Battery sheath made of formed cold-rolled metal sheet and method for producing battery sheaths
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A metal plate and battery technology, which is applied in the direction of battery box/cover, battery box/cover material, battery pack parts, etc., can solve the problems of expensive and complicated methods
Inactive Publication Date: 2004-10-13
HILLE & MUELLER
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[0043] Example 1
[0044] After degreasing, cleaning, pickling and cleaning, nickel-plate the 0.2-0.45mm thick strip in the nickel bath as follows:
[0045] Nickel bath composition:
[0046] Nickel 60g / l (nickel sulfate)
[0047] Chloride 30g / l (nickel chloride)
[0048] Boric acid 40g / l
[0049] Graphite 40g / l, particle size 1-8μm
[0050] pH 2.3
[0051] Temperature 60°C
[0052] Current density 15A / dm 2
[0053] stirring turbulence
[0054] Electrolyte flow 6-10m / s
[0055] The prepared coating contained about 1.7% graphite.
[0056] Example 2
[0057] The nickel bath composition corresponds to that given in Example 1. However, suspension stabilizers and aggregation preventing substances are added. Stir more gently; electrolyte flow is only about 4m / s. The graphite content in the deposited nickel layer was 9.0%.
[0058] The layer structures prepared according to Examples 1 and 2 had the following composition:
[0059] The total thickness of the layers produ...
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Abstract
A battery sheath made of formed and cold-rolled sheet metal as well as a process for manufacturing the battery sheath are proposed. In the process, cold-rolled strip stock is provided on at least one side with a coating of Ni, Co, Fe, Sn, In, Pd, Bi or their alloys in an electroplating bath, e.g., a Watts-type bath. As an additional component, the electroplating bath contains electrically conductive particles such as carbon, carbon black, graphite, TiS2, TaS2, MoSi2. These particles are deposited on the base material during electroplating together with Ni, Co, Fe, Sn, In, Pd, Bi or their alloys. The sheet metal side with, for example, the carbon-containing electroplated coating faces preferably inwardly when the sheet is formed into a battery sheath. Batteries with battery sheaths produced in this manner exhibit reduced increase in internal resistance, even with prolonged storage, as compared to known batteries.
Description
technical field [0001] The invention relates primarily to battery casings made of formed cold-rolled sheet metal, at least internally provided with a coating comprising Ni, Co, Fe, Sn, In, Pd, Bi and / or their alloys produced by electroplating. Background technique [0002] The invention also relates to a method for the production of strip material for battery bushings, in which cold-rolled metal sheets are provided with a coating formed in an electroplating bath. [0003] The quality of the battery depends especially on how long the rated voltage and capacity of the warranty can be maintained. The higher the internal resistance of the battery, the lower the battery voltage in the charged state. A more important property of battery quality is performance during long-term storage. Long-term storage causes the internal resistance of the battery to increase. The internal resistance and its increase during long-term storage depend on several factors: During the preparation of ...
Claims
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Application Information
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