CN208706012U - Battery fire early-warning system - Google Patents
Battery fire early-warning system Download PDFInfo
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- CN208706012U CN208706012U CN201821201601.9U CN201821201601U CN208706012U CN 208706012 U CN208706012 U CN 208706012U CN 201821201601 U CN201821201601 U CN 201821201601U CN 208706012 U CN208706012 U CN 208706012U
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Abstract
The application provides a kind of battery fire early-warning system, acquires the sound wave issued in the battery cell ejection process by the voice collection device, acoustic signals are transmitted to the arrangements for analyzing frequency.To, the arrangements for analyzing frequency carries out Fourier transformation to collected sound wave, and noise data is screened, is rejected, sophisticated signal is separated or is demodulated into the frequency sine wave different with amplitude, and will test the frequency characteristic of sound wave and amplitude response is delivered to the battery management system.The frequency characteristic for acquiring sound wave and amplitude response are compared the battery management system with the frequency characteristic of target sound waves and amplitude response.If the frequency distribution of target sound waves and distribution of amplitudes occur in the frequency and amplitude of collected sound wave, it is believed that there is the eruption phenomenon of the battery cell, the battery management system issues alarm of fire at this time.
Description
Technical field
This application involves lithium ion battery safety, more particularly to a kind of battery fire early-warning system.
Background technique
In recent years, the market share of electric car is promoted steadily.There is lithium ion battery high voltage, high-energy-density, length to follow
The excellent performances such as ring service life, no pollution to the environment by the highest attention of ev industry, and obtain certain application.So
And combustion mixture, such as H can be generated during lithium ion battery thermal runaway2、CO、CH4Deng, and accumulate in inside battery.In electricity
After reaching certain pressure boundary inside pond, safety valve is opened, and combustion mixture is discharged into external environment as battery erupts.
Since battery high-temperature surface and Mars temperature are much higher than the ignition temperature of gaseous state eruption, once eruption sprays
It contacts in air and with oxygen, Ignition Phenomena will easily occur, and cause fire.High temperature combustible and entrance after battery eruption
Also it is easy to appear dieselings after the air contact of inside battery.Lithium ion battery fire alarm method and system are often at present
The eruption phenomenon occurred using gas sensor or delay sensor detection battery.But since gas or smog are out of battery
Portion's eruption needs separated in time to flowing to sensor position and be detected by the sensors out, and the time and cabinet
Structure, the installation site of sensor, sensor sensitivity etc. are closely related, cause testing result occur postponing even wrong report or
Failing to report phenomenon.
Summary of the invention
Based on this, it is necessary to be easy to appear wrong report or leakage for current lithium ion battery fire alarm method and system
The problem of reporting phenomenon, provide it is a kind of quickly, the battery fire early-warning system for whether occurring erupting phenomenon accurately identified.
The application provides a kind of battery fire early-warning system, including battery modules shell, voice collection device, spectrum analysis
Device and battery management system.Multiple battery cells are provided in the battery modules shell.The voice collection device is set
The battery modules inner walls are placed in, to acquire the sound wave issued in the battery cell ejection process.The frequency spectrum point
The input terminal of analysis apparatus is connect with the voice collection device, to divide the collected sound wave of the voice collection device
Analysis processing.The output end of the arrangements for analyzing frequency is connect with the battery management system.
The voice collection device includes multiple noise transducers in one of the embodiments, is set to the battery
Module casing inner wall, and each noise transducer is connect with the input terminal of the arrangements for analyzing frequency.
Each noise transducer is set to each inner wall of the battery modules shell in one of the embodiments,
In the geometric center on surface, more comprehensively to acquire the sound wave issued in the battery cell ejection process.
The battery fire early-warning system further includes multiple safety valves in one of the embodiments, each safety
Valve is set to the gas outlet of each battery cell, the inner wall top surface phase of multiple safety valves and the battery modules shell
It is right.
The noise transducer is set to where the central point line of multiple safety valves in one of the embodiments,
On the vertical plane intersection of plane and the inner wall top surface.
The noise transducer is set to the inner wall side of the battery modules shell in one of the embodiments, and
It is arranged close to the inner wall top surface.
The noise transducer is set to each battery cell surface in one of the embodiments, and close to institute
State safety valve setting.
The noise transducer is set to the inner wall top surface of the battery modules shell in one of the embodiments,
Corner position.
