CN217427023U

CN217427023U - Converge subassembly and electric core module

Info

Publication number: CN217427023U
Application number: CN202221163452.8U
Authority: CN
Inventors: 林晖; 王昕�
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-09-13
Anticipated expiration: 2032-05-12

Abstract

The application relates to the technical field of batteries, especially, relate to a subassembly and electric core module converge, the subassembly that converges includes: a first sub-bus comprising: the first confluence part and the second confluence part are connected with each other, and the first confluence part and the second confluence part are arranged at an angle; the second sub bus bar comprises a third bus part and a fourth bus part which are connected with each other, and the third bus part and the fourth bus part are arranged at an angle; the first confluence part is connected with the pole of one cell, the second confluence part is used for being connected with the third confluence part, and the fourth confluence part is connected with the pole of the other cell; the pole of each battery cell is arranged on the large surface of the battery cell. The application provides a subassembly that converges's first sub busbar and second sub busbar all have bending structure to make interconnect's first sub busbar and second sub busbar can be connected with the utmost point post on the big face of two electric cores respectively, thereby compensate current traditional busbar and can't carry out the technological vacancy that concatenates to the electric core of utmost point post setting on the big face.

Description

Converge subassembly and electric core module

Technical Field

The application relates to the technical field of batteries, especially, relate to a subassembly and electric core module converge.

Background

At present, the pole of the battery cell module is mostly positioned on the small face of the battery cell in the opposite direction, and the battery cell in the form of a straight flat square block is adopted by the corresponding bus bar, so that the length of the battery cell is additionally increased by the battery cell in the form. Since the appearance of a novel battery cell with a large-area pole column, the conventional straight-plate bus bar does not meet the use requirement any more.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a subassembly and electric core module converge to solve the current busbar that exists to a certain extent and can't be applicable to the condition that utmost point post set up on electric core big face among the prior art, thereby can't carry out the technical problem who concatenates to a plurality of these kinds of electric cores.

The application provides a subassembly that converges includes: a first sub-bus comprising: the first confluence part and the second confluence part are connected with each other, and the first confluence part and the second confluence part are arranged at an angle;

a second sub bus bar including a third bus portion and a fourth bus portion connected to each other, the third bus portion being disposed at an angle to the fourth bus portion;

the first confluence part is connected with a pole of one battery cell, the second confluence part is used for being connected with the third confluence part, and the fourth confluence part is connected with a pole of another battery cell;

and the pole of each battery cell is arranged on the large surface of the battery cell.

In the above technical solution, further, the first, second, third and fourth bus portions all have a flat plate structure, one end of the first bus portion is connected to a pole of the battery cell, and the other end of the first bus portion is connected to the second bus portion;

a first lap joint part is arranged at one end, far away from the first confluence part, of the second confluence part;

a second overlapping part is arranged at one end, far away from the fourth confluence part, of the third confluence part, and the shape of the first overlapping part is matched with that of the second overlapping part;

one end of the fourth confluence portion is connected with the third confluence portion, and the other end of the fourth confluence portion is connected with the pole of the other battery cell.

In any one of the above technical solutions, further, the first bus bar portion is disposed perpendicular to the second bus bar portion; the third confluence portion is perpendicular to the fourth confluence portion.

In any one of the above technical solutions, further, the battery cell has a rectangular parallelepiped structure, and includes a first surface and a second surface having a first area, a first side wall surface and a second side wall surface having a second area, and a first end surface and a second end surface having a third area, where the first area is larger than the second area, and the second area is larger than the third area; the large surface of the cell is one of the first surface and the second surface.

In any of the above claims, further, the first strap and the second strap have a same first predetermined thickness, portions of the second bus bar other than the first strap and portions of the third bus bar other than the second strap have a same second predetermined thickness, the second predetermined thickness being greater than the first predetermined thickness;

the first and fourth bus bars have a same third predetermined thickness, the second predetermined thickness being greater than the third predetermined thickness.

In any of the above technical solutions, further, the first predetermined thickness is the same as the third predetermined thickness; the second predetermined thickness is 2 times the first predetermined thickness and is also 2 times the third predetermined thickness.

In any one of the above technical solutions, further, a first limit surface is formed between the first overlapping portion and the second confluence portion, a second limit surface is formed between the second overlapping portion and the third confluence portion, a first gap is formed between the second overlapping portion and the first limit surface, and a second gap is formed between the first overlapping portion and the second limit surface.

