A test device for an energy storage device

Abstract

This application discloses a testing apparatus for an energy storage device. The testing apparatus includes: a housing with an upward-facing opening; a top cover covering the opening and forming a receiving space with the housing, the receiving space for accommodating the energy storage device; and a salt spray device including multiple salt spray nozzles disposed on the top cover and facing the receiving space, the multiple salt spray nozzles being uniformly arranged along a first direction perpendicular to the thickness direction of the top cover. The testing apparatus provided by this application can improve the accuracy of test results.

Description

Technical Field

[0001] This application relates to the field of materials testing, and more specifically, to a testing apparatus for an energy storage device. Background Technology

[0002] Against the backdrop of strong global support for the development of new energy technologies, various energy storage technologies have been widely applied. Energy storage devices, with their advantages of high energy density and long service life, are seeing their application scenarios continuously expand. However, these devices are often placed in various extreme environments and are susceptible to corrosion from atmospheric salt spray. Therefore, targeted testing is urgently needed to optimize their corrosion resistance. Existing salt spray testing devices simulate environments that deviate significantly from real natural environments, leading to distorted test results and making it difficult to accurately reflect the actual corrosion resistance level of energy storage devices.

[0003] Therefore, how to accurately simulate the real natural environment to conduct corrosion resistance tests on energy storage devices and improve the accuracy of test results has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] This application provides a testing apparatus for an energy storage device, which can improve the accuracy of test results.

[0005] In a first aspect, this application provides a testing apparatus for an energy storage device, comprising: a housing having an upward opening; a top cover covering the opening and forming a receiving space with the housing for accommodating the energy storage device; and a salt spray device including a plurality of salt spray nozzles disposed on the top cover and facing the receiving space, the plurality of salt spray nozzles being uniformly arranged along a first direction perpendicular to the thickness direction of the top cover.

[0006] In the technical solution of this application embodiment, by placing the salt spray nozzles on the top cover, the salt sprayed by the nozzles can naturally settle from top to bottom. Compared with placing the salt spray nozzles on the sides, this reduces the directional impact of salt spray on the energy storage device, reduces blind spots, and lowers the risk of condensation on the nozzles or their supports. This is especially beneficial for large energy storage devices, reducing the risk of insufficient pressure during side spraying leading to ineffective spraying onto the device, and the risk of increased pressure causing increased equipment wear. Furthermore, by setting multiple salt spray nozzles evenly distributed on the top cover, the energy storage device can be better covered, ensuring uniform spraying of salt spray on its surface, thus better simulating the real atmospheric environment and improving test accuracy.

[0007] In some embodiments of the first aspect, a plurality of salt spray nozzles are also uniformly arranged along a second direction, which is perpendicular to the first direction and the thickness direction of the top cover.

[0008] In the technical solution of this application embodiment, multiple salt spray nozzles are evenly arranged along the first direction and the second direction, so that the salt spray nozzles are more evenly distributed on the top cover, forming a top spray atomization network with full coverage and uniform distribution, improving the uniformity of droplet deposition, thereby better simulating the real atmospheric environment and improving the accuracy of the test.

[0009] In some embodiments of the first aspect, in the first direction, there is a first spacing between two adjacent salt spray nozzles, and in the second direction, there is a second spacing between two adjacent salt spray nozzles. Both the first spacing and the second spacing are greater than the spray radius of the salt spray nozzle and smaller than the spray diameter of the salt spray nozzle.

[0010] In the technical solution of this application embodiment, the spacing between two adjacent salt spray nozzles is set within the range between the spray radius and spray diameter of a single salt spray nozzle. On the one hand, this allows the upper surface of the energy storage device to be effectively covered by salt spray. On the other hand, it minimizes the convergence of salt spray from adjacent nozzles, reduces the risk of large droplets forming due to salt spray convergence, and improves the uniformity of droplet size distribution. This makes the corrosion environment closer to real natural atmospheric conditions and improves the reliability of the test.

[0011] In some embodiments of the first aspect, the first spacing is equal to the second spacing.

[0012] In the technical solution of this application embodiment, the first spacing and the second spacing are equal, which can make the distribution of multiple salt spray nozzles more uniform, thereby further improving the uniformity of droplet size, reducing the concentration gradient in each region, and improving the test accuracy.

[0013] In some embodiments of the first aspect, a plurality of salt spray nozzles are disposed toward the energy storage device, and the projections of the plurality of salt spray nozzles are uniformly distributed within the projection area of ​​the energy storage device on a plane perpendicular to the height direction of the energy storage device.

[0014] In the technical solution of this application embodiment, the salt spray nozzle is oriented towards and directly facing the energy storage device, which enables the salt spray to fall more effectively on the energy storage device and improves the accuracy of the test.

[0015] In some embodiments of the first aspect, the salt spray nozzle is embedded inside the top cover, and the outlet end of the salt spray nozzle protrudes from the inner sidewall of the top cover.

[0016] In the technical solution of this application embodiment, only the outlet end of the salt spray nozzle is exposed, thereby reducing the exposed area of ​​the salt spray nozzle inside the device, reducing the adhesion surface of the salt spray nozzle that can condense, and further reducing the risk of condensation.

[0017] In some embodiments of the first aspect, the top cover has a first end and a second end disposed opposite to each other along the first direction, the distance between the first end and the bottom wall of the housing being greater than the distance between the second end and the bottom wall of the housing.

[0018] In the technical solution of this application embodiment, the top cover is tilted so that the salt solution condensed on the top cover can flow quickly along the tilted surface to the side wall of the tank, and then along the side wall to the bottom wall of the tank, thereby reducing the risk of condensation dripping directly onto the surface of the energy storage device, reducing the impact of condensation on the test results, and improving the test accuracy.

[0019] In some embodiments of the first aspect, the top cover includes a first top cover and a second top cover, a first end of the first top cover and a first end of the second top cover being close to and connected to each other, and a second end of the first top cover and a second end of the second top cover being far from each other and respectively connected to the housing.

[0020] In the technical solution of this application embodiment, by setting an inclined first top cover and a second top cover, the salt liquid condensed on the top can flow along the inclined surfaces on both sides, shortening the distance the condensed salt liquid flows on the top, allowing the salt liquid to flow quickly to the side wall of the tank, further reducing the risk of condensation dripping directly from the top cover onto the surface of the energy storage device, reducing the impact of condensation on the test results, and improving the test accuracy.

[0021] In some embodiments of the first aspect, the angle between the surface of the first top cover near the receiving space and the surface of the second top cover near the receiving space is less than 180°.

[0022] In the technical solution of this application embodiment, the first top cover and the second top cover are inclined to each other, which allows the salt solution condensed on the top cover to flow along the inclined surfaces of the first top cover and the second top cover to the side wall, further reducing the risk of condensation dripping directly from the top cover onto the surface of the energy storage device, reducing the impact of condensation on the test results, and improving the test accuracy.

[0023] In some embodiments of the first aspect, the projected area of ​​the first top cover on the bottom wall of the housing is equal to the projected area of ​​the second top cover on the bottom wall of the housing, and the number of salt spray nozzles provided on the first top cover is the same as the number of salt spray nozzles provided on the second top cover.

[0024] In the technical solution of this application embodiment, the first top cover and the second top cover are symmetrically arranged. This ensures that the salt spray sprayed on the energy storage device is evenly distributed. At the same time, it can reduce the risk of the salt liquid condensed on the top dripping directly onto the surface of the energy storage device and improve the accuracy of the salt spray test.

[0025] In some embodiments of the first aspect, a flow channel is provided on the bottom wall of the housing near the second end, the flow channel extending along a second direction perpendicular to the first direction and the thickness direction of the top cover.

[0026] In the technical solution of this application embodiment, by setting a guide channel, the collected salt solution can flow in a specific direction, and the salt solution can be further collected for secondary use, saving testing costs.

[0027] In some embodiments of the first aspect, the salt spray device further includes a storage tank disposed outside the housing for storing salt solution.

[0028] In the technical solution of this application embodiment, the liquid storage tank is set outside the box body, thereby reducing the space occupied inside the box body and making effective use of the space inside the test device, so as to accommodate a large energy storage device. In addition, it can also reduce the internal cold surface area, thereby reducing the risk of condensation adhering and dripping, and improving the reliability of the test.

[0029] In some embodiments of the first aspect, the salt spray device further includes a connecting pipe, which is at least partially disposed inside the top cover and communicates with the salt spray nozzle, with one end of the connecting pipe away from the salt spray nozzle communicating with the storage tank.

