CN219737349U - Detection device - Google Patents
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- CN219737349U CN219737349U CN202320863152.9U CN202320863152U CN219737349U CN 219737349 U CN219737349 U CN 219737349U CN 202320863152 U CN202320863152 U CN 202320863152U CN 219737349 U CN219737349 U CN 219737349U
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 58
- 238000004088 simulation Methods 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 136
- 239000002245 particle Substances 0.000 claims description 44
- 239000007787 solid Substances 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 2
- 239000000567 combustion gas Substances 0.000 claims 2
- 238000002347 injection Methods 0.000 abstract description 15
- 239000007924 injection Substances 0.000 abstract description 15
- 238000002474 experimental method Methods 0.000 abstract description 12
- 238000004880 explosion Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 3
- 239000007921 spray Substances 0.000 description 22
- 230000009286 beneficial effect Effects 0.000 description 13
- 239000000843 powder Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000008247 solid mixture Substances 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to a detection device, which comprises a fixed bracket for fixing a piece to be detected, wherein a heating piece and a gas spraying piece which are arranged at intervals with the piece to be detected are arranged on the fixed bracket; the heating piece is used for heating the piece to be detected, the gas injection piece is used for generating gas flow to impact the piece to be detected, and the heating piece and the gas injection piece are arranged on the same side of the piece to be detected so as to heat and impact the surface of the same side of the piece to be detected; or the fixed support is provided with a simulation part which is arranged at intervals with the to-be-detected piece, and the simulation part is used for heating the to-be-detected piece and can generate air flow to impact the to-be-detected piece. The utility model can simulate the high-temperature environment and the high-speed airflow impact environment generated during the explosion of the battery, and can detect the high-temperature resistance and the impact resistance of the to-be-detected part by manually observing the change of the to-be-detected part after the simulated high-temperature and high-speed airflow impact environment, so that the explosion test is not required to be performed by using a true battery, and the experiment cost is reduced.
Description
Technical Field
The utility model relates to the technical field of battery safety detection, in particular to a detection device.
Background
New energy electric vehicles gradually start to replace fuel vehicles, and are rapidly developing. In the development of new energy electric vehicles, the safety of the battery is an important factor for restricting the rapid development of the new energy electric vehicles. In a new energy battery car, a battery box as an energy source is installed in the car, and a battery in the battery box is discharged to drive a motor of the new energy car to operate. With the increasing demands of people on new energy automobiles, the demands on the energy density of batteries are also increasing continuously. For high energy battery systems, when a battery or batteries within the battery system are thermally out of control, it can generate high temperature gases, and the high temperature gases form a rapid gas flow that impinges upon the existing insulation and battery pack housing, thereby causing structural thermal and mechanical disassembly of the existing insulation, leading to failure of protection. The high-temperature high-speed air flow rushes through the battery pack box body, so that the battery box body is directly combusted, and continuously combusted, the main body of the new energy automobile is directly damaged, and the safety of passengers is endangered.
Therefore, in order to improve safety, it is necessary to develop a heat-resistant shield for use in a battery pack case for blocking high-temperature, high-speed air flow generated when the battery is thermally out of control, protecting the battery case from the impact of air flow and high-temperature melting, thereby improving the safety performance of the battery. However, the heat insulation evaluation experiment of the heat-resistant protection piece is that the heat-resistant protection piece is put into a battery pack box body and the explosion experiment is carried out by using a true battery, so that the experiment cost is high.
Disclosure of Invention
In view of the above, the present utility model is directed to a detection device, so as to solve the technical problem of high detection cost caused by the need of performing experiments with a true battery when detecting the heat insulation performance of a heat-resistant protection piece in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the detection device is used for detecting the heat insulation effect of the to-be-detected piece and comprises a fixed bracket used for fixing the to-be-detected piece, wherein a heating piece and a gas spraying piece which are arranged at intervals with the to-be-detected piece are arranged on the fixed bracket;
the heating piece is used for heating the piece to be detected;
the gas spraying piece is used for generating gas flow to impact the piece to be tested;
the heating piece and the gas spraying piece are arranged on the same side of the piece to be detected, so as to heat and impact air flow on the surface of the same side of the piece to be detected;
or the fixed support is provided with a simulation component which is arranged at intervals with the to-be-detected piece, and the simulation component is used for heating the to-be-detected piece and can generate airflow to impact the to-be-detected piece.
