CN103134612A - Lithium ion battery internal temperature monitoring device - Google Patents
Lithium ion battery internal temperature monitoring device Download PDFInfo
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- CN103134612A CN103134612A CN201110397137.1A CN201110397137A CN103134612A CN 103134612 A CN103134612 A CN 103134612A CN 201110397137 A CN201110397137 A CN 201110397137A CN 103134612 A CN103134612 A CN 103134612A
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- ion battery
- internal temperature
- monitoring device
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Abstract
The invention discloses a lithium ion battery internal temperature monitoring device. The lithium ion battery internal temperature monitoring device comprises a fluorescence optical fiber which is arranged inside a lithium ion battery. A reflected light eliminating device is arranged at one end of the fluorescence optical fiber and inside the lithium ion battery. The other end of the fluorescence optical fiber penetrates out of the lithium ion battery and is connected with an optical coupler which is arranged in a shell. An optical detection module, a light source, a light source driver module and a control module are arranged in the shell. The optical detection module and the light source are connected with the optical coupler. The light source driver module is connected with the light source and the control module. The control module is connected with the optical detection module. The fluorescence optical fiber comprises a fiber core and an inner covering layer arranged outside the fiber core. A refractive index of the fiber core is larger than a refractive index of the inner covering layer. The lithium ion battery internal temperature monitoring device is simple in structure, low in cost and small in size, resists electromagnetic interference, and can achieve the goal of distributed or quasi-distributed temperature monitoring.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, be specifically related to a kind of internal temperature of lithium ion battery monitoring device.
Background technology
Lithium ion battery has been widely used in industry-by-industry, its with respect to other batteries have that various voltages are high, relative volume power density and energy density is high, the life-span long, pollute the advantages such as little.But there is the temperature safety problem in lithium ion battery in application, is particularly a very important link to the monitoring internal temperature of large capacity, highdensity lithium ion battery group.The physics and chemistry process that complexity is arranged of inside lithium ion cell easily causes the accumulation of heat, thereby causes the thermal runaway of battery.And if the inner temperature measuring equipment of existing lithium ion adopts traditional thermopair technology, its monitoring accuracy is low, be subject to electromagnetic interference (EMI), volume is large, to shortcomings such as electricity are on-insulated, uses more difficult.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of internal temperature of lithium ion battery monitoring device is provided, it is simple in structure, cost is low, volume is little, anti-electromagnetic interference (EMI), and can realize the purpose of distributed or quasi-distributed temperature monitoring.
For achieving the above object, the technical solution used in the present invention is: a kind of internal temperature of lithium ion battery monitoring device, it is characterized in that: comprise the fluorescence optical fiber that is arranged on inside lithium ion cell, one end of described fluorescence optical fiber and be positioned at lithium ion battery the reflected light cancellation element is installed, the other end of described fluorescence optical fiber pass lithium ion battery and are connected with photo-coupler in being arranged on housing; Also be provided with photodetection module, light source, light source driver module and control module in described housing, described photodetection module and light source all are connected with photo-coupler, described light source driver module is connected with control module with light source and is connected, and described control module also is connected with the photodetection module; Described fluorescence optical fiber comprises fibre core and is arranged on the outer inner cladding of fibre core, the refractive index greater than inner cladding of the refractive index of described fibre core.
Above-mentioned internal temperature of lithium ion battery monitoring device is characterized in that: described inner cladding is outside equipped with surrounding layer, and described inner cladding refractive index is greater than the refractive index of surrounding layer.
Above-mentioned internal temperature of lithium ion battery monitoring device is characterized in that: described surrounding layer is coated with the polymer protection layer outward.
Above-mentioned internal temperature of lithium ion battery monitoring device is characterized in that: described polymer protection layer is fluorinated olefins layer, polyvinyl chloride layer, layer of polyurethane or polyethylene layer.
Above-mentioned internal temperature of lithium ion battery monitoring device is characterized in that: described inner cladding is interior covering doped with the active fluoro material.
Above-mentioned internal temperature of lithium ion battery monitoring device is characterized in that: described fibre core is the silica-based glass core, and described inner cladding is silica-based glass inner cladding.
The present invention compared with prior art has the following advantages:
1, the fluorescence optical fiber that adopts in the present invention is that the active fluoro material is positioned at inner cladding, and non-activity fluorescent material doping in fibre core, thereby can with incident light wave and with the fluorescence light wave of heat transfer agent in the fibre core long-distance transmissions, can realize the purpose of distributed or quasi-distributed monitor temperature by photodetection module and control module, namely utilize a fluorescence optical fiber can realize the monitoring of a plurality of regional temperatures of inside lithium ion cell, reduce cost, improved the security of lithium ion battery.
