CN110987923A - Sensor for monitoring combustion fire of lithium ion battery - Google Patents
Sensor for monitoring combustion fire of lithium ion battery Download PDFInfo
- Publication number
- CN110987923A CN110987923A CN201911313215.8A CN201911313215A CN110987923A CN 110987923 A CN110987923 A CN 110987923A CN 201911313215 A CN201911313215 A CN 201911313215A CN 110987923 A CN110987923 A CN 110987923A
- Authority
- CN
- China
- Prior art keywords
- test paper
- sensor
- lithium ion
- ion battery
- hydrogen fluoride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 64
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 24
- 239000000779 smoke Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 229910021332 silicide Inorganic materials 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910004014 SiF4 Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910004074 SiF6 Inorganic materials 0.000 description 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007705 chemical test Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/80—Indicating pH value
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
Abstract
The invention relates to a sensor for monitoring combustion and ignition of a lithium ion battery, which comprises a shell and an audible and visual alarm, wherein the shell comprises a mounting base and an accommodating cavity, a plurality of ventilation openings are arranged on the side surface of the accommodating cavity, and the sensor further comprises: the base is arranged on the mounting base and is provided with a control system; the smoke gas sensors are arranged on the ventilation opening, are electrically connected to the control system and are used for detecting the smoke degree in the air; the hydrogen fluoride gas-sensitive test paper is used for detecting hydrogen fluoride in air and comprises pH test paper, test surfaces are arranged on the surface of the pH test paper at equal intervals, and silicides are uniformly paved on the test surfaces; and the detection mechanism is electrically connected to the control system and faces the first active rotating shaft and is used for detecting the color change of the pH test paper.
Description
Technical Field
The invention relates to the field of sensors, in particular to a sensor for monitoring combustion and ignition of a lithium ion battery.
Background
The sensor is a detection device which can sense the measured information and convert the sensed information into an electric signal or other information in a required form according to a certain rule to output so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.
Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. The electric automobile adopts the battery as an energy source, has the characteristics of energy conservation, environmental protection and the like, and is a new generation new energy power vehicle. Batteries used for electric vehicles include lead-acid batteries, nickel-metal hydride batteries, sodium-sulfur batteries, secondary lithium batteries, air batteries, lithium batteries, and the like. In particular, when a voltage is increased during charging of a lithium battery, the positive electrode and the negative electrode are in a very strong redox state, and thus the material is liable to be unstable. When the lithium battery is overcharged, incorrectly charged and discharged, and the like, the lithium battery is extremely easy to spontaneously combust. Spontaneous combustion of lithium batteries produces Hydrogen Fluoride (HF), sulfides, and the like.
The chemicals generated by lithium battery combustion are very likely to react with water vapor in the air, with the concomitant production of white smoke. The working principle of the traditional smoke sensor is as follows: the detection chamber is internally provided with a light emitting device and a light receiving device, and the light receiving device receives a certain amount of light emitted by the light emitting device under normal conditions; when smoke exists, the light emitted by the light emitting device is shielded by the smoke, so that the light received by the light receiving device is reduced, the photocurrent is reduced, and the detector sends out an alarm signal. Because electric automobile's the place of charging is mostly outdoor, if the white smoke that produces through the lithium cell burning passes through smoke transducer, smoke transducer sends the condition of police dispatch newspaper again and monitors whether the lithium cell catches fire, and such monitoring methods receives outdoor environment's interference very big, and under the circumstances such as the ambient environment is blown, the construction, is hazed, smoke transducer sends the warning easily, causes the erroneous judgement.
The invention aims to design a sensor for monitoring combustion and ignition of a lithium ion battery aiming at the problems in the prior art.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a sensor for monitoring ignition of a lithium ion battery, which can effectively solve the problems in the prior art.
The technical scheme of the invention is as follows:
the utility model provides a control sensor that lithium ion battery burning was on fire, contains casing and audible-visual annunciator, the casing contains the installation base and holds the chamber, the side that holds the chamber is provided with a plurality of vents, further contains:
the base is arranged on the mounting base and is provided with a control system;
the smoke gas sensors are arranged on the ventilation opening, are electrically connected to the control system and are used for detecting the smoke degree in the air;
the hydrogen fluoride gas-sensitive test paper is used for detecting hydrogen fluoride in air and comprises pH test paper, test surfaces are arranged on the surface of the pH test paper at equal intervals, and silicides are uniformly paved on the test surfaces;
and the detection mechanism is electrically connected to the control system and faces the first active rotating shaft and is used for detecting the color change of the pH test paper.
