CN219269246U - Lightweight BMS shell - Google Patents

Abstract

The utility model relates to the technical field of batteries for electric vehicles, in particular to a lightweight BMS shell. It includes a detachably connected upper case cover and a base, a cavity for installing a circuit board is provided between the base and the upper case cover, the base is a flat plate structure, and the base is embedded in the upper case cover The bottom edge of the bottom of the base is provided with several reinforcement ribs, and several reinforcement ribs are arranged vertically and horizontally in the second groove. Due to the pursuit of light weight of the BMS shell, the material of the shell was replaced with insulating material. On this basis, in order to avoid the defect of strength drop caused by the change of the material of the BMS shell, some improvements were made to the BMS shell. The method is used to assemble the upper case cover. Secondly, the bottom of the base is designed to cooperate with the groove and the reinforcement rib to jointly improve the strength of the case.

Description

A lightweight BMS shell

technical field

The utility model relates to the technical field of batteries for electric vehicles, in particular to a lightweight BMS shell.

Background technique

Battery management system (Battery management system), referred to as BMS, is the link between the battery and the user, and it is also the core part of battery management. Since the BMS is used to install on the shell of the battery cell, its installation space and installation direction are limited. Controlled by the overall structure of the battery, the shell of the battery management system (BMS) presents a diversified and diverse structure.

The structure of most shells has defects such as large volume, cumbersome installation between the upper and lower shells, and low strength of the BMS shell due to shell structural design factors. Especially in the trend of lightweight, BMS shells tend to use insulating materials. This makes it difficult to control the strength of the BMS shell.

Utility model content

The purpose of the utility model is to provide a lightweight BMS shell for the technical defect of the prior art that the strength of the BMS shell itself is difficult to control under the trend of light weight.

In order to achieve the above object, the technical solution adopted by the utility model is:

A lightweight BMS shell, comprising a detachably connected upper shell cover and a base, a cavity for installing a circuit board is provided between the base and the upper shell cover, the BMS shell is made of insulating material, and the base It is a flat plate structure, the base is embedded in the bottom edge of the upper case cover, the bottom of the base is provided with a second groove, the second groove is recessed toward the cavity side, and the second recess The groove has a rectangular structure, and several reinforcing ribs are arranged in the second groove, and several reinforcing ribs are arranged vertically and horizontally in the second groove.

In the technical solution of the utility model, the material of the shell of the BMS is replaced with an insulating material for the purpose of lightening the shell. The improvement of the base is firstly assembled with the upper case cover by embedding the base, and secondly, a groove and a reinforcement rib are designed at the bottom of the base to cooperate with each other to enhance the strength of the case.

As a preferred solution of the present utility model, the four top corners of the upper case cover are respectively provided with first grooves recessed toward one side of the cavity, and each of the first grooves is respectively provided with a mounting sleeve , the mounting sleeve is used to install a first fastening screw, and the BMS shell is fixed to other devices through the first fastening screw. On the one hand, the design of the first groove of the upper case cover can improve the strength of the upper case cover, and on the other hand, by setting the first groove, the connection ear of the BMS case in the prior art used to fix the battery pack is skillfully transferred to the BMS On the shell body, no additional space is occupied by the shell. A compact case structure is realized.

As a preferred solution of the present invention, a mounting seat is provided under the first groove, and the mounting sleeve is nested in the mounting seat. The height of the first groove and the height of the mounting seat jointly form the height of the upper case cover.

As a preferred solution of the present utility model, the four top corners of the base are respectively provided with first notches, the four top corners of the circuit board are provided with second notches, and the first notches and the second notches are both It is fan-shaped structure. During the assembly process of the base and the upper case cover, the base is embedded in the upper case cover and is in the same plane as the opening edge of the upper case cover.

As a preferred solution of the present invention, the edges of the first notch and the second notch are respectively matched with the bottom of the mounting base.

The base is a flat plate structure, at least two first positioning columns are arranged on the top surface of the base near the end, and at least two second positioning columns are arranged on the upper cover, and the second positioning columns are connected with the The positions of the first positioning posts are set correspondingly.

As a preferred solution of the present utility model, at least two positioning holes are arranged on the circuit board, and the circuit board is arranged between the first positioning column and the second positioning column; And the upper part goes through the first positioning post, the positioning hole and the second positioning post in order to realize the assembly of the BMS shell.

As a preferred solution of the present utility model, at least two auxiliary positioning posts are arranged on the upper case cover, and the auxiliary positioning posts are arranged along the diagonal direction of the upper case cover; correspondingly, on the circuit board An auxiliary positioning hole is provided, and the position of the auxiliary positioning hole coincides with the position of the orthographic projection of the auxiliary positioning column. During the installation process, the auxiliary positioning column penetrates from the front of the circuit board to the aspect of the circuit board to further define the position of the circuit board.