In any of the above technical solutions, further, neither the first gap nor the second gap is greater than 3 mm.

In any one of the foregoing technical solutions, further, a top cover is disposed on the pole of each of the battery cells, the first bus portion is integrated with the top cover of one of the battery cells, and the fourth bus portion is integrated with the top cover of another one of the battery cells.

The application still provides a battery cell module, include above-mentioned arbitrary technical scheme the subassembly that converges, therefore, have this subassembly that converges's all beneficial technological effects, here, no longer give consideration to repeatedly.

Compared with the prior art, the beneficial effect of this application is:

the application provides a converge subassembly includes: a first sub-bus comprising: the first confluence part and the second confluence part are connected with each other, and the first confluence part and the second confluence part are arranged at an angle; the second sub bus bar comprises a third bus part and a fourth bus part which are connected with each other, and the third bus part and the fourth bus part are arranged at an angle; the first confluence part is connected with a pole of one battery cell, the second confluence part is used for being connected with the third confluence part, and the fourth confluence part is connected with a pole of another battery cell; the pole of each battery cell is arranged on the large surface of the battery cell.

The application provides a subassembly that converges's first sub busbar and second sub busbar all have bending structure to make interconnect's first sub busbar and second sub busbar can be connected with the utmost point post on the big face of two electric cores respectively, thereby compensate current traditional busbar and can't carry out the technological vacancy that concatenates to the electric core of utmost point post setting on the big face.

The application provides an electric core module, including the aforesaid the subassembly that converges, therefore, can not be connected the utmost point post of electric core under the circumstances of coplanar to the utmost point post of a plurality of electric cores through this subassembly that converges to constitute electric core module, so that electric core module can normal use.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a bus bar assembly according to an embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

fig. 3 is a schematic diagram of connection between a bus bar assembly and a battery cell provided in an embodiment of the present application.

Reference numerals are as follows:

1-first sub-busbar, 101-first busbar, 102-second busbar, 1021-first bridging part, 2-second sub-busbar, 201-third busbar, 2011-second bridging part, 202-fourth busbar, 3-cell, 301-pole, d 1-first predetermined thickness, d 2-second predetermined thickness, d 3-third predetermined thickness, a-first gap, b-second gap.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The bus bar assembly and the cell module according to the embodiment of the present application are described below with reference to fig. 1 to 3.

Referring to fig. 1 to 3, an embodiment of the present application provides a bus bar assembly, where two adjacent electric cores are connected and conducted through the bus bar assembly, and the bus bar assembly includes: the battery cell structure comprises a first sub-busbar 1 and a second sub-busbar 2, wherein the first sub-busbar 1 is connected with a positive pole (or a negative pole) of one of two adjacent battery cells 3, the second sub-busbar 2 is connected with a negative pole (or a positive pole) of the other of the two adjacent battery cells 3, preferably, the first sub-busbar 1 and the second sub-busbar 2 are both aluminum bars, and after the first sub-busbar 1 is connected with the second sub-busbar 2, the two adjacent battery cells 3 can be connected and conducted.

Further, the first sub bus bar 1 includes a first bus portion 101 and a second bus portion 102, preferably, the first bus portion 101 and the second bus portion 102 each have a flat plate structure in a rectangular parallelepiped shape, the first bus portion 101 is connected to the positive post (or the negative post) of one of the battery cells 3, the connection may be, but not limited to, attaching and welding the first bus portion 101 to the positive post (or the negative post) of the battery cell 3, the other end of the first bus portion 101 is connected to one end of the second bus portion 102, preferably, the first bus portion 101 is disposed at an angle to the second bus portion 102, so that the first bus portion 101 and the second bus portion 102 extend in different directions, more preferably, the first bus portion 101 is disposed perpendicular to the second bus portion 102, and the first bus portion 101 and the second bus portion 102 have an integrated structure.

Further, the second sub-bus bar 2 includes a third bus bar portion 201 and a fourth bus bar portion 202, preferably, the third bus bar portion 201 and the fourth bus bar portion 202 also have a rectangular parallelepiped flat plate structure, one end of the third bus bar portion 201 is used for connecting with the second bus bar portion 102, the other end of the third bus bar portion 201 is connected with the fourth bus bar portion 202, and one end of the fourth bus bar portion 202 far from the third bus bar portion 201 is connected with the negative pole column (or positive pole column) of another cell 3, but the connection manner may not be limited to that two portions are attached and welded, preferably, the third bus bar portion 201 and the fourth bus bar portion 202 are arranged perpendicular to each other and have an integrated structure.

