Exhaust simulation device

Abstract

The invention discloses an exhaust simulation device. The exhaust simulation device comprises a pipeline, an air source, an exhaust pressure testing component and an air inlet pressure testing component; the first end of the pipeline is used for communicating to the inner cavity; the gas source is communicated to the second end of the pipeline and is used for conveying pressure gas to the inner cavity through the pipeline; the exhaust pressure testing component is communicated to the internal cavity and is positioned on the outer side of the box body; the air inlet pressure testing component is communicated with the inner cavity and is located on the inner side of the box body. Therefore, pressure gas can be conveyed to the internal cavity through the gas source, and when the pressure intensity of the gas in the internal cavity can push open the exhaust valve, the gas in the internal cavity can be exhausted through the exhaust port, so that the working condition that the gas is released in the internal cavity when the battery placed in the internal cavity is out of control is simulated; and then the exhaust performance of the internal cavity is detected.

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 transported in containers. During the transportation of batteries, the batteries may thermally run away and release gas. If the exhaust performance of the container body does not meet the requirements, the pressure of the gas in the container will increase and damage the container body.

[0003] However, currently there is no device that can simulate battery thermal runaway to release gas inside the box, so as to detect 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] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Specific Embodiments section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above technical problems, the present application provides an exhaust simulation device, which 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 connected to 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] An 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 a 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 a battery placed in the internal cavity is out of control is simulated, thereby detecting the exhaust performance of the internal cavity. 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 according to 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 in the internal cavity at a first time point before the current time point by a preset time length Δt and the volume V of the internal cavity are obtained, and the temperature T2 in the internal cavity at the current time point is obtained,

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

[0017] Optionally, 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 comprises a pressure relief valve, which is used to communicate with the internal cavity.

[0021] Optionally, a pressure relief valve is connected to the intake air 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 comprises an air-filled pressure test component, which is connected to the pipeline.

[0024] Optionally, the exhaust simulation device further includes a plurality of separated sub-pipelines, one end of the sub-pipeline is connected to the gas source, and the other end of the 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 comprises a blocking member, which is arranged in the box body and sealedly connected to the inner surface of the box body. The blocking member 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 by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present application and therefore should not be considered as limiting the scope of protection thereof. The present application is described and explained with additional characteristics and details through the accompanying drawings.

[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: Pipe

[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 is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

[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 only for the purpose of illustration and are not intended to be limiting.

[0041] Herein, ordinal numbers such as “first” and “second” cited in this application are merely identifications and do not have any other meanings, such as a specific order or the like.

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

[0043] The present application provides an exhaust simulation device. The exhaust simulation device can simulate the process of transporting batteries through the box 110 of a container. When the battery is out of control, gas is released in the box 110, and then the exhaust performance of the box 110 is detected when the battery is out of control during the process of transporting the battery.

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

[0045] The exhaust simulation device further includes an exhaust valve 120. The exhaust valve 120 is located outside the housing 110. The exhaust valve 120 is movably connected to the housing 110. In this way, 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. At this time, the gas in the internal cavity 102 can be discharged from the internal cavity 102 via 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 in the box. 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 opposite to the first end thereof. 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 the pressurized gas is output to the internal cavity 102, the pressure of the gas in the internal cavity 102 gradually increases. When the pressure of the gas in the internal cavity 102 is large enough, the gas in the internal cavity 102 can push the exhaust valve 120 to move away from the closed position and rotate toward the open position. At this time, the gas in 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 time period, the gas source 140 can be closed, thereby stopping the delivery of pressurized gas to the internal cavity 102. After stopping the delivery of pressurized gas to the internal cavity 102 for a second preset time period, the pressure in the internal cavity 102 is reduced to atmospheric pressure. At this time, the exhaust valve 120 can automatically move to the closed position. At this time, the portion of the box body 110 that constitutes the internal cavity 102 can be detected. If the portion of the box body 110 that constitutes the internal cavity 102 is not damaged, it is determined that the exhaust performance of the internal cavity 102 is qualified, otherwise it is considered that the exhaust performance of the internal cavity 102 is unqualified. The first preset time period and the second preset time period can be set as needed.

