Quick-replacing battery box electric connection device for electric vehicle

Abstract

The invention discloses a quick-replacing battery box electric connection device for an electric vehicle. The cross section of an outer box electrode contact (2) is of a T-shaped step structure, and the outer box electrode contact (2) is divided into a large end, a middle section and a small end. A groove is formed in the end face of the large end of the outer box electrode contact, and an elastic electric conductor (1) is fixedly arranged in the groove. The outer box electrode contact is sleeved with a spring (3) and then penetrates into a rear cavity from a front cavity of an outer box electrode base (4). One end of the spring abuts against the reverse side of the large end of the outer box electrode contact. The other end of the spring abuts against the position, in front of an inner hole, of the front cavity of the outer box electrode base. The small end of the outer box electrode contact is sleeved with a limiting block (7) and a cable connecting nut (5). The limiting block abuts against the step on the middle section of the outer box electrode contact. A connecting cable (8) is clamped and fastened through the limiting block and the cable connecting nut. An electrode base rear cover (6) is arranged in the rear cavity of the outer box electrode base. The quick-replacing battery box electric connection device can enable contact resistance between the outer box electrode contact and an inner box electrode contact to become smaller, the outer box electrode contact can swing along with the inner box electrode contact, and consequently it can be guaranteed that the electrode contacts are always in a good contact state.

Description

technical field [0001] The invention relates to a conductive connection device for a battery box of an electric vehicle, in particular to an electrical connection device for a quick-change battery box of an electric vehicle. Background technique [0002] Chinese patent 200710122367.0 discloses a universal battery box, including an outer box and an inner box, the outer box is fixed on the electric vehicle body, the battery pack is installed in the inner box, and the inner box is slidably arranged in the outer box , to form a drawer-type loading and unloading of the battery pack. The outer box can form electrical and mechanical connections with the electric vehicle. The battery in the inner box is connected to the outer box through a plug-in module. The plug-in module mainly includes inner box electrode contacts and electrodes. seat, outer box electrode contact and electrode seat, in the electrical connection of the battery box, the electrode contacts of the inner box and ...

AI Technical Summary

Problems solved by technology

[0002] Chinese patent 200710122367.0 discloses a universal battery box, including an outer box and an inner box, the outer box is fixed on the electric vehicle body, and the battery pack is installed inside In the box, the inner box is slidably arranged in the outer box to form a drawer-type loading and unloading of the battery pack. The outer box can be electrically and mechanically connected to the electric vehicle, and the battery in the inner box is connected to the outer box through a plug-in module. The box body and the plug-in module mainly include the inner box electrode contact and the electrode seat, the outer box electrode contact and the electrode seat. In the electrical connection of the battery box, the electrode contacts of the inner box and the outer box are directly fixed on the electrode seat. Above, when the inner box and the outer box are installed in place, the electrode contacts in the inner box and the outer box rely on the contact of each other’s end faces to conduct electricity. The inner and outer boxes are relatively movable due to vibration during use, so the electrode contacts of the inner and outer boxes The contact plane of the head will inevitably produce parallelism errors, so that the electrode contacts in surface contact become line contact or point contact, resulting in an increase in contact resistance, and at the same time easily lead to the occurrence of discharge phenomena

However, the contact between the two end faces is still a three-point contact, the contact resistance is too high, and it is easy to generate high temperature when a large current is energized.

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