Battery module box

Abstract

The utility model relates to a battery module box in the technical field of battery modules, which comprises a shell and a plurality of battery cells in the shell, the shell is internally provided with an inner cavity for placing the battery cells, the inner wall of the inner cavity close to a battery cell pole is provided with a confluence piece, the confluence piece is used for electrically connecting the plurality of battery cells, the front end of the shell is a pole end for external power supply, and the front end of the shell is connected with the battery cell. An extension pole piece protruding outwards is arranged at the end part of the confluence piece, a plurality of extension grooves are formed in the pole end, the extension grooves and the inner cavity are of a conducting structure, and the middle part of the extension pole piece penetrates through the extension grooves and is fixedly attached to the surface of the pole end. The extending pole pieces and the confluence pieces form an integrated structure, so that the situation that the welding quality between the connecting pole columns and the confluence pieces is unstable is avoided, and the stability of electrical connection of the battery module box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, specifically a battery module box. Background Art

[0002] A battery module is a battery combination in which battery monomers are connected in series, parallel or series-parallel, and has only a pair of positive and negative output terminals. It also includes components such as a housing, a management and protection device, etc.

[0003] According to the existing Chinese invention patent with the publication number CN111279522A, it records a battery module and a battery pack with a bus bar, which improves weldability by reducing current loss during welding between the bus bar and the electrode terminal of the cylindrical battery unit; and a battery pack including the battery module.

[0004] In the existing battery modules, generally, multiple battery cells are connected in series and parallel through bus bars or bus bars, and the bus bars are welded to the connection posts provided on the housing of the battery module to complete the assembly of the entire battery module. The electrical connection stability between the connection posts and the bus bars generally depends on the welding quality and strength between the two. Therefore, in view of these current situations, it is urgent to develop a battery module box to meet the actual use needs. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a battery module box, which is used to reduce the defect that the battery module is open-circuited due to poor welding quality between the connection posts and the bus bars.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0007] The battery module box includes a housing and several battery cells inside the housing. The inside of the housing is an inner cavity for placing the battery cells. A bus bar is provided on the inner wall of the inner cavity close to the electrode posts of the battery cells. The bus bar is used for electrically connecting several battery cells. The front end of the housing is a post end for external power supply. The end of the bus bar is provided with an outwardly protruding extension tab. Several extension slots are opened in the post end. The extension slots are in a conductive structure with the inner cavity. The middle part of the extension tab passes through the extension slot and is attached and fixed to the surface of the post end.

[0008] In the above description, as a further solution, connection holes for connecting external terminals are opened on the surface of the post end. Insertion holes matching the connection holes are opened at the ends of the extension tabs. The middle part of the extension tab is bent towards the surface of the post end to form an "L" - shaped structure, and the connection holes and the insertion holes coincide.

[0009] In the above description, as a further solution, the inner wall of the connection hole is provided with an internal thread structure for connecting external terminals.

[0010] In the above description, as a further solution, two extended pole pieces are provided. The two extended pole pieces are symmetrically arranged on the side walls of the inner cavity close to the battery cell pole columns respectively.

[0011] In the above description, as a further solution, a plurality of battery grooves are provided on both the top end face and the bottom end face of the inner cavity. The cross section of the battery groove is an arc-shaped structure. The plurality of battery grooves are arranged in a linear array structure, and a plurality of battery cells are sequentially embedded in the inner walls of the battery grooves.

[0012] In the above description, as a further solution, a plurality of "gully"-shaped card slots are provided on both side edges of the extended pole piece, and the extended pole piece cooperates with the battery groove through the card slots.

[0013] In the above description, as a further solution, one end face of the housing is a detachable cover body. A long strip-shaped buckle groove is provided at one end of the cover body, and a buckling rib matching the buckle groove is provided at one end of the housing. The buckling rib is buckled and connected with the buckle groove.

[0014] In the above description, as a further solution, a plurality of clearance holes are opened at one end of the cover body away from the buckle groove, and a matching fixing threaded hole is opened at one end of the housing close to the clearance holes. The cover body is fixed by screwing a fixing bolt through the clearance holes and the fixing threaded holes.

