CN214477640U

CN214477640U - Battery package high voltage distribution box BDU

Info

Publication number: CN214477640U
Application number: CN202120325088.XU
Authority: CN
Inventors: 刘小康; 马晨; 吴洪强; 贾红军
Original assignee: Ningbo Fengmei New Energy Automobile Technology Co ltd
Current assignee: Ningbo Fengmei New Energy Automotive Technology Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-10-22
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses a battery pack high voltage distribution box BDU, which comprises an upper shell and a lower shell, wherein a plurality of electrical components are arranged in the lower shell, and are connected through a plurality of copper bars and wire harnesses to form a positive circuit, a negative circuit and a pre-charging circuit; the bottom surface of the copper bar is exposed out of the bottom surface of the lower shell, an insulating film is arranged on the bottom surfaces of the copper bar and the lower shell, and a heat conducting pad is arranged on the insulating film. The utility model discloses the radiating effect is good, can improve the life of battery package.

Description

Battery package high voltage distribution box BDU

Technical Field

The utility model relates to an electric vehicle technical field specifically relates to a battery package high voltage distribution box BDU.

Background

The Battery Disconnection Unit (BDU) is used as a device for disconnecting and connecting high-voltage power batteries of the new energy automobile, is located in a Battery pack, is a working Unit for high-voltage distribution, disconnection and short-circuit protection of a Battery system, plays a vital role in the safety of the Battery pack, and is a more critical part of the new energy automobile. The BDU integrates parts such as a relay, a pre-charging resistor, a current sensor, a fuse, a high-voltage copper bar, a low-voltage connector, a high-voltage sampling connector, a wiring harness assembly and the like. The service life and the safety of the BDU directly influence the service life and the safety of the battery pack, so that the safety and the performance of the new energy automobile are influenced.

Along with the improvement of new energy automobile performance, electric quantity, output power etc. of battery package increase gradually, need discharge power grow, the charge time shortens for the charge-discharge current of battery package is showing and is increaseing. The increase of working current makes the inside components and parts heating power of BDU obviously increase, and operating temperature is showing and is promoting. The working temperature is increased, so that the risks of accelerated aging, adhesion and the like of heating components in the BDU are increased, and the safety and the service life of the BDU are influenced. The traditional way of providing heat dissipation holes on the shell to dissipate heat cannot meet the heat dissipation requirements of the BDU.

Therefore, how to enhance the heat dissipation capability of the heat generating component in the BDU is a technical problem that needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem that exists among the prior art, aim at providing a battery package high voltage distribution box BDU that the radiating effect is good, can improve the life of battery package.

The specific technical scheme is as follows:

a BDU (high voltage distribution box) of a battery pack comprises an upper shell and a lower shell, wherein a plurality of electrical components are arranged in the lower shell, and are connected through a plurality of copper bars and wire harnesses to form a positive circuit, a negative circuit and a pre-charging circuit; the bottom surface of the copper bar is exposed out of the bottom surface of the lower shell, an insulating film is arranged on the bottom surfaces of the copper bar and the lower shell, and a heat conducting pad is arranged on the insulating film.

The electrical elements forming the positive circuit comprise a positive input copper bar, a main positive relay, a main positive connecting copper bar, a first fuse, a first main positive output copper bar, a second fuse and a second main positive output copper bar which are sequentially connected in series.

The electrical elements forming the negative circuit comprise a negative input copper bar, a current sensor, a negative connecting copper bar, a main negative relay and a negative output copper bar which are sequentially connected in series.

The electric appliance elements forming the pre-charging loop comprise a pre-charging relay and a pre-charging resistor which are connected in series through a wiring harness, and the pre-charging loop formed by the series connection is connected in parallel at two ends of the main positive relay.

And the positive input copper bar, the main positive connecting copper bar, the main positive output copper bar I, the main positive output copper bar II, the negative input copper bar and the negative output copper bar are uniformly provided with a high-voltage sampling terminal and a wire harness connector I.

And the main positive relay, the main negative relay, the pre-charging relay and the current sensor are respectively provided with a low-voltage control and feedback loop and a wiring harness connector II.

The upper shell and the lower shell are fixedly connected through screws, the lower shell is provided with mounting feet, rubber bushings are assembled on the mounting feet, and metal bushings are installed in the rubber bushings.

A plurality of heat dissipation grooves are formed in the upper shell.

The utility model has the advantages that: the utility model discloses an expose the copper bar in the outer structure of casing bottom surface down for heat radiating area on the copper bar increases, pastes the insulating film in order to guarantee the insulating properties of whole battery package on the bottom surface of copper bar again, pastes on the insulating film again and covers the heat conduction pad, makes the heat that the copper bar produced rapidly outside shifting the casing in the casing, has strengthened the heat-sinking capability of battery package, compares in traditional seting up the louvre on the casing and comes radiating mode, the utility model discloses a radiating effect is better.

Drawings

Fig. 1 is a schematic view of the overall structure of a BDU of a battery pack high-voltage distribution box of the present invention;

fig. 2 is a schematic structural view of the battery pack high-voltage distribution box BDU of the present invention with the upper case removed;

fig. 3 is a schematic bottom structure view of the lower housing in the high voltage distribution box BDU of the battery pack of the present invention;

fig. 4 is a schematic structural diagram of an upper housing in the battery pack high voltage distribution box BDU of the present invention;

fig. 5 is a schematic structural diagram of the lower housing in the battery pack high voltage distribution box BDU of the present invention.

In the attached drawings, 1.1, an upper shell; 1.2, a lower shell; 2. an insulating film; 3. a thermally conductive pad; 4. a heat sink; 5.1, inputting a copper bar into the positive electrode; 5.2, a main positive relay; 5.3, connecting the main positive copper bar; 5.4, a first fuse; 5.5, a main positive output copper bar I; 5.6, a second fuse; 5.7, a main positive output copper bar II; 6.1, inputting a copper bar at the negative electrode; 6.2, a current sensor; 6.3, connecting the negative electrode with a copper bar; 6.4, a main negative relay; 6.5, outputting copper bars by a negative electrode; 7.1, a pre-charging relay; 7.2, pre-charging a resistor; 8.1, a high-voltage sampling terminal; 8.2, a first wiring harness connector; 9.1, a low-voltage control and feedback loop; 9.2, wiring harness connector II; 10. mounting a foot; 10.1, rubber bushings; 10.2, metal lining.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the utility model discloses a battery package high voltage distribution box BDU, including last casing 1.1 and lower casing 1.2, be equipped with a plurality of electrical components in the casing 1.2 down, connect through a plurality of copper bars and pencil between a plurality of electrical components and form positive pole return circuit, negative pole return circuit and pre-charge return circuit. The bottom surface of copper bar exposes outside the bottom surface of casing 1.2 down, and is preferred, and the bottom surface of copper bar and the bottom surface coplane of casing 1.2 down set up insulating film 2 on the bottom surface of copper bar and casing 1.2 down, set up thermal pad 3 on insulating film 2 for the heat-sinking capability of battery package further strengthens. The utility model discloses a design the copper bar into with lower casing 1.2 bottom surface coplane structure for heat radiating area on the copper bar increases, pastes insulating film 2 in order to guarantee the insulating properties of whole battery package on the bottom surface of copper bar again, pastes on insulating film 2 again and covers heat conduction pad 3, makes the heat that the copper bar produced rapidly outside shifting the casing in the casing, has strengthened the heat-sinking capability of battery package, compares in traditional seting up the louvre on the casing and comes radiating mode, the utility model discloses a radiating effect is better.

In order to enhance the heat dissipation capability of the battery pack, a plurality of heat dissipation grooves 4 are formed in the upper case 1.1, as shown in fig. 4, the heat dissipation grooves 4 are located near the electrical components which generate more heat, so that the heat dissipation effect is better.

The utility model discloses battery package high voltage distribution box BDU mainly includes two positive and negative return circuits, and the electrical components that constitute the positive return circuit include anodal input copper bar 5.1, main positive relay 5.2, main positive connecting copper bar 5.3, fuse one 5.4, main positive output copper bar one 5.5, fuse two 5.6, main positive output copper bar two 5.7 that establish ties in proper order; the electrical elements forming the negative circuit comprise a negative input copper bar 6.1, a current sensor 6.2, a negative connecting copper bar 6.3, a main negative relay 6.4 and a negative output copper bar 6.5 which are sequentially connected in series. The electrical components forming the pre-charging circuit comprise a pre-charging relay 7.1 and a pre-charging resistor 7.2 which are connected in series through a wire harness, and the pre-charging circuit formed by the series connection is connected in parallel at two ends of a main positive relay 5.2.

And a high-voltage sampling terminal 8.1 and a wire harness connector I8.2 are uniformly arranged on the positive input copper bar 5.1, the main positive connecting copper bar 5.3, the main positive output copper bar I5.5, the main positive output copper bar II 5.7, the negative input copper bar 6.1 and the negative output copper bar 6.5. And a main positive relay 5.2, a main negative relay 6.4, a pre-charging relay 7.1 and a current sensor 6.2 are respectively provided with a low-voltage control and feedback loop 9.1 and a wiring harness connector II 9.2.

The low-voltage control and feedback loop 9.1 controls the connection and the disconnection of the positive loop and the negative loop through the attraction and the disconnection of the main relay, and simultaneously acquires the current value of the loop through the current sensor and transmits a signal to the battery management system through the wiring harness connector.

In addition, after the upper casing 1.1 and the lower casing 1.2 are fixedly connected through screws, the lower casing 1.2 is provided with a mounting foot 10, as shown in fig. 5, a rubber bushing 10.1 is assembled on the mounting foot 10, and a metal bushing 10.2 is installed in the rubber bushing 10.1, as shown in fig. 3, the rubber bushing 10.1 and the metal bushing 10.2 are integrated into a whole through a certain interference and friction force, and the impact resistance is increased and the shock absorption performance is improved by using a rubber material.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, rear, inner and outer … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. The utility model provides a battery package high voltage distribution box BDU which characterized in that: the device comprises an upper shell (1.1) and a lower shell (1.2), wherein a plurality of electrical components are arranged in the lower shell (1.2), and are connected through a plurality of copper bars and wire harnesses to form a positive circuit, a negative circuit and a pre-charging circuit; the bottom surface of copper bar exposes outside the bottom surface of casing (1.2) down set up insulating film (2) on the bottom surface of copper bar and casing (1.2) down set up heat conduction pad (3) on insulating film (2).

2. The battery pack high voltage distribution box BDU according to claim 1, wherein the electrical components that make up the positive circuit include a positive input copper bar (5.1), a main positive relay (5.2), a main positive connection copper bar (5.3), a first fuse (5.4), a main positive output copper bar (5.5), a second fuse (5.6), and a main positive output copper bar (5.7) connected in series in this order.

3. The battery pack high voltage distribution box BDU according to claim 2, characterized in that the electrical components that make up the negative circuit comprise a negative input copper bar (6.1), a current sensor (6.2), a negative connection copper bar (6.3), a main negative relay (6.4), a negative output copper bar (6.5) connected in series in this order.

4. The battery pack high voltage distribution box BDU according to claim 2, characterized in that the electrical components constituting the pre-charge circuit comprise a pre-charge relay (7.1) and a pre-charge resistor (7.2) connected in series by a wire harness, the pre-charge circuit formed in series being connected in parallel across a main positive relay (5.2).

5. The BDU of claim 3, wherein the positive input copper bar (5.1), the main positive connection copper bar (5.3), the main positive output copper bar I (5.5), the main positive output copper bar II (5.7), the negative input copper bar (6.1) and the negative output copper bar (6.5) are all provided with high voltage sampling terminals (8.1) and harness connectors.

6. The BDU of claim 3, wherein the main positive relay (5.2), the main negative relay (6.4), the pre-charging relay (7.1) and the current sensor (6.2) are all provided with a low-voltage control and feedback loop (9.1) and a wire harness connector.

7. The BDU according to claim 1, wherein the upper case (1.1) and the lower case (1.2) are fixedly connected by screws, a mounting foot (10) is provided on the lower case (1.2), a rubber bushing (10.1) is fitted on the mounting foot (10), and a metal bushing (10.2) is fitted in the rubber bushing (10.1).

8. The BDU according to claim 1, wherein the upper case (1.1) has a plurality of heat dissipation grooves (4) formed thereon.