CN220420776U

CN220420776U - BDU and BMU integrated structure for power battery

Info

Publication number: CN220420776U
Application number: CN202322059397.9U
Authority: CN
Inventors: 丁潇潇
Original assignee: Anhui Ningsheng Automotive Parts Co ltd
Current assignee: Anhui Ningsheng Automotive Parts Co ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-01-30
Anticipated expiration: 2033-08-02

Abstract

The utility model relates to a BDU and BMU integrated structure for a power battery, which belongs to the technical field of power batteries and comprises a battery management unit, a shielding component and a battery cutting unit, wherein the battery cutting unit comprises an upper shell and a lower shell, both sides of the lower shell are respectively provided with a side structure, the side structures are respectively provided with a mounting hole, the inner bottom of the lower shell and one of the side structures are respectively provided with a mounting column, the upper shell is provided with a through hole corresponding to the mounting column, the upper shell is sleeved on the mounting columns through the through hole, the upper shell is in buckle connection with the lower shell, the shell is provided with a connecting hole, the connecting hole is penetrated through the shell through a bolt to connect the mounting columns, the shielding component is positioned between the battery management unit and the battery cutting unit, the BDU and the BMU are stacked, the structure is small in water surface occupied area, the shielding layer is arranged, the whole height is tightly attached, the strength is high, and the safety is high.

Description

BDU and BMU integrated structure for power battery

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to a BDU and BMU integrated structure for a power battery.

Background

With the promotion of the pursuit of automobile batteries for energy density, the volume ratio of the batteries in a battery PACK assembly (hereinafter referred to as PACK) is higher and higher, and the space reserved for other modules and components is smaller and smaller. The problem of how to solve the problems of electrical safety, electromagnetic interference and the like brought by effectively utilizing the residual space in the PACK becomes a key concern.

The battery management unit (hereinafter referred to as BMU) is generally a flat cuboid, and can effectively utilize PACK height space when vertically installed in the PACK lower case. However, vertical mounting may cause a fault in the flow of condensate water along the beam into the BMU, so that the BMU can only be mounted horizontally on the PACK lower housing. More horizontal space is occupied during horizontal installation, and meanwhile, the height space is wasted.

The battery shut-off unit (hereinafter referred to as BDU) has no fixed shape. The height is generally dependent upon the internal relay height, and internal component selection in combination with the high voltage architecture determines the horizontal boundary and is generally greater than the horizontally mounted BMU. There is a certain space left in height.

Separate installation of the BDU and the BMU may result in insufficient space in the PACK, and project design cannot be completed.

The integrated installation unit of BDU + BMU of the same kind installs BMU on BDU upper casing, and BDU upper casing rethread screw installs on BDU lower casing, and BDU lower casing installs again on PACK lower casing, and the structure is complicated, and the switching is too much, and vibration resistance performance is lower. To reduce electromagnetic interference, the BMU is lifted off the BDU very high, resulting in insufficient PACK height space.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The present utility model aims to provide a BDU and BMU integrated structure for a power battery to solve the problems described in the background art.

2. Technical proposal

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

the utility model relates to a BDU and BMU integrated structure for a power battery, which comprises a battery management unit, a shielding component and a battery cutting unit, wherein the battery cutting unit comprises an upper shell and a lower shell, both sides of the lower shell are respectively provided with a side structure, the side structures are provided with mounting holes, the inner bottom of the lower shell and one of the side structures are respectively provided with a mounting column, the upper shell is provided with a through hole corresponding to the mounting column, the upper shell is sleeved on the mounting columns through the through hole, the upper shell is in buckle connection with the lower shell, a connecting hole is formed in a shell of the battery management unit, the shell passes through the connecting hole to be connected with the mounting columns through bolts, and the shielding component is positioned between the battery management unit and the battery cutting unit.

Preferably, the mounting column comprises an outer column structure and a step nut, a hexagonal hole is formed in the outer column structure, the step nut is mounted in the hexagonal hole, and the outer column structure and the lower shell are integrally formed.

