CN114397529A - Adiabatic experiment bin and thermal runaway experiment method - Google Patents
Adiabatic experiment bin and thermal runaway experiment method Download PDFInfo
- Publication number
- CN114397529A CN114397529A CN202210120761.5A CN202210120761A CN114397529A CN 114397529 A CN114397529 A CN 114397529A CN 202210120761 A CN202210120761 A CN 202210120761A CN 114397529 A CN114397529 A CN 114397529A
- Authority
- CN
- China
- Prior art keywords
- experimental
- bin
- experiment
- temperature
- adiabatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002474 experimental method Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 239000011229 interlayer Substances 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims description 26
- 238000009413 insulation Methods 0.000 claims description 17
- 230000007613 environmental effect Effects 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 27
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 13
- 229910052744 lithium Inorganic materials 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 11
- 239000000428 dust Substances 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 201000009032 substance abuse Diseases 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000017899 Spathodea campanulata Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to an adiabatic experimental chamber and a thermal runaway experimental method, the adiabatic experimental chamber comprises a chamber body, a heating device, at least one first temperature sensor and at least one second temperature sensor, the bin body comprises an inner shell and an outer shell, a interlayer cavity is arranged between the outer shell and the inner shell, the inner housing having an experimental lumen configured for placement of a target object, the bin body is provided with a bin opening communicated with the experimental inner cavity, the bin opening is provided with a bin gate, the heating device is arranged in the interlayer cavity, at least one first temperature sensor is arranged in the experimental inner cavity, the first temperature sensor is configured for acquiring temperature information of a target object, at least one second temperature sensor is arranged in the experiment inner cavity, the second temperature sensor is configured to acquire ambient temperature information of the experimental lumen. And further, a thermal runaway scene can be effectively simulated, and the existing experimental research requirements are met.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a heat insulation experiment bin and a thermal runaway experiment method.
Background
Since the lithium cobalt oxide battery was invented in the first 80 s of the last century, the continuous progress of the lithium battery technology makes traffic electromotion possible, and meanwhile, the demand of new energy automobiles (electric cars) for the lithium battery further accelerates the rapid development of the lithium battery towards the direction of high specific energy. At present, the energy density of a mainstream new energy automobile system in the world is over 150W/kg, in order to meet the development requirement of new energy automobiles, the energy density of a lithium battery monomer needs to reach 350W/kg, the energy density of the system is 280W/kg, and the safety pressure of the new energy automobiles is increased along with the improvement of the energy density, so that the fire cause analysis and the understanding of a fire prevention mechanism of the new energy automobiles need to be strengthened, a fire prevention strategy from the monomer to the whole automobile is constructed, and the safety of the lithium battery in the use process is improved.
The new energy automobile generally undergoes the following steps when the new energy automobile is ignited by combustion: various abuses induce thermal runaway of the battery monomer, and the thermal runaway of the monomer transfers heat and mass to the surroundings, so that thermal runaway of the adjacent battery monomer is caused, internal thermal spreading of the module is caused, a domino effect is further caused, and large-scale thermal runaway is triggered. The thermal runaway heat and mass transfer in the battery pack reaches the combustion condition, so that deflagration fireball or jet flame is formed, and the comburent in the automobile is ignited, thereby causing severe electric vehicle fire.
The evolution process of thermal runaway can be divided into evolution and mutation. The evolution refers to that the reliability is reduced due to aging of the inside of the battery, the battery connection structure and the battery management structure in the long-term working process of the power battery, and the reliability comprises growth of metal dendrites in the battery, local overheating caused by looseness of the battery connection structure, long-time overcharge caused by failure of a battery management system and the like. Abrupt change refers to external damage to the battery structure or external short circuit caused by sudden factors, such as internal short circuit caused by penetration of the battery due to vehicle collision, leakage of cooling fluid, or external short circuit caused by damage to external circuits.
The safety accident of the power battery is mainly characterized by thermal runaway of the battery pack. The lithium battery monomer generates thermal runaway in various inducements, namely the thermal runaway is generated due to local overheating of the battery and spreads to other areas to further induce the thermal runaway of the full battery, or the thermal runaway of the full battery is induced by uniform heating when the environmental temperature of the battery is too high. The actual scenes corresponding to the local thermal runaway include battery puncture, mechanical extrusion, internal short circuit, thermal runaway of adjacent batteries, and local thermal runaway caused by convection, heat conduction or flame and the like. The scenes corresponding to the thermal runaway induced by the overall temperature equalization of the battery mainly include overcharge and overdischarge of the battery, failure of a battery thermal management system, large-scale combustion of a battery module and the like. These two thermal shock-induced safety incidents of batteries cover almost all practical scenarios of thermal runaway combustion explosion of batteries.
