Composite connecting sheet and battery

Abstract

The composite connecting piece comprises an upper-layer connecting piece and a plurality of lower-layer connecting pieces, the upper-layer connecting piece is connected with a corresponding battery cell through the lower-layer connecting pieces, a plurality of connecting through holes are formed in the upper-layer connecting piece, and a welding positioning hole part is arranged on one side of each connecting through hole. The welding positioning hole part is welded to the lower-layer connecting piece through a plurality of welding spots, the lower-layer connecting piece comprises a welding part, the welding part is connected to a connecting plate part through a bending part, the connecting plate part is used for being connected with a pole of a battery cell, the connecting piece adopts a separated design, and the connecting piece is assembled through copper-nickel composite laser spot welding. And meanwhile, the lower-layer connecting sheet does not need to be redesigned for mold opening, the lower-layer connecting sheet is used as a standard general material and can form various composite connecting sheets with different combinations with different upper-layer connecting sheets, and the mold opening cost and the unit price of the product are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, concretely relates to a kind of composite connecting piece and battery. BACKGROUND

[0002] Battery module includes electric core connecting piece, electric core support and the multiple electric cores arranged on electric core support, in the battery module assembly process, each independent single electric core is formed by electric core connecting piece between the series / parallel connection, in prior art, such as patent announcement No.CN217848229U, discloses a kind of power battery connecting piece and its battery module, power battery connecting piece includes connecting piece body;Connecting piece body forms single electric core connecting part;The number of single electric core connecting part is multiple, multiple single electric core connecting part is mutually spaced apart;Connecting piece body has two opposite planes, single electric core connecting part is recessed by one plane of connecting piece body and protrudes to another plane, to obtain recess structure;Recess structure has side and bottom, the side of recess structure and the bottom of recess structure are seamlessly and integrally connected;The bottom of recess structure is provided with overflow groove, to realize better heat dissipation effect, but a connecting piece is generally adapted to a model battery, when battery electric core arrangement changes, the overall shape of connecting piece needs to be changed by re-opening mold, and the production cost is higher, which is not conducive to further reducing the production cost of connecting piece structure. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects or problems existing in the background art, and provides a kind of composite connecting piece and battery.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of composite connecting piece and battery, including upper connecting piece, several lower connecting pieces, the upper connecting piece is connected with corresponding electric core by lower connecting piece, the upper connecting piece is provided with several connecting through holes, the connecting through hole side is arranged with welding positioning hole part, the welding positioning hole part is welded to lower connecting piece by several weld points, the lower connecting piece includes welding portion, the welding portion is connected to connecting plate portion by bending portion, and the connecting plate portion is used to connect with the pole of electric core.

[0006] In some embodiments of the utility model, the upper connecting piece side is provided with side connecting part, and the side connecting part is perpendicular to the upper connecting piece.

[0007] In some embodiments of the utility model, the upper connecting piece is upper copper sheet, and the lower connecting piece is lower nickel sheet.

[0008] In some embodiments of the utility model, the bending portion includes middle section, and the both ends of the middle section are arc connection sections.

[0009] In some embodiments of the utility model, the connecting plate part is opposite the connecting through hole, the connecting plate part is located on the lower side of the connecting through hole, and the welding part and the connecting plate part are located on the same side of the upper connecting sheet.

[0010] In some embodiments of the utility model, the connecting plate part comprises a left plate part and a right plate part arranged symmetrically, and a spacing gap is arranged between the left plate part and the right plate part.

[0011] In some embodiments of the utility model, the welding part is provided with a positioning through hole corresponding to the welding positioning hole part of the upper connecting sheet, and the positioning through hole of the upper connecting sheet is located in the welding positioning hole part.

[0012] In some embodiments of the utility model, two positioning through holes are provided corresponding to each welding positioning hole part.

[0013] In some embodiments of the utility model, the welding points are arranged in the welding positioning hole part, and at least three quarters of the welding points in the welding positioning hole part are connected with the lower connecting sheet by laser spot welding.

[0014] The application further provides a battery comprising a battery cell and the composite connecting sheet according to any one of the above embodiments.

[0015] From the above description of the utility model, the following beneficial effects of the utility model are obtained compared with the prior art:

[0016] 1. The battery cell connecting sheet is designed separately, the connecting sheet is assembled by copper-nickel composite laser spot welding, is suitable for high-voltage high-capacity battery cell series and parallel connection, and helps to improve product stability and production efficiency.

