Battery opening and closing valve pressure and air tightness test bench

Abstract

The present application discloses a battery opening and closing valve pressure and air tightness test bench, which specifically relates to the technical field of lead-acid battery detection, including a gas tank, a gradient pressure supply device and an air tightness detection device; the gradient pressure supply device includes an air blocking pipe, a connecting pipe, an air inlet pipe, a rotating disk, a blocking column and a step-by-step transmission mechanism for driving the blocking column into the air blocking pipe; the rotating disk is provided with a through groove adapted for the passage of the blocking column, the open end of the air blocking pipe is correspondingly connected to the through groove, and the air blocking pipe is connected to the gas tank; one end of the connecting pipe is connected to the air blocking pipe, and the other end is connected to the through groove on the rotating disk; one end of the air inlet pipe is connected to the connecting pipe, and the other end is connected to the grid of the battery to be tested. By using this test bench, researchers can control the air pressure introduced into the battery, thereby testing the change in valve opening pressure under different pressures according to the standard.

Description

Technical Field

[0001] The present application relates to the technical field of lead-acid battery detection, and in particular to a battery opening and closing valve pressure and air tightness test bench. Background Art

[0002] Valve regulation and airtightness safety are paramount concerns during the design and use of lead-acid batteries. Lead-acid batteries use dilute sulfuric acid as their electrolyte. High temperatures or abnormal charging and discharging can cause internal pressure to build up, allowing sulfuric acid to escape through weak seals in the battery casing. Sulfuric acid is highly irritating and corrosive, and readily soluble in water. It is highly irritating and corrosive to tissues such as skin and mucous membranes, and can be fatal if inhaled or ingested. Therefore, domestic and international standards include battery valve pressure and airtightness testing as essential safety tests.

[0003] The following standards have been established for testing the air tightness and valve opening and closing pressure of lead-acid batteries: GB / T 5008.1-2023, GB / T 19639.1-2014, GSO 34 / 35-2007, and ABNT NBR 15941:2019. In these standards, the air tightness test method involves opening the battery's valve control, injecting or exhausting gas, and observing whether gas leaks from around the battery. The valve opening and closing pressure test method involves drilling holes in each battery grid, sealing them with plugs, and gradually introducing air into each cell. The valve opening pressure is then measured, followed by a gradual reduction in air pressure and the valve closing pressure measured.

[0004] However, the existing equipment has the following defects in implementing the above test process: 1. It is impossible to manually achieve accurate step-by-step reduction of air pressure, and thus it is impossible to accurately explore the relationship between the step-by-step reduction of air pressure, the pressure when the valve is closed, and the number of battery grids. Summary of the Invention

[0005] The present invention provides a battery opening and closing valve pressure and air tightness test bench. By using the test bench, researchers can control the air pressure entering the battery, thereby testing the change of valve opening pressure under different pressures according to standards.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] Battery opening and closing valve pressure and air tightness test bench, including gas tank, gradient pressure supply device and air tightness detection device;

[0008] The gradient pressure supply device includes an air blocking pipe, a connecting pipe, an air intake pipe, a rotating disk, a blocking column and a step-by-step transmission mechanism that drives the blocking column into the air blocking pipe; the rotating disk is provided with a through groove for the blocking column to pass through, the open end of the air blocking pipe is correspondingly connected to the through groove, and the air blocking pipe is connected to the gas tank; one end of the connecting pipe is connected to the air blocking pipe, and the other end is connected to the through groove on the rotating disk; one end of the air intake pipe is connected to the connecting pipe, and the other end is connected to the grid of the battery to be tested.

[0009] The advantage of the gradient pressure device is that it can achieve a fixed frequency to close the gas in the intake pipe corresponding to the battery grid, thereby exploring the changes in the valve opening pressure of the corresponding battery valve control during the pressure gradient reduction process. This allows researchers to evaluate whether the internal pressure changes of the battery and the torque required to open the valve control switch meet the requirements of the standard.

[0010] Preferably, the gradient pressure supply device further comprises a rotating motor, the output end of the rotating motor is fixed to the gas tank, and the gas tank is connected to the rotating disk in synchronous rotation.

