Exhaust simulation device

Abstract

The present application discloses an exhaust simulation device. The exhaust simulation device includes a pipeline, an air source, an exhaust pressure test component, and an intake pressure test component. The first end of the pipeline is used to connect to the internal cavity. The air source is connected to the second end of the pipeline to deliver pressurized gas to the internal cavity through the pipeline. The exhaust pressure test component is connected to the internal cavity, and the exhaust pressure test component is located on the outside of the box. The intake pressure test component is connected to the internal cavity, and the intake pressure test component is located on the inside of the box. In this way, pressurized gas can be delivered to the internal cavity through the air source. When the pressure of the gas in the internal cavity is enough to push open the exhaust valve, the gas in the internal cavity can be discharged through the exhaust port. In this way, the working condition of releasing gas in the internal cavity when a battery placed in the internal cavity loses control is simulated, thereby detecting the exhaust performance of the internal cavity.

Description

Technical Field

[0001] The present application relates to the field of containers, and in particular to an exhaust simulation device. Background Art

[0002] Nowadays, many batteries are shipped in containers. During transportation, the batteries may experience thermal runaway and release gases. If the container's exhaust performance does not meet requirements, the increased gas pressure inside the container may damage the container.

[0003] However, currently there is no device that can simulate battery thermal runaway to release gas inside the box, so as to be used for testing the exhaust performance of the container box.

[0004] To this end, the present application provides an exhaust simulation device to at least partially solve the above-mentioned problems. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Specific Examples section. The Summary of the Invention section of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above technical problems, the present application provides an exhaust simulation device for testing the exhaust performance of a box body connected to an exhaust valve, wherein the box body forms an internal cavity and an exhaust port communicating with the internal cavity; the exhaust valve is movably connected to the box body to open or close the exhaust port;

[0007] The exhaust simulation device includes:

[0008] a pipeline, wherein a first end of the pipeline is used to communicate with the internal cavity;

[0009] a gas source connected to the second end of the pipeline for delivering pressurized gas to the internal cavity through the pipeline;

[0010] An exhaust pressure testing component, the exhaust pressure testing component is connected to the internal cavity, and the exhaust pressure testing component is located outside the box;

[0011] The air intake pressure testing component is connected to the internal cavity and is located on the inner side of the box body.

[0012] According to the exhaust simulation device of the present application, pressurized gas can be delivered to the internal cavity through the gas source. When the pressure of the gas in the internal cavity is able to push open the exhaust valve, the gas in the internal cavity can be discharged through the exhaust port. In this way, the working condition of releasing gas in the internal cavity when the battery placed in the internal cavity is out of control is simulated, and the exhaust performance of the internal cavity is tested. In addition, the staff can obtain the pressure of the gas in the internal cavity both on the inside and outside of the box.

[0013] Optionally, the inflation flow rate is determined based on the speed at which the out-of-control battery generates gas and the temperature change caused by the heat released by the out-of-control battery.

[0014] The gas source is controlled to deliver pressurized gas having a flow rate equal to the inflation flow rate to the internal cavity.

[0015] Optionally, the temperature T1 of the internal cavity and the volume V of the internal cavity at a first time point before the current time point, which is a preset time length Δt, are obtained, and the temperature T2 of the internal cavity at the current time point is obtained.

[0016] The gas flow rate F equivalent to the temperature rise is determined based on T1, V, T2 and Δt. The inflation flow rate is the sum of F and the speed at which the out-of-control battery generates gas.

[0017] Alternatively, F is determined by the formula F=V(T2-T1) / (T1+K) / Δt,

[0018] Where K is a constant.

[0019] Optionally, the exhaust pressure testing component is used to obtain the pressure of the gas in the internal cavity when the exhaust valve is opened, the opening time point of the exhaust valve, and the starting time point when the gas source starts to deliver pressurized gas to the internal cavity.

[0020] Optionally, the exhaust simulation device further includes a pressure relief valve, which is configured to communicate with the internal cavity.

[0021] Optionally, a pressure relief valve is connected to the intake pressure testing member.

[0022] Optionally, the exhaust simulation device further includes a flow valve, which is arranged in the pipeline.

[0023] Optionally, the exhaust simulation device further includes an inflation pressure test component connected to the pipeline.

[0024] Optionally, the exhaust simulation device further includes a plurality of separated sub-pipelines, one end of each sub-pipeline is connected to the gas source, and the other end of each sub-pipeline is connected to the second end of the pipeline.

