JP2008130439A - Method and device for recovering grid body from lead acid battery electrode plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for recovering a grid body from a defective lead acid battery electrode plate passed through aging and drying processes of an active material by separating the active material therefrom. <P>SOLUTION: For recovering and reusing a material constituting the grid body formed of lead or lead alloy from the defective lead acid battery electrode plate 2 formed through the aging and drying processes after applying the active material mainly composed of lead oxide to the grid body, the lead acid battery electrode plate 2 is supplied to a rolling device 1 to pulverize the active material simultaneously with rolling of the grid body. The active material is thereby separated from the grid, and the material constituting the grid body is recovered. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention separates an active material from a grid of a lead storage battery electrode plate and recovers the material constituting the grid body and uses the grid recovery method of the lead storage battery plate and implements this method. The present invention relates to a lattice body recovery apparatus.

  For example, as disclosed in Patent Document 1, a manufacturing process of a lead-acid battery electrode plate includes a grid body manufacturing process for manufacturing a grid body made of lead or a lead alloy, and lead oxide powder is kneaded with water and sulfuric acid. A paste manufacturing process for manufacturing a paste as an active material, a paste filling process for filling the grid with the paste, and an aging drying process for drying after filling the electrode plate after filling.

The electrode plate dried through the aging and drying process is then sent to the assembly process and incorporated into the lead storage battery in an uncharged state, or formed in the next process to form a charged electrode plate. Later, it is sent to an assembly process and incorporated into a lead-acid battery.
Japanese Patent Laid-Open No. 58-102467

  In each process of the production process of the lead-acid battery electrode plate, a defective product that cannot be sent to the subsequent process may be generated due to various factors. Since the active material of the damaged product generated in the process prior to the aging drying process is undried, the active material can be easily separated from the grid by a method such as washing with water, and the grid can be recovered. . The collected lattice can be redissolved and used as a raw material for the lattice manufacturing process. However, in the electrode plate that has undergone the aging and drying step, it is difficult to separate the active material from the lattice because the active material is firmly fixed to the lattice. For this reason, conventionally, the electrode plates that have been inevitably produced after the aging drying step have been discarded.

  It is an object of the present invention to easily recover and reuse a material constituting a lattice body by easily separating an active material from a damaged product of an electrode plate for a lead storage battery after undergoing an aging drying step. It is providing the grid body collection | recovery method of the grid body collection | recovery of the electrode plate for lead acid batteries, and implementing this method.

  The present invention comprises a grid of lead-acid battery plates prepared by applying an active material mainly composed of lead oxide to a grid of lead or a lead alloy, followed by an aging and drying process. In the present invention, the active material is pulverized and separated from the grid body by rolling the electrode plate for the lead storage battery in the present invention. Collect the constituent material.

  When the electrode plate for a lead storage battery is rolled, the portion of the grid of the electrode plate is made of lead or a lead alloy, so that it has excellent ductility and malleability and is stretched without being broken. On the other hand, the matured and dried active material is an aggregate of powder and can hardly be deformed, so when it is rolled, it is in a state of being crushed into pieces and almost completely removed from the lattice. And separated from the grid.

  Therefore, according to the present invention, the grid body can be recovered from the dried electrode plate, which has been unavoidably discarded, and can be reused, and the production yield of the lead-acid battery plate can be improved. Effective use of resources can be achieved.

  The grid plate recovery device for a lead storage battery plate for carrying out the above method includes a rolling device for rolling the plate for a lead storage battery from which the grid plate should be recovered, and the electrode plate from which the grid plate should be recovered by the rolling device The active material fixed to the grid body of the electrode plate is pulverized and separated from the grid body.

  In a preferred aspect of the present invention, the rolling device includes a plurality of rolling mechanisms each composed of a pair of rolling rollers that roll while moving in one direction with an electrode plate from which the grid body is to be collected interposed therebetween. The plurality of rolling mechanisms are arranged in a line with the same moving direction of the electrode plates to be rolled, and are configured to roll the electrode plates from which the lattice bodies are to be collected in multiple stages.

  The peripheral speed of each rolling roller of the plurality of rolling mechanisms is set so that the peripheral speed of the rolling roller of the rolling mechanism disposed on the rear stage side is higher than the peripheral speed of the rolling roller of the rolling mechanism disposed on the front stage side. It is preferred that

  When a plurality of rolling mechanisms are arranged side by side in this way and the peripheral speed of the rolling rollers of the plurality of rolling mechanisms is increased stepwise, the electrode plate supplied to the rolling mechanism is pulled between the rolling mechanisms. Because it is rolled gradually, the electrode plate with the solidified active material attached can be rolled without difficulty, and the active material can be reliably separated by rolling to a sufficiently thin thickness without destroying the grid. it can.

  As described above, according to the present invention, by rolling the electrode plate for a lead storage battery from which the lattice body is to be recovered and extending the lattice body portion of the electrode plate, the aged and dried active material is pulverized. Since it was separated from the grid body and separated, the grid body could be recovered from the dried electrode plate, which had been unavoidably discarded, and reused, improving the yield of lead-acid battery plate manufacturing In addition, the advantage is that resources can be used effectively.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1A and 1B show an example of the configuration of an active material separation device used for carrying out the active material separation method of the present invention. FIG. 1A is a front view, and FIG. It is a left side view. In these drawings, reference numeral 1 denotes a rolling device for rolling a lead storage battery electrode plate from which a grid body is to be recovered. In this embodiment, the rolling device 1 has an electrode plate 2 from which the grid body is to be recovered. A plurality of rolling mechanisms 3A to 3D (four in the illustrated example) having a pair of rolling rollers that roll while moving in the direction are provided, and these rolling mechanisms are aligned in the same moving direction of the electrode plates to be rolled. It arrange | positions side by side and it is comprised so that the electrode plate 2 which should collect | recover a grid | lattice body may be rolled in multiple steps.

  In the illustrated example, four rolling mechanisms 3A, 3B, 3C, and 3D are arranged side by side in the vertical direction. Each of the rolling mechanisms 3A to 3D includes driving side rolling rollers 301A to 301D and driven side rolling rollers 303A to 303D that are pressed by the pressing springs 302A to 302D and pressed against the driving side rolling rollers 301A to 301D, respectively. The series of rolling mechanisms 3 </ b> A to 3 </ b> D are arranged so that the respective driving side and driven side rolling rollers are opposed to each other in the horizontal direction with one vertical plane extending in the rolling direction of the electrode plate 2 therebetween. As the rollers constituting the rolling rollers 301 </ b> A to 301 </ b> D and 303 </ b> A to 303 </ b> D, rollers having the same diameter and length (in the illustrated example, a roller having a diameter of 60 mm × a length of 250 mm) are used.

  In this embodiment, the rotation shaft of the drive-side rolling roller 301A of the first-stage rolling mechanism 3A is connected to the rotation shaft of an electric motor (not shown) via a speed reduction mechanism, and the drive-side rolling roller 301A of the first-stage rolling mechanism is rolled. The electrode plate 2 to be rotated is driven to move downward. The drive-side rolling rollers 301B, 301C, and 301D of the second and subsequent rolling mechanisms 3B, 3C, and 3D are connected to the driving-side rolling roller of the previous-stage rolling mechanism via the chain sprocket mechanism 4, The rotation of the drive-side rolling roller 301A of the first rolling mechanism is sequentially transmitted to the rolling roller of the subsequent-stage rolling mechanism, so that each driving-side rolling roller is rotationally driven in the same direction.

  Further, among the drive-side rolling rollers of adjacent rolling mechanisms, the peripheral speed of the drive-side rolling roller of the subsequent-stage rolling mechanism is n (> 1) times the peripheral speed of the drive-side rolling roller of the preceding-stage rolling mechanism. In addition, the number of teeth of the sprocket wheel of each chain sprocket mechanism 4 is set. In the present embodiment, among the adjacent rolling mechanisms, each of the peripheral speeds of the driving-side rolling rollers of the subsequent-stage rolling mechanism is 1.6 times the peripheral speed of the driving-side rolling rollers of the preceding-stage rolling mechanism. The number of teeth of the sprocket wheel of the chain sprocket mechanism 4 is set. Therefore, when the peripheral speed of the rolling roller 301 of the first stage rolling mechanism 3A is V, the peripheral speeds of the rolling rollers 301B, 301C, and 301D of the second stage, third stage, and fourth stage rolling mechanism are 1.6. × V, 2.56 × V, and 4.1 × V.

  The driven side rolling rollers 303A to 303D of the rolling mechanisms 3A to 3D are rotationally driven by frictional contact with the corresponding driving side rolling rollers when there is no electrode plate between the corresponding driving side rolling rollers 301A to 301D. When there is an electrode plate between the driving side rolling roller to be rotated, it is driven to rotate by frictional contact with the electrode plate.

  In the process of manufacturing the lead-acid battery electrode plate, when a defective product is produced after the aging and drying steps of the active material, the electrode plate 2 of the damaged product is supplied to the rolling apparatus 1 shown in the drawing and rolled. . When the electrode plate 2 for a lead storage battery is rolled, the portion of the grid of the electrode plate is made of lead or a lead alloy and is stretched without being broken because it is rich in ductility and malleability. On the other hand, since the active material which has been aged and dried can hardly be deformed, when it is rolled, it is in a state of being crushed into pieces, almost completely falling off from the lattice, and separated from the lattice.

  In this embodiment, since it is comprised so that the peripheral speed of the rolling roller of several rolling mechanism 3A-3D may become high sequentially, the pulling force is applied to the electrode plate 2 which passed each rolling mechanism from the rolling mechanism side of the next stage. The electrode plate is stretched thinly by this pulling force. Therefore, the electrode plate to which the solidified active material is adhered can be rolled without difficulty and rolled to a sufficiently thin thickness without destroying the lattice, and the active material can be reliably separated.

  In the above example, a plurality of rolling mechanisms are arranged, but the rolling device 1 only needs to include at least one rolling mechanism, and the number of rolling mechanisms constituting the rolling device is arbitrary.

  In the above example, a plurality of rolling mechanisms are arranged in the vertical direction and rolled while moving the electrode plates in the vertical direction. However, the parallel arrangement direction of the plurality of rolling mechanisms is arbitrary. These rolling mechanisms may be arranged in the horizontal direction and rolled while moving the electrode plate in the horizontal direction.

(A) is the front view which showed schematically the structural example of the rolling apparatus used by embodiment of this invention, (B) is the left view of the rolling apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling apparatus 2 Electrode plate for lead acid batteries 3A to 3D Rolling mechanism 301A to 301D Driving side rolling roller 302A to 302D Pressure spring 303A to 303D Driven side rolling roller

Claims (4)

After the active material mainly composed of lead oxide is applied to a grid made of lead or a lead alloy, the material constituting the grid is formed from an electrode plate for a lead storage battery prepared through an aging and drying process. It is a grid body recovery method of the electrode plate for the lead storage battery to be recovered,
A grid of lead-acid battery plates, wherein the active material is pulverized and separated from the grid body by rolling the lead-acid battery electrode plate, and the material constituting the grid body is recovered. Body recovery method. After the active material mainly composed of lead oxide is applied to a grid made of lead or a lead alloy, the material constituting the grid is formed from an electrode plate for a lead storage battery prepared through an aging and drying process. It is a grid body recovery device for an electrode plate for a lead storage battery to be recovered,
Comprising a rolling device for rolling an electrode plate for a lead storage battery from which the lattice body is to be recovered;
The active material fixed to the grid body of the electrode plate is pulverized and separated from the grid body by rolling the electrode plate from which the grid body is to be recovered by the rolling device. A grid plate recovery device for a lead-acid battery electrode plate. The rolling apparatus includes a plurality of rolling mechanisms composed of a pair of rolling rollers that roll while moving in one direction with an electrode plate to be collected in between,
The plurality of rolling mechanisms are arranged in a row with the same moving direction of the electrode plates to be rolled, and are configured to roll the electrode plates to be collected in multiple stages. ,
The grid body collection | recovery apparatus of the electrode plate for lead acid batteries of Claim 2 characterized by these.   The peripheral speed of each rolling roller of the plurality of rolling mechanisms is set so that the peripheral speed of the rolling roller of the rolling mechanism arranged on the rear stage side is faster than the peripheral speed of the rolling roller of the rolling mechanism arranged on the front stage side. The grid body collection | recovery apparatus of the electrode plate for lead acid batteries of Claim 3 characterized by the above-mentioned.

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