CN218122202U - Test device for detecting thermal runaway gas production rate of lithium battery - Google Patents
Test device for detecting thermal runaway gas production rate of lithium battery Download PDFInfo
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- CN218122202U CN218122202U CN202221874892.4U CN202221874892U CN218122202U CN 218122202 U CN218122202 U CN 218122202U CN 202221874892 U CN202221874892 U CN 202221874892U CN 218122202 U CN218122202 U CN 218122202U
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- thermal runaway
- end cover
- test device
- lithium battery
- production rate
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 8
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 230000001681 protective effect Effects 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000007600 charging Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 discloses a test device for detect gas rate is produced in lithium cell thermal runaway relates to lithium cell detection technology field, including detecting the box, there is the protection end cover detection box upper end portion through screwed connection, protection end cover upper end portion is equipped with filtering component and controller, the filtering component top is located to the controller, the protection end cover is equipped with pressure sensor with the detection box opposite side, electric plug and temperature sensor, pressure sensor, temperature sensor all passes through wire and electric plug connection, detect the inside lining piece that is equipped with of box, the inside annular thermoscope that is equipped with of lining piece, the inside terminal embedding of lining piece has the seepage pad, the inside mount pad that has the lithium cell that is equipped with of lining piece. The method and the device can calculate the time reaching the lower explosion limit in an energy storage system or other places where the lithium ion battery is installed, so that the safety time margin of thermal runaway of the lithium battery is calculated, scientific guidance is provided for the disposal of the accidents, and the method and the device have certain social value.
Description
Technical Field
The utility model relates to a lithium cell detects technical field, specifically is a detect test device of lithium cell thermal runaway gas production rate.
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 the user on the safety and durability of the new energy automobile. In various abuse situations, such as overheating, overcharge, overdischarge, impact, extrusion, internal and external short circuits, etc., of the battery, chemical reactions occur between various materials inside the battery, generating a large amount of heat, causing thermal runaway of the battery. The accumulator is subjected to an accumulative enhancement effect of current and battery temperature during constant voltage charging and is gradually damaged. Because the common lead-acid battery is filled with liquid between the positive plate and the negative plate without clearance, oxygen generated by the positive plate can not reach the negative plate in the charging process, so that hydrogen is easy to escape from the battery along with the oxygen when the negative plate is not depolarized. In the case of a valve-regulated lead-acid battery, oxygen generated inside during charging flows to the negative electrode, and the oxygen oxidizes the active substance, spongy lead, at the negative electrode plate, and effectively supplements water lost by electrolysis.
In the prior art, a test device and a method for detecting the thermal runaway gas production rate of a lithium battery are generally used for placing the lithium battery in a closed container, detecting the pressure and the temperature of the closed container and calculating the gas production rate through an ideal state gas equation. However, the method ignores the volatilization of the electrolyte after the explosion-proof valve is broken in the thermal runaway process of the battery, and the detection of the sealing performance of the lithium battery is complex. In view of the above, we propose a test device for detecting the thermal runaway gas production rate of a lithium battery to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a detect test device of lithium cell thermal runaway gas production rate to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a test device for detecting gas production rate of lithium cell thermal runaway, includes the detection box, it discharges the treater to detect the box upper end through being connected with communicating pipe, it is equipped with just to discharge treater upper end, it has the protection end cover to detect the box upper end through screwed connection, protection end cover upper end is equipped with filtering component and controller, the filtering component top is located to the controller, protection end cover is equipped with pressure sensor, electric plug and temperature sensor with the detection box opposite side, pressure sensor, temperature sensor all pass through wire and electric plug connection, the inside lining pad that is equipped with of detection box, the inside annular thermoscope that is equipped with of lining pad, the inside seepage pad that has of side upper end is embedded to the inside side of lining pad, the inside mount pad that is equipped with of lining pad, the inside lithium cell of mount pad passes through the wire with electric plug and is connected.
Preferably, the protection end cover from top to bottom cup joints on the mount pad, the protection end cover is equipped with the joint boss of joint on the mount pad with the mount pad opposite face.
Preferably, the middle part of seepage pad is located to joint boss lower tip, and seepage pad cementing on the lining block.
Preferably, the filter assembly is internally provided with filter cotton, and the inner cavity of the filter assembly is communicated with the inside of the communicating pipe.
Preferably, the controller is connected with the pressure sensor, the temperature sensor, the electric plug and the annular temperature detector through leads.
Preferably, a sealing ring is arranged between the detection box body and the protection end cover.
Preferably, a plurality of through holes are formed in the leakage pad.