When heat generation, air injection and combustion characteristics of a power battery in a thermal runaway process are studied, current experimental means include an acceleration calorimeter (ARC), an adiabatic reaction heat energy tester (VSP 2), a Differential Scanning Calorimeter (DSC), a cone calorimeter, and the like. The cone calorimeter is used for igniting the lithium battery by using external flame, measuring the combustion heat release quantity and the heat release power of the battery based on an oxygen consumption method (OC), and the acceleration calorimeter and the adiabatic reaction heat energy determinator are used for measuring the thermal runaway behavior of the battery by heating the battery in a sealed cavity until the thermal runaway, and do not directly measure the heat in the process.
However, in an actual scene, battery pack thermal runaway combustion is usually caused by thermal runaway of one or more batteries under abuse conditions, and then combustion of a module and a battery pack is caused, the combustion process is not like ignition of external flame of a cone calorimeter, the cone calorimeter can only carry out a combustion heating experiment on a battery monomer generally, and an acceleration calorimeter and an adiabatic reaction thermal energy tester heat the batteries in a closed space to induce the thermal runaway, and the difference of the actual scene of the thermal runaway of the battery pack and the actual scene of the thermal runaway of the lithium battery is larger. Therefore, the existing experimental equipment has the problem of scene distortion simulation, and the existing experimental research requirements cannot be met.
Disclosure of Invention
Therefore, it is necessary to provide an adiabatic experiment chamber and a thermal runaway experiment method for solving the problems that the existing experiment equipment has distorted simulated scenes and cannot meet the requirements of the existing experiment research.
The invention provides an adiabatic experiment bin, which comprises:
the bin body comprises an inner shell and an outer shell, a sandwich layer cavity is arranged between the outer shell and the inner shell, the inner shell is provided with an experiment inner cavity, the experiment inner cavity is configured to be used for placing a target object, a bin opening communicated with the experiment inner cavity is formed in the bin body, and a bin door is arranged on the bin opening;
a heating device disposed within the interlayer cavity;
at least one first temperature sensor disposed in the experimental lumen, the first temperature sensor configured to acquire temperature information of a target object;
at least one second temperature sensor disposed in the experimental lumen, the second temperature sensor configured for acquiring ambient temperature information of the experimental lumen.
In one embodiment, the temperature information of the target object comprises surface temperature information of the target object; and/or the presence of a gas in the gas,
the environmental temperature information of the experiment inner cavity comprises the inner wall temperature information of the inner shell.
In one embodiment, at least one first temperature sensor is arranged on the surface of the target object and used for acquiring surface temperature information of the target object; and/or the presence of a gas in the gas,
at least one second temperature sensor is arranged on the inner wall of the inner shell and used for acquiring the temperature information of the inner wall of the inner shell.
In one embodiment, the experimental lumen has a central spatial region and a peripheral spatial region surrounding the central spatial region;
a target bearing support is arranged in an experiment inner cavity of the bin body, the target object is arranged on the target bearing support, and the target object is located in a central space area of the experiment inner cavity through the target bearing support.
In one embodiment, the heating device comprises heating wires which are uniformly wound on the inner shell and distributed in the interlayer cavity.
In one embodiment, the adiabatic experimental chamber comprises:
the pressure sensor is arranged on the bin body and used for acquiring pressure information of the experimental inner cavity.
In one embodiment, the adiabatic experimental chamber comprises:
the laser smoke density sensor is arranged on the bin body and used for acquiring smoke density information of the experimental inner cavity.
In one embodiment, the bin body is provided with a pressure relief opening communicated with the experiment inner cavity, and the pressure relief opening is provided with a pressure relief valve.
In one embodiment, the adiabatic experimental chamber comprises:
and the vacuumizing device is arranged on the bin body, is communicated with the experiment inner cavity and is used for adjusting the vacuum state of the experiment inner cavity.
The invention provides a thermal runaway experimental method, which comprises the following steps:
providing an insulated experimental chamber;
acquiring the environmental temperature information of the experimental inner cavity and the temperature information of the target object, and adjusting the environmental temperature of the experimental inner cavity and the temperature of the target object to be consistent according to the environmental temperature information of the experimental inner cavity and the temperature information of the target object;
and increasing the ambient temperature of the experimental cavity, and further increasing the temperature of the target object.
