Device for detecting acid saturation of agm power lead-acid battery and method of using the same

Abstract

The present application relates to a kind of lead-acid battery detection technical field, specifically related to a kind of AGM power lead-acid battery acid saturation detection device and its use method.The detection frame is provided with acid liquid transfer mechanism in the detection frame, and the detection frame is provided with scale above acid liquid transfer mechanism, and the detection frame is provided with lifting platform above scale, and the AGM power lead-acid battery to be measured is located on lifting platform, and acid liquid transfer mechanism is communicated with communication pipe, and connecting mouth is installed on communication pipe, and connecting mouth can be sealed and inserted in the acid injection nozzle of the AGM power lead-acid battery to be measured.The expandable combination sealing pad consisting of second air bag and rubber strip on elastic sheet is set in the present application, the sealing performance between connecting mouth and acid injection nozzle can be guaranteed in the process of extracting acid liquid in the AGM power lead-acid battery to be measured, while the expanded elastic sheet can avoid piston cylinder from withdrawing from acid injection nozzle, and the stability and sealing performance of piston cylinder inserted into acid injection nozzle are good.

Description

Technical Field

[0001] This invention relates to the field of lead-acid battery testing technology, specifically to an AGM power lead-acid battery acid saturation testing device and its usage method. Background Technology

[0002] AGM lead-acid batteries are widely used in electric bicycles and tricycles due to their long lifespan, low cost, and reliable performance. This is because the AGM separator and the positive and negative electrodes of the finished battery have a certain proportion of "space" that is not occupied by acid (electrolyte). These "spaces" are connected to form oxygen recombination channels, allowing oxygen generated from the positive electrode during charging to reach the negative electrode and recombine with hydrogen to form water, which then returns to the electrolyte. This reduces water loss in the battery and ensures the battery's lifespan.

[0003] However, this ratio, namely the saturation of the electrolyte in the AGM separator, must be kept within a suitable range: if the saturation is too high, there will be too little "space," and the channels will be blocked, preventing oxygen recombination. The direct result is that oxygen and hydrogen will be discharged from the battery, leading to excessive water loss and ultimately causing thermal runaway and the end of the battery's lifespan. If the saturation is too low, there will be too much "space," which will directly result in relatively insufficient electrolyte, leading to insufficient acid content or thermal runaway during battery use and the end of the battery's lifespan.

[0004] Current saturation testing devices utilize an adapter that connects to the acid injection port on the AGM power lead-acid battery to perform acid extraction or addition. However, the adapter has poor sealing performance and is inconvenient for switching between negative pressure and normal pressure acid extraction. When the adapter leaks when connected to the acid injection port, the acid stored in the AGM separator cannot be effectively extracted during negative pressure acid extraction, thus affecting the accuracy of the acid saturation test results. Summary of the Invention

[0005] The technical problem to be solved by the present invention is an AGM power lead-acid battery acid saturation detection device and its usage method that can ensure the sealing performance between the connector and the acid injection port of the AGM power lead-acid battery under test, ensure the amount of acid extracted from the AGM power lead-acid battery under test, and thus ensure the accuracy of the test results.

[0006] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0007] An AGM power lead-acid battery acid saturation testing device includes a testing frame with an acid transfer mechanism inside. A scale is mounted on the testing frame above the acid transfer mechanism, and a lifting platform is mounted on the testing frame above the scale. The AGM power lead-acid battery to be tested is located on the lifting platform. The acid transfer mechanism is connected to a connecting pipe with a connector that can be sealed and inserted into the acid filling port of the AGM power lead-acid battery. The connector includes an acid filling tube, with a piston cylinder fixedly fitted around its outer side. An annular groove is formed on the upper outer edge of the piston cylinder, and a first air bladder is fitted inside the groove. A compression component is fitted inside the groove to compress the first air bladder. A pressure boosting component is slidably and sealingly connected between the piston cylinder and the acid filling tube. A pressure boosting component is located at the lower end of the piston cylinder. An elastic sheet has a rubber strip fixed to its upper end, and a strip-shaped second air bladder is fixedly connected to one side of the elastic sheet. The elastic sheet, the second air bladder, and the rubber strip are coiled in a vortex shape and located outside the acid filling tube. The second air bladder is located within the vortex-shaped space formed by the coiled elastic sheet. The upper end of the rubber strip slides in contact with the lower end of the piston cylinder. One end of the inner side of the elastic sheet is fixed to the lower end of the piston cylinder. A gas passage is opened at the lower end of the piston cylinder, and the gas passage communicates with the second air bladder. A sealing sleeve is provided on the sliding sealing sleeve of the acid filling tube above the pressurization assembly. Multiple air passages are opened on the tube wall of the acid filling tube. The upper and lower ends of the air passages communicate with the space outside the acid filling tube. The upper and lower ends of the air passages are located on the upper and lower sides of the piston cylinder, respectively. The sealing sleeve can block the upper end of the air passage.

