CN219121559U - Lithium battery thermal runaway temperature detection device - Google Patents
Lithium battery thermal runaway temperature detection device Download PDFInfo
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- CN219121559U CN219121559U CN202223286008.8U CN202223286008U CN219121559U CN 219121559 U CN219121559 U CN 219121559U CN 202223286008 U CN202223286008 U CN 202223286008U CN 219121559 U CN219121559 U CN 219121559U
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- shell
- thermal runaway
- circuit board
- lithium battery
- battery thermal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a lithium battery thermal runaway temperature detection device which comprises a shell and a circuit board, wherein a window is formed in the top of the shell, a through hole aligned with the window is formed in the bottom of the shell, an infrared filter is packaged in the window, the circuit board is arranged at the bottom of the shell, a darkroom is defined among the infrared filter, the shell and the circuit board, a plano-convex lens is arranged at the top of the darkroom, a photosensitive element is arranged in the through hole, and the photosensitive element is connected with the circuit board. The beneficial effects are that: the temperature measuring speed is high, the sensitivity is high, and the reliability is strong.
Description
Technical Field
The utility model relates to the technical field of lithium battery thermal runaway detection, in particular to a lithium battery thermal runaway temperature detection device.
Background
When thermal runaway occurs in a lithium battery, a large amount of gas is released and the temperature is rapidly increased, and thus combustion or explosion occurs. The means for detecting thermal runaway of lithium batteries generally include: gas detection and temperature detection, wherein temperature detection is a necessary condition for judging occurrence of thermal runaway.
At present, a thermal resistor or a thermocouple is generally adopted to detect the temperature. But the thermal resistor and the thermocouple belong to the thermal conduction mode temperature measurement and have certain temperature hysteresis. And the thermal response time of the thermocouple is complex, and different test conditions have different measurement results because the thermocouple is influenced by the heat exchange rate of the thermocouple and surrounding medium, and the reliability of thermocouple temperature measurement is also reduced. However, the development progress of thermal runaway of lithium batteries is rapid, and the temperature hysteresis can become a fatal defect of the detection products, so a rapid and reliable lithium battery thermal runaway temperature detection device is needed.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a lithium battery thermal runaway temperature detection device which has the advantages of high temperature measurement speed, high sensitivity and high reliability.
The aim of the utility model is achieved by the following technical measures: the utility model provides a lithium cell thermal runaway temperature detection device, includes casing and circuit board, the window has been seted up at the casing top, the through-hole that aligns with the window has been seted up to the casing bottom, the encapsulation has the infrared light filter in the window, the circuit board is established in the casing bottom, enclose into a darkroom between infrared light filter, casing and the circuit board, the top of darkroom is equipped with plano-convex lens, be equipped with photosensitive element in the through-hole, photosensitive element is connected with the circuit board.
Further, the photosensitive element comprises a photodiode or a phototransistor.
Further, the photosensitive element is disposed corresponding to the convex surface of the plano-convex lens.
Further, a clamping groove is formed between the infrared filter and the shell, and the plano-convex lens is clamped in the clamping groove.
Further, the shell is detachably connected with the circuit board.
Further, the shell is a plastic shell.
Compared with the prior art, the utility model has the beneficial effects that: according to the infrared light measuring device, infrared light is directly measured through the photosensitive element, heat exchange rate and heat conduction time are not needed to be considered, and temperature measurement is rapid; according to the method, natural light is filtered through the infrared filter, so that infrared light entering a dark room is infrared electromagnetic waves generated by high-temperature radiation, and the reliability of temperature measurement is improved; infrared light is converged on the photosensitive element through the plano-convex lens, so that the detection sensitivity is improved.
The utility model is described in detail below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
The device comprises a shell, a circuit board, an infrared filter, a plano-convex lens, a photosensitive element, a darkroom and a darkroom, wherein the circuit board comprises a shell, a circuit board, a photosensitive element and a darkroom.
