairs 107 is located in a recess provided in the sheet-like thermally conductive material 106, adapted thereto, the recess being provided on that surface of the sheet-like thermally conductive material 106 which faces the battery pack 102.
Fig. 1c is a schematic diagram of a heat conductive material arrangement of a battery safety monitoring system according to an embodiment of the present application. As shown in fig. 1c, an insulating and heat-conducting adhesive film 108 covers the surface of the sheet-like heat-conducting material 106 facing the battery pack 102, the adhesive portion thereof can be used to arrange two sheet-like heat-conducting materials 106 on the positive electrode surface and the negative electrode surface of the battery pack 102, respectively, and the two sheet-like heat-conducting materials 106 can be freely cascaded.
In the system described in this embodiment, the signal acquisition processing device 103 is a mobile chassis with four-port and mobile, and the chassis includes a laser signal transmitting module, a signal receiving module, a signal processing analysis module and a WiFi communication module. The signal processing analysis module further comprises a Raman temperature measurement part and a Brillouin strain detection part, and the two paths of received optical signals are processed and analyzed respectively.
The system of this embodiment designs the signal acquisition processing device as a detachable and independent device, so that the system not only can be used for monitoring the conditions of temperature, strain and the like of the lithium battery in real time, but also can be suitable for a scene of safely monitoring the battery only by a period. The reticular optical fiber sensing structure arranged in the sheet-shaped heat conducting material greatly improves the detection range and the temperature and strain sensitivity. In addition, when a fault occurs in an individual battery and abnormal heating occurs, the generated heat can be effectively dispersed through the sheet-shaped heat conducting material, so that the temperature rising speed is reduced, the safety of the battery is improved, and time is also striven for maintenance personnel to carry out rush repair. And there is very big optical fiber sensor redundancy in the netted optical fiber sensing structure, even cause that wherein somewhere optic fibre breaks under external impact or heavy object extrusion, still there is the optical fiber sensor pair that the array can normally carry out monitoring work, and safety monitoring system still can normally work. The optical fiber sensor which does not need any special processing is low in cost, the service life of the lithium battery safety monitoring system can be effectively prolonged by the design of the net-shaped optical fiber structure with extremely low cost, meanwhile, the workload of maintenance staff is greatly reduced, the labor cost is saved, and the cost performance is extremely high. Finally, the system of the embodiment can be produced in batch by automatic processing, and then deployed on the surface of the existing battery which needs to be safely monitored according to the requirement, so that the system is fast and efficient to use, and the complexity of deployment is greatly reduced.
Embodiment one: the application discloses a battery safety monitoring method.
Specifically, referring to fig. 2, a battery safety monitoring method disclosed in the present embodiment includes the following steps:
step 201: disposing a sensing device on the positive and negative electrode surfaces of all battery cells in the battery pack;
in the method described in this embodiment, as an alternative method, the sensing device is arranged on the positive and negative electrode surfaces of the battery cell to be monitored with an adhesive tape (i.e., an insulating heat-conducting adhesive film) on the surface thereof. And meanwhile, the signal acquisition and processing device is fixed at a proper position, and the sensing device is connected with the signal acquisition and processing device through mutually-adaptive interfaces.
Step 202: modulating the detection laser into a plurality of groups of pulse light with different frequency shifts, and transmitting the pulse light into the sensing device;
in the method described in this embodiment, as an alternative method, a beam of detection laser light is first emitted by using a laser light source in a laser signal emitting module of the signal acquisition processing apparatus. The detection laser can be modulated into eight sets of pulse light of different frequency shifts by eight acousto-optic modulators, and then the eight sets of pulse light are injected into eight sets of optical fiber pairs in the sensing device.
In the method of this embodiment, the eight groups of pulse lights and the eight groups of optical fiber pairs are examples that are convenient for understanding, and in the actual operation process, the number of the pulse lights and the optical fiber pairs is not specifically limited, so that the sensing device can receive the pulse lights and the optical fiber pairs.