Preferably, the shielding assembly comprises a shielding layer plate and a connecting lug, the connecting lug is positioned on one side of the shielding layer plate, a through hole is formed in the connecting lug, the shielding assembly is sleeved on the mounting column through the through hole, the upper end face of the shielding layer plate is in contact with the bottom face of the battery management unit, and the lower end face of the shielding layer plate is in contact with the top face of the upper shell of the battery cutting unit.

Preferably, the shell is provided with a wire slot structure, and the battery management unit is pressed on the wire slot structure.

Preferably, the area of the battery management unit is smaller than the area of the battery shut-off unit.

Preferably, the outer column structure is a hollow structure.

Preferably, the shell of the battery management unit comprises a top shell and a bottom shell, the top shell is spliced with the bottom shell, two sides of the bottom shell comprise U-shaped structural members, and the connecting holes are formed in the U-shaped structural members.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

according to the BDU and BMU integrated structure for the power battery, the BDU and the BMU are installed in a stacked mode, the occupied area of the water surface of the structure is small, the shielding layer is arranged, the whole BDU and the BMU integrated structure are tightly attached, and the BDU and the BMU integrated structure is high in strength and safety.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a BDU and BMU integrated structure for a power cell according to the utility model;

fig. 2 is a schematic diagram of a battery cutoff unit for a BDU and BMU integrated structure of a power battery according to the present utility model.

Reference numerals in the schematic drawings illustrate:

100. a battery management unit; 110. a connection hole; 120. a U-shaped structural member;

200. a shielding assembly; 210. a shielding laminate; 220. a connecting lug;

300. a battery cutoff unit; 310. an upper housing; 311. a trunking structure; 320. a lower housing; 321. a side structure; 330. a mounting column; 331. an outer column structure; 332. a step nut.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

Referring to fig. 1-2, a BDU and BMU integrated structure for a power battery of this embodiment, including a battery management unit 100, a shielding component 200 and a battery cutting unit 300, the battery cutting unit 300 includes an upper housing 310 and a lower housing 320, both sides of the lower housing 320 are provided with side structures 321, a mounting hole is provided on the side structures 321, the inner bottom of the lower housing 320 and one of the side structures 321 are provided with mounting posts 330, the upper housing 310 is provided with through holes corresponding to the positions of the mounting posts 330, the upper housing 310 is sleeved on the mounting posts 330 through the through holes, the upper housing 310 and the lower housing 320 are in snap connection, a connecting hole 110 is provided on the housing of the battery management unit 100, the housing passes through the connecting hole 110 through the connecting post 330 through bolts, the shielding component 200 is located between the battery management unit 100 and the battery cutting unit 300, the structure of this design, through integrating the mounting posts 330 on the lower housing 320 of the battery management unit 100, for mounting the battery management unit 100, wherein the battery management unit 100 is directly mounted on the mounting posts 330, the upper housing 310 does not participate in supporting, the compression to the upper housing 310 is reduced, the whole structure is more stable, the mounting space of the upper housing 310 is more stable, the installation space of the battery management unit is more stable, the whole is more stable, the installation space is more space is required than the conventional, the installation space is more stable, and the installation space is more space is occupied, and more stable, the safety is occupied, and the safety is more space is occupied, and more is more stable, compared with the installation space can and the installation space is more can be more stable.

The mounting post 330 of this embodiment includes outer post structure 331 and step nut 332, is equipped with the hexagon hole on the outer post structure 331, and step nut 332 installs in the hexagon downthehole, outer post structure 331 and lower casing 320 integrated into one piece, under the prerequisite of fully considering space utilization and structural strength, with outer post structure 331 and lower casing 320 integrated into one piece design, holistic structural strength has ensured, and the deformability promotes.

The shielding assembly 200 of this embodiment includes a shielding laminate 210 and a connecting lug 220, the connecting lug 220 is located at one side of the shielding laminate 210, a through hole is provided on the connecting lug 220, the shielding assembly 200 is sleeved on a mounting post 330 through the through hole, the upper end surface of the shielding laminate 210 contacts with the bottom surface of the battery management unit 100, the lower end surface of the shielding laminate 210 contacts with the top surface of the upper housing 310 of the battery cutting unit 300, the shielding laminate 210 performs electromagnetic shielding, electromagnetic interference is avoided, the structural form of the shielding laminate 210 is not limited, and corresponding shapes are made according to the area to be shielded on the upper housing 310 of the battery cutting unit 300.