The beneficial effects of the technical scheme are as follows: the utility model simulates the high-temperature environment generated when the battery is in thermal runaway by heating the to-be-measured piece through the heating piece, and simulates the high-speed air flow impact environment generated when the battery is in thermal runaway by air flow impact to the to-be-measured piece through the air injection piece; or the high-temperature environment and the high-speed airflow impact environment generated when the battery is in thermal runaway can be simulated simultaneously by the simulation component. The high temperature resistance and the impact resistance of the to-be-detected piece can be detected by manually observing the change of the to-be-detected piece after the simulated high temperature and high speed airflow impacts the environment. Compared with the prior art, the method does not need to use a true battery to carry out the explosion test, and reduces the experiment cost.
Further, the heating element is one of a burner, an electric heater, an electromagnetic heater or a plasma heater; the gas jet member is a gas jet.
The beneficial effects are that: the heating piece and the gas spraying piece can all adopt common equipment in the prior art, and the equipment types that the heating piece can adopt are more, and the material is more easily obtained, so that the detection of the heat-resistant protection piece is easier to realize.
Further, the simulation component is provided with a combustible gas interface, a combustion-supporting gas interface, a compressed air interface and a nozzle, and a combustible gas pipeline which is communicated with the combustible gas interface and the nozzle, a combustion-supporting gas pipeline which is communicated with the combustion-supporting gas interface and the nozzle and a compressed air pipeline which is communicated with the compressed air interface and the nozzle are arranged in the simulation component; the combustible gas interface is communicated with the combustible gas storage source through a combustible gas pipe, the combustion-supporting gas interface is communicated with the combustion-supporting gas storage source through a combustion-supporting gas pipe, and the compressed gas interface is communicated with the compressed gas storage source through a compressed gas pipe.
The beneficial effects are that: the simulation component can integrate the heating function and the air flow spraying function, and correspondingly simplifies the structure of the whole detection device; in addition, in the simulation part, the full combustion of the combustible gas can be realized, and meanwhile, the temperature of the heating to-be-detected piece and the air flow impact strength of the to-be-detected piece can be controlled.
Further, the detection device further comprises a gas flow controller, and the gas flow controller comprises a flow sensor for correspondingly measuring the combustible gas flow, the combustion-supporting gas flow and the compressed gas flow and a flow display capable of displaying the combustible gas flow, the combustion-supporting gas flow and the compressed gas flow at the same time.
The beneficial effects are that: the flow speed and the flow quantity of various gases are convenient to precisely control, and the heating temperature and the impact strength of the air flow to the to-be-detected member are further controlled.
Further, the detection device further comprises a particle providing component, wherein the particle providing component is used for providing solid particles and is connected with the heating component or the simulation component so that the solid particles are sprayed to the surface of the to-be-detected component along with the airflow.
The beneficial effects are that: after the particle providing component provides solid particles, the solid particles can be sprayed to the surface of the to-be-detected member along with the air flow, so that the solid particles possibly generated by the battery under the battery explosion working condition can be simulated to form a high-speed gas-solid mixture along with the air flow, and the authenticity and accuracy of the detection device for evaluating the safety protection performance of the to-be-detected member are improved.
Further, the fixed support comprises a support body and a support member arranged on the support body, an opening is formed in the support member, and the to-be-detected piece is clamped at the opening.
The beneficial effects are that: the displacement of the to-be-measured piece caused by overlarge impact of high-speed air flow is avoided, and the to-be-measured piece is ensured to be clamped stably.
Further, the opening has the same shape as the to-be-measured piece and has a smaller size than the to-be-measured piece.
The beneficial effects are that: the multi-edge clamping device can clamp and fix multiple edges of the to-be-tested piece on the supporting member, and ensures more stable clamping of the to-be-tested piece.
Further, the distance between the heating element or the gas spraying element or the simulation element or the particle providing element and the fixing frame of the element to be measured is adjustable.
The beneficial effects are that: the position of the piece to be detected relative to the heating piece, the gas injection piece or the simulation part and the particle providing part can be adjusted, so that the piece to be detected can be positioned at the most proper detection position, and the detection accuracy is improved.
Further, the detecting device further comprises a pressure sensor for detecting the impact strength of the air flow to the to-be-detected member.