Step 203: receiving a plurality of groups of optical signals returned by the pulse light through the sensing device;
in the method described in this embodiment, the optical signals entering the sensing device are propagated in different optical fibers, and the returned optical signals are received by the signal receiving module in the signal acquisition processing device.
Step 204: and analyzing the optical signal to obtain temperature information and strain information of the environment where the sensing device is located.
In the method described in this embodiment, as an alternative method, the signal receiving module transmits the received optical signals to the raman thermometry portion and the brillouin strain detection portion in the signal processing analysis module, respectively. The Raman temperature measurement part can analyze the temperature information of the environment where the whole reticular optical fiber sensing structure is located, the Brillouin strain detection part can analyze the strain information of the environment where the whole reticular optical fiber sensing structure is located, and finally the signal processing analysis module combines the temperature information, the strain information and the corresponding specific position information together.
In the method described in this embodiment, as an alternative method, when the signal processing analysis module determines that the temperature information and the strain information are abnormal, early warning information is sent in real time, so as to remind a maintenance person to repair or replace the battery. The early warning information comprises temperature information, strain information and fault position information, the forms of the early warning information can be words, voices or indicator lamps, the specific form of the early warning information is not limited, and maintenance personnel can know the fault of the battery.
As an optional method, the temperature information and the strain information can be uploaded to the cloud or mobile terminal equipment for storage through a WiFi communication module in the signal acquisition and processing device, so that maintenance personnel can inquire the historical state of the battery.
Based on the battery safety monitoring method disclosed in the above embodiment, the present application also provides another battery safety monitoring method, which is different from the first embodiment in that the signal acquisition and processing device is not fixed as a whole with the battery pack, but only the sheet-shaped heat conducting material is deployed on the positive and negative electrode surfaces of the battery core in the battery pack, and when the battery needs to be monitored safely, the signal acquisition and processing device is connected to perform corresponding temperature and strain monitoring work. The method aims at the lithium battery which does not need to be monitored safely in real time and only needs to be monitored and maintained regularly in actual life production. Therefore, the signal acquisition processing device is designed to be a detachable and independent device, so that the safety monitoring device can be used for monitoring the conditions of temperature, strain and the like of the lithium battery in real time and can be applied to a scene of safely monitoring the battery only periodically.
In the method described in this embodiment, the mesh-like optical fiber sensing structure disposed in the sheet-like heat conductive material greatly increases the detection range and increases the temperature and strain sensitivity. In addition, when a fault occurs in an individual battery and abnormal heating occurs, the generated heat can be effectively dispersed through the sheet-shaped heat conducting material, so that the temperature rising speed is reduced, the safety of the battery is improved, and time is also striven for maintenance personnel to carry out rush repair. According to the method, the sensor module with low cost, convenience and rapidness can be deployed on the battery needing to be subjected to regular monitoring maintenance work, the signal acquisition processing module is connected to the maintenance point at regular intervals to monitor the temperature and the strain of the battery, the signal acquisition processing module with relatively high price does not need to be purchased, the cost of battery safety monitoring is greatly reduced, and meanwhile unnecessary waste of substances and human resources is reduced.
Based on the battery safety monitoring method disclosed in the above embodiment, the present embodiment correspondingly discloses a battery safety monitoring device. Referring to fig. 3, the battery safety monitoring device includes: an arrangement unit 301, a pulsed light emitting unit 302, an optical signal receiving unit 303, and an information analyzing unit 304;
the arrangement unit 301 is configured to arrange the sensing device on the positive and negative electrode surfaces of all battery cells in the battery pack;
the pulse light emitting unit 302 is configured to modulate the detection laser into a plurality of groups of pulse light with different frequency shifts, and emit the pulse light into the sensing device;
the optical signal receiving unit 303 is configured to receive a plurality of groups of optical signals returned by the pulse light through the sensing device;
the information analysis unit 304 is configured to analyze the optical signal to obtain temperature information and strain information of an environment where the sensing device is located.
