JPH047069B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a battery equipped with a spiral plate group.

Conventional technology and its problems In a cylindrical battery, the areas of the positive and negative plates are widened so that a large discharge current can be extracted, the positive plate is sandwiched between the negative plates with a separator in between, and the plates are wound spirally. This has been practiced for a long time.

However, conventional batteries have a single-cell structure, and in order to obtain a voltage higher than the single-cell voltage, it is necessary to connect multiple batteries in series, which results in a large and complicated shape and weak strength. There was a problem.

Means for Solving the Problems The present invention provides a battery equipped with a spiral electrode plate group.
A cell is created by sandwiching both sides of a positive electrode plate with a separator between two negative electrode plates whose surfaces other than those facing the positive electrode plate are covered with an insulating material, and these cells are connected in series and wound into a spiral. It is characterized by having a group of shaped electrode plates. In addition, this battery is characterized in that the parts where the negative electrode plates of the same cell touch each other when rolled up are electrically connected, and the parts where the negative electrode plates of adjacent cells touch each other are coated with an insulating coating. shall be.

Effect By having the above configuration, it is possible to obtain a battery that generates a voltage corresponding to an arbitrary number of cells of two or more cells.

In the present invention, the negative electrode plate is coated with an insulating material except for the surface facing the positive electrode plate, but if it is not coated and wound up in a spiral, the negative electrode plate located at the outermost periphery of the first cell and the second cell This is because the negative electrode plates of adjacent cells, such as the negative electrode plate located at the innermost periphery of the eye, come into contact with each other, causing the negative electrode plates of the cells to become short-circuited, making it impossible to obtain the desired voltage.

On the other hand, if the negative electrode plates of the same cell are rolled up and overlap and come into contact with each other, not only will there be no negative effects, but by bringing them into electrical contact, the current distribution within the electrode plate will be made more uniform, and the voltage will be stabilized. be able to. Therefore, it is preferable that the portions where the negative electrode plates contact each other within the same cell when rolled up are electrically contacted, and the portions where the negative electrode plates contact each other between adjacent cells are provided with an insulating coating.

Example The present invention will be explained below using preferred embodiments.

FIG. 1 shows an embodiment in which the present invention is applied to a seawater battery. Both sides of a positive electrode plate 1 made of a silver chloride plate are sandwiched between negative electrode plates 3 made of a magnesium plate with a separator 2 in between. One end of the positive electrode plate is exposed a little more than the negative electrode plate and connected to the negative electrode plate of the second cell. For connection, use eyelets 4 or rivets. If the positive electrode plate and the negative electrode plate are brought into direct contact, the negative electrode plate will be corroded, so a corrosion-resistant conductive plate (not shown) such as silver foil is inserted between the two. The positive electrode plate of the second cell is sandwiched between the negative electrode plates of the second cell with a separator interposed therebetween. Assemble the required number of cells in the same manner. Next, it is wound up as shown in FIG. 2, centering around the winding core 5. Attach leads 6 to the negative electrode plate of the first cell and the positive electrode plate of the last cell, and place them in the case 7 to complete the process. Note that the part of the negative electrode plate other than the part facing the positive electrode plate does not participate in the electrode reaction, and if the negative electrode plates of adjacent cells come into contact, a short circuit current will flow and the desired performance will not be obtained. The parts that do not face each other are insulated using insulating tape 8 or the like. However, when it is rolled up into a spiral, there are places where the two negative electrode plates of the same cell come into contact with each other. By leaving this area conductive without applying an insulating coating, it is possible for the current generated in one negative plate to flow through the conductive part to the other negative plate. Therefore, there is no voltage difference between the two negative plates, and the electrode reaction proceeds at the same speed on both the front and back sides of the positive plate. Even in the event of poor contact, current can be extracted through the remaining negative electrode plate, which is effective in stabilizing battery performance.

The separator may be anything that can prevent contact between the positive and negative plates and supply the electrolyte, but a thin string-like separator with electrical insulation properties, such as a thread, can be used to separate the positive and negative plates. By using a wrapped separator, when the electrolyte is injected into the battery, the electrolyte can be injected smoothly and unevenly injected, and the gas generated by the discharge reaction can be quickly discharged. Therefore, it is ideal for applications that require the battery to start up quickly when electrolyte is injected, or for batteries that generate a lot of gas during discharge, and is easy to manufacture because it is wound around the positive electrode plate. There is no risk of it falling off during manufacturing or use, and performance deterioration due to short circuits between the positive and negative electrode plates can be prevented.

Effects of the Invention As described above, the battery according to the present invention has a group of electrode plates in which a plurality of electrode plates with a large area are spirally connected in series, and the positive electrode plate has a structure in which both sides face the negative electrode plate. . Therefore, it is possible to provide a small battery that generates a voltage corresponding to an arbitrary number of cells of two or more cells and exhibits good performance even when used at a large current.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a spiral plate group of a battery according to the present invention, and FIG. 2 is a cross-sectional view of the battery according to the present invention. 1...Positive electrode plate, 2...Separator, 3...Negative electrode plate, 5
... Winding core, 8... Insulating coating.

Claims (1)

[Claims] 1 A cell is created by sandwiching both sides of a positive electrode plate between two negative electrode plates whose surfaces other than those facing the positive electrode plate are covered with an insulating material via a separator, and a plurality of cells are connected in series. A battery with a group of spirally wound electrode plates. 2. Claim 1 characterized in that the parts where the negative electrode plates of the same cell come into contact with each other when rolled up are electrically contacted, and the parts where the negative electrode plates of adjacent cells come into contact with each other are coated with an insulating coating. Batteries listed. 3. The battery according to claim 1 or claim 2, characterized in that a thin string-like material having electrical insulation properties, such as thread, is wound around the positive electrode plate and used as the separator.