CN204333152U - Pure electric vehicle power battery pack with integrated high-voltage control box - Google Patents

Abstract

The utility model relates to a high-voltage control box integrated inside the power battery pack of a pure electric vehicle, between the main positive connector of the battery pack and the high-voltage fuse in the box, between the high-voltage fuse and the main positive contactor, and between the main positive contactor and the main positive contactor. Between the battery system output main positive connector, between the main positive contactor and the charging contactor, between the charging contactor and the charging connector, between the battery system output main negative connector and the main negative contactor, between the main negative contactor Between the shunt and the shunt, and between the shunt and the battery pack's general negative connector are connected through a high-voltage wire harness; between the charging contactor and the pre-charging resistor, between the pre-charging resistor and the pre-charging contactor, and between the pre-charging contactor and the pre-charging contactor Between the main positive contactors, and between the low-voltage harness connector and the main positive contactor, pre-charging contactor, charging contactor, main negative contactor and shunt are connected through the low-voltage wiring harness. The high-voltage control box of the utility model significantly improves the electric high-voltage safety performance of the vehicle.

Description

Pure electric vehicle power battery pack with integrated high-voltage control box

technical field

The utility model belongs to the technical field of automobile design and manufacture. More specifically, the utility model relates to a high-voltage control box integrated inside a power battery pack of a pure electric vehicle.

Background technique

In order to increase the mileage of pure electric vehicles, it is necessary to arrange as many lithium battery modules as possible in the power battery pack, so that the layout space of the battery management unit and high-voltage electrical components in the battery pack is scattered; When wiring between components, the high and low voltage wiring harnesses are too long and messy and cross each other; there is also no necessary insulation protection for the terminal posts of high-voltage electrical components, and there is no corresponding fixed point for the wiring harness; there are potential safety hazards in the electrical high-voltage system , can not meet the wiring harness design specifications, but also increase the weight and cost of the wiring harness.

Utility model content

In order to solve the above-mentioned technical problems in the prior art, the purpose of this utility model is to provide a pure electric vehicle power battery pack with an integrated high-voltage control box.

In order to achieve the above object, the utility model adopts the following technical solutions:

A pure electric vehicle power battery pack internally integrates a high-voltage control box, including a box body, which is characterized in that: the box body is provided with a battery pack main positive connector, a high-voltage fuse, a main connector, charging contactor, charging connector, battery system output total negative connector, total negative contactor, pre-charging resistor, shunt, pre-charging contactor, battery pack total negative connector and low-voltage harness connector; the battery Between the main positive connector of the group and the high-voltage fuse, between the high-voltage fuse and the main positive contactor, between the main positive contactor and the battery system output main positive connector, between the main positive contactor and the charging contactor, charging Between the contactor and the charging connector, between the battery system output main negative connector and the main negative contactor, between the main negative contactor and the shunt, and between the shunt and the battery pack main negative connector are all passed through the high-voltage wire harness Connection; between the charging contactor and the pre-charging resistor, between the pre-charging resistor and the pre-charging contactor, between the pre-charging contactor and the main positive contactor, and between the low-voltage harness connector and the main positive contactor, and the pre-charging contactor , the charging contactor, the total negative contactor and the shunt are connected through a low-voltage wire harness.

Wherein, the high-voltage wire harness is a soft copper bar or a copper braided wire.

Wherein, the total positive connector of the battery pack, the total positive connector of the battery system output, the total negative connector of the battery system output and the total negative connector of the battery pack are respectively arranged at the four corners of the box body, and the low-voltage harness connector is arranged at the battery Between the pack main positive connector and the battery pack main negative connector, the charging connector is arranged between the battery system output main positive connector and the battery system output main negative connector.

Compared with the prior art, the integrated high-voltage control box inside the pure electric vehicle power battery pack described in the utility model has the following beneficial effects:

The layout of the internal integrated high-voltage control box in this embodiment is more reasonable, the high-voltage components are controlled centrally, and are isolated from the outside, and the high-voltage safety performance has been greatly improved, which is very beneficial to the driving safety of the vehicle; the wiring harness direction is also relatively standardized. The length and fixed points of the wiring harness are also reduced accordingly, which is beneficial to reduce the cost; the control box and connector are increased, but the weight of the wiring harness is reduced, which has no great impact on the weight of the vehicle.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the high-voltage control box integrated inside the pure electric vehicle power battery pack in Example 1.

Detailed ways

The integrated high-voltage control box inside the pure electric vehicle power battery pack described in the utility model will be further elaborated below in conjunction with specific embodiments, so as to help those skilled in the art have a more complete and accurate understanding of the utility model concept and technical solution of the utility model. and deep understanding.

Example 1

As shown in Figure 1, the pure electric vehicle power battery pack described in this embodiment integrates a high-voltage control box inside, including a box body, and the box body is provided with a battery pack general positive connector 1, a high-voltage fuse 3, battery system output main positive connector 4, charging contactor 5, charging connector 6, battery system output main negative connector 7, main negative contactor 8, pre-charging resistor 9, shunt 10, pre-charging contactor 11. The total negative connector 12 of the battery pack and the low-voltage harness connector 14; between the total positive connector 1 of the battery pack and the high-voltage fuse 2, between the high-voltage fuse 2 and the total positive contactor 3, and the total positive contactor 3 and battery system output main positive connector 4, between main positive contactor 3 and charging contactor 5, between charging contactor 5 and charging connector 6, battery system output main negative connector 7 and main negative contact 8, between the total negative contactor 8 and the shunt 10, and between the shunt 10 and the total negative connector 12 of the battery pack are connected through a high-voltage wire harness 15; between the charging contactor 5 and the pre-charging resistor 9, Between the pre-charging resistor 9 and the pre-charging contactor 11, between the pre-charging contactor 11 and the main positive contactor 3, and between the low-voltage harness connector 14 and the main positive contactor 3, the pre-charging contactor 11, and the charging contactor 5 , the total negative contactor 8 and the shunt 10 are connected through a low-voltage wire harness 13 . The total positive connector 1 of the battery pack, the total positive connector 4 of the battery system output, the total negative connector 7 of the battery system output and the total negative connector 12 of the battery pack are respectively arranged at the four corners of the box body, and the low-voltage harness connector 14 The charging connector 6 is arranged between the battery system output main positive connector 4 and the battery system output main negative connector 7 . The high-voltage wire harness is a soft copper bar or copper braided wire.

In the high-voltage control box described in this embodiment: 1-2-3-4--load--7-8--10-12 constitutes the discharge circuit of the battery pack; 6-5-2-1-battery-12- 10-8-7 constitutes the charging circuit of the battery pack; 1-2-9-11-4-load-7-8-10-12 constitutes the pre-charging circuit. The control box in the battery pack integrates electrical high-voltage control components to isolate the high-voltage components from external devices, which can improve safety and reliability; the distance between high and low voltage wiring is shortened to save costs; high-voltage wire harnesses and low-voltage wire harnesses are transferred through reliable connectors , each connector has the function of anti-wrong insertion, and has a corresponding mark; it is convenient for operability and maintainability; the height difference and the distance between the terminal posts between the high-voltage electrical components are relatively close, and the cross-sectional area of the high-voltage wire is relatively large (35mm ² ), The high-voltage wires are connected by soft copper bars or copper braided wires, which are easy to realize bending installation, and at the same time reduce the stress on the wire installation point; the control box is made of insulating material, and it is required to ensure the reliability of the installation of electrical components and the installation of the box body. vibration resistance. As the provider of pure electric vehicle energy, the power battery pack must ensure the safety of the power battery and its high-voltage control components and circuits; the high-voltage control box of the utility model is used in new energy vehicles that use power batteries to It provides a feasible solution for the management of power battery charge and discharge, as well as the monitoring and protection of voltage, current, temperature, power, etc., and significantly improves the electrical high-voltage safety performance of the vehicle.

For those of ordinary skill in the art, the specific embodiment is only an exemplary description of the utility model. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as the method concept and technical solution of the utility model are adopted to carry out Various insubstantial improvements, or directly applying the concept and technical solutions of the utility model to other occasions without improvement, are all within the protection scope of the utility model.

Claims (3)

1. A pure electric vehicle power battery pack internally integrates a high-voltage control box, including a box body, which is characterized in that: the box body is provided with a battery pack general positive connector, a high-voltage fuse, a general positive Positive connectors, charging contactors, charging connectors, battery system output total negative connectors, total negative contactors, pre-charging resistors, shunts, pre-charging contactors, battery pack total negative connectors and low-voltage harness connectors; all Between the main positive connector of the battery pack and the high-voltage fuse, between the high-voltage fuse and the main positive contactor, between the main positive contactor and the battery system output main positive connector, between the main positive contactor and the charging contactor , between the charging contactor and the charging connector, between the battery system output main negative connector and the main negative contactor, between the main negative contactor and the shunt, and between the shunt and the battery pack main negative connector. High-voltage harness connection; between the charging contactor and the pre-charging resistor, between the pre-charging resistor and the pre-charging contactor, between the pre-charging contactor and the main positive contactor, and between the low-voltage harness connector and the main positive contactor, pre-charging The contactor, charging contactor, main negative contactor and shunt are connected by low-voltage wire harness. 2. The internal integrated high-voltage control box according to claim 1, characterized in that: the high-voltage wire harness is a soft copper bar or copper braided wire. 3. The internal integrated high-voltage control box according to claim 1, characterized in that: said battery pack general positive connector, battery system output total positive connector, battery system output total negative connector and battery pack total negative connector They are respectively arranged at the four corners of the box body, and the low-voltage harness connector is arranged between the battery pack general positive connector and the battery pack general negative connector, and the charging connector is arranged between the battery system output general positive Connector.