2, the present invention can accurately monitor the variation of internal temperature of lithium ion battery, has easy to use, the advantages such as cost is low, anti-electromagnetic interference (EMI).
In sum, that internal temperature of lithium ion battery monitoring device of the present invention has is simple in structure, cost is low, volume is little, anti-electromagnetic interference (EMI), and can realize the purpose of distributed or quasi-distributed temperature monitoring.
Below by drawings and Examples, the present invention is described in further detail.
Description of drawings
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is fluorescence optical fiber structural representation of the present invention.
Description of reference numerals:
The 1-shell; The 2-washing tube; The 3-time switch;
The 4-ozone generator; The 5-ultrasonic controller; 6-the first air hose;
7-fining air bubbles device; The 8-ultrasonic generator; 9-contains ozone bubbles;
10-liquid; The 11-air pump; The 12-ozonizer;
The 14-regulating device of air door; 15-the second air hose.
Embodiment
As depicted in figs. 1 and 2, the present invention includes the fluorescence optical fiber 6 that is arranged on lithium ion battery 10 inside, one end of described fluorescence optical fiber 6 and be positioned at lithium ion battery 10 reflected light cancellation element 15 is installed, the other end of described fluorescence optical fiber 6 pass lithium ion battery 10 and are connected with photo-coupler 9 in being arranged on housing 8; Also be provided with photodetection module 5, light source 11, light source driver module 12 and control module 7 in described housing 8, described photodetection module 5 is connected with light source and all is connected with photo-coupler 9, described light source driver module 12 is connected with control module with light source 11 and all is connected, and described control module 7 also is connected with photodetection module 5; Described fluorescence optical fiber 6 comprises fibre core 1 and is arranged on the outer inner cladding 2 of fibre core 1, the refractive index greater than inner cladding 2 of the refractive index of described fibre core 1.
As shown in Figure 2, described inner cladding 2 is outside equipped with surrounding layer 3, and described inner cladding 2 refractive indexes are greater than the refractive index of surrounding layer 3.
As shown in Figure 2, the outer polymer protection layer 4 that is coated with of described surrounding layer 3.
In the present embodiment, described polymer protection layer 4 is fluorinated olefins layer, polyvinyl chloride layer, layer of polyurethane or polyethylene layer, and fluorinated olefins is teflon or Kynoar.
In the present embodiment, described inner cladding 2 is interior covering doped with the active fluoro material, the interior non-activity fluorescent material of described fibre core 1.
In the present embodiment, described fibre core 1 is the silica-based glass core, and described inner cladding 2 is silica-based glass inner cladding; Be that fibre core 1 and inner cladding 2 all adopt the silica-based glass material to make, the silica-based glass material can be silica glass material, or is added with the silica glass material of the adjuvants such as germanium dioxide.
In the present embodiment, reflected light cancellation element 15 be with fluorescence optical fiber take less than the coiling of diameter 20mm as a circle or multi-turn and stationary device; Fluorescence optical fiber 6 is to be laid in lithium ion battery 10 inside according to certain distribution.
the course of work of the present invention is: control module 7 is controlled light source driver module 12 makes light source 11 send pulsed optical signals, this light signal enters in the fluorescence optical fiber 6 that is laid in lithium ion battery 10 inside by photo-coupler 9, the light signal overwhelming majority of incident is in the interior transmission of fibre core 1, but have a small amount of light signal in the interior transmission of inner cladding 2, the reflected light cancellation element 15 that the light signal of incident is installed in fluorescence optical fiber 6 ends dissipates, the light signal of incident can excite the active fluoro material that is positioned at inner cladding 2 doping, the latter sends fluorescence, and have part fluorescence to be coupled into the interior transmission of fibre core 1 and to return by photo-coupler 9 to enter photodetection module 5, photodetection module 5 has been obtained fluorescence signal, and will pass to control module 7 to signal.When the temperature variation at the place on the fluorescence optical fiber 6 that is laid in lithium ion battery 10 inside, the fluorescence signal that this place sends also can change, photodetection module 5 has been obtained the fluorescence signal of this variation, and will pass to control module 7 to signal, control module 7 calculates the variation of temperature, thereby has reached the purpose that monitoring lithium ion battery 10 internal temperatures change.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every according to the technology of the present invention essence to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solution of the present invention.