Optionally, the apparatus further includes: and the early warning unit is used for sending out early warning information in real time when judging that the temperature information and the strain information are abnormal.
Optionally, the apparatus further includes: and the storage unit is used for uploading the temperature information and the strain information to the cloud or mobile terminal equipment for storage.
The embodiments in this specification are described in a progressive manner. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The features described in the embodiments of the present specification may be interchanged or combined to enable those skilled in the art to make or use the application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A battery safety monitoring system, comprising: the sensing device and the signal acquisition and processing device;
the sensing device and the signal acquisition and processing device are mutually independent and are connected through an interface;
the sensing device comprises two sheet-shaped heat conducting materials which are respectively covered on the positive electrode surfaces and the negative electrode surfaces of all battery cells in the battery pack; an insulating heat-conducting adhesive film is arranged on the surface of the heat-conducting material facing the battery core and is used for arranging the heat-conducting material on the surface of the positive electrode or the surface of the negative electrode of the battery core;
a plurality of groups of optical fiber pairs with net structures are arranged in the heat conducting material, and two optical fibers in the optical fiber pairs can be used for measuring temperature and strain; the optical fiber pairs are densely staggered in groups and distributed in the heat conducting material in a net structure;
the optical fiber pairs are densely staggered, and the whole surface of the heat conducting material facing the battery core is covered in a net shape;
the signal acquisition processing device is used for transmitting, receiving, processing and monitoring laser results.
2. The system of claim 1, wherein the thermally conductive material is provided with grooves on a surface facing the battery cells for arranging the optical fiber pairs.
3. The system of claim 1, wherein the interfaces at both ends of each of said fiber pairs on the same thermally conductive material are converged.
4. The system of claim 1, wherein the signal acquisition processing means comprises:
the laser signal transmitting module is used for transmitting detection laser;
the signal receiving module is used for receiving the optical signal returned by the sensing device;
the signal processing analysis module is used for analyzing the optical signals to obtain temperature information and strain information of the environment where the sensing device is located;
and the communication module is used for feeding back the information obtained by the signal processing and analyzing module to the outside.
5. The system of claim 4, wherein the laser signal emitting module comprises a plurality of groups of acousto-optic modulators for modulating the detection laser light into a plurality of groups of differently frequency shifted pulsed light and transmitting the pulsed light to the sensing device.
6. The system of claim 4, wherein the signal processing analysis module comprises a raman thermometry section and a brillouin strain detection section for obtaining the temperature information and the strain information, respectively.
7. A battery safety monitoring method applied to the system of any one of claims 1-6, the method comprising:
disposing a sensing device on the positive and negative electrode surfaces of all battery cells in the battery pack;
modulating the detection laser into a plurality of groups of pulse light with different frequency shifts, and transmitting the pulse light into the sensing device;
receiving a plurality of groups of optical signals returned by the pulse light through the sensing device;
and analyzing the optical signal to obtain temperature information and strain information of the environment where the sensing device is located.
8. A battery safety monitoring device for use in the system of any one of claims 1-6, said device comprising: an arrangement unit, a pulsed light emitting unit, an optical signal receiving unit, and an information analyzing unit;
the arrangement unit is used for arranging the sensing device on the positive and negative electrode surfaces of all battery cells in the battery pack;
the pulse light emitting unit is used for modulating the detection laser into a plurality of groups of pulse light with different frequency shifts and emitting the pulse light into the sensing device;
the optical signal receiving unit is used for receiving a plurality of groups of optical signals returned by the pulse light through the sensing device;
the information analysis unit is used for analyzing the optical signals to obtain temperature information and strain information of the environment where the sensing device is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311010960.1A CN116735029B (en) | 2023-08-09 | 2023-08-09 | Battery safety monitoring system, method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311010960.1A CN116735029B (en) | 2023-08-09 | 2023-08-09 | Battery safety monitoring system, method and device |
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