The electrical conductivity of the battery spring is better. The battery springs that are not strictly required can be made of carbon steel wire and then electroplated. And electroplating also needs to be plated with copper first and then with nickel. The salt spray test is required to be at least 5% for more than 24 hours. The product requires high conductivity, and the surface is plated with gold, silver, tin, etc. The spring material can also choose copper wire, of course, the elasticity of copper wire is not as good as that of carbon steel.

The structure of the spring should be reasonable, and the stability of the installation should be considered thoroughly. The center point of the spring contacting the battery should be aligned. The place where the spring touches the battery should not be too large. If it is too large, it is easy to connect the positive electrode and the negative electrode, causing a short circuit.

Attention should be paid to the packaging of battery springs after the production of battery springs. In order to facilitate production, the battery spring packaging of spring manufacturers must be convenient for production line production. Because the battery spring is mostly spiral, and there are many hooks. It is easy to interlock and be entangled and not easy to separate, which affects the production speed. Therefore, the construction uses a blister box for independent packaging or a small number of packaging.

Surface processing requirements.
The surface should have enough machining allowance to ensure the final grinding amount. Turning and grinding generally use a master to ensure the accuracy of the arc (or taper), and no knife marks or grinding marks are allowed. For the minimum processing of various hot-rolled steels with different diameters, for mass-produced torsion springs, considering the surface processing costs, specific surface and quality requirements can be put forward for the blanks to reduce the processing volume. For torsion springs that do not process dry surfaces (such as torsion springs with non-circular cross-sections), restrictions on the degree of surface decarburization, surface defects, and surface dimensional tolerances should be put forward.

Requirements for heat treatment.
Heat treatment is the key process for manufacturing high-strength torsion springs. For 45CrNIMOVA material, the heat treatment hardness is increased to HRC52-58, and then the strong torsion can make the torsion spring achieve the best strong torsion effect and maximize the working stress of the torsion spring.

Requirements for surface strengthening treatment.
In order to increase the fatigue life of the torsion spring, the torsion spring should be mechanically strengthened. Generally, surface strengthening methods such as rolling and shot peening are used.

Surface protection requirements.
In order to prevent corrosion and damage to the mechanical surface, surface treatment (such as phosphating, paint treatment) and methods such as rubber tape, nylon cloth, and epoxy paint can be used to protect it.