[0030] In the technical solution of this application embodiment, the connecting pipe can be set inside the top cover or outside the box, reducing the space occupied by the connecting pipe. At the same time, it reduces the exposed area of ​​the connecting pipe inside the box, reduces the risk of condensate adhesion and dripping, and improves the convenience of maintaining the salt spray device. Attached Figure Description

[0031] Figure 1 A schematic diagram of the external shape of an energy storage device according to an embodiment of this application is shown;

[0032] Figure 2 A schematic diagram of the structure of a test apparatus according to an embodiment of this application is shown;

[0033] Figure 3 A bottom view of a test apparatus according to an embodiment of this application is shown;

[0034] Figure 4 A front view of a test apparatus according to an embodiment of this application is shown;

[0035] Figure 5 A schematic diagram of the structure of a test apparatus according to another embodiment of this application is shown;

[0036] Figure 6 A schematic diagram of the structure of a test apparatus according to another embodiment of this application is shown;

[0037] Figure 7 A bottom view of a test apparatus according to another embodiment of this application is shown;

[0038] Figure 8 A schematic diagram of the structure of a test apparatus according to another embodiment of this application is shown;

[0039] Figure 9 A front view of a test apparatus according to an embodiment of this application is shown.

[0040] The accompanying drawings are not drawn to scale.

[0041] The labels for each figure are as follows:

[0042] Energy storage device 100; testing device 200; housing 210; bottom wall 2101; guide channel 211; top cover 220; first end 221; second end 222; first top cover 220a; second top cover 220b; first end 221a of the first top cover; second end 222a of the first top cover; first end 221b of the second top cover; second end 222b of the second top cover; salt spray device 230; salt spray nozzle 231; outlet end 231a; liquid storage tank 232; connecting pipeline 233. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0045] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0049] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0050] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0051] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0052] This application provides an energy storage system, including one or more energy storage devices and a power converter system (PCS), which is connected between a power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power converter system. As an example, the power generation device may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of power generation device is not limited in this application.

[0053] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device. Alternatively, the energy storage device can directly increase its capacity by connecting multiple battery devices in parallel.

[0054] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0055] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0056] Against the backdrop of strong global support for the development of new energy technologies, various energy storage technologies have been widely applied. Energy storage devices, with their advantages of high energy density and long service life, are seeing their application scenarios continuously expand. However, these devices are often placed in various extreme environments and are susceptible to corrosion from atmospheric salt spray. Therefore, targeted testing is urgently needed to optimize their corrosion resistance. Existing salt spray testing devices have significant discrepancies between the simulated environment and the real natural environment, leading to distorted test results that fail to accurately reflect the actual corrosion resistance level of energy storage devices. Therefore, how to accurately simulate the real natural environment to conduct corrosion resistance tests on energy storage devices and improve the accuracy of test results has become a pressing technical problem to be solved in this field.

[0057] This application provides a testing apparatus for an energy storage device, which can solve the above-mentioned problems. The testing apparatus of this application can be applied to an energy storage device, including a housing, a top cover, and a salt spray device; wherein, the housing has an upward-facing opening; the top cover is disposed on the opening and forms a receiving space with the housing, the receiving space being used to accommodate the energy storage device; the salt spray device includes a plurality of salt spray nozzles, the plurality of salt spray nozzles being disposed on the top cover and facing the receiving space, the plurality of salt spray nozzles being uniformly arranged along a first direction, the first direction being perpendicular to the thickness direction of the top cover.

[0058] In this embodiment, by placing the salt spray nozzles on the top cover, the salt spray can naturally settle from top to bottom. Compared to placing the nozzles on the sides, this reduces the directional impact of salt spray on the energy storage device, minimizes blind spots, and lowers the risk of condensation on the nozzles or their supports. This is especially beneficial for large energy storage devices, reducing the risk of insufficient pressure during side spraying leading to ineffective spraying and the increased risk of equipment wear from increased pressure, thus ensuring device performance. Furthermore, the placement of multiple salt spray nozzles evenly distributed on the top cover provides better coverage of the energy storage device, ensuring uniform spraying and better simulating the real atmospheric environment, thereby improving test accuracy.

[0059] The technical solutions described in this application are applicable to energy storage devices of various types and sizes. For example, the energy storage device may be an energy storage container or an energy storage cabinet. The batteries housed in the energy storage container include, but are not limited to, lithium batteries, such as lithium iron phosphate batteries, lithium manganese oxide batteries, or lithium cobalt oxide batteries, etc.

[0060] In some embodiments, the energy storage container can be a large container. For example, the width of the energy storage container can be 3m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, etc., or even more than 10m. The embodiments of this application are not limited to this.

[0061] Figure 1 The diagram shows the external shape of an energy storage device provided in this application when it is an energy storage container.

[0062] like Figure 1 As shown, the energy storage device 100 can be a regular rectangular parallelepiped structure, facilitating its fixed placement and transportation. The interior of the energy storage device 100 is a hollow structure, which can include a battery compartment for mounting battery racks. In addition to the battery compartment, the interior of the energy storage device 100 can be divided into multiple functional compartments according to actual needs. Each functional compartment contains other functional equipment components for battery management or auxiliary operation, such as current collectors, thermal management components, etc.

[0063] Figure 2 A schematic diagram of the structure of a testing device provided in an embodiment of this application is shown. Figure 3 As shown Figure 2 The test apparatus shown is viewed from below along direction Z.

[0064] like Figure 2 and Figure 3 As shown, the testing device 200 of this application embodiment may include: a housing 210, a top cover 220, and a salt spray device 230; wherein, the housing 210 has an upward opening; the top cover 220 covers the opening and forms a receiving space with the housing 210, the receiving space being used to receive an energy storage device; the salt spray device 230 includes a plurality of salt spray nozzles 231, the plurality of salt spray nozzles 231 being disposed on the top cover 220 and facing the receiving space, the plurality of salt spray nozzles 231 being uniformly disposed along a first direction, the first direction being perpendicular to the thickness direction of the top cover 220.

[0065] It should be understood that the testing device 200 can be applied to energy storage devices, as well as to vehicles, instruments and equipment, etc., and the embodiments of this application are not limited thereto.

[0066] For ease of description, this application primarily uses a near-rectangular-prism testing device 200 as an example. Furthermore, based on this rectangular-prism testing device 200, this application defines three reference directions. The length direction of the testing device 200 is direction X, the width direction is direction Y, and the height direction is direction Z. The width, length, and height directions of the testing device 200 are perpendicular to each other, and the width dimension of the testing device 200 is smaller than its length dimension.

[0067] The testing apparatus 200 of this application embodiment may include a housing 210 and a top cover 220. The housing 210 may have one or more openings. For example, the housing 210 may have an upward-facing opening, and the top cover 220 may be placed over this opening. The housing 210 may also have a side opening, through which the energy storage device 100 can enter the interior of the housing 210 to perform salt spray testing on the energy storage device 100.

[0068] In some embodiments, the housing 210 has an upward-facing opening, and a top cover 220 is disposed over the opening, forming a receiving space with the housing 210. It should be understood that the receiving space can be used to house the energy storage device 100 for salt spray testing.

[0069] In some embodiments, the testing device 200 may further include a door, which may be located at the side opening of the housing 210. When the testing device 200 performs salt spray testing on the energy storage device 100, the door may be used to close the opening. It should be understood that the configuration of the housing 210 is not limited thereto.

[0070] The testing apparatus 200 may also include a salt spray device 230, which may include a plurality of salt spray nozzles 231. The salt spray nozzles 231 can be used to spray salt spray to simulate natural atmospheric conditions.

[0071] Multiple salt spray nozzles 231 can be installed entirely on the housing 210, entirely on the top cover 220, or partially on the housing 210 and partially on the top cover 220.

[0072] In some embodiments, multiple salt spray nozzles 231 may be disposed on the top cover 220 and facing the receiving space. That is, multiple salt spray nozzles 231 are disposed on the top of the entire testing device 200, and the outlet ends of the multiple salt spray nozzles 231 face the inside of the housing 210, so that the salt spray emitted by the salt spray nozzles 231 naturally sinks from the top to the surface of the energy storage device 100, thereby keeping the testing conditions of the entire working area highly consistent with the natural atmospheric environment and improving the accuracy of the test.

[0073] It should be understood that the salt spray nozzle 231 can be disposed on the surface of the inner side wall of the top cover 220, or it can be embedded in the top cover 220. The embodiments of this application are not limited thereto.

[0074] Multiple salt spray nozzles 231 can be evenly distributed on the top cover 220, so that the sprayed salt spray can cover more comprehensively, reduce the phenomenon of insufficient coverage in the corner areas of the energy storage device, and improve the accuracy of the test.

[0075] Specifically, multiple salt spray nozzles 231 can be uniformly arranged along a first direction, which is perpendicular to the thickness direction of the top cover 220.

[0076] In some embodiments, the plurality of salt spray nozzles 231 may also be uniformly arranged along a first direction and a second direction, wherein the first direction and the second direction are perpendicular to each other and both are perpendicular to the thickness direction of the top cover 220.

[0077] It should be understood that the first direction and the second direction can be two mutually perpendicular directions that are parallel to the large surface of the top cover 220. For example, the first direction and the second direction can be respectively as follows: Figure 2 The directions Y and X are shown.

[0078] Multiple salt spray nozzles 231 can be evenly arranged along a first direction and a second direction, respectively. That is, multiple salt spray nozzles 231 are evenly spaced along the first direction and also evenly spaced along the second direction. In the first direction, the distance between any two adjacent salt spray nozzles 231 is equal, and in the second direction, the distance between any two adjacent salt spray nozzles 231 is equal.

[0079] Salt spray nozzles 231 are installed at different positions on the top cover 220 to reduce the differences in salt spray concentration and salt spray deposition at different locations within the device, thereby improving the consistency of the corrosive environment of various parts of the energy storage device and enhancing the reliability of the test results.

[0080] In the technical solution of this application embodiment, by placing the salt spray nozzle 231 on the top cover 220, the salt sprayed by the nozzle 231 can naturally settle from top to bottom. Compared with placing the salt spray nozzle 231 on the side, this reduces the directional impact of salt spray on the energy storage device, reduces blind spots, and lowers the risk of condensation on the nozzle or its support. Especially for large energy storage devices, this reduces the risk of insufficient pressure causing the spray to not effectively reach the energy storage device, while increasing pressure can easily lead to increased equipment wear, thus ensuring device performance. Furthermore, by setting multiple salt spray nozzles 231 at even intervals on the top cover 220, a comprehensive and evenly distributed top spray atomization network is formed, improving the uniformity of droplet settling, thereby better simulating the real atmospheric environment and improving test accuracy.

[0081] In some embodiments, a plurality of salt spray nozzles 231 are arranged toward the energy storage device, and the projections of the plurality of salt spray nozzles 231 are evenly distributed in the projection area of ​​the energy storage device on a plane perpendicular to the height direction of the energy storage device.

[0082] It should be understood that uniform distribution can refer to relatively uniform setting, where the distance between two adjacent salt spray nozzles is within a certain error range (e.g., less than 50cm).

[0083] By orienting the salt spray nozzle 231 towards and directly facing the energy storage device, the salt spray can fall more effectively onto the energy storage device, thus improving the accuracy of the test.

[0084] In some embodiments, in a first direction, there is a first spacing between two adjacent salt spray nozzles 231, and in a second direction, there is a second spacing between two adjacent salt spray nozzles 231. Both the first spacing and the second spacing are greater than the spray radius of the salt spray nozzles 231 and smaller than the spray diameter of the salt spray nozzles 231. That is, the spray radius of the salt spray nozzles 231 is greater than half of the first spacing and half of the second spacing, respectively, and smaller than the first spacing and the second spacing, respectively.

[0085] In some embodiments, such as Figure 3 As shown, let the first spacing be a, the second spacing be b, and the spray radius of the salt spray nozzle 231 be r. Then the three satisfy a. 2 +b 2 ≥r 2 .

[0086] Setting the spacing between two adjacent salt spray nozzles 231 within the range of the spray radius and spray diameter of a single salt spray nozzle 231 ensures that the upper surface of the energy storage device is effectively covered by salt spray. On the other hand, it minimizes the convergence of salt spray from adjacent nozzles 231, reducing the risk of large droplets forming due to salt spray convergence and improving the uniformity of droplet size distribution. This makes the corrosion environment closer to real natural atmospheric conditions and improves the reliability of the test.

[0087] In some embodiments, the first spacing and the second spacing are equal, which allows for a more uniform distribution of the multiple salt spray nozzles 231, thereby further improving the uniformity of droplet size, reducing the concentration gradient in each region, and improving test accuracy. Furthermore, the first spacing and the second spacing can satisfy the following relationship with the spray radius r of the salt spray nozzle 231: .

[0088] In some embodiments, the salt spray nozzle 231 is at least partially embedded inside the top cover 220. For example, as Figure 4 As shown, the salt spray nozzle 231 can be embedded inside the top cover 220, and the outlet end 231a of the salt spray nozzle 231 protrudes from the inner wall of the top cover 220.