[0017] 2. The upper connecting sheet mainly has the function of battery cell busbar, in the actual application process, the shape of the upper connecting sheet is determined according to the corresponding battery cell arrangement structure, and the lower connecting sheet does not need to be redesigned and opened, is used as a standard general material, can form composite connecting sheets of different combinations, reduces the mold opening cost and product unit price, and improves the process convenience and universality. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following briefly introduces the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 is a schematic view of the upper connecting sheet of the utility model;

[0021] Figure 3 is a schematic view of the arrangement of the lower connecting sheet of the utility model;

[0022] Figure 4 is a schematic view of the structure of the lower connecting sheet of the utility model;

[0023] Main figure mark explanation:

[0024] 1, upper connecting sheet, 10, connecting through hole, 11, welding positioning hole part, 12, welding spot, 13, side connecting part, 2, lower connecting sheet, 20, welding part, 21, bending part, 22, arc connecting section, 23, connecting plate part, 3, electric core, 4, positioning through hole. Specific implementation

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model, and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] In the claims, description and above drawings of the utility model, unless otherwise explicitly limited, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0027] In the claims, description and above drawings of the utility model, unless otherwise explicitly limited, for the terms of orientation, such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only used for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the utility model.

[0028] In the claims, description and above drawings of the utility model, unless otherwise explicitly limited, such as the term "fixedly connected" or "fixedly connected", it should be understood broadly, that is, any connection mode without displacement relationship and relative rotation relationship between the two, that is, it includes undetachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0029] The terms "comprise", "have" and their conjugates, as used in the claims, the specification and the above drawings, are intended to mean "including but not limited to".

[0030] Embodiment 1, see Figures 1-4 :

[0031] A composite connecting sheet and a battery, comprising an upper connecting sheet 1 and a plurality of lower connecting sheets 2, the upper connecting sheet 1 is connected with the corresponding battery cell 3 through the lower connecting sheet 2, the battery cell connecting sheet is designed to be separated, the upper connecting sheet 1 is mainly for the function of connecting the battery cell, in the actual application process, the shape of the upper connecting sheet 1 is determined according to the corresponding battery cell arrangement structure, and the lower connecting sheet 2 does not need to be re-designed and opened, and it is used as a standard general material, so as to reduce the material and mold cost, and help to improve the production efficiency.

[0032] The upper connecting sheet 1 is provided with a plurality of connecting through holes 10, and the connecting through holes 10 are arranged with welding positioning hole parts 11 on one side, the welding positioning hole parts 11 are welded to the lower connecting sheet 2 through a plurality of welding points 12, the lower connecting sheet 2 comprises a welding part 20, the welding part 20 is connected to a connecting plate part 23 through a bending part 21, and the connecting plate part 23 is used for connecting with the pole of the battery cell 3.

[0033] As an implementation manner, the bending part 21 comprises a middle section, and the two ends of the middle section are both arc connecting sections 22, so that one end of the middle section is connected to the welding part 20 through the arc connecting section 22, and the other end of the middle section is connected to the connecting plate part 23 through the other arc connecting section 22. It can be understood that the arc connecting section 22 plays a role in resisting buffering, which helps to prolong the service life of the lower connecting sheet 2.

[0034] As an implementation manner, the upper connecting sheet 1 is an upper copper sheet, which has excellent voltage resistance and overcurrent capacity, and in actual application, different thicknesses of the upper copper sheet can be selected to better meet the needs of different voltage platforms, and the lower connecting sheet 2 is a lower nickel sheet. Preferably, the upper copper sheet is made of red copper plated with nickel, and the lower nickel sheet is made of pure nickel, which has the characteristics of strong conductivity, corrosion resistance and high toughness.

[0035] As an implementation manner, the connecting plate part 23 is opposite to the connecting through hole 10, and the welding part 20 and the connecting plate part 23 are located on the same side of the upper connecting sheet 1. Preferably, the connecting plate part 23 is located on the lower side of the connecting through hole 10.

[0036] As an implementation manner, the connecting plate part 23 comprises a left plate part and a right plate part arranged symmetrically, and a spacing gap is arranged between the left plate part and the right plate part.