Among the above-mentioned adiabatic experiment storehouse, the experiment inner chamber in adiabatic experiment storehouse is adiabatic inner chamber, can realize adiabatic heating and trigger thermal runaway, place target objects such as battery in the experiment inner chamber, the ambient temperature that can keep experimenting the inner chamber equals with the surface temperature of battery all the time, minimize the heat dissipation of battery to the environment, and constantly improve ambient temperature, and then trigger thermal runaway, simulate thermal runaway scene effectively, can measure battery thermal runaway's the spontaneous production heat initial temperature effectively at this in-process, critical temperature parameters such as quick thermal runaway temperature and thermal runaway emergence back battery surface highest temperature, satisfy current experimental research demand.
Drawings
FIG. 1 is a front view of an insulated experimental chamber according to an embodiment of the present invention;
FIG. 2 is a side view of the insulated laboratory bin shown in FIG. 1;
FIG. 3 is a top view of the insulated experimental silo shown in FIG. 1;
FIG. 4 is a flow chart of a thermal runaway experimental method provided by an embodiment of the invention.
Reference numerals:
1. a bin gate positioning device; 2. a bin gate; 3. a door handle; 4. a hydraulic push-pull rod; 5. a smoke dust collecting hole; 6. a pressure relief valve; 7. a support; 8. a hydraulic cylinder; 9. a vacuum pumping device; 10. a seal head flange; 11. a first pressure sensor; 12. an exhaust stack; 13. a second pressure sensor; 14. an observation window; 15. a laser smoke density sensor support; 16. a first laser smoke density sensor; 17. a second laser smoke density sensor; 18. a first temperature sensor harness; 19. a power-on circuit; 20. a second temperature sensor harness; 21. a hydraulic tank; 22. a door flange mount; 23. sealing gaskets; 24. sealing the teeth; 25. a heating device; 26. a vacuum gauge; 27. a standby temperature sensor wire harness penetrates through the hole; 28. a gas sampling aperture; 29. fire extinguishing agent spraying holes; 30. an air inlet of the vacuum sleeve; 31. a vacuum sleeve vent; 32. checking a hand hole; 33. an air inlet and outlet hole; 34. and (6) a light compensating hole.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Firstly, the heat generation quantity of the battery before T1 (60-80 ℃ since the heat generation reaction begins) is very small, and mainly refers to the heat generation of internal resistance, SEI film formation process and dissolution decomposition in the charging and discharging process. The complicated chemical reaction of the battery between T1 and T2 (the temperature at which thermal runaway begins, defined as the temperature rise rate of the battery surface is greater than 1 ℃/min) generates a large amount of gas products, the electrolyte can be vaporized against the increase of the battery temperature, the accumulation of the gas amount in the battery causes the increase of the internal pressure of the battery, and the battery can generate phenomena such as swelling and the like. The separator of the battery is subjected to shrinkage and melting in the process, from micro internal short circuit to full internal short circuit, and the voltage of the battery terminal is reduced to 0. When the pressure reaches a certain value, the safety valve of the battery is opened to release the pressure inside the battery. When the opening degree of the safety valve is insufficient or the safety valve is opened too slowly and the gas production rate in the battery is high, the battery explosion phenomenon can be generated. After T2, the battery generates heat violently, the battery generates heat in three parts, the chemical reaction in the battery generates heat, the out gas burns to release heat, and the jet burns to release heat. After the thermal runaway of the battery occurs, the erupted or exploded gas generally has toxicity and flammability, the erupted matter simultaneously has high-temperature particles and oxygen generated by the anode, and when the concentration of the mixed gas of the erupted gas and the environmental gas, the gas flow rate, the high-temperature particles, the surface of the high-temperature battery and other factors are coupled and have three burning factors, the mixed gas can be burnt or exploded. In summary, the more significant signals during thermal runaway include cell surface temperature, terminal voltage, bulge stress, deformation, solid particles in cell spray, smoke, gases, and flaming fires. The comparative analysis of the above signals includes, but is not limited to, sharpness, timing, spatial location differences, and the like.
Referring to fig. 1 to 3, an embodiment of the present invention provides an adiabatic experimental chamber, the adiabatic experimental bin comprises a bin body, a heating device 25, at least one first temperature sensor and at least one second temperature sensor, the bin body comprises an inner shell and an outer shell, a interlayer cavity is arranged between the outer shell and the inner shell, the inner housing having an experimental lumen configured for placement of a target object, the bin body is provided with a bin opening communicated with the experimental inner cavity, the bin opening is provided with a bin gate 2, a heating device 25 is arranged in the interlayer cavity, at least one first temperature sensor is arranged in the experimental inner cavity, the first temperature sensor is configured for acquiring temperature information of a target object, at least one second temperature sensor is arranged in the experiment inner cavity, the second temperature sensor is configured to acquire ambient temperature information of the experimental lumen.
The experiment inner chamber of adiabatic experiment storehouse is adiabatic inner chamber, can realize adiabatic heating and trigger thermal runaway, its rationale is through placing target objects such as battery in the experiment inner chamber, the ambient temperature who keeps the experiment inner chamber equals with the surface temperature of battery all the time, minimize the heat dissipation of battery to the environment, and constantly improve ambient temperature, and then trigger thermal runaway, can measure the spontaneous production heat initial temperature of battery thermal runaway effectively at this in-process, critical temperature parameters such as quick thermal runaway temperature and battery surface highest temperature after thermal runaway takes place, wherein, various temperature parameters both can adopt first temperature sensor to continue to measure, also can adopt other temperature sensor to measure, technical staff in the art can select according to the demand, do not limit here.
The first temperature sensor and the second temperature sensor have different functions, and therefore can be located at different positions in the experiment cavity according to the requirements of acquiring the temperature information of the target object and acquiring the environmental temperature information of the experiment cavity, and are not limited herein. The first temperature sensor and the second temperature sensor can both adopt thermocouples, for example, the first temperature sensor can adopt a main thermocouple, the second temperature sensor can adopt a following thermocouple, the specific number is customized by a user, and sintering packaging can be carried out after the number is determined.
The first and second temperature sensors may be electrically connected by first and second temperature sensor harnesses 18, 20, respectively, that penetrate the cartridge body and communicate to the experimental internal cavity and the external environment. Still seted up reserve temperature sensor pencil on the storehouse body and worn hole 27, when still having other temperature information acquisition demands in the experiment inner chamber, can set up corresponding temperature sensor to utilize reserve temperature sensor pencil to wear to establish the temperature sensor pencil through hole 27, be connected with corresponding temperature sensor electricity. The rest electric devices in the experimental cavity can be electrically connected through an electrifying circuit 19 which penetrates through the bin body and is communicated to the experimental cavity and the external environment, and the electrical connection comprises functions of power supply, data transmission and the like, and is not limited herein.
The bin body can be provided with two opposite bin openings, the two bin openings are respectively provided with an independent bin door 2, the support 7 is provided with a hydraulic cylinder 8 and a hydraulic tank 21, and the hydraulic cylinder 8 and the hydraulic tank 21 can respectively control different hydraulic push-pull rods 4 to open or close the bin doors 2. The heat insulation experiment bin can be divided into three sections, two bin doors 2 respectively form one section, the bin body can form one section, each section can automatically control the vacuum degree of each section to be not less than 97% in the experiment process, and other arrangement forms can be adopted without limitation. The outer surface of the heat insulation experiment bin can be coated with heat insulation materials or heat insulation materials.
The bin body is provided with a door flange base 22, a sealing gasket 23 and sealing teeth 24 which are matched with the bin door 2, so that the bin door 2 and the bin opening are assembled in a sealing mode. The bin door positioning device 1 is arranged on the bin body, the bin door 2 is positioned and assembled on the bin body through the bin door positioning device 1, the door handle 3 is arranged on the bin door 2, and the bin door 2 moves relative to the bin body through the hydraulic push-pull rod 4 so as to open or close the bin opening. The bin body is supported by a bracket 7, so that the bin body is stably placed on the ground.
And the bin body is also provided with a gas sampling hole 28, a spraying fire extinguishing agent hole 29, a vacuum sleeve air inlet 30, a vacuum sleeve exhaust hole 31, an air inlet and outlet hole 33, a light supplementing hole 34 and other through hole structures which are communicated with the experimental inner cavity so as to meet different requirements in the experimental process. Typically, a line may branch from the gas sampling port 28 into the exhaust stack 12, and a manual valve may be provided in the line connecting the two. The light compensating hole 34 includes a lens, a lens protection cover, a light source, a condenser cover, etc. therein, and may be formed at an angle with respect to the observation window 14. And the bin body is also provided with an inspection hand hole 32 communicated with the interlayer cavity, and the inspection hand hole 32 can be used for replacing the heating device 25 in an emergency. The storehouse body is provided with smoke and dust collecting hole 5, is provided with head flange 10 on the smoke and dust collecting hole 5, and then realizes the sealed of smoke and dust collecting hole 5 through head flange 10, operates head flange 10 again and opens smoke and dust collecting hole 5 when needing. The end flange 10 can be externally connected with a manual high-temperature sealing valve and then an exhaust chimney 12 for emergency exhaust.
In one embodiment, the temperature information of the target object includes surface temperature information of the target object, and the environment temperature information of the experimental cavity includes inner wall temperature information of the inner shell. Therefore, at least one first temperature sensor is arranged on the surface of the target object and used for acquiring the surface temperature information of the target object, and at least one second temperature sensor is arranged on the inner wall of the inner shell and used for acquiring the inner wall temperature information of the inner shell.