[0008] The method for using the AGM power lead-acid battery acid saturation detection device includes the following steps:

[0009] Step 1: After the chemical production process, the AGM power lead-acid battery to be tested is charged. At this time, there is free acid above the AGM separator.

[0010] Step 2: Connect the suction pipe to the negative pressure source, operate the solenoid valve, close the balance pipe, open the acid suction pipe, and close the acid return pipe. Holding the connector, insert the piston cylinder of the connector into the acid injection port on the AGM power lead-acid battery under test, ensuring a sealed connection between the connector and the acid injection port. After inserting the piston cylinder into the acid injection port on the AGM power lead-acid battery under test, the baffle should be placed against the upper end of the acid injection port. The piston cylinder and the acid injection pipe should not move downwards. Then, press down on the connecting sleeve. The connecting sleeve, through the piston sleeve, drives the piston ring downwards. During the downward movement of the piston ring, the gas in the piston cylinder is forced into the second air bladder through the gas channel and hose. As the gas in the piston cylinder continuously enters the second air bladder, the second air bladder gradually expands, causing the elastic plate to expand outwards. During the expansion of the second air bladder, the second air bladder can interact with the elastic plate. The rubber strip at the end makes a sealing contact. After the second airbag and the rubber strip make a sealing contact, the second airbag and the rubber strip form a combined sealing gasket. As the second airbag continues to expand, the volume of the combined sealing gasket continues to increase. When the combined sealing gasket contacts the lower end of the acid injection nozzle, it can seal the lower port of the gap between the piston cylinder and the acid injection nozzle. At this time, the elastic sheet is blocked by the lower end of the acid injection nozzle. When the connecting sleeve contacts the upper end of the piston cylinder, the connecting sleeve is rotated so that the connecting sleeve is threadedly connected to the upper end of the piston cylinder. During the process of the connecting sleeve rotating and threadedly connected to the piston cylinder, the connecting sleeve rotates and moves downward. During the process of the connecting sleeve rotating and moving downward, it will push the sliding sleeve and the rubber ring downward. During the process of the rubber ring moving downward, it can squeeze the first airbag. After being squeezed, the first airbag expands. The expanded first airbag can make the acid injection nozzle and the piston cylinder seal together.

[0011] Step 3: Slide the sealing sleeve and use it to block the upper port of the air passage. Start the negative pressure source, and the suction pipe will begin to evacuate air. The free acid above the separator of the AGM power lead-acid battery under test will enter the return acid cylinder through the acid filling pipe, connecting pipe, and suction pipe. The air pressure inside the AGM power lead-acid battery under test will be the negative pressure state required by the process. After maintaining this state for 3-5 seconds, slide the sealing sleeve upward to connect the upper port of the air passage with the outside. Air from outside the AGM power lead-acid battery under test will enter the battery through the air passage, and the internal pressure of the battery will return to normal. This step will be repeated 2-3 times.

[0012] Step 4: Rotate the connecting sleeve to separate it from the piston cylinder. The piston sleeve then drives the piston ring upward. During the upward movement of the piston ring, the second air bladder contracts, and the elastic plate returns to its original position. After the elastic plate returns to its original position, pull the connecting nozzle out of the acid injection nozzle and activate the electronically controlled lifting block. This will cause the AGM power lead-acid battery under test and the tray to descend, placing them on the scale's pallet. Then, continue to lower the electronically controlled lifting block and separate it from the tray. Read the value displayed on the scale and record it as M1. Finally, activate the electronically controlled lifting block to restore the tray and the AGM power lead-acid battery under test to their original positions.

[0013] Step 5: Open the acid discharge port on the acid return cylinder, take a small amount of acid, measure its density and temperature with a rapid density tester, and convert it to density at Celsius, denoted as p.

[0014] Step 6: Holding the connector, insert the piston cylinder of the connector into the acid injection port on the AGM power lead-acid battery under test, ensuring a sealed connection between the connector and the acid injection port. Slide the sealing sleeve and block the upper port of the air passage. Activate the negative pressure source to create a negative pressure state inside the AGM power lead-acid battery under test, maintaining this state for 5-7 seconds. Operate the solenoid valve to open the acid return pipe, close the acid extraction pipe, and open the balance pipe. Under the negative pressure inside the AGM power lead-acid battery under test, the acid in the acid return cylinder will enter the AGM power lead-acid battery under test through the acid return pipe, connecting pipe, and acid injection pipe. When the acid no longer flows into the AGM power lead-acid battery under test, slowly open the upper port of the air passage by sliding the sealing sleeve.