[0025] Optionally, the box body has an end wall, and the end wall has an exhaust port,

[0026] The exhaust simulation device further includes a blocking component, which is disposed in the box body and sealed to the inner surface of the box body. The blocking component and the end wall are spaced apart to form an internal cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the advantages of the present application more easily understood, the present application briefly described above will be described in more detail with reference to specific embodiments shown in the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the present application and are therefore not to be considered as limiting the scope of protection thereof. The accompanying drawings describe and explain the present application with additional specificity and detail.

[0028] Figure 1 It is a schematic diagram of an exhaust simulation device according to a preferred embodiment of the present application.

[0029] Description of Reference Numerals

[0030] 110: Box 101: Exhaust port

[0031] 102: Internal cavity 103: End wall

[0032] 120: Exhaust valve 130: Pipeline

[0033] 131: First pipeline 132: Second pipeline

[0034] 140: Air source 150: Exhaust pressure test component

[0035] 151: Intake pressure test component 152: Inflation pressure test component

[0036] 160: Pressure relief valve 170: Flow valve

[0037] 180: Sub-pipeline 190: Blocking component

[0038] 200: Flange plate DETAILED DESCRIPTION

[0039] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described to avoid confusion with the present application embodiments.

[0040] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0041] In this document, ordinal numbers such as “first” and “second” cited in this application are merely identifiers and do not have any other meanings, such as a specific order, etc.

[0042] To thoroughly understand the embodiments of the present application, a detailed structure will be provided in the following description. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other embodiments.

[0043] This application provides an exhaust simulation device. The device can simulate the process of transporting batteries via a container housing 110. The device can also simulate the gas release within the container housing 110 during a battery outage, thereby testing the exhaust performance of the container housing 110 during battery outages.

[0044] Please refer to Figure 1 The exhaust simulation device includes a housing 110. The housing 110 has an internal cavity 102 formed therein. The internal cavity 102 is isolated from the external environment. The housing 110 also includes an exhaust port 101 communicating with the internal cavity 102.

[0045] The exhaust simulation device also includes an exhaust valve 120. The exhaust valve 120 is located outside the housing 110 and is movably connected to the housing 110. Thus, the exhaust valve 120 has an open position and a closed position. When the exhaust valve 120 is in the closed position, the exhaust valve 120 closes the exhaust port 101. When the exhaust valve 120 is in the open position, the exhaust valve 120 opens the exhaust port 101. In this position, gas within the internal cavity 102 can be discharged from the internal cavity 102 through the exhaust port 101.

[0046] The exhaust simulation device also includes a pipeline 130 and a gas source 140. The pipeline 130 can be located within the housing. The pipeline 130 and the gas source 140 can be located on the same side of the internal cavity 102. The first end of the pipeline 130 is connected to the internal cavity 102. The outlet of the gas source 140 is connected to the second end of the pipeline 130, which is opposite to the first end. In this way, the gas source 140 is connected to the internal cavity 102 through the pipeline 130. The gas source 140 can deliver pressurized gas to the internal cavity 102 through the pipeline 130, thereby simulating the situation in which the battery placed in the internal cavity 102 discharges gas into the internal cavity 102 when the battery is out of control.

[0047] As pressurized gas is output to the internal cavity 102, the pressure of the gas within the internal cavity 102 gradually increases. When the pressure of the gas within the internal cavity 102 is high enough, the gas within the internal cavity 102 can push the exhaust valve 120 away from the closed position and rotate toward the open position. At this time, the gas within the internal cavity 102 can be discharged from the internal cavity 102 through the exhaust port 101.

[0048] After the exhaust port 101 is opened for a first preset period of time, the gas source 140 can be shut off, thereby ceasing the supply of pressurized gas to the internal cavity 102. After the supply of pressurized gas to the internal cavity 102 ceases for a second preset period of time, the pressure within the internal cavity 102 drops to atmospheric pressure. At this point, the exhaust valve 120 can automatically move to a closed position. At this point, the portion of the housing 110 that constitutes the internal cavity 102 can be inspected. If the portion of the housing 110 that constitutes the internal cavity 102 is not damaged, the exhaust performance of the internal cavity 102 is determined to be acceptable; otherwise, the exhaust performance of the internal cavity 102 is deemed unacceptable. The first and second preset time periods can be set as needed.

[0049] like Figure 1 As shown, the exhaust simulation device further includes an exhaust pressure testing component 150. Exhaust pressure testing component 150 may be a pressure gauge. Exhaust pressure testing component 150 is connected to internal cavity 102 so as to be able to constantly detect the pressure of the gas within internal cavity 102. In this way, the pressure of the gas within internal cavity 102 can be constantly measured.

[0050] It can be understood that in an embodiment not shown, the exhaust pressure testing component may also be a pressure sensor.

[0051] like Figure 1 As shown, the exhaust simulation device further includes an intake pressure testing component 151. This component 151 can be a pressure gauge. It is connected to the internal cavity 102. The intake pressure testing component 151 is located inside the housing 110, on the side of the internal cavity 102 near the pipeline 130. This allows personnel to measure the pressure of the gas within the internal cavity 102 from both inside and outside the housing 110.

[0052] It can be understood that in an embodiment not shown, the intake air pressure testing component may also be a pressure sensor.

[0053] After the gas source 140 delivers pressurized gas to the internal cavity 102 for a period of time, when the pressure of the gas obtained by the staff through the intake pressure test component 151 remains unchanged or the rate of change is lower than the preset rate of change, it can be determined that the internal cavity 102 is leaking. At this time, the exhaust simulation device needs to be repaired. The preset rate of change can be determined in advance through experiments. In this embodiment, pressurized gas can be delivered to the internal cavity 102 through the gas source 140. When the pressure of the gas in the internal cavity 102 is able to push open the exhaust valve 120, the gas in the internal cavity 102 can be discharged through the exhaust port 101. In this way, the working condition of releasing gas in the internal cavity 102 when the battery placed in the internal cavity 102 is out of control is simulated, and the exhaust performance of the internal cavity 102 is then tested. In addition, the staff can obtain the pressure of the gas in the internal cavity 102 both on the inside and outside of the box 110.

[0054] Optionally, the exhaust pressure test component 150 can be used to obtain a reading of the exhaust pressure test component 150 when the exhaust valve 120 is open (that is, the pressure of the gas in the internal cavity 102), the opening time of the exhaust valve 120, and the start time of the gas source 140 starting to supply pressurized gas to the internal cavity 102. Thus, the exhaust pressure test component 150 reading when the exhaust valve 120 is open, the opening time of the exhaust valve 120, and the start time of the gas source 140 starting to supply pressurized gas to the internal cavity 102 can be obtained as needed, thereby providing a data basis for subsequent product development.

[0055] like Figure 1 As shown, the exhaust simulation device also includes a pressure relief valve 160. Pressure relief valve 160 is connected to internal cavity 102. If the gas pressure value obtained by the operator through the intake pressure test component 151 is greater than the maximum preset value, it means that the gas in internal cavity 102 cannot be automatically discharged (for example, when the exhaust valve 120 malfunctions and cannot open). In this case, to avoid explosion, the gas in internal cavity 102 can be discharged through pressure relief valve 160, thereby reducing the pressure of the gas in internal cavity 102. The maximum preset value can be determined in advance through experiments.

[0056] Pressure relief valve 160 is located inside housing 110. It is connected to intake pressure testing member 151. Therefore, when intake pressure testing member 151 detects that the pressure of the gas within internal cavity 102 exceeds a maximum preset value, pressure relief valve 160 promptly discharges the gas from internal cavity 102, thereby preventing an explosion. Furthermore, the exhaust simulation device has a compact structure.

[0057] like Figure 1As shown, the exhaust simulation device further includes an inflation pressure test member 152. The inflation pressure test member 152 is connected to the pipeline 130. Thus, the inflation pressure test member 152 can be used to detect the pressure of the gas delivered to the internal cavity 102 via the gas source 140, thereby providing data basis for subsequent product development.

[0058] Please continue to refer to Figure 1 The gas simulation device also includes a flow valve 170. Both the inflation pressure test component 152 and the flow valve 170 are located within the housing. The flow valve 170 is mounted on the pipeline 130. Along the flow direction of the gas delivered from the gas source 140 to the internal cavity 102, the flow valve 170 is located downstream of the inflation pressure test component 152. This allows for constant measurement of the flow rate of gas delivered from the gas source 140 to the internal cavity 102, providing data for subsequent product development.

