Automobile power battery pack air tightness detection equipment

Abstract

The utility model provides a kind of automobile power battery package air tightness detection equipment, including cabinet, hinged cabinet door is equipped on cabinet, and handle is equipped on cabinet door;Multiple cavities are divided into by multiple partitions in cabinet, and placing rack for placing battery package is equipped on partition, and the top of each cavity is equipped with electric push rod, and the telescopic end of electric push rod is connected with sealing cover by pressure sensor;Intake port is equipped in the side wall of cabinet corresponding each cavity, and one-way valve is equipped at intake port, and air pump is equipped on the top of cabinet, and the outlet of air pump is connected with the one end of one end closed connecting pipe, and multiple branch pipes are equipped on connecting pipe, and the branch pipe is connected with intake port respectively;Air pressure monitoring assembly is equipped in the side wall of cabinet corresponding each cavity;Electric push rod, air pump are electrically connected with controller arranged in the side wall of cabinet.The battery package air tightness detection device provided in the application, its structure design not only is convenient for simultaneously detecting multiple battery packages, and detection mode is simple and practical and easy to operate.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack airtightness testing technology, specifically relating to an airtightness testing device for automotive power battery packs. Background Technology

[0002] The airtightness of the battery pack is an important performance indicator. Therefore, it is essential to conduct airtightness testing on the battery pack during the production process to prevent short circuits caused by air or water leakage.

[0003] Currently, battery pack airtightness testing primarily employs the differential pressure method. This involves inflating the battery pack with air and then observing whether the pressure difference between the inside and outside of the pack changes. If the pressure difference changes, the battery pack has poor airtightness; if the pressure difference remains relatively constant, the battery pack has good airtightness. However, this method results in excessive internal pressure, which can easily cause the battery pack's top cover to be pushed open, thus compromising the pack's seal. Furthermore, since battery packs contain numerous components, some of which have space for gas, inflating the pack to test its airtightness increases the inflation time and reduces the efficiency of the airtightness test.

[0004] To address this issue, we propose a device for testing the airtightness of automotive power battery packs. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a new device for testing the airtightness of automotive power battery packs. The specific solution is as follows:

[0006] An airtightness testing device for automotive power battery packs includes a cabinet with a hinged door and multiple support legs at the bottom. The door has a handle. The cabinet is divided into multiple cavities by partitions, each with a shelf for holding the battery pack. Each cavity has an electric push rod at its top, with the extension end connected to a sealing cover via a pressure sensor. Each cavity has an air inlet on its side wall corresponding to each cavity, with a one-way valve at each inlet. An air pump is located at the top of the cabinet, its outlet connected to one end of a sealed connecting pipe with multiple branch pipes connected to the air inlets. Each cavity has a pressure monitoring component on its side wall. The electric push rod and air pump are electrically connected to a controller mounted on the side wall of the cabinet.

[0007] Based on the above, the air pressure monitoring component includes a cylinder, with an exhaust port at the top and an air inlet at the bottom. The air inlet is connected to the internal cavity of the cabinet via an air supply pipe. A piston plate is slidably disposed inside the cylinder, and scale lines are provided on the side wall of the cylinder.

[0008] Based on the above, the cabinet is equipped with an electromagnet, and the cabinet door is equipped with a metal block corresponding to the electromagnet. The electromagnet is electrically connected to the controller.

[0009] Based on the above, the bottom of the sealing cover and the top of the placement rack are both provided with rubber.

[0010] Based on the above, an observation window is provided on each cavity on the cabinet door.

[0011] Based on the above, the cabinet body, partitions and cabinet doors are provided with corresponding magnetic sealing strips.

[0012] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0013] The battery pack airtightness testing device provided in this application involves first attaching the sealing cover to the separator, then introducing high-pressure gas at a certain pressure, and then lifting the sealing cover to observe the pressure change in the air pressure monitoring component. Next, the battery pack is placed on the separator and covered by the sealing cover. Then, a certain amount of high-pressure gas is introduced into the cavity, and the sealing cover is lifted. By observing the change in the air pressure monitoring component, the airtightness of the battery pack can be determined. This testing method does not damage the battery pack and has high testing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0016] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Shelf; 4. Shelf; 5. Battery pack; 6. Sealing cover; 7. Electric actuator; 8. Air inlet; 9. Connecting pipe; 10. Air pump; 11. Air pressure monitoring component; 11-1. Cylinder; 11-2. Air inlet; 11-3. Exhaust port; 11-4. Piston plate; 11-5. Air supply pipe; 11-6. Scale line; 12. Electromagnet; 13. Observation window; 14. Controller; 15. Support leg; 16. Magnetic sealing strip; 17. Handle. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0018] Example 1

