Automatic acid adding device for secondary acid adding of lead storage battery

Abstract

The utility model provides a kind of automatic acid adding device used when lead accumulator secondary adds acid, and the device includes support frame, positioning mechanism, acid liquid reservoir, acid liquid flow meter, sealing gasket and first driving mechanism. When lead accumulator needs to be secondly added acid, the automatic quantitative acid adding of lead accumulator can be realized, the acid adding positioning is accurate, the acid adding process is smooth, and the acid liquid is not splashed, to ensure the acid consistency of each single cell.

Description

Technical Field

[0001] This utility model belongs to the field of lead-acid battery technology, specifically relating to an automatic acid-adding device used during the secondary acid-adding process of a lead-acid battery. Background Technology

[0002] The acid-adding process for dual-flush lead-acid batteries is crucial and extremely difficult to control, especially when production volumes are high and tasks are heavy. The high ambient and raw material temperatures in each process make control challenging, leading to issues such as high temperatures in semi-finished batteries, high ambient temperatures during acid addition, and high internal temperatures of the electrode groups after acid addition. If the acid temperature and vacuum control are not adequately managed, it will severely impact the battery's low-temperature discharge performance and cycle life.

[0003] When acid is added to a lead-acid battery, the sulfuric acid reacts with lead to generate a large amount of heat, causing the internal temperature of the lead-acid battery to rise. Excessive temperature can affect the performance of the active materials on the plates. Therefore, in the existing technology, a cooling device is added to the acid adding equipment to lower the temperature of the acid solution before adding acid. In this way, even if the reaction generates heat, the internal temperature of the lead-acid battery can be controlled within a low range.

[0004] In existing technologies, one-time acid addition is generally used. However, existing battery acid addition methods and acid cooling equipment suffer from high production volumes and relatively low acid temperature control (acid temperature range of -7℃ to -10℃), resulting in high equipment and energy costs. Furthermore, inaccurate acid addition positioning can cause air leakage due to misalignment between the acid addition mold head and the acid addition hole in the acid pot, preventing acid from being added and leading to acid shortage.

[0005] For example, patent application CN117578045A discloses a method for adding acid to a lead-acid battery, including the following steps: (1) pre-cooling the lead-acid battery to be acid-added, with the temperature of the pre-cooled lead-acid battery to be acid-added being 17-19°C, and (2) pre-cooling the acid solution to be added, with the temperature of the pre-cooled acid solution being -5 to -4°C. In this prior art, by simultaneously pre-cooling the lead-acid battery to be acid-added, the temperature of the subsequently added acid solution can be appropriately increased.

[0006] Existing technologies also involve adding acid in multiple stages to reduce the temperature rise during the acid addition process.

[0007] For example, patent application CN116995377A discloses a method for adding acid and forming a lead-acid battery, including the following steps: (1) First acid addition: a low specific gravity sulfuric acid solution with a density of 1.05-1.20 g / cm3 is added to the lead-acid battery to be acidified using a vacuum negative pressure method, and the added volume is 100%-110% of the saturated acid absorption capacity of the lead-acid battery; (2) After standing for 5 to 25 minutes, a vacuum negative pressure is applied and maintained for 0.5 to 2 minutes. After releasing the negative pressure, a second acid addition is performed, adding a high specific gravity sulfuric acid solution with a density of 1.35-1.55 g / cm3, and adding the remaining volume of the total acid addition using a normal pressure injection method; (3) The battery is placed in a circulating water bath to start the formation process. In this prior art, the acid is added twice. The density of the acid added in the first addition is lower, so the heat released in the reaction is less. Combined with the vacuum negative pressure method, the problem of excessive temperature is solved. However, setting up two different densities of acid requires two sets of acid storage and delivery pipelines, which increases equipment investment costs to some extent. Furthermore, the second addition of acid may result in uneven acid density. Utility Model Content

[0008] To address the aforementioned technical problems in the existing technology, this utility model provides an automatic acid-adding device for secondary acid addition of lead-acid batteries.

[0009] This utility model provides an automatic acid-adding device for secondary acid addition in lead-acid batteries, the automatic acid-adding device comprising:

[0010] A support frame is provided on the cooling water tank, and the cooling water tank serves as an acid-adding work position at the support frame;

[0011] A positioning mechanism, located on the support frame, is used to position the lead-acid battery to be acidified for the second time below the automatic acid-adding device.

[0012] An acid storage tank is provided on the support frame. The number of acid storage tanks is the same as the total number of cells of the lead-acid battery that are being added to simultaneously. Each acid storage tank is used to store the electrolyte of one cell of the lead-acid battery to be added. The top of the acid storage tank is connected to an acid inlet pipe and an air pipe, and the bottom is connected to an acid outlet hose. The air pipe is used to connect to a vacuum pump.

[0013] An acid flow meter, installed on the acid inlet pipe, is used to control the amount of electrolyte added to the acid storage tank each time.

[0014] The sealing gasket is provided with a connector for engaging with the acid injection hole column on the top surface of the lead-acid battery. The number of connectors is the same as the number of acid outlet hoses, and one connector is connected to one end of each acid outlet hose.

[0015] The first drive mechanism, located on the support frame, is used to drive the sealing gasket plate to rise and fall.

[0016] Furthermore, the positioning mechanism includes two sets located on the front and rear sides of the acid addition work station, respectively. Each set of positioning mechanisms includes a first stop and a second stop. The second stop includes two baffles, which are connected to the lower part of the first stop in a hinge structure. The positioning mechanism also includes a second drive mechanism mounted on the support frame for driving the first stop to rise and fall.

[0017] Furthermore, both baffles are equipped with rollers at their bottom that allow them to roll when in contact with the cooling water tank.

[0018] Furthermore, each lead-acid battery has a set of connectors, and the sealing gasket includes multiple pieces, with each sealing gasket having a set of connectors.

[0019] Furthermore, the bottom surface of the sealing gasket is provided with a positioning groove for engaging with the top of the lead-acid battery, and each connector passes through the sealing gasket with its bottom protruding from the bottom surface of the positioning groove.

[0020] Furthermore, a lifting plate driven to move up and down by the first driving mechanism is provided above the sealing gasket plate. A plurality of fixing rods are provided on the sealing gasket plate. The top of the fixing rod passes through the lifting plate, and the extended part has a limiting cap to prevent the fixing rod from falling off the lifting plate. A spring is sleeved on the part of the fixing rod between the sealing gasket plate and the lifting plate.

[0021] Furthermore, the first drive mechanism includes a first cylinder, and the second drive mechanism includes a second cylinder and a guide column for guiding the lifting and lowering of the first stop.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The automatic acid-adding device for secondary acid addition of lead-acid batteries provided by this utility model can automatically add acid quantitatively when the lead-acid battery needs to be added for the second time. The acid-adding positioning is accurate, the acid-adding process is stable, the acid does not splash out, and the acid content of each cell is consistent. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the automatic acid-adding device installed on the cooling water tank in Example 1.

[0025] Figure 2 This is a three-dimensional structural diagram of the automatic acid addition device in Example 1.

[0026] Figure 3 This is a front view schematic diagram of the automatic acid addition device in Example 1.

[0027] Figure 4 This is a schematic diagram of the pipeline connection of the automatic acid addition device in Example 1.

[0028] Figure 5 This is a schematic diagram of the structure of the first and second blocks in Example 1.

[0029] Figure 6 This is a three-dimensional structural diagram of the sealing gasket and lifting plate in Example 1.

[0030] Figure 7 This is a three-dimensional structural diagram of the sealing gasket and lifting plate from another perspective in Example 1.

[0031] Figure 8 This is a front view schematic diagram of the sealing gasket and lifting plate in Example 1.

[0032] Figure label:

[0033] 1. Support frame; 2. Cooling water tank; 3. Positioning mechanism; 4. First stop block; 5. Second stop block; 6. Roller; 7. First drive mechanism; 8. First cylinder; 9. Second drive mechanism; 10. Second cylinder; 11. Guide column; 12. Acid storage tank; 13. Acid inlet pipe; 14. Air pipe; 15. Acid outlet hose; 16. Acid flow meter; 17. Sealing gasket; 18. Connector; 19. Positioning groove; 20. Fixing rod; 19. Spring; 20. Lifting plate; 31. Acid filling pot; 42. Detailed Implementation

[0034] like Figures 1-8 As shown, this embodiment provides an automatic acid-adding device for secondary acid addition of lead-acid batteries. The device includes a support frame 1, a positioning mechanism 3, an acid reservoir 4, an acid flow meter 5, a sealing gasket 6, and a first drive mechanism 34.

[0035] The support frame 1 is mounted on the cooling water tank 2, and the cooling water tank 2 serves as the acid addition work position at the support frame 1.

