CN211123183U - Lithium battery thermal safety monitoring system based on optical fiber detection technology - Google Patents
Lithium battery thermal safety monitoring system based on optical fiber detection technology Download PDFInfo
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- CN211123183U CN211123183U CN201921720801.XU CN201921720801U CN211123183U CN 211123183 U CN211123183 U CN 211123183U CN 201921720801 U CN201921720801 U CN 201921720801U CN 211123183 U CN211123183 U CN 211123183U
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- optical fiber
- lithium battery
- temperature measuring
- storage box
- measuring optical
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Abstract
The utility model discloses a lithium cell thermal safety monitored control system based on optical fiber detection technique, include: the storage box is used for placing the lithium battery therein, and flame retardant liquid is filled in the storage box and is in contact with the lithium battery; a light source; one end of the temperature measuring optical fiber is connected to the light source, and the other end of the temperature measuring optical fiber extends along the battery wall of the lithium battery in the storage box; the analysis controller is coupled to the other end, opposite to the light source, of the temperature measuring optical fiber, and is used for receiving the test light output by the temperature measuring optical fiber, demodulating temperature data and outputting a corresponding control signal according to the temperature data; and the cooling device is coupled to the analysis controller and is also arranged on the box edge of the storage box so as to receive the control signal output by the analysis controller and then spray the coolant onto the lithium battery in the storage box. The utility model discloses a hot safety monitoring system of lithium cell based on optical fiber detection technique, through the setting of temperature measurement optic fibre, alright effectual realization has detected the temperature of lithium cell.
Description
Technical Field
The utility model relates to a monitored control system, more specifically the hot safety monitoring system of lithium cell based on optical fiber detection technique that says so relates to.
Background
In the new energy era, lithium batteries are widely applied in the fields of automobiles and aviation. As a power lithium battery box, it is usually formed by thousands of single batteries, and the safety thereof is increasingly valued by manufacturers and users. In the existing battery thermal safety management system, a temperature sensor on the surface of a battery is generally utilized to perform sampling point measurement monitoring on a lithium battery pack, the method is difficult to realize accurate measurement and rapid positioning of thousands of single batteries in the battery pack, and the method needs a large number of temperature sensors, so that the manufacturing cost is increased, and the redundancy of a detection system is complex. In view of the above, it is necessary to provide a lithium battery thermal safety monitoring system based on optical fiber detection technology to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a hot safety monitoring system of lithium cell based on optic fibre detection technique can realize the accurate measurement and the quick location of thousands of battery cells in the battery package to combine fire-retardant insulating oil to the restraint parcel effect of lithium cell thermal runaway, can prevent the emergence of further explosion or conflagration, improve the security in the battery module use.
In order to achieve the above purpose, the utility model provides a following technical scheme: a lithium battery thermal safety monitoring system based on an optical fiber detection technology comprises:
the storage box is used for placing the lithium battery therein, and flame retardant liquid is filled in the storage box and is in contact with the lithium battery;
the light source is used for emitting test light;
one end of the temperature measuring optical fiber is connected to the light source to receive the test light emitted by the light source and penetrates out of the end part of the temperature measuring optical fiber after penetrating through the temperature measuring optical fiber, and the other end of the temperature measuring optical fiber extends along the battery wall of the lithium battery in the storage box so that the side wall of the temperature measuring optical fiber is attached to the battery wall of the lithium battery;
the analysis controller is coupled to the other end, opposite to the light source, of the temperature measuring optical fiber, and is used for receiving the test light output by the temperature measuring optical fiber, demodulating temperature data and outputting a corresponding control signal according to the temperature data;
and the cooling device is coupled to the analysis controller and is also arranged on the box edge of the storage box so as to receive the control signal output by the analysis controller and then spray the coolant onto the lithium battery in the storage box.
As the utility model discloses a further improvement, the light source includes laser source and treater, the laser source is coupled with the treater to output laser light source to the treater in, the treater is connected with temperature measurement optic fibre, in order to carry out the raman scattering with laser light source after as temperature measurement light input temperature measurement optic fibre.
As a further improvement of the present invention, the analysis controller includes:
the warning module is used for sending warning information;
the demodulator is connected to the end part of the temperature measuring optical fiber and used for receiving the temperature measuring light output by the temperature measuring optical fiber and demodulating and outputting temperature data;
and the control analysis module is coupled with the demodulator and the warning module and is also coupled with the cooling device to receive the temperature data output by the demodulator, analyze and calculate the temperature data and output a corresponding control signal to the cooling device so as to drive the cooling device to spray the coolant to the heating lithium battery.
