KR-102964094-B1 - Battery Case Leak Test Device

Abstract

The present invention relates to a battery case leak test device, and more specifically, to a battery case leak test device characterized by sequentially performing pressurization and vacuuming for a leak test of a battery case cell as a method for testing the case leak of an AGM battery for vehicles. The present invention is characterized in that it comprises, in a vehicle battery case leak test device, a battery case heat-fused with a cover; a conveyor for transporting the battery case; a fixing bar and a moving bar located on both sides of the conveyor for fixing the vertical and horizontal positions of the transported battery case; a lift for transporting a Step 1 assembly to a Step 2 assembly up and down, which is in close contact with an electrolyte injection port formed on one side of the battery cover; a pressurizing circuit and a vacuum circuit connected to the step assembly; and a discharge actuator for discharging the leak test defective product. The present invention performs leak inspection by sequentially applying pressurization and vacuum, thereby ensuring leak quality at the cell level. Since it utilizes air, the inspection is inexpensive and time-consuming, allowing it to be installed in conjunction with automated battery manufacturing lines and offering the advantage of performing a full inspection.

Inventors

• 이장환
• 이은열

Assignees

• (주)제이엔엘테크

Dates

Publication Date

20260512

Application Date

20250725

Claims (4)

1. In a vehicle battery case leak test device, A cover (2) and a heat-fused battery case (1); A conveyor for transporting the above battery case (1) and: A fixed bar and a moving bar located on both sides of the above conveyor and fixing the vertical and horizontal positions of the transported battery case; A lift for vertically transporting Step 1 assembly (10) to Step 2 assembly (20), which are sequentially in contact with an electrolyte injection port formed on one side of the battery cover; A pressurizing circuit (40) and a vacuum circuit (30) connected to the above Step 1 assembly (10) to Step 2 assembly (20); A discharge actuator for discharging defective leak inspection products; provided. The above Step 1 assembly (10) is, A nozzle housing (11) having a lift connecting bar (11-1) connected to the lift, a bushing (11-2) connecting the lift connecting bar (11-1) and the nozzle holder (11-3), and a nozzle holder (11-3) connected sequentially to a vacuum nozzle (36) and a pressurizing nozzle (45); A vacuum nozzle (36) connected to a vacuum circuit and fastened to a hole in the nozzle holder (11-3); A pressure nozzle (45) connected to a pressure circuit and fastened to a hole in the nozzle holder (11-3) is arranged sequentially, and The above Step 2 assembly (20) is, A nozzle housing (11) having a lift connecting bar (11-1) connected to the lift, a bushing (11-2) connecting the lift connecting bar (11-1) and the nozzle holder (11-3), and a nozzle holder (11-3) connected sequentially to a pressure nozzle (45) and a vacuum nozzle (36); A pressure nozzle (45) connected to the nozzle holder (11-3) and connected to the pressure circuit (30); A battery case leak test device characterized by sequentially arranging vacuum nozzles (36) that are connected to the nozzle holder (11-3) and connected to a vacuum circuit (40).
2. In a vehicle battery case leak test device, A cover (2) and a heat-fused battery case (1); A conveyor for transporting the above battery case (1) and: A fixed bar and a moving bar located on both sides of the above conveyor and fixing the vertical and horizontal positions of the transported battery case; A lift for moving a Step 1 assembly (10) up and down, which is in close contact with an electrolyte injection port formed on one side of the battery cover; A pressurizing circuit (40) and a vacuum circuit (30) connected to the above Step 1 assembly (10); A discharge actuator for discharging defective leak inspection products; provided. The above Step 1 assembly (10) is, A nozzle housing (11) having a lift connecting bar (11-1) connected to the lift, a bushing (11-2) connecting the lift connecting bar (11-1) and the nozzle holder (11-3), and a nozzle holder (11-3) connected sequentially to a vacuum nozzle (36) and a pressurizing nozzle (45); A vacuum nozzle (36) connected to a vacuum circuit (30) and fastened to a hole in the nozzle holder (11-3); A pressure nozzle (45) connected to a pressure circuit and fastened to a hole in the nozzle holder (11-3) is arranged sequentially. A battery case leak test device characterized by further including a switching valve (50) between the vacuum circuit (30) to the pressurizing circuit (40) and the vacuum nozzle (36) to the pressurizing nozzle (45).
3. In Article 1, The above Step 1 assembly (10) to Step 2 assembly (20) are, A battery case leak test device characterized by being a cartridge type that fits the battery specifications, and being replaced to fit the battery specifications when the battery specifications are changed.
4. delete