[0011] Preferably, the ladder transmission mechanism includes N equally divided transmission components, a carrier plate and a sliding track;

[0012] The N-equally divided transmission assembly is connected to the carrier plate for rotational transmission. The side end of the carrier plate is provided with a supporting protrusion, and the side end of the carrier plate is provided with a vertical groove that is tightly attached to the side end of the blocking column. The supporting protrusion is located below the vertical groove; one end of the sliding track corresponds to the through groove, and the other end corresponds to the sliding end of the blocking column.

[0013] Among them, the advantage of the cascade transmission mechanism is that by periodically closing one of the air intake pipes, the pressure is gradually reduced, thereby achieving a cascade control pressure reduction.

[0014] As a further preferred embodiment, the N-equally divided transmission assembly includes a drive motor, a transmission wheel, a transmission rod and a transmission block;

[0015] The driving motor and the transmission wheel are connected for coaxial rotation via a central axis; the transmission rod is fixed to the central axis, and a guide column is provided at the end of the transmission rod; the transmission block includes a rotating portion that rotates in contact with the side end of the transmission wheel and a sliding groove portion that adapts to the sliding of the guide column, and the transmission block and the carrier are connected for coaxial rotation.

[0016] Among them, the advantage of the N-equally divided transmission assembly is that, according to the number of intake pipes, the corresponding control rotating disk can be rotated once, and the through groove is just adapted to the blocking column sliding into the blocking pipe, thereby cutting off the gas passage on the intake pipe.

[0017] Preferably, the ladder transmission mechanism further comprises a single feeding column assembly, wherein the single feeding column assembly comprises an arc-shaped limit plate, a slide rail frame, an elastic spring and a push rod;

[0018] The arc-shaped limit plate is fixed to the upper end of the slide rail frame, and a gap is formed between the arc-shaped limit plate and the carrier plate to accommodate the passage of a single blocking column; the push rod is slidably installed on the slide rail frame, and a sliding head is provided at the upper end of the push rod, and the sliding head and the slide rail frame are connected by an elastic spring.

[0019] Among them, the advantage of a single column supply assembly is that it can deliver a blocking column to the corresponding air blocking pipe within a frequency, thereby controlling the pressure to decrease in stages.

[0020] Preferably, the air tightness detection device includes an opening and closing valve and a vent pipe, one end of the vent pipe is connected to the gas tank, and the other end is connected to the valve-controlled battery to be tested, and the opening and closing valve is installed on the vent pipe.

[0021] Preferably, the test bench further comprises a shell, wherein a partition plate is provided in the middle of the shell, and holes for the ventilation pipe and the air intake pipe to pass through are respectively provided on the partition plate.

[0022] Preferably, the partition plate and the interior of the shell form a cavity for accommodating the battery to be tested, and a slidable slide plate is provided at the upper end of the cavity.

[0023] Preferably, a fixing plate is provided at the upper end of the shell, and a thermometer and a ruler are installed on the fixing plate.

[0024] Compared with the prior art, the advantages or beneficial effects of the technical solution of this application include:

[0025] 1. In the case of single valve control, a gradient pressure supply device is set up to control the gradient reduction of air delivered to the battery grid of the battery under test. This allows researchers to determine the force required to open the battery valve control when the battery is abnormal and the internal pressure suddenly increases, providing a basis for testing whether the battery meets the standards.

[0026] 2. The internal pressure of the battery to be tested is reduced by controlling the gradient pressure supply device without manual operation, thus avoiding sudden explosion or electrolyte leakage during the battery testing process, which poses a threat to the personal health of scientific researchers.

[0027] 3. In the case of multiple valve controls, a gradient pressure device can be used to control the opening and closing of the intake pipes connected to the individual battery grids under test, allowing the quality of all valve controls to be measured at once. For example, this can be done by examining whether the corresponding valve control can open normally under a specific air pressure in the intake pipe, and whether the activation pressure of the valve control on other battery grids is affected when the air pressure is gradually stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the connection between the gradient pressure supply device, the gas tank and the battery to be tested;

[0029] Figure 2 Schematic diagram of the three-dimensional structure of the gradient pressure supply device;

[0030] Figure 3 Schematic diagram of the three-dimensional structure of the gradient pressure supply device (side view);

[0031] Figure 4 for Figure 3 A magnified view of part A in FIG;

[0032] Figure 5 This is a structural diagram of the battery opening and closing valve pressure and air tightness test bench (showing the internal structure);

[0033] Figure 6 This is a schematic diagram of the overall structure of the battery opening and closing valve pressure and air tightness test bench.

[0034] In the figure: 1. gas tank, 2. air blocking pipe, 4. air inlet pipe, 5. connecting pipe, 6. rotating disk, 7. sliding track, 8. through slot, 9. arc-shaped limit plate, 10. supporting convex portion, 11. upright slot, 12. carrier plate, 14. sliding head, 15. elastic spring, 16. slide rail frame, 17. blocking column, 18. push rod, 19. transmission wheel, 20. guide column, 21. transmission rod, 22. central axis, 23. slide groove portion, 24. transmission block, 25. driving motor, 27. rotating motor, 31. ventilation pipe, 32. battery to be tested, 33. slide plate, 35. hole, 36. shell, 37. fixing plate, 38. thermometer, 39. ruler. DETAILED DESCRIPTION

[0035] The following will describe the implementation methods of this application in detail with reference to the accompanying drawings and examples, so that the application can fully understand how technical means are used to solve technical problems and achieve corresponding technical effects, and implement them accordingly. The embodiments of this application and the various features therein can be combined with each other without conflict, and the resulting technical solutions are all within the scope of protection of this application.

[0036] It should be clear that the embodiments described below are only some of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of this application. Example

[0037] This embodiment describes in detail the scheme of simulating a spawning site:

[0038] like Figures 1-6 , battery opening and closing valve pressure and air tightness test bench, including gas tank 1, gradient pressure supply device and air tightness detection device;

[0039] The gradient pressure supply device includes an air blocking pipe 2, a connecting pipe 5, an air inlet pipe 4, a rotating disk 6, a blocking column 17, and a step-by-step transmission mechanism for driving the blocking column 17 into the air blocking pipe 2. The rotating disk 6 is provided with a through slot 8 adapted to accommodate the passage of the blocking column 17. The open end of the air blocking pipe 2 is correspondingly connected to the through slot 8, and the air blocking pipe 2 is connected to the gas tank 1. One end of the connecting pipe 5 is connected to the air blocking pipe 2, and the other end is connected to the through slot 8 on the rotating disk 6. One end of the air inlet pipe 4 is connected to the connecting pipe 5, and the other end is connected to the grid of the battery to be tested 32. The gradient pressure supply device also includes a rotating motor 27. The output end of the rotating motor 27 is fixed to the gas tank 1, and the gas tank 1 and the rotating disk 6 are connected for synchronous rotation.

[0040] The internal connection relationship and working principle of the gradient pressure supply device are as follows:

[0041] The gas blocking pipe 2, connecting pipe 5, air intake pipe 4, and through-slot 8 are interconnected with the gas tank 1. When the blocking column 17 is driven by the step-by-step transmission mechanism, it passes through the through-slot 8 in sequence until it enters the gas blocking pipe 2, cutting off the gas flow path between the connecting pipe 5 and the gas tank 1. As a result, the air intake pipe 4 no longer supplies air to the connected battery grid under test, effectively stopping the pressure.

[0042] After gradually reducing the pressure entering the battery grid, the researchers explored the torque required to open the valve control according to the requirements of the standard, thereby determining whether the exhaust valves of this batch of batteries can be reliably opened and closed within the pressure range of 0.98kPa to 196kPa.

[0043] The air tightness detection device includes an opening and closing valve and a vent pipe 31 . One end of the vent pipe 31 is connected to the gas tank 1 , and the other end is valve-controlledly connected to the battery to be tested 32 . The opening and closing valve is installed on the vent pipe 31 .

[0044] The opening and closing valve can use a solenoid valve (RSSM / UD-C micro solenoid valve), which controls the valve through electromagnetic action, making it easy to detect personnel and avoid dangerous sources.

[0045] In this embodiment, the test bench further includes a shell 36 , a partition plate is provided in the middle of the shell 36 , and holes 35 are provided on the partition plate for the ventilation pipe 31 and the air intake pipe 4 to pass through respectively.

[0046] In this embodiment, the partition plate and the interior of the housing 36 form a cavity for accommodating the battery under test 32. A slidable slide 33 is provided at the upper end of the cavity. During the airtightness test, after gas is introduced into the valve-controlled line, if the battery housing is not properly sealed, bubbles will be generated in the water tank, which will push slide 33 upward, thereby indicating whether the battery under test meets the airtightness standards.

[0047] In this embodiment, a fixing plate 37 is provided at the upper end of the housing 36 , and a thermometer 38 and a ruler 39 are mounted on the fixing plate 37 . Example

[0048] Based on Example 1, this embodiment further describes the structure of the ladder transmission mechanism in detail:

[0049] The ladder transmission mechanism includes N equally divided transmission components, a carrier plate 12 and a sliding track 7;

[0050] The N-equally divided transmission assembly is connected to the carrier plate 12 for rotational transmission. The side end of the carrier plate 12 is provided with a supporting protrusion 10, and the side end of the carrier plate 12 is provided with a vertical groove 11 that is closely attached to the side end of the blocking column 17. The supporting protrusion 10 is located below the vertical groove 11; one end of the sliding track 7 corresponds to the through groove 8, and the other end corresponds to the sliding end of the blocking column 17.

[0051] The connection relationship and working principle of the internal components of the ladder transmission mechanism are as follows:

[0052] like Figure 3 As shown, when the carrier 12 is periodically driven, the supporting protrusion 10 will push the blocking column 17 upward until it is thrown horizontally. After passing through the sliding track 7, the blocking column 17 passes through the corresponding through slot 8 and slides into the air blocking pipe 2. During the above process, it is necessary to ensure that the driving rotation frequencies of the rotating motor 27 and the driving motor 25 are consistent.

[0053] At the same time, if Figure 4 As shown, the N-equally divided transmission assembly includes a drive motor 25, a transmission wheel 19, a transmission rod 21 and a transmission block 24;

[0054] The driving motor 25 and the transmission wheel 19 are coaxially connected for rotation via the central axis 22; the transmission rod 21 is fixed to the central axis 22, and a guide column 20 is provided at the end of the transmission rod 21; the transmission block 24 includes a rotating portion that rotates in contact with the side end of the transmission wheel 19 and a sliding groove portion 23 that adapts to the sliding of the guide column 20, and the transmission block 24 is coaxially connected for rotation with the carrier plate 12.

[0055] The internal component connection relationship and working principle of the N-equal transmission assembly are as follows:

[0056] See also Figure 4 When the driving motor 25 drives the central shaft 22 to rotate, the transmission wheel 19 and the transmission rod 21 are driven to rotate.

[0057] When the side end of the transmission wheel 19 is engaged with the rotating portion of the transmission block 24, the transmission block 24 is in a stationary state. When the transmission rod 21 is in transmission connection with the slide groove portion 23, the transmission block 24 can be driven to rotate, thereby driving the carrier plate 12 fixed to the transmission block 24 to rotate. Example

[0058] like Figure 3 As shown, this embodiment further describes the structure of the ladder transmission mechanism in detail based on embodiments 1 and 2:

[0059] The step transmission mechanism also includes a single feeding column assembly, which includes an arc-shaped limit plate 9, a slide rail frame 16, an elastic spring 15 and a push rod 18; the arc-shaped limit plate 9 is fixed to the upper end of the slide rail frame 16, and a gap is formed between the arc-shaped limit plate 9 and the carrier plate 12 to accommodate the passage of a single blocking column 17; the push rod 18 is slidably installed on the slide rail frame 16, and a sliding head 14 is provided at the upper end of the push rod 18, and the sliding head 14 and the slide rail frame 16 are connected by an elastic spring 15.

[0060] The advantage of a single column assembly is that each blocking column 17 is pressed together by the elastic force of the elastic spring 15, so that after the previous blocking column 17 is transmitted to the air blocking pipe 2 through the carrier plate 12, the next blocking column 17 is pushed to the next vertical groove 11 on the carrier plate 12, waiting for the next push.

Claims

1. Battery opening and closing valve pressure and air tightness test bench, characterized by: It comprises a gas tank (1), a gradient pressure supply device and an air tightness detection device; The gradient pressure supply device comprises an air blocking pipe (2), a connecting pipe (5), an air inlet pipe (4), a rotating disk (6), a blocking column (17), and a step-by-step transmission mechanism for driving the blocking column (17) into the air blocking pipe (2); The rotating disk (6) is provided with a through slot (8) adapted for the blocking column (17) to pass through, the open end of the gas blocking pipe (2) is correspondingly connected to the through slot (8), and the gas blocking pipe (2) is connected to the gas tank (1); one end of the connecting pipe (5) is connected to the gas blocking pipe (2), and the other end is connected to the through slot (8) on the rotating disk (6); one end of the air inlet pipe (4) is connected to the connecting pipe (5), and the other end is connected to the grid of the battery to be tested (32); The step transmission mechanism comprises an N-equally divided transmission assembly, a carrier plate (12) and a sliding track (7); the N-equally divided transmission assembly and the carrier plate (12) are connected in rotational transmission, the side end of the carrier plate (12) is provided with a supporting protrusion (10), the side end of the carrier plate (12) is provided with a vertical groove (11) closely attached to the side end of the blocking column (17), and the supporting protrusion (10) is located below the vertical groove (11); one end of the sliding track (7) corresponds to the through groove (8), and the other end corresponds to the slide-out end of the blocking column (17); The step transmission mechanism also includes a single feeding column assembly, which includes an arc-shaped limit plate (9), a slide rail frame (16), an elastic spring (15) and a push rod (18); the arc-shaped limit plate (9) is fixed to the upper end of the slide rail frame (16), and a gap is formed between the arc-shaped limit plate (9) and the carrier (12) to accommodate the passage of a single blocking column (17); the push rod (18) is slidably mounted on the slide rail frame (16), and a sliding head (14) is provided at the upper end of the push rod (18), and the sliding head (14) and the slide rail frame (16) are connected via an elastic spring (15); The N-equally divided transmission assembly includes a drive motor (25), a transmission wheel (19), a transmission rod (21) and a transmission block (24); The driving motor (25) and the transmission wheel (19) are connected to each other in a coaxial rotation manner via a central shaft (22); The transmission rod (21) and the central shaft (22) are fixed, and a guide column (20) is provided at the end of the transmission rod (21); the transmission block (24) includes a rotating portion that rotates in contact with the side end of the transmission wheel (19) and a sliding groove portion (23) that slides with the guide column (20), and the transmission block (24) and the carrier plate (12) are coaxially connected.

2. The battery opening and closing valve pressure and air tightness test bench according to claim 1 is characterized in that: The gradient pressure supply device further comprises a rotating motor (27), the output end of the rotating motor (27) is fixed to the gas tank (1), and the gas tank (1) and the rotating disk (6) are connected in synchronous rotation.

3. The battery opening and closing valve pressure and airtightness test bench according to claim 1 is characterized in that: The air tightness detection device comprises an opening and closing valve and a vent pipe (31), one end of the vent pipe (31) is connected to the gas tank (1), and the other end is connected to the battery to be tested (32) in a valve-controlled manner, and the opening and closing valve is installed on the vent pipe (31).

4. The battery opening and closing valve pressure and air tightness test bench according to claim 3 is characterized in that: It also includes a shell (36), wherein a partition plate is provided in the middle of the shell (36), and holes (35) are provided on the partition plate for respectively adapting the vent pipe (31) and the air inlet pipe (4) to pass through.

5. The battery opening and closing valve pressure and air tightness test bench according to claim 4 is characterized in that: The partition plate and the interior of the housing (36) form a cavity for accommodating the battery to be tested (32), and a slidable slide plate (33) is provided at the upper end of the cavity.

6. The battery opening and closing valve pressure and air tightness test bench according to claim 4 is characterized in that: A fixing plate (37) is provided at the upper end of the housing (36), and a thermometer (38) and a measuring ruler (39) are mounted on the fixing plate (37).

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