Auxiliary tool for testing oxidation resistance of PE partition plate of lead-acid storage battery

Abstract

The utility model discloses an auxiliary tool for testing the oxidation resistance of a lead-acid storage battery PE (Poly Ethylene) partition plate. The auxiliary tool comprises a suspension bracket capable of suspending partition plate splines and a plurality of partition sheets for partitioning the partition plate splines, the suspension frame comprises two vertical frames which are distributed side by side; the vertical frame comprises an upper cross rod, a lower cross rod and vertical rods, the vertical rods are vertically connected to the middle of the upper cross rod and the middle of the lower cross rod, and the height of the vertical rods is not smaller than half of the width of the partition plate sample strip; after the middle parts of the lower cross rods at the lower ends of the two vertical frames are connected through a longitudinal rod, the distance between the center lines of the two upper cross rods is consistent with the center distance between the two hanging holes in the two ends of the partition plate sample strip; and through holes are formed in the separation sheets. The device can fix the separator sample strip in the oxidation resistance test process of the lead-acid storage battery PE separator, simulates the use environment of the separator in the storage battery, and prevents the sample strip from floating in the oxidation process to influence the oxidation effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid batteries, and in particular relates to an auxiliary tooling for testing the oxidation resistance of a PE separator of a lead-acid battery. Background Art

[0002] The separator is an important component of the battery. Its main function is to prevent the positive and negative electrodes from short-circuiting, and to allow the electrolyte to diffuse freely and the ions to migrate. The life of the separator plays a decisive role in the service life of the battery. The separator of the lead-acid battery is exposed to corrosive sulfuric acid and is oxidized and corroded by the positive active substances, oxygen, peroxides and chemical impurities. In order to prevent the battery from failing prematurely due to short circuit, the separator is required to have sufficient oxidation stability, and also to have good tensile strength to ensure that the separator will not be pierced by sharp edges or small particles during the production and assembly of the battery. At present, the microporous polyethylene (PE) bag separator is mostly used in automotive flooded lead-acid batteries. The PE separator has a small pore size, extremely low resistance and an extremely thin base, which is easy to make into a bag type and suitable for the continuous production of batteries, but the PE separator has poor antioxidant performance. In order to obtain the resistance value of the PE separator to oxidation corrosion, according to the national standard requirements, the sample should be treated with hydrogen peroxide in sulfuric acid at 80°C (176K), and the antioxidant performance of the separator should be determined by comparing the transverse elongation before and after a specific test time interval. When conducting oxidation resistance tests according to national standards, the traditional method is to immerse the separator specimens directly in the oxidation liquid. In actual testing, the gas released by the oxidation liquid adheres to the surface of the separator specimens, and the specimens tend to float on the surface of the oxidation liquid. Parts of the specimens fail to contact the oxidation liquid and do not play an oxidation role, which can easily cause test errors. Using heavy objects to press the specimens will result in: the pressed part does not contact the oxidation liquid; and the specimens are placed horizontally to contact the oxidation liquid, and the floating force direction is different from the actual state of the separator in the battery; this will also cause differences in test results.

[0003] At present, some lead-acid battery manufacturers have designed a spline suspension device, which includes a middle column, and a rib group is arranged on the outer periphery of the column. Each rib group consists of two upper and lower ribs arranged side by side. The ribs are perpendicular to the column, and the round holes at both ends of the spline are inserted into the two ribs of the same group. The partition spline can be suspended vertically to avoid the above-mentioned defect of incomplete oxidation; but because the ribs are 90° perpendicular to the horizontal plane, during the oxidation process of the partition, the gas generated in the oxidation liquid rises and will be blocked by the ribs, which has the risk of over-oxidation and will also cause test errors. Therefore, it is necessary to design a tool to avoid the above-mentioned test errors. Summary of the invention

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art, thereby providing an auxiliary tooling for testing the oxidation resistance of PE separators of lead-acid batteries, which can fix separator strips during the oxidation resistance testing process of PE separators of lead-acid batteries, simulate the use environment of the separators in the battery, and avoid the floating of the strips during the oxidation process to affect the oxidation effect.

[0005] The technical solution of the utility model is: an auxiliary tool for testing the oxidation resistance of a lead-acid battery PE separator, comprising a hanging frame for hanging separator strips and a plurality of separators for separating the separator strips;

[0006] The suspension frame includes two vertical frames arranged side by side;

[0007] The stand comprises an upper crossbar, a lower crossbar and a vertical bar, the middle part of the upper crossbar and the middle part of the lower crossbar are vertically connected with a vertical bar, and the height of the vertical bar is not less than half of the width of the partition spline;

[0008] After the middle parts of the lower cross bars at the lower ends of the two vertical frames are connected by the longitudinal bars, the spacing between the center lines of the two upper cross bars is consistent with the center distance of the two hanging holes at the two ends of the partition spline;

[0009] The separator is provided with perforations.

[0010] The aperture of the perforation is not larger than the diameter of the upper cross bar, and the diameter of the upper cross bar is not larger than the aperture of the hanging holes at both ends of the partition plate spline.

[0011] A plurality of the separation sheets are sleeved on the upper cross bar at the end of the upper cross bar and between two adjacent partition plate strips.

[0012] The cross bar, the lower cross bar, the vertical bar and the longitudinal bar are all made of materials with good oxidation resistance.

[0013] The crossbar, the lower crossbar, the vertical bar and the longitudinal bar are all made of glass or polytetrafluoroethylene.

[0014] The vertical rod and the longitudinal rod are both telescopic rods.

[0015] The utility model has a simple structure and can quickly install and fix the separator strip. The utility model is mainly used to fix the separator strip during the oxidation resistance test of the PE separator of the lead-acid battery, and at the same time simulates the use environment of the separator in the battery and avoids the floating of the strip during the oxidation process to affect the oxidation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 is a schematic diagram of the diaphragm spline;

[0018] Figure 3Schematic diagram of the separator. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0020] like Figure 1-3 As shown, the hanging frame of the utility model embodiment is composed of two I-shaped vertical frames and a longitudinal rod 3. The vertical frame includes an upper crossbar 1, a lower crossbar 4 and a vertical rod 2. The vertical rod 2 is vertically connected to the middle position between the upper crossbar 1 and the lower crossbar 4. The longitudinal rod 3 is connected between the two lower crossbars 4. The vertical rod 2 acts as a base after being connected to the two lower crossbars 4, so that the tooling can be stably placed; the two I-shaped vertical frames are parallel to each other, and the two upper crossbars 1 at the upper end are used to place the partition spline 5. The spacing between the center lines of the two upper crossbars 1 is consistent with the center distance of the two hanging holes 7 at both ends of the partition spline. The spacing between the center lines of the two upper crossbars 1 is greater than the inner spacing a of the two hanging holes 7 at both ends of the partition spline, and is smaller than the outer spacing b of the two hanging holes 7 of the partition spline. The diameter of the upper crossbar 1 is equal to or slightly smaller than the aperture of the hanging holes 7 at both ends of the partition spline. The two hanging holes 7 of the partition spline 5 are respectively inserted into the two horizontal upper crossbars 1. The diameter of the upper crossbar 1 is not larger than the aperture c of the hanging holes 7 at both ends of the partition spline 5. The length of the upper crossbar 1 is suitable for placing a beaker, and the two vertical frames are of the same size; the height of the vertical bar 2 is slightly larger than half the width of the partition spline 5 to ensure that the partition spline 5 does not contact the bottom crossbar. There are perforations 8 on the separator 6, and the aperture d of the perforations 8 is smaller than the diameter of the upper crossbar 1. During the anti-oxidation test, the hanging holes 7 at both ends of the partition spline 5 are respectively inserted into the two upper crossbars 1, and multiple splines can be placed. The splines are separated by separators 6, and the outermost spline uses separators 6 to block the edge of the upper crossbar 1 to prevent the spline from falling off.

[0021] The crossbar 1, the lower crossbar 4, the vertical bar 2 and the longitudinal bar 3 are all made of glass, and can also be made of other materials that are resistant to oxidation, stable in performance and free of precipitates.

[0022] In another embodiment, the vertical rod 2 and the longitudinal rod 3 are both retractable rods, so as to adapt to the partition strips of different sizes.

[0023] The beneficial effects achieved by the utility model are that the structure is simple, the separator strips can be fixed during the oxidation resistance test of the PE separator of the lead-acid battery, the use environment of the separator in the battery can be simulated, and the floating of the strips during the oxidation process can be avoided to affect the oxidation effect.

Claims

1. An auxiliary tool for testing the oxidation resistance of PE separators of lead-acid batteries, characterized by: It comprises a hanging frame capable of hanging the partition strips (5) and a plurality of partition plates (6) for separating the partition strips (5); The suspension frame includes two vertical frames arranged side by side; The stand comprises an upper crossbar (1), a lower crossbar (4) and a vertical bar (2); the middle of the upper crossbar (1) and the middle of the lower crossbar (4) are vertically connected with the vertical bar (2); the height of the vertical bar (2) is not less than half the width of the partition plate strip (5); After the middle parts of the lower cross bars (4) at the lower ends of the two upright frames are connected via the longitudinal bars (3), the spacing between the center lines of the two upper cross bars (1) is consistent with the center distance between the two hanging holes (7) at the two ends of the partition plate spline (5); The separator (6) is provided with a perforation (8).

2. The auxiliary tooling for testing the oxidation resistance of PE separator of lead-acid battery according to claim 1, characterized in that: The diameter of the through hole (8) is not larger than the diameter of the upper cross bar (1), and the diameter of the upper cross bar (1) is not larger than the diameter of the hanging holes (7) at both ends of the partition plate spline (5).

3. The auxiliary tooling for testing the oxidation resistance of PE separator of lead-acid battery according to claim 1, characterized in that: A plurality of the separation sheets (6) are sleeved on the end of the upper cross bar (1) and on the upper cross bar (1) between two adjacent partition strips (5).

4. The auxiliary tooling for testing the oxidation resistance of PE separator of lead-acid battery according to claim 1, characterized in that: The cross bar (1), the lower cross bar (4), the vertical bar (2) and the longitudinal bar (3) are all made of materials with good oxidation resistance.

5. According to claim 1 or a lead-acid battery PE separator oxidation resistance test auxiliary tooling, characterized in that: The cross bar (1), the lower cross bar (4), the vertical bar (2) and the longitudinal bar (3) are all made of glass or polytetrafluoroethylene.

6. According to claim 1 or a lead-acid battery PE separator oxidation resistance test auxiliary tooling, characterized in that: The vertical rod (2) and the longitudinal rod (3) are both telescopic rods.

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