Further, the detection mechanism includes a color sensor.
Further, the detection mechanism further comprises a light emitting plate.
Further, the pH test paper is strip-shaped.
Further, one side of the pH test paper, which is provided with the test surface, is covered by a film in a sealing manner.
Further, the base is provided with passive pivot, first initiative pivot, second initiative pivot, first initiative pivot with second initiative pivot is through corresponding small-size motor drive, small-size motor passes through the control system drive.
Furthermore, the hydrogen fluoride gas-sensitive test paper is unreeled and arranged on the driven rotating shaft, the hydrogen fluoride gas-sensitive test paper is reeled and connected to the first driving rotating shaft, and the film is unreeled and reeled and connected to the second driving rotating shaft.
Further, the silicide is silicon dioxide.
Accordingly, the present invention provides the following effects and/or advantages:
1. according to the invention, silicide is laid on the pH test paper, and the silicide is very easy to react with hydrogen fluoride to generate fluosilicic acid and water, wherein the fluosilicic acid is a strong acid and can change the color of the pH test paper, and the principle is used for detecting whether hydrogen fluoride exists in the air, so that whether the lithium battery is burnt or not is judged, the identification is accurate, and the smoke interference in the air can be avoided.
2. The surface of the hydrogen fluoride sensitive test paper is covered by the film, the pH test paper and the silicide on the surface of the hydrogen fluoride sensitive test paper can be stored in a sealing way, through the arrangement of the active and passive rotating shafts, a part of the test surface of the hydrogen fluoride sensitive test paper can be exposed to the air when the hydrogen fluoride sensitive test paper is required to be used, only a small section of the test paper is used each time, the service life of the test paper can be effectively prolonged, and the defect that the traditional chemical test paper is invalid after being used once is avoided.
3. The light-emitting plate is arranged, so that light can be supplemented under the condition of dark light, and misjudgment caused by the fact that a detection mechanism cannot detect data is prevented.
4. According to the invention, through the matching of the smoke gas sensor and the hydrogen fluoride gas-sensitive test paper, the hydrogen fluoride gas-sensitive test paper is started only when the smoke gas sensor detects smoke, so that the service life of the hydrogen fluoride gas-sensitive test paper can be further prolonged.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the structure of the present invention.
Fig. 3 is a schematic structural diagram of a hydrogen fluoride gas-sensitive test paper.
Fig. 4 is a schematic diagram of the installation of the hydrogen fluoride gas sensitive test paper.
Detailed Description
To facilitate understanding of those skilled in the art, the structure of the present invention will now be described in further detail by way of examples in conjunction with the accompanying drawings:
referring to fig. 1-4, a sensor for monitoring ignition of a lithium ion battery comprises a housing and an audible and visual alarm (not shown), wherein the housing comprises a mounting base 1 and a containing cavity 12, a plurality of ventilation openings 13 are arranged on the side surface of the containing cavity 12, and the sensor further comprises:
the base 2 is arranged on the mounting base 1 and is provided with a control system;
a plurality of smoke sensors 3 arranged on the ventilation opening 13 and electrically connected to the control system for detecting the smoke degree in the air;
the base 2 is provided with a driven rotating shaft 43, a first driving rotating shaft 41 and a second driving rotating shaft 42, the first driving rotating shaft 41 and the second driving rotating shaft 42 are driven by corresponding small motors 44, and the small motors 44 are driven by the control system;
the hydrogen fluoride gas-sensitive test paper 5 is used for detecting hydrogen fluoride in air, the hydrogen fluoride gas-sensitive test paper comprises pH test paper, the pH test paper is strip-shaped, test surfaces 52 are arranged on the surfaces of the pH test paper at equal intervals, silicon dioxide is uniformly paved on the test surfaces 52, one surface of the pH test paper, which is provided with the test surfaces 52, is hermetically covered by a film 51, the hydrogen fluoride gas-sensitive test paper 5 is unreeled and arranged on the driven rotating shaft 43, the hydrogen fluoride gas-sensitive test paper 5 is reelingly connected to the first driving rotating shaft 41, and the film 51 is unreeled and reelingly connected to the second driving rotating shaft 42;
and the detection mechanism 6 is electrically connected to the control system and faces the first active rotating shaft 41, and is used for detecting the color change of the pH test paper. The detection mechanism 6 includes a color sensor 62 and a light emitting panel 61.