[0019] like Figure 1-2As shown, this utility model provides an airtightness testing device for automotive power battery packs, including a cabinet 1, a cabinet door 2 hinged to the cabinet 1, multiple support legs 15 at the bottom of the cabinet 1, and a handle 17 on the cabinet door 2; the cabinet 1 is divided into multiple cavities by multiple partitions 3, and a placement rack 4 for placing battery packs 5 is provided on the partitions 3; each cavity has an electric push rod 7 at its top, and the telescopic end of the electric push rod 7 is connected to a sealing cover 6 through a pressure sensor; each cavity has an air inlet 8 on the side wall of the cabinet 1, with a one-way valve at each air inlet 8; an air pump 10 is provided at the top of the cabinet 1, and the outlet of the air pump 10 is connected to one end of a closed connecting pipe 9, with multiple branch pipes on the connecting pipe 9 respectively connected to the air inlets 8; each cavity has an air pressure monitoring component 11 on the side wall of the cabinet 1; the electric push rod 7 and the air pump 10 are electrically connected to a controller 14 located on the side wall of the cabinet 1.

[0020] The aforementioned air pressure monitoring component 11 includes a cylinder 11-1, with an exhaust port 11-3 at the top and an air inlet 11-2 at the bottom. The air inlet 11-2 is connected to the internal cavity of the cabinet 1 via an air supply pipe 11-5. A piston plate 11-4 is slidably disposed inside the cylinder 11-1, and scale lines 11-6 are provided on the side wall of the cylinder 11-1.

[0021] To ensure a secure seal between the cabinet body 1 and the cabinet door 2, an electromagnet 12 is provided on the cabinet body 1, and a metal block corresponding to the electromagnet 12 is provided on the cabinet door 2. The electromagnet 12 is electrically connected to the controller 14.

[0022] The bottom of the sealing cover 6 and the top of the placement rack 4 are both provided with rubber.

[0023] When testing the airtightness of the battery pack 5, an observation window 13 is provided on the cabinet door 2 for each cavity to facilitate observation of the pressure changes inside the cabinet 1.

[0024] The cabinet body 1, the partition 3 and the cabinet door 2 are provided with corresponding magnetic sealing strips 16.

[0025] The specific working principle of this utility model is as follows: When using this device, first, the sealing cover 6 is attached to the partition 3, and then high-pressure gas of a certain pressure is introduced. Then, the sealing cover 6 is lifted, and the pressure change in the air pressure monitoring component 11 is observed. Then, the battery pack 5 is placed on the partition 3, and then covered by the sealing cover 6. Next, a certain amount of high-pressure gas is introduced into the cavity, and then the sealing cover 6 is lifted. By observing the change in the air pressure monitoring component 11, the airtightness of the battery pack 5 can be determined. This detection method will not damage the battery pack 5, and the detection efficiency is high.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An airtightness testing device for automotive power battery packs, characterized in that: The cabinet includes a cabinet body (1), on which a cabinet door (2) is hinged. Multiple support legs (15) are provided at the bottom of the cabinet body (1), and a handle (17) is provided on the cabinet door (2). The cabinet body (1) is divided into multiple cavities by multiple partitions (3). Each partition (3) has a shelf (4) for placing a battery pack (5). Each cavity has an electric push rod (7) at its top, and the telescopic end of the electric push rod (7) is connected to a sealing cover (6) via a pressure sensor. The side walls of the cabinet body (1) correspond to each… Each of the cavities is provided with an air inlet (8), and a one-way valve is provided at the air inlet (8). An air pump (10) is provided at the top of the cabinet (1). The outlet of the air pump (10) is connected to one end of a connecting pipe (9) that is closed at one end. Multiple branch pipes are provided on the connecting pipe (9) that are respectively connected to the air inlet (8). A pressure monitoring component (11) is provided on the side wall of the cabinet (1) corresponding to each of the cavities. The electric push rod (7) and the air pump (10) are electrically connected to the controller (14) provided on the side wall of the cabinet (1).

2. The automotive power battery pack airtightness testing equipment according to claim 1, characterized in that: The air pressure monitoring component (11) includes a cylinder (11-1), the top of the cylinder (11-1) is provided with an exhaust hole (11-3), the bottom of the cylinder (11-1) is provided with an air inlet (11-2), the air inlet (11-2) is connected to the internal cavity of the cabinet (1) through an air supply pipe (11-5), a piston plate (11-4) is slidably provided inside the cylinder (11-1), and scale lines (11-6) are provided on the side wall of the cylinder (11-1).

3. The automotive power battery pack airtightness testing equipment according to claim 1, characterized in that: The cabinet (1) is equipped with an electromagnet (12), and the cabinet door (2) is equipped with a metal block corresponding to the electromagnet (12). The electromagnet (12) is electrically connected to the controller (14).

4. The automotive power battery pack airtightness testing equipment according to claim 1, characterized in that: The bottom of the sealing cover (6) and the top of the placement rack (4) are both provided with rubber.

5. The automotive power battery pack airtightness testing equipment according to claim 1, characterized in that: Each of the cavities is provided with an observation window (13) on the cabinet door (2).

6. The automotive power battery pack airtightness testing equipment according to claim 1, characterized in that: The cabinet (1), partition (3) and cabinet door (2) are provided with corresponding magnetic sealing strips (16).

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