Device and method for detecting water content of lead plaster

Abstract

The invention relates to the technical field of storage battery material detection, and discloses a storage battery lead plaster water content detection device which comprises a pressing rod, a sample separation barrel, a support table and a sample weighing table. The support table is fixedly installed on the table top, a through hole is formed in the support table, and the sample weighing table is arranged below the through hole of the support table, fixed to the table top and used for measuring and drying a lead plaster sample; the sample separation barrel is arranged at the through hole of the support table and comprises a sample weighing barrel and a filter screen, the sample weighing barrel is of a barrel-shaped structure with an upper opening and a lower opening, the filter screen is arranged at the bottom of the sample weighing barrel, and the sample weighing barrel is used for containing storage battery lead plaster; the filter screen is used for dispersing the lead plaster, and the pressing rod is arranged in the sample weighing barrel to extrude the lead plaster, so that the lead plaster is dispersed from the filter screen and falls onto the sample weighing table. The drying effect of the storage battery lead plaster is improved, the water content testing time is shortened, and the device can also be used for measuring the water content of other materials and is wide in application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lead-acid battery material detection, and particularly relates to a lead paste water content detection device and method for lead-acid batteries. BACKGROUND

[0002] Lead-acid batteries have been increasingly used in various fields due to their high safety, low price and wide application. A lead-acid battery mainly comprises electrolyte, a tank cover and a pole group, wherein the pole group mainly comprises positive and negative plates and a separator. The separator mainly serves to store electrolyte, act as a gas passage for oxygen recombination, prevent active material from falling off and prevent short circuit between the positive and negative plates. The plate is composed of lead paste and a plate framework, and the plate framework is a mesh-shaped grid of aluminum-based alloy. The lead paste is a material mixed by lead powder, short fibers, additives and water in proportion. The lead paste is coated on the plate framework to form the plate. However, the water content of the lead paste has an important influence on the lead-acid battery. The standard requires that the water content of the lead paste is between 9-12%. When the water content is too high, the adhesion of the lead paste is not high, which easily leads to uneven thickness of the plate, low formation efficiency and rapid capacity attenuation. If the water content is too low, the flowability of the lead paste is poor, which makes it difficult to uniformly coat the grid, and the structure of the lead paste is dense after solidification, which makes it difficult for electrolyte to penetrate, leading to problems such as difficult formation, insufficient battery capacity and the like. Therefore, it is necessary to detect the water content of the lead paste.

[0003] The existing technology usually adopts a weighing method to detect the water content of the lead paste. After sampling the uniformly mixed lead paste, the sample is manually divided into several small pieces on a weighing table, the weight of the sample is measured, the sample is dried, and finally the weight of the dried sample is measured. However, the non-bound water in the center of the lead paste sample is not easy to evaporate during the drying process, which leads to a long time required for water content detection. SUMMARY

[0004] One of the purposes of the present application is to provide a lead paste water content detection device for lead-acid batteries to solve the problem of long detection time of the water content of the lead paste.

[0005] In order to achieve the above purpose, the technical solution adopted by the present application is as follows: The application discloses a kind of battery lead paste water content detection device, including pressure lever, sample bucket, support table, sample table;The support table is fixedly installed on desktop, and through hole is provided on support table, and sample table is arranged below the through hole of support table and is fixed on desktop, for measuring, drying lead paste sample;The sample bucket is arranged at the through hole of support table, and the sample bucket includes sample bucket and filter screen, the sample bucket is the barrel structure of upper and lower openings, and the filter screen is arranged at the bottom of sample bucket, and the sample bucket is used to hold battery lead paste;The filter screen is used to disperse lead paste, and the pressure lever is arranged in sample bucket and extrudes lead paste, so that it is dispersed from filter screen and falls on sample table.

[0006] Further, the sample table includes a weighing disc and a weighing table, the weighing disc is electrically connected to the weighing table, the weighing disc is used to measure the weight of the sample and heat and dry the sample, and the weighing table is used to display the moisture content and weight of the sample.

[0007] Further, the size of the weighing disc is greater than the size of the through hole, and the size of the lower opening of the sample bucket is not greater than the size of the through hole.

[0008] Further, the lower opening of the sample bucket is provided with a clamping edge for supporting the filter screen, and the size of the lower end of the pressure lever matches the inner diameter of the sample bucket.

[0009] Further, at least the surface of the filter screen is a rigid structure, and a plurality of dispersion holes are uniformly arranged on the surface of the filter screen.

[0010] Further, the device further includes a rubber sleeve, which is detachably installed on the sample bucket to prevent the pressure lever from falling.

[0011] Further, the sample table records the initial weight of the lead paste and the remaining weight after evaporation, and when the change in the remaining weight of the lead paste is less than 0.002 g within 2-5 min, the weighing disc automatically stops heating.

[0012] Compared with the prior art, the technical scheme has the following beneficial effects: The battery lead paste water content detection device can disperse the lead paste into a plurality of small particles with uniform particle size before drying the lead paste, and the dispersed lead paste directly enters the weighing disc for weighing and heating and drying, thereby improving the testing accuracy of the water content; by separately fixing the sample bucket and the sample table, the shaking of the sample bucket caused by the pressure lever during the pressing of the lead paste is prevented, thereby preventing damage to the sample table and prolonging the service life of the sample table; by separately arranging the sample bucket, the filter screen and the pressure lever, and detachably connecting the weighing disc and the weighing table, the parts of the device can be easily taken out for cleaning, and compared with the manual method of dividing the sample into a plurality of small pieces, the detection device is more convenient and fast.

[0013] The second object of the present application is to provide a lead paste water content detection method for storage battery, which uses the detection device of the above technical solution and shortens the test time of water content.

[0014] In order to achieve the above-mentioned object, the technical solution adopted by the present application is: A lead paste water content detection method for storage battery, which uses the detection device of the above technical solution and specifically includes the following steps: Step 1: After taking out 20-30g of lead paste sample at any position of the mixed lead paste and pressing it into a flat cake, the diameter of the cake is not greater than the size of the lower opening of the sample weighing barrel; Step 2: Turn on the display switch of the weighing table, put the pressed sample into the sample weighing barrel, press the lead paste down with the pressing rod, and the lead paste falls from the filter screen to the weighing disc for weighing, and the weighing table displays the weight m1 of the lead paste; Step 3: Turn on the heating switch of the weighing table, the weighing disc heats and dries the lead paste, and the weighing table records and displays the drying time and the remaining weight after evaporation. When the evaporation weight changes less than 0.002g within 2-5min, the heating switch automatically jumps off and the weighing disc stops heating, and the weight m2 of the lead paste after drying is recorded; Step 4: Calculate the water content of the lead paste: bring the measured value into the following formula to calculate the water content of the lead paste: K=(m1-m2)*100% / m1 In the formula: K---water content of lead paste; m1---weight of lead paste before drying; m2---weight of lead paste after drying.

[0015] Due to the adoption of the above technical solution, the present application has the following advantages compared with the prior art: the present application improves the drying effect of the lead paste of the storage battery, shortens the test time of the water content, and the device can also be used to measure the water content of other materials, and has a wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the lead paste water content detection device for storage battery of the present application; Figure 2 It is an exploded structural schematic diagram of the sample dividing barrel of the present application; Figure 3 It is an exploded structural schematic diagram of the sample weighing table of the present application; Figure 4 It is a structural schematic diagram of the rubber sleeve of the present application.

[0017] In the figure: 1 pressing rod; 2 rubber sleeve; 3 sample dividing barrel; 4 support table; 5 sample weighing table; 31 sample weighing barrel; 32 filter screen; 51 weighing disc; 52 weighing table; 321 dispersing hole. DETAILED DESCRIPTION

[0018] The application will be further described below with reference to the accompanying drawings: As shown in the accompanying drawings Figures 1-4 A lead paste water content detection device for storage battery includes a pressure rod 1, a sample separation barrel 3, a support table 4, and a sample weighing table 5. The support table 4 is a frame structure fixedly installed on a table top, and a through hole is arranged on the support table 4. The sample weighing table 5 is arranged below the through hole of the support table 4 and is fixed on the table top, and is used for measuring and drying the lead paste sample. The sample separation barrel 3 is arranged at the through hole of the support table 4, and includes a sample weighing barrel 31 and a filter screen 32. The filter screen 32 is arranged at the bottom of the sample weighing barrel 31. Specifically, the sample weighing barrel 31 is a barrel-shaped structure with openings at the top and bottom, and is used for containing the lead paste. The lower opening of the sample weighing barrel 31 is provided with a clamping edge for supporting the filter screen 32. After the filter screen 32 is placed into the sample weighing barrel 31 from the upper opening of the sample weighing barrel 31, the filter screen 32 is fixed on the upper side of the clamping edge. Since the sample weighing barrel 31 and the filter screen 32 are only in contact, the filter screen 32 can be easily disassembled and assembled, which facilitates the cleaning and replacement of the device. The lead paste is placed into the sample weighing barrel 31, the pressure rod 1 is inserted into the sample weighing barrel 31 and presses the lead paste downward, and the filter screen 32 disperses the lead paste into small particles with uniform particle size and then falls onto the sample weighing table 5. The sample weighing table 5 includes a weighing disc 51 and a weighing table 52. The weighing disc 51 is detachably electrically connected to the weighing table 52. The weighing disc 51 is used for measuring the weight of the sample and heating and drying the sample. The weighing table 52 is used for displaying the water content and weight of the sample. The weighing disc 51 and the weighing table are detachably connected, which facilitates the cleaning and cleaning of the weighing disc 51.

[0019] The sample weighing table 5 can record the initial weight of the lead paste and the remaining weight after evaporation. When the change amount of the remaining weight of the lead paste is less than 0.002 g within 2-5 min, the weighing disc 51 automatically stops heating, i.e., the drying is completed.

[0020] In one embodiment, the size of the weighing disc 51 is greater than the size of the through hole, the size of the lower opening of the sample weighing barrel 31 is not greater than the size of the through hole, and the size of the lower end of the pressure rod 1 matches the inner diameter of the sample weighing barrel 31. Further, the pressure rod 1 includes a pressing block and a handle. The pressing block is matched with the sample weighing barrel 31, and the handle is rod-shaped and fixedly connected to the upper portion of the pressing block.

[0021] In one embodiment, at least the surface of the filter screen 32 is a rigid structure, and a plurality of dispersion holes 321 are uniformly arranged on the surface of the filter screen 32. Preferably, 10-30 dispersion holes 321 are arranged on the filter screen 32. The dispersion holes 321 can ensure the uniformity of the dispersion of the lead paste, and can also prevent the lead paste from being dispersed too much and falling off the weighing disc 51.

[0022] In a preferred embodiment, a rubber sleeve 2 is further included, which is detachably mounted on the sample weighing barrel 31. Before pressing the lead paste, the rubber sleeve 2 is taken off the sample weighing barrel 31 and placed on a table top to temporarily store the pressing rod 1. After the pressing of the lead paste is completed, the rubber sleeve 2 is placed on the upper opening of the sample weighing barrel 31 to fix the pressing rod 1 and prevent the pressing rod 1 from falling out.

[0023] The working process of the device is as follows: first, a sample is taken out from the lead paste of the storage battery and placed in the sample weighing barrel 31, and then the sample is pressed downward by the pressing rod 1 to pass through the filter screen 32, so that a uniform small piece of sample is obtained, the weight of which is measured as 20-30g and recorded as the weight before drying. Then, the sample weighing table 5 is opened to dry the lead paste sample. At this time, the lead paste sample has a relatively large surface area, so that the drying speed of the lead paste sample is accelerated. After the lead paste sample is dried, the weight of the sample in the weighing disc 51 at this time is measured again and recorded as the weight after drying. The weight of water in the sample can be obtained by subtracting the weight after drying from the weight before drying, so that the water content of the lead paste of the storage battery can be calculated.

[0024] The application further provides a method for detecting the water content of lead paste of a storage battery, which applies the detection device as described above and comprises the following steps: Step 1: after a 20-30g sample of the mixed lead paste is taken out, the sample is pressed into a flat cake, and the diameter of the cake is not greater than the size of the lower opening of the sample weighing barrel 31. Step 2: the display switch of the weighing table 52 is turned on, the pressed sample is placed in the sample weighing barrel 31, and the lead paste is pressed by pressing the pressing rod 1. The lead paste falls from the filter screen 32 to the weighing disc 51 to be weighed, and the weighing table 52 displays the weight m1 of the lead paste. Step 3: the heating switch of the weighing table 52 is turned on, the weighing disc 51 heats to dry the lead paste, and the weighing table 52 records and displays the drying time and the weight after evaporation. When the evaporation weight changes less than 0.002g within 2-5min, the heating switch is automatically turned off, the weighing disc 51 stops heating, and the weight m2 of the lead paste after drying is recorded. Step 4: the water content of the lead paste is calculated by bringing the measured value into the following formula: K=m1-m2*100% / m1 In the formula, K represents the water content of the lead paste, m1 represents the weight of the lead paste before drying, and m2 represents the weight of the lead paste after drying.

[0025] The application is further described below in combination with an embodiment: Taking 116 (E2-1) positive lead paste as an example, 6 samples are randomly taken, each sample is a square with a side length of about 1 cm, and the weight is basically 20 g at this time; and the 6 samples are randomly divided into two groups, the first group uses the detection device and the detection method of the application to measure the water content of the lead paste, and the second group uses the manual method to divide the sample into small pieces and then measures the water content of the lead paste on the sample weighing table 5, and records the change of the water content of the lead paste per minute, and the specific data is as follows: Table 1 Water content of 116 (E2-1) positive lead paste (%)

[0026] From the comparison of the water content results measured by the detection device and the manual sample division in Table 1, it can be seen that the deviation of the water content of the lead paste measured by the detection device of the application and the water content measured by the manual method is basically within 0.08%, but the time used by the first group is shortened by 4 minutes compared with the time used by the second group. The detection device and the detection method of the application can accurately and quickly obtain the water content of the lead paste, and greatly shorten the detection time of the water content and improve the detection efficiency.

[0027] The embodiments are only illustrative of the concept and implementation of the application, and are not limiting, and under the concept of the application, the technical solutions without substantial changes are still within the protection scope.

Claims

1. A device for detecting the moisture content of lead paste in a storage battery, characterized in that, The system includes a pressure rod (1), a sample container (3), a support platform (4), and a weighing platform (5). The support platform (4) is fixedly installed on a tabletop and has a through hole. The weighing platform (5) is located below the through hole of the support platform (4) and fixed on the tabletop. It is used to measure and dry lead paste samples. The sample container (3) is located at the through hole of the support platform (4). The sample container (3) includes a weighing container (31) and a filter screen (32). The weighing container (31) is a barrel-shaped structure with openings at the top and bottom. The filter screen (32) is located at the bottom of the weighing container (31). The weighing container (31) is used to hold battery lead paste. The filter screen (32) is used to disperse the lead paste. The pressure rod (1) is located inside the weighing container (31) to squeeze the lead paste, causing it to disperse from the filter screen (32) and fall onto the weighing platform (5).

2. The battery lead paste moisture content detection device as described in claim 1, characterized in that, The weighing platform (5) includes a weighing disc (51) and a weighing platform (52). The weighing disc (51) is detachably electrically connected to the weighing platform (52). The weighing disc (51) is used to measure the weight of the sample and to heat and dry the sample. The weighing platform (52) is used to display the moisture content and weight of the sample.

3. The battery lead paste moisture content detection device as described in claim 2, characterized in that, The size of the weighing disc (51) is larger than the size of the through hole, and the size of the opening on the lower side of the weighing sample bucket (31) is not larger than the size of the through hole.

4. The battery lead paste moisture content detection device as described in claim 2, characterized in that, The lower opening of the weighing sample bucket (31) is provided with a retaining edge to support the filter screen (32), and the lower end of the pressure rod (1) is matched with the inner diameter of the weighing sample bucket (31).

5. The battery lead paste moisture content detection device according to claim 1, characterized in that, The filter screen (32) has at least a rigid structure on its surface, and the surface of the filter screen (32) is uniformly provided with a plurality of dispersed holes (321).

6. The battery lead paste moisture content detection device as described in claim 1, characterized in that, It also includes a rubber sleeve (2), which is detachably installed on the weighing sample bucket (31) to prevent the pressure bar (1) from falling off.

7. The battery lead paste moisture content detection device as described in claim 2, characterized in that, The weighing platform (5) records the initial weight of the lead paste and the remaining weight after evaporation. When the change in the remaining weight of the lead paste is less than 0.002g within 2-5 minutes, the weighing disc (51) automatically stops heating.

8. A method for detecting the moisture content of lead paste in a storage battery, characterized in that, The detection of lead paste moisture content in batteries using the device described in any one of claims 1 to 7 specifically includes the following steps: Step 1: Take 20-30g of lead paste sample from any position in the well-mixed lead paste and press it into a flat cake shape. The diameter of the cake shape shall not be greater than the size of the opening on the lower side of the weighing sample container (31). Step 2: Turn on the display switch of the weighing platform (52), put the flattened sample into the weighing bucket (31), press down the pressure rod (1) to press down the lead paste, and the lead paste falls from the filter screen (32) onto the weighing disc (51) for weighing. The weighing platform (52) displays the weight m1 of the lead paste. Step 3: Turn on the heating switch of the weighing platform (52), and the weighing disc (51) heats and dries the lead paste. The weighing platform (52) records and displays the drying time and the remaining weight after evaporation. When the change in evaporation weight is less than 0.002g within 2-5 minutes, the heating switch will automatically turn off, the weighing disc (51) will stop heating, and the weight m2 of the lead paste after drying will be recorded. Step 4: Calculate the moisture content of the lead paste: Substitute the measured values ​​into the following formula to calculate the moisture content of the lead paste: K = (m1 - m2) * 100% / m1 In the formula: K---moisture content of lead paste; m1---weight of lead paste before drying; m2---weight of lead paste after drying.

Images