The control system, the smoke sensor 3, the pH test paper, and the color sensor 62 are all prior art and will not be described in detail herein.
The working principle is as follows: the control system receives a signal transmitted by the smoke gas sensor 3, when the smoke gas sensor 3 senses smoke, the control system starts the first driving rotating shaft 41 and the second driving rotating shaft 42 to rotate synchronously for a certain angle, the second driving rotating shaft 42 uncovers the film to expose the testing surface 52 of the hydrogen fluoride gas-sensitive test paper 5, meanwhile, the first driving rotating shaft 41 rotates the testing surface 52 to a position corresponding to the detection mechanism 6, and the detection mechanism 6 detects the color change of the pH test paper.
At this time, when the silicon dioxide on the test surface comes into contact with hydrogen fluoride in the air, the hydrogen fluoride reacts with the silicon dioxide to form gaseous silicon tetrafluoride: the SiF4 formed from SiO2(s) +4HF (aq) → SiF4(g) +2H2O (l) can continue to react with excess HF to form fluorosilicic acid: SiF4(g) +2hf (aq) ═ H2[ SiF6] (aq). Water and fluorosilicic acid are produced during this reaction, wherein fluorosilicic acid is a strong acid and is soluble in water. After the fluosilicic acid is contacted with the pH test paper, the pH test paper changes the color of the fluosilicic acid to the corresponding pH color, the detection mechanism 6 compares the color on the pH test paper with a preset color range, if the color falls into the preset color range, the existence of HF in the air is judged, and at the moment, the control system controls the audible and visual alarm to give an alarm.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides a control sensor that lithium ion battery burning was on fire, contains casing and audible-visual annunciator, the casing contains the installation base and holds the chamber, the side that holds the chamber is provided with a plurality of vents, its characterized in that: further comprising:
the base is arranged on the mounting base and is provided with a control system;
the smoke gas sensors are arranged on the ventilation opening, are electrically connected to the control system and are used for detecting the smoke degree in the air;
the hydrogen fluoride gas-sensitive test paper is used for detecting hydrogen fluoride in air and comprises pH test paper, test surfaces are arranged on the surface of the pH test paper at equal intervals, and silicides are uniformly paved on the test surfaces;
and the detection mechanism is electrically connected to the control system and faces the first active rotating shaft and is used for detecting the color change of the pH test paper.
2. A sensor for monitoring a lithium ion battery combustion fire according to claim 1, wherein: the detection mechanism includes a color sensor.
3. A sensor for monitoring a lithium ion battery combustion fire according to claim 2, wherein: the detection mechanism further comprises a light emitting plate.
4. A sensor for monitoring a lithium ion battery combustion fire according to claim 1, wherein: the pH test paper is strip-shaped.
5. The sensor for monitoring combustion ignition of a lithium ion battery according to claim 4, wherein: one side of the pH test paper, which is provided with the test surface, is covered by a film in a sealing manner.
6. The sensor for monitoring combustion ignition of a lithium ion battery according to claim 5, wherein: the base is provided with passive pivot, first initiative pivot, second initiative pivot, first initiative pivot with second initiative pivot is through corresponding small-size motor drive, small-size motor passes through the control system drive.
7. The sensor for monitoring combustion ignition of a lithium ion battery according to claim 6, wherein: the hydrogen fluoride gas-sensitive test paper is unreeled and arranged on the driven rotating shaft, the hydrogen fluoride gas-sensitive test paper is reeled and connected to the first driving rotating shaft, and the film is unreeled and reeled and connected to the second driving rotating shaft.
8. A sensor for monitoring a lithium ion battery combustion fire according to claim 1, wherein: the silicide is silicon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313215.8A CN110987923A (en) | 2019-12-19 | 2019-12-19 | Sensor for monitoring combustion fire of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313215.8A CN110987923A (en) | 2019-12-19 | 2019-12-19 | Sensor for monitoring combustion fire of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110987923A true CN110987923A (en) | 2020-04-10 |
Family
ID=70095934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911313215.8A Pending CN110987923A (en) | 2019-12-19 | 2019-12-19 | Sensor for monitoring combustion fire of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110987923A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993006480A1 (en) * | 1991-09-17 | 1993-04-01 | Exxon Research And Engineering Company | Hydrogen fluoride sensor |
| DE10000412A1 (en) * | 2000-01-07 | 2001-07-26 | Kremser Peter Fa | Smoke detector for fire alarm system has switching device for timed activation or de-activation of smoke detector or its alarm circuit |
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Application publication date: 20200410 |
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