Further, one end of the second bus bar 102, which is far away from the first bus bar 101, forms a first overlapping part 1021 on the upper surface (or the lower surface) of the flat plate structure of the second bus bar 102, the thickness of the first overlapping part 1021 is smaller than that of the part, except for the first overlapping part 1021, of the second bus bar 102, the lower surface (or the upper surface), which is far away from the fourth bus bar 202, of the third bus bar 201 forms a second overlapping part 2011, and the thickness of the second overlapping part 2011 is smaller than that of the part, except for the second overlapping part 2011, of the third bus bar 201, so that the first overlapping part 2011 (or the second overlapping part 2011) can be located above the second overlapping part 2011 (or the first overlapping part 1021), thereby realizing the overlapping of the second bus bar 102 and the third bus bar 201 in a staggered manner.

Further, in the state shown in fig. 1, the first bus bar 101 and the fourth bus bar 202 each extend in the vertical direction, the second bus bar 102 extends toward the fourth bus bar 202, the third bus bar 201 extends toward the first bus bar 101, and the first bus bar 101 and the fourth bus bar 202 have the same length, so that the second bus bar 102 and the third bus bar 201 can be brought close to each other until the first bridging portion 1021 and the second bridging portion 2011 can be bridged to each other to connect them, and preferably, the first bridging portion 1021 and the second bridging portion 2011 are connected by welding.

Further, a first limit surface is formed between the first lapping part 1021 and the second confluence part 102, a second limit surface is formed between the second lapping part 2011 and the third confluence part 201, a first gap a is formed between an end surface of the second lapping part 2011, which is relatively far away from the third confluence part 201, and the first limit surface, and a second gap b is formed between an end surface of the first lapping part 1021, which is relatively far away from the second confluence part 102, and the second limit surface, so that gaps are formed on two sides of a butt joint or lapping position between the second confluence part 102 and the third confluence part 201, respectively, and therefore, stress caused by thickness difference of the battery cell 3 in the charging and discharging process can be effectively prevented, and influence caused by size interference in the assembling process can also be avoided.

Preferably, the width of the first gap a and the second gap b is less than or equal to 3 mm.

Further, the battery cell 3 in the embodiment of the present application has a rectangular parallelepiped structure, and includes two surfaces with the largest area, which are commonly referred to as the large surface of the battery cell 3 in the industry, two side wall surfaces with the middle area and two end surfaces with the smallest area, the terminal posts 301 of the battery cells 3 are all disposed on the large surface of the battery cell 3 at positions close to the end portions, two adjacent battery cells 3 are stacked in the direction from top to bottom (or from bottom to top) or in the direction from left to right (or from right to left), the positive pole and the negative pole of one of the battery cells 3 are respectively arranged at the positions close to the two ends of the same large surface of the battery cell 3, the other battery cell 3 is similar, and the positive post of one of them electricity core 3 just sets up to the negative pole post of another electricity core 3, and when the quantity of electricity core 3 was more than two, a plurality of electricity cores 3 also piled up in order to obtain 3 modules of electricity core according to this law.

It should be noted that, the pole columns 301 of any two adjacent electric cores 3 in the plurality of electric cores 3 are arranged in parallel along the arrangement direction of the plurality of electric cores 3, as shown in fig. 3, the pole columns 301 of two adjacent electric cores 3 are not located on the same plane, and therefore, the conventional sheet-shaped bus bar cannot connect and conduct the two pole columns 301 under such a condition.

Further, the first bridging portion 1021 has the same thickness as that of the second bridging portion 2011, both thicknesses are the first predetermined thickness d1, the thickness of the first bridging portion 1021 and the thickness of the second bridging portion 2011 can be the same as those of the existing conventional bus bar, the thickness of the part of the second bus portion 102 except the first bridging portion 1021 is the same as that of the part of the third bus portion 201 except the second bridging portion 2011, and is the second predetermined thickness d2, the second predetermined thickness d2 is greater than the first predetermined thickness d1, preferably, the second predetermined thickness d2 is 2 times of the first predetermined thickness d1, so that after the first bridging portion 1021 and the second bridging portion 2011 are overlapped with each other, the outer surface of the first bridging portion 1021 and the outer surface of the second bridging portion 2011 can be kept flush with the second bus portion 102 and the third bus portion 201, and the subsequent overlapping of the nickel plate provides an effective space for FPC. The first bus bar part 101 and the fourth bus bar part 202 have a third predetermined thickness d3, preferably, the third predetermined thickness d3 is the same as the first predetermined thickness d1, and the bent design can realize the front-back overlapping of the poles 301 of the side-by-side cells 3 and can also meet the required flow area.

