Pretreatment method of copper insert of storage battery terminal

A copper insert and pretreatment technology, applied in battery pack parts, electrical components, circuits, etc., can solve the problems of penetration corrosion of copper parts, reduce the effective cross-sectional area of ​​current flow, and complex processes, so as to improve the contact ability. and bonding strength, ensuring effective cross-sectional area, and simple operation.

Active Publication Date: 2012-07-04
ANHUI LEOCH BATTERY TECH
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods still have problems in actual operation. Method 1) there is a phenomenon of uneven distribution of the pre-impregnated lead-tin alloy layer on the surface of the copper insert, mainly due to the low surface energy of the surface of the copper insert during the tin immersion process. The corrosion protection layer is not completely removed, and there is still a local physical contact state in the subsequent casting process of lead alloy, which is equivalent to reducing the effective cross-sectional area of ​​current flow, resulting in an increase in pressure drop loss
Method 2) can only physically improve the torsion resistance of copper insert terminals, but cannot fundamentally solve the problem of molten contact between copper inserts and lead alloys
[0004] In addition, ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pretreatment method of copper insert of storage battery terminal
  • Pretreatment method of copper insert of storage battery terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dip the part of the copper insert to be cast into the lead alloy with a little flux, and then immerse it in the tin liquid at 320°C for 3s. After the pretreated copper insert is taken out, it is put into the terminal mold, and the lead alloy liquid is cast. The proportion of the soldering flux is as follows: rosin 0.02%, isopropanol 99.0%, polyethylene glycol 0.01%, and the balance is activator adipic acid.

[0020] After the battery terminal was formed, it was dissected and observed, and it was found that there was no gap between the lead alloy and the copper insert.

Embodiment 2

[0022] Dip the part of the copper insert to be cast into the lead alloy with a little flux, and then immerse it in the tin liquid at 240°C for 3s. After the pretreated copper insert is taken out, it is put into the terminal mold, and the lead alloy liquid is cast. Wherein the flux proportion is mass parts: 30% of deionized water, 65% of ethanol, 4% of succinic acid, 0.2% of glycerin, 0.4% of polyethylene glycol, and 0.4% of dioctyl phosphate.

[0023] After the battery terminal was formed, it was dissected and observed, and it was found that there was no gap between the lead alloy and the copper insert.

Embodiment 3

[0025] Dip the part of the copper insert to be cast into the lead alloy with a little rosin solder paste or solder paste, then immerse it in 300°C tin liquid for 4s, take it out, put it into the terminal mold, and cast the lead alloy liquid. After the battery terminal is formed, it is dissected to observe that there is no gap between the lead alloy and the copper insert.

[0026] In addition, the present invention also uses glutaric acid, sebacic acid, pimelic acid, malic acid, o-hydroxybenzoic acid, etc. There is no gap between the alloy and the copper insert.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a pretreatment method of a copper insert of a storage battery terminal. The pretreatment method comprises a treatment of dipping in a soldering flux and a liquid metal presoaking treatment, wherein the treatment of dipping in the soldering flux is performed by dipping the part to be cast of the copper insert in the soldering flux; and the liquid metal presoaking treatment is performed by soaking the copper insert dipped with the soldering flux in molten metal liquid of tin or terne metal. The pretreatment method of the copper insert of the storage battery terminal, disclosed by the invention, is simple to operate, and the copper insert is firmly bonded with a lead alloy; and a good fusion connection interface without gaps is arranged between the copper insert and the lead alloy in the storage battery terminal. According to the pretreatment method of the copper insert of the storage battery terminal, disclosed by the invention, the contact capability and the bonding strength between the copper insert and the lead alloy are improved, and the copper insert is less prone to flaking off; and the effective sectional area of current circulation is ensured, and the scrappage of a storage battery caused by the flaking-off phenomenon of the copper insert is simultaneously reduced.

Description

technical field [0001] The invention relates to the field of battery production, in particular to a pretreatment method for battery terminal copper inserts before being cast in a battery terminal casting mold in battery production. Background technique [0002] Valve-regulated sealed lead-acid batteries have the advantages of long cycle life, low self-discharge rate, safety and reliability, and low price, making them widely used in transportation, communication, electric power, UPS and other fields in recent years. Because batteries for high power output applications usually bear a large current load, a certain torque needs to be applied when connecting battery packs through busbars to fix the busbars and battery terminals with bolts to prevent contact resistance from increasing due to poor contact. As a result of the loss of electric energy and the arc phenomenon that may be caused by loose connections, usually a torque wrench is used to tighten the bolts at a certain torqu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B23K1/08B23K35/363H01M2/30
CPCY02E60/12Y02E60/10
Inventor 彭小勐李伟丽
Owner ANHUI LEOCH BATTERY TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap