A module structure for automated welding busbar

Abstract

The utility model provides a module structure for automatically welding a bus, including a battery module, the battery module including a plurality of single cells, the plurality of single cells being stacked horizontally to form the battery module, pole ears being provided at both ends of the plurality of single cells, a bus being provided at one side of the pole ears, a cross section of the bus being in a D shape, a bracket male head being provided at one side of the bus, and a bracket female head being provided at the side of the bus opposite to the bracket male head; in the utility model, the upper surface of the bus is no longer used for welding, but the side of the bus is used for welding, so as to provide a sufficient welding width; the bracket no longer adopts a traditional flat plate structure, but is designed as a spliced ​​plug-in structure, so as to realize plug-in of a convex block and a groove in the middle of the bus to fix the bus; through holes and notches are respectively provided on the bracket and the bus, so as to facilitate the automatic equipment to grab and fix the bus, so as to realize automatic welding.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion batteries, in particular to a module structure of an automatic welding busbar. Background Art

[0002] A battery box is a group of batteries consisting of several single cells, a box body, a battery management system and related mounting structural parts. It has a standard battery box structure, battery box monitoring equipment, battery box connectors, battery box environmental control equipment, etc. Existing battery boxes usually have an integrated cooling and heat dissipation structure, and the interior of the battery box is usually composed of multiple modules.

[0003] At present, most large modules composed of soft-pack batteries require manual operation to install the bracket and weld the busbar. In the actual production process, in addition to increasing labor costs and reducing production efficiency, there will also be uncontrollable manual operation errors, which will lead to problems such as inadequate bracket installation, poor welding and even safety hazards.

[0004] For large modules with thin cells, many strings and few parallels, especially large modules with multiple strings in a parallel, the gap between the cells in each string is small, resulting in a narrow bus width. It is difficult to weld the pole ears folded 90 degrees and overlapped on the upper surface of the bus. At the same time, traditional flat-plate brackets are difficult to fix busbars with too narrow widths. In addition, since the cells are thin, the gap between the pole ears is small, resulting in a small electrical safety gap.

[0005] To this end, we propose a module structure for automated busbar welding to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a module structure for automatic welding busbars.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A module structure for automatically welding a busbar comprises a battery module, wherein the battery module comprises a plurality of single cells, wherein the plurality of single cells are stacked horizontally to form a battery module, wherein both ends of the plurality of single cells are provided with pole ears, a busbar is provided on one side of the pole ears, a cross section of the busbar is in a D shape, a male bracket is provided on one side of the busbar, a female bracket is provided on the side of the busbar opposite to the male bracket, a protrusion is provided on the inner side of the male bracket, a groove is provided on the inner side of the female bracket, and the protrusion is snap-fitted to the groove.

[0009] Further preferably, a limiting block is provided on the protrusion, and the cross section of the limiting block is triangular.

[0010] Further preferably, each of the grooves is provided with a limiting groove, and the inner surface of the limiting groove is a rough surface.

[0011] Further preferably, the limiting block 9 and the limiting groove are fixed by snapping.

[0012] Further preferably, the protrusion and the groove are both located on the inner side of the bus after installation.

[0013] Further preferably, the protrusions and the grooves are symmetrically arranged, and the tabs are connected to the busbar by welding.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the upper surface of the busbar is no longer used for welding, but the side of the busbar is used for welding, which provides a sufficient welding width. The bracket no longer adopts the traditional flat plate structure, but is designed as a spliced ​​plug-in structure. The protrusions and grooves are plugged in the busbar to fix the busbar. Through holes and notches are respectively opened on the bracket and the busbar, which facilitates the automated equipment to grab and fix the busbar, thereby realizing automated welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the battery module structure provided by the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of a single cell;

[0018] Figure 3 is a schematic diagram of the busbar structure;

[0019] Figure 4 This is a schematic diagram of the male head structure of the bracket;

[0020] Figure 5 This is a schematic diagram of the bracket female head structure;

[0021] Figure 6 for Figure 4 A schematic diagram of the structure enlargement in the middle;

[0022] Figure 7 for Figure 5 Enlarged schematic diagram of the structure at point B in the middle.

[0023] In the figure: 1. battery module; 2. single cell; 3. busbar; 4. tab; 5. male connector of bracket; 6. female connector of bracket; 7. bump; 8. groove; 9. limit block; 10. limit groove. DETAILED DESCRIPTION

[0024] Reference Figure 1-7A module structure for automatically welding a busbar 2 includes a battery module 1, wherein the battery module 1 includes a plurality of single cells 2, wherein the plurality of single cells 2 are stacked horizontally to form the battery module 1, wherein the battery module 1 includes a box body and the single cells 2 arranged in the box body, wherein the specific number of the single cells 2 can be selected according to actual conditions, and the present embodiment does not limit the number of the single cells 2 in the battery module 1.