[0089] This results in only the outlet end 231a of the salt spray nozzle 231 being exposed, thereby reducing the exposed area of ​​the salt spray nozzle 231 inside the device, reducing the condensable adhesion surface of the salt spray nozzle 231, and further reducing the risk of condensation.

[0090] It should be understood that the salt spray device 230 may also include a liquid storage tank and connecting pipes, etc. The liquid storage tank is connected to the salt spray nozzle 231 through the connecting pipes, thereby delivering salt spray to the salt spray nozzle 231. The embodiments of this application are not limited thereto.

[0091] In some embodiments, the top cover 220 may be configured to have a certain tilt angle.

[0092] Figure 5 A schematic diagram of another testing device provided in an embodiment of this application is shown, as follows: Figure 5As shown, the top cover 220 may have a first end 221 and a second end 222 disposed opposite to each other along a first direction, wherein the distance between the first end 221 and the bottom wall 2101 of the housing 210 is greater than the distance between the second end 222 and the bottom wall 2101 of the housing 210.

[0093] It should be understood that the first direction can be the length direction of the top cover 220 or the width direction of the top cover 220, and the embodiments of this application are not limited thereto.

[0094] The distance between the first end 221 and the bottom wall 2101 of the box 210 is greater than the distance between the second end 222 and the bottom wall 2101 of the box 210. That is, the first end 221 is higher than the second end 222, which makes the top cover 220 tilt as a whole.

[0095] In this embodiment, the top cover 220 is tilted so that the salt solution condensed on the top cover 220 can flow quickly along the tilted surface to the side wall of the tank 210, and then along the side wall to the bottom wall 2101 of the tank 210. This reduces the risk of condensation dripping directly onto the surface of the energy storage device, reduces the impact of condensation on the test results, and improves the accuracy of the test.

[0096] It should be understood that there may be one or more top covers 220. For example, the test apparatus 200 may include two tilted top covers 220. As another example, the test apparatus 200 may also include four tilted top covers. The embodiments of this application are not limited to this number of top covers 220.

[0097] Figure 6 A schematic diagram of another testing apparatus provided in an embodiment of this application is shown. Figure 7 As shown Figure 6 The top view of the test device shown is taken along direction Z.

[0098] like Figure 6 and Figure 7 As shown, in some embodiments, the top cover 220 may include a first top cover 220a and a second top cover 220b. The first end 221a of the first top cover and the first end 221b of the second top cover are close to each other and connected to each other. The second end 222a of the first top cover and the second end 222b of the second top cover are far apart from each other and are respectively connected to the housing 210.

[0099] It should be understood that the distance between the first end 221a of the first top cover and the bottom wall 2101 of the box 210 is greater than the distance between the second end 222a of the first top cover and the bottom wall 2101 of the box 210; the distance between the first end 221b of the second top cover and the bottom wall 2101 of the box 210 is greater than the distance between the second end 222b of the second top cover and the bottom wall 2101 of the box 210.

[0100] The first end 221a of the first top cover can be connected to the first end 221b of the second top cover, so that they together cover the upward-facing opening of the box body 210.

[0101] That is, by setting an inclined first top cover 220a and a second top cover 220b, the salt solution condensed on the top can flow along the inclined surfaces on both sides, shortening the distance the condensed salt solution flows on the top, and allowing the salt solution to flow quickly to the side wall of the tank 210. This further reduces the risk of condensation dripping directly from the top cover onto the surface of the energy storage device, reduces the impact of condensation on the test results, and improves the accuracy of the test.

[0102] In some embodiments, the angle between the surface of the first top cover 220a near the receiving space and the surface of the second top cover 220b near the receiving space is less than 180°.

[0103] In this way, the first top cover 220a and the second top cover 220b are inclined to each other, and the salt solution condensed on the top cover can flow to the side wall along the inclined surfaces of the first top cover 220a and the second top cover 220b respectively. This further reduces the risk of condensation dripping directly from the top cover onto the surface of the energy storage device, reduces the impact of condensation on the test results, and improves the accuracy of the test.

[0104] In some embodiments, the angle between the surface of the first top cover 220a near the receiving space and the surface of the second top cover 220b near the receiving space can range from [30°, 150°], and more specifically, from [90°, 120°]. This ensures that both the first top cover 220a and the second top cover 220b have sufficient inclination, allowing condensation to flow quickly to the sidewalls and reducing the risk of condensation dripping directly from the top cover 220 onto the energy storage device.

[0105] In some embodiments, the angle between the surface of the first top cover 220a near the receiving space and the surface of the second top cover 220b near the receiving space can be any of the following values ​​or between any of the following values: 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°.

[0106] In some embodiments, the projected area of ​​the first top cover 220a on the bottom wall 2101 of the housing 210 can be equal to the projected area of ​​the second top cover 220b on the bottom wall 2101 of the housing 210. That is, the first top cover 220a and the second top cover 220b are symmetrically arranged.

[0107] It should be understood that multiple evenly distributed salt spray nozzles 231 can be respectively provided on the first top cover 220a and the second top cover 220b, so that the sprayed salt spray can cover more comprehensively.

[0108] In some embodiments, the projected area of ​​the first top cover 220a on the bottom wall 2101 of the housing 210 is equal to the projected area of ​​the second top cover 220b on the bottom wall 2101 of the housing 210, and the number of salt spray nozzles 231 on the first top cover 220a can be the same as the number of salt spray nozzles 231 on the second top cover 220b.

[0109] In other words, the first top cover 220a and the second top cover 220b are set symmetrically. This ensures that the salt spray sprayed on the energy storage device is evenly distributed. At the same time, it also reduces the risk of salt liquid condensed on the top dripping directly onto the surface of the energy storage device, thus improving the accuracy of the salt spray test.

[0110] Figure 8 A schematic diagram of another testing apparatus provided in an embodiment of this application is shown. Figure 8 As shown, in some embodiments, a flow guide groove 211 is provided in the area of ​​the bottom wall 2101 of the housing 210 near the second end 222, and the flow guide groove 211 extends along the second direction.

[0111] It should be understood that the flow guide 211 is located on the side wall of the bottom wall 2101 near the housing 210. The extension direction of the flow guide 211 is consistent with the extension direction of the second end 222. The second direction can, for example, refer to... Figure 8 The direction Y is shown.

[0112] In some embodiments, the length of the guide channel 211 along the second direction may be greater than or equal to the length of the second end 222 along the second direction, so that the salt solution condensed at any position on the inner surface of the top cover 220 can flow into the guide channel 211 sequentially through the inner surface of the top cover and the inner surface of the side wall of the box 210.

[0113] In this embodiment of the application, by setting the guide channel 211, the collected salt solution can flow in a specific direction, and the salt solution can be further collected for secondary use, saving testing costs.

[0114] In some embodiments, in the second direction, the depth of the guide channel 211 along the thickness direction of the bottom wall 2101 gradually increases from the end away from the door to the end closer to the door. Thus, a height difference is formed in the brine at any position in the guide channel 211, allowing the brine to flow directionally into the position closer to the door for uniform collection due to gravity.

[0115] Figure 9 The diagram shows a front view of the testing apparatus provided in an embodiment of this application along the Y direction. In some embodiments, the salt spray device 230 may further include a reservoir 232, which can be used to store salt solution for supplying salt solution to the salt spray nozzle 231.

[0116] It should be understood that the liquid storage tank 232 can be disposed inside or outside the testing device 200. In some embodiments, the liquid storage tank 232 can be disposed outside the testing device 200, for example, outside the housing 210, thereby reducing the space occupied inside the device and allowing the space inside the testing device 200 to be effectively utilized to accommodate a large energy storage device. Furthermore, it reduces the internal cold surface area, thereby reducing the risk of condensation adhesion and dripping, and improving the reliability of the test.

[0117] In some embodiments, continue to refer to Figure 9 The salt spray device 230 may also include a connecting pipe 233, which can connect the salt spray nozzle 231 and the storage tank 232, thereby transporting the salt solution in the storage tank 232 to the salt spray nozzle 231.

[0118] It should be understood that one end of the connecting pipe 233 can extend into the interior of the top cover 220 from the side of the top cover 220 away from the receiving space, and communicate with the salt spray nozzle 231 inside the top cover 220. The other end of the connecting pipe 233 is connected to the liquid storage tank 232. That is, the connecting pipe 233 can be at least partially located inside the top cover 220. This allows the connecting pipe 233 to be located inside the top cover 220 or outside the housing 210, reducing the internal space occupied by the connecting pipe 233. At the same time, it reduces the exposed area of ​​the connecting pipe 233 inside the housing 210, reduces the risk of condensate adhesion and dripping, and improves the convenience of maintaining the salt spray device 230.