As a preferred solution of the present invention, the upper case cover and the base are made of insulating plastic. The purpose is that the plastic material is insulating material, and by using the insulating material shell, the volume of the BMS shell can be further reduced, making the whole structure of the BMS shell more compact. Preferably, the distance between the circuit board and the inner wall of the upper case cover does not exceed 2mm; on the premise that the volume of the circuit board is determined, when the distance between the upper case cover and the circuit board does not exceed 2mm, the The volume of the upper shell cover is smaller than that of the existing metal shell structure, which makes the BMS shell of the present invention more dexterous, and the internal structure of the BMS shell is more compact.

As a preferred solution of the present invention, an opening is provided on the side wall of the upper case cover, and the opening is used for a signal interface of the circuit board. The opening of the upper case cover is a closed structure, which ensures the integrity of the circumferential side wall of the upper case cover.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

1. In the technical solution of the utility model, the material of the BMS shell is replaced with an insulating material due to the pursuit of light weight. Some improvements have been made. First, the base is embedded with the upper case cover for assembly. Second, grooves and reinforcement ribs are designed at the bottom of the base to cooperate with each other to enhance the strength of the case.

2. In the technical solution of the utility model, the design of the first groove of the upper case cover can improve the strength of the upper case cover on the one hand, and on the other hand, the BMS case in the prior art can be used with the battery by setting the first groove. The fixed connection ear of the package is cleverly transferred to the body of the BMS shell, which does not occupy additional space of the shell. A compact and lightweight case structure is realized.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a structural explosion schematic diagram of the utility model;

Fig. 3 is a structural schematic diagram of the bottom perspective of the utility model;

Fig. 4 is the structural representation of the base of the utility model;

Fig. 5 is a schematic structural view of the upper case cover of the present invention;

Icons: 1-upper case cover; 11-opening, 2-base; 21-first notch, 3-circuit board; 31-second notch, 4-first groove, 41-installation seat, 5-installation sleeve, 6-first fastening screw, 7-first positioning post, 8-second positioning post, 9-positioning hole, 10-second fastening screw, 12-second groove, 13-reinforcing rib, 14-auxiliary Positioning post, 15-auxiliary positioning hole.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

A lightweight BMS shell, as shown in Figures 1-5, includes a detachably connected upper shell cover 1 and a base 2, and the overall structure of the BMS shell is made of insulating plastic material. A cavity for installing a circuit board 3 is provided between the base 2 and the upper case cover 1, and an opening 11 is provided on the side wall of the upper case cover 1, and the opening 11 is used for the signal of the circuit board 3. interface. The four top corners of the upper case cover 1 are respectively provided with first grooves 4 that are recessed toward one side of the cavity, and each of the first grooves 4 is respectively provided with a mounting sleeve 5, specifically, A mounting seat 41 is disposed below the first groove 4 , and the mounting sleeve 5 is nested in the mounting seat 41 . The installation sleeve 5 is used for installing the first fastening screw 6, and the fixing of the BMS shell and the battery pack shell is realized through the first fastening screw 6.

The base 2 is a flat plate structure, at least two first positioning columns 7 are provided on the top surface of the base 2 near the end, and at least two second positioning columns 8 are provided on the upper case cover 1. The second positioning column 8 is set corresponding to the position of the first positioning column 7 . The circuit board 3 is provided with at least two positioning holes 9, and the circuit board 3 is arranged between the first positioning column 7 and the second positioning column 8; the second fastening screw 10 is from bottom to top The assembly of the BMS shell is realized through the first positioning post 7 , the positioning hole 9 and the second positioning post 8 in sequence. The upper case cover 1 is also provided with at least two auxiliary positioning posts 14, and the auxiliary positioning posts 14 are arranged along the diagonal direction of the upper case cover 1; correspondingly, the circuit board 3 is provided with auxiliary positioning posts 14. The position of the positioning hole 15 and the position of the auxiliary positioning hole 15 coincide with the position of the orthographic projection of the auxiliary positioning post 14 . During the installation process, the auxiliary positioning column 14 penetrates from the front side of the circuit board 3 to the back side of the circuit board 3 to further define the position of the circuit board 3 .

The four corners of the base 2 are respectively provided with a first notch 21, and the four corners of the circuit board 3 are provided with a second notch 31, the first notch 21 and the second notch 31 are fan-shaped structure, the edges of the first notch 21 and the second notch 31 are respectively matched with the bottom of the mounting base 41 . During the assembly process of the base 2 and the upper case cover 1 , the base 2 is embedded in the upper case cover 1 and is in the same plane as the edge of the opening of the upper case cover 1 .