[0025] Both ends of multiple single battery cells 2 are provided with pole ears 4, and one side of the pole ears 4 is provided with a bus 2. The cross-section of the bus 2 is D-shaped. Multiple bus bars 2 are inserted into the middle of the bus 2 through the pre-opened D-shaped notches so that the two parts of the bracket male head 5 and the bracket female head 6 are aligned. One side of the bus 2 is provided with a bracket male head 5, and the side of the bus 2 opposite to the bracket male head 5 is provided with a bracket female head 6. The inner side of the bracket male head 5 is provided with a protrusion 7, and the inner side of the bracket female head 6 is provided with a groove 8. The protrusion 7 and the groove 8 are snap-connected, and the limit block 9 of the bracket male head 5 corresponds to the limit groove 10 of the bracket female head 6, so that the bracket male head 5 and the bracket female head 6 are snap-locked and interlocked in the middle of the bus 2, and the bus 2 is preliminarily fixed, so that the bus 2, the bracket male head 5 and the bracket female head 6 form an integrated part.

[0026] Then place the integrated part formed by the bus 2, the bracket male head 5 and the bracket female head 6 on the lead-out end of the pole ear 4 of the single battery cell 2. When placing it, pay attention to use the D-shaped guide of the bus 2 to insert it. After the position is accurately confirmed, the pole ear 4 of the single battery cell 2 is welded to the two sides of the bus 2. After welding is completed, the bracket male head 5, the bracket female head 6 and the bus 2 are hot-melt fixed. The grooves on the bus 2 and the holes on the bracket male head 5 and the bracket female head 6 are all to enable the automated equipment to accurately locate, grasp and place, so as to realize automated welding.

[0027] A limit block 9 is provided on the protrusion 7, and the cross section of the limit block 9 is triangular. The triangle has stability, so that the limit block 9 can be more stably fixed in the limit groove 10, which can effectively improve the stability of the bracket male head 5 and the bracket female head 6 after being fixed.

[0028] The limit block 99 and the limit groove 10 are fixed by snapping, which can be installed and fixed more conveniently. The groove 8 is provided with a limit groove 10, and the inner surface of the limit groove 10 is a rough surface. The rough surface of the limit groove 10 can increase the friction with the contact surface of the limit block 9, which can effectively improve the stability of the limit block 9 and the limit groove 10 after snapping.

[0029] After installation, the protrusion 7 and the groove 8 are both located on the inner side of the bus 2, which can save space and facilitate the installation of external output pole components. The protrusion 7 and the groove 8 are symmetrically arranged, the protrusion 7 and the groove 8 can be more conveniently aligned and installed, and can also facilitate the operation of external automatic welding tooling. The pole ears 4 are connected to the bus 2 by welding, specifically by laser welding, and laser welding is not prone to the phenomenon of cold welding and leaking welding.

Claims

1. A module structure for automated welding of busbars, comprising a battery module, wherein the battery module comprises a plurality of single cells, wherein the plurality of single cells are stacked horizontally to form a battery module, wherein both ends of the plurality of single cells are provided with tabs, wherein: A bus is provided on one side of the pole ear, and the cross-section of the bus is D-shaped. A male bracket is provided on one side of the bus, and a female bracket is provided on the side of the bus opposite to the male bracket. A protrusion is provided on the inner side of the male bracket, and a groove is provided on the inner side of the female bracket, and the protrusion is clamped with the groove.

2. The module structure of the automated welding busbar according to claim 1, characterized in that: A limiting block is arranged on the protrusion, and the cross section of the limiting block is triangular.

3. The module structure of the automated welding busbar according to claim 2, characterized in that: The grooves are all provided with limiting grooves, and the inner surfaces of the limiting grooves are rough surfaces.

4. The module structure of the automated welding busbar according to claim 3, characterized in that: The limiting block and the limiting groove are fixed by means of a snap connection.

5. The module structure of the automated welding busbar according to claim 1, characterized in that: The protrusion and the groove are both located inside the busbar after installation.

6. The module structure of the automated welding busbar according to claim 1, characterized in that: The protrusions and the grooves are symmetrically arranged, and the tabs are connected to the busbars by welding.

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