CN101696899B - Maintenance-free detection device and method thereof of air tightness of small cell cover - Google Patents

Abstract

The invention relates to a maintenance-free detection device and a method thereof for the air tightness of a small cell cover, aiming at the problem that the traditional detection device and method are difficult to effectively detect the air leakage of an accumulator cell. The detection device comprises a water tank, the water tank is provided with a liftable device rack which is horizontally provided with a support plate; symmetrical and translational L-shaped stop levers are arranged below both sides of the support plate; the outer ends of the stop levers are provided with core plugs; the support plate is also provided with an inflation device which inflates through a through hole of an electrohydraulic display; and the air inflation device comprises an inflation head. The invention changes the traditional detection method of exposing in the air into the detection device and method of immersing in water, has the advantages of uniform specifications and no deviation and is convenient to routinize the product detection.

Description

Maintenance-free battery small cover water bath airtightness detection device and method

technical field

The invention belongs to the technical field of air-tightness detection of lead-acid batteries, and in particular relates to an air-tightness detection device and method for a maintenance-free battery small cover.

Background technique

During the manufacturing process of the maintenance-free starting battery, the battery cover is a secondary heat-sealed structure. After the small cover is heat-sealed, it is necessary to conduct an air-tightness test. This is a very important process. Air leakage will cause the battery to break explode. The current detection method is: block the exhaust holes at both ends of the small battery cover exposed in the air with rubber plugs, one end of the plug has an air-filled hole, when the two ends of the small battery cover are blocked, Inflate the inflation hole again, and check whether it is sealed well through the instrument.

However, during the testing process, due to the large impact force during inflation and the small vent hole of the small cap, in the case of a deviation in the positioning of the plug, the vent hole of the small cap is likely to be damaged during inflation. If it cannot be discovered in time, it will be discovered when the secondary heat sealing of the battery is completed, which will cause the damaged vent hole to be repaired and cause the battery to be scrapped. On the other hand, it is not easy to detect small air leakage effectively by using this air tightness test method to test the battery, and liquid leakage often occurs during subsequent use. In addition, the existing air tightness testing methods vary according to the testing experience and proficiency of different testing personnel, which may also easily lead to deviations in testing conclusions.

Contents of the invention

The object of the present invention is to provide a maintenance-free airtightness detection device and method for a small battery cover, which can accurately and effectively detect the airtightness of the small battery cover and ensure reliable detection conclusions.

For this reason, the present invention adopts the following technical scheme, the maintenance-free battery small cover water bath air-tightness detection device, which is characterized in that it comprises a water tank, a device frame that can be lifted and lowered is provided in the water tank, and a support plate is horizontally provided in the device frame, and the support plate There are symmetrical "L"-shaped stop rods that can translate in translation under the two sides, and the outer end of the stop rod is provided with a plug. The support plate is also provided with an inflatable device that inflates through the through hole of the electro-hydraulic display. The inflation device includes an inflation head. The airtightness detection of the small battery cover exposed to the air by manual means is improved to mechanized detection by immersion in water, which effectively improves the detection quality. The "L" shaped bar is a mechanical arm with high strength, which can firmly seal the vent holes at both ends of the small battery cover to avoid air leakage due to insufficient sealing force during the pressurization process. The existing method of inflating the air vents at both ends of the small battery cover is changed to inflating the through holes of the electro-hydraulic display, which is safe and reliable.

As a further improvement and optimization of the present invention, the device frame includes an upper table and a lower table parallel to each other, the upper table is connected to a fixed plate through a guide post, and the guide post is controlled by a cylinder to lift the device frame. Using the cylinder to control the guide column to realize the free lifting up and down of the device frame is more labor-saving than manually lifting the battery.

The two ends of the upper table and the lower table are connected by a vertical plate, and a vertical chute is opened on the side of the vertical plate, and the support plate is connected to the fixed plate through the lifting guide column, and the lifting guide column is controlled by the cylinder. The support plate lifts. Using the pressure of the cylinder to control the up and down movement of the support plate can meet the detection position requirements of batteries of different specifications, and keep the inflatable head closely attached to the through hole of the electro-hydraulic display to ensure good air tightness during the inflation process.

The support plate is provided with a plurality of pairs of stop rods and inflation devices, and the support plate is provided with a plurality of parallel adjustment slots, and the stop rods and inflation heads are matched with the adjustment slots through connectors. It can simultaneously test the air tightness of multiple small battery covers, which is convenient for parallel and vertical fine-tuning of the stop rod and the inflation head, so that it can match the vent holes at both ends of different types of battery small covers and the through holes of the electro-hydraulic display. The scope of application and detection efficiency of the device are improved.