[0015] Step 7: Operate the solenoid valve, close the balance tube, open the acid extraction tube, and close the acid return tube, so that the sealing sleeve is located above the upper port of the air passage. At this time, the inside and outside of the AGM power lead-acid battery under test are connected through the air passage. The extraction tube extracts air, and the free acid above the AGM separator is drawn into the acid return cylinder under normal pressure.

[0016] Step 8: Activate the electronically controlled lifting block to lower the AGM power lead-acid battery under test and the tray, so that the tray and the AGM power lead-acid battery under test are on the scale's pallet. Then, let the electronically controlled lifting block continue to lower and separate from the tray. Read the value displayed on the scale and record it as M2. Then, activate the electronically controlled lifting block to restore the tray and the AGM power lead-acid battery under test to their original positions.

[0017] Step 9: Calculate the weight saturation. Weight saturation = [G - (M2 - M1)] / G * 100%, where G is the weight of acid in a single cell.

[0018] Step 10: Calculate the volume saturation. Volume saturation = [V - (M2 - M1) / p] / V * 100%, where V is the acid-containing volume of a single cell process.

[0019] Step 11: Determine whether the product is qualified based on the calculated weight saturation and volume saturation.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention, by setting an expandable combined sealing gasket composed of a second airbag and rubber strips on an elastic sheet, can ensure the sealing performance between the connecting nozzle and the acid injection nozzle during the extraction of acid from the AGM power lead-acid battery under test. At the same time, the expanded elastic sheet can prevent the piston cylinder from exiting the acid injection nozzle. The piston cylinder has good stability and sealing performance when inserted into the acid injection nozzle, which can ensure the amount of acid extracted from the AGM power lead-acid battery under test.

[0022] 2. After the second airbag contracts, the elastic sheet can return to its original position. During the process of pulling the connecting nozzle out of the acid injection nozzle, the elastic sheet will not be blocked by the acid injection nozzle, making it convenient to pull the connecting nozzle out of the acid injection nozzle.

[0023] 3. During the connection process between the connecting sleeve and the upper end of the piston cylinder, the rubber ring can compress the first air bladder. After being compressed, the first air bladder expands, which can further seal the piston cylinder and the acid injection nozzle. Attached Figure Description

[0024] Figure 1 This is a front view of the present invention.

[0025] Figure 2 This is a schematic diagram of the connector.

[0026] Figure 3 This is a schematic diagram showing the interaction between the elastic sheet and the second airbag.

[0027] Figure 4 This is a cross-sectional view of the connecting nozzle.

[0028] Figure 5 for Figure 4 A magnified view of region A in the middle.

[0029] Figure 6 for Figure 4 A magnified view of region B in the middle.

[0030] The names of the components in the attached diagram are:

[0031] 1. Testing frame; 2. Fixing plate; 3. Scale; 4. Electrically controlled lifting block; 5. Support plate; 6. AGM power lead-acid battery to be tested; 7. Acid return cylinder; 8. Filter cylinder; 9. Drying cylinder; 10. Vacuum extraction pipe; 11. First connecting pipe; 12. Second connecting pipe; 13. Acid discharge port; 14. Acid return pipe; 15. Acid extraction pipe; 16. Balance pipe; 17. Solenoid valve; 18. Connecting nozzle; 19. Acid injection nozzle; 20. Acid filling pipe; 1. Air passage; 22. Piston cylinder; 23. Baffle; 24. External thread; 25. First airbag; 26. Sliding sleeve; 27. Rubber ring; 28. Arc-shaped surface; 29. ​​Piston ring; 30. Piston sleeve; 31. Connecting sleeve; 32. Internal thread; 33. Sealing sleeve; 34. Elastic sheet; 35. Second airbag; 36. Fixing rod; 37. Gas passage; 38. Hose; 39. Rubber strip; 40. Connecting pipe; 41. Ring groove. Detailed Implementation

[0032] like Figure 1-6 As shown, the AGM power lead-acid battery 6 acid saturation testing device includes a testing frame 1, within which an acid transfer mechanism is installed. A scale 3 is mounted on the testing frame 1 above the acid transfer mechanism. A lifting platform is mounted on the testing frame 1 above the scale 3, and the AGM power lead-acid battery 6 to be tested is positioned on the lifting platform.

[0033] A fixing plate 2 is fixed on the detection frame 1 above the acid transfer mechanism, and the scale 3 is placed on the fixing plate 2.

[0034] The lifting platform includes electrically controlled lifting blocks 4 fixed on both sides of the testing frame 1. The two electrically controlled lifting blocks 4 lift the pallet 5. The pallet 5 can fall onto the tray of the scale 3 and separate from the electrically controlled lifting blocks 4. The AGM power lead-acid battery 6 to be tested is located on the pallet 5.

[0035] The acid transfer mechanism is connected to the connecting pipe 40, and a connecting nozzle 18 is installed on the connecting pipe 40. The connecting nozzle 18 can be sealed and inserted into the acid filling nozzle 19 of the AGM power lead-acid battery 6 to be tested.

[0036] The acid transfer mechanism includes an acid return cylinder 7 for storing acid, with an acid discharge port 13 at its lower end. The acid return cylinder 7 is connected to a filter cylinder 8 via a second connecting pipe 12. The filter cylinder 8 is connected to a drying cylinder 9 via a first connecting pipe 11. The drying cylinder 9 is connected to a vacuum pipe 10. The vacuum pipe 10 is connected to a negative pressure source. The acid return pipe 14, the acid extraction pipe 15, and the balance pipe 16 are connected to the acid return cylinder 7 via a solenoid valve 17. The acid return pipe 14 and the acid extraction pipe 15 are connected to a connecting pipe 40.

[0037] The connector 18 includes an acid-adding tube 20, and a piston cylinder 22 is fixedly fitted onto the outer side of the acid-adding tube 20. An annular groove 41 is formed on the upper outer edge of the piston cylinder 22, and a first airbag 25 is fitted inside the annular groove 41. A compression assembly capable of compressing the first airbag 25 is also fitted inside the annular groove 41. The first airbag 25 is an elastic rubber airbag.

[0038] The compression assembly includes a rubber ring 27 and a sliding sleeve 26 fitted inside the annular groove 41, with the sliding sleeve 26 positioned above the rubber ring 27. The sliding sleeve 26 is fixedly connected to the rubber ring 27. An arc-shaped surface 28 is machined at the lower end of the rubber ring 27. The arc-shaped surface 28 contacts the upper end of the first airbag 25. By machining the arc-shaped surface 28 at the lower end of the rubber ring 27, the first airbag 25 can be prevented from being crushed by the rubber ring 27. Multiple baffles 23 are evenly distributed and fixed within the annular groove 41. A vertical groove corresponding to the baffle 23 is formed on the upper part of the sliding sleeve 26, and the baffle 23 slides in conjunction with the vertical groove.

[0039] A pressurization assembly is provided for the sliding seal connection between the piston cylinder 22 and the acid addition pipe 20.

[0040] The pressurization assembly includes a piston ring 29, which is located in the annular cavity between the acid filling pipe 20 and the piston cylinder 22. The piston ring 29 is slidably and sealingly connected to the piston cylinder 22 and the acid filling pipe 20. A piston sleeve 30 is fixed to the upper end of the piston ring 29, and a connecting sleeve 31 is rotatably connected to the upper end of the piston sleeve 30. The acid filling pipe 20 passes through the piston sleeve 30 and the connecting sleeve 31. An internal thread 32 is machined on the connecting sleeve 31, and an external thread 24 is machined on the upper end of the piston cylinder 22. The connecting sleeve 31 and the piston cylinder 22 can be threadedly connected through the internal thread 32 and the external thread 24, and the sliding sleeve 26 is pressed downward.

[0041] An elastic plate 34 is provided at the lower end of the piston cylinder 22. A rubber strip 39 is fixed to the upper end of the elastic plate 34. A strip-shaped second air bladder 35 is fixedly connected to one side of the elastic plate 34. The second air bladder 35 is an elastic rubber air bladder. The elastic plate 34, the second air bladder 35, and the rubber strip 39 are coiled in a vortex shape and located outside the acid addition tube 20. The second air bladder 35 is located within the vortex-shaped space formed by the coiling of the elastic plate 34. The upper end of the rubber strip 39 is in sliding contact with the lower end of the piston cylinder 22. A fixing rod 36 is fixed to one end of the inner side of the elastic plate 34, and the fixing rod 36 is fixedly connected to the piston cylinder 22.

[0042] The lower end of the piston cylinder 22 is provided with a gas passage 37, which is connected to the second airbag 35 through a hose 38.

[0043] A sealing sleeve 33 is provided on the acid filling pipe 20 above the pressurization assembly. Multiple air passages 21 are opened on the pipe wall of the acid filling pipe 20. The upper and lower ports of the air passages 21 are connected to the space outside the acid filling pipe 20. The upper and lower ports of the air passages 21 are located on the upper and lower sides of the piston cylinder 22, respectively. The sealing sleeve 33 can block the upper port of the air passages 21.

[0044] A method for using an AGM power lead-acid battery acid saturation detection device includes the following steps:

[0045] Step 1: During the post-chemical production stage, the AGM power lead-acid battery 6 to be tested is charged. At this time, there is free acid above the AGM separator.

[0046] Step 2: Connect the suction pipe 10 to the negative pressure source, operate the solenoid valve 17, close the balance pipe 16, open the acid suction pipe 15, and close the acid return pipe 14. Hold the connecting nozzle 18 and insert the piston cylinder 22 of the connecting nozzle 18 into the acid injection nozzle 19 on the AGM power lead-acid battery 6 to be tested, ensuring a sealed connection between the connecting nozzle 18 and the acid injection nozzle 19.

[0047] After the piston cylinder 22 is inserted into the acid injection nozzle 19 of the AGM power lead-acid battery 6 under test, the baffle 23 abuts against the upper end of the acid injection nozzle 19, preventing the piston cylinder 22 and the acid injection tube 20 from moving downwards. Then, the connecting sleeve 31 is pressed down, and the connecting sleeve 31 drives the piston ring 29 downwards through the piston sleeve 30. During the downward movement of the piston ring 29, the gas in the piston cylinder 22 is forced into the second airbag 35 through the gas channel 37 and the hose 38. As the gas in the piston cylinder 22 continuously enters the second airbag 35, the second airbag 35 gradually expands, thereby causing the elastic plate 34 to expand outwards. During the expansion of the second airbag 35, the second airbag 35 can make sealing contact with the rubber strip 39 at the upper end of the elastic plate 34. After the second airbag 35 and the rubber strip 39 make sealing contact, the second airbag 35 and the rubber strip 39 form a combined sealing gasket. As the second airbag 35 continues to expand, the volume of the combined sealing gasket continuously increases. When the combined sealing gasket contacts the lower end of the acid injection nozzle 19, it seals the lower end of the gap between the piston cylinder 22 and the acid injection nozzle 19. At this time, the elastic plate 34 is blocked by the lower end of the acid injection nozzle 19.

[0048] When the connecting sleeve 31 contacts the upper end of the piston cylinder 22, the connecting sleeve 31 is rotated, causing a threaded connection between the connecting sleeve 31 and the upper end of the piston cylinder 22. During the rotation and threaded connection of the connecting sleeve 31 with the piston cylinder 22, the connecting sleeve 31 rotates and moves downwards. This downward rotation of the connecting sleeve 31 pushes the sliding sleeve 26 and the rubber ring 27 downwards. The downward movement of the rubber ring 27 compresses the first airbag 25, causing it to expand. The expanded first airbag 25 then seals the acid injection nozzle 19 and the piston cylinder 22.

[0049] Step 3: Slide the sealing sleeve 33 and use it to block the upper port of the air passage 21. Start the negative pressure source, and the suction pipe 10 begins to evacuate air. The free acid above the separator of the AGM power lead-acid battery 6 under test enters the acid return cylinder 7 through the acid filling pipe 20, the connecting pipe 40, and the acid extraction pipe 15. The air pressure inside the AGM power lead-acid battery 6 under test is at the negative pressure state required by the process. After maintaining this state for 3-5 seconds, slide the sealing sleeve 33 upward to connect the upper port of the air passage 21 with the outside. Air from outside the AGM power lead-acid battery 6 under test will enter the interior of the AGM power lead-acid battery 6 under test through the air passage 21, and the interior of the AGM power lead-acid battery 6 under test will return to normal pressure. This step is repeated 2-3 times.

[0050] Step 4: Rotate the connecting sleeve 31, causing it to separate from the piston cylinder 22 and drive the piston ring 29 upward through the piston sleeve 30. During the upward movement of the piston ring 29, the second air bladder 35 contracts. Simultaneously, the elastic plate 34 returns to its original position. After the elastic plate 34 returns to its original position, pull the connecting nozzle 18 out of the acid injection nozzle 19. Activate the electronically controlled lifting block 4, causing the AGM power lead-acid battery 6 to be tested and the tray 5 to descend, thus placing the tray 5 and the AGM power lead-acid battery 6 on the pallet of the scale 3. Then, continue to lower the electronically controlled lifting block 4 and separate it from the tray 5, reading the value displayed on the scale 3 and recording it as M1. Then, activate the electronically controlled lifting block 4 again, causing the tray 5 and the AGM power lead-acid battery 6 to return to their original positions.

[0051] Step 5: Open the acid outlet 13 on the acid return cylinder 7, take a small amount of acid, measure its density and temperature with a rapid density tester, and convert it to density at degrees Celsius, denoted as p.

[0052] Step 6: Holding the connector 18, insert the piston cylinder 22 of the connector 18 into the acid injection nozzle 19 on the AGM power lead-acid battery 6 under test, ensuring a sealed connection between the connector 18 and the acid injection nozzle 19. Slide the sealing sleeve 33 and block the upper port of the air passage 21. Activate the negative pressure source to create a negative pressure state inside the AGM power lead-acid battery 6 under test, maintaining this state for 5-7 seconds. Operate the solenoid valve 17 to open the acid return pipe 14, close the acid extraction pipe 15, and open the balance pipe 16. Under the negative pressure inside the AGM power lead-acid battery 6 under test, the acid in the acid return cylinder 7 will enter the AGM power lead-acid battery 6 under test through the acid return pipe 14, connecting pipe 40, and acid injection pipe 20. When the acid stops flowing into the AGM power lead-acid battery 6 under test, slowly open the upper port of the air passage 21 by sliding the sealing sleeve 33.

[0053] Step 7: Operate solenoid valve 17, closing balance pipe 16, opening acid extraction pipe 15, and closing acid return pipe 14. This positions sealing sleeve 33 above the upper port of air passage 21. At this time, the inside and outside of the AGM power lead-acid battery 6 under test are connected through air passage 21, and air extraction pipe 10 extracts air, drawing the free acid above the AGM separator into the acid return cylinder 7 under normal pressure.

[0054] Step 8: Activate the electronically controlled lifting block 4 to lower the AGM power lead-acid battery 6 and the tray 5, thereby placing the tray 5 and the AGM power lead-acid battery 6 on the weighing plate 3. Then, continue lowering the electronically controlled lifting block 4 to separate it from the tray 5, and read the value displayed on the weighing plate 3, recording it as M2. Then, activate the electronically controlled lifting block 4 again to restore the tray 5 and the AGM power lead-acid battery 6 to their original positions.

[0055] Step 9: Calculate the weight saturation. Weight saturation = [G - (M2 - M1)] / G * 100%, where G is the weight of acid in a single cell.

[0056] Step 10: Calculate the volume saturation. Volume saturation = [V - (M2 - M1) / p] / V * 100%, where V is the acid-containing volume of a single cell process.

[0057] Step 11: Determine whether the product is qualified based on the calculated weight saturation and volume saturation. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An AGM power lead-acid battery acid saturation testing device, comprising a testing frame (1), an acid transfer mechanism disposed within the testing frame (1), a scale (3) disposed above the acid transfer mechanism on the testing frame (1), a lifting platform disposed above the scale (3) on the testing frame (1), an AGM power lead-acid battery (6) to be tested located on the lifting platform, the acid transfer mechanism being connected to a connecting pipe (40), a connecting nozzle (18) being installed on the connecting pipe (40), the connecting nozzle (18) being capable of being sealed and inserted into the acid injection nozzle (19) of the AGM power lead-acid battery (6) to be tested, characterized in that, The connecting nozzle (18) includes an acid-adding tube (20), a piston cylinder (22) is fixedly fitted on the outside of the acid-adding tube (20), an annular groove (41) is opened on the upper outer edge of the piston cylinder (22), a first air bladder (25) is fitted inside the annular groove (41), and a compression assembly capable of compressing the first air bladder (25) is fitted inside the annular groove (41). A pressurizing assembly is slidably sealed between the piston cylinder (22) and the acid-adding tube (20), and an elastic plate (34) is provided at the lower end of the piston cylinder (22). 4) A rubber strip (39) is fixed at the upper end, and a strip-shaped second air bladder (35) is fixedly connected to one side of the elastic sheet (34). The elastic sheet (34), the second air bladder (35), and the rubber strip (39) are coiled in a vortex shape and located outside the acid addition tube (20). The second air bladder (35) is located in the vortex-shaped space formed by the coiling of the elastic sheet (34). The upper end of the rubber strip (39) slides in contact with the lower end of the piston cylinder (22), and one end of the inner side of the elastic sheet (34) is fixed to the piston cylinder (22). At the lower end, a gas passage (37) is provided at the lower end of the piston cylinder (22), which is connected to the second airbag (35). A sliding sealing sleeve (33) is provided on the acid filling pipe (20) above the pressurization assembly. Multiple air passages (21) are provided on the pipe wall of the acid filling pipe (20). The upper and lower ends of the air passages (21) are connected to the space outside the acid filling pipe (20). The upper and lower ends of the air passages (21) are located on the upper and lower sides of the piston cylinder (22), respectively. The sealing sleeve (33) The port above the air passage (21) can be blocked; a fixed plate (2) is fixed on the detection frame (1) above the acid transfer mechanism, the scale (3) is placed on the fixed plate (2), the lifting platform includes electrically controlled lifting blocks (4) fixed on both sides of the detection frame (1), the two electrically controlled lifting blocks (4) lift the tray (5), the tray (5) can fall onto the tray of the scale (3) and separate from the electrically controlled lifting blocks (4), and the AGM power lead-acid battery (6) to be tested is located on the tray (5).

2. The AGM power lead-acid battery acid saturation detection device according to claim 1, characterized in that, The acid transfer mechanism includes an acid return cylinder (7) for storing acid. The lower end of the acid return cylinder (7) is provided with an acid discharge port (13). The acid return cylinder (7) is connected to the filter cylinder (8) through a second connecting pipe (12). The filter cylinder (8) is connected to the drying cylinder (9) through a first connecting pipe (11). The drying cylinder (9) is connected to the exhaust pipe (10). The exhaust pipe (10) is connected to a negative pressure source. The acid return pipe (14), the acid extraction pipe (15), and the balance pipe (16) are connected to the acid return cylinder (7) through a solenoid valve (17). The acid return pipe (14) and the acid extraction pipe (15) are connected to the connecting pipe (40).

3. The AGM power lead-acid battery acid saturation detection device according to claim 2, characterized in that, The extrusion assembly includes a rubber ring (27) and a sliding sleeve (26) fitted inside the annular groove (41). The sliding sleeve (26) is located above the rubber ring (27) and is fixedly connected to the rubber ring (27). The lower end of the rubber ring (27) is machined with an arc-shaped surface (28), which contacts the upper end of the first airbag (25). Multiple baffles (23) are evenly distributed and fixed in the annular groove (41). The upper part of the sliding sleeve (26) is provided with a vertical groove corresponding to the baffle (23), and the baffle (23) slides in cooperation with the vertical groove.

4. The AGM power lead-acid battery acid saturation detection device according to claim 3, characterized in that, The pressurization assembly includes a piston ring (29), which is located in the annular cavity between the acid filling tube (20) and the piston cylinder (22). The piston ring (29) is slidably sealed to the piston cylinder (22) and the acid filling tube (20). A piston sleeve (30) is fixed to the upper end of the piston ring (29). A connecting sleeve (31) is rotatably connected to the upper end of the piston sleeve (30). The acid filling tube (20) passes through the piston sleeve (30) and the connecting sleeve (31). An internal thread (32) is machined on the connecting sleeve (31). An external thread (24) is machined on the upper end of the piston cylinder (22). The connecting sleeve (31) and the piston cylinder (22) can be threadedly connected by the internal thread (32) and the external thread (24) and squeeze the sliding sleeve (26) downward.

5. The AGM power lead-acid battery acid saturation detection device according to claim 1, characterized in that, Both the first airbag (25) and the second airbag (35) are elastic rubber airbags.

6. The AGM power lead-acid battery acid saturation detection device according to claim 1, characterized in that, A fixing rod (36) is fixed to one end of the inner side of the elastic sheet (34), and the fixing rod (36) is fixedly connected to the piston cylinder (22).

7. The AGM power lead-acid battery acid saturation detection device according to claim 1, characterized in that, The gas channel (37) is connected to the second airbag (35) via a hose (38).