Compared with the prior art, the beneficial effects of the utility model are that:
1. according to the test device for detecting the thermal runaway gas production rate of the lithium battery, the inner lining block is arranged on the inner side of the detection box body and is made of special aluminum alloy series materials with explosion-proof and barrier properties, so that the safety of the detection process can be guaranteed in the detection process of the lithium battery; when gas leakage occurs between the protective end cover and the mounting seat, high-temperature gas can enter the inner lining block through the leakage pad, so that an annular temperature detector inside the inner lining block is triggered, the sealing condition of the detection box body can be accurately known through triggering of the annular temperature detector, and the aperture of a through hole on the leakage pad is small when the leakage pad is not heated; after being heated, due to the characteristics of expansion with heat and contraction with cold, the aperture of the through hole on the protective end cover is increased, so that leaked gas can be quickly detected by the annular temperature detector, the structure is simple, the cost is low, meanwhile, the influence of volatilization of electrolyte in the thermal runaway process can be eliminated by the filter assembly arranged on the protective end cover, the time reaching the lower limit of explosion in an energy storage system or other places where the lithium ion battery is installed can be calculated by detecting the gas production rate of combustible gas of the lithium ion battery, the safety time margin of the thermal runaway of the lithium ion battery is calculated, scientific guidance is provided for the disposal of accidents, and the protective end cover has certain social value.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the explosion of the detection box of the present invention;
FIG. 3 is a schematic view of the lining block of the present invention;
fig. 4 is a bottom view of the protective end cap of the present invention.
In the figure: 1. detecting the box body; 2. a protective end cap; 3. an exhaust processor; 4. a discharge pipe; 5. a filter assembly; 6. a controller; 7. an electric plug; 8. an inner filler block; 9. a leakage pad; 10. a mounting base; 11. a communicating pipe; 12. an annular temperature detector; 13. a pressure sensor; 14. and a temperature sensor.
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 only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example (b): referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a test device for detecting lithium cell thermal runaway gas production rate, this application mainly to the thermal runaway problem that produces in the lithium cell use, calculates the time that reaches the explosion lower limit in energy storage system or other installation lithium ion battery occasions to calculate lithium cell thermal runaway's safe time allowance, provide scientific guidance for the processing of this type of accident.
The specific scheme is as follows: the detection box comprises a detection box body 1, wherein the detection box body 1 is made of special aluminum alloy series materials with explosion-proof and blocking performances, and the safety in the detection process can be improved. The upper end of the detection box body 1 is connected with a discharge processor 3 through a communicating pipe 11, the upper end of the discharge processor 3 is provided with a discharge pipe 4, and the discharge processor 3 can cool and filter high-temperature gas, so that the high-temperature gas reaches a safe discharge condition, and the safety of the surrounding environment is guaranteed.
Furthermore, there is a protection end cover 2 at the upper end of the detection box body 1 through a screw, and a sealing ring is arranged between the detection box body 1 and the protection end cover 2. At the screw-up in-process, locate the sealing washer production extrusion between detection box 1 and the protection end cover 2, through its bounce, can make the connection that detects box 1 and protection end cover 2 inseparabler. Be equipped with filter assembly 5 and controller 6 at 2 upper ends of protection end cover, filter assembly 5 tops are located to controller 6, and filter assembly 5 is inside to be equipped with the filter pulp, and 5 inner chambers of filter assembly and 11 inside intercommunications of communicating pipe. Wherein, filtering component 5 can filter the dust, and built-in filter pulp can adsorb dust etc. has got rid of the volatile influence of thermal runaway in-process electrolyte.
In this embodiment, the side of the protective end cover 2 opposite to the detection box 1 is provided with a pressure sensor 13, an electric plug 7 and a temperature sensor 14, the pressure sensor 13 and the temperature sensor 14 are connected with the electric plug 7 through wires, and the controller 6 is connected with the pressure sensor 13, the temperature sensor 14, the electric plug 7 and the annular temperature detector 12 through wires. In the lithium cell testing process, when the gas leakage appears, can trigger annular temperature detector 12, feed back the signal to controller 6 through annular temperature detector 12, control 7 departments of electric plug through controller 6 and cut off the power supply, terminate the detection of lithium cell, go on once more after solving until the leakproofness problem.
Referring to fig. 2 and 3, an inner lining block 8 is disposed inside the detection box 1, the material of the inner lining block 8 is the same as that of the detection box 1, an annular temperature measuring device 12 is disposed inside the inner lining block 8, a leakage pad 9 is embedded in the upper end portion of the inner side surface of the inner lining block 8, the leakage pad 9 is made of flexible rubber, and a plurality of through holes are disposed on the leakage pad 9. When the leakage pad 9 is not heated, the aperture of the through hole on the leakage pad is smaller; after being heated, the aperture of the through hole on the annular temperature detector is increased due to the expansion and contraction characteristics, so that leaked gas can be quickly detected by the annular temperature detector 12, the structure is simple, and the cost is low.
Furthermore, the inner lining block 8 is internally provided with a mounting seat 10 with a lithium battery, the protective end cover 2 is sleeved on the mounting seat 10 from top to bottom, and the opposite surfaces of the protective end cover 2 and the mounting seat 10 are provided with clamping bosses clamped on the mounting seat 10. The lithium battery inside the mounting seat 10 is connected with the electric plug 7 through a wire. Wherein, the electric plug 7 is provided with control elements corresponding to the pressure sensor 13, the temperature sensor 14 and the annular temperature detector 12. The lower end of the clamping boss is arranged in the middle of the leakage pad 9, and the leakage pad 9 is glued on the inner lining block 8.