Detailed Description
As shown in FIG. 1, a lithium battery thermal runaway temperature detection device, including casing 1 and circuit board 2, the window has been seted up at casing 1 top, the through-hole that aligns with the window has been seted up to casing 1 bottom, the encapsulation has infrared filter 3 in the window, infrared filter 3 is used for straining 850 nm's infrared light, and specifically, as long as the object that the temperature is higher than absolute zero all can emit infrared electromagnetic wave, when the temperature is higher than 200 ℃, the infrared band that sends can be up to 1050nm, and lithium battery thermal runaway's temperature is basically around 200 ℃, and this application can realize the temperature detection to up to 200 ℃ through detecting the infrared light of 850nm and above wave band to detect battery thermal runaway's temperature. The circuit board 2 is arranged at the bottom of the shell 1, a darkroom 6 is formed by enclosing the infrared filter 3, the shell 1 and the circuit board 2, a planoconvex lens 4 is arranged at the top of the darkroom 6, a photosensitive element 5 is arranged in the through hole, and the photosensitive element 5 is connected with the circuit board 2. Specifically, light below 850nm is filtered out through the infrared filter 3, and only light above 850nm is reserved through the window, so that the influence of ambient light is reduced, light transmitted through the infrared filter 3 is converged on the photosensitive element 5 through the plano-convex lens 4, so that the detection sensitivity is improved, the photosensitive element 5 converts a received optical signal into an electric signal, and the circuit board 2 performs signal processing on the converted electric signal and performs temperature judgment. The application filters natural light through infrared light filter 3, makes the infrared light that gets into in the darkroom 6 all be because of the infrared electromagnetic wave that high temperature radiation produced, improves temperature measurement's reliability, and this application is directly measured infrared light through photosensitive element 5, need not to consider heat transfer rate and heat conduction time, and temperature measurement is quick.
The photosensitive element 5 comprises a photodiode or a phototransistor. In particular, the spectral response of the photosensitive element 5 is in the range 850-1200nm.
The photosensitive element 5 is arranged corresponding to the convex surface of the planoconvex lens 4, so that infrared light can be conveniently converged on the photosensitive element 5, and the detection sensitivity is improved.
A clamping groove is formed between the infrared filter 3 and the shell 1, and the plano-convex lens 4 is clamped in the clamping groove.
The shell 1 is detachably connected with the circuit board 2. Further preferably, the housing 1 and the circuit board 2 may be connected by bolts.
The housing 1 is a plastic housing. Compared with the thermal resistor or thermocouple temperature measuring device in the prior art, the shell 1 of the thermal resistor or thermocouple temperature measuring device needs to be a metal shell with good thermal conductivity, and the thermal resistor or thermocouple temperature measuring device can be a plastic shell, so that the cost of the shell 1 is reduced.
It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. A lithium battery thermal runaway temperature detection device is characterized in that: the infrared filter is packaged in the window, the circuit board is arranged at the bottom of the shell, a darkroom is formed by surrounding the infrared filter, the shell and the circuit board, a plano-convex lens is arranged at the top of the darkroom, a photosensitive element is arranged in the through hole, and the photosensitive element is connected with the circuit board.
2. The lithium battery thermal runaway temperature detecting device according to claim 1, wherein: the photosensitive element comprises a photodiode or a phototransistor.
3. The lithium battery thermal runaway temperature detecting device according to claim 1, wherein: the photosensitive element is arranged corresponding to the convex surface of the plano-convex lens.
4. The lithium battery thermal runaway temperature detecting device according to claim 1, wherein: a clamping groove is formed between the infrared filter and the shell, and the plano-convex lens is clamped in the clamping groove.
5. The lithium battery thermal runaway temperature detecting device according to claim 1, wherein: the shell is detachably connected with the circuit board.
6. The lithium battery thermal runaway temperature detecting device according to claim 1, wherein: the shell is a plastic shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223286008.8U CN219121559U (en) | 2022-12-06 | 2022-12-06 | Lithium battery thermal runaway temperature detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223286008.8U CN219121559U (en) | 2022-12-06 | 2022-12-06 | Lithium battery thermal runaway temperature detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219121559U true CN219121559U (en) | 2023-06-02 |
Family
ID=86523959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223286008.8U Active CN219121559U (en) | 2022-12-06 | 2022-12-06 | Lithium battery thermal runaway temperature detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219121559U (en) |
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2022
- 2022-12-06 CN CN202223286008.8U patent/CN219121559U/en active Active
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