CN218445883U - Lithium battery thermal runaway triggers and quick measuring device that interrupts - Google Patents
Lithium battery thermal runaway triggers and quick measuring device that interrupts Download PDFInfo
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- CN218445883U CN218445883U CN202222095390.8U CN202222095390U CN218445883U CN 218445883 U CN218445883 U CN 218445883U CN 202222095390 U CN202222095390 U CN 202222095390U CN 218445883 U CN218445883 U CN 218445883U
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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
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Abstract
The utility model relates to a lithium cell thermal runaway triggers and quick interrupt measuring device, measuring device is obturator, include: the normally closed cover is provided with a first pressure sensor and an air inlet and exhaust electromagnetic valve; the lithium battery thermal runaway protector comprises a metal main box body for placing a lithium battery to be detected, wherein a metal inner container is sleeved in the metal main box body, an electric heating pipe and a temperature sensor are coated outside the metal inner container, and a cooling device for quickly interrupting a thermal runaway process of the lithium battery to be detected is arranged in the metal inner container; the sample injection cover is provided with a second pressure sensor; the needling component is arranged on the metal main box body and used for triggering thermal runaway of the lithium battery to be tested and performing puncture deflation on the lithium battery to be tested, which triggers the thermal runaway. Compared with the prior art, the utility model discloses a measuring device has realized that the multiple form of thermal runaway of full-size lithium cell triggers and interrupts fast to carry out thermal runaway each stage material state and gather and produce the gas state test.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell detects technique and specifically relates to a lithium cell thermal runaway triggers and quick interrupt measuring device.
Background
In recent years, the lithium ion power battery industry has been developed in a leap-forward manner, and the industry scale is leading in the world, and the lithium ion power battery industry becomes a core driving force for leading the motorization of automobiles. But frequent fire accidents affect the confidence of users on the safety and durability of the new energy automobile.
In the thermal runaway process of the lithium ion battery, a series of chemical reactions such as diaphragm contraction, electrolyte decomposition, anode and cathode decomposition and the like occur, and a large amount of heat and combustible gas are generated at the same time. The battery pack can be damaged by high temperature and high pressure generated after the battery core is out of control due to heat in the module, the material change, the gas production rule and the gas composition of the lithium battery at different stages of the out of control due to heat are evaluated, and the method has important significance for the research of the lithium battery.
The current experimental method is used for analyzing the battery thermal runaway process by detecting the pressure, the temperature and the voltage of a closed container in the battery thermal runaway process. The method ignores the material change and gas generation condition of each stage in the thermal runaway process of the battery, and cannot test and analyze the materials and gas of different thermal runaway development stages of the battery, and the method cannot truly reflect the state of each stage of the thermal runaway of the battery. With the increase of the size of the battery unit, part of the equipment can not meet the size requirement and the gas production test requirement.
Disclosure of Invention
The utility model aims at providing a lithium cell thermal runaway triggers and quick-break measuring device in order to overcome the defect that above-mentioned prior art exists, has realized that the multiple form of thermal runaway of full-size lithium cell triggers and quick-break, obtains the test of each stage material state of thermal runaway and gas production state.
The purpose of the utility model can be realized by the following technical proposal:
the utility model provides a lithium cell thermal runaway triggers and quick interrupt measuring device, measuring device is obturator, include:
the normally closed cover is provided with a first pressure sensor and an air inlet and exhaust electromagnetic valve;
the lithium battery thermal runaway protector comprises a metal main box body for placing a lithium battery to be detected, wherein a metal inner container is sleeved in the metal main box body, an electric heating pipe and a temperature sensor are coated outside the metal inner container, and a cooling device for quickly interrupting a thermal runaway process of the lithium battery to be detected is arranged in the metal inner container;
the sample injection cover is provided with a second pressure sensor and a plurality of spare interfaces;
the needling component is arranged on the metal main box body and used for triggering thermal runaway of the lithium battery to be tested and performing puncture deflation on the lithium battery to be tested, which triggers the thermal runaway.
