Lead battery welding method and apparatus专利检索-铅屏蔽防辐射专利检索查询-专利查询网

Lead battery welding method and apparatus

阅读：993发布：2022-04-24

专利汇可以提供Lead battery welding method and apparatus专利检索，专利查询，专利分析的服务。并且A welding method for fusing lead components together in a leadcontaining electrochemical cell is disclosed together with apparatus for carrying out the method. The method includes forming an ingot-like mold around the lead components to be welded, the walls of the mold being comprised of a material having a high softening point, good thermal conductivity and arcerosion resistance. Arc welding of the components utilizing an inert-gas-shield nonconsumable electrode, e.g. tungsten, is accomplished by passing the electrode over a weldable surface formed by the lead components in an oscillating path at a controlled speed and welding current to permit the lead components to melt and flow into the ingot-like mold while simultaneously controlling heat transfer through the adjacent mold walls. The resultant weld is of low internal impedance and is relatively thick for increased oxidation and corrosion resistance during operation of the battery.，下面是Lead battery welding method and apparatus专利的具体信息内容。

权利要求

1. A method for welding together thin lead current collector tabs to a lead post of high heat capacity relative to the collector tab all contained within a lead-acid electrochemical cell, without the use of flux to produce a low impedance, intracell corrosion resistant weld, comprising: a. bringing the thin lead current collector tab(s) into close relative proximity to the lead post to form a weldable surface; b. forming an ingot-like mold at least substantially surrounding and forming walls about the periphery of said weldable surface, said walls comprised of a metal having a softening point well about the softening point of lead, good thermal conductivity, and refractory enough to be resistant to erosion caused by welding arcs; c. arc welding said lead components utilizing an inert-gasshielded nonconsumable electrode by passing the electrode over said weldable surface in an oscillating path at a welding current, speed and oscillation amplitude sufficient to cause said lead components to flow together, the flow being contained by the walls of the ingot-like mold; and d. rapidly causing said flow to solidify from its periphery inwardly by heat transfer through said walls.

2. The method of claim 1 wherein the current collector tabs having a thickness in the range of about 20-40 mils.

3. The method of claim 1 wherein said nonconsumable electrode consists essentially of tungsten or an alloy thereof.

4. The method of claim 1 wherein the walls of said ingot-like mold are formed essentially of tungsten.

5. The method of claim 1 wherein said arc welding step is conducted in an essentially non-oxidizing atmosphere.

6. The method of claim 1 wherein said oscillation speed is from about 60 to about 2,400 strokes per minute.

7. The method of claim 1 wherein the speed of oscillation is from about 400-1,200 strokes per minute.

8. The method of claim 1 wherein the impedance of the weld is less than one milliohm.

9. The method of claim 1 wherein said weldable surface is defined by a length in the longitudinal direction of the welding path, and a width, the amplitude of said welding path corresponding substantially to said width of the weldable surface.

10. The method of claim 9 wherein said oscillating path is substantially sinusoidal.

11. The method of claim 1 wherein the metal walls have a thermal conductivity of at least about 0.12 cal/cm2/cm/* C/sec.

12. The method of claim 11 wherein said arc welding step is accomplished by initially starting the arc at a relatively high current short of said weldable surface, followed by lowering the welding current well below the start-up current value, and then passing the electrode ovEr said weldable surface at the reduced current.

13. The method of claim 12 wherein the lower current value is sufficient to melt the lead components and cause them to readily flow within the mold, but not so high as to cause burning of the flowing lead.

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