Further, the bottom of the base 2 is provided with a second groove 12, the second groove 12 is recessed toward the side of the cavity, and the second groove 12 has a rectangular structure. Several reinforcing ribs 13 are arranged in the second groove 12 , and several reinforcing ribs 13 are arranged vertically and horizontally in the second groove 12 . The strength of the BMS shell base 2 can be further improved by setting the second groove 12 and the matching rib 13 .

In this embodiment, the upper cover 1 and the base 2 are made of insulating plastic. The purpose is that the plastic material is an insulating material, and by using the shell made of insulating material, while realizing the weight reduction of the shell, the volume of the BMS shell can be further reduced, so that the entire structure of the BMS shell is more compact. Preferably, the distance between the circuit board 3 and the inner wall of the upper case cover 1 does not exceed 2mm; on the premise that the volume of the circuit board 3 is determined, when the distance between the upper case cover 1 and the circuit board 3 is not When it exceeds 2 mm, the volume of the upper shell cover 1 is smaller than that of the existing metal shell structure, which makes the BMS shell of the present invention more dexterous and the internal structure of the BMS shell more compact.

The BMS shell structure of this embodiment, because the whole is made of plastic material, greatly reduces its own weight. By designing the reinforcement ribs on the base 2, the groove design at the top corner of the upper shell cover 1, and the connection between the base 2 and the upper shell cover 1 The built-in combination method ensures the strength of the BMS shell in many ways. Realized the BMS shell with high strength, light weight and small volume.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A lightweight BMS shell, comprising a detachably connected upper case cover (1) and a base (2), between the base (2) and the upper case cover (1) there is a circuit board ( 3) cavity, characterized in that the BMS shell is made of insulating material, the base (2) is a flat plate structure, and the base (2) is embedded in the bottom edge of the upper case cover (1), so The bottom of the base (2) is provided with a second groove (12), the second groove (12) is recessed toward the cavity side, and several reinforcing ribs are arranged in the second groove (12) (13), a plurality of reinforcing ribs (13) arranged vertically and horizontally in the second groove (12). 2. The lightweight BMS shell according to claim 1, characterized in that, the four top corners of the upper shell cover (1) are respectively provided with first grooves (4) that are recessed toward the cavity side ), each of the first grooves (4) is respectively provided with a mounting sleeve (5), the mounting sleeve (5) is used to install the first fastening screw (6), through the first fastening screw (6) Realize the fixing of the BMS shell and other equipment. 3. The lightweight BMS shell according to claim 2, characterized in that, a mounting seat (41) is provided under the first groove (4), and the mounting sleeve (5) is nested in the mounting in the seat (41). 4. The lightweight BMS shell according to claim 3, characterized in that the four top corners of the base (2) are respectively provided with first notches (21), and the four top corners of the circuit board (3) are A second notch (31) is provided at the corner, and both the first notch (21) and the second notch (31) are fan-shaped. 5. The lightweight BMS shell according to claim 4, characterized in that, the edges of the first notch (21) and the second notch (31) are respectively matched with the bottom of the mounting seat (41). 6. The lightweight BMS shell according to any one of claims 1-5, characterized in that at least two first positioning columns (7) are provided on the top surface of the base (2) near the end, so that At least two second positioning columns (8) are arranged on the upper case cover (1), and the second positioning columns (8) are arranged correspondingly to the positions of the first positioning columns (7). 7. The lightweight BMS housing according to claim 6, characterized in that at least two positioning holes (9) are provided on the circuit board (3), and the circuit board (3) is provided on the first Between the positioning post (7) and the second positioning post (8); the second fastening screw (10) passes through the first positioning post (7), the positioning hole (9), the second fastening screw (10) sequentially from bottom to top Two positioning columns (8) realize the assembly of the BMS shell. 8. The lightweight BMS shell according to claim 6, characterized in that an opening (11) is provided on the side wall of the upper shell cover (1), and the opening (11) is used to expose the circuit board (3 ) signal interface. 9. The lightweight BMS shell according to claim 6, characterized in that at least two auxiliary positioning posts are arranged on the upper case cover (1), and the auxiliary positioning posts are arranged along the upper case cover (1) ) is set in the diagonal direction. 10. The lightweight BMS shell according to claim 9, characterized in that, the circuit board (3) is provided with an auxiliary positioning hole, and the position of the auxiliary positioning hole is mutually related to the orthographic projection position of the auxiliary positioning column. coincide.

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