CN219659108U - Busbar and battery module - Google Patents
Busbar and battery module Download PDFInfo
- Publication number
- CN219659108U CN219659108U CN202320866399.6U CN202320866399U CN219659108U CN 219659108 U CN219659108 U CN 219659108U CN 202320866399 U CN202320866399 U CN 202320866399U CN 219659108 U CN219659108 U CN 219659108U
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- busbar
- cells
- tooth
- connecting portion
- racks
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- 238000009413 insulation Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the utility model provides a bus bar and a battery module, and relates to the technical field of batteries, wherein the bus bar comprises a first connecting part for connecting a battery cell; one end of the second connecting part is connected to the first connecting part, the other end of the second connecting part extends away from the first connecting part, and the second connecting part is provided with a tooth pattern structure; the insection structure is used for being meshed with the insection structure of the second connecting part of the other bus bar; the battery cores on the modules are connected through a bus; between the homonymy utmost point post of adjacent electric core, can be through partial rack and tooth's socket intermeshing connection on the busbar second connecting portion, also can take off through rack and tooth's socket initiative between the second connecting portion and inlay the separation, not only be convenient for install and dismantle the maintenance, improve work efficiency, can also avoid leading to whole module or battery package scrapped problem because of utmost point post and busbar welding mistake, very big reduction economic loss.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a busbar and a battery module.
Background
The current most of modules and battery cells in a battery pack are connected with a busbar by means of laser welding, and although the connection in the mode has clear advantages and high welding strength, the connection has a plurality of defects. The greatest disadvantage is that once the cell and the busbar are welded together, the cell is difficult to disassemble. Because the battery cells are connected in series or in parallel through the bus bars to form a whole, if a certain battery cell has a welding problem in the production process, the whole module or battery pack needs to be scrapped.
Disclosure of Invention
The utility model aims to provide a bus bar and a battery module, for example, and solves the problem that an integral module or a battery pack is scrapped due to welding problems between a battery cell pole and the bus bar.
Embodiments of the utility model may be implemented as follows:
embodiments of the present utility model provide a bus bar comprising
The first connecting part is used for connecting the battery core; and
one end of the second connecting part is connected to the first connecting part, the other end of the second connecting part extends away from the first connecting part, and the second connecting part is provided with a tooth pattern structure;
the insection structure is used for being meshed with the insection structure of the second connecting part of the other busbar.
In some embodiments, the insection structure includes a plurality of racks arranged at intervals, and a tooth slot is formed between adjacent racks.
In some embodiments, the racks are diagonal racks inclined toward one side of the first connection portion, and tooth grooves between adjacent diagonal racks are diagonal tooth grooves.
In some embodiments, the spline comprises a first spline side surface adjacent to the first connection portion and a second spline side surface remote from the first connection portion, a spline end surface being connected between the first spline side surface and the second spline side surface;
the included angle between the first tooth groove side face and the tooth groove end face is larger than 90 degrees, and the included angle between the second tooth groove side face and the tooth groove end face is smaller than 90 degrees.
In some embodiments, the thickness of the first connecting portion is greater than the thickness of the second connecting portion, and along the thickness direction thereof, the first connecting portion includes a first connecting surface and a second connecting surface on both sides, and the second connecting portion includes a third connecting surface and a fourth connecting surface on both sides;
the first connecting surface and the third connecting surface are coplanar, and the insection structure is formed on the fourth connecting surface.
In some embodiments, the first connection face and/or the second connection face is provided with a recess for receiving a battery terminal.
The battery module comprises at least two battery cells arranged in an array, wherein the bus bar according to any one of the above is arranged on a pole of each battery cell, and the battery cells are connected through the bus bars.
In some embodiments, poles on the same side of adjacent electric cores are opposite in polarity, each electric core pole is separately connected with one busbar, and a plurality of electric cores are connected in series through the busbars.
In some embodiments, between the same-side poles of adjacent electric cores, one electric core pole is in fit connection with the first connecting surface, the rack and the tooth groove are arranged towards the electric core side, the other electric core pole is in fit connection with the second connecting surface, and the rack and the tooth groove are arranged towards the side far away from the electric core and are in meshed connection with the rack and the tooth groove arranged towards the electric core side.
In some embodiments, the electric cores are arranged in an array along a direction perpendicular to the largest side surface of the electric core, and an elastic heat insulation part is arranged between the adjacent electric cores, and the elastic heat insulation part rebounds towards the electric cores at two sides and applies acting force, so that racks and tooth grooves of the bus bars connected to the electric cores at two sides are tightly meshed.
