A battery pack tightness test device

Abstract

The utility model relates to a kind of battery pack airtightness test equipment, including detection frame, detection frame upper fixedly connected with height frame, height frame upper fixedly connected with electric push rod, electric push rod output end is still fixedly connected with concave frame in one end of the height frame penetration, concave frame lower fixedly connected with conveying pipe, concave frame inside is connected with elbow pipe, conveying pipe outer wall is provided with air bag, concave frame is connected with the inflation assembly for the inflation of air bag, height frame upper fixedly connected with second air pump, second air pump upper fixedly connected with bellows, bellows is fixedly connected with elbow pipe at the end away from second air pump and penetration still, further include lifting frame, detection frame sliding connection is in the side wall of lifting frame, after moving into battery pack interface position by air bag, start inflation assembly to make air bag swell, to realize the sealing of battery pack interface place, it is favorable to improve applicability.

Description

Technical Field

[0001] This utility model relates to the field of battery pack safety testing technology, specifically to a battery pack sealing test device. Background Technology

[0002] As a core component of pure electric vehicles, the safety of the battery pack is of paramount importance. Its development must meet high design standards for strength, rigidity, heat dissipation, waterproofing, and insulation. Among these, sealing performance is a key indicator for measuring quality, making airtightness testing particularly important. To ensure the smooth conduct of the test, a test air inlet is specially reserved during the production of the battery pack. The test is based on the principle of pressure decay, that is, pressurized gas is injected into the battery pack through this air inlet, and then the gas supply is cut off. By monitoring the changes in internal pressure, its sealing performance can be accurately evaluated.

[0003] However, the existing technology still has the following shortcomings in use: the existing pressure head can only match the air inlet of the battery pack of the corresponding size, resulting in insufficient versatility. When testing the interface of different battery pack models, it is necessary to frequently change the pressure head that matches the battery pack interface, which takes a long time and affects production efficiency. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a battery pack sealing test device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A battery pack airtightness testing device includes a testing frame, a height frame fixedly connected above the testing frame, an electric push rod fixedly connected above the height frame, a concave frame fixedly connected to the output end of the electric push rod passing through one end of the height frame, a delivery pipe fixedly connected below the concave frame, a bent pipe connected inside the concave frame, an airbag provided on the outer wall of the delivery pipe, an inflation component for inflating the airbag connected to the concave frame, a second air pump fixedly connected above the height frame, a corrugated pipe fixedly connected to the second air pump, the end of the corrugated pipe away from the second air pump passing through the concave frame and fixedly connected to the bent pipe, and a lifting frame, with the testing frame slidably connected to the side wall of the lifting frame.

[0006] The beneficial effects of this utility model are: after the airbag on the concave frame is moved to the battery pack interface position by the electric push rod, the airbag is inflated by the inflation component, thereby sealing the interface of the battery pack, thus adapting to battery pack interfaces of different sizes and making it more versatile.

[0007] Furthermore, the inflation assembly includes a first air pump fixedly connected to the concave frame, an inflation tube fixedly connected to the first air pump, and the end of the inflation tube away from the first air pump is also fixedly connected to the airbag.

[0008] The beneficial effects of this utility model are: by starting the first air pump to generate gas, the gas enters the airbag through the inflation tube, thereby causing the airbag to inflate and making it more convenient to use.

[0009] Furthermore, the first air pump, inflation tube, and airbag are connected together, and the second air pump, corrugated tube, bend, and delivery tube are connected together.

[0010] The beneficial effects of this utility model are: the gas generated by the second air pump passes through the corrugated pipe and the bend, and is then discharged through the delivery pipe, which helps to improve the convenience of gas delivery.

[0011] Furthermore, an air inlet valve is installed on the corrugated pipe, a pressure gauge is installed on the bend, and an air filling and emptying valve is installed on the inflation pipe.

[0012] The beneficial effects of this utility model are: by setting up a pressure gauge, it is more convenient to observe the air pressure inside the battery pack, and the set inflation and deflation valve can realize the convenience of sealing and releasing the gas inside the airbag.

[0013] Furthermore, the airbag comprises an upper layer, a middle layer, and a lower layer.

[0014] The beneficial effect of this utility model is that the three-layer design of the airbag can further improve the sealing of the battery pack interface.

[0015] Furthermore, a cylinder is fixedly connected below the lifting frame, and the output end of the cylinder is fixedly connected to the detection frame.

[0016] The beneficial effect of this utility model is that the height of the testing frame can be adjusted more conveniently by setting up a cylinder. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the positional relationship between the lifting frame, the testing frame, and the cylinder of this utility model; Figure 3 This is a schematic diagram showing the positional relationship between the second air pump and the bellows of this utility model; Figure 4 This is a schematic diagram showing the positional relationship between the electric push rod, the concave frame, and the airbag of this utility model; Figure 5 This utility model Figure 3 Enlarged schematic diagram of structure A in the middle.

[0018] The attached diagram lists the components represented by each number as follows: 100. Testing frame; 101. Height frame; 102. Electric push rod; 103. Concave frame; 104. Conveying pipe; 105. Airbag; 106. Second air pump; 107. Corrugated pipe; 108. Lifting frame; 109. Bend; 110. First air pump; 111. Inflation pipe; 112. Inlet valve; 113. Pressure gauge; 114. Inflation and exhaust valve; 120. Cylinder. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and 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.