The battery management system includes control unit and detection unit in one of the embodiments,.The frequency spectrum
The output end of analytical equipment is connect with the input terminal of the detection unit, the output end and described control unit of the detection unit
Connection.
The battery fire early-warning system further includes extinguishing device in one of the embodiments, the extinguishing device with
Described control unit connection.
In battery ejection process, the mutual friction of the phases such as air-flow and exit wall surface, surrounding air and collision and cause to vibrate,
And then causes air vibration and make a sound.Wherein, the injection pressure, jet velocity, nozzle configuration of the sound and air-flow of generation,
Body structure etc. is closely related, has and is different from the unique feature of other sound.By described in voice collection device acquisition
Acoustic signals are transmitted to the arrangements for analyzing frequency by the sound wave issued in battery cell ejection process.To the frequency spectrum point
Analysis apparatus carries out Fourier transformation to collected sound wave, and is screened, rejected to noise data, by sophisticated signal
The frequency sine wave different with amplitude is separated or be demodulated into, and will test the frequency characteristic of sound wave and amplitude response is delivered to institute
State battery management system.
The battery management system by acquire sound wave frequency characteristic and amplitude response and target sound waves frequency characteristic and
Amplitude response is compared.If there is the frequency distribution of target sound waves and amplitude point in the frequency and amplitude of collected sound wave
Cloth, then it is believed that there is the eruption phenomenon of the battery cell, the battery management system issues alarm of fire at this time.
Detailed description of the invention
Fig. 1 is battery fire early-warning system theory structure schematic diagram provided by the present application；
Fig. 2 is the noise transducer scheme of installation of battery fire early-warning system structure provided by the present application；
Fig. 3 is the concrete structure schematic diagram of battery fire early-warning system structure provided by the present application；
Fig. 4 is the side signal of the mounting structure of one embodiment of battery fire early-warning system structure provided by the present application
Figure；
Fig. 5 is the mounting structure schematic diagram of one embodiment of battery fire early-warning system structure provided by the present application；
Fig. 6 is the plan structure of the mounting structure of one embodiment of battery fire early-warning system structure provided by the present application
Schematic diagram；
Fig. 7 is the side view structure of the mounting structure of one embodiment of battery fire early-warning system structure provided by the present application
Schematic diagram；
Fig. 8 is the plan structure of the mounting structure of one embodiment of battery fire early-warning system structure provided by the present application
Schematic diagram；
Fig. 9 is the mounting structure schematic diagram of one embodiment of battery fire early-warning system structure provided by the present application.
Description of symbols
Battery fire early-warning system 100, battery modules shell 10, battery cell 101, voice collection device 20, frequency spectrum point
Analysis apparatus 50, battery management system 30, noise transducer 210, safety valve 102, inner wall top surface 103, control unit 310, detection
Unit 320, extinguishing device 40.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, by the following examples, and combine attached
Figure, is further elaborated the application.It should be appreciated that specific embodiment described herein is only to explain this Shen
Please, it is not used to limit the application.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).In the description of the present application, it is to be understood that term " on ", "lower", "front", "rear", " left side ",
The orientation of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " or position are closed
System indicates to be based on the orientation or positional relationship shown in the drawings, being merely for convenience of description the application and simplifying description
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the application.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Referring to Figure 1, it includes that battery modules shell 10, sound are adopted that the application, which provides a kind of battery fire early-warning system 100,
Acquisition means 20, arrangements for analyzing frequency 50 and battery management system 30.Multiple batteries are provided in the battery modules shell 10
Monomer 101.The voice collection device 20 is set to 10 inner wall of battery modules shell, to acquire the battery cell
The sound wave issued in 101 ejection process.The input terminal of the arrangements for analyzing frequency 50 is connect with the voice collection device 20, is used
To be analyzed and processed to the collected sound wave of the voice collection device 20.The output end of the arrangements for analyzing frequency 50 and institute
State the connection of battery management system 30.