[0059] Further preferably, pipeline 130 includes a first pipeline 131 and a second pipeline 132. One end of first pipeline 131 is connected to gas source 140, and the other end is detachably connected to one end of flow valve 170 via a flange plate 200. The other end of flow valve 170 is detachably connected to one end of second pipeline 132 via another flange plate 200. The other end of second pipeline 132 is connected to a sealing member 190, described below, thereby communicating with internal cavity 102. This facilitates maintenance of flow valve 170.

[0060] like Figure 1 As shown, the exhaust simulation device further includes multiple (e.g., two) separate sub-pipelines 180. One end of each sub-pipeline 180 is connected to the gas source 140. The other end of each sub-pipeline 180 is detachably connected to the second end (first pipeline 131) of pipeline 130 via a flange plate 200. This increases the flow rate of gas delivered to pipeline 130.

[0061] The exhaust simulation device also includes a sealing member 190. The box body 110 can be the box body 110 of a container. The box body 110 is a roughly rectangular parallelepiped structure. One end of the box body 110 has an end wall 103. The end wall 103 has an exhaust port 101. The exhaust valve 120 and the exhaust pressure test member 150 are arranged on the outside of the end wall 103. The sealing member 190 is a rectangular plate. The sealing member 190 is arranged in the box body 110 and is sealed to the inner surface of the box body 110 (the inner surface of the top wall of the box body 110, the inner surface of the two side walls and the upper surface of the floor). The sealing member 190 and the end wall 103 are spaced apart to form an internal cavity 102. Sealant is provided around the sealing member 190 to circumferentially seal the gap between the sealing member 190 and the inner surface of the box body 110. The intake pressure test member 151 is arranged on the side of the sealing member 190 away from the end wall 103. Thus, an internal cavity 102 can be formed locally within the container body to simulate the battery out-of-control condition within the internal cavity 102, thereby detecting the exhaust performance of the container body without simulating within the entire body 110, thereby reducing testing costs.

[0062] Alternatively, as Figure 1 As shown, the upper end of exhaust valve 120 is pivotally connected to end wall 103. In the closed position, exhaust valve 120 is tilted relative to the vertical. At this point, along the length of housing 110, the upper end of exhaust valve 120 is closer to the center of housing 110 than the lower end. This allows exhaust valve 120 to remain in the closed position due to its own weight.

[0063] It is understood that in an embodiment not shown, the exhaust simulation device further includes an elastic member connected to the exhaust valve and the housing to apply a force to the exhaust valve to rotate the exhaust valve toward the closed position.

[0064] Alternatively, as Figure 1 As shown, the exhaust port 101 is located at the upper end of the end wall 103. This facilitates exhaust.

[0065] Alternatively, the gas source 140 may be controlled to provide pressurized gas to the internal cavity 102 by the following method. The method includes:

[0066] The inflation flow rate is determined based on the rate at which the out-of-control battery generates gas and the change in ambient temperature caused by the heat released by the out-of-control battery.

[0067] The gas source is controlled to deliver pressurized gas having a flow rate equal to the inflation flow rate to the internal cavity.

[0068] Those skilled in the art will appreciate that during a battery runaway process, the battery generates heat, and the heat released by the battery may cause the ambient temperature of the space where the battery is located to change, thereby increasing the ambient temperature of the space where the battery is located.

[0069] The pressure in the space containing the batteries will vary due to changes in the ambient temperature. Therefore, the inflation flow rate can be determined based on the rate of gas generation from the runaway battery and the ambient temperature changes caused by the heat released by the runaway battery. The gas source is then controlled to deliver pressurized gas at the inflation flow rate to the internal cavity. This accurately simulates the operating conditions of the gas generated within the internal cavity 102 during a runaway battery, allowing for more accurate determination of the exhaust performance of the enclosure.

[0070] When a battery is out of control, the ambient temperature change caused by the heat released by the out-of-control battery and the volume of gas generated by the battery itself per unit time can be determined in advance through experiments. The rate at which a battery generates gas is the volume of gas generated by the out-of-control battery itself per unit time.

[0071] Furthermore, the method includes step one and step two.

[0072] Step 1: Obtain the temperature T1 in the internal cavity 102 and the volume V of the internal cavity 102 at a first time point before the current time point by a preset time length Δt, and obtain the temperature T2 in the internal cavity 102 at the current time point.

