JPH0212758A - Lead storage battery - Google Patents

Abstract

PURPOSE:To make it possible to suppress the corrosion and the deterioration of a connecting body by composing the connecting body for electrode plates using lead alloy grids including calcium, with a nonantimony, noncalcium lead alloy, while the connecting body for electrode plates using lead alloy grids including antimony, with a noncalcium alloy. CONSTITUTION:As a connecting body 11 to compose a strap 9 of cathode plates 6 which furnish grids consisting of a lead alloy including antimony, and as an alloy of additional lead when such an additional lead is used, an alloy of lead + antimony is used. And a connecting body 12 to compose a strap 10 of anode plates 7 which furnish grids consisting of a lead alloy including calcium, and an alloy of additional lead when such an additional lead is used, are composed of an alloy of nonantimony and noncalcium lead alloy. As a result, a burning-out of wire between grids and straps, straps and the connecting body, or at the connections to connect between cells is prevented, and moreover, the mechanical strength is also increased to prevent breaking of wire owing to a vibration and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention aims to improve the reliability of the connections between cells of lead-acid batteries, and in particular suppresses corrosion and deterioration of the connections that occur under conditions such as high temperatures and over-discharging. It is something to do.

Conventional lead-acid batteries have been made maintenance-free (MF) due to the complexity of inspection and maintenance of the electrolyte, and this is still the case today. Among these, as a method for improving self-discharge and liquid reduction characteristics, batteries using non-antimony lead alloy grids for the anode and cathode have been put into practical use. However, since non-antimony has weak mechanical strength and does not have the strength to hold the active material, it has become common to create a lattice containing calcium or tin alloy, and MF type storage batteries are made of lead + calcium + tin alloy. It has come to refer to batteries that use grids as anode and cathode grids.

Lead-acid batteries that use this lead + calcium + tin alloy for the lattice have the disadvantage that the lattice gradually stretches and the active material falls off due to deep charging and discharging, and also has the same disadvantages as above even at high temperatures. The so-called hybrid type lead uses a conventional lead + antimony alloy lattice for the anode plate and a lead + calcium + tin alloy lattice for the cathode plate so that there is less elongation even if the performance is slightly degraded. This led to the commercialization of storage batteries. This battery uses a lead + antimony alloy for the grid of the anode plate, so although it corrodes during deep charging and discharging, it does not elongate, making it a relatively strong battery. However, since it is made up of no-brid plates, this strap may use a connecting body made of a lead ten-antimony alloy, only lead, or a connecting body using a lead + calcium alloy. was sometimes used.

Problems to be Solved by the Invention A connecting body using a lead+antimore alloy melts with the calcium alloy in the cathode lattice during formation of the cathode strap to form a ternary alloy of lead+antimony+calcium. This alloy suffers from severe corrosion, and when left in a high-temperature, weakly acidic, oxygen atmosphere, the problem is that melting and corrosion progress, leading to wire breakage.

In addition, connecting bodies made of non-calcium and non-antimony alloys are soft and have the disadvantage of breaking when used in applications where high vibrations are applied.

In addition, when a connecting body using a calcium alloy is used, it is mixed with antimony in the anode plate lattice, and the cathode strap becomes a ternary alloy, resulting in a similar problem.

The present invention is directed to a so-called hybrid battery in which a lead + antimony alloy is used for the anode grid and a calcium alloy is used for the cathode grid, as described above, in which connections between the grid and the strap, between the strap and the connection body, or between the cells are caused by corrosion or melting of the connecting body. The purpose is to provide on the market a single-fried lead-acid battery that prevents wire breakage at the connection portion where the wires are connected, has high mechanical strength, and has a connection portion that does not break due to vibration or the like.

Means for Solving the Problems Therefore, the present invention focuses on the alloy of the connecting body, and focuses on the connecting body that constitutes the strap of the anode plate equipped with a lattice made of antimony-containing lead alloy, or when using additional lead, the alloy of the connecting body. The alloy also uses a lead + antimony alloy for the connections that make up the straps of the cathode plate with the LA-calcium-containing lead alloy grid, or if additive lead is used, this additive lead alloy is non-antimony.

It is composed of a non-calcium lead alloy.

In other words, since the lattice of the anode plate is made of a lead+antimony alloy, the strap is constructed using an alloy that is the same as the lead+antimony alloy for both the anode connector and the additional lead. Since the same alloy is used, weldability is good, and since there is no difference in the alloy between the grid and the strap, and between the strap and the connecting body, there will be no surface corrosion or melting even when exposed to high temperatures, weak acids, or neutral oxygen atmospheres. Since it takes time for the central part to be eroded, it is possible to satisfy the function without breaking the wire during the life of the battery.

In addition, since the strap part is formed from a grid or connecting body of the same quality and additional lead, it is extremely easy to work with, and since it is made of an antimony + lead alloy, it has strong mechanical strength and has the ability to withstand equipment subject to high vibrations. It is.

Next, regarding the cathode strap, the lattice of the cathode plate is made of a calcium + lead alloy that does not contain antimony, and the connecting body and additional lead are made of a non-calcium, non-antimony lead alloy. Since the connecting body and the lead alloy of the additional lead are melted to form the strap, antimony and calcium alloy are not mixed in, and the strap has high corrosion resistance, and under various conditions, it will not corrode or melt and lead to disconnection. There isn't. Also, the connecting body is non-calcium,
With non-antimony alloys, the straps form an intermixed alloy layer with the calcium-lead alloy in the grid. Next, an anode connector made of an antimony/lead alloy and a cathode connector made of a non-antimony, non-calcium+lead alloy are placed so that the partition walls between the cells face each other, and both are connected at the partition through-hole. The inter-cell connection is completed by fusion joining using arc welding or resistance welding. Antimony from the anode connection body is melted and mixed in this welded part, but since the cathode connection body is non-calcium, neither of them is mixed.

In other words, since a ternary alloy layer of lead, antimony, and calcium is not formed, the welded part will not corrode or melt and cause wire breakage.

Furthermore, since the anode connector uses an antimony-lead alloy, the cathode connector has high mechanical strength and practical performance even if it is a non-antimony, non-calcium lead alloy.

EXAMPLES Hereinafter, the present invention will be explained with reference to the drawings. FIG. 1 is a sectional view of a lead-acid battery according to an embodiment of the present invention. In the figure, 1 is a battery case, 2 is a partition wall, and 3 is a through hole opening in the partition wall 2. As shown in FIG. 4 is a lid, 5 is a terminal, 6 is an anode plate using a lattice made of lead + antimony alloy, 7 is a cathode plate using a lattice made of lead + calcium alloy, 8 is a separator made of synthetic resin, etc., 9 is an anode An anode strap that connects multiple plates; 1o is a cathode strap that connects multiple cathode plates;
11 is an anode connecting body joined to the anode strap, and 12 is a cathode connecting body joined to the cathode strap. Also 13
is a joint where the anode connector 11 and the cathode connector 12 are fused and joined at the through hole 3 of the partition wall 2. Further, 14 is an electrode plate group or element consisting of an anode plate 6, a cathode plate A, and a separator 8.

Next, a method of configuring this battery will be described.

First, a plurality of anode plates e are connected, and the anode grid 6 made of a lead + antimony alloy and the anode connection body 11 are made of a homogeneous alloy, and the anode strap 9 is constructed using lead or the like. do. That is, the anode grid 6, the anode strap 95. The anode connector 11 is composed of a homogeneous lead + antimony alloy. Since the three parts are made of the same material, corrosion or dissolution is unlikely to occur even in a high temperature, weakly acidic or neutral oxygen atmosphere. , there will be no disconnection during practical use. Next, on the cathode side, the cathode grid 7 of the cathode plate made of a lead-ten calcium alloy and the cathode connecting body 12 made of a non-calcium, non-antimony lead alloy are joined via the cathode strap 1o. , this cathode strap 1o is formed using non-antimony, non-calcium lead, etc., which is close to and compatible with the cathode grid 7 and the cathode connector 12 in the alloy phase. Lead has poor corrosion resistance and poor dissolution resistance, as alloys may be mixed in, but antimony alloys cannot.

Since it is not a ternary alloy consisting of antimony and calcium, it forms a corrosion-resistant and melt-resistant connection.

Next, a through hole 3 is opened to each cell in the partition wall 2 of the battery case 1.
The bipolar connectors are made to face each other, and the anode connector 11 and the cathode connector 12 are melted and joined at the through hole 3 using arc welding or resistance welding. The anode connector 11 is made of a lead + antimony alloy, and the cathode connector 12 is made of a non-antimony, non-calcium lead alloy, so the joint 13 is made of an antimony + lead alloy, but since it is non-calcium, the ternary alloy is It is possible to configure the connection portion 13 which has excellent corrosion resistance and melting resistance without causing corrosion.

The effects of the battery of the present invention have been described above, but in order to clarify the effects of the present invention more specifically, the following tests were conducted using an Nso type battery.

As shown in Figure 2, the anode connector 11 and the anode strap 9 are made of lead + antimony alloy, and the cathode connector 12 and the cathode strap are made of non-calcium, non-antimony lead alloy, and the anode and cathode connectors are made of lead. Vibration resistance tests were conducted on four types of batteries, one using a lead + antimony alloy and the other using a lead + calcium alloy for the anode and cathode connectors. Vibration was continuously applied at each G (acceleration) for 8 hours to confirm vibration resistance. As shown in Figure 2, lead alone does not have 4GL and does not have practical performance, but the present invention has vibration resistance almost close to that of lead + antimony alloy, and strong vibrations (up to sG) occur. It has features such as being able to be used for applications and equipment.

Also, as shown in Figure 3, the anode, cathode grid, and connecting body are made of antimony alloy, and the strap has a so-called ternary alloy containing lead, antimony, and calcium alloy, but Battery C and a battery with a strap made only of antimony alloy When we conducted a 40℃ Dorkle life test on battery A and battery B consisting of a non-antimony, non-calcium lead strap, we found that batteries A and B had no problems with their straps even after 14 months had passed and had a long service life. However, batteries with C ternary alloy straps expired in about 6 months. When the cause was investigated, it was found that the wire had broken due to corrosion of the strap.

Effects of the invention As described above, it has been found that there are practical problems when the strap part is made of a ternary alloy consisting of calcium, antimony, and lead/gold, but according to the present invention, it must not be mixed into the bipolar plate and the grid. In a battery having an alloy, calcium and antimony/alloy are mixed only in the connecting portion between the two, and it has extremely high practical value.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of the battery of the present invention, FIG. 2 is a diagram showing the results of a vibration resistance test, and FIG. 3 is a diagram showing the results of trickle life characteristics. 6... Anode plate, 7... Cathode plate, 9...
...Positive strap, 10...Negative strap, 11...Anode connection body, 12...
Cathode connection body. ! -1- -1- 3・-4-・S ・・6-・- −−18-・・t Fuku-naka partition wall Nakasumi-ka i-dori,) Positive i cover is mold lattice dead palator 11-positive f! Fff# (element) Foil figure 9r, Hunting resistance test result of battery using separate dispersion body ○! ! As soon as possible, mix together 1) 25°C 02c (closed)

Claims (2)

[Claims] (1) A lead alloy grid in which an antimony-containing lead alloy grid and a calcium-containing lead alloy grid are used as either the anode plate or the cathode plate, and elements made of the same polar plates are connected to each cell. A lead-acid battery in which the connecting body is made of a non-antimony and non-calcium lead alloy for the electrode plate using a calcium-containing lead alloy grid, and a non-calcium alloy for the electrode plate using an antimony-containing lead alloy grid. (2) A lead-acid battery according to claim 1, in which a connecting body made of a non-antimony, non-calcium lead alloy and a connecting body made of a non-calcium lead alloy are welded at the through-hole portion of the partition wall of each cell.