It should be noted that, the embodiment of the present application provides a bus bar assembly having at least two assembling forms. First, after welding the first bus bar 101 and the fourth bus bar 202 to the electrode posts 301 of the two battery cells 3, respectively, the first overlapping part 1021 and the second overlapping part 2011 are welded; secondly, utmost point post 301 of electric core 3 is provided with the top cap, can integrate first sub busbar 1 and second sub busbar 2 respectively on a plurality of electric core 3's top cap when the top cap is integrated, the part of at least and first sub busbar 1 and second sub busbar 2 and utmost point post 301 contact of top cap has electric conductivity to make first sub busbar 1 and second sub busbar 2 switch on with electric core 3's utmost point post 301, then can be connected two electric core 3 and switch on after being connected first sub busbar 1 and second sub busbar 2.

To sum up, the first sub-busbar and the second sub-busbar of the current collection assembly provided by the application all have a bending structure, so that the first sub-busbar and the second sub-busbar which are connected with each other can be connected with the polar columns on the large faces of the two electric cores respectively, and the technical vacancy that the existing traditional busbar cannot serially connect the electric cores of the polar columns on the large faces is made up.

The embodiment of this application still provides a battery cell module, includes the subassembly that converges of any above-mentioned embodiment, therefore, has the whole beneficial technological effect of this subassembly that converges, here, no longer gives unnecessary details.

What need explain is that electric core module includes a plurality of electric cores, and a plurality of electric cores are piled up according to the law, and it is connected through a subassembly electricity that converges between two adjacent electric cores to concatenate a plurality of monomer electric cores and form the module.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bus bar assembly, comprising:

a first sub-bus comprising: the first confluence part and the second confluence part are connected with each other, and the first confluence part and the second confluence part are arranged at an angle;

2. The busbar assembly according to claim 1, wherein the first, second, third and fourth busbars each have a flat plate structure, one end of the first busbar is connected to a pole of the battery cell, and the other end of the first busbar is connected to the second busbar;

3. The manifold assembly of claim 1, wherein the first manifold portion is disposed perpendicular to the second manifold portion; the third confluence portion is perpendicular to the fourth confluence portion.

4. The bus bar assembly of claim 1, wherein the cell has a rectangular parallelepiped structure comprising first and second surfaces having a first area, first and second sidewall surfaces having a second area, first and second end surfaces having a third area, the first area being greater than the second area, the second area being greater than the third area; the large surface of the cell is one of the first surface and the second surface.

5. The bus bar assembly of claim 2, wherein the first strap and the second strap have a same first predetermined thickness, portions of the second bus bar other than the first strap and portions of the third bus bar other than the second strap have a same second predetermined thickness, the second predetermined thickness being greater than the first predetermined thickness;

6. The bus bar assembly of claim 5, wherein the first predetermined thickness is the same as the third predetermined thickness; the second predetermined thickness is 2 times the first predetermined thickness and is also 2 times the third predetermined thickness.

7. The bus bar assembly according to claim 2, wherein a first position limiting surface is formed between the first overlapping portion and the second bus portion, a second position limiting surface is formed between the second overlapping portion and the third bus portion, a first gap is formed between the second overlapping portion and the first position limiting surface, and a second gap is formed between the first overlapping portion and the second position limiting surface.

8. The bus bar assembly of claim 7, wherein neither the first nor the second gap is greater than 3 mm.

9. The busbar assembly according to any of claims 1 to 8, wherein the poles of the cells are provided with top covers, the first busbar is integrated with the top cover of one of the cells, and the fourth busbar is integrated with the top cover of another of the cells.

10. A battery cell module, comprising a plurality of battery cells and the bus bar assembly of any one of claims 1 to 9, wherein two adjacent battery cells are connected by one of the bus bar assemblies.