The beneficial effects are that: the pressure sensor is arranged to measure the real-time airflow impact force born by the to-be-measured piece, and meanwhile, the detector can adjust the flow of the corresponding gas according to the pressure value detected by the pressure sensor.
Further, the to-be-measured member has a fire facing surface which is a surface of the to-be-measured member facing the heating member, the gas injection member, the simulation member, or the particle providing member, and a back facing surface which is a surface of the to-be-measured member facing away from the heating member, the gas injection member, the simulation member, or the particle providing member, and the detection head of the pressure sensor is disposed on the back facing surface and is opposite to the gas injection member or the simulation member in position, and is used for detecting impact strength of the gas flow to the to-be-measured member.
The beneficial effects are that: the pressure sensor is arranged at the position and can accurately measure the real-time airflow impact force born by the to-be-measured piece.
Further, the supporting member is slidably arranged on the frame body, a pressure sensor is arranged on one side, facing away from the gas injection piece or the simulation component, of the sliding connection position of the supporting member and the frame body, and the pressure measured by the pressure sensor at the sliding connection position of the supporting member and the frame body after the airflow impact force received by the piece to be measured is transmitted through the supporting member represents the real-time airflow impact force received by the piece to be measured.
The beneficial effects are that: the temperature at the sliding connection position of the supporting component and the frame body is low relative to the temperature of the back surface of the to-be-detected piece, and the pressure sensor is arranged at the position, so that the high-temperature-resistant pressure sensor is not necessary, the construction cost of the detection device can be reduced, and the real-time airflow impact force born by the to-be-detected piece can be accurately measured.
Further, the detecting device further comprises a first temperature sensor, the to-be-detected member is provided with a fire facing surface and a back fire facing surface, the fire facing surface is the surface of the to-be-detected member facing the heating member, the gas injection member, the simulation member or the particle providing member, the back fire facing surface is the surface of the to-be-detected member facing away from the heating member, the gas injection member, the simulation member or the particle providing member, and the detecting head of the first temperature sensor is used for being arranged on the fire facing surface.
The beneficial effects are that: the first temperature sensor can detect the real-time temperature of the fire facing surface of the to-be-detected piece, and meanwhile, a detector can adjust heating conditions such as heating time, heating temperature and the like of the heating piece or the simulation component according to the temperature value detected by the first sensor.
Further, the detection device further comprises a second temperature sensor, and the second temperature sensor detection head is used for being arranged on the backfire surface.
The beneficial effects are that: the second temperature sensor can detect the temperature on the back fire surface of the to-be-detected piece, and the temperature difference between the back fire surface and the fire facing surface of the to-be-detected piece under the impact of short-time high temperature and air flow can be calculated through the temperature difference value measured by the second temperature sensor, so that the short-time heat insulation performance of the to-be-detected piece is evaluated.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of a detecting device of the present utility model;
FIG. 2 is a schematic structural view of an embodiment 2 of the detecting device of the present utility model;
fig. 3 is an enlarged view at a in fig. 2.
Reference numerals illustrate: the device comprises a 1-fixed support, a 2-support body, a 3-supporting member, a 4-sliding rail, a 5-gas flow controller, a 6-compressed air storage bottle, a 7-combustible gas storage bottle, an 8-combustion-supporting gas storage bottle, a 9-thermocouple test bench, an 11-combustible gas pipe, a 12-combustion-supporting gas pipe, a 13-compressed gas pipe, a 14-test platform, a 15-spray gun, a 16-first temperature sensor, a 17-second temperature sensor and an 18-pressure sensor.
Detailed Description
The utility model is described in further detail below with reference to the drawings and detailed description.
Example 1 of the detection device of the present utility model:
reference to a battery in accordance with an embodiment of the present utility model refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present utility model may include a battery module or a battery pack, or the like. The battery cell may include a lithium metal battery, a sodium metal battery, a magnesium metal battery, or the like, which is not limited by the embodiment of the present utility model. The battery cell may be in a cylindrical, flat, or other shape, and the embodiment of the utility model is not limited thereto. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment. For convenience of explanation, the following examples will be described with reference to lithium metal batteries.