Preferably, the cooling device comprises a detachable liquid cooling coil and a vacuum liquid nitrogen pipe;
the detachable liquid cooling coil is connected with a cooling liquid inlet and a cooling liquid outlet which are arranged on the sample injection cover; the vacuum liquid nitrogen pipe is connected to a low-temperature liquid nitrogen ball valve arranged on the sample injection cover.
Preferably, a fireproof heat-insulating layer is filled between the electric heating pipe and the metal inner container.
Preferably, the normally closed cover is further provided with a safety valve, a lighting device, a monitoring device and a first temperature and high pressure assembly;
and a second temperature high-pressure component with the same type as the first temperature high-pressure component is also arranged on the sample injection cover.
The measuring device is of a flat cylindrical structure.
Preferably, different inert gases can be filled in the metal inner container according to test conditions.
Preferably, the needling assembly includes a servo motor and a steel needle employing a servo motor to control the penetration depth.
Compared with the prior art, the utility model has the advantages of it is following:
1) The measuring device designed by the utility model can realize the multi-form triggering and the quick interruption of the thermal runaway of the lithium battery, and is convenient for the material state acquisition and the gas production state test at each stage of the thermal runaway;
2) The measuring device is a sealing device, and inert gas can be replaced in the device to eliminate the influence of air on inaccurate measurement of gas production components in the thermal runaway process, so that the gas production measuring result is more accurate;
3) The measuring device is of a flat cylinder type, and can meet the thermal runaway test requirement of most of current full-size lithium batteries under the condition of ensuring accurate and sensitive pressure.
Drawings
FIG. 1 is a schematic view of the measuring device of the present invention;
FIG. 2 is a detailed schematic view of a normally closed cover;
FIG. 3 is a detailed structural diagram of the sample injection cover;
FIG. 4 is a schematic cross-sectional view of a metal main box;
reference numerals: 1-a normally closed cover, 11-a safety valve, 12-a lighting device, 13-a monitoring device, 14-a first pressure sensor, 15-an air inlet and outlet electromagnetic valve, 16-a first temperature and high pressure component; 2-a metal main box body, 21-a fireproof heat-insulating layer, 22-an electric heating pipe, 23-a temperature sensor, 24-a metal inner container, 25-a detachable liquid cooling coil pipe and 26-a vacuum liquid nitrogen pipe; 3-a sample injection cover, 31-a low-temperature liquid nitrogen ball valve, 32-a cooling liquid inlet and outlet, 33-a second pressure sensor, 34-a second temperature and high pressure component and 35-a standby interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Examples
The embodiment provides a lithium battery thermal runaway triggering and quick interruption measuring device, which is used for solving the problem that the existing measuring device cannot test and analyze materials and gases of a battery at different thermal runaway development stages; the measuring device is a closed device and comprises:
the normally closed cover 1 is provided with a safety valve 11, a lighting device 12, a monitoring device 13, a first pressure sensor 14, an air inlet and outlet electromagnetic valve 15 and a first temperature and high pressure assembly 16;
the lithium battery detection device comprises a metal main box body 2 for placing a lithium battery to be detected, a metal inner container 24 is sleeved in the metal main box body, an electric heating pipe 22 and a temperature sensor 23 are arranged outside the metal inner container 24, and a fireproof heat preservation layer 21 is filled between the electric heating pipe 22 and the metal inner container 24; a cooling device for rapidly interrupting the thermal runaway process of the lithium battery to be tested is arranged in the metal inner container 24; the cooling device comprises a detachable liquid cooling coil 25 and a vacuum liquid nitrogen pipe 26; the detachable liquid cooling coil 25 is connected with a cooling liquid inlet and outlet 32 arranged on the sample injection cover 3; the vacuum liquid nitrogen pipe 26 is connected to a low-temperature liquid nitrogen ball valve 31 arranged on the sample injection cover 3; inert gas is filled in the metal inner container 24;
the sample injection cover 3 is provided with a low-temperature liquid nitrogen ball valve 31, a cooling liquid inlet and outlet 32, a second pressure sensor 33, a second temperature and high pressure assembly 34 and a plurality of standby interfaces 35.