[0036] The first drive mechanism 34 is mounted on the support frame 1 and includes a first cylinder 35 for driving the sealing gasket 6 to rise and fall.

[0037] The positioning mechanism 3 is mounted on the support frame 1 and is used to position the lead-acid battery to be added acid for the second time below the automatic acid adding device. The positioning mechanism 3 includes two sets located on the front and rear sides of the acid adding work position, respectively. Each set of positioning mechanisms 3 includes a first stop 31, a second stop 32, and a second drive mechanism 36 mounted on the support frame 1 for driving the first stop 31 to rise and fall.

[0038] The second stop 32 includes two baffles, which are hinged to the bottom of the first stop 31. Both baffles have rollers 33 at their bottoms that allow them to roll when in contact with the cooling water tank 2.

[0039] The second drive mechanism 36 includes a second cylinder 37 and a guide column 38 for guiding the lifting and lowering of the first stop 31.

[0040] In use, when the lead-acid battery to be added to the production line reaches below the automatic acid adding device, the second drive mechanism 36 controls the first stop 31 to descend. After the two baffles of the second stop 32 contact the cooling water tank 2, they open to both sides under the drive of the roller 33 until the first stop 31 contacts the cooling water tank 2. The two baffles of the second stop 32 are then placed flat on the cooling water tank 2. The second stop near the downstream of the production line pushes the lead-acid battery directly below the automatic acid adding device, so that the acid outlet position of the automatic acid adding device corresponds to the acid filling hole position of the lead-acid battery. The second stop near the upstream of the production line blocks subsequent lead-acid batteries from coming over.

[0041] The acid storage tank 4 is mounted on the support frame 1. The number of acid storage tanks 4 is the same as the total number of cells of the lead-acid battery that are being added to simultaneously. Each acid storage tank 4 is used to store the electrolyte of one cell of the lead-acid battery to be added. The top of the acid storage tank 4 is connected to an acid inlet pipe 41 and an air pipe 42, and the bottom is connected to an acid outlet hose 43. The air pipe 42 is used to connect to a vacuum pump.

[0042] An acid flow meter 5 is installed on the acid inlet pipe 41 to control the amount of electrolyte added to the acid storage tank 4 each time.

[0043] The sealing gasket 6 is provided with a connector 61 for engaging with the acid injection hole on the top surface of the lead-acid battery. The connector 61 is preferably a rubber tube, and the number of connectors 61 is the same as the number of acid outlet hoses 43, with one connector 61 connected to one end of each acid outlet hose 43. Each set of connectors 61 corresponds to one lead-acid battery, and the sealing gasket 6 includes multiple gaskets, each with a set of connectors 61.

[0044] The bottom surface of the sealing gasket 6 is provided with a positioning groove 62 for mating with the top of the lead-acid battery. Each connector 61 passes through the sealing gasket 6 and the bottom of the connector 61 protrudes from the bottom surface of the positioning groove 62. The protruding part mates with the acid injection hole column to ensure good sealing.

[0045] Above the sealing gasket 6 is a lifting plate 7 driven to rise and fall by a first drive mechanism 34. The sealing gasket 6 has several fixing rods 63, the tops of which pass through the lifting plate 7, and the extended portions have limit caps to prevent the fixing rods 63 from falling off the lifting plate 7. A spring 64 is fitted onto the portion of the fixing rod 63 between the sealing gasket 6 and the lifting plate 7. The spring 64 provides a cushioning effect when the sealing gasket 6 is pressed down onto the top surface of the lead-acid battery. Furthermore, the spring 64 is pre-compressed and mounted on the fixing rods 63, applying a continuous and constant elastic force to the sealing gasket 6. This ensures that the sealing gasket 6 fits tightly and evenly against the sealing surface, maintaining sufficient and relatively constant sealing contact pressure even in the face of minor unevenness, thermal deformation, or small fluctuations in driving force.

[0046] To ensure a more stable addition of electrolyte to the lead-acid battery, an acid-adding device (e.g., 8) can be used. Figures 1-4 As shown, the acid filling pot 8 is placed on the lead-acid battery. The bottom of the acid filling pot 8 is provided with a connecting part for cooperating with the acid injection hole column on the top surface of the lead-acid battery. The acid outlet hose 43 is connected to the acid filling pot 8. The funnel structure of the acid filling pot 8 can receive the electrolyte initially flowing out of the acid outlet hose 43, avoiding the electrolyte directly impacting the inside of the lead-acid battery.

[0047] Work process:

[0048] (1) Let the lead-acid battery to be added acid for the second time enter the cooling water tank along the production line. When the lead-acid battery reaches the acid adding working position, the second drive mechanism controls the first and second blocks on both sides of the lead-acid battery to descend. The rollers under the two second blocks contact the bottom of the cooling water tank, causing the rollers to rub and roll. The second block near the downstream of the production line pushes the lead-acid battery directly under the automatic acid adding device.

[0049] (2) The first drive mechanism controls the lifting plate and the sealing gasket to descend, and the sealing gasket contacts the upper surface of the acid adding pot and presses down to seal with the upper surface of the acid adding pot.

[0050] (3) Add sulfuric acid solution to the acid storage tank by controlling the acid flow meter, and evacuate the inside of the lead-acid battery by using a vacuum pump to add the sulfuric acid solution in the acid storage tank to the lead-acid battery.

[0051] (4) Evacuate the inside of the lead-acid battery for 16 seconds, and then put air into the lead-acid battery for 12 seconds. Repeat this vacuuming and air-releasing cycle 3 times to make the sulfuric acid solution added the second time mix evenly with the sulfuric acid solution inside the electrode group.

Claims

1. An automatic acid-adding device for secondary acid adding of lead-acid batteries, characterized in that, include: A support frame is provided on the cooling water tank, and the cooling water tank serves as an acid-adding work position at the support frame; A positioning mechanism, located on the support frame, is used to position the lead-acid battery to be acidified for the second time below the automatic acid-adding device. An acid storage tank is provided on the support frame. The number of acid storage tanks is the same as the total number of cells of the lead-acid battery that are being added to simultaneously. Each acid storage tank is used to store the electrolyte of one cell of the lead-acid battery to be added. The top of the acid storage tank is connected to an acid inlet pipe and an air pipe, and the bottom is connected to an acid outlet hose. The air pipe is used to connect to a vacuum pump. An acid flow meter, installed on the acid inlet pipe, is used to control the amount of electrolyte added to the acid storage tank each time. The sealing gasket is provided with a connector for engaging with the acid injection hole column on the top surface of the lead-acid battery. The number of connectors is the same as the number of acid outlet hoses, and one connector is connected to one end of each acid outlet hose. The first drive mechanism, located on the support frame, is used to drive the sealing gasket plate to rise and fall.

2. The automatic acid-adding device used for secondary acid adding of lead-acid batteries according to claim 1, characterized in that, The positioning mechanism includes two sets located on the front and rear sides of the acid addition work station, and each set of positioning mechanisms includes a first stop and a second stop. The second stop includes two baffles, which are connected to the bottom of the first stop in a hinge structure. The positioning mechanism also includes a second drive mechanism mounted on the support frame for driving the first stop block to rise and fall.

3. The automatic acid-adding device used for secondary acid adding of lead-acid batteries according to claim 2, characterized in that, Both baffles are equipped with rollers at the bottom that allow them to roll when in contact with the cooling water tank.

4. The automatic acid-adding device used for secondary acid adding of lead-acid batteries according to claim 1, characterized in that, Each lead-acid battery has a set of connectors, and the sealing gasket includes multiple pieces, with each sealing gasket having a set of connectors.

5. The automatic acid-adding device used for secondary acid adding of lead-acid batteries according to claim 1, characterized in that, The bottom surface of the sealing gasket is provided with a positioning groove for mating with the top of the lead-acid battery. Each connector passes through the sealing gasket and the bottom of the connector protrudes from the bottom surface of the positioning groove.

6. The automatic acid-adding device used for secondary acid adding of lead-acid batteries according to claim 1, characterized in that, Above the sealing gasket is a lifting plate driven to move up and down by the first driving mechanism. The sealing gasket is provided with a plurality of fixing rods. The top of the fixing rod passes through the lifting plate, and the extended part has a limiting cap to prevent the fixing rod from falling off the lifting plate. A spring is sleeved on the part of the fixing rod between the sealing gasket and the lifting plate.

7. The automatic acid-adding device used for secondary acid adding of lead-acid batteries according to claim 2, characterized in that, The first drive mechanism includes a first cylinder, and the second drive mechanism includes a second cylinder and a guide column for guiding the lifting and lowering of the first stop.

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