The test device for detecting the thermal runaway gas production rate of the lithium battery comprises the following detection steps: 1. placing a lithium battery in the mounting seat 10, wherein the volume of the test box is V0, the volume of the lithium battery is V0l, and connecting the electric plug 7; 2. high-temperature gas can enter the inner lining block 8 through the leakage pad 9, so that the annular temperature detector 12 in the inner lining block 8 is triggered, the sealing condition of the detection box body can be accurately known through the triggering of the annular temperature detector 12, and the aperture of the through hole on the leakage pad 9 is small when the leakage pad is not heated; after the gas is heated, due to the characteristics of expansion with heat and contraction with cold, the aperture of the through hole on the gas increases, so that leaked gas can be quickly detected by the annular temperature detector 12, if the annular temperature detector 12 is not triggered, the tightness of the test box is good, and the normal pressure is recorded as P0; 3. after the sealing performance detection is passed, the controller 6 controls the pressure sensor 13 and the temperature sensor 14 to be electrified, and the lithium battery starts to be heated or overcharged through external equipment until the lithium battery is out of control thermally; 4. recording the test time when the data of the pressure sensor 13 does not rise any more, and closing the heating equipment; 5. when the data of the temperature sensor 14 is restored to the normal temperature, the data P of the pressure sensor 13 at the moment is recorded; 6. and calculating the gas production rate V = P (V0-V0 l)/P0 t of the lithium ion battery by using a formula.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a test device for detect gas rate is produced to lithium cell thermal runaway, is including detecting box (1), its characterized in that: the utility model discloses a lithium battery pack, including detection box (1), protection end cover (2), controller (6), filter component (5), electric plug (7), leak detector (10), detection box (1) upper end portion is connected with emission treater (3) through communicating pipe (11), emission treater (3) upper end portion is equipped with just discharging pipe (4), detection box (1) upper end portion has protection end cover (2) through screwed connection, protection end cover (2) upper end portion is equipped with filter assembly (5) and controller (6), filter assembly (5) top is located in controller (6), protection end cover (2) and detection box (1) opposite side are equipped with pressure sensor (13), electric plug (7) and temperature sensor (14), pressure sensor (13), temperature sensor (14) all are connected through wire and electric plug (7), the inside filler block (8) that is equipped with of detection box (1), inside annular thermoscope (8) that is equipped with of inner filler (12), the inside seepage pad (9) that has the lithium cell that has of inner filler (8) upper end portion is embedded, the inside of inner filler block (8) is equipped with mount pad (10), the inside lithium cell is connected through the wire with electric plug (7).
2. The test device for detecting the thermal runaway gas production rate of the lithium battery according to claim 1, characterized in that: protection end cover (2) cup joints on mount pad (10) from top to bottom, protection end cover (2) and mount pad (10) opposite face are equipped with the joint boss of joint on mount pad (10).
3. The test device for detecting the thermal runaway gas production rate of the lithium battery as claimed in claim 2, wherein: the middle part of seepage pad (9) is located to joint boss lower tip, and seepage pad (9) splice on lining piece (8).
4. The test device for detecting the thermal runaway gas production rate of the lithium battery as claimed in claim 1, wherein: the filter assembly (5) is internally provided with filter cotton, and the inner cavity of the filter assembly (5) is communicated with the inside of the communicating pipe (11).
5. The test device for detecting the thermal runaway gas production rate of the lithium battery according to claim 1, characterized in that: the controller (6) is connected with the pressure sensor (13), the temperature sensor (14), the electric plug (7) and the annular temperature detector (12) through leads.
6. The test device for detecting the thermal runaway gas production rate of the lithium battery according to claim 1, characterized in that: and a sealing ring is arranged between the detection box body (1) and the protection end cover (2).
7. The test device for detecting the thermal runaway gas production rate of the lithium battery as claimed in claim 1, wherein: the leakage pad (9) is provided with a plurality of through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221874892.4U CN218122202U (en) | 2022-07-20 | 2022-07-20 | Test device for detecting thermal runaway gas production rate of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221874892.4U CN218122202U (en) | 2022-07-20 | 2022-07-20 | Test device for detecting thermal runaway gas production rate of lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218122202U true CN218122202U (en) | 2022-12-23 |
Family
ID=84517617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221874892.4U Active CN218122202U (en) | 2022-07-20 | 2022-07-20 | Test device for detecting thermal runaway gas production rate of lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218122202U (en) |
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2022
- 2022-07-20 CN CN202221874892.4U patent/CN218122202U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An experimental device for detecting the rate of thermal runaway gas production in lithium batteries Granted publication date: 20221223 Pledgee: Agricultural Bank of China Limited Shanghai Songjiang Sub-branch Pledgor: Shanghai Weiji new energy Co.,Ltd. Registration number: Y2024980010759 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |