JP2012043670A - Slope correction member of connection box for storage battery terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a member capable of performing connection with low contact resistance without adjusting deviated heights and positions of a plurality of storage batteries when connecting terminals of the storage batteries.SOLUTION: Two members used for connecting a terminal of a storage battery and a connection box by a bolt are formed into a disk-like shape so that a recess part is provided on an undersurface and a flat surface is provided on a top surface of one member, and that a convex part is provided on a top surface and a flat surface is provided on an undersurface of the other member. The two members are inserted between the terminal and the connection box so that the recess part faces the convex part. When the connection box is tightened to the terminal by the bolt, the upper member is tilted due to sliding on the recess and convex surfaces in proportion to a slope of the connection box caused by a height difference between the terminals. Therefore, contact surfaces between the connection box and the members are corrected and paralleled, and contact areas can be widely and uniformly secured, thereby reducing a contact resistance and achieving its long-term stability.

Description

The present invention relates to a correction member for a contact portion with respect to the inclination of a connecting rod connecting between terminals of adjacent storage batteries.

  A storage battery, for example, a stationary lead storage battery used as an emergency power source, is used by connecting a large number of lead storage batteries in series or in parallel. For the connection of the storage battery, a plate-shaped connection rod made of a conductive metal having opening holes at both ends is usually used, and this is passed between the top surfaces of the storage battery terminals adjacent to each other, and an opening hole is formed in each terminal. It connects by fastening the bolt which penetrates with a nut.

  In this case, if there is a variation in the height of the terminals of the storage battery, a stand on which the storage battery is installed, or a deviation in the height or position at the time of installation in the adjacent storage battery, as shown in FIG. An inclination occurs in the connecting rod 4. FIG. 3 (a) is a diagram of the case where the connecting can 4 is contacted and connected to the top surface of the terminal 6 of the storage battery 3. When the height of the storage battery is shifted, the bolt 5 is connected to the terminal 6 of the storage battery 3 in this state. When the connecting can 4 is fastened to the terminal 6 by screwing into a nut (not shown) formed in the top face of the battery, the contact surface between the top face of the terminal 6 of the storage battery 3 and the connecting can 4 is parallel. Therefore, the contact is localized, the contact area is decreased, the contact resistance is increased, or the connection rod is deformed in the long term, and the contact resistance increases with time, which is not preferable.

FIG. 3 (b) is a diagram of the case where the connection can 4 is abutted and connected to the side surface of the terminal 6 of the storage battery 3. When the position of the storage battery is shifted (up and down on the paper surface), the same A situation arises and a similar problem arises. In FIG. 3B, reference numeral 7 denotes a nut. In addition, when one storage battery has two terminals 6, it is a positive / negative terminal, and when the storage batteries are connected in series, when the terminal of one storage battery is a positive terminal, the other connected to this by a connecting rod The storage battery terminal is a negative terminal. Similarly, in FIG. 3 (a), one storage battery has two terminals, but is omitted from the drawing.

  In order to solve this problem, Patent Document 1 proposes to interpose a braided wire between a terminal of a storage battery and a connecting rod connected to the terminal.

JP 2003-197173 A

  However, when a braided wire is interposed, there are the following problems. That is, when the braided wire is used for the connecting portion, even if the internal structure is uniform, the structure becomes non-uniform at the time of deformation, and the braided wire is crushed by the tightening force of a bolt or the like and contributes greatly to conductivity. , There is a part that does not deform without receiving force and does not contribute much to conductivity, and there is a limit to reduction of contact resistance

The present invention has been made to solve these problems. The first member has a top surface formed in a plane and the bottom surface formed in a spherical concave surface, the top surface formed in a spherical convex surface, and the bottom surface formed in a plane. The second member is made, and these two members are fitted to face each other on the concave and convex surfaces, and when the storage battery terminal and the connecting rod are fastened, the two fitted members are interposed therebetween. It is characterized by that.

  In this way, by interposing a member fitted with an uneven surface, even when the connection terminal is inclined and fastened due to a difference in the height or position of the storage battery terminal, it fits according to the inclination. Since the uneven surface thus slid in a circular arc shape, the first member contacts the lower surface of the connection terminal inclined in parallel with the lower surface of the connecting cantilever whose upper surface is inclined, and at the same time, the lower surface of the second member contacts the upper surface of the storage battery terminal. It can be held in parallel and brought into contact. As a result, a straightening member that can ensure and maintain a good contact between the connecting pin and the terminal even in the inclined connecting pin is constituted. As a result, the contact between the connecting pin and the terminal becomes localized due to the inclination of the connecting pin and the contact resistance increases, or the fastening force becomes non-uniform and unstable over the long term and the contact resistance increases. Can be prevented.

  Note that the difference in the inclination and contact state of the connection can be caused by the design tolerance of the storage battery and the terminal part, the installation position or the inclination of the installation base, but the above-mentioned sliding by the first member and the second member. The correction effect by can be obtained in exactly the same way.

  According to the present invention, it is possible to secure a sufficient contact area between the terminal and the connection cane even if the connection cane is passed between the storage battery terminals having different heights, and the contact can be made at the connection part. The resistance can be lowered and the effect of preventing the increase can be achieved.

The figure which shows the inclination correction member of this invention. The front fragmentary figure which shows the connection state of the storage battery terminal using the inclination forced member of this invention. It is a figure which shows the connection part of the conventional storage battery terminal, (A) is a front fragmentary view which shows the connection state when connecting a connecting rod to the top surface of the terminal, and (B) is when connecting the connecting rod to the side surface of the terminal The top view which shows the connection state of.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram of an embodiment of the present invention. FIG. 1A is a plan view of the first member 1. As shown in the drawing, the first member 1 has a disk shape. FIG. 1 (b) is a front view of the first member. As shown in the drawing, the upper and lower surfaces of the first member 1 are formed with a flat upper surface 11 and a lower surface formed into a spherical concave surface 12 by cutting. Has been. FIG. 1 (c) is a front view of the second member 2. As shown in the figure, the upper surface 21 is formed into a spherical convex surface by cutting on the upper and lower surfaces facing each other, and the lower surface is a flat surface. It is. FIG. 1 (d) is a plan view of the second member 2, and has a disk shape like the first member 1. The spherical concave surface of the lower surface 12 of the first member 1 and the spherical convex surface of the upper surface 21 of the second member 2 have the same radius of curvature and are fitted and slidably contacted with each other without any gap.

  The outer diameters of the first member 1 and the second member 2 are usually the same and are made as large as possible from the point of contact resistance, but can be appropriately selected depending on the size of the storage battery. However, if the diameter of the member is smaller than usual or if the inclination of the connecting rod is large, either one of the member outer diameters is made larger than the other member to reduce the contact area caused by displacement of the member due to sliding. It is desirable to prevent.

The first member 1 has a fastening bolt insertion port 13 formed in a circular, oval or elliptical shape larger than the bolt diameter, and the second member 2 has a circular shape approximately the same as the bolt diameter. The insertion port 23 is formed. As a result, only the first member 1 that comes into contact with the connection can be slid and moved, so that it is easy to fasten the bolt in the vertical direction, and the second member 2 is displaced from the terminal. Can be prevented.

  FIG. 2 is a diagram showing the usage pattern. The lead storage batteries 3 and 3 arranged adjacent to each other are composed of a battery case containing an electrode plate group and an electrolytic solution and a lid of the battery case, and the top surface is horizontal as is usually the case on the top surface of the lid. The terminal 6 is formed so as to protrude. In the lead storage battery 3, positive and negative terminals are formed, but only one of them is shown and the other is omitted. The first and second members 1 and 2 and the connecting rod 4 facing each other according to the present invention are placed on the top surface of the terminal 6, and the fastening bolt 5 is opened from above to the opening hole of the connecting rod 4 and the first and second members. The connecting rod 4 is connected by being screwed and tightened into a female screw hole 7 as a nut formed in the top surface of the terminal 6 through the insertion opening of the members 1 and 2. The other end of the connecting can 4 is similarly attached to the terminal 6 of the adjacent lead storage battery 3 to connect the lead storage batteries 3 to each other.

  At this time, in any terminal 6, the flat lower surface of the second member 2 is brought into contact with the top surface of the terminal 6, and the flat upper surface of the first member 1 is brought into contact with the lower surface of the connection can 4. The spherical concave surface on the lower surface of the first member 1 and the spherical convex surface on the upper surface of the second member were fitted to each other. As a result, even if a difference in height occurs in the horizontal direction between the lead storage batteries 3 and 3 due to a design tolerance or the like, and the inclination of the connecting rod 4 occurs, the first member 1 and the spherical concave surface and the spherical convex surface are fitted to each other. The second member 2 is in sliding contact with each other, and the connection member 4 and the first member 1, the first member 1 and the second member 2, and the second member 2 and the terminal 6 are uniformly in surface contact. It becomes a contact state. And the uniform connection between storage battery terminals can be achieved by fastening the fastening bolt 5.

  The outer diameter of each of the above members is such that the first member 1 has a disk shape with a diameter of 30 mm and a peripheral side portion thickness of 5 mm, and a spherical concave surface with a curvature radius of 170 mm formed on the lower surface thereof, and the second member 2 Is a disk having a diameter of 30 mm and a thickness of 2 mm on the peripheral side, and a spherical convex surface having a curvature radius of 170 mm is formed on the upper surface thereof. The diameter of the storage battery terminal is 28 mm. If the dimensions of these radii of curvature are the same outer diameter, the shape of the opposing concavo-convex surface can easily absorb the difference in the battery terminal height when the radius of curvature (R) is small, but the sliding distance becomes small. Conversely, when R is large, the difference in height is difficult to absorb, but the sliding distance is easy to take.

In the said usage form, the diameter of the fastening bolt fastened to a terminal is 10 mm, the insertion port of the 1st member 1 is 13 mm in diameter, and that of the 2nd member 2 is 11 mm in diameter. The opening hole of the connection can 4 has a diameter of 13 mm.

  Each of the first and second members is made of a conductive material such as brass, lead-plated copper, or a copper alloy, and the uneven surface can be formed by cutting, pressing, casting, or the like.

  The connection can 4 is made of brass, copper plated with lead or copper alloy, and is formed in a strip shape having opening holes at both ends thereof.

  As described above, as shown in FIG. 2, when there is a difference in the height of the storage battery terminal or an angle difference due to the design tolerance of the storage battery or the size or assembly of the storage battery mounting base, the first member 1 Slides on the mating contact surface with respect to the second member 2 to cause a positional deviation in an arc shape, and the upper surface of the first member 1 becomes a contact surface parallel to the connection rod. The member 2 in this case has a contact surface parallel to the terminal on the lower surface plane.

  Accordingly, since the fastening force to the terminal and the connecting canal is evenly distributed without causing deformation of the member and the connecting cane, an even connection can be made over a wide area, and the braided wire described in the cited document 1 is used. Since the non-uniformity of the fastening force that occurs in this case can be avoided, the contact resistance can be lowered, and an increase in the resistance value when used for a long time can be suppressed.

  In the above description, an example in which a female screw hole of a bolt is formed in the terminal and the bolt is fixed to the connection pin by fixing the bolt to the terminal is shown. However, the present invention is not limited to this, and the bolt is formed in the terminal. Alternatively, a method may be used in which a member or a connecting rod is inserted into this and fixed with a nut.

  In addition, as described above, the surface state of the concavo-convex portion of each member is made as smooth as possible to reduce the contact resistance of the sliding portion, but in order to further ensure its electrical stability, a conductive and corrosion-resistant lubricant or It is also possible to apply a small amount of rust inhibitor.

  Further, in the present embodiment, each member has been described as a disk shape, but the external shape is not limited to this, and may be a rectangle or a polygon. Can be selected.

  Moreover, contrary to the above-mentioned usage pattern, the first member may be arranged on the terminal side, and the second member may be arranged on the connecting rod side. The interrelationship between the insertion port and the like should be the same.

  Moreover, in the said usage form, even if the first member and the second member are both 30 mm in diameter and larger than the terminal diameter and the contact area between the members due to sliding of the member decreases, the contact area with the terminal However, if the diameter of the first member is larger than that of the second member, for example, 32 mm, the contact area between the members due to the sliding of the member may not be reduced to some extent. I can do it.

  Furthermore, the inclination correction member consisting of the first member and the second member of the present invention is connected to a side surface of a storage battery having a flat terminal as shown in FIG. Moreover, it can be similarly arranged and used between the terminal and the connecting can.

  By using the present invention, even when the heights of the terminals of the adjacent storage batteries are different, the step can be absorbed and the connection can be attached, so that a connection method with low contact resistance can be realized.

1 First member 2 Second member 3 Storage battery (lead storage battery)
4 Connection rod 5 bolt (fastening bolt)
6 Terminal 7 Nut (Female thread)

Claims (1)

In the inclination correcting member of the connecting terminal for the storage battery terminal used between the connecting canister for connecting the storage batteries and the storage battery terminal, the inclination correcting member has a top surface formed in a flat surface and a bottom surface formed in a spherical concave surface. Inclination correction of a storage battery terminal connecting rod, wherein one member and a second member having an upper surface formed into a spherical convex surface and a lower surface formed into a flat surface are arranged with the uneven surface facing each other. Element.

Images