[0049] like Figure 1 As shown, the exhaust simulation device further includes an exhaust pressure test component 150. The exhaust pressure test component 150 may be a pressure gauge. The exhaust pressure test component 150 is connected to the internal cavity 102 so as to be able to detect the pressure of the gas in the internal cavity 102 at any time. In this way, the pressure of the gas in the internal cavity 102 can be obtained at any time.

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

[0051] like Figure 1 As shown, the exhaust simulation device further includes an intake pressure test member 151. The intake pressure test member 151 may be a pressure gauge. The intake pressure test member 151 is connected to the internal cavity 102. The intake pressure test member 151 is located inside the box 110 and on a side of the internal cavity 102 close to the pipeline 130. Thus, the staff can obtain the pressure of the gas in the internal cavity 102 both inside and outside the box 110.

[0052] It can be understood that in an embodiment not shown, the intake air pressure testing component can 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 can 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 detected; 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 is used to obtain the reading of the exhaust pressure test component 150 when the exhaust valve 120 is opened (that is, the pressure of the gas in the internal cavity 102), the opening time point of the exhaust valve 120, and the starting time point when the gas source 140 starts to deliver pressurized gas to the internal cavity 102. Therefore, the reading of the exhaust pressure test component 150 when the exhaust valve 120 is opened can be obtained as needed, the opening time point of the exhaust valve 120, and the starting time point when the gas source 140 starts to deliver pressurized gas to the internal cavity 102 can be obtained, and data basis can be provided for the development of subsequent products.

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

[0056] The pressure relief valve 160 is located inside the housing 110. The pressure relief valve 160 is connected to the intake pressure test member 151. Thus, when the pressure of the gas in the internal cavity 102 is detected to be greater than the maximum preset value by the intake pressure test member 151, the gas in the internal cavity 102 can be discharged in time through the pressure relief valve 160, thereby avoiding explosion. In addition, 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 detect the pressure of the gas delivered to the internal cavity 102 via the gas source 140, thereby providing data basis for the development of subsequent products.

[0058] Please continue to refer to Figure 1 The gas simulation device further includes a flow valve 170. The inflation pressure test component 152 and the flow valve 170 are both located in the box. The flow valve 170 is arranged in the pipeline 130. Along the flow direction of the gas delivered to the internal cavity 102 by the gas source 140, the flow valve 170 is located downstream of the inflation pressure test component 152. Thus, the flow rate of the gas delivered to the internal cavity 102 by the gas source 140 can be obtained at any time, thereby providing data basis for the development of subsequent products.

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

[0060] like Figure 1 As shown, the exhaust simulation device further includes a plurality of (e.g., two) sub-pipelines 180 separated from each other. One end of the sub-pipeline 180 is connected to the gas source 140. The other end of the sub-pipeline 180 is detachably connected to the second end (first pipeline 131) of the pipeline 130 through the flange plate 200. Thus, the flow rate of the gas delivered to the pipeline 130 can be increased.

[0061] The exhaust simulation device also includes a blocking member 190. The box 110 can be a box 110 of a container. The box 110 is a roughly rectangular parallelepiped structure. One end of the box 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 blocking member 190 is a rectangular plate. The blocking member 190 is arranged in the box 110 and is sealed to the inner surface of the box 110 (the inner surface of the top wall of the box 110, the inner surface of the two side walls and the upper surface of the floor). The blocking member 190 and the end wall 103 are arranged at intervals to form an internal cavity 102. Sealant is arranged around the blocking member 190, thereby circumferentially sealing the gap between the blocking member 190 and the inner surface of the box 110. The intake pressure test member 151 is arranged on the side of the blocking member 190 away from the end wall 103. Thus, an internal cavity 102 can be formed partially inside the container body to simulate the battery out-of-control condition in the internal cavity 102, and then the exhaust performance of the container body can be tested without simulating in the entire body 110, thereby reducing the test cost.