Claims (6)
1. internal temperature of lithium ion battery monitoring device, it is characterized in that: comprise being arranged on the inner fluorescence optical fiber (6) of lithium ion battery (10), one end of described fluorescence optical fiber (6) and be positioned at lithium ion battery (10) reflected light cancellation element (15) is installed, the other end of described fluorescence optical fiber (6) pass lithium ion battery (10) and are connected with photo-coupler (9) in being arranged on housing (8); Also be provided with photodetection module (5), light source (11), light source driver module (12) and control module (7) in described housing (8), described photodetection module (5) is connected 11 with light source) all be connected with photo-coupler (9), described light source driver module (12) is connected 7 with light source (11) with control module) all be connected, described control module (7) also is connected with photodetection module (5); Described fluorescence optical fiber (6) comprises fibre core (1) and is arranged on the outer inner cladding (2) of fibre core (1), the refractive index greater than inner cladding (2) of the refractive index of described fibre core (1).
2. internal temperature of lithium ion battery monitoring device according to claim 1, it is characterized in that: described inner cladding (2) is outside equipped with surrounding layer (3), and described inner cladding (2) refractive index is greater than the refractive index of surrounding layer (3).
3. internal temperature of lithium ion battery monitoring device according to claim 2, is characterized in that: the outer polymer protection layer (4) that is coated with of described surrounding layer (3).
4. internal temperature of lithium ion battery monitoring device according to claim 3 is characterized in that: described polymer protection layer (4) is fluorinated olefins layer, polyvinyl chloride layer, layer of polyurethane or polyethylene layer.
5. internal temperature of lithium ion battery monitoring device according to claim 1 and 2, it is characterized in that: described inner cladding (2) is interior covering doped with the active fluoro material.
6. internal temperature of lithium ion battery monitoring device according to claim 1 and 2 is characterized in that: described fibre core (1) is the silica-based glass core, and described inner cladding (2) is silica-based glass inner cladding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397137.1A CN103134612A (en) | 2011-12-04 | 2011-12-04 | Lithium ion battery internal temperature monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397137.1A CN103134612A (en) | 2011-12-04 | 2011-12-04 | Lithium ion battery internal temperature monitoring device |
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| CN103134612A true CN103134612A (en) | 2013-06-05 |
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| CN201110397137.1A Pending CN103134612A (en) | 2011-12-04 | 2011-12-04 | Lithium ion battery internal temperature monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900733A (en) * | 2014-03-04 | 2014-07-02 | 清华大学 | Method for measuring temperature field distribution inside battery |
| CN103994840A (en) * | 2014-05-29 | 2014-08-20 | 普联技术有限公司 | Method and device for obtaining highest temperature value of mobile terminal battery |
| CN104330178A (en) * | 2014-11-10 | 2015-02-04 | 国网辽宁省电力有限公司鞍山供电公司 | Wireless temperature measuring system for pre-buried lithium battery |
| CN106410307A (en) * | 2016-10-13 | 2017-02-15 | 江汉大学 | Lithium battery safety real-time monitoring system |
| WO2023184541A1 (en) * | 2022-04-02 | 2023-10-05 | 宁德时代新能源科技股份有限公司 | Battery pack and electric device comprising same |
-
2011
- 2011-12-04 CN CN201110397137.1A patent/CN103134612A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900733A (en) * | 2014-03-04 | 2014-07-02 | 清华大学 | Method for measuring temperature field distribution inside battery |
| CN103994840A (en) * | 2014-05-29 | 2014-08-20 | 普联技术有限公司 | Method and device for obtaining highest temperature value of mobile terminal battery |
| CN103994840B (en) * | 2014-05-29 | 2017-03-08 | 普联技术有限公司 | A kind of method and device of the maximum temperature value obtaining battery of mobile terminal |
| CN104330178A (en) * | 2014-11-10 | 2015-02-04 | 国网辽宁省电力有限公司鞍山供电公司 | Wireless temperature measuring system for pre-buried lithium battery |
| CN106410307A (en) * | 2016-10-13 | 2017-02-15 | 江汉大学 | Lithium battery safety real-time monitoring system |
| WO2023184541A1 (en) * | 2022-04-02 | 2023-10-05 | 宁德时代新能源科技股份有限公司 | Battery pack and electric device comprising same |
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Application publication date: 20130605 |