The beneficial effects are that:
the busbar comprises a first connecting part and a second connecting part, wherein the first connecting part is connected with the battery core pole, the second connecting part is provided with a plurality of protruding racks at intervals, and tooth grooves are arranged between adjacent racks; between the homonymy utmost point post of adjacent electric core, can be through partial rack and tooth's socket intermeshing connection on the busbar second connecting portion, also can take off through rack and tooth's socket initiative between the second connecting portion and inlay the separation, not only be convenient for install and dismantle the maintenance, improved work efficiency, can also avoid leading to whole module or battery package scrapped problem because of utmost point post and busbar welding mistake, very big reduction economic loss.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a module structure in an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a stacked connection of the battery cells according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a bus structure according to an embodiment of the utility model;
FIG. 4 is a schematic diagram of bus connection according to an embodiment of the present utility model;
FIG. 5 is an enlarged schematic view of a second connecting portion of a bus bar according to an embodiment of the utility model;
fig. 6 is an enlarged partial schematic view of the post end of the module in an embodiment of the utility model.
Icon: 1-an electric core; 2-side plates; 3-end plates; 4-an output electrode; 5-bus bars; 501-a first connection; 5011—a first connection face; 5012-a second connection face; 502-a second connection; 5021-second spline sides; 5022-first spline sides; 5023-tooth slot end faces; 6-pole; 7-elastic insulation.
Detailed Description
In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
The inventor of the present utility model found that once the battery cells 1 and the bus bars 5 in the existing module and the battery pack are welded, the battery cells 1 are difficult to disassemble, and the battery cells 1 are connected in series or in parallel to form a whole through the bus bars 5, so that when a welding problem occurs in one battery cell 1, the whole module or the battery pack needs to be scrapped. The embodiment of the utility model provides a busbar and a battery module, which are at least used for solving the technical problem.
As shown in fig. 3, the bus bar 5 provided in the embodiment of the present utility model includes a first connection portion 501 and a second connection portion 502, where the first connection portion 501 is connected to the post 6 of the battery cell 1, and see fig. 1, 2 and 6.
As shown in fig. 5, the second connection portion 502 is provided with a plurality of protruding racks at intervals, tooth grooves are formed between adjacent racks, and the same side poles 6 of adjacent cells 1 are engaged with each other through partial racks and tooth grooves on the second connection portion 502 of the busbar 5, and meanwhile, see fig. 4.
It should be noted that polarities of the electrode posts 6 on the same side of the adjacent battery cells 1 are opposite, the positive electrode post and the negative electrode post of each battery cell 1 are respectively connected with one busbar 5, and the battery cells 1 are connected in series through the busbars 5; taking three cells 1 as an example, the positive electrode column of the middle cell 1 is connected with the bus bar 5 on the negative electrode column of the left cell 1 through the bus bar 5, and the negative electrode column of the middle cell 1 is connected with the bus bar 5 of the positive electrode column of the right cell 1 through the bus bar 5; it can be understood that the positive pole of the middle cell 1 is connected with the busbar 5 on the negative pole of the right cell 1 through the busbar 5, at this time, the negative pole of the middle cell 1 is connected with the busbar 5 of the positive pole of the left cell 1 through the busbar 5, and the busbars 5 are mutually engaged and connected through racks and tooth grooves.
It should be noted that the first connecting portion 501 includes a first connecting surface 5011 and a second connecting surface 5012 disposed on opposite sides, wherein a rack on the second connecting portion 502 is disposed to protrude toward the first connecting surface 5011 of the first connecting portion 501; between the same-side polar posts 6 of adjacent electric cores 1, one electric core 1 polar post 6 is connected with the first connecting surface 5011 in a fitting way, a rack and a tooth groove are arranged towards the electric core 1 side, the other electric core 1 polar post 6 is connected with the second connecting surface 5012 in a fitting way, and the rack and the tooth groove are arranged towards one side far away from the electric core 1 and are connected with the rack and the tooth groove arranged towards the electric core 1 side in a meshing way.
In the process of connecting the bus bars 5 between the poles 6 on the same side of the adjacent battery cells 1, each pole 6 is connected with one bus bar 5 independently, one pole 6 is welded with the first connecting surface 5011 of the first connecting part 501 of the bus bar 5, the other pole 6 is welded with the second connecting surface 5012 of the first connecting part 501 of the bus bar 5, and in the process, the second connecting parts 502 of the two bus bars 5 are oppositely arranged and the respective racks and tooth grooves are also oppositely arranged up and down; the second connection parts 502 of the busbar 5 are made to approach each other by external pushing force or extrusion force until the respective racks are in contact with each other, at this time, the racks between the two second connection parts 502 are extruded each other, the second connection part 502 on the opposite upper side is slightly warped upward, and the second connection part 502 on the opposite lower side is slightly warped downward until the racks and the tooth grooves of the two second connection parts 502 are engaged with each other; since the thickness of the second connection portion 502 is thinner than that of the first connection portion 501, and at the beginning of the design of the bus bar 5, the buckling amplitude of the second connection portion 502 is ensured to be within the range of elastic deformation that can be borne by the bus bar 5.