In one embodiment, the experimental lumen has a central spatial region and a peripheral spatial region surrounding the central spatial region; have target bearing support in the experiment inner chamber of the storehouse body, the target object sets up on the target bearing support, just the target object passes through target bearing support is located the central space region of experiment inner chamber, in one of them embodiment, heating device 25 includes the heater strip, the heater strip evenly twines on the interior casing and is covered with the intermediate layer chamber, the regional temperature of central space is comparatively balanced, consequently can make the target object heat up based on balanced temperature. Target bearing support can be used for bearing target object, for example target bearing support can be used for the bearing to treat the lithium cell of experiment, wherein, can also set up the mica plate on the target bearing support, and then places the lithium cell on the mica plate, sets up on target bearing support through the bearing interval of mica plate.
In one embodiment, the adiabatic experimental chamber comprises at least one pressure sensor disposed on the chamber body for acquiring pressure information of the experimental lumen. The pressure sensor comprises a first pressure sensor 11 and a second pressure sensor 13, the first pressure sensor 11 and the second pressure sensor 13 are arranged at the top of the bin body side by side, an exhaust chimney 12 is arranged on the bin body, and the exhaust chimney 12 is positioned between the first pressure sensor 11 and the second pressure sensor 13.
In one embodiment, the adiabatic experiment chamber comprises at least one laser smoke density sensor, the laser smoke density sensor can adopt a smoke temperature thermocouple, and the laser smoke density sensor can be arranged on the chamber body through a laser smoke density sensor bracket 15 and used for acquiring smoke density information of the experiment inner chamber. Laser smoke density sensor includes first laser smoke density sensor 16 and second laser smoke density sensor 17, and first laser smoke density sensor 16 and second laser smoke density sensor 17 set up side by side the front portion of the storehouse body, seted up the perspective on the storehouse body the observation window 14 of experiment inner chamber, and observation window 14 is located between first laser smoke density sensor 16 and the second laser smoke density sensor 17.
In one embodiment, the bin body is provided with a pressure relief opening communicated with the experiment inner cavity, and the pressure relief opening is provided with a pressure relief valve 6. The pressure release valve 6 can protect the bin body of the heat insulation experiment bin from damaging the bin body due to thermal runaway eruption, combustion or explosion of the lithium battery.
In one embodiment, the adiabatic experiment chamber comprises a vacuum extractor 9 disposed on the chamber body, and the vacuum extractor 9 is communicated with the experiment inner chamber and used for adjusting the vacuum state of the experiment inner chamber. The bin body is provided with a vacuum meter 26, the vacuum meter 26 is communicated with the experiment inner cavity, the vacuum meter 26 is used for acquiring vacuum degree information in the experiment inner cavity, and then the auxiliary vacuumizing device 9 is used for adjusting the vacuum state in the experiment inner cavity.
When the target object is a battery, the battery can be completely charged and discharged for 3 times, the battery capacity is calibrated, the battery is ensured to work normally, and the battery is adjusted to a preset charge state. Thoroughly clean adiabatic experiment storehouse, heat adiabatic experiment storehouse to 250 ℃ and open air intake and exhaust valve, the temperature of experiment inner chamber is stabilized and is kept 3 hours at 250 ℃, ensures that last time eruption residue volatilizees in adiabatic experiment storehouse and finishes, closes air intake and exhaust valve. And after the completion, opening a bin door 2 of the heat insulation experiment bin, and after the heat insulation experiment bin is cooled, thoroughly cleaning lithium from the dust in the heat insulation experiment bin by using a dust collector.
Put the battery of experiment in adiabatic experiment storehouse, set up the observation window 14 that the position can correspond adiabatic experiment storehouse, whether each electric device work of inspection adiabatic experiment storehouse is normal, close door 2 in adiabatic experiment storehouse, close all valves of admission and exhaust, the inspection gas tightness, wherein, the hatch door can be closed earlier in the gas tightness inspection process, close the admission and exhaust valve, it is 500kPa to fill compressed air to the static pressure in the adiabatic experiment storehouse, keep this pressure for 1 hour, if the air leakage rate is less than 1%, then consider that the gas tightness satisfies the experimental requirement, if the unsatisfied experimental requirement of gas tightness, need carry out the gas tightness to adiabatic experiment storehouse and overhaul.
Adjusting the atmosphere in the heat insulation experiment bin, adjusting the temperature in the heat insulation experiment bin to 25 ℃ and keeping the temperature constant, vacuumizing the air in the heat insulation experiment bin to 50KPa, and then filling N2The gas pressure in the experimental lumen was restored to 101 KPa.
