Cylindrical battery cell same-side series connection structure

Abstract

The utility model discloses a cylindrical battery cell same-side series connection structure which comprises a first support, a second support and a confluence piece located above the first support, a cavity structure is defined by the first support and the second support, a plurality of cylindrical battery cells are located in the cavity structure, and battery cell anodes of all the cylindrical battery cells are located on the same side. The confluence sheets are connected with the battery cell anodes and the battery cell cathodes of the adjacent cylindrical battery cells; the first bracket and the second bracket are fixed through a buckle structure, and the adjacent cylindrical battery cells are connected in series by the convergence sheets in a laser welding manner; the confluence piece comprises a negative electrode connecting part and a positive electrode connecting part, the negative electrode connecting part is connected with the battery cell negative electrode of the cylindrical battery cell, and the positive electrode connecting part is connected with the battery cell positive electrode of the cylindrical battery cell. According to the utility model, series connection of a plurality of cylindrical battery cells is realized by arranging the confluence sheets, and the probability that other modules or battery cells are influenced by battery cell failure possibly caused by heat accumulation is reduced by arranging the heat dissipation holes and the air duct outlets.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion battery technical field, concretely relates to a cylindrical electric core same side series structure. BACKGROUND

[0002] 46 system big cylindrical electric core since its advent, because its volume is bigger, heat is higher, and welding position, mode and traditional small cylinder are more flexible compared to, but this big cylindrical battery has higher standard and more choice to practical application. In small cylindrical battery manufacturing, to reach higher electric voltage and capacity requirement, often need to carry out the series connection or parallel connection of multiple modules in the battery package, the traditional module series connection structure is that the electric core is staggered arrangement, and the series connection mode of the electric core is most representative in the form of "S", and the positive and negative poles of the electric core are welded on the different sides, and the heat of the electric core is difficult to diffuse from the gap between the electric cores, which can easily cause the problems of too fast temperature rise of the module and too large temperature difference between the modules, resulting in poor consistency of the electric core, and further affecting the service life of the battery. Therefore, a new module assembly structure is needed to solve the consistency of the temperature field to meet the customer's use requirements.

[0003] In order to solve the above problems, the utility model provides a cylindrical electric core same side series structure. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a cylindrical electric core same side series structure, which welds all cylindrical electric cores on the same side, and improves the structure to balance the module temperature field aggregation.

[0005] In order to solve the above technical problems, the following technical scheme is adopted:

[0006] A cylindrical electric core same side series structure, comprising a first support, a second support and a bus bar located above the first support, the first support and the second support form a cavity structure, a plurality of cylindrical electric cores are located in the cavity structure, and the positive poles of all the cylindrical electric cores are located on the same side, and the bus bar connects the positive poles and the negative poles of adjacent cylindrical electric cores.

[0007] Preferably, the first support and the second support are fixed through a buckle structure, and the bus bar connects adjacent cylindrical electric cores together in the form of laser welding.

[0008] Further, the buckle structure is located on both sides of the first support and the second support, and the buckle structure comprises a limiting block and a limiting hole, the limiting block is arranged on one side of the first support, and the limiting hole is arranged on the other side of the first support, and the limiting block is arranged on one side of the second support correspondingly.

[0009] Further, the bus bar comprises a negative pole connecting part and a positive pole connecting part, the negative pole connecting part connects the negative poles of the cylindrical electric cores, and the positive pole connecting part connects the positive poles of the cylindrical electric cores.

[0010] Preferably, the busbar further comprises a fixing portion fixed with the first support.

[0011] Further, the fixing portion is a hole-shaped limiting structure.

[0012] Preferably, the first support and the second support are provided with cell mounting holes, and the cylindrical cells are located below the cell mounting holes.

[0013] Further, the first support and the second support are provided with positioning columns between adjacent cell mounting holes and on both sides of the busbar, and the first support and the second support are provided with positioning protrusions between the positioning columns, which cooperate with the fixing portion.

[0014] Preferably, the first support and the second support are provided with heat dissipation holes between the cell mounting holes.

[0015] Further, the side wall of the cavity structure surrounded by the first support and the second support is provided with an air duct outlet.

[0016] Beneficial technical effects:

[0017] The utility model discloses a busbar, realizes the series connection of several cylindrical cells, and through the setting of the heat dissipation hole and the air duct outlet, the probability that the cell failure caused by heat accumulation affects other modules or cells is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described below in combination with the drawings.

[0019] Figure 1 The utility model discloses a cylindrical cell same-side series connection structure overall structure schematic diagram.

[0020] Figure 2 The utility model discloses a cylindrical cell connecting structure schematic diagram.

[0021] Figure 3 It is Figure 2 The partial close -up drawing of A part.

[0022] Figure 4 The utility model discloses a busbar structure schematic diagram.

[0023] Figure 5 The utility model discloses a first support structure schematic diagram.

[0024] Figure 6 It is Figure 5 The partial close -up drawing of A part.

[0025] Figure 7 It is Figure 5 The partial close -up drawing of B part.

[0026] Figure 8 The utility model discloses second support structure schematic diagram.