The needling component 4 arranged on the metal main box body 2 comprises a servo motor and a steel needle which adopts the servo motor to control the penetration depth, and is used for triggering the thermal runaway of the lithium battery to be tested and performing puncture deflation on the lithium battery to be tested which triggers the thermal runaway.
In addition, the measuring device in the embodiment is of a flat-laying cylindrical structure, the diameter is 500mm, the length is 1500mm, and the measuring device is suitable for testing a full-size lithium battery.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a lithium cell thermal runaway triggers and quick interruption measuring device which characterized in that, measuring device is closing device, includes:
the normally closed cover (1) is provided with a first pressure sensor (14) and an air inlet and outlet electromagnetic valve (15);
the device comprises a metal main box body (2) for placing a lithium battery to be tested, wherein a metal inner container (24) is sleeved in the metal main box body, an electric heating pipe (22) and a temperature sensor (23) are arranged outside the metal inner container (24), and a cooling device for rapidly interrupting a thermal runaway process of the lithium battery to be tested is arranged in the metal inner container (24);
the sample injection cover (3) is provided with a second pressure sensor (33) and a plurality of spare interfaces (35);
and the needling component (4) is arranged on the metal main box body (2) and is used for triggering thermal runaway of the lithium battery to be tested and performing puncture and deflation on the lithium battery to be tested, which is triggered to be thermally runaway.
2. The lithium battery thermal runaway trigger and quick interruption measuring device of claim 1, wherein the cooling device comprises a removable liquid cooling coil (25) and a vacuum liquid nitrogen tube (26);
the detachable liquid cooling coil (25) is connected with a cooling liquid inlet and outlet (32) arranged on the sample injection cover (3); the vacuum liquid nitrogen pipe (26) is connected to a low-temperature liquid nitrogen ball valve (31) arranged on the sample injection cover (3).
3. The lithium battery thermal runaway triggering and rapid interruption measuring device according to claim 1, wherein a fireproof insulating layer (21) is filled between the electric heating tube (22) and the metal inner container (24).
4. The lithium battery thermal runaway triggering and quick interruption measuring device according to claim 1, characterized in that the normally closed cover (1) is further provided with a safety valve (11), a lighting device (12), a monitoring device (13) and a first temperature and high voltage assembly (16);
and a second temperature and high-pressure component (34) with the same type as the first temperature and high-pressure component (16) is also arranged on the sample injection cover (3).
5. The lithium battery thermal runaway trigger and quick interrupt measurement device of claim 1, wherein the measurement device is a lay-flat cylindrical configuration.
6. The lithium battery thermal runaway triggering and quick interruption measuring device of claim 1, wherein different inert gases can be filled in the metal inner container (24) according to test conditions.
7. The lithium battery thermal runaway trigger and quick interrupt measurement device as claimed in claim 1, wherein the needling assembly (4) comprises a servo motor and a steel needle employing a servo motor to control the penetration depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222095390.8U CN218445883U (en) | 2022-08-10 | 2022-08-10 | Lithium battery thermal runaway triggers and quick measuring device that interrupts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222095390.8U CN218445883U (en) | 2022-08-10 | 2022-08-10 | Lithium battery thermal runaway triggers and quick measuring device that interrupts |
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| Publication Number | Publication Date |
|---|---|
| CN218445883U true CN218445883U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222095390.8U Active CN218445883U (en) | 2022-08-10 | 2022-08-10 | Lithium battery thermal runaway triggers and quick measuring device that interrupts |
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| CN (1) | CN218445883U (en) |
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2022
- 2022-08-10 CN CN202222095390.8U patent/CN218445883U/en active Active
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