Starting a data acquisition module, setting acquisition frequency, acquiring detection signal data, selecting heating power of a heating device 25 according to needs, starting the heating device 25 until thermal runaway is caused, judging the thermal runaway according to that the temperature rise rate dT/dT of a monitoring point is more than or equal to 1 ℃/s and lasts for more than 3s, and stopping the heating device 25 after the thermal runaway is detected. When all batteries are out of control thermally, and the absolute value abs (dP/dt) of the pressure rise rate in the heat insulation experiment chamber is less than or equal to 5KPa/min and lasts for more than 3min, stopping data acquisition, closing the heating device 25, starting the exhaust system of the heat insulation experiment chamber, exhausting the gas in the experiment chamber into the ventilation and purification system of the experiment chamber, opening the heat insulation experiment chamber after the ambient temperature of the experiment chamber is reduced to room temperature, moving out the batteries of the experiment, and ending the experiment.
After the experimental data is acquired, normalization processing can be performed on the measured signal values, comparison on a time axis is facilitated, normalization is adopted, and a person skilled in the art can select to use the experimental data according to requirements without limitation.
In one embodiment, the insulation experiment chamber can be used for carrying out low-temperature tests, for example, ultralow-temperature gas flowing through an external cold source evaporator is introduced into the experiment inner chamber by using an air inlet and exhaust system to cool the experiment inner chamber, and meanwhile, cold energy flows through the interlayer chamber of the insulation experiment chamber to control the temperature of the inner wall of the experiment inner chamber, so that the setting of a low-temperature environment is realized. Specifically, can accomplish the interior installation of battery capacity settlement and the storehouse of battery according to the experiment purpose, detect whether each electrical part normally works, introduce the intermediate layer chamber in adiabatic experiment storehouse with the cold wind of outside air conditioner, through the inner wall temperature of second temperature sensor perception experiment inner chamber, until reaching the temperature of settlement.
It should be noted that the introduced cold air needs to be sufficiently dried to avoid condensation or freezing, the temperature of the experimental inner cavity is reduced to a set value, then the temperature of the interlayer cavity is reduced to a set value, at this time, the heating device 25 can be started, and meanwhile, the input cold energy is fed back in real time to ensure that the air temperature of the experimental inner cavity is always the set value, the error is not more than 5%, for example, the temperature is set to-20 ℃, and the temperature of the experimental inner cavity is between (-19 ℃ and-21 ℃).
In order to ensure that the experiment is carried out quickly and accurately, the environmental temperature of the inner cavity of the experiment is controlled to be between 15 and 20 ℃, and when the battery is detected to be sprayed, cold air supply is stopped quickly, and the heat insulation experiment bin is ensured to be completely sealed.
The invention provides a thermal runaway experimental method, which comprises the following steps: providing an insulated experimental chamber; acquiring the environmental temperature information of the experimental inner cavity and the temperature information of the target object, and adjusting the environmental temperature of the experimental inner cavity and the temperature of the target object to be consistent according to the environmental temperature information of the experimental inner cavity and the temperature information of the target object; and increasing the ambient temperature of the experimental cavity, and further increasing the temperature of the target object.
In one embodiment, as shown in fig. 4, when the thermal runaway experimental method is implemented by using the above-mentioned adiabatic experimental chamber, the following steps can be referred to:
assuming that the first temperature sensor is a main thermocouple and the second temperature sensor is a following thermocouple, the main thermocouple is arranged to monitor and test the surface temperature of the lithium battery and is marked as Tcell,sFollowing the thermocouple to monitor the environmental temperature of the experimental cavity, and the average temperature is recorded as Tchamber,aveThe working process is as follows:
setting the heating temperature rise rate of the heating device 25, which is described by taking 0.5 ℃/min as an example, setting the temperature rise step length, namely the value of each temperature rise, which is described by taking 5 ℃ as an example, setting the waiting time, namely the time for the waiting mode to last, which is described by taking 20min as an example, and setting the experiment termination temperature TendAnd starting a heating program.
It is judged whether or not the heating device 25 can be turned on, i.e., if the surface temperature T of the battery at that timecell,0＝Tchamber,0Then the next step can be entered; otherwise, wait until T is satisfiedcell,0＝Tchamber,0Or dT orcell,0/dt<0.1 ℃/min, and then the next step is carried out.
