Composite anti-falling back cover for tubular positive plate of lead-acid storage battery

Abstract

The utility model relates to the technical field of lead-acid storage batteries, in particular to a composite anti-falling back cover for a tubular positive plate of a lead-acid storage battery. The composite anti-falling back cover for the tubular positive plate of the lead-acid storage battery comprises a positive tube bank and further comprises a back cover mechanism and a fixing mechanism which are arranged at the bottom of the positive tube bank, the back cover mechanism comprises a base, a cylindrical inner back cover is arranged on the upper portion of the base, and horizontal grooves are symmetrically formed in the two sides of the base; each fixing mechanism comprises a fixing base, a semi-arc-shaped fixing shell is fixed to the top of each fixing base, a protrusion is arranged on the inner side of each fixing base, and the two fixing mechanisms are symmetrically arranged. According to the composite anti-falling back cover for the tubular positive plate of the lead-acid storage battery, the back cover piece of the positive plate can be effectively prevented from falling off, active substances of the positive plate can be effectively prevented from falling off, and the cycle durability of the storage battery is improved on the premise that other conditions are the same.

Description

Technical Field

[0001] The utility model relates to the technical field of lead-acid batteries, and particularly relates to a composite anti-drop bottom seal for a tubular positive plate of a lead-acid battery. Background Art

[0002] There are usually two ways to seal the bottom of a tubular positive plate of a lead-acid battery. One is ultrasonic welding for automatic bottom sealing, and the other is manual bottom sealing.

[0003] Ordinary manual bottom sealing is cylindrical, with a groove in the middle to accommodate lead bars. The outer diameter of the cylinder is slightly smaller than the inner diameter of the row pipe. The structure is simple, but problems such as incomplete bottom sealing and curling are likely to occur during operation. Patent CN202651289U discloses a bottom sealing component for a tubular lead-acid battery. The difference from ordinary manual bottom sealing is that it adds a bracket, which reduces the friction during bottom sealing installation, but cannot solve problems such as incomplete bottom sealing and curling of the row pipe. Neither ordinary manual bottom sealing nor the bottom sealing component disclosed in this patent has anti-drop performance and cannot eliminate the risk of dropping.

[0004] Ultrasonic bottom sealing is similar in structure to ordinary manual bottom sealing. After installation and bottom sealing, ultrasonic welding is used to firmly connect the bottom seal to the row pipe. However, with the deepening of the battery charge and discharge cycle, there is a risk of detachment at the welding part, and the anti-drop performance is poor, and the risk of detachment cannot be completely eliminated.

[0005] Both of the above two bottom sealing methods may lead to the premature termination of the battery cycle life. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is: overcoming the deficiencies of the prior art, providing a composite anti-drop bottom seal for a tubular positive plate of a lead-acid battery, which can effectively prevent the detachment of the bottom seal of the positive plate, can effectively prevent the detachment of the positive active material of the positive plate, and improves the cycle durability of the battery under the premise of the same other conditions.

[0007] The technical solution of the utility model is as follows:

[0008] The composite anti-drop bottom seal for a tubular positive plate of a lead-acid battery includes a positive row pipe, and also includes a bottom sealing mechanism and a fixing mechanism at the bottom of the positive row pipe. The bottom sealing mechanism includes a base, a cylindrical inner bottom seal is arranged on the upper part of the base, and horizontal grooves are symmetrically arranged on both sides of the base; the fixing mechanism includes a fixing seat, a semi-cylindrical fixing shell is fixed on the top of the fixing seat, a protrusion is arranged inside the fixing seat, and there are two fixing mechanisms, which are symmetrically arranged.

[0009] Further, the protrusion and the groove fit together.

[0010] Further, the inner diameter of the semi-circular fixed shell is equal to the outer diameter of the tubular positive electrode row tube, and the outer diameter of the inner bottom seal is equal to the inner diameter of the tubular positive electrode row tube.

[0011] Further, a bent long strip-shaped fixing claw is provided upward at the top of the inner bottom seal.