As a further improvement, the cooling device includes driving pump and coolant pool and removal shower nozzle, the setting that removes the shower nozzle and can slide is on the box edge of case, the one end of driving pump is connected to the coolant pool, and the other end is connected to and removes the shower nozzle, and this driving pump still is coupled in control analysis module to the action is absorbed and is poured into after the coolant in the coolant pool and remove in the shower nozzle behind the control signal of receiving control analysis module output.
As a further improvement, when the lithium battery in the storage box is a single lithium battery, the temperature measuring optical fiber is wound on the lithium battery.
As a further improvement, when the lithium battery in the storage box is a single-row lithium battery, the temperature measuring optical fiber is wound on each lithium battery one by one.
As a further improvement, when the lithium batteries in the storage box are battery modules, the temperature measuring optical fiber passes between the two rows of lithium batteries.
The utility model has the advantages that the optical fiber sensor has the unique advantages of small volume, corrosion resistance, high accuracy, good real-time performance and the like, has high sensitivity compared with the traditional physical sensor, very short response time and very good anti-electromagnetic and anti-interference capability;
the problem that the temperature of a single battery cannot be monitored in real time when a lithium battery module is used is effectively solved, a temperature measuring optical fiber is used for measuring the temperature of a plurality of lithium batteries of the battery module in a surrounding manner, so that the real-time measurement and positioning of the temperature of the plurality of single batteries of the battery module can be met, and the complexity and the redundancy degree of a monitoring system can be reduced;
the whole battery pack system is fixed in flame-retardant insulating hydraulic oil, and experiments prove that the hydraulic oil has wrapping property and inhibitive property on battery thermal runaway fire, and meanwhile, the battery pack system also has the characteristics of cooling, insulation, heat conduction and the like. The lithium battery with thermal disasters covers the flame in a short moment, so that the propagation of thermal runaway of peripheral batteries is prevented.
Drawings
FIG. 1 is a schematic diagram of a lithium battery thermal safety monitoring system;
FIG. 2 is a schematic view of a single cell fiber arrangement;
FIG. 3 is a schematic view of a single row arrangement of optical fibers for a battery;
fig. 4 is a schematic diagram of arrangement of optical fibers for battery module arrangement.
Detailed Description
The present invention will be described in further detail with reference to embodiments shown in the drawings.
Referring to fig. 1, a lithium battery thermal safety monitoring system based on an optical fiber detection technology in this embodiment includes:
the storage box 1 is used for placing a lithium battery therein, and the storage box 1 is filled with a flame retardant liquid which is in contact with the lithium battery;
the light source 2 is used for emitting test light;
one end of the temperature measuring optical fiber 3 is connected to the light source 2 to receive the test light emitted by the light source and penetrates out of the end part of the temperature measuring optical fiber 3 after penetrating through the temperature measuring optical fiber 3, and the other end of the temperature measuring optical fiber 3 extends along the battery wall of the lithium battery in the storage box 1 so that the side wall of the temperature measuring optical fiber 3 is attached to the battery wall of the lithium battery;
the analysis controller 4 is coupled to the other end of the temperature measuring optical fiber 3 opposite to the light source 2, and is used for receiving the test light output by the temperature measuring optical fiber 3, demodulating temperature data and outputting a corresponding control signal according to the temperature data;
the cooling device 5 is coupled to the analysis controller 4 and is also arranged on the box edge of the storage box 1 to receive the control signal output by the analysis controller 4 and then spray the coolant to the lithium battery in the storage box 1, in the process of monitoring the lithium battery by using the monitoring system of the embodiment, the temperature of the current lithium battery is detected in real time by the temperature measuring optical fiber 3, the lithium battery thermal runaway is restrained and wrapped by the flame retardant liquid, the fire spraying behavior of the lithium battery thermal runaway can be effectively controlled, the temperature of the spraying position is reduced, the safety of the battery module in use is improved, the temperature of the lithium battery can be effectively detected by the testing light output by the light source 2 through the arrangement of the temperature measuring optical fiber 3, then the cooling device 5 is timely and effectively controlled to spray the coolant to the high-temperature lithium battery through the analysis function of the analysis controller 4, the effect of supervision is carried out to the lithium cell to effectual realization one like this.