[0073] A temperature sensor (not shown) can be provided within the internal cavity 102 to obtain T1 and T2. V can be predetermined. T1 is obtained and recorded at a first time point in step 1. T2 is obtained and recorded at a current time point. The preset time duration Δt between the first time point and the current time point can be set as needed.

[0074] Step 2: Determine the gas flow rate F equivalent to the temperature rise based on T1, V, T2, and Δt. The gas flow rate is F and the volume of gas generated by the battery itself per unit time.

[0075] F can be determined based on T1, T2, Δt, and the volume V of the internal cavity 102. F is the value of the gas flow rate change caused by temperature change.

[0076] The control gas source delivers pressurized gas to the internal cavity 102. The pressurized gas flow rate is the sum of F and the rate at which the runaway battery generates gas. This allows for more accurate simulation of the gas conditions generated within the internal cavity 102 during a runaway battery, and thus allows for more accurate determination of the exhaust performance of the box.

[0077] Furthermore, F is determined by the formula F=V(T2-T1) / (T1+K) / Δt.

[0078] Where K is a constant. For example, K is 274.15. V is in liters. F is in liters / second. T1 and T2 are in degrees Celsius. Δt is in seconds.

[0079] F = V(T2-T1) / (T1+K) / Δt, derived from experimental data collected by the applicant over the years, accurately determines changes in gas flow caused by temperature variations. This allows for more accurate simulation of the gas conditions generated within the internal cavity 102 during battery runaway, further enabling more accurate determination of the exhaust performance of the battery.

[0080] The present application has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present application to the described embodiments. In addition, it will be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present application, all of which fall within the scope of protection claimed in the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0081] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "component" and the like appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing herein may refer to either a component being directly attached to another component or a component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise stated.

Claims

1. An exhaust simulation device, characterized in that: The exhaust simulation device is used to test the exhaust performance of a box body connected to an exhaust valve, wherein the box body forms an internal cavity and an exhaust port communicating with the internal cavity; the exhaust valve is movably connected to the box body to open or close the exhaust port; The exhaust simulation device comprises: a pipeline, wherein a first end of the pipeline is connected to the internal cavity; a gas source connected to the second end of the pipeline for delivering pressurized gas to the internal cavity through the pipeline; an exhaust pressure testing member, the exhaust pressure testing member being connected to the internal cavity and located outside the box; an intake pressure testing component, the intake pressure testing component being connected to the internal cavity and located inside the box; The inflation flow rate is determined based on the rate at which the out-of-control battery generates gas and the temperature change caused by the heat released by the out-of-control battery. Controlling the gas source to deliver the pressurized gas at a flow rate of the inflation flow rate to the internal cavity; Obtain the temperature T1 of the internal cavity and the volume V of the internal cavity at a first time point before the current time point, which is a preset time length Δt, and obtain the temperature T2 of the internal cavity at the current time point. Determine the gas flow rate F equivalent to the temperature rise according to the temperature T1, the volume V, the temperature T2, and the preset time Δt, where the inflation flow rate is the sum of the gas flow rate F and the speed at which the out-of-control battery generates gas; The gas flow rate F is determined by the formula F=V(T2-T1) / (T1+K) / Δt, Where K is a constant; The box body has an end wall, and the end wall has the exhaust port. The exhaust simulation device further includes a blocking member disposed in the box body and sealedly connected to an inner surface of the box body. The blocking member and the end wall are spaced apart to form the internal cavity.

2. The exhaust simulation device according to claim 1, characterized in that The exhaust pressure testing component is used to obtain the pressure of the gas in the internal cavity when the exhaust valve is opened, the opening time point of the exhaust valve, and the starting time point when the gas source starts to deliver the pressurized gas to the internal cavity.

3. The exhaust simulation device according to claim 1, characterized in that The exhaust simulation device further includes a pressure relief valve configured to communicate with the internal cavity.

4. The exhaust simulation device according to claim 3, characterized in that The pressure relief valve is connected to the intake pressure testing member.

5. The exhaust simulation device according to claim 1, characterized in that The exhaust simulation device further includes a flow valve, which is arranged on the pipeline.

6. The exhaust simulation device according to claim 1, characterized in that The exhaust simulation device further includes an inflation pressure test component connected to the pipeline.

7. The exhaust simulation device according to claim 1, characterized in that The exhaust simulation device further includes a plurality of separated sub-pipelines, one end of each sub-pipeline is connected to the gas source, and the other end of each sub-pipeline is connected to the second end of the pipeline.

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