[0015] The beneficial effects produced by the present utility model are as follows:

[0016] For the battery module box of the present application, the end of the bus bar is provided with an extended pole piece protruding outwards. At the same time, an inner cavity communicating with the inner cavity is opened at the front end of the housing. The middle part of the extended pole piece passes through the extended groove and is attached and fixed to the surface of the pole column end. This structure reduces the input of parts for connecting the pole columns, forms an integrated structure between the extended pole piece and the bus bar, avoids the unstable welding quality between the connecting pole column and the bus bar, and improves the stability of the electrical connection of the battery module box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the battery module box described in the present utility model;

[0018] Figure 2 is an exploded structural schematic diagram of the battery module box described in the present utility model;

[0019] Figure 3 is Figure 2 a partial enlarged structural schematic diagram of B in

[0020] Figure 4 is a sectional structural schematic diagram of the battery module box described in the present utility model at a first angle;

[0021] Figure 5 For Figure 4 the partial enlarged structural schematic diagram of C in

[0022] Figure 6 the sectional structural schematic diagram of the battery module box of the present utility model from a second angle;

[0023] In the figure: 1 - housing, 11 - inner cavity, 111 - battery slot, 12 - extension slot, 13 - connection hole, 131 - internal thread, 14 - fixing threaded hole, 15 - snap rib, 2 - cover, 21 - clearance hole, 22 - snap groove, 3 - bus bar, 31 - extension pole piece, 311 - insertion hole, 32 - card slot, 4 - fixing bolt, 5 - external connection terminal. Specific embodiments

[0024] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below with reference to the accompanying drawings.

[0025] Please refer to Figures 1-6 , the battery module box implemented specifically includes a housing 1 and several battery cells inside the housing 1. The inside of the housing 1 is an inner cavity 11 for placing the battery cells. A bus bar 3 is provided on the inner wall of the inner cavity 11 close to the pole columns of the battery cells. The bus bar 3 is used for electrically connecting several battery cells. The front end of the housing 1 is a pole column end for external power supply. An outwardly protruding extension pole piece 31 is provided at the end of the bus bar 3. Several extension slots 12 are opened at the pole column end. The extension slots 12 and the inner cavity 11 are in a conductive structure. The middle part of the extension pole piece 31 passes through the extension slot 12 and is fixedly attached to the surface of the pole column end; One end face of the housing 1 is a detachable cover 2. A long strip-shaped snap groove 22 is provided at one end of the cover 2. A snap rib 15 matching the snap groove 22 is provided at one end of the housing 1. The snap rib 15 and the snap groove 22 are snap-connected. Several clearance holes 21 are opened at the end of the cover 2 away from the snap groove 22. A matching fixing threaded hole 14 is opened at the end of the housing 1 close to the clearance holes 21. The cover 2 is fixedly threaded through the clearance holes 21 with the fixing bolt 4 and the fixing threaded hole 14.

[0026] An outwardly protruding extension pole piece 31 is provided at the end of the bus bar 3. At the same time, an inner cavity 11 with an extension slot 12 that is in mutual conduction with the inner cavity 11 is opened at the front end of the housing 1. The middle part of the extension pole piece 31 passes through the extension slot 12 and is fixedly attached to the surface of the pole column end. This structure reduces the parts investment for connecting the pole columns, forms an integrated structure between the extension pole piece 31 and the bus bar 3, avoids the unstable welding quality between the connecting pole column and the bus bar 3, and improves the stability of the electrical connection of the battery module box.

[0027] In a further scheme, such asFigures 3-5 As shown in the figure, a connection hole 13 for connecting an external terminal is formed on the surface of the pole column end. A plug hole 311 matching the connection hole 13 is formed at the end of the extended pole piece 31. The middle part of the extended pole piece 31 is bent towards the surface of the pole column end to form an "L" - shaped structure, and the connection hole 13 coincides with the plug hole 311. An internal thread 131 structure for connecting an external terminal is provided on the inner wall of the connection hole 13.

