Storage battery on-off valve pressure and air tightness test bench

Abstract

The invention discloses a storage battery on-off valve pressure and air tightness test bed, and particularly relates to the technical field of lead-acid storage battery detection, which comprises a gas tank, a gradient pressure supply device and an air tightness detection device, the gradient pressure supply device comprises an air blocking pipe, a connecting pipe, an air inlet pipe, a rotating disc, a blocking column and an echelon transmission mechanism for driving the blocking column to enter the air blocking pipe; a through groove allowing the plugging column to pass through is formed in the rotating disc, the opening end of the gas plugging pipe is correspondingly communicated with the through groove, and the gas plugging pipe is communicated with the gas tank; one end of the connecting pipe communicates with the air blocking pipe, and the other end of the connecting pipe communicates with the through groove in the rotating disc; one end of the air inlet pipe is communicated with the connecting pipe, and the other end is communicated with a to-be-tested storage battery grid. By using the test bench, scientific researchers can conveniently control the pressure of air introduced into the storage battery, so that the change of valve opening pressure under different pressures can be tested 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 control and airtightness safety are the most concerned issues in the design and use of lead-acid batteries. Lead-acid batteries use dilute sulfuric acid as the electrolyte. High temperature or abnormal charging and discharging can cause the internal pressure of the battery to increase, and sulfuric acid will overflow along with the gas along the weak sealing of the shell. Since sulfuric acid has strong irritation and corrosion effects and is easily soluble in water, it has strong irritation and corrosion effects on tissues such as skin and mucous membranes, and inhalation or ingestion may be fatal. Therefore, in the formulation of domestic and international standards, the opening and closing valve pressure and airtightness test of the battery are listed as basic mandatory safety items.

[0003] The following standards have been formulated for the air tightness and valve opening and closing pressure tests of lead-acid batteries: GB / T 5008.1-2023, GB / T 19639.1-2014, GSO 34 / 35-2007 and ABNT NBR 15941:2019. In the above standards, the test method for air tightness is: open the battery's own valve control, inject or discharge gas, and observe whether there is gas overflow around the battery. The method for the valve opening and closing pressure test is: punch a hole in each grid of the battery, seal it with a plug, gradually flush air into each single battery, measure the valve opening pressure, then gradually reduce the air pressure, and measure the pressure when the valve is closed.

[0004] However, the existing equipment has the following defects in the implementation of the above test process: 1. It is impossible to manually accurately reduce the air pressure in stages, and thus it is impossible to accurately explore the relationship between the gradually reduced 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, scientific researchers can control the air pressure entering the battery, thereby testing the change of the opening valve pressure under different pressures according to standards.

[0006] The objective of the present invention is achieved through the following technical solutions: Battery opening and closing valve pressure and air tightness test bench, including gas tank, gradient pressure supply device and air tightness detection device; 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 to enter the air blocking pipe; the rotating disk is provided with a through groove adapted to allow 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.

[0007] The advantage of the gradient pressure device is that it can close the gas in the intake pipe corresponding to the battery grid at a fixed frequency, so as to explore the change of the valve opening pressure on the valve control of the battery to be tested during the pressure gradient reduction process. This allows researchers to evaluate whether the internal pressure change of the battery and the torque required to open the valve control switch meet the requirements of the standard.

[0008] 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.

[0009] Preferably, the step transmission mechanism comprises N equally divided transmission components, a carrier plate and a sliding track; The N-equally divided transmission assembly is connected to the carrier plate for rotation transmission. The side end of the carrier plate is provided with a supporting convex portion, and the side end of the carrier plate is provided with a vertical groove that is closely attached to the side end of the blocking column, and the supporting convex portion is located below the vertical groove; one end of the sliding track corresponds to the through groove, and the other end corresponds to the slide-out end of the blocking column.

[0010] Among them, the advantage of the step-by-step transmission mechanism is that by periodically closing one of the air intake pipes, the pressure is gradually reduced, thereby achieving a step-by-step control pressure reduction.

[0011] As a further preferred embodiment, the N-equally divided transmission assembly includes a driving motor, a transmission wheel, a transmission rod and a transmission block; 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 is connected for coaxial rotation with the carrier plate.

[0012] Among them, the advantage of the N-divided transmission assembly is that, according to the number of intake pipes, after the corresponding control rotating disk rotates once, the through groove just fits the blocking column to slide into the blocking pipe, thereby cutting off the gas passage on the intake pipe.

[0013] Preferably, the step 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; 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.

[0014] 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 be reduced in stages.

[0015] Preferably, the air tightness detection device comprises 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 vent pipe of the battery to be tested, and the opening and closing valve is installed on the vent pipe.

[0016] Preferably, the test bench further comprises a shell, a partition plate is provided in the middle of the shell, and holes for adapting the ventilation pipe and the air intake pipe to pass through are respectively provided on the partition plate.

[0017] 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.

[0018] Preferably, a fixing plate is provided at the upper end of the shell, and a thermometer and a ruler are mounted on the fixing plate.

[0019] Compared with the prior art, the advantages or beneficial effects of the technical solution of the present application include: 1. In the case of single valve control, the gradient pressure supply device is set to control the gradient reduction of air delivered to the battery grid of the battery to be tested. This makes it easier for researchers to find out how much force is needed to open the battery valve control when the battery is abnormal and the internal pressure increases suddenly, providing a basis for testing whether the battery meets the standards.

[0020] 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.

[0021] 3. In the case of multiple valve controls, the gradient pressure device is used to control the opening and closing of the intake pipes connected to the individual battery grids to be tested, so that the quality of all valve controls can be measured at one time. For example, it is possible to explore whether the corresponding valve control can be opened normally when a specific air pressure is introduced into the intake pipe, and whether the activation pressure of the valve control on other battery grids is affected when the air pressure on the battery grid to be tested is stopped one after another. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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; Figure 2It is a schematic diagram of the three-dimensional structure of the gradient pressure supply device; Figure 3 It is a schematic diagram of the three-dimensional structure of the gradient pressure supply device (side view); Figure 4 for Figure 3 A magnified view of part A in FIG. Figure 5 This is a schematic diagram of the structure of the battery opening and closing valve pressure and air tightness test bench (showing the internal structure); Figure 6 This is a schematic diagram of the overall structure of the battery opening and closing valve pressure and air tightness test bench.

[0023] In the figure: 1, gas tank, 2, blocking pipe, 4, air inlet pipe, 5, connecting pipe, 6, rotating disk, 7, sliding track, 8, through groove, 9, arc limit plate, 10, supporting convex part, 11, upright groove, 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, middle shaft, 23, slide groove part, 24, transmission block, 25, drive 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

[0024] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present application applies technical means to solve technical problems and achieve corresponding technical effects can be fully understood and implemented accordingly. The embodiments of the present application and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the protection scope of the present application.

[0025] It should be clear that the embodiments described below are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by technicians in the relevant field without making creative work are within the scope of protection of the present application. Example

[0026] This embodiment describes in detail the scheme of simulating a spawning site: like Figure 1-Figure 6 , a battery opening and closing valve pressure and air tightness test bench, including a gas tank 1, a gradient pressure supply device and an air tightness detection device; The gradient pressure supply device includes a gas blocking pipe 2, a connecting pipe 5, an air inlet pipe 4, a rotating disk 6, a blocking column 17, and a step transmission mechanism for driving the blocking column 17 into the gas blocking pipe 2; the rotating disk 6 is provided with a through slot 8 adapted to fit the blocking column 17, 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 32 to be tested. 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 is connected to the rotating disk 6 for synchronous rotation.

[0027] The internal connection relationship and working principle of the gradient pressure supply device are as follows: The blocking pipe 2, the connecting pipe 5, the air inlet pipe 4, the through groove 8 and the gas tank 1 are interconnected. When the blocking column 17 is driven by the step transmission mechanism, it passes through the through groove 8 in sequence until it enters the blocking pipe 2, and cuts off the gas flow channel between the connecting pipe 5 and the gas tank 1, so that the air inlet pipe 4 no longer delivers air to the battery grid to be tested connected thereto, that is, stops applying pressure.

[0028] After successively 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~196kPa.

[0029] 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 , and the opening and closing valve is installed on the vent pipe 31 .

[0030] 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 for detection personnel to avoid dangerous sources.

[0031] In this embodiment, the test bench further comprises a shell 36 , a partition plate is provided in the middle of the shell 36 , and holes 35 for the ventilation pipe 31 and the air intake pipe 4 to pass through are respectively provided on the partition plate.

[0032] In this embodiment, the partition plate and the interior of the shell 36 enclose 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. In the airtightness test, after the gas is introduced into the valve-controlled pipeline, if the battery shell is not well sealed, bubbles will be generated in the water tank, and the slide plate 33 will be pushed upward, so as to indicate whether the airtightness of the battery to be tested meets the standard.

[0033] In this embodiment, a fixing plate 37 is provided at the upper end of the shell 36 , and a thermometer 38 and a ruler 39 are installed on the fixing plate 37 . Example

[0034] Based on Example 1, this embodiment further describes the structure of the ladder transmission mechanism in detail: The step transmission mechanism includes N equally divided transmission components, a carrier plate 12 and a sliding track 7; 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 which is 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 sliding out end of the blocking column 17.

[0035] The connection relationship and working principle of the internal components of the ladder transmission mechanism are as follows: 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 out horizontally, and the blocking column 17 passes through the sliding track 7 and the corresponding through slot 8, thereby sliding into the air blocking pipe 2. In the above process, it should be ensured that the driving rotation frequency between the rotating motor 27 and the driving motor 25 is consistent.

[0036] At the same time, if Figure 4 As shown, the N-equally divided transmission assembly includes a driving 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 coaxially connected for rotation via the central axis 22; the transmission rod 21 and the central axis 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 adapts to the sliding of the guide column 20, and the transmission block 24 is coaxially connected for rotation with the carrier plate 12.

[0037] The internal component connection relationship and working principle of the N-equal transmission assembly are as follows: See also Figure 4 When the driving motor 25 drives the central shaft 22 to rotate, the driving wheel 19 and the driving rod 21 are driven to rotate.

[0038] When the side end of the transmission wheel 19 fits with the rotating part of the transmission block 24, the transmission block 24 is in a stationary state, and when the transmission rod 21 is in transmission connection with the slide groove part 23, the transmission block 24 can be driven to rotate, thereby driving the carrier 12 fixed to the transmission block 24 to rotate. Example

[0039] like Figure 3As shown, this embodiment further describes the structure of the ladder transmission mechanism in detail based on embodiments 1 and 2: 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.

[0040] 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) to enter the air blocking pipe (2); The rotating disk (6) is provided with a through groove (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 groove (8), and the gas blocking pipe (2) is connected to the gas tank (1); One end of the connecting pipe (5) is in communication with the air blocking pipe (2), and the other end is in communication with the through groove (8) on the rotating disk (6); One end of the air intake 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).

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 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 in synchronous rotation.

3. The battery opening and closing valve pressure and air tightness test bench according to claim 1, characterized in that: The step transmission mechanism comprises N equally divided transmission components, a carrier plate (12) and a sliding track (7); The N-equally divided transmission assembly is connected to the carrier plate (12) in a rotational transmission manner, 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) which is 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 slot (8), and the other end corresponds to the sliding-out end of the blocking column (17).

4. The battery opening and closing valve pressure and air tightness test bench according to claim 3 is characterized in that: The N-equally divided transmission assembly comprises a driving 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 coaxially rotatably connected 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) comprises a rotating portion that rotates in contact with the side end of the transmission wheel (19) and a sliding groove portion (23) that is adapted to slide with the guide column (20), and the transmission block (24) and the carrier plate (12) are coaxially connected for rotation.

5. The battery opening and closing valve pressure and air tightness test bench according to claim 3 is characterized in that: 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 mounted on the slide rail frame (16); 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).

6. The battery opening and closing valve pressure and air tightness test bench according to claim 1, 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 storage battery (32) to be tested in a valve-controlled manner, and the opening and closing valve is mounted on the vent pipe (31).

7. The battery opening and closing valve pressure and air tightness test bench according to claim 1, characterized in that: It also comprises a shell (36), wherein a partition plate is provided in the middle of the shell (36), and holes (35) are respectively provided on the partition plate for the ventilation pipe (31) and the air intake pipe (4) to pass through.

8. The battery opening and closing valve pressure and air tightness test bench according to claim 7, characterized in that: The partition plate and the interior of the housing (36) form a cavity for accommodating the storage battery (32) to be tested, and a slidable slide plate (33) is provided at the upper end of the cavity.

9. The battery opening and closing valve pressure and air tightness test bench according to claim 7, 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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