In an alternative embodiment, if the distance between the adjacent cells 1 is small, the racks and the tooth grooves on the second connection portions 502 of the two buses 5 can be directly engaged with each other without applying external pushing force or pressing force; if the distance between the adjacent electric cores 1 is larger and the elastic heat insulation pieces 7 are further arranged, the electric cores 1 are far away from each other under the action of the expansion force of the elastic heat insulation pieces 7, external pushing force or extrusion force is applied at the moment, and racks and tooth grooves on the two second connecting parts 502 are meshed and are stretched and locked in opposite directions.
In an alternative embodiment, the racks and the tooth slots on two adjacent second connection portions 502 may be fully engaged to achieve tightness and strength of connection between the bus bars 5; similarly, the racks and the tooth grooves on the two adjacent second connection portions 502 may not be completely meshed, that is, only the racks and the tooth grooves on the opposite front ends of the two second connection portions 502 are meshed, and a certain margin is left, so that the connection between the bus bars 5 is not affected by the welding error of the bus bars 5 or the manufacturing error of the size of the bus bars 5 in the stacking process of the battery cells 1.
In an alternative embodiment, the top surface of the terminal 6 of the battery core 1 is attached to the first connecting surface 5011 or the second connecting surface 5012, the orthographic projection area of the first connecting surface 5011 or the second connecting surface 5012 towards the top surface of the terminal 6 of the battery core 1 is larger than the area of the top surface of the terminal 6 of the battery core 1, that is, the area of the first connecting surface 5011 and the area of the second connecting surface 5012 of the first connecting portion 501 are larger than the area of the connecting surface of the terminal 6, and the connecting surface of the terminal 6 is preferably attached to the middle of the first connecting surface 5011 or the second connecting surface 5012, so that welding is facilitated.
In an alternative embodiment, the first connection surface 5011 and the second connection surface 5012 are both provided with grooves (not shown in the figure) for accommodating the poles 6 of the battery core 1, that is, grooves for accommodating the poles 6 are formed in the middle parts of the first connection surface 5011 and the second connection surface 5012, the depth of the grooves is smaller than that of the poles 6, so that the connection and positioning of the bus bars 5 and the poles 6 are facilitated, and the welding between the poles 6 and the bus bars 5 is facilitated.
It should be noted that, the racks are oblique racks inclined toward one side of the first connection portion 501, and tooth grooves between adjacent oblique racks are oblique tooth grooves; taking the pole 6 on the same side of the adjacent electric core 1 as an example, the electric cores 1 are mutually far away under the action of the expansion force of the elastic heat insulation piece 7, and the racks on the two second connecting portions 502 are meshed with tooth grooves and are stretched and locked in opposite directions, because the racks are oblique racks inclined towards one side of the first connecting portion 501, the tooth grooves are oblique tooth grooves inclined towards one side of the first connecting portion 501, and at the moment, the bus 5 is more tightly meshed with the oblique racks and the oblique tooth grooves when retreating under the action of the expansion force.
In an alternative embodiment, the tooth groove includes a first tooth groove side 5022 close to the first connection portion 501 and a second tooth groove side 5021 far away from the first connection portion 501, a tooth groove end face 5023 is connected between the first tooth groove side 5022 and the second tooth groove side 5021, an included angle between the first tooth groove side 5022 and the tooth groove end face 5023 is greater than 90 °, that is, an obtuse angle structure, and an included angle between the second tooth groove side 5021 and the tooth groove end face 5023 is less than 90 °, that is, an acute angle structure.
It should be noted that, in order to ensure the structural strength and the flow conductivity of the busbar 5, the first connecting portion 501 and the second connecting portion 502 of the busbar 5 are integrally connected and formed, the busbar 5 is in a two-stage step shape, the first connecting portion 501 is higher than the second connecting portion 502, and the two second connecting portions 502 are flush with the first connecting portion 501 after being engaged and connected, so that the uniformity and consistency of the installation of the busbar 5 are ensured, and the efficient use of space is realized.
It should be noted that, the battery module of the utility model comprises at least two stacked battery cells 1, the electrode posts 6 of the adjacent battery cells 1 are provided with the bus bars 5, the battery cells 1 are stacked along the direction vertical to the largest side surface of the battery cell 1, and an elastic heat insulation piece 7 is connected between the adjacent battery cells 1; the module further comprises two oppositely arranged side plates 2 and two oppositely arranged end plates 3, and an output pole 4.