[0037] As an implementation form, the welding part 20 is provided with a positioning through hole 4 corresponding to the welding positioning hole part 11 of the upper connecting sheet 1, and the positioning through hole 4 of the upper connecting sheet 1 is located in the welding positioning hole part 11, so as to facilitate positioning of the welding position during welding.

[0038] As an implementation form, two positioning through holes 4 are provided corresponding to each welding positioning hole part 11.

[0039] As an implementation form, the welding points 12 are arranged in the welding positioning hole part 11, and the welding points 12 are located between the two positioning through holes 4, and at least three fourths of the welding points 12 in the welding positioning hole part 11 are connected to the lower connecting sheet 2 by laser spot welding, that is, the number of effective welding points 12 corresponding to the welding positioning hole part 11 is not less than three fourths of the total number of the welding points 12 during laser spot welding; preferably, eight welding points 12 are arranged in each welding positioning hole part 11, and at least six of them are connected to the welding part 20 of the lower connecting sheet 2 by laser spot welding.

[0040] As an implementation form, the upper connecting sheet 1 is provided with a side connecting part 13 on one side, and the side connecting part 13 is perpendicular to the upper connecting sheet 1.

[0041] A battery comprises a cell 3 and a composite connecting sheet according to any one of the above-mentioned implementation forms, and the pole of the cell 3 is connected to the connecting plate part 23 of the lower connecting sheet 2.

[0042] Example 2:

[0043] Example 1 is repeated, but the welding points 12 are arranged in the welding part 20 of the lower connecting sheet 2, and the welding part 20 is provided with two positioning through holes 4 corresponding to each other, and the welding points 12 are located between the two positioning through holes 4.

[0044] The above description of the specification and the examples is used to explain the protection scope of the utility model, but does not constitute the limitation of the protection scope of the utility model. Through the inspiration of the utility model or the above-mentioned examples, the ordinary skilled in the art combines the common knowledge, the ordinary technical knowledge in the art and / or the prior art, and obtains the modification, equivalent replacement or other improvement of the utility model examples or one part of the technical features through logical analysis, reasoning or limited test, which should be included in the protection scope of the utility model.

Claims

1. A composite connector, characterized in that: It includes an upper connecting piece (1) and several lower connecting pieces (2). The upper connecting piece (1) is connected to the corresponding battery cell (3) through the lower connecting pieces (2). The upper connecting piece (1) has several connecting through holes (10). A welding positioning hole (11) is arranged on one side of the connecting through hole (10). The welding positioning hole (11) is welded to the lower connecting piece (2) through several welding points (12). The lower connecting piece (2) includes a welding part (20). The welding part (20) is connected to the connecting plate part (23) through a bending part (21). The connecting plate part (23) is used to connect with the pole of the battery cell (3).

2. The composite connector according to claim 1, characterized in that: The upper connecting piece (1) has a side connecting part (13) on one side, and the side connecting part (13) is perpendicular to the upper connecting piece (1).

3. The composite connector according to claim 1, characterized in that: The upper connecting piece (1) is an upper copper sheet, and the lower connecting piece (2) is a lower nickel sheet.

4. The composite connector according to claim 1, characterized in that: The bent portion (21) includes a middle section, both ends of which are arc-shaped connecting sections (22).

5. A composite connector according to claim 1, characterized in that: The connecting plate part (23) is directly opposite the connecting through hole (10), and the connecting plate part (23) is located directly below the connecting through hole (10). The welding part (20) and the connecting plate part (23) are located on the same side of the upper connecting piece (1).

6. A composite connector according to claim 5, characterized in that: The connecting plate portion (23) includes a left plate portion and a right plate portion arranged symmetrically, with a gap between the left plate portion and the right plate portion.

7. A composite connector according to claim 1, characterized in that: The welding part (20) is provided with a positioning through hole (4) corresponding to the welding positioning hole part (11) of the upper connecting piece (1), and the positioning through hole (4) of the upper connecting piece (1) is located in the welding positioning hole part (11).

8. A composite connecting piece according to claim 7, characterized in that: Each welding positioning hole (11) is provided with two positioning through holes (4).

9. A composite connector according to any one of claims 1-8, characterized in that: The welding points (12) are arranged in the welding positioning hole (11), and at least three-quarters of the welding points (12) in the welding positioning hole (11) are connected to the lower connecting piece (2) by laser spot welding.

10. A battery, characterized in that: It includes battery cells and a composite connector as described in any one of claims 1-9.

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