Electric vehicle power distribution box

Abstract

The embodiment of the present invention relates to a power distribution box for an electric vehicle, comprising an upper case, a lower case, a plurality of relays and a PCB, the upper case is fixedly connected to the lower case, and the plurality of relays are fixedly mounted on On the upper case, the PCB is fixedly mounted on the lower case, the upper case has a hollow structure, and the connecting terminals of the plurality of relays pass through the hollow structure of the upper case and are inserted into the PCB. on the corresponding terminals. The power distribution box reduces the difficulty of installation and maintenance.

Description

technical field [0001] The invention relates to the technical field of automobiles, and in particular relates to an electric vehicle power distribution box. Background technique [0002] With the continuous development of automobile technology, there are more and more electrical equipment on automobiles, especially new energy vehicles. Components such as relays and fuses are used for power distribution and circuit protection control of various electrical loads in automobiles. [0003] In the prior art, the high-voltage distribution box for new energy electric vehicles is the high-voltage and high-current distribution unit PDU of all pure electric vehicles and plug-in hybrid vehicles. Most of them follow the design concept of industrial high-voltage distribution boxes, which are safe and reliable. Both the quality and durability cannot meet the requirements of automobiles, and there are problems such as large volume, low integration, and complicated assembly. Specifically, ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the high-voltage distribution box for new energy electric vehicles is the high-voltage and high-current distribution unit PDU of all pure electric vehicles and plug-in hybrid vehicles. Most of them follow the design concept of industrial high-voltage distribution boxes, which are safe and reliable. Both the durability and durability cannot meet the requirements of automobiles, and there are problems such as large volume, low integration, and complicated assembly.

Specifically, the existing high-voltage power distribution box uses bolt-mounted relays, which are difficult to install and maintain, and there is a risk of overheating caused by bolt torque attenuation; the space required for installation is large, and the space utilization rate is not high; low-voltage control and high-voltage acquisition are connected by wire harnesses The traditional wiring harness production cost is high, the wiring is difficult, the wiring harness cannot be automated, and the assembly production efficiency is low; the traditional shunt module is used for current sampling, and the internal resistance of the shunt module will change with temperature. The accuracy of current sampling It is directly related to the thermal stability of the internal resistance of the shunt module. The temperature drift of the shunt module is large, resulting in low current collection accuracy; small current fuses are generally installed inside the high-voltage power distribution box, and maintenance is difficult

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