Description

Battery Case Leak Test Device The present invention relates to a battery case leak test device, and more specifically, to a battery case leak test device characterized by sequentially performing pressurization and vacuuming for a leak test of a battery case cell as a method for testing the case leak of an AGM battery for vehicles. A vehicle battery consists of a positive plate, a negative plate, and a separator to prevent short circuits between the plates. The conventional manufacturing process of a vehicle battery involves sequentially stacking the positive and negative plates, forming straps and posters on the terminals of the stacked plates in battery cell units by casting, sequentially inserting them into a battery case (1), connecting the straps in series by spot welding to form terminals, sealing with a battery cover (2), injecting an electrolyte, and completing the battery by charging the battery with electricity. The present invention relates to a device for checking the sealing state of the battery case and cover and whether each cell unit is sealed by heating the edges of the battery case (1) and battery cover (2) during the above manufacturing process and applying pressure to the molten portion to heat-fuse the battery case and cover. AGM batteries utilize an absorbent glass mat to provide high discharge performance (CCA) and a long lifespan, with the core technology being the sealing of the electrolyte in each cell. Conventional battery case leak inspections used methods such as placing a sample of the battery in a water tank and pressurizing it with air, N2 gas, or He gas to check for leaks, or using technology that pressurized gas on a cell-by-cell basis to check for sealing and leakage. A representative prior art is Published Patent Application No. 10-2003-0049130A, and the said technology relates to N2 gas and N2 gas A technology is disclosed that can reduce manufacturing costs by replacing He gas and He gas detection sensors using a pressurized nozzle. Regarding automotive battery leak inspection, Published Patent Application 10-2023-0094031A discloses a technology that determines whether a battery case leak has occurred by pressurizing the automotive battery case with air, and Published Patent Application 10-2021-0079453A discloses a technology that inspects sealing performance through a watertightness test using a water tank and a leak detection agent. Conventional tank leak inspections are limited to sample inspections, and while leak inspections using pressurization allow for 100% inspection, they have the problem of being unable to ensure quality reliability. Therefore, there is a need for technology that can ensure the reliability of leak testing while performing 100% leak testing on automotive batteries and AGM batteries. FIG. 1 is a perspective view of a preferred embodiment of a battery case leak test device. Figure 2 is an internal configuration diagram of the battery case. Figure 3 is a front view of a battery case leak test device. Figure 4 is an operating state diagram of a battery case leak test device. FIG. 5 is a configuration diagram of the vacuum circuit (30) and pressurization circuit (40) of the battery case leak test device. FIG. 6 is a configuration diagram of the vacuum circuit (30) and pressurization circuit (40) of the battery case leak test application technology. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description (such as electrical circuits, other required components, etc.) have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size, color, and thickness of each component shown in the drawings are depicted arbitrarily for the convenience of explanation, and thus the present invention is not necessarily limited to what is shown in the drawings. Although the colors of the components are expressed as in the drawings to clearly represent various parts and regions, it is evident that the scope of the patent rights includes a wide range of colors. The thickness or size of the drawings or components has also been enlarged to ensure clarity of representation. Additionally, the thickness of certain parts and areas in the drawings has been exaggerated for the convenience of explanation. The present invention relates to a battery case leak test device, and more specifically, to a battery case leak test device characterized by sequentially performing pressurization and vacuuming for a leak test of a battery case cell as a method for testing the case leak of an AGM battery for vehicles. The main objectives to be disclosed in this invention are three