CN210161916U - Integrated control component for electric automobile - Google Patents

Abstract

The utility model relates to an integrated control component that electric automobile used includes at least: the vehicle-mounted charger converts AC electricity into high-voltage direct current to supply power to the power battery; the high-voltage direct-current converter converts high voltage of the power battery into low voltage to supply power to low-voltage equipment of the whole vehicle and simultaneously charges a low-voltage storage battery; distributing the high voltage of the power battery to a high voltage distribution box of each high voltage electric device according to a certain requirement; the method is characterized in that: the high-voltage direct-current converter comprises a DC-DC main chip board; the vehicle-mounted charger comprises an OBC main chip board; the integrated control component for the electric automobile further comprises a carrier made of an insulating material; the OBC main chip board is arranged on the carrier, and a cooling pipeline is arranged on the OBC main chip board; the cooling pipeline is provided with a DC-DC main chip board and a high-voltage distribution box; the OBC main chip board, the cooling pipeline, the DC-DC main chip board and the high-voltage distribution box are all fixedly connected with the carrier.

Description

Integrated control component for electric automobile

Technical Field

The utility model belongs to the technical field of the new energy automobile, concretely relates to integrated control component that electric automobile used.

Background

In recent years, with the change of energy structure and the worsening of environmental pollution, China develops new energy as an important measure for improving the environment and saving the cost. The new energy pure electric vehicle is favored by national policies and broad vehicle owners due to the advantages of low use cost, convenience in traveling, low carbon and environmental protection. However, the whole vehicle cost and the endurance mileage are bottlenecks in the development of new energy pure electric vehicles. In order to solve the problem, manufacturers of the large new energy pure electric vehicles have a serious problem of reducing the weight and the cost of the whole vehicle. The weight of the whole vehicle is reduced, the lightweight design is carried out, the load of a power battery can be reduced to a certain extent, and the endurance mileage of the vehicle is increased. On the pure electric vehicles of new forms of energy, on-vehicle machine of charging (OBC), high voltage direct current converter (DC-DC) and high voltage distribution box (PDU) all belong to solitary control unit module at present. The high-voltage plug-in and the wire harness are connected, as shown in fig. 1, a vehicle-mounted charger (OBC), a high-voltage direct current adapter (DC-DC) and a high-voltage Power Distribution Unit (PDU) of the existing new energy electric vehicle are all arranged in an engine room of the vehicle through an independent control module. According to the technical scheme, the three high-voltage electric appliances need to be connected by using the high-voltage wire harness and the high-voltage plug-in unit. In the general arrangement aspect, the positions of three high-voltage electric appliances, the arrangement of high-voltage wire harnesses and the type selection of high-voltage plug-in units need to be considered; in the aspect of EMC, the EMC risk of the whole vehicle can be improved due to the positions of the three high-voltage electric appliances and the trend of the high-voltage wire harness; in the aspect of design weight, the three high-voltage components and the high-voltage wire harness are used as a part of the weight of the whole vehicle, so that the load of a power battery is increased, and the endurance mileage of the whole vehicle is reduced. From a cost perspective: the three high-voltage electric appliance molds are added to the cost of the whole vehicle, and the cost burden is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides an integrated control component that electric automobile used for solving the technical problem that exists among the well-known technique.

The utility model aims at providing an integrated control component that electric automobile used includes at least:

the vehicle-mounted charger converts AC electricity into high-voltage direct current to supply power to the power battery;

the high-voltage direct-current converter converts high voltage of the power battery into low voltage to supply power to low-voltage equipment of the whole vehicle and simultaneously charges a low-voltage storage battery;

distributing the high voltage of the power battery to a high voltage distribution box of each high voltage electric device according to a certain requirement;

the high-voltage direct-current converter comprises a DC-DC main chip board; the vehicle-mounted charger comprises an OBC main chip board;

the integrated control component for the electric automobile further comprises a carrier made of an insulating material;

the OBC main chip board is arranged on the carrier, and a cooling pipeline is arranged on the OBC main chip board; the cooling pipeline is provided with a DC-DC main chip board and a high-voltage distribution box; the OBC main chip board, the cooling pipeline, the DC-DC main chip board and the high-voltage distribution box are all fixedly connected with the carrier.

The utility model has the advantages and positive effects that:

the utility model discloses with on-vehicle machine OBC that charges, high voltage direct current converter DC-DC and high voltage distribution box PDU are integrated into a control unit's structural design. From a cost perspective, the costs associated with high voltage wiring harnesses and high voltage connectors are reduced. From a weight perspective, the high voltage wiring harness and the housings for the high voltage components OBC, DC-DC and PDU are all reduced. Not only the cost is reduced, but also the purpose of reducing weight is achieved.

Drawings

FIG. 1 is a schematic diagram of a conventional structure;

FIG. 2 is a schematic structural diagram of a preferred embodiment of the present invention;

fig. 3 is a schematic structural diagram of an upper layer in the preferred embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a middle layer in a preferred embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a lower layer in a preferred embodiment of the present invention;

fig. 6 is a wiring diagram of a high voltage power distribution unit according to a preferred embodiment of the present invention.

Detailed Description

For further understanding of the contents, features and functions of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings as follows:

basic abbreviation explanation:

OBC-vehicle charger;

DC-DC- - -high voltage direct current converter;

PDU-high voltage power distribution unit;

BMS- -Battery management System;

EMC- -electromagnetic compatibility

As shown in fig. 1 to 6, an integrated control component for an electric vehicle integrates three functional components, namely a vehicle-mounted charger OBC, a high-voltage direct-current converter DC-DC and a high-voltage power distribution unit PDU, which are called CDU for short, and the vehicle-mounted charger OBC converts AC power into high-voltage direct current to supply power to a power battery. The high-voltage direct-current converter DC-DC converts high voltage of the power battery into low voltage to supply power to low-voltage equipment of the whole vehicle and charge a low-voltage storage battery. The high-voltage power distribution unit PDU distributes the high voltage of the power battery to each high-voltage electric equipment according to a certain requirement. Meanwhile, the CDU has the characteristics of stable output voltage, high conversion efficiency, safety, reliability, strong vibration resistance and the like, and has the protection functions of output short circuit, output over-voltage and under-voltage, input over-voltage and under-voltage, over-temperature and the like.

Preferably, the preferred embodiment adopts a three-layer structure design, and the upper layer is a DC-DC main chip board and a high-voltage PDU. The middle layer is a cooling management system of a DC-DC main chip and an OBC main chip. The lower layer is an OBC main chip board.

Referring to fig. 3, the upper layer mainly includes: the high-voltage circuit breaker comprises a DC-DC main chip board 1, a microswitch 2, a high-voltage distribution board 3, a high-voltage fuse 4 and a high-voltage relay 5.

Referring to fig. 4, the middle layer is mainly a cooling pipeline for dissipating heat from the upper layer and the lower layer;

referring to fig. 5, the lower layer is mainly: OBC main chip board and casing additional strengthening.

The high-voltage direct current (DC-DC) converter converts the high-voltage electricity of 320V of a power battery on a vehicle into low-voltage electricity of 7-18V through a voltage reduction transformation circuit to supply power for low-voltage components on the vehicle and charge a vehicle storage battery. The main parameters are as follows:

TABLE 1 parameter table of HVDC adapter

Item	Parameter(s)
		System operating voltage	7-18V DC
Rated input voltage	326V DC
		Rated output voltage	14V DC
Rated output current	179A
		Peak output current	200±10A
Rated output power	2.5KW
		Peak output power	2.8KW
Efficiency of	93％

The vehicle-mounted charger (OBC) is used for converting 220V alternating current of a national power grid into high-voltage direct current through a rectifying circuit to charge a power battery of a vehicle. Meanwhile, the OBC also monitors the working state of the high-voltage quick-charging relay of the vehicle and interacts with a Battery Management System (BMS) of the vehicle in real time. The main parameters are as follows:

TABLE 2 parameter table of vehicle charger

The high-voltage Power Distribution Unit (PDU) distributes current after high-voltage power output by the power battery passes through the high-voltage fuse by the guide copper bar in the PDU. Please refer to fig. 6 for a schematic diagram;

and cooling systems of a high-voltage direct current adapter (DC-DC) and a vehicle-mounted charger (OBC) are borne by a CDU intermediate cooling water circuit. The coolant medium was 50% each of ethylene glycol and water. The structural design of the cooling water channel is verified by simulating the heat productivity of the OBC and the DC-DC during working so as to ensure the working temperature of the control module.

By integrating the high-voltage direct current adapter (DC-DC), the vehicle-mounted charger (OBC) and the high-voltage Power Distribution Unit (PDU) into an independent control unit, the cost is compared, the die development cost of the DC-DC and the PDU and the cost of related high-voltage wire harnesses are reduced, and 2000 and 3000 RMB/vehicle can be saved. From a weight reduction perspective, the weight of the DC-DC and PDU housings and associated high voltage inserts, wiring harness weight, is reduced. It is expected that 8-10 KG/car can be lightened.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims (1)

1. An integrated control member for an electric vehicle, comprising at least:

the vehicle-mounted charger converts AC electricity into high-voltage direct current to supply power to the power battery;

the high-voltage direct-current converter converts high voltage of the power battery into low voltage to supply power to low-voltage equipment of the whole vehicle and simultaneously charges a low-voltage storage battery;

distributing the high voltage of the power battery to a high voltage distribution box of each high voltage electric device according to a certain requirement;

the method is characterized in that:

the high-voltage direct-current converter comprises a DC-DC main chip board; the vehicle-mounted charger comprises an OBC main chip board;

the integrated control component for the electric automobile further comprises a carrier made of an insulating material;

the OBC main chip board is arranged on the carrier, and a cooling pipeline is arranged on the OBC main chip board; the cooling pipeline is provided with a DC-DC main chip board and a high-voltage distribution box; the OBC main chip board, the cooling pipeline, the DC-DC main chip board and the high-voltage distribution box are all fixedly connected with the carrier.

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