In battery ejection process, the mutual friction of the phases such as air-flow and exit wall surface, surrounding air and collision and cause to vibrate,
And then causes air vibration and make a sound.Wherein, the injection pressure, jet velocity, nozzle configuration of the sound and air-flow of generation,
Body structure etc. is closely related, has and is different from the unique feature of other sound.Institute is acquired by the voice collection device 20
The sound wave issued in 101 ejection process of battery cell is stated, acoustic signals are transmitted to the arrangements for analyzing frequency 50.To institute
It states arrangements for analyzing frequency 50 and Fourier transformation is carried out to collected sound wave, and noise data screened, is rejected,
Sophisticated signal is separated or is demodulated into the frequency sine wave different with amplitude, and will test frequency characteristic and the amplitude spy of sound wave
Property is delivered to the battery management system 30.
The battery management system 30 will acquire the frequency characteristic of the frequency characteristic and amplitude response and target sound waves of sound wave
It is compared with amplitude response.If there is the frequency distribution of target sound waves and amplitude point in the frequency and amplitude of collected sound wave
Cloth, then it is believed that there is the eruption phenomenon of the battery cell 101, it is alert to issue fire for the battery management system 30 at this time
Report.
Fig. 2-3 is referred to, in one embodiment, the voice collection device 20 includes multiple noise transducers 210, more
A noise transducer 210 is set to 10 inner wall of battery modules shell, and each noise transducer 210 with it is described
The input terminal of arrangements for analyzing frequency 50 connects.
A condenser type Electret condenser microphone to sound sensitive built in the noise transducer 210, collected sound wave make
Electret film vibration in microphone, leads to the variation of capacitor, and generates the small voltage for variation of being corresponding to it, thus realization sound
Transformation of the sound signal to electric signal.The one kind of sound as wave, frequency and amplitude are just at the important attribute of description sound wave.Amplitude
Bigger loudness is bigger, and frequency more high-pitched tone is higher.Another of sound is characterized in tone color, refers to that the frequency of different sound is shown
Always there is distinguished characteristic in terms of waveform.Different sounding bodies is since its material, structure are different, then the sound of the sound issued
Color is also different.
It, can be from different directions by the way that multiple noise transducers 210 are arranged in 10 inner wall of battery modules shell
The phenomenon that being monitored, avoiding missing inspection.
In one embodiment, each noise transducer 210 is set in each of described battery modules shell 10
In the geometric center of wall surface, more comprehensively to acquire the sound wave issued in 101 ejection process of battery cell.
The shape of the battery modules shell 10 can be the shapes such as cuboid, square, cylindrical body with no restrictions, will
Each noise transducer 210 is set in the geometric center of each inner wall surface of the battery modules shell 10, can be with
The sound wave issued from comprehensive comprehensive one or more 101 ejection process of battery cell of capture.
Fig. 4-5 is referred to, in one embodiment, the noise transducer 210 is set to the battery modules shell 10
Inner wall side 104, and close to the inner wall top surface 103 be arranged.
Multiple battery cells 101 in the battery modules shell 10 are often to be arranged side by side.In the peace
The center of full valve 102 can connect in alignment, be plane an a, the plane a and the safety valve by the straight line
102 places surface are parallel, the 102 place surface of safety valve and the battery modules shell 10 close to the safety valve 102
Inner wall surface forms a closed cuboid or hexahedron.Wherein, four face b and plane a are vertical, and each face b belongs to described
A part of inner wall side 104, plane a is parallel with the inner wall top surface 103, and has a certain distance.Wherein, plane a be for
The virtual plane of the better confirmation safety valve 102 installation site setting.One institute is installed at the center of a plane b
Noise transducer 210 is stated, the noise transducer 210, i.e. phase can also be respectively installed at the center of two adjacent face b
Pair two face b in a noise transducer 210 is only installed on a face b wherein.
Fig. 6 is referred to, in one embodiment, the battery fire early-warning system 100 further includes multiple safety valves 102,
Each safety valve 102 is set to the gas outlet of each battery cell 101, multiple safety valves 102 and the electricity
The inner wall top surface 103 of pond module casing 10 is opposite.
In one embodiment, the noise transducer 210 is set to the central point line institute of multiple safety valves 102
On the vertical plane intersection of plane Yu the inner wall top surface 103.
The plane where the central point line of multiple safety valves 102 is vertical with the inner wall top surface 103, at this point, hanging down
It faces that there are an intersecting straight lines with the inner wall top surface 103 directly, the noise transducer 210 is set at the intersecting lens,
Multiple safety valves 102 can be monitored.The central point of the safety valve 102 can connect it is into a line, such as dotted line in Fig. 6
At position.
Fig. 7-8 is referred to, in one embodiment, the noise transducer 210 is set to the battery modules shell 10
The inner wall top surface 103 corner position.
Further, in order to reduce cost, 210 installation site of noise transducer is in the battery modules shell 10
Vertex.
In one embodiment, the battery management system 30 includes control unit 310 and detection unit 320.It is described
The output end of arrangements for analyzing frequency 50 is connect with the input terminal of the detection unit 320, the output end of the detection unit 320 with
Described control unit 310 connects.
In battery ejection process, air-flow is from eruption inside one or more battery cells 101 to outside batteries mistake
Jet noise is generated in journey, the reason is that the mutual friction of the phases such as air-flow and exit wall surface, surrounding air and collision and cause to shake
It is dynamic, and then cause air vibration and make a sound.
The sound wave issued in 101 ejection process of battery cell is acquired by the voice collection device 20, by sound wave
Signal is transmitted to the arrangements for analyzing frequency 50.To which the arrangements for analyzing frequency 50 carries out Fourier to collected sound wave
Transformation, and noise data is screened, is rejected, by sophisticated signal separate or be demodulated into frequency with amplitude it is different just
String wave, and will test the frequency characteristic of sound wave and amplitude response is delivered to the detection unit 320.The detection unit 320
The frequency characteristic for acquiring sound wave and amplitude response are compared with the frequency characteristic of target sound waves and amplitude response.If acquisition
To sound wave frequency and amplitude there is the frequency distribution of target sound waves and distribution of amplitudes, then it is believed that there is the battery list
The eruption phenomenon of body 101, described control unit 310 issues alarm of fire at this time.
In one embodiment, the battery fire early-warning system 100 further includes extinguishing device 40.The extinguishing device 40
It is connect with described control unit 310.
After described control unit 310 issues alarm of fire, in driving situation, described control unit 310 is alarmed to vehicle, whole
Vehicle may power off (according to travel situations), and battery is just exported without electric current.In charging situation, propose to alarm to charger, charging
Machine stops charging, and the battery management system 30 itself can also cut off electric current.The battery management system 30 is according to safe feelings
Condition controls the extinguishing device 40 and puts out a fire.
Fig. 9 is referred to, in one embodiment, the noise transducer 210 is set to each 101 table of the battery cell
Face, and be arranged close to the safety valve 102.
In one embodiment, the arrangements for analyzing frequency 50 is spectrum analyzer.
In one embodiment, a kind of battery fire alarm method, applied to any of the above-described battery fire alarm
System 100, comprising:
S10 is sent out in one or more 101 ejection process of battery cell of acquisition according to the voice collection device 20
Sound wave out；
S20 obtains the sound wave pair according to the sound wave issued in one or more 101 ejection process of battery cell
The frequency characteristic and amplitude response answered；And
S30 compares the frequency characteristic and amplitude response of the frequency characteristic and amplitude response and target sound waves, if
There is the frequency characteristic of target sound waves and amplitude response in the corresponding frequency characteristic of the sound wave and amplitude response, then it is pre- to issue fire
Alert signal.
By determining the frequency distribution of the jet noise in battery ejection process in mute laboratory, observing it is with low
Based on frequency, or based on medium, high frequency and the distribution of ratio shared by three, and its frequency is observed with the variation of course of injection
Rule, to obtain target frequency characteristic.
Table is divided according to the frequency spectrum that Institute of Electrical and Electronics Engineers (IEEE) is formulated, Frequency is 30~300kHz,
IF frequency is 300~3000kHz, and higher frequency is 3~30MHz, and frequency range is very high frequency(VHF) in 30~300MHz,
300~1000MHz is superfrequency.Relative to low frequency signal, high-frequency signal variation is very fast, has mutation；Low frequency signal variation
Slowly, waveform is smooth.Due to being that just will appear eruption phenomenon after inside battery runs up to certain pressure, so when starting injection
Rate is very fast, and gradually decreases, therefore its corresponding frequency and aperiodicity change.Emphasis monitoring is making an uproar for battery eruption moment
The frequency and distribution of amplitudes of sound can capture coherent signal and timely when battery has just occurred and erupted phenomenon in this way
Issue fire alarm.
