Insulation process of motor stator punching sheet for electric vehicle

Abstract

The invention provides an insulation process of a motor stator punching sheet for an electric vehicle, which comprises the steps of surface processing, protection, preheating and dip-coating curing of the motor stator punching sheet sequentially. The step of protection comprises the following sub steps that: a rotating shaft protection tool is connected at the position of a shaft hole of the motor stator punching sheet; and a hull cell protection tool is connected into a rebate of the hull cell. The hull cell protection tool comprises a protection block of a shape corresponding to that of the rebate of the hull cell and at least one pin. The step of dip-coating curing sequentially comprises the following steps of: firstly, placing the motor stator punching sheet in a fluidized bed; secondly, powdering; and finally, carrying out leveling processing. An insulating layer is formed on the surface layer of the motor stator punching sheet processed by the insulation process, the motor stator punching sheet can be direct subjected to subsequent processes such as wire insertion and the like and insulation paper and bamboo sticks in a stator punching sheet slot are reduced, and thus, the weight of a motor stator is reduced. The dip-coating of insulating powder is carried out in the fluidized bed, so the automation degree is improved, uniform dip-coating is ensured, the quality of the insulating layer is assured and the demand for batch production is met.

Description

technical field [0001] The invention belongs to the motor insulation coating treatment technology, in particular to an insulation process for electric vehicle motor stator stamping. Background technique [0002] The conventional insulation of the motor stator punching sheet for electric vehicles is the use of pad insulating paper and slot skewers, and the varnish dipping process is used to ensure insulation. This technique has problems in batch production and automatic production. Rules cannot be automated. The annual output of motors for electric vehicles is more than 20 million units. Most of the large enterprises still use insulating paper (DMD) in the punching groove of the motor stator at the beginning, and insert epoxy side plates or steamed Bamboo skewers are then dipped in varnish. The feature of this process is that it is relatively simple, but the labor cost is relatively high, and it is easy to cause the bamboo skewer inserted into the stator punching slot to b...

AI Technical Summary

Problems solved by technology

The feature of this process is that it is relatively simple, but the labor cost is relatively high, and it is easy to cause the bamboo skewer inserted into the stator punching slot to be exposed and rub the rotor; some stators still have enameled wires contacting the iron core, resulting in zero insulation resistance. It is not conducive to mass production. In order to meet the requirements of protecting the environment and reducing carbon emissions worldwide, the development prospects of electric vehicles are relatively broad.

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