As an improved specific embodiment, the light source 2 includes a laser source 21 and a processor 22, the laser source 21 is coupled to the processor 22 to output a laser source into the processor 22, the processor 22 is connected to the temperature measuring fiber 3 to input the laser source into the temperature measuring fiber 3 as a temperature measuring light after raman scattering, and the temperature measuring light for detecting temperature can be effectively emitted through cooperation of the laser source 21 and the processor 22, so that temperature can be effectively measured through the temperature measuring fiber 3.
As a specific embodiment of the improvement, the analysis controller 4 includes:
an alert module 41 for sending alert information;
the demodulator 42 is connected to the end part of the temperature measuring optical fiber 3 to receive the temperature measuring light output by the temperature measuring optical fiber 3 and demodulate and output temperature data;
a control analysis module 43, coupled to the demodulator 42 and the warning module 41, and further coupled to the cooling device 5, for receiving the temperature data output by the demodulator 42, analyzing and calculating the temperature data, and outputting a corresponding control signal to the cooling device 5, so as to drive the cooling device 5 to spray a coolant onto a heat-generating lithium battery, where the demodulator 42 converts an optical signal into an electrical signal and feeds the electrical signal back to the control analysis module 43, so as to determine whether the real-time temperature of the single battery is normal; the control analysis module 43 pushes the real-time temperature and the positioning information of the abnormal battery monomer, and starts the cooling device 5 to spray the coolant to cool the abnormal battery, so as to prevent the thermal disaster from further expanding; at the same time, the alarm module 41 issues an alarm.
As a modified specific embodiment, the cooling device 5 includes a driving pump 51, a coolant pool 52 and a mobile spray head, the mobile spray head is slidably disposed on the side of the storage box 1, one end of the driving pump 51 is connected to the coolant pool 52, the other end is connected to the mobile spray head, the driving pump 51 is further coupled to the control analysis module 43, so as to receive the control signal output by the control analysis module 43 and then act to suck the coolant in the coolant pool 52 and inject the coolant into the mobile spray head, the spray head in this embodiment is an existing motor mobile spray head, the mobile effect of the spray head is achieved by disposing a guide rail on the side of the storage box 1 and then slidably disposing the mobile spray head on the guide rail, so that the effect of spraying the coolant onto the corresponding heat-generating lithium battery can be achieved.
As an improved specific embodiment, referring to fig. 2, when the lithium batteries in the storage box 1 are single lithium batteries, the temperature measuring optical fiber 3 is wound on the lithium batteries, referring to fig. 3, when the lithium batteries in the storage box 1 are single-row lithium batteries, the temperature measuring optical fiber 3 is wound on each lithium battery one by one, referring to fig. 4, when the lithium batteries in the storage box 1 are battery modules, the temperature measuring optical fiber 3 passes through between two rows of lithium batteries, the above-mentioned winding connection mode of the temperature measuring optical fiber 3, the optical fiber surrounds the surface of the soft-package lithium batteries, and the optical fiber longitudinal interval is L =15 mm.
In conclusion, the monitoring system of the embodiment has the unique advantages of small size, corrosion resistance, high accuracy, good real-time performance and the like, and has high sensitivity, very short response time and very good electromagnetic resistance and anti-interference capability compared with the traditional physical sensor; the problem that the temperature of a single battery cannot be monitored in real time when a lithium battery module is used is effectively solved, and the temperature of a plurality of lithium batteries of the battery module is measured in a surrounding manner by using one temperature measuring optical fiber 3, so that the real-time measurement and positioning of the temperature of the plurality of single batteries of the battery module can be met, and the complexity and the redundancy degree of a monitoring system can be reduced; the whole battery pack system is fixed in flame-retardant insulating hydraulic oil, and experiments prove that the hydraulic oil has wrapping property and inhibitive property on battery thermal runaway fire, and meanwhile, the battery pack system also has the characteristics of cooling, insulation, heat conduction and the like. The lithium battery with thermal disasters covers the flame in a short moment, so that the propagation of thermal runaway of peripheral batteries is prevented.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a lithium cell thermal safety monitored control system based on optical fiber detection technique which characterized in that: the method comprises the following steps:
the storage box (1) is used for placing the lithium battery therein, and flame retardant liquid is filled in the storage box (1) and is in contact with the lithium battery;
a light source (2) for emitting test light;
one end of the temperature measuring optical fiber (3) is connected to the light source (2) to receive the test light emitted by the light source and penetrate out of the end part of the temperature measuring optical fiber (3) after penetrating through the temperature measuring optical fiber (3), and the other end of the temperature measuring optical fiber (3) extends along the battery wall of the lithium battery in the storage box (1) so that the side wall of the temperature measuring optical fiber (3) is attached to the battery wall of the lithium battery;
the analysis controller (4) is coupled to the other end, opposite to the light source (2), of the temperature measuring optical fiber (3) and used for receiving the test light output by the temperature measuring optical fiber (3), demodulating temperature data and outputting a corresponding control signal according to the temperature data;
and the cooling device (5) is coupled to the analysis controller (4) and is also arranged on the box edge of the storage box (1) so as to receive the control signal output by the analysis controller (4) and then spray coolant onto the lithium battery in the storage box (1).
2. The lithium battery thermal safety monitoring system based on the optical fiber detection technology as claimed in claim 1, wherein: the light source (2) comprises a laser source (21) and a processor (22), the laser source (21) is coupled with the processor (22) to output the laser source into the processor (22), and the processor (22) is connected with the temperature measurement optical fiber (3) to input the laser source into the temperature measurement optical fiber (3) as temperature measurement light after Raman scattering.
3. The lithium battery thermal safety monitoring system based on the optical fiber detection technology as claimed in claim 1 or 2, characterized in that: the analysis controller (4) includes:
an alert module (41) for emitting alert information;
the demodulator (42) is connected to the end part of the temperature measuring optical fiber (3) and used for receiving the temperature measuring light output by the temperature measuring optical fiber (3) and demodulating and outputting temperature data;
and the control analysis module (43) is coupled with the demodulator (42) and the warning module (41) and is also coupled with the cooling device (5) to receive the temperature data output by the demodulator (42), analyze and calculate the temperature data and output a corresponding control signal to the cooling device (5) so as to drive the cooling device (5) to spray the coolant to the heat-emitting lithium battery.
4. The lithium battery thermal safety monitoring system based on the optical fiber detection technology as claimed in claim 1 or 2, characterized in that: the cooling device (5) comprises a driving pump (51), a coolant pool (52) and a movable spray head, the movable spray head is arranged on the box edge of the storage box (1) in a sliding mode, one end of the driving pump (51) is connected to the coolant pool (52), the other end of the driving pump is connected to the movable spray head, the driving pump (51) is further coupled to the control analysis module (43) to receive a control signal output by the control analysis module (43), and then the driving pump acts to suck the coolant in the coolant pool (52) and then injects the coolant into the movable spray head.
5. The lithium battery thermal safety monitoring system based on the optical fiber detection technology as claimed in claim 1 or 2, characterized in that: when the lithium battery in the storage box (1) is a single lithium battery, the temperature measuring optical fiber (3) is wound on the lithium battery.
6. The lithium battery thermal safety monitoring system based on the optical fiber detection technology as claimed in claim 1 or 2, characterized in that: when the lithium batteries in the storage box (1) are single-row lithium batteries, the temperature measuring optical fibers (3) are wound on each lithium battery one by one.
7. The lithium battery thermal safety monitoring system based on the optical fiber detection technology as claimed in claim 1 or 2, characterized in that: when the lithium batteries in the storage box (1) are battery modules, the temperature measuring optical fiber (3) penetrates between the two rows of lithium batteries.
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| CN201921720801.XU CN211123183U (en) | 2019-10-14 | 2019-10-14 | Lithium battery thermal safety monitoring system based on optical fiber detection technology |
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| CN201921720801.XU CN211123183U (en) | 2019-10-14 | 2019-10-14 | Lithium battery thermal safety monitoring system based on optical fiber detection technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609235A (en) * | 2019-10-14 | 2019-12-24 | 中国民用航空飞行学院 | Lithium battery thermal safety monitoring system based on optical fiber detection technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110609235A (en) * | 2019-10-14 | 2019-12-24 | 中国民用航空飞行学院 | Lithium battery thermal safety monitoring system based on optical fiber detection technology |
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Granted publication date: 20200728 Termination date: 20211014 |