The outer ends of the inflatable head and the plug are provided with gaskets, and the gaskets are rubber, and the rubber is provided with plugging holes and one side is bonded to the sealing surface of the outer ends of the plug and the inflatable head. The rubber is generally industrial vulcanized rubber, and the concave holes on the rubber can cover the vent holes at both ends of the battery and the through holes of the electro-hydraulic display, and the sealing effect is better.

The invention of the above-mentioned detection device has changed the existing detection steps for detecting the airtightness of the small cover. The method for detecting the airtightness of the maintenance-free battery small cover in a water bath using the above-mentioned device is as follows: ① inject water into the water tank; Position it on the lower platform of the device frame; ③ Block the vent holes at both ends of the small battery cover with the plugs at the outer end of the "L"-shaped stop rod, and connect the inflation head to the through hole of the electro-hydraulic display; ④ Lower the device frame Put it into the water tank; ⑤ Pressurize the battery, keep the pressure at 30-40kpa, cut off the air source for 3-10 seconds, observe the water surface or display the instrument; ⑥ Lift the device rack out of the water and take out the battery. Because directly inflating the plug will cause damage to the vent holes at both ends of the small cover due to excessive inflation pressure, and the through hole diameter of the electro-hydraulic display is relatively large, so it is relatively safe to directly inflate it, and will not cause damage to the battery. After the battery is completely sealed, it is submerged in water and then pressurized. If the small cover leaks, air bubbles will appear on the water surface, which can be seen intuitively; this detection method can also be used to see whether there is air leakage in the small cover through the change of the pressure gauge. .

The beneficial effect of the present invention is reflected in: changing the existing detection method exposed in the air to a detection device and method submerged in water, and then pressurizing and inflating the storage battery after being placed in water, the smaller air leakage phenomenon can be reduced from The air bubbles produced in the water can be seen, and the larger air leakage can be detected by the pressure gauge at the same time. Using the above method to detect the tightness of the small battery cover is more intuitive and clear than simply detecting the internal pressure change of the battery through a pressure gauge. On the other hand, the present invention inflates through the through hole of the electro-hydraulic display, which changes the inflating port of the existing product, and the inflating process is safe, and will not cause secondary damage to the small battery cover and lead to scrapping. The improved detection method is realized through the set steps and devices, which has the advantages of uniform specification and no deviation, which facilitates the programmatic testing of products and avoids the defects of differences in manual experience and operating proficiency in the past.

Description of drawings

Fig. 1 is a schematic structural diagram of the detection device of the present invention.

Fig. 2 is a schematic structural view of the device rack of the present invention.

In the figure 1. Water tank 2. Stop rod 3. Inflatable head 4. Support plate 5. Device frame 6. Fixed plate 7. Guide post 8. Cylinder 9. Water level 10. Connector 11. Battery 12. Lifting guide post 13. Cylinder 21. Plug 22. Gasket 51. Upper table 52. Lower table 53. Riser.

Detailed ways

The substantive features of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 2: the maintenance-free battery small cover water bath airtightness detection device includes a fixed plate 6 and a water tank 1 below it, the lower part of the fixed plate 6 is provided with a device frame 5, and the device frame 5 consists of mutually parallel The upper table 51 and the lower table 52 constitute. The upper table 51 is connected to the fixed plate 6 through the guide column 7, and the guide column 7 is lifted and lowered by the cylinder 8, and a plurality of storage batteries 11 to be tested can be placed on the lower table 52. The upper table surface 51 and the lower table surface 52 are connected by vertical plates 7 located at both ends of the vertical plate 7. There are vertical slide grooves on both sides of the vertical plate 7. A support plate 4 is horizontally arranged between the two vertical plates 7. The support plate 4 passes through the lifting guide. Column 12 is connected with fixed plate 6, and is controlled by cylinder 13 to lift. There are a plurality of parallel adjustment grooves on the support plate 4, and a plurality of pairs of “L” shaped stop rods 2 are arranged symmetrically on both sides of the support plate 4. This type of stop rod 2 is a mechanical arm with high strength. An inflatable device (not fully shown in the figure) is provided between the rods 2 . The outer end of the retaining rod 2 is provided with a plug 21, and the inflation device includes a pressure gauge and an inflating head 3, and the upper ends of the retaining rod 2 and the inflating head 3 are connected with the adjusting groove through connecting pieces 10 such as bolts. The outer end of inflatable head 3 and plug 21 has sealing pad 22, and sealing pad 22 is rubber, and rubber has the sealing concave hole and one side is bonded on the sealing surface of plug 21 and inflatable head 3 outer ends.

According to the above device, the following detection methods can be adopted: ① inject water into the water tank 1; ② place the battery 11 to be tested on the lower table 52 of the device frame 5 and position it; The horizontal part of the battery is at the same level as the vent holes at both ends of the small cover. Loosen the bolts and other connecting parts 10 to adjust the position of the stopper rod 2, so that the plug 22 completely covers the vent holes at both ends of the battery, and press it with a mechanical arm. Tighten; ④ adjust the position of the inflatable head 3 so that it faces the through hole of the electro-hydraulic display of the battery 11, completely cover the through hole with the gasket 22, and press it tightly with the cylinder 13; ⑤ control the guide post 7 to descend through the cylinder 8 Whole device frame 5, the storage battery 11 that is placed on the lower platform 52 is dropped in the water tank 1, requires that storage battery 11 is fully submerged in the water (water level 9 is higher than battery loam cake plane); The hole is inflated, the pressure is 30-40kpa, and the air source is cut off for 3-10 seconds. See whether there are bubbles in the water tank 1 or check whether the pressure in the battery 11 changes within 3-10 seconds by a pressure gauge to judge the airtightness of the battery 11 . After the detection is completed, the storage battery 11 is raised from the water tank 1. If there is no air leakage, the product is qualified; if the product leaks, the product is repaired.

Claims (8)

1. The maintenance-free battery small cover water bath airtightness detection device is characterized in that it includes a water tank (1), the water tank (1) is provided with a liftable device frame (5), and the device frame (5) is horizontally provided with a support plate (4), under both sides of the support plate (4) is provided with a symmetrical "L" shaped stop rod (2) that can translate in translation, and the outer end of the stop rod (2) is provided with a plug (21). The supporting plate (4) is also provided with an inflating device through the through hole of the electro-hydraulic display, and the inflating device includes an inflating head (3). 2. According to the maintenance-free battery small cover water bath air-tightness detection device according to claim 1, it is characterized in that said device frame (5) includes an upper table (51) and a lower table (52) parallel to each other, and the upper table (51) is connected to a fixed plate (6) by guide post (7), and this guide post (7) is controlled device frame (5) lifting by a cylinder (8). 3. According to the maintenance-free battery small cover water bath air-tightness detection device according to claim 2, it is characterized in that the two ends of the upper table (51) and the lower table (52) are connected by a vertical plate (53), so The side of the vertical plate (53) has a vertical chute, the support plate (4) is connected to the fixed plate (6) through the lifting guide column (12), and the lifting guide column (12) is driven by the cylinder (13) Control support plate (4) lifting. 4. According to the maintenance-free battery small cover water bath air tightness detection device according to claim 3, it is characterized in that said support plate (4) is provided with a plurality of pairs of retaining rods (2) and inflation devices, and said support A plurality of parallel adjustment grooves are opened on the plate (4), and the stop rod (2) and the inflation head (3) are matched with the adjustment grooves through the connecting piece (10). 5. The maintenance-free battery small cover water bath airtightness detection device according to claim 1 or 4, characterized in that the outer ends of the inflation head (3) and the plug (21) are provided with a gasket (22) . 6. The maintenance-free battery small cover water bath airtightness detection device according to claim 5, characterized in that said gasket (22) is a rubber, and said rubber has a plugging hole and one side is bonded to the Plug (21) and the sealing surface of the inflation head (3) outer end. 7. The maintenance-free battery small cover water bath airtightness detection method is characterized in that the maintenance-free battery small cover water bath airtightness detection device is used to detect the airtightness of the battery small cover, and the following steps are taken in turn: ①In the water tank (1 ) into water; ② put the storage battery (11) to be tested on the lower table (52) of the device frame (5) and position it; Block the plug (21) at the outer end of the rod (2), and connect the inflation head (3) with the through hole of the electro-hydraulic display; ④ lower the device frame (5) to the water tank (1); ⑤ add the battery (11) After cutting off the air source, observe the water surface situation or display instrument; 6. put the device frame (5) out of the water surface and take out the storage battery (11). 8. According to the detection method according to claim 7, it is characterized in that the pressurized pressure is maintained at 30-40kpa, and the gas source is cut off for 3-10 seconds.

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