The upper housing 310 of the present embodiment is provided with a wire slot structure 311, and the battery management unit 100 is pressed on the wire slot structure 311, and the designed structure is used for wiring and also used for dividing the upper housing 310.

The battery management unit 100 of the present embodiment has an area smaller than that of the battery shut-off unit 300.

The outer column structure 331 of the present embodiment is a hollow structure, and it should be noted that a portion of the outer column structure 331 is connected with the side wall of the lower housing 320, and the outer column structure 331 can not only serve as a supporting structure to support the battery management unit 100, but also can strengthen the side wall of the lower housing 320, thereby improving the deformation resistance of the lower housing 320 and having high safety.

The shell of the battery management unit 100 of this embodiment includes top shell and bottom shell, and top shell and bottom shell peg graft, and the both sides of bottom shell include U type structure 120, and connecting hole 110 is located U type structure 120, and this design structure, the intensity of U type structure 120 is higher for the stability of connection is stronger, and the anti deformability is stronger, and the security is higher.

The foregoing examples merely illustrate certain embodiments of the utility model and are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that it is possible for a person skilled in the art to make several variants and modifications without departing from the concept of the utility model, all of which fall within the scope of protection of the utility model; accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A BDU and BMU integrated structure for a power cell, characterized by: including battery management unit (100), shielding subassembly (200) and battery cutting off unit (300), battery cutting off unit (300) is including last casing (310) and lower casing (320), the both sides of lower casing (320) all are equipped with side structure (321), be equipped with the mounting hole on side structure (321), the inner bottom of lower casing (320) with one of them all be equipped with erection column (330) on side structure (321), be equipped with the through-hole that corresponds with erection column (330) position on going up casing (310), go up casing (310) through the through-hole cover on erection column (330), go up casing (310) and lower casing (320) buckle and connect, be equipped with connecting hole (110) on the shell of battery management unit (100), the shell passes connecting hole (110) and connects erection column (330) through the bolt, shielding subassembly (200) are located between battery management unit (100) and battery cutting off unit (300).

2. A BDU and BMU integrated structure for a power cell according to claim 1, wherein: the mounting column (330) comprises an outer column structure (331) and a step nut (332), a hexagonal hole is formed in the outer column structure (331), the step nut (332) is mounted in the hexagonal hole, and the outer column structure (331) and the lower shell (320) are integrally formed.

3. A BDU and BMU integrated structure for a power cell according to claim 1, wherein: the shielding assembly (200) comprises a shielding layer plate (210) and a connecting lug (220), wherein the connecting lug (220) is located on one side of the shielding layer plate (210), a through hole is formed in the connecting lug (220), the shielding assembly (200) is sleeved on a mounting column (330) through the through hole, the upper end face of the shielding layer plate (210) is in contact with the bottom face of the battery management unit (100), and the lower end face of the shielding layer plate (210) is in contact with the top face of an upper shell (310) of the battery cutting unit (300).

4. A BDU and BMU integrated structure for a power cell according to claim 1, wherein: the upper shell (310) is provided with a wire groove structure (311), and the battery management unit (100) is pressed on the wire groove structure (311).

5. A BDU and BMU integrated structure for a power cell according to claim 1, wherein: the area of the battery management unit (100) is smaller than the area of the battery shut-off unit (300).

6. A BDU and BMU integrated structure for a power cell according to claim 2, wherein: the outer column structure (331) is a hollow structure.

7. A BDU and BMU integrated structure for a power cell according to claim 1, wherein: the shell of the battery management unit (100) comprises a top shell and a bottom shell, the top shell is spliced with the bottom shell, two sides of the bottom shell comprise U-shaped structural members (120), and the connecting holes (110) are formed in the U-shaped structural members (120).