[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0022] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0023] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0024] Example 1 like Figure 1 , Figure 2 and Figure 5 As shown, the device includes a testing frame 100, a height frame 101 fixedly connected above the testing frame 100, an electric push rod 102 fixedly connected above the height frame 101, a concave frame 103 fixedly connected to the output end of the electric push rod 102 passing through one end of the height frame 101, a delivery pipe 104 fixedly connected below the concave frame 103, a bent pipe 109 connected inside the concave frame 103, an airbag 105 provided on the outer wall of the delivery pipe 104, an inflation assembly for inflating the airbag 105 connected to the concave frame 103, a second air pump 106 fixedly connected above the height frame 101, and a corrugated pipe 107 fixedly connected to the second air pump 106. The corrugated pipe 107, with one end away from the second air pump 106, passes through the concave frame 103 and is fixedly connected to the bend 109. It also includes a lifting frame 108, with the test frame 100 slidably connected to the side wall of the lifting frame 108. The inflation assembly includes a first air pump 110 fixedly connected to the concave frame 103, with an inflation pipe 111 fixedly connected to the first air pump 110. The end of the inflation pipe 111 away from the first air pump 110 is also fixedly connected to the airbag 105. Through the setting of the corrugated pipe 107, when the electric push rod 102 drives the concave frame 103 to move up and down, the corrugated pipe 107 can be folded, which is beneficial to improving the use effect when testing the sealing performance of the battery pack.

[0025] Example 2 Based on Embodiment 1, the present invention can be further improved in the following ways, such as... Figure 4 and Figure 5As shown, the first air pump 110, the inflation pipe 111, and the airbag 105 are connected. The second air pump 106, the corrugated pipe 107, the bend 109, and the delivery pipe 104 are connected. An air inlet valve 112 is installed on the corrugated pipe 107, a pressure gauge 113 is installed on the bend 109, and an inflation / deflation valve 114 is installed on the inflation pipe 111. The airbag 105 includes an upper layer, a middle layer, and a lower layer. It is positioned above the pressure gauge 113 via the air inlet valve 112. When the air inlet valve 112 is closed to achieve a seal, the air pressure inside the battery pack can be observed more accurately.

[0026] Example 3 Based on Embodiment 2, the present invention can be further improved in the following ways, such as... Figure 2 As shown, a cylinder 120 is fixedly connected to the lower part of the lifting frame 108. The output end of the cylinder 120 is fixedly connected to the testing frame 100. The height of the testing frame 100 can be adjusted by the cylinder 120, so as to adapt to the height of different operators and improve the convenience of testing.

[0027] Specifically, when using the device: First, the cylinder 120 is activated to drive the testing frame 100 to move along the lifting frame 108 to a height suitable for operation. After placing the battery pack on the testing frame 100, the electric push rod 102 is activated to push the concave frame 103 downward. By moving the battery pack position, the airbag 105 is aligned with the battery pack interface. The operator inserts the lower layer of the airbag 105 into the battery pack and positions the middle layer at the interface. At the same time, it is ensured that the delivery pipe 104 enters the battery pack through the interface. Then, the first air pump 110 is activated, and gas is injected into the airbag 105 through the inflation pipe 111, causing it to inflate. At this time, the middle layer of the airbag 105 blocks the battery pack interface. The upper and lower layers form an effective seal on the upper and lower sides of the interface, thereby adapting to interfaces of different sizes and improving sealing performance. Then, the second air pump 106 is started, and gas is injected into the battery pack through the bellows 107 and the bend 109 via the delivery pipe 104. The internal air pressure is monitored by the pressure gauge 113. After inflation is complete, the second air pump 106 is turned off, and the air inlet valve 112 maintains the airtight state inside the battery pack. The sealing performance of the battery pack can be evaluated by observing the reading of the pressure gauge 113. After the test is completed, the inflation and deflation valve 114 is opened to release the gas in the airbag 105. Then, the electric push rod 102 retracts, causing the airbag 105 to detach from the battery pack interface, making it more practical.

[0028] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A battery pack airtightness testing device, comprising a testing frame (100), characterized in that, A height frame (101) is fixedly connected above the detection frame (100), and an electric push rod (102) is fixedly connected above the height frame (101). A concave frame (103) is also fixedly connected to one end of the electric push rod (102) that passes through the height frame (101). A conveying pipe (104) is fixedly connected below the concave frame (103). A bent pipe (109) is connected inside the concave frame (103), and an airbag (105) is provided on the outer wall of the conveying pipe (104). An inflation assembly for inflating the airbag (105) is connected to the concave frame (103). A second air pump (106) is fixedly connected above the height frame (101). A corrugated pipe (107) is fixedly connected to the second air pump (106). The end of the corrugated pipe (107) away from the second air pump (106) passes through the concave frame (103) and is also fixedly connected to the bend pipe (109). The frame also includes a lifting frame (108). The detection frame (100) is slidably connected to the side wall of the lifting frame (108).

2. The battery pack sealing performance testing device according to claim 1, characterized in that, The inflation assembly includes a first air pump (110) fixedly connected to a concave frame (103), an inflation tube (111) fixedly connected to the first air pump (110), and an end of the inflation tube (111) away from the first air pump (110) fixedly connected to an airbag (105).

3. The battery pack sealing performance testing device according to claim 2, characterized in that, The first air pump (110), the inflation pipe (111) and the air bag (105) are connected together, and the second air pump (106), the corrugated pipe (107), the bend (109) and the delivery pipe (104) are connected together.

4. The battery pack sealing performance testing device according to claim 2, characterized in that, An air inlet valve (112) is installed on the corrugated pipe (107), a pressure gauge (113) is installed on the bend (109), and an air filling and emptying valve (114) is installed on the air filling pipe (111).

5. The battery pack sealing performance testing device according to claim 1, characterized in that, The airbag (105) includes an upper layer, a middle layer and a lower layer.

6. The battery pack sealing performance testing device according to claim 1, characterized in that, A cylinder (120) is fixedly connected below the lifting frame (108), and the output end of the cylinder (120) is fixedly connected to the detection frame (100).

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