[0027] In the drawing, 1, first support, 2, second support, 3, cylindrical battery cell, 4, busbar, 41, negative pole connecting part, 42, positive pole connecting part, 43, fixed part, 5, limiting block, 6, limiting hole, 7, positioning protrusion, 8, heat dissipation hole, 9, battery cell mounting hole, 10, air duct outlet, 11, battery cell positive pole, 12, battery cell negative pole, 13, positive pole output end, 14, negative pole output end. DETAILED DESCRIPTION

[0028] The utility model discloses second support structure schematic diagram.

[0029] Referring to Figures 1-8 As shown in the figure, a cylindrical battery cell same side series structure includes first support 1, second support 2 and busbar 4 located above first support 1, first support 1 and second support 2 enclose cavity structure, and a plurality of cylindrical battery cells 3 are located in the cavity structure, and battery cell positive poles of all cylindrical battery cells 3 are located on the same side, busbar 4 connects battery cell positive pole 11 and battery cell negative pole 12 of adjacent cylindrical battery cells 3, and the series connection of a plurality of cylindrical battery cells 3 is realized through busbar 4.

[0030] First support 1 and second support 2 are fixed through buckle structure, and busbar 4 connects adjacent cylindrical battery cells 3 together in the form of laser welding, buckle structure is located on both sides of first support 1 and second support 2, and buckle structure includes limiting block 5 and limiting hole 6, limiting block 5 is arranged on one side of first support 1, and correspondingly, limiting hole 6 is arranged on one side of second support 2, limiting block 5 of first support 1 and limiting hole 6 of second support 2 are matched to realize buckle function, limiting hole 6 is arranged on the other side of first support 1, and correspondingly, limiting block 5 is arranged on one side of second support 2. Limiting block 5 and limiting hole 6 assist assembling and positioning first support 1 and second support 2.

[0031] Busbar 4 includes negative pole connecting part 41 and positive pole connecting part 42, negative pole connecting part 41 connects battery cell negative pole 12 of cylindrical battery cell 3, and positive pole connecting part 42 connects battery cell positive pole 11 of cylindrical battery cell 3, and busbar 4 further includes fixed part 43, and the fixed part 43 is hole-shaped limiting structure.

[0032] First support 1 and second support 2 are provided with battery cell mounting hole 9, and cylindrical battery cell 3 is located below battery cell mounting hole 9.

[0033] The cell mounting hole positions 9 are arranged in a serpentine shape on the first support 1 and the second support 2, and adjacent cell mounting hole positions 9 are connected by the busbar 4.

[0034] Positioning columns 11 are arranged on the first support 1 and the second support 2 between adjacent cell mounting hole positions 9 and on both sides of the busbar 4, and the positioning columns 11 are used to limit the movement of the busbar 4.

[0035] The cell mounting hole positions 9 of the first support 1 and the second support 2 are provided with heat dissipation holes 8, and the side walls of the cavity structure surrounded by the first support 1 and the second support 2 are provided with air duct outlets 10.

[0036] The cylindrical cell same-side series structure further comprises a positive output end 13 and a negative output end 14.

[0037] Through the above technical solution, the utility model solves two problems: the first problem is the same-side series welding problem; the second problem is to reduce the probability of cell failure caused by heat accumulation affecting other modules or cells.

[0038] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A cylindrical cell same-side series structure, characterized in that, The first support, the second support and the busbar are arranged, the first support and the second support enclose a cavity structure, a plurality of cylindrical battery cells are arranged in the cavity structure, and the positive poles of all the cylindrical battery cells are arranged on the same side, and the busbar connects the positive poles and the negative poles of adjacent cylindrical battery cells.

2. The cylindrical cell same-side series structure according to claim 1, wherein, The first support and the second support are fixed by a buckle structure, and the busbar connects adjacent cylindrical battery cells in series by laser welding.

3. The cylindrical cell same-side series structure of claim 2, wherein, The buckle structure is arranged on both sides of the first support and the second support, and the buckle structure comprises a limiting block and a limiting hole.

4. The cylindrical cell same-side series structure of claim 1, wherein, The busbar comprises a negative pole connecting portion and a positive pole connecting portion, the negative pole connecting portion connects the negative poles of the cylindrical battery cells, and the positive pole connecting portion connects the positive poles of the cylindrical battery cells.

5. The cylindrical cell same-side series structure of claim 4, wherein, The busbar further comprises a fixing portion, and the fixing portion is fixed to the first support.

6. The cylindrical cell same-side series structure of claim 5, wherein, The fixing portion is a hole-shaped limiting structure.

7. The cylindrical cell same-side series structure of claim 2, wherein, The first support and the second support are provided with battery cell mounting holes, and the cylindrical battery cells are arranged below the battery cell mounting holes.

8. The cylindrical cell same-side series structure of claim 7, wherein, Positioning columns are arranged between adjacent battery cell mounting holes on the first support and the second support and on both sides of the busbar, positioning protrusions are arranged between the positioning columns on the first support and the second support, and the positioning protrusions are matched with the fixing portion.

9. The cylindrical cell same-side series structure of claim 8, wherein, The first support and the second support are provided with heat dissipation holes between the battery cell mounting holes.

10. The cylindrical cell same-side series structure of claim 9, wherein, Air duct outlets are arranged on the side walls of the cavity structure enclosed by the first support and the second support.

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