[0062] Alternatively, if Figure 1 As shown, the upper end of the exhaust valve 120 is pivotally connected to the end wall 103. The exhaust valve 120 in the closed position is tilted in the vertical direction. At this time, along the length direction of the box body 110, the upper end of the exhaust valve 120 is closer to the center of the box body 110 than the lower end. In this way, the exhaust valve 120 can be kept in the closed position under the action of its own weight.

[0063] It is understood that in an embodiment not shown, the exhaust simulation device further comprises an elastic member. The elastic member is 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, if Figure 1 As shown, the exhaust port 101 is located at the upper end of the end wall 103. Thus, exhaust is convenient.

[0065] Optionally, 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 speed at which the out-of-control battery produces 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 a change in the ambient temperature of a space where the battery is located, thereby increasing the ambient temperature of the space where the battery is located.

[0069] The pressure of the space where the battery is located will change due to the change of the ambient temperature of the space where the battery is located. Therefore, the inflation flow rate can be determined according to the speed at which the out-of-control battery generates gas and the change of ambient temperature caused by the heat released by the out-of-control battery, and the gas source can be controlled to deliver pressure gas with a flow rate of the inflation flow rate to the internal cavity. The working condition of the gas generated in the internal cavity 102 when the battery is out of control can be accurately simulated, and the exhaust performance of the box can be determined more accurately.

[0070] Among them, when the battery is out of control, the change in ambient temperature 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 predetermined through experiments. The speed at which the out-of-control 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) may be provided in the internal cavity 102 to obtain T1 and T2. V may be predetermined. T1 is obtained and recorded at a first time point through step 1. T2 is obtained and recorded at a current time point. The preset time length Δt between the first time point and the current time point may be set as required.

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

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

[0076] The control gas source delivers pressurized gas to the internal cavity 102. The inflation flow rate of the pressurized gas is the sum of F and the speed at which the out-of-control battery generates gas. In this way, the working condition of the gas generated in the internal cavity 102 when the battery is out of control can be more accurately simulated, and the exhaust performance of the box can be more accurately determined.

[0077] Further, 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 is obtained by the applicant through experimental data summary in the long-term work process, and can accurately determine the change in gas flow caused by temperature change. In this way, the working conditions of the gas generated in the internal cavity 102 when the battery is out of control can be more accurately simulated, and the exhaust performance of the box can be more accurately determined.

[0080] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed by the present application. The scope of protection of the present application is defined by the attached claims and their equivalents.

[0081] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally 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 in this article may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing in this article may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. 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 specified.

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, a first end of the pipeline being 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 being located outside the box; An intake pressure testing component is connected to the internal cavity and is located inside the box.

2. The exhaust simulation device according to claim 1, characterized in that The inflation flow rate is determined based on the speed at which the out-of-control battery produces gas and the temperature change caused by the heat released by the out-of-control battery. The gas source is controlled to deliver the pressurized gas with a flow rate equal to the inflation flow rate to the internal cavity.

3. The exhaust simulation device according to claim 2, characterized in that: Acquire the temperature T1 of the internal cavity at a first time point before the current time point by a preset time length Δt, and the volume V of the internal cavity, acquire the temperature T2 of the internal cavity at the current time point, The gas flow F equivalent to the temperature rise is determined according to the T1, the V, the T2 and the Δt, and the inflation flow is the sum of the F and the speed at which the out-of-control battery generates gas.

4. The exhaust simulation device according to claim 3, characterized in that: The F is determined by the formula F=V(T2-T1) / (T1+K) / Δt, Where K is a constant.

5. 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.

6. 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.

7. The exhaust simulation device according to claim 6, characterized in that: The pressure relief valve is connected to the intake air pressure testing member.

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

9. The exhaust simulation device according to claim 1, characterized in that: The exhaust simulation device further includes an air-filling pressure testing component connected to the pipeline.

10. 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.

11. The exhaust simulation device according to claim 1, characterized in that: The box body has an end wall, and the end wall has the exhaust port. The exhaust simulation device further includes a blocking member, which is 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.

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