Battery cell in one battery modules is split, and only retains one of them, and will only include a battery list
The battery modules cabinet of body is placed in mute laboratory.Pass through certain abuse route such as electricity abuse, heat abuse, mechanical abuse
There is eruption phenomenon Deng triggering battery, and its frequency characteristic and amplitude response are obtained by spectrum analysis.It, can by many experiments
To obtain in battery ejection process, general target frequency characteristic and amplitude response observe its distribution of amplitudes with course of injection
Changing rule, to obtain the various possibilities of target frequency characteristic and amplitude response.To extract special when battery cell eruption
Sign frequency and signature amplitude as judge battery whether occur eruption phenomenon foundation, that is, target sound waves frequency characteristic with
Amplitude response.
The corresponding frequency characteristic of the sound wave and amplitude response and target frequency characteristic and target amplitude characteristic that will acquire
It is compared, if the corresponding frequency characteristic of the sound wave and amplitude response of middle acquisition contain target frequency characteristic and target
Amplitude response then can determine whether that there are one or more battery cells 101 has occurred eruption phenomenon, and it is pre- to issue fire at this time
Alert signal.Otherwise, then it is assumed that there is no erupting phenomenon.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application the scope of the patents therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the concept of this application, various modifications and improvements can be made, these belong to the guarantor of the application
Protect range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of battery fire early-warning system characterized by comprising
Battery modules shell (10), the battery modules shell (10) is interior to be provided with multiple battery cells (101)；
Voice collection device (20) is set to battery modules shell (10) inner wall, to acquire the battery cell (101)
The sound wave issued in ejection process；
The input terminal of arrangements for analyzing frequency (50), the arrangements for analyzing frequency (50) is connect with the voice collection device (20),
To be analyzed and processed to the voice collection device (20) collected sound wave；And
The output end of battery management system (30), the arrangements for analyzing frequency (50) is connect with the battery management system (30).
2. battery fire early-warning system as described in claim 1, which is characterized in that the voice collection device (20) includes more
A noise transducer (210), and each noise transducer (210) and the input terminal of the arrangements for analyzing frequency (50) connect
It connects.
3. battery fire early-warning system as claimed in claim 2, which is characterized in that each noise transducer (210) sets
It is placed in the geometric center of each inner wall surface of the battery modules shell (10), more comprehensively to acquire the battery
The sound wave issued in monomer (101) ejection process.
4. battery fire early-warning system as claimed in claim 2, which is characterized in that further include multiple safety valves (102), each
The safety valve (102) is set to the gas outlet of each battery cell (101), multiple safety valves (102) with it is described
The inner wall top surface (103) of battery modules shell (10) is opposite.
5. battery fire early-warning system as claimed in claim 4, which is characterized in that the noise transducer (210) is set to
Where the central point line of multiple safety valves (102) on the vertical plane intersection of plane and the inner wall top surface (103).
6. battery fire early-warning system as claimed in claim 4, which is characterized in that the noise transducer (210) is set to
The inner wall side (104) of the battery modules shell (10), and be arranged close to the inner wall top surface (103).
7. battery fire early-warning system as claimed in claim 4, which is characterized in that the noise transducer (210) is set to
The each battery cell (101) surface, and be arranged close to the safety valve (102).
8. battery fire early-warning system as claimed in claim 4, which is characterized in that the noise transducer (210) is set to
The corner position of the inner wall top surface (103) of the battery modules shell (10).
9. battery fire early-warning system as claimed in claim 2, which is characterized in that the battery management system (30) includes:
Control unit (310)；And
Detection unit (320), the output end of the arrangements for analyzing frequency (50) and the input terminal of the detection unit (320) connect
It connects, the output end of the detection unit (320) is connect with described control unit (310).
10. battery fire early-warning system as claimed in claim 9, which is characterized in that it further include extinguishing device (40), it is described to go out
Fiery device (40) connect with described control unit (310).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821201601.9U CN208706012U (en) | 2018-07-27 | 2018-07-27 | Battery fire early-warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821201601.9U CN208706012U (en) | 2018-07-27 | 2018-07-27 | Battery fire early-warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208706012U true CN208706012U (en) | 2019-04-05 |
Family
ID=65940747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201821201601.9U Active CN208706012U (en) | 2018-07-27 | 2018-07-27 | Battery fire early-warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208706012U (en) |
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2018
- 2018-07-27 CN CN201821201601.9U patent/CN208706012U/en active Active
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