[0028] When the external connection terminal 5 is electrically connected to the battery module box, the external connection terminal 5 is passed through the plug hole 311 and thread - connected to the connection hole 13 of the housing 1, so that the external connection terminal 5 abuts against the extended pole piece 31, forming a good mechanical connection structure and improving the stability of the electrical connection of the battery module box.

[0029] Specifically, as shown in FIGS. 2 and Figure 5 As shown in the figure, there are two extended pole pieces 31. The two extended pole pieces 31 are symmetrically arranged on the side wall of the inner cavity 11 close to the battery core pole column. A plurality of battery slots 111 are provided on the top and bottom end faces of the inner cavity 11. The cross - section of the battery slot 111 is an arc - shaped structure. The plurality of battery slots 111 are arranged in a linear array structure. A plurality of battery cores are sequentially embedded in the inner wall of the battery slot 111. A plurality of "gully" - shaped slots 32 are provided on both side edges of the extended pole piece 31. The extended pole piece 31 is mutually matched with the battery slot 111 through the slots 32.

[0030] The inner cavity 11 is provided with a plurality of battery slots 111 with an arc - shaped cross - section, which can be applicable to a battery module box with an electrical linear array structure. Sequentially embedding a plurality of battery cores in the inner wall of the battery slot 111 can reduce the investment in battery core brackets, and at the same time can stably fix the battery cores inside the battery module box. At the same time, a plurality of "gully" - shaped slots 32 are provided at the edges of the battery core pole columns, which can effectively avoid the situation that the extended pole piece 31 is displaced and misaligned inside the inner cavity 11.

[0031] The above - mentioned is only a preferred embodiment of the present invention, and it is not any form of limitation to the present invention. Although the present invention is disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above - disclosed technical content into equivalent embodiments of equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above - mentioned embodiments according to the technical means of the present invention all fall within the scope of the technical solution of the present invention.

Claims

1. A battery module box, comprising a shell and a plurality of cells inside the shell, wherein the interior of the shell is an inner cavity for placing the cells, a busbar is provided on the inner wall of the inner cavity close to the cell pole, and the busbar is used for electrical connection of the plurality of cells, and the front end of the shell is a pole end for external power supply, characterized in that: The end of the busbar is provided with an extended pole piece protruding outward, and the pole end is provided with a plurality of extended grooves, and the extended grooves and the inner cavity are in a conductive structure, and the middle part of the extended pole piece passes through the extended groove and is adhered and fixed to the surface of the pole end.

2. The battery module box according to claim 1, characterized in that: The surface of the pole end is provided with a connection hole for connecting an external terminal, the end of the extended pole piece is provided with a plug-in hole matching the connection hole, the middle part of the extended pole piece is bent toward the surface of the pole end to form an "L" shape, and the connection hole and the plug-in hole overlap.

3. The battery module box according to claim 2, characterized in that: The inner wall of the connection hole is provided with an internal thread structure for connecting an external terminal.

4. The battery module box according to claim 3, characterized in that: There are two extended pole pieces, which are symmetrically arranged on the side walls of the inner cavity close to the battery cell poles.

5. The battery module box according to claim 1, characterized in that: The top and bottom surfaces of the inner cavity are both provided with a plurality of battery slots, the cross-section of the battery slots is an arc-shaped structure, the plurality of battery slots are distributed in a linear array structure, and a plurality of battery cells are sequentially embedded in the inner wall of the battery slots.

6. The battery module box according to claim 5, characterized in that: The edges of both sides of the extended pole piece are provided with a plurality of "gully"-shaped slots, and the extended pole piece cooperates with the battery slot through the slots.

7. The battery module box according to any one of claims 1 to 6, characterized in that: One end surface of the shell is a detachable cover body, one end of the cover body is provided with a long buckle groove, and one end of the shell is provided with a buckle convex rib matching the buckle groove, and the buckle convex rib is buckled and connected with the buckle groove.

8. The battery module box according to claim 7, characterized in that: The cover body is provided with a plurality of avoidance holes at one end away from the buckle groove, and a matching fixing threaded hole is provided at one end of the shell body close to the avoidance hole. The cover body is threadedly fixed to the fixing threaded hole by fixing bolts passing through the avoidance holes.

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