The heating device 25 is turned on, the heating device 25 being in accordance with dTchamber,aveThe temperature of the inner wall of the experimental cavity is increased to (Tcchamber, 0+5) DEG C when the temperature is 0.5 ℃/min; if dT is found in the processcell,s/dt>0.5 deg.C/min, immediately increasing the power of the heating device 25 to dTchamber,ave/dt＝dTcell,sdT to dTcell,s0 ℃/min; holding dTchamber,aveDt equals 0, wait until Tcell,0＝Tchamber,0Or dT orcell,0/dt<0.1 ℃/min, and then the next step is carried out. If dT is not found in the processcell,s/dt>0.5 ℃/min, the heating device 25 raises the temperature of the inner wall of the experimental cavity to (Tcchamber, 0+5) DEG C, and then enters a waiting mode. Holding dTchamber,ave0/dt, wait 20 minutes or Tcell,s＝Tchamber,aveOr dT orcell,s/dt<0.1 ℃/min, and then the next step is carried out.
Repeating the steps after the heating device 25 is turned on until Tcell,s>TendAnd the experiment is ended.
If T is found in the above processair>300℃(TairThe ambient temperature of the experimental cavity) to indicate that the thermal runaway of the experimental battery occurs, the heating device 25 rapidly raises the temperature of the inner cylinder to 280 ℃, keeps the temperature until the change rate of the gas pressure in the experimental cavity is less than 5kpa/min (indicating that the thermal runaway of the battery is finished), and stops the heating device 25 (if the ambient temperature of the experimental cavity exceeds 300 ℃, a forced air cooling measure is immediately started. Wherein, forced air cooling measure can pour into the experiment inner chamber into with normal atmospheric temperature high-pressure air from the one end in adiabatic experiment storehouse, get rid of from the other end nature, and the process of admitting air and exhausting all needs the drying, prevents that the inner wall of experiment inner chamber from leaving steam.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An insulated test chamber, comprising:
the bin body comprises an inner shell and an outer shell, a sandwich layer cavity is arranged between the outer shell and the inner shell, the inner shell is provided with an experiment inner cavity, the experiment inner cavity is configured to be used for placing a target object, a bin opening communicated with the experiment inner cavity is formed in the bin body, and a bin door is arranged on the bin opening;
a heating device disposed within the interlayer cavity;
at least one first temperature sensor disposed in the experimental lumen, the first temperature sensor configured to acquire temperature information of a target object;
at least one second temperature sensor disposed in the experimental lumen, the second temperature sensor configured for acquiring ambient temperature information of the experimental lumen.
2. The adiabatic experimental bin of claim 1, wherein the temperature information of the target object includes surface temperature information of the target object; and/or the presence of a gas in the gas,
the environmental temperature information of the experiment inner cavity comprises the inner wall temperature information of the inner shell.
3. The adiabatic experimental bin of claim 2, wherein at least one of the first temperature sensors is disposed on a surface of a target object for acquiring surface temperature information of the target object; and/or the presence of a gas in the gas,
at least one second temperature sensor is arranged on the inner wall of the inner shell and used for acquiring the temperature information of the inner wall of the inner shell.
4. The insulated experimental bin of claim 1 wherein the experimental lumen has a central spatial region and a peripheral spatial region surrounding the central spatial region;
a target bearing support is arranged in an experiment inner cavity of the bin body, the target object is arranged on the target bearing support, and the target object is located in a central space area of the experiment inner cavity through the target bearing support.
5. The adiabatic experimental bin of claim 1, wherein the heating means includes heating wires uniformly wound around the inner housing and distributed throughout the sandwich chamber.
6. The adiabatic experimental bin of any one of claims 1 to 5, wherein the adiabatic experimental bin comprises:
the pressure sensor is arranged on the bin body and used for acquiring pressure information of the experimental inner cavity.
7. The adiabatic experimental bin of any one of claims 1 to 5, wherein the adiabatic experimental bin comprises:
the laser smoke density sensor is arranged on the bin body and used for acquiring smoke density information of the experimental inner cavity.
8. The heat insulation experiment bin according to any one of claims 1 to 5, wherein a pressure relief opening communicated with the experiment inner cavity is formed in the bin body, and a pressure relief valve is arranged on the pressure relief opening.
9. The adiabatic experimental bin of any one of claims 1 to 5, wherein the adiabatic experimental bin comprises:
and the vacuumizing device is arranged on the bin body, is communicated with the experiment inner cavity and is used for adjusting the vacuum state of the experiment inner cavity.
10. A thermal runaway experimental method is characterized by comprising the following steps:
providing an insulated experimental chamber;
acquiring the environmental temperature information of the experimental inner cavity and the temperature information of the target object, and adjusting the environmental temperature of the experimental inner cavity and the temperature of the target object to be consistent according to the environmental temperature information of the experimental inner cavity and the temperature information of the target object;
and increasing the ambient temperature of the experimental cavity, and further increasing the temperature of the target object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120761.5A CN114397529A (en) | 2022-02-09 | 2022-02-09 | Adiabatic experiment bin and thermal runaway experiment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120761.5A CN114397529A (en) | 2022-02-09 | 2022-02-09 | Adiabatic experiment bin and thermal runaway experiment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114397529A true CN114397529A (en) | 2022-04-26 |
Family
ID=81233050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210120761.5A Pending CN114397529A (en) | 2022-02-09 | 2022-02-09 | Adiabatic experiment bin and thermal runaway experiment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114397529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115097323A (en) * | 2022-06-01 | 2022-09-23 | 江苏阿拉丁高温材料有限公司 | Lithium ion battery thermal runaway testing arrangement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3050792A1 (en) * | 2017-01-19 | 2018-07-26 | National Research Council Of Canada | Apparatus and method for initiating thermal runaway in a battery |
| CN109116250A (en) * | 2018-08-02 | 2019-01-01 | 公安部天津消防研究所 | A kind of lithium ion battery thermal runaway imitative experimental appliance and measuring method |
| CN213091539U (en) * | 2020-08-11 | 2021-04-30 | 大连捷华船舶科技有限公司 | Thermal-insulated explosion bin device with variable and controllable thermal shock |
| CN216926961U (en) * | 2022-02-09 | 2022-07-08 | 南京清禾新能源科技有限公司 | Adiabatic experiment storehouse and thermal shock experimental system |
-
2022
- 2022-02-09 CN CN202210120761.5A patent/CN114397529A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3050792A1 (en) * | 2017-01-19 | 2018-07-26 | National Research Council Of Canada | Apparatus and method for initiating thermal runaway in a battery |
| CN109116250A (en) * | 2018-08-02 | 2019-01-01 | 公安部天津消防研究所 | A kind of lithium ion battery thermal runaway imitative experimental appliance and measuring method |
| CN213091539U (en) * | 2020-08-11 | 2021-04-30 | 大连捷华船舶科技有限公司 | Thermal-insulated explosion bin device with variable and controllable thermal shock |
| CN216926961U (en) * | 2022-02-09 | 2022-07-08 | 南京清禾新能源科技有限公司 | Adiabatic experiment storehouse and thermal shock experimental system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115097323A (en) * | 2022-06-01 | 2022-09-23 | 江苏阿拉丁高温材料有限公司 | Lithium ion battery thermal runaway testing arrangement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105074957A (en) | Enclosure for rechargeable batteries | |
| CN108646195A (en) | A kind of battery simulation simulation test machine and its control method | |
| CN208705362U (en) | A kind of explosion-proof tank for battery cycle life test | |
| Liu et al. | Thermal runaway propagation in linear battery module under low atmospheric pressure | |
| CN216926961U (en) | Adiabatic experiment storehouse and thermal shock experimental system | |
| CN109698310B (en) | Pipeline communication type power supply system and safety management method thereof | |
| CN205069780U (en) | Take extinguishing device's lithium ion battery group | |
| CN109585946A (en) | Li-ion batteries piles thermal runaway processing system and method | |
| CN213091539U (en) | Thermal-insulated explosion bin device with variable and controllable thermal shock | |
| CN105830267A (en) | Stability evaluation test device and stability evaluation test method for electric storage device | |
| CN114397529A (en) | Adiabatic experiment bin and thermal runaway experiment method | |
| WO2023065951A1 (en) | Energy storage unit thermal runaway experiment platform and control method therefor | |
| Li et al. | Experimental study on the effect of state of charge on failure propagation characteristics within battery modules | |
| Wei et al. | Experimental study of thermal runaway process of 256Ah prismatic nickel-rich battery | |
| WO2019161574A1 (en) | Safety prevention and control method and device for battery energy storage module | |
| CN113410561A (en) | Design method and device of battery pack, battery pack and vehicle | |
| CN117388738A (en) | Battery thermal runaway testing method and device and electric vehicle system | |
| CN209088022U (en) | Li-ion batteries piles thermal runaway processing system | |
| CN209087944U (en) | Li-ion batteries piles cooling system | |
| CN110465035A (en) | For examining the device and method of LiFePO4 energy-accumulating power station fire extinguishing system validity | |
| CN115792659A (en) | Battery thermal runaway testing device and testing method | |
| CN111638302B (en) | Lithium ion battery fire hazard risk grade classification test detection method | |
| CN111106399B (en) | Design method and system for opening pressure of lithium battery safety valve, safety valve and battery | |
| CN114709508A (en) | Temperature-control fireproof and explosion-proof integrated lithium battery energy storage power station and control method thereof | |
| CN114441977A (en) | Robot battery safety monitoring system and monitoring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |