CN218975539U

CN218975539U - BDU structure and battery pack

Info

Publication number: CN218975539U
Application number: CN202223420563.5U
Authority: CN
Inventors: 段有明; 高升; 曹胜捷
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-05
Anticipated expiration: 2032-12-20

Abstract

The utility model provides a BDU structure and a battery pack, wherein the BDU structure comprises an upper shell and a lower shell which are connected, an installation space for accommodating a contactor is defined between the upper shell and the lower shell, a sound insulation piece is arranged at the position, corresponding to the contactor, on the upper shell and/or the lower shell, and the contactor is electrically connected with a plug connector on the upper shell or the lower shell through a wiring row. The BDU structure of the utility model not only can play a better role in protecting the contactor, but also can effectively reduce the noise transmission of the contactor in the BDU through the arranged sound insulation piece, and has a good use effect.

Description

BDU structure and battery pack

Technical Field

The utility model relates to the technical field of battery break protection devices, in particular to a BDU structure.

The utility model also relates to a battery pack applying the BDU structure.

Background

Along with the rapid increase of the quantity of the vehicles in China, the traditional fuel oil vehicle becomes one of the main sources of environmental pollution in China, and the electric vehicle becomes an important industry for the development of new energy vehicles due to the characteristics of energy conservation and environmental protection. The battery pack is generally placed at the bottom of the electric automobile, and the battery pack emits abnormal sound to influence NVH (Noise, vibration, harshness noise, vibration and harshness for short) performance of the whole automobile.

The noise generated when the electric shock is absorbed on the contactor is mainly generated in the battery pack, the noise cannot be avoided, the noise can be eliminated only by sealing in the BDU, but the heat dissipation of the BDU can be influenced by the sealing of the whole BDU, and the sound can be transmitted out through the shell.

Disclosure of Invention

In view of the above, the present utility model aims to propose a BDU structure that can reduce noise generated by contactors within the BDU.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the BDU structure comprises an upper shell and a lower shell which are connected, wherein an installation space for accommodating a contactor is defined between the upper shell and the lower shell, and a sound insulation piece is arranged at a position, corresponding to the contactor, on the upper shell and/or the lower shell; the contactor is electrically connected with the plug connector on the upper shell or the lower shell through a wiring row.

Further, the opposite large faces of the contactor are disposed toward the upper case and the lower case, respectively.

Further, a fixing portion for fixing the contactor is arranged on the lower shell, and a limiting stop piece for limiting the position of the contactor is arranged on the periphery of the fixing portion.

Further, a plurality of through holes are formed along the circumference of the fixing part, and soundproof cotton is filled in the through holes.

Further, a current sensor is arranged between the upper shell and the lower shell; at least one wiring row penetrates through a through hole in the middle of the current sensor.

Further, the upper shell is connected with the lower shell in a clamping manner, and/or the upper shell is connected with the lower shell in a threaded manner.

Further, the sound insulation piece adopts sound insulation cotton.

Further, the upper shell is provided with a heat dissipation hole.

Further, a plurality of cantilever-shaped connection lugs are arranged on the lower shell, and mounting positions for mounting the lower shell on an external member are arranged on each connection lug.

Compared with the prior art, the utility model has the following advantages:

according to the BDU structure, the upper shell and the lower shell are arranged, so that a better protection effect on the contactor can be achieved, and sound insulation pieces are arranged on the upper shell or the lower shell or on the upper shell and the lower shell at the same time, so that noise transmission caused by the contactor in the BDU can be effectively reduced, and the BDU structure has a good use effect.

In addition, the two opposite large surfaces of the contactor are respectively arranged towards the upper shell and the lower shell, so that the installation stability of the contactor is improved, and the generation of noise can be reduced. The fixed part is arranged on the lower shell, so that the contactor is convenient to fix, and the through holes are formed in the circumferential direction of the fixed part, so that the transmission of the position noise of the fixed point of the contactor is reduced. Meanwhile, the through holes are arranged to be strip holes, so that the area of the holes can be increased while the structural strength of the lower shell is ensured, and the transmission of the position noise of the fixed point of the contactor is further reduced.

In addition, the soundproof cotton filled in the strip holes is beneficial to further absorbing noise transmitted by the contact fixing points and the lower shell. The upper shell and the lower shell are connected by clamping or screwing, so that the convenience of the installation of the upper shell and the lower shell is improved. And the heat dissipation holes arranged on the upper shell are beneficial to heat dissipation in the BDU. And set up cantilever-like connection journal stirrup on lower casing, be favorable to improving the stability of lower casing installation.

Another object of the present utility model is to propose a battery pack in which at least two BDU structures as described above are provided.

The battery pack of the utility model is beneficial to reducing the noise of the battery pack by adopting the BDU structure, and is beneficial to improving the use effect of the battery pack.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a BDU structure according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a lower housing provided with a contactor according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of the lower housing according to the embodiment of the utility model;

FIG. 4 is a schematic view of another view of the lower housing according to the embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of the upper housing according to the embodiment of the present utility model;

reference numerals illustrate:

1. an upper housing; 100. a heat radiation hole; 101. a clamping hole; 102. a connection hole; 2. a lower housing; 201. a protrusion; 202. connecting the lugs; 2021. a fixing hole; 203. a mounting hole; 204. a through hole; 205. a limit stop; 3. a contactor; 4. a connecting piece; 5. a current sensor; 501. a via hole; 10. and (5) soundproof cotton.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The present embodiment relates to a BDU structure to reduce noise generated from contactors within the BDU.

It should be noted that, the BDU is specifically a short for Battery Disconnect Unit battery pack breaking unit, which belongs to one type of high-voltage distribution box.

The BDU structure of this embodiment is shown in fig. 1 in combination with fig. 2 to 5 in terms of overall construction, and mainly includes an upper case 1 and a lower case 2 connected to each other, an installation space for accommodating a contactor 3 is defined between the upper case 1 and the lower case 2, sound insulation members are provided at positions on the upper case 1 and/or the lower case 2 corresponding to the contactor 3, and the contactor 3 is electrically connected to the connectors on the upper case 1 or the lower case 2 through a wiring harness.

In the above structure, the contactor 3 is arranged in the installation space surrounded by the upper shell 1 and the lower shell 2, which is favorable for playing a better protection role on the contactor 3, and the sound insulation piece arranged on the upper shell 1 or the lower shell 2 or on the upper shell 1 and the lower shell 2 at the same time can effectively reduce the noise generated by the contactor 3 in the BDU.

In detail, as shown in fig. 1 to 5, the upper case 1 and the lower case 2 of the present embodiment are connected by a snap fit. Specifically, a card hole 101 is provided on the upper case 1, and a projection 201 is provided on the lower case 2, the projection 201 being snapped into the card hole 101, so that the upper case 1 and the lower case 2 are snapped together. In addition, the upper shell 1 and the lower shell 2 can also be connected by screw connection. At this time, a connection hole 102 may be provided in the upper case 1, and the upper case 1 and the lower case 2 may be screwed together by a screw connection passing through the connection hole 102.

It should be noted that, in this embodiment, the upper casing 1 and the lower casing 2 may be connected only by a clamping manner, may be connected only by a screwing manner, and may also be connected by both a clamping manner and a screwing manner.

As a preferred embodiment of the present embodiment, the contactor 3 of the present embodiment is mounted in a structure in which the opposite large faces of the contactor 3 are disposed toward the upper case 1 and the lower case 2, respectively, which is advantageous in that the mounting stability of the contactor 3 is improved, and thus the generation of noise can be reduced.

The contactor 3 of the present embodiment is specifically mounted on the lower housing 2, and as shown in fig. 2, a fixing portion for fixing the contactor 3 is provided on the lower housing 2, and a limit stopper 205 for limiting the position of the contactor 2 is provided on the outer periphery of the fixing portion, so as to facilitate improvement of the stability of the mounting of the contactor. In particular, the limiting stopper 205 may be a U-shaped limiting stopper as shown in fig. 2, and it will be understood that other structures of the limiting stopper 205 may be adopted according to practical situations.

In the present embodiment, a plurality of through holes 204 are provided along the circumferential direction of the fixing portion. The fixing portion is specifically the mounting hole 203, that is, a plurality of through holes 204 are formed in the circumferential direction of the mounting hole 203, which is beneficial to reducing the propagation of noise at the fixing point of the contactor 3.

As a preferred embodiment, the through holes 204 in this embodiment are plural arranged along the circumferential direction of each mounting hole 203, and the plural through holes 204 are elongated holes. The area of the opening can be increased while the structural strength of the lower housing 2 is ensured, and the propagation of the position noise of the fixed point of the contactor 3 can be further reduced.

As a further preferred implementation of the present embodiment, in the present embodiment, each through hole 204 is filled with the soundproof cotton 10, so as to further absorb noise propagated from the contact fixing point and the lower case.

In this embodiment, the soundproof member is preferably made of soundproof cotton 10. Further, in this embodiment, soundproof cotton 10 is bonded to each of the upper case 1 and the lower case 2 corresponding to the mounting position of the contactor 3.

In order to facilitate heat dissipation of electrical components inside the BDU, in this embodiment, the upper housing 1 is provided with heat dissipation holes 100, which facilitate heat dissipation inside the BDU.

In addition, in this embodiment, as shown in fig. 2, a current sensor 5 is further disposed between the upper housing 1 and the lower housing 2, and the at least one wiring harness penetrates through a via 501 in the middle of the current sensor 5, so as to facilitate detection of current information on the wiring harness. In particular, the current sensor 5 of the present embodiment is fixed in the lower case 2 side by side with the contactor 3.

In the present embodiment, a plurality of hanging connection lugs 202 are provided on the lower case 2, and each connection lug 202 is provided with a mounting position for mounting the lower case 2 on an external member. Specifically, as shown in fig. 1 to 4, the connection lugs 202 are formed on the outer wall of the lower housing 2 and are provided in a suspended state at the middle position in the height direction of the lower housing 2, and the mounting positions specifically include mounting holes 2021 formed on the connection lugs, and as a preferred embodiment, the mounting holes 2021 are three arranged at intervals along the circumferential direction of the lower housing 2. The arrangement of the connection lugs 202 and the mounting holes 2021 is advantageous in improving the stability of the mounting of the lower case 2, and can further reduce the generation of noise.

The external member may be, for example, a lower case of a battery pack, or may be a mounting member for mounting the BDU in other cases.

The BDU structure of the embodiment can effectively reduce noise transmission of the BDU inner contactor 3 and has good use effect.

In addition, the present embodiment also relates to a battery pack in which at least two BDU structures as described above are provided. The BDU structure is particularly mountable on the lower shell of the battery pack, and the two contactors are separately disposed, so that interference can be avoided and resonance caused by the arrangement can be prevented.

The battery pack of this embodiment is favorable to reducing the noise of battery pack through adopting foretell BDU structure, and is favorable to improving the result of use of battery pack.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A BDU structure characterized by:

the device comprises an upper shell (1) and a lower shell (2) which are connected, wherein an installation space for accommodating a contactor (3) is defined between the upper shell (1) and the lower shell (2), and sound insulation pieces are arranged at positions, corresponding to the contactor (3), on the upper shell (1) and/or the lower shell (2); the contactor (3) is electrically connected with the connector on the upper shell (1) or the lower shell (2) through a wiring row.

2. A BDU structure according to claim 1 characterized in that:

the two opposite large faces of the contactor (3) are respectively arranged towards the upper shell (1) and the lower shell (2).

3. A BDU structure according to claim 1 characterized in that:

the lower shell (2) is provided with a fixing part for fixing the contactor (3), and the periphery of the fixing part is provided with a limiting stop piece (205) for limiting the position of the contactor (3).

4. A BDU structure according to claim 3 wherein: a plurality of through holes (204) are formed along the circumferential direction of the fixing part; and sound insulation cotton (10) is filled in the through holes (204).

5. A BDU structure according to claim 1 characterized in that: a current sensor (5) is arranged between the upper shell (1) and the lower shell (2); at least one of the wiring rows extends through a via (501) in the middle of the current sensor (5).

6. A BDU structure according to claim 1 characterized in that:

the upper shell (1) is connected with the lower shell (2) in a clamping way, and/or the upper shell (1) is connected with the lower shell (2) in a threaded way.

7. A BDU structure according to claim 1 characterized in that:

the sound insulation piece adopts sound insulation cotton (10).

8. A BDU structure according to claim 1 characterized in that:

and the upper shell (1) is provided with a heat dissipation hole (100).

9. A BDU structure according to any one of claims 1 to 8 characterized in that:

the lower shell (2) is provided with a plurality of hanging connecting lugs (202), and each connecting lug (202) is provided with a mounting position for mounting the lower shell (2) on an external member.

10. A battery pack, characterized in that:

the battery pack is provided therein with at least two BDU structures as set forth in any one of claims 1 to 9.