[0012] Further, the widest outer edge of the fixing claw is less than or equal to the inner diameter of the tubular positive electrode row tube.

[0013] Further, the length by which the positive electrode lead bar at the inner bottom position of the tubular positive electrode row tube retracts upward is less than or equal to the length of the inner bottom seal plus the fixing claw in the vertical direction.

[0014] The widest outer edge of the fixing claw is less than or equal to the inner diameter of the tubular positive electrode row tube.

[0015] The length by which the positive electrode lead bar at the inner bottom position of the tubular positive electrode row tube retracts upward is less than or equal to the length of the inner bottom seal plus the fixing claw in the vertical direction.

[0016] The automatic bottom sealing machine completely inserts the inner bottom seal into the filled positive electrode plate, and buckles the protrusions into the grooves from both sides and locks them.

[0017] After the positive electrode plate is subjected to the curing and drying treatment, due to the oxidation reaction of lead and the hydration reaction of lead sulfate occurring during the curing of the positive electrode paste. The molecular bonds are connected and tightly combined, locking the fixing claw in the paste. Achieving the effect of firm bottom sealing and not easy to fall off.

[0018] Due to the locking of the protrusions and the grooves, the semi-circular fixed shell tightly wraps the bottom of the positive electrode plate row tube from both sides. When the charge and discharge cycle of the storage battery proceeds deeply to about 1000 times, the positive electrode active material softens and falls off from the bottom of the row tube. The semi-circular fixed shell effectively weakens the overflow of the active material into the sulfuric acid solution, delays the continuous falling off of the active material, and thus improves the cycle durability of the storage battery.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] 1) The composite anti-falling bottom sealing of the tubular positive electrode plate of the lead-acid storage battery of the present utility model can effectively prevent the falling off of the bottom sealing member of the positive electrode plate, can effectively prevent the falling off of the positive electrode plate active material, and improves the cycle durability of the storage battery on the premise that other conditions are the same.

[0021] 2) The present utility model uses the anti-falling composite bottom sealing. The inner bottom seal of the bottom sealing mechanism is embedded in the inner bottom of the positive electrode row tube, and the fixing claw contacts the poured positive electrode slurry, increasing the contact area. After the subsequent slurry is cured and dried, the fixing claw can be embedded in the cured positive electrode slurry, making the bottom sealing mechanism more firm and difficult to fall off.

[0022] 3) The present utility model uses two symmetrical fixing mechanisms. The semi-circular fixing shells of the fixing mechanisms are buckled from both sides along the outer diameter of the positive electrode row tube. The protrusions on the inner side of the fixing seat are snapped into the grooves of the base, realizing the fixation of the bottom sealing mechanism and the positive electrode row tube, making it difficult for the bottom sealing mechanism to fall off from the bottom of the positive electrode row tube, delaying the shedding of the active material at the bottom sealing, and obtaining a longer cycle life.

[0023] 4) The anti-detachment composite bottom seal described in the present utility model is fixed by buckling two semi-circular fixing shells from both sides. Compared with the integrally formed hollow frustum-shaped bottom seal, problems such as incomplete bottom sealing and curling will not occur during the bottom sealing process, and the qualification rate of the bottom sealing is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structural schematic diagram of the composite anti-detachment bottom seal of the tubular positive electrode plate of the lead-acid battery described in the present utility model;

[0025] In the figure:

[0026] 1. Positive electrode row tube; 2. Base; 3. Groove; 4. Inner bottom seal; 5. Fixing claw; 6. Semi-circular fixing shell; 7. Fixing seat; 8. Protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model.

[0028] Embodiment 1

[0029] As Figure 1 shown, for the composite anti-detachment bottom seal of the tubular positive electrode plate of the lead-acid battery, the positive electrode row tube 1 further includes a bottom sealing mechanism and a fixing mechanism at the bottom of the positive electrode row tube 1. The bottom sealing mechanism includes a base 2, a cylindrical inner bottom seal 4 is provided on the upper part of the base 2, a bent strip-shaped fixing claw 5 extends upward from the top of the inner bottom seal 4, and horizontal grooves 3 are symmetrically provided on both sides of the base 2; the fixing mechanism includes a fixing seat 7, a semi-circular fixing shell 6 is fixed on the top of the fixing seat 7, a protrusion 8 is provided on the inner side of the fixing seat 7, and there are two fixing mechanisms, which are symmetrically arranged.

[0030] The protrusion 8 and the groove 3 fit together, the inner diameter of the semi-circular fixing shell 6 is equal to the outer diameter of the positive electrode row tube 1, and the outer diameter of the inner bottom seal 4 is equal to the inner diameter of the positive electrode row tube 1.

[0031] The widest outer edge of the fixing claw 5 is less than or equal to the inner diameter of the positive electrode row tube 1.

[0032] The length by which the positive electrode lead bar at the inner bottom position of the positive electrode row tube 1 retracts upward is equal to the sum of the lengths of the inner bottom seal 4 and the fixing claw 5 in the vertical direction.

[0033] Working principle: During bottom sealing, first insert the cylindrical inner bottom seal 4 of the bottom sealing mechanism into the inner bottom of the positive electrode row tube 1. Then, use two symmetrical fixing mechanisms. The semi-circular fixing shell 6 of the fixing mechanism buckles from both sides along the outer diameter of the positive electrode row tube 1, and the protrusion 8 inside the fixing seat 7 is snapped into the groove of the base 2, realizing the fixation of the bottom sealing mechanism and the positive electrode row tube 1, making it difficult for the bottom sealing mechanism to fall off from the bottom of the positive electrode row tube. The fixing claws 5 at the top of the inner bottom seal 4 come into contact with the poured positive electrode slurry, increasing the contact area. After the subsequent slurry solidifies and dries, the fixing claws 5 can be embedded in the solidified positive electrode slurry, making the bottom sealing mechanism more firm and difficult to fall off.

Claims

1. A composite anti - shedding bottom seal for a tubular positive plate of a lead - acid battery, comprising a positive electrode row tube (1), characterized in that, It further includes a bottom sealing mechanism and a fixing mechanism at the bottom of the positive electrode row pipe (1). The bottom sealing mechanism includes a base (2), a cylindrical inner bottom seal (4) is arranged on the upper part of the base (2), and horizontal grooves (3) are symmetrically arranged on both sides of the base (2); the fixing mechanism includes a fixing seat (7), a semi-circular fixing shell (6) is fixed on the top of the fixing seat (7), a protrusion (8) is arranged inside the fixing seat (7), and there are two fixing mechanisms, which are symmetrically arranged.

2. The tubular positive plate composite anti-detachment bottom seal of the lead-acid battery according to claim 1, wherein The protrusion (8) fits with the groove (3).

3. The tubular positive plate composite anti-detachment bottom seal of the lead-acid battery according to claim 2, characterized in that, The inner diameter of the semi-circular fixing shell (6) is equal to the outer diameter of the positive electrode row pipe (1), and the outer diameter of the inner bottom seal (4) is equal to the inner diameter of the positive electrode row pipe (1).

4. The tubular positive plate composite anti-dropping bottom seal for lead-acid batteries according to claim 1, characterized in that, A bent long strip-shaped fixing claw (5) is arranged upward at the top of the inner bottom seal (4).

5. The tubular positive plate composite anti - shedding bottom seal of the lead - acid battery according to claim 4, characterized in that, The widest outer edge of the fixing claw (5) is less than or equal to the inner diameter of the tubular positive electrode row pipe (1).

6. The tubular positive plate composite anti-detachment bottom seal of the lead-acid battery according to claim 5, characterized in that The length by which the positive electrode lead bar at the inner bottom position of the tubular positive electrode row pipe (1) retracts upward is less than or equal to the vertical length of the inner bottom seal (4) plus the fixing claw (5).

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