[0119] In some embodiments, the connecting pipe 233 may include a first connecting pipe and a plurality of second connecting pipes. The plurality of second connecting pipes are respectively connected to a plurality of salt spray nozzles 231. The ends of the plurality of connecting pipes away from the salt spray nozzles 231 are all connected to the first connecting pipe. The ends of the first connecting pipes away from the plurality of second connecting pipes are connected to the storage tank 232. Thus, the salt solution in the storage tank 232 passes through the first connecting pipe and the second connecting pipes and the salt spray nozzles 231 in sequence. The salt spray nozzles 231 can atomize the salt solution to form salt mist for testing the energy storage device.

[0120] It should be understood that multiple second connecting pipes can be located on the side of the top cover 220 away from the receiving space, or they can be embedded inside the top cover 220. The embodiments of this application are not limited thereto.

[0121] According to some embodiments of this application, see Figures 1 to 9This application provides a testing device 200, including: a housing 210, a top cover 220, and a salt spray device 230; wherein, the housing 210 has an upward opening; the top cover 220 covers the opening and forms an accommodating space with the housing 210; the salt spray device 230 includes a plurality of salt spray nozzles 231, which are disposed on the top cover 220 and face the accommodating space, and the plurality of salt spray nozzles 231 are evenly spaced along a first direction and a second direction, the first direction and the second direction being perpendicular to each other and all perpendicular to the thickness direction of the top cover 220.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A testing device for an energy storage device, characterized in that, include: The box has an upward-facing opening; A top cover is provided on the opening and forms an accommodating space with the housing, the accommodating space being used to accommodate the energy storage device; The top cover has a first end and a second end disposed opposite to each other along a first direction, the distance between the first end and the bottom wall of the box body is greater than the distance between the second end and the bottom wall of the box body, and the first direction is perpendicular to the thickness direction of the top cover; A salt spray device, comprising a plurality of salt spray nozzles disposed on the top cover and facing the receiving space, wherein the plurality of salt spray nozzles are uniformly arranged along the first direction.

2. The testing apparatus according to claim 1, characterized in that, The plurality of salt spray nozzles are also uniformly arranged along a second direction, which is perpendicular to the first direction and the thickness direction of the top cover.

3. The testing apparatus according to claim 2, characterized in that, In the first direction, there is a first gap between two adjacent salt spray nozzles, and in the second direction, there is a second gap between two adjacent salt spray nozzles. Both the first gap and the second gap are greater than the spray radius of the salt spray nozzle and smaller than the spray diameter of the salt spray nozzle.

4. The testing apparatus according to claim 3, characterized in that, The first spacing is equal to the second spacing.

5. The testing apparatus according to claim 1, characterized in that, Multiple salt spray nozzles are arranged toward the energy storage device, and the projections of the multiple salt spray nozzles are evenly distributed within the projection area of ​​the energy storage device on a plane perpendicular to the height direction of the energy storage device.

6. The testing apparatus according to claim 1, characterized in that, The salt spray nozzle is embedded inside the top cover, and the outlet end of the salt spray nozzle protrudes from the inner wall of the top cover.

7. The testing apparatus according to claim 1, characterized in that, The top cover includes a first top cover and a second top cover. The first end of the first top cover and the first end of the second top cover are close to each other and connected to each other. The second end of the first top cover and the second end of the second top cover are far apart from each other and are respectively connected to the box body.

8. The testing apparatus according to claim 7, characterized in that, The angle between the surface of the first top cover near the receiving space and the surface of the second top cover near the receiving space is less than 180°.

9. The testing apparatus according to claim 7, characterized in that, The projected area of ​​the first top cover on the bottom wall of the box is equal to the projected area of ​​the second top cover on the bottom wall of the box, and the number of salt spray nozzles provided on the first top cover is the same as the number of salt spray nozzles provided on the second top cover.

10. The testing apparatus according to claim 1, characterized in that, A flow guide groove is provided on the bottom wall of the box near the second end. The flow guide groove extends along a second direction, which is perpendicular to the first direction and the thickness direction of the top cover.

11. The testing apparatus according to any one of claims 1 to 10, characterized in that, The salt spray device also includes a storage tank, which is located outside the main body and is used to store salt solution.

12. The testing apparatus according to claim 11, characterized in that, The salt spray device also includes a connecting pipe, which is at least partially disposed inside the top cover and communicates with the salt spray nozzle. The end of the connecting pipe away from the salt spray nozzle is connected to the liquid storage tank.

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