Batteries generally include a housing for enclosing one or more battery cells, the housing being configured to prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. In a new energy battery car, a battery box as an energy source is installed in the car, and a battery in the battery box discharges to drive a motor of the new energy car to operate. With the increasing demands of people on new energy automobiles, the demands on the energy density of batteries are also increasing continuously. For high energy battery systems, when the battery or batteries within the battery system are thermally out of control, they can generate high temperature gases, and the high temperature gases form a rapid gas flow that impinges on the existing insulation and battery pack housing, causing structural thermal and mechanical disintegration of the existing insulation, leading to failure of the protection. The high-temperature high-speed air flow rushes through the battery pack box body, so that the battery box body is directly combusted, and continuously combusted, the main body of the new energy automobile is directly damaged, and the safety of passengers is endangered.
Therefore, in order to improve safety, it is necessary to develop a heat-resistant shield for use in a battery pack case for blocking high-temperature, high-speed air flow generated when the battery is thermally out of control, protecting the battery case from the impact of air flow and high-temperature melting, thereby improving the safety performance of the battery. However, the experiment on the newly developed heat-resistant protection piece is to put the newly developed heat-resistant protection piece into a battery pack box body to carry out the explosion experiment by using a true battery, the experiment cost is high, and a detection device for simulating the experiment process is not used for evaluating the safety protection performance of the heat-resistant protection piece. The detection device provided by the utility model simulates the working condition of thermal runaway of the battery under the condition of using a true battery to carry out a blasting experiment, so that the safety protection performance of the to-be-detected piece is evaluated, and the detection cost of the heat-resistant protection performance of the to-be-detected piece is reduced.
As shown in fig. 1, the detecting device includes a fixed bracket 1 and a dummy member mounted on the fixed bracket 1. The fixed support 1 is formed by constructing profile steel and used for positioning and fixing a piece to be detected, the fixed support 1 comprises a support body 2 and a support member 3 arranged on the support body 2, an opening which is identical to the piece to be detected in shape and smaller than the piece to be detected in size is formed in the support member 3, and the piece to be detected is clamped at the opening.
In this embodiment, the simulation component is a spray gun 15, the structure of the spray gun 15 is the prior art, and the structure is the same as that of the air-assisted supersonic flame spray gun disclosed in the chinese patent with the publication number CN214168098U, and will not be described in detail here. The spray gun 15 can heat the piece to be tested to simulate the high-temperature environment generated when the battery is in thermal runaway; meanwhile, the spray gun 15 can also generate air flow to impact the to-be-tested piece so as to simulate the high-speed air flow impact environment generated during the thermal runaway of the battery.
The spray gun 15 is provided with a combustible gas interface, a combustion-supporting gas interface, a compressed air interface and a nozzle, and a combustible gas pipeline communicated with the combustible gas interface and the nozzle, a combustion-supporting gas pipeline communicated with the combustion-supporting gas interface and the nozzle and a compressed air pipeline communicated with the compressed air interface and the nozzle are arranged in the spray gun. As shown in fig. 1, the detecting device further comprises a combustible gas storage bottle 7 communicated with the combustible gas interface through a combustible gas pipe 11, a combustion-supporting gas storage bottle 8 communicated with the combustion-supporting gas interface through a combustion-supporting gas pipe 12, and a compressed gas storage bottle 6 communicated with the compressed gas interface through a compressed gas pipe 13. In practical application, the combustible gas can adopt methane and/or acetylene and/or butane and the like, and the high temperature is provided by burning the combustible gas as a thermal environment in the evaluation of the detection device, so as to heat the to-be-detected piece. The combustion-supporting gas can use oxygen, so that the problems of insufficient combustion and small air flow impact on the to-be-detected member caused by too high concentration of the combustible gas can be solved, the combustible gas can be combusted more fully, and meanwhile, the high-speed hot air flow is generated to impact the to-be-detected member by controlling the flow rates of the combustion-supporting gas and the combustible gas. In addition, in practice, there may be a problem of too high temperature when the combustible gas is fully combusted, for example, the combustion temperature of acetylene in air may reach 2100 ℃, the combustion temperature in oxygen may reach 3600 ℃, and the full combustion temperature of the combustible gas exceeds the current true explosion temperature of the battery. Therefore, the temperature of the to-be-measured piece can be adjusted and heated by controlling the flow rate of the compressed air, and the impact strength of the generated air flow to the to-be-measured piece is controlled by controlling the flow rate of the compressed air.
The detection device also comprises a gas flow controller 5, wherein the gas flow controller 5 is in the prior art, and comprises a flow sensor for correspondingly measuring the flow of the combustible gas, the flow of the combustion-supporting gas and the flow of the compressed gas and a flow display capable of displaying the flow of the combustible gas, the flow of the combustion-supporting gas and the flow of the compressed gas at the same time; the specific structure and operation of the gas flow controller will not be described in detail herein. In the use process, the flow rate of each gas is controlled, the combustion temperature and/or the flow velocity of the gas flow are controlled, and then the impact strength of the gas flow on the to-be-detected member is controlled, wherein the detection range of the gas flow sensor is 0-1000MPa, and the detection range of the gas flow sensor is 0-100m 3 /s。
In addition, when the battery is in thermal runaway, solid particles generated by the battery possibly form a high-speed gas-solid mixture along with the airflow, and in order to detect the performance of the to-be-detected member more truly and accurately, the detection device further comprises a particle providing component, wherein the particle providing component comprises a powder storage bottle and a powder feeding pipeline, the powder storage bottle is communicated with the powder feeding pipeline, and the particle providing component is used for providing the solid particles. The spray gun 15 is internally provided with a powder feeding runner, the spray gun 15 is provided with a powder feeding needle opening communicated with the powder feeding runner, a powder feeding pipeline of the particle providing component is connected with the powder feeding needle opening, and enters the spray gun through the powder feeding runner, so that solid particles are finally sprayed to the surface of a piece to be tested along with air flow. In a specific embodiment, the solid particles used by the particle providing component are determined according to the solid particle components formed by the actual combustion of the thermal runaway of the battery, the particle size of the solid particles is 10-100 mu m, the solid particles comprise a mixture of solid particles which are fusible at 1000-2000 ℃ and solid particles which are not fusible at 2000 ℃, nickel powder is used as the fusible solid particles, tungsten carbide powder is used as the non-fusible solid particles, the solid particles impact the workpiece to be tested along with the airflow in the hot airflow impact process at 1000-2000 ℃, the nickel powder is fused to be adhered to the workpiece to be tested along with the tungsten carbide, and the impact strength of the solid particles on the workpiece to be tested along with the airflow and the impact of the solid particles on the safety protection performance of the workpiece to be tested are evaluated more truly and accurately.
In actual detection, the spray gun 15 and the support member 3 are arranged at intervals, the frame body 2 is provided with the slide rail 4, and the support member 3 is in sliding fit with the slide rail 4, so that the distance between the support member 3 and the spray gun 15 is adjusted, after adjustment is finished, the support member 3 is fixed by the fastening bolts, and the firm solidity of a piece to be detected can be ensured, so that the piece to be detected does not shift in the test process. Of course, in other embodiments, the support member 3 may be fixed to the frame 2, and the position of the spray gun 15 on the frame 2 may be adjusted. Because the to-be-tested piece bears high temperature in the testing process, the supporting member 3 adopts an alloy section capable of resisting high temperature of more than 800 ℃.
The surface of the part to be measured facing the spray gun 15 is defined as a fire facing surface, and the surface facing away from the spray gun 15 is defined as a back facing surface. In order to control the heating temperature and the impact pressure of the workpiece more easily, the detecting device further includes a pressure sensor 18, a first temperature sensor 16, and a second temperature sensor 17. The detecting head of the pressure sensor 18 is disposed on the backfire surface of the workpiece and opposite to the position of the spray gun 15, for detecting the impact strength of the air flow on the workpiece. The detection range of the pressure sensor 18 is 0MPa-100MPa, the dynamic frequency response is 60kHz-250kHz, the instantaneous bearing temperature is 1500 ℃, and the shell of the pressure sensor 18 is made of stainless steel. Since the air flow generated by the inspection device is sprayed onto the part to be inspected in a hot environment, the pressure sensor 18 needs to be able to instantaneously withstand high temperatures. The pressure sensor 18 is communicatively coupled to the test platform 14 to display an indication of the pressure detected by the pressure sensor 18 on the test platform 14 in real time.