8. The method of using the AGM power lead-acid battery acid saturation detection device according to claim 4, characterized in that, Includes the following steps: Step 1: After the chemical production process, the AGM power lead-acid battery (6) to be tested is charged. At this time, there is free acid above the AGM separator. Step 2: Connect the suction pipe (10) to the negative pressure source, operate the solenoid valve (17), close the balance pipe (16), open the acid suction pipe (15), close the acid return pipe (14), hold the connecting nozzle (18), insert the piston cylinder (22) of the connecting nozzle (18) into the acid injection nozzle (19) on the AGM power lead-acid battery (6) to be tested, and make the connecting nozzle (18) and the acid injection nozzle (19) seal together. After the piston cylinder (22) is inserted into the acid injection nozzle (19) on the AGM power lead-acid battery (6) to be tested, the baffle (23) abuts against the upper end of the acid injection nozzle (19), and the piston cylinder (22) The acid tube (20) should not be moved downwards. Then, press the connecting sleeve (31) downwards. The connecting sleeve (31) drives the piston ring (29) downwards through the piston sleeve (30). During the downward movement of the piston ring (29), the gas in the piston cylinder (22) is forced into the second air bladder (35) through the gas channel (37) and the hose (38). As the gas in the piston cylinder (22) continuously enters the second air bladder (35), the second air bladder (35) gradually expands, thereby causing the elastic plate (34) to expand outwards. During the expansion of the second air bladder (35), the second air bladder (34)... 5) It can make a sealing contact with the rubber strip (39) at the upper end of the elastic sheet (34). After the second airbag (35) and the rubber strip (39) make a sealing contact, the second airbag (35) and the rubber strip (39) form a combined sealing gasket. As the second airbag (35) continues to expand, the volume of the combined sealing gasket continues to increase. When the combined sealing gasket contacts the lower end of the acid injection nozzle (19), the combined sealing gasket can seal the lower end of the gap between the piston cylinder (22) and the acid injection nozzle (19). At this time, the elastic sheet (34) is blocked by the lower end of the acid injection nozzle (19). When the connecting sleeve (31) and the piston cylinder (22) When the upper end contacts, rotate the connecting sleeve (31) so that the connecting sleeve (31) is threadedly connected to the upper end of the piston cylinder (22). During the process of the connecting sleeve (31) rotating and threadedly connected to the piston cylinder (22), the connecting sleeve (31) rotates and moves downward. During the process of the connecting sleeve (31) rotating and moving downward, it will push the sliding sleeve (26) and the rubber ring (27) downward. During the process of the rubber ring (27) moving downward, it can squeeze the first airbag (25). After the first airbag (25) is squeezed, it expands. After the first airbag (25) expands, it can make the acid injection nozzle (19) and the piston cylinder (22) seal and connect. Step 3: Slide the sealing sleeve (33) and use the sealing sleeve (33) to block the upper port of the air passage (21), start the negative pressure source, and start the air extraction pipe (10) to extract air. The free acid above the separator of the AGM power lead-acid battery (6) under test enters the acid return cylinder (7) through the acid addition pipe (20), the connecting pipe (40) and the acid extraction pipe (15). The air pressure inside the AGM power lead-acid battery (6) under test is the negative pressure state required by the process. After maintaining for 3-5 seconds, slide the sealing sleeve (33) upward to connect the upper port of the air passage (21) with the outside. The air outside the AGM power lead-acid battery (6) under test will enter the interior of the AGM power lead-acid battery (6) under test through the air passage (21). The interior of the AGM power lead-acid battery (6) under test returns to normal pressure. This step is performed 2-3 times in total. Step 4: Rotate the connecting sleeve (31) so that the connecting sleeve (31) separates from the piston cylinder (22) and drives the piston ring (29) upward through the piston sleeve (30). During the upward movement of the piston ring (29), the second air bag (35) contracts and the elastic plate (34) returns to its original position. After the elastic plate (34) returns to its original position, pull the connecting nozzle (18) out of the acid injection nozzle (19), start the electronically controlled lifting block (4), so that the AGM power lead-acid battery (6) to be tested and the tray (5) descend, so that the tray (5) and the AGM power lead-acid battery (6) to be tested are placed on the tray of the scale (3). Then, the electronically controlled lifting block (4) continues to descend and separates from the tray (5). Read the value displayed on the scale (3) and record it as M1. Then start the electronically controlled lifting block (4) so ​​that the tray (5) and the AGM power lead-acid battery (6) to be tested return to their original positions. Step 5: Open the acid outlet (13) on the acid return cylinder (7), take a small amount of acid, measure its density and temperature with a rapid density tester, and convert it to the density at degrees Celsius, and record it as p; Step 6: Holding the connector (18), insert the piston cylinder (22) of the connector (18) into the acid injection nozzle (19) on the AGM power lead-acid battery (6) to be tested, and make the connector (18) and the acid injection nozzle (19) seal together. Slide the sealing sleeve (33) and block the upper port of the air passage (21). Start the negative pressure source to make the inside of the AGM power lead-acid battery (6) to be tested negative pressure. Maintain it for 5s-7s. Operate the solenoid valve (17) to return the acid pipe. (14) Open, acid extraction tube (15) close, balance tube (16) open. Under the negative pressure inside the AGM power lead-acid battery (6) to be tested, the acid in the acid return tube (7) will enter the AGM power lead-acid battery (6) to be tested through the acid return tube (14), connecting tube (40) and acid addition tube (20). When the acid no longer flows into the AGM power lead-acid battery (6) to be tested, the sliding sealing sleeve (33) slowly opens the upper port of the air passage (21). Step 7: Operate the solenoid valve (17), close the balance tube (16), open the acid extraction tube (15), and close the acid return tube (14), so that the sealing sleeve (33) is located above the upper port of the air passage (21). At this time, the inside of the AGM power lead-acid battery (6) under test and the outside of the AGM power lead-acid battery (6) under test are connected through the air passage (21). The extraction tube (10) extracts air, and the free acid above the AGM partition is extracted into the acid return cylinder (7) under normal pressure. Step 8: Activate the electronic lifting block (4) to lower the AGM power lead-acid battery (6) and the tray (5) to the bottom, so that the tray (5) and the AGM power lead-acid battery (6) are on the pallet of the scale (3). Then, the electronic lifting block (4) continues to lower and separates from the tray (5). Read the value displayed on the scale (3) and record it as M2. Then activate the electronic lifting block (4) to restore the tray (5) and the AGM power lead-acid battery (6) to the bottom. Step 9: Calculate the weight saturation. Weight saturation = [G - (M2 - M1)] / G * 100%, where G is the weight of acid in a single cell. Step 10: Calculate the volume saturation, volume saturation = [V - (M2 - M1) / p] / V*100%, where V is the acid volume of a single cell process; Step 11: Determine whether the product is qualified based on the calculated weight saturation and volume saturation.

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