In the assembly process of the module or the battery pack, the battery cells 1 are stacked along the direction vertical to the largest side face of the battery cells 1, the elastic heat insulation pieces 7 are bonded or welded between the adjacent battery cells 1, the side plates 2 and the end plates 3 are sequentially connected and form a module or battery pack frame surrounding the stacked battery cells 1, the bus bars 5 are welded between the pole columns 6 on the same side of the adjacent battery cells 1, and the bus bars 5 are connected through the meshing of racks and tooth grooves.
In summary, the embodiment of the utility model provides a busbar and a battery module, where the busbar 5 includes a first connection portion 501 and a second connection portion 502, the first connection portion 501 is connected with a pole 6 of the battery core 1, the second connection portion 502 is provided with a plurality of protruding racks at intervals, and tooth slots are provided between adjacent racks; the battery cells 1 on the module are connected through a bus bar 5; between the homonymy utmost point post 6 of adjacent electric core 1, can be through partial rack and tooth's socket intermeshing connection on busbar 5 second connecting portion 502, also can take off through rack and tooth's socket initiative between the second connecting portion 502 and inlay the separation, not only be convenient for install and dismantle the maintenance, improved work efficiency, can also avoid leading to whole module or battery package scrapped problem because of utmost point post 6 and busbar 5 welding mistake, very big reduction economic loss.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (10)
1. A busbar (5), characterized by comprising
A first connection part (501) for connecting the battery cell (1); and
a second connecting portion (502) having one end connected to the first connecting portion (501) and the other end extending in a direction away from the first connecting portion (501), the second connecting portion (502) being formed with a corrugated structure;
the insection structure is used for being meshed with the insection structure of the second connecting part (502) of the other busbar.
2. The busbar of claim 1, wherein the tooth structure comprises a plurality of spaced apart racks, and tooth slots are formed between adjacent racks.
3. The busbar of claim 2, wherein the racks are diagonal racks inclined toward the first connecting portion (501), and the tooth grooves between the adjacent diagonal racks are diagonal tooth grooves.
4. The busbar of claim 2 wherein the spline includes a first spline side (5022) proximate the first connection (501) and a second spline side (5021) distal from the first connection (501), the first spline side (5022) and the second spline side (5021) having a spline end face (5023) connected therebetween;
the included angle between the first tooth groove side surface (5022) and the tooth groove end surface (5023) is larger than 90 degrees, and the included angle between the second tooth groove side surface (5021) and the tooth groove end surface (5023) is smaller than 90 degrees.
5. The busbar of claim 1, wherein the first connecting portion (501) has a thickness greater than that of the second connecting portion (502), the first connecting portion (501) including a first connecting surface (5011) and a second connecting surface (5012) on both sides in a thickness direction thereof, the second connecting portion (502) including a third connecting surface and a fourth connecting surface on both sides;
the first connecting surface (5011) and the third connecting surface are coplanar, and the insection structure is formed on the fourth connecting surface.
6. The busbar according to claim 5, characterized in that the first connection face (5011) and/or the second connection face (5012) are provided with grooves for receiving poles (6) of the battery cells (1).
7. A battery module, characterized by comprising at least two cells (1) arranged in an array, wherein a busbar (5) according to any one of claims 1-6 is arranged on a pole (6) of the cells (1), and the cells (1) are connected through the busbar (5).
8. The battery module according to claim 7, wherein the poles (6) on the same side of adjacent cells (1) are opposite in polarity, the poles (6) of each cell (1) are individually connected to one bus bar (5), and a plurality of cells (1) are connected in series through the bus bars (5).
9. The battery module according to claim 8, wherein between the same-side poles (6) of adjacent cells (1), one of the cells (1) poles (6) is connected with the first connection face (5011) in a fitting manner, the rack and the tooth groove are provided toward the cell (1) side, the other cell (1) pole (6) is connected with the second connection face (5012) in a fitting manner, and the rack and the tooth groove are provided toward the side away from the cell (1) and are connected with the rack and the tooth groove provided toward the cell (1) side in a meshing manner.
10. The battery module according to claim 7, wherein the cells (1) are arranged in an array along a direction perpendicular to the largest side surface of the cells (1), elastic heat insulation members (7) are arranged between adjacent cells (1), the elastic heat insulation members (7) rebound towards the cells (1) at two sides and apply an acting force, so that racks and tooth grooves of the busbar (5) connected to the cells (1) at two sides are tightly meshed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320866399.6U CN219659108U (en) | 2023-04-18 | 2023-04-18 | Busbar and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320866399.6U CN219659108U (en) | 2023-04-18 | 2023-04-18 | Busbar and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659108U true CN219659108U (en) | 2023-09-08 |
Family
ID=87880378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320866399.6U Active CN219659108U (en) | 2023-04-18 | 2023-04-18 | Busbar and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659108U (en) |
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2023
- 2023-04-18 CN CN202320866399.6U patent/CN219659108U/en active Active
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