The detecting head of the first temperature sensor 16 should be disposed on the fire facing surface of the to-be-detected member, and is used for measuring the temperature of the fire facing surface of the to-be-detected member. The detecting head of the second temperature sensor 17 should be arranged on the back fire surface of the to-be-detected piece, and should be opposite to the position of the heating piece or the simulation part, and is used for measuring the temperature of the back fire surface of the to-be-detected piece, and the temperature difference between the back fire surface and the fire facing surface of the to-be-detected piece under the short-time high-temperature airflow impact can be calculated through the temperature difference measured by the temperature difference between the back fire surface and the first temperature sensor 17, so that the short-time heat insulation performance of the to-be-detected piece is estimated. In this embodiment, the first temperature sensor 16 and the second temperature sensor 17 are gas thermocouples, and the detection range is 25-1800 ℃. The frame body 2 is provided with a test platform 14, and the first temperature sensor 16 and the second temperature sensor 17 are both in communication connection with the test platform 14 so as to display temperature readings detected by the two temperature sensors on the test platform 14 in real time.
The utility model can heat the piece to be tested and impact the air flow at high speed through the spray gun 15, and simulate the high temperature environment and the high-speed air flow impact environment generated when the battery is in thermal runaway; after the spray gun 15 is connected with the particle providing component, solid particles impact the to-be-tested piece along with the airflow, and the environment of the solid particles generated when the battery is exploded is simulated. The high temperature resistance and the impact resistance of the to-be-detected piece can be detected by manually observing the change of the to-be-detected piece after the simulated high temperature and high speed airflow impacts the environment. Compared with the prior art, the method does not need to use a true battery to carry out the explosion test, and reduces the experiment cost.
Example 2 of the detection device of the present utility model:
the difference between this embodiment and the above embodiment 1 is that: in this embodiment, as shown in fig. 2 and 3, a slide rail 4 is disposed on a frame body 2, a supporting member 3 is slidably matched with the slide rail 4, a bolt is not provided to fix the supporting member 3, a pressure sensor is disposed on a side of a joint of the supporting member 3 and the slide rail 4, which faces away from a spray gun 15, the pressure sensor is fixed on the slide rail 4, and the pressure measured by the pressure sensor 18 after the airflow impact force received by the workpiece is transmitted through the supporting member 3 represents the real-time airflow impact force received by the workpiece. Because the test piece will bear high temperature in the test process, therefore surrounding environment also can receive high temperature environment influence, set up pressure sensor in the junction of support member 3 and slide rail 4 can effectively measure the real-time air current impact force that awaits measuring the piece and because there is the distance from the piece that awaits measuring, ambient temperature reduces to some extent, consequently pressure sensor 18 uses conventional pressure sensor can, need not to use high temperature resistant pressure sensor to reduce the cost of detection device construction.
Example 3 of the detection device of the present utility model:
this embodiment differs from embodiment 1 described above in that: in this embodiment, the component for heating the to-be-measured member and the component for performing airflow impact on the to-be-measured member are independent from each other, that is, the detection device in this embodiment includes a heating member and a gas injection member, where the heating member is used for heating the to-be-measured member; the gas jet piece is used for generating gas flow to impact the piece to be tested. During detection, the heating element and the gas spraying element are both fixed on the frame body and are positioned on the same side of the element to be detected. At this time, the particle supplying part is connected with the gas injection member.
The heating element is usually a part for burning solid combustible material or liquid combustible material chemically, such as a common burner in the prior art, and heats the element to be detected by burning coal, petroleum, ethanol, etc., but is not limited thereto, and an electric heater, an electromagnetic heater, a plasma heater, etc. common in the prior art may be used as a thermal environment in evaluation of the detection device to heat the element to be detected. The gas injector is a gas injector commonly known in the art.
The heating element is used for simulating the environment of the real temperature heated by the element to be measured, and in general, the heating element can heat the element to be measured to 1000 ℃ to 2000 ℃, and the specific heating temperature depends on the required temperature environment.
The heating element is not in direct contact with the to-be-detected element, and forms thermal convection to heat the to-be-detected element through the action of the heating element and the air flow of the air injection element, the air flow generated by the air injection element is not in direct contact with the to-be-detected element, the space of the to-be-detected element is impacted by the air flow generated by the air injection element, and the distance between the heating element and the to-be-detected element is 0.5 cm to 5cm.
The gas spraying member generally adopts gas spraying to form gas flow, such as oxygen, compressed air, inert gas and the like, and when the heating member adopts an electric heating component, an electromagnetic heating component or a plasma heating component, the gas spraying member preferably adopts the inert gas to form the gas flow so as to prevent the gas flow adopted by the gas spraying member from reacting with the heating member to influence the service life of the heating member.
It should be noted that the detection device shown in fig. 1 is not limited to the present utility model, and the spray gun 15, the workpiece to be detected, the pressure sensor 18, the first temperature sensor 16, and the second temperature sensor 17 in the detection device in embodiment 1 are horizontally arranged as shown in fig. 1, but in other embodiments, the spray gun 15, the workpiece to be detected, the pressure sensor 18, the first temperature sensor 16, and the second temperature sensor 17 in the detection device may be vertically arranged.
The embodiments of the present utility model described above do not limit the scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model as set forth in the appended claims.
Claims (10)
1. The detection device is used for detecting the heat insulation effect of the to-be-detected piece and is characterized by comprising a fixed bracket for fixing the to-be-detected piece, wherein a heating piece and a gas spraying piece which are arranged at intervals with the to-be-detected piece are arranged on the fixed bracket;
the heating piece is used for heating the piece to be detected;
the gas spraying piece is used for generating gas flow to impact the piece to be tested;
the heating piece and the gas spraying piece are arranged on the same side of the piece to be detected, so as to heat and impact air flow on the surface of the same side of the piece to be detected;
or the fixed support is provided with a simulation component which is arranged at intervals with the to-be-detected piece, and the simulation component is used for heating the to-be-detected piece and can generate airflow to impact the to-be-detected piece.
2. The detection device of claim 1, wherein the heating element is one of a burner, an electric heater, an electromagnetic heater, or a plasma heater; the gas jet member is a gas jet.
3. The detecting device according to claim 1, wherein the simulation component is provided with a combustible gas interface, a combustion-supporting gas interface, a compressed air interface and a nozzle, and a combustible gas pipeline which is communicated with the combustible gas interface and the nozzle, a combustion-supporting gas pipeline which is communicated with the combustion-supporting gas interface and the nozzle and a compressed air pipeline which is communicated with the compressed air interface and the nozzle are arranged in the simulation component; the combustible gas interface is communicated with the combustible gas storage source through a combustible gas pipe, the combustion-supporting gas interface is communicated with the combustion-supporting gas storage source through a combustion-supporting gas pipe, and the compressed gas interface is communicated with the compressed gas storage source through a compressed gas pipe.
4. A test device according to claim 3, wherein the test device further comprises a gas flow controller comprising a flow sensor for measuring the flow of the combustible gas, the flow of the combustion gas and the flow of the compressed gas, respectively, and a flow display capable of displaying the flow of the combustible gas, the flow of the combustion gas and the flow of the compressed gas simultaneously.
5. The apparatus according to any one of claims 1 to 4, further comprising a particle supply member for supplying solid particles, and connected to the heating member or the simulation member so that the solid particles are ejected to the surface of the member to be measured with the air flow.
6. The device according to any one of claims 1 to 4, wherein the fixing bracket comprises a bracket body and a supporting member mounted on the bracket body, an opening is formed in the supporting member, and the piece to be tested is clamped at the opening.
7. The apparatus according to claim 6, wherein a distance between the heating member or the gas ejection member or the simulation member or the particle supply member and the test piece holder is adjustable.
8. The apparatus of claim 6, further comprising a pressure sensor for detecting the impact strength of the air flow on the part to be tested.
9. The apparatus according to claim 5, wherein the detecting means further comprises a first temperature sensor, the part to be detected has a fire-facing surface which is a surface of the part to be detected facing the heating member, the gas ejection member, the simulation member, or the particle supply member, and a back-facing surface which is a surface of the part to be detected facing away from the heating member, the gas ejection member, the simulation member, or the particle supply member, and the detecting head of the first temperature sensor is configured to be disposed on the fire-facing surface.
10. The device of claim 9, further comprising a second temperature sensor having a sensing head for positioning on the backfire face.
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|---|---|---|---|
| CN202320863152.9U CN219737349U (en) | 2023-04-18 | 2023-04-18 | Detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320863152.9U CN219737349